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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-N22(WN0022) Geologic Unit Monitored Alluvium (Calamity Draw) <br /> Elevation Ground Level (ft-amsl ) 5604.7 <br /> Location: N 597138.998 E 1,116032.91346 N R 16 W S 1 D A C <br /> Total Drill Depth (ft) 25.0 <br /> Total Well Depth ( ft) 23.6 <br /> Drilling Details <br /> Borehole Diameter ( in) 6 3/4 Rig Speedstar 1500 <br /> Bits Tricone Driller Allan Chiles <br /> Drilling Fluid Air <br /> Additional Details Large cavity at bottom of hole due to caving gravel horizon. <br /> Drilling/Construction: Start 07/11/86 Finish 07/12/86 <br /> Lithologic Log (Y/N) Y <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs : Blank 4"id PVC sch40 Perforated 0.05" slot <br /> Perforated Interval (s) 4.0' - 23.6' <br /> Packer and Cement Basket Set At NA <br /> Cement From 0.0' To 4.0' <br /> Bentonite Slurry From NA To <br /> Gravel Pack From 8.0' ( ?) To 23.6' <br /> Additional Details Ran out of gravel before reaching to within 4' of ground <br /> surface but gravel was above the water table. <br /> Development Sunnnary Air injection for 2 hours making approximately 5 gpm but water <br /> never cleaned up at all from an initial muddy red-brown color. <br /> Comments, Problems In nrder to surface teal the hole, a ruhher packer wac, chovPd <br /> down 4.0' to the top of the screened interval and then cemented on top to ground <br /> surface. <br /> D-19 Revised 11/01/86 <br />