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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(ug1L) <br /> Well Groundwater Total <br /> No Sample Date Elevation(#t) Benzene Ethyl-benzene Toluene Xylene(total) TPH-g TPH-e Lead <br /> MW-9 12/10/02 -1861 ND(05) ND(05) ND(05) ND(05) ND(50) — -- <br /> 6110103 -1811 ND(05) ND(o5) ND(05) ND{0s} ND(50) -- -- <br /> 1016103 -1929 ND(05) ND(O5) ND(O5) ND(05) ND(50) -- -- <br /> 01/13/04 -1866 ND(0 5) ND(0 s) ND(a 5) ND(0 s) ND(50) -- -- <br /> 3131104 -1864 ND(a 5) ND(05) ND(05) ND(05) ND{50) — -- <br /> 6/2404 -1914 NDOs ND05j ND(05) NDpS NDI50 -- -- <br /> 9/15/04 -2010 N D(0 s) N D(a s) N D(o 5) ND(05) N D(s0) _ -- <br /> 12116/04 20.66 1 ND ND ND ND ND <br /> Table A-1 Notes <br /> J = Detected below the detection limit <br /> f491=micrograms per liter <br /> NDt05s = Analyte not detected Detection lima indicated in parentheses <br /> NM=Not measured <br /> TPH-e=Total petroleum hydrocarbons extractable <br /> TPH-g=Total petroleum hydrocarbons as gasoline <br /> = Sample was not analyzed for constituent <br /> ' = Top of casing not surveyed to established benchmark <br /> s = Well abandoned <br /> = Bottom 8 feet of well has collapsed <br /> I <br /> 13 of 13 <br />