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Date August 8, 2001 <br /> Quarter 2Q01 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2133 Address 2908 Benjamin Holt Dr,Stockton,CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR International Incorporated/Rusty Benkosky <br /> Consultant Project No 077 43235 802 <br /> Primary Agency/Regulatory ID No San Joaquin Co Environmental Health <br /> Assembly Bili 681 Status Property owned by Atlantic Richfield Company <br /> WORK PERFORMED THIS QUARTER (Second Quarter - 2001): <br /> 1 Conducted quarterly groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater report <br /> 3 Operated and maintained AS system SVE system shutdown April 3,2001 <br /> WORK PROPOSED FOR NEXT QUARTER (Third Quarter - 2001): <br /> 1 Conduct quarterly groundwater monitoring and sampling <br /> 2 Prepare and submit quarterly groundwater report <br /> 3 Operate and maintain AS system <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Momtonng/Remediation <br /> Frequency of Groundwater Sampling E-2,E-8 through E-12,PR-1,BDH-1,MW-4,and MW-5 <br /> sampled quarterly,E-3 through E-7,PR-2,BDH-2,MW-1, <br /> MW-2,and MW-3 sampled 1"and 3`a quarters only <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP)Present On-Site No <br /> Cumulative FP Recovered to Date 642 lbs <br /> Cumulative TPHg removed by GWETS 3,980 lbs <br /> Total groundwater extracted 32,000,000 gal <br /> Current Remediation Techniques SVEIAS <br /> TPHg removed by SVE this quarter 0 0 lbs <br /> Cumulative TPHg removed by SVES 4,897 lbs <br /> MtBE Removed this Quarter 0 0 lbs <br /> Cumulative MtBE Removed 4 5 lbs <br /> Approximate Depth to Groundwater 6 to M ft <br /> Groundwater Gradient Northeast to Northwest @ 0 001 to 0 005 <br /> • <br />