Chloropicrin tear gas is a restricted-use pesticide, and the applicator must be properly certified. Before applying chloropicrin, read label carefully and use proper safety equipment during the application. After cleaning and spraying the bin, seal the fan with polyethylene film and duct tape or elastic bands and similarly seal other openings in the lower half of the bin to make them gas tight. Because chloropicrin is much heavier than air, no sealing is needed around the top of the bin. Post fumigation warning signs on entrances to the bin.
Signs are available from the dealer.
Climb to the top of the bin and pour in 1 pound of chloropicrin per 1,000 cubic feet of underfloor area through the center roof opening, letting it splash onto the bin floor. Choose the right size container for the bin and pour in all of the contents at one time. It has a very strong odor, so pour at arm s length, and keep your head out in the fresh air. Run the fan until the odor is gone. Stored grain should contain minimal foreign material and a moisture content of 13 percent or less.