2011-09-09_REVISION - M1981185 (43)

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Mr. Wallace H. Erickson Response to Fifth Adequacy September 9, 2011 Page 12 DEN 97,599,531v1 9 -9 -11 • Construct stem wall and install steel sets pursuant to design approved under the Portal Collapse Repair Work Plan, Attachment D -2, through the Technical Revision or Amendment process; • Inspect concrete floor, stem wall and roof in mill building for cracks or leaks; • Perform engineering evaluation to develop conclusions and recommendations regarding: o Design criteria for sealing cracks or leaks in concrete floor, stem wall and roof of mill building. • Prepare a technical memorandum summarizing the results of the work described above; • Submit revised design plans for the mill building to address sealing of leaks or cracks in concrete floor, stem wall and roof, as necessary, through the Technical Revision or Amendment process; and, • After obtaining DRMS approval through the Technical Revision or Amendment process, proceed with remainder of work plan, perform scope of work to seal leaks or cracks in concrete floor, stem wall and roof, and obtain licensed professional engineer certification of mill building as Environmental Protection Facility. • Storage sheds, including Zircon or large shipping containers, in which designated chemicals are stored or utilized. o Wildcat has shown the zircon containers and gasoline and diesel storage tanks at the May Day No. 1 on maps at Exhibit U, Figure D -1 (Environmental Protection Plan); and, Attachment D -2, Figures D -1 (May Day No. 1 Surface Facilities) and D -2 (May Day No. 1 Portal Repair and Stormwater Control Plan). Wildcat is submitting revised maps showing zircon containers and gasoline and diesel storage tanks at the May Day No. 1. See Attachment 3 (Attachment D -2, Figure D -1 (May Day No. 1 Surface Facilities) and Attachment D -2, Figure D -2 (May Day No. 1 Portal Repair and Stormwater Control Plan)). There are six zircon containers at May Day No. 1. Wildcat has indicated on Attachment D -2, Figure D -1, that four of these zircon containers —the zircon container north of the mill building, the zircon containers east and west of the generator set, and the southern-most zircon container —do not contain toxic chemicals or acid forming materials, and therefore are not Environmental Protection Facilities. The two zircon containers immediately southwest of the mill building are designated GREENBERG TRAURIG, LLP • ATTORNEYS AT LAW • WWW.GTLAW.COM