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• 30 June 1999 <br /> AGE-NC Project No.95-4185 <br /> Page 5 of 6 <br /> enumeration and physiochemical characteristics, in preparation as a feasibility study. Laboratory <br /> reports for soil analysis and sample chain of custody documentation will be presented in a report <br /> with findings and recommendations. <br /> 3.3. PILOT STUDY <br /> A pilot study is proposed at the site to evaluate several alternatives for soil and ground water <br /> remediation; the proposed pilot study should consist of an eight-hour ground water pump <br /> (drawdown) pilot test. <br /> The proposed drawdown pilot test will be designed to obtain general aquifer characteristics such as <br /> hydraulic conductivity,transmissivity and drawdown at various pumping rates. Results of the eight- <br /> hour drawdown pilot test would evaluate feasibility of induced ground water drawdown. The pump <br /> test will evaluate feasibility of ground water extraction and ex-situ treatment as a remedial <br /> alternative. <br /> • 3.4. PREPARATION OF CORRECTIVE ACTION PLAN <br /> Upon completion of the pilot study, a corrective action plan (CAP) will be prepared presenting the <br /> findings of the pilot study. The corrective action plan will discuss feasibility and cost effectiveness <br /> of several remedial alternatives. Conclusions and applicable recommendations will be included in <br /> the corrective action plan. The report will be in a format acceptable to the PHS-EHD and the <br /> RWQCB, and will be reviewed and signed by a California Registered Geologist. <br /> 4.0. PROCEDURES <br /> All field procedures will be overseen by an AGE representative under the supervision of a California <br /> Registered Geologist. Procedures for drawdown pilot test are outlined below. <br /> 4.1. DRAWDOWN PILOT TEST <br /> _A drawdownpilottest will be performed to evaluate feasibility of ground water drawdown and <br /> radius of ground water influence. Monitoring well MW-4 will be used for the ground water removal. <br /> Monitoring well MW-4 was screened from approximately 28 feet bsg to 8 feet bsg, with four-inch <br /> casing in a ten-inch soil boring. Currently approximately 18 feet of static water reside in the well <br /> . casing, within primarily sand and silty sand sediments. <br /> .4dranced GeoEnvironmental,Inc. <br />