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Owners and operators of portable engines and other portable equipment can register that equipment through the California Air Resources Board's (CARB's) portable engine registration program (PERP), allowing equipment to operate throughout California without obtaining air district specific operating permits. On November 16, 2017, CARB adopted changes to the PERP regulation that will impact the time it takes to obtain a registration and will increase registration fees. The standard processing time for PERP registration applications will increase by a few days under the updated regulation; however, engines meeting the Tier 4 Final emissions standards may be issued a temporary registration in as few as five days. The amendments also now require that operational data be provided in order to renew a PERP Registration.

CARB has also added a Project Review requirement for larger projects (greater than 2,500 hp from portable engines) in the South Coast and San Joaquin Valley air districts. The new provisions require notifying the district prior to the start of large projects, and the district may prepare an air quality impact analysis (AQIA). If the AQIA shows that ambient air quality standards may be exceeded due to a project, the district may require additional mitigation measures. Projects utilizing only Tier 4 engines and/or located in "remote" areas are exempt from these requirements.

CARB also adopted sweeping changes to the Portable Engine Airborne Toxic Control Measure (ATCM), which impacts portable diesel-fueled engines rated at 50 hp or greater. Under the revised regulation, small fleets (less than 750 hp) are no longer required to meet the fleet average emission rate targets. Instead, beginning in 2020, engines must be phased out of service based on engine size and Tier rating. Large fleets (greater than 750 hp) will have the option of either complying with the engine phase-out schedule or meeting new, lower fleet average emission targets. Changes to recordkeeping, reporting, and labeling requirements have also been adopted.

For more information, please contact our Sacramento office at (916) 444-6666.