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Date January 24,2005 <br /> Quarter 4`s Quarter,2004 <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 /> (SJCEHD) _ _ <br /> Assembly Bill 681 Status Property owned by Atlantic Richfield Company <br /> WORK PERFORMED THIS QUARTER (Fourth 2004): <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 subnutted quarterly groundwater monitoring report <br /> 3 Performed operation and maintenance of S VE system <br /> WORK PROPOSED FOR NEXT QUARTER (First 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 (Fourth 2004): <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling MW-1 through MW-8 and VW-1 A 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 _ SV_E Treatment System <br /> GRO Removed This Quarter 30 4eounds (lbs) <br /> Cumulative GRO Removed to Date 124 1lbs <br /> Benzene Removed this Quarter 0 lbs <br /> Cumulative Benzene Removed to 0 lbs <br /> Date <br /> MtBE Removed this Quarter 0 48 lbs <br /> Cumulative MtBE Removed to Date 2 88 lbs <br /> Approximate Depth to Groundwater 47 68 to 50 00 feet below ground surface (b s) T <br /> Groundwater Flow and Gradient ^Southeast @ 0 03 feet/foot(ft/ft) <br /> K\Wproc WJ5 BP ARCON021861Quanerly12004W QTR 04\2186 GWW 4Q04 doc Page 1 <br />