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Rule 4.05.2 - Water Quality Standards and Effluent Limitations <br />4. Please provide text on page Exh-8-238 that states that the sediment control for the Terror Creek <br />vent shaft pad is a small area exemption and provide on that page and on Map 42 the number of <br />the SAE designation. <br />5. On page Exh-8-243, a tie back distance of 125 feet is used in the Sedcad design for the silt <br />fence. However, this tie back distance is not shown on Map 42. Although a berm is in place so <br />that runoff does not go around the silt fence, the berm would obviously not act the same as a <br />silt fence in passing water through while filtering out sediment. Please explain the use of the tie <br />back distance. <br />6. The Sedcad design for TR-67 assumes that there will not be any runoff from the upland area <br />due to the heavy oak brush cover. Based on a field inspection of the site by the Division, this <br />appears to be a reasonable assumption. However, if evidence becomes available that enough <br />upland area runoff is finding its way to the shaft pad, BRL will need to design and construct an <br />appropriate upland diversion. <br />Rule 4.07 - Sealing of Drilled Holes and Underground Openings <br />7. Rule 4.07 requires that all drilled holes and underground openings be permanently sealed. <br />Please add detailed plans to the permit application describing how the shaft will be permanently <br />sealed when it is no longer needed. <br />Sincerely, <br />Joseph J. D ash <br />Environmental Protection Specialist <br />Attachments <br />cc: Jim Stover P.E. (J.E. Stover & Associates) with attachments <br />c:/word2007/bowie2/tr67adeq 1