When the 14 operators at the Joseph Jensen Treatment Plant faced a major disinfection system upgrade in 2005, they rose to the occasion. They were challenged by a learning curve and a tight window to conduct acceptance testing and meet the disinfection byproducts regulation.
“We had been using free chlorine, but upgraded to ozone to improve the water quality and meet increasingly stringent regulations,” says Heather Collins, water treatment section manager for the Metropolitan Water District (MWD) in Los Angeles, which owns the Jensen plant in Granada Hills. “It took a lot of work for operators to learn the new system
