boost pump when it begins to operate at idle speed. Isolate the pump assembly from the hose line by opening
the butterfly valve on the bypass system and closing the butterfly valves on the suction and discharge hoses.
Repeat the procedure with each down line pump.
e. Once all pumping stations have been shut down and isolated from the hose line, use the 125-GPM
pump to drain the storage tanks. Empty the solution from the hypochlorination units in accordance with
governing environmental regulations. This solution may be considered hazardous waste where you are
operating. Temporarily let the units run to flush parts with untreated water.
f. Pumping stations can be disassembled as they are shut down. Distribution points can be partially
disassembled while storage tanks are being drained, and completely disassembled when tanks are empty.
Storage assemblies can be disassembled when tanks are collapsed.
g. Disconnect evacuate, and repack the hose line. Use the displacement and evacuation kit to remove
the water and collapse the hoseline.
(1) Evacuate the hose line by passing the displacement ball through the hose by air pressure. The
ball receiver is placed on one end of a 500-foot segment and the pneumatic coupler is placed on the other end.
The 250-CFM air compressor supplies pressurized air (80 to 90 psi), forcing the ball through the hose and
displacing any residual water. Ensure the soldiers use the recommended pressure of 80 to 90 PSI. Once the ball
arrives at the receiver the air compressor is shut off. Pressurized air is release by opening the coupler and the
ball is removed from the receiver.
(2) Compress the hose line by replacing the ball receiver with an end cap on the 500-foot hose
segment that has just been evacuated. The ejector assembly is installed on the pneumatic coupler and connected
to the air compressor. After 10 minutes of operation. the hose line will be collapsed. The pneumatic coupler
and ejector are removed and another end cap is placed on the hose segment. This hose segment is now ready
(3) Repack the hose line lengths as they are evacuated and collapsed. Crews recapping the hose line
segments can follow behind those evacuating and collapsing hose line.
h. Suspension devices, road crossing guards. and the pressure-reducing valve that were placed along
the hose line route are removed when the crews reach the installation sites.
i. The pumping stations, storage assemblies, and distribution points can be recapped in any sequence.
Pack the 10-mile hose line segment crate, containing kits required to repack the hoseline, last. Proceed to
packing the hose line.
PART E - STORAGE OPERATIONS
1. In DS operations, water storage will be maintained at water production sites in 3,000-gallon collapsible
fabric bags called "ONION" tanks. This stored water, and the available raw water source, are combined to
provide the estimated command water reserve stock. Storage facilities must be large enough to meet the daily
peak demands. This helps to eliminate long waits at the water point by consumers as well as allow water
production units to remain operating for extended periods of time. Having sufficient storage capability avoids
frequent start-ups and shutdowns of the water purifiers, which are time consuming and inefficient. However,
your storage capacity is limited to the type of TOE.