Uses permitted in the M-2 District shall be as follows:
Accessory buildings and uses, except that accessory buildings may not be located in a required front or side yard, but may occupy not more than thirty percent of a required rear yard, and may not be closer than three feet to any lot line.
(a) Accessory uses, provided that no accessory buildings shall be located in any required yard.
(b) Agriculture
(c) Asphalt mixing plant.
(d) Automobile repair garages, provided that outdoor storage of materials or items being repaired are not within required front yards.
(e) Billboards
(f) Boiler works.
(g) Bottling works.
(h) Bulk storage of petroleum products.
(i) Carting, express or hauling establishments.
(j) Cement or cinder block manufacture.
(k) Coal and building material storage and wholesaling, provided that materials are not stored in required front yards.
(l) Commercial dry cleaning plants.
(m) Contractors' establishments and construction equipment dealers, provided that material or equipment is not stored in required front yards.
(n) Distributors' warehouses and wholesale outlets with no outdoor storage, and no processing or fabrication.
(o) Fat rendering or lard refining.
(p) Glass manufacture.
(q) Glucose, dextrin or starch manufacture.
(r) Industrial plants manufacturing or assembling the following: boats; small metal products such as bolts, nuts, screws, washers, rivets, nails, etc. ; clothing; drugs and medicines; electrical equipment; glass products from previously manufactured glass; furniture and wood products; and plastic products for production of finished equipment.
(s) Iron, steel, brass or copper foundry.
(t) Kennels, animal hospitals and veterinary offices provided that outside runs and kennels are not within 400 feet of any residential zoning district.
(u) Metal stamping.
(v) Monument works with or without retail outlet on premises.
(w) Other activities and manufacturing plants having performance characteristics similar to those listed in this section. When the Zoning Administrator has difficulty determining whether or not a proposed use meets the performance characteristics required for this District, he shall have the applicant for the proposed use apply to the Board of Appeals to make the determination.
(x) Paint, oil, shellac, varnish or turpentine manufacture.
(y) Paper manufacture.
(z) Parks, playgrounds and community buildings owned or operated by public agencies.
(aa) Plant nurseries and greenhouses.
(bb) Printing Plant
(cc) Radio and television broadcasting stations and towers
(dd) Sauerkraut or pickle, etc., manufacture.
(ff) Stone mill.
(gg) Utilities, including railroad terminal facilities.
(hh) Utility facilities necessary for local service to the adjacent area.
(ii) Warehouses