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�305 -" Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#595 6100 N Highway 99 Stockton CA Well Depth Groundwater Groundwater Ethyl Xylenes ME MtSE Well Date Elevation to Water Elevation Elevahon TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO Number Sampled (ft MSL) (ft TOC) (ft,MSL) Change(k) (ppb) (Ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (MQ&) MW-6 811!2001 P 3020 58 60 2840 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 364 10/23/2001 P 5977 2957 -1 17 <50 <0 50 <0 50 4 50 <0 SQ <2 5 <1 0 162 2/1/2002 P 58 38 2818 1 39 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 094 4/11/2002 P 58 44 2824 0 06 <50 <0 50 065 <0 50 <0 50 <2 5 <0 50 259 711612042 P 6023 3003 1 79 <50 0 87 30 <0 50 1 8 4 6 15 101212002 P 62 90 3270 2 67 <50 <0 50 <0 50 <0 50 <0 50 <0 50 1 06 1/17/2003 P 60 92 30 72 198 <50 <0 50 <0 50 <0 50 <0 54 <2 5 <0 50 198 4/3/2003 P 60 66 3046 026 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 175 7!2212003 P 6289 32 69 223 <50 <0 50 <0 50 <0 50 <0 50 <0 50 — IW1,2=3 P 64 75 -34.55 1186 <50(b) <0 50(b) 0 56(B) <0.50(b) <0.50(b) — <0 50(b) 180 MW 7 8/1/2001 P 3252 60 57 2805 — <50 <0 50 <0 50 <0 50 <0 50 61 94 107 1012312001 P 61 94 2942 137 <50 <0 50 <0 50 <0 50 <0 50 11 o 100 023 2J1/2002 P 61 04 28 52 090 <50 <0 50 <0 50 <0 50 <0 50 100 85 015 411112002 P 6087 2835 017 <50 <0 50 13 <0 50 0 89 58 56 092 7/1617/02 P 6242 2990 155 57' <0 50 1 8 <0 50 1 9 96 87 3 0 10/2/2002 P 6495 -3243 2 53 <50 <0 50 <0 50 <0 50 <0 50 <25 130 014 1/17/2003 P 6383 -3131 112 68(c) <0 50 <0 50 <0 50 <0 50 75 82 0 78 4/312003 P 6337 3085 046 <100 <1 0 <1 0 <1 0 <1 0 78 1 10 7/2212003 P 6486 3234 149 <100 <1 0 <1 0 <1 0 <1 0 99 10/1,2!2003 P 6674 34 22 -188 <1,200(b,d) <12(b) <12(b) <12(b) <12(b) -- 99(b) 031 MW 8 7/16/2002 P 3310 6327 3017 <50 <0 50 0 81 <0 50 <0 50 18 15 10712002 P 6609 3299 282 <50 <0 50 <0 50 <0 50 <0 50 <2 5 3 8 0 85 1/17/2003 P 6466 3156 143 <50 <0 50 <0 50 <0 50 <0 50 27 26 1 69 4/3/2003 P 6412 3102 0 54 <50 <0 50 <0 50 <0 50 <0 50 46 168 7/22/2003 P 6607 32 97 195 <50 <0 50 <0 50 <0 50 <0 50 69 1011,212003 P 6796 -34 86 -189 <50(b) <0 50(b) 14(b) <0 50(b) 0 76(b) — 2 7(b) 1.51 MW 9 7/16/2002 P 3372 6355 -29 83 — <50 <0 50 <0 50 <0 50 <0 50 <2 5 093 34 10/2/2002 P 6617 -3245 2 62 <50 <0 50 <0 50 <0 50 <0 50 — 055 0 10 1/17120M P 65 01 3129 116 <50 <0 50 <0 50 <0 50 <0 50 <25 061 123 4!312003 P 6455 3083 046 <50 <0 50 <0 50 <0 50 <0 50 057 090 7/22/2003 P 6610 3238 -155 <50 <0 50 <0 50 <0 50 <0 50 062 1W11/2003 NP Unable to Access,Car Parked Over Well MW 10 7/16/2002 P 3127 6116 2989 <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 28 1012/2002 P 6360 3233 2 44 <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 010 1/17/2003 P 6270 3143 0 90 <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 175 4/312003 P 6220 3093 0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 0 97 7/22/20M P 6349 3222 -1 29 <50 <0 50 <0 50 <0 50 <0 50 <0 50 — 10/1,2l2003 P 65 12 -33 85 -163 <50(b) <0 50(b) 1 2(b) <0 50(b) 0 82(b) — <0.50(b) 1,22 t IProlectslARCOZ951AeportslTablesWO03gwtables595 xts