CO Monitoring Program
Carbon monoxide monitoring procedures, alarm thresholds, ventilation requirements, and emergency response for enclosed construction spaces.
What this document is
This document is a written Carbon Monoxide Monitoring Program that meets OSHA requirements for work in enclosed spaces. It spells out how to test air quality, set alarms, provide ventilation, and respond when carbon monoxide levels become dangerous.
The regulation that requires it
29 CFR 1926.800 requires employers to test for hazardous atmospheres in underground construction and enclosed spaces and to take steps to keep workers safe. The rule specifically directs employers to control carbon monoxide so exposures stay below the ACGIH TLV of 25 ppm as an 8-hour TWA. It also requires continuous monitoring when ventilation is used to control the hazard and immediate evacuation or correction when levels rise. California contractors must also follow the identical requirements under Title 8 CCR 8400-8410.
Who needs it
General contractors, subcontractors, and specialty trades that work inside tunnels, shafts, tanks, vaults, or other enclosed spaces on construction sites need this program. Employers in California must comply with both federal 29 CFR 1926.800 and the matching Title 8 CCR sections enforced by Cal/OSHA. Even short-duration tasks that use gas-powered equipment or internal-combustion tools trigger the requirement.
What happens without it
OSHA and Cal/OSHA cite employers for serious violations when carbon monoxide monitoring is absent or incomplete. Current penalty ranges run from $16,131 to $161,323 per serious violation depending on employer size, history, and gravity. Willful or repeated violations can reach the statutory maximum. Multi-employer work sites often result in citations to both the controlling contractor and the exposing employer. Inspection risk is high in underground and confined-space projects.
What's included in the generated document
- Purpose and scope of the CO monitoring program
- Definitions and exposure limits based on ACGIH TLV
- Monitoring equipment, calibration, and alarm set points
- Ventilation and work-practice controls
- Emergency response and evacuation procedures
How to implement it at your company
- Download the PDF and edit the company name, site-specific information, and responsible person sections.
- Train all affected employees and supervisors on the written program.
- Select and calibrate the required carbon monoxide monitors before any enclosed-space work begins.
- Post the program at the job site and keep monitoring records for the required retention period.
- Review the program annually or after any incident and update it as needed.