What the regulatory thresholds actually say
Three agencies set exposure limits for chlorine dioxide in workplace environments:
- OSHA -- Permissible Exposure Limit (PEL): 0.1 ppm as an 8-hour time-weighted average (TWA)
- NIOSH -- Recommended Exposure Limit (REL): 0.1 ppm TWA; Short-Term Exposure Limit (STEL): 0.3 ppm over 15 minutes
- ACGIH -- Threshold Limit Value (TLV): 0.1 ppm TWA; 0.3 ppm STEL
These limits apply to continuous occupational exposure across an 8-hour shift. CLEANTheory programs are designed and monitored to operate well below these thresholds. AIRRox™ is calibrated to operate within OSHA, NIOSH, and EPA safety standards as a normal operating condition, not an exception.
How AIRRox™ operates in occupied facilities
AIRRox™ is an automated, timed-release ClO₂ system deployed at entry points and air handling areas. The delivery mechanism is controlled and intermittent, not a continuous high-concentration release. The system runs on a schedule calibrated to the specific facility, with exposure concentrations designed to stay below occupational thresholds during normal operations.
No re-entry interval is required after AIRRox™ operation at normally prescribed dosing. Workers continue operations in the facility without waiting periods or room clearances.
How PATHox™ operates in occupied facilities
PATHox™ is a no-rinse terminal sanitizer for surfaces. Applied at the concentrations and contact times specified on the EPA-registered label, it requires no re-entry interval and leaves no harmful residue on treated surfaces. Bleach leaves ionic residues on stainless steel that require deionized water removal. Quaternary ammonium compounds accumulate surface films in organic-rich environments. PATHox™ is compatible with ongoing facility operations without either of those drawbacks.
What CLEANTheory manages on your behalf
Safe operation around workers is a property of the program managing the chemistry, not of the chemistry alone. That means:
- Calibrated dosing to confirmed concentration at point of application
- Delivery method matched to the facility's operational layout
- Monitoring for ambient ClO₂ levels in occupied work areas where warranted
- Standard PPE protocols for handling concentrated precursors during delivery
- Staff training on what to expect during scheduled treatment cycles
CLEANTheory designs, installs, and manages all of this. The program is the safety layer.
A note on any chemistry
Chlorine dioxide, like any industrial chemistry used in an agricultural production environment, requires competent management. Certain precautions -- PPE during delivery, sensor monitoring in high-use areas, proper storage of precursor components -- are always recommended. CLEANTheory handles all of this as part of the managed program. Running ClO₂ without managed oversight changes the safety profile significantly, and we would tell you so directly.