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TABLE 1 <br /> Existing Monitoring Well Information <br /> City of Tracy WWTP TSD Monitoring Welt Installation Work Plan _ <br /> Well Owner Year Well Screened Relative Range of <br /> No. Installed Depth' Interval' Elevation of Top Depth to Water <br /> of Casing" Measurements° <br /> HP-1 City of Tracy 1990 25.5 5-25 100.0 12,88 to 16.87 <br /> HP-2 City of Tracy 1990 28 7.5-27.5 99.83 14.50 to 19.00 <br /> HP-3 City of Tracy 1990 29 8.5-28.5 98.64 14.67 to 18.83 <br /> HP-4 City of Tracy 1990 30.5 10-30 98.90 13.00 to 18.92 <br /> HP-5 City of Tracy 1994 40 19.5-39.5 101.79 13.45 to 18.92 <br /> WP-1 Spreckels Sugar 1985 35.6 unknown 15.21 3.94 to 12.13 <br /> Notes <br /> ' Intervals are in feel, measured from ground surface <br /> ° Includes two feet of#60 silica sand above the filter pack <br /> ` Well elevations are measured relative to HP-1 for City of Tracy wells. Spreckels well is surveyed to a <br /> different datum(possibly NGVD). <br /> " For the period of record for depth to water measurements,excluding the W WTP construction dewatering <br /> period of October 2004 through June 2007,as measured from the measuring point(2 to 3 feet above grade). <br /> October 31,2007 10 <br />