Ethylene Oxide (EtO) Compliance Plan — 29 CFR 1910.1047
Written compliance plan for ethylene oxide exposure. PEL 1 ppm TWA; Excursion Limit 5 ppm 15-min; Action Level 0.5 ppm. Built for medical device sterilization, semiconductor manufacturing, spice/herb fumigation, and chemical synthesis. Cross-references EPA NESHAP 2024 update.
When this template is required
Required wherever there is occupational exposure to ethylene oxide, which 29 CFR 1910.1047(a)(1) applies to in full; the Action Level gates periodic monitoring and medical surveillance rather than the duty itself. PEL: 1 ppm 8-hour TWA; Excursion Limit: 5 ppm 15-min; Action Level: 0.5 ppm. EtO is a Group 1 carcinogen and is heavily regulated by both OSHA (worker exposure) and EPA (community exposure). EPA's 2024 NESHAP update for commercial sterilizers tightened community-level emission controls.
Why this template
Group 1 carcinogen — leukemia and breast cancer
IARC classifies EtO as Group 1. Strong evidence for lymphohematopoietic cancers (leukemia, lymphoma) and emerging evidence for breast cancer. The 2016 NIOSH update strengthened the breast cancer evidence.
OSHA worker + EPA community dual regulation
Commercial sterilizers face dual regulation: OSHA 1910.1047 (worker exposure) and EPA NESHAP 40 CFR 63 Subpart O (community emissions). The 2024 EPA NESHAP update substantially tightened community emission controls. The plan includes the crosswalk.
Sterilizer operations procedure
Medical device sterilization is the primary EtO use. The plan documents the typical workflow — pre-conditioning, sterilization, aeration, unloading — with the EtO exposure points and engineering controls at each step.
Excursion Limit (not STEL)
EtO has an 'Excursion Limit' (5 ppm 15-min) which is functionally similar to a STEL. The plan includes the excursion monitoring procedure.
What you receive
- Ethylene Oxide Compliance Plan (Word .docx) — written program per (d)-(n)
- Initial exposure determination procedure (PEL: 1 ppm TWA / 5 ppm Excursion Limit; Action Level: 0.5 ppm)
- Air monitoring schedule (initial + periodic + change-triggered)
- Methods of compliance — engineering & work practice controls hierarchy
- Respiratory protection program crosswalk (with 1910.134)
- Medical surveillance protocol (examination by or under the supervision of a licensed physician, blood/biological tests as applicable)
- Regulated area designation procedure (exposure that may exceed the 1 ppm TWA, or concentration that exceeds or can reasonably be expected to exceed the 5 ppm excursion limit)
- Housekeeping and hygiene procedures
- Employee training outline (annual refresher requirement)
- Recordkeeping requirements (exposure: 30 years; medical: employment + 30 years)
- Sterilizer operations procedure (loading, run, aeration, unloading)
- EPA NESHAP 40 CFR 63 Subpart O crosswalk (commercial sterilizer emissions)
- Emergency release procedure
How you get it
This document is written and reviewed against the standard it cites, and it is ready now. The download link is emailed as soon as your payment clears.
Revisions included — if something about your operation changes what the document should say, reply to the delivery email and we will amend it.
Who buys this
- Medical device sterilization (contract sterilizers and in-house operations)
- Pharmaceutical sterilization
- Semiconductor and microelectronics manufacturing
- Spice and herb fumigation
- Chemical synthesis (ethylene oxide as feedstock)
- Hospital sterilizers (though largely replaced by alternatives)
Frequently asked
Why is EtO heavily regulated by both OSHA and EPA?
EtO is a Group 1 carcinogen with both worker and community exposure pathways. OSHA 1910.1047 controls worker exposure inside the facility. EPA NESHAP 40 CFR 63 Subpart O controls emissions to the community outside the facility. EPA's 2016 IRIS update substantially increased the assessed cancer risk from EtO, leading to the 2024 NESHAP tightening. Both regulatory frameworks apply simultaneously to commercial sterilizers.
How does medical device sterilization use EtO?
EtO is the dominant sterilant for heat-sensitive medical devices — about 50% of US medical devices are sterilized with EtO. The process: devices enter a sterilization chamber, EtO gas is introduced (typically 600-800 mg/L), held for hours under controlled temperature and humidity, then evacuated. Devices aerate to remove residual EtO before release. Worker exposure occurs during loading/unloading, equipment maintenance, and emission control system operation.
What's the medical surveillance protocol?
1910.1047(i) requires medical surveillance for employees exposed at or above the AL for 30+ days/year. Includes medical and work history; physical with attention to hematologic, reproductive, and cancer-related symptoms; CBC with differential; tests as the examining physician determines. Annual surveillance while exposure continues. Post-emergency examinations are made available to every employee exposed to EtO in an emergency, under 29 CFR 1910.1047(i)(1)(i)(B).
Are commercial sterilizers being phased out?
Not phased out, but heavily controlled. EPA's 2024 NESHAP update for commercial sterilizers (effective March 2026) requires near-zero emission controls — typically 99.99% destruction efficiency. Some sterilizers have closed or relocated due to the new requirements. Hospital in-house EtO sterilizers have largely been replaced by alternatives (steam, plasma, gamma) over the past 20 years, though some specialty applications remain.
Does this cover semiconductor manufacturing?
Yes — EtO is used in semiconductor manufacturing for specific deposition and surface treatment steps. Exposures are typically much lower than sterilization operations but still fall under 29 CFR 1910.1047, which applies to all occupational exposures unless the (a)(2) objective-data exemption is documented; the action level determines which periodic duties attach, not whether the standard applies. The plan addresses semiconductor use cases.