2008-10-08_REVISION - M2006080 (7)

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DAILY FIELD REPORT Project Loveland Ready Mix Slurry Wall Report No. 19 Location Larimer County, Colorado Date 3 April 2008 Client Compass Environmental, Inc. Page 1 of 1 Contractor Compass Environmental, Inc. File No. 107021-001 Weather Partly Cloudy / Sunny Temperature 50's F 1. CONTRACTOR'S ACTIVITIES: Contractor Start Work 0700 hrs Contractor Stop Work 1700 hrs Top of Backfill Slope at Start 36+50 - _ ?- ^- _-_ To of Backfill Slope at Stop 36+40 Toe of Backfill Slope at Start 36+70 Toe of Backfill Slope at Stop 36+80 Last Completed Set at Start 36+90 Last Completed Set at Stop 37+10 Verified Area of Excavated Alluvium above Key (Daily) 0 S q. Ft. Verified Area of Excavated Bedrock. (Cumulative) 11.955 S q. Ft. Total Area Excavated To Date 26, 540 Sq. Ft. Excavator Type Komatsu PC800 Fresh Slurry Made Yes FIELD REPRESENTATIVE'S ACTIVITIES: Quality Control Number of Samples Location or Batch # Comments Bentonite Slurry - As-Mixed 1 36+50 Bentonite Slurry - In Trench 1 37+10 Excavator bucket broke before 2" test Backfill (Slump, Density) 1 36+50 No backfill mixed in AM. Backfill (Gradation) 1 36+50 Results to be reported in weekly summary Backfill (Permeability) -- -- Next Permeability will be taken around 40+00 Verified Clean AM Backfill Slope and Bottom of Key Yes 36+70 through 36+90 Trench cleaned to bottom of key prior to next excavation set. Verified Depth To Bedrock and Key Yes -- No Excavation took place ' 1. Observed test pit excavated at STA 39+50, 40 ft. O.C., 8 ft deep. GS observed very slow (<1 gal) water charge -8 ft down and rising, but pit was closed prior to equilibrium of water table. Three new test pits were excavated at the end of the day at STA 60+00, 70+00, and 39+50. All three were excavated between 8 ft and 10 ft deep through clayey overburden down to sandy/gravel stratum. 2. Al of Compass informs GS of silty mud/muck excavated from irrigation ditch adjacent to and on proposed centerline of slurry wall excavation between STA 38+50 4 39+50. Silty mud/muck was excavated approximately 4 ft to 5 ft deep and 4 ft wide and then backfilled with clayey overburden for stability of ' excavator. 3. 1415 hrs, excavator bucket shank broke, excavation activities halted until repair. 4. Square footage from set completed on this date documented as part of square footage on 4/4/08. 5. Prepared Daily Field Report and updated slurry wall data spreadsheet. ATTACHMENTS: None ' Field Representative(s) Time on/off site Total Greg Snyder 0700/1700 10.0 ' Distribution: Jeff Sallas; file