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e2Q�Ea GEOMATRIX TABLE 3 WELL SURVEYING AND GROUNDWATER ELEVATION DATA' U.S. Can/Welty Road Vernalis, California Depth to Thickness of Top-of-Casing Total Depth Screen Water Below Water Level Separate Phase Elevation of Well Interval Top-of-Casing Elevation Petroleum Well Northing Easting (feet,MSL) (feet,bgs) (ft,bgs) Date (feet) (feet,MSL) (feet) MW-16 2053098.2 6333463.6 104.42 40 25-40 06/01/99 31.62 72.80 0.02 05/21/02 NM NM 0.01 MW-27 2053439.5 6333177.2 103.11 40 NA 06/01/99 30.12 72.99 0.02 05/21/02 32.44 70.67 sheen 08/07/03 31.78 71.33 sheen MW-37 2053030.1 6333523.4 104.21 40 NA 06/01/99 31.30 72.91 none 05/21/02 33.74 70.47 none 08/07/03 33.37 70.84 none MW-47 2052746.6 6333543.3 105.32 NA NA 06/01/99 32.23 73.09 none 05/21/02 34.81 70.51 none WFSMW-18 NA NA 105.31 49 24-48 06/01/99 NM NM NM 05/21/02 34.56 70.75 none Notes: ' Wellhead elevations and groundwater elevations were based on the National Geodetic Vertical Datum of 1929(NGVD29). The horizontal datum is based on the North American Datum of 1983 (NAD83). The benchmark used was United States Coast and Geodetic Survey brass disk with NGS designation "M-745"(PID Number MS0037);elevation of 104.18 feet(NGVD29). 2 Monitoring well elevation in feet above mean sea level(MSL)based on benchmark elevation surveyed by RGA,July 1998. 3 NM=Not measured. 4 Immeasurable sheen noted in well. 5 NA=Not available 6 2-inch diameter monitoring well installed September 1996 by V&W Drilling Company with hollow stem augers,under the oversight of Geological Technics,Inc. 7 2-inch diameter monitoring well installed July 1998 with hollow stem augers,under the oversight of Radian International. 8 2-inch diameter monitoring well installed November 19, 1996 by Gregg Drilling and Testing with hollow stem augers,under the oversight of GeoSyntec Consultants,Inc. is\doc_safe\6000s\6447.001\offsite rpt\2003 us can tbis.xls