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PUBLIC 1"otEALTH SERVA",'ES <br /> SAN JOAQUIN COUNTY ' <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H ., Acting Health Officer :., <br /> 304 E.Weber Ave.,Third Hoer 388 Stockton, CA 95201-0388 �44� <br /> 2091468-3420 <br /> MEMORANDUM <br /> TO: LORI CASIAS <br /> FROM: MARGARE'T' LAGORIO <br /> SATE; DECEMBER 16, 1996 <br /> RE: A.G. SPANOS SET CENTER RESPONSIBLE FOR UNAUTHORIZED <br /> RELEASE FROM UST'S AT 5000 SOUTH AIRPORT WAY, STOCKTON <br /> San Joaquiin. County Public Health Services, Environmental Health <br /> Division (PHS/EHD) determined that A.C. Spanos Jet Center was <br /> responsible for the unauthorized release of petroleum <br /> hydrocarbons from four underground storage tanks formerly located <br /> at 5000 South Airport Way, Stockton, for the following reasons. <br /> 1. A.G. Spanos Jet Center was the last operator of the tanks <br /> prior to their removal . All four tanks were empty when. A.C. <br /> Spanos Jet Center ceased operating them. Under the Spanos <br /> Jet Center Lease Agreement, Stockton Service Station <br /> Equipment Company was contracted to pump empty the four <br /> tanks. (See letter from Airport Manager dated 12/16/96) . <br /> 2 . When tanks 1, 2, and 3 were removed on February 28, 1990 it <br /> was obvious to the PHS/EHD inspector on site that the tanks <br /> were in poor condition. In addition, there was fuel odor <br /> and liquid observed by the inspector beneath tank 2 . <br /> 3 . Soil samples were not collected until March 2, 1990, because <br /> there was a cement slab beneath the tanks. Three holes were <br /> drilled through the cement beneath each tank. Soil samples <br /> were Collected beneath the cement slab through each drilled <br /> hole. In addition, soil samples were collected from below <br /> each end of the cement slab. Even though the excavation had <br /> been open for two days the PHS/EHD inspector present at the <br /> site observed odor as well as discoloration to the soil_ <br /> samples, especially the samples collected at the east ends <br /> of the former tank locations. These observations of an <br /> unauthorized release of petroleum hydrocarbons were <br /> confirmed by the lab results of the soil samples collected. <br /> 4 . The soil sample results show varying levels of contamination <br /> directly and laterally beneath each tank, which indicates <br /> that the contamination evidenced is from an unauthorized <br /> release from that tank. <br /> A Division of San joaagtfin County Health Care Services <br />