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TABLE 2 <br /> GROUNDWATER LEVEL DATA <br /> ARCO Service Station No. 6100 ; <br /> 25775 Patterson Pass Road t <br /> 1 <br /> Tracy, California ; <br /> Top of Casing Depth to Total Depth Water Floating ProductGroundwater <br /> Well Date Elevation ' Groundwater of Well 3 Column Thickness Elevation <br /> ID Measured (feet msl) (feet b s) (feet b s) (feet) (feet) (feet msl) <br /> VW-20 10/03/00 275.08 77.79 78.00 <br /> 12/27/00 77.76 <br /> 12/29/00 77.77 <br /> ` 02/07/01 Dry Dry <br />' 08/20/01 Dry Dry <br /> 03/25/02 77.70 78.00 0.30 <br /> 06/20/02 77.64 78.00 0.36 <br /> i <br /> 09/16/02 77.65 78.00 0.35 <br /> 12/22/02 77.71 78.00 0.29 <br /> ` 03/24/03 77.71 78:00 0.29 * `' <br /> 06/16/03 77.47 78.00 0.53 <br /> } <br /> I <br /> msl= mean sea level <br /> gs=below ground surface > <br /> I Top of casing elevations surveyed October 2001 by Morrow Surveying <br /> Well MW-1 is monitored on a weekly basis, and free product is measured and removed; <br /> see Table 1 for additional information/details. <br /> . As measured during sampling. <br /> Casing cut 0.12 feet on 3125/02 due to a crack in the PVC. Casing elevation not re-surveyed. <br /> F <br /> Field technician noted "dirt in casing". f <br /> * Water observed in well is less than 1.0 ft. and does not appear to be groundwater from surrounding formation; G <br /> I <br /> well interpretted to be dry. <br /> ** Groundwater elevations corrected for the presence of floating product as follows: I <br /> (top of casing elevation-depth to water+(0.7 x product thickness)} <br /> 1 <br /> M <br /> 1 � <br /> Arco 6100Quarterly_Data Page 16 of 16 5TKA 105 <br />