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a <br />Adr% <br />ame <br />Earth & Environmental <br />II. Underground Working <br />A. Drilling <br />Rockbreakers has completed the drilling of conformation holes in the LOB Pad adjacent to <br />underground working 2019. A total of 14 holes were drilled to a depth of 50-feet. 2-drill <br />holes indicate a "void" between 10 and 16-feet and 24 to 31-feet. The holes are located 4- <br />feet from the open edge of the existing shaft. The additional 5 holes drilled on 4-foot <br />centers did not encounter any "voids". For underground working 2020, 7 drill holes <br />located on 4-foot centers at the edge of the proposed liner which resulted in no "voids" <br />found. Drill holes were advanced to a 50-foot depth. <br />B. Mine Shaft/Stope Remediation <br />Remediation work for underground working 2039 located within the planned conveyor <br />alignment 1. From conveyor transfer station 4, the working is located down slope. <br />Progress this week has been good with the transport of oversize rock from the LOB <br />Delivery Road blasting and rock from the VLF sediment pond. An additional 39 loads, <br />using Volvo haul trucks; of coarse shaft backfill has been transported to the site for <br />additional backfill. Based on "rough" measurements the contractor is close to elevation <br />9780, or the start of the geogrid as outlined in the remediation plan. All drill holes within <br />the Geomembrane lined area have been grouted with a mixture of 50# of bentonite to 50 <br />gallons of water. <br />Lateral/Slot Remediation <br />No work performed this week. <br />III. Stormwater Management Structures <br />A. LOB Stormwater Culverts <br />No work performed this week. <br />B. Roadside ditch <br />No work performed this week. <br />C. Best Management Practices (BMP) <br />No work performed this week. Existing silt fencing structures appear to be in good <br />condition. <br />IV. LOB Geosynthetics <br />A. LLDPE Geomembrane 80 and 100 mil LLDPE <br />Lone Star (Installer): Submittal is pending approval. Additional information is required. <br />The crew has completed MSHA training this week. Work will begin the following week <br />for the water storage pond (not part of contract). Additional required information for <br />approval will be obtained at that time. <br />Sheet 3 of 11 <br />LOB Weekly Report WE 04.04.09.13