Waste DisposalWaste is considered hazardous if:
1. It is on either of two lists of specific chemical substances developed by the Federal Environmental Protection Agency (EPA). Most commonly used organic solvents (e.g. acetone, methanol, toluene, xylene, methylene chloride etc.) are
2. It is on a list of nonspecific sources that includes a broad range of spent halogenated and non-halogenated solvents.
3. It is on a list of specific sources that includes primarily industrial processes.
4. It exhibits any of the following characteristics as defined by the EPA.
A liquid with a flash point less than 60oC not a liquid and capable under normal conditions of causing fire through friction, absorption of moisture or spontaneous chemical changes an ignitable compressed gas an oxidizer.
It is aqueous and has a pH less than or equal to 2 or greater than or equal to 12.5. It is a liquid and corrodes steel at a rate greater than 0.25 inches per year at 55oC.
It is normally unstable, reacts violently with water, forms potentially explosive mixtures with water, generates toxic gases, vapors or fumes when mixed with water cyanide or sulfide wastes that generate toxic gases, vapors or fumes at pH conditions between 2 and 12.5. It is capable of detonation or explosive decomposition if subjected to strong initiation or under standard temperature and pressure.
- Toxicity Characteristic
If an extract of the waste is found to contain certain metals, pesticides or selected organics above specified levels.
Packaging Chemical Wastes
Materials that are to be disposed of as hazardous
waste should be placed in containers of one gallon or less, with adequate
closures. Corks or parafilm are not considered adequate. Often the original
container is perfectly acceptable. Containers must be kept closed except
during actual transfers. The container should not react with the waste
being stored (e.g. no hydrofluoric acid in glass).
Labeling of Chemical Waste Containers
Waste containers must be labeled with the words
HAZARDOUS WASTE along with the names of the principal chemical constituents
and the approximate percentage. Do not list reactants, only products.
Use IUPAC or common names not symbols, structural diagrams or product trade
names. Labeling should be accurate and legible and should include
the name of the generator and an extension where someone who is knowledgeable
about that specific waste can be reached on the day of the pickup in case
questions arise during packaging for