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• Page�3 of 28 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2133 <br /> 2908 Benjamin Holt Dr,Stockton,California <br /> Well Depth Product Groundwater Groundwater Total <br /> Date Elevation to Water thickness, Elevation Elevation change TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> BHD-1 8116!90 1789 — -1731 -129 — -- — — -- <br /> (cont) 9117/90 1724 — -1666 065 — -- — -- — <br /> 9/18/90 1724 -- -1666 0 00 2,000 110 9 30 650 <br /> 10/11/90 1731 — -1673 -007 — — -- — — — <br /> 1216/90 1724 -- -1666 007 -- — — — — <br /> 2/11191 1692 — -1634 032 6,000 890 60 1,000 360 — <br /> 2/25/91 1686 -- -1628 006 — — -- — — — <br /> 4123191 1599 — -1541 087 3,300 240 48 440 130 — <br /> 7116/91 1800 -- -1742 -201 7,000 420 420 400 830 — <br /> 10/8191 1850 — -1792 -050 3,000 220 <40 210 15 -- <br /> 1121192 1712 — -1654 138 4,600 200 240 <10 260 — <br /> 4CZ2/92 1639 — -1581 073 3,000 130 67 200 120 — <br /> 7l29192 1793 — -1735 -154 8,100 260 21 600 510 — <br /> 10/29/92 1 B 35 — -17 77 -042 1,800 80 <25 110 17 — <br /> 1/27193 1527 -- -1469 308 6,700 270 19 790 300 — <br /> 4r9193 1336 — -1278 1 91 7,000 340 <20 610 460 — <br /> 8/5193 1485 — -1427 -1 49 10,000 280 31 930 950 — <br /> 11/10/93 1523 -- -1465 -0 38 10,000 220 11 570 420 — <br /> 3121194 1436 — -1378 087 8,600 83 14 480 360 — <br /> 6127/94 1430 -- -1372 0 06 9,600 110 32 490 420 — <br /> 9/29194 15 46 — -1488 -116 7,200 170 12 460 340 — <br /> 12/8/94 1499 — -1441 0 47 8,200 160 14 560 640 —3/8195 1281 -- -1223 218 6,000 84 6 2 300 97 — <br /> 611195 1129 — -1071 152 7,100 97 <5 370 250 — <br /> 9/11195 1321 -- -1263 -192 5 600 110 6 340 270 — <br /> 12/5/95 1370 -- -1312 -049 9,200 74 <10 470 410 — <br /> 3/18/96 938 — -880 432 4,200 99 28 360 320 -- <br /> 6/16196 950 -- -892 -012 5,500 82 <10 430 300 <100 <br /> 9rZ5196 11 80 — -1122 -230 4,600 75 55 280 160 <50 <br /> 12!4196 1150 — -1092 030 4,500 83 11 350 220 <50 <br /> 3119197 P 702 — -644 448 2 300 54 <10 190 100 — <br /> 615197 NP 8 38 — -7 80 -1 36 3,500 39 3 76 12 170 <br /> 8119197 NP 998 -- -940 -160 440 79 094 <0 5 <0 5 360 <br /> 11/25/97 NP W 42 -- -9 84 -044 1,300 28 085 7 9 28 220 <br /> 7G600-019-Ol/GW Tables <br />