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HomeMy WebLinkAbout011-310-028�RoL/ 334!�K78 STORM WATER POLLUTION PREVENTION PLAN FOR: CENTERVILLE RESIDENTIAL DEVELOPMENT APN: 011-310-028 011-310-029 DEVELOPER: SIGNALIZED- INTERSECTION WEST, L.L.C. Phone — (858) 487-9222 Fax — (858) 487-1277 t 15644 Pomerado Rd, Suite 303 Poway, CA 92064 CONTRACTOR'S STORM WATER POLLUTION PREVENTION MANAGER: Dan and Ben Allen - Owner Phone -Above SWPPP PREPARED BY: GILBERT ENGINEERING Wes Gilbert — Principal Phone — 530.899.9503 70 Declaration Drive, Suite 101 Chico, California 95973 S WPPP PREPARATION DATE: SEPTEMBER 13, 2005 ESTIMATED PROJECT DATES: Start of Construction — August 1, 2005 Completion of Construction — May 31, 2006 Date Processed: 9/20/2005 Signalized Intersection West LLC 15644 Pomerado Rd Ste 303 Poway, CA 92064 RECEIPT OF YOUR NOTICE OF INTENT Page 1 of 2 Arnold Schwarzenegger Governor The State Water Resources Control Board (State Water Board) has received and processed your NOTICE OF INTENT TO COMPLY WITH THE TERMS OF THE GENERAL PERMIT TO DISCHARGE STORM WATER ASSOCIATED WITH CONSTRUCTION ACTIVITY. Accordingly, you are required to comply with the permit requirements. The WDID identification number: 51104C336678. Please use this number in any future communications regarding this permit. SITE DESCRIPTION OWNER: Signalized Intersection West LLC DEVELOPER: Signalized Intersection West LLC COUNTY: Butte SITE ADDRESS: West Of Centerville Rd & S Of Doe Mill Rd Chico, CA 95973 COMMENCEMENT DATE: 4/15/2005 EST. COMPLETION DATE: 5/1/2006 When construction is complete or ownership has been transferred, dischargers are required to notify the Regional Water Board by submitting a Notice of Termination (NOT). All State and local requirements must be met in accordance with Special Provision No. 7 of the General Permit. If you do not notify the State Water Board that construction activity, has been completed, you will continue to be invoiced for the annual fee each July. If you have any questions regarding permit requirements, please contact your Regional Water Board at (530) 224-4845. Please visit the storm water web page at www.waterboards.ca.gov/stormwtr/index.html to obtain storm water related information and forms. Sincerely, Storm Water Section Division of Water Quality http://water l 0l .waterboards. ca.gov/stormwater/searchIConSearch.asp?Receipt=c336678&... 4/25/2006 State Water Resources Control Board Alan C. Lloyd Division of Water lit ua Quality PhD Secrelaryfor 1001 I Street • Sacramento, California 95814 • (916) 341-5538 Environmental Mailing Address:P.O. Box 1977 • Sacramento, California • 95812-1977 Protection FAX (916) 341-5543 • Internet Address: http://www.waterboards.ca.gov/stonnwtr/index.htm] Email Address: stormwater@waterboards.ca.gov Date Processed: 9/20/2005 Signalized Intersection West LLC 15644 Pomerado Rd Ste 303 Poway, CA 92064 RECEIPT OF YOUR NOTICE OF INTENT Page 1 of 2 Arnold Schwarzenegger Governor The State Water Resources Control Board (State Water Board) has received and processed your NOTICE OF INTENT TO COMPLY WITH THE TERMS OF THE GENERAL PERMIT TO DISCHARGE STORM WATER ASSOCIATED WITH CONSTRUCTION ACTIVITY. Accordingly, you are required to comply with the permit requirements. The WDID identification number: 51104C336678. Please use this number in any future communications regarding this permit. SITE DESCRIPTION OWNER: Signalized Intersection West LLC DEVELOPER: Signalized Intersection West LLC COUNTY: Butte SITE ADDRESS: West Of Centerville Rd & S Of Doe Mill Rd Chico, CA 95973 COMMENCEMENT DATE: 4/15/2005 EST. COMPLETION DATE: 5/1/2006 When construction is complete or ownership has been transferred, dischargers are required to notify the Regional Water Board by submitting a Notice of Termination (NOT). All State and local requirements must be met in accordance with Special Provision No. 7 of the General Permit. If you do not notify the State Water Board that construction activity, has been completed, you will continue to be invoiced for the annual fee each July. If you have any questions regarding permit requirements, please contact your Regional Water Board at (530) 224-4845. Please visit the storm water web page at www.waterboards.ca.gov/stormwtr/index.html to obtain storm water related information and forms. Sincerely, Storm Water Section Division of Water Quality http://water l 0l .waterboards. ca.gov/stormwater/searchIConSearch.asp?Receipt=c336678&... 4/25/2006 TABLE OF CONTENTS I. Project Information............................................................................................................1 II. Section A — Storm Water Pollution Prevention Plan (SWPPP) Source Identification.................................................................................................. I Erosion and Sediment Control......:............................................................................4 Non -Storm Water Management..................................................................................5 Post -Construction Storm Water Waste Management................................................6 List of Contractors/Subcontractors............................................................................ 6 III. Section B — Monitoring Program and Reporting Requirements General....................................................................................................................... 6 Monitoring & Reporting Program............................................................................. 6 Recordsand Certificates............................................................................................7 Certification............................................................................................................... 8 SWPPP ATTACHMENTS ATTACHMENT A............................................................................ BMP Miscellaneous Details ATTACHMENT B...................................................................... SWRCB Order No. 99-08-DWQ ATTACHMENT C................................................................................... Copy of Notice of Intent ATTACHMENT D..................................................................................Erosion Control Site Plan ' I. PROJECT INFORMATION Project Name: CENTERVILLE RESIDENTIAL DEVELOPMENT Project Location: CENTERVILLE ROAD (SOUTH OF DOE MILL ROAD) BUTTE COUNTY, CHICO, CALIFORNIA Project Developer: SIGNALIZED INTERSECTION WEST, L.L.0 Contact Person: DAN AND BEN ALLEN Owner's Mailing Address: 15644 POMERADO RD, SUITE 303 POWAY, CA 92064 The construction. of the Centerville Residential Development consists of the following construction features that pertain to the storm and surface water elements: ➢ Clearing and grubbing of approximately 80.00 acres +/- for a single-family home, residential subdivision. ➢ Excavation, backfill and compaction of approximately 2,500 cu. yds. of native soils to obtain the road sub -grade, residential building pad grades, and. driveway areas as required by the plans. ➢ Supply, placement, and compaction of approximately 2,355 tons of base rock aggregates as structural section for roadway and parking areas. ➢ Placement of approximately 4 tons of asphaltic concrete pavement, with 2 -inch thickness. ➢ Construction of underground utilities, including wastewater treatment and disposal, and storm drain collection systems. II. SECTION A - STORM WATER POLLUTION PREVENTION PLAN (SWPPP) A. Source Identification 1. Enclosed herewith is a drainage basin map that shows the project location and its relation to the existing drainage basin. 2. Enclosed herewith are drawings that present the following: ➢ Existing drainage quadrangle map. ➢ General site arrangement. Page 1 of 8 ➢ Areas of cut and fill. ➢ Drainage patterns and slopes established after grading is completed. . ➢ Areas where paved roadways will occur. ➢ Building pad grading will be performed as a part of the site work construction. 3. General Descriptions: ➢ There are no existing site features that are known to contribute pollutants to storm water. ➢ No toxic materials are to be treated, stored, disposed or spilled on the construction site. All fueling of construction vehicles will be done from a fueling and lubrication truck on the construction site. No fuel tanks will be placed on site. ➢ The following types and approximate numbers of construction vehicles will be utilized on site: ' * Scrapers 2 * Dozers 1 * Blades for grading 2 * Compaction equipment 2 * Water truck 2 * Backhoe 2 All of this equipment will be stored in an area clear of any storm water drainage systems. A staging area will be used and designated as shown on the general site arrangement map. All construction equipment remaining on the site will; be stored, cleaned and maintained within the staging area, at the end of the working day. ➢ Other construction materials which are to be utilized on site and how they will be handled is as follows: * Timber formwork: Will be protected from storm waters until constructed as formwork. When construction is completed the formwork will be removed from the site for disposal or re -use. * Timber roof trusses: Will be fabricated off-site, brought to the site and erected immediately. No on-site storage is anticipated for these trusses. Page 2 of 8 * Concrete: All concrete will be mixed off-site, brought to the site by truck, and placed directly into the formwork. No on-site storage ' of cement, aggregate, sand, etc., utilized to make concrete, is anticipated for this project. Left over concrete debris shall be allowed to set and will be disposed of with solid waste materials as described herein. Washing of concrete trucks will not be allowed onsite, except in areas designated on plans. k Masonry: All masonry block will be stored on-site as required. This block will be protected from storm water by vinyl sheets until constructed in place. The grouting for masonry will be mixed on- site; however, this procedure will be in containers with a negligible amount of residue disposed of on-site. Wood siding: All siding will be brought to .the site and erected immediately. However, if on-site storage is required, a storage area will be prepared within the staging area, which allows for proper drainage of storm waters to the storm water collection system. * Structural and miscellaneous steel: It will be the basic approach to erect all structural and miscellaneous steel as it arrives on-site with a minimum of on-site storage. The steel itself will not contain any components which could pollute the storm water system. * Asphalt: All asphalt will be mixed off-site, brought to the site by truck and placed directly onto the roadway. * Sand and Gravel: All sand and gravel will be protected from storm waters until it is used. It will be stockpiled in areas (such as staging area) that are outside of the storm drainage system and will be encompassed using straw wattles or silt fences. ➢ The general construction procedure will be to construct the roadways as shown on the contract drawings. Temporary "construction" roads will not be utilized. In this way, construction access, materials receiving, and storage areas will be limited to the areas on-site which are properly drained and which do not interfere with the proposed and existing storm drainage system. ➢ Solid wastes shall be loaded directly into trucks for off-site disposal. Hazardous wastes shall be stored in watertight shipping containers, clearly marked, and segregated in an area away from non -waste materials. Page 3 of 8 Contractor shall provide portable toilets that will be located and maintained in an area away from concentrated water and traffic flow paths ' for the duration of the project. Weekly maintenance will be provided. 4. Pollutants ' ➢ Due to the nature of excavations required for the construction of this project, no pollutants are expected to be present in any storm water discharges (other than sediments). ' 5. Site ' ➢ The subdivision project will be located on 80.00± acres. Prior to construction the site is primarily open, flat terrain with native vegetation consistent with area. It is estimated that before ' construction, the existing site has - a run-off coefficient of approximately 0.52 ➢ After construction is completed, it is estimated that the site will have a runoff coefficient of approximately 0.52. Final impervious area including building roofs and paved surfaces will encompass 1.54 acres, or 2% of the site. 6. Preliminary Construction Activity Schedule: ➢ Clearing and Demolition — 8/1/05 —10/1/05 ➢ Rough Grading — 9/1/05 to 12/1/05 ➢ Storm Drain Installation — 9/15/05 to 11/1/05 ➢ Water Line Installation — 9/30/05 to 11/15/05 ➢ Utility Installation —10/15/05 to 1/30/06 ➢ Pour Building Foundations/Slabs —10/30/05 to 2/1/06 ➢ Building Construction -11/15/05 to 3/30/06 ➢ Install Site Concrete —12/1/05 to 3/30/06 ➢ Place Base Rock and Paving —9/15/05 to.3/15/06 ➢ Install Landscaping —10/1/05 to 5/31/06 7. Notice of Intent ➢ A copy of the Notice of Intent is attached to this SWPPP as Attachment C. B. Erosion and Sediment Control Page 4 of 8 e The following erosion and sediment controls shall be installed in advance of predicted ' rainfall events and shall be maintained in place during the period between October 15`x' and April 15th each year until the building construction has been completed and the landscaping has germinated and is established: 1 1. Slope and Soil Stabilization: Fill and cut slopes shall be maintained at slope of 2:1 or flatter during construction. Final grading shall conform to the grades and slopes specified on the construction drawings and shall be compacted immediately after construction. Loose material along the slopes shall be removed and placed in non -cut or fill areas as directed by the Owner. During the period between ' October 15 and April 15, all sloped areas and areas where land clearing has been performed, shall be stabilized using a hand broadcast layer of loose straw or a grass seed mixture, or by hydroseeding. 2. Perimeter Protection: Prior to construction straw wattles fiber rolls b o s or silt ' fencing barriers are to be installed around the perimeter of the site, in areas in which site runoff flows away from property, to minimize sediment from crossing project boundaries. Careful attention shall be practiced to minimize sediments ' from running off the project site, onto adjacent public roads, and properties. All landscaped areas are to be protected with sand bags or straw wattles. 3. Stabilized Construction Entrance: A stabilized construction entrance shall be constructed at all ingress and egress points from the project site, (for instance in an area shown on the Erosion Control Site Plan). It will be constructed of a filter cloth barrier under a gravel pad and will be placed over soil, up to the paved area. This construction entrance will aid in minimizing mud and sediment from leaving the site. In addition, the entrance shall be maintained until such time as the base ' rock is installed for the proposed roadways. 4. Storm Drain Inlet Protection: Prior to predicted rainfall events and prior to ' placement of base rock, place and maintain straw wattles, or gravel -filled filter bags around storm drain inlets. After placement of base rock, place and/or maintain best management practices until all areas have been landscaped and the ' roadway construction is completed. ,' C. Non -Storm Water Management ➢ For construction purposes, dust control water trucks will be utilized on site. Any excess runoff water from this operation may not leave the site and may enter the proposed storm drain sediment basins only after treatment has been provided as described within the best management practices included herein and in Attachment A of these documents. Dust control measures shall `be applied as outlined on the construction documents and as required by the"City of Chico: It is Page 5 of 8 difficult to estimate the daily amount (750± gal.) that could enter the system; however, except for soil sediments, it is not expected that this water will be detrimental to the storm drain system. D. Post -Construction Storm Water Waste Mana eg ment When construction is placed into operation for which it was designed, the following features have been designed into the operations: ➢ An oversized, on-site storm drainage pipe system and storm drain interceptor has been designed for the collection, treatment and detention of pre and post - development storm waters. ' In addition to the above, it should be emphasized that Signalized Intersection West, L.L.C: shall be responsible for maintaining the storm water pollution prevention plan as submitted as well as maintaining proper control measures consistent with the City of / ' Chico )policies and procedures which adhere to federal and state regulations and ordinances. E. List of Contractors/Subcontractors The contractor and subcontractors responsible for the on-site construction will be as follows: 1. General contractor: .............. Signalized Intersection West, L.L.C. Phone — (858) 487-9222 2. Paving contractor: ............... Reed Construction, Inc. Phone- (530) 891-6555 3. Underground contractor:..:....Reed Construction, Inc. Phone- (530) 891-6555 III. SECTION B - MONITORING PROGRAM AND REPORTING REQUIREMENTS A.. General Signalized Intersection West, L.L.C.., the developer, will be responsible for carrying out the S WPPP. Contact Information: Dan and Ben Allen Page 6 of 8 15644 Pomerado Road Poway, CA 92064 (858) 487-9222 — phone (858) 487-1277 - fax ' B. Monitoringporting Prop am 1. The Owner will monitor and manage all phases of the construction. Therefore, in the everyday construction operations, the Owner will be responsible for monitoring all phases of the SWPPP. They will monitor before and after storm events, monitor the erosion control procedures outlined on the drawings and, in general, verify that no pollutants are entering the storm water system. The owners and construction management staff will be trained to monitor the S WPPP, and also to make certain that the contractor(s) are fully aware of the program prior to the start of any construction. Training shall be both formal and informal and shall occur on an ongoing basis. It should also include_training/workshops offered by 1 SWRCB, RWQCB, or by locally recognized agencies or professionally authorized organizations. 2. The contractor or qualified person in charge of overseeing BMPs shall have a copy of the general permit and SWPPP and will have the documents onsite at all times and during all construction activities. 3. Construction site inspections should be conducted 'before an anticipated storm, during an extended event, and following the actual storm to identify areas contributing to a discharge of storm water associated with a construction activity. ' 4. For each required inspection, the discharger at a minimum, shall complete a checklist that includes the following information: ➢ Inspection date. ➢ Best estimate of beginning, amount, duration of last storm event, including time elapsed. ' ➢ Description of inadequate BMPs. ➢ If it is possible to safely access during inclement weather, list observations of all BMPs: erosion controls, sediment controls, chemical and waste controls, and non -storm water controls. Otherwise, list result of visual inspection at relevant outfall, discharge point, or downstream location and projected required maintenance activities. ➢ Lists corrective actions required, including any changes to SWPPP necessary and implementation dates. ➢ Inspectors name, title, and signature. Page 7 of 8 The checklist shall be prepared using the inspection checklist form provided by the SWRCB or RWQCB, or on other forms with equivalent information. C. Records and Certificates IThe Owner, or qualified personnel will be responsible for keeping records of all inspections, corrections required, follow-up actions, and verifying that the contractor is utilizing the best management practices. They must annually certify (by July 1 sc of each year), that the project is in compliance. Certification "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, the information submitted is to the best of knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name o� L Signa ' This S WPPP was prepared by: ' Nam Signa e Page 8 of 8 Title a3 Dat7// iD1eL� �hg/�Pef Title Date - ATTACHMENT «A99 0 .BEST MANAGEMENT PRACTICES INDEX: 1. Water Conservation Practices: (NS 1) 2. Paving and Grinding Operations: (NS3) 3. Vehicle and Equipment Cleaning: (NS8) 4. Silt Fence: (SEI) 5. Fiber Rolls: (SE5) 6. Gravel Bag Berm: (SC6) 7. Street Sweeping and Vacuuming: (SC7) 8. Straw Bale Barrier: (SC9) 9. Storm Drain Inlet Protection: (SE 10) 10. Hydroseeding: (SS4) 11. Straw Mulch: (SS6) 12. Stabilized Construction Entrance/Exit: (TC1) 13. Stabilized Construction.Roadway: (TC2) 14. Entrance/Outlet Tire Wash:. (TC3) 15. Wind Erosion Control: (WEl) 16. Material Delivery and Storage: (WM1) 17. Material Use: (WM2) 18. Stockpile Management: (WM3) 19. Spill Prevention and Control: (WM4) 20. Solid Waste Management: (WM$) 21. Concrete Waste Management: (WM8) Water Conservation Practices NS=i Description and Purpose Water conservation practices are activities that use water' during the construction of a project in a manner that avoids causing erosion and the transport of pollutants offsite. These practices can reduce or eliminate non-stormwater discharges, Suitable Applications Water conservation practices are suitable for all -co sites where water is used, including .Piped -water, metered water, trucked water, and water from a reservoir. Limitations ■ None identified, implementatlon ■ Keep water equipment in good working condition, 0 b jectives EC Erosion Control ✓ SE Sediment Control ✓ TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control Waste Management and Materials Pollution Control Legend: ✓ Primary objective ✓ Secondary Objective Targeted Constituents Sediment Nutrient Trash . Metals Bacteria Oil and Grease Organics Potential Alternatives ' None ■ Stabilize water truck filling area, ■ Repair water leaks .rom tl , P P Y ■ Washing of vehicles and equipment on the construction site ' is discouraged. ■ Avoid using water to clean construction areas. If water must be used for cleaning or surface preparation, surface should be swept and vacuumed first to remove dirt. This will minimize amount of water required. ASQA CAINerwln • Stormwater OU fly ' - Assoclat<on January 2003 Callfornla Stormwater BMP Handbook ' Construcflon 1 of 2 r; www,cabmphandbooks.com NS --1 Water Conservation Practice � s ' ■ Direct construction water runoff to areas where it can soak into the ground or be collected and -reused, ' .■ Authorized non-stormwater discharges to the storm drain system, channels, or receiving waters are acceptable with the implementation of appropriate BMPs, ■ Lock water tank valves to prevent unauthorized use. Costs ' The cost is small to none compared to the benefits of conserving water. Inspection and Maintenance ■ Inspect and verify that activity based BMPs are in place prior to the commencement of ' authorized non-stormwater discharges. ■ Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges ' are occuring. ■ Repair water equipment as needed to prevent unintended discharges. ' - Water trucks - Water reservoirs (water buffalos) Irrigation systems Hydrant connections - References Stormwater Quality Handbooks - Conetruction Site Best 'Management Practices (BMPs) Manual, State of California'Department of Transportation (Caltrans), November 2000. 2 of 2Callfornla Stormwater BMP Handbook January 2003 Constructloo 41 www.cabmphandbooks.com . Paving. and Grindin Operations 'NS -3 Description and Purpose Prevent or reduce the discharge of pollutants from paving operations, using measures to prevent.runon and runoff Pollution, properly disposing of wastes, and training employees and subcontractors. Sultable Applications These procedures are implemented where paving, surfacing, resurfacing, or sawcutting, may pollute stormwater runoff or discharge to the storm drain system or watercourses. Limitations ■ Finer solids are not effectively removed by filtration. systems. ■ Paving opportunities may be limited during wet weather. implementation ' General ■ Avoid paving during the wet season when feasible, ' ■ Reschedule paving and grinding activities if rain is in the forecast, ■ Train employees and sub -contractors in pollution prevention and reduction, . ' 0 b jectives EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non•Stormwater ✓ Management Control WN! Waste Management and ✓ Materials Pollution Control Legend: ✓ Primary Objective ✓ Secondary objective Targeted Constituents Sediment Nutrients Trash Metals Bacteria. Oil and Grease Organics Potential Alternatives None ■ Store materials away from drainage courses to prevent A S O stormwater runbn (see WM-1, Material Delivery and Storage): arltornla stormwater aual1w Association )anuary 2003 Callfomla Stormwater BMP Handbook Construction 1 bf 4 www.cabmphandbooks.com 1 NS -3 Paving and Grindin 'rati O e i g p ons ' l ' ■ Protect drainage courses, particularly in areas with a grade, by employing BMPs to divert runoff or to trap and filter sediment, ' ' If paving involves an onsite mixing plant, follow the stormwater permitting requirements for industrial activities, ■ Stockpile material removed from roadways away from drain inlets, drainage ditches, and ' watercourses, These materials should be stored consistent with WM-g, Stockpile Management, ' Disposal of PCC and AC waste should be in conformance with WM-8, Concrete Waste Management, ' Saw Cutting, Grinding, and PavementRemoual ■ Shovel or vacuum saw -cut slurry and remove from site. Cover or barricade storm drains -'- during saw cutting to contain slurry. ' ■ When paving involves AC, the following steps should be implemented to prevent the discharge of grinding residue, uncornpacted or loose AC, tack coats, equipment cleaners, or unrelated paving materials: ' - AC grindings, pieces, or chunks used in embankments or shoulder ba m allowed to enter any storm drains or watercourses. Install silt fence ��� not be ' stabilized or permanent controls are in place. Examples of temporary perimeter controls can be found in EC -g, Earth Dikes and Drainage Swales; SE - Rolls. i, Silt Fence; or SE -5, Fiber Collect and remove all broken asphalt and recycle when practical. Old or -spilled asphalt must be recycled or disposed. Any AC chunks and pieces used in embankments must be placed above the water table ' and covered by at least i ft of material. . ■ Do not allow saw -cut slurry to enter stbrm drains or watercourses. Residue from grinding ' operations should be picked dp by means of a vacuum attachment to the should not be allowed to flow across the pavement and should not be left*on � machine, urface the pavement. See also WM-8, Concrete Waste'Management, and WM-ia, Liquid Was eof . 'Management, ■ Dig out activities should not be conducted in the rain. ' Collect dig out material by mechanical or manual methods, This material may be recycled for use as shoulder backing or base material. . ■ If dig out material cannot be recycled, transport the material back to an approved storage t site, ' Asphaltic Concrete Paving • Ifpaving involves asphaltic cement concrete, follow these steps: ' 2 of 4 Callfornla Stormwater. BMP Handbook ]anuarv..�nnv Construction �1; www.cabmphandbdoks.com Paving and Grinding Operations NS. -3 - Do not allow sand or gravel placed over new asphalt to wash into storm drains, streets, or creeks. Vacuum or sweep loose sand and gravel and properly dispose of this waste by referring to WM-5, Solid Waste Management. 1 old asphalt must be disposed of properly. Collect and remove all broken• asphalt from the site and recycle whenever possible. Portland Cement Concrete Paving ■ Do not wash sweepings from exposed aggregate concrete into a storm drain.system. Collect and return to aggregate base stockpile or dispose of properly, ■ Allow aggregate rinse to settle. Then, either allow rinse water to dry in a temporary pit as described in WM-8, Concrete Waste Management, or pump the water to the sanitary sewer if allowed by the local wastewater authority. Sealing Operations ■ During chip seal application and sweeping operatin' s,'petroleum or.petroleum covered aggregate must not be allowed to enter any storm drain or water courses. Apply temporary perimeter controls until structure is stabilized. ■ Drainage inlet structures and manholes should be covered with filter fabric during . application of seal coat, tack coat, slurry* seal, and fog seal. ■ Seal coat, tack coat, slurry seal, or fog seal should not be applied if rainfall is predicted to occur during the application or curing period. PavingEquipment ■ Leak$ and spills from paving equipment can contain toxic levels of heavy metals and oil and grease. Place drip pans or absorbent materials under paving equipment when not in use. Clean up spills with absorbent materials rather than burying.. See NS-io, Vehicle and Equipment Maintenance, WM-4, Spill Prevention.and Control, and WM-1o, Liquid Waste Management. ■ Substances.used to coat asphalt transport trucks, and asphalt spreading equipment should not contain soap and should be non -foaming and non-toxic. ■ Use only non-toxic substances to coat asphalt -transport trucks and asphalt spreading equipment. ■ Paving equipment parked onsite should be parked.over plastic to prevent soil contamination. ■ Clean asphalt coated equipment offsite whenever possible. When cleaning dry, -hardened asphalt from equipment, manage hardened asphalt debris as described in WM=5, Solid Waste Management. Any cleaning onsite should follow NS -8, Vehicle and Equipment Cleaning, 1 January 2003 Callfornla Stormwater BMP Handbook 3 of 4 Constructtoh �I. www,cabmphandbooks.com NS -3 Paving and 'Grindin Operations Thermoplastic Striping ■ Thermoplastic striper and pre -heater equipment shutoff valves should be. inspected to ensure that they are working properly to prevent leaking thermoplastic from entering drain inlets, the stormwater drainage system, or watercourses. ' . Pre -heaters should be filled carefully to prevent splashing or spilling of hot thermoplastic. Leave six inches of space at the top of the pre -heater container when filling thermoplastic to allow room for material to move when the vehicle is deadheaded. ' ■ Do not pre -heat, transfer, or load thermoplastic near drain inlets or watercourses. ■ Clean truck beds daily of loose debris and melted thermoplastic. When possible, recycle ' thermoplastic material. Raised/Recessed Pavement Marker Application and Removal ■ Do not transfer or load bituminous material near drain inlets, the stormwater drainage ' system, or watercourses. ■ Melting tanks should be loaded witl� care and not filled to beyond six inches from the top to ' leave room for splashing when vehicle is deadheaded: ■ When servicing or filling melting tanks, ensure all pressure is released before removing lids ' to avoid spills.. ■ on large-scale projects, use mechanical or manual methods to collect excess bituminous material from the roadway after removal of markers. Costs ■ All of the above are low cost measures. ' Inspection and Maintenance ■ Inspect and verify that activity -based. BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly ' during the rainy season and -at two-week intervals in the non -rainy season to verify continued BMP implementation. ' ■ Keep ample supplies of drip pans or absorbent m;iterialg onsite. .■ Inspect and maintain machinery regularly to minimize leaks and drips. ' References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from . Construction Related Activiti2s; Santa Clara Valley Nonpoint Source Pollution'Control Program, 1995.. Hot Mix Asphalt -Paving Handbook AC 150/5370-14, Appendix I, U.S..Army Corps of Engineers, ' .July 1991, Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, ' State of California Department of Transportation. (Caltrans); November 2000. 4 of 4- California Stormwater BMP Handbook January 2003 Constnictton www.cabmphandbooks.com NS- SVehicle and Equipment Cleaning Description and Purpose Vehicle and equipment cleaning procedures and practices eliminate or reduce the discharge of .pollutants to stormwater from vehicle and equipment cleaning operations. Procedures and practices include but are not limited to: using offsite facilities; washing in designated, contained areas only; ehminating.discharges to the storm drain by infiltrating the wash water; and training employees and subcontractors in proper cleaning procedures. Objectives EC Erosion Control SE Sediment Control TR Tracking Control -WE Wind Erosion Control NS Non•Stormwater m Management Control WM Waste Management and Materials Pollution Control Legend: Primary Objective © Secondary Objective Targeted Constituents Sediment (� . Nutrients' Q( Trash Metals Bacteria Oil and Grease Organics [� Suitable Applications Potential Alternatives These procedures are suitable on all construction sites where None vehicle and equipment cleaning is performed. Limitations Even phosphate -free, biodegradable soaps have been shown to be toxic to fish before the soap degrades. Sending vehicles/equipment offsite should be done in conjunction with TR -1, Stabilized Construction Entrance/Exit. Implementation Other options to washing equipment onsite include contracting with either an offsite or mobile commercial washing business. These businesses may be better equipped to handle and dispose . of the wash waters properly. Performing this work offsite can - also be economical by eliminating the need for a separate washing operation onsite. If washing operations are to take place onsite, then: CAMMUSTOMaA70 January 2003 Callfbmia Sbormwater BMP Handbook 1 of 3 Constrvctlon www.cabmphandbooke.com NS -8 Vehicle and Equipment Cleaning ■ Usehos hate -free bio p p degradable soaps. ■ Educate employees and subcontractors on pollution prevention measures. ■ Do not permit steam cleaning onsite. Steam cleaning can generate significant pollutant ' concentrates. ■ Cleaning of vehicles and equipment with soap, solvents or steam should not occur on the ' project site unless resulting wastes are fully contained and disposed of. Resulting wastes should not be discharged or buried, and must be captured and recycled or disposed according to the requirements of WM-1o, Liquid Waste Management or WM-6, Hazardous ' Waste Management, depending on the waste characteristics. Minim»e use of solvents. Use of diesel for vehicle and equipment cleaning is prohibited. ■ All vehicles and equipment that regularly enter and leave the construction site must be ' cleaned offsite. ■ When vehicle and equipment washing and cleaning must occur onsite, and the operation ' cannot be located within a structure or building equipped with appropriate disposal facilities, the outside cleaning area should have the following characteristics: ' - Located away from storm drain inlets, drainage facilities, or watercourses Paved with concrete or asphalt and bermed to contain wash waters and to prevent runon and runoff Configured with a sump to allow collection and disposal of wash water ' - No discharge of wash waters to storm drains or watercourses - . Used only when necessary ' ■ When cleaning vehicles and equipment with water: Use as little water as possible. High-pressure sprayers may use less water than a hose ' and should be. considered - Use positive shutoff valve to minimize water usage t- Facility wash racks should discharge to a sanitary sewer, recycle system or other approved discharge. system and must not discharge to the storm drainage system, ' watercourses, or to groundwater Costs ' Cleaning vehicles and equipment at an offsite facility may reduce overall costs. for vehicle and equipment cleaning by eliminating the need to provide similar services onsite. * When onsite cleaning is needed, the cost to establish appropriate facilities is relatively low on larger, long - duration projects, and moderate to high on small, short -duration projects. 