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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 i Groundwater of Well 3 Thickness Elevation <br /> ID Measured feet ms]) feet b s) (feet b s) (feet) {feet msE <br /> VW-16 10/3/00 NM 5800 5900 <br /> 12/27/00 5840 <br /> 12/29/00 5840 <br /> 2/7/01 5860 <br /> 8120/01 58 10 <br /> 3/25102 58 13 <br /> 6/20/02 5823 <br /> VW-17 10/3/00 29920 Dry 10200 Dry <br /> 12/27/00 Dry Dry <br /> 12/29/00 Dry Dry <br /> 217/01 Dry Dry <br /> 8/20/01 Dry Dry <br /> 3/25102 Dry Dry <br /> 6120/02 Dry Dry <br /> VW-18 10/3/00 27441 Dry 7300 Dry <br /> 12/27/00 Dry Dry <br /> 12/29/00 Dry Dry <br /> 2/7/01 Dry Dry <br /> 8/20101 7295 <br /> 3/25/02 7295 <br /> 6120/02 7293 <br /> . VW-19 10/3/00 27633 Dry 8800 Dry <br /> 12/27/00 Dry Dry <br /> 12/29/00 Dry Dry <br /> 2/7/01 Dry Dry <br /> 8/20/01 Dry Dry <br /> 3/25/02 Dry Dry <br /> 6/20/02 Dry Dry <br /> VW-20 10/3/00 27508 7779 7800 <br /> 12/27/00 7776 <br /> 12/29/00 7777 <br /> 2/7/01 Dry Dry <br /> 8/20/01 Dry Dry <br /> 3125/02 7770 <br /> 6/20102 7764 <br /> msl=mean sea level <br /> bgs=below ground surface <br /> i Top of casing elevations surveyed October 2001 by Marrow 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 /> 3A measured during sampling <br /> Casing cut 0 12 feet on 3/25102 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 ftom 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_6100_Quarterly_Data xis Page 6 of 6 <br />