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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 Floating Product Groundwater <br /> Well Date Elevation Groundwater of Well 3 Thickness Elevation <br /> fD Measured (feet msl) (feet b s) feet b s) (feet) (feet msl) <br /> VW-20 10/3/2000 27508 7779 7800 <br /> 12/27/2000 7776 <br /> 12/29/2000 7777 <br /> 2/7/2001 Dry Dry <br /> 8/20/2001 Dry Dry <br /> 3/25/2002 7770 <br /> 6/20/2002 7764 <br /> 9/16/2002 7765 <br /> 12/22/2002 7771 <br /> 3/24/2003 7771 <br /> ms]= mean sea level <br /> bgs=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 /> 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 10 ft and does not appear to be groundwater from surrounding formation, <br /> well mterpretted 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-61 00—Quarterly_Data Page 16 of 16 STRATUS <br />