CARB approves CAP catalytic particulate filter
Clean Air Partners (CAP) has received the approval of the California Air Resources Board (CARB) for a new catalytic particulate filter developed for CAP's natural gas and dual-fuel truck engines. CAP said its filter reduces engine particulate matter (PM) emissions from its dual-fuel truck engines to 0.006 grams per brake horsepower-hour, 40% below the Environmental Protection Agency's 2007 emission