Wisconsin Administrative Code
Department of Natural Resources
NR 600-699 - Environmental Protection - Hazardous Waste Management
Chapter NR 664 - Hazardous Waste Treatment, Storage And Disposal Facility Standards
Subchapter K - Surface Impoundments
Section NR 664.0227 - Emergency repairs; contingency plans

Universal Citation: WI Admin Code § NR 664.0227

Current through August 26, 2024

(1) A surface impoundment shall be removed from service in accordance with sub. (2) when either of the following occurs:

(a) The level of liquids in the impoundment suddenly drops and the drop is not known to be caused by changes in the flows into or out of the impoundment.

(b) The dike leaks.

(2) When a surface impoundment must be removed from service as required by sub. (1), the owner or operator shall do all of the following:

(a) Immediately shut off the flow or stop the addition of wastes into the impoundment.

(b) Immediately contain any surface leakage which has occurred or is occurring.

(d) Take any other necessary steps to stop or prevent catastrophic failure.

(e) If a leak cannot be stopped by any other means, empty the impoundment.

(f) Notify the department of the problem in writing within 7 days after detecting the problem.

(3) As part of the contingency plan required in subch. D, the owner or operator shall specify a procedure for complying with the requirements of sub. (2).

(4) No surface impoundment that has been removed from service in accordance with the requirements of this section may be restored to service unless the portion of the impoundment which was failing is repaired and the following steps are taken:

(a) If the impoundment was removed from service as the result of actual or imminent dike failure, the dike's structural integrity shall be recertified in accordance with s. NR 664.0226(3).

(b) If the impoundment was removed from service as the result of a sudden drop in the liquid level, then both of the following apply:

1. For any existing portion of the impoundment, a liner shall be installed in compliance with s. NR 664.0221(1).

2. For any other portion of the impoundment, the repaired liner system shall be certified by a qualified engineer as meeting the design specifications approved in the operating license.

(5) A surface impoundment that has been removed from service in accordance with the requirements of this section and that is not being repaired shall be closed in accordance with the provisions of s. NR 664.0228.

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