2 of 3 Callfornla Sbc)rmwater BMP Handbook January 2003 Consb uctlon w.ww.cabmphandbooks.com Vehicle and- E ui rnent cl nin q p ea g NS=8 Inspection and Maintenance ■ Inspect and verify that activity -based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and at two-week intervals in the non -rainy season to verify continued BMP implementation. ■ Inspect BMPs subject to non-stormwater discharges daily while non-stormwater discharges occur. ■ Inspection and maintenance is minim A although some berm repair maybe necessary. ■ Monitor employees and subcontractors throughout the duration of the construction project to ensure appropriate practices are being implemented. ■ Inspect sump regularly and remove liquids and sediment as needed. ■ Prohibit employees and subcontractors from washing personal vehicles and equipment on the construction site. References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Swisher, R.D. Surfactant Biodegradation, Marcel Decker Corporation, 1.987 January 2003 Callfornla Sbormwabar BMP Handbook 3 of 3 Construction Www.cabmpha ndbooks.com Silt fence SE -1 Objectives Description and Purpose ' Asilt.fence is made of a filter fabric that has been entrenched, attached to supporting poles, and sometimes backed by a plastic or wire mesh for support. The silt fence detains t sediment -laden water, promoting sedimentation behind the fence. Suitable Applications Silt fences are suitable for perimeter control, placed below areas where sheet flows discharge from the site.- They should also be used as interior controls below disturbed areas where runoff may. occur in *the form ofsheet and rill erosion. Silt fences are ' generally ineffective in locations where the flow is concentrated . and. are only applicable for sheet;or overland flows. Silt fences. are most'effective when used ia.coinbination with erosion t controls. Suitable applications include: ■ Along the perimeter of a project. ' ■ Below the toe or down slope of exposed and erodible slopes, ■ Along streams and channels. ' temporary s ■ Around oil -are . P �'3' P as and stockpileg. 'it Below other small cleared areas, Limitations Do not use in streams, channels, drain inlets, or anywhere flow ' . is Concentra-ted, EC Erosion Control SE Sediment Control . TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: ✓ Primary Objective ✓ secondary Objective Targeted Constituents Sediment V Nutrients Trash Metals Bacteria' 011 and Grease Organics Potential Alternatives SE -5 Fiber Rolls SE -8 Gravel Bag Berm SE -8 Sandbag Bartter SE -9 Straw Bale'Barder XCSQA rnta rmwater Quality Association January 2003 Californla Stormwater BMP Handbook 1 of 8 Constructjon www.cabrnphandbooks.com SE -1 Silt Fence w Do not use in locations where ponded water may cause flooding, ' a Do notlace fence p on a slope, or across any contour line. If not installed at the same ' elevation throughout, silt fences*will create erosion, x PUter fences will create a temporary sedimentation pond on the upstream side of the fence and may cause temporary flooding, Fences not constructed on a level contour will be ' overtopped by concentrated flow resulting in failure of the filter fence, ■ Improperly installed fences are subject to failure from undercutting, overlapping, or ' collapsing. Not effective unless trenched and keyed in, - Not intended for use as mid -slope protection on slopes greater than 4:1(I-i:V; Do not allow water depth to exceed 1.5 ft at any point, ' Implernentatlon General A silt fence is a temporary sediment barrier consisting of filter fabric stretched across and attached to supporting posts, entrenched, and, depending upon the strength of fabric used, supported with'plastic or wire mesh fence. Silt fences trap sediment by intercepting and detaining small amounts of sediment -laden runoff from disturbed areas in order to promote t sedimentation behind the fence, Silt fences are preferable to straw bale barriers in many cases. Laboratory work at the Virginia Highway and Transportation Research Council has shown that silt fences can trap a.much ' higher percentage of suspended sediments than can straw -bales. While the failure rate of silt, fences is lower than that of straw bale barriers, there are many instances where silt fences have been improperly installed. The following layout and installation guidance can improve performance and should be followed: ■ Use principally in areas where sheet��bw occurs. ' ■ Don't use in streams, channels, or anywhere flow is concentrated. Don't use'silt fences to divert flow. ' ■ Don't use below slopes subject to. creep, slumping, or landslides, Select filter fabric -that retains 85% of soil by weight, based on sieve analysis, but that is not finer than an equivalent opening size of 70. ■ Install along a level contour, so water does not pond more than 1.5 ft at anypoint along the ' silt fence, ■ The maximum length of slope draining to any point along the silt fence should be' 200 ft or. less, ' ■ The maximum slopeperpendicular P rP talar to the fence line should be 1:1, . ' 2 of 8 callfornla -stormwater BMP Handbook' January 2003' Construction www,cabmphandtrooks.wm �'�` Silt .Fence SE -I x Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass between the silt fence and toes of slopes or other obstructions, About 1200 ft2 of ponding area should be provided for every acre draining to the fence, ■ Turn the ends of the filter fence uphill to prevent stormwater from flowing around the fence, K Leave an undisturbed or stabilized area immediately down slope from the fence where feasible, ■ Silt fences should remain in place until the disturbed area is permanently stabilized. Design and Layout Selection of a filter fabric is based on soil conditions at the construction site (which affect the equivalent opening size (EOS) fabric specification) and characteristics of the support fence (which affect -the choiee-of tensile strength). The designer should specify a filter fabric that retains the soil found on the construction site yet that it has openings large enough to permit drainage and prevent clogging, The following criteria is recommended for selection of the equivalent opening size: 1. If 5o percent or less of the soil, by weight, will pass.the U.S. Standard Sieve NO. -200, select the EOS to retain 85 96 of the soil. The EOS should not be finer than EOS 70. 2. For all other soil types, the EOS should be no larger than the openings in the U.S. Standard Sieve No. qo except where direct discharge to -a stream, lake, or wetland will occur, then the EOS should be no larger than Standard Sieve -No. ioo. To reduce the chance of clogging, it is preferable to specify a fabric with openings as large as allowed by the criteria. No fabric should be specified with an EOS smaller than U.S. Standard Sieve No. loo; If 85% or mnre-of a soil, by weight, passes through the openings in a No. 200 sieve, filter fabric should not be used. Most of the particles in- such a soil would not be retained if the EOS was too -large and they would clog the fabric quickly if the EOS were small -enough to capture the soil. The fence should be supported by a plastic or wire mesh if the fabric selected does not have sufficient strength and'bursting strength characteristics for the planned application (as recommended by the fabric manufacturer). Filter fabric material should contain ultraviolet inhibitors and stabilizers to provide a minimum of six months of expected usable construction life at a temperature range of o OF to 120 OF, ■ Layout in accordance with attached figures, ■ For slopes steeper than 2:1(H:V) and that contain a high number.of rocks or large dirt clods that tend to dislodge, it maybe necessary to install additional protection immediately adjacent to the bottom of the slope, prior to installing silt fence. Additional protection may be a chain link fence or a cable fence. . r For slopes adjacent to sensitive receiving waters or Environinentally Sensitive Areas (ESAs), silt fence should be used in conjunction with erosion control BMPs. January 2003 Callfornla Stormwater BMP Handbook 3 bf 8. Constructlon www.cabrnphandbooks.com SE -I Silt Fence r Materials Silt fence fabric should be woven polypropylene with a minimum width of 36 in, and a minimum tensile strength of loo lb force, The fabric should conform to the requirements in ASTM designation D4632 and should have an integral reinforcement layer. -The reinforcement layer should be a polypropylene, or equivalent, net provided by the manufacturer, The permittivity of the fabric should be between o,1 sec -1 and 0,15 sec -1 in conformance with the requirements in ASTM designation D4491, Wood stakes should be commercial quality lumber of the size and shape shown on the plans, Each stake should be free from decay, splits or cracks longer than the thickness of the stake or other defects that would weaken the stakes and cause -the stakes to be structurally unsuitable. ■ Staples used to fasten the fence fabric,to the stakes should be .not less than 1' in. long and should be fabricated from 16 gauge or heavier wire; - The wire used to fasten the tops of the stakes together when joining two sections of fence should be 9 gauge or heavier wire. Galvanizing of the fastening wire will not be required. ■ There are new products that may use prefabricated plastic holders for the silt fence and use bar reinforcement instead of wood stakes. If bar reinforcement is used in lieu of wood stakes, use number four orgreatefbar. Provide end protection for any exposed bar reinforcement, Installation Guidelines Silt fences are to be constructed on a level contour, Sufficient area should exist behind the fence for ponding to occur without flooding or overtopping the fence. ■ A trench should be excavated approximately 6'in, wide and 6 in. deep along the line the proposed silt fence. ■ Bottom of the silt fence should be keyed -in a minimum of 12 in, ■ hosts should be spaced a maximum of ft apart and driven securely into the ground a minimum of 18 in. or 12 in. below the �ottom of the trench, When standard strength filter fabric is used, a plastic or wire mesh support fence should be fastened securely to the upslope side of posts using heavy—duty wire staples at least 1 in, long. The mesh should extend into the trench. When extra -strength filter fabric and closer post spacing are *us' d, the mesh support fence may be eliminated. Filter fabric should be purchased in a long roll, then cut to the length of the barrier. When joints are necessary, filter cloth should be spliced together only at a support post, with a minimum -6 in. •overlap and both ends securely fastened to the post. The trench should be backfilled with compacted native materiaL Construct silt.fences with a setback of at least 3 ft from the toe of a slope. Where a silt fence is determined to be not practicable due to specific site conditions, the silt fence maybe constructed at the toe of the slope, but should be constructed as far from the toe of the slope as practicable, Silt fences close to -the toe of the slope will be less effective and difficult to maintain, 4 of 8 Callfornla stormwater 6MP Handbook J . Construction anuary 2003 www,cabmphandbooks. com Silt Fence SE -i .'°•.�� m Construct the length of each reach so that the change in base elevation along the reach does not exceed V3 the height of the barrier; in"no case should the reach exceed Soo ft, Costs ' ■ Average annual cost for installation and maintenance (assumes 6 month useful life); $7 per lineal foot ($85o per drainage acre), Range of cost is $3,50 - $9.10 per lineal foot, ' Inspection and Maintenance ■ Inspect BMPs prior to forecast rain, daily during extended rain events, after rain events, weekly during the rainy season, and at two-week intervals during the non -rainy season. ■ Repair undercut silt fences. ' ■ Repair or replace split, torn, slumping, or weathered fabric. The lifespan of silt fence fabric is generally,5 to 8 months, ■ Silt fences that are damaged and become unsuitable for the intended purpose should be ' removed from the site of work, disposed of, and replaced with new silt fence barriers. ■ Sediment that accumulates in the BMP must be periodically removed in order to maintain BMP effectiveness; Sediment should be removed when the sediment accumulation reaches ' one�third of the barrier height. Sediment removed during.maintenance maybe incorporated into earthwork on the site or disposed at an appropriate location. =? ■ . Silt fences should be left in place until the upstream area is permanently stabilized' Until =`y then, the silt fence must be inspected and maintained. It Holes, depressions, or other ground disturbance caused by the removal of the silt fences should be back%lled and repaired, References Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area • Governments, May 1995• National Management Measures to Control Nonpoint Source Pollution from Urban Areas, ' United States Environmental Protection Agency, 2002, Proposed Guidance SPecifying Management Measures for Sources of Nonpoint-Pollution in ' Coastal Waters, Work Group -Working Paper, USEPA, April 1992.. Sedimentation and Erosion -Control Practices, and Inventory. of Current Practices (Draft), 1 UESPA, 1990, Southeastern Wisconsin Regional Planning Commission (SWRPC), Costs of Urban Nonpoint Source Water Pollution Control Measures, Technical Report No, 31. Southeastern Wisconsin Regional Planning Commission, Waukesha, WI, 1991. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department'of Transportation (Caltrans), November 2000. ' January 2003 Callfornla Stormwater BMP Handbook Construction 5of8 wWw.cabmphandbooks.com SE -1 Silt Fence Stormwater Management Manual for The Puget Sound Basin; Washington State Department of Ecology, Public Review Draft,,1991, U,S, Environmental Protection Agency (LTSEPA), Stormwater.Management for Industrial Activities: Developing Pollution Prevention Plans and Best Management Practices, US, Environmental Protection Agency, Office of Water, Washington, DC, 1992. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988. 6 of.8 California Stormwater BMP Handbook January 2003 Constructlon www, cabmphand600ks, com at c � K � g 0 v'rA 7 C ��-t .00 � o 3 r�Ci v O N 3 n Or 0 0 Max red'ch = 500' See note 1 Optional. maintenance Cross barrier' - opening detail (See note 10) 8" Fabric A Cross barrier Toe of slope v j PLAN �j SILT FENCE NOTES 1- Construct the length of each reach so that the chonge in base elevation along the reach does• not exceed 113 the height of the linear barrier• in no case shall the reachlength exceed 500'. 2. The. lost 8'-0" of fence shall be turned up slope. 3. Stoke dimensions are nominal. 4. Dimension may vary to fit field condition. 5. Stokes shall be spaced at 8'-0* maximum and shall be positioned on downstream side of fence. .6.. Stokes' to overtop. and fence fobr4c to foI6 oround each stake one full turn. Secure fabric to stake with 4 staples. 7. Stakes shall be driven tightly together to prevent potential flow—through .of sediment at Joint. The tops of the stakes shall be securedwith wire. 8. For end stake. fdnce fabric shalt be folded around two stakes one full tum and secured with 4 staples. 9. Minimum 4 staples per stake. Dimensions -shown ate typical. 10. Cross barriers shall be a minimum of 113 and a maximum of 1/2 the height of the linear barrier. 11. Maintehonce openings shall be constructed In a manna to ensure sediment remains behind slit fence. 12. Joining sections shall not be placed at sump locations. 13. Sandbag rows and loyers, shall be offset to eliminate gaps. LEGEND 'w Tomped backfill Imo■ Slope direction Direction of flow Wood M stoke Fabric n W 0 N End detail Silt fence I IF rui C Toe of slope ut CROSS BARRIER DETAIL Sandbags See no 10 Vl rn. SECTION' C—C of Setback varies (See note 4) *B�See, ic section B Stokenotes 6. 7 & 12) LEGEND Fabric Z- % 2" Wood stake toke A Tamped bcti rill (See'notes 3 & 5) Slope direCtiOn Toe or slope ^^^- Direction of, flow Fabric section A Slope .(See notes 6. 7 . see detollA JOINING SECTION DETAIL (TOP MEW) n 2' x 2' wood stake 1/16" ., Fabric ( note 3) diameter (Sea note67. 8) t 2" SECTION A—A END. STAKE DETAIL (TOP VIEW) STAPLE DETAIL (SEE NOTE 9) Sill fence2 2 wood stake —i fabric End stoke (See note 2) /—Fabric DETAIL A END DETAIL e End stoke Toe of slope End stake--/Sondbogs (2-loyers high) ji OPTIONAL MAINTENANCE OPENING DETAIL (SEE NOTE 11) (A • Fiber Rolls SE -5 Objectives EC Erosion Control ✓ SE Sediment Control �f TC Tracking Control WE Wind Erosion Control Ns Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Description and Purpose A fiber roll corisists of straw, flax, or other. similar materials bound into a tight tubular roll. When fiber rolls are placed at the toe and on the face of slopes, they intercept runoff, reduce its flow velocity, -release the runoff as. sheet flow, and provide removal of sediment from the runoff. By interrupting the length of a slope, fiber rolls can also reduce erosion. ' Suitable Applications Fiber rolls maybe suitable; ■ Along -the toe, top, face, and at grade breaks of exposed and erodible slopes to shorten slope length' and spread runoff as sheet flow ' ■ At the end of a downward slope where it transitions to a steeper slope ■ Along the perimeter of a project ' ■ As check dams.in unlined ditches Legend; ✓ Primary Objective ✓ Secondary Objective Targeted Constituents Sediment Nutrients Trash ' Metals Bacteria 011 and Grease Organics Potential Alternatives SE -1 Sift Fence SE -8 Gravel Bag Berm SE -8 Sandbag Barrier SE -9 Straw Bale Barrier ' ■ . Down-slope of exposed soil areas ■ Around temporary stockpiles ' Limitations ■ . Fiber rolls are not effective unless trenched ASQA ' alifom1a ' 8tormwater ezUOY ' Association January 2003 Callfornla Storrnwater BMP Handbook . l of 4 Constructlon ' www,cabmphandbooks:com SE -5 Fiber Rolls ■ Fiber rolls at the toe of slopes "greater than 5:1 jH:V) should be a minimum of 20 in, diameter or installations achieving the same protection (i.e, stacked smaller diameter fiber rolls, etc,), ■ Difficult to move once saturated, ■ If not properly staked and trenched in, fiber rolls could be transported by high flows. ■ Fiber rolls have a very limited sediment capture zone. ■ Fiber rolls should not be used on slopes subject to creep, slumping, or landslide. Implementation Fiber Roll Materials ■ Fiber rolls should be either prefabricated rolls or rolled tubes of erosion dontrol blanket. Assembly q f.Field Rolled FYber Roll ■ Roll length of erosion control blanket into a tube of minimum g in, diameter. ■ Bind roll at each end and every 4 ft along length of roll with jute -type twine, . Installation ■ Locate fiber rolls on level contours spaced as follows: Slope inclination of 4:1 (HN) or flatter: Fiber rolls should be placed at a maximum interval of 20 ft. t - Slope inclination between 4:1 and 2:1 (H:V): Fiber Rolls should be placed at a.maximum interval of i, ft. (a closer spacing is more effective). Slope inclination 2:1(HN). or greater: Fiber Rolls should be placed a# a maximum ' interval of 10 ft. (a closer spacing is more effective). ■ Turn the ends of the fiber roll up slop`s to prevent runoff from going around the roll. ' ■ Stake fiber rolls into a.2 to 4 in, deep trench with a width equal to the diameter of the fiber roll. ' - Drive stakes. at the end of each fiber roll and spaced 4 ft maximum on center, - Use wood stakes with a nominal classification of o.75 by 0.75 iii, and minimum length of. ' 24 in, ■ If more than one fiber roll is placed in a row, the rolls should be overlapped, not abutted, ' Removal K Fiber rolls are typically left in place.. ' 2 of 4 Ca Ilfornia stormwater BMP Handbook January 2003 Construction ' www,cabmphandbooks.com Fiber Rolls SE -5 a If fiber rolls are removed, collect and dispose of sediment accumulation, and fill and compact holes, trenches, depressions or any other ground disturbance to blend with adjacent ground, ' Costs Material costs for fiber rolls range from $2o - $3o per 2-5 ft roll, tInspection and Maintenance Inspect BMPs prior to forecast rain, daily during extended rain events, after rain events, weekly during the rainy season, and at two-week intervals during the non -rainy season. ' a Repair or replace split, torn, g um iunraveling 1? , or slumping fiber rolls. ' ■ If the -fiber roll.is used as a sediment capture device, or.as an eFosiQn control.device to maintain sheet flows, sediment that accumulates in the BMP must be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when sediment t accumulatioii reaches one-half the designated sediment storage depth, usually one-half the distance between the top of the fiber roll and the adjacent ground surface.. Sediment removed during maintenance maybe incorporated into earthwork on the site of disposed at an -appropriate location. ■ If fiber rolls are used for erosion control, such as in a mini check dam, sediment removal should not be required as long as the system continues to control the grade. Sediment control BMPs will likely be. required in conjunction with this type of application. References Stormwater Qudlity Handbooks - Construction Site Best Management Practices (BMPs) Manual, I) State of California'epartment of Transportation (Caltrans), November.2000. lanuary 2003 Callfornla Stormwater BMP Handbook 3 of 4 -Construction www. ca6mphandbooks -corn SE -5 Fiber'Rolls . y .� [k y �,�%%,�,�,�,1fJ'�' Note: y , �i�i�i�i�i�i� Install fiber roll y�i���i��' y r r , I along o level contour. lo e —V lo Ill y . I y Fiber rolls moo+ I y � r •. i • y y � � i �ii'i'i'�i �' Vertical spacing i'i'i�i'i'iri'�J measured along the -/ face of the slope.' '.''' II y varies between 10' ,and 20' Install o fiber roll near I I slope where It transitions y into o steeper slope TYPICAL FIBER ROLL INSTALLATION N. T. S. SlopeFiber roll vorre ,.,�M ENTRENCHMENT DETAIL . N.J. S. 4 of 4 California Stormwater BMP Handbook January 2003 Construction www.cabmphandbboks.com Gravel Bag Berm Standard Symbol BMP Objectives o Soil Stabilization • Sediment Control o Tracking, Control o Wind Erosion Control o Non -Storm Water Management o Materials and Waste Management Definition and A gravel bag berm consists of a single row of gravel bags that are installed end to Purpose end to form a barrier across a slope to intercept runoff, reduce its flow velocity, release the runoff as sheet flow and provide.some sediment removal. Gravel bags can be used where flows are moderately concentrated, such as ditches, swales, and storm drain inlets (see BMP SC -10, Storm Drain Inlet Protection) to divert and/or detain flows. Appropriate ■ BMP maybe implemented on a project -by -project basis with other BMPs Applications when determined necessary and feasible by the RE. ■ Along streams and channels. ■ Below the toe of exposed and erodible slopes. ■ Down slopo of exposed soil areas. ■ Around stockpiles. ■ Across channels to serve as a barrier for utility trenches or provide a temporary channel crossing for construction equipment, to reduce stream impacts. ■ Parallel to a roadway to keep sediment off paved areas. ■ At the top of slopes to divert roadway runoff away from disturbed slopes. ■ Along the perimeter of a site. ■ To divert or direct flow or create a temporary sediment basin. ■ During construction activities in stream beds when the contributing drainage C Caltrans Storm Water Quality Handbooks Section 4 Construction -Site Best Management Practices Manual Gravel Bag Berm SC -6 arASwrc March 1, 2QP3 1 of 3 � Gravel Bag Berm SC -6 area is less than 2 ha (5 ac), n. When extended construction period limits the use of either silt fences or straw_ bale barriers. ■ When site conditions or construction sequencing require adjustments or relocation of the barrier to meet changing field conditions and needs during ' - construction. ■ At grade breaks of exposed and erodible slopes to shorten slope length and ' spread runoff as sheet flow. Limitations ■ Degraded gravel bags may rupture when removed, spilling contents. ' ■ Installation can be labor intensive. ■ Limited durability for long term projects. ' ■ When used to detain concentrated flows, maintenance requirements increase. Standards and Materials Specifications m Bag Material: Bags shall be woven polypropylene, polyethylene or polyamide fabric, minimum unit weight 135 g/m2 (four ounces per square ' .yard), mullen burst strength exceeding 2,070 kPa (300 psi) in conformance with, the requirements in ASTM designation D3786, and ultraviolet stability exceeding 70% in conformance with the requirements in ASTM designation. D4355. ■ Bag Size: Each gravel -filled bag shall have a length of 450 mm (18 in), width of 300 mm (12 in), thickness of 75 mm (3 in), and mass of approximately ' 15 kg (33 lb). Bag dimensions are nominal, and may vary based on locally available materials: Alternative bag sizes shall be submitted to the RE for approval pnor to deployment. ' ■ Fill Material: Gravel shall be between 10 mm and 20 mm 0.4 and 0.8 inch in diameter, and shall be clean and free from clay balls, organic matter; and ' other deleterious materials. The opening of gravel -filled bags shall be between 13 kg and 22 kg (28 and 48 lb) in mass. Fill material is subject to approval by the RE. ' Installation ■ When used as a linear control for sediment removal: — Install along a level contour. I— Turn ends of gravel bag row up slope to prevent flow around the ends. — Generally, gravel bag barriers shall be used in conjunction with temporary ' soil stabilization controls up slope to provide effective erosion and sediment Caltrans Storm Water Quality Handbooks Section 4 Construction Site Best Management Practices Manual Gravel Bag Berm SC -6 ' agl ww March 1, 20.p3 2 of 3 1. � Gravel Bag Berm. SC -6 control, ■ When used for concentrated flows: — Stack gravel bags to required height using a pyramid approach. — Upper rows of gravel bags shall overlap joints in lower rows, ' ■ Construct gravel bag barriers with a set -back of at least lm from the toe of a slope. Where it is determined to be not practicable due to specific site ' conditions, the gravel bag barrier may be constructed at the toe of the slope, but shall be constructed as far from the toe of the slope as practicable. ' ■ Requires Certificate of Compliance per Standard. Specifications 6-1.07. Maintenance and ■ Inspect gravel bag berms before and after each rainfall event, and weekly Inspection throughout the rainy season. ■ Reshape or replace gravel bags as needed, oras directed by the RE. t■ Repair washouts or other damages as needed, or as directed by the RE. ■ Inspect gravel bag berms for sediment accumulations and remove sediments when accumulation reaches one-third of the berm height. Removed sediment shall be incorporated in the project at locations designated by the RE or disposed of outside the highway right-of-way in conformance with the Standard Specifications. ■ Remove gravel bag berms when no longer needed. Remove sediment accumulations and clean, re -grade, and stabilize the area. Caltrans Storm Water Quality Handbooks Section 4 i Construction Site Best Management Practices Manual Gravel Bag Berm SC -6 aWhw March 1, 2`443 3 of 3 Street Sweeping and Vacuuming SC -7 SSV Standard Symbol BMP Objectives • Soil Stabilization • Sediment Control • Tracking- Control o Wind Erosion Control o Non -Storm Water Management o Materials and Waste Management Definition and Practices to remove tracked sediment to prevent the sediment from entering a Purpose storm drain or watercourse. Appropriate These practices are implemented anywhere sediment is tracked from the project Applications site onto .public or private paved roads, typically at points of ingress/egress. Limitations Sweeping and vacuuming may not be effective when soil is wet or muddy. ' Standards and ■ Kick brooms or sweeper attachments shall not be used. Specifications o Inspect potential sediment tracking locations daily. ' ■ Visible sediment tracking shall be swept and/or vacuumed daily. ■ If not mixed with debris or trash, consider incorporating theremoved sediment back into the project. Maintenance and ■ Inspect ingress/egress access points daily and sweep tracked sediment as Insp6ciion needed, or as required by the Resident Engineer (RE). ' ■ Be careful not to sweep up any unknown substance or any object that maybe potentially hazardous. ' ■ Adjust brooms frequently; maximize efficiency of sweeping operations. ■ After sweeping is finished, properly dispose of sweeper wastes at an approved ' dumpsite in conformance with the provisions in Standard Specifications Section 7-1.13 . ' Caltrans Storm Water QualityHandbooks dbooks Section 4 i� Construction Slte Best Management Practices Manual Street Sweeping and Vacuuming SG -7 ' aV6=w March 1, 2003. 1 of 1 Straw Bale Barrier SC -9 i `tel:, i <e E `2m11��%Soca Standard Symbol BMP Objectives o Soil Stabilization • Sediment Control o Tracking Control o Wind Eroslon Control o Non -Storm Water Management o Materials and Waste Management Definition and A straw bale barrier is a temporary linear sediment barrier consisting of straw Purpose bales, designed to intercept and slow sediment -laden sheet flow runoff. Straw bale barriers allow sediment to settle from runoff before water leaves the construction site. • Appropriate, ■ This BMP may be implemented on a project -by -project basis in addition to ' . Applications other BMPs when determined necessary and feasible by the Resident Engineer (RE). ' ■ Along the perimeter'of a site. ■ Along streams and channels. ' ■ Below the. toe of exposed and erodible. slopes. p ■ Down slope of exposed soil areas. ■ Around stockpiles. ■ Across minor swales or ditches with small catchments. ' ■ Around above grade type temporary concrete washouts (See BMP WM-8, "Concrete Waste Management"). ' ■ Parallel to a roadway to keep sediment off paved areas. t AWCaltrans Storm Water Quality Handbooks Section 4 Construction Site Best Management Practices Manual Straw Bale Barrier S0.9 ' March 1;.2GQ3 1 of 5 Straw Bale Barrier SC -9 ' Limitations ■ Installation can belabor intensive, ■ Straw bale barriers are maintenance intensive. a Degraded straw bales may fall apart whenremoved or left in place for extended periods. ■ Can't be used on paved surfaces, ' ■ Not to be used for drain inlet protection. ■ Shall not be used in areas of concentrated flow. w Can be an attractive food source for some animals. ' ■ May introduce undesirable non-native plants to the area. Standards and Materials ' Specifications n Straw Bale Material: Straw bale materials shall conform to the provisions in Standard Specifications Section 20-2.06, "Straw." t■ Straw Bale Size: Each straw bale shall be a minimum of 360 mm (14 in) wide, 450 mm (18 in) in height, 900 mm (36 in) in length and shall have a minimum mass of 23 kg (51 lb.) The straw bale shall be composed entirely of vegetative matter, except for the binding material. ■ Bale Bindings: Bales shall be bound by either steel wire, nylon or polypropylene string placed horizontally. Jute and cotton binding shall not be used. Baling wire shall be a minimum diameter of 1.57 mm (0.06 inch). Nylon or polypropylene string shall be approximately 2 mm (0.08 inch) in ' diameter with a breaking strength of 360 N. ■ Stakes: Wood stakes shall be commercial quality lumber of the size and shape shown do the plans. Each stake shall be free from decay, splits or cracks longer than the thickness of the stake, or other defects that would weaken the stakes and cause the stakes to be structurally unsuitable. Steel bar ' reinforcement shall be equal to a number four designation or greater. End protection shall be provided for any exposed bar reinforcement. ' Installation ■ Limit the drainage area upstream of the barrier to 0.3 ha/100 m ' (0.25 ac/100ft) or barrier: ii Limit the slope length draining to the straw bale barrier to 30 m (100 ft.) Caltrans Storm Water Quality Handbooks section 4 ' it Construction Site Best Management Practices Manual Straw Bale Barrier SC -9 aroma March 1, JP3 2 of 5 � Straw Bale Barrier SC -9 ■ Slopes of 2:100 (V:M (2%) or flatter are preferred. If the slope exceeds 1:10 (VE) (10%), the length of slope upstream of the barrier must be less than 15 m (50 ft). a Install straw bale barriers along a level contour, with the last straw bale turned up slope. ■ Straw bales must be installed in a trench and tightly abut adjacent bales. ■ Construct straw bale barriers with a set -back of at least 1 m (3 ft) from the toe of a slope. Where it is determined to be not practical due to specific site conditions, the straw bale barrier may be constructed at the toe of the slope, but shall be constructed as far from the toe of the slope as practical. ■ See pages 4 and 5 of this BMP for installation detail. Maintenance and ■ Inspect straw bale barriers before and after each rainfall event, and weekly Inspection throughout the rainy season. ■ Inspect straw bale barriers for sediment accumulations and remove sediment when depth reaches one-third the barrier height. Removed sediment'shall be incorporated in the project at locations designated by the RE or disposed of . outside the highway right-of-way in conformance'with the Standard Specifications. ■ Replace or repair damage bales as needed or as directed by the RB. ■ Repair washouts or other damages as needed or as directed by the RE. 1 ■ Remove straw bales when no longer needed. Remove sediment accumulation, and clean, re -grade, and stabilized the area. 1 Caltrans Storm Water Quality Handbooks Section 4 construction Site Best Management Practices Manual Straw Bale Barrier SC -9 &bwto March 1, 2Q03 3 of 5 LEGEND DIRECTION OF FLAW SANDBAG CROSS BARRIER See note 8 Setback varies (See note 3) 50x50 Wood slake (See note 4) Straw bale barrier Slope Toe of slope See note 6 See n —V SECTION B -B ___ m__j . inn . r nvr ILZ wood stake toward usly laid bale ole 7) ale binding STATE or CALIFORNIA DEPARTMENT IF TRANSPORTATION TEMPORARY LINEAR SEDIMENT BARRIER (TYPE STRAW BALE) NO SCALE ALL DIMENSIONS ARE IN MIwMETERS DNIESS OTHERWISE SHOWN El EJ FD MIN Straw Bale Barrier SC -9 N his z I Odol$ d a p F rn d o ' D s m L N Caltrans Storm Water Quality Handbooks Sectlon 4 Construction Site Best Management Practices Manual Straw Bale Barrier SC -9. March 1, 20p3 5 of 5 t _m L m ° E V L L mL N d L m Lr L D y K m uN� dim y j — m C B E — d al m um 0 Y w V m °no e .`o m ' L 0L v c:5 O CV s d fi m ti vL V D u e m D n m y e°do W b E .xD m m o V^^ C p- wtww [ > m?