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ARB chair, construction industry, announce deal on diesel emissions

October 7, 2010

California’s top air quality regulator and the head of a major construction industry trade group announced Thursday that they have reached agreement on a plan to reduce diesel emissions from construction equipment. The agreement, if approved by the full Air Resources Board in December, would end years of dispute between the board and the Associated General Contractors of America, which has fought California’s diesel emission regulations for construction equipment since they were adopted in 2007.

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ARB: fine particle pollution kills 9,200 per year

September 14, 2010

More than 9,000 Californians are dying prematurely every year because of the health effects of the kind of pollution emitted by diesel trucks and heavy equipment, according to a new study by the Air Resources Board, the state’s air quality regulator. The study is the first released by the state to claim that the microscopic particles emitted by engines burning diesel fuel actually cause early deaths, rather than simply being correlated with them.

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ARB concedes error in off-road truck rule, plans to revise regulation

August 31, 2010

The California Air Resources Board acknowledged something Tuesday that critics have been saying for months: the state vastly over-estimated the amount of diesel pollution emitted by big off-road construction vehicles. The error, contained in an ARB computer model and compounded by a recession that idled far more trucks than expected, means that the construction industry would come close to meeting state-mandated targets for reducing pollution through 2025 even if regulations designed to force firms to retire or retrofit their dirtiest trucks are repealed.

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Air board might roll back off-road diesel rule

March 9, 2010

California’s Air Resources Board is coming under increasing pressure from construction industry contractors seeking to roll back regulations adopted three years ago to sharply reduce the amount of diesel pollution from big off-road tractors, scrapers and earth-movers. The agency has acknowledged that it underestimated the effects of the recession on diesel emissions and is also studying claims that assumptions in a faulty computer model further inflated estimates of pollution caused by the vehicles.

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