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- Barr Engineering Company LOG OF PIEZOMETER <br />BARR (Reference Boring No. B -7) <br />Sheet 1 of 1 <br />Location: West Elk Mine, Somerset, <br />client- Mountain Coal Company <br />CO <br />Barr Project Number: 06/261003 <br />Surface Elevation: 6893.35 <br />Top of Casing Elevation: 0.00 <br />STRATA <br />PIEZOMETER <br />DETAILS <br />= <br />Q � <br />° <br />o <br />< 42 <br />W <br />PIEZOMETER CONSTRUCTION DETAILS <br />FOR <br />STANDPIPE PIEZOMETER <br />r <br />DESCRIPTION o_ r <br />o — <br />m <br />co <br />PROTECTIVE CASING <br />Diameter: 6" <br />Type: Steel round 5' long <br />0 <br />CLAY (CL -CH) Medium <br />Interval: 31" to -29" <br />brown slightly moist clay <br />with silt, sand and <br />gravel. Trace roots. <br />2.0 <br />16891.35 <br />RISER CASING <br />Diameter: 2" <br />Type: PVC Sch 40 <br />Interval <br />5 <br />GROUT <br />Type- Portland <br />Interval: 0' -2' <br />SEAL <br />9.0 <br />BS <br />6884.35 <br />Type- Bentonite chips <br />Interval: 2' -9' <br />12.5 <br />TSC <br />6880.85 <br />SANDPACK <br />Type: Silica sand 10 -20 <br />Interval- 9' -25' <br />10 <br />SILTY SAND (SM) Light <br />tan - medium brown <br />slightly mast silty sand <br />with dark brown moist <br />:: <br />sand at depth. <br />SANDSTONE Light <br />SCREEN <br />grey fine - medium <br />grained sandstone. 15 <br />; : <br />Diameter: 2" <br />Type PVC Sch 40 0.01" <br />SANDSTONE <br />Grey /brown <br />Interval- 12.5' -22.5' <br />fine- medium grained <br />sandstone. <br />SANDSTONE Grey <br />fine - medium grained <br />sandstone. <br />SANDSTONE Tan -gre 20 <br />; <br />sandstone. <br />SANDSTONE Tan <br />sandstone. Trace coal <br />22.5 <br />BSC <br />6870.85 <br />dust. <br />SILTSTONE Tan -dark <br />x x <br />brown siltstone. Minor <br />x x <br />coal in seams. 25 <br />x x <br />25.0 <br />TD <br />6868.35 <br />Water level @ 15' after drilling, during set. 06123/09 end of day, sand pack <br />to 12' bgs. <br />Completion Depth: 25.0 <br />Date Started: 6/23/09 <br />Date Completed: 6/23/09 <br />Logged By: BSE <br />Drilling Contractor: Haztech <br />Drilling Method: HSA/CORE <br />Coordinates <br />North: 401415.5 <br />LEGEND TPC TOP OF PROTECTIVE CASING <br />TRC TOP OF RISER CASING <br />El FILTER PACK BC BASE PROTECTIVE CASING <br />GS GROUND SURFACE <br />■ BENTONITE BS BENTONITE SEAL <br />®CEMENT GROUT FP FILTER PACK <br />TSC TOP OF SCREEN <br />® CUTTINGS / BACKFILL BSC BOTTOM OF SCREEN <br />WATER LEVELS <br />WATER LEVEL: I DRY ft <br />DATE: 09 -21 -2009 <br />TIME: 00.00 <br />East: 1451292.6 <br />TD TOTAL DEPTH <br />The stratification lines represent appropmate boundaries. The transition may be gradual. <br />