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v1117 Lone Palm Ave,Suite 201 <br /> Modesto,CA 95351 <br /> Phone:209-579-2221 <br /> (: %TCIFax: 209-579-2225 <br /> L: ♦ Criterion 6: <br /> This alternative can be reasonably implemented given the current site use and conditions. <br /> During construction of the remediation system there would be disruption to on-site activities. <br /> The equipment compound aesthetics and operation and maintenance activities are minimal <br /> and are not likely adverse to the community. <br /> 5.0 RECOMMENDATIONS <br /> ATC has selected groundwater extraction with biological augmentation and reinjection as the <br /> remediation approach at this site. This approach was selected based on known success using this <br /> biological augmentation at several sites in the Valley. Additionally, both soil and groundwater <br /> can be treated using this approach. Success of biological augmentation is predicated on viable <br /> subsurface conditions and an ideal biological environment. <br /> Feasibility testing in association with technology specific sample collection and analyses are a <br /> critical aspect in the process. As discussed herein, ATC recommends conducting both an aquifer <br /> pumping test and several "slug" tests to .evaluate the groundwater hydraulic properties. <br /> Additionally, technology specific soil and groundwater tests, which include geotechnical soil <br /> C analyses, soil percolation tests, and heterotrophic plate count tests will be required to assure that <br /> the necessary site conditions are available. <br /> Upon Agency concurrence, a detailed workplan will be prepared summarizing the appropriate <br /> path-forward steps. <br /> L� <br /> r <br /> L <br /> r <br /> L� <br /> s:\cnvironmcntal\22493\rcports\fcasibility.doc 12 <br /> i.r <br />