Chlorine dioxide could be safely used to fumigate a US Senate office building, says the US Environmental Protection Agency

"Workers in Washington have finished fumigating offices in the Hart Senate Office Building that had been contaminated with anthrax... Officials involved in the decontamination effort at the Hart building say it is unlike any other cleanup they have ever done before." "So we ended up with essentially a short list of technologies that we believed would be effective," he said. "We went through a lot of those and quickly arrived at chlorine dioxide as being the one that had the best chance at being effective."

Gas treatment: "Place one gallon of water in a pail, hang the battery-powered aerator on the edge and extend the hose with an air stone to the bottom. Place the pail in the center of the truck on the floor, turn on the aerator and place a 100 gram ClO2 tablet into the pail and exit the truck cab, closing vents, doors and windows for five hours or until vapors cease and water is clear. Leaving overnight is ideal. When the ClO2 solution has turned clear, it can be disposed of." Spray/fog treatment: "Between 250 ppm and 500 ppm, and fill a wet fogger or sprayer with the ClO2 solution. Wet fog or lightly spray all surfaces, ceiling to floor, allowing five minutes of wet contact time... Chlorine dioxide can be used in vapor- or a liquid-form, but as a liquid it is more fragile and its effectiveness is vulnerable to sunlight. Once diluted from tablet- to liquid-form, it has a shelf life of up to six months if stored correctly in an air-tight opaque container out of direct sunlight."