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L"11 =M <br />Grouting of "miss" (non -void) confirmatory drill holes was performed at Underground Working <br />#4073. A grout pump and laborers were used to place bentonite grout into the "miss" drill holes. <br />C) Remediation <br />A John Deere 850 excavator was used to excavate the blasted material from Underground <br />Working #4007. The working was excavated to the limits of the excavator. Backfilling was then <br />performed with coarse shaft backfill. Due to access, the material as placed in small lifts and <br />bucket tamped using the excavator. This was performed preparing for geogrid placement and <br />activities were observed by an AMEC field representative. <br />A concrete plug was placed at Underground Working #4008 (Morning Glory). Approximately 40 <br />cubic yards of approved concrete from Transit Mix was placed in the previously approved plug, <br />shaped in the shaft. The concrete placement was observed by an AMEC field representative. <br />Remediation of Underground Working #4024 was performed placing the concrete plug in the <br />working. Seven feet of cemented rock fill was placed on top of the previously placed concrete. An <br />AMEC field representative observed cemented rock fill. <br />Remediation of Underground Working #4025 was performed placing the concrete plug in the <br />working. Seven feet of cemented rock fill was placed on top of the previously placed concrete. An <br />AMEC field representative observed cemented rock fill. <br />Remediation of Underground Working #4044 was performed placing the concrete plug in the <br />working. Seven feet of cemented rock fill was placed on top of the previously placed concrete. An <br />AMEC field representative observed cemented rock fill. <br />A concrete plug was placed at Underground Working #4071. Approximately thirty cubic yards of <br />approved concrete from Transit Mix was placed in the previously approved plug, shaped in the <br />shaft. The concrete placement was observed by an AMEC field representative. <br />Testing of the concrete was performed by an AMEC field representative. Slump, air entrainment, <br />temperature testing was performed with results passing. One set of nine 4 "x 8" cylinders were <br />cast for laboratory compressive strength testing. <br />D) Structures <br />No work performed during the week. <br />III) Geosynthetics <br />A) Geomembrane Installation <br />No work performed during the week. <br />B) Anchor Trench <br />No work performed during the week. <br />Q Geomembrane Exposure <br />No work performed during the week. <br />D) Geomembrane Acceptance <br />No work performed during the week. <br />MEW Weekly Report WE 04.07.2012 <br />