Requirements for Laboratory Use of Chemicals cont'd

DOE-HDBK-1139/3-2005

Sources11

Consolidated Requirements12

In a liquid storage area specifically designed and

protected for dispensing Class I flammable

liquids that meet the requirements of NFPA 30.

4.3.5.5 Transfer of Class I liquids from containers of 19L

NFPA 45, 7.2.2.7

(5 gal.) or more capacity shall be carried out as

follows:

In a separate building; OR

In a liquid storage area specifically designed for

dispensing Class I flammable liquids that meet

the requirements of NFPA 30.

4.3.5.6 Class I liquids shall not be transferred between

NFPA 45, 7.2.2.8

conductive containers of greater than 4L (1.1 gal.)

capacity unless the containers are electrically

interconnected by direct bonding or indirect

bonding through a common grounding system.

When dispensing Class I liquids involves

nonconductive containers larger than 4L (1.1gal.),

which can be difficult to bond or ground, special

dispensing procedures commensurate with the

electrical characteristics of the liquid shall be

developed and implemented.

4.3.5.7 Individual containers of flammable or combustible

NFPA 45, 7.2.3.2

liquids shall not exceed the capacities listed in

NFPA 45, Table 7.2.3.2.

4.3.5.8 The quantity of flammable solids, solid or liquid

NFPA 45, 7.3-5

oxidizers, or peroxides allowed shall be limited to

the minimum quantity necessary to perform the

work being done. Handling of materials shall

conform to the manufacturers' recommendations.

4.3.6

Laboratory Compressed Gases In addition to the

NFPA 45, 8.1.4-6

requirements in Section 4.3, above, compressed gas

cylinders in laboratories must also meet the

requirements in sections 4.3.6.1-5 below.

4.3.6.1 Lecture bottle-sized cylinders of the following

NFPA 45, 8.1.4.1

gases located in laboratory units shall be kept in a

continuously mechanically ventilated hood or other

continuously mechanically ventilated enclosure:

(1) All gases that have an NFPA 45 Health Hazard

Ratings of 3 or 4;

(2) All gases that have a NFPA 45 Health Hazard

Rating of 2 without physiological warning

properties; and

(3) Pyrophoric gases