EPA affirms pH 12.5 corrosivity; averts new cement, concrete handling burdens

Sources: CP staff; U.S. Environmental Protection Agency; National Ready Mixed Concrete Association, Alexandria, Va.; CP staff The U.S. Environmental Protection Agency has formally denied a 2011 rulemaking petition that sought to “revise the regulatory threshold for defining waste as corrosive from the current value of pH 12.5, to pH 11.5; and expand the scope of the Resource Conservation and Recovery…

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