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C <br />TANK CLOSURE REPORT <br />2320 Et Dorado, Stockton, CA <br />Aegis Project No. 89-049 <br />Page 9 <br />As shown in Table 2 referencing the underground product storage <br />tanks, petroleum hydrocarbons were detected in three of the soil <br />samples. The samples containing detectable levels of petroleum <br />hydrocarbons were taken from 14 and 16 feet below grade at the ends of <br />the tank pit. The "OTP11 series of samples were taken from four sides <br />of the old tank pit at approximately 15 feet below grade. The 11NTP11 <br />series of samples were taken from the walls of the proposed new tank <br />location at 6 and 16 feet below grade. All samples are representative <br />ofnative • <br />Composite samples were submitted to a state -certified laboratory for <br />analysis of TPH as gasoline with BTEX distinction, Ethylene Dibromide, <br />and total lead. The results of the analyses are summarized in Table <br />3. Total lead results for all composite samples were below 10.0 ppm. <br />The certified laboratory reports are contained in Appendix A. <br />Laboratory analysis of composite soil samples from the stock piles <br />indicates that the soil can be hauled to a Class III land fill for <br />disposal (Appendix A). The material is currently to be permitted to <br />West Contra Costa County Landfill. The material will be removed by -a <br />licensed hauler after approval is received from the landfill and <br />SJCHD. <br />Soil samples referencing the product line trenches were submitted to a <br />state -certified . •s • s of low/mediumboiling •• <br />int <br />hydrocarbons (TPH as gasoline) with BTEX distinction by EPA method <br />8015/8020, lead, and halogenated volatile organics by EPA method 1 <br />