Wisconsin Administrative Code › Department of Natural Resources › NR 600-699 - Environmental Protection - Hazardous Waste Management › Chapter NR 665 - Interim License Hazardous Waste Treatment, Storage And Disposal Facility Standards › Appendix V - EXAMPLES OF POTENTIALLY INCOMPATIBLE WASTE

Current through June 24, 2024
Many hazardous wastes, when mixed with other waste or
				  materials at a hazardous waste facility, can produce effects which are harmful
				  to human health and the environment, such as (1) heat or pressure, (2) fire or
				  explosion, (3) violent reaction, (4) toxic dusts, mists, fumes or gases or (5)
				  flammable fumes or gases.
Below are examples of potentially incompatible wastes, waste
				  components, and materials, along with the harmful consequences which result
				  from mixing materials in one group with materials in another group. The list is
				  intended as a guide to owners or operators of treatment, storage and disposal
				  facilities, and to enforcement and license granting officials, to indicate the
				  need for special precautions when managing these potentially incompatible waste
				  materials or components.
This list is not intended to be exhaustive. An owner or
				  operator shall, as the rules require, adequately analyze that person's wastes
				  in order to avoid creating uncontrolled substances or reactions of the type
				  listed below, whether they are listed below or not.
It is possible for potentially incompatible wastes to be
				  mixed in a way that precludes a reaction (e.g., adding acid to water rather
				  than water to acid), neutralizes them (e.g., a strong acid mixed with a strong
				  base) or controls substances produced (e.g., by generating flammable gases in a
				  closed tank equipped so that ignition cannot occur, and burning the gases in an
				  incinerator).
In the lists below, the mixing of a Group A material with a
				  Group B material may have the potential consequence as noted.
Group 1-A
Group 1-B
Acetylene sludge
Acid sludge
Alkaline caustic liquids
Acid and water
Alkaline cleaner
Battery acid
Alkaline corrosive liquids
Chemical cleaners
Alkaline corrosive battery fluid
Electrolyte, acid
Caustic wastewater
Etching acid liquid or solvent
Lime sludge and other
corrosive alkalies
Lime wastewater
Pickling liquor and other
corrosive acids
Lime and water
Spent acid
Spent caustic
Spent mixed acid
Spent sulfuric acid
Potential consequences: Heat generation; violent
				  reaction.
Group 2-A
Group 2-B
Aluminum
Any waste in Group 1-A or 1-B
Beryllium
Calcium
Lithium
Magnesium
Potassium
Sodium
Zinc powder
Other reactive metals and metal hydrides
Potential consequences: Fire or explosion; generation of
				  flammable hydrogen gas.
Group 3-A
Group 3-B
Alcohols
Any concentrated waste in
Group 1-A or 1-B
Water
Calcium
Lithium
Metal hydrides
Potassium
SO2Cl2,
								SOCl2, PCl3,
								CH3SiCl3
Other water-reactive waste
Potential consequences: Fire, explosion or heat generation;
				  generation of flammable or toxic gases.
Group 4-A
Group 4-B
Alcohols
Concentrated Group 1-A or
1-B wastes
Aldehydes
Group 2-A wastes
Halogenated hydrocarbons
Nitrated hydrocarbons
Unsaturated hydrocarbons
Other reactive organic compounds and
								solvents
Potential consequences: Fire, explosion or violent
				  reaction.
Group 5-A
Group 5-B
Spent cyanide and sulfide solutions
Group 1-B wastes
Potential consequences: Generation of toxic hydrogen cyanide
				  or hydrogen sulfide gas.
Group 6-A
Group 6-B
Chlorates
Acetic acid and other organic acids
Chlorine
Concentrated mineral acids
Chlorites
Group 2-A wastes
Chromic acid
Group 4-A wastes
Hypochlorites
Other flammable and combustible wastes
Nitrates
Nitric acid, fuming
Perchlorates
Permanganates
Peroxides
Other strong oxidizers
Potential consequences: Fire, explosion or violent
				  reaction.
The source of this appendix is "Law, Regulations, and
					 Guidelines for Handling of Hazardous Waste", California department of health,
					 February 1975.