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ATTACHMENT 3 <br />WELL CONSTRUCTION DETAILS <br />FOOTHILL LANDFILL <br />Site GSE <br />TOC <br />TOP <br />BOP <br />Total <br />Casing <br />Packing <br />Screen Casing <br />Number (MSL) <br />(MSL) <br />(MSL) <br />(MSL) <br />Depth <br />X Y OD (in.) <br />Material <br />Size Material <br />LW -1 310 <br />310.4 <br />-1.6 <br />-131.6 <br />442 <br />2189.064 3683.872 12.0 <br />None <br />(1) Metal <br />-1 253 <br />256.25 <br />66.25 <br />46.25 <br />215.0 <br />4887.002 4310.997 5.0 <br />#2/12 Sand <br />0.02 Schedule 80 PVC <br />-2 267 269.95 63.95 43.95 226.5 2688.085 1939.854 5.0 #2/12 Sand 0.02 Schedule 80 PVC <br />Notes <br />MSL - Mean Sea Level Elevation Reference, in feet. <br />GSE - Ground Surface Elevation.(Elevation to nearest foot) <br />TOC - Top of Well Casing surveyed to nearest 0.05 foot. <br />TOP - Top of Well Perforation. <br />BOP - Bottom of Well Perforation. <br />Total Depth -in feet, measured from the ground surface. <br />Xx - Horizontal coordinates, in feet, are referenced to datum from 1987 Landfill Mapping Project. <br />Screen size -slot width in inches. <br />- Vertical (elevation) coordinates are referenced to USGS datum based upon benchmarks provided by the San Joaquin <br />County Public Works Department. <br />(1) - This well is open to the formation (no screen)below the 312 foot depth (4.6 MSL). <br />-1 2202MSI -DOC A:\220002\SnEMSTR.DOC <br />LJ <br />