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= Barr Engineering Company LOG OF PIEZOMETER <br />(Reference Boring No. B -1) <br />BARR <br />Sheet 1 of 3 <br />Location: West Elk Mine, Somerset, <br />Client: Mountain Coal Company <br />CO <br />Barr Project Number: 06/261003 <br />Surface Elevation: 6192.24 <br />Top of Casing Elevation <br />STRATA <br />PIEZOMETER <br />= <br />o <br />PIEZOMETER CONSTRUCTION DETAILS <br />COO <br />DETAILS <br />w r <br />� <br />FOR <br />DESCRIPTION o_ <br />W . <br />} <br />o <br />w <br />J <br />VIBRATING -WIRE SENSOR WITH SAND PACK <br />(n <br />W <br />PROTECTIVE CASING <br />Diameter. 6" <br />Type. Steel round 5' long <br />Interval- <br />0 <br />CLAY (CL -CH) <br />Light -dark grey slightly <br />moist clay with sand, <br />1 <br />gravel and roots. Black <br />carbonaceous zones. <br />1 " PVC <br />5 <br />GROUT <br />Type: Portland & max gel <br />Interval: 0' -75' <br />SEAL <br />Type. <br />Interval: <br />SANDPACK <br />CLAY (CL -CH) 10 <br />Medium -dark brown <br />moist clay with silt, sand <br />Type: <br />and sandstone/granite <br />Interval: <br />gravel. <br />VIBRATING -WIRE TIP <br />Diameter- 0.75" <br />15 <br />Type: Slope Indicator <br />Serial No. 99454 <br />WELL GRADED SAND <br />(SW) Brownish -red <br />slightly moist sand with <br />17.0 <br />TVT <br />6175.24 <br />18.0 <br />16174.24 <br />dark grey lenses. <br />LEAN CLAY (CL) <br />Medium brown /grey <br />slightly moist lean clay <br />with red and orange cla 20 <br />inclusions. <br />SILTY SAND WITH <br />GRAVEL (SM) Light <br />brown very fine grained <br />slightly moist silty sand <br />with red sandstone <br />gravel. <br />SANDSTONE Red and 25 <br />tan /grey sandstone. <br />Completion Depth: 75.0 <br />Date Started: 6/25/09 <br />LEGEND TPC TOP OF PROTECTIVE CASING <br />Date Completed: 6/25/09 <br />BC BASE PROTECTIVE CASING <br />WATER LEVELS <br />Logged By: BWL <br />El FILTER PACK GS GROUND SURFACE <br />Drilling Contractor: Haztech <br />® BENTONITE BS BENTONITE SEAL <br />WATER LEVEL: -T DRY ft <br />Drilling ethod HSA/CORE <br />9 <br />FP FILTER PACK <br />® CEMENT GROUT TVT TOP VIBRATING -WIRE TIP <br />DATE: 09 -21 -2009 <br />Coordinates <br />North: 403263.5 <br />BVT BOTTOM VIBRATING -WIRE TIP <br />® CUTTINGS / BACKFILL TD TOTAL DEPTH <br />TIME: 0000 <br />East: 1450468.5 <br />the stratification lines represent appropmate boundaries. The transition may be gradual. <br />