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UNDERGROUND STORAGE TANK CLOSURE REPORT <br /> 1605 South B Oorado Street Stockton California <br /> r <br /> The samples were submitted, under chain-of-custody, to Pace Incorporated (Pace) of <br /> Novato, California, a state-certified analytical laboratory The samples from the UST basin <br /> and product piping trenches were analyzed for <br /> • TPH, as gasoline, by EPA Method 8015, <br /> • BTEX by EPA Method 8020, <br /> EDB by AB 1803 and <br /> • Total lead by EPA Method 7421 <br />' The analytical results are summarized in Table 2 The laboratory reports and chain-of- <br /> custody form are included in Appendix D Concentrations of TPH, as gasoline, and <br /> benzene in soil, reported in Table 2, are also indicated on Figure 3 <br />' Laboratory analytical results indicated concentrations of TPH, as gasolin , from below the <br /> detection limit (BDL) to 5,300 parts- er-million (ppm), along the northern end of the former <br /> UST basin, with etectable benzene concentrations Concentrations of TPH, as <br /> gasoline, along the soutb-eco-endof TF31ormer UST basin ranged from BDL to 4,800 ppm <br /> . <br /> withjaenzgnp jaagin�g from 0 027 to 11 0 ppm Former product line trench samples <br />'i ranged from BDL to 160 ppm or , as gasoline, and BDL for benzene New product <br /> line trench samples ranged from BDL to 28 ppm for TPH, as gasoline, and BDL for <br /> benzene <br />' 91-044A TCR 4- <br /> 1 <br />