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

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

st SORE Reg Adopted Durability Requirement Implemented st standards Implemented SORE Reg Amendments 1998/ U.S. EPA Finalized Regs Significant Events Exhaust Emission Program New Amendments to be Proposed

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

HC+NOx tpd 54 tpd Annual Average 54 tpd Small Engine Contribution

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

Proposed Amendments cc (“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

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

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

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

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

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

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 Expected project completion date Exhaust Emission Program

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