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In order to guarantee double credit for installation of
retrofits, fleets subject to the in-use off-road diesel vehicle
regulation must order them within the next month, before
November 1, 2008. Fleets that wish to reduce their early year
compliance costs should consider placing orders for retrofits in
the next month.  

When a fleet installs a highest level verified diesel emission
control system (VDECS) retrofit on an engine before March 1,
2009, the fleet will receive double credit.  That is, the fleet
will receive carryover retrofit credit equal to double the
horsepower of the engine on which the highest-level VDECS is
installed.  This credit will mean that the fleet can delay
required installations of retrofits in the future, thereby
spreading out their compliance costs.  If installation of a
VDECS is delayed until after March 1, 2009 due to manufacturing
delays, the fleet will still earn double credit as long as the
order was placed before November 1, 2008.

There are currently five Level 3 systems verified for off-road
use:

•  Cleaire Horizon: Most on-road engines; conditionally verified
for off-road engines;
•  HUSS Umwelttechnik FS_MK: Most on-road and off-road diesel
engines through 2007 model year;
•  Engine Control System Combifilter: 2007 or older off-road
engines;
•  Caterpillar DPF: Conditionally verified for 1996-2008 model
years; off-road, rubber tired vehicles; and
•  DCL MINE-X Sootfilter: Conditionally verified for 1996-2008
model year, rubber tired off-road vehicles.

For further information, please visit the Level 3 verification
page at http://www.arb.ca.gov/diesel/verdev/level3/level3.htm. 


For more information on the off-road regulation, please visit
http://www.arb.ca.gov/msprog/ordiesel/ordiesel.htm.