The Environmental Protection Agency said the plan proposed by the utility’s construction manager to remediate PCBs in the old paint doesn’t meet the EPA’s standards, according to Mark Biron, Groton Utilities general manager of operations for water and electric. Construction has been ongoing on the upgrade project to repurpose the water treatment plant, built in 1939 and expanded over the years, while building a new facility, adjacent to the old plant, to treat and process water. Biron said PCBs only would become an issue if a surface is disturbed. When workers do activities, such as sanding, drilling or grinding materials containing PCBs, it’s in a controlled environment. They follow all the Occupational Safety and Health Administration requirements, including wearing protective clothing and protecting their skin, face and eyes, and use a filter to suck up the particles.