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BRIERLEY DAILY FIELD REPORT I <br /> ASSOCIATES <br /> Cmtinp Space Undergtmm0 <br /> Project Hokestra-North Slurry Wall Report No. 6 <br /> Location Firestone, CO Date Wednesday, May 01, 2013 ' <br /> Client Hall-Irwin Page 3 of 4 <br /> Contractor Hall-Irwin File No. 112206-000 <br /> Weather Windy with Snow Showers Temperature Very Cold(0°-32°) ' <br /> 2. Both AM&PM profiles were observed and/or recorded. See attached AM/PM comparison chart for <br /> further details. <br /> 3. Performed quality control testing on fresh slurry, trench slurry, import material, and soil-bentonite , <br /> backfill. <br /> 4. Slurry level did not drop below 2ft of surface grade during excavation. , <br /> 5. The de-sanding machine was in operation intermittently throughout the shift. <br /> 6. The Komatsu DX65 dozer used in the backfilling operation was not working during this shift, and is ' <br /> currently under maintenance for an overheating problem. <br /> 7. HI is keeping the toe of the backfill slope within 30±5 feet of the excavation to allow them to clean out <br /> the key and help prevent sand settling in the slurry wall key. <br /> 8. Set Summaries: ' <br /> [8+85-->9+20] Start: 8:30 am(19ft)Finish:9:15 am(23ft) <br /> Top of Rock:gray/dark gray,medium soft,fresh,blocky,slightly silty,sandy CLAYSTONE. ' <br /> [9+20--*9+55] Start: 10:00am(19ft)Finish: 11:00 am(23ft) <br /> Top of Rock:gray/dark gray,soft,fresh,blocky,sandy CLAYSTONE. <br /> [9+55—*9+90] Start: 11:30am(17ft)Finish: 12:30 pm(21ft) , <br /> Top of Rock:gray/dark gray,soft,fresh,planer,sandy CLAYSTONE. <br /> [9+90--�10+25] Start:2:33pm(17ft)Finish: 3:00 pm(21ft) ' <br /> Top of Rock:gray/dark gray,soft,fresh,blocky,slightly sandy,silty CLAYSTONE. <br /> [10+25--+10+60] Start:3:57pm(19ft)Finish:4:45 pm(23ft) <br /> Top of Rock:gray/dark gray,soft,fresh,blocky,slightly silty,sandy CLAYSTONE. <br /> 9. PM profile was performed by Luis and Jesus(HI)after RY left the jobsite. <br /> ATTACHMENTS: <br /> Field Representative(s) Time on/off site Total ' <br /> Ryan Young 9:30 AM 5:00 PM 7.5 hrs <br /> Distribution: Ruben Hernandez; file <br /> C:\Documents and Settings\ksisnroy\Desktop\DFR's\DFR 4-30-13.5.docx Brierley Associates ' <br />