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lrANuA <br /> ��1w <br /> Working to Restore Nature <br /> izrc) <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916) 852-6690 <br /> Fax: (916),852-6688 <br /> February 16, 1994 <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 2130 <br /> 7906 North El Dorado Street, 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 duffing the fourth.quarter. 1993. Work <br /> included installing two groundwater monitoring wells offsite, conducting groundwater <br /> monitoring and the installation of.piping for the remediation system. The locations of the <br /> wells are shown on Plate 2. <br /> BACKGROUND <br /> Environmental work performed at the site has included drilling-20 soil, borings onsite and <br /> two'borings offsite and installing ten:..vapor-'extraction wells, five groundwater monitoring <br /> wells onsite and-two offsite, one air sparge well, and three sparge monitoring points in the <br /> borings at the site. Residual hydrocarbons were detected in soil'to' 60 feet below grade at <br /> the groundwater interface near the existing tanks; however,.gasoline hydrocarbons were not <br /> detected in the offsite soil-borings. Dissolved hydrocarbons were detected at concentrations <br /> above Maximum Contaminant Levels in water sampled from the five onsite and two-offsite <br /> groundwater monitoring wells. <br /> 1213ccar/30003-9 <br /> V <br />