Any ashes, cinders, sand, mud, straw, shavings, metal,
glass, rags, bones, feathers, tar, plastic, wood, paunch manure, butcher's
offal, whole blood, bentonite, lye, building materials, rubber, hair,
leather, porcelain, china, ceramic wastes, asphalt, paint, waxes or
any other solid or viscous substance which shall be capable of causing
obstruction to the flow in any sewer or other interference with the
proper operation of the sewer system or the sewage treatment plant.