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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br />• NUCLA AND NUCLA EAST MINES <br />14onitor Well Name GW-N22(1JN0022) Geologic Unit Monitored Alluvium (Calamity Draw) <br />Elevation Ground Level (ft-anisl) 5604.7 <br />Location: N 597138.993 E 1,116032.91746 N R 16 W S 1 D A C <br />Total Drill Depth (ft) 25.0 <br />Total Well Deptlr (ft) 23.6 <br />Drilling Details <br />Borehole Uianieter (in) h ~/q Nig 4py_edstar 1500 <br />Bits Tricone Driller Allan Chiles <br />Urilling Fluid Nor <br />Additional Uetails Large cavity at bottom of hole due to caving gravel horizon. <br />Drilling/Construction: Start 07/11/II6 Finish 07/12/86 <br />Litirologic Log (Y/N) y <br />Geophysical Log (Y/N) N <br />• <br />Construction Uetails <br />Casing Specs: Blank 4"id PVC sch40 <br />Perforated Interval(s) q•0' - 23.6' <br />Packer and Cement Basket Set At 'lA <br />Cement Fronr 0.0' <br />Perforated 0.05" slot <br />To 4.0' <br />Bentonite Slurry From NA To <br />Gravel Pack Frvin 8.0'(?) Tv 23.6' <br />Additional Uetails Ran out of gravel before reaching to within 4' of ground <br />surface but gravel was above the water table. <br />Development Sunnrrary 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 />Connnents, Problems in nrriar to curfara coal tha hnla, a ruhhar parkar wac chnvad <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 />