Spilled chemicals that pose a hazard to the land and water ecosystems can also provide a significant vapor hazard. Although the vapors released by such chemicals may ultimately be dispersed in the environment with little long-term effects, they do pose a hazard to life and property downwind pf the spill. Among the vapor amelioration techniques that have been considered is the use of a coolant to lower the temperature of a spill and reduce its equilibrium vapor pressure. This program has been conducted as a feasibility study of that mechanism. This program has established feasibility of the mechanism, but additional work is necessary to establish practicality, define materials to which cooling is applicable, and optimize the dispensing equipment.