At any time when a discharge has occurred or appears imminent, the department and the Department of Environmental Conservation shall be provided with access to any facility, major or otherwise, for the purposes of taking all actions necessary for the prevention of a discharge, the cleanup and removal of a discharge, and ascertaining of the source and cause of the discharge.
N.Y. Comp. Codes R. & Regs. Tit. 17 § 32.6