All State mine inspectors, the Department of Labor and other inspectors required to inspect places and kinds of business required by this act to be provided with washrooms, shall inspect such washrooms at frequent intervals and report to the owner or operator, the sanitary and physical condition thereof in writing, and make recommendations as to such improvements or changes as may appear to be necessary for compliance with this Act. Any such inspector may lock and close any washroom found to be in violation of this Act, and may institute proceedings to enforce the penalty provided in Section 4.