Opinion ID: 365968
Heading Depth: 4
Heading Rank: 2

Heading: Persistence

Text: 102 EPA summarized studies showing that PCBs tend to accumulate in the environment over many years, are mobile, and adhere to sediments. 102 This court has noted before that such characteristics intensify the dangers posed by toxic substances, because they increase the exposure of persons and vulnerable organisms of all kinds to those substances. See EDF v. EPA (heptachlor and chlordane), 179 U.S.App.D.C. at 53, 548 F.2d at 1008; EDF v. EPA (aldrin and dieldrin), 167 U.S.App.D.C. at 73, 510 F.2d at 1301. 103 Accordingly, these studies provide support for EPA's prohibition. 103