(f). A yellow color in the upper layer equal to or darker than the yellow band on the bottle is a positive test
for G agents and for certain toxic insecticides. A yellow color in the lower water layer indicates very dangerous
concentrations of G agents. With time, the yellow band on the bottle may fade, in this case, a comparison may
be made with the yellow band on the Reagent X plastic tube used for the chlorine demand test.
(g) Rinse the bottle P (fig. 2-25) and fill to the 25 ml mark on the bottle. Add 2 tablets from the orange
capped vial I and shake to dissolve. Add 1 level scoop of powder from the gray capped vial J followed immediately
by 1 tablet from the dark green capped vial H. Place the plastic capon the bottle and shake well for 2 minutes.
Continue as specified in steps (e) and (f).
(h) In the absence of a highly positive chlorine demand test, no color or a color lighter than the yellow band
indicates a negative agent.
(6) Taste and Odor Test.
(a) If the arsenic test, para 2-24b(1) mustard test (2) above, chlorine demand test 2-22K(2) and G-agents
test 2-24b(1) are negative and if the pH test (4) above is 6 or above, carefully smell and taste a sample of the water
(b) A positive test is indicated by:
A lacrimatory or chlorine odor.
A biting and/or peppery chlorine taste.
Any taste or odor of a known war gas.
(c) Absence of all tastes and odors will indicate a negative result, but not necessarily a safe water. A negative
test is also indicated by the presence of only those odors and/or tastes normally characteristic of natural waters.
WATER TESTING KIT CHEMICAL AGENTS-M272 (Not Used in Buys 1 and 2).
Refer to TM 3-6665-315-10 (Non-Supportable)
OPERATION OF AUXILIARY EQUIPMENT
Water Testing Kit-Bacteriological
WATER TESTING KIT-BACTERIOLOGICAL. (Fig. 2-26.)
The Water Testing Kit-Bacteriological is used in conjunction with the WOAS-Preventive Medicine.