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R � I <br /> Page 30 <br /> U <br /> 1 <br /> ENVIRONMENTAL IMPACT MITIGATION MEASURE LEVEL OF <br /> SIGNIFICANCE <br /> AFTER <br /> MITIGATION <br /> monitored during Phases V and VI,to be <br /> employed as needed for the extraction of <br /> any residual contamination by leachate. <br /> (d)A review of the liner and leachate <br /> collection system for the vertical <br /> expansion over the existing landfill shall <br /> be conducted by the appropriate <br /> responsible agencies upon completion of <br /> the final design drawings. <br /> K.8. Potential seepage of leachate from the Please see Mitigation Measures K.5 and LS <br /> landfill expansion would cumulatively K6, <br /> affect water quality if not properly <br /> mitigated,and leachate treatment also <br /> could affect air quality. (SIGNIFICANT) <br /> K.9. A VOC-contaminated plume extends (a)The implementation of the current LS <br /> from the northern edge of the landfill RWQCB Order and the recommendation <br /> border to approximately 4,000 feet made in the April 1999 CAP shall be <br /> northeast(downgradient)of the site. continued and completed. The new data to <br /> (SIGNIFICANT) be collected should address the potential <br /> impacts to the local supply wells. The <br /> siting of the new extraction wells can be <br /> modified as appropriate to minimize ` <br /> impact to supply wells. Additional off- <br /> gassing from the air stripper will require <br /> more frequent change out of the activated <br /> carbon vessels. <br /> K.10. Private irrigation wells located (a)The Operator shallcontinue the City of LS <br /> downgradient of the Austin Road Landfill Stockton's program to test all known water <br /> are at risk from the VOC-contaminated supply wells within the area of the mapped <br /> groundwater plumes. (SIGNIFICANT) and projected groundwater plume. Where <br /> detectable VOCs are reported,bottled <br /> E water shall be supplied as is currently <br /> being done for two affected households. <br /> L. PUBLIC HEALTH AND SAFETY <br /> { <br /> L.1. Worker exposure to chemical (a) The landfill would not accept any NS <br /> contamination and particulates during special wastes that potentially may contain <br /> landfill operations may exceed levels elevated levels of hazardous substances. <br /> protective of health or safety. <br /> (SIGNIFICANT) (b)Dust control procedures specified in <br /> the Site Operations Plan would be applied <br /> GRASSETTI ENVIRONMENTAL CONSULTING <br />