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Working To Restore Nature <br /> 3164 Gold Camp Drive,Suite 200 <br /> Rancho Cordova,CA 95670 <br /> Phone: (916) 852-6690 <br /> FAX: (916)852-6688 <br /> .Tune 21, 1993 <br /> Mr. Chuck Carmel <br /> ARCO Products Company <br /> P.O. Box 5811 <br /> San Mateo, California 94402 <br /> Subject: Status Report, First Quarter 1993, for ARCO Service Station No. 0548, 1612 <br /> Hammer Lane, Stockton, California. <br /> Mr. Carmel: <br /> At the request of ARCO Products Company (ARCO), RESNA Industries (RESNA) has <br /> } prepared this status report on work conducted during the first quarter 1993 at the subject <br /> site(shown on Plate 1). Work included drilling five soil borings, installing one ground-water <br /> monitoring well, and conducting ground-water monitoring. RESNA over saw the additional <br /> subsurface investigation and Emcon Associates (Emcon) of Sacramento, California, was <br /> contracted by ARCO to conduct the field work for ground-water monitoring. Emcon <br /> subsequently forwarded their field notes and the laboratory reports to RESNA. This work <br /> was conducted to evaluate hydrocarbons in soil, monitor the concentrations of dissolved <br /> hydrocarbons in ground water, and evaluate the direction and gradient of ground-water flow <br /> beneath the site. The locations of monitoring wells and soil borings at the site are shown <br /> on Plate 2. <br /> BACKGROUND <br /> Work performed prior to this quarter included drilling fourteen soil borings and installing <br /> four groundwater monitoring wells and three vapor-extraction wells. Residual hydrocarbons <br /> were analytically identified in soil samples collected from borings near the tank cavity. <br /> 0 Minor concentrations of hydrocarbons were detected in soil samples collected from soil <br /> boring near the dispenser islands. Dissolved gasoline hydrocarbons have been analytically <br /> identified in ground-water samples collected from monitoring well MW-1. Dissolved <br /> gasoline hydrocarbons were not detected in ground-water samples collected from the <br /> remaining wells. <br /> • <br /> • 0331ccar <br /> 30004-8 <br />