2011-12-15_REVISION - M1980244 (27)

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associated with the PSE circuit. Please refer to section 11.4.3 VLF in the Amendment No. 9 Permit Application for a detailed discussion of decommissioning and reclamation of the liner for the current VLF. It is anticipated that the PSE lined area proposed in TR 64 is contiguous with, and indeed, "ties into" the VLF liner, that decommissioning and reclamation will be exactly the same. Briefly summarizing section 11.4.3: (1) Upon reaching CNWAD criteria in the VLF, the liner system will be breached by using a drill rig to penetrate the subsurface to allow downward migration of any post - reclamation stormwater; (2) the liner system will be folded in on the edges; (3) excess fill materials over the entire area will be graded to slopes gentler than 2.5H to 1V using bull- dozers; (4) the entire area will have growth media placed to a depth of not less than 6 inches using the truck/shovel fleet or earthmoving scrapers; (5) the area will be disked or ripped to prepare a seedbed; (6) the growth media will be amended with fertilizers (if needed as indicated by soil testing); and (7) revegetation will take place utilizing the approved Amendment No. 9 seed mix. #6. Please provide some discussion as to whether stormwater capacity in the PSE liner area has been considered and how excess stormwater will be handled. Response: Any precipitation that falls within the proposed lined PSE lined area will report to the existing Phase 1 PSSA in the existing VLF. The volume of stormwater will be accounted for in the daily water balance at the site. The level of solution contained within Phase I PSSA will be operated and maintained as previously approved by DRMS for the Cresson Project. Please contact me at (719)- 689 -4055 should you have questions or wish to discuss this adequacy review response for TR -64. Sincerely, 1 �cs'" -- Timm Comer Manager, Environmental Resources Enclosed in triplicate: Revised Drawings A100, A105, A110, A115, Al20, and Al25