� m C 9 m O O ys m mmD 'O L� 0 C $oE O E m o avis y my i0 2�L m W e c m E E; 2 ,a$° w. LLL EO v° O qo zry Q Pel H,W o R Z a W a ¢ Z N m C G m 0Z �m w 3 Q is v ° c u ~ V) u o c mz .1 c aZ Q 1 -- Li LiZ UJ a y J V � m a ° � v 0 co W 0 o E -a 0 - 'a a DW m w d a p F rn d o ' D s m L N Caltrans Storm Water Quality Handbooks Sectlon 4 Construction Site Best Management Practices Manual Straw Bale Barrier SC -9. March 1, 20p3 5 of 5 Storm Drain Inlet -Protection SE -10 Description and Purpose Storm drain inlet protection consists of a sediment filter or an impounding area around or upstream of a storm drain, drop inlet, or curb inlet. Storm drain inlet protection measures temporarily pond runoff before it enters the storm drain, allowing sediment to settle. Some filter configurations also remove sediment by filtering, but usually the ponding action results in the.greatest sediment reduction. Suitable Applications Every storm drain inlet receiving sediment -laden runoff should be protected. Limitations ■ Drainage area should not exceed 1 acre, ■ Strawbales, while potentially effective, have not produced. in practice satisfactory results, primarily due to improper in.St�llatibn, ■ Requires an adequate area for water to pond without . encroaching into portions of.the roadway subject to traffic. ■ 'Inlet protection usually requires other mefhods of temporary protection to prevent sediment -laden stormwater and.non-stormwater discharges from entering the storm drain system, Sediment removal maybe difficult in high flow conditions or if runoff is heavily.sediment laden, If high flow conditions are Objectives EC Erosion Control SE Sediment Control ✓ TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollutlon Control Legend: Primary Objective ✓ Secondary Objective Targeted Constituents Sediment ✓ Nutrients Trash Metals Bacteria Oil and Grease organics - Potential Alternatives SE -1 Slit Fence SE -5 Fiber Rolls SE -6 Gravel Bag Berm SE -8 Sandbag Barter SE -9 Straw Bale .Barrier CASQA Californla Stormwater duality Association )anuary 2003 California Stormwater BMP Handbook 1 of 9. Construction www,cabFnphandbboks.com SE -10 Storm Drain Inlet Protection' expected, use other onsite sediment trapping techniques in conjunction with inlet ' protection. ' .. Frequent maintenance is required. ■ For drainage areas larger than i acre, runoff should be routed to a sediment -trapping device designed for larger flows, See BMPs SE -2, Sediment Basin, and SE -3, Sediment Traps, ' ■ Excavated drop inlet sediment traps are appropriate where relatively heavy flows are expected,'and overflow capability is needed, Implementation General ' Large amounts of sediment may enter the storm drain system when storm' drains are installed. before the upslope drainage area is stabilized, or wliere construction is adjacent to an existing storm drain. In cases of extreme sediment loading, the storm drain itself may clog and lose a ' major portion of its capacity. To avoid these problems, it is necessary to prevent sediment frbfn entering the system at the inlets. Inlet control measures presented in this handbook should not be used for inlets draining more ' than one acre. Runoff from larger disturbed areas should be first routed through SE -2, Sediment Basin or SE-3,•Sediment Trap. Different types of inlet protection are appropriate for different applications depending onsite conditions and the type of inlet. Inlet protection methods not presented in this handbook should be approved by the local stormwater management agency. be" sign. .and Layout ' Identify existing and planned storm drain inlets that have the potential to receive sediment - laden surface -runoff, - Determine if storm drain inlet protection is needed and which method to use. ' ■ Limit upstream drainage area to i acre maximum. For larger drainage areas, use SE -2, Sediment Basin, or SE -3, Sediment,Ixap, upstream of the inlet protection device. ' ■ The key to. successful -and safe use of storm drain inlet protection devices is to know where `runoff will pond or be diverted. - Determine the acceptable location and extent of ponding iii the vicinity of the drain inlet. ' The acceptable location and extent of ponding will influence the type and design of the storm drain inlet protection device, t- Determine the extent of potential runoff diversion caused by the storm drain inlet protection device. Runoff ponded by inlet protection devices may flow around the device and towards the next downstream inlet, In some cases, this is acceptable; in other cases, ' serious erosion or downstream property damage can be caused by these diversions. The possibility of runof -diversions will influence whether or not storm drain inlet protection is suitable; and, if suitable, the.type and design of the device. ' ■ The location and extent ofondin and th p g, a extent of diversion, can usually be controlled through appropriate placement of the inlet protection device. In some cases, moving the 2 of 4Ca . Ilfornia Stormwater BMP Handbook January 2003 Construction ' www.cabmphandtiooks.com Storm Drain inlet Protection SE -10 inlet protection device'a short distance upstream of the actual inlet can provide more, efficient sediment control, limit ponding to desired areas, and prevent.or control diversions, s Four types of inlet protection are presented below, However, it recognized that other effective methods and proprietary devices exist and maybe selected, Filter Fabric Fence; Appropriate for drainage basins with less than a 5% slope, sheet flows, and flows under 0,5 cfs, - Excavated Drop Inlet Sediment Trap: An excavated area around the inlet to trap sediment (SE -3). Gravel bag barrier: Used to create a small sediment trap upstream of inlets on sloped, paved streets. Appropriate for sheet flow or when concentrated flow may exceed o,5 cfs, and where overtopping is required to prevent flooding, - Block and Gravel Filter: Appropriate for flows greater than o.5 cfs, ■ 'Select the appropriate type of inlet protection and design as referred to. or as described in this fact sheet. ■ Provide area around the inlet for water to pond without flooding structures.and property. ■ Grates and spaces around all inlets should be sealed to prevent seepage -of sediment -laden water, ■ Excavate sediment sumps (where needed)1 to 2 ft with 2:1 side slopes around the. inlet. Installation DI Protection Type z - F`Elter Fabric Fence - The filter fabric fence (Type 1) protection is shown in the attached figure. Similar to constructing a silt fence,. see BMP SE -1, Silt Fence, Do not place filter fabric underneath the inlet grate since the collected sediment may fall into the drain inlet when the fabric is removed or replaced, 1. Excavate a trench approximately 6 in. wide and -6 in, deep along the line of the silt fence inlet protection device. 2. Place 2 in: ' by 2 in, wooden stakes around the perimeter .of the inlet a maximum of 3 ft apart and drive them. at least 18 in, into the ground or 12 in, below the bottom of the trench. The stakes must be at least 48 in, 3. Lay fabric along bottom of trench, up side of trench, and then up stakes, See SE -i, Silt ' Fence, for details.. The maximum silt fence height around the inlet is 24 in. 4. Staple the filter fabric (for materials and specifications, see SE -i, Silt Fence) to wooden stakes. Use heavy-duty wire staples at least x in,* in length, 5. 'Backfill the trench with gravel or compacted earth all the way around, ■ DI Protection Type 2 - Excavated Drop InletSediment TrdP - The excavated drop inlet sediment trap (Type 2) is shown in the attached figures,' Install filter fabric fence in ' )anua 2003 rY California Stormwater BMP Handbook 3 of 9 Constructlon twww,cabmphandbooks,com . SE -10 Storni Drain Inlet Protection accordance with DI Protection Type 1. Size excavated trap to provide a minimum storage capacity calculated at the rate 67 yd3/acre of drainage area, ■ DI Protection Ttjpe 3 - Gravel bag - The gravel bag barrier (Type 3) is shown in the figures. Flow from a severe storm should not overtop the curb, In areas of high clay and silts; use filter fabric and gravel as additional filter media, Construct gravel bags in accordance with SE -6, Gravel Bag Berm. Gravel bags should be used due to their high permeability, i, Use sandbag made of geotextile fabric (not burlap) and fill with 0,75 in. rock oro, 25 in. pea gravel. 2. Construct on gently sloping street. 3. • -Leave room upstream of barrier for water to pond and sediment to settle. 4. Place several layers of sand bags = overlapping the bags and packing them tightly ' together, 5, Leave gap of one bag on the top row to serve as a spillway. Flow from a severe storm (e.g., io year storm) should not overtop the curb. a DIProtection Type 4 - Block and Gravel Ml ter - The block and gravel filter C�Pe 4) is shown in the figures, Block and gravel filters are suitable for curb inlets commonly used in residential, commercial, and industrial construction, 1. Placehardware cloth or comparable wire mesh with o.5 in. openings over the drop inlet so that the wire extends a minimum of 1 ft beyond each side of the inlet structure. If more than one.strip is necessary, overlap the strips. Place filter fabric over the wire mesh, 2. ' Place concrete blocks lengthwise on their sides in a single row around the perimeter of the inlet, so that the open ends face outward, not upward. The ends of adjacent blocks should abut. The height of the ba'- er can be varied, depending on design needs, by ' stacking combinations of blocks that are 4 in., 8 in., and 12 in. wide. The row of blocks should be at least 12 in. but no greater than 24 in, high. 3. Place wire mesh over the outside vertical face (open end) of the concrete blocks to ' prevent stone from being washed through the blocks. Use hardware doth'or comparable wire mesh'with o.5 in. opening. t4. Pile washed stone against the wire mesh to the top of the blocks. Use 0.75 to 3 in, Costs ■ 'Average annual cost for installation and maintenance (one year useful life) is $200 per inlet. Inspection -and Maintenance Inspect BMPs prior to forecast rain, daily during extended rain events, after rain events, weekly during the rainy season, and at two-week intervals during the non -rainy season, 4 of 9 California Stormwater BMP Handbook January. 2003 Construction ' www.cabrnphandbooks,com SE AO Storm Drain Inlet Protection accordance with DI Protection Type i. Size excavated trap to provide a miminumstorage capacity calculated at the rate 67 yd3/acre of drainage area, ■ DI Protection Type 3 - Gravel bag - The gravel bag barrier (Type 3) is shown in the figures, Flow from a severe storm should not overtop the curb. In areas of high clay and silts, use filter fabric and gravel as additional filter media, Construct gravel bags in accordance with SE -6, .Gravel Bag Berm, Gravel bags should be used due to their high permeability. 1. Use sandbag made of geotextile fabric (not burlap) and fill with 0,75 in. rock or0,25 in. pea gravel, 2. Construct on gently sloping street. 3. - Leave room upstream of barrier for water to pond and sediment to -settle. 4, Place several layers of sand bags -- overlapping the bags and packing them tightly ttogether, 5. Leave gap of one bag on the top row to serve as a spillway. Flow from a severe storm (e.g., io year storm) should not overtop the curb. ■ DI Protection 7)1pe 4 — Block and Gravel I+3.Iter - The block and gravel filter is shown in the es. Block and C�'Pe 4) gravel filters are suitable for curb inlets commonly used in residential, commercial, and industrial construction, i. Place hardware cloth or comparable wire mesh with o.5 in, openings over the drop inlet so that the wire extends a minimum of i ft beyond each side of the inlet structure. If more than one.strip is necessary, overlap the strips. Place filter fabric over the wire mesh. 2. Place concrete blocks lengthwise on their sides in a single row around the perimeter of ' the inlet, so that the open ends. face outward, not upward, The ends of adjacent blocks should abut. The height of the bagier can be varied, depending on design needs, by ' stacking combinations of blocks that are 4 in,, 8 in., and 12 in. wide. The row of blocks' should be at least 12 in, but no greater than 24 in. high, 3. Place wire mesh over the outside vertical face (open end) of the concrete blocks to ' prevent stone from being washed through the blocks. Use hardware doth'or comparable wire mesh with o.5 in, opening, 4. Pile washed stone against the wire mesh to the top of the blocks, Use 0,75 to 3 in, ' Costs ■ 'Average annual cost for installation and maintenance (one year useful life) is $200 per inlet, Inspection and Maintenance • Inspect BMPs prior to forecast rain, daily during.extended rain events, after rain events, ' weekly during the rainy season, and at two-week intervals during the non -rainy season, ' 4 of 9 California Stormwater BMP Handbook January. 2003 Constructlon ' www,cabmphandbooks,com Storm Drain Inlet Protection SE -10 ' R Ater Fabric Fences. If the fabric becomes clogged, torn, or degrades, it should be replaced. Make sure the stakes are securely driven in the ground and are in good shape (i.e., not bent, cracked, or splintered, and are reasonably perpendicular*to the ground). Replace damaged ' stakes. Gravel Filters. If the gravel becomes clogged with sediment, it must be carefully removed ' from the inlet and either cleaned or replaced. Since cleaning gravel at a construction site maybe difficult, consider using the sediment -laden stone as fill material and put fresh stone around the inlet. Inspect bags for holes, gashes, and snags, and replace bags as needed. ' Check gravel bags for proper arrangement and displacement. ■ Sediment that accumulates in the BMP must be periodically removed in order to maintain BMP effectiveness. Sediment should be removed when the sediment accumulation reaches one-third of the barrier height. Sediment renioved during-mainteinance.may.be.incorporatecl into earthwork on the site ore disposed at an �app'ropriate location. ' : Remove storm drain inlet protection once the drainage area is stabilized. Clean and regrade area around the inlet and clean the inside of the storm drain inlet as it must be free of sediment and debris at the time of final inspection. ' References Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs). Manual, ' State of California Department of Transportation (Caltrans);'November 2000. Stormwater Management Manual for The Puget Sound Basin, Washington State Department of Ecology, Public Review Draft, 1991. January 2003 CaRfornla Stormwatee BMP Handbook 5 of 9 Constructlon www.cabinphandbooks-com SE -10 Storm Drain Inlet Protection L -Sheet 'flow Less. than 1 acre �o NOTES: SECTION A- A llDrain inlet I I ' PLAN It Fence per SE -01 5" Min overlap at ends• of silt fence. —-Geotextlle Blanket Silt Fence. per SE -01 DI PROTECTION TYPE 1 NO SC L 1. For use in areas where- grading has been completed and final soil stabilization and seeding ore pending. 2. Not applicable. in paved 'areas. 3. Not opplicoble with concentroted .flows.. W9 9 Callfornla Stormwater BMP Handbook. -January 2003 Cbnstructlon :1�I, www.cabmphandbooks, corn Storm Drain Inlet Protection SE -10 Stobilize oreo and grade uniformly around perimeter .1 Geotextile x X Blanket —Silt fence Per SE -01 X 1:1 slope-\ I 3 Min • �r �r Note: Remove sediment before reaching one-third full. Section A—A Concentrated flow r-------------'------1 i- - - - - - -- i Sheet flow* ; X y� X L - - - --- - - - - - - - -- --- - - J X X X X 12" Min 24" Max 4. Rock filter(use if flow is concentrated) Edge of sediment trap -Drain inlet =Geotextile Blanket —Silt fence Per SE-01- Plan E-01- Plan co cor O f DI PROTECTION TYPE 2 'NOT TT 5CALL Notes 1. For use in .cleared and grubbed and in graded areas. 2. Shape basin so that longest inflow area faces longest length of trop 3. For concentrated flows, shape basin in 2: 1 ratio with length oriented towards direction of flow. January 20D3 Callfornfa Stortnwater BMP Handbook 7 of 9 Constructlon :j, wwwlcabmphandbooks.com SE -10• Storm Drain Inlet Protection gs 2—bogs high TYPICAL PROTECTION FOR INLET ON SUMP Edge of Povement r-Inle Flow Flow Spillway,-1—bag high \_-Sandbags 2—bags high TYPICAL PROTECTION FOR INLET ON GRADE . NOTES: 1. Intended for short—term use. 2. Use to inhibit non—storm water flow. 3. Allow for., proper maintenance and cleanup. 4. Bags must be removed ofter.adjocent operation is completed 5. Not opplicoble ih. areas with high silts and cloys 'without filter fobric. DI PROTECTION TYPE 3 NOT JO 5CTCE7_ 8 of 9 California Stormwater BMP Handbook January 2003 Construction 411, www.,cabmphanc(books.com Storm Drain Inlet. Protection . SE -10 Curti inlet O Concrete block laid --J lengthwise on sides perimeter of opening Runoff with sediment O Overflow 12"- 2 4 2"-24 I IUI UYVUI C UUUI wire mesh Hardware cloth or wire mesh Di PROTECTION - TYPE 4 NOT TO SCALE Filtered water Curb 'inlet January 2003 Callfornla Stormwater BMP Handbook 9 of 9 Construction www,cabmphandbooks,com Preservation of Existing Vegetation Q�J Standard Symbol BMP Objectives Soil Stabilization • Sediment Control o Tracking Control o Wind Erosion Control • Non -Storm Water Management o Materials and Waste Management Definition and Preservation of existing vegetation is the identification and protection of desirable Purpose vegetation that provides erosion and sediment control benefits. Appropriate ■ Preserve existing vegetation at areas on a site where no construction activity is Applications planned or will occur at a later date. Specifications for preservation of existing vegetation can be found in Standard Specifications, Section 7-1.11. ■ On a year-round basis, temporary fencing shall be provided prior to the commencement of clearing and grubbing operations or other soil -disturbing activities in areas. ■ Clearing -and grubbing operations should be staged topreserve existing vegetation. Limitations Protection of existing vegetation requires planning, and may limit the area available for construction;�activities. ,Standards and Timing Specifications n Preservation of existing vegetation shall be provided prior to the commencement of clearing and grubbing operations or other soil -disturbing activities in areas identified on the plans to be preserved, especially on areas designated as Environmentally Sensitive Areas (ESAs). ■ Preservation of existing vegetation shall conform to scheduling requirements set forth in the special provisions. Design and Layout ■ Mark areas to be preserved with temporary fencing made of orange .polypropylene that is stabilized against ultraviolet light. The temporary fencing shall be at least 1 meter (3.2. ft) tall and shall have openings not larger than 50 mm by 50 mm (2 in by 2 in).. Caltrans Storm Water Quality Handbooks Section 3 ' f�► Constru4lon Site Best Management Practices Manual Preservation of E)dsting Vegetation SS -2 drlbzrrti March 1, 2403 1 of 3 I' Preservation of Existing Vegetation SS -2 ■ Fence posts shall be either wood or metal, at the Contractor's discretion, as appropriate for the intended purpose. The post spacing anddepth shall be adequate to completely support the fence in an upright position. ■ Minimize the disturbed areas by locating temporary roadways to avoid stands of trees and shrubs and to follow existing contours to reduce cutting and filling. ■ Consider the impact of grade changes to existing vegetation and the root zone. Installation ■ Construction materials, equipment storage, and parking areas shall be located where they will not cause root compaction. ■ Keep equipment away from trees to prevent trunk and root damage. ■ Maintain existing irrigation systems. ■ Employees and subcontractors shall be instructed to honor protective devices. No heavy equipment, vehicular traffic, or storage piles of any construction materials shall be permitted within the drip line of any tree to be retained. Removed trees shall not be felled, pushed, or pulled into any retained trees. Fires shall not be permitted within 30 m (100 ft) of the drip line of any retained trees. Any fires shall be of limited size, and shall be kept under continual surveillance. No toxic or construction materials (including paint, acid, nails, gypsum board, chemicals, fuels, and lubricants) shall be stored within 15 m (50 ft) of the drip line of any retained trees, nor disposed of in any way which would injure vegetation. Trenching and Tunneling ■ Trenching shall be as far away from tree trunks as possible, usually outside of the tree d#pdine or canopy. Curve trenches around trees to avoid large roots or root concentrations. _If roots are encountered, consider tunneling under them. When trenching and/or tunneling near.or under trees to be retained, tunnels shall be at least 450 mm (18 in) below the ground surface, and not below the tree center to minimize impact on the roots. ■ Tree roots shall not be left exposed to air; they shall be covered with soil as soon -as possible, protected, and kept moistened with wet burlap or peat moss until the tunnel and/or trench can be completed. ■ The ends of damaged or cut roots shall be cut off smoothly. ■ Trenches and tunnels shall be filled as soon as possible. Careful filling and tamping will eliminate air spaces in the soil which can damage roots. ■ Remove any trees intended for retention if those trees are damaged seriously enough to affect their survival. If replacement is desired or required, the new tree shall be of similar.species, and at least 50 mm (2 in) caliper, unless / Caltrans Storm Water Quality Handbooks Section 3 (� Construction Site Best Management Practices Manual Preservation of Existing Vegetation SS -2 o March 1,°20,03 2 of 3 t.. Preservation of Existing Vegetation SS -2 otherwise required by the contract documents. ■ After all other work is complete, fences and barriers shall be removed last. This is because protected trees may be destroyed by carelessness during the final cleanup and landscaping. Maintenance and During construction, the limits of disturbance shall remain clearly marked at all Inspection times. Irrigation or maintenance of existing vegetation shall conform to the requirements in the landscaping plan. If damage to protected trees still occurs, maintenance guidelines described below shall be followed: n Serious tree injuries shall be attended to by an arborist. ■ During construction, District Environmental shall .be contacted to ensure that ESAs are.protected. OCaltrans Storm Water Quality Handbooks Section 3 Construction Site Best Management Practices Manual Preservation of Existing Vegetation SS -2 ak*zvw March i, 201Q3 3 of 3 Hydroseeding SS -4 BMP Objectives • Soil Stabilization o Sediment Control o TrackCng' Control • Wind Erosion Control o Non -Storm Water Management o Materials and Waste Management Definition and Hydroseeding typically consists of applying .& mixture'of wood fiber-, seed, Purpose fertilizer, and- stabilizing emulsion with hydro -mulch equipment, which temporarily protects exposed soils from erosion by water and wind. This is one of five temporary soil stabilization alternatives fo consider. Appropriate ■ Hydroseeding is applied on disturbed soil areas requiring temporary Applications protection until.permanent vegetation is'estal fished or disturbed soil areas that must be re -disturbed following an extended period of inactivity. ' Llmltations ■ Hydroseeding may be used alone only when there is sufficient time in the season to ensure adequate vegetation establishment and erosion control. Otherwise, hydroseeding must be used in conjunction with a soil binder or mulching (i.e., straw mulch), refer to BMP SS -5, Table 1 for options. ■ Steep slop's are difficult to protect with temporary seeding. ' ■ Temporary seeding may not be appropriate in dry periods without supplemental irrigation. ■ Temporary vegetation may have to be removed before permanent vegetation is applied. ' ■ Temporary vegetation is not appropriate for short-term inactivity, Caltrans Storm Water Quality Handbooks Sebtlon 3 Construct! .Qn Site Best Management Practfcea Ma-MUal Hydroseeding SS -4 March I. 2(1b1�, 1013 Hydroseedfng SS =4 Standards and To sele4t appropriate hydroseeding mixtures, an evaluation of site conditions shall Specifications be performed with respect to; — Soil conditions Maintenance requirements — Site topography - Sensitive adjacent areas Season and climate — Water. availability Vegetation types — Plans for permanent vegetation ■ Selection of hydroseeding mixtures shall be approved by the District Landscape Architect and the Construction Storm Water Coordinator. The following steps shall be followed for implementation: ■ Seed mix shall comply with the Standard Specifications Section 20-2.10, and the project's speoial provisions. ■ Hydroseeding can be accomplished using -a multiple -step or one-step *process refer to the special provisions for specified process. The multiple -step process ensures maximum direct contact of the seeds to soil. When the one- step process is used to apply the mixture of fiber, seed; etc., the seed rate shall be increased to compensate for all seeds not having direct contact with the soil. ■ Prior to application, roughen the* slope, fill area, or area to be -seeded with the furrows trending along the contours. Rolling with a crimping or punching type roller or track walking is required on all slopes prior to hydroseeding. 'Track walking shall only be used where other methods are impractical. ■ Apply a straw mulch -to keep seeds in place and to moderate soil moisture and temperature: -until the seeds germinate and grow, refer to Standard Specifications Sections 20-2.06 and 20-3,03. ■ AU*seeds shall be in conformance with the California State Seed Law of the Department of Agriculture, Each* seed bag shall be. delivered to the site sealed and clearly marked as to species, purity, percent germination, dealer's guarantee, and dates of test; provide the Resident Engineer (RE) with suoh documentation. The container shall be labeled to clearly reflect -the amount of Pure Live Seed (PLS) contained. All legume seed shall be pellet -inoculated, Inoculant sources shall be species-specific and shall be applied at a rate of 2 kg of inoculant per 100 kg of seed. (2 -lb inoculant per 100-1b seed), refer to Standard Specifications Section 20-2,10. . ■ Commercial fertilizer shall conform to the requirements of the California Food and Agricultural Code, Fertilizer shall be:pelleted or granular form. Caltmns Storm Water Quallty Handbooks section 3 Conatructlon $its Best Management Practices Manual Hydrosseding S3-4 wnr March 1, 200. 2 of 3 ,,r Hydrosdedin.g SS -4 ■ Follow-up applications shall be made as needed to cover weak spots, and to maintain adequate soil protection, ■ Avoid over -spray onto -the traveled way, sidewalks, lined drainage channels, and existing vegetation, Maintenance and ■ All seeded areas shall be inspected for failures and re -seeded; fertilized, and Inspection mulched within the planting season, using not less -than half the original application rates, Any temporary revegetation efforts that do not provide adequate cover must be reapplied at a scheduled recommended by the Caltrans Landscape Architect or RE, ■ Ager any rainfall event, the Contractor is responsible for maintaining all slopes to prevent erosion, AWCaltrans StormWater Quality Handbooks Section 3 Construction Site Best Management Practices Manual Hydroseeding 88.4 March i,03 3 ot3 Straw Mulch SS.6 Standard Symbol BMP Objectives • Soil Stabilization o Sediment Control o Tracking Control a Wind Erbslori Cdntrdl o Non -Storm Water Management 'o Materlals and Waste Management Definition -and Straw mulch consists of placing a uniform layer of straw and incorporating it into Purpose the soil with a studded roller or anchoring it with a stabilizing emulsion. This is one of five temporary soil stabilization alternatives to consider. Appropriate ■ Straw mulch is typically used for soil stabilization as a temporary surface Applications cover on disturbed areas until soils can be prepared for revegetation and permanent vegetation is established. ■ Also.typically used in combination with temporary and/or permanent seeding strategies to enhance plant establishment. Limitations ■ ' Availability of erosion control -contractors and straw maybe limited prior to the rainy season due to high demand. ■ There is a -potential for introduction of weed -seed and unwanted plant material. ■ When straw blowers are used to apply straw mulch, the treatment areas must be within 45 m (150 ft) ofs, road or surface capable of supporting trucks. n Straw mulch applied by hand is more time intensive and potentially Costly. ■ May have to be removed prior -to permanent seeding or soil stabilization. ■ "Punching" of straw does not work in sandy soils. AWCaltrans Storm Water Quality Handbooks Section 3 . construction Slte'Best Management Practices Manual Straw Mulch SS•ti Qi�iev . March 1, 2d 1 of 3 Straw Mulch gg..6. Standards and ■ Straw shall be derived from wheat, rice,.or barley. ' Specifications ■ All materials shall conform to Standard Specifications Sections 20-2,06, 20-2.07 and 20-2.11, ' a A tackifier is the referred method for anchorin straw mulch to p g the soil on slopes, ' ■ Crimping, punch roller-tYpa rollers or track -walking may also be used d to incorporate straw mulch into the soil on slopes. Track walking shall only be ' used where other methods are impractical, ■ Avoid placing straw onto the traveled way, sidewalks, lined drainage ' channels, sound walls, and existing vegetati9.n, . i Straw mulch with tackifier shall not be applied during or immediately before • rainfall. .. . Appllcailon Procedures . ' rt Apply loose straw at a minimum rate of 3,570 kg/ha (4,0001b/ac), or as indicated in the project's special provisions, either by machine or by hand distribution. ' ■ If stabilizing emulsion will be used to anchor the straw mulch in lieu of incorporation, roughen embankment or fill areas by rolling with a crimping or punching -type roller or by track walking before placing the straw mulch. ' Track walls ng should only be used where rolling is impractical. ■ , The straw mulch must be evenly distributed on the soil surface. ' ■ Anchor the mulch in place by using a tackifier or by ' �unchin it into the g' soil meclia=- cally (incorporating). t A tackifier'acts to glue'the straw fibers together and to the soil surface. The tackifies shall be selected based on:longevity and ability to hold the fibers in ' place.. ■ Atackifier is typically applied at a rate of 140 kg/ha.(125 lb/ac). In windy ' conditions, the rates are typically 200 kg/ha (178 lb/ac). III Methods for holding the straw mulch in place depend upon the slope steepness, accessibility, soil 'conditions and longevity. If the selected method is incorporation of straw mulch into the soil, then do as follows; — Applying and incorporating straw shall follow the requirements in ' Standard Specifications Section 20-3,03. On small areas; a spade or shovel can be used, CaltrpmStorm Water Quallty Handbooks Section 3 s Construction Site Best Management Practices -manual Straw Mulch 53.6 '� March 1,20:' 2 df 3 e to s4��w MAW 8 -es 46InW Mals (enwaW eeaRosad ;uewe9sueW 3998 ells uo tMuOOAft ' E-uoIii es sNoo4PuRH 1411enp JOIBM uuo;s sumeb s �uotsoxa ;uanazd oq sodo T Ul pmMuT= zoj olglsuodsoa si zM'84uOD ate `;uana TTeFMI AU13 IOUV ■ -sodols pus.sgaze pogzn4stp fano uopezr�iq s Taos anpoa a ute�uteut 04 (ate zaautBua Mptsag age Aq paztnbaz oq Auta IOUW'4 pue golnm &134s jo uo, Iddiao ■ ' ,seaze posodxo goTnm-az pub ranoo punoz2 p02euuep Aue xmdag 'anpoe-uou on sVSQ aj,gm zanoo pu=2 poplu i Aniodm ua:TozgBn ug urutay� ■ uoo uotsoa anaTuoT4seo; suoiToadsuj sanl}oaCgo Tozoe.o� �noua d ' spaau mps ap Tvp si uopoadsui pub aoueua}uTsjN u� uogezapisaoo fay agy a Pule aoueuaTuiew she s}a�Tuzjg Toz�tio� uotsoza pus szatioD 0us21d `saTpxa4oa'Z)„ ' `L -SS H1H oT za�a� sates uapoonn zo surd ojl}xa;oat `solde4s. anm o2t d T T' 2msn aoeld to plag Qq TTens 279pu o -q L -ajrnCzo 2u 4ou ouseld 2utsn aoejd a plaq aq osp mo Mens `sadojs daajs zo/pue seaze llerus up — „'zadaruo..a se 411Btozatuuz00 umoq `zagnoo papelq Tq2 m. a j a 2msn punoz2 aq� oTtn „pagound„ aq ueo r,�ezTs `sutalgozd r�geTstn pue -aouoeduzoo ol 2uurigt:4uo61nolpA pamdttmba uponz� osuoo poddns Aloes oT ' jualpez� auaiot nsjo pm JTLoua alae}s an -qo `sjios �tM sadojs up — 9 -SS moinw nn�a�g Stabilized ''Construction EntrancOUR TO I Description and Purpose Objectives A stabilized construction access is defined by a point of EC Eroslon Control s SE Sediment Control ✓ vehicles. TC Tracking Control ✓ Bacteria Oil and Grease WE Wind Erosion Control ■ Where dirt or mud ca.n be tracked onto public road's, N.S Non-Stormwater Potential Alternatives ■ Adjacent to water bodies. Management Control WM Waste Management and © Materials Pollution Control Limitations Legend: ■ Entrances and w dts require periodic top dressing ✓ Primary Objective ■ This BMP should be used in conjunction with street ✓ Secondary Objective Description and Purpose Targeted Constituents A stabilized construction access is defined by a point of Sediment ✓ to a construction site that is stabilized to reduce. entrance/exitTrash s the tracking of mud and dirt•onto public•roads by ru constction ' Trash vehicles. Metals Sultable Applications Bacteria Oil and Grease Use at -construction sites; . Organics ■ Where dirt or mud ca.n be tracked onto public road's, Potential Alternatives ■ Adjacent to water bodies. None ■ Where poor soils are encountered, ■ . Where dust is a roblem d ' P uring dry weather conditions. Limitations ■ Entrances and w dts require periodic top dressing with additional stones. ■ This BMP should be used in conjunction with street sweeping on adjacent public right of way. ■ Entrances and exits should•be constructed level on ground only, Stabilized construction entrances are rather expensive to fmc � A construct and when a wash rack is included, a sediment'trap of -1fornS some land must also be provided to collect wash water runoff, Stormwater Quality Assoclatlon ' January 2003 California Stormwater BMP Handbook i'of 6 Construction www.cabmphan'dbooks.com ' Stabilized. Construction Entrance/ Exit TC -1 Implementatlon tGeneral Astabilized construction entrance is a pad of aggregate underlain with filter cloth located at any point where traffic will be entering or leaving a construction site to or from a public right of way, ' street, alley, sidewalk, or parking area. The purpose of a stabilized construction entrance is to reduce or eliminate the tracking of sediment onto public rights of way or -streets. Reducing tracking of sediments .and other pollutants onto paved roads helps prevent deposition of ' sediments into local storm drains and production of airborne dust. Where traffic will be entering or leaving the construction site, a stabilized construction entrance should be used. NPDES permits require that appropriate measures be implemented to prevent tracking of sediments onto paved roadways, where a significant source of sediments is derived from mud and dirt carried out from unpaved roads and construction sites. Stabilized construction entrance1. s are moderately effective in removing sediment from equipment leaving a construction Bite; The entrance should be built on level ground. Advantages of the Stabilized Construction Entrance/Exit is that it does remove some sediment from equipment and serves -to channel construction traffic in and -out of the site at specified locations, Efficiency is greatly increased when a washing rack is included as part of a stabilized construction entrance/exit. Design and Layout a Construct on level ground where possible. i Select 3 to 6M". diameter stones. ■ Use minimum depth of stones of 12 in, or as recommendedby soils engineer. ■ Construct length of 5o ft minimum, and.3o ft minimum width. ■ Rumble racks constructed of steel panels with ridges and installed in the stabilized entrance/exit will help remove additional sediment and to keep adjacent streets clean. ■ Provide ample turning radii as part'of the entrance. ■ Limit the points of entrance/exit to the construction site. i Limit speed of vehidog to niitrol dust; ■ Properly grade each construction entrance/exit to prevent runoff from leaving the construction site. w Route runoff from stabilized entrancea/vits through a sediment trapping device before discharge, ' ■ Design stabilized entrance/exit to support heaviest vehicles and equipment that will use'it, ■ Select construction access stabilization (aggregate, asphaltic concrete, concrete) based -on tlongevity, required performance, and site conditions, Do not use asphalt concrete (AQ. grindings for stabilized construction access/roadway. 206 California Stormwater BMP Handbook January 2003 Construction www. ca bmphandbooks.coni .Stabilized Construction Entrance/Exit TC -1 ■ If aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in, depth, ' or place aggregate to a depth recommended by a geotechnical engineer. A crushed aggregate greater than 3 in, but smaller than 6 in, should be used. Designate combination or single purpose entrances and exits -to the construction site, Require that all employees, subcontractors, -and suppliers utilize the stabilized construction ' access, ■ Implement SE -7, Street Sweeping and Vacuuming, as needed, r All exit locations intended to be used for more than a two-week. period should have stabilized construction entrance/exit BMPs. ' Inspection and -Maintenance it Inspect and verify that activity -based BMPs are in place prior to the commencement of associated 'activities, While activities associated with the BMPs are under way, inspect ' weekly during the rainy season and of; two-week intervals in the non -rainy season to verify continued BMP implementation: ' ■ Inspect local roads adjacent to the site daily.. Sweep or vacuum to remove visible accumulated sediment. ■ Remove aggregate, separate and.dispose of sediment if construction entrance/.exit is clogged twith sediment, ■ Keep all temporary roadway ditches clear. ' ■ Check for damage and repair as needed. r Replace gravel material when surface voids are visible. ' ■ Remove all sediment deposited on paved roadways within 24 hours. 1 . Remove gravel and filter fabric at completion of -construction ' Costs Average annual cost for installation and maintenance may vary from $1,2oo.to $4,80o each, ' averaging..$2,4O0 per entrance. Costs will increase with addition. of washing rack, and sediment trap. With wash raek, costs range from $Y;2oo - $6,00o each, averaging $3,60o per entrance. ' References Manual of Standards -of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995.. ' National Management Measures to Control Nonpoint Source Pollution from Urban Areas, USEPA Agency, 2002, ' Proposed Guidance Specifying Management Measures for -Sources of Nonpoint Pollution in Coastal Waters, Work Group Working Paper, USEPA, April 1992. January. 2003 Callfornla Stormwater BMP Handbook 3 bf 6 ' Constructlon �www.cabmphandbooks.com T' Stabilized Construction Entrance/Exit 7C -i Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992. .Virginia Erosion and Sedimentation. Control Handbook, Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, 1991. Guidance Specifying Management Measures for Nonpoint Pollution in Coastal Waters, EPA 840-B-9-7002, USEPA, Office of Water, Washington, DC, 1993, Water Quality -Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988... 4 of 6 Callfornla.Stormwater BMP Handbook January 2003 Construction www,cabmphandbooks.com Stabilized Construction Entrance/Exit TC -1 Crushed aggregate greater . than 3" but smaller than _ 6" Filter f.obric Original �o p o �o Oo grode 12 " Min, unless otherwise specified by a soils engineer .SECTION B=B NTS )anuary • -. •• - - . • db inticipbted lie traffic en r:•.. -... ..-culvert --.. 