Agenda - Council - 04/23/1991 - Laserfiche WebLink

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I I I I I i I I I I I I I I ! I I I I PART II Page 10 of 18 Permit No: MN 0060259 MANAGEMENT REQUIREMENTS PART II 1. Bypasses A bypass is an intentional diversion of a waste stream from any portion of the treatment facility. Bypasses are prohibited except as allowed by PART II,A.1. of this Permit or as allowed by rules of the Agency. Bypass not causing exceedance of permit effluent limitations. (1) A bypass that does not result in an exceedance of applicable effluent limits is allowed only if the bypass is necessary for essential maintenance to assure efficient operation of the wastewater treatment facility. (2) The Permittee shall notify the Agency in writing of the need for an anticipated bypass at least ten days before the date of the bypass. If the bypass was unanticipated, the Permittee shall notify the Agency as soon as possible under the circumstances, but in no event more than 24 hours after the bypass. Bypass causing exceedance of permit effluent limitations. A bypass that causes an exceedance of an effluent limit, whether anticipated or unanticipated, is prohibited 9xcept under the following conditions: (1) The bypass is unavoidable to prevent loss of life, personal injury, or severe property damage. For the purposes of this paragraph, "severe property damage" means substantial damage to property of the Permittee or of others; damage to the wastewater treatment facilities that may cause them to become inoperable; or substantial and permanent loss of natural resources that can reasonably be expected to occur in the absence of a bypass. "Severe property damage" does not mean economic loss as a result of a delay in production. (2) There is no feasible alternative to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or performance of maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering, judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventative maintenance. (3) In the case of an anticipated bypass, the Permittee has notified the Commissioner at least ten days in advance of the bypass or as soon as possible under the circumstances, and the Commissioner has approved the bypass. The Commissioner shall