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Mr Sagaser also conveyed that the two houses on Tracy Boulevard, south of Larch <br /> Road, are also connected to the public water supply <br /> On October 29, 1993, an onsite water supply well was uncovered in the northeast <br />' corner of the site The well had been previously destroyed by cement grouting the <br /> annulus. An onsite inspection by Mr. Harlin Knoll (SJCPHS) indicated that the well <br /> had been satisfactorily destroyed <br />' 2.2 SITE MAP <br /> As shown in Figure 3, several portions of the site were impacted by hydrocarbon <br /> releases The main release occurred on the eastern porton of the station This area <br />' was the site of two former 10,000 gallon gasoline underground storage tanks (USTs), <br />' the former waste oil tank, and an aboveground oil storage area at the rear of the <br /> former service station The depth of hydrocarbon impacts was approximately 10 to <br /> 12 feet below ground surface (bgs) <br /> ' On the west side of the site, the area of the pump islands was also impacted by <br /> hydrocarbons The depth of hydrocarbons in this area was approximately 3 to 6 feet <br /> bgs. <br /> ' The product line, connecting the pump islands to the UST area, was also impacted by <br /> low levels of hydrocarbon contamination The depth of hydrocarbons in this line <br /> ' trench was approximately 3 feet bgs. <br /> ' Maps showing groundwater elevation contours and groundwater gradients are shown <br /> in Mittelhauser's quarterly monitoring and sampling reports for 1992, and the first <br /> ' quarter of 1993 Additional potentiometric surface maps are presented in subsequent <br /> Quarterly Data Reports by MPDS Services (MPDS). Groundwater gradient maps <br /> ' show groundwater flow directions routinely varied by as much as 90 degrees between <br /> 2 /"ittelhauser <br /> 2188 ,�.R11 w 1995 R C O ■ P 0 G A T 1 0 s+ <br />