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= Barr Engineering Company LOG OF PIEZOMETER <br />BARR (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 />a <br />Co <br />DETAILS <br />w <br />> <br />FOR <br />DESCRIPTION r <br />o ` <br />° <br />W <br />STANDPIPE PIEZOMETER <br />N <br />PROTECTIVE CASING <br />Diameter. 6" <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 />5 <br />GROUT <br />Type: <br />Interval: <br />SEAL <br />Type: Bentonite chips <br />Interval: 80' -85' <br />SANDY LEAN CLAY <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 />Type PVC Sch 40 0.01" <br />SANDSTONE Light 15 <br />::: <br />brown slightly moist <br />Interval: 89' -99' <br />sandstone. <br />20 <br />COAL Black, slightly <br />moist fractured and 25 <br />friable coal. <br />Drilled hole to 100', finished 17:15 on 6/19. Began setting standpipe on <br />x x <br />6/20. Using 6" point at end. <br />SILTSTONE Light <br />x x <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: X 75.28 ft <br />Drilling Method: HSA/CORE <br />BS BENTONITE SEAL <br />® FP FILTER PACK <br />CEMENT GROUT <br />DATE: 09 -21 -2009 <br />Coordinates <br />TSC TOP OF SCREEN <br />TIME- 00:00 <br />North: 402650.2 <br />® CUTTINGS / BACKFILL BSC BOTTOM OF SCREEN <br />East: 1450672.6 <br />TD TOTAL DEPTH <br />IC SudwlUduUll IIIICS I WItIbUIn dPPIUNIndLU UUUDUdneS. I ne Iransnion may De gradual. <br />