How have courts interpreted the meaning of the word "imminence" in the context of environmental protection legislation?

in harm to the public [or the environment]." Id. (internal citations and quotations omitted). "Imminence refers 'to the nature of the threat rather than identification of the time when the endangerment initially arose.'" Id. (citing United States v. Price, 688 F.2d 204, 213 (3d Cir. 1982)). Further,