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Board Now Predicts that Off–Road Diesel Emissions Will be Lower than State’s Goals for Years to Come, Contractors Urge Immediate Repeal of Unneeded Rule

The California Air Resources Board abandoned its original estimates of off–road diesel emissions today, conceding that its “off–road rule” is not needed to meet ambitious goals for the off–road equipment in the construction and certain other industries. According to new estimates that the agency staff developed over the summer, off road fleets of diesel equipment will exceed the state’s emission goals for many years to come.

During the earlier rulemaking process, the board staff used the now abandoned estimates to justify an “off–road rule” that would needlessly force contractors across the state to retire, retrofit, repower or replace billions of dollars worth of construction equipment, and all at a time when California’s construction industry is still losing jobs. When informed of the state’s new forecasts, association officials called on the Board’s members to repeal the rule “quickly and completely.”

“The fact that this agency has been willing to find and fix the significant flaws in its original estimates is a victory for sound science over rash regulation,” said Mike Kennedy, general counsel for the Associated General Contractors of America. “As the agency’s own data now makes clear, it is time for the board to repeal its costly and unneeded rule.”

Kennedy said the are for emissions of nitrogen oxide from the regulated fleets to fall well below the levels that the state has targeted in each and every year through 2025. The state now predicts that emissions of particulate matter will fall below the targeted levels through 2015 and will remain close to those targets through 2025.

The state agency revised its diesel emissions estimates after an analysis of the state’s original “emissions inventory” found significant flaws in the state’s data. That , conducted by Sierra Research on behalf of the Associated General Contractors of America, found that the state has systematically over–estimated diesel emissions from off–road equipment by a factor of 3.5. The new data that the state released today essentially confirms that finding, association officials noted.

“The good news is that thousands of construction workers won’t have to lose their jobs on account of bad science and erroneous estimates,” said Kennedy. “The construction industry is now eager to work with the board to find ways to meet ambitious environmental goals and still protect the state’s remaining construction jobs.”

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