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Table 1. Summary of Groundwater Monitoring Data: Water Elevations and Analyses <br /> ARCO Facility 434, Lodi, California <br /> Top-of-casing Depth-to- Water-level Change since <br /> Well number elevation, water, elevation, last measurement, Concentrations in t g/L <br /> and date in feet(a) in feet in feet in feet Benzene Toluene Eth lbenzene Xylenes TPH-G MBTE <br /> 5119195 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 8110195 64.43 -2198 -3.55 -- -- -- -- --8/11/95 -- -- -- <0.5 <0.5 <0.5 <0.5 <50 -- <br /> 11/17/95 63.21 -20.76 {c) 1.22 -- -- -- -- --2/14/96 60.98 -18.53 2.23 <0.5 <0.5 <0.5 3.3 <50 -- <br /> 5/9/96 60.47 -18.02 0.51 -- -- -- -- -- <br /> 916196 64.78 -22.33 -4.31 <0.5 <0.5 <0.5 <0.5 <50 <5 <br /> 11/22/96 62.73 -20.28 2.05 -- -- -- -- -- -- <br /> (a) Elevation based on City of Lodi benchmark #786 located on the corner of <br /> Kettleman Lane and Hutchins Street. Elevation of benchmark is 43.11 feet <br /> above sea level. <br /> (b)New well replaced in same borehole as former well W-2. <br /> (c) Possible anoiMalous value. <br /> Notes: Dash indicates not measured or analyzed. <br /> TPH-G =Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015, Modified. <br /> BTEX Distinction by EPA Method 8020. <br /> MTBE=Methyl Tertiary Butyl Ether by EPA Method 8020. <br /> Wells W-2A, W-2B, W-7, W-8, W-10, W-1 1,and W-12 are on a semi-annual sampling schedule. Sampled during the first and third quarters of each year. <br /> 33821TABLF-SW34N0V6ALS <br />