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9 M M M M M M <br /> Table A-1 <br /> Historical Groundwater Analytical Results <br /> San Joaquin County Human Services Agency <br /> Analyte Concentrations(Ag/L) <br /> Well Groundwater Total <br /> No Sample Date Elevation(ft) Benzene Ethyl-benzene Toluene Xylene(total) TPH-g TPH-9 Lead <br /> MW-2 12/11/02 NM 11,000 550 ND0DO) ND(100) 25,000 -- -- <br /> 12/11/02 (dup) NM 11,000 760 ND(100) ND(100) 28,000 -- -- <br /> I <br /> 06/11/03 NM 11,000 680 ND(1DD) 860 25,000 -- -- <br /> 6/11/03 (dup) NM 11,000 600 ND(1100) 740 24,000 -- -- <br /> 10/6/03 NM 9,400 360 ND(50) 270 24,000 -- -- <br /> 1/13/04 NM 15,000 ND050) ND(50) 270 27,000 -- -- <br /> 3/31/04 NM 12,000 160 ND(50) ND(50) 25,000 -- -- <br /> 6/25/04 NM 11,000 360 ND 540 16,000 - - <br /> 6/25/04 (dup) NM 11,000 370 120 530 17,000 - - <br /> 9/15M NM 11,000 440 ND(o50) 470 22,000 <br /> MW-2A 7/25/95 -2982 7,000 3,800 3,300 11,000 79,000 -- -- <br /> 8/30/96 -2547 2,300 2,500 100 3,600 22,000 -- -- <br /> 12/4/96 -2513 2,000 1,900 160 2,800 17,000 -- -- <br /> 2/24/97 -2190 11900 1,300 940 2,600 19,000 -- -- <br /> 5/21197 -2110 1,900 1,200 710 11,800 17,000 -- -- <br /> 9/19/97 -21 84 920 870 150 550 11,000 -- -- <br /> 12/16/97 -2201 200 160 14 50 1,400 -- -- <br />