California State Nonroad Engine Pollution Control Standards; In-Use Diesel-Fueled Transport Refrigeration Units (TRU) and TRU Generator Sets; Notice of Decision
Published Date: 1/10/2025
Notice
Summary
The EPA has given a thumbs-up to some of California’s new rules for diesel-powered transport refrigeration units (TRUs) and their generator sets, which help keep goods cold on the road. This means businesses using these diesel TRUs in California will need to follow cleaner, updated standards soon, helping cut pollution. If anyone wants to challenge this decision, they must act by March 11, 2025.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 3 costs, 0 mixed.
New refrigerant GWP requirement for TRUs
California's 2022 TRU Amendments require certain transport refrigeration units (TRUs) manufactured after a certain date to use a refrigerant with a global warming potential (GWP) less than or equal to a specified value. EPA's decision authorizes this requirement for California enforcement.
Particulate matter (PM) standards for non-truck TRUs
The 2022 TRU Amendments require non-truck transport refrigeration units (TRUs) to meet specified particulate matter (PM) emission standards. EPA's decision authorizes California to enforce those PM standards.
EPA did not act on 15% ZETRU turnover rule
EPA explicitly did not act at this time on CARB's requirement that TRU owners turnover at least 15 percent of their diesel-fueled truck TRU fleet to zero-emission technology refrigeration units (ZETRU) by December 31, 2023, and each year thereafter. That specific 15% annual turnover requirement was not authorized in this decision.
Facility registration and reporting obligations
California's 2022 TRU Amendments include registration and reporting requirements for owners of certain facilities that operate TRUs. EPA's authorization allows California to require those registration and reporting obligations.
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