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DAILY FIELD REPORT <br />Project Loveland Ready Mix Slurry Wall Report No. 21 <br />Location Larimer County, Colorado Date 5 April 2008 <br />Client Compass Environmental, Inc. Page 1 of 2 <br />Contractor Compass Environmental, Inc. File No. 107021-001 <br />Weather Partly Cloudy / Sunny Temperature 60's F <br />1. CONTRACTOR'S ACTIVITIES: <br />Contractor Start Work 0700 hrs <br />Contractor Stop Work 1500 hrs <br />Top of Backfill Slope at Start 36+40 <br />To of Backfill Slope at Stop 36+50 <br />Toe of Backfill Slope at Start 37+50 <br />Toe of Backfill Slope at Stop 38+10 <br />Last Completed Set at Start 37+40 <br />Last Completed Set at Stop 38+10 <br />Verified Area of Excavated Alluvium and Bedrock (Dail) _2,640 Sq. Ft. <br />Total Area Excavated To Date 31,140 S q. Ft. <br />Excavator Type Komatsu PC800 <br />Fresh Slurry Made Yes <br />FIELD REPRESENTATIVE'S ACTIVITIES: <br />Quality Control Number of <br />Samples Location or Batch # Comments <br />Bentonite Slurry - As-Mixed 1 36+50 Fail spec, retested with Compass <br />Environmental ass after corrections made. <br />Bentonite Slurry - In Trench 2 37+40 <br />Backfill (Slump, Density) 1 36+40 No backfill mixed/ laced in PM <br />Backfill (Gradation) 1 36+40 <br />Backfill (Permeability) -- -- Next Permeability will be taken around 40+00 <br />Verified Clean AM Backfill <br />Sloe and Bottom of Key Yes 36+40 through 37+40 Trench cleaned to bottom of key prior to next <br />excavation set. <br />Verified Depth To Bedrock <br />and Key Yes 37+40 to 38+10 <br />1. GS recorded water level below ground surface at STAB 60+00, 70+00, and 39+50. All three were excavated between 8 ft <br />and 10 ft deep through clayey overburden down to sandy/gravel stratum. <br />Ground water results as recorded from ground surface: <br />39+50: - 8 ft <br />60+00: - 6.5 ft <br />70+00: -9 ft <br />2. Performed quality control testing on slurry and backfill. Observed backfill and excavation operations. As-Mixed slurry <br />viscosity test yielded a failing test result of 36 seconds. GS informed Compass of failing test. Corrective action was <br />taken. Retest yielded a viscosity of 41 seconds and a weight of 65 pcf. Other tests performed yielded results in general <br />accordance with project specifications. Test results were reported to AI of Compass. <br />3. Prepared Daily Field Report and updated slurry wall data spreadsheet. <br />ATTACHMENTS: None <br />Field Representative(s) Time on/off site <br />Greg Snyder 0730/1500 <br />Total <br />7.5 <br />Distribution: Jeff Sallas; file