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Poly-Flex continued deployment of 80-mil LLDPE geomembrane in the Phase IVa azea. Poly-Flex <br />deployed 80-mil single-sided textured LLDPE geomembrane over an azea of 298,459 square feet in <br />the Phase IVa azea during this reporting period. Geomembrane panels P370 through P470 were <br />deployed, seamed, and tested by Poly-Flex. Destructive fusion seam samples DF-133 through DF- <br />164, and extrusion seam samples DX-8 and DX-9 were marked, removed, and tested. <br />Ames continued placement of Drain Cover Fill (DCF) and haul road construction in the Phase IVa <br />area. The DCF was placed using CAT D6, D8, and D9 dozers. The DCF was placed on the floor and <br />slopes, advancing from north to south. <br />Ames began final grading of the Phase IVa diversion channel by grading subgrade according to <br />design drawings and placing 6-inches of low permeability channel lining fill. <br />Ames continued construction of the three (3) 42" CSP's for the VLF access road by placing the CSP's <br />and backfilling azound them. <br />Phase Nb <br />Ames continued placement of Structural Fill (SF) in the Phase IVb azea. Ames placed SF above the <br />Phase III diversion channel, at the old haul road below the substation, and at the western end of the <br />PSSA floor. Ames also continued slope recontouring in the Phase IVb azea on the northern PSSA <br />slope and on Chicken Hawk Hill. <br />Ames hauled oversize material from the Phase Nb azea to an uncontrolled fill site. <br />Ames performed confirmatory drilling activities associated with the Phase Nb construction area on <br />underground workings UG-493, the Ophir tunnel, UNK-I1, and UNK-16. <br />Ames performed excavation remediation activities for underground workings UG-215, UG-263, UG- <br />264a, UG-264b, UG-546, UNK-11, UNK-13, UNK-14, and UNK-16. These workings were observed <br />and verified to be "Shallow or Deep", as defined in the drawings, and will be remediated accordingly. <br />Ames conducted blast drilling of underground workings within Phase Nb at UG-215, UNK-15, and the <br />Ophir tunnel. Ames blasted underground workings delineated by confirmation drilling at UNK-15 on <br />July 29a' at 17:00, at UG-215 on July 3151 at 17:00, and at the Ophir tunnel on August 8a' at 17:00. <br />Ames resumed placement of Concrete Plug (CP) concrete into "Deep Shafts" UG-214, UG-215, and <br />UNK-I5. Ames placed three feet of concrete in accordance with IFC Drawing 12, Detail 1. <br />Ames resumed placement of Select Structural Fill (SSF) into "Shallow" workings at UNK-15. <br />Ames used Structural Fill to backfill "Shallow" working UNK-14. <br />Phe,e1Ve 59lu1y 25-Augus~l0.doc Golder Associates lnc. <br />