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<br />8" STEEL COVER WITH HINGED OPENING AND <br />LOCKING DEVICE <br />1/4" DIAMETER WEEP HOLE <br />2.5' <br />GROUND MINIMUM <br />SURFACE -? i <br /> <br /> ' <br />?r L - :rte <br /> ? <br /> <br /> BURRO CANYON "_' <br /> FORMATION <br /> Kbc - '" <br /> <br /> ^ <br /> y <br />}1 i wti:: <br />_ _ ? ;. f` X44'_= ^y <br /> 90, <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> o <br />N <br /> <br /> - BRUSHY BASIN <br /> Jmb (CONFINING LAYER) <br /> Z <br /> <br /> <br /> <br /> <br /> <br /> <br /> 0 - 729 <br /> Z <br /> O <br /> U <br /> c <br /> oC 00 <br /> O <br /> oa <br /> Jms UPPER RIM Z <br /> <br />to <br />(Upper <br />:: - SANDSTONE, <br />H a <br />Elf <br /> to Rim) SALT WASH c o Ld o <br /> Y : (AQUIFER) o } <br /> <br /> o wa <br />a H _ <br />~ m o <br />L <br />J <br />d <br />a o <br />0 I <br />o <br />~ <br /> M <br />o <br />Z J <br /> 0-800' <br /> <br /> <br /> <br />VENTED CAP OR PLUG <br />2.0' PROVIDE LOCK (HEAVY DUTY WITH <br />(MIN) MASTER KEY) <br />COARSE SAND OR PEA GRAVEL <br />\ 1„ 2" 6" <br />2 5' <br />MINIMUM •r- <br />6' (MAX) <br />M \ ?- CONCRETE PAD <br />BENTONITE PELLETS <br />CEMENT GROUT WITH 1-4% BENTONITE <br />ADDITIVE <br />HEAVY DUTY STEEL CENTRALIZERS, <br />SPACED AT 100' <br />4 1/2" O.D. THREADED AND COUPLED STEEL <br />CASING, API H-40 JOINTS, API 5 CT <br />CEMENT GROUT, INITIAL LIFT TYPE II <br />PORTLAND CEMENT, WITH SET <br />ACCELERATOR <br />FINE SAND <br />BENTONITE PELLET (RETARDED HYDRATION) <br />SEAL I <br />40, (MIN) vx'?: <br />5' <br />5' <br />` STEEL TRANSITION COUPLING ASTM F480 <br />THREADS <br />4" I.D. SCHEDULE 80 PVC 0.020" MILLSLOTTED <br />`: ?• CASING ASTM F 480 FLUSH THREADED JOINTS <br />(NOTE: DEFINED SCREEN LENGTH IS 100') <br />SILICA SAND, SIZE 10-20 <br />PVC, SCHEDULE 80 END CAP <br />11"t DIAMETER BOREHOLE <br />Denison Mines (USA) Corp. IDENISONDA <br />MINES <br />REVISIONS Project: Sunda Mines Grou <br />Date By County: San Miguel tale. Colorado <br />Location: X=2035427.8730 Y = 1529261.5683 Z = 6113.376 <br />MW NORTH <br />Deep Monitoring Well <br />3-3-2010