Senator Charles Schumer spoke out this week about the utility poles installed by PSEG Long Island throughout East Hampton and across Long Island, calling a chemical used to treat the wooden poles “highly toxic” and “known to cause serious health issues,” and urging the federal Environmental Protection Agency to investigate its use immediately. He demanded that PSEG suspend the use of the chemical, penta, on utility poles, and halt further pole installation until the E.P.A. investigation is complete.