(a) Any duly authorized officer, employee or representative of the department may enter and inspect any property, premises or place on, or at, which an air contaminant source is located or is being constructed, installed or established, at any reasonable time, for the purpose of ascertaining the state of compliance with this chapter and rules and regulations in force pursuant thereto. No person shall refuse entry or access to any authorized representative of the department who requests entry for purposes of inspection, and who presents appropriate credentials, nor shall any person obstruct, hamper or interfere with any such inspection. If requested, the owner or operator of the premises shall receive a report setting forth all facts found which relate to compliance status.

(b) The department may conduct tests and take samples of air contaminants, fuel, process material or other material which affects, or may affect, emission of air contaminants from any source. Upon request of the department, the person responsible for the source to be tested shall provide necessary holes in stacks or ducts and such other safe and proper sampling and testing facilities, exclusive of instruments and sensing devices as may be necessary for proper determination of the emission of air contaminants. If an authorized employee of the department during the course of an inspection obtains a sample of air contaminant, fuel, process material or other material, he shall give the owner or operator of the equipment or fuel facility a receipt for the sample obtained.