2018-05-31_REVISION - C1982056 - Laserfiche WebLink

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RN07 Page 12 5/30/18 disturbance, soil recovery estimates are typically based on the soils mapping, unit descriptions, and our previous (if any) field experience in the general vicinity of the proposed disturbance area. Th e additional text description referenced in the previous response includes information on determination of soil recovery depths. Resolved Rule: 2.05.3 (4)(a)-(d) 37. In Section 2.05-76.1 through 2.05-84, there seems to be duplicate information and outdated pages. Please address the following: a. Please clarify Exhibit 8C (1). Was this structure ever built? b. In the narrative (Section 2.05-76.1 through 2.05-84) for the following ponds, please insert the Exhibit number and information as to the design precipitation event (for example: 10yr/24 hr or 25yr/24hr): i. Pond B ii. Pond C iii. Pond D iv. Pond E v. Pond F vi. Pond G vii. Pond T viii. FCB Treatment Facility Response: - The treatment ponds for the EMD Dewatering Facility (10-Right) referenced in the text, with designs provided in Exhibit 8C(1), have not been built. There is, however, still the potential that they could be needed in the future, so the related text discussion and design information should be retained in the PAP. The referenced text discussion for sediment control structures has been revised to reference the applicable exhibit(s) for each structure and the design basis. Copies of the revised text pages accompany these responses for replacement in the PAP. Resolved 38. Section 2.05-76-1 regarding Pond D states that the spillway was relocated. Please either provide the exhibit number for updated as built designs for the relocated spillway, or provide a set of updated as-builts reflecting the new spillway location. Response: - The referenced Pond D spillway modifications were approved under TR07-59, with designs as shown in Exhibit 8H2. The referenced permit text has been revised to reference this exhibit and copies of the revised text page accompany these responses for replacement in the PAP. Resolved 39. Pond F Exhibit 8I includes a list of As-Built Specifications. Exhibit 8P in the Permit entitled: Plate 1, Sediment Ponds, Energy Mines No.1 and No. 2 and Eckman Park includes a table entitled Pond Schedule. The Pond Schedule table and Exhibit 8I As Built Specification values differ from each other. Please address the following: a. Please check Exhibit 8I, as built specifications for Pond F against the Pond Schedule in Exhibit 8I(P) and submit a new Pond Schedule table addressing the following values: i. Sediment Storage Volume