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s � s <br /> Table 2. Summary of Groundwater Monitoring Data- Water Elevations and Analyses <br /> ARCO Facility 5450, Stockton, California <br /> Change <br /> Top-of-casing Depth -to- Product Water-level since last Concentrations in mg/L mg/L <br /> Well number elevation, water, thickness, elevation, measurement, Total <br /> and date in feet in feet in feet in feet in feet Benzene Toluene Ethylbenzene Xylenes TPH-G MTBE DO <br /> MW-1 <br /> 7/30/96 -- -- -- -- 054 <0 5 <0 5 <0 5 <50 35 <br /> 11/15/96 12 37 -- -- -- <0 5 <0 5 <0 5 <0 5 <50 8 -- <br /> 3/19/97 889 -- -- -348 <0 5 <0 5 <0 5 <0 5 X50 19 026 <br /> Notes Dash indicates of measured or calculated <br /> TPI I-G =Total Petroleum I lydrocarbons as Gasoline <br /> MTBE= Methyl Tertiary Butyl Ether <br /> DO= Dissolved Oxygen, Field measurement <br /> 487011 A13UM5450MAR7 XLS <br />