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Regulations for Emissions from Vehicles and Engines

Proposed Rule and Related Materials for Control of Air Pollution: Minor Amendments to Emission Requirements Applicable to Small Nonroad Spark-Ignition Engines and Marine Spark Ignition Engines

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The EPA proposed Phase 2 standards for nonroad small spark-ignition (SI) engines that will reduce hydrocarbons plus oxides of nitrogen (HC+NOx) by an additional 30 percent beyond the current Phase 1 standards. The proposed rule includes provisions that give industry flexibility and ease the transition to the more stringent Phase 2 program, especially for small volume engine and equipment manufacturers. The new standards would be phased in between 2001 and 2005.

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