THE FOUR HAZARDOUS WASTE CATEGORIES THAT NEED FORM 4 ARE
Ignitability ( something flammable): There are three kinds of ignitable forms-
Liquid with flash point- the lowest temperature at which the fumes above the waste ignite, 60 degrees Celsius or 140 degrees Fahrenheit. Examples are alcohol, gasoline, and acetone. Solids that spontaneously combust Compressed gases and oxidizers.
Corrosivity (something that can decompose or rust): Corrosive substances like hydrochloric acid, nitric acid, and sulphuric acid can cause the leakage of harmful materials. It is any liquid with a pH of less than or equal to two or greater than or equal to 12.5 or can corrode steel. Battery and rust removers are everyday examples of corrosives in daily life.
Reactivity (something explosive): With instability, reactive wastes can be very harmful. There are many conditions and situations to identify all kinds of reactive materials. The following guidelines are considered-
Unstable, and routinely experiences violent change without detonating Potential for explosive mixture or violent reaction when mixed with water Toxic gases are released when mixed with water.
Toxicity: Poisonous materials threaten the groundwater and can have longterm adverse effects on the health of humans and the environment. There are sixty contaminants in the toxicity characteristics list. This is different from the above three categories. These contaminants are tracked solely via a test method called the toxicity characteristic leaching procedure.
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