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BRIERLEY DAILY FIELD REPORT <br /> ASSOCIATES , <br /> Cr a"ipme Unewyfouna <br /> Project Hokestra-North Slurry Wall Report No. 2 <br /> Location Firestone, CO Date Thursday, April 25, 2013 ' <br /> Client Hall-Irwin Page 3 of 4 <br /> Contractor Hall-Irwin File No. 112206-000 <br /> Weather Sunny Temperature Cool(45°-60°) ' <br /> 3. Performed quality control testing on fresh slurry, trench slurry, and soil-bentonite backfill. <br /> 4. Slurry level did not drop below 2ft of surface grade during excavation. ' <br /> 5. The de-sanding machine was not in operation during this shift. <br /> 6. HI was not able to keep the toe of the backfill slope within 30±5 feet of the excavation because of the 90 , <br /> degree turn near station 2+80. <br /> 7. Sample of soil-bentonite backfill that was collected on 4/24/13 was sent to Knight Piesold for triaxial , <br /> permeability testing. Results will be sent to Benny Siljenberg. <br /> 8. Set Summaries: <br /> [1+75-2+15] Start: 8:16 am(22ft)Finish:9:00 am(26ft) <br /> Top of Rock:gray/dark gray,soft,fresh,silty,CLAYSTONE. <br /> [2+15-->2+55] Start:9:25 am(21ft)Finish: 10:03 am(25ft) , <br /> Top of Rock:gray/dark gray,soft,fresh,silty,CLAYSTONE. <br /> [2+55--*2+90] Start: 10:42 am(20ft)Finish: 11:33 am(24ft) ' <br /> Top of Rock:gray/dark gray,soft,fresh,silty,CLAYSTONE. <br /> [2+90--6+25] Start: 1:05 pm(21ft)Finish: 1:50 pm(25ft) ' <br /> Top of Rock:gray/dark gray,soft,fresh,silty CLAYSTONE. <br /> [3+25—*3+60] Start:3:30 pm(19ft)Finish:Incomplete <br /> Top of Rock:gray/dark gray,soft,fresh,silty CLAYSTONE , <br /> 9. PM profile was performed by Alonzo and Jesus(HI) with RY observing. <br /> ATTACHMENTS: ' <br /> Field Representative(s) Time on/off site Total ' <br /> Ryan Young 7:00 AM 5:00 PM 10.0 hrs <br /> Distribution: Ruben Hernandez; file <br /> c.. ' <br /> C:\Documents and Settings\ksisnroy\Desktop\TEMPLATES\DFR 4-25- Brierley Associates ' <br /> 13.2.docx <br />