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Austin Road Landfill Exp Sion Project <br /> ENVIRONMENTAL IMPACT MITIGATION MEASURE LEVEL OF <br /> SIGNIFICANCE <br /> AFTER <br /> MITIGATION <br /> K.I. Potential seepage of leachate from the Please see Mitigation Measures K.5 and LS <br /> landfill expansion would cumulatively K.6. <br /> affect water quality if not properly <br /> mitigated,and leachate treatment also <br /> could affect air quality. (SIGNIFICANT) <br /> K9. A VOC-contaminated plume extends (a)The implementation of the current IS <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 shall continue 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 /> water shall be supplied as is currently <br /> being done for two affected households. <br /> L. PUBLIC HEALTH AND SAFETY <br /> L.1. Worker exposure to chemical (a) The landfill would not accept any �iS-IS <br /> contamination and particulates during unpermiued special wastes that potentially <br /> landfill operations may exceed levels may contain elevated levels of hazardous <br /> protective of health or safety. substances. <br /> (SIGNIFICANT) <br /> (b)Dust control procedures specified in <br /> the Site Operations Plan would be applied <br /> to handling of all wastes received at the <br /> landfill. <br /> (c)Dust exposure of site workers shall be <br /> periodically measured to determine if <br /> recommended exposure levels are <br /> exceeded. <br /> (d) Additional engineering controls shall <br /> be implemented by the site operator,if <br /> needed, to control dust emissions. Such <br /> 29 <br />