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Medium- and Heavy-Duty Vehicle Hotline
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8666DIESEL@arb.ca.gov
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(866) 634-3735 / (866) 6DIESEL

Last Updated 01/2020

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(800) 242-4450  |  helpline@arb.ca.gov 
1001 I Street, Sacramento, CA 95814
P.O. Box 2815, Sacramento, CA 95812

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California Governor
Gavin Newsom Opens a New Window.
Secretary for Environmental Protection
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Chair, California Air Resources Board
Lauren Sanchez Opens a New Window.

The California Air Resources Board is one of six boards, departments, and offices under the umbrella of the California Environmental Protection Agency.

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  • DPR
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