A method and apparatus for metering a predetermined quantity of liquid
decontaminant into a vaporization system. A single vacuum source is used
to fill an injector with the predetermined quantity of liquid
decontaminant and to also establish a vacuum in a chamber. The chamber is
injected with the liquid decontaminant filling the injector. The liquid
decontaminant is vaporized in the chamber to produce a vaporized
decontaminant.