50' Min or four times the circumference .of the largest constructior� vehicle tire, Match -• - whichever greater Existing ••- Grade P -LA -N January 2003 Callfornla Stormwater BMP Handbook 5 of 6 Construction www,cabrnphandbooks,com Stabilized Construction Entrance/Exit.-TC-1 Crushed aggregate greater than 3" but smaller than 6". Filler fabric Original 0 grade 12" Min, unless otherwise specified by o soils engineer SECTION -B—B N 77 - Crushed aggregate greater than 3" but smaller than 6". . Corrugated steel panels Original ' grade 12" Min, unless otherwise . specified by o soils engineer Filter fabric SECTION ANOT TO SCALE =A NOTE: Construct sediment barrier and channelize runoff' to sediment trappingdevice a ti Sediment trapping device L U 1 Q 1 1 Corrugatedpanels �'i ••���i l'•�'i� •I'• ijj•. i •^�• �. •I T. -P -771O enin or to as required • y,✓•. �•�1 •��, .�•.••,• • •• ••• 100 G,i• anticipated ♦iO'i +" • A ••., f •Ill1�WWttlt1llLWllllll1l111111 • ! • f X. II iij�I i���u• •fit •, • ��I''�� • Il il•I •• I•i� •Ii•�I• •ever is grdoter.. min I• 50' min or four times the circumference of the* I largest, Match Existing PLAN Grade ' b of 6 California Stormwater BMP Handbook )anuary 2003 Construction www,cabmphandbooks.com Stabilized. Construction Roadway TC -2 Objectives EC Erosion Control p SE Sediment Control p TC Tracking Control Cd WE Wind Erosion Control NS Non•Stormwater Management Control WM Waste Management and Materials Pollution Control Description and Purpose Access roads, subdivision roads, parking areas, and other onsite vehicle transportation routes should be stabilized immediately afar grading, and frequently maintained to prevent erosion and control dust. Suitable Applications This BMP should be applied for the following conditions: ' .m Temporary Construction Traffic: Phased construction projects and offsite road access ' - Construction during wet weather ' ■ Construction roadways and detour roads: Where mud tracking is a problem during wet weather ' - Where dust is a problem during dry weather - Adjacent to water bodies ' - Where poor soils are encountered ' Limitations ■ The roadway must be removed or paved when construction is complete. Legend: Q Primary Objective © Secondary objective Targeted Constituents Sediment C� Nutrients Trash Metals Bacteria Oil and Grease Organics Potential Alternatives None cALrMIASMR ,xATMt QL X1_11! ASN( ..AI IAP, January 2003 Callfbmla Stormwater BMP Handbook 1 of 4 Construction www.cabmphandbooke.com 1 TC -2 stabilized Construction Roadway ■ Certain chemical stabilization methods may cause stormwater or soil pollution and should not be used. See WE -1, Wind Erosion Control. ■ Management of construction traffic is subject to air quality control measures. Contact the local air. quality management agency. m Materials will likely need to be removed prior to final project grading and stabilization. ■ Use of this BMP may not be applicable to very short duration projects. Implementation General Areas that are graded for construction vehicle transport and parking purposes are especially susceptible to erosion and dust. The exposed soil surface is continually disturbed, leaving no opportunity for vegetative stabilization. Such areas also tend to collect and transport runoff waters along their surfaces. During wet weather, they often become muddy quagmires that generate significant quantities of sediment that may pollute nearby streams or be transported offsite on the wheels of construction vehicles. Dirt roads can become so unstable during wet weather that they are virtually unusable. Efficient construction road stabilization not only reduces onsite erosion but also can significantly speed onsite work, avoid instances of immobilized machinery and delivery vehicles, and generally improve site efficiency and working conditions during adverse weather Installation/Application Criteria Permanent roads and parking areas should be paved as soon as possible after grading. As an alternative where construction will be phased, the early application of gravel or chemical stabilization may solve potential erosion and stability problems., Temporary gravel roadway should be considered during the rainy season and on slopes greater than 5%. Temporary roads should follow the contour of the natural terrain to the maximum extent possible. Slope should not exceed 15%.. Roadways should be carefully graders to drain transversely. Provide drainage swales oneach side of the roadway in the case of a crowned section or one side in the case of a super each section. Simple gravel berms without a trench can also be used. Installed inlets should be protected to prevent sediment laden water from entering the storm sewer system (SE-io, Storm Drain Inlet Protection). In addition, the following criteria should be considered. ■ Road should follow topographic contours to reduce erosion of the roadway. ■ The roadway slope should not exceed 1'5%. ■ Chemical stabilizers.or water are usually required on gravel or dirt roads to prevent dust (WE -i, Wind Erosion Control). ■ Properly grade roadway to prevent runoff from leaving the construction site. ■ Design stabilized access to support heaviest vehicles and equipment that will use it. 2 of 4 Callfbmla Sbohnwaber BMP Handbook January 2003 Construction www.cabmphandbooke.com Stabilized Construction Roadway TC .2 ■ Stabilize roadway using aggregate, asphalt concrete, or concrete based on longevity, required performance, and site conditions. The use of cold mix asphalt or asphalt concrete (AC) ' grindings for stabilized construction roadway is not allowed. ■ Coordinate materials with those used for stabilized construction entrance/exit points. a If aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in. depth. A crushed aggregate greater than 3 in. but smaller than 6 in. should be used. ' Inspection and Maintenance ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of ' associated activities. While activities associated with the BMP are under way, impact weekly during the rainy season and of two-week intervals in the non-rainy season to verify continued BMP implementation. ■. Keep all temporary roadway ditches clear. ■ When no longer required, remove stabilized construction roadway and re-grade and repair ' slopes. ■ Periodically apply additional aggregate on gravel roads. ' ■ 'Active dirt construction roads are commonly watered three or more times per day during the dry season. Costs Gravel construction roads are moderately expensive, but cost is often balanced by reductions in construction delay. No additional costs for dust control on construction roads should be ' required above that needed to meet local air quality requirements. References ' Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995• Coastal Nonpoint Pollution Control Program; Program Development and Approval Guidance., Working Group, Working Paper; USEPA, April 1992• ' Manual of Standards of Erosion and Sediment Control Measures, Association of Bay Area Governments, May 1995, ' Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices, EPA 832-R-92oo5; USEPA, April 1992. 1 Stormwater Management of the Puget Sound Basin, Technical Manual, Publication #91-75, Washington State Department of Ecology, February 1992• January 2003 California Sbormwater BMP Handbook 3 of 4 Construction www.cabmphandbooke.com TC -Z stabilized Construction Roadway Virginia Erosion and Sedimentation Control Handbook, Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, i99i. Water Quality Management Plan for the Lake Tahoe Region, Volume II, Handbook of Management Practices, Tahoe Regional Planning Agency, November 1988... 40f 4 Callfbmla Sbormwater BMP Handbook January 2003 . :.III Construction www.cabmphandbooks.com Entrance/Outlet Tire Wash TC -3 o Standard Symbol ME BMP Objectives • Soll Stabilization a Sediment -Control • Tracking Control o Wind Erosion Control o Non -Storm Water Management o Matadals and Waste Management Definition and A tire wash is an area located at stabilized construction access points to remove Purpose sediment from tires and undercarriages, arid. to prevent -sediment from being transported onto public roadways, Appropriate ■ Tire washes may be used on construction sites where dirt and mud tracking Appilcations onto public roads by construction vehicles may occur. ■ This BMP may be implemented on a project -by -project basis with other BMPs when determined necessary and -feasible by.the Resident Engineer (RE). Urnitations ■ Requires a supply of wash water. ■ Requires a turnout or doublewide exit to avoid having entering vehicles drive through the wvash area. Standards and ■ 'Incorporate with a stabilized construction entrance/exit. See BMP TC -1, Speolficatlons . "Stabilized Construction Entrance/E iIvl Y Construct on level ground when possible, on a pad of coarse aggregate, greater than 75 mm (3 inches) and smaller than 150 mm (6 inches). A geotextile fabric shall be placed below the aggregate. ■ Wash rack shall be designed and constructed/manufactured for anticipated traffic loads, ■ Provide a drainage ditch that will honey the runoff from the wash area to a sediment trapping device. The drainage ditch shall be of sufficient grade, width, and depth to carry the wash runoff, ' Caltrans Stoh Water Quality Handbooks Section B ■� Construction Site Best Management Practicea Manual .. Entrance/Outlet Tire Wash TC -3 March 1, 2003 ' 1 of 3 Entrance/Outlet Tire Wash TC -3 ■ Require all employees, -subcontractors, and others that leave the site with mud -caked tires and/or undercarriages to use the wash facility. Implement BMP SC -7, "Street Sweeping and Vacuuming" as needed. a Use of constructed or prefabricated steel plate with ribs for entrance/exit access is allowed with written approval of RE. Maintenance and ■ Remove accumulated sediment in wash rack and/or sediment trap to maintain Inspection system performance. ■ Inspect routinely for damage and repair as needed. 'Caltrans Storm Water Quality Handbooks Constructlon Site Beat Management Practicee Manual e .Marchl, 2003 Sectlon B Entrance/Outlet Tire Wash TC -3 2of3 Entrance/Outlet Tire Wash Crushed aggregate greater than 75 mm Corrugated steel panels (3 in) but smaller thou 150 mm (6 in) Filter fabric 'Original grgde 300 rnm (12 in) Min, unless otherwls�e specified by a soils engineer SECTION A -A NOT -TO SCALE Crushed ciocireaate greater than 75 mm mm (6 In) s specified by .c soils .engineer SECTION B -B Ditch to carry runoff — to a sediment trapping device A a � Mf� }: Many designs can be field X. or • r • •units''moy be used. Wat- .. TYPICAL TIRE -WASH NOT TO SCACE ONCaltrane Storm Water Quallty Handbooks Section 6 . -C 8lte*Bsst Management Practice# Manual rEntrance/Outlet Tire Wash TC -3 yy March 1, 2003 3 of 3. 4 Wind Erosion Control WE -1 Objectives EC Eroslon Control SE Sediment Control ✓ TC Tracking Control WE Wind Erosion Control ✓ NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control ; .. Legend: ✓ Primary Objective ' ✓ Secondary Objective Description and Purpose Wind erosion or dust control consists of applying water or other dust palliatives as necessary to prevent -or alleviate dust nuisance generated by construction activities. Covering small* stockpiles or areas is an alternative to applying water or other dust palliatives. Suitable Applications Wind erosion control BMPs are suitable during the following construction activities: ■ Construction vehicle traffic on unpaved roads ■ Drilling and blasting activities . ' ■ Sediment tracldng onto paved roads ■ Soils and debris storage piles ' ■ Batch•drop from front-end loaders ■ Areas with unstabilized soil ' ■ Final grading/site stabilization Targeted Constituents Sediment Nutrients trash Metals Bacteria Oil and Grespe Organics Potential Alternatives None ' Llmltatlons a Watering prevents dust only for a short period and should be applied daily (or more -often) .tb be effective. ASQA Over watering may cause erosion. astormwater Quality Association January 2003 Californla Stormwater. BMP Handbodk i of 5 Construction ! www.cabMphandbooke.com .i. WE`i Wind Erosion Control ' ■ Oil or oil -treated subgrade should not be used for dust control because the oil may migrate into drainageways and/or seep into the soil, ' ■ Effectiveness depends on soil, temperature, humidity, and wind velocity, ■ Chemically treated sub grades may make the soil water repellant, interfering with long-term t infiltration and the vegetation/re-vegetation of the site, Some chemical dust suppressants maybe subject to freezing and may contain solvents and should be handled properly, ■ Asphalt, as a mulch tack or chemical mulch, requires a 24-hour curing time to avoid ' adherence to equipment, worker shoes, etc. Application should be limited because asphalt surfacing may eventually migrate into the drainage system. ' ■ In compacted areas, watering and other liquid dust control measures may wash sediment or other constituents into the drainage system. Implementation ' General California's Mediterranean climate, with short wet seasons and long hot dry seasons, allows the soils to thoroughly dry out,. During these dry seasons, construction activities are at their peak, . and disturbed and exposed areas are increasingly subject to wind erosion, sediment*tracldng and dust generated by construction equipment. ' Dust control, as* a BMP, is a practice that is already in place for many construction activities, Los Angeles, the North Coast, and Sacramento, among others, have enacted dust control ordinances for construction activities that cause dust to be transported beyond the construction project property line, Recently, the State Air Resources Control Board has, under the authority of the Clean Air Act, started to address air quality in relation to inhalable particulate matter less than io microns (PILI-io). Approximately go percent of these small particles are considered to be durst. Existing dust. control regulations by local agencies, municipal departments, public works' department, and public health departments are in plate in some regions within California.. a;. Many local agencies require dust control in order to comply with local nuisance laws, opacity laws (visibility impairment) and the requirements of the Clean Air Act. The following are measures that local agencies may have already implemented as requirements for dust control from contractors:' ■ Construction and Grading Permits:. Require provisions for dust control plans. ■ Opacity Emission Limits: Enforce compliance with California air pollution control laws. E Increase Overall Enforcement Activities: Priority given to cases involving citizen complaints, . a Maintain Field Application Records:. Require records of dust control measures from contractor; a Stormwater Pollution Prevention Plan: (SWPPP): I SWPPP, ntegrate dust control measures into 2 of 5 Callfornla Stormwater BMP Handbook January 2003 Constructlon www.cabmphandbooks.com Wind. •Erosion Control WE -1 Dust Control Practices Dust control BMPs generally stabilize exposed surfaces and minimize activities that suspend or track dust particles, The following table shows dust control practices that can be applied to site conditions that cause dust, For heavily traveled and disturbed areas, wet suppression (watering), chemical dust suppression, gravel asphalt surfacing, temporary gravel construction entrances, equipment wash-out areas, and haul truck covers can be employed as dust control applications, Permanent or temporary vegetation and mulching can be employed for areas of occasional or no construction traffic. Preventive measures would include minimizing surface areas to be disturbed, limiting onsite vehicle traffic to i5 mph, and controlling the number and activity of vehicles on a site at any given time. Additional preventive measures include: Schedule construction activities to minimize exposed area (EC -1, Scheduling), ■ Quickly stabilize exposed soils'using vegetation, mulching, spray -on adhesives, calcium chloride, sprinkling, and stone/gravel layering. ■ Identify and stabilize key access points prior to commencement of construction. ■ Minimize the impact of dust by anticipating the direction of prevailing winds. ■ Direct most construction traffic to stabilized roadways within the project site. ■ Water should be applied by means of pressure-type distributors or pipelines equipped with a spray system or hoses and nozzles that will ensure even distribution, ■ All distribution equipment should be equipped with apositive means of shutoff. ■ Unless water is applied by means of pipelines, at least one mobile unit should be available at all times to apply water. or dust palliative to the project. January 2003 Callfornla Stormwater BMP Handbook 3 of 5 Construction www.cabrnphandbooks.com DUST COMRoIPRACTICES Permanent Chemical Temporary Gravel Haul Minlm�e SITE CONDITIONWet Vegetatlbh Mulching Suppression (Watering) Duet Suppression Gravel or Asphalt Slit Fences Construction �Entranced/Equlpmen Truck Extent of �laturbed Wash Down Covers Area Disturbed Areae not Subject to X X X X X Traffid X Disturbed Areas Subject to Traffic X. X X X X Material Stock Pile Stabilization X X X X Demolition X X X Clepdng/ Excavation X X X X Trude Traffic on Unpaved.Rdads X X X X X MID lit Carry out X X Additional preventive measures include: Schedule construction activities to minimize exposed area (EC -1, Scheduling), ■ Quickly stabilize exposed soils'using vegetation, mulching, spray -on adhesives, calcium chloride, sprinkling, and stone/gravel layering. ■ Identify and stabilize key access points prior to commencement of construction. ■ Minimize the impact of dust by anticipating the direction of prevailing winds. ■ Direct most construction traffic to stabilized roadways within the project site. ■ Water should be applied by means of pressure-type distributors or pipelines equipped with a spray system or hoses and nozzles that will ensure even distribution, ■ All distribution equipment should be equipped with apositive means of shutoff. ■ Unless water is applied by means of pipelines, at least one mobile unit should be available at all times to apply water. or dust palliative to the project. January 2003 Callfornla Stormwater BMP Handbook 3 of 5 Construction www.cabrnphandbooks.com WE -1 : Wind -Erosion Control ■ If reclaimed waste water is used, the sources and discharge must meet California Department of Health Services water reclamation criteria and the Regional Water Quality Control Board requirements. Non -potable water should not be conveyed in tanks or drain pipes that will be used to convey potable water and there should be -no connection between potable and non -potable supplies. Non -potable tanks, pipes, and other conveyances should be marked, "NON -POTABLE WATER - DO NOT DRINK." s Materials applied as temporary soil stabilizers and soil binders also generally provide wind erosion control benefits. ■ Pave or chemically stabilize access points where unpaved traffic surfaces adjoin paved roads. a Provide covers for haul trucks transporting materials that contribute to dust. a Provide for wet suppression or chemical stabilization of exposed soils.- - K Provide for rapid clean up of sediments deposited on paved roads. Furnish stabilized construction road entrances and vehicle wash down areas. ■ Stabilize inactive construction sites using vegetation or chemical stabilization methods. ■ Limit the amount of areas disturbed by clearing and earth moving operations by scheduling these activities in phases. For chemical stabilization, there are many products available for chernically'stabilizing gravel roadways and stockpiles. If chemical stabilization is used, the -chemicals should not create any adverse effects on stormwater, plant life, or groundwater. Costs Installation costs for water and chemical dust suppression are low, but annual costs maybe quite high since these measures are effective for onlys. few hours to a few days. Inspection and Maintenance. s Inspect and verify that activity-based;BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and at two-week intervals in the non -rainy season to verify . continued BMP implementation, ■ Check areas protected to ensure coverage. ■ Most dust control measures require frequent, often daily, or multiple times per day attention. _ References Best Management Practices and Erosion Control Manual for Construction Sites, Flood Control District -of Maricopa County, Arizona, September 1992. California Air Pollution Control Laws, California Air Resources Board, 1992. 4 of 5 California Stormwater BMP Handbook January 2003 'Construction www.cabmphandbooks.com J Wind erosion Control WE`1 Caltrans, Standard Specifications, Sections 1o, "Dust Control"; Section 17, "Watering"; and Section 18 "Dust Palliative", ' Prospects for Attaining the State Ambient Air Quality Standards for. Suspended Particulate Matter (PM1o), Visibility Reducing Particles, Sulfates, Lead, and Hydrogen Sulfide, California Air Resources Board, April 1991, Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. 1 1 January 2003 Callfomta Stormwater BMP Handbook 5 of 5 t Construction www,cabmphandbooks.com Wind Eroslon Control WE -1 Caltrans, Standard Specifications, Sections io, "Dust Control"; Section 17, "Watering"; and Section 18; "Dust Palliative". Prospects for Attaining the State Ambient Air Quality Standards for Suspended Particulate Matter (PM1o), Visibility Reducing Particles, Sulfates, Lead, and Hydrogen Sulfide, California Air Resources Board, April 199i, Stormwater Quality Handbooks Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000, January 2003 Callfornia Stormwater BMP Handbook 5 of 5 Construction �� www.cabrnphandbooks.com Storage' ✓ Primary Objective ✓ Secondary Objective i. 1 ir ALM -- sC Nutrients 1 r/ Metals 7' �.. r y i �U Bacteria •rr y ✓ Organics Potential Alternatives �r ME I • Description and Purpose . Prevent, reduce, or eliminate.the discharge of pollutants from material delivery and storage to the stormwater system or watercourses by minimizing the storage of hazardous materials onsite, storing materials in a designated area; installing secondary containment, conducting regular inspections, and training employees and subcontractors. This best management practice covers only material delivery and storage. For.other information on materials, see WM-2, Material Use, or WM-4, Spill .Prevention and Control. For information on wastes, see the waste management BMPs in this section. Legend; ✓ Primary Objective ✓ Secondary Objective Targeted Constituents Sediment ✓ Nutrients fresh r/ Metals Bacteria Oil and Grease ✓ Organics Potential Alternatives None Suitable Applications ' These procedures are suitable for use at all construction sites with delivery and storage of the following materials; ■ Soil stabilizers and binders ' ■ Pesticides and herbicides ' ■ Fertilizers ■ Detergents ' e Plaster • Petroleum products such'as fuel, oil, and grease Iti!4:1 S ' rnia e Asphalt and concrete components rniwater uaflty ' Association January 2003 California Stormwater BMP Handbook 1 of 5 Construction www.cabmpha ndbooks,corn WM-i Material - Delivery and Storage a Hazardous chemicals such as acids, lime, glues, adhesives, paints, solvents, and curing compounds ■ Concrete compounds . i Other materials that maybe detrimental if released to the environment ' Limitations ■ Space limitation may preclude. indoor storage. ' ■ Storage sheds often must meet building and fire code requirements. Irnpiernentation ' The following steps should be taken to minimize risk: ■ Temporary storage area should be located away from vehicular traffic. ' ■ Material Safety Data Sheets (MSDS) should be supplied for all materials stored. ■ Construction site areas should be designated for material delivery and storage, ' ■ Material delivery and storage areas should be located near the construction entrances, away from waterways, if possible. _ Avoid transport near drainage paths or waterways. Surround with earth berms. See EC -:9, Earth Dikes and Drainage Swales. ' . Place in an area which willbe paved. ■ Storage of reactive,'ignitable, or flammable liquids must comply with the fire codes of your area Contact the local Fire Marshal to review site materials, quantities, and proposed ' storage area to determine specific requirements. See the 171ammible and Combustible Liquid Code, NFPAgo. ' r An up to date inventory of materials delivered and stored onsite should be kept. ■ Hazardous materials storage onsite should be mi'i=ed. ' r Hazardous materials should be handled as infrequently as possible.. ■ During the rainy season, consider storing materials in a covered area, Store materials in ' secondary containments such as earthen dike, horse trough, or even a children's wading pool for non-reactive materials such as detergents, oil, grease, and paints. Small amounts *of ' material maybe secondarily contained in "bus boy" trays or concrete mixing trays. ■ Do not store chemicals, drums, or bagged materials directly on the ground. Place these. items on a pallet and, when possible, in secondary.containment, 2 of 5 California Stotmwater BMP Handbook January 2003 Construction y$ www.cabmphandbooks, com Material Delivery and Storage WM=i ■ If drums must be kept uncovered, store them at a slight angle to reduce ponding of rainwater i on the lids to reduce corrosion. Domed plastic covers are inexpensive and snap to the top of drums, preventing water from collecting, ' ■ Chemicals should be kept*in their original labeled containers.. ■ Employees and subcontractors should be trained on the proper material delivery and storage practices, Employees trained in emergency spill -cleanup procedures must be present when dangerous materials or liquid chemicals are unloaded. ■ If significant residual materials remain on the ground after construction is complete, properly remove materials and any contaminated soil. See WM-7,Contaminated Soil Management. If the area is to be paved, pave as soon as materials are removed to stabilize the soil, Material Storage Areas and Practices ■ Liquids, petroleum products, and substances listed in 40 CFR Parts 110, iii, or 302 should be stored in approved containers and drums and -should not be overfilled. Containers and drums should be placed in temporary containment facilities for storage. ■ A temporary containment facility should provide for a spill -containment volume able to contain precipitation from a 25 year storm event, plus the greater of id% of the aggregate volume of all containers or l00% of the capacity of the largest container within its boundary, whichever is greater. ■ A temporary containment facility should be impervious to the materials stored -therein for a minimum contact time of 72 hours. ■ A temporary containment facility should be maintained free of accumulated rainwater and spills. In the event of spills or -leaks, accumulated rainwater and spills should be collected and placed into drums. These liquids should be handled as' a hazardous waste unless- testing determines them to be non-haiardous. All collected liquids or non -hazardous liquids should be sent'to an approved disposal site. ■ Sufficient separation should be -provided between stored containers to allow for spill cleanup and emergency response access. ■ . Incompatible materials, such as chlorine and ammonia, should not be stored in the same temporary containment facility, ■ Throughout the rainy season; each temporary containment facility should be covered during .non -working days, prior to, and' during rain events. ■ Materials should be stored in their original containers and the original product labels should be maintained in place in a legible condition. Damaged or otherwise illegible labels should be replaced immediately,' lanuary 2003 Callfornia Stormwater BMP Handbook 3 of 5 Constructlon 1 www. cab mphandbooks. com WMA Material Delivery and Storage it Bagged and boxed materials should be stored on pallets and should not be allowed to accumulate on the ground, To provide protection from wind and rain throughout the rainy season, bagged and boxed materials should be covered during non -working days and prior to and during rain events, ■ Stockpiles should be protected in accordance with WM-3, Stockpile Management. • Materials should be stored indoors within existing structures or sheds when available. ■ Proper storage instructions should be posted at all times in an open and conspicuous location. i An ample supply of appropriate spill clean up material should be kept near storage areas. A Also see WW -6, Hazardous Waste Management, for storing of hazardous'materials. Material Deiiuery .Practices i Keep an accurate, up-to-date inventory of material delivered and stored onsite: Arrange for employees trained.in.emergency spill cleanup procedures to be present when dangerous materials or liquid chemicals are. unloaded. Spill Cleanup ■ Contain and cleanup any spill immediately. ■ Properly remove and dispose of any hazardous materials or contaminated soil if significant residual materials remain on the ground after construction is complete: See WM-7, Contaminated Soil Management. ■ See WM-4, Spill Prevention and Control, for spills of chemicals' and/or hazardous materials. Cost i The largest cost of implementation maybe in the construction of a materials storage area that is *covered and provides secoudatk containinent. Inspection and Maintenance ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the EMP are under way, inspect weekly during the rainy season and of two-week intervals in the non -rainy season to verify continued BMPimplementation. ■ Keep an ample supply of spill cleanup materials near the storage area, x Keep storage areas clean, well organized, -and equipped with ample cleanup supplies as appropriate for the materials being -stored, E Repair or replace perimeter controls, containment structures, covers, and liners as needed to maintain proper function, 4 of 5 callfornla Stormwater BMP Handbook January 2003 Construction !ik www.ckbmphandbooks.com Material Delivery and Storage. 'WM-1 References Blueprint for a Clean -Bay Best Management. Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpbint Source Pollution Control Program, 1995 Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA, April 1992; Stormwater Quality Handbooks - Construction Site Best Management Practices.(BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000, Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992• January 2003 California Stormwater BMP Handbook 5 of 5 Construction www.cabrnphandbooks,com . Material Use WM-2 Sediment R . Objectives EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS NorrStormwater Management Control WM Waste Management and All Materials Pollution Control Description and Purpose Prevent or reduce the discharge of pollutants to the storm drain system or watercourses from material use by using alternative products, minimizing hazardous material use onsite, and training employees and subcontractors.. Suitable Applications This BMP is suitable for use at all construction projects. These procedures apply when the following materiiYare used or prepared onsite: ■ Pesticides and herbicides ■ Fertilizers ■ Detergents ■ Plaster ■ Petroleum products such as fuel, oil, and grease ■ Asphalt and other concrete components ■ Other hazardous chemicals such as acids, lime, glues, adhesives, paints', solvents, and curing compounds ■ Concrete compounds ■ Other materials that may be detrimental if released to the environment Legend: ' Primary Objective ® Secondary Objective Targeted Constituents Sediment R . Nutrients 0 Trash 0 Metals 0 Bacteria Oil and Grease Q( Organics Cf Potential Alternatives None rAi.IF(7 M .'TnIMWATFR January 2003 Callfbmla Sbormwabrr BMP Handbook 1 of 3 Construction www.cabm.phandbooks.com W-2 Materiel Use ' Limitations Safer alternative building and construction products may not be available or suitable in every ' instance. Implementation ' The following steps should be taken to minimize risk: ■ Minimize use of hazardous materials onsite. ' ■ Follow manufacturer instructions regarding uses, protective equipment, ventilation, flammability, and mix_ng of chemicals. ' ■ Train personnel who use pesticides. The California Department of Pesticide Regulation and county agricultural commissioners license pesticide dealers, certify pesticide applicators, ' and conduct onsite inspections. ■ Do not over -apply fertilizers, herbicides, and pesticides. Prepare only the amount needed. ' Follow the recommended usage instructions. Over -application is expensive and environmentally harmful. Unless on steep slopes, till fertilizers into the soil rather than hydro seeding. Apply surface dressings in several smaller applications, as opposed to one large application, to allow time for infiltration and to avoid excess material being carried ' offsite by runoff Do not apply these chemicals just before it rains. ■ Train employees and subcontractors in proper material use. t■ Supply Material Safety Data Sheets (MSDS) for all materials. ■ Dispose of latex paint and paint cans, used brushes, rags, absorbent materials, and drop ' cloths, when thoroughly dry and are no longer hazardous, with other construction debris. ■ Do not remove the original product label; it contains important safety and disposal ' information. Use the entire product before disposing of the container. ■ Mix paint indoors or in a containmenf'area. Never clean paintbrushes or rinse paint ' containers into a street, gutter, storm drain, or watercourse. Dispose of any paint thinners, residue, and sludges) that cannot be recycled, as hazardous waste. ' ■ For water-based paint, clean brushes to the extent practicable, and rinse to a drain leading to a sanitary sewer where permitted, or into a concrete washout pit or temporary sediment trap. For oil-based paints, clean brushes to the extent practicable, and filter and ieuse ' thinners and solvents. ■ Use recycled and less hazardous products when practical. Recycle residual paints, solvents; ' non -treated lumber; and other materials. ■ Use materials only where and when needed to complete the construction activity. Use safer ' alternative materials as much as possible. Reduce or eliminate use of hazardous materials onsite when practical. 1 2 of 3 Callfbmla StormwaWr BMP Handbook January 2003 Constructlon www.cabmphandbooke.com Material Use WM=2 ■ Require contractors to complete the "Report of Chemical Spray Forms" when spraying herbicides and pesticides. ■ Keep an ample supply of spill clean up material near use areas. Train employees in spill ' cleanup procedures. ■ Avoid exposing applied materials to rainfall and runoff unless sufficient time has been ' allowed for them to dry. Costs ' All of the above are low cost measures. Inspection and Maintenance ■ Inspect and verify that activity -based BMPs are in place prior to the commencement of ' associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and at two—week intervals in the non -rainy season to verify continued BMP implementation. ' ■ Maintenance of this best management practice is minimal, ' ■ Spot check employees and subcontractors throughout the job to ensure appropriate practices are being employed. . References ' Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities: Santa Clara Valley Nonpoint Source Pollution Control Program, ' 1996 Coastal Nonpoint Pollution Control Program: Program Development and Approval Guidance, Working Group Working Paper; USEPA, April 1992. