Upon determination by the WRD Manager that a violation has occurred or is occurring, the WRD Manager may issue a notice of violation to the user which outlines the violation and the potential liability as well as any proposed enforcement actions. The notice may further require correction of the violation within a specified period of time, and may require written confirmation of the correction and a description of the efforts made to correct the violation. The notice shall be personally delivered to the user’s premises or be sent by certified mail. In an emergency, notice may be given orally, but shall be confirmed in writing at the earliest practical time. Notice by mail is presumed to be received by the addressee on the third day after mailing.