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s � <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> JOG[KHANNA M.D,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (160I East Hazelton Avenue) • Stockton, California 95201 <br /> (209) 468-3400 <br /> -\Z1, <br /> GERALD SPERRY J <br /> PESTANA TRUST <br /> FREEMAN BROWN SPERRY <br /> 1818 GRAND CANAL BLVD <br /> STOCKTON CA 95207 FEB 1 '~ <br /> RE: Reeves Exxon SITE CODE: 1397 <br /> 2360 East Rd. <br /> Tracy, CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed correspondence from Gerald Sperry dated January 26, 1993 and has the <br /> following comments. <br /> Of the two remediation proposals referred to in your letter, only soil vapor extraction <br /> (SVE) has been utilized within this county on sites where gasoline has been eleased into <br /> the soil. PHS/EHD understands that SVE may address the gasoline an it's onstituents <br /> but may not effectively remediate any release from the diesel from tank PHS/EHD <br /> recommends vapor extraction tests be conducted prior to choosing this alternative. A <br /> workplan for installation of vapor extraction wells would be required. <br /> The other remediation alternative proposed, in situ bioremediation, has not been used in <br /> San Joaquin County to date. A detailed corrective action plan would have to be <br /> submitted to PHS/EHD and Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) for review and comment. Injecting treated water back into the aquifer will <br /> require a "Waste Discharge Permit" from CVRWQCB. <br /> Prior to any proposal for remediation, the site's groundwater and soil contamination <br /> should be delineated. Data that supports "zero" line delineation does not exist for the <br /> north east corner of the site, downgradient of the tank pit area. Estimated zero lines as <br /> submitted by Resna, will need to be confirmed with analytical data and repeatable water <br /> sampling events. PHS/EHD recommends that the next phase of investigation incorporate <br /> techniques that will identify the lateral limits of soil and groundwater contamination prior <br /> to any proposal to remediate this contamination. Please note any off-site investigation <br /> requires written approval from the property owner and should be included in the <br /> workplan. <br /> A Division of San Joaquin County Health Cam Services <br />