The California Air Resources Board (CARB) has issued proposed amendments to its Transport Refrigeration Unit (TRU) regulation, including lowering the December 31, 2010, retrofit requirements for TRUs with 2003 model year engines from 85% to 50% particulate control.
According to the American Trucking Associations (ATA), the change is being prompted by the limited availability of retrofit technologies.
CARB has proposed another amendment that would modify the compliance dates for TRUs with "flexibility engines" to ensure that purchasers of these TRUs are not prematurely subject to the CARB requirements. These engines, which are sold as new, can be manufactured to previous emission standards and may have engine labels that do not accurately reflect the manufacture date.