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manu State of California Department of Transportation (Caltrans); November 2000. ' Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992• ' January 2003 Callfornla Stormwaber BMP Handbook 3 of 3 11 t Constrvctlon www.cabmphandbooke.com Stockpile Management Description and Purpose Stockpile Management procedures and practices are designed to, reduce or eliminate air and stormwater pollution from . stockpiles of soil, paving materials such as portland cement concrete (PCC) rubble, asphalt concrete (AC), asphalt concrete rubble, aggregate base, aggregate sub base or pre -mixed aggregate, asphalt minder (so called `bold mix" asphalt), and pressure treated wood. Suitable Applications Implement in all projects that stockpile soil and other materials. Limitations None identified: Implementation Protection of stockpiles is a year-round requirement. To properly manage stockpiles; . iff Locate stockpiles a minimum of 50 ft away from concentrated flows of stormwater, drainage courses, and inlets. W.M-3 Objectives EC Eroslon Control SE Sediment Control. TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and ✓ Materials Pollution Control Legend; ✓ Primary Objective ✓ Secondary Objective Targeted Constituents Sediment J Nutrients Trash ✓ Metals Bacteria Oil and Grease ✓ Organics ✓ potential Alternatives None ■ Protect all stockpiles from stormwater runon using a temporary perimeter sediment barrier such as berms, dikes, fiber rolls, silt fences, sandbag, gravel bags, or straw bale barriers. A S Q A atiforrnia Stormwater Quality Association January 2003 California Stormwater.BMP Handbook 1 of 3 Construction www.cabmphandbooks.com WM-3 stockpile Management x Implement wind erosion control practices as appropriate on all stockpiled material. For ' specific information, see WE -i, Wind Erosion Control; Manage stockpiles of contaminated soil in accordance with WM-7, Contaminated Soil tManagement, ■ Place bagged materials on pallets and under cover, ' Protection ofNon-Active Stockpiles Non-active stockpiles of the identified materials should be protected further as follows: ' Soil stockpiles K During the rainy season, soil stockpiles should be covered or protected with soil stabilization ' measures and a temporary perimeter sediment barrier at all times. ■ During the non -rainy season, soil stockpiles should be covered or protected with a temporary perimeter sediment barrier prior to the onset of precipitation. ' Stockpiles of Portland cement concrete rubble, asphalt concrete, asphalt concrete rubble, aggregate base, or aggregate sub base ' ■ During the rainy season, the stockpiles should be covered or protected with a temporary perimeter sediment barrier at all times. ■ During -the non -rainy season, the stockpiles should be covered or protected -with a temporary perimeter sediment barrier prior to the onset of precipitation. Stockpiles of "cold mix" ' ■ During the rainy season, cold mix stockpiles should be placed on and covered with plastic or' ..comparable material at all times. ■ During -the non -rainy season, cold mix stockpiles should be placed on. and covered with plastic or comparable material prior to the onset of precipitation. Stockpiles/Storage of pressure treated'it ood with copper, chromium, and arsenic or ammonical, copper, zinc, and arsenate ■ During the rainy season, treated wood should be covered with plastic or comparable material at all times, i During the non -rainy season, treated wood should be covered with plastic or comparable material at all times' and cold mix stockpiles should be placed on and covered with plastic or comparable material prior to the onset of precipitation. Protection of Active Stockpiles Active stockpiles of the identified materials should be protected further as follows: All stockpiles should be protected with a temporary linear sediment barrier prior to the onset of precipitation, Stockpiles of "cold mix" should be placed on and covered with plastic or comparable material prior to the onset of precipitation. I of 3 Californiaa-Stormwater BMP' Handbook. January 2003. Construction .www,cabmphandbooks.com 1.y1. Stockpile Management WM-3 Costs All of the above are -low cost measures. Inspection and Maintenance ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and of two-week intervals in the non -rainy season to verify continued BMP implementation ■ Repair and/or replace perimeter controls and covers as needed to keep them functioning properly. References Stormwater Quality Handbooks # Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2Qoo, January 2003 California Stormwater BMP Handbook 3 of 3 ..Construction www,cabmphandbooks,com � Spill Prevention and Control Description and Purpose Prevent or reduce the discharge of pollutants to drainage systems or watercourses from leaks and spills by reducing the chance for spills, stopping the source of spills, containing and cleaning up spills, properly disposing of spill materials, and training employees. This best management practice covers only spill prevention and control. However, WM-I, Materials Delivery and Storage, and WM-2, Material Use, also contain useful information, particularly on spill prevention. * For information on wastes, see the waste management BMPs in this section. Suitable Applications This BMP is suitable for all construction projects. Spill control t procedures are implemented anytime chemicals or hazardous substances are stored on the construction site, including the ' following materials: Soil stabilizers/binders ■ Dust palliatives ■ Herbicides ■ Growth inhibitors ■ Fertilizers ■ Deicing/anti-icing chemicals WM-4 objectives EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and Materials Pollution Control Legend: Q Primary Objective © Secondary Objective Targeted Constituents Sediment Q( Nutrients Q( Trash Q( Metals Bacteria Oil and Grease Organics Potential Alternatives None CUMMA 0DWYAM January 2003 Califomla Stormwater BMP Handbook 1 of 6 �4. Construction www.cabmphandbooks.com Spill Prevention and Control WM-4 ■ Fuels t■ Lubricants t ■ Other petroleum distillates Limitations i In some cases it maybe necessary to use a private spill cleanup company. ' ■ This BMP applies to spills caused b the contractor and subcontractors. P Y ' ■ Procedures and practices presented in this BMP are general. Contractor should identify appropriate practices for the specific materials used or stored onsite Implementation ' The following steps will help reduce the stormwater impacts of leaks and spills; ' Education ■ Be aware that different materials pollute in different amounts. Make sure that each employee knows what a "significant spill" is for each material they use, and what is the ' appropriate response for "significant' and "insignificant" spills; ■ Educate employees and subcontractors on potential dangers to humans and the environment.from spills and leaks. ' ■ Hold regular meetings to discuss and reinforce appropriate -disposal procedures (incorporate into regular safety meetings). ■ Establish a continuing education program to indoctrinate new employees. ■ Have contractor's superintendent or representative oversee and enforce proper spill. ' prevention and control measures. General Measures ' ■ To the extent that the work can be accomplished safely, spills of oil, petroleum products, substances listed under 40 CFR parts 110, 13.7, and 302, and sanitary and septic wastes ' should be contained and cleaned up immediately. ■ Store hazardous materials and wastes in covered containers and protect from vandalism. ' ■ Place a stockpile of spillcleanup materials where it will be readily accessible. ■ Train employees in spill prevention and cleanup. ' ■ Designate responsible individuals to oversee and enforce control measures. ■ Spills should be ' covered and protected from stormwater runon during rainfall to the extent that it doesn't compromise clean up activities. ■ Do not bury or wash spills with water. ' 2 of 6 Callfomla Stormwater BM -P Handbook January 2003 Construction www.cabmphandbooke.com. Spill ill Prevention and Control WM-4 ■ Store and dispose of used cleanup materials, contaminated materials, and recovered spill material that is no longer suitable for the intended purpose in conformance with the ' provisions in applicable BMPs. ■ Do not allow water used for cleaning and decontamination to enter storm drains or ' watercourses. Collect and dispose of contaminated water in accordance withWM-1o, Liquid Waste Management. ' ■ Contain water overflow or minor water spillage and do not allow it to discharge into drainage facilities or watercourses. ' ■ Place proper storage, cleanup, and spill reporting instructions for hazardous materials stored or used on the project site in an open, conspicuous, and accessible location. ' ■ Keep waste storage areas clean, well organized, and equipped with ample cleanup supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function. ' Cleanup ■ Crean up leaks and spills immediately. ' ■ Use a rag for small spills on paved surfaces, a damp mop for general cleanup, and absorbent material for larger spills. If the spilled material is hazardous, then the used cleanup materials are also hazardous and -must be sent to either a certified.laundry (rags) or disposed ' of as hazardous waste. ■ Never hose down or bury dry material spills. Cleanup as much of the material as possible and dispose of properly. See the waste management BMPs in this section for specific information. Minor Spills ■ Minor spills typically involve small quantities of oil, gasoline, paint, etc. which can be controlled by the first responder at the discovery of the spill ■ Use absorbent materials on small spills rather than hosing down or burying the spill ■ Absorbent materials should be promptly removed and disposed of properly. w Follow the practice below for aminor spill:- - pill: - Contain the spread of the spill. - Recover spilled materials. - � Clean the contaminated area and properly dispose of contaminated materials. Serni-Signifteant Spills ■ ; Semi -significant spills still can be controlled by the first responder along with the aid of other -personnel such as laborers and the foreman, etc. This response may require the . cessation of all other activities. ' January 2003 California Sbormwaber BMP Handbook 3 of 6 ;. Construction www.cabmphandbooks.com Spill Prevention - p o and Control INM 4 ' Spills should be cle ■ p aped up immediately: ' - Contain spread of the spill. Notify the project foreman immediately. ' - If the spill occurs on paved or impermeable surfaces, clean up using "dry" 'methods (absorbent materials) cat litter and/or rags). Contain the spill by encircling with . ' absorbent materials and do not let the spill spread widely. - If the spill occurs in dirt areas, immediately contain the spill by constructing an earthen dike. Dig up and properly dispose of contaminated soil. If the spill occurs during rain, cover spill with tarps or other material to prevent ' contaminating runoff. Significant/Hazardous Spills ■ For significant or hazardous spills that cannot be controlled by personnel in the immediate ' vicinity, the following steps should be taken: Notify the local emergency response by dialing 911. In addition to 911, the contractor will ' notify the proper county officials. It is the contractor's responsibility to have all emergency phone numbers at the construction site. Notify the Governor's Office of Emergency Services Warning Center, (916) 846-8911. For spills of federal reportable quantities, in conformance with the requirements in 40 ' CFR parts 110,119, and 302, the contractor should notify the National Response Center at (800) 424-8802. - Notification should first be made by telephone and followed up with a written report. ' - The services of a spills contractor.or a Haz-Mat team should be obtained immediately. Construction personnel should n&iattempt to cleanup until the appropriate and ' qualified staffs have arrived at the job site. Other agencies which may need to be consulted include, but are not limited to, the Fire ' Department, the Public Works Department, the Coast Guard, the Highway Patrol, the City/County Police Department, Department of Toxic Substances, California Division of Oil and Gas, Cal/OSHA, etc. ' Reporting ■ Report significant spills to local agencies, such as the Fire Department; they can assist in ' cleanup. ■ Federal regulations require that any significant oil spill into a water body or onto an ' adjoining shoreline be reported to the National Response Center (NRC) at 8o0 -424-88o2 (24 hours). Use the following measures related to specific activities: t 4of 6 callfomia Sbormwaber BMP Handbook January 2003 Construction www.cabmphandbool<s.com Spill Prevention and Control WM-4 ' Vehicle and E uiP mentMaintenance q ■ If maintenance must occur onsite, use a designated area and a secondary containment, ' located away from drainage courses, to prevent the runon of stormwater and the runoff of spills. ■ Regularly inspect onsite vehicles and equipment for leaks and repair immediately ■ Check incoming vehicles and equipment (including delivery trucks, and employee and subcontractor vehicles) for leaking oil and fluids. Do not allow leaking vehicles or equipment onsite. ■ Always use secondary containment, such as a drain pan or drop cloth, to catch spills or leaks when removing or changing fluids. ■ Place drip pans or absorbent materials under paving equipment.when not in use. ■ Use absorbent materials on small spills rather than hosing down or burying the spill Remove the absorbent materials promptly and dispose of properly. ■ Promptly transfer used fluids to the proper waste or recycling drums. Don't leave full drip pans or other open containers lying around ■ Oil filters disposed of in trashcans or dumpsters can leak oil and pollute stormwater. Place the oil filter in a funnel over a waste oil -recycling drum to drain excess oil before disposal. Oil filters can also be recycled. Ask the oil supplier or recycler about recycling oil filters. ■ Store cracked batteries in a non -leaking secondary. container. Do this with all cracked batteries even if you think all the acid has drained out. If you drop a battery, treat it as if it is cracked. Put it into the containment area until you are sure it is not leaking. Vehicle and EquipmentFueling ' ■ If fueling must occur onsite, use designate areas, located away from drainage courses, to prevent the runon of stormwater and the runoff of spills.. ■ Discourage "topping off' of fuel tanks. ■ Always use secondary containment, such as a drain pan, when fueling to catch spills/ leaks. Costs Prevention of leaks and spills is inexpensive. Treatment and/ or disposal of contaminated soil or water can be quite expensive. Inspection and Maintenance ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and of two-week intervals in the non -rainy season to verify. continued BMP implementation. ■ Inspect BMPs subject to non-stormwater discharge daily while non-stormwater discharges occur. January 2003 California Stormwater BMP Handbook 5 of 6 Construction www.ca bmpha ndbooks.com � .'t I Prevention Spill ent�Pre on and Control WM-4 ■ Keep ample supplies of spill control and cleanup materials onsite, near storage, unloading, and maintenance areas. ■ Update yours ill prevention and control plan and stock cleanup materials as changes occur in the types of chemicals onsite. References Blueprint for a Clean Bay: Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995• tStormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, State of California Department of Transportation (Caltrans), November 2000. ' Stormwater Management for Construction Activities; Developing Pollution Rrevention Plans and Best Management Practice, EPA 832-R-92oo5; USEPA, April 1992• 6 of 6 Callfornla Sbormwaber BMP Handbook January 2003 11, Construction . www.cabmphandbooks.com Solid Waste Management WM05, 3WNi BMP Objectives o S.oll Stabilization o Sediment Control o Tracking- Control o Wind Erosion Control • Non -Storm Water Management s 'Materlals and Waste Management Definition and Solid waste management procedures and practices are designed to minimize or Purpose eliminate the discharge of pollutants to the drainage system or to watercourses" a result of the creation, stockpiling, or removal of construction site wastes, Approprlate Solid waste management procedures and practices are implemented on. all Applications construction projects that -generate solid wastes. Solid wastes include but are not limited to; ■ - Construction wastes including brick, mortar, timber, steel and metal scraps,. sawdust, pipe and electrical cuttings, non -hazardous equipment parts, styrofoam and other materials used to -transportand package construction materials, ■ Highway plLting wastes, including vegetative material, plant containers; and packaging materials,, ■ Litter, including food containers, beverage.cans, coffee cups, paper bags, ' plastic wrappers, and smoking materials, including litter generated by the public. ' Limitations ■ Temporary stockpiling of certain construction wastes may not. necessitate stringent drainage related controls during the non -rainy season or in desert areas with low rainfall. t�Coltrane Storm Water Quo* Handbooks Section 8: Construction Site Best Management Practices Manual Solid Waste Management WM-5 ' March 1, 201-k. 1 of 4 Solid Waste Management m.5 Standards and Education Specifications III The Contractors Water Pollution Control Manager ' g (WPCIVI) shall oversee and enforce proper solid waste procedures and practices, ■ Instruct employees and subcontractors on identification of solid waste and hazardous waste, m Educate employees and subcontractors on solid waste storage and disposal procedures, ■ Hold regular meetings to discuss and reinforce disposal procedures . (incorporate into regular safety meetings). Require that employees and subcontractors follow solid waste handling and storage procedures. ■ Prohibit littering by employees, subcontractors, and visitors, ■ . Wherever possible, minimize production of solid waste materials. Collection, Storage, and Disposal ■ Dumpsters of sufficient size and number shall be provided to contain the solid waste generated by the project and properly serviced. ■ Littering on the project site shall be prohibited, ■ To prevent clogging of the storm drainage sy=and debris removal.from drainage grates, trash racks, and ditch liall be a priority. ' ■ Trash receptacles shall be provided in the Contractor's yard, field trailer areas, and.at locations Where workers congregate for lunch and break periods. ' ■ Construction debris and litter from work.areas within the construction -limits of the project site shall be collected and placed in watertight dumpsters at least weekly regardless of whether the litter was generated by the Contractor, ' the public, or others. Collected litter and debris shall not be placed in or next to drain inlets, storm water drainage systems or watercourses. ' ■ Full dumpsters shall be removed from the project site and the contents shall be disposed of outside the highway right-of-way in conformance with the provisions in the Standard Specifications Section 7-1.13. ' x Litter stored in collection areas and containers shall be handled and disposed of by trash hauling contractors, p ' E Construction debris and waste shall be removed from the site every two weeks oras directed by the RE, Caltrans Storm Water Quality Handbooks Section 8 Construction Slts Best ManagementSe8 Practices Manual Solid waste Management pion March. 1, 200 2 of 4 Solid Waste Management .M-5 . ■ Construction material visible to the public shall be stored or stacked in an orderly manner to the satisfaction of the RE. ■ Storm water run-on shall be prevented from contacting stored solid waste through the use of berms, dikes, or other temporary diversion structures or through the use of measures to elevate waste from site surfaces. ' ■ Solid waste storage areas shall be located at least 15 m (50 ft) from drainage facilities. and watercourses and shall not be.located in areas prone to flooding or ponding. ■ Except during fair weather, construction and highway P g planting waste not stored in watertight dumpsters shall be securely covered from wind and rain ' by covering the waste with tarps or plastic sheeting or protected in 4.. conformance with the applicable Disturbed Soil Area protection section, ' ■ Dumpster'washout on the project site is not allowed. ■ Notify trash hauling contractors that only watertight dumpsters- are acceptable for use on-site. ■ Plan for additional containers during the demolition phase of construction. ■ Plan for more frequent pickup during the demolition phase of construction. ■ Construction waste shall be stored in a designated area approved by the RE. ' . ■ Segregate potentially hazardous waste from non -hazardous construction site waste. ■ Keep the site clean of litter debris ■ Make sure `that toxic liquid wastes (e.g., used oils, solvents, and paints) and 'chemicals (e,g., acids, pesticides, additives, curing compounds) are not disposed of in dumpsters designated for construction debris. ■ Dispose ofnon-hazardous waste in accordance with Standard -Specification 7-1.13, Disposal of Material Outside the Highway Right of Way. ■ For disposal of hazardous waste, see BMP WM-6, "Hazardous Waste ' Management." Have hazardous waste hauled to an appropriate disposal and/or recycling facility. Salvage or recycle useful vegetation debris, packaging and/or surplus building materials When practical. For example, trees and shrubs from land clearing ' can be converted .into wood chips, then used as mulch on graded areas,. Wood pallets, cardboard boxes, and construction scraps can also be recycled. Caltrans Storm Water Quality ' Ha8 Handbooks'. Section Construction 31te Best Management Practices Manual 8olld Waste Management WM�. March 1, 2b0 . 3 of 4 � Solid Waste ManagementM.g Standards and Educdtlon tSpecifications m The Contractor's Water Pollution Control Manager (WPCK shall oversee -and enforce proper solid waste procedures and practices, ' ■ Instruct employees and subcontractors on identification of solid waste and hazardous waste, t■ Educate employees and subcontractors on solid waste storage and disposal procedures, ■ Hold regular meetings to discuss and reinforce disposal procedures g p (incorporate into regular safety meetings). ' v Require that employees and subcontractors follow solid waste handling and storage .procedures, ' ■ Prohibit littering by employees, subcontractors, and visitors, ■ Wherever possible, minimise production of solid waste materials. ' Collection, Storage, and Disposal ■ Dumpsters of sufficient size and number shall be provided to contain the solid ' waste generated by the project and properly serviced. ■ Littering on the project site shallbe prohibited. ■ To prevent clogging of the storm drainage system litter and debris removal. from drainage grates, trash racks, and'ditch lines shall be a priority. ■ Trash receptacles shall be provided in the Contractor's yard, field trailer areas, and. at locations where workers congregate for lunch and break, periods. ■ Construction debris and litter from work areas within the construction'limits of the project site shall be collected and placed in watertight dumpsters at least weekly'regardless of whether the litter was generated by the Contractor, the public, or others. Collected litter and debris shall not be placed in or next to drain inlets, storm water drainage systems or watercourses. ■ Full dumpsters shall be removed from the project site and the contents shall be disposed of outside the highway right-of-way is conformance with the provisions in the Standard Specifications Section 7-1,13, ■ Litter stored in collection areas and containers shall be handled and disposed of by trash hauling contractors, ■ Construction debris and waste shall be removed from the site every two weeks oras directed by the RE. Caltrane Storm Water Quallty Handbooks Section 8 Construction Site Beat Management Practices Manuel Solid Waste -Management WM4 s March, 1, 2l 2 of 4 Solid Waste'Management Maintenance and, ■ The WPCM shall monitor onsite solid waste storage and disposal procedures, .inspection it Police site for litter and debris. Caltrans Storm'Water Quality Handbooks Section 8 Construcoon Site Best Management Practices Manual Solid Waste Management WM-5 March 1, 20P 4 of 4 Concrete Waste Management WM-8, Description and Purpose Prevent or reduce the discharge of pollutants to stormwater from concrete waste by conducting washout offsite, performing onsite washout in a designated area, and training employee and subcontractors. Suitable Applications Concrete waste management procedures and practices are implemented on construction projects where: ■ Concrete is used as a construction material or where concrete dust and debris result form demolition activities ■ Slurries containing portland cement concrete (PCC) or asphalt concrete (AC) are generated, such as frond saw cutting, coring, grinding, grooving, and hydro -concrete demolition i Concrete trucks and other concrete coated equipment are washed onsite ■ Mortar -mixing stations exist ■ See also NS -8, Vehicle and Equipment Cleaning Limitations ■ Offsite washout of concrete wastes may not always be possible: Objectives EC Erosion Control SE Sediment Control TC Tracking Control WE Wind Erosion Control NS Non-Stormwater Management Control WM Waste Management and ✓ Materials Pollution Control Legend: ✓ Primary Objective ✓ Secondary Objective Targeted Constituents Sediment ✓ Nutrients Trash Metals ✓ Bacteria Oil and Grease Organics Potential Alternatives None SQA_ California Stormwater Quality Association January 2003 California Stormwater BMP Handbook 1 of 7 Construction www. cabmphandbooks .com WM-8 Concrete Waste Management Implementation The following steps will help reduce stormwater pollution from concrete wastes: ■ Discuss the concrete management techniques described in this BMP (such as handling of concrete waste and washout) with the ready -mix concrete supplier before any deliveries are made. ■ Incorporate requirements for concrete waste management into material supplier and subcontractor agreements. ■ Store dry and wet materials under cover, away from drainage areas. ■ Avoid mixing excess amounts of fresh concrete. ■ Perform washout of concrete trucks offsite or in designated areas only. ■ Do not wash out concrete trucks into storm drains, open ditches, streets, or streams. ■ Do not allow excess concrete to be dumped onsite, except in designated areas. ■ For onsite washout: - Locate washout area at least 50 feet from storm drains, open ditches, or water bodies. Do not allow runoff from this area by constructing a temporary pit or bermed area large enough for liquid and solid waste. - Washout wastes into the temporary pit where the concrete can set, be broken up, and then disposed properly, ■ Avoid creating runoff by draining water to a bermed or level area when washing concrete to remove fine particles and expose the aggregate. ■ Do not wash sweepings from exposed aggregate concrete into the street or storm drain. Collect and return sweepings to ag&egate base stockpile or dispose in the trash. Education ■ Educate employees, subcontractors, and suppliers on the concrete waste -management techniques described herein. ■ Arrange for contractor's superintendent or representative to oversee and enforce concrete waste management procedures. Concrete Slurry Wastes PCC and AC waste should not be allowed to enter storm drains or watercourses. ■ PCC and AC waste should be collected and disposed of or placed in a temporary concrete washout facility. ■ A sign should be installed adjacent to each temporary concrete washout facility to inform concrete equipment operators to utilize the proper facilities. 2 of 7 California Stormwater BMP Handbook January 2003 Construction www.cabmphandbooks.com Concrete Waste Management WM-8 ' ■ Below grade concrete washout facilities are typical. Above grade facilities are used if excavation is not practical. ' ■ A foreman or construction supervisor should monitor onsite concrete working tasks, such as saw cutting, coring, grinding and grooving to ensure proper methods are implemented. ■ Saw -cut PCC slurry should not be allowed to enter storm drains or watercourses. Residue ' from grinding operations should be picked up by means of a vacuum attachment to the grinding machine. Saw cutting residue should not be allowed to flow across the pavement and should not be left on the surface of the pavement. See also NS -3, Paving and Grinding Operations; and WM-io, Liquid Waste Management. ■ Slurry residue should be vacuumed and disposed in a temporary pit (as describedin OnSite Temporary Concrete Washout Facility, Concrete Transit Truck Washout Procedures, below) and allowed to dry. Dispose of dry slurry residue in accordance with WM-5, Solid Waste Management. ' Onsite Temporary Concrete Washout Facility, Transit Truck Washout Procedures ■ Temporary concrete washout facilities should be located a minimum of 50 ft from storm ' drain inlets, open drainage facilities, and watercourses. Each facility should be located away from construction traffic or access areas to prevent disturbance or tracking. ' ■ A sign should be installed adjacent to each washout facility to inform concrete equipment operators to utilize the proper facilities. ■ Temporary concrete washout facilities should be constructed above grade or below grade at the option of the contractor. Temporary concrete washout facilities should be constructed ' and maintained in sufficient quantity and size to contain all liquid and concrete waste generated by washout operations. ■ Temporary washout facilities should have a temporary pit or bermed areas of sufficient ' volume to completely contain all liquid and waste concrete materials generated during washout procedures. ii ' ■ Washout of concrete trucks should be performed in designated areas only. ' ■ Only concrete from mixer truck chutes should be washed into concrete wash out. ■ Concrete washout from concrete pumper bins can be washed into concrete pumper trucks and discharged into designated washout area or properly disposed of offsite. ■ Once concrete wastes are washed into the designated area and allowed to harden, the concrete should be broken up, removed, and disposed of per WM-5, Solid Waste ' Management. Dispose of hardened concrete on a regular basis. ■ Temporary Concrete Washout Facility (Type Above Grade) ' - Temporary concrete washout facility (type above grade) should be constructed as shown on the details at the end of this BMP, with a recommended minimum length and January 2003 California Stormwater BMP Handbook 3 of 7 . Construction www.cabmphandbooks.com I� WM-8 Concrete Waste Management ' minimum width of io ft, but with'sufficient quantity and volume to contain all liquid and concrete waste generated by washout operations. - Straw bales, wood stakes, and sandbag materials should conform to the provisions in SE - 9, Straw Bale Barrier. - Plastic lining material should be a minimum of io mil in polyethylene sheeting and should be free of holes, tears, or other defects that compromise the impermeability of the material. ' ■ Temporary Concrete Washout Facility (Type Below Grade) - Temporary concrete washout facilities (type below grade) should be constructed as shown on the details at the end of this BMP, with a recommended minimum length and minimum width of io ft. The quantity and volume should be sufficierit'to contain all liquid and concrete waste generated by washout operations. ' - Lath and flagging should be commercial type. - Plastic lining material should be a minimum of io mil polyethylene sheeting and should t be free of holes, tears, or other defects that compromise the impermeability of the material. Removal of Temporary Concrete Washout Facilities ■ When temporary concrete washout facilities are no longer required for the work, the hardened concrete should be removed and disposed of Materials used to construct temporary concrete washout facilities should be removed from the site of the work and disposed of. ■ Holes, depressions or other ground disturbance caused by the removal of the temporary concrete washout facilities should be backfilled and repaired. Costs All of the above are low cost measures. ' Inspection and Maintenance ■ Inspect and verify that activity—based BMPs are in place prior to the commencement of ' associated activities. While activities associated with the BMP are under way, inspect weekly during the rainy season and of two-week intervals in the non -rainy season to verify continued BMP irriplementation. ■ Temporary concrete washout facilities should be maintained. to provide adequate holding capacity with a. minimum freeboard of 4 in. for above grade facilities and 12 in. for below grade facilities, Maintaining temporary concrete washout facilities should include removing ' and disposing of hardened concrete and returning the facilities to a functional condition. Hardened concrete materials should be removed and disposed of. ■ Washout facilities must be cleaned, or new facilities must be constructed and ready for use ' once the washout is 75% full. ' 4 of 7 California Stormwater BMP Handbook January 2003 Construction ' www.cabmph6ndbooks.com Concrete Waste Management WM-8 ' References Blueprint for a Clean Bay, Best Management Practices to Prevent Stormwater Pollution from Construction Related Activities; Santa Clara Valley Nonpoint Source Pollution Control Program, 1995. Stormwater Quality Handbooks - Construction Site Best Management Practices (BMPs) Manual, tState of California Department of Transportation (Caltrans), November 2000. Stormwater Management for Construction Activities; Developing Pollution Prevention Plans and Best Management Practice, EPA 832-R-92005; USEPA, April 1992, t tJanuary 2003 California Stormwater BMP Handbook 5 of 7 Construdlon ' www.cabmphandbooks.com �11i WM-8 Concrete Waste Management LATH & FLAGGIN( ON ALL SIDES BERN v a 10 MIL PLASTIC — .1,— PLAN NOT TO SCALE . TYPE "BELOW GRADE" 1.0' MIN V) LJ a' a STAKE (TYP) \_10 MIL TWO—STACKED PLASTIC LINING 2 X 12 ROUGH WOOD FRAME PLAN NOT TO SCALE TYPE "ABOVE GRADE" NDBAG SANDBAG 10 MIL PLASTIC LININGS SECTION A -A NOT TO SCALE. 10 MIL /---PLASTIC LINING -WOOD FRAME SECURELY FASTENED AROUND ENTIRE PERIMETER WITH TWO STAKES SECTION B=B NOT TO SCALE BERM NOTES 1. ACTUAL LAYOUT DETERMINED IN FIELD. 2. THE .CONCRETE WASHOUT SIGN SHALL BE INSTALLED WITHIN 30 FT. OF THE TEMPORARY CONCRETE WASHOUT FACILITY. 6 of 7 California Stormwater BMP Handbook January 2003 Construction www.cabmphandbooks.com Concrete Waste Management WM-8 o w Q 10 PLASTIC LINING STAPLES (2 PER BALE) PLAN NOT TO SCALE TYPE '"ABOVE GRADE" WITH STRAW BALES NATIVE MATERIAL (OPTIONAL) 10 MIL PLASTIC LINING WOOD OR —J METAL, STAKES (2 PER BALE) SECTION B -B NOT TO SCALE AKE 2° YP) l8" DIA.h:] STEEL WIRE 4 STAPLE DETAIL 1TRAW BALE YP) PLYWOOD 48' X 24" PAINTED WHITE BLACK LETTERS CONCRETE o 6". 'HEIGHT WASHOUT' 0.5" LAG SCREWS 43'-1 WOOD. POST 3'X 3'X 8' CONCRETE WASHOUT SIGN DETAIL (OR EQUIVALENT) BINDING WIRE STRAW BALE NOTES 1. ACTUAL LAYOUT DETERMINED IN FIELD. 2, THE CONCRETE WASHOUT SIGN SHALL BE INSTALLED WITHIN 30 FT. -OF THE TEMPORARY CONCRETE WASHOUT FACILITY. January 2003 California Stormwater BMP Handbook 7 of 7 Construction www.cabmphandbooks.com y II ATTACHMENT «B99 .. .. ._... ,...n ........ ....�..�...�. •.: ria ".'+..r..•�... ....no Gr.. ;.¢.\W,•'Cw! `•t :.. r..7:S: yeYsx•.;t •iK•••1•MSir::... STATE WATER RESOURCES CONTROL BOARD.(SWRCB ) ORDER NO, 99 aQ NATIONAL POLLUTANT DISCHARGE ELMUNATION GENERAL, PERMIT NO. CAS000002 SYSTEM (NPDES) WASTE DISCHARGE REQUIREMENTS (WDRS) FOR DISCHARGES OF STORM WATER RUNOFF ASSOCIATED CONSTRUCTION ACTIVITY WITH The State Water Resources Control-B•bard finds that; ' 1. Federal regulations tot colittblling pollutants in storm water. runoff discharges were promulgated by the U.S. Environmental Protection Agency (USEPA) on November 16, 1990 .(40 Code, of Federal Regulations (CFR) Parts 122, 123, and 124). Tlie ' discharges of storm water to surface waters associated withconstruction aregulations tivity including clearing, grading, and excavation activities (except operations that result in disturbance of less than five acres of total land area and which are not part of a larger common plan of development or sale) to obtain an NPDBS permit and to implement Best Available Technology Economically Achievable (BAT) and Best Conventional Pollutant Control Technology (BCI') to reduce or eliminate storm water pollution. On December 8, 1999 federal regulations promulgated by USEPA (40CFR Parts 9, 122; 123, and. 124) expanded the NPDES storm water ro municipal separate storm sewers terns program to include storm water discharges from Ys (MS4s) and construction sites that were smaller than those previously included in the`program. Federal regulation 40 CFR 122.26 small construction activity as includin clearin § (b)(15) defines ' disturbance of equal to or g g' 8�'�g, and excavating that result in land eq greater than one acre or less than five acres or is part of a larger common plan of development or sale. Permit applications for small constmction activities are due by March 10, 2003. 2. This General Permit regulates pollutants in discharges of storm water associated with ' construction activity (storm water discharges) to surface waters, except from those areas on Tribal Lands; Lake Tahoe Hydrologic Unit; construction projects which disturb less than one acre, unless part of a larger common plan of development or sale; and storm water discharges which are determined ineligible for coverage under this General Pe by.the California. Regional Water Quality Control Boards (RWQCBs). Attachment Int ' contains addresses and telephone numbers of each RWQCB office. 3. This General Permit does not preempt or supersede the authority of local storm water ' management agencies to prohibit,. restrict, or control storm :water discharges to separate storm sewer systems or other watercourses within their jurisdiction, as allowed by State and Federal law. . 