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RESOLUTION ADOPTING ON-SITE WASTEWATER MANUAL
WHEREAS, the science and technology of wastewater
treatment, dispersal, and management is rapidly changing and
advancing; and
WHEREAS, the broadest array of wastewater technology should
be available in Butte County to mitigate site conditions in some
areas of the County, such as shallow or poorly drained soil,
steep slopes, shallow watertable; and
WHEREAS, wastewater design tools are most effectively
utilized under parameters that assure consistent application of
the technology using best industry and best management
practices; and
WHEREAS, parameters for the application of wastewater
technology needs to change over time in response to advancements
in science and greater understanding of the technology based on
field experience; and
WHEREAS, Butte County Code Chapter 7.9, as revised,
recognizes that there should be an On-Site Wastewater Manual
which sets the parameters for the application and use of
wastewater technology; and
WHEREAS, Butte County Code Chapter 19, as revised, requires
the establishment of the Wastewater Advisory Committee to assist
in the development and future revision of the On--Site Wastewater
Manual.
NOW, THEREFORE, BE IT RESOLVED that, effective June 1,
207.0, the Board of Supervisors of the County of Butte hereby
adapts the On--Site Wastewater Manual, attached as Exhibit A, to
implement the standards and requirements of Butte County Code
Chapter 19 and to set parameters for the siting, design,
Resolution IO--042
installation, component quality, operation, monitoring, and
maintenance of on-site wastewater systems in the Butte County.
PASSED AND ADOPTED this 16t~ day of March, 2010, by the
following votes:
AYES: Supervisors Dolan, Kirk, Lambext, Yamaguchi, and Chair Connelly
NOES : None
NOT VOTING: None
ABSENT :None
BILL CONNELLY, Chair
Butte County Board of Supervisors
ATTEST:
SCOTT TANDY, Interim Chief Administrative Officer
and Clerk of the Board of Supervisors
By.
G:\RESOLUTTOS7S\Wastewater Manual Resolution.doc
2
EXH~BI~ A
BUTTE COUNTY
PUBLlC HERLTH
Butte County
On-Site Wastewater Manual
Part one: Process
Part Two: Materials
Part Three: Sysfiem Requiremenfis
Part Four: Operation, Monifioring, and Ma~nfienance
Adopted March ~6, zoo
e u r r~ c o u x r r pn-Site Wastewater Manual -Part 1-Process °0~rrf°
Adopted March 16, 2010 ° °
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Note: This version using °'
Part One: Process traci<ed edits shows change
directed by the Board. at,the,
~
meeting £(see pages 2-3).
,
Chapter 1. Site Evaluation ...................................................... ..................................•--•-•-2
A. Site Preparation and Application .................................. .........................................2
B. Soil Test Hole Excavation ............................................ ................................~-•
C. Site Inspection and Evaluation ..................................... .........................................4
D. Expiration ..................................................................... .........................................4
E. Groundwater Monitoring ............................................... .........................................6
F. Percolation Testing ...................................................... .......................................10
G. Slopes 15%-30°/a .......................................................... .......................................12
H. Suspected Slope Instabiiity .......................................... .......................................12
Chapter 2. Construction Permit .....................................................................................12
A. Application ..........................................................................................................12
B. System Design ....................................................................................................12
C. Design Stakeout ..................................................................................................14
D. Notification, Inspection, and Final Approval ........................................................14
E. System Repairs, Replacement, Modifications, and Expansions .........................15
Chapter 3. Operating Permit ..........................................................................................15
A. Issuance ..............................................................................................................15
B. Valid Operating Permits Required .......................................................................16
C. Required Information ...........................................................................................16
D. Cleveland Hills Alquest-Prio[o Earthquake Fault Zone ........................................16
E. Richter Magnitude of 5.0 and Above ...................................................................16
Chapter 4. Testing Septic Tanks to Assure Watertight Construction .............................16
A. Septic Tanks in Use at Time of Testing ...............................................................16
B. New Construction or Tank Replacement .............................................................17
Chapter 5. Implementation of Certification Requirements .............................................17
A. Installers ..............................................................................................................17
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Part one: Process
Chapter 1. Site Evaluation
Site evaluations are required for approval of all parcel and subdivision maps and
for construction of on-site wastewater systems. Site evaluations are not required
far on-site wastewater system modification or replacement, although elements
contained in this section, such as soil analysis, may be incorporated into the
process for permitting the construction of said modifications or replacements.
