Spray walls, ceilings and surfaces to be decontaminated 

 and close the room for 24 hours. Then open and ventilate 

 until all formaldehyde fumes are gone (You can smell them) 

 BEFORE ENTERING or STORING PRODUCE. (More about Ventila- 

 tion under "FORMALDEHYDE GAS"). 



As Formaldehyde Gas : 



This is an easy method. Suitable for empty storage or packing 

 rooms (no living organisms). Boxes, containers, or equipment 

 stored in them may remain or be placed in them to be decontam- 

 i nated. 



Gas is generated by reacting 1 pint of formalin (the commer- 

 cial 37% formaldehyde solution) with 8 ounces of potassium 

 permanganate (crystals or powder) for each 1000 cubic feet of 

 storage. When they are combined, there is a violent boiling 

 action and clouds of gas, which soon penetrate all parts of 

 the room, are released. Considerable heat is generated and 

 there may be some spattering. 



Proceed as follows: 



1. Wet down walls, floors and items to be decontaminated 

 with enough water to moisten them. 



2. Room temperature 65 F or higher. 



3. Calculate cubic content of room. You will need 1 

 pint of formalin and 8 oz of potassium permanganate 

 for each 1000 cubic feet. 



4. You will need several large wide metal containers such 

 as 5 gallon pails, wide pans, or even an ash barrel 

 will do, in which to react the two materials. 



5. Put 3 pints of formalin (enough for 3000 cubic feet) 

 in a container and place the containers in different 

 parts of the storage so that starting with the one 

 farthest from the door you can work toward the door. 

 On a wooden floor, place them on bricks, because con- 

 siderable heat is generated. 



6. Beside each container of formaldehyde place the re- 

 quired amount of potassium permanganate (8 ozs for 

 each pint) in a coffee can. 



Now you are ready to generate gas and fumigate. 



Proceed as follows: 



Starting with the container farthest from the door, 

 carefully pour the potassium permanganate over the edge 



