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Table 3. Analytical Results,ARCO Station 2133, <br /> Stockton,California(cont'd) <br /> Monitoring well <br /> number Concentrations m u <br /> and date sampled Benzene Eth lbenzene Toluene Xylenes TPH-G a <br /> 9/17190 - -- _ _ <br /> 9/18/90 110 30 9 650 2000 <br /> 2/11/91 890 1000 60 360 6000 <br /> 2/25/91 -- -- -- - - <br /> 4/23/91 240 440 48 130 3300 <br /> 7/16/91 420 400 420 830 7000 <br /> 1019/91 220 210 <4.0 15 3000(b) <br /> BUD-2 <br /> 11/2888 -- -- -- _ _ <br /> 2/2789 -- — — — — <br /> 5/30/89 — _ _ _ <br /> 8/22/89 <0 5 <0 5 <05 <0.5 -- <br /> 12/4/89 -- -- — — — <br /> 1/4/90 <br /> 211/90 -- - - - <br /> 2/15/90 _ _ -- - - <br /> 2/22/90 <br /> 3/8190 <03 <0.5 <05 <0.5 <br /> 4/5/90 <br /> 4/19/90 — — _ _ _ <br /> 5/10/90 — -- -- — — <br /> 5/24/90 -- — -- — — <br /> 6/18/90 _ _ _ - - <br /> 7/12/90 _ _ - - <br /> 8/16/'90 -- _ - _ _ <br /> 9/17/90 <0 5 <03 <0.5 <50 - <br /> 2/11/91 <0 5 <03 <03 <0.5 <50 <br /> 2/25191 - - - - - <br /> 4/23/91 -- - - - - <br /> 7/16/91 <03 <03 <0 5 <03 <50 <br /> 10/9/91 -- -- — — — <br /> (a) TPH-G=TPH as gasoline <br /> (b)unknown hydrocarbon-most likely weathered gasoline <br /> Note Dash mdicates not measured or not analyzed <br />