(a) For the purpose of developing or enforcing any regulation, permit or other requirement authorized by this chapter, any duly authorized employee of the Department may, upon presentation of appropriate credentials at any reasonable time:
(1) Enter any place or conveyance where hazardous wastes are generated, stored, transported, treated or disposed of;
(2) Inspect and obtain samples from any person of any such wastes and samples of any containers or labeling for such wastes, and prior to leaving the premises, give to the owner, operator or agent in charge a receipt describing the sample obtained, and if requested, a portion of each such sample equal in volume or weight to the portion retained. If any analysis is made of such samples, a copy of the results of such analysis shall be furnished promptly to the owner, operator or agent in charge;
(3) Inspect and copy any records, reports, information or test results relating to the purposes of this chapter.
(b) Upon any refusal of entry, inspection, sampling or copying pursuant to this section, a duly authorized employee of the Department may apply for and obtain a warrant to allow such entry, inspection, sampling or copying in the manner established by the rules and law of criminal procedure.
(c) No duly authorized employee of the Department who enters upon premises, vehicles or equipment for purposes set forth in subsection (a) of this section shall have a cause of action against the owner, operator or occupier thereof for any injuries or damages sustained by such person while on the premises, vehicles or equipment unless such injuries or damages were intentional on the part of the owner, operator or occupier or were caused by the willful or wanton disregard of the rights of others.