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Kennedy/Jenks/Chilton <br /> Attachment G to Kennedy/Jenks/Chilton's <br /> letter to Mr. 'Charles Whitworth <br /> —� dated 14 July 1989 <br /> Page 1 <br /> LEACHING POTENTIAL ANALYSIS <br /> A leaching potential analysis (see following page) was conducted on conditions <br /> at the site as presented in the decision tree flow chart int he California <br /> Leaching Underground Field (LUFT) Manual dated 5 April 1989. This analysis <br /> was conducted to obtain an estimate of the concentrations of TPH as gasoline <br /> and diesel which could be left in soils at the site. The analysis accounts <br /> for soil characteristics, hydrology, precipitation, and characteristics of the <br /> chemicals involved. <br /> According to the analysis, 10 ppm of gasoline and 100 ppm of diesel should be <br /> allowable concentrations of hydrocarbons in soils at the Cal-Farm Stockton <br /> { site. These concentrations in the site soils should not pose a threat to <br /> groundwater. Concentrations of allowable gasoline are lower than <br /> concentrations allowable for diesel because benzene is a constituent of <br /> gasoline. Benzene is a concern to groundwater because of its relatively high <br /> solubility and the fact that it is a carcinogen. <br /> s <br /> i <br /> i <br />