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J' <br /> Date November 28,2001 <br /> CQuarter 3Q01 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2093 Address 3425 Tracy Blvd ,Tracy,CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR/Rusty Benkosky <br /> Consultant Project No 077 43210 803 <br /> Primary Agency/Regulatory ID No San Joaquin County Public Health Services(SJCPHS) <br /> Assembly Bill 681 Status Property owned by ARCO <br /> WORK PERFORMED THIS QUARTER (Third Quarter- 2001): <br /> 1 Performed quarterly groundwater momtormng and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Performed operation and maintenance on soil vapor extractionlarr sparge(SVE/AS) systems <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth Quarter - 2001): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> r, 2 Prepare and submit quarterly groundwater morutormg report <br /> ( 3 Perform operation and maintenance on SVE/AS systems <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling ATR-2,ATR-4,ATR-5,ATR-7,ATR-8,and ATR-12 sampled <br /> quarterly,ATR-1,ATR-3, ATR-6,ATR-9,ATR-10,and <br /> ATR-11 sampled 1"and 3"d quarters only <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP)Present Onsite No <br /> FP Recovered this Quarter None <br /> Cumulative FP Recovered to Date <1 gallon <br /> Current Remediation Techniques SVE/AS <br /> TPHg removed by SVE this quarter None <br /> Cumulative TPHg removed 3,616 6 lbs <br /> Approximate Depth to Groundwater 9-123/4 ft <br /> Groundwater Flow and Gradient North and west @ 0 003 to 0 015 ft/ft <br /> I <br />