Stormwater, surface water, roof runoff, groundwater or subsurface drainage which at the time of adoption of this ordinance codified in this chapter drains into a sanitary sewer, may continue to so drain if a special temporary permit has been obtained from the Director of Public Works. Permits will not be automatically issued and may be issued only when, in the opinion of the Director of Public Works, the denial of a permit would result in extreme hardship, in hazard to property, or in similar conditions. Such permit shall be revocable at any time. In the event of revocation, the permittee shall comply with Section 17.06.020 within one hundred eighty days of personal service or mailing of such revocation. (Ord. 5030-NS § 9, 1978)