Field Office Compliance - Assistance

Assistance ID - 22053

MidAmerican CB Energy Center CCR Monofill - 310540055

7215 Navajo St Council Bluffs, IA 51501

Pottawattamie County

FO 4

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Attached Files/Reports

File Name	File Type	File Date	Note

Comments

Date	Comment	Commenter
7/23/2010	Dan Olson: I want to make sure that I am clear on what you are asking. You want to haul water from the coal pile pond, which discharges via outfall 004, to the south ash pond, which does not discharge, to be used as "sluice" for unit #3? Jeff Walters: That is correct. It would be a very rare occurrence due high water levels resulting from precipitation when we cannot discharge due to high pH. Dan Olson: If TSS is too high to discharge, then hauling to the south ash pond is probably better than allowing it to overflow and possibly get to the river. Jeff Walters: The Missouri River is listed as the receiving stream. The reality is that the discharge hits an open area, then flows to a roadside ditch, then to a wetland (which we put in as a mitigation project with the corps) then to a prairie area. It would then have to travel a ways to the levee and to the relief pumps. It doesn't get there. Dan Olson: Still, a permit is required to discharge from the pond so I have to see an overflow, especially an overflow with TSS higher than the permit would allow to be discharged, as a bad thing. I am going to say that, to avoid an overflow, you can haul water from the coal pile pond to the south ash pond. Since the hauled water will be a flow that was not considered in the NPDES permit, I would still consider it a bypass and will want you to do the required reporting (Start time, end time, gallons, pH, TSS, etc.). Jeff Walters: That's fine. It would be a rare event. Dan Olson: How rare? Jeff Walters: Last year we did call in a bypass. We did some modifications. We have a small pond for a big coal pile. Dan Olson: I believe I saw a letter from Kirk in the file regarding that. Jeff Walters: I think Kirk and Dan did a site visit and approved taking the water to the pond. Dan Olson: If this is not the planned fate for the water in the coal pile pond (in terms of the NPDES permit) and it happens with any degree of frequency due to the pond being to small to treat the runoff from the coal pile pond adequately to meet permit limits, you may be asked to build a bigger pond.	DAN OLSON

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