CHARLTON — Richard Scanlon worries when his grandchildren swim in his pool.
He worries he won’t hear them if something goes wrong, because of constant buzzing from the Northeast Energy Center liquified natural gas plant, about 600 feet from his home here in the Worcester County town of Charlton just north of the town line with Southbridge.
The $100 million plant on Route 169 opened in 2024 and creates, stores and ships liquefied natural gas…