1. Small Engine Workshop Exhaust Emission Program Mobile Source Control Division November 13, 2002

2. Overview of Presentation n Past Significant Events n Amendment Objectives n Current Testing n Next Steps Exhaust Emission Program

3. 1990 - 1st SORE Reg Adopted 2000 - Durability Requirement Implemented 1995 - 1st standards Implemented 1998 - SORE Reg Amendments 1998/2000 - U.S. EPA Finalized Regs Significant Events Exhaust Emission Program 2003 - New Amendments to be Proposed

4. g/bhp-hr HC+NOx Engine Displacement Reductions Already Achieved Exhaust Emission Program <65 cc Emissions Divided by a Factor of 10

5. HC+NOx 2000 2010 2020 85 tpd 54 tpd Annual Average 54 tpd Small Engine Contribution

6. New Amendment Objectives n Adopt U.S. EPA’s 2005 “handheld” emission level n Adopt catalyst based standards for the “non-handheld” n Adopt optional low-emission standards n Align ARB/U.S. EPA Test Procedures Exhaust Emission Program

7. Proposed Amendments 0 - 65cc (“Handheld”) n Adopt U.S. EPA’s 37g/bhp-hr HC+NOx standard –Applicable less than 50cc –CO standard unchanged n Change upper cc limit to 75cc Exhaust Emission Program

8. Proposed Amendments >75cc (“Non-Handheld”) n 50% reduction in HC+NOx standard –based on use of catalyst –75 - <225cc: 6.0 g/bhp-hr –225cc and above: 4.5 g/bhp-hr n No change in durability period n 2006 Implementation Exhaust Emission Program

9. Proposed Amendments Optional Standards n Voluntary n Cleanest Engines n Incentives n 2003-2004/5 MY- Comply with Tier 3 standards n 2005/6 + MY- Comply with levels 50% of Tier 3 standards Exhaust Emission Program

10. Catalyst Test Program n SwRI n Six Engine test program –Four 65-225cc –Two >225cc n Engines equipped with catalysts n Engines run over durability cycle for durability period n Goal: 50% reduction Exhaust Emission Program

11. Catalyst Test Program n SwRI n Six Engine test program Exhaust Emission Program

12. Catalyst Test Program n SwRI n Six Engine test program –Four 65-225cc –Two >225cc n Engines equipped with catalysts n Engines run over durability cycle for durability period n Goal: 50% reduction Exhaust Emission Program

13. Status of Test Effort n SwRI received catalysts n As-received engine exhaust results for Engines A and B n Currently working on catalyst development for Engines A and B n March 2003 - Expected project completion date Exhaust Emission Program

14. Next Steps n Developing regulatory language n Individual manufacturer meetings set for Nov 18-Dec 6 n Complete test program n Board Hearing - June 2003 n Written comments by Dec. 13, 2002 Exhaust Emission Program