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M Mir M Table 1 Groundwater Elevation and Analytical Data ARCO Service Station#4932 16 E Harding Way Stockton California well Depth Groundwater LPH Groundwater Ethyl- Xylenes ME MTBE Well Date Elevation to Water Elevation Thickness Elevation TPHg Benzene Toluene benzene (total) 8020 (8 02 018 2 6 0) DO Number Sampled (ft MSL) (ft TOC) (k MSL) (ft Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) MW 1 09105100 P 1241 27 13 1472 Goo 1 470 128 732 5$2 254 268 11/02/00 P 2776 1535 000 -063 1 040 138 680 188 101 386 280 30 03105101 P 2713 14 72 000 063 634 125 55 0 205 127 379 376 39 i MUM P 2675 14 34 0 00 038 600 781 24 7 172 854 954 1 D00 057 07/20/01 P 2811 1570 0 DO 136 <500 <50 <5 0 <50 <50 750 990 — , 10122!01 P 29 96 1755 0 00 1 85 650 50 21 16 120 1760 1600 101 01/15/02 P 2943 1702 0 00 053 2 700 170 32 110 600 1200 1100 160 04111102 P 28 65 16 24 0 00 0 78 1 300 130 54 68 200 850 510 30 07112/02 P 2961 17 20 0 DD -096 9 300 290 30 290 1200 5 100 47DO 24 11120102 P 3210 1969 000 249 1 600 31 '50 91 12 1 400 16DO 0 02 01/30103 — — — — — Well unable to be sampled located in construction area I 64!26743 — — _ _ Well unable to be sampled connected to remedial system i 07129103 P 3174 1933 000 — 16 000 s 430 1200 540 1 BDO — 2200 — 10/17/03 P 3298 2057 000 -124 1 100 <5 0 <5 0 <50 <5 0 — 2 900 — 01/12104 P 3302 2061 0 DO -004 220 <50 <5 0 -.50 <50 — 430 2 20 04126!04 P 31 26 1885 0 00 176 570 <50 <5 0 <50 <5 0 — 850 — i 07114104 P 32 64 20 23 0 00 138 <5 000 <50 <50 <50 <50 — 4200 — f 1012704 P 34 60 2219 000 196 <2 500 <25 <25 <25 <25 -- 1 700 — 01N 3105 P 35 03 -2262 0110 -043 950 <50 <50 <60 <50 — 1 700 MW 2 09105100 P 1311 2760 1449 000 — 1 330 39 4 1 94 34 3 104 1420 — -- 11/02100 P 2B 29 1518 000 -069 10 700 169 <25 0 1930 230 4020 3 900 26 03105101 P 2764 1453 000 065 7 750 106 176 1 580 579 12000 2 860 3 6 05/08/01 P 2726 1415 000 0 38 8 750 116 154 1900 923 3070 2 660 0 71 ' 07120101 P 2856 1545 0 DO 130 -5000 <50 <50 870 <50 1900 1900 — 10/22101 P 3045 17 34 0 00 189 1 500 11 89 170 10 1700 1 600 0 34 01115/02 P 2990 1679 0 00 0 55 2 1 DO 18 <5 0 350 34 1400 1 2DD 2 2 04111/02 P 29 07 1596 0 06 083 1 700 24 <5 0 270 13 1000 590 33 1 07112!02 P 30 05 16 94 0 0D -098 1200 10 <10 150 <10 1000 720 25 11120102 P 32 54 1943 0 DO 249 1 000 91 2 9 27 <25 920 1 000 020 OM0103 — — — — Well unable to be sampled located in construction area 04128103 — — _ — _ Well unable to be sampled connected to remedial system 0729103 P 3198 1887 000 — 990 s 96 <5 0 60 51 — 560 — 10117103 P 3315 2004 000 117 760 <2 5 20 1D 51 — 850 — 011127D4 P 3316 2005 0 DO -001 290 <5 0 <5 0 <50 <5 0 — 430 230 04/26/04 P 3162 -1851 0 00 154 220 <0 50 <0 50 0 81 59 -- 220 — 07/14/04 P 32 67 1976 0 00 125 <500 <50 <5 0 <50 <5 0 — 300 10127/04 P 3482 21 71 0 00 195 <1 000 <10 <10 <10 <10 — 400 MAWS P 3423 -2112 0 00 059 370 00 <10 <10 <10 — 460 — M W 3 09105M P 11 70 2713 -1543 000 — 499 294 <0 50 <0 50 155 562 562 11/02/00 P 26 41 1471 000 072 116 6 55 <0 500 <0 500 142 <2 5 29 1 7 , 0=5101 P 2621 1451 000 020 799 646 <0 500 <0 5DO 0 653 <2 5 2 64 38 05108101 P 2583 1413 000 0 38 <50 <0 500 <D 500 <0 500 <0 500 363 398 048 07/20/01 P 2724 1554 000 141 <50 <0 50 <0 50 <0 50 <0 50 7 7 22 — 10/22101 P 2910 1740 0 DO 1 86 250 9 5 <0 50 -.050 <0 50 29 <2 0 098 01115/02 P 2852 1682 0 00 058 1600 74 11 <5 0 76 180 1 D 4 0 04111102 P 2765 1595 000 087 <50 2 2 <0 50 <0 50 -050 4 7 2 0 3 5 07112/02 P 2872 1702 0 00 107 240 87 1 3 072 1 0 140 12 35 i f 11Pro1ects%AR=49MTablesYQMR Table511 Q05 gwtable54932 As Page 1 of 7