Vaporization suppression foams

Spills/Leaks Absorb spill with inert material (e.g., vermiculite, sand, or earth), then place in suitable container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, observing precautions in the Protective Equipment section. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor-suppressing foam may be used to reduce vapors. 

A vapor suppressing foam may be used to reduce vapors. 

SPILL CLEAN-UP use water spray to cool and disperse vapors apply vapor suppression foam to limit vaporization from liquid release if in liquid form, absorb as much as possible with materials such as dry earth or sand remove all ignition sources. 

SPILL CLEAN-UP ventilate area of leak or spill vapor suppressing foam may be used to reduce vapors absorb or cover liquids with non-combustible materials (e.g., dry earth, sand, vermiculite), and transfer to chemical waste containers use clean non-sparking tools to collect absorbed materials flush remaining spill with large amounts of water but not into confined spaces such as sewers due to possibility of explosion remove all sources of ignition (e.g., flares, sparks or flames). 

SPILL CLEAN-UP ventilate area of spill or leak stop flow of gas if possible if leak cannot be stopped, allow to empty in open air in a safe place use vapor-suppressing foam to blanket release remove all sources of ignition. 

A total of six tests was performed. Each involved transferring liquid chlorine from one or more 1-ton chlorine containers to the open pan. After the pool of liquid chlorine had stabilized, measurements were made of downwind concentration with no mitigation procedure applied. Then one of several different mitigation procedures was performed on the liquid pool. In the first and last tests, the only mitigation technique used was water spray nozzles to knock down the chlorine vapor cloud. In tests 2, 3, and 5, different vapor suppression foams were applied to the liquid pool surface in combination with water spray from the nozzle system and measurements were made of the downwind concentration to determine the effectiveness of the procedure. Test 4 used no foam but did use the water spray nozzles and portable water nozzles. 

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