A. Site Preparation and Application
1. With the exception of Water Well Reports and complaint informa-
tion, LEA parcel files are accessible to the public and customers
are encouraged to review their property file before applying for a
Site Evaluation.
2. Site Evaluation applications will only be accepted when determined
by the LEA to be complete, including the following information:
a. All portions of the application form are completed and legible
b. Clear, written directions to the site accompanied by a vicinity
sketch
c. Dimensional site plan that includes location of soil test holes
in relationship to property boundaries, and landmarks as ne-
cessary
d. For other than single family residential systems, information
indicating the estimated amount of soil disturbance {in acres)
and grading {in cubic yards).
e. Signature of the applicant
f. Fees as specified in county code
3. Site Evaluation applications are not considered complete until the
test holes have been excavated and are ready for inspection and
the site is flagged at the road and at the test hole location. Flag-
ging tape is provided by the LEA at the time of application.
B. Soil Test Hole Excavation
1. Number and Location of Test Holes
Unless otherwise approved by the LEA, a minimum of 4 test holes
will be required for each parcel, with two holes excavated in the
primary and two holes excavated in the replacement drainfield
areas. At the discretion of the LEA, additional test holes may be
needed to adequately characterize site conditions or fewer test
holes may be allowed based on considerations such as space limi-
tations on smaller parcels or uniformity of area soil characteristics.
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: - For legally created parcels five acres or greater in size, the LEA
shall accept soil data recorded at the time ~f parcel creation in lieu
of excavating and evaluating new test holes at the time of site eval-
uation.
2. Dimensions of Test Holes
a. The holes are generally excavated by a backhoe, but hand
dug holes are acceptable when dug to proper dimensions
and with adequate spoils pile setback. Test holes only need
to be dug into the restrictive layer. When a restrictive layer
is not identified during test hole excavation, test holes must
be dug a minimum of 5 feet deep. The reason for this depth
is to verify that the site cans accommodate a 2 foot deep
drainfeld with an additional 3 foot of vertical separation.
b. Excavator requests for test holes shallower than 5 feet
(without encountering a restrictive layer) due to site specific
concerns such as soil sloughing characteristics and access
to the site by children or animals, will be considered on a
case-by-case basis. The LEA will work to identify ways to
meet the excavator's concerns other than digging shallow
test holes, such as arranging to meet the excavator on site
so the holes can be immediately covered.
c. All holes should be excavated to Cal-OSHA standards, but
at a minimum the test holes need to be dug a minimum of 5
feet deep or into the restrictive layer, whichever is shallower.
The holes must be 2 feet wide, and long enough for an en-
trance ramp. The ramp must be no steeper than 1 foot ver-
tical to 1.5 foot horizontal. If the hole is deeper than 4 feet, a
platform must be constructed at the 4 foot depth to allow the
inspector to complete the test hole inspection while standing
no deeper than 4 foot deep. The tae of the spoils pile must
be 2 foot from the test hole.
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d. In some cases hand dug test holes may be preferred by the
applicant or designer. Hand dug test holes might be prefer-
able for sites that have a shallow restrictive layers or sites
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where construction equipment could damage the usable soil.
Nevertheless, in all cases, hand dug test holes must be dug
to the specifications fisted above.
C. Site Inspection and Evaluation
1. -Phase One Review
a. LEA staff will inspect the site, log the soil test holes, and
make an initial determination of whether site conditions are
suitable for a standard, gravity system, based on the follow-
ing factors:
(1) 4 ft of native effective soil
(2) Slope less than 34%
(3) Soils in Soil Groups A-E, as identified in Part 3, Chap-
ter 1 of this Manual
b. Site Evaluations will provide the applicant with soil profiles,
the depth of effective soil, the application rate, a statement of
whether the wastewater system would be conventional gravi-
ty or require consultant review and possible supplemental
treatment
2. Phase Two Review
a. If site conditions are not suitable for a standard gravity sys-
tem, the applicant will be asked to select a certified design
consultant, who will contact LEA staff to arrange a joint site
evaluation
(1) The LEA may request joint site evaluation without in-
itially evaluating the site in cases where site condi~
tions are known to be outside of the range described
as suitable for standard, gravity systems as identified
in Part 3, Chapter 1 of this Manual.
