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1 <br /> S E C O R <br /> - ------Date-- -- July 22, 2044 ---- -— -- ---- - - - - - --- - -- - - <br /> -- - - ---- - -- - --- - <br /> i <br /> Quarter 2Q04 <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 (Second 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 sod 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 Continue pursuit of access to adjacent Taco Bell property <br /> WORK PROPOSED FOR NEXT QUARTER (Third Quarter - 2004). <br /> 1 Perform quarterly groundwater monitoring and sampling <br /> 2 Operate and maintain soil 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 remedial system and ozone sprage 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 Quarterly <br /> Is Free Product(FP) Present Onsite No - <br /> Current Remediation Techniques SVE/GWE (onsite), Batch Extraction (offsite) _ <br /> TPHg removed this quarter(Ibs) 1,736 (SVE), 13 6 (GWE) <br /> MtBE removed this quarter(Ibs) 55 6(SVE), 5 6 (GWE) <br /> TPHg removed -cumulative(Ibs) 23,297 8 (SVE + GWE) <br /> MtBE removed- cumulative (Ibs) 1,875 4 SVE + GWE - <br /> Groundwater extracted this quarter 133,164(GWE), 11,450 Batch Extraction <br /> I, •� Cumulative groundwater extracted 539,404(GWE), 87,694 Batch Extraction <br /> Approximate Depth to Groundwater 29 80-32 30 ft <br /> I WR=49321QMRs1200M2Q1V1R04 doc <br />