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Date October 21,2005 <br /> Quarter 3`a Quarter,2005 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 2186 <br /> Address 3212 North California Street, Stockton, CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person URSNernon Elarth <br /> Consultant Project No 38466462 0A152 <br /> Primary Agency/Regulatory ID No San Joaquin County Environmental Health Department <br /> Assembly Bill 681 Status Property owned by Atlantic Richfield Company <br /> WORK PERFORMED THIS QUARTER (Third 2005): <br /> 1 Performed quarterly groundwater monitoring and sampling The following well locations were unable to be <br /> sampled or monitored due to insufficient water VW-lA,VW-2A,VW-3A,and VW-4 / <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Performed operation and maintenance of SVE system <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 2005): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Prepare and submit quarterly groundwater monitoring report <br /> 3 Perform operation and maintenance of SVE system <br /> • QUARTERLY RESULTS SUMMARY (Third 2005): <br /> Current Phase of Project Monitoring/ Remediation <br /> Frequency of Groundwater Sampling MW-1 through MW-8 and VW-1A through VW-4 sampled <br /> Quarterly <br /> Frequency of Groundwater Quarterly <br /> Monitoring <br /> Is Free Product(FP) Present on Site No <br /> FP Recovered this Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Bulk Soil Removed this Quarter <br /> Bulk Soil Removed to Date <br /> Current Remediation Techniques SVE Treatment System <br /> GRO Removed This Quarter 196 9 pounds (Ibs) <br /> Cumulative GRO Removed to Date 1,142 6 lbs <br /> Benzene Removed this Quarter 0 00 lbs <br /> Cumulative Benzene Removed to 0 09 lbs <br /> Date <br /> MTBE Removed this Quarter 0 84 lbs <br /> Cumulative MtBE Removed to Date 6 60 lbs <br /> Approximate Depth to Groundwater 47 97 to 49 79 feet below ground surface b s <br /> Groundwater Flow and Gradient Northwest to Nosh-NeAheast @ W to 0 01 feet/foot ft/ft <br /> Y yn 0.0`0'7 <br /> K 1Wp,o ssUS BP ARC0W21861Q.tte,ly\2005\�QTR 0512186 GWMR 3Q05 do Page 1 <br />