In any case where application for water service (other than private fire protection service or any public fire hydrant service) requires a main extension, except in a case involving an application to serve a subdivision, tract or organized service district, the water department will extend the city’s water mains to a new consumer upon payment by him in cash as a connection charge of the reasonable estimated cost of extension (including connection charges as established in Sections 15.08.010 through 15.08.060), and if required by the water department, any costs of increasing the size of capacity of the city’s existing water mains or any other facilities used or necessary for supplying the proposed extension. The application shall be accompanied by a fee of one hundred dollars or eight percent of the estimated cost of the extension, whichever is the greater. The size, type, quality of materials, location of mains and contract plans and specifications for the same will be prepared by the manager, and the actual construction will be done by the water department or a person acceptable to the manager. Applicant may, subject to the approval of the manager, cause to be prepared contract plans and specifications for the construction of the main or mains in such form and detail as the manager may specify. In such event, a fee of two percent of the estimated cost of construction shall accompany the application in lieu of the one hundred dollars or eight percent as set forth above. No portion of the application fee herein required shall be refundable for any reason unless the applicant otherwise qualifies for a refund agreement under the provisions of this chapter pertaining to subdivision maps and has made a final map of record. Adjustment of any substantial differences between the estimated and the reasonable actual cost of such extension, will be made within ninety days after completion of the extension. Such connection charge shall not be otherwise subject to refund. (Ord. 675 NCS §3; Ord. 589 NCS §1; Ord. 544 NCS §11; prior code §27.17(2).)