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amec <br />Earth & Environmental <br />D) Overburden to Stockpile <br />1) VLF <br />Oversize rock within the Phase 5 VLF fill area was removed from fill areas and hauled to the <br />overburden stockpile area east of the east perimeter road near stations A28+00 (+/-) to A36+00 <br />E) Cut to Fill <br />1) VLF <br />A CAT 385 excavator and a John Deere 850 excavator were used to excavate structural fill <br />material from the following areas: between stations F5+00 (+/-) and F7+50 (+/-), <br />approximately 50 to 100 feet right of centerline; between stations H4+00 (+/-) and H10+50 <br />(+/-), approximately 20 to 100 feet left of centerline; between stations; H24+00 (+/-) and <br />H26+00 (+/-), approximately 75 to 100 feet right of centerline; and between stations K11+00 <br />(+/-) and K13+00 (+/-), approximately 20 to 100 feet right of centerline. The structural fill <br />material was loaded into CAT 777 haul trucks and hauled to fill areas. <br />Prior to structural fill placement existing fill areas were ripped and frost was allowed to thaw <br />or was removed. Existing fill temperature were monitored and found to be above 32°F before <br />fill placement. An AMEC representative monitored ambient temperatures on an hourly basis <br />during fill placement. Fill temperatures were monitored during ambient temperatures below <br />32°F and ranged between 33°F to 39eF. <br />Structural fill was placed in the following areas: between stations C0+50 (+/-) and C3+00 (+/-), <br />approximately 75 feet left of centerline to 75 feet right of centerline; between stations F7+50 <br />(+/-) and F12+50 (+/-), approximately 120 feet left of centerline to 30 feet right of centerline; <br />and between stations J8+00 (+/-) and J14+00 (+/-), approximately 50 to 200 feet right of <br />centerline. Structural fill was placed in 18" to 24" lifts using various CAT dozers. Each lift was <br />moisture conditioned using a CAT 773 water truck (when necessary) and compacted using a <br />10-ton vibratory smooth drum compactor, passing over the entire fill surface at least 4 times <br />(method compaction technique is applicable). Ambient and fill temperatures were monitored <br />and recorded during fill placement. <br />Blast pattern drilling was performed between stations H4+00 (+/-) and H10+00 (+/-), <br />approximately 20 to 90 feet left of centerline. Blasting was performed on Monday (3/29/2010), <br />Tuesday (3/30/2010) and Friday (4/2/2010). No blasting was performed Wednesday <br />(3/31/2010), Thursday (4/1/2010) and Saturday (4/3/2010). <br />F) Material Processing <br />1) East Cresson Clay Borrow Area <br />Processing of Soil Liner Fill material continued this week. A CAT D-8 dozer, a CAT 320 <br />excavator, a CAT 966 front-end loader, and tandem-axel haul trucks were used to excavate, haul, <br />and process the material. The processing plant went down Tuesday (3/16/2010) due to mechanical <br />problems. <br />VLF Weekly Report WE 04.03.10.D.doc