Solid or viscous substance 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 particle greater than one-half inch in any dimension,
animal guts or tissues, 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, plastics, gas, tar,
asphalt residues, residues from refining, or processing of fuel or
lubricating oil, mud, or glass grinding or polishing wastes.