{2) After joint site evaluation, sites may be approved for
standard gravity systems where there is less than 4 ft
of native, effective soil provided 3 ft vertical separa-
tion can be maintained.
D. Expiration
Site Evaluations have no expiration date, except for when there is a
change in site conditions adversely affecting the drainfield area or when
there has been a change in regulatory requirements.
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E. Groundwater Monitoring
1. Purpose
a. The LEA routinely requires groundwater monitoring informa-
tion for projects in groundwater concern areas to determine if
on-site wastewater and/or subdivision ordinance require-
ments can be met.
b. Unusual situations may require additional groundwater re-
view of a specific site completed by a professional such as a
registered engineering hydrologist ar geologist.
2. Area Identification
Parcels with suspected seasonal groundwater issues requiring
rainy season monitoring include:
a. Valleys, Ravines, Swales
b. Waterways
c. Confned and Unconfined Sand and Gravel Strata
d. Shallow Topsoil Areas
e. Springs or other indications, such as swampylmarshy ap-
pearance or presence of water-loving vegetation such as
cattails, willows, perennial grasses
f. History of seasonal groundwater in the vicinity of the project
g. Visual indication of seasonal groundwater, such as mottling
or gleying in soil profiles
3. App lication and Coordination
Groundwater monitoring may be conducted in the following cir-
cum stances:
a. As part of apre-application review for a land use project;
b. As a condition for preliminary map approval for land use ap-
plications, where the owner has signed a disclosure docu-
mentfor concurrent review;
c. As a condition for site evaluation approval or as a stand-
alone review, where the applicant has agreed to payment of
the LEA's hourly rate.
d. In ail cases, the certified designer will discuss the monitoring
plan ahead of time with the LEA, and provide the LEA with a
map showing the number and location of monitoring wells.
4. Groundwater Observation Period
a. The groundwater observation period is November through
April.
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b. The LEA may allow the certified designer to install and in-
itiate observation of monitoring wells after November, on a
case-by-case basis, prodded there is reasonable likelihood
that maximum groundwater elevations may still be observed
during the remainder of the groundwater observation period.
c. Snow pack influenced areas may require observation
through the entire spring snowmelt.
5. Collection of Rainfall Data
a. Observation data shall be collected by the certified designer
at least every two weeks during the monitoring period;
b. Additional readings shall be taken by the certified designer
within 2 days following a significant rain, such as when there
has been 1 or mare inches of rainfall within a 24-hour period;
c. Daily observations by the certified designer may be neces-
sary during elevated groundwater periods to identify maxi-
mum groundwater levels;
d. Confirmatory observations will be made periodically by the
LEA.
6. Monitoring Well Design
a. Monitoring well depth should be equal to or greater than the
required depth to groundwater necessary for project approv-
al. The usual depth is eight (8) feet. For larger flaw systems,
deeper wells may be required to assess ground water
mounding.
b. Monitoring weq design should generally be as shown in this
diagram. Holes will be constructed using an auger and fl-
inch diameter pipe shall be used. However, approval of al~
ternate designs will be considered on a case-by~case basis
by LEA staff.
Removable Cap
Mounded~sai]
12InoFres of sealing material, I.e.
ber3torrite nr sou and cemerd mixture
Readings reported as depth y `4-inch sofid.pipe
to vrater belowr natural grade ~,,,
4-Inch perlnreted plpa
Gravel
8-12 Inches
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c. Monitoring wells must be staked and flagged so that they
can be readily located by LEA staff.
7. Certification Criteria
a. Rainfall Data Source
Unless the certified designer justifies another source of rain-
fall data acceptable to the LEA, the following site will be
used far tracking daily and monthly rainfall and for determin-
ing average rainfall:
hftpalwww. ci m is. water. ca. govlci m islinfo. isp
Note: The California Irrigation Management Information System (CIMIS)
is a program in the Office of Water Use Efficiency (OWUE}, California
Department of Water Resources (DWR) that manages a network of over
120 automated weather stations in the state of California. CIMIS was
developed in '1982 by the California Department of Water Resource and
the University of California at Davis to assist California's irrigators
manage their water resources efficiently.
b. Minimum Rainfall fior Certification
(1) Minimum rainfall shall be 80°10 of average for the ob-
servation months of November through April for sites
where, based on geographical location, absence of
restrictive layer, and absence of visual evidence of
seasonal watertable, there appears to be 36 inches or
more of effective soli.
