If the commissioner or his duly authorized agent finds that any person is conducting any activity or maintaining a facility or condition which is in violation of section 26-311, the commissioner shall issue a written order by certified mail to such person to cease immediately such activity or to correct such facility or condition. Within ten days of the issuance of such order the commissioner shall hold a hearing to provide the person an opportunity to be heard and show cause why the order should not remain in effect. The commissioner shall consider the facts presented at the hearing and within ten days of the completion of the hearing notify the person by certified mail that the original order remains in effect, that a revised order is in effect, or that the order has been withdrawn. The original order shall be effective upon issuance and shall remain in effect until the commissioner affirms, revises or withdraws the order. The issuance of an order pursuant to this section shall not delay or bar an action pursuant to section 26-40c.