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r FBtcon Ground-Water Monitoring January 8, 1990 tion No. 492, Manteca, California AGS 86102-4 TABLE 2 CUMULhTIVE RESULTS OF LABORATORY ANALYSES ® OF GROUND-WATER SA14PLES Bea,.on Station No. 3-492 470 North Main Street Manteca, California Well Number Ethyl- Total and Date Benzene Toluene benzene Xylenes TPH TVH gw-1 12/04/86 0.077 0.024 0.145 0.0569 NA 7.297 05/14/87 0.158 0.143 0.305 1.430 NA 17.73 01/15/88 0.005 0.088 0.055 0.376 2.49 NA 40 06/07/88 0.32 1.66 0.66 4.50 21.00 NA 09/06/88 NA NA NA NA NA NA 12/05/88 NA NA NA NA NA NA 03/02/89 0.026 0.025 0.015 0.272 6.3 NA 07/20/89 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 NA 10/18/89 0.086 0.0025 0.018 0.130 1.20 NA M XW-2 12/04/86 0.054 0.132 0,,061 0.829 NA 1.829 y 05/14/87 0.725 3.086 0.497 4.475 NA 17.:495 01/15/88 0.031 0.068 0.006 0.264 11.60 NA 06/07/88 0.015 0.200 0. 44 . 0.310 1.26 NA w 09/06/88 0.0015 0.001 <O. DO05 0.0063 0.03 NA 12/05/88 0.0014 <C.0005 <0. 3005 0.0035 0.04 HA 03/02/89 <0.0005 <0.0005 <0.0005 <0.001 0.06 NA 07/20/89 <0.0005 <0.0005 <0:0005 <0.0005 <0.0005 NA l0/11/89 0.018 0.007. 0.1324 0.052 0.300 NA 3 9� HN-3 12/04/86 <0.001 0.004 <0.001 0.008 NA 0.034 05/14/87 0.0021 0.0053 0.0015 0.0114 NA 0.119 01/14/88 0.0027 0.0106 O.G024 0.0252 0.100 NA 06/07/88 0.003 -0.035 0.023 0.151 1.17 NA 09/06/88 <0.0005 <0.0005 <0.0005 <0.0005 <0.02 NA 12/05/88 <0.0005 [0.0005 <0.0005 <0.0005 <0.02 NA 03/02/89 <0.0005 <0.0005 <0.0005 0.004 0.05 NA 07/20/89 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 NA X1/8,9._ <0-._0.005 <0.0005 _<.0._0005 <0.0005 <0.050 -- -NP'- ----- --- - ---- z +�•✓ Concentrations given in parts per million TVH 'dotal volatilehydrocarbons j TPH = Total petroleumhydrocarbons as gasoline NA Not analyzed Applded GeoSystems