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The Air Resources Board is reminding transit agencies operating
Transit Fleet Vehicles (TFV) as defined under title 13,
California Code of Regulations (CCR), section 2023(12) of the
December 31, 2010 emission reduction deadline for particulate
matter (PM) and oxides of nitrogen (NOx) emissions. The TFV
Regulation contained in title 13, CCR, section 2023.2 requires
that no later than December 31, 2010:

•	the diesel PM emission total for a transit agency shall be no
more than 20 percent of its diesel PM emission total on January
1, 2005 or equal to 0.01 g/bhp-hr times the total number of
current diesel-fueled active fleet buses, which ever is greater,
and
•	the NOx fleet average shall not exceed 2.4 g/bhp-hr or be void
of 2001 and earlier model year engines.

Transit agencies operating TFVs that have not reduced their PM
emissions by 80 percent or met the 2.4 g/bhp-hr NOx fleet average
should develop emission reduction plans to meet this important
requirement.  

Questions regarding these requirements should be directed to Mr.
Eric Bissinger, Air Pollution Specialist, at (916) 324-9424, or
by e-mail ebissing@arb.ca.gov.