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�ge2of4 = 1 Table 1 ' Groundwater Elevation and Analytleal Oats ARCO Service Station 5595 6100N Highway 99 Stockton CA Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MTBE Well Date Elevation to Water Elevaton Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO Number Sampled ft,MSL) ft,TOC (ft MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) ppb (ppb) (ppb) (rng1L) MW 4 6/16/2000 NP 3377 5656 2279 -- 8 910 2 310 <0 50 839 1 520 3 680 3200 9/19/2000 NP 5924 2547 -268 18 900 2 240 <20 0 693 2 230 2,240 2 510 04 11/2/2000 P 58.59 2482 065 9,230 1 740 <50 0 154 951 1990 2,200 17 315/2001 P 5917 2540 058 5,250 738 <20 0 335 <20 0 1 870 1 760 4 2 518/2001 P 5984 2607 0 67 2 890 875 <20 0 344 <20 0 2 350 2 140 050 811/2001 P 8183 28 D6 199 750 19 <2 5 66 <25 640 1 400 000 10123/2D01 —-- --Dry Well - -— 2/1/2002 P 6158 2781 <500 <5 0 <5 0 <5 0 <50 770 690 028 4/11/2002 P 6214 2B 37 056 280' 17 <0 50 <0 50 <0 60 54 670 0 71 7/16,17102 P 6251 2874 037 —--Insuftipeni Amount of Water to Sample Well -— 22 10/212002 P 6265 2888 -014 - --Insufficient Amount of Water to Sample Well — 1/1712003 NP 6278 2901 013 - Insufficient Amount of Water to Sample Well--- 4f312003 P Dry Well - - - -- MW 5 8/112001 P 3225 6052 -2827 <50 <0 50 <0 50 <0 50 <0 50 <2 5 26 3 51 10/23/2001 P 61158 2961 134 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 098 211/2002 P 6093 28 68 093 <50 <0 50 0 50 <0 50 <0 50 <2 5 <0 50 089 4/11/2002 P -- - - ------ » Not Accessible -— --- — - 711612002 P 6228 3003 -- <50 <0 50 <0 50 <0 50 <0 50 <2 5 12 32 101212002 P 0482 3257 2 54 <50 <0 50 <0 50 <0 50 <0 50 070 010 1117/2003 P 6360 3135 122 <50 <0 50 <0 50 <0 50 <0 50 <2 5 085 1 35 4M2003 P 6301 -3076 059 <50 <0 50 <0 50 <0 50 <0 50 - 12 114 MW-6 8/1/2001 P 3020 5860 2840 -- <50 <0 50 <0 50 <0 50 <0 50 <25 <2 0 3 64 10(2312001 P 59 77 2957 1 17 <50 <0 50 <0 50 <0 50 <0 50 <25 <1 0 162 211/2002 P 58 38 2818 1 39 <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 094 4/11/2002 P 5844 2824 006 <50 <0 50 065 <0 50 c0 50 <25 <0 50 259 7/16/2002 P 6023 3003 1 79 <50 087 30 <0 50 18 46 15 1002002 P 6290 -92 70 267 <50 <0 50 <0 50 <0 50 <0 50 <0 50 106 1/1712003 P 6092 -3072 198 <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 198 41312003 P 6066 -3046 0.26 <50 <0 50 <0 50 <0 50 <0 50 - <0 50 175 MW 7 8/1/2001 P 3252 6057 28 05 -- <50 <0 50 <0 50 <0 50 <0 50 61 94 107 10/23/2001 P 61 94 2942 -137 <50 <0 50 <0 50 <0 50 -050 110 100 023 2/1/2002 P 6104 2852 090 <50 <0 50 <0 50 <0 50 4 50 100 85 015 4111/2002 P 6007 28 35 017 <50 <0 50 1 3 <0 50 089 58 56 092 7116 17102 P 62 42 2990 155 57' <0 50 1 8 <0 50 19 96 87 30 1012/2002 P 6495 3243 253 <50 <0 50 <0 50 <0 50 <0 50 <2 5 130 014 1/17/2003 P 6383 3131 1 12 68(C) <0 50 <0 50 <0 50 <0 50 75 82 078 402003 P 63.37 40 85 OA8 <100 <1 0 <1 0 <1 0 <1 0 - 78 110 MW-8 7/16/2002 P 3310 8327 3017 <50 <0 50 081 <0 50 <0 50 18 15 - 1002002 P 6609 3299 2 82 <50 <0 50 <0 50 <0 50 <0 50 <2 5 38 085 1/17/2003 P 6466 3156 143 <50 <0 50 <0 50 <0 50 <0 50 2 7 26 169 4!312003 P 6412 3102 054 <50 <0 50 <0 50 <0 50 <0 50 - 46 168 ProfectsLAR CO15951ReportslTableslgwtables595