4. To obtain authorization. for proposed storm water discharges to surface waters ' to this General Permit, the landowner (discharger) must submit a-Notic ' pursuant e of Intent (N01) with a vicinity map and the appropriate fee to the SWRCB prior to commencement of ' construction activities. In addition, coverage under this General Permit shall not occur . until the applicant develops a Storm Water Pollution Prevention Plan (SWPPP) in accordance with the requirements of Section A of this permit for the project. For ' proposed construction activity conducted on easements or on nearby property by agreement or permission, or by an owner or lessee of a mineral estate (oil, gas, geothermal, aggregate, precious metals, and/or industrial minerals) entitled to conduct the ' activities, the entity responsible for the construction activitymust submit th filing fee and shall be responsible for development of the SWPPP, e NOI and ' 5. If an individual NPDES Permit is'issued to a discharger - g otherwise subject to this General Permit or if an alternative General Permit is subsequently adopted which covers storm ' water discharges regulated by this General Permit, the applicability of this General Permit -to such discharges is automatically terminated on the effective date of the individual permit or the date of approval for coverage under the subsequent General Permit. ' 6. This action to adopt an N1'DESe p rmit is exempt from the provisions of the California Environmental .Quality Act (Public Resources Code Section 21100, et seq;) in accordance with section 13389 of the California Water Code.' 7. The SWRCB adopted the California Ocean Plan, and the RWQCBs have adopted and the SWRCB has approved Water Quality Control Plans (Basin Plans), Dischargers regulated by this General Permit must comply with the water quality standards in these Basin Plans and subsequent amendments thereto. ' 8. The SWRCB finds storm water discharges associated with construction activity to be a potential significant sources of pollutants. -Furthermore, the SV RCB finds that storm water discharges associated with donstruction activities have the -reasonable potential cause or contribute to an excursion above water quality standards for sediment in the water bodies listed in Attachment 3 to this permit, 9. It is not feasible at this time to establish nu' rgeric effluent limitations -for pollutants in storm water discharges from construction activities, Instead, the provisions of this General Permit require implementation of Best Management Practices (BMPs) to control and abate, the discharge of pollutants in storm water discharges. ' 10, Discharges of non - g storm water may necessary for the completion of certain ' construction projects. Such discharges include, but are not limited to: irrigation of vegetative erosion control measures, pipe flushing and testing, street cleaning, and dewatering, Such discharges are authorized by this General Permit as long as they (a) do comply with Section A.9 of this General Permit, (b) do not cause or contribute tb 1 violation of any wateruali q ty standard, (c) do not violate any other provision of this ' General Permit, (d) do not require a non -storm water permit as issued by some RWQCBs, and (e) are not prohibited by a Basin plan, If a non -storm water discharge is subject to a ' separate permit adopted by a RWQCB, the discharge must additionall be the RWQCB permit. Y authorized by ' 11, Following adoption of this General Permit' ,. the RWQCBs shall enforce the provisions herein including the monitoring and reporting requirements, 12, Following public notice in accordance with State and Federal laws and regulations, the ' SWRCB in a public meeting on June 8, 1998, heard and considered all comments, The SWRCB has prep ated.written responses to all significant comments, 13. This Order is an NPDES permit in compliance with section 402 of the Clean Water Act ' (CWA) and shall take effect upon adoption by the SWRCB provided the Regional Administrator of the USEPA has no objection. If the USEPA Regional Administrator ' objects to its issuance, the General Permit shall not become effective until such objection . is withdrawn. ' 1.4. This General Permit does not authorize discharges of fill or dredged material regulated by the U.S,. Army Corps of Engineers under CWA section 404 and does not constitute a waiver of water quality certification under CWA section .401. 15. The Monitoring Programand Reporting Requirements are . modified in compliance with a Judgment in the case of San Francisco BavKeener et al v State Water Resources Control ' Board. The modifications include sampling and -analysis requirements for direct discharges of sediment to waters impaired due -to sediment and for pollutants that. are not visually detectable in runoff that may cause or contribute to an exeeedance of water ' quality objectives. ' 16 Storm water discharges associated with industrial activity that are owned or operated by municipalities serving populations less than 100,000 people are no longer exempt from the need to apply for or. obtain a storm water. discharge permit. A temporary exemption, which was later extended by USEPA, was provided under. section 1068(c) of the ' Intermodal'Surface Transportation and Efficiency -Act TEA of 1 991, Federal regulation 40 CFR § 122.26 e 1)(ii r uires th above municipalities to submit permit 10, 2003. 17 This permxt-may be reopened and modified to inolude different monitoring requirements ' for small construction activity than for colistruction'activity over five (5) acres, , IT IS HEREBY ORDERED that all dischargers who file an NOI indicating their intention to be ' regulated under the provisions of this General Permit shall comply with the following; A, DISCHARGE PROHIBITIONS: 1. Authorization pursuant to this General Permit does not constitute an exemption to ' applicable discharge prohibitions prescribed in Basin Plans, as implemented by the nine.RWQCBs. ' 2. Discharges of material other than storm water which are not otherwise authorized by an NPDES permit to a separate storm sewer system (MS4) or waters of the ' nation are prohibited, except as allowed in Special Provisions for Construction Activity, C.3. 3, Storm water discharges shall not cause or threaten to cause pollution, ' contaminatioin, or nuisance, ' 4, Storm water discharges regulated by this General Permit shall not contain a hazardous substance equal to or in excess of a reportable quantity listed in 40 CFR Part 117 and/or 40 CFR Part 302. B. RECEIVING WATER LIMITATIONS: 1. Storm water discharges and authorized nonstorm water discharges to any surface or ground. water shall not adversely impact human health or the environment. 2. The. SWPPP developed for the construction activity covered by this General ' Permit shall be designed -and implemented- that storm P water discharges and authorized nonstorm water discharges shall' not cause or contribute to an ' exceedance of any applicable water quality standards contained in a Statewide Water Quality Control Plan and/or the applicable RWQCB's Basin Plan. 3, Should it be determined by the discharger, SWRCB, or RWQCB that storm water discharges and/or authorized nonstorm water discharges are causing or - contributing to an exceedance of an applicable water quality standard, the discharger shall: ' a. Implement correctivemeasures immediately following discovery that water. quality standards were exceeded, followed by notification to the RWQCB by telephone as soon as possible but no later than 48 hours after the discharge has been discovered. This notification shall be followed by a ' report within P 14 -calender days to the appropriate RWQCB, unless otherwise directed by the RWQCB, describing (1) the nature and cause of the water quality standard exceedance; (2) the BMPs currently being- , . implemented; (3) any additional BMPs which will be implemented to prevent or reduce pollutants that are causing or contributing to the ' exceedance of water quality standards; and (4) any maintenance. or repair of BMPs. This report shall include an implementation schedule for ' corrective actions and shall describe'the actions taken to reduce'the pollutants causing or'contributirig to the exceedance, ' b. The discharger shall revise its SWPPP and monitoring program immediately after the report.to the RWQCB to incorporate the additional BIvIPs that have been and will be implemented, the implementation ' schedule, and any additional monitoring needed, t C. Nothing in this section shall enforcing prevent the appropriate RWQCB from any provisions of this General Permit while the discharger prepares and implements the above report. ' C. SPECIAL PROVISIONS FOR CONSTRUCTION ACTIVITY; ' L All dischargers shall file an NOI and pay the appropriate fee for construction activities conducted at each site as required by Attachment 2: Notice of Intent_ -'General Instructions. . 2. All dischargers shall. develop and implement a SWPPP in accordance with Section A: Storm Water Pollution Prevention Plan. "The discharger, shall implement controls to ' reduce -pollutants in storm water discharges from their construction sites to the BAT/BCT performance standard. 3. Discharges of non -storm water are authorized only where they do not cause or contribute to a violation of any water .quality standard and are controlled through implementation of appropriate BMPs for elimination or reduction of pollutants. ' Implementation of appropriate BMPs *is' a condition for authorization of non -storm water discharges. Non -storm water discharges and the BMPs appropriate for °their control -must be described in the SWPPP. Wherever. feasible, alternatives which ' do not result in.discharge of non' storm water shall be implemented in accordance with Section A;9, of the SWPPP requirements. ' 4. All dischargers shall develop and implement a monitoring plan in accordance with Section B: Monitoring P oram nd R po�g reporting tRequirements. 5 • All dischargers shall comply with' -the lawful requirements of municipalities, counties, drainage .districts, and other local agencies regarding discharges of ' water to separate storm sewer systems or other watercourses undei their storm jurisdiction, including applicable requirements in municipal storm water management programs developed to. comply with NPDES permits issued by the ' RWQCBs to local agencies. ' 6. All dischargers shall comply with the standard provisions and reporting requirements contained in Section C: Standard Provisions. ' 7. The discharger may terminate coverage for a portion of the project under i General Permit when ownership of a portion of this project has been transferred or. when a phase within this multi -phase project has been completed. When ' ownership has transferred, the discharger must submit to its RWQCB a Chan e of Information Form (COI) Attachment 4 with revised site map and the.riame, g address and telephone number of the new owner(s). Upon transfer of title, the ' discharger should notify the new owners) of the need to obtain coverage under . this General Permit. The new owner must comply.with provisions of Sections A. . 2. (c) and ' B. 2. (b) of this General Permit. To terminate covers a for a S portion.of the project when a phase has been completed, the discharger must submit to its RWQCB a COI with a revised map that identifies the newly delineated site. 8. The discharger may terminate coverage under this General Permit for a complete project by submitting to its RWQCB a Notice of Termination Form (NOT), .and the post -construction BMPs plan according to Section A.10 of this General Permit. Note that a construction project is considered complete only when all Portions of the site have been transferred to a new. owner, or thb following conditions have been met: There is no potential for. construction related storm water pollution b. All elements of the SWPPP have been completed, c• Construction materials and waste have been disposed of properly, ' d• The site is in compliance with all local storm water management requirements, and. ' e. A post-constructio � . n storm water management plan is in place as described in the site's SWPPP. 9• This General Permit expires five years from the date of.adoption. D. REGIONAL WATER QUALITY CONTROL BOARD (RWQCB) AUTHORITIES; ' 1. RW . QCBs shall; ' a. Implement the provisions of this General Permit.' Implementation p tion of this General Permit may include, but is not limited to requesting the submittal ' of SWPPPS, reviewing SWPPPs., reviewing monitoring reports, conducting compliance inspections, and taking enforcement actions. ' b. Issue permits as they deem appropriate to individual dischargers, categories of dischargers, or dischargers in a geographic area, Upon issuance of such permits by a ' RWQCB, the affected dischargers shall no Monger be regulated by this General Permit. 2. RWQCBs may require, on a case-by-case basis, theinclusion of an analysis of ' potential downstream impacts on receiving waterways due to the permitted construction, ' 3, RWQCBs may provide information to dischargers on the development and implementation of SWPPPs and monitoring programs and may require revisions to SWPPPs and monitoring programs. 4. RWQCBs may require dischargers to retain records for'' re than. three years. 5. RWQCBs,may require additional monitoring and reporting rooeg including sampling and analysis of discharges to water bodies listed requirement Attachment 3 to this permit. Additional requirements imposed by the RWQCB ' should be consistent with the overall momtonng.effort inthe receiving waters. ' 6, RWQCBs may issue individual NPDES permits for those construction activities found to be ineligible for coverage under this permit, CERTIFICATION The undersigned, Administrative Assistant to the Board, does hereby certify that the foregoing is a full, true, and correct copy of an order duly and regularly adopted at a meeting of the State Water Resources Control Board held on August 19, 1999. AYE: James M..Stubchaer- Mary Jane Forster John W. Brown Arthur G. B aggett, Jr. N0: None ABSENT: None ABSTAIN: None /s/ Maureen March6 Administrative Assistant to the Board, SECTION A: STORM WATER POLLUTION PREVENTION PLAN Objectives A Storm Water Pollution Prevention Plan (SWPPP) shall be developed and implemented ' to address the specific circumstances for each construction site covered by this General Permit. The SWPPP shall be certified in accordance with the signatory requirements of ' section C, Standard Provision for Construction Activities (9). The SWPPP shall be developed and amended or revised, when necessary, to meet the following objectives: a. Identify all pollutant sources including sources of sediment that may affect the quality of storm water discharges associated with construction activity (storm water discharges) from the construction site, and ' b. Identify non -storm water dischar es g ,and ' C. Identify, construct, implement in accordance with a time schedule, and.mainta.in Best Management Practices (13Ws) to reduce or eliminate pollutants in storm water discharges and authorized nonstorm water discharges from the construction ' site during construction, and d. Develop a maintenance schedule for BNfPs installed during construction designed to reduce or eliminate pollutants after construction is completed (post= construction BMPs). te. Identify a sampling and analysis strategy and sampling schedule for discharges from construction activity which discharge directly into water bodies listed on Attachment 3. (Clean Water Act Section 303(d) [303(d)] -Water Bodies listed for Sedimentation). f. For all construction activity, identify a sampling and analysis strategy and ' sampling schedule for discharges that have been -discovered through monitoring to be potentially contaminated by pollutants nofvigually detectable in the runoff. 2. Implementation Schedule a. For construction activity commencing on or after adoption of this General.Permit, the SWPPP shall -be developed prior to the start of soil=disturbing activity in' accordance with thus Section and shall be implemented concurrently with ' commencement of soil -disturbing activities, b. Existing permittees engaging in construction activities covered under the terms of ' the previous General Construction Permit SWPPP' (WQ Order No.92-08-DWS shall'continue to implement their existing SWPPP and shall implement any necessary revisions to their SWPPP in accordance with this Section of the General Permit in a timely manner, but in no case more than 90 -calender days from the ' date of adoption of this General Permit. ' c. For ongoing construction activity involving a change of ownership of property, the new owner shall'review the existing SWPPP and amend if necessary, or develop a new SWRPP within 45 -calender days. ' d. Existing permittees shall revise their SWPPP in accordance with the sampling and analysis modifications prior to August 1, 2001. For ongoing construction activity ' involving a change of ownership the new owner shall review the existing SWPPP and amend the sampling and analysis strategy, if ' required, within 45 days; For construction activity commencing after the date of adoption, the SWPPP shall be developed in accordance with the modification language adopted. 1 3. Availabili ' The SWPPP shall remain on the construction site while the site is under construction during working hours, commencing with the initial construction activity and ending with termination of coverage under the General Permit. ' 4. Required Chan es a. The discharger shall amend the SWPPP whenever there is a change in construction or operations which may affect the discharge of pollutants to surface waters, -ground waters, or a municipal separate storm sewer system (MS4): The ' SWPPP shall also be amended if the discharger violates any condition of this General Permit 6r has not achieved the general objective of reducing or eliminating pollutants in storm water discharges. If the RWQCB 'determines that the discharger is in violation of this General Permit, the SWPPP shall.be amended and implemented in a timely manner, but in no case more than 14 -calendar days after ii6tification by the RW. QCB. All amendments should be dated and. directly ' attached to the SWPPP. ' b. The RWQCB or local agency with the concurrence of the RWQCB may require the discharger to amend the SWPPP. ' 5. Source Identification The SWPPP shall include: (a) project information and (b) pollutant source identification . ' combined with an itemization of those BMPs specifically chosen to control the pollutants listed. ' a, Project Information. (1) . The SWPPP shall include a vicinity map locating the project site with ' respect to easily identifiable major roadways, geographic features or landmarks, At a minimum, the map must show the construction site ' perimeter, the geographic features surrounding the site,' and the general topography, ' (2) The SWPPP shall include a site map(s) which shows the construction project in. detail, including the.existing and planned paved areas -and buildings. (a) At a minimum, the map must show the construction site perimeter; ' existing and proposed buildings, lots, roadways, storm water. collection. and discharge points; general topography both before and after construction; and the anticipated discharge locations) ' where the storm water from the construction site discharges to a municipal storm sewer system or other water body. ' (b) The drainage patterns across the project area must clearly be shown on the map, and the map must extend as far outside the site Perimeter as necessary to illustrate the relevant drainage areas. Where relevant drainage are as are too large to depict on the map, map notes or inserts illustrating the upstream drainage areas are sufficient, 'c () Temporary ary on-site drainages to carry concentrated flow shall be selected to comply with -local- ordinances, to control erosion, to ' return flows to their natural drainage courses, and to prevent damage,to downstream properties: t 3.. Information presented in the SWPPP may be resented ei . Y . re P they by narrative or by graphics. Where possible, narrative descriptions should be ' plan notes. Nartative descriptions which do not lend themselves to plan notes can•be contained in a separate document which must'be referenced on the plan. b. Pollutant Source and BMP Identification ' The SWPPP shall include a description of potential sources whichare likely to add pollutants to storm.water discharges or which may result iii nonstorm water discharges from the construction site. Discharges originating fromoff=site which flow across or through areas disturbed by construction that may containollutants should be reported to the RWQCB. P" ' The SWPPP shall; (1) Show drainage patterns and slopes anticipated after major grading ' activities are completed, Runoff from off-site areas should be prevented from flowing through areas that have been disturbed by construction ' unless appropriate conveyance. systems are in place. The amount of anticipated storm water run-on must be considered to determine -the appropriateness of the BMPs chosen.. Show all calculations for anticipated ' storm water run-on, and describe all BMPs .implemented to divert off-site drainage described in section A. 5 a. (2) (c) around or through the ' construction project, (2) Show the drainage patterns into each on-site storm water inlet point or receiving water. Show or describe the BMPs that will protect operational' storm water inlets or receiving waters from contaminated discharges other than sediment discharges, such as, but not limited to; storm water with ' elevated pH levels from contact with soil amendments such as lime or gypsum; slurry from sawcutting of concrete or asphalt ;washing of exposed aggregate concrete; concrete rinse water; building washing ' operations; equipment washing operations; minor street washing associated with street delineation; and/or sealing and paving activities occurring during rains. ■ (3) Show'existing site features that, as a result of known past usage, may contribute pollutants to storm water, (e.g., toxic materials that are known to have been treated, stored, disposed, spilled, or leaked onto'the t construction site). Show.or describe the BMPs ' b implemented to rnm,m,ze the exposure of storm water to contaminated soil or toxiamaterials. ' (4) Show. areas designated for r the (a) storage of soil or waste, (b) vehicle storage and.service areas, (c) construction material loading, unloading, and ' access areas, (d) equipment storage, cleaning, and maintenance areas, ' (5) Describd the BWs for eontrol of discharges from waste handling and disposal areas and methods of on-site storage and disposal of construction materials and construction waste. Describe the BMPs designed to ' mize or eliminate the exposure of storm water to construction. materials, equipment, vehicles, waste storage areas, or service areas. The 13MPs described shall be in compliance with Federal, State, and local laws, ' regulations, and ordinances. (6) Describe all post -construction BMPs -for the project, and show the- location ' -of each BMP on the map, (Post -construction BMPs consist of permanent features designed to minimize pollutant discharges, including sediment, from the site after construction has been completed.) Also, describe the ■ agency or parties to be the responsible party for long-term maintenance of these BUTS, ' (7) Show the locations of direct discharge from the construction site into. a Section 303(d) list water body. Show the designated sampling locations in ' the receiving waters, which represent the'prevailing conditions of the water bodies upstream of the construction site discharge and immediately downstream from the last point of discharge. (8) Show the locations designated for sampling the discharge from areas ' identified in Section A. 5. b. (2), (3), and (4) and Section A. 5. c. (1) and (2), Samples shall be taken should visual monitoring indicate that there has been a breach, malfunction, leakage, or spill from a BMP which could ' result in the..discharge in storm water of pollutants that Would -not -be.. visually detectable, or if storm water comes into contact with soil amendments or 'other exposed materials or contamination and is allowed to ' be discharged. Describe the -sampling procedure, location; and rationale, for obtaining the uncontaminated sample of storm water. C. Additional Information (1) . The SWPPP shall include .a narrative description of pollutant sources and BMPs that cannot be adequately communicated or identified on the site map. In addition, a narrative description of preconstruction control ' practices (if any) to reduce sediment and other pollutants in storm water discharges shall be included. ' (2) The SWPPP shall include an inventory v ntory of all materials used and activities' performed durii g construction that have the potential to contribute to the ' discharge of pollutants other than sediment in storm water. Describe the BMPs selected and the basis for their selection to eliminate or reduce these pollutants in the storm water -discharges. ' (3). . The SWPPP shall include* e the following information regarding the construction site surface area: the size (in acres or square feet); the runoff ' coefficient before and after construction, and the percentage,that is impervious (e.g., paved, roofed, etc.) before and after construction. ' (4) The SWPPP shall include a copy of the NOI, and the Waste Dischar e Identification (WDID) number. Should a WDID number not be rec i ed ' from the SWRCB at the time construction commences, the discharger shall include proof of mailing. of the NOI, e.g., certified mail receipt, copy of check, express mail receipt, etc, (5) The SWPPP shall include a construction activity schedule which describes 1 all major activities suchp as mass grading, pavin lot or arcel g improvements at -the site and the proposed time frame to conduct those ' activities. (6) The SWPPP shall list the name and telephone number of the qualified ' person(s) who have been assigned responsibility for prestorm, poststorm, and storm event BMP inspections; and the qualified person(s) assigned responsibility to ensure full compliance with the permit and implementation of all elements of the SWPPP, including the preparation Of the annual compliance evaluation and the elimination of all ' unauthorized discharges, 6..- Erosion Control Erosion control, also referred to as "soil stabilization" is the most effective way to' retain soil and sediment on the construction site. The most efficient way to address erosion control is to preserve existing vegetation. where feasible, to limit disturbance, and to stabilize and revegetate disturbed areas as soon as possible after grading or construction. ' Particular attentionmust be paid to large mass -graded sites where the potential fbr soil exposure to the erosive effects of rainfall and wind is great; Mass graded construction sites may be -exposed for several years while the project is being built out. Thus, thereis potential for significant sediment discharge from the'site to surface waters.. At a minimum, the discharger/operator must implement an effective combination oferosion and sediment control on all disturbed areas duri.ng.the rainy season. These d disturbeareas include rough graded roadways, slopes, . ys,and building pads. Until permanent vegetation is established, soil cover is the most cast :effective and -expeditious 'method. to protect soil particles from detachment and transport by rainfall. Temporary soil stabilization can be the single -most important factor in reducing erosion at. construction sites. The discharger shall consider measures such as: covering with -mulch, ' temporary seeding, soil stabilizers, binders, fiber rolls or blankets, temporary vegetation, permanent seeding, and a variety of other measures. ' The SWPPP shall include a description of the erosion control practices; including a time schedule, to be implemented during construction to minimize erosion on disturbed areas ' of a construction site. The discharger must consider the full range of erosion control BMPs. The discharger must consider any additional site-specific and seasonal conditions when selecting and implementing appropriate BMPs. The abovelisted erosion control tmeasures are examples of what should be considered and are not exclusive of new or innovative approaches currently available or being developed, a, . The SWPPP shall include: (1) An outline of the areas of vegetative. soil cover or native vegetation onsite which will remain undisturbed during the construction project, (2) An.outline of all areas of soil disturbance including out or fill areas which will be stabilized during the rainy season by temporary or permanent erosion control measures, such as seeding, mulch, or blankets, etc. (3) An outline of the areas of soil disturbance, cut, or fill which will be left exposed during any part of the rainy season, representing areas of potential soil erosion where sediment control BMPs are required to be used during construction. (4) A proposed schedule for the implementation of erosion control measures. b. The SWPPP shall include a description of the tWs and control practices to -be used for both temporary and permanent erosion control measures. c: The SWPPP shall include a description of the BMPs to reduce wind erosion at all tunes, with particular attention paid to stock -piled materials. 7. Stabilization (1) All disturbed areas of the construction'site must be stabilized. Final stabilization for the purposes of submitting a NOT is satisfied when. -All soil disturbing -activities are completed AND EITHER OF THE TWO FOLLOWING CRITERIA ARE MET: -A uniform vegetative cover with 70 percent coverage has been established OR: -equivalent stabilization measures have been employed: These, measures include the use of such BMPs as blankets, reinforced channel liners, soil cement, fiber matrices, geotextiles, or other erosion resistant soil coverings or treatments. (2) Where background native vegetation covers less than 100 percent of the surface, such as in and areas, the 70 percent coverage criteria is adjusted as follows: If the native vegetation. covers 50percent of the ground surface, 70 percent of 50.percent (,70 X,50=. 35) would require 35 percent total uniform surface coverage. 8. Sediment Control The SWPPP shall include a description or illustration of BN2s which will be implemented to prevent a net increase of sediment load in storm water discharge relative to preconstruction levels. Sediment control BMPs are required at appropriate locations along the site perimeter and at all operational internal inlets to the storm drain system at ' all times during the rainy season. Sediment control practices may include filtration devices and barriers (such as fiber rolls, silt fence, straw bale barriers, and gravel inlet filters) and/or settling devices (such as sediment traps or basins). Effective filtration ' devices, barriers, and settling devices shall be selected, installed and maintained properly. A proposed schedule for deployment of sediment control BIvIPs shall be included in the ' SWPPP. These are the most basic measures to prevent sediment.from leaving the project site and moving into receiving waters. Limited exemptions may be authorized by the RWQCB when work on active areas precludes the use of sediment control BMPs temporarily. Under these cohditions, the SWPPP must describe a plan to establish perimeter controls prior to the onset of rain. During the nonrainy season, the discharger is responsible for ensuring that adequate sediment control materials are. available-tocontrol sediment discharges at the downgrade perimeter and operational inlets in the event of a predicted .storm. The discharger shall consider a full range. of sediment controls, in addition to the controls listed above, such as straw bale dikes, earth dikes, brush barriers, drainage swales, check dams, subsurface drain, sandbag dikes, fiber rolls, or :other controls,. At a minimum, the discharger/operator must implement an effective combination of erosion and sediment control on all ' . disturbed areas during the rainy season. ' if the 'discharger chooses to rely on sediment basins for treatment purposes, sediment. basins shall, at a minimum, be; designed and maintained as follows: ' Option I: Pursuant to local ordinance for sediment basin design and maintenance, provided that the design efficiency is as protective or more protective of water quality than Option 3. OR Option 2: Sediment basin(s), as measured from the bottom of the basin to the principal outlet, shall have at least a capacity equivalent to 3,600 cubic feet ' of storage per acre -draining into the sediment basin. The length of the basin shall be more than twice the width of the basin.. The length is determined by measuring the -distance between the inlet and the outlet; and the depth must not be less than three feet nor greater than five'feet for safety reasons and for maximum efficiency. M Option 3: Sediment basin(s) shall be designed using the standard equation: As=1.2Q/Ys Where: As is the minimum surface area for trapping soil particles of a certain size; Vs is the settling velocity of the design particle size chosen; and Q=C x I x A where Q is the discharge rate measured in cubic feet per second; C is the runoff coefficient; I is the precipitation intensity for the 10 -year, 6 -hour rain event and A -is the area draining into the sediment basin in acres. The design particle size shall be the smallest soil grain size determined by wet sieve analysis, .or the fine silt sized (0.01mm) particle, and the Vs used shall be 100 percent of the calculated settling velocity: The length is determined by measuring the distance between the inlet and the outlet; the length shall be more than twice the dimension as the width; the depth shall not be less than three feet nor greater than five feet. for safety reasons and for maximum efficiency (two feet of storage, two feet of capacity): The basin(s) shall be -located on the site where it can be maintained on a year-round basis and shall be maintained on a schedule to retain the two feet of capacity; OR Option 4: The use of an equivalent surface area design or equation, provided that the design efficiency is as protective or more protective of water quality than Option 3. A sediment basin shall have;.a means for dewatering within 7 -calendar days following a storm event.. Sediment basins may be fenced if safety (worker or public) is a concern: The outflow from a sediment basin that discharges into a natural drainage shall be :provided with outlet protection .to prevent erosion and scour of the embankment and channel°, t The discharger must consider any additional site=specific and seasonal conditions when selecting and designing sediment control BMPs, The above listed sediment control measures are examples of what should be considered and are not exclusive of new or ' innovative approaches curt�ently available or being developed.. The SWPPP shall include a description of the BMPs to reduce the tracking of sediment ' onto public or private roads at all times. These public and private roads shall be inspected and cleaned as necessary.. Road cleaning BIv2s shall be discussed in the A ' SWPPP and will not rely on'the washing of accumulated sediment or silt into the storm drain system, ' g, Non -Storm Water Management ' Describe all non -storm water discharges to receiving waters that are proposed for the construction project. Non -storm water discharges should be eliminated or reduced to the extent feasible. Include the locations -of such discharges and descriptions of all BMPs designed for the control of pollutants in such discharges, Onetime discharges shall be monitored during the time that such discharges. are occurring. A qualified person should ' be assigned the responsibility for ensuring that no materials other than storm water are discharged in quantities which will have an adverse effect on receiving waters or storm drain systems (consistent with BAT/BCT), and the name and contact number of that ' person should be included in the SWPPP document. Discharging sediment -laden water which will cause or contribute to an exceedance of the ' applicable RWQCB's Basin Plan from a dewatering site or sediment basin into any receiving water or.storm drain without filtration or equivalent treatment is prohibited. ' 10. Post -Construction Storm Water Management The SWPPP shall include descriptions of the BMPs to reduce pollutants in storm water discharges after all construction phases have been completedat the site (Post - Construction BMPs). Post=Construction BMPs include the minis ation of land disturbance, the minimization of impervious surfaces, treatment of storm waterrunoff using infiltration, detention/retention,. biofilter BMPs, use of efficient irrigation systems, ensuring that interior drains are not connected to a storm sewer system, and appropriately designed.and constructed energy dissipation devices. These mustbe.consistent with all ' local post -construction storm water management requirements, policies, and guidelines. . The discharger must consider: site-specific and seasonal conditions when designi ig the control practices. Operation and.maintenance of control practices after construction is ' completed shall be addressed, including' short -and' long-term funding sources and the responsible party, 11, Maintenance, Inspection; and Repair ' The SWPPP shall include a discussion of the program to inspect and maintain all BMPs as identified in the site plan or other narrative documents throughout the entire duration of the project: A.qualified person will be assigned the responsibility to conduct ' inspections. The name and telephone number of that person shall be listed in the SWPPP document, Inspections will be performed before and after storm events and once each 24-hour period during extended -storm events to identify BMP effectiveness and ' implement repairs or design changes as soon as feasible depending upon field conditions. s Equipment, materials, and workers must be available for rapid response to failures and emergencies. All corrective maintenance to BMPs shall be performed as soon as possible after the conclusion of each storm depending upon worker safety. ' For each inspection required above, the discharger shall complete an inspection checklist, At a minimum, an inspection checklist shall include: a. Inspection date, Weather information: best estimate of beginning. of storm event, duration of event, time elapsed since last storm, and approximate amount of rainfall (inches), 'C. A description of any inadequate BN Ps. d. If it is possible to safely access during inclement weather, list observations of all . ' 13Ws: erosion controls, sediment controls, chemical and waste controls, and non -storm water controls. Otherwise, list result of visual inspection at relevant outfall, discharge point, or downstream location and projected required ' maintenance activities. ' e. Corrective actions required, including any changes to SWPPP necessary and implementation dates. f. Inspectors name, title,. and- signature. .The dischargers shall prepare their inspection checklists using the inspection checklist form provided by the SWRCB or RWQCB or on forms that contain the equivalent information 1.2. Training Individuals responsible for SWPPP preparation, implementation, and permit compliance shall be appropriately trained, and the SWPPP shall document all training. This includes those personnel responsible for installation, inspection, maintenance, and repair of BN2s. Those responsible for overseeing, revising, and amending the SWPPP shall also * . document°their training. Training should be both formal and informal, occur on an ongoing basis when it is appropriate and convenient, and should include training/workshops offered by the SWRCB, RWQCB, or other locally recognized agencies or professional organizations. 