for recoupment of NFPA class I flammable liquids. The ventilation system should ensure that
shop air is not shared with any administrative areas where personnel unprotected by PPE may be
K. Electrical components should consist of inconduit wiring and conform to NEC class I,
division 2 standards as specified in NFPA 70, Article 500. In areas where NFPA class I
flammable liquids will be recouped, all electrical components within 3 feet must conform to class
I, division 1 standards. Areas where flammable liquids are transferred from one to another are
included in division 1 whereas division II includes storage areas where the liquid is normally
confined in closed containers and can escape only in an accidental release.
1. An automatic fire suppression system is required for recoupment of flammable or oxidizing
materials. The system should use an appropriate extinguishing medium. Upon activation, the
fire suppression system should deactivate ventilation systems and activate alarm systems.
2. Equipment Requirements for Hazardous Materials Recoupment
a. Recoupment facilities must be equipped with a variety of equipment to safely transfer
hazardous materials to new packages. Transfer equipment is required to prevent release of a
material or its vapors and to facilitate transfer with a minimal loss of the product. Safety and
emergency equipment must be provided that will prevent or minimize personnel exposure/injury
and damage if a mishap occurs. This section describes the equipment requirements for a
hazardous materials recoupment facility.
b. A variety of factors influence the specific transfer equipment required for recoupment,
including a material's physical characteristics (e.g., vapor pressure, physical state), a material's
hazardous characteristics (e.g., flammability, corrosivity, toxicity), and the package. Transfer
equipment, in conjunction with controls (e.g., spill control/containment, ventilation, eye washes,
deluge showers, etc.), should prevent release of materials or dispersal of vapors or dust into the
work environment during recoupment operations. Transfer equipment requirements include the
(1) Transfer equipment, including pumps and funnels, must not react with or absorb the
material being recouped. Particular care should be taken when equipment is chosen for solvents,
corrosives, and reactives.
(2) When recouping flammable, reactive, or shocksensitive materials, transfer equipment
should be nonsparking and designed to minimize friction and static charge buildup. Equipment
must be bonded or grounded when flammable/combustible materials (including organic
peroxides) are transferred between containers that are conductive (e.g., metal cans) or
nonconductive and with capacity greater than 5 gallons (e.g., plastic-lined drums). Bonding or
grounding should be achieved by one of the following methods: (1) by keeping transfer
equipment (e.g., fill spout, nozzle, fill pipe, funnel, strainer) in continuous contact with the edge
of the fill opening; (2) by attaching a bond wire between metal parts of both containers; or (3) by
attaching a ground wire between metal parts of each container and the ground.
(3) Whenever practical, recoupment operations that release or generate airborne