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Definitions of Hazardous Waste 

Characteristic Hazardous Waste


If the waste exhibits a hazardous characteristic, it is a characteristic hazardous waste.

Characteristic

Description

Examples

Waste Codes

Ignitable

Flash point < 140 ºF,
solid oxidizers

Solvents, alcohols, aerosol can residues, pool sanitizers

D001

Corrosive
 (acidic or caustic)

pH < 2 or pH > 12.5

Drain cleaners, lab and pool acids, rust removers, water treatment chemicals, etc.

D002

Reactive

Cyanides, sulfides, compressed gasses, materials that react spontaneously or with water

Explosives, old unstable chemicals (old ethers, picric acid), water-reactive metals, some nitrogen compounds (including some fertilizers), aerosol cans

D003

Toxic: Test a sample of the material to determine whether it contains metals or pesticides at levels above those listed in 40 CFR 261.24

Lead paint, photographic fixers, some fluorescent lamps, chromium-based corrosion inhibitors, solders, pesticides

D004–D043


Listed Hazardous Wastes


These are specific wastes or kinds of wastes. The chemicals or constituents of the waste appear in lists in the regulations. Thus, these are listed hazardous wastes. There are four lists of hazardous chemicals; three may occur on your campus. The fourth list, the K-list, is wastes from specific industrial processes.

List

Description
(see 40 CFR 261.25)

Examples

Waste Codes

Waste solvents
(F-list)

Specific solvents and mixtures

Parts cleaners, methylene chloride, xylol, acetone, alcohol used as a solvent, etc.

F001–F006

Waste chemicals
(U-list)

Chemicals when they are outdated or no longer needed and in which the listed chemical is the sole active ingredient

Outdated photo products, excess lab chemicals, unused pesticides, etc.

U001–U409

Acute hazardous waste chemicals
(P-list)

Some unused reagents, some unused pesticides, etc.

P001–P205

Note: Wastes may exhibit multiple characteristics. Unneeded and unused products and wastes that exhibit a characteristic may also be listed wastes. There are other waste codes. The full regulatory text and listings for hazardous waste determinations are in 40 CFR 261.


RCRA Hazardous Waste Generator Status and Management Requirements*

Generator status is based on the quantity of waste generated in a calendar month, per site.

 

Conditionally Exempt Small-Quantity Generator

Small-Quantity Generator

Large-Quantity Generator

Monthly generation of hazardous waste other than acute hazardous waste

Less than 100 kg
(220 lb.), about one-half of a 55-gallon drum

Less than 1,000 kg (2,200 lb.), about five 55-gallon drums

More than 1,000 kg (2,200 lb.), more than five 55-gallon drums

Monthly generation of acute hazardous waste

Less than 1 kg (2.2 lb.), about 1 quart

More than 1 kg (2.2 lb.)

Time limit for storage without a permit

None

180 days (270 days if disposal facility is distant)

90 days

Hazardous waste storage weight limits (not acute hazardous waste)

Less than 1,000 kg (2,200 lb.)

Less than 6,000 kg (13,200 lb.)

No federal limit; states may have limits

Acute hazardous waste storage weight limit

Less than 1 kg (2.2 lb.)

No federal limit; states may have limits

Preparedness and prevention

Not required

Required

Required

Contingency plan

Not required

Not required

Required

Biennial reporting

Not required

Not required

Required

Personnel training

Not required

Per responsibilities

Full, per responsibilities

Waste minimization plan

Not required

“Good faith effort” required

Required

Emergency coordinator

Not required

Required

Required

Written agreements with offsite responders

Not required

Required

Required

Use of hazardous waste manifests and land disposal restriction documentation

Not required

Required

Required

* - This list is illustrative. Specific requirements are in 40 CFR 261, 262, 264, and 265.

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