11 List of Contractors/Subcontractors The SWPPP .shall include a list of names of all contractors, (or subcontractors) and individuals responsible for irnplernentation of the SWPPP. This list should include telephone numbers and addresses. Specific areas of responsibility of each subcontractor and emergency contact numbers should also be included. 47 ' 14, Other Plans ' This SWPPP may incorporate by reference the appropriate elements of other plans required by local, State, or Federal agencies. A copy of any requirements incorporated by reference shall be kept at the construction site, ' 15. Public Access ' The SWPPP shall be provided, upon request, to the RWQCB. The SWPPP is considered a report that shall be available to the public by the RWQCB under section 308(b) of the ' Clean Water Act. 16, Preparer Certification 1 The. SWPPP and each amendment. shall be signed b the landowner (discharger) or his Y ( g ) representative and include the date of initial preparation and the date of each amendment. ' SBCTION B; MONITORING PROGRAM AND REPORTING REQUIREMENTS ' 1. Required Changes The RWQCB may require the discharger to conduct additional:site inspections, to submit reports and certifications, or perform sampling and analysis. 2. Implementation ' a. Ther wire eq ments of this Section shall be nnplemented at the time of commencement of construction activity (see also Section A. 2. Implementation ' Schedule). The discharger is responsible for implementing these requirements . until construction activity is complete and the site is stabilized. ' b. Fot .ongoing construction activity involving a change in ownership of g P property covered by this General Permit, the new owner must complete a NOI and ' . implement the requirements of this Section concurrent with the:change of ownership. For changes of information, the owner must follow instructions in C.-7. Special Provisions for Construction Activity of the General Permit. ' 3. Site *Inspections ' Qualified personnel shall conduct inspections of the construction site prior to anticipated storm events, during extended storm events, and after actual stotm events to identify areas ' contributing to a discharge of storm water as so ciated. with construction activity: The ' name(s) and contact number(s) of the assigned inspection personnel shall be listed in the MPP. Pre -storm inspections -are to ensure that BMPs are properly installed and maintained; post -storm inspections are to assure that the BMPs have functioned ' adequately, During extended storm events, inspections shall be required each 24-hour period. Best Management Practices (BMPs) shall be evaluated for adequacy and proper implementation and whether additional BMPs are required in accordance with the terms ' of the General Permit (see language in Section A. 11. Maintenance, Inspection, and Repair), Implementation of nonstorm water discharge BMPs shall be verified and their ' effectiveness evaluated, One time discharges of non -storm water shall be inspected when such discharges occur. 4. Compliance Certification Each discharger or qualified assigned personnel listed by name and contact number. in the SWPPP must certify annually that construction activities are iii compliance with the requirements of this General Permit and the SWPP.P. This Certification shall be based upon the site inspections required in Item 3 of this Section. The certification must be ' completed by July 1 of each year. '5_ Noncompliance Reporting Dischargers who cannot certify compliance, in -accordance with Item 4 of this Section and/or who have had other instances of noncompliance excluding exceedances of water quality standards as defined in section B. 3. Receiving Water Limitations Language, shall notify the appropriate RWQCB within 3 0 days. - Corrective measures should be implemented immediately following discovery that water quality standards were exceeded. The notifications shall identify the noncompliance event, including an initial assessment of any impact caused by the. event; describe the actions necessary to aghieve compliance; and include a time schedule subject to the modifications by the RWQCB indicating when compliance will be achieved. Noncompliance notifications must be. submitted within 30 -calendar days of identification of noncompliance. ' 6.. Monitoring Records Records of all inspections, compliance.certifications, and noncompliance -reporting must be.retained for a period of at least three years from the date generated. With the - exception of noncompliance reporting, dischargers are not required to submit these records, ' T Monitoring Program for Sedimentation/Siltation Dischargers of storm water associated with construction activity that -directly enters a. water body listed in Attachment 3 shall conduct a sampling and analysis program for the pollutants.(sedimentation/siltation or turbidity) causing the impairment. The*discharger shall monitor for the applicable parameter. If the water body is listed. for sedimentation- or A A siltation, samples should be analyzed for Settleable Solids (ml/.1) and Total Suspended Solids (mg/1), Alternatively or in addition, samples maybe analyzed for suspended sediment concentration according to ASTM D3977-97, If the water body is listed for ' turbidity, samples should be analyzed for turbidity (NTU). Discharges that flow through tributaries that are not listed in Attachment 3 or that flow into Municipal Separate Storm ' Sewer Systems (MS4) are not subject to these sampling and analysis requirements, The sampling and analysis parameters and procedures must be designed to determine whether the BMPs installed and maintained prevent discharges of sediment from contributing to ' impairment in receiving waters, Samples shall be collected during the first two hours of discharge from rain events which tresult in a direct discharge to any water body listed in Attachment 3. Samples shall be collected during daylight hours (sunrise to sunset). Dischargers need not collect more than four (4) samples per month, All samples shall betaken in the receiving waters and ' shall be representative of the prevailing conditions of the water bodies. Samples shall be collected from safely accessible locations upstream of the construction site discharge and immediately dowtstream froYn the last point of discharge. For laboratory analysis, all sampling, sample preservation, and analyses must be conducted according to test procedures under 40 CFR Part -136. Field samples'shall be collected and analyzed according to the specifications of the manufacturer of the sampling devices employed. Portable meters shall be calibrated according to manufacturer's specification. All field and/or laboratory analytical data shall be kept in ' the SWPPP document, which is to remain at the construction site at all times until a Notice of Termination has been submitted and approved. ' 8. Monitorin Pro' am for P e ollutants Not -Visually Detectable in Storm Water ' A sampling and analysis program shall be developed and conducted for pollutants which are not visually detectable -in storm water discharges, which are or should be known to occur on the construction site, and which could cause .or contribute to an exceedance of ' water quality objectives in the receiving water. Pollutants that should be considered for inclusion in this samplingand analysis program are those identified in Sections A.5.b. ' and A.S.C. Construction materials and compounds that are not stored in water -tight containers under ' a water -tight roof or inside a building are examples of materials for which the discharger may have to implement sampling and analysis procedures. The goal of the sampling and analysis is to determine whether the BMPs employed and maintained on site are effective ' in preventing the -potential pollutants from coming in contact with stormwater and causing or contributing to an exceedance of water quality objectives in the receiving waters, Bxamples of construction sites that may require sampling and- analysis include; sites that are known to have contaminants spilled or spread on the ground; sites where construction practices include the application of soil amendments, such as gypsum, which ' can increase the pH of the runoff; or sites having uncovered stockpiles of material - CA exposed to storm water. Visual observations before, during, and after storm events may trigger the requirement to collect samples. Any breach, malfunction, leakage, -or spill. observed which could result in the discharge of pollutants to surface waters'that would not be visually detectable in storm water shall trigger the collection of a sample of discharge. Samples shall be collected at all discharge locations which drain the areas identified by -the visual observations and which can be safely accessed. For sites where sampling and analysis is required, personnel trained in water quality sampling procedures shall collect storm water samples. A sufficiently large sample of storm water -that has not come in contact with the disturbed soil or the materials stored or used on-site (uncontaminated sample) shall be collected for comparison with the discharge sample. Samples shall be collected during the first two hours of discharge from rain events that occur during daylight hours and which generate runoff. The uncontaminated sample shall be compared to the samples of discharge using field analysis of through laboratory analysis. Analyses may include, but are not limited to, indicator parameters such as; pH, specific conductance, dissolved oxygen, conductivity, salinity, .and TDS. For laboratory analysis, all sampling, sample preservation, and analyses must be conducted according to test procedures under 40 CFR Part 136. Field discharge samples shall be collected and analyzed according to the specifications .of the manufacturer of the sampling devices employed. Portable meters shall be calibrated according to manufacturer's specification. All field and/or analytical data shall be kept in the: SWPFP document, which is to remain at the construction. site at -all times until a Notice of Termination has been submitted and approved. SBCTTON C; STANDARD PROVISIONS FOR CONSTRUCTION ACTIVITY ' 1. Duty to Comte The discharger must comply with all of the conditions of this General Permit. Any permit noncompliance constitutes a violation of the'Clean Water Act (CWA) and the Porter -Cologne Water Quality Control Act and is grounds for enforcement action and/or ' removal from General Permit coverage.. The discharger shall comply with effluent standards or prohibitions established under ' Section 307(a) of the CWA for toxic pollutants within the time provided in the regulations that establish these standards or prohibitions, even if this General Permit has ' not yet been modified to incorporate the requirement. 2. General Permit Actions ' This.. General Permit maybe modified, revoked and reissued, or terminated for cause. The filing of a request by the discharger for a General Permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not annul any General Permit condition, ' if any toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) is promulgated under Section 3.07(a) of the C.WA for a toxic pollutant which is present in the discharge and that standard or ' prohibition is more stringent than any limitation on the pollutant in this General Permit, this General Permit shall be modified or revoked and reissued to conform to the toxic ' effluent standard or prohibition and the dischargers so notified. 3. Need to Halt or Reduce Activity Not a Defense tIt shall not be a defense'for a discharger in an enforcement action on that it would have been necessary to halt or reduce the permitted activity in order to maintain compliance with the ' conditions of this General Permit. - 4. Duty to Mitigate ' The discharger shall all take all responsible steps to minimize or prevent any discharge in violation of this General Permit, ' which has a reasonable likelihood of adversely affecting human health or the. environment, 5. Proper Operation and Maintenance The discharger shall at all times properly operate and maintain any facilities and systems of treatment and control (and related appurtenances) which are installed or used by the ' . discharger to achieve compliance with the conditions of this General Permit and with the requirements of Storm Water Pollution Prevention Plans (SWPPP). Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance ' procedures. Proper operation and maintenance may require the operation of backup or auxiliary facilities or similar systems installed by a discharger when necessary to achieve ' compliance with the conditions of this General Permit. 6. Property Rights ' Thise G neral Permit does not convey any property rights of any sort or any exclusive privileges, nor does it authorize ' any injury to private property or any invasion of personal rights, nor does it authorize any infringement of Federal, State, or local laws or regulations, ' 7. Duty to Provide -Information ' The discharger shall famish the RWQCS, State -Water Resources Control Board, or. USEPA, within. a reasonable time, any requested information to determine compliance with this General Permit. The discharger shall also furnish, upon request, copies of records required to be kept by this General Permit. Inspection and Entry . ' The discharger shall allow the RWQCB, SWRCB, USBPA, and/or, in the case of construction sites which discharge through a municipal separate storm sewer, an authorized representative of the municipal operator of the separate storm sewer system ' receiving the discharge, upon the. presentation of credentials and other documents as may be required by law, to: ' a. Enter upon the discharger's premises at reasonable tunes where a regulated construction activity is being conducted or where records must be kept under the ' conditions of this General Permit; b. Access and copy at reasonable times any records that must be kept under the ' conditions of this General Pem' -dt; C. Inspect. at reasonable times the complete construction site, including any off-site ' staging areas or material storage areas, and the erosion/sedimetit controls; and d. Sample or monitor at reasonable times for the purpose of ensuring General:Permit compliance. 9. 'Signatory Requirements a. All Notice of Intents (NOIs), Notice of Terminations (NOTs), SWPPPs, certifications, and reports -prepared in accordance with this brd.ar submitted to the SWRCB shall be signed as follows: (1) For a corporation: by a responsible corporate officer. For the purpose of this. Section, a responsible corporate officer means: (a) a president, secretary, treasurer, or vice president of the corporation in charge of a principal.business function, or any other personwho performs similar policy or decision=making functions for the corporation, or (b) the manager of the construction activity if authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.; (2) For a partnership or sole proprietorship: by a general partner or* the proprietor, respectively; or (3) For a municipality, State, Federal, or other public agency: by either a principal executive officer, ranking elected official; or duly authorized I 53 representative. The principal executive officer of a Federal. agency includes the chief executive officer'of the agency or the senior executive officer having responsibility for the overall operations of a principal ' geographic unit of the agency. (e,g,, Regional Administrator of USEPA), ' b. All,SWPPPs, reports, -certifications, or other information required by the General Permit and/or requested by the RWQCB, SWRCB, USEPA, or the local storm water management agency shall be signed by a person described above or by a ' duly authorized representative, A person is a duly authorized representative if: (1) The authorization is made in writing by a person described above and tretained as part of the SWPPP; or (2) The authorization specifies either an individual. or a position having ' responsibility for the overall operation of the construction activity, such as the position of manager, operator, superintendent, or position of equivalent responsibility, or an individual or position having overall responsibility for ' environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a ' named position). c. If an authorization is no longer accurate because a different individual or position has responsibility for the overall operation of the construction activity, a new ' authorization must be attached to the SWPPP prior to submittal of any reports, information, or certifications to be signed by the authorized .representative. ' 10. Certification Any person signing documents under Section Q. Provision 9 above, shall make the ' following certification: ' I certify under -penalty of law that this document and all attachments -were-prepared• under my direction or supervision in 'accordance'with a system designed to assure that qualified personnel properly gather and evaluate the information submitted Based on my ' inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and'belief, the information submitted is, true; accurate, and complete, I am aware that there are significant penalties for submitting false information, including ' the possibility of fine and imprisonment for knowing violations," CZ l Anticip ated Noncompliance The discharger will give advance notice to the P WQCB and local storm water management agericy of any planned changes in.the construction activity which may result ' in noncompliance with General Permit requirements. 12, Penalties for Falsification of Reports Section 309(c)(4) of the CWA provides that any person who knowingly makes any false ' material statement, representation, or certification in -any record or other document submitted or required to be maintained under this General Permit, including reports of compliance or noncompliance shall upon conviction, be punished by a fine of not more than $10,000 or by imprisonment for not more than two years or by both. ' 13. Oil and Hazardous Substance Liability Nothing in this General Permit shall be construed to preclude the institution of any legal ' action or relieve the discharger. from any responsibilities, liabilities, or penalties to which the discharger is or may be subject to under Section 311 ofthe CWA. ' 14. Severability The provisions of this General Permit are severable; and, if any provision of this General ' Permit or the application of any provision of this .General Permit to any circumstance is held invalid, the application of such provision to other circumstances and the remainder of this General Permit shall not be affected thereby, - 15. Reopener Clause ' This General Permit may be modified, revoked and reissued, or terminated for cause due to promulgation of amended regulations, receipt of USEPA guidance concerning regulated activities, judicial. decision, or in accordance with 40 Code of Federal Regulations .(CFR) 122.62, 122.63, 122.64, and 124.5. 16. Penalties for Violations of Permit Conditions a. Section 309 of the CWA provides significant penalties for any person who violates a permit condition implementing Sections 301, 302, 306, 307, 308, 318, or 405 of the CWA or any permit condition or limitation implementing any such section in a permit issued under Section 402. Any person who violates any permit ' condition of this General Permit is subject to a civil penalty not to exceed. $27,500 per calendar day of such violation, as well as any other appropriate sanction -provided by Section 309 of the CWA. 55 b, The Porter -Cologne Water Quality Control Act also provides for civil and criminal penalties which in some cases are greater than those under the CWA, 17, Availability A copy of this General Permit shall be maintained at the construction site during construction activity and be available to operating personnel, I& Transfers This General Permit is not transferable. A new owner of an ongoing construction activity must submit a NOI in accordance with the requirements -of this General -Permit to be authorized to discharge under this General Permit, An owner who sells property covered by this General Permit shall inform .the new owner of the duty to file a NOI and shall provide the new owner with a copy of this .General Permit. 19, Continuation of Expired Permit This General Permit continues in force .and effeot until a new General Penit is issued or the SWRCB ' rescinds this General Permit. Only those dischargers authorized to discharge under the expiring General Permit are covered by the continued General Permit. ATTACHMENT «C99 State Water Resources Control Board ' Winston H. Hickox Division of Water Quality Gray Davis Secre10011 Street • Sacramento, California 95814. 916 341-5537 Governor neuro mentaryfor Mailing Address: P.O. Box 1977 • Sacramento, California • 95812-1977 Environmental Protection FAX (916) 341-5543 • Internet Address: http://www.swreb.ca.gov ' ' To: CONSTRUCTION STORM WATER DISCHARGER ' SUBJECT: CHECKLIST FOR SUBMITTING A NOTICE OF INTENT In order for the State Water. Resources Control Board to expeditiously process your Notice of ' Intent (NOI), the following items must be submitted to either of the addresses indicated below: I. X NOI (please keep a copy for your files) with all applicable sections completed ' and original signature of the landowner or signatory agent; 2. ► Check made out to the "State Water Resources Control Board" for $2,133.00; ' and 3. X Site Map of the facility (see NOI instructions). DO NOT SEND BLUEPRINTS U.S. Postal Service Address Overnight Mailing Address 1 State Water Resources Control Board State Water Resources Control Board Division of Water Quality Division Of Water Quality. ' Attn- Storm Water Section Attn: Storm Water, 15th Floor P.O. Box 1977 10011 Street tSacramento, CA 95812-1977 Sacramento, CA 95814 t NOIs are processed in the order they are received. A NOI receipt letter will be mailed to the land owner within approximately two weeks. Incomplete NOI submittals will. be returned to the landowner's address within the same timeframe and will specify the reason(s) for return. If you ' need a receipt letter by a specific date (for example, to provide to a local agency), we advise that you submit your NOI thirty (30) days prior to the date the receipt letter is needed. ' Please do not call us to verify your NOI status. A copy of your NOI receipt letter will be available on our web page within twenty-four (24) hours of processing. Go to: htti):Hesm.r.swrcb.ca.gov:7778/dwq/ConReceiptLetter asp to retrieve an electronic copy of your ' NOI receipt letter. If you have any questions regarding this matter, please contact us at (916) 341- 5537. Slate Water Resources Control Board NOTICE OF INTENT TO COMPLY WITH THE TERMS OF THE GENERAL PERMIT TO DISCHARGE STORM WATER ' ASSOCIATED WITH CONSTRUCTION ACTIVITY (WQ ORDER No. 99-08-DWQ) I. NOI STATUS SEE INSTRUCTIONS ' MARK ONLY ONE ITEM 1. New Construction 2. II. PROPERTY OWNER of Information for WDID# Name Contact Person SIGNALIZED INTERSECTION WEST, L.L.C. DAN AND BEN ALLEN Mailing Address (Contact) Title 15644 POMERADO RD, SUITE 303 SUBDIVIDER City State Zip Phone (Contact) POWAY CA 92064 (858) 487-9222 III. DEVELOPER/CONTRACTOR INFORMATION Developer/Contractor SAME AS OWNER Contact Person Mailing Address Title City State I Zip Phone IV. CONSTRUCTION PROJECT INFORMATION ' ■ Site/Project Name Site Contact Person CENTERVILLE RESIDENTIAL SUBDIVISION DAN AND BEN ALLEN Physical Address/Location Latitude Longitude County WEST SIDE OF CENTERVILLE ROAD, SOUTH OF DOE MILL ROAD 39:77640° 121.6728° BUTTE City (or nearest City) Zip Site Phone Number Emergency Phone Number CHICO 95973 (858) 487-9222 (858) 487-9222 A. Total size of construction site area: C. Percent of site Imperviousness (including rooftops): 80.00 Acres D. Tract Number(s): Before Construction: 0% B. Total area to be disturbed: 9.11 Acres (11% of total) After Construction: 2% E. Mile Post Marker: F. Is the construction site part of a larger common plan of development or sale? G. Name of plan or development El YES E NO J. Projected construction dates: H. Construction commencement da I. % of site to be mass graded: 5% te: 4/15/05 Complete grading: 5/30/05 Complete project: 5101/06 K. Type of Construction (Check all 1. Residential that apply): 2. El commercial 3. [:1 Industrial 4. ❑ . Reconstruction 5. ❑ Transportation 8. Utility Description: V. BILLING INFORMATION SEND BILL TO. N OWNER ame Contact Person (as in II. above) DEVELOPER ❑ Mailing Address Phone/Fax as in III. above ❑ OTHER City State Zip enter information atright) RESIDENTIAL UTILITY SERVICES 7. ❑ Other (Please List): DAN AND BEN ALLEN Physical Address/Location Latitude Longitude County WEST SIDE OF CENTERVILLE ROAD, SOUTH OF DOE MILL ROAD 39:77640° 121.6728° BUTTE City (or nearest City) Zip Site Phone Number Emergency Phone Number CHICO 95973 (858) 487-9222 (858) 487-9222 A. Total size of construction site area: C. Percent of site Imperviousness (including rooftops): 80.00 Acres D. Tract Number(s): Before Construction: 0% B. Total area to be disturbed: 9.11 Acres (11% of total) After Construction: 2% E. Mile Post Marker: F. Is the construction site part of a larger common plan of development or sale? G. Name of plan or development El YES E NO J. Projected construction dates: H. Construction commencement da I. % of site to be mass graded: 5% te: 4/15/05 Complete grading: 5/30/05 Complete project: 5101/06 K. Type of Construction (Check all 1. Residential that apply): 2. El commercial 3. [:1 Industrial 4. ❑ . Reconstruction 5. ❑ Transportation 8. Utility Description: V. BILLING INFORMATION SEND BILL TO. N OWNER ame Contact Person (as in II. above) DEVELOPER ❑ Mailing Address Phone/Fax as in III. above ❑ OTHER City State Zip enter information atright) II.:: REGULAI UKY 5TATU5 A. Has a local agency approved a required erosion/sediment control plan?............................................................................................................................. YES ❑ NO Does the erosion/sediment control plan address construction activities such as Infrastructure and structures?.................................................................. E YES ❑ NO Name of local agency: CITY OF CHICO Phone: ( 530 ) 879.6900 B: Is this project or any part thereof, subject to conditions imposed under a CWA Section 404 permit of 401 Water Quality Certification? .............................. ❑ YES ONO If yes, provide details: VII. RECEIVING WATER INFORMATION ■ A. Does the storm water runoff from the construction site discharge to (Check all that apply): 1. Indirectly to waters of the U.S. ' 2. ❑ Storm drain system - Enter owner's name: 3. ❑ Directly to waters of U.S. (e.g. , river, lake, creek, stream, bay, ocean, etc.) B. Name of receiving water: (river, lake, creek, stream, bay, ocean): BUTTE CREEK ' VIII. IMPLEMENTATION OF NPDES PERMIT REQUIREMENTS A. STORM WATER POLLUTION PREVENTION PLAN (SWPPP) (check one) ' ❑ A SWPPP has been prepared for this facility and is available for review: Date Prepared: / / Date Amended: A SWPPP will be prepared and ready for review by (enter date): SEPTEMBER 9, 2005 ' ❑ A tentative schedule has been included in the SWPPP for activities such as grading,street construction, home construction, etc. B. MONITORING PROGRAM A monitoring and maintenance schedule has been developed that Includes inspection of the construction BMPs before anticipated storm events and after actual stone events and is available for review. ' If checked above: A qualified person has been assigned responsibility for pre -storm and post -storm BMP Inspections to Identify effectiveness and necessary repairs or design changes........................................................................................................ N YES ❑ NO Name: DAN AND BEN ALLEN Phone: ( 858) 487-9222 ' C. PERMIT COMPLIANCE RESPONSIBILITY A qualified person has been assigned responsibility to ensure full compliance with the Permit, and to Implement all elements of the Storm Water Pollution Prevention Plan including: ' 1. Preparing an annual compliance evaluation.........................................................................................................................:................. YES ❑ NO Name: DAN AND BEN ALLEN Phone: ( 858) 487.9222 ' 2. Eliminating all unauthorized discharges...................................................................................................................................................■ YES ❑ NO 'IA. VICINITY MAP AND FEE (must show site location in relation to nearest named streets, intersections, etc.) . Have you included a vicinity map with this submittal?...................................................................................................................................... 0 YES ❑ NO Have you included payment of the annual fee with this submittal?................................................................................................................... E YES ❑ NO V i►r nr�r���r��un "I certify under penalty of law that this document and all attachments were prepared under my direction and supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the' system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment. In addition, I certify that the provisions of the permit, including the development and implementation of a Storm Water Pollution Prevention Plan and a Monitoring Program Plan will be complied with." Printed Name: n ,QM �- Q n'e�., Signature: Date: 9- �3-zos- Title: i CENTERVILLE RESIDENTIAL :DEVELOPMENT .S� NO SCALE " �., TOWN OF- PARADISE:' F_PARADISE: LOCATION Pi MAP /� 0-'--)-!5- a- - '--)-!5- n Z ' a-cw.. IJJ9./5(RI. c.e. In6 c•r. c.w,ln6 c..2 saM NB7'IB'S4'EfR) a•,. 1, c Svc fB Nel•le'JI-chl _ -X P T a 520.00 ml 1 BASIS OF BEARING 0 % The Well I.M. of the S.C. 1/4 of Me S. W. 1/4 of Sec/Ion /B, shown o! N 00. 3l' OB- W on PARCEL a 19.99 Al I/J PML Is to r, Ne may` \\�mose."s 1 \�` •`AFC"°'39 JQ0OHL tiifgp 4 \!o• i ��'�dg� \ NOTEEsnpl .2 JJa6 Fr..� C! R•p/sirallon Exp/rel 6130 192 Easements foal may ellecl Porcap. Leceflon not de flned /n deeds 01 ` SS'!•alllNry• 59.1° \ • o 3 I -\ �� Fr•. .n \ `\ '--� 84 DEEDS 381 O.J. Marlin to 401 e, L , \ 96 DEEDS 292 volley C -11's Power Company CO SURVEYOR'. -S STATEMENT p This mo nos be.. °ce.I..d /n e���p dOBY. rlm 9 Ilyn 8766 LOP Ac. I 'n o ` Ea I • . • - �.p J \Offoff /nf Cand S.,,.yor•, ear Inb. apr of R'91-1)116Re. V ° . �J•I\ SP.� ./ Pror•e NB!•%'36'Em .. L J 12°50,551.E �u 199 1 slap I)S.BIIRI / `� 1179.13(R -D B9 r- N 05. 45'56' 360.00 I PARCEL 2 tl ' ,g .y/'� s 6 801 l� _gg9A3 _, P e.O Ar.e•l Ho. t4a5 "'m 19'1!_ 919.13 �1F 1`C 15 ,5e s;'. E �.•O 9i '�- •. ry W .. /19 P.M. l n'B+.� i/\ c�'-�1.; 49.1 `! q'f `�` ^ *�Cl�\"!'rt 6uli county surveyB WillP7 Ac. u Pa�'ro. Y 6�'/sc s.vnr Registration Cion R.C. E. /9315 BAUNER4 LIGNTCAP / N s.m.a, Lw. c �0%.7.11ra' Repls lr011on E+p/nl 3/3//93 � ?,• � :�' Rec. "SYer. NO. 90-P4fl6 / i -� \�'i l �, lC1 NO TEL 32.16 AC, TOTAL ipe O Opfr v¢w oe. � RECORDER'S STATEMENT - O Ji � /red er 9a Ne. ar.v1�+ Off,: w 9�6 y� \- � I- - /'" 10-09/IeP `,0 TN Y 20a Filed of Pa d0 of her.g. f991. In BOotr� / 1 ao's•o h.. _4r ' 4 6? Ser pay f11� 0l In• regY.11 Of 5/O/f0 West 3Y/Yeylnp '\ -\ s.n°•. Lw. •\,i E - �1 R e. wOT[, Ser a) No. Pa m oI� ^ \,` `� 0 r.0/Ae. - p,b 0w, hewn u,•esr• f TIMC=9.bf A. M. EXl9TING \\^ \ 0')/!.( sa.as•G,Pe•a,r.v •�\5° asr... o ya asesnusve. is qi I/ d X0.23 Aa. n �m 1.. \ � ��\ �p 9000/ 9� S•• "/y/ od` gCOu I R.eordGR _ _soo.00 _�/f �PARCE �'l r--gi=13.- 0394i +• /y uB N B6' 22' 22' E(R) 839:0 y200. ^ N 66• PE• Pe-E(M G / \ N6+ 113 PMI � , 13.59 AC. y- �d / Q 4� O B !,//ar.ts� S 0 639.00 )00.00 , P r TOTAL ".f J 0 e` 04 Depury /I. -on la -4 d, '•\ y0 4.77 Ac./A?e�� * `_ �' i J+\ p6 ` •Pa, '`{O .!). + �' �,PR�� 1,•@\ ° RECORD OF SURVEY - J�F N09 -36'40"C 544.14 4,4� ) coq, y6 OF A BOUNDARY LINE' MODIFICATIONFOR " ..•'\• y\ PJ�1 as - yHARRY BAUNER et of • BAUNER 0 •a . s.+e.r. w. O.JI Ae. PARCEL 3 eR ''•°"^ P Cso Rec, Se/. IBD f10 +° PARCELS./, 2, 8 3, OF 1/3 P.M. 1-4, 8 -183$8so- � o•Y;� ,,,, p./L ,,, \9 � � *'mB MODIFIED PARCEL 3 OF 89 P.M. 35, MODIFIED �9�ti MODIFIED PARCEL 3 I SEC. 18 8 /9• T 22 N•, R. 3 E. M.D.B. 8 M., PARCEL B9 PM 35 -__ Nee 3o'34"ffR-l1 , �rvQ BUTTE COUNTY, CALIFORNIA I' sec. 500.70 fR-Il Se...84.38250 w _/ �� - IOf,07 AC. TOTAL - � 4 SIERRA WEST - SURVEYING ' 5437 BLACK OLIVE DR. (916) 877- 6253 PARADISE, CALIFORNIA 95969 O y Z - LEGEND m m b ••. Found Iron Pipe R.C.E. 16803 per 6I a )r• Hen P/pe L.9. 3396I ^T MAP a as, 1113 PM I per -N 0 �j Di TOOSCAtL •,Found 3 /4' Iron Pipe (eo-) R `; �p a 0'11 I8 RC PARCEL 3 per 113 PM I ■•Found 314" Iron Pip. R.C.E. 7294 o 4 4 \ c✓NOrc: _ �. _ �l ll3 PM 1� c,Hrma rr w.,.rlo. w per 113 PMI •:telco/afed Po/n/Onl y m s c•11p1pO'P" O•sefl/P.-R,DOr 1.5. 3346 SURVEYOR'S STATEMENT 0 N. J,,' B / BAUNER R.L OR. I h '4' ( Rec. Ser. No. BB -51194 \ /R1.Re cord Dala per 113 P.M. I-4 This map carr.elly reprea.nls a survey made by me or under my d/recllon In the O ` N per 58 P7-U.Record Dafa 84-38298 rd Dole conformon • with r.qulr,menls of the Land Surveyor'! Acl In• Harry Baum.r In November, SCALE /". 200' 2 203.25 AC. TOTAL �2 hn.+ er c84-38 ee-aeoroJ of r.puesl Of 1990 may` \\�mose."s 1 \�` •`AFC"°'39 JQ0OHL tiifgp 4 \!o• i ��'�dg� \ NOTEEsnpl .2 JJa6 Fr..� C! R•p/sirallon Exp/rel 6130 192 Easements foal may ellecl Porcap. Leceflon not de flned /n deeds 01 ` SS'!•alllNry• 59.1° \ • o 3 I -\ �� Fr•. .n \ `\ '--� 84 DEEDS 381 O.J. Marlin to 401 e, L , \ 96 DEEDS 292 volley C -11's Power Company CO SURVEYOR'. -S STATEMENT p This mo nos be.. °ce.I..d /n e���p dOBY. rlm 9 Ilyn 8766 LOP Ac. I 'n o ` Ea I • . • - �.p J \Offoff /nf Cand S.,,.yor•, ear Inb. apr of R'91-1)116Re. V ° . �J•I\ SP.� ./ Pror•e NB!