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r <br /> Date June 12, 1997 <br /> ARCO QUARTERLY STATUS REPORT <br /> Facility No 02168 Address 441 Charter Way, Stockton, California <br /> ARCO Environmental Engineer Kyle Christie <br /> Consulting Co/Contact Person EMCON/Jay R Johnson _ <br /> Consultant Project No 20805-146 010 <br /> Primary Agency/Regulatory ID No Ron Rowe, San Joaquin County Public Health Services <br /> WORK PERFORMED THIS QUARTER (First 1997) <br /> 1 EMCON performed quarterly groundwater sampling <br /> 2 EMCON compiled and evaluated groundwater monitoring data <br /> 3 EMCON conducted routine operation and maintenance (O&M) of the soil vapor extraction (SVE) <br /> remediation system <br /> 4 EMCON collected air samples from the SVE system on a monthly basis to evaluate system <br /> performance <br /> • <br /> 5 EMCON evaluated and optimized the remediation system performance <br /> WORK PROPOSED FOR NEXT QUARTER (Second 1997) <br /> 1 EMCON will continue to perform quarterly groundwater monitoring for ARCO The next sampling <br /> event is tentatively scheduled for May 1997 EMCON will collect groundwater samples that will be <br /> analyzed for total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene, and <br /> total xylenes, and methyl tert-butyl ether In addition, samples collected from wells MW-2 and MW-6 <br /> will be analyzed for total oil and grease <br /> 2 EMCON will continue O&M, and optimization when necessary, of the SVE remediation system <br /> 3 EMCON will collect air samples from the remediation system for laboratory analysis on a monthly <br /> basis <br /> Current Phase of Project Remediation <br /> Frequency of Groundwater Sampling Quarterly <br /> Frequency of Groundwater Monitoring Quarter! <br /> Sample Date February 24, 1997 _ <br /> • Is Free Product(FP) Present On Site No <br /> FP Recovered this Quarter NA <br /> SALIN 1P7010 80 510 8 0 5 1 46 1 OBS-961cjb i Rev 0 6112197 <br />