Hawaii Administrative Rules › Title 11 - DEPARTMENT OF HEALTH › Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS › Chapter 265 - HAZARDOUS WASTE MANAGEMENT INTERIM STATUS STANDARDS FOR OWNERS OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE AND DISPOSAL FACILITIES › Appendix V to Part 265 - Examples of Potentially Incompatible Waste

Current through June, 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 permit 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 must, as the regulations require, adequately analyze his wastes so
				  that he can 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) or that neutralizes them (e.g., a strong acid mixed with a
				  strong base), or that 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
Akaline 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 alkalines
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 Groups 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
Hyphochlorites
Other flammable and combustible wastes
Nitrates
Nitric acid, fuming
Perchlorates
Permanganates
Peroxides
Other strong oxidizers
Potential consequences: Fire, explosion, or violent
				  reaction.
"Law, Regulations, and Guidelines for Handling of
					 Hazardous Waste." California Department of Health, February 1975.