(1) Aboveground/Underground Storage Tanks or Vaults. Aboveground/underground storage tanks or vaults for the storage of hazardous substances, animal wastes, sewage sludge, fertilizers, or other chemical or biological hazards or dangerous wastes as defined in Chapter 173-303 WAC, or any other substances, solids or liquids in quantities identified by the Clallam County Environmental Health Division, consistent with Chapter 173-303 WAC, as a risk to ground water quality, shall be designed and constructed so as to:

The Administrator may grant a waiver from one or more of the above requirements upon a finding that the aboveground storage activity would not create a significant risk to ground water quality. Aboveground or underground storage facilities designed and maintained according to an approved plan from the U.S.D.A. Natural Resources Conservation Service or Clallam Conservation District are exempt from these requirements but remain under the jurisdiction of the county to ensure compliance with the protective features of the chapter and for enforcement purposes.

(2) Agriculture. New agriculture or hobby farms, shall use best management practices concerning animal keeping, animal waste disposal, fertilizer use, pesticide use, waste water applications, and stream corridor management and seek the technical assistance of the Clallam County Conservation District and Cooperative Extension Agent.

(3) Land Divisions. Divisions of land regulated by CCC Title 29, Clallam County Land Division Code, shall be evaluated for their impact on ground water quality for those areas designated as critical aquifer recharge area. The following measures may be required by the Administrator as a part of the review of the proposed land division based on site conditions after consideration of available data:

(4) Land Disturbing Activities. Land disturbing activities located within the jurisdiction of critical areas shall obtain a certificate of compliance and provide for storm water quality and quantity control, including preparation of a temporary erosion and sediment control plan and permanent drainage plan, consistent with the Stormwater Management Manual for the Puget Sound Basin, prepared by the State Department of Ecology, February, 1992, as amended. This requirement may be waived by the Administrator upon determination that the proposal will not affect the critical area.

(5) Solid or Hazardous Waste Disposal Facilities. Solid or hazardous waste disposal, discharge, storage, or recycling facilities, including but not limited to: moderate risk facilities, underground injection wells, solid waste and recycling transfer sites, landfills, junk yards, salvage yards, auto wrecking yards, shall demonstrate that such facilities will not significantly impact ground water resources.

(6) Parks, Schools and Recreation Facilities. Fertilizer, herbicide and pesticide management practices of schools, parks, and golf courses that maintain large landscaped areas which includes the application of fertilizers, herbicides, pesticides or other chemicals onto an area equal to or larger than five (5) acres shall be evaluated in relation to best management practices to address water quality and supply and shall submit a mitigation plan in accordance with Part Eight of this chapter.

(7) Storm Water Standards for Commercial and Industrial Uses. All new commercial and industrial land uses which either: (a) have greater than 5,000 square feet of impervious area; or (b) handle, store, dispose, transport, or generate hazardous substances/wastes defined as dangerous or extremely dangerous wastes under Chapter 173-303 WAC (regardless of quantity), which may come in contact with storm water runoff including, but not limited to, gas stations and distributors, car washes, trucking companies, and paint shops, shall remove contaminants prior to their point of entry into surface or ground water resources using available and reasonable best management practices as outlined in the Stormwater Management Manual for Puget Sound Basin (Department of Ecology, 1992), as amended, or any drainage design manual for Clallam County or storm water regulations, if applicable. Standard drywells are prohibited except where pretreated using all appropriate and reasonable best management practices. Maintenance of storm water infiltration systems must be assured as a permit condition of the review authority.

(8) Utility Transmission Facilities. Utility facilities which carry oil, gas or any other hazardous substance as defined in Chapter 173-303 WAC shall provide hydrologic information in addition to spill prevention measures and an emergency spill management plan.

(9) Sewage Effluent and Sludge Disposal. Sewage and sludge disposal, except on-site sewage disposal systems releasing less than 14,000 gallons per day and approved consistent with Chapter 246-272 WAC and local health codes must meet Class A reclaimed water and Class B biosolid requirements, shall be prohibited on lands designated as high or moderate susceptibility.

(10) Zoning or Comprehensive Plan Amendment. Prior to taking action on a zoning or comprehensive plan map amendment, the applicant shall complete an environmental assessment that shall be approved by Clallam County, to confirm the nature, extent and rating of critical areas on the property; determine if the subsequent development proposal would be consistent with this chapter; and determine whether mitigation or other measures would be necessary if the proposal were approved. Such review shall occur prior to any SEPA threshold determination pursuant to Chapter 27.01 CCC, Clallam County Environmental Policy. Findings of such review may be used to condition or mitigate the impact through the SEPA threshold determination or to deny the proposed zoning or comprehensive plan map amendment if the impacts are significant and cannot be mitigated.