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• Date December 22, 1997 <br /> ARCO QUARTERLY STATUS REPORT <br /> Facility No2Q 168 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 (Third 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 quarterly basis to evaluate system <br /> performance <br /> • 5 EMCON evaluated and optimized the remediation system performance <br /> �W�ORK PROPOSED FOR NEXT QUARTER (Fourth 1997) <br /> \1 ) EMCON will continue to perform quarterly groundwater monitoring for ARCO The next sampling <br /> event Is tentatively scheduled for November 1997 Groundwater samples will be collected and <br /> analyzed for total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene, and <br /> total xylenes, and methyl tert-butyl ether <br /> 1 <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 quarterly <br /> basis <br /> Current Phase of Project Remediation <br /> Frequency of Groundwater Sampling Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sample Date August 21, 1997 <br /> Is Free Product(FP) Present on Site No <br /> •i FP Recovered This Quarter NA <br /> SA0N\PJ0\0805\08051461 ODS 97\cbell 1 <br />