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0 PagOof 6 Table 1: Historical Soil Sample Analytical Results Chevron Service Station#9-4275 2905 West Benjamin Holt Drive Stockton,California Depth of TPH as Total TPH as Sample Sample Gasoline Benzene Toluene Ethylbenzene Xylene MTBE Lead EDB Diesel Name/1 D Date (feet) (mg/kg) (a) (mg/kg) (a) (mglkg) (a) (mg/kg)(a) (mg/kg)(a) (mg/kg) (a) (mg/kg) (gggN),(b) (fg) (a) SB-2 20-Jun-94 10 120 0 053 018 084 2 7 --- --- --- --- 15 2,600 11 90 67 360 --- -- --- _-- 20 22 0 570 0180 0 330 0 650 --- -- --- --- SB-3 20-Jun-94 10 ND(<1) ND(<0 005) ND(<0 005) 0 014 0 026 --- 15 40 019 042 069 29 --- --- --- --- 17 300 15 2 2 5 6 26 --- --- --- --- SB-4 20-Jun-94 10 ND(<1) ND(<0 005) ND(<0 005) ND(<0 005) ND(<0 005) --- --- --- -- 15 ND(<1) ND(<0 045) ND(<0 005) ND(<0 005) ND(<0 005) --- -- --- --- 17 14 0 053 013 011 0 099 --- --- --- --- Piping Samples: Pi 18-Nov-96 3 81 0 011 0 022 00091 0 030 0 029 6 9 --- 2 4 P2 18-Nov-96 3 5 3 9 ND(<0 0050) 0 013 00052 0 034 011 7 3 --- 15 P3 18-Nov-96 3 ND(<l 0) ND(<4 0050) ND(<0 0050) ND(<4 0050) ND(<4 0050) ND(<o 025) 70 --- 12 P4 18-Nov-96 3 5 ND(<5 0) 029 ND(<0 025) ND(<o 025) 0 026 14 52 --- 15 P5 18-Nov-96 3 5 ND(<l 0) ND(<0 0050) ND(<0 0050) ND(<0 0050) ND(<0 0050) 3 5 51 --- ND(<l 0) P6 18-Nov-96 3 2 3 0 096 0 016 0 060 013 15 65 --- 10 P7 18-Nov-96 3 5 ND(<l 0) ND(<0 0050) ND(<0 0050) ND(<0 0050) ND(<4 0050) ND(<0 025) 72 --- ND(<10) P8 18-Nov-96 4 ND(<l 0) ND(<0 0050) ND(<0 0050) ND(<0 0050) ND(<0 0050) ND(<0 025) 51 --- 1.1 P9 18-Nov-96 4 ND(<l 0) ND(<0 0050) ND(<0 0050) ND(<0 0050) 00050 ND(<0 025) 51 --- ND(<10) P10 18-Nov-96 35 ND(<l 0) ND(<0 0050) 00073 ND(<0 0050) 0 025 ND(<0 025) 6 3 --- 40 Pi l 18-Nov-96 4 ND(<10) ND(<0 0050) ND(<0 0050) ND(<0 0050) ND(<o 0050) 0 089 8 3 --- 10 P12 18-Nov-96 4 2 0 ND(<0 0050) 0 008 ND(<0 0054) 054 071 69 --- 10 Project No RC0309 010 I