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S E C 0 R <br /> • Dake October 25, 2004 <br /> Quarter 3Q04 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 4932 Address 16 E Harding Way, Stockton, CA <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person SECOR/Rusty Benkosky <br /> Consultant Project No 77BP 54932 04 0336 <br /> Primary Agency/Regulatory ID No San Joaquin County Public Health Services (SJCPHS) <br /> Assembly Bill 681 Status Property owned by ARCO <br /> WORK PERFORMED THIS QUARTER (Third Quarter- 2004) <br /> 1 Performed quarterly groundwater monitoring and sampling <br /> 2 Prepared and submitted quarterly groundwater monitoring report <br /> 3 Prepared and submitted monthly groundwater discharge reports <br /> 4 Operated and maintained soil vapor extraction and groundwater extraction remedial system <br /> 5 Continued with weekly batch extraction events in offsite remedial wells <br /> 6 Connected offsite extraction well EW-7 to the remedial system and brought well online <br /> 7 Obtained access to adjacent Taco Bell property for ozone system remedial compound installation <br /> 8 Submitted encroachment permit package to the City of Stockton for off-site ozone well installations <br /> I <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth Quarter- 2004): <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Operate and maintain sod vapor extraction and groundwater extraction remedial system <br /> 3 Prepare and submit quarterly groundwater monitoring report <br /> 4 Continue with weekly batch extraction events in offsite remedial wells <br /> 5 Prepare and submit monthly groundwater discharge reports <br /> 6 Submit permits for offsite ozone sparge system Installation <br /> QUARTERLY RESULTS SUMMARY <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling MW-1 through MW-11, EW-1 through EW-7, DMW-1 <br /> through DMW-3 and SVE-1 Sampled quarterly <br /> Frequency of Groundwater Monitoring Quarter) <br /> Is Free Product(FP) Present Onsite No <br /> Current Remediation Techniques SVE/GWE (onsite), Batch Extraction offsite <br /> TPHg removed this quarter(lbs) 262 (SVE), 6 7 GWE <br /> MtBE removed this quarter(lbs) 90(SVE), 6 0 (GWE) <br /> TPHg removed -cumulative(lbs) 23,566 5 SVE + GWE <br /> iMtBE removed-cumulative (Ibs) 19714 (SVE +GWE) <br /> Groundwater extracted this quarter 203,800 (GWE), 11,650(Batch Extraction) <br /> I IARC0W9321QMRs120M3QMR04 doc <br />