Solid or viscous wastes. Solid or viscous wastes which
will or may cause obstruction to the flow in a sewer or otherwise
interfere with the proper operation of the treatment works. Prohibited
materials include but are not limited to grease, improperly shredded
garbage, animal guts or tissues, diseased human organs or tissue fluids,
paunch manure, bones, hair, hides or fleshings, entrails, whole blood,
feathers, ashes, cinders, sand, spent lime, stone or marble dust,
metal, glass, straw, shavings, grass clippings, rags, spent grains,
spent hops, wastepaper, wood, plastic, tar, asphalt residues, residues
from refining or processing of fuel or lubricating oil and similar
substances.