Municipal separate storm sewer system” or “MS4” means the conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): (1) owned or operated by the Fairbanks North Star Borough; (2) designed or used for collecting or conveying storm water; (3) which is not a combined sewer; (4) which is not part of a publicly owned treatment works as defined at 40 CFR Section 122.2; and, (5) which discharges to waters of the United States.