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"AMFuAM <br /> Working to Restore Nature <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 852-6690 <br /> Fax (916) 852-668$ <br /> E C E I E UO' <br /> r � <br /> February 15, 1994 MAR 14 '1994 <br /> 1994 <br /> ENVIRONMENTAL H AAJPl <br /> PERMIT/16ERVIGL5 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> P O Box 5811 <br /> San Mateo, California 94402 <br /> Subject Status Report, Fourth Quarter 1993 <br /> ARCO Service Station 2168 <br /> 441 Charter Way, Stockton, California <br /> Mr Carmel <br /> At the request of ARCO Products Company (ARCO), RESNA Industries Inc (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 Loudhjquarter Work <br /> included a supplemental investigation and groundwater monitoring. The supplemental <br /> investigation consisted of installing two offsite gmundwater monitoring wells and collecting <br />' soil samples Groundwater monitoring consists of measuring depths to groundwater, <br /> collecting groundwater samples from the wells for subjective and laboratory analyses, and <br /> evaluating the groundwater gradient and direction of groundwater flow beneath the site <br /> i <br /> BACKGROUND <br /> RESNA observed drilling of four soil borings (B-1 through B-4) at the site in July 1991 <br /> during a Preliminary Tank Replacement Assessment investigation. Residual gasoline <br /> 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 in samples collected from the borings. Total oil and grease (TOG), halogenated <br /> 1130ccar/31009-9 <br />