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r <br /> YT- <br /> Date May 8,2002 <br /> . Quarter 1Q02 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2093 Address 3425 Tracy Blvd,Tracy,CA <br /> Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR/Rusty Benkosky <br /> Consultant Project No 77BP 52093 00 0801 <br /> Primary Agency/Regulatory ID No San Joaquin County Public Health Services (SJCPHS) <br /> Assembly Bill 681 Status Property owned by Atlantic Richfield Company <br /> WORK PERFORMED THIS QUARTER (First Quarter - 2002): <br /> 1 Performed quarterly groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Performed operation and maintenance on soil vapor extraction/air sparge(SVE/AS)systems <br /> WORK PROPOSED FOR NEXT QUARTER (Second Quarter - 2002): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Prepare and submit quarterly groundwater monitoring report <br /> . 3 Perform operation and maintenance on S VE/AS systems <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Protect 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 I"and 3'a 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 S VE/AS <br /> TPHg removed by S VE this quarter None <br /> Cumulative TPHg removed 3,616 6 lbs <br /> Approximate Depth to Groundwater 83/4-12'2 ft <br /> Groundwater Flow and Gradient Northeast @ 0 002 ft/ft <br /> i <br />