A raw (untreated) or unapproved water supply must be used.
STEPS OF PERFORMANCE:
STEP 1: Before adding chlorine, check the chlorine residual following the
procedures in Task 7.
STEP 2: If the chlorine residual is less than the desired level, add enough chlorine
to raise the residual to the required level. Use Table A-1 to determine the
amount to add to untreated water. If a 10 mg/L chlorine residual is
required, double these amounts. To increase the residual in treated water,
smaller quantities of chlorine will be needed.
STEP 3: Wait 10 minutes, then check the chlorine residual.
STEP 4: If the residual is less than 5 mg/L, repeat steps 2 and 3 using a smaller
amount of chlorine.
STEP 5: If the residual is at least 5 mg/L, wait an additional 20 minutes before
drinking.
Table A-1. Amounts of HTH and Bleach Equivalent to a 5 mg/L Dose in Various
Volumes of Water Volume*
|
VOLUME
|
AMPULES
|
HTH
|
5% BLEACH
|
MRE
SPOON
|
MESSKIT
SPOON
|
MRE
SPOON
|
MESSKIT
SPOON
|
|
5 GAL
|
0.5
|
|
|
0.5
|
|
|
10 GAL
|
1.0
|
|
|
1.0
|
|
|
20 GAL
|
1.0
|
|
|
2.0
|
|
|
32 GAL
|
2.0
|
|
|
2.0
|
1.0
|
|
36 GAL
|
2.0
|
0.5
|
|
3.0
|
1.0
|
|
50 GAL
|
3.0
|
0.5
|
|
3.0
|
1.0
|
|
55 GAL
|
3.0
|
0.5
|
|
4.0
|
1.0
|
|
100 GAL
|
6.0
|
1.0
|
|
7.0
|
2.0
|
|
150 GAL
|
8.0
|
1.0
|
|
10.0
|
3.0
|
|
160 GAL
|
9.0
|
1.0
|
|
11.0
|
3.0
|
|
250 GAL
|
14.0
|
2.0
|
0.5
|
17.0
|
5.0
|
|
400 GAL
|
22.0
|
3.0
|
1.0
|
26.0
|
7.0
|
|
500 GAL
|
27.0
|
3.0
|
1.0
|
33..0
|
9.0
|
|
1000 GAL
|
54.0
|
7.0
|
2.0
|
66.0
|
18.0
|
|
3000 GAL
|
162.0
|
20.0
|
6.0
|
196.0
|
54.0
|
|
5000 GAL
|
270.0
|
33.0
|
10.0
|
327.0
|
90.0
|
|
* THE QUANTITIES DEPICTED IN THIS TABLE ARE GENERAL
GUIDELINES,
ACTUAL AMOUNTS MAY VARY BASED ON WATER QUALITY.
|
