Subject to conformance with the performance standards specified in Section 17.46.080, the following principal uses are permitted in an M-2 district:

    A.    Railroad or trucking terminal facility;

    B.    Public utility;

    C.    Wholesale establishment;

    D.    Research laboratory;

    E.    Parking lot;

    F.    Any manufacturing, processing or assembly plant, or industrial operation, except those listed in Section 17.46.030. (Prior gen. code § 8-52.1)