The California Air Resources Board (CARB) contracted with the University of California at Riverside (UCR) Bourns College of Engineering – Center for Environmental Research and Technology (CE-CERT) to evaluate oxides of nitrogen (NOx) and particulate matter (PM) emissions from the use of renewable diesel (RD)/biodiesel (BD) blends in one on-road and one off-road new technology diesel engine (NTDE) with selective catalytic reduction (SCR) and diesel particulate filter (DPF) exhaust aftertreatment systems, and one off-road non-NTDE (legacy engine) without DPF and SCR.
CARB staff has identified several questions about the study results that require further discussion and evaluation. Staff invites stakeholders to evaluate the questions from the CARB notice and offer feedback on what additional considerations or other data we should include in our evaluation. Feedback on this report and the questions from the CARB notice will be accepted until January 31, 2022, and should be sent by email to adf@arb.ca.gov. Feedback received will be considered public information and may be posted.
