This article shall apply to materials not otherwise covered in this chapter which are highly flammable or which may react to cause fires or explosions or which, by their presence, create or augment a fire or explosion hazard or which, because of their toxicity, flammability or liability to explosion, render fire fighting abnormally dangerous or difficult, and also to flammable liquids which are chemically unstable and which may spontaneously form explosive compounds or undergo spontaneous reactions of explosive violence or with sufficient evolution of heat to be a fire hazard. Hazardous chemicals shall include such materials as flammable solids, corrosive liquids, radioactive materials, oxidizing materials, potentially explosive chemicals, highly toxic materials and poisonous gases, as defined in §
19-90. In addition, this article shall include all materials listed in both Parts 112 and 261 of Title 40 of the Code of Federal Regulations.
As used in this article, the following terms shall have the
meanings indicated:
CORROSIVE
A chemical that causes visible destruction of, or irreversible
alterations in, living tissue by chemical action at the point of contact.
A chemical shall be considered corrosive if, when tested on the intact
skin of albino rabbits by the methods described in DOTn 49 CFR 173.137,
such chemical destroys or changes irrepressibly the structure of the
tissue at the point of contact following an exposure period of four
hours. This term does not refer to action on inanimate objects.
[Amended 5-14-2019 by L.L. No. 2-2019]
FLAMMABLE SOLID
Includes a solid substance, other than one classified as
an explosive, which is liable to cause fires through friction, through
absorption of moisture, through spontaneous chemical change or as
a result of retained heat from manufacturing or processing, or which
has and ignition temperature below 212° F. (100° C.) or which
burns so vigorously and persistently when ignited as to create a serious
hazard. A chemical shall be considered a flammable solid in accordance
with the test method of CPSC 16 CFR Part 1500.44, if it ignites and
burns with a self-sustained flame at a rate greater than 0.0866 inch
(2.2 mm) per second along its major axis.
[Amended 5-14-2019 by L.L. No. 2-2019]
HIGHLY TOXIC MATERIAL
A material which produces a lethal dose or lethal concentration
which falls within any of the following categories:
[Amended 5-14-2019 by L.L. No. 2-2019]
A.
A chemical that has a median lethal dose (LD50) of 50 milligrams or less per kilogram of body weight when administered
orally to albino rats weighting between 200 and 300 grams each.
B.
A chemical that has a median lethal dose (LD50) of 200 milligrams or less per kilogram of body weight when administered
by continuous contact for 24 hours (or less if death occurs within
24 hours) with the bare skin of albino rabbits weighing between 2
and 3 kilograms each.
C.
A chemical that has a median lethal concentration (LC50) in air of 200 parts per million by volume or less
of gas or vapor, or 2 milligrams per liter or less of mist, fume or
dust, when administered by continuous inhalation for one hour (or
less if death occurs within one hour) to albino rats weighing between
200 and 300 grams each.
OXIDIZER
A material that readily yields oxygen of other oxidizing
gas, or that readily reacts to promote or initiate combustion of combustible
materials and, if heated or contaminated, can result in vigorous self-sustained
decomposition.
[Amended 5-14-2019 by L.L. No. 2-2019]
POTENTIALLY EXPLOSIVE CHEMICAL
Includes any chemical substance, other than one classified
as an explosive or blasting agent, which has a tendency to be unstable
and which can be exploded by heat or shock or a combination thereof.
RADIOACTIVE MATERIAL
Includes any material or combination of materials that spontaneously
emits ionizing radiation.
SEALED SOURCE
A quantity of radiation so enclosed as to prevent the escape
of any radioactive material but at the same time permitting radiation
to come out for use.
TOXIC
A chemical falling within any of the following categories:
[Added 5-14-2019 by L.L.
No. 2-2019]
A.
A chemical that has a median lethal dose (LD50) of more than 50 milligrams per kilogram, but not more than 500
milligrams per kilogram of body weight when administered orally to
albino rats weighing between 200 and 300 grams each.
B.
A chemical that has a median lethal dose (LD50) of more than 200 milligrams per kilogram but not more than 1,000
milligrams per kilogram of body weight when administered by continuous
contact for 24 hours (or less if death occurs within 24 hours) with
the bare skin of albino rabbits weighing between 2 and 3 kilograms
each.
C.
A chemical that has a median lethal concentration (LD50) in air of more than 200 parts per million, but not
more than 2,000 parts per million by volume or less of gas or vapor,
or more than 2 milligrams per liter but not more than 20 milligrams
per liter of mist, fume or dust, when administered by continuous inhalation
for one hour (or less if death occurs within one hour) to albino rats
weighing between 200 and 300 grams each.
Packaged oxidizing materials shall be stored in dry locations
and separated from stored organic materials. Bulk, oxidizing materials
shall not be stored on or against wooden surfaces.
Satisfactory provisions shall be made for containing and neutralizing
or safely flushing away leakage of corrosive liquids which may occur
during storage or handling.