Figure 2-6. Lyster bad, 36-gallon, sterilizing water.
(4) Empty the prepared solution slowly into the Lyster bag and stir the
water with a clean stick.
(5) Cover the bag and flush the faucets by running a small quantity of the
water through each of them.
(6) After the disinfecting solution has been mixed with the water for
10 minutes, flush the faucets again. Then collect a sample of water from one of the
faucets in the 5 ppm plastic tube for testing (para 2-9b(2)).
Collecting the water sample in the same cup or container used to dissolve
the calcium hypochlorite will invalidate the results and the whole
measurement or test will need to be done again.
(7) If the test shows a chlorine residual less than 5 ppm, add the contents of
an additional calcium hypochlorite ampule and, after 10 minutes, repeat the test.
(8) If the test shows the chlorine residual to be at least 5 ppm, wait an
additional 20 minutes since a total disinfection time of 30 minutes is required. Check
the residual again. If the chlorine residual is 5 ppm or more, the water is ready for
b. Chlorination in Other Bulk Containers. The same general procedures
described in subparagraph a above can be used to treat water in containers other than
the bag, but a different amount of calcium hypochlorite must be used. For a 5-gallon