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
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.
- Proposed Rule (PDF) (8 pp, 157 K, published February 3, 1999)
- Proposed Phase 2 Standards for Small Spark-Ignition Engines (PDF) (5 pp, 40 K, EPA-420-F-97-045, December 1997)
- Supplemental Notice of Proposed Rulemaking (PDF) (33 pp, 387 K, published July 28, 1999)