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In addition to the general provisions of this chapter and the requirements of the underlying zone, the following minimum standards shall apply to development activities within and adjacent to aquifer recharge areas:

(1) Development activities within an aquifer recharge area shall be designed, developed and operated in a manner that will not potentially degrade groundwater resources nor adversely affect the recharging of the aquifer.

(2) A hydrogeologic study and/or ongoing monitoring may be required to assess impacts of development activities on groundwater resources.

(3) All proposed activities within aquifer recharge areas must comply with the source water source protection requirements of the Federal Environmental Protection Agency, State Department of Health and the Grant County health district.

(4) On-site stormwater facilities shall be designed and installed in all aquifer recharge areas, so as to provide both detention and treatment of all runoff associated with the development.

(5) All development occurring within aquifer recharge areas shall be required to connect to city sewer and water, and on-site sewage disposal shall be prohibited.

(6) Landfills, junkyards/salvage yards, mining, wood treatment facilities, or any other activity that could impair the recharge of critical aquifer recharge areas. Such activities may be permitted in areas with high or moderate recharge potential in accord with applicable zoning regulations, providing the applicant can satisfactorily demonstrate that potential negative impacts to groundwater can be prevented.

(7) All storage tanks, whether above or underground, shall be required to be constructed so as to protect against corrosion for the operational life of the tank, to prevent any release of hazardous substances to the ground, ground waters, or surface waters, and to utilize appropriate containment methods.

(8) Any agricultural activities conducted within aquifer recharge areas shall incorporate best management practices concerning waste disposal, fertilizer/pesticide/herbicide use, and stream corridor management. If necessary applicants shall seek technical assistance from the Grant County Conservation District or the WSU cooperative extension office.

(9) Application of pesticides, herbicides and fertilizers within aquifer recharge areas shall comply with timing and rates specified on product packaging.

(10) Vehicle repair and servicing activities must be conducted over impermeable pads and within a covered structure capable of withstanding normally expected weather conditions. Chemicals used in the process of vehicle repair and servicing must be stored in a manner that protects them from weather and provides containment should leaks occur.

(11) Commercial car washes shall be prohibited inside critical potential recharge areas. Car washes may be permitted inside moderate to high potential recharge areas provided they comply with the Department of Ecology’s Best Management Standards for Vehicle and Equipment Washwater Discharges/Best Management Practices Manual (as hereinafter amended). (Ord. 563 § 1, 2019; Ord. 456 § 1, 2012; Ord. 367 § 2, 2005)