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�. TABLE 2 <br /> GROUNDWATER LEVEL DATA <br /> ARCO Service Station No. 6100 <br /> 25775 Patterson Pass Road <br /> Tracy, California <br /> 1 IA <br /> f <br /> Top of Casing Depth to Total Depth Water Floating Product Groundwater <br /> Well Date Elevation � Groundwater. of Well 3 Column Thickness Elevation <br /> ID Measured (feet msl <br /> ) (feet bs) (feetbs) (feet} (feet) (feet msl) <br /> VW-20 10703/00 275.08 77.79 78.00 <br />?. f 12/27/00 77.76 <br /> 12/29/00 77.77,. <br /> i <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 /> 09/16/02 77.65 78.00 0.35 � <br /> 12/22/02 77.71, 78.00 0.29 <br /> 03/24/03 77.71y 78.00. 0.29 <br /> 06/16/03 77.47;. 78.00 0.53 <br /> 09/18/03 77.6.1 78.00 0.39 <br /> ms]=mean sea level { <br /> gs=below ground surface <br /> 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 /> f; As measured during sampling. j <br /> 4 <br /> Casing cut 0.12 feet on 3/25/02 due to a crack in the PVC. Casing elevation not re-surveyed. <br /> Field technician noted "dirt in casing". <br /> * Water observed in well is less than 1.0 ft. and does not appear.to be groundwater from surrounding formation; <br /> well interpretted to be dry. ' <br /> ** Groundwater elevations corrected for the presence of floating product as follows: <br /> (top of casing elevation-depth to water+(0,7 x'product thickness)} <br /> i <br /> Arco_6I00 Quarterly_Data Page 17 of 17 5TKA TU5 <br />