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Division within one month of the end of the quarter. Please either justify this change or revise <br />the permit text to conform to the currently approved plan. Also, please include the timing of the <br />submittal of the discharge monitoring reports in the permit text discussion. <br />6. In Appendix M, the Sedcad hydrology designs use 2.4 inches for the 100 year-24 hour <br />precipitation event. However, it appears from the NOAA Atlas 2, Volume III that the value <br />should be 2.6 inches. Please explain the use of 2.4 inches or provide revised hydrology designs <br />for those structures using the 100 year-24 hour precipitation event. <br />7. Please provide the Subwatershed Hydrology Detail design sheets and the Structure Summary <br />design sheets for the 100 year-24 hour precipitation event Sedcad run for the operational <br />configuration and the 10 year and 100 year precipitation event Sedcad runs for the reclaimed <br />configuration. <br />8. Please provide a discussion in the permit text that describes the method for reclaiming the <br />current sediment pond, including what will be done with the pond cleanings. <br />9. It appears that page 35 of Appendix M should actually be numbered page 31. If this is correct, <br />please revise Appendix M accordingly. <br />10. In the Structure Summary on page 30 and 35 of Appendix M, there are several structures with <br />asterisks. The footnote on page 35 explains that these structures have incomplete design <br />parameters. Please explain. <br />11. It appears that several revisions need to be made to Table 3.1-1: <br />A. The side slopes for ditch R11 should be 1.5 instead of 2.0. Please revise accordingly. <br />B. The ditch depth for ditch D-1113-1 should be 1.03 feet instead of 1.3 feet. Please revise <br />accordingly. <br />C. The values for the right side slope and the left side slope need to be switched for ditches <br />R17, R18 and R20. Please revise this table. <br />D. The side slopes for ditch R22-b should be 6.0 instead of 2.0. Please revise accordingly. <br />E. The flow values for ditches R22-a, R22-b and R22-c should be 11.4 cfs, 38.3 cfs and 39.3 cfs <br />respectively instead of the listed values of 17.5 cfs, 42.1 cfs and 43.1 cfs respectively. Please <br />revise these values. <br />12. In Table 4.2ii, please include baseline monitoring results for stations SW-2, SW-5 and, possibly <br />SW-4, since they are part of the approved surface water monitoring plan. Also, baseline <br />monitoring results are listed for Upper East Salt Creek and Lower East Salt Creek. Please identify <br />in the table the site names as they are designated on Figure 4.2-2. <br />2