19.03.140 Aquifer Recharge Areas:
A. General. Discharge in to the groundwater of the city shall not contribute contaminants nor facilitate degradation of recharge areas. Development approvals shall ensure that all best management practices are employed to avoid contributing pollutants in to aquifer recharge areas. The requirement for a site analysis shall be based on detailed information on the following items:
1. Hydrogeologic susceptibility to contamination and contamination loading potential
2. Depth to groundwater
3. Hydraulic conductivity and gradient
4. Soil (texture, permeability, and containment attenuation)
B. Development Standards.
1. A site analysis shall be utilized to determine the existing water quality for establishing a baseline which shall serve as a minimum standard that shall not be further degraded by proposed development.
2. Development approvals shall ensure that all best management practices are employed to avoid introducing pollutants into the aquifer. This includes the complete collection and disposal of storm water.
C. Hydrogeologic Assessment Required. A hydrogeologic assessment shall be required for the following land uses:
1. Hazardous substance processing and handling
2. Hazardous waste treatment and storage facility
3. Wastewater treatment plant sludge disposal
4. Solid waste disposal facility
D. Hydrogeologic Assessment Requirements. A hydrogeologic assessment shall be submitted by a firm, agent or individual with documentable environmental expertise. At a minimum, the following parameters shall be considered:
1. Documentable information sources
2. Geologic data pertinent to well logs or borings used to identify information
3. Ambient groundwater quality
4. Groundwater elevation
5. Recharge potential of facility site
6. Current data on wells and any springs located within one thousand feet (1,000') of the facility
7. Surface water location and potential recharge
8. Water supply source for the facility
9. Analysis and discussion of the affects of the proposed project on the groundwater resource
E. Findings and Consideration of Approval. A hydrogeologic assessment must demonstrate that the proposed use does not present a threat of contamination to the aquifer system. Successful demonstration of these findings warrants approval under this section. (Ord. 2134, 11/11/03; Ord. 1532, 1992)