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A number of callers to the California Air Resources Board’s (ARB)
Transport Refrigeration Unit (TRU) Help Line have expressed
confusion over some of the new 2013 TRU models that are offered
for sale by TRU manufacturers and their dealers. 

These callers had the expectation that model year 2013 engines
for trailer TRUs would meet the Ultra-Low-Emission TRU (ULETRU)
in-use performance standard -- that is definitely NOT true if the
engine is rated at less than (<) 25 horsepower (hp).  At this
time, none of the TRU engines that are rated at <25 hp meet the
ULETRU in-use performance standard, so they must still meet
ULETRU before the end of their seventh year.  TRU Advisory 12-22
(see link to TRU Advisories, below) explains the in-use
compliance requirements and options for TRUs that are equipped
with engines rated at <25 hp.

Trailer TRU owners that wish to avoid the cost of compliance with
the in-use standards at a later date may want to consider new TRU
models that meet ULETRU.  ARB now lists the TRU models that meet
the ULETRU in-use standard on the TRU Website (see link below). 
At this time, ONLY the Thermo King Precedent S-Series models meet
ULETRU, which include the S-600 and S-600M models.  This list
will be updated as additional new TRU models meeting ULETRU are
introduced into the market.

Where can I get more information?

For general information about the TRU Regulation, the TRU Website
is at:  http://www.arb.ca.gov/diesel/tru/tru.htm

TRU Advisories are listed at: 
http://www.arb.ca.gov/diesel/tru/advisories.htm

The ARBER registration website is at: 
http://www.arb.ca.gov/arber/arber.htm

ARBER Registration Help pages are at: 
http://www.arb.ca.gov/arber/trureg/trureg.htm

If you have questions about compliance or registration in ARBER,
please call the TRU Help Line at 1-888-878-2826 or call
1-916-327-8737.

Background:  TRUs are refrigeration systems powered by integral
diesel internal combustion engines designed to control the
environment of temperature-sensitive products that are
transported in trucks, trailers, shipping containers, and
railcars.  The emissions from these units are a source of
unhealthful air pollutants including particulate matter, toxic
air contaminants, nitrogen oxides, carbon monoxide, and
hydrocarbons, that all pose a potential threat to both public
health and the environment. These units often congregate in large
numbers at California distribution centers, grocery stores, and
other facilities where they run for extended periods of time to
ensure their perishable contents remain cold or frozen. These
distribution and loading facilities are often in close proximity
to schools, hospitals, and residential neighborhoods.  In 2004,
the TRU Airborne Toxic Control Measure (ATCM) was adopted by the
Board to reduce diesel particulate matter emissions from TRUs and
TRU gen set engines.  Amendments were adopted by the Board in
November 2010 and October 2011.