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Table A-1 <br /> Historical Groundwater Analytical Results <br /> San Joaquin County Human Services Agency <br /> Analyte Concentrations(Fcg/L) <br /> Well Groundwater Total <br /> No Sample Date Elevation(ft) Benzene Ethyl-benzene Toluene Xylene(total) TPH-g TPH-e Lead <br /> 3117198 -1854 1,300 1,000 520 11800 12,000 -- -- <br /> i <br /> 6118198 -1711 1,000 1,200 350 11300 12,000 -- -- <br /> 9117/98 -1639 810 710 81 61 6,000 -- -- <br /> 12/10/98 -1625 610 530 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 /> 5119199 (dup) -1473 2,900 1,200 150 1,300 17,000 -- -- <br /> 8110199 -1517 180 ND(50) ND(50) 200 6,500 -- -- <br /> 8110199 (dup) -1517 210 ND(50) ND(50) 230 6,400 -- -- <br /> 11/16/99 -1594 54 220 ND 33 31300 -- -- <br /> 3/2/00 -1514 400 290 27 130 3,900 -- -- <br /> 5/11/00 -1426 250 160 ND(50) 60 2,900 -- -- <br /> 8110100 -1487 ND(50) 130 ND(50) 12 2,100 —11/2/00 -1552 379 163 N D(5 0) N D(5 0) 3,130 — — <br /> 2127/01 -1519 39 44 ND(50) ND(50) 1,800 — — <br /> 2/27/01 (dup) -1519 35 40 36 57 1,700 — — <br /> 5/17/01 -1494 38 29 45 64 950 -- -- <br /> 5/17/01 (dup) -1494 43 33 50 51 1,100 -- -- <br />