"Yard clippings" means leaves, grass clippings, vegetable or other garden debris, shrubbery, or brush or tree trimmings, less than 4 feet in length and 2 inches in diameter, that can be converted to compost humus. Yard clippings do not include stumps, agricultural wastes, animal waste, roots, sewage sludge, or garbage. Yard clippings are defined in Section 324.11506(14) of Part 115.
Garbage means rejected food wastes including waste accumulation of animal, fruit, or vegetable matter used or intended for food or that attends the preparation, use, cooking, dealing in, or storing of meat, fish, fowl, fruit, or vegetable matter. Garbage is defined in Section 324.11503(17) of Part 115.
Sewage sludge means any solid or semisolid waste that is generated from a municipal, commercial, or industrial wastewater treatment plant. Sludge is defined in R 299.4105(e) of the Part 115 Administrative Rules promulgated pursuant to Part 115.