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= Barr Engineering Company LOG OF PIEZOMETER <br />(Reference Boring No. B -5) <br />BARR <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. 6573.97 <br />Top of Casing Elevation: <br />STRATA <br />PIEZOMETER <br />= <br />o <br />PIEZOMETER CONSTRUCTION DETAILS <br />m <br />DETAILS <br />w <br />FOR <br />DESCRIPTION a. x <br />o v <br />> <br />° <br />W <br />VIBRATING -WIRE SENSOR WITH SAND PACK <br />TPc <br />PROTECTIVE CASING <br />Diameter. 6" <br />Type: 6" square 5' long <br />Interval: 36.5" to - 23.5" <br />CLAY (CL -CH) 0 <br />Medium -dark brown <br />slightly mast clay with <br />3.34" <br />sand, gravel and <br />occasional cobbles. <br />1" PVC <br />5 <br />GROUT <br />Type: Portland & bentonite gel <br />Interval: 0' -25' <br />SANDSTONE Medium <br />brown very fine grain <br />sandstone (cobble ?). <br />SEAL <br />Type <br />Interval: <br />10 <br />CLAY (CL -CH) <br />SANDPACK <br />Medium -dark brown <br />slightly moist clay with <br />Type: <br />sand, gravel and <br />Interval. <br />occasional cobbles. <br />13.0 <br />1 TVT 16560.97 <br />; ; <br />VIBRATING -WIRE TIP <br />14.0 <br />6559.97 <br />SANDSTONE Medium <br />brown very fine grained <br />; : <br />x <br />Diameter. 0.75" <br />sandstone with wavey 15 <br />Type. Slope Indicator <br />x <br />sub - horizontal bedding <br />x x <br />Serial No.: 99450 <br />SILTSTONE <br />x x <br />Brown /grey siltstone <br />x x <br />with wavey and planar <br />x x <br />bedding. <br />x <br />SHALE Brown /grey <br />shale. <br />20 <br />SILTSTONE Grey with <br />x x <br />red and orange mottling <br />x x <br />siltstone grading toward <br />x x <br />shale at depth. <br />x x <br />x x <br />x x <br />x x <br />x x <br />x x <br />x x <br />25.0 <br />TD <br />6548.97 <br />25 <br />Piezo was attached to 1" PVC to ensure the deepest possible installation <br />within the auger portion of the hole. <br />Completion Depth: 25.0 <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 />BS BENTONITE SEAL <br />® BENTONITE <br />WATER LEVEL: T DRY ft <br />Drilling Method: HSA/CORE <br />FP FILTER PACK <br />® CEMENT GROUT TVT TOP VIBRATING -WIRE TIP <br />DATE: 09 -21 -2009 <br />Coordinates <br />North: 402021.4 <br />BVT BOTTOM VIBRATING -WIRE TIP <br />® CUTTINGS / BACKFILL TD TOTAL DEPTH <br />TIME 00 00 <br />East: 1450882.6 <br />I he stratification lines represent apprwamate boundaries. The transition may be gradual. <br />