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Date February 26, 2001 <br /> . Quarter 4Q2000 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2093 Address 3425 Tracy Boulevard,Tracy,California <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR International Incorporated/Rusty Benkosky <br /> Consultant Project No 077 41928 804 <br /> Primary Agency/Regulatory ID No San Joaquin County Environmental Health <br /> Assembly Bill 681 Status Property Owned by Atlantic Richfield Company <br /> WORK PERFORMED THIS QUARTER (Fourth Quarter—2000): <br /> 1 Performed quarterly groundwater monitoring <br /> 2 Submitted quarterly groundwater monitoring report <br /> 3 Performed operation and maintenance on SVE/AS systems <br /> 4 Continued to pulse SVE/AS system <br /> WORK PROPOSED FOR NEXT QUARTER (First Quarter—2001): <br /> 1 Prepare and submit quarterly groundwater monitoring report <br /> 2 Perform quarterly groundwater monitoring event <br /> 3 Perform operation and maintenance on SVE/AS systems <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project MonitoringJRemediation <br /> Frequency of Groundwater Sampling Wells ATR-2,ATR-4,ATR-5, ATR-7,ATR-8,and ATR-12= <br /> Quarterly Wells ATR-1, ATR-3,ATR-6, ATR-9, ATR-10,and <br /> ATR-11 = I"and 3`d quarters <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP)Present On-Site No <br /> FP Recovered this Quarter None <br /> Cumulative FP Recovered to Date <1 gallon <br /> Current Remediation Techniques SVES/AS <br /> TPHg removed by SVES this quarter 11 9 lbs <br /> Cumulative TPHg removed 3,611 9 lbs <br /> Approximate Depth to Groundwater 8 'h to 13 feet <br /> Groundwater Gradient East-northeast @ 0 003 ft/ft <br />