Any ashes, cinders, stones, sand, mud, straw, shavings or sawdust,
metal, sticks, coarse rubbish, glass, rags, tar, feathers, plastics,
waste rubber, animal guts or tissues, entrails, blood, hair, hides,
wood, paunch manure or any other substance likely to damage, destroy
or cause an obstruction to the flow in any sewer or which may interfere
with the proper operation of the sewerage works.