In August 2020, the California Air Resources Board (ARB) approved amendments to the "Airborne Toxic Control Measure for Auxiliary Diesel Engines Operated on Ocean-Going Vessels At-Berth in a California Port" Regulation, commonly referred to as the At-Berth Regulation. The purpose of the At-Berth Regulation is to reduce emissions from diesel auxiliary engines providing power on container, Roll-on/roll-off (RoRo), cruise, and liquid bulk (tankers) vessels while berthing at a California Port. The At-Berth Regulation provides vessel fleet operators visiting these ports two options to reduce at-berth emissions from auxiliary engines as described below. Option 1. Turn off auxiliary engines and connect the vessel to some other source of power, most likely grid-based shore power. Option 2. Utilize alternative capture and control technology that achieves equivalent emission reductions for SOx, NOx, PM, and ROG. This presentation will focus on Option 2 above and will discuss the technology, operations, and costs of systems that have been approved by the state as an alternative control technology. Discussion will focus on the current commercial operations of these systems in terms of logistics and cost. The current state of the art designs will be presented of future systems that will be needed to comply with the most recent amendments to the rule. The development of regulations in other parts of the US, western Europe, and Asia will be discussed, as well as details of the current At-Berth regulation amendments.
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