Known to or reasonably ascertainable by
Known to or reasonably ascertainable by means all information in a person's possession or control, plus all information that a reasonable person similarly situated might be expected to possess, control, or know.
Source
40 CFR § 720.3
Scoping language
In addition to the definitions under section 3 of the Act, 15 U.S.C. 2602, the following definitions apply to this part.