{2) Minimum rainfall shall be 90% of average for the ob-
servation months of November through April for sites
where, based on geographical location, presence of a
restrictive layer, or visual evidence of seasonal wa-
tertable, there may be less than 36 inches of effective
soil.
{3) Low Rainfall Years
(i) Lower rainfall years will normally not be cer-
tifed. However, during multiple years of low
rainfall, a secondary data source may be con-
sidered. After completion of at least one
groundwater observation period (normally No-
vember through April) that does not reach the
average rainfall requirement for certification, an
applicant may submit, for consideration by the
Regional Board and the LEA, a complete
groundwater report prepared by a certified en-
gineering geologist or by a certified hydroge-
ologist.
(ii} The report should contain supporting data for
groundwater elevation conclusions and include
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an analysis of expected maximum groundwater
elevations for the proposed dispersal site.
Elements of the report will include:
- Topographical and geographical charac-
teristics of the site, including slope of the
land, that could affect surface and sub-
surFacedrainage characteristics;
- Soil classification and hydraulic conduc-
tivity of the soil;
- Presence of restrictive layers in the soil
pro#ile;
- Presence of visual indication of season-
al groundwater (e.g. soil mottling) within
the soil profile;
- Historical rainfall patterns and relation-
ship to groundwater monitoring observa~
tuns; and
Depth of observed groundwater in rela-
tionship to minimum soil depth require-
ments and proposed depth of trenches.
(iii) The Regional Board, in consultation with the
LEA, must approve groundwater reports in or-
der to determine that groundwater monitoring
requirements have been met.
8. Determination of Maximum Seasonal Watertable Elevation
a. Maximum seasonal watertable is the highest level of
groundwater determined to be the characteristic level for
the groundwater monitoring well, based on a series of ob-
servations recorded by the certified designer and verified by
representative quality control observations of the LEA. To
assure consistent correlation of of IrEA and certified designer
measurements, the certified designer will notify the LEA
within 24 hours of observing high seasonal watertable in
monitoring wells.
b. Seasonal groundwater levels are known to temporarily spike
in some monitoring wells after periods of heavy rainfall. This
will be allowed to occur in a limi#ed manner (within tolerance
limits} without affecting the groundwater level determined to
be the characteristic level for the monitoring well, provided
the following conditions are met:
(~) The groundwater level spikes must not occur at any
time above the depth proposed for the dispersal field
(with the exception as noted in the table, below; and
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(2} The number of days in which the groundwater is
above the characteristic lave! must not exceed that
which is shown on the following table:
Rainfall as % of Average An-
Waal Rainfall Tolerance for Groundwater Exceed
ing Characteristic Level
(# days within 30 day period)
~ 5% Slope 5°10+ Slope
80% - 110% 2 2
110% - <130% 7 2
130% -<200% 14 2
200%+ 21 {~~ 2
~ t Special Exception: Groundwater may rise to a level above the pro-
posed bottom of the dispersal field for up to 2 days.
c. Groundwater monitoring results will be determined to be un-
satisfactory when the characteristic level of the seasonal
watertable does not meet minimum Butte County soil depth
requirements.
F. Percolation Testing
Percolation tests may be performed by a Certified Installer, Certified De-
signer, or Certified Operation and Maintenance Specialist to provide addi-
tional on appropriate effluent application rate during the site evaluation
process at the discretion of either the LEA or the designing certified de-
signer and when soil conditions warrant. When percolation tests are uti-
lized the following requirements will apply:
1. Test hole preparation requirements
a. Unless otherwise indicated by the LEA, there shall be a min-
imum of 3 percolation test holes when the disposal area and
replacement area are in the same proximity as determined
by the LEA; 6 percolation test holes may be required when
separate areas are chosen for primary and replacement sys-
tems. Additional test holes may be required by the LEA to
completely identify a suitable area.
b. Percolation test holes shall be 6 inches in diameter.
c. Unless otherwise approved by the LEA, the test hole bottom
depth shall be deeper than the proposed drainfieid trench
bottom depth and within the mast restrictive strata of useable
soil beneath the dispersal field.
d. The percolation test hole sidewall in the test section should
be roughened to remove any smearing or compaction
caused by the hole excavation process. All loose soil shall
be removed and 2 inches of pea gravel or other material ap-
proved by the LEA shall be placed in the bottom of the hole.
