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Date April 25,2002 <br /> Quarter 1Q02 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 595 Address 6100 N Highway 99,Stockton,CA <br /> Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECORIRusty Benkosky <br /> Consultant Project No 77BP 50595 010701 <br /> Primary Agency/Regulatory ID No San Joaquin County Public Health Services <br /> (SJCPHS) <br /> Assembly Bill 681 Status Property owned by Madeline Scannavino <br /> WORK PERFORMED THIS QUARTER (First Quarter—2002): <br /> 1 Performed groundwater monitoring and sampling (including onsite water supply well,WSW) <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Prepared and submitted"Work PIan for Additional Site Assessment"dated February 15,2002 <br /> 4 Obtained access agreements and sampled domestic wells DW-1 (Wemnerschnitzel well) and DW-2(Auto <br /> factory well) <br /> . 5 Submrutted"Work Plan for Granular Activated Carbon Treatment of Wemnerschnmtzel Water System Well" <br /> dated February 19,2002 <br /> 6 Installed wellhead treatment facility <br /> WORK PROPOSED FOR NEXT QUARTER (Second Quarter - 2002): <br /> 1 Perform quarterly groundwater monitoring and sampling(including WSW,DW-1,and DW-2) <br /> 2 Prepare and submit quarterly groundwater monitoring report <br /> 3 Perform additional site assessment <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-7,WSW-1,DW-1, and DW-2 sampled quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Is Free Product(FP)Present Onsite No <br /> FP Recovered this Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Current Remediation Techniques NA <br /> Approximate Depth to Groundwater 58 1/4 to 641/4 ft <br /> Groundwater Flow and Gradient Northeast/variable @0 005—0 025 ft/ft <br /> • <br />