Any area served by two or more sewerage and/or water distribution facilities constructed under separate recoupment agreements with the city, the recoupment charges payable to each sponsor shall be divided proportionately between said sponsors based upon the ratio of total recoupable amount for each sewerage and/or water facility to the sum of the total recoupable amounts for all of the sewerage facilities or water facilities serving the area which are subject to recoupment. (Ord. 1754 § 1 (part), 1999)