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Kittitas County Shoreline Master Program <br />information on aquifer recharge and susceptibility becomes available. These maps <br />are a reference and do not provide a conclusive or final critical area designation. <br />3. Classification: All Kittitas County shorelands shall be classified as having either a <br />high, medium, or low aquifer recharge potential. At a minimum, classification shall be <br />based on soil permeability and recharge potential as described within the Soil <br />Survey of Kittitas County. Where adequate information is available, aquifer recharge <br />potential shall be further classified based on the recharge potential of surficial <br />geologic materials, presence or absence of restrictive layers, surface and <br />groundwater monitoring data, wellhead protection areas, depth to groundwater, <br />topography (i.e., slopes), and locally adopted groundwater protection plans and <br />studies. Land classified as having a high, medium, or low aquifer recharge potential <br />shall also be classified as having a high, medium, or low susceptibility to <br />contamination of an underlying aquifer, respectively. Based on these criteria, the <br />potential for recharging aquifers or transmitting contaminants to the underlying <br />aquifer is greatest where the aquifer is close to the ground surface, where ground <br />surface slopes are minimal, and where the recharge potential of the soils and/or <br />surficial geologic material is greatest. Allwellhead protection areas shall be <br />designated as highly susceptible critical aquifer recharge areas. Wellhead Protection <br />Areas are the areas defined by the boundaries of the 1O-year time of ground water <br />travel, in accordance with WAC 246-290-135. <br />V. Requlations-critical aquifer recharqe areas protection standards <br />1. Protection standards for critical aquifer recharge areas have been incorporated into <br />the water quality regulations in Section 5.6 and into the provisions for specific <br />shoreline uses in Chapter 4. Such standards shall be considered the minimum <br />necessary to protect critical aquifer recharge areas. <br />2. New use and development in a critical aquifer recharge area shall meet the following <br />standards: <br />a. The proposed use and/or development will not cause contaminants to enter the <br />aquifer and will not significantly adversely affect the recharging of the aquifer. <br />b. The proposed use and/or development must comply with applicable water source <br />protection requirements of the Federal Environmental Protection Agency (EPA), <br />Washington State Department of Health, and the Kittitas County Health <br />Department. <br />c. The proposed use and/or development must be designed and constructed in <br />accordance with a ppl icable stormwater management standards <br />3. When located within an area of medium or high aquifer susceptibility, <br />aboveground/underground storage tanks or vaults for the storage of hazardous <br />substances, animals wastes, sewage sludge, fertilizers, or other chemical or <br />biological hazards or dangerous wastes as defined in WAC Chapter 173-303, or any <br />other substances, solids, or liquids in quantities identified by Kittitas County Public <br />Health, consistent with WAC 173-303, as a risk to groundwater quality, shall be <br />Chapter 5 <br />March 7,2016 <br />85