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Subpart 1.

Effluent limits.

For point source discharges of sewage, industrial, or other wastes to surface waters classified as limited resource value waters pursuant to parts 7050.0140, subpart 8, and 7050.0400 to 7050.0470, the agency shall require treatment facilities that will provide effluents conforming to the following limits:

Pollutant Limiting Concentration
Five-day carbonaceous biochemical oxygen demand 15 mg/L* (arithmetic mean of all samples taken during any calendar month)

*This 15 milligrams per liter limit does not apply to discharges to limited resource value waters if the principal method of treatment is through stabilization ponds, in which case the limits in parts 7053.0215, subpart 3, and 7053.0225, subpart 5, apply. All effluent limits specified in part 7053.0215, subpart 1, are also applicable to dischargers of sewage to limited resource value waters, provided that toxic or corrosive pollutants are limited to the extent necessary to protect the designated uses of the receiving water or affected downstream waters.

Subp. 2.

Alternative secondary treatment effluent limits.

The agency shall allow treatment works to be constructed or operated to produce effluents to limited resource value waters at levels up to those stated in part 7053.0215, provided that it is demonstrated that the water quality standards for limited resource value waters will be maintained during all periods of discharge from the treatment facilities.

Subp. 3.

Protection of downstream waters.

Notwithstanding the effluent limits established by this part, the quality of limited resource value waters must not allow a violation of applicable water quality standards in waters of the state that are connected to or affected by water classified as limited resource value waters.

Subp. 4.

Public waters designation unaffected.

The classification of surface waters as limited resource value waters pursuant to parts 7050.0140, subpart 8, and 7050.0400 to 7050.0470, does not supersede, alter, or replace the classification and designation of such waters as public waters pursuant to Minnesota Statutes, chapter 103G.

Statutory Authority:

MS s 115.03; 115.44


32 SR 1699

Published Electronically:

April 1, 2008

Official Publication of the State of Minnesota
Revisor of Statutes