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• <br /> L <br /> Working to Restore Nature <br /> 3164 Cold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)852-6690 <br /> Fax (916)852-6688 <br /> November 1, 1993 <br />• <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> P O Box 5811 <br /> San Mateo, California 94402 <br />• <br /> Subject Status Report, Third Quarter 1993, ARCO Service Station No 2168, 441 <br /> Charter Way, Stockton, California <br /> Mr. Carmel <br /> At the request of ARCO Products Company (ARCO), RESNA industries (RESNA) is <br /> conducting an environmental investigation at the subject site (shown on Plate 1) We have <br /> prepared this status report on the work conducted during the third quarter 1993 Work <br /> included groundwater monitoring <br /> BACKGROUND <br /> RESNA observed drilling of four soil borings (B-1 through B-4) at the site 1n July 1991 <br /> during a Preliminary Tank Replacement Assessment investigation. Residual gasoline <br /> 1 hydrocarbons were detected in soil samples collected from the borings The site was added <br /> to the San Joaquin County Public Health Services, Environmental Health Division pilot <br /> program on August 5, 1991 <br /> In April and May 1992, RESNA observed drilling of eight additional soil borings (B-5 <br /> through B-12) and installation of three groundwater monitoring wells (MW-1 through MW- <br /> 3) and three vapor extraction wells (VW-1 through VW-3) Gasoline hydrocarbons were <br /> detected 1n samples collected from the borings Total o11 and grease (TOG), halogenated <br /> volatile organic compounds, and polychlorinated biphenyls were not detected in the samples <br /> analyzed, however, total extractable hydrocarbons were detected <br /> Dissolved gasoline hydrocarbons were detected in water samples collected from the three <br /> wells Purgeable halocarbons were not detected, except for 1,2-dichloroethane which was <br /> detected in monitoring well MW-2 Fecal and total coliform bacteria were not detected in <br /> the sample collected from well MW-3 <br />�r <br /> i004ccar <br /> 31009-9 <br />