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In addition to the substantive requirements of SMC 14.255.100, the following requirements shall apply to critical aquifer recharge areas:

A. Proposed developments shall not cause contaminants to enter the aquifer or significantly reduce the recharging of the aquifer and shall comply with the water source protection requirements and recommendations of the U.S. Environmental Protection Agency, Washington State Department of Health, and county health department.

B. Underground facilities for storing hazardous substances shall be designed to prevent releases due to corrosion or structural failure for the operational life of the tank.

C. Above-ground facilities for storing hazardous substances shall be designed to prevent accidental release, shall have a primary containment enclosing or underlying the tank, and shall have a secondary containment built into the tank structure or consisting of an external dike.

D. Vehicle repair and servicing shall be conducted over impermeable pads, within a covered structure capable of withstanding normal weather conditions. Chemicals shall be stored in a manner that protects them from weather and provides containment should leaks occur. Dry wells are prohibited.

E. Application of household pesticides, herbicides, and fertilizers shall not exceed times and rates specified on the packaging.

F. Surface percolation or injection of reclaimed water shall conform to adopted water and sewer comprehensive plans, pursuant to RCW 90.46.080(1), RCW 90.46.010(10), and RCW 90.46.042.

G. The uses listed below shall be conditioned as necessary to protect critical aquifer recharge areas in accordance with the applicable state and federal regulations and to the extent that a City approval is required for said uses.

Statutes, Regulations, and Guidance Regarding Groundwater-Impacting Activities


Statute – Regulation – Guidance

Above Ground Storage Tanks

Chapter 173-303-640 WAC

Animal Feedlots

Chapter 173-216 WAC, Chapter 173-220 WAC

Automobile Washers

Chapter 173-216 WAC, Best Management Practices for Vehicle and Equipment Discharges (Washington Department of Ecology WQ-R-95-56)

Below Ground Storage Tanks

Chapter 173-360 WAC

Chemical Treatment Storage and Disposal Facilities

Chapter 173-303-182 WAC

Hazardous Waste Generator

Chapter 173-303 WAC (Boat Repair Shops, Biological Research Facility, Dry Cleaners, Furniture Stripping, Motor Vehicle Service Garages, Photographic Processing, Printing and Publishing Shops, etc.)

Injection Wells

Federal 40 CFR Parts 144 and 146, Chapter 173-218 WAC

Junk Yards and Salvage Yards

Chapter 173-304 WAC, Best Management Practices to Prevent Stormwater Pollution at Vehicles Recycler Facilities (Washington Department of Ecology 94-146)

Oil and Gas Drilling

Chapter 332-12-450 WAC, Chapter 173-218 WAC

On-Site Sewage Systems (Large Scale)

Chapter 173-240 WAC

On-Site Sewage Systems (< 14,500 gal/day)

Chapter 246-272 WAC, Local Health Ordinances

Pesticide Storage and Use

Chapter 15.54 RCW, Chapter 17.21 RCW


Chapter 173-303 WAC, Chapter 173-304 WAC, Best Management Practices to Prevent Stormwater Pollution at Log Yards (Washington Department of Ecology, 95-53)

Solid Waste Handling and Recycling Facilities

Chapter 173-304 WAC

Surface Mining

Chapter 332-18-015 WAC

Waste Water Application to Land Surface

Chapter 173-216 WAC, Chapter 173-200 WAC, Washington Department of Ecology Land Application Guidelines, Best Management Practices for Irrigated Agriculture