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Technical Support Document and Assessment of Marine Emission Control Strategies, Zero-Emission, and Advanced Technologies for Commercial Harbor Craft: Proposed Amendments to the Commercial Harbor Craft Regulation

Abstract

The purpose of this technology evaluation is to provide additional technical support and document California Air Resources Board (CARB) staff’s analysis of the emissions control technologies and opportunities to achieve reductions from the Commercial Harbor Craft (CHC) sector. CARB’s existing regulation for CHC in Title 17, California Code of Regulations (CCR) § 93118.5, broadly requires affected new and in-use CHC to meet performance standards. After full implementation of the CHC regulation in 2022, achieving additional reductions will continue to require the use of lower-emitting diesel engines and other advanced technologies. There is a broad variety of harbor craft in California across a variety of vessel types including ferries, tugboats, fishing vessels, pilot vessels, barges, dredges, crew and supply vessels, workboats, and other types of special use vessels. Consequently, the engine and vessel configurations, and operational needs will vary widely across vessel categories, and also within each distinct vessel category. In addition, meeting proposed performance standards will require more stringency than U.S. EPA standards alone. This appendix reviews and assesses the feasibility associated with the proposed performance standards for CHC, emission control strategies for marine engines; availability of equipment, vessel feasibility, and shipyard availability; fuels used on marine vessels; zero-emission and advanced technologies on marine vessels, and infrastructure required to support alternative fuel and zero-emission vessel operations.