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y� ci E <br /> J. }j. Kt_EINFELDER & ASSQCI 7'E5 ' <br /> File No. S-1773-9/8 <br /> March 7, 1985 <br /> Page Two <br /> 1 <br /> Gasoline Content Tests were performed by Canonie Engineers of Stockton on <br /> the soil samples obtained from approximately 15 feet in the boring adjacent to <br /> theit and at ` <br /> p approximately 17 and 19 feet in the boning in the pit.' The test ' <br /> results indicate gas contents of less than 1.0 part per million for each sample <br /> which is the minimum detection level for the test. j Clean-up standard for hydro- } <br /> carbons is determined for each individual site by DOHS. Their criteria depends <br /> primarily on the soil and groundwater conditions and the potential for, con- <br /> taminating a usable groundwater supply. The test results indicate that no <br /> significant concentration of gas has occured at the; location explored adjacent <br /> to the pit and below approximately 17 feet in the pit. : However, due'! to the: fact f <br /> that gasoline was observed during removal of the tank .and a strong gas odor' was <br /> detected in a sample obtained at 13 feet in the pit, it appears that a gasoline <br /> !� concentration is present locally in the soils present 4 at the bottom of the pit. E <br /> i However, it appears that the lack of groundwater and cemented silt and clay <br /> layer encountered at approximately 18 feet has reduced the horizontal and ver- <br /> tical extent that' the contamination has spread. kk <br /> EE A <br /> If you have any questions or need additional information, please.contact <br /> US. <br /> Respectfully ,submitted, <br /> J. H. KL FELDER & ASSOCIATESZ,le-4 f <br /> /i E <br /> Ron Heinzen,' C. E. } <br /> S R D:rsd <br /> cc: County Health Department r <br /> a <br /> .. _ l <br />