1987-03-10_PERMIT FILE - C1981008A

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O'Connor Page 2 November 24, 1986 Sec. V(1) As stated in our mid-term response of July 3, PCC submitted a revised Adjudication File (Tab 3) with the Technical Revision (TR) which detailed changes in the corporate structure, addresses, etc. on October 16, 1986. A permit application document was submitted with the TR. Another is attached to this letter for this Permit Revision Application. (2) An updated insurance policy was submitted with the July 3, 1986 response to Mid-term comments and is included in both the TR and PR (Tab 3, Attachment 3-10) . (3) An updated NPDES permit was submitted with the July 3, 1986 response to Mid-term comments and is incorporated into the PR in Tab 7, Appendix 7-6. Tab 3, Section VII of the TR and PR reflect the current NPDES permit status. (4a) The 4th Quarter, 1984 NPDES Reports for Ponds 004-006 were submitted with the July 3, 1986 response. (4b) Sediment level determination methods were submitted in early September, 1986. Additional comments were received from CMLRD on September 30, 1986. Responses to these letter comments were incorporated in the methodologies presented in the TR in Appendix 7-1. These same methodologies are presented in Tab 7, Appendix 7-1 of the PR. (4c) Tab 7, Appendix 7-le of this PR details the remedial action to be taken to repair gullying on the downstream face of Pond 006. (4d) As presented in Tab 7, Section V.B and C, downgradient ground and surface water quality monitoring data suggest that impacts from mining have not precluded the historical or existing uses of irrigation return flow. It is PCC's conclusion that lining of the irrigation ditch is not necessary to project the existing water use. (4e) Four aquifers tests were performed at the Nucla Mine during the 1986 summer field season. Data collected and interpretation are presented in Tab 7, Section V.C.4 - pp. 142-150 of this PR.