Minnesota Neutralization of Wastes regulations & environmental compliance analysis

Minnesota Neutralization of Wastes: What you need to know

Governing Law and Regulations

Elementary neutralization unit (ENU): Minnesota Rules (MR) 7045.0020, Subpart 21

For a Limited Time receive a FREE EHS Report "Recordkeeping for EHS Managers." This special report contains a recordkeeping checklist to help you keep track of your records for major environmental laws and OSHA's Hazard Communication Standard. Download Now

Exemption for on-site neutralization units: MR 7045.0450, Subpart 3, E; MR 7045.0552, Subpart 3, F (interim status)

Eligibility termination: MR 7001.0520, Subpart 4

General facility standards: MR 7045.0652, MR 7045.0655

Inspection requirements: MR 7045.0655, Subpart 3

Operating requirements: MR 7045.0655, Subpart 4

Recordkeeping requirements: MR 7045.0655, Subpart 5

Closure/treatment: MR 7045.0655, Subparts 6 to 7

Regulatory Agency

Minnesota Pollution Control Agency (MPCA) Industrial Division

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

· Rules. Unlike the federal rules, Minnesota's hazardous waste facility exemption for elementary neutralization units applies only to units neutralizing waste generated on-site. Elementary neutralization units used to neutralize waste generated from an off-site source have to be permitted as hazardous waste facilities by MPCA. The state has inspection, operating, recordkeeping, and closure requirements for a neutralization unit (as well as a pretreatment unit, wastewater treatment unit, or combustion waste facility).

Note: The federal facility permit exemption for elementary neutralization units does not distinguish between on-site and off-site units.

· Administration and enforcement. MPCA's Industrial Division administers and enforces the hazardous waste neutralization rules in Minnesota.

State Requirements


MR 7045.0655, Subpart 3

The owner or operator must inspect the elementary neutralization unit for malfunctions and deterioration, operator errors, ...

Read more about Neutralization of Wastes

Minnesota Neutralization of Wastes Resources

Type Title
See all Neutralization of Wastes Resources