C. Basic Requirements. A modified general-purpose warehouse storage area should be used
for the storage of reactive materials. Particular emphasis should be placed on the type of floor
construction and its maintenance. There should be no basement or depressions below the storage
area into which water could flow or fall. Specific requirements for reactives storage areas
include:
1. For R1, spontaneously combustible materials (UN Class 4.2), specific storage requirements
should be evaluated on a case-by-case basis. Sources of storage information include the
manufacturer of the material, technical information data sheets or pamphlets, material safety data
sheets, military specifications (MILSPECS), and other DoD sources.
2. R2, dangerous when wet materials, shall be stored in the original shipping container or in a
compatible container of equal or greater strength. Storage areas shall be conspicuously posted
with signs or notices indicating "DANGEROUS IF NOT KEPT DRY - KEEP WATER AND
FLAMES AWAY" or equivalent wording.
D. Applicable HCCs. The HCCs of materials to be stored in this storage area include:
1. R1, Reactive Chemicals, Flammable, includes:
a. Spontaneously combustible materials, UN class 4.2.
b. Pyrophoric liquids that ignite in dry or moist air at or below a temperature of 130oF as
defined in 29 CFR 1910.1200.
2. R2, Water Reactive Chemicals, includes dangerous when wet, UN class 4.3.
3. Z6, Article, Battery, Lithium.
E. Storage Arrangement. Reactive materials should be palletized in a manner that prevents
direct contact between the material and the floor or ground. Pallet racks or single height stacks
should be used to prevent excessive stress on the containers. MHE and load width will dictate
the amount of aisle space required. All aisles should be kept clear of obstructions.
1. Particular emphasis should be placed on the physical condition of the package or container
in which the item is stored. Packages should show no evidence of damage or deterioration, and
all warning statements or labels shall be completely legible. Care shall be exercised to ensure
that warning statements and labels are not covered or obliterated when applying tape. Items
should be arranged in a manner that will facilitate both periodic inspection and adherence to the
FIFO principle of issue control. These materials should not be stored in Supply Condition Code
A beyond the manufacturer's shelf-life expiration date.
2. Water reactive materials and materials that are both water reactive and pyrophoric should
not be stored in a facility equipped with active overhead water sprinkler systems. The specific
area of a facility used for the storage of water reactive materials should be isolated by a
waterproof or water-resistant barrier (e.g., plastic sheeting or tarpaulin) to protect the materials
from water in the event the sprinkler system is activated elsewhere in the facility. Prior to storing
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