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ARCO Products Compy ' <br /> 2000 Alameda de las Pulgas <br /> Mailing Address: Box 5811 <br /> San Mateo, California 94402 <br /> Telephone 415 571 2400 <br /> S4 -1 ' LtxiS✓ <br /> F E B 2 7 1992 <br /> February 24, 1992 ENVIRONMEIV -�i <br /> PERMIT/Sci, v �� <br /> Mr. Homer Vaughn, P.E. <br /> Department of Health Services <br /> Stockton District <br /> Office of Drinking Water <br /> 31 East Channel Street, Room 270 <br /> Stockton, California 95202 <br /> Subject: ARCO Service Station #2133, 2908 Benjamin Holt Drive, <br /> Stockton, California <br /> Dear Mr. Vaughn: <br /> This letter is in response to your letter (attached) dated January 30, <br /> 1992, regarding sampling the Stockton Municipal Wells 2 and 10. In your <br /> letter you state that the San Joaquin County Environmental Health <br /> Department (County), had informed you that the underground storage tanks <br /> (UST's) were removed at the ARCO service station as well as the adjacent <br /> Chevron se,,vice station because of a failed pressure test. The UST's at <br /> the ARCO service station were replaced in 1984 because of a broken leak <br /> detector, not a failed pressure test. ARCO does not know the history of <br /> the Chevron's UST's and do not know if, when or why their UST's were <br /> removed. <br /> Your letter also states that the County informed you that soil saturated <br /> with gasoline exists at both sites. During the 1984 UST's replacement at <br /> ARCO, the soil affected by gasoline hydrocarbons in the UST's area was <br /> removed. There is no current information to conclude that soil beneath <br /> the ARCO site is saturated with gasoline hydrocarbons. This statement is <br /> based on the results of various sampling activities at the ARCO site. <br /> ARCO does not know the condition of soil beneath the Chevron site. <br /> Shallow groundwater beneath both the ARCO and Chevron sites has been <br /> impacted by gasoline hydrocarbons. A groundwater extraction and <br /> remediation system is operating at the ARCO service station and <br /> preventing the migration of hydrocarbon-impacted groundwater towards <br /> the two municipal wells. <br /> APPC-7025-D <br /> :PCC P­octs Como—is a Division of Ane ticR¢hlieldComoanv 9-88) <br />