TM 9-2330-388-14
Section XIII. DRAINING AND PURGING OF TANK INTERIOR - WATER TANKERS ONLY
(4) Drain the rinse water through the discharge
4-36.
Water Tanker Cleaning
apparatus and discard the rinse water.
NOTE
(5) After cleaning, sanitize the container with a
100 ppm chlorine solution as discussed below.
A THOROUGH READING OF TB MED 577 and
FM 21-10 is essential for understanding
4-37.
Equipment Sanitizing
proper draining, purging and cleaning
methods.
a.
General
a.
Preparation
All equipment used to store and distribute potable water
will be sanitized with a 100 ppm chlorine solution after
WARNING
the equipment has been cleaned.
DO NOT ENTER the tank unless you are
trained In confined space entry and all entry
b.
Preparation
requirements have been met and a permit
issued.
All maintenance and cleaning
(1) Construct a seepage pit or sump into which
operations which require worker entry into
the waste chlorine solution and rinse waters will be
the tank should be performed at a facility that
discharged. Waste chlorine solution should not be
has a confined space entry program (i.e.,
discharged into bodies of water or into sanitary sewers.
General Support or Depot level). Workers
The chlorine can kill aquatic organisms in the water and
must contact the supporting safety office
bacteria in sewage which are necessary for waste
and comply with confined space entry
degradation.
requirements.
(2) Prepare a sanitizing solution of 100 ppm
(1) Remove rust from interior surfaces using
chlorine.
scour powder and a nonmetallic scouring pad or brush.
(a) Using calcium hypochlorite, add one am-
(2) Steam clean for at least 30 minutes (if
pule to one gallon (3.8 liter) of potable water or add five
possible).
level mess kit spoonfuls to 100 gallons (380 liters) of
potable water.
(3) Thoroughly rinse the
interior
of
the
container a discard the contents.
(b) Using liquid bleach, add one mess kit
spoonful to two gallon (7.6 liters) of potable water or add
(4) Prepare a soap solution by adding one-third
one gallon of bleach to 500 gallons (1,900 liters) of
c teen cup of dishwashing compound to 10 gallons (38
potable water.
liters) of hot water or 3-1/3 canteen cups of dishwashing
compound to 100 gallons (380 liters) of hot water.
c.
Procedures
b.
Cleaning procedures
(1) When sufficient quantities of water are
available, fill the container with the sanitizing solution.
(1) Thoroughly wash the interior surfaces of
Close the manhole covers or ports. Allow the solution to
equipment with the soap solution scrubbing the interior
remain in the container for 60 minutes. Briefly operate
surfaces with a long-handled brush.
the water dispensing unit to ensure that the sanitizing
solution has circulated through the pump, pipes, hoses
(2) Clean the pump, pipes, valves and spigots
and spigots.
by drawing soap through them.
(2) If sufficient quantities of water are not
(3) Rinse the container and apparatus twice
available, apply the sanitizing solution by spraying or
with warm (120F, 49C) water to completely remove the
brushing (use a clean, nonmetallic brush) it on the
soap solution.
interior surface to include ports and manholes. Add
additional solution to the tank to clean the discharge and
pumping apparatus. The solution must remain in con-
tact with the surfaces for 60 minutes and may require
4-103
