ORS § 459.385
Personnel of the Department of Environmental Quality or a local health department, authorized environmental health specialists or other authorized personnel of a city or county may enter upon the premises of any person regulated under ORS 459.005 to 459.105, 459.205 to 459.385, 466.005 to 466.385 and 466.992 or under regulations adopted pursuant to ORS 450.075, 450.810, 450.820 and 451.570, at reasonable times, to determine compliance with and to enforce ORS 450.075, 450.810, 450.820, 451.570, 459.005 to 459.105, 459.205 to 459.385, 466.005 to 466.385 and 466.992 and any rules or regulations adopted pursuant thereto. The department shall also have access to any pertinent records, including but not limited to blueprints, operation and maintenance records and logs, operating rules and procedures. As used in this section, "pertinent records" does not include financial information unless otherwise authorized by law.
ORS 459.385