§ 442.1 General applicability.

(a) As defined more specifically in each subpart, and except for discharges specified in paragraph (b) of this section, this part applies to discharges resulting from cleaning the interior of tanks used to transport chemical, petroleum or food grade cargos. This part does not apply to facilities that clean only the exteriors of transportation equipment. Operations which may be subject to this part typically are reported under a wide variety of Standard Industrial Classification (SIC) codes. Several of the most common SIC codes include: SIC 7699, SIC 4741, or SIC 4491 (1987 SIC Manual).