Minn. R. agency 167, ch. 7049, pt. 7049.0140

Current through Register Vol. 49, No. 24, December 9, 2024

Part 7049.0140 - PRETREATMENT STANDARDS; PROHIBITED DISCHARGES

Subpart 1.Scope.

The prohibitions in this part apply to every source of indirect discharge whether or not it is subject to other pretreatment requirements.

Subp. 2.General prohibitions.

A source of indirect discharge shall not introduce any pollutants that cause pass-through or interference.

Subp. 3.Specific prohibitions.

In addition to the general prohibitions in subpart 2, the following pollutants shall not be introduced into a POTW:

A. pollutants that create a fire or explosion hazard in a POTW, including, but not limited to, waste streams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 60 degrees centigrade using the test methods specified in Code of Federal Regulations, title 40, section 261.21;

B. pollutants that will cause corrosive structural damage to a POTW, but in no case discharges with a pH lower than 5.0, unless the POTW plant is specifically designed to accommodate such discharges;

C. solid or viscous pollutants in amounts that will cause obstruction to the flow in a POTW plant or POTW collection system resulting in interference;

D. any pollutant, including oxygen-demanding pollutants such as biochemical oxygen demand, released in a discharge at a flow rate or pollutant concentration that will cause interference or pass-through at a POTW plant;

E. heat in amounts that will inhibit biological activity in a POTW plant resulting in interference, but in no case heat in such quantities that the temperature at the headworks of the receiving POTW plant, excluding the POTW collection system, exceeds 104 degrees Fahrenheit or 40 degrees centigrade unless the agency, upon request of the POTW authority, approves alternate temperature limits;

F. petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass-through; or

G. pollutants that result in the presence of toxic gases, vapors, or fumes within a POTW plant in a quantity that may cause acute worker health and safety problems.

Subp. 4.Discharge.

Wastes trucked or hauled to a POTW shall be discharged only at a point designated by the POTW authority.

Minn. R. agency 167, ch. 7049, pt. 7049.0140

33 SR 696

Statutory Authority: MS s 115.03