The U.S. Environmental Protection Agency (EPA) issued a direct final rule and parallel proposal to amend the New Source Performance Standards (NSPS) for Stationary Compression Ignition (CI) Internal Combustion Engines. The direct final rule and parallel proposal revises the particulate matter (PM) emission standard for new stationary CI engines located in remote areas of Alaska. The rule specifies that 2014 model year and later stationary CI engines in remote areas of Alaska must meet the Tier 3 standard for PM rather than the Tier 4 standard.
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