Solid or viscous substances which may cause obstruction to the flow
in a sewer or other interference with the operation of the wastewater
treatment facilities, such as, but not limited to, grease, garbage
with particles greater than 1/2 inch in any dimension, animal guts
or tissues, paunch, manure, bones, hair, hides, spent lime, stone
or marble dust, metal, glass, straw, shavings, grass clippings, rags,
spent grains, spent hops, wastepaper, wood, plastics, solvents, gasoline,
any petroleum-based product, antifreeze, oil-based paints, tar, asphalt,
residues, residues from refining or processing of fuel, lubricating
oil, mud, glass grindings, polishing wastes, fur ashes incinerator
residue, dredged spoil, solid waste, construction materials, rock,
sand, cellar dirt, feathers, wood, tar, cinders, medical waste or
any other harmful chemicals.