These flow charts guide the user through a systematic decision-making process for categorizing the wastes. This process is discussed in more detaiI in the following sections. Materials which are solid wastes are identified in Figure II-1 . Several types of materials are specifically excluded from the definition of solid waste under R.61-79.261.4. These waste types are listed in Figure II-2 .
Some recycled materials are also exempt from the definition of a solid waste.
Figure II-4 outlines the procedure for determining which solid wastes are also hazardous wastes. There are two different ways a waste can be classified as a hazardous waste. If a waste is included in any of these lists, and in the case of U and P listed wastes it is un-used, it is a listed hazardous waste. Spent halogenated solvents used in degreasing . It is also necessary to determine if a waste is a characteristic hazardous waste.