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geomembrane deployment. <br />Ames continued construction of the Phase Na Primary Underdrain (PU) through the central portion of <br />Phase IVa. Ames excavated trench placed geotextile and UF, completing the construction of the Phase <br />fVa PU. Ames resumed construction of the Phase IVa PU sump by placing 4" by 4" steel mesh and six <br />inches of CIP concrete. <br />Ames continued to remove Drain Cover Fill (DCF) from the edge of Phase I along the Phase I/Phase <br />Na tie-in in preparation for geomembrane deployment. <br />Ames continued to excavate and backfill the geomembrane anchor trench. Ames excavated a three foot <br />deep by two feet wide trench and backfilled the trench using approved material over installed <br />geomembrane. <br />Ames began excavation and constnrctionof the Phase fVa LDT on May 22"d. Ames excavated a 1~' by <br />I' trench, placed 40-mil LLDPE liner, placed 12 oz geotextile, and placed Leak Detection Fill. At <br />geomembrane spliced Ames had POLYFLEX extrusion weld the seam. <br />POLYFLEX continued to receive 80-mil geomembrane for Phase fVa geomembrane deployment <br />POLYFLEX continued deployment of 80-mil LLDPE geomembrane. POLYFLEX deployed 80-mil <br />single-sided textured LLDPE geomembrane over an azea of 189,153 sf during this reporting period. <br />Geomembrane panel P-33 through P-84 were deployed, seamed, and tested by POLI'FLEX. <br />Destructive seam samples DF-11 through DF-30 and DX-1 and DX-2 were mazked, removed, and <br />tested. <br />Ames did not perform confirmation drilling in the Phase fVa area during this reporting period <br />Phase IVb <br />Ames continued Structural Fill (SF) placement and compaction activities at the 9640 road between <br />station 2+00 and 8+00, neaz UG-253, and at the PSSA 2H:1 V slope. Structural Fill materials were <br />placed in horizontal lifts typically not exceeding 2 feet in loose thickness. A Caterpillaz CS563C roller <br />provided compactive effort, while a Caterpillaz water wagon provided moisture conditioning when <br />needed. Ames conducted slope recontouring activities at the PSSA sump area. Ames continued <br />recontouring the Phase III ore slope on the South side ofthe Phase fV PSSA in prepazation for Bedding <br />Fill placement. <br />Ames performed confirmatory drilling activities associated with the Phase IVb construction azea on <br />known underground working UG-263. <br />Ames placed Cemented Rockfill (CR) at UG-204 and UG-206 by tapering the working and placing 7 <br />feet of CR in accordance with IFC Drawing 12, Detail 1. <br />Ames constructed a geogrid cap over UG-206. Ames placed two layers of geogrid in accordance with <br />the drawings and specifications. <br />Pha¢IVa 54 May19JUnel don Golder Associates lnc. <br />