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e. In order to prevent silting of the bottom of the hale and side-
wall cave-in, a 1-inch sidewall gravel pack shall be used.
The gravel pack shall be perforated plastic pipe in 12 inch
(or longer} sections
2. Presoak requirement
The hole shall be filled with clean water to a minimum depth of 12
inches above the base of the hole. The presoak shall be maintained
for a minimum of 4 hours.
3. Test measurement requirements
a. Percolation tests shall be measured to the nearest 118-inch
from a fixed point.
b. The percolation test shall begin within 4 hours following
completion of the presoak. Adjust the water level to 6 inches
over the pea gravel bottom and begin the test. This may re-
quire adding or removing water to adjust the level.
c. Readings shat[ be taken at 30-minute intervals. Refill as ne-
cessary to maintain 6 inches of water over the pea gravel
bottom at each interval. Readings shall be taken until two
consecutive readings do not vary by more than ten percent
per reading, with a minimum of 3 readings. The last 30
minute interval is used to compute the percolation rate. If 4
inches or more of water seeps from the hole during the 34
minute interval, readings may be taken at 10 minute inter-
vals. Readings shall be taken until 2 consecutive readings
do not vary by mare than ten percent per reading with a min-
imum of 3 readings. The last 10 minute interval is used to
compute the percolation rate.
4. Test rate determination
a. The following correction factor shall be used to determine
the corrected percolation rate:
Hole Diameter Gravel Pack Thickness Correction Factor
6" 1 ~~ 1.59
Calculation:
Standard percolation value (minutes per inch) =
Test percolation value (minutes per inch) X {correction factor)
Example: A six (6) inch hole is used with a one (1} inch gravel
pack. The test percolation value is 25 mpi.
25 mpi {1.59) = 40 mpi
The mean percolation rate calculated from all test hole results ac-
cepted by the LEA shall be the final percolation rate (design per-
colation rate) assigned for sizing the system.
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G. Slopes 15°1°-30%
The site evaluator for parcels with slopes between 15% and 30% shall observe
and note any evidence of slope instabilities in the proposed dispersal field area,
including such indicators as tension cracks on hillsides, old scarps or headwalls,
hummocky terrain, debris deposits below open slopes or in channels, scoured
streat channels or gullies, and tilted or cured tree trunks.
H. Suspected Slope Instability
The site evaluator shall identify and note areas of known or suspected slope in-
stabilities that are within 50 feet of the proposed primary or repair dispersal field
area.
Chapter 2. Construction Permit
A. Application
~ . Construction Permit applications will only be accepted when deter-
mined by the LEA to be complete, including the following informa-
tion:
a. A[I portions of application form completed and legible
b. Complete system design attached, including site plan
c. Payment of all applicable fees
2. The LEA will refer to the Department of Public Works, any site
where it is noted by the applicant that more than one acre of soil
disturbance andlor more than 1,000 cubic yards of grading will take
place.
B. System Design
1. LEA design forms must be used to facilitate efficient design review
2. All required drawings and sketches must be included
3. This portion of the design requires three items that show sufficient
detail to allow the design to be reviewed and the system to be in-
stalled. Checklists are included for each drawing and all applicable
items in the checklist must be shown. Plot plans, design details,
and cross-sections may be combined on one or more design
sheets, provided there is sufficient detail and clarity to specify com-
ponents, dimensions, spacing, and setbacks as outlined in the de-
sign checklists.
a. Scaled Plot Plan
This drawing shows the placement of the septic system in
relationship to the overall development plan for the property.
The plot plan must match the building permit plot plan (the
same sketch is accepted by the building department for their
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application}, and should verify that the system can be in-
stalled in conformance with setbacks and site limitations.
b. Scaled Layout Sketch Detai{
This item shows the detail of the drainfield layout and details
of the system design. The layout detail is intended to be a
close-up of the portion of the plot plan where the septic sys-
tem is located.
c. Cross-Section Detail
This item shows the depth from original grade of the septic
system components. The cross-section is intended to be
used both as a guide for system construction and as verifica-
tion that vertical separation and component depths meet
code.
