Direct Final Rule for Revisions to In-Use Testing for Heavy-Duty Diesel Engines and Vehicles; Emissions Measurement and Instrumentation; Not-to-Exceed Emission Standards; and Technical Amendments for Off-Highway Engines
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Rule Summary
The U.S. Environmental Protection Agency (EPA) is publishing a Direct Final Rulemaking to make several amendments to EPA’s mobile source emission standards and test procedures. These revisions affect the in-use particulate matter (PM) testing program for heavy-duty diesel engines, locomotives, spark-ignition (SI) marine engines, small SI engines, Tier 4 nonroad diesel engines, and PM measurement and assessment for both laboratory and field testing.
- Direct Final Rule (pdf) (363 KB, published November 8, 2010)
Additional Resources
Fact Sheet
- Amendments to In-Use Testing for Heavy-Duty Diesels, Measurement and Instrumentation, and Off-Highway Engine Regulations (pdf) (687 KB, EPA-420-F-10-042, October 2010)
Other
- Final Report: PM-PEMS Measurement Allowance Determination (pdf) (6.2 MB, EPA-420-R-10-902, August 2010)