Detailed construction plans and specifications for proposed public and private sewers shall be prepared by a professional engineer registered in the State of Oregon, and shall be subject to review and approval by the city and Department of Environmental Quality. Each person shall notify the city in writing of his or her intention to prepare construction plans and specifications delineating the boundaries of the areas to be served by map, sketch or written description. Within 10 calendar days following receipt of the notice, the city shall make a written request for the submission of these plans and specifications. The person shall submit 2 sets of plans and specifications and shall obtain approval thereof and a permit to construct prior to advertising for bids. Within 21 calendar days following receipt of the plans and specifications, the city shall review same and return 1 set thereof to the person with approval or required changes indicated. If the plans and specifications are disapproved, the required changes shall be made by the person and all required revisions of plans and specifications resubmitted in the same manner as provided for the initial submittal. In the event no communication is received from the city by the person within 21 calendar days of the date of submission of the plans and specifications, it shall be deemed that the city has not approved the plans and specifications and will not issue a construction permit.