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r , ijll <br /> Date October 25, 1996_ <br /> ARCO QUARTERLY STATUS REPORT <br /> Facility No 2130 Address 7906 EI Dorado Street, Stocktcn California <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Cc /Contact Person EMCON/Jay R Johnson <br /> Consultant Project No 20805-114 006 <br /> Primary Agency/Regulatory ID No Mike Infurna, San Joaquin Cot.nty Public Health Services <br /> WORK PERFORMED THIS QUARTER (Third- 1996) <br /> 1 EMCON performed quarterly groundwater sampling <br /> 2 EMCON compiled and evaluated groundwater monitoring data <br /> 3 EMCON conducted routine operation and maintenance of the re-nediation system <br /> 4 EMCON conducted routine operation and maintenance of the air sparge system <br /> • 5 EMCON collected air samples from the soil vapor extraction (SVE) system on a quarterly basis to <br /> evaluate system performance <br /> 6 EMCON monitored the dissolved oxygen levels in groundwater ,:) evaluate the performance of the <br /> air sparge system <br /> 7 EMCON evaluated the remediation system performance <br /> i <br /> 8 On July 28, 1996, EMCON Observed the well abandonment of monitoring well MW-8 <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth-1996) <br /> 1 ARCO will continue to perform quarterly groundwater monaoring The next sampling event is <br /> tentatively scheduled for December 1996 <br /> 2 EMCON will continue air sparging while monitoring the effect c, sparging of dissolved hydrocarbon <br /> concentrations in groundwater <br /> 3 EMCON will conduct routine operation and maintenance on the -amediation system and will continue <br /> to monitor and optimize the performance of the remediation sys-am In addition, EMCON will collect <br /> air samples from the remediation system for laboratory analysis on a quarterly basis <br /> SAGW TA0805\08051140 6CS 9b\cjb 1 <br />