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CHEMTREC
(800) 424-9300
The Chemical Transportation Emergency Center
(CHEMTREC) in Washington also has a 24-hour
Hazard Class Definitions
Table B
Class Class Name Example
Ammunition,
toll-free line. CHEMTREC was created to provide
emergency personnel with technical information
about the physical properties of hazardous
materials. The National Response Center and
CHEMTREC are in close communication. If you call
either one, they will tell the other about the problem
when appropriate.
Do not leave radioactive yellow - II or yellow - III
labeled packages near people, animals, or film
longer than shown in Figure 9.10
Radioactive Separation
Table A
MINIMUM DISTANCE IN FEET TO
NEAREST UNDEVELOPED FILM
1 Explosives
2 Gases
3 Flammable
4 Flammable
Solids
5 Oxidizers
6 Poisons
7 Radioactive
8 Corrosives
Miscellaneous
Dynamite,
Fireworks
Propane,
Oxygen, Helium
Gasoline,
Acetone
Matches, Fuses
Ammonium
Nitrate, Hydrogen
Peroxide
Pesticides,
Arsenic
Uranium,
Plutonium
Hydrochloric
Acid, Battery
Fluid
Formaldehyde,
None
0.1 to
1.0
1.1 to
5.0
5.1 to
10.0
10.1 to
20.0
0-2
Hrs.
0
1
3
4
5
2-4
Hrs.
0
2
4
6
8
4-8
Hrs.
0
3
6
9
12
8-12
Hrs.
0
4
8
11
16
Over 12
Hrs.
0 0
5 1
11 2
15 3
22 4
9
None
None
Hazardous
Materials
ORM-D (Other
Regulated
Material-
Domestic)
Combustible
Liquids
Figure 9.11
Asbestos
Hair Spray or
Charcoal
Fuel Oils, Lighter
Fluid
20.1 to
30.0 7
30.1 to
40.0 8
40.1 to
50.0 9
10 15
11 17
12 19
20 29 5
22 33 6
24 36
Subsections 9.6 and 9.7
Test Your Knowledge
1. If your placarded trailer has dual tires, how
often should you check the tires?
Figure 9.10
Classes of Hazardous Materials
Hazardous materials are categorized into nine
major hazard classes and additional categories for
consumer commodities and combustible liquids.
The classes of hazardous materials are listed in
Figure 9.11.
2. What is a safe haven?
3. How close to the traveled part of the roadway
can you park with Division 1.2 or 1.3
materials?
4. How close can you park to a bridge, tunnel, or
building with the same load?
5. What type of fire extinguisher must placarded
vehicles carry?
6. You’re hauling 100 pounds of Division 4.3
(dangerous when wet) materials. Do you
need to stop before a railroad-highway
crossing?
7. At a rest area you discover your hazardous
materials shipments slowly leaking from the
vehicle. There is no phone around. What
should you do?
Section 9 - Hazardous Material Page 9-18
Version: July 2017
Commercial Driver’s License Manual – 2005 CDL Testing System
8. What is the Emergency Response Guide
(ERG)?
These questions may be on your test. If you can’t
answer them all, re-read subsections 9.6 and 9.7.
9.8 – Hazardous Materials Glossary
This glossary presents definitions of certain terms
used in this section. A complete glossary of terms
can be found in the federal Hazardous Materials
Rules (49 CFR 171.8). You should have an up-to-
date copy of these rules for your reference.
(Note: You will not be tested on this glossary.)
Sec. 171.8 Definitions and abbreviations.
Bulk packaging – Packaging, other than a vessel,
or a barge, including a transport vehicle or freight
container, in which hazardous materials are loaded
with no intermediate form of containment and which
has:
A maximum capacity greater than 450 L (119
gallons) as a receptacle for a liquid;
A maximum net mass greater than 400 kg (882
pounds) or a maximum capacity greater than 450 L
(119 gallons) as a receptacle for a solid; or
A water capacity greater than 454 kg (1000 pounds)
as a receptacle for a gas as defined in Sec. 173.115.
Cargo tank - A bulk packaging which:
Is a tank intended primarily for the carriage of liquids
or gases and includes appurtenances,
reinforcements, fittings, and closures (for "tank",
see 49 CFR 178.345-1(c), 178.337-1, or 178.338-1,
as applicable);
Is permanently attached to or forms a part of a motor
vehicle, or is not permanently attached to a motor
vehicle but which, by reason of its size, construction,
or attachment to a motor vehicle is loaded or
unloaded without being removed from the motor
vehicle; and
Is not fabricated under a specification for cylinders,
portable tanks, tank cars, or multi-unit tank car
tanks.
Carrier – A person who transports passengers or
property in commerce by rail car, aircraft, motor
vehicle or vessel.
Consignee – The business or person to whom a
shipment is delivered.
Division – A subdivision of a hazard class.
EPA – U.S. Environmental Protection Agency.
FMCSR – The Federal Motor Carrier Safety
Regulations.
Freight container – a reusable container having a
volume of 64 cubic feet or more, designed and
constructed to permit being lifted with its contents
intact and intended primarily for containment of
packages (in unit form) during transportation.
