HomeMy WebLinkAbout4074 1 Ordinance No. 4074
2 AN ORDINANCE AMENDING SECTION 33A-5 OF CHAPTER 33A OF THE BUTTE
3 COUNTY CODE, ENTITLED "BASIN MANAGEMENT OBJECTIVES"
4
5 The Board of Supervisors of the County of Butte ordains as follows:
6 Section 1. Section 33A-5 is amended to read as follows:
7 33A-5-Basin Management Objectives.
8 (a) Basin Management Objectives shall be established for:
9 (1) Groundwater elevation;
10 (2) Groundwater quality(temperature,pH and electrical conductivity); and
11 (3) Land subsidence.
12 (b) BMOs shall be based on criteria utilizing data collected from the monitoring network.
13 (c) BMO Groundwater Elevation Criteria. One (1) of the following methodologies shall be used to
14 determine the groundwater elevation BMO for wells selected as part of the monitoring network:
15 (1) Historic Range Method:
16 This method is used to establish two BMOs for each well based on spring and fall data,
17 respectively.
18 i. For wells that have a period of record dating back to at least 1970, the BMO will be
19 based on the historic low groundwater elevation measurement plus twenty percent(20%)
20 of the range in measured groundwater elevations, calculated from the first year on record
21 through 2006.
22 a. The BMO Alert Stage 1 will be reached for measurements below the BMO.
23 b. The BMO Alert Stage 2 will be reached if measurements are below the historic
24 low.
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1 ii. For wells that do not have a period of record dating back to 1970, the BMO will be
2 based on the historic low groundwater elevation measurement taken prior to 2006.
3 a. The BMO Alert Stage 1 will be reached for measurements below the BMO.
4 b. The BMO Alert Stage 2 will be reached for measurements below the historic low
5 minus the range of measurements for the period of record through 2006.
6 (2) Specific Depth Method: The BMO will be set at five (5) feet below the average spring
7 groundwater elevation,where the average spring elevation is calculated from the first year on record
8 through 2006.
9 i. The BMO Alert Stage 1 will be reached if measurements are below the established BMO
10 for that well.
11 ii. The BMO Alert Stage 2 will be reached if BMO Alert Stage 1 continues for a second
12 consecutive year.
13 iii. The BMO Alert Stage 3 will be reached if groundwater levels fall ten (10) feet or more
14 below the average spring groundwater elevation established for the well.
15 (d) BMO Groundwater Quality Criteria.
16 (1) The BMO Alert Stage for temperature will be reached when the measurement is more than
17 five(5) degrees outside of the historic range of measurements.
18 (2) The BMO Alert Stage for electrical conductivity (EC uS) will be reached for measurements
19 greater than 900 for drinking water or greater than 700 for agricultural water.
(3) The BMO Alert Stage for pH will be reached for measurements below 6.5 or above 8.5
20
21 (e) BMO Land Subsidence Criteria.
22 (1) Alert Stage 1 will be reached if annual elastic subsidence exceeds the average annual elastic
23 subsidence measured over the period of record of the extensometer.
24 (2) Alert Stage 2 is reached when the annual elastic subsidence exceeds the maximum recorded
25 elastic subsidence over the period of record for the extensometer.
1 (3) Alert Stage 3 is reached when inelastic subsidence is detected based on annual measurements
2 taken on March 1.
3 Section 2. Severability.
4 If any provision of this Ordinance or the application thereof to any person or circumstances
5 is for any reason held to be invalid by a court of competent jurisdiction, such provision shall be
6 deemed severable, and the invalidity thereof shall not affect the remaining provisions or other
7 applications of the Ordinance which can be given effect without the invalid provision or
8 application thereof.
9 Section 3. Effective Date and Publication. This Ordinance shall take effect thirty (30) days after
10 the date of its passage. The Clerk of the Board of Supervisors is authorized and directed to
11 publish this ordinance before the expiration of fifteen (15) days after its passage. This Ordinance
12 shall be published once, with the names of the members of the Board of Supervisors voting for
13 and against it in the Chico Enterprise Record, a newspaper of general circulation published in the
14 County of Butte, State of California.
15 PASSED AND ADOPTED by the Board of Supervisors of the County of Butte, State of
16 California, on the 14th day of January, 2014, by the following vote:
17 AYES: Supervisors Connelly, Wahl, Kirk, Lambert, Teeter
18 NOES: None
19 ABSENT: None
Chair of the Board of Supervisors
20 NOT VOTING: None
21
22 ATTEST:
23
Paul Hahn 7
Chief Administrative Officer
24 and Clerk 6filig,' m, �r '
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25 By
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