A. 
Aquifer recharge areas provide a source of potable water and contribute to stream discharge during periods of low flow. Urban-type pollutants may enter watercourse supplies through potential infiltration of pollutants through the soil to ground water aquifers.
B. 
The primary purpose of aquifer recharge area regulations is to protect aquifer recharge areas by providing for regulation of land use activities that pose a risk of potential aquifer contamination and to minimize impacts through the application of strict performance standards.
(Formerly 20.80.420. Ord. 238 Ch. VIII § 7(A), 2000; Ord. 398 § 1, 2006; Ord. 723 § 1 (Exh. A), 2015; Ord. 1045 § 1 (Exh. A), 2025)
Aquifer recharge areas shall be designated and classified based on the soil and ground water conditions and risks to surface water during periods of low hydrology. Classification depends on the combined effects of hydrogeological susceptibility to contamination and contaminant loading potential, and includes upland areas underlain by soils consisting largely of silt, clay or glacial till, upland areas underlain by soils consisting largely of sand and gravel, and wellhead protection areas and areas underlain by soils consisting largely of sand and gravel in which there is a predominantly down-ward or lateral component to ground water flow.
(Formerly 20.80.430. Ord. 238 Ch. VIII § 7(B), 2000; Ord. 398 § 1, 2006; Ord. 723 § 1 (Exh. A), 2015; Ord. 1045 § 1 (Exh. A), 2025)
A. 
The following land uses and activities shall require implementation of best management practices (BMPs) as established by the Department of Ecology:
1. 
Land uses and activities that involve the use, storage, transport or disposal of significant quantities of chemicals, substances or materials that are toxic, dangerous or hazardous, as those terms are defined by State and Federal regulations.
2. 
On-site community sewage disposal systems.
3. 
Underground storage of chemicals.
4. 
Petroleum pipelines.
5. 
Solid waste landfills.
6. 
Stormwater management, including infiltration, and ground water recharge.
B. 
Any uses or activities located in an aquifer recharge area, as defined within this subchapter, that involve the use, storage, transport or disposal of significant quantities of chemicals, substances, or materials that are toxic, dangerous or hazardous, as those terms are defined by State and Federal regulations, shall comply with the following additional standards:
1. 
Underground storage of chemicals, substances or materials that are toxic, hazardous or dangerous is discouraged.
2. 
Any chemicals, substances or materials that are toxic, hazardous or dangerous shall be segregated and stored in receptacles or containers that meet State and Federal standards.
3. 
Storage containers shall be located in a designated, secured area that is paved and able to contain leaks and spills, and shall be surrounded by a containment dike.
4. 
Secondary containment devices shall be constructed around storage areas to retard the spread of any spills and a monitoring system should be implemented.
5. 
A written operations plan shall be developed, including procedures for loading/unloading liquids and for training of employees in proper materials handling.
6. 
An emergency response/spill clean-up plan shall be prepared and employees properly trained to react to accidental spills.
7. 
Any aboveground storage tanks shall be located within a diked containment area on an impervious surface. The tanks shall include overfill protection systems and positive controls on outlets to prevent uncontrolled discharges.
8. 
Development should be clustered and impervious surfaces limited where possible.
9. 
No waste liquids or chemicals of any kind shall be discharged to storm sewers.
10. 
All development shall implement best management practices (BMPs) for water quality, as approved by the City, including the standards contained within the adopted stormwater manual, such as biofiltration swales and use of oil-water separators, and BMPs appropriate to the particular use proposed.
(Formerly 20.80.440 and 20.80.450. Ord. 238 Ch. VIII § 7(C) and (D), 2000; Ord. 398 § 1, 2006; Ord. 723 § 1 (Exh. A), 2015; Ord. 1045 § 1 (Exh. A), 2025)