2010-02-24_REVISION - C1996083 (3)

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• 2.05.3 sediment ponds. Ponds B and C are designed to contain a one year sediment load which is less than the more typical three year sediment design load. Pond J is designed to contain a two year sediment load. Therefore, the sediment from the ponds may have to be removed more frequently. Sediment will be removed from ponds B, C, J,' K and F and the gob pile sediment pond no later than when the ponds are 75% full of sediment. Markers will be installed in Pond F clearly indicating the required sediment cleanout level and maximum water level that could occur while still allowing ample storage for the design event. (ii)(D) Sediment ponds B, C, J, K, F and the gob pile sediment pond will be removed after the site has been reclaimed and the vegetation on the reclaimed site is adequate to control erosion. Pond removal must be authorized by the Division and the untreated drainage from the disturbed area ceases to contribute additional suspended solids above natural conditions. (iii) None of the sediment ponds meet the size requirements of this section, therefore this section is not applicable. (b) The sediment ponds are considered temporary ponds and are designed to meet the requirements of Rules 4.05.6 and 4.05.9. (c) Not applicable. (d) Collection ditches and diversion ditches have been designed to comply with the requirements of rules 4.05.3 and 4.05.4. Small Area Exemptions (SAE) The locations of the small area exemptions are presented on Maps 20, 21 -1, 35, 36, 36a and 39. The Applicant will monitor the flow from the small area exemptions to assure compliance with 4.05.2(3). The Applicant will use its best efforts to obtain samples. The samples will be analyzed for pH, conductivity and total settleable solids. Samples will be in compliance if they contain settleable solid levels of 0.5 ml /I or less and the pH is greater than 6.5 and less than 9.0. • PR -12 2.05-41- 02/10