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1 <br /> Working to Restore Nature <br /> 1 <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)852-6690 <br /> Fax (916)852-6688 <br />► October 14, 1993 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> P O Box 5811 <br /> San Mateo, California 94402 <br /> Subject Status Report, Third Quarter 1993, ARCO Service Station No 6020, 1711 <br /> East Yosemite, Manteca, California. <br />` Mr Carmel <br /> At the request of ARCO Products Company (ARCO), RESNA Industries (RESNA) has <br /> prepared this status report on the work conducted during the third quarter 1993 at the <br /> subject site (shown on Plate 1) Work included groundwater monitoring <br /> BACKGROUND <br /> According to information supplied by ARCO, there are two 12,000-gallon gasoline-storage <br /> tanks and one 10,000-gallon gasoline-storage tank at the site In August 1990, RESNA <br /> drilled seven soil borings around the underground storage tanks and a proposed new tank <br /> cavity to evaluate soil for hydrocarbons (Applied GeoSystems, October 3 1990) Residual <br /> hydrocarbons were analytically identified in soil at low concentrations in borings B-3 through <br /> B-6 <br /> RESNA was onsite November 18 through 21, 1992, to observe drilling of six soil borings and <br /> construction of four groundwater monitoring wells. Residual hydrocarbons were not <br /> identified in soil borings B-8 through B-13 The approximate locations of the monitoring <br /> wells and other facilities are shown on Plate 2 Water samples were collected from the wells <br /> on December 16, 1992, results of laboratory analyses indicated dissolved gasoline <br /> hydrocarbons were not detected in the samples (RESNA, April 17, 1993, Report No 30055- <br /> 6) <br /> 0915kchr <br /> 30055-6 <br />