Decontamination Solutions

Preparation of Decontamination Solutions (0.5% & 5.0% Hypochlorite/Bleach)

WARNING! Do not confuse these solutions - 0.5% and 5.0%!

Preparation of the 0.5% and 5% hypochlorite solutions will require mixing the solutions in a container that can be closed after completion. By closing the container, the solution will remain at the required strength far longer than if allowed to stand in an open container.

The recommended mixing container is a 5-gallon water can. The hypochlorite granules must be completely dissolved in the water. The most effective method for mixing is to agitate the granules as they are poured into the water, and then allow the solution to sit for 20 minutes to ensure the granules dissolve.

0.5% Hypochlorite/Bleach Solution

Use 6-ounce bottles of calcium hypochlorite granules and mix one 6-ounce bottle into 5 gallons of water.

When using a bulk package of calcium hypochlorite, retain one empty 6- ounce bottle to measure the correct amount of dry calcium hypochlorite granules and mix as described above.

If you use household bleach (i.e., Clorox or Purex) - The bleach should be packaged in 1-quart bottles or 1-gallon jugs when received from supply. Only 4.5 gallons of water will be used. Mix 2 quarts of bleach into 4.5 gallons of water (ratio 1:9), and store the solution in a closed container until ready to use.

5.0% Hypochlorite Solution

Use 6-ounce bottles of calcium hypochlorite granules and mix 8 of the 6- ounce bottles of calcium hypochlorite into 5 gallons of water. If using calcium hypochlorite from a bulk package, retain one empty 6- ounce bottle to measure the correct amount of dry calcium hypochlorite granules.
5% solution only - If you use household bleach (i.e., Clorox or Purex), use the bleach straight from the bottle - do not mix in water.

WARNING! Do not ingest or expose eyes to hypochlorite solution! Store solution in sealed containers away from sunlight, as solution will degrade if left open or exposed to sunlight.