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treatment without the confusion and clutter of the other facilities. An update of Map 16 or a schematic <br />drawing that clearly illustrates only the key features regarding mine water handling and treatment. <br />Direction of flow and amount of discharge would be helpful to include in order to illustrate the water <br />handling system. <br />TCC provided the Division with an updated Map 16 via e-mail on October 22, 2008. No hard copy <br />was received. After review of Map 16 the Division has additional questions regarding Map 16 and the <br />water handling system. <br />3. Permit text discussion of flow directions on some of the sections of pipeline, both existing and <br />proposed are somewhat confusing. Some sections seem to have the ability to carry flow in both <br />directions. Please provide a map, as requested in #2 above and provide minor text edits to resolve <br />questions on flow direction through the waterline system. <br />TCC provided a map and revised portions of the text. However, the Division has additional questions <br />as a result of review of Map 16 and the revised text descriptions. <br />4. The applicable standards for Region 12, Yampa River are shown on current tables provided through <br />the Water Quality Control Division web site. The two segments of interest are 13f on Trout Creek <br />from the confluence with Fish Creek to the Yampa River, and segment 13c, from the confluence with <br />Fish Creek upstream to a point closer to the Edna Mine. Both of these segments have a "WS" <br />designation for sulfate, meaning "water supply". The "WS" abbreviation means that the less <br />restrictive of ambient quality on January 1, 2000 or sulfate of 250 mg1l shall be the applicable in- <br />stream standard. However, for all surface waters with a "water supply" classification that are not in <br />actual use as a water supply, no water supply standards are applied for iron, manganese, and sulfate, <br />unless the Commission determines as a result of a site-specific rulemaking hearing that such <br />standards are appropriate. TC has provided documentation in the form of agreements with the one <br />and only domestic water user downstream on Trout Creek. Based on this agreement, TCC reports that <br />there are no domestic water users on either of these segments downstream of TCC's mine water <br />discharge. <br />5. <br />No Response is necessary at this time. <br />6. Page 2.05-87 was submitted with no changes, but it should be renumbered 2.05-88 to insert correctly. <br />TCC revised the page number on page 2.05-88. This response is acceptable. <br />New questions follow as a result of the Division's review of TCC's October 21 st and 22nd responses: <br />7. Please assure that all waterlines, sumps, and borehole/ventshaft have one unique name that is used <br />consistently throughout text and Maps. There are discrepancies between Map 16 and the revised Mine <br />Water Handling text descriptions. Primarily there is a lack of consistency in names. Specifically; <br />b. Revised page 2.05-?? discusses the Fish Creek Vent Shaft, yet Map 16 label the structure <br />"sealed ventilation shaft." Please use consistent names between text and Map.