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s _ AM <br /> AMA <br /> Working to Restore Nature <br /> 0' <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone: (916) 852-6690 <br /> Fax: (916)852-6688 <br /> May 11, 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 and <br /> Problem Assessment'Report <br /> ARCO Service Station 0548 <br /> 1612 Hammer Lane, 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 and Problem Assessment Report on the work conducted during <br /> the fourth quarter 1993 and cumulative work conducted at the site. Work conducted during <br /> the fourth quarter of 1993 included installing one groundwater monitoring well and one <br /> vapor extraction well and performing groundwater monitoring. The locations of the wells <br /> and other site features are shown on Plate 2. <br /> BACKGROUND <br /> From December 1990 through April 1993, RESNA observed the drilling of nineteen borings <br /> (B-1 through B-19) and installation of five groundwater monitoring wells (MW-1 through <br /> MW-5) and three vapor extraction wells (RESNA, June 26, 1992, Report 30004-4 and <br /> RESNA,June 21,1993,Report 30004-8). Residual hydrocarbons were analytically identified <br /> in soil samples collected from the borings near the tank cavity. Low concentrations of <br /> hydrocarbons were detected in soil samples collected from borings near the dispenser <br /> islands. Cumulative results of analyses of soil and groundwater samples are included in <br /> Tables 1 and 2. <br /> 1213ccar/30004-8 <br /> 0 <br />