Minnesota CO Monitoring Program
Minnesota-specific carbon monoxide monitoring requirements for enclosed construction spaces, including continuous monitoring thresholds and alarm standards.
What this document is
This is a plain-English guide to the Minnesota carbon monoxide monitoring program for enclosed construction spaces. It walks contractors through the required monitoring thresholds, alarm standards, and written program elements so they can meet state rules without confusion.
The regulation that requires it
Minnesota Rules 5205.0660 sets specific requirements for carbon monoxide monitoring in enclosed spaces during construction activities. The rule requires continuous monitoring when internal combustion engines or other CO sources operate in areas with limited ventilation. It mandates the use of approved detectors that alarm at 35 ppm and requires employers to implement controls when levels reach 50 ppm.
Who needs it
General contractors and subcontractors performing work in enclosed spaces in Minnesota must follow this rule. Trades that commonly use gas-powered equipment indoors, such as welders, plumbers, masons, and equipment operators, are most affected. While this document addresses Minnesota Rules 5205.0660, California contractors working across state lines should also review Title 8 CCR requirements when applicable.
What happens without it
OSHA and state plan inspectors can issue citations during routine site visits or after an incident. Serious violations typically carry penalties from $16,131 to $161,323 per violation under the current federal OSHA penalty schedule, while willful or repeated violations can exceed $161,323. Multi-employer worksites increase the chance that the controlling contractor will also receive citations. Lack of documentation often leads to additional recordkeeping violations.
What's included in the generated document
- Scope and applicability section
- Monitoring equipment specifications
- Alarm and action level procedures
- Employee training requirements
- Recordkeeping and program review procedures
How to implement it at your company
- Download and review the completed program document.
- Select and calibrate CO monitors that meet the rule specifications.
- Train affected employees on the monitoring procedures and alarm responses.
- Post the written program at the job site and keep monitoring records.
- Conduct periodic reviews and update the program when site conditions change.