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�3afSg T Table 1 n Groundwater Elevation and Analytical Data ARCO Service Station#595 5100 N Highway 99 Stockton CA ` Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MtBE Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) 00 Number Sampled (ft MSL) (ft,TOC) (ft,MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mglL) MVV-6 8!1!2001 P 3020 5860 -2840 — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 3 64 10/23/2001 P 59 77 -29 57 -1 17 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 162 2/1/2002 P 5838 2818 139 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 094 411112002 P 58 44 2824 0 06 <50 <0 50 0 65 <0 50 <0 50 <2 5 <0 50 2 59 7/16/2002 P 6023 -3003 179 <50 0 87 3 0 <0 50 1 8 4 6 1 5 — 10212002 P 6290 -3270 -267 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 1 06 111712003 P 6092 -30 72 198 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 1 98 41312003 P 60 66 3046 0 26 <60 <0 50 <0 50 <0 50 <0 50 — <0 50 1 75 7!2212003 P 6289 -3269 223 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — 1011 2!2003 P 6475 34 5$ -186 <50(b) <0 50(b) 0 56(B) <0 50(b) <0 50(b) — <0 50(b) 180 1/812004 P 63 28 -3308 147 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — MW-7 81V2001 P 32 52 5057 2805 — <50 <0 50 <0 50 <0 50 <0 50 61 94 107 10/2312001 P 6194 2942 137 <50 <0 50 <0 50 <0 50 <0 50 110 100 023 211 t2002 P 61 04 -2852 0 90 <50 <0 50 <0 50 <0 50 <0 50 100 85 015 4!1112002 P 6087 -2835 017 <50 <0 50 13 <0 50 0 89 58 56 092 7116 17102 P 6242 -2990 -155 571 <0 50 1 8 <0 50 19 96 87 3 0 101212002 P 6495 3243 -253 <50 <0 50 <0 50 <0 50 <0 50 <2 5 130 014 111712003 P 6383 3131 1 12 68(c) <0 50 <0 50 <0 50 <0 50 75 82 078 4!312003 P 6337 3085 046 <190 <1 0 <10 <10 <10 — 78 110 7/22/2003 P 64 86 32 34 149 <100 <1 0 <1 0 <1 0 <1 0 — 99 — 10l1 22003 P 6674 -3422 -188 <1 200(b d) <12(b) <12(b) <12(b) <12(b) — 99(b) 031 1/812004 P 6562 3310 112 110 <1 0 <1 0 <1 0 <1 0 — 76 — MW-8 7!162002 P 3310 6327 -3017 — <50 <0$0 081 <0 50 <0 50 18 15 — 10212002 P 6609 32 99 282 <50 <0 50 <0 50 <0 50 <0 50 <2 5 3 8 0 65 111712003 P 64 66 -3156 143 <50 <0 50 <0 50 <0 50 <0 50 2 7 2 6 169 4132003 P 64 12 -3102 0 54 <50 <0 50 <0 50 <0 50 <0 50 — 4 6 168 7/2212003 P 6607 -3297 -195 <50 <0 50 <0 50 <0 50 <0 50 — 6 9 — 7011 22003 P 6796 -34 86 -1 89 <50(b) <0 50(b) 1 4(b) <0 50(b} 0 76(b) — 2 7(b) 1 51 11812004 P 66 41 -33 31 156 <50 <0 50 <0 50 <0 50 <0 50 — 2 4 — MW-9 7/162002 P 3372 6355 -2983 — <50 <0 50 <0$0 <0 50 <0 50 X15 093 34 10/22002 P 66 17 -3245 -262 <50 <0 50 <0 50 <0 50 <0 50 — 055 010 1!172003 P 65 01 -3129 116 <50 <0 50 <0 50 <0 50 <0 50 <2 5 061 123 4!32003 P 6465 30 83 046 <50 <0 50 <0 50 <0 50 <0 50 — 057 090 72212003 P 6610 32 38 155 <50 <0 50 <0 50 <0 50 <0 50 — 0 62 — 10/12003 NP Unable to Access Car Parked Over Well 11712004 NP Unable to Access,Car Parked Over Well MW 10 71162002 P 3127 61 16 -2989 — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 2 8 10722002 P 6360 -32 33 -244 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 010 1!172003 P 6270 -3143 0 90 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 1 75 4!312003 P 62 20 30 93 0 50 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 0 97 <0 50 <0 50 <0 50 <0 50 72212003 P 6349 322.2 129 <50 <0 50 — — 1011 22003 P 6512 3385 163 <50(b) <0 50(b) 12(b) <0 50(b) 0 82(b) — <0 50(b) 122 1!812004 P 6433 33 06 079 <50(e) <0 50(e) <0 50(e) <0 50(e) <0 50(a) — <0 50(e) -- 11ProlectstARCOL595%Reportsl7ables11Q04gwtables595 As