EPA has moved a chemical monitoring deadline that expired in December 2025, and given plants until June 2027 to do the measuring
Three of the dates EPA extended on Tuesday had already expired.
The agency published a final rule, effective immediately on publication, moving a set of compliance dates in the Workplace Chemical Protection Programs it wrote for perchloroethylene and carbon tetrachloride in December 2024. For perchloroethylene, non-federal owners and operators were supposed to have completed initial monitoring for inhalation exposure by December 15, 2025, and to have met the exposure limit, established a regulated area and stood up a respiratory protection program by March 13, 2026. Those dates are now June 21, 2027 and September 20, 2027.
Carbon tetrachloride was one date past and one date short. Initial monitoring there was due June 11, 2026, which has also gone, while the exposure limit and the related requirements were not due until September 9, 2026. Both move to the same pair of 2027 dates as perchloroethylene, so the two chemicals now run on one timetable.
The reasons differ by chemical, and EPA states both.
For perchloroethylene the problem was traffic. Industry and trade organisations told the agency that facilities subject to more than one Workplace Chemical Protection Program under section 6 of the Toxic Substances Control Act were running overlapping requirements on separate clocks, and that the split between federal and non-federal deadlines created confusion for operators working under both federal and commercial contracts. For carbon tetrachloride the problem was measurement. Commenters said there are no adequate monitoring methods for short-duration tasks that can reliably measure down to the existing chemical exposure limit, which makes the monitoring deadline hard to satisfy with instruments that exist.
EPA does not present this as a technicality. The preamble states plainly that the rule is a change in position from the two 2024 rules, that the agency intended the original timeframes to be practicable, and that it did not fully anticipate the difficulty of implementing programmes for several chemicals on overlapping timeframes, nor the confusion caused by separate federal and non-federal dates. Section 6(d) of the statute requires compliance dates that are as soon as practicable while allowing a reasonable transition period, and EPA has concluded the new dates fit that test better than the old ones.
One extension came from the other direction. An advocacy organisation asked EPA to move related dates, including training, so that the pieces of the programme arrive together rather than requiring workers to be trained on controls that do not yet exist. EPA agreed, and moved the perchloroethylene training deadline for federal and non-federal entities alike from March 13, 2026 to September 20, 2027.
The money is small and the agency says so. EPA puts the annualised cost savings of the extensions at $4.78m to $6.43m, and states that the quantified costs of the underlying rules are unchanged and simply will not be incurred until the extended dates arrive. It certified no significant economic impact on a substantial number of small entities, on the ground that the rule relieves burden rather than adding it.
Two things in the rule point past it. EPA wrote the perchloroethylene amendments at 40 CFR 751.607 to be severable from the carbon tetrachloride amendments at 751.707, so that litigation against one does not take down the other, and petitions for review of the 2024 rules are already consolidated in the Fifth Circuit for perchloroethylene and the Eighth Circuit for carbon tetrachloride. The agency has announced it intends to reconsider both rules and expects to propose amendments in a separate rulemaking.
The list of industries EPA says may be affected runs from petroleum refineries and petrochemical plants through waste management, primary metals, commercial screen printing and nonwoven fabric mills.
