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Section E
Spills Or Leaks
If a large release of vapor occurs, such as from a large spill or leak, the vapors
may concentrate near the floor or low spots and displace the oxygen available for
breathing, causing suffocation.
Evacuate everyone until the area has been ventilated. Use blowers or fans to
circulate the air at floor level. DO NOT reenter the affected area unless you are
equipped with a self-contained breathing apparatus or unless an area monitor
indicates that the concentration of HFC-134a vapors in the area is below the AEL.
Always use self-contained breathing apparatus or an air-line mask when entering
tanks or other areas where vapors might exist. Use the buddy system and a lifeline.
Refer to the Material Safety Data Sheet (MSDS) for HFC-134a for more
information.
HFC-134a vapors have a slightly sweet odor that can be difficult to detect.
Therefore, frequent leak checks and the installation of permanent area monitors
may be necessary in enclosed spaces. Refer to ASHRAE Standards 15 and 34 for
refrigeration machinery rooms.
To ensure safety when working with HFC-134a in enclosed areas:
1. Route relief and purge vent piping (if present) outdoors, away from air intakes.
2. Make certain area is well ventilated, using auxiliary ventilation, if necessary, to
move vapors.
3. Make sure area is clear of vapors prior to beginning work.
4. Install air monitoring equipment to detect leaks.
Skin And Eye Contact
At room temperature, HFC-134a vapors have little or no effect on the skin or eyes.
However, in liquid form, HFC-134a can freeze skin or eyes on contact, causing
frostbite. Following contact, soak the exposed area in lukewarm water, not cold or
hot. If medical treatment cannot begin immediately, apply a light coat of a
nonmedicated ointment, such as petroleum jelly. If the exposed area is in a location
where the presence of the ointment would be awkward, such as on the eye, apply
a light bandage. In all cases of frostbite, seek medical attention as soon as
possible.
Always wear protective clothing when there is a risk of exposure to liquid HFC-
134a. Where splashing is possible, always wear eye protection and a face shield.
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