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Barr Engineering Company <br />- <br />LOG OF PIEZOMETER <br />BARB (Reference Boring No. B -3) <br />Sheet 1 of 4 <br />Location: West Elk Mine, Somerset, <br />Client: Mountain Coal Company <br />CO <br />Barr Project Number: 06/261003 <br />Surface Elevation: 6366.64 <br />Top of Casing Elevation: <br />STRATA <br />PIEZOMETER <br />= <br />o <br />PIEZOMETER CONSTRUCTION DETAILS <br />J <br />-71 m DETAILS <br />DESCRIPTION <br />w � <br />> v <br />FOR <br />o g <br />o <br />j <br />STANDPIPE PIEZOMETER <br />N <br />W <br />PROTECTIVE CASING <br />TRC <br />I <br />Diameter: 6" <br />r� <br />Type: Steel round 5' long <br />Interval: <br />0 <br />SILT (ML) Medium -dark <br />brown slightly moist silt <br />RISER CASING <br />with fine - medium <br />grained sand, clay and <br />Diameter: 2" <br />siltstone inclusions. <br />Type: PVC Sch 40 <br />Interval: <br />s <br />GROUT <br />Type: <br />Interval: <br />SEAL <br />Type: Bentonite chips <br />SANDY LEAN CLAY <br />Interval: 80' -85' <br />(CL) Dark brown slightly 10 <br />moist sandy lean clay <br />SANDPACK <br />with fine to medium <br />Type: Colorado silica sand <br />grained sand inclusions. <br />Some coal and siltstone <br />Interval: 85' -100' <br />fragments, trace organic <br />material @ 10 feet. <br />SCREEN <br />Diameter: 2" <br />SANDSTONE Light 15 <br />Type: PVC Sch 40 0.01" <br />brown slightly moist <br />sandstone. <br />Interval: 89' -99' <br />20 <br />COAL Black, slightly <br />moist fractured and 25 <br />friable coal. <br />i <br />Drilled hole to 100', finished 17:15 on 6/19. Began setting standpipe on <br />SILTSTONE x x <br />6/20. Using 6" point at end. <br />Light <br />Completion Depth: 100.0 <br />Date Started: 6/18/09 <br />LEGEND TPC TOP OF PROTECTIVE CASING <br />Date Completed: 6/19/09 <br />TRC TOP OF RISER CASING <br />WATER LEVELS <br />Logged By: BSE <br />El FILTER PACK BC BASE PROTECTIVE CASING <br />Drilling Contractor: Haztech <br />GS GROUND SURFACE <br />■ BENTONITE <br />WATER LEVEL: T 75.28 ft <br />Drilling Method: HSA/CORE <br />BS BENTONITE SEAL <br />® CEMENT GROUT FP FILTER PACK <br />DATE: 09 -21 -2009 <br />Coordinates <br />North: 402650.2 <br />TSC TOP OF SCREEN <br />M CUTTINGS / BACKFILL BSC BOTTOM OF SCREEN <br />TIME: 00:00 <br />East: 1450672.6 <br />TD TOTAL DEPTH <br />10 <br />r <br />Ill <br />IG sa aauwuurIM le5 represent approwmate boundaries. ! ne transition may be gratluai. <br />