A. New Development Prohibitions. The following types of new development shall not be permitted within designated critical aquifer recharge areas:
1. Solid or hazardous waste landfills;
2. Ground application of septage;
3. Underground storage of heating oil in excess of 1,100 gallons for consumptive use on the parcel where stored;
4. Creosote manufacturing or treatment;
5. Chemical manufacture or reprocessing of any extremely hazardous waste as defined by RCW 70.105.010(6) and listed in Chapter 173-303 WAC.
6. Mining of any type below the water table;
7. Processing, storage, and disposal of radioactive substances;
8. Hydrocarbon extraction; and
9. On-site septic systems on lots smaller than one acre without a treatment system design that results in effluent nitrate-nitrogen concentrations below ten (10) milligrams per liter.
B. Development Standards. The following standards apply to development within a critical aquifer recharge area:
1. New subdivisions (a subdivision of five [5] or more lots) shall require a storm water collection, treatment, and disposal system designed by a Professional Engineer and approved by the City.
2. Sewage Disposal. All residential, commercial, or industrial development proposals located in or adjacent to a critical aquifer recharge area shall be connected to the City’s sewer system pursuant to requirements of Section 11-5-3(c) of Title 11, Unified Development.
3. A person seeking the following types of new construction activities is responsible for preparing a critical aquifer recharge area report:
a. Industrial and commercial agricultural facilities applying fertilizers or pesticides in excess of agronomic rates;
b. Golf courses or other recreational or institutional facilities that involve extensive turf cultivation or maintenance;
c. Above-ground storage tanks, with the exception of water tanks;
d. Industrial or commercial facilities that, when completed, will use, store, or handle dangerous wastes in quantities in excess of five (5) gallons or twenty-five (25) pounds or more of any one substance, or in aggregate quantities of twenty (20) gallons or one hundred (100) pounds or more of all dangerous wastes; and
e. Commercial underground storage tanks in excess of 1,100 gallons.
C. The Critical Aquifer Recharge Report shall include the following information:
1. A detailed description of the proposed project including all physical components, processes, and activities that have potential to contaminate groundwater; and
2. A hydrogeologic evaluation that includes, at a minimum, a description and/or evaluation of the following:
a. Site location, topography, drainage, and surface water bodies;
b. Soils and geologic units underlying the site;
c. Ground water characteristics of the area, including flow direction, gradient, and existing groundwater quality;
d. The location and characteristics of wells and springs within three hundred feet (300') of the perimeter of the property;
e. An evaluation of existing on-site groundwater recharge; and
f. An evaluation of the potential impact of the proposal on groundwater quality, both short and long term, based on an assessment of the cumulative impacts of the proposal in combination with existing and potential future land use activities.
D. Qualifications of Report Preparers. Critical aquifer recharge area reports prepared pursuant to this section shall be prepared by a Professional Engineer registered by the State of Washington and trained and qualified to analyze geologic, hydrologic, and ground water flow systems, or by a geologist or hydrogeologist who has received a degree from an accredited four-year college or university and who has relevant training and experience in analyzing geologic, hydrologic, and ground water systems. Such qualifications shall be demonstrated to the satisfaction of the Director. (Ord. 985, 10-5-2020)