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M MORAND UM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD - CENTRAL VALLEY REGION <br /> 3443 Routier Road Phone: (916) 361-5600 <br /> Sacramento, CA 95827-3098 ATSS: 8-495-5600 <br /> TO: Antonia Vorster f � <br /> � FROM: Robert Niblack <br /> Senior Engineer Engineering Geologist <br /> DATE: 18 September 1987 SIGNATURE: 014 /Lf <br /> SUBJECT: PORT OF STOCKTON GROUND WATER CONTAMINATION <br /> Ground water contamination in the Port of Stockton (Port) fuel terminal <br /> area is widespread. Contamination of ground water with benzene has been <br /> documented in at least ten specific locations in the terminal area. In <br /> addition there are three major areas where soil contamination with <br /> benzene has been confirmed. Each of these is very likely a source of <br /> ground water contamination. Ground water and soil contamination with <br /> other substances including trichloroethene and PCBs has also been <br /> documented. <br /> In the following paragraphs the known locations of contamination are <br /> described on a site by site basis (see attached map) . Much of the <br /> information used is available in the files of the San Joaquin Local <br /> Health District (SJLHD) , and was attained as a result of underground <br /> tank removals. <br /> The sites are described beginning with the ARCO terminal in the <br /> northeast corner of the terminal complex, then proceeding west along <br /> East Washington Street and south along Navy Drive. <br /> ARCO <br /> A tank fire occurred here on 2 February 1981. According to information <br /> on file at the Stockton Fire Department, 431 barrels of fuel overflowed <br /> from tank number 2 during delivery from the Southern Pacific Pipeline. <br /> Tank number 2 had a capacity of 7600 barrels. A fire which followed the <br /> overflow destroyed the tank. Estimates of the amount of fuel burned <br /> during the fire, or recovered afterwards may be available from ARCO, but <br /> are not on file with the Fire Department. The extent of soil and ground <br /> water contamination due to this incident has not been determined. <br /> ABANDONED FUEL PIPELINES <br /> During construction of a water line on West Washington Street, Cal Water <br /> Service excavated a leaking pipeline. Soil in the excavation was <br /> saturated with fuel according to the city inspector on the job site. <br /> Abandoned fuel pipelines to Time Oil and Tesoro Petroleum were observed <br /> on recent inspections at these sites. The extent of the old fuel <br /> pipeline network at. the Port is unknown. Some of the lines are leaking. <br /> According to a representative of Trans-California Terminal, a 12-inch <br />