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0 Page 1 of 7 Table 5 _ Groundwater Elevation and Analytical Data - Former ARCO Service Station#4932 16 E Harding Way Stockton CA Well Depth Groundwater LPH Groundwater _ Ethyl- Xylenes MtBE MtBE Well Date Elevation to Water Elevation Thickness Elevation TPHg Benzene Toluene benzene (total) 8020 (8020/8260) DO }Number Sampled (ft MSL) (ft TOC) (ft MSL) (ft) _Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mgILj j MW-1 09105/00 P 1241 2713 -1472 000 — 1 470 128 732 512 254 268 — — 11/02/00 P 2776 -1535 000 -063 1 040 138 680 188 101 386 280 30 03105/01 P 2713 -1472 000 063 834 125 550 205 127 379 376 39 05/08/01 P 2675 -1434 0 00 038 600 781 247 172 854 954 1000 057 07/20/01 P 2811 -1570 000 -1 36 <500 <50 <5 0 <5 0 <50 750 990 — 10/22/01 P 2996 -1755 0 00 -1 85 650 50 21 16 120 1700 1600 1 01 01/15/02 P 2943 -1702 000 053 2 700 170 32 110 600 1200 1100 1 60 04/11/02 P 2865 -1624 000 078 1 300 130 54 68 200 850 510 30 07/12/02 P 2961 -1720 000 -096 9 300 290 30 290 1,200 5 100 4700 24 11/20/02 P 3210 -1969 000 -249 1 600 `" 31 <5 0 91 12 1 400 1600 002 01/30/03 — — — — -- Well unable to be sampled located in oonstruction area 04/28/03 — — — — — Well unable to be sampled connected to remedial system 07129103* P 3174 -1933 000 16,000 s 430 1200 540 1 800 2,200 — 10/17/03 P 3298 -2057 000 -- 1 100 <50 <50 <5 0 <50 2 900 01/13/04 P 3302 -2061 Goo -004 220 <50 <5 0 <5 0 <50 — 430 — MW-2 09/05/00 P 1311 2760 -1449 000 — 1 330 394 1 94 343 104 1420 — — 11/02/00 P 2829 -1518 000 -069 10 700 169 <25 0 1 930 230 4020 3 900 26 03/05/01 P 2764 -1453 000 065 7 750 106 176 1 580 579 12000 2 860 36 05/08/01 P 2726 -1415 000 038 8 750 116 154 1,900 923 3070 2 660 071 07/20/01 P 2856 1545 000 -130 <5 000 <50 <50 870 <50 1900 1 900 — 10/22/01 P 3045 -1734 000 -1 89 1 500 11 89 170 10 1700 1 600 034 01/15/02 P 2990 -1679 000 055 2 100 18 <5 0 350 34 1400 1200 22 04/11/02 P 2907 -1596 000 083 1 700 24 <5 0 270 13 1000 590 33 07/12/02 P 3005 -1694 000 -098 1 200 10 <10 150 <10 1000 720 25 11120!02 P 3254 -1943 000 -249 1 000 91 29 27 <2 5 920 1 000 020 01130!03 — — — — — Well unable to be sampled located in construction area 04/28/03 -- -- — — Well unable to be sampled connected to remedial system 07129!03` P 3198 -1887 000 — 990 s 96 <5 0 60 51 — 560 — 10/17/03 P 3315 -2004 000 — 760 <2 5 200 10 510 -- 850 — 01/13/04 P 3316 -2005 000 -001 290 <5 0 <5 0 <5 0 <50 -- 430 — MW-3 09/05/00 P 1170 2713 -1543 000 — 499 294 <0 50 <0 50 155 562 5 62' — 11102/00 P 2641 -1471 000 072 116 655 <0 500 <0 500 142 <2 5 29 17 03/05/01 P 2621 -1451 000 020 799 646 <0 500 <0 500 0 653 <2 5 264 38 05/08/01 P 2583 -1413 000 038 <50 <0 500 <0 500 <0 500 <0 500 363 398 048 07/20/01 P 2724 -1554 000 -141 <50 <0 50 <0 50 <0 50 <0 50 77 22 — 10/22101 P 2910 -1740 000 -186 250 95 <0 50 <0 50 <0 50 29 <2 0 098 01/15/02 P 2852 -1682 000 058 1600 74 11 <5 0 76 180 10 40 04/11/02 P 2765 -1595 000 087 <50 22 <0 50 <0 50 <0 50 47 20 35 07/12/02 P 2872 -1702 000 -107 240 87 1 3 072 1 0 140 12 33 11/20/02 P 31 17 -1947 000 -245 610 56 54 50 58 660 14 002 Project/ARCO/4932/Reports/Tablestgwtabfes4932-1 Q04