The authorized representative of the department, upon presentation of the representative's credentials, may at reasonable times enter upon any public or private property to: (1) investigate conditions relating to pollution of state waters or violations of permit conditions; (2) have access to and copy any records required under this chapter; (3) inspect any monitoring equipment or method required under 75-5-602(3); and (4) sample any effluents that the owner or operator of the source is required to sample under 75-5-602(4).