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MW M M M = = M 0011COM M <br /> Table A-1 <br /> Historical Groundwater Analytical Results <br /> San Joaquin County Human Services Agency <br /> Analyte Concentrations(µglL) <br /> Well Groundwater Total <br /> No Sample Date Elevation(ft) Benzene Ethyl-benzene Toluene Xylene(total) TPH-g TPH-e Lead <br /> MW-2A 9119197 -2184 920 870 150 550 11,000 -- -- <br /> 12/16/97 -2201 200 160 14 50 1,400 — -- <br /> 3/17198 -18 54 1,300 1,000 520 1,800 12,000 - - <br /> 6/18198 -1711 1,000 1,200 350 1,300 12,000 -- -- <br /> 9117198 -1639 810 710 81 61 6,000 — — <br /> 12/10/98 -1625 W 530 71 330 7,200 -- — <br /> 3122199 -1514 1,300 850 160 1,100 14,000 — — <br /> 5119199 -1473 640 550 110 470 10,000 — — <br /> 5/19/99 (dup) -1473 2,900 1,200 150 1,300 17,000 -- — <br /> 8/10/99 -1517 180 ND(50) ND(50) 200 6,500 — — <br /> 8/10199 (dup) -1517 210 ND(50) ND(50) 230 6,400 — <br /> 11/16/99 -1594 54 220 ND 33 3,300 — — <br /> 312100 -1514 400 290 27 130 3,900 — -- <br /> 5111100 -1426 250 160 NDi56y 60 2,900 — — <br /> 8/10/00 -1487 ND(50) 130 ND(50) 12 2,100 — -- <br /> 1112/00 -1552 379 163 ND(50) ND(50) 3,130 -- — <br /> i <br /> 2127101 -1519 39 44 ND(5 0ND 50 1,800 — — <br /> 3of13 <br />