4. Design forms must be signed and dated by the contractor for stan-
dard gravity systems or by the certified designer for pressure distri-
bution ar supplemental treatment systems.
5. Special design analysis will be performed by the certified designer
for on-site wastewater systems with design flows exceeding 1,500
gallons per day. The analysis will include:
a. Analysis of the potential localizing waste loading effects in-
cluding, at a minimum, groundwater mounding and nitrogen
loading;
b. Minimum criteria fo evaluation of the results of the analysis;
and
c. Incorporation of system design measures to address the
findings of the analysis.
6. Any proposed on-site wastewater primary or repair system within
an Area of Environmental Concern designated as such due to spe-
cial status species populations or habitat shall be surveyed by a
qualified biologist. If the site contains a population of special status
species or habitat critical to the survival of a special status species,
then either an alternative site will be identified, or the biologist will
identify on- and off-site mitigation that is acceptable to County and
to the California Fish and Game.
7. Any proposed on-site wastewater primary or repair system within
an Area of Environmental Concern designated as such due to wet-
lands, riparian habitat, wetlands, or oak woodlands shall be sur-
veyed by a qualified biologist. If the site contains one or more of
these habitat types, then either an alternative site will be identified,
or the biologist will identify on and off site mitigation that is accept-
able to County and to the California Fish and Game. Mitigation may
include construction of replacement woodlands, replanting de-
graded reparian habitat on- or off-site, replanting oak trees, pay-
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ment to the State Oak Woodlands Conservation Fund, orh other
measures approved by the County and State.
8. Any proposed on-site wastewater primary or repair system within
an Area of Environmental Concern designated as such due to an
adopted HCPINCCP shall be surveyed by a qualified biologist to
identify on and off site mitigation that is acceptable to County and to
the California Fish and Game. Mitigation may include avoidance of
especially critical habitat, planting of replacement woodlands, rep-
lanting degraded reparian habitat on- or off-site, replanting oak
trees, or other measures approved by the County and State.
C. Design Stakeout
A Construction Permit application will not be considered complete unless
the designer has. first staked out and ribboned the primary and replace-
ment drainfield areas. This will alert homeowners of these critical deve-
lopmental features so that building and excavation activities can be con-
trolled appropriately. This will also allow the LEA to confirm the adequacy
of designs prior to installation of systems.
D. Notification, Inspection, and Final Approval
1. The installer must contact the LEA and system designer to make
arrangements for an inspection of the system construction. The
system must then be left open far a maximum of two working days,
allowing the installation to be inspected by the designer and the
LEA.
2. The installer will leave a signed as-built drawing at the site in a
sealed, zip lock plastic bag. The LEA will use the checklist on the
as-built form for their inspection and approve or deny cover of the
system based on the LEA's assessment of the installation.
3. The system installation will be verified as complete and within cur-
rent code, and will be given final approval by the LEA, when all the
following actions have taken place:
a. An as-built drawing signed by both the installer and the LEA
is attached to the construction permit.
b. The certified designer {if one was used) verifies that the sys-
tem was constructed in substantial conformance with the de-
sign.
c. The "Installation" box at the bottom of the Construction Per-
mit application is marked "Approved" and signed by the LEA.
d. If an Operating Permit is required:
(1) The certified designer has provided the homeowner
with a system Operation, Monitoring, and Mainten-
ance Manual as described in Part 4 of this Manual.
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(2) The homeowner has recorded the ongoing need for
an Operating Permit on the property deed.
(3} An Operating Permit has been issued as described in
Chapter 3 of this Part.
E. System Repairs, Replacement, Modifications, and Expansions
1. When Construction Permit Required
a. Construction Permits are required to repair or significantly
modify existing on-site wastewater systems. However, these
permits are not required for servicing or replacing installed
mechanical or electrical parts of the systems, including:
(1) Float switches
(2) Pumps
(3) Electrical boxes
(4) Sanitary tees in the septic tanks
(5) Minor structural corrections to the tank
(6) Repairlreplacement of the distribution box, or re-
pair/replacement of the sewer line from the tank to the
distribution box.
2. When Elements of Site Evaluation Required
Unless sufficient site information is available to the LEA, supple-
mental site information, such as soil analysis data, will typically be
required for on-site wastewater system expansion, relocation, re-
pair or replacement.
