EPA Gives Labs Extra Time to Ditch Methylene Chloride Drama
Published Date: 11/12/2025
Rule
Summary
The EPA is giving non-Federal labs 18 more months to follow new rules about using methylene chloride, a chemical used in cleanup and testing. This extension means all labs, including Federal ones, now share the same deadlines, helping avoid disruptions and extra costs. The new compliance date starts December 15, 2025, giving labs more time to get ready without rushing.
Analyzed Economic Effects
4 provisions identified: 4 benefits, 0 costs, 0 mixed.
New Exposure Limit Enforcement Dates
If you work in a lab using methylene chloride, the rule requires that airborne exposure not exceed 2 parts per million (2 ppm) as an 8‑hour TWA and 16 ppm as a 15‑minute STEL. Those exposure limits apply to Federal and non‑Federal laboratories after February 8, 2027; for other owners/operators the limits apply after August 1, 2025.
18‑Month Delay for Non‑Federal Labs
If you operate or work in a non‑Federal industrial, commercial, academic, or research laboratory that uses methylene chloride, EPA extended the Workplace Chemical Protection Program (WCPP) compliance deadlines by 18 months. The extension aligns non‑Federal lab deadlines with Federal labs and sets new target dates: initial monitoring by November 9, 2026; establishing regulated areas and ECEL compliance by February 8, 2027; and developing/implementing exposure control plans by May 10, 2027.
Extended Deadlines for Control Plans & Records
Owners/operators using methylene chloride in non‑Federal labs must develop and implement an exposure control plan by May 10, 2027, and must make the plan and related records available to potentially exposed persons with notification within 30 days of plan completion and at least annually. The rule also requires periodic review of the plan at least every 5 years and sets timelines for initial monitoring and other recordkeeping tied to the revised dates.
Small Entities: Relief From Immediate Burden
EPA certified that this extension will not have a significant economic impact on a substantial number of small entities because it relieves regulatory burden by delaying compliance deadlines for industrial and commercial laboratory use of methylene chloride. EPA also states the incremental economic impacts are minimal and that costs estimated in the 2024 rule will be delayed until the new compliance dates.
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