Fuel tank – A tank, other than a cargo tank, used to
transport flammable or combustible liquid or
compressed gas for the purpose of supplying fuel
for propulsion of the transport vehicle to which it is
attached, or for the operation of other equipment on
the transport vehicle.
Gross weight or gross mass – The weight of the
packaging plus the weight of its contents.
Hazard class – The category of hazard assigned to
a hazardous material under the definitional criteria
of Part 173 and the provisions of the Sec. 172.101
Table. A material may meet the defining criteria for
more than one hazard class but is assigned to only
one hazard class.
Hazardous materials – A substance or material
which has been determined by the Secretary of
Transportation to be capable of posing an
unreasonable risk to health, safety, and property
when transported in commerce, and which has
been so designated. The term includes hazardous
substances, hazardous wastes, marine pollutants,
elevated temperature materials and materials
designated as hazardous in the hazardous
materials table of §172.101, and materials that meet
the defining criteria for hazard classes and divisions
in §173, subchapter c of this chapter.
Hazardous substance - A material, including its
mixtures and solutions, that:
Is listed in Appendix A to Sec. 172.101;
Is in a quantity, in one package, which equals or
exceeds the reportable quantity (RQ) listed in
Appendix A to Sec. 172.101; and
When in a mixture or solution -
For radionuclides, conforms to paragraph 7 of
Appendix A to Sec. 172.101.
For other than radionuclides, is in a concentration
by weight which equals or exceeds the
concentration corresponding to the RQ of the
material, as shown in Figure 9.12.
Section 9 - Hazardous Material Page 9-19
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Commercial Driver’s License Manual – 2005 CDL Testing System
Hazardous Substance Concentrations the maximum net mass limitations, provided in
RQ Pounds
(Kilograms
5,000
(2,270)
1,000 (454)
100 (45.4)
10 (4.54)
1 (0.454)
Concentration by Weight
Percent PPM
10 100,000
2 20,000
.2 2,000
.02 200
.002 20
Figure 9.12
subpart L of Part 178.
N.O.S. - Not otherwise specified.
Outage or ullage – The amount by which a
packaging falls short of being liquid full, usually
expressed in percent by volume.
Portable tank – Bulk packaging (except a cylinder
having a water capacity of 1,000 pounds or less)
designed primarily to be loaded onto, or on, or
temporarily attached to a transport vehicle or ship
This definition does not apply to petroleum products
that are lubricants or fuels (see 40 CFR 300.6).
Hazardous waste – Any material that is subject to
the Hazardous Waste Manifest Requirements of the
U.S. Environmental Protection Agency specified in
40 CFR Part 262.
Intermediate bulk container (IBC) – A rigid or
flexible portable packaging, other than a cylinder or
portable tank, which is designed for mechanical
handling. Standards for IBCs manufactured in the
United States are set forth in subparts N and O Part
178.
Limited quantity – The maximum amount of a
hazardous material for which there may be specific
labeling or packaging exception.
Marking – The descriptive name, identification
number, instructions, cautions, weight,
specification, or UN marks or combinations thereof,
required by this subchapter on outer packaging of
hazardous materials.
Mixture – A material composed of more than one
chemical compound or element.
Name of contents – The proper shipping name as
specified in Sec. 172.101.
Non-bulk packaging - A packaging, which has:
A maximum capacity of 450 L (119 gallons) as a
receptacle for a liquid;
A maximum net mass less than 400 kg (882
pounds) and a maximum capacity of 450 L (119
gallons) or less as a receptacle for a solid;
A water capacity greater than 454 kg (1,000
pounds) or less as a receptacle for a gas as defined
in Sec. 173.115;
Regardless of the definition of bulk packaging, a
mazimum net mass of 400 kg (882 pounds) or less
for a bag or box conforming to the applicable
requirements for specification packagings, including
and equipped with skids, mountings, or accessories
to facilitate handling of the tank by mechanical
means. It does not include a cargo tank, tank car,
multi-unit tank car tank, or trailer carrying 3AX,
3AAX, or 3T cylinders.
Proper shipping name – The name of the
hazardous materials shown in Roman print (not
italics) in Sec. 172.101.
P.s.i. or psi – Pounds per square inch.
P.s.i.a. or psia – Pounds per square inch absolute.
Reportable quantity (RQ) - The quantity specified
in Column 2 of the Appendix to Sec. 172.101 for any
material identified in Column 1 of the Appendix.
PHMSA – The Pipeline and Hazardous Materials
Safety Administration, U.S. Department of
Transportation, Washington, DC 20590.
Shipper's certification – A statement on a shipping
paper, signed by the shipper, saying he/she
prepared the shipment properly according to law.
For example:
"This is to certify that the above named materials
are properly classified, described, packaged,
marked and labeled, and are in proper condition for
transportation according to the applicable
regulations or the Department of Transportation.";
or
I hereby declare that the contents of this
consignment are fully and accurately described
above by the proper shipping name and are
classified, packaged, marked and
labeled/placarded, and are in all respects in proper
condition for transport according to applicable
international and national government regulations."
Shipping paper – A shipping order, bill of lading,
manifest, or other shipping document serving a
similar purpose prepared in accordance with
subpart C of Part 172.
Section 9 - Hazardous Material Page 9-20
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Commercial Driver’s License Manual – 2005 CDL Testing System
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