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Page 1 of 6 Table 1 Groundwater Elevation and Analytical Data ARCO Service Stabon#4932 16 E Harding Way Stockton CA pth 4, Ethyl- Xylenes, MtBE> _ MtBEr f <, " Well_n �De -,- `Groundwater —, s LPH^r' Groundwater- w �- Well Date, Elevation `d to Water <Elevatlon�- ThrGmess Elevation w_TPHg Benzene Toluene l benzene (total)' 8020 - {802018260}7 DO ' '4 Number Sampled W �'{{ft MSL} (ft,TOC) -MSL)- v (ft) Change(ft)^ (ppb} (ppb} (ppb) (ppb) {ppb) - (ppb) (mg1L) MWA 09/05/00 P 1241 2713 -1472 000 — 1 470 128 732 512 254 268 — — 11/02100 P 2776 -1535 000 -063 1 040 138 68 0 188 101 386 280 3 0 03/05101 P 2713 -1472 000 063 834 125 550 205 127 379 376 3 9 05/08/01 P 2675 -1434 000 0 38 600 781 24 7 172 854 954 1000 0 57 07/20/01 P 2811 -1570 000 -1 36 <500 <5 0 <5 0 <5 0 <5 0 750 990 — 10/22/01 P 2996 -1755 000 -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 160 04/11/02 P 2865 -16 24 000 078 1 300 130 5 4 68 200 850 510 3 0 07/12/02 P 2961 -17 20 000 -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 0 02 01/30/03 — — - — — Well unable to be sampled located in construction area 04/28/03 — — — — Well unable to be sampled connected to remedial system 07129103' P 3174 -1933 0 00 — 16,000 s 430 1,200 540 1 800 — 2200 — 10/17/03 P 3298 -2057 0 00 -124 1 100 <50 <5 0 <5 0 <5 0 — 2,900 — 01/12/04 P 3302 -2061 0 00 -004 220 <5 0 <5 0 <50 <5 0 — 430 220 MW-2 09/05/00 P 1311 2760 -1449 000 — 1 330 394 194 343 104 1420 — — 11/02/00 P 2829 -1518 000 -069 10 700 169 <25 0 11930 230 4020 3,900 2 6 03/05/01 P 2764 -1453 000 065 7 750 106 176 1,580 579 12000 2860 3 6 05/08/01 P 2726 -1415 000 038 8 750 116 154 1900 923 3070 2 660 0 71 07/20/01 P 2856 -1545 000 -1 30 <5,000 <50 <50 870 <50 1900 1900 -- 10/22/01 P 3045 -17 34 000 -189 1 500 11 8 9 170 10 1700 1 600 0 34 01/15/02 P 29 90 -16 79 000 055 2100 18 <5 0 350 34 1400 1 200 22 04/11/02 P 29 07 -15 96 000 0 83 1 700 24 <50 270 13 1000 590 3 3 07/12102 P 3005 -1694 000 -0 98 1,200 10 <10 150 <10 1000 720 2 5 11/20/02 P 32 54 -1943 0 00 -249 1,000 " 9 1 2 9 27 <2 5 920 1 000 020 01/30103 — -- - -- — Well unable to be sampled located in construction area 04128/03 — — — — Well unable to be sampled connected to remedial system 07129103` P 3`198 -18 87 000 — 990 s 9 6 <5 0 60 51 -- 560 — 10/17/03 P 3315 -20 04 000 -1 17 760 <2 5 20 10 51 — 850 — 0IM2104 P 3316 -2005 000 -001 290 <5 0 <5 0 <5 0 <5 0 — 430 230 MW-3 09/05/00 P 11 70 2713 -1543 000 — 499 294 <0 50 <0 50 15 5 562 5 62" — 11/02/00 P 26 41 -14 71 000 0 72 116 6 55 <0 500 <0 500 142 <2 5 29 1 7 03/05101 P 26 21 -14 51 000 020 799 646 <0 500 <0 500 0 653 <2 5 2 64 3 8 05/08!01 P 25 83 -1413 000 038 <50 <0 500 <0 500 <0 500 <0 500 363 3 98 046 07/20/01 P 2724 -15 54 000 -141 <50 <0 50 <0 50 <0M <0 50 7 7 22 — 10/22/01 P 2910 -1740 000 -186 250 9 5 <0 50 <0 50 <0 50 29 <2 0 098 01/15/02 P 2852 -1682 0 00 058 1600 74 11 <5 0 7 6 180 1 0 40 04/11/02 P 2765 -1595 0 00 0 87 <50 2 2 <0 50 <0 50 <0 50 4 7 2 0 3 5 07/12/02 P 28 72 -1702 0 00 -107 240 8 7 1 3 072 1 0 14 0 1 2 3 3 11!20/02 P 31 17 -1947 000 -245 610 " 5 6 54 5 0 5 8 66 0 14 002 01/30103 P 3036 -1866 000 0 81 1 100 43 22 33 49 20 055 0 93 Project!ARCO/4932/Reports/Tables/1004 gwtables4932