California Code of Regulations › Title 22 - Social Security › Division 4.5 - Environmental Health Standards for the Management of Hazardous Waste › Chapter 15 - Interim Status Standards for Owners and Operators of Hazardous Waste Transfer, Treatment, Storage, and Disposal Facilities › Article 18 - Environmental Monitoring of Air and Soil-Pore Gas for Interim Status Facilities › Appendix V

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
Examples of Potentially Incompatible Waste
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 transfer, 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 shall, 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
Pickling liquor and
Lime sludge and other
other corrosive acids
corrosive alkalies
Spent acid
Lime wastewater
Spent mixed acid
Lime and water
Spent sulfuric acid
Spent caustic
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
Potassium
PCl sub3, CH sub3 SiCl sub3
Metal hydrides
SO sub2 Cl sub2, SOCl sub2,
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
Chlorine
other organic
Chlorites
acids
Chromic acid
Concentrated
Hyphochlorites
mineral acides
Nitrates
Group 2-A wastes
Nitric acid, fuming
Group 4-A wastes
Perchlorates
Other flammable and
Permanganates
combustible wastes
Peroxides
Other strong oxidizers
Potential consequences: Fire, explosion, or violent
								reaction.
Source: "Law, Regulations, and Guidelines for Handling of
					 Hazardous Waste." California Department of Health, February
					 1975.
Note: Authority cited: Sections 208, 25150 and 25159,
						Health and Safety Code. Reference: Sections 208, 25159 and 25159.5, Health and
						Safety Code; 40 CFR Part 265, Appendix
						V.