•%'36'Em .. L J 12°50,551.E �u 199 1 slap I)S.BIIRI / `� 1179.13(R -D B9 r- N 05. 45'56' 360.00 I PARCEL 2 tl ' ,g .y/'� s 6 801 l� _gg9A3 _, P e.O Ar.e•l Ho. t4a5 "'m 19'1!_ 919.13 �1F 1`C 15 ,5e s;'. E �.•O 9i '�- •. ry W .. /19 P.M. l n'B+.� i/\ c�'-�1.; 49.1 `! q'f `�` ^ *�Cl�\"!'rt 6uli county surveyB WillP7 Ac. u Pa�'ro. Y 6�'/sc s.vnr Registration Cion R.C. E. /9315 BAUNER4 LIGNTCAP / N s.m.a, Lw. c �0%.7.11ra' Repls lr011on E+p/nl 3/3//93 � ?,• � :�' Rec. "SYer. NO. 90-P4fl6 / i -� \�'i l �, lC1 NO TEL 32.16 AC, TOTAL ipe O Opfr v¢w oe. � RECORDER'S STATEMENT - O Ji � /red er 9a Ne. ar.v1�+ Off,: w 9�6 y� \- � I- - /'" 10-09/IeP `,0 TN Y 20a Filed of Pa d0 of her.g. f991. In BOotr� / 1 ao's•o h.. _4r ' 4 6? Ser pay f11� 0l In• regY.11 Of 5/O/f0 West 3Y/Yeylnp '\ -\ s.n°•. Lw. •\,i E - �1 R e. wOT[, Ser a) No. Pa m oI� ^ \,` `� 0 r.0/Ae. - p,b 0w, hewn u,•esr• f TIMC=9.bf A. M. EXl9TING \\^ \ 0')/!.( sa.as•G,Pe•a,r.v •�\5° asr... o ya asesnusve. is qi I/ d X0.23 Aa. n �m 1.. \ � ��\ �p 9000/ 9� S•• "/y/ od` gCOu I R.eordGR _ _soo.00 _�/f �PARCE �'l r--gi=13.- 0394i +• /y uB N B6' 22' 22' E(R) 839:0 y200. ^ N 66• PE• Pe-E(M G / \ N6+ 113 PMI � , 13.59 AC. y- �d / Q 4� O B !,//ar.ts� S 0 639.00 )00.00 , P r TOTAL ".f J 0 e` 04 Depury /I. -on la -4 d, '•\ y0 4.77 Ac./A?e�� * `_ �' i J+\ p6 ` •Pa, '`{O .!). + �' �,PR�� 1,•@\ ° RECORD OF SURVEY - J�F N09 -36'40"C 544.14 4,4� ) coq, y6 OF A BOUNDARY LINE' MODIFICATIONFOR " ..•'\• y\ PJ�1 as - yHARRY BAUNER et of • BAUNER 0 •a . s.+e.r. w. O.JI Ae. PARCEL 3 eR ''•°"^ P Cso Rec, Se/. IBD f10 +° PARCELS./, 2, 8 3, OF 1/3 P.M. 1-4, 8 -183$8so- � o•Y;� ,,,, p./L ,,, \9 � � *'mB MODIFIED PARCEL 3 OF 89 P.M. 35, MODIFIED �9�ti MODIFIED PARCEL 3 I SEC. 18 8 /9• T 22 N•, R. 3 E. M.D.B. 8 M., PARCEL B9 PM 35 -__ Nee 3o'34"ffR-l1 , �rvQ BUTTE COUNTY, CALIFORNIA I' sec. 500.70 fR-Il Se...84.38250 w _/ �� - IOf,07 AC. TOTAL - � 4 SIERRA WEST - SURVEYING ' 5437 BLACK OLIVE DR. (916) 877- 6253 PARADISE, CALIFORNIA 95969 O y 07/15/2010 12:23 FAX, 5308928516 1 2 3 4 5 6 7. 8 9 10 11 12 13 14 15 16 17. 18 19 20 21 22 23 24 25 BUTTE CNTY SUP CRT CHICO t r -;t j BUTTE COUNTY SUPERIOR COURT Ca 002/016 F Su edor court of callfoNz F County a. Butte L JUL 14 2010 L E Y r,.Clerk . p 8 Dep 1k3S SIGNALIZED INTERSECTION WEST,LLC,) Case No.: 145636 Petitioner, ) RULING ON THE ). PETITION FOR and ) WRIT OF blANDATE COUNTY OF BUTTE, ..STATE .OF ) CALIFORNIA; BUTTE COUNTY BOARD OF) SUPERVISORS; and*.DOES 1"throu4h ) 10, inclusive, ) Respondent. ) 'Petitioner, Signalized Intersection West LLC ("SI West"), seeks a :peremptory writ of administrative mandamus directing Respondents, County of Butte and the Butte County -Board of Supervisors ("Respondents"), to.set. aside their decision of November 4., 200.6(Butte County Board of Supervisor's Resolution 08-151), denying SI West's application for a grading permit, --declaring a public nuisance at SI West's property, and ordering SI West to restore the property to its prior condition. The action of the Board of Supervisors was a result of SI West's appeal of the Butte County Planning Commission's denial of a grading permit (Permit 06-01). FACTUAL AND PROCEEDURAL BACKGROUND SI West is the.owner of two parcels of undeveloped real property located in rural Butte Creek Canyon, on the northerly side of Centerville Road;•approximately•two miles northeast of Honey -Run -Road RULING ON PETITION FOR WRIT OF MANDATE - 1 07/15/2010.12:24 FAX 5308928516 • . 1: 2. .3" :4 •8 9 10 11 12 13 14 15 16. 17 18. 19 20 21" 22 `23 24 25 BUTTE CNTY SUP CRT CHICO __11 . . ... 0003/016 � and 1;600 -feet northeast of Cable:Bridge Drive. (APN 017-090-138 and 017-090-139) (hereinafter, the "Property"). (Administrative Record (hereinafter "AR".)., 231-236 at 231.) The parcels are roughly 40 acres each:in size, and thus.the,Property in total is roughly 80.acres. In or about July 2002,.before SI West acquired the Property, the County issued tentative:parcel map TPM 01-06 for the Property. (AR 366.) The Butte County"Department of Public Works ("Public Works"),.subsequently approved a revised map with slightly different parcel..line delineations ..(AR 366) and thereafter, on or about December 11, 2002, the tentative parcel map which created the subject two parcels was recorded.- (AR.165.) After this map had been approved and recorded, SSI West purchased the Property. (AR 366.) SI -West's intent in purchasing the Property was to build two private homes, one on each parcel, as allowed for by the recorded tentative parcel map. To provide access to the parcels and the homes, the original:.property owner proposed construction of two separate: driveways, one for each home. (AR 467.). According to.:SI West, -the original owner's proposal was. -problematic for a number of reasons. For instance, the proposed driveway for the southern parcel would have cut -through the center of-& wetland area, and the proposed driveway for the northern parcel would have been too close to a small stream which feeds into Butte -Creek -...,(AR 1316, 2367) After purchasing the Property and analyzing'the original proposal for construction of two s.eparate.driveways, SI.West, after consulting with its engineers and environmental. .experts, determined that the better course would be to create one driveway off of'the.main public roadway, Centerville Road. (AR 63,• 2184-218-5, 2367..) They further believed that creating a RULING ON PETITION FOR WRIT OF MANDATE - 2 07/15/.2010 12:24'FAX 5308928516 BUTTE CNTY SUP CRT CHICO 1?1004/016 single driveway, instead of two, would minimize the impacts on the surrounding vegetation. (AR 21'84-2185.) �.._ On.or'about May 26, 2005, SI West submitted an application for an encroachment'permit to Public Works. (AR 22) The application, which consisted of detailed plans and specifications for the newly proposed driveway, included; among other things, a profile of the driveway. The plan was for construction of the single driveway, rather than the two set forth in the former owner's original proposal. (AR 1310- 1311.) SI West understood that the encroachment permit was required before construction of the driveway to the homes could begin, and that such permit was necessary to allow the driveway to intersect with Centerville Road. The proposed driveway was approximately 300 feet in length, extending from Centerville Road to an existing gravel road. (AR 611.) In June of 2005, SI West's engineer, Wesley Gilbert, met at the County offices with various Butte'County representatives, including_ Stuart Edell',�the manager of Butte County Land Development Department, and Doug Arnold, the County's encroachment permit coordinator. (AR 1324-1325:). A few weeks'later, Mr. Gilbert met at the.Property with Mr. Arnol:.and Jack Warson, the Butte County road coordinator, to discuss the encroachment permit as'well as some minor changes in the approach of the driveway. These contacts show the county was aware of the:change in location to a single driveway before they issued the encroachment permit'. Later that same month, Public Works issued an encroachment permit to SI West for construction withina public right- of-way (Centerville Road). (AR.466.) Thereafter, on or about August 1, 2005, in reliance on the encroachment permit and the related RULING ON PETITION FOR WRIT OF MANDATE - 3 07/15/2016 12:24 FAX 5308928516 2 c 3' 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19' 20 21 22 23 24 25 BUTTE CNTY SUP CRT CHICO U' lj 005/016 discussions with County personnel-,- SI West began work on the driveway. (AR 2172, 2179.-) There is a dispute as to whether the county implied a gradingpermit might not be -required but clearly SI West failed to -get a"grading permit prior to beginning work on the driveway. After SI West began work on the driveway, various neighboring property owners contacted the County to voice concern about the construction SI West was conducting. (AR 2179) Subsequently, -however, during an inspection, SI West's engineer was informed by Tom Odekirk from Public Works that no grading permit was required, and that the'cut for the,driveway had been taken to the'proper depth. (AR 1311.) SI West claims it.was in reliance on the County's further presentation that -it could continue without a grading permit that jSI West -continued to go forward with its work on the driveway. (AR 1312.) Thereafter, the County received more complaints from neighboring landowners, and on August 26, 2005, Public Works issued a stop work order to SI West based onits.failure to obtain a grading permit:-. (AR 466, 2187.) SI West complied with the order, and immediately ceased all work on the drive. r Thereafter, SI West applied for the grading permit through the Butte County Planning Department. SI west also learned that land disturbances of one acre or more must be covered by a Stormwater Pollution Prevention Plan (SWPPP) under the National Pollutant. Discharge Elimination System. SI West's grading disturbed more than one acre of the SI West Property. (AR 002458, 002534.) SI West first prepared a SWPPP on September 13, 2005 (AR 002464), which was received by the County on October 17, 2005 (AR 000023.) RULING ON PETITION FOR WRIT OF MANDATE - 4 I 07/15/2010 1.2:24 FAX 5308928516 1 2 3 4 5 6 7 .8 9 10 11 12 13 14 15 Y16 17 1.8 19 20 21 22 23 24 25 BUTTE CNTY SUP CRT CHICO u' [a 006/016 The SWPPP provided detailed information about, among other things, the SI West Property and its characteristics, equipment that Petitioner• intended to use, construction procedures and materials that would be used on the SI West Property, and the proposed erosion and sediment control plans that Petitioner intended to rely on to reduce grading related erosion on the SI West Property. (AR 000300-000305.) California administers the SWPPP program and the State Water Resource: Control Board i$s"ues SWPPPs pursuant to the SWRCB''s Coristructiori Activities Storm Water General Permit Order No. 98-08-DWQ. (AR 000134-000161.) Between November 2005 and April 2006, Petitioner's contractor, Gilbert Engineering, conducted several inspections of the grading site to monitor the,SWPPP and prepared inspection reports for the Regional Water Quality Control Board (RWQCB). (AR 000549-000574.) These inspection reports apprised the RWQCB of .Petitioner's ongoing erosion monitoring, implementation of erosion control measures and re- evaluation of ongoing effectiveness of those erosion control measures. On December 20, 2006, County staff prepared a CEQA initial study for Petitioner's Application 06-01. (AR.000512, 000539.) This initial study determined that Petitioner's grading project under Application 06-01 could have potentially significant impacts. (AR 000467, 002537.) However, the initial study also determined that these significant impacts could be eliminated with the revisions to the project that were agreed to by the Petition erp and therefore that a CEQAmitigated.negative declaration would be sufficient. (AR 002536J) . T15 RULING ON PETITION FOR WRIT OF MANDATE - 5 07/15/2010 12:24 FAX 5308928516 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 BUTTE CNTY SUP CRT CHICO W After County staff filed its notice of intent to adopt a mitigated negative declaration for Application 06-01, several landowners responded to the County with letters and e-mails, f�007/016 .. complaining about Petitioner's past grading activities and proposed grading project, and encouraging the County to deny Application 06-01. (AR 000577-000584, 000587-000589, 000598-000605.) The Planning'Comniission denied the application and SI West appealed that decision to the Butte County Board of Supervisors. It 'is the decision (Resolution 08-151) of the Butte County Board of Supervisors that is the subject of this petition. STANDARD FOR REVIEW Under the applicable standards of judicial review in Code of Civil Procedure section 1094.5, this Court is limited to determining whether,or not there was a prejudicial abuse of discretion when the Board of Supervisors adopted Resolution 08-151. The Court may find an abuse of discretion only: (1) if the Board of Supervisors did not proceed in the manner required by law when it adopted this resolution, (2) if the remediation order or denial of Petitioner's appeal in this resolution is not supported by findings in the resolution, or (3) if these findings are not supported by substantial evidence in the administrative record. After determining whether the findings in Resolution 08-151 support the resolution's decisions and order, this Court must, as discussed above, determine whether the resolution's findings are supported by substantial evidence in the light of the whole record. (Goat Hill Tavern v. City of Costa Mesa, supra, 6 Cal.App.4th, at pp. 1525-1526.) This Court must begin this inquiry RULING ON PETITION FOR WRIT OF MANDATE - 6 07/15/2010 12:24.FA% 5508928516 BUTTE CNTY SUP CRT CHICO 0 008/016 1. 2 3 4 5 .6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 with the presumption that the record contains evidence to sustain the local agency's findings. (Stardust Mobile Estates v. City of San Buenaventura (2007) 147 Cal.App.4th 1170, 1180.) APPEAL FROM THE DENIAL OF THE GRADING PERMIT The court will find that the Board of Supervisors did proceed in the manner required by law when.it.adopted this resolution. The court can find no procedural errors in the process. In addition, it is the court's ruling that the findings themselves would support the resolution. The more problematic issue is whether the findings themselves are supported by substantial evidence in light of the 'entire record. Petitioner argues that the Board of Supervisor's order denying. Petitioner's appeal of the Planning Commission's denial of Petitioner's grading permit application is not supported by substantial.evidence. (Petitioner's Brief 9.17416-17; 15:17:18 - 23:2) Respondent points.out in their brief that the issue of past damage is not one of the findings the Board relied on in denying the appeal. The past damage factual findings were said to support the nuisance and remediation findings only: . .public nuisance and the Board's order to Petitioner to abate that nuisance. As -discussed above, that Board's decision to deny Petitioner's appeal is based on the Board's findings concerning incompatibility of the proposed driveway location with adjoining biological resources and property uses, Petitioner's lack of cooperation with the County in processing Petitioner's grading permit application and Petitioner's options to develop access. Petitioner improperly confuses these separate Board actions , and findings by including challenges to the Board's findings regarding Petitioner's past grading activities in. Petitioner's arguments regarding the Board's decision on Petitioner's appeal." (Respondent's Brief p. 37:2-13) RULING ON PETITION FOR WRIT OF MANDATE - 7 07/15/2010,12:25 FAX 5308928516 BUTTE CNi`Y SUP CRT CHICO Q 009/016 1 1 2 3 4 5 •6 7 8 9 10 11. 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Respondent directs the court to the only three -findings that the JBoard of Supervisors relied upon in denying the appeal for a grading 1permit (Respondent's Brief, page 32:10-20): "The Board of Supervisors made the following findings to support its denial of Petitioner's appeal of the Planning Commission's denial of Petitioner's grading permit application: (t]he location of -the proposed driveway is incompatible with adjoining biological resources and property uses, poses traffic safety impacts, and completion of it would require additional grading with additional impacts. (AR 002470, Exh. H, p. 13, Finding No. 8.) (t]he Applicant was given several opportunities to cooperate with •Butte County in processing the grading permit application and evaluating the impacts of the proposed grading, but the Applicant chose not to cooperate. (AR 002472, Exh. H, p. 15, Finding No. 9.) (a]although this [Resolution 08-151] denies Applicant's appea and its Grading Permit application, the Applicant still ha several options• that it•may pursue to develop access to, th Property. (AR 002473, Exh. H, p. 16, Finding No. 11.)" Respondent next sets forth the evidence the board relied upon to "bridge the analytic gap between the raw evidence and" the Board's decision. (Respondent's Brief p 33:1-26) For Finding No. 8: 1. Finding that the driveway location is incom atible with adjoining biological resources and property uses "[t]he location, of the proposed driveway 'is incompatible wit adjoining biological resources and property uses, poses traffi safety impacts, and completion of it would require additiona grading with additional impacts." (AR 002470, Finding No. 8) RULING ON PETITION FOR WRIT OF MANDATE - 8 07/15/2010 12:25 FAX 5308928516 BUTTE CNTY SUP CRT CHICO 0010/016 1 2 3 4 5 6 7 6 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 The respondent sets forth the following evidence that is cited Resolution'08-151, which demonstrates that Petitioner's proposed grading would: 1. cause additional environmental harm (AR 002470) 2. result in the grading of an additional 700 feet of road, a fire'lane turnout; and the transfer of •approximately 3,4'60 cubic -yards of soil for the building site on the SIW Property (AR 002470, AR 002488, 002535);. 3. require additional grading to reduce the slope ratio from 1.25 -to -1.00 to a new slope ratio of 2.00 -to -1.00 (AR 002470, AR 002480-002481); 4. cause additional erosion (AR 002470) (discussing Board of Supervisors' findings regarding effectiveness of erosion control measures); 5. require additional grading to widen the driveway from 11 feet to 16 feet, which would aggravate the erosion problems (AR 002470) 6 result in the destruction of a mature oak tree resulting from widening the driveway and reducing the driveway's grade (AR 002470,AR 002480-002481); 7. result in grading within the no development zones, which are shown on the parcel map (Exh. C) for the SIW Property (AR 002471, AR 002713); and 8. result in the driveway remaining at a point that is not either of the two driveway locations on the approved parcel map for the SIW Property (AR 2471, (and.prior references to driveway locations specified on the approved parcel map and line -of -sight distances on Centerville Road), The factual findings 2,3,5 and 7, set forth mere statements that more grading will have to done. There is nothing inherently positive or negative about more grading that has to be done. The fact that additional grading has to be done cannot be said to factually support the denial of a grading permit. That is exactly what the permit is for; if there were to be no grading, no permit would be required. RULING ON PETITION FOR WRIT OF MANDATE - 9 07/15/2010'12:25'FAX 5308928516 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 BUTTE CNTY SUP CRT.CHICO m [Moil/016 Factual findings 1 and 4 refer to "additional environmental harm" land "and cause additional erosion." This was an emotionally charged case as can be seen by the substantial input from the various neighbors who participated-in'the public hearing process. Further complicating this case is the fact that the County of Butte issued a Stop Notice on the project.when.the grading work was half done. The Court understands that the order to stop work was required due to the fact that the Petitioner had failed to get a grading permit. However, such stoppage may well have contributed to and/or caused many of the problems later used to factually support the denial for the permit. For instance, the Board used the fact that there was soil erosion that had occurred on S I West property to find that there was a high potential for further soil erosion as a reason to deny the grading permit. The erosion -issue was addressed in the Stormwater Pollution Prevention Plan ("SWPPP") which was issued by the State Water Resources Control Board after the grading began. Many of these erosion control measures were to be temporary in nature only. The RWQCB plan required annual analysis and reporting. In fact, the Initial Study and Proposed Mitigated Negative Declaration prepared pursuant to the California Environmental Quality Act ("CEQA") and cited to in the record and brief so may times (AR1055-1083) provides for the protections the neighbors requested and deserve: "All grading shall conform to a Storm Water Pollution Prevention Plan (SWPPP) prepared to conform to the National Pollutant Discharge Elimination System System (NPDES) General Permit as approved by the State Water Resources Control Board. The SWPPP application identifies the potential sources of sediment and other pollutants that may affect storm water quality entering lakes and streams. The SWPPP RULING ON PETITION FOR WRIT OF MANDATE - 10 07/15/2010 12:25 FAX 5308928516 BUTTE CM SUP CRT CHICO• 0012/016 1 2 3 9 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 29 25 sets forth Best Management Practices (BMPs) to maintain water quality for lakes and streams and to conform to the NPDES General Permit. Conformance 'with the SWPPP to address erosions impacts is the minimum required. Where conformance with the SWPPP is not adequate to prevent erosion impacts, additional measures must be taken. . . .The Department of Development Services and Public Works , Department shall spot check and Building shall ensure. compliance on-site. The Department of Development Services shall coordinate with the Regional Water Quality Control Board." (AR1069-1070) Petitioner's contractor, Gilbert Engineering conducted ongoing inspections of .the grading site to monitor the potential for soil (erosion and the report from Hanover Environmental Services shows that there had been no erosion since 2006 and that no sediment had entered the pond in question. These findings were made by professionals, trained and skilled at making such findings. These findings were countered by comrhdnts from neighbors who, understandably, did not want the project to proceed. They reported their observations but none was supported by scientific evidence. The next major issue involved the pond across"Centerville Road and the impact the grading might have on what everyone agrees is a treasure to be protected. The neighbors complained about the pond suddenly turning red after the grading had begun. Petitioner hired an environmental biologist to study the cause of the pond color change. Foothill Associates' conducted an analysis of the various biological issues, including issues relating to the red appearance of the pond. Their report details the conclusion that the mosquito fern is a common, herbaceous species that is especially noticeable in the spring and summer due to the release of deoxyanthocyanins that change the RULING ON PETITION FOR WRIT OF MANDATE - 11 07/15/2010 12:25 FAX 5308928516 BUTTE CNTX SUP CRT CHICO a IM013/016 ` 1 2 3 A 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 29 25 L• color of the fern to red. Mosquito fern is present worldwide and is also present in Butte county including other ponds in the neighborhood. There was also evidence presented that this mosquito fern was -present in the pond even before the grading project was begun. The expert's explanation was countered with neighbors who sought to convince the board the growth was the result of the ongoing grading project, again without any scientific basis. Factual finding 6 is that a mature oak tree may have to be removed and factual finding 8 is that the driveway will be in a location other than as set forth in the recorded parcel map. Causing one mature oak tree to be removed out of 80 acres can hardly be a substantial factor to justify•such a finding and the location of the road in contrast to what is indicated on a parcel map cannot be an issue in a grading permit as the grading permit would likely be required regardless of the location of the driveway. The County was always aware that the road as proposed by the Petitioner was in a different location than was indicated on the parcel map. 2. Finding that the Petitioner did not cooperate with the County in processing Petitioner's grading permit application (Finding no. 9) Respondent set forth the factual finding of the Board of Superviz ;o support its denial oaf -Petitioner's appeal, the Board of Supervisors ound : RULING ON PETITION FOR WRIT OF MANDATE - 12 ors ls0 07/15/2010 12:25 FAX 5308928516 I 1 2 3 9 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 BUTTE cNTY su cRT cHIco 16 014/016 [t)he Applicant was given several opportunities to cooperate with Butte County in processing the grading permit application and evaluating the impacts of the proposed grading, but the Applicant chose not to cooperate. (AR 002472, Finding No. 9,) To support this finding, Resolution 08-151 cites evidence in the record establishing that Petitioner refused to pay the County's costs of retaining the biological and archeological consultants that were retained by the County.. (AR..002472, AR 002704-002705) The County required Petitioner to -reimburse -it for its own consultant, which woul analyze: (1) potential.impacts to the Duck Pond; (2) viability of ,landscaping on road cut slopes; and (3) the new home site on the SIW Property. Respondent argues that Petitioner's consultant prepared a report that did not address all of these issues on which the County requested additional biological information. (AR 002472, AR 002705) Instead, SI West retained their own local consultant, one with solid credentials to conduct the biological study on the erosion and the impacts to the duck pond. The county has failed to show that the study conducted by SI West's expert was flawed or defective. In addition to explaining the growth of the mosquito fern causing the change in color of the pond, the consultant found: the slopes have now begun to re -vegetate with naturalized grasses) and associated herbaceous species similar to the surrounding landscape. Overall, the driveway cut appears to be re- establishing consistent areas that have experienced temporary soi� disturbance. (AR 002472, citing AR 001883.) RULING ON PETITION FOR WRIT OF MANDATE - 13 I� 07/15/201I10 12:25 FAX 5308928516 5 6 7 8 9 10 11 12 13 14 15 16 17 24 25 BUTTE CNTY SUP CRT CHICO 0015/016 This evidence was once again countered with the neighbors' opinions, none of it supported by scientific evidence. Lack of "cooperation" is a misguided finding when the study was done by a consultant other than one of the county's choosing. Additionally, the issue of the new home site is not in any way related to a grading permit for the driveway. 3. Findings regarding Petitioner's options to develop access Finally, as argued by Respondents, the Board of Supervisors foi although this [Resolution 08-151] denies Applicant's appeal and its Grading Permit application, the Applicant still has several options that i.t may pursue .to develop access.to the Property.JAR 002973, Finding No. 11) Whether Petitioner has other options that it may pursue is totally irrelevant to whether on not it should be granted a grading permit. Neither the erosion that was occurring mid project nor the possible fern growth in the pond nor the removal of a mature oak tree can be substantial factual findings warranting a denial of the permit in light of the significant record showing erosion control measures, negative mitigatidn 1nea9ures,'mdriltoring, biological studies, etc. The court concludes that these findings, while supporting the decision, are not supported by substantial evidence based on the entire record. This is especially true when considered in light of the Proposed Mitigated Negative Declaration that was before the Board of Supervisors and would have alleviated most concerns. It appears to this court that the Board of Supervisors felt strongly that because RULING ON PETITION FOR WRIT OF MANDATE - 14 07/15/2010 12:26 FAX 5308928516 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 �7 18 19 20 21 22 23 24 25 BUTTE CNTY SUP CRT CHICO [a 016/016 Petitioner did not obtain a grading permit as required by law before the grading -began, they could not and would not condone SI West's actions and to issue.the permit might reward bad behavior. The court, agrees that Petitioner was wrong in failing to obtain.the necessary permits as ignorance of the law is not an excuse. However, to deny , -a grading permit on a driveway for a project that had the county's approval throughout the arduous process from parcel map approval through to commencement the project is an extreme measure considering the total record. The court concludes that the findings are not supported by substantial evidence based on the entire. record. APPEAL FROM THE ORDER TO REMEDIATE Based on the Court's ruling above, the appeal from the orders declaring a public nuisance at SE West's property and the order.to restore the property to its prior condition is moot. CONCLUSION The peremptory writ of administrative mandamus shall issue. The County of Butte and the Butte County Board of Supervisors is ordered to set aside their decision of November 4, 2008, Resolution 08-151. July 14, 2010 Barbara L. Roberts Butte County Superior Court Judge RULING ON PETITION FOR WRIT OF MANDATE - 15 1 07/15/2010 12:23 FA% 5308928516 BUT CW SUP CRT CHICO Q001/016 SUPERIOR COURT OF CALIFORNIA COUNTY OF BUTTE 655 Oleander Avenue, Chico, CA 95926 Tel: Traffic: 892-9407 Civil: 892-0849 Probate: 8928816 FAX COVER SHEET TO: Lai ' N FROM: n 4 1� 1. v. � �• DATE: COMMENTS: Number of pages including coversheet: Original to Follow: No yes I r I I . TT 1 A 1009 ....--- f i J i 1. ... .. PROJECT SITE ,. - . _ _:._ J i v N i L 1. S P o A L A N G J ti f i i PARCEL A ,, �. ,. 138 i 017 09 0 a '�. P N A J. q r i K 'z, i 4 e l i I I r i r TOWN OF f r r G 1 A S PAR DI E /E=,r O l q v rr` I l AO ✓. l i i i ION MAP LO CAT A f r_ A i 1 A / ✓,. _. CONSTRUCTION ON N OTE S (SEE SHEET FOR E OF NOTES):. 01 1 CONTRACTOR SHALL MAINTAIN STRAW WATTLES, SILT FENCING AND/OR R \ _ STRAW 'MUL CH PER BEST MANAGEMENTPRACTICES BMPS TO MINIMIZE - EROSION STOP SEDIMENT FROM LEAVING THE PROPERTY, AND FROM � ... � ENTERING THE STORM DRAIN SYSTEM ROADSIDE DITCH). � �... PARCEL r, 5 ff f 2 STAGING AREA PER STORM WATER POLLUTION PREVENTION PLAN �S WPPP . ,. . 4 f V .��. ENSURE E STOCKPILES AND ALL EXCESS MATERIALS IN THIS AREA COVER MANAGEMENTMENT SUPPLIES ARE NEARBY FOR EMERGENCYGENCY USE IN t, .. A A �..... . � COVERING EQUIPMENT MATERIALS RAINFALL. ARE Y , .. RELOCATE DURINGPROGRESSION OF PROJECT. IN, �. A 3 DURING SITE CONSTRUCTION, THE SITE SHALL BE MAINTAINED TO DIRECT ..,. . . A RUN—OFF TOWARDS THE PROJECT INTERIOR. RUNOFF DIRECTED WAR t ,,.. . ROADWAY SHALL NOT CAUSE .EROSION. IN EVENT THAT MEASURES .,. .,,. A � .�.,\., .. x 11 SEE DRIVEWAY DETAIL SHEET 2 ARE NOT YET READY OR INTHE EVENT OFUNEXPECTED RAINFALL, SITE SHALL BE PREPARED WITH SEDIMENT CONTROL TO;MINIMIZE SEDIMENTATION ONTO C NTERVILL E ROAD AND WATERWAYS.ERWAYS . SEESHEE FOR TYPICAL ., , �. i S A A AREAS). i A mss_` 4 ANY AREA THAT IS INACTIVE DU RING THE RAIN IN SE ASO N OR UNIMPROVED .. i w Y.- AREAS USED FOR ANY SUCH TRAVEL THATAT COULD LEAD TO SEDIMENTS . i _ .. ,., ✓ . �. BEING CARRIED ONTO CENTE RVILLE ROAD WATE RWAYS SHALL BE r PLASTIC DRO S EEDED COVERED WITH GEO FABR IC STRAW MULCH H`OR ... A APPROVEDOR AS T DIRECTOR ROR ENGINEER. BY SITE y ,. ,. .. 1. _.. .. i. v r � PLACECONCRETE WASH IN LOCATION EASILY ACCESSED BY ALL \ _ i Y CONTRACTORS AND WORKERS PREFERABLY ADJACENT PAVEMENT A a.._��. . a i . 6 �...,. AWAY OMSTORM DRAINAGE INLETS,_SEE DETAIL 1 0N SHEET 2. P _ .. .. , . n .. () CAN BE ANOTHER METHOD. r .. i � .. r `,L Tai^' w 4. d 6 x STORM DRAIN INLETS TO BE PROTECTED PER R WITH w t r GRAVEL BAGS, ROCK SOCKSAND/OR IN ET FILTERS. USE CHECKDAMS \ � 9 � `- ALONG CURB SASNECESSARY.=SEE DETAIL 2ONSHEET2 V �a .. n � .. .. .. _ . l6. PARCEL � ♦ ♦ SWPPP (GRAVEL 0VERSTABIL ZED CONSTRUCTION ENTRANCE A017090139 /_- rte � r , � . rr oF � ✓ � A P 1. .. r '.. FILTER FABR C TO MINIMIZE SOIL AND OTHER SEDIMENT FROM LEAVING THE � Q A 5 ✓ a � . 1 6 . r .. i ✓ .. 9 ..` ' SITE). SHOWN 0N SHEET 2 A ILLUSTRATION. THIS BMP BE r .✓ i PLACED N`EACH AREA THAT TRAFFIC ENTERS/EXITS SITE. SEE "EROSIONCONTROL PLA SITE DETAILS FOR DETAIL A % o , Z. A i _ A' A r) SPECIFICATION OF SEDIMENT ENT CONTROL MANAGEMENT. i 4 l it i a i _ a i Of .. _ .. a. ✓ i x f a x ✓ a a � 1 b l J / t r ,�crSi ,. .1. r... . ..aa. 1LEGEN A _ % % MARSH .r. f no f_ ....y �-- l �a �I r 'ASO -_ EXISTING GROUND f 9/ - i 4 1 f EXISTING N PROPERTY .LINE APPROXIMATE LIMIT OF >SOIL r TESTING IL TE PIT TO BE w . EXISTING MARSH AREA EXCAVATED FOR 'PURPOSE 05E F PROVE ACCEPTABLE E 0NSITE .. ✓. COBBLE LINED DITCHES WITH COBBLE CHECK DAMS EVERY 150 SEWAGE DISPOSAL) OSAL . , O ------------ MIN "SEE TYPICAL ROADWAY Y SECTI ON SHEET 2 . :. ✓ : �, ti STAGING ARE MAINTAIN PROPER STOCKPILE MANAGEMENT .. ......... ;.. ....... Y STABILIZED CONSTRUCTION ENTRANCE,RA CE SEE NOTE SHEET IND 1 EROSION CONTROL R PLAN.. SITE OVERVIEW CONCRETE WAS H AREA SEE DETAIL 1 SHEET 2 PLAN: SITE DETAILS .f EROSION CONTROL ROL L SILTFENCE OR FIBER ROLLS DRAWING NO: i eR 0 F ESSDATE. APRIL 24 2006 0 H O w E. G a 1 OF 2GILBERT ENGTNEERING �5 ,DESIGNED. JMF timEROSIONCONTR0LPLANSITE0VERVIEW PROJECT NO: 7 0 DECLARATION lsas PRO No. 3 THE VILLAS AT BUTTE CREEK 0 DRIVE SUITE 101 N .:DRAWN. CLT CH E XP. 12 31 06 ICO CALIF CALIFORNIAORNIA 95973 sc 1 289 _ 9 P TE. 530 899-9503 .9503 1 l CALF APPROVED: -T T _I I i I i I I� L I I I I I I , L I I � III I I ES PLACE STRAW WATTLES EXISTING SPOILS SLOUGH TO r ROADWAY AS .CHECK ACROSS R BE REMOVED. AREA TO BE / • / r DMSEE -- A EVERY 500 REGRADED E T0 NATURAL - / STATE AND HYDRO SEEDED � T E WITH PLACEMENT OF STRAW U VERT HYDRO SEED : E XISTING C L / t WHERE NECESSARY.`: , ., x STRAW MULCH, OR PLACE .. ST GEO TEXTILE FABRIC TO PROTECT ,TYP \: 71, BANKS x rr 4C • ". ' ::-. : X16' N .t x n / > r r \ r l `SECTION TYPICAL DRIVEWAY--- ...•:. STA. 5+00 TO END _ I v r r N.T.S. i }w f]( z v �pppy .pppp\ �¢ aapp r f .». \ ` INSTALL SILT FENCING OR f t r ,- STRAW WATTLES ALONG r TOP 0 NK TYP h i . l r s r t i 5 j f TOP OF BANK r • .,e 1 5 �t 1 TO SLOW RUNOFF INSTALL STRAW WATTLES DR GRADE JUTE- OR GEOT XTILE MAT STA RT STRA W TTLE OR 1 / r CHECK DAMS EVERY 150' UP (OVERLAP SECTIONS AND PIN � EARTHENHEN C � RDAM, TYP. IN PLACE TYP. _ [i ' PLACE BALLAST ROCK 40, ON BOTH SIDES OF ROADWAYENTRANCE GRADE ULVERT CROSSING LINEEDGE OF ROADWAY \ ♦ WITH STRAW WATTLES t ES 'OR SILT FENCING ` / E t / ' - r > l GRADE A SWALE 5 / .. FROM 'TOP OF -INSTALL . ., :.....:..; ROADWAY WAY EMB ANKMENT COBBLE LINED :.:......................... _.. :...::.:.....::. :..-.. ... . , i O `ROADSIDE DITCH WITH a r / CBE OB L CHECK DAMS F I, ,r EVERY 150 MIN. TYPICAL DRIVEWAY SECTION BOTH SIDES. TYPICAL B STA. 1 10.94 TO STA.. 5 00 2 1 F N.T.S. COBBLE LINED DITCHES ' t AND COBBLE CHECK DAMS - 0 Mf EVERY 15 .ALONG N EDGE QF GRAVEL r F'— 0 DRIVEW Y TYPICAL SEE Y " A i SECTION i s r, A r i r - � / PLACE STRAW BALES OR tr r t / EARTHEN DIKE ALONG r / 5 MISC. NOTES VER ENTIRE AREA AND CO � PERIMETER THE PER , 1. EXISTING STOCKPILES ES SHALL BEPERIMETER CONTAINMENT EACH RECTANGLE. : 0 —SE EDWITH 10 MIL OR BETTER COMBINED WHERE POSSIBLE. HYDRO PLASTIC MATERIAL OR COVER EACH PILE TRENCH AROUND TO ILT FENCING. PERIMETER AND LINE WITH S I r 2. ALL AREAS > RE S D STURBED WITH GRADING s a �SHALLBE HYDRO—SEEDED AND COVERED I t / ' / r WITH STRAW MULCH E / i , , r : / r t / r 1 / 0 - f r .t n / �5 / *SECURE AND MAINTAIN PLACEMENT OF COVER. a > S > ** OF CONCRETE WORK :- E USED IF ANY TYPE ' ! TOB :.� r` r ! ! ......SITE ! S PERFORMED ON I _r ♦ r ! �s y -r r r, 0 f r / x r DETAIL 1CONCRETE WASH AREA r r _ r r r ,r r N.T.S. / f t� { r r r r l . 5 3 \ j ! t ! r / r -r r ' r ! > q �- t t � SAKE `FIBER ROLLS v c 6 C R R ATE , r t ROCK AGGREGATE c .. r r < .. t ! BALLAST ::ROCK PLACED A r r t• i v , r t.. r A MINIMUM 1,00 FEET INTO S. t ` E ry r .. I , / {Lp- .:PROJECT ENTRANCE } .. .. ,. - , n ... ...� n.:. RO LLS AND GRAVEL EL AT COMPLETION TION x PROTECT INLET CONTRACTOR TO REMOVE FIBER RAW MULCH , \ ST .. 1 , t.. .. r� {r ,1 Y OF PROJECT OR A S REQUIREDUIRED /v STRUCTURE, SEE DETAIL 2WITHTA KIFIERS .. w., b DURING STREET PAVING. SEED / /\ { t.r� „ k >. y� .'t � r - SEEDED AREA, WHERE NO T IN PERIMETER. CONFLICT WITH PAVEMENT T0 REMAIN. iv00, HYDR0OUTSIDE 10, , y , . :. n b :.. , ,. .. t { t .� J .I .. .f ... {b DETAIL FOR FLAT GRATE INLETS 7 w / 1 / --- ---DURING CONS TRUCTION THE t E N SHALL BE A RAE FL T OWLI MINIMUM IMU OF 4 BELOW THE TOP OF THE LOWEST. ADJACENT FIBER ROLLS. i / DRIVEWAY ` DETAIL 2 STORM DRAIN INLET PROTECTION -_ 1 = 30 ......... N.T.S. DRAWING NO: • DATE. APRIL 24 2006 e.R 0 F ES S 0t FO, �E.G/ GILRERT ENGINEERING f 8 q ti 2 OF 2 , DESIGNED. JMF 3 Z VILLAS AT BUTTE CREEK � m W m . No. 31689 - EROSION CONTROL _PLAN. SITE DETAILS - PROJECT N0: V V SUITE 101 THE I DRIVE, '70 DECLARATION : CHIC WV . CLT EXP. 12/31/06 • 0 CALIFORNIA 959'73 DRAWN: 9 P CIVIL1289 0 899 9503 53 F ( l CAL < APPROVED. -- I I I