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TABLE 1 <br /> WATER LEVEL DATA <br /> SHELL OIL COMPANY <br /> 3725 TRACY BOULEVARD, TRACY, CALIFORNIA <br /> (Measurements in feet) <br /> Monitoring Reference Depth to Groundwater <br /> Well Date Elevation Groundwater' Elevation2 Well Depth <br /> (top of casing)' <br /> MW-1A 02/26/91 9701 895 8806 --- <br /> 05/17/91 911 8790 --- <br /> 08/20/91 945 8756 --- <br /> 11/21/91 <br /> -- <br /> 11/21/91 928 8773 --- <br /> 02/14/92 855 8846 2230 <br /> 02/20/93 754 8947 2228 <br /> MW-2A 02/26/91 9722 900 8822 --- <br /> 05/17/91 919 8803 --- <br /> 08/20/91 951 8771 --- <br /> 11/21/91 <br /> -- <br /> 11/21/91 946 8776 --- <br /> 02/14/92 868 8854 2060 <br /> 02/20/93 770 8952 2064 <br /> MW-3A 02/26/91 9829 995 8834 --- <br /> 05/17/91 1021 8808 --- <br /> 08/20/91 1071 8758 --- <br /> 11/21/91 1046 8783 --- <br /> 02/14/92 952 8877 2210 <br /> 02/20/93 808 9021 2210 <br /> NOTES --- - Not measured <br /> ' = Measurement and reference elevation taken from notch/mark on <br /> top north side of well casing <br /> 2 = Elevation referenced to a benchmark with an assumed elevation <br /> of 100 feet <br /> Well Depth = Measurement from top of casing to bottom of well <br /> The original wells, MW-1 through MW-3, were decommissioned in July 1990 during <br /> station reconstruction They were replaced by MW-1 A through MW-3A in August 1990 <br /> Aegis Environmental Inc <br /> 90-069/March 29 1993 <br />