4. Where a temporary interruption of service is necessary for repair, maintenance or improvement purposes of a waterworks or sewer system, the person in charge must send a notice of interruption to the persons served at least 10 days before interrupting the service.
If an interruption of service must be made urgently due to unforeseeable circumstances, the person in charge may proceed immediately with the interruption by informing the persons served by any appropriate means. As soon as the person in charge is aware that the duration of the interruption of service will extend to the following day, the person must send a notice of interruption of service to the persons served.
The person in charge must, in the notice of interruption, specify the nature of the work, the estimated time for the interruption of service and the measures that will be set up to ensure the sanitation of the premises. Where the interruption of service extends beyond the first day, the notice must specify the measures that will be implemented to ensure access to alternate services during the work.
The person in charge must again notify the persons served as soon as the person in charge is aware that the duration of the interruption of service will be longer than the time estimated in the notice of interruption. The measures set up to ensure the sanitation of the premises and, as the case may be, access to alternate services must be maintained until the end of the work.
Despite the first to the fourth paragraphs, where the interruption of service concerns a sewer system intended only for fire protection, the person in charge must inform, by any appropriate means, the persons served of the interruption and specify the estimated duration of the work.