FILE - EPA Administrator Michael Regan, left, arrives at the Fifth Ward Elementary School, which is near the Denka plant, with Robert Taylor, second left, founder of Concerned Citizens of St. John's Parish, and Lydia Gerard, third left, a member of the group, in Reserve, La., Nov. 16, 2021. (AP Photo/Gerald Herbert, File)

FILE - The Fifth Ward Elementary School and residential neighborhoods sit near the Denka Performance Elastomer Plant, background, in Reserve, La., Sept. 23, 2022. (AP Photo/Gerald Herbert, File)

FILE - The Denka Performance Elastomer Plant sits at sunset in Reserve, La., on Sept. 23, 2022. (AP Photo/Gerald Herbert, File)

FILE - The Denka Performance Elastomer Plant sits at sunset in Reserve, La., Friday, Sept. 23, 2022. (AP Photo/Gerald Herbert)

FILE - Kole Jones, great grandson of Lydia Gerard, left, a member of Concerned Citizens of St. John the Baptist Parish, plays with a toy as she and fellow residents speak to reporters in Reserve, La., near the Denka Performance Elastomer Plant on Sept. 15, 2022.(AP Photo/Gerald Herbert)