Americ An Gypsum, Albuquerque, n ew m exico Arsenic c ont Amin Ation e xceeds d rinking WAter s t And Ards In April 2006, American Gypsum signed a contract with Evoqua Water Technologies, formerly USFilter, for the purchase of a media filtration system to remove arsenic contamination from the company’s on-site well. The customer had recorded arsenic levels of 16 ppb in their groundwater supply. This was naturally occurring arsenic due to lo

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