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s <br /> sh rr <br /> •` Date 7/8/2002 <br /> Quarter 2Q02 <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 SECOR/Rusty Benkosky <br /> Consultant Project No 77BP 50595 010702 <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 (Second Quarter—2002): <br /> 1 Performed groundwater monitoring and sampling(including onsite water supply wells,WSW and DW-2) <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Subnutted"Addendum#3 to Work Plan for Granular Activated Carbon Treatment of WSW Well"dated April <br /> 2,2002 <br /> 4 Prepared and submitted"Monthly System Performance Summary-April 2002"dated May 15,2002 <br /> 5 Prepared and subnntted"Monthly System Performance Summary-May 2002"dated June 11,2002 <br /> 6 Performed additional site assessment <br /> WORK PROPOSED FOR NEXT QUARTER (Third 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 Prepare and submit report documenting additional site assessment <br /> 4 Prepare and submit monthly system performance summary for June and July <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Monitoring <br /> Frequency of Groundwater Sampling MW-1 through MW-7,WSW-1,and DW-2 sampled quarterly <br /> DW-1 influent and effluent sampled monthly <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 ih to 63 3/4 ft <br /> Groundwater Flow and Gradient Linearly inward @ 0 001 ft/ft <br />