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TABLE 4 <br /> MONITORING WELL CONSTRUCTION DETAILS <br /> VERNALIS PUMP STATION <br /> Vernalis, California <br /> Measuring Point Screened Well Bentonite Seal <br /> Date Total Depth Elevation Interval Casing Diameter Slot Size Interval <br /> Well ID Installed (feet bgs) (feet MSL)' (feet bgs) Type (inches) (inches) (feet bgs) <br /> MW-1 07/21/98 39 106.38 28 -38 PVC 4 0.010 24- 26 <br /> MW-2 07/21/98 38 108.50 28-38 PVC 4 0.010 24-26 <br /> MW-3 07/21/98 39 108.33 28-38 PVC 4 0.010 24-26 <br /> MW-4 07/21/98 39 109.27 28-38 PVC 4 0.010 24-26 <br /> MW-5 05/17/05 52 109.31 31 -51.5 PVC 2 0.010 25 -28 <br /> MW-6 05/18/05 50 104.97 30- 50 PVC 2 0.010 25 -28 <br /> [—MW-7 05/23/05 49.5 106.00 29.5 -49.5 PVC 2 0.010 23.5 -26.5 <br /> _j <br /> Abbreviations: <br /> bgs=Below ground surface <br /> ID=Identification <br /> MSL=Mean sea level <br /> MW=Monitoring well <br /> PVC=Polyvinyl chloride <br /> Note: <br /> 1. Measuring point elevation surveyed by West Yost and Associates on January 9,2002. <br /> Z ::: <br /> artNS�0 <br /> From Science to Solutions <br /> Pagel of 1 <br />