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w• <br /> COUNTY OF SAN JOAQU I N THOMAS R.FLINN <br /> W. < DEPARTMENT OF PUBLIC WORKS DEPUTY DIRECTOR <br /> P.O.BOX 1810-1810 E.HAZELTON AVENUE MANUEL LOPEZ <br /> •'• STOCKTON.CALIFORNIA 95201 DEPUTY DIRECTOR <br /> (t• 'p (209)468-3000 STEVEN WINKLER <br /> ��%j11a�la� FAX(209)468-2999 DEPUTY DIRECTOR <br /> HENRY M.HIRATA <br /> DIRECTOR <br /> November 6, 1997 <br /> MFMQBg �I � IZM <br /> TO: Harlin Knoll, SREHS <br /> Public Health Services <br /> Environmental Health Division <br /> FROM: Gabriel Karam GSM <br /> Senior Solid Waste Engineer <br /> SUBJECT: DIESEL TANK REMOVAL - SOIL TEST RESULTS <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> This is regarding our telephone conversation of October 27 and <br /> your request for information on the diesel tank removal project <br /> at the Corral Hollow Sanitary Landfill . The following is <br /> background information regarding the project. A summary table of <br /> all test results and maps corresponding to soil tests from <br /> various dates are attached. <br /> The San Joaquin County Department of Public Works removed the <br /> site's underground diesel storage tank on February 16, 1996. <br /> Soil tests taken after the tank's removal indicated diesel fuel <br /> contamination at the tank and fuel dispenser sites. <br /> A plan for determining the extent of contamination and corrective <br /> action was submitted to the San Joaquin County Environmental <br /> Health Division (EHD) on May 1, 1996. The plan was subsequently <br /> approved by the EHD, and excavation of the contaminated soil was <br /> performed on June 26, 1996. Approximately 15 and 86 cubic yards <br /> of material were removed from the dispenser and tank areas, <br /> respectively. Soil samples were taken after the areas were <br /> excavated. The analytical data is shown in the attached summary <br /> table. Only the sample taken from the tank bottom and the north <br /> sidewall showed contamination after excavation. These areas were <br /> overexcavated again to remove the remaining contamination. The <br /> metal equipment maintenance shed was removed so the excavation <br /> could proceed more to the north. Samples were taken again in <br />