3. Special Considerations for System Repairs
a. A failing system must be repaired as soon as reasonably
possible.
b. If an immediate repair cannot be accomplished, the LEA
may allow a delay in making the repair. In this case, an en-
forcement order will be issued and the LEA will specify tem-
porary measures required to eliminate any immediate public
health hazard or popution of ground or surface waters.
Chapter 3. Operating Permit
A. Issuance
Operating Permits will be issued by the LEA automatically for all new
pressure distribution and supplemental treatment systems, upon their cer-
tification of completion and, thereafter, upon receipt of a complete applica-
tionfor Operation Permit Renewal.
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B. Valid Operating Permits Required
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Valid Operating Permits will be required by the LEA for verifying the ade-
quacy of pressure distribution and supplemental treatment systems at
their point-of--sale.
C. Required Information
Operating Permit applications and Operating Permit Renewal applications
will include, at a minimum, the following information:
1. Owner name, address, and telephone number
2. Assessor's Parcel Number
3. Traklt number
4. Wastewater system description and as-built drawing
5. Genera! description of O&M program
6. Specific O&M frequency based on system type
7. Date of permit expiration
D. Cleveland Hills Alquest-Priolo Earthquake Fault Zone
Operating Permits shall require, for wastewater systems located within the
Cleveland Hills Alquest-Priolo Earthquake Fault Zone, inspection in the
event of an earthquake centered on the Cleveland Hills Fault resulting in
appreciable surface fault displacement. Any damage to or deficiencies
noted in the wastewater system during this inspection shall be corrected
immediately.
E. Richter Magnitude of 5.0 and Above
Operating Permits shall require, in the event of an earthquake centered
within 25 miles of the County with Richter Magnitude of 5.0 and above,
post-seismic inspection. Any damage to or deficiencies noted in the
wastewater system during this inspection shall be corrected immediately.
Chapter 4. Testing Septic Tanks to Assure Watertight Construction
A. Septic Tanks in Use at Time of Testing
1. Dwelling Occupied
a. If the water level is at the invert of the outlet "T," then return
after 24 hours to recheck the level. If there has been no
measurable drop of the liquid volume in the tank, then the
tank has passed the inspection.
b. If the water level is slightly below the invert of the outlet "T",
then the tank may be leaking at the penetration (knock-out)
for the outlet. All penetrations should be excavated and
sealed with Quickrete or equivalent. After cement cures, fill
to the invert of the outlet tee and return after 24 hours to re-
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check the level. If there has been no measurable drop of the
liquid volume of the tank, then the tank has passed the in-
spection.
c. If the operating level is substantially below the invert of the
outlet "T," or at the tank's seam (for clamshell tanks), then
the tank should be cleaned, and its integrity evaluated.
2. Dwelling Unoccupied
a. Bring the water level up to the invert of the outlet tee and re-
turn after 24 hours to recheck the level. If there has been no
measurable drop of the liquid volume of the tank, then the
tank has passed the inspection.
B. New Construction or Tank Replacement
'[ . AI[ new tanks must be certified by the manufacturer to be water-
tight, allowing no more than 1 % liquid volume loss over a 24 hour
period.
2. All tanks must be tested after installation to be watertight by the fol-
lowing process:
a. Install risers
b. Install and cap inlet and outlet fittings
c. 24 hour pre-soak for concrete tanks
d. Fill tank 2 inches into the riser, and no higher
e. Return after 24 hours. If there has been no measurable drop
of the liquid volume of the tank, then the tank has passed the
inspection.
Chapter 5. Implementation ofi Certifcation Requirements
A. Installers
1. The LEA will develop and maintain an informational packet and an
open-book take-home exam that covers the essential elements of
our local ordinance and manual related to system installation;
2. The person in charge at any job site must have taken and passed
the examination;
3. The LEA will not distinguish between certification to install standard
gravity systems from certification to install pressure distribution or
supplemental treatment systems;
4. The LEA recognizes that many manufacturers and distributors of
proprietary products have their own certification requirements for
installation of their products, but will leave enforcement of that mat-
ter between the certified designer, certified installer, and product
distributor or manufacturer;
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5. The LEA will pra~ide twa local meetings or educational sessions
each year for certified professionals and attendance of these ses-
sions will meet the continuing education requirements for certified
installers;