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Lewicki & Associates 22 -Jul -2013 <br />C- 2010 -089 / TR -04 / PAR -1 Page 2 of 2 <br />b. Additionally, the Division has noted a number of other updates / corrections that <br />should be made to the TOC. These are noted on the attached copy, for your <br />reference. <br />2. New Appendix 2.05.3(4) -7 has been provided with this application. The Division notes <br />that throughout this Appendix, nomenclature used to identify the ditches is inconsistent <br />with that used in the Arcadis design report of Appendix 2.05.3(4) -1. In the Arcadis <br />design, and throughout the approved permit text and maps, the ditches are named "NHN- <br />001 West" and "NHN -001 East ". The new text and maps refer instead to "Pond 001 <br />Ditches" or "Pond NHN -001 Ditches ". Please modify the various texts and maps <br />submitted with this application to be consistent with the nomenclature already established <br />for these features. <br />3. The new Appendix provides an analysis of the ditches that were constructed. However, <br />the narrative does not refer back to the original approved design, and fails to describe <br />why significant modifications to the ditch geometry (triangular versus trapezoidal) were <br />instituted during construction. <br />4. The as -built designs refer to segments of ditch having been lined with 3" and 6" riprap. <br />During numerous site inspections, Division personnel have not observed that riprap of <br />any size has been used to armor the NHN -001 East and West collection ditches. Please <br />revise the application to accurately portray and evaluate the armoring system used for <br />certain segments of these ditches. <br />5. Map 2.05.3(4) -8 illustrates typical cross sections of the ditches, but neither this map nor <br />the narrative provides the required depth and width for the ditches and half - culvert. <br />Please incorporate width and depth information, by ditch segment, into the permit. <br />This concludes the Division's adequacy review for TR -04. Please respond to the items listed at <br />your earliest convenience. <br />Sincerely, <br />Marcia L. Talvitie, P.E. <br />Environmental Protection Specialist <br />Enclosure (1) <br />cc: Doug White, Western Fuels Association (Email) <br />Ross Gubka, Western Fuels- Colorado (Email) <br />Greg Lewicki, Lewicki and Associates (Email) <br />Sandy Brown, DRMS <br />