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ms-mailings -- CARB Manufacturers Advisory Correspondence (MAC) for Heavy-Duty In-Use Testing (HDIUT) Data Drift Validation Handling Process Posted: 07 Sep 2017 10:59:45
The CARB MAC #17-02 “Heavy-Duty In-Use Testing (HDIUT) Data Drift Validation Handling Process” has been posted on the CARB website. This MAC contains clarification on how to handle the optional drift validation for the HDIUT (or Not-To-Exceed [NTE]) Program, associated with Part 1065, Subpart F, Section 1065.550(b)(4) that is incorporated in the “California Exhaust Emission Standards and Test Procedures for 2004 and Subsequent Model Heavy-Duty Diesel Engines and Vehicles,” as amended September 2, 2015 (Test Procedures). This MAC can be found on the official CARB MAC website: https://www.arb.ca.gov/msprog/macs/macs.htm If you have any questions or require additional information, please contact Doh-Won Lee, Air Resources Engineer at (626) 350-6543 or via email at email@example.com.