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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 /> 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 feet b s feet b s feet feet feet msl <br /> VW-20 10/03/00 27508 7779 7800 <br /> 12/27/00 7776 <br /> 12/29/00 7777 <br /> 02/07/01 Dry Dry <br /> 08/20/01 Dry DD' <br /> 03/25/02 7770 7800 030 <br /> 06/20/02 7764 7800 036 <br /> 09/16/02 7765 7800 035 <br /> 12/22/02 7771 7800 029 <br /> 03/24/03 7771 7800 029 <br /> 06/16/03 7747 7800 053 <br /> 09/18/03 7761 7800 039 <br /> 12/22/03 7764 7800 036 <br /> msl=mean sea level <br /> bgs=below ground surface <br /> I Top of casing elevations surveyed October 2001 by Morrow Surveying <br /> Well MW-I 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 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 /> Arco_6100_Quarterly_Data Page 17 of 17 5TRA TU5 <br />