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amec-0 <br />Earth & Environmental <br />SLF material was hauled from the East Cresson Clay borrow area and stockpiled near stations <br />A28+00 (+/-), approximately 200 feet left of centerline. Material was hauled using CAT 777 <br />haul trucks loaded by a CAT 385 excavator. <br />G) PSSA Ore Slope Construction <br />1) VLF <br />Construction of the remaining portion of the PSSA ore slope continued between stations <br />G8+00 (+/-) and G16+00 (+/-), approximately 0 to 225 feet left of centerline using a CAT D-6 <br />LGP dozer and a CAT 279 skid steer loader. Existing ore was pushed over the previously <br />certified secondary geomembrane, constructing the toe of the slope (if applicable). Geotextile <br />was placed over any geomembrane within three feet of the slope toe. A 10-ton smooth drum <br />roller was used to compact the surface of the ore slope 2' or more above the geomembrane and <br />a plate compactor was used to compact the remaining portion of the slope. <br />H) Low Volume Collection System <br />1) Low Volume Solution Collection Piping <br />Placement of the low volume solution collection system continued at the LVSCF placement <br />area shown in Figure 6, advancing in front of the placement. Four-inch CPeP was placed and <br />sandbagged in accordance with design drawings, constructing the mainline and the tertiary <br />lines. The secondary geomembrane in the area was accepted prior to pipe placement. <br />2) Low Volume Solution Collection Fill (LVSCF) <br />Low volume solution collection fill (LVSCF) material placement within the Phase 5 VLF <br />continued. LVSCF was placed in the area show in Figure 6. The LVSCF was hauled from the <br />processing area to the placement area using CAT 740 haul trucks loaded by a 988 front-end <br />loader. The LVSCF was placed in a 3-foot lift using two CAT D-6 LGP dozers, a CAT D-7 <br />LGP dozer, and a CAT D-8 LGP dozer, expect were haul routes were established. Haul route <br />consisted in five-foot lifts, to be spread into 3-foot lifts later. Laborers were present at all times <br />during placement holding the low volume solution collection piping in place, removing <br />debris/sandbags, and assisting the dozer operator with lift thickness. All LVSCF was placed on <br />previously approved secondary geomembrane. AMEC field representatives observed <br />placement constantly during the shift. <br />I) Underdrain Construction <br />1) Secondary Underdrain Construction <br />Construction of the Secondary Underdrain was performed using a CAT 330 excavator to <br />excavate the trench. Underdrain construction was performed from the tie-in to the Primary <br />Underdrain at station 18+40, up the slope, stopping above the 9775' elevation (above PSSA). <br />Subgrade and trench dimensions were inspected by an AMEC field representative and found to <br />be constructed in accordance with design drawings and project specifications. 10 oz. /yd2 <br />geotextile was placed in the trench. Underdrain fill material was then placed in the trench and <br />the geotextile was wrapped around the material, overlapping 1-foot. Six to eight inches of <br />select structural fill was placed and compacted above the geotextile. The remaining portion of <br />the trench was then backfilled with structural fill. <br />VLF Weekly Report WE 06.19.10.1)