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WESTERN CEO-ENGINEERS <br /> TABLE 2 <br /> GROUNDWATER MONITORING WELL DESIGN <br /> Well Numbers <br /> GW-1 , GW-2 , GW-3 <br /> Total Depth : 26 ft . <br /> Casing Materials : Polyvinyl Chloride (PVC) <br /> Borehole Size : 7-7/81- <br /> Screened Interval : 26 to 10 ft. <br /> Gravel Pack : Washed Medium Aquarium Sand <br /> Screen Slot Width : 0 . 020 inch <br />