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Other Materials

Compressed Gas Recovery

Any material or mixture that, when enclosed in a container, has an absolute pressure exceeding 40 PSI at 70 degrees Fahrenheit or, regardless of pressure at 70 degrees Fahrenheit, exceeds 140 PSI at 130 degrees Fahrenheit. Common compressed gases are propane, nitrogen, chlorine, helium, and oxygen.

Oil Absorbents

Materials that are designed to quickly soak up oils and other hydrocarbon liquids.


A synthetic resin which is a polymer of styrene, used chiefly as lightweight rigid foams and films.

Polyurethane Foam

A polymer produced from the reaction of polyols and isocyanates.