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9 M ' M M M M <br /> Table A-1 <br /> Historical Groundwater Analytical Results <br /> San Joaquin County Human Services Agency <br /> Analyte Concentrations(µg/L) <br /> Well Groundwater Ethyl- Xylene Total <br /> No Sample Date Elevation(ft) Benzene benzene Toluene (total) TPH-g TPH-e Lead <br /> 10/11/01 -1635 40 43 ND(05) ND(o5) 1,000 - <br /> 215102 -1619 25 20 ND(O5) ND(05) 1,200 <br /> 4117102 -1624 310 56 ND(5 o)) 16 1,100 - <br /> 6125102 -1678 13 ND(05) ND(05) ND(05) 570 -- - <br /> i <br /> 9119102 -1784 59 110 74 13 1,400 -- - <br /> 12/11/02 -1858 45 67 ND(50) ND(50) 1,300 - <br /> 06/11/03 -1812 25 11 35 38 1,300 — -- <br /> 1017103 -1919 26 27 48 27 1,700 -- <br /> 1113/04 -1923 48 130 65 27 2,600 - <br /> 3131104 -1872 110 130 95 52 1,800 -- <br /> 6/25/04 -1911 45 23 80 ND(50) 1,300 - - <br /> MW-31,2 12/30/88 NM 28290 073 42 26 ND(200) ND(500) 1,300 <br /> MW-3A 7125195 -3002 ND(05) ND(05) ND(05) ND(05) ND(50) - <br /> 1213196 -2529 N D)0 5) N D(0 5) N Deo 5) N D(2) ND(M) - <br /> 5120197 -2122 ND(05) NDO5j ND(05) ND(2) 150 -- - <br /> 12/16/97 -2218 NDt05) ND105) ND)05) ND(2) ND(50) -- - <br /> 6118198 -1 724 2 ND(05) FNDi,,) ND(2) 240 -- <br /> WCAWPIPROJECTSISANJOW-110003WPD 4 of 12 <br />