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�ao1s Table i Groundwater Elevation and Analytical Data ARCO Service Station#595 6100N Hlghway99 S1OCk1on CA Well Depth Groundwater Groundwater Ethyl Xylenes MISE MtBE Wen Date Elevation to Water Elevatlon Elevation TPHg Benzene Toluene benzene (total) (EPA8020) (EPA8260) DO Number Sampled R MSL) (ft TOM (ft,MSL) Change(11) {Ppb) (Ppb) (ppb) (Ppb) (ppb) (ppb) (ppb) i-9,L) <50 <0 50 <0 50 <0 50 <0 50 <25 <0 50 2 8 MW 10 7H 612002 P 3127 61 16 29 89 <0 SQ <0 50 <2 5 <0 50 0 SO 1012/2002 P 6360 32 33 2 44 <50 <0 50 <0 50 1/178003 P 6270 3143 0 90 <50 <0 50 <O 50 <0 50 <0 50 <2 5 <0 50 175 4!312003 P 6220 3093 0 50 <50 <0 50 <0 50 -050 -050 — <0 50 097 7=003 P 6349 3222 129 <50 <0 50 <0 50 <0 50 <0 50 <0 50 1011 212003 P 6512 3385 163 <50(b) <0 50(b) 12(b) <0 50(b) D 82(b) <0 50(b) 122 1/8/2004 P 6433 3306 079 <50(e) <0 50(e) <0 50(e) <0 50(e) <0 50(e) — <0 50(e) — 4/212004 P 6411 3284 022 <50 <0 50 <0 50 <0 50 -050 Y <0 50 — 71112004 P 66 45 3518 2 34 <50 <0 50 <0 50 <0 50 <0 50 <0 50 DMW 1 7116 17102 P 34 30 6443 3013 -- <50 <0 50 2 6 051 2 8 3 8 2 3 27 i 0!2!2002 P 66 81 3251 -238 <50 <0 50 <O 50 <0 50 <0 50 <2 5 2 7 028 1117!2003 P 6570 3140 1 11 <50 <0 50 <0 50 -050 <0 50 4 1 4 8 147 4148003 P 6533 -3103 037 <50 <0 50 <0 50 <0 50 <0 50 5 0 153 7/22!2003 P 6682 32 52 149 <50 <0 50 <0 50 <0 50 <0 50 — 4 6 — 1011 212003 P 6833 3403 151 <50 tb) <0 50(b) <0 50(b) <0 50(b) <0 50(b) — 24(b) 069 1/812004 P 67 44 3314 089 58(e) <0 50(e) <0 50(e) <0 50(e) <0 50(e) — 39{e) — 488004 P 67 24 -3294 020 <50 <0 50 <0 50 <0 50 <0 50 27 7/2/2004 P 70 06 35 7fi 282 <50 14 063 <0 50 091 DMW 2 7116 17102 P 3362 7315 -3953 — <50 <0 50 2 2 <0 50 2 8 17 12 2 5 10!212002 P 66 07 3245 708 <50 <0 50 <0 50 <O 50 <0 50 -- 9 4 026 1 f 1712003 P 65 90 3228 0 17 <50 <0 50 <0 50 <0 50 <0 50 6 6 7 1 189 414/2003 P 64 61 .3099 129 <50 <Q 50 <0 50 <0 50 <0 50 — 9 8 1 14 7/2212003 P 6498 3136 -037 590 <0 50 <0 50 <0 50 <0 50 — 8 5 — loll 212003 P 6791 34 29 293 <50(b) <0 50(b) <0 50(b) <0 50(b) <0 50(b) — 6 4(b) 083 118J20O4 P 6682 3320 109 <50 <0 50 <0 50 -050 <0 50 11 — 4/2/2004 P 6644 3282 0 38 <50 <O 50 <0 50 <0 50 <0 50 — 16 — 7118004 P 6936 -3564 2 82 <50 <0 50 <0 50 <0 50 <0 50 — 19 DMW 3 7!168002 P 3271 6279 3008 -- <50 <0 50 14 <0 50 13 73 53 — 1(VM002 P 65 34 3263 255 <50 <0 50 <O 50 <0 5D <0 50 <5 74 004 III 712 0 03 P 6415 3144 119 110 <10 <10 <10 <10 130 170 132 4148003 P 6368 -3097 047 <500 <50 <5 0 <5D <5 0 — 84 1 26 7/2212003 P 65 27 32 56 159 <250 <2 5 <2 5 <2 5 <2 5 — 78 1011 2!2003 P 6600 3419 163 <1 200(b d) <12(b) <12(b) <12(b) <12(b) — 86(b) 024 11812004 P 6592 3321 098 120 <1 0 <1 0 <1 0 <1 0 -- 89 — 4880D4 P 6561 32 90 0 31 310 425 <25 <2 5 <2 5 80 7128004 P 6861 -3590 -300 <250 <2 5 <2 5 <2 5 <2 5 86 r I I 1 11ProjectslARCOl5951ReportslTablesUO04gwtables595 As