Preliminary Assessment of Chromium Emissions from Chromium Electroplating Faci Lities
نویسنده
چکیده
The United States Environmental Protection Agency (EPA) intends to add either chromium or hexavalent chromium to the list of hazardous air pollutants under Section 112 of the Clean Air Act. A preliminary assessment performed by EPA has identified several categories of stationary sources as emitters of significant quantities of chromium to the atmosphere and for which the proposal o f national emission standards seem warranted. electroplating o f chromium from conventional chromic acid baths. Included among these source categories is the This paper presents the findings of EPA's preliminary assessment as it pertains to chromium electroplating. There are an estimated 9,700 chromium electroplating operations in the U.S. Collectively, based on the levels of control estimated to be currently in place, these operations emit about 62 tons of hexavalent chromium per year. These emissions result in an estimated annual Incidence of 32 statistical lives lost per yefr and a maximum lifetime risk to the most exposed that may exceed 1 x10' . Additional control is available at what appears to be reasonable cost. would result in risk reductions across the source category ranging from about 75 to 90 percent. The implementation of these additional controls
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