TM 10-4320-303-13
2.8 PREPARATION FOR MOVEMENT.
2.8.1 Procedures for Preparation for Movement of TWDS. This paragraph provides general information for
movement of TWDS equipment. Detailed instructions for the movement of each major component will be
provided in paragraphs 2.8.2 through 2.8.6.
a. Preparing TWDS for movement requires the following:
(1) Removing water from system.
(2) Shutting down and disassembling major components.
(3) Repacking major components.
b. Remove water at lead pumping station first, then move down the line to the last boost pumping
station. After hoseline water has been removed, empty storage tanks and begin to disassemble
major components.
c. To begin emptying hoseline, reference applicable technical manual and shut down lead pump. Close
butterfly valves on suction and discharge ports of lead pump. Run boost pumping stations in manual
mode until suction pressure drops to 10 psi. Shut down boost pumping stations.
CAUTION
Do not operate 600 gpm pumping assemblies below 10 psi. Damage to 600 gpm
pumping assemblies may result if they are operated below 10 psi.
d. Close butterfly valves on suction and discharge ports of boost pumping stations.
e. Once all pumping stations have been shut down and isolated from hoseline, use 125 GPM pumping
assembly to drain storage tanks. Empty solution from reservoirs on hypochlorination units.
Temporarily leave units in operation to flush parts with untreated water. After flushing for 10
minutes, disconnect hypochlorination units and continue to empty storage tanks. Detailed
procedures for removing water from storage tanks are provided in paragraph 2.8.6.
f. Pumping stations can be disassembled when 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. Begin hoseline shutdown at the first 500 foot length and move down the line. Move air compressor
down two hose lengths. Evacuate trailing hose, then load hose length to minimize number of times
air compressor is to be moved. Repack hoseline lengths when they are evacuated and collapsed.
Personnel repacking hoseline segments can follow behind those evacuating and collapsing hoseline.
Suspension devices, road crossing guards, and the pressure-reducing valve assembly that were
placed along hoseline route are removed when crews reach installation sites.
h. The pumping stations, storage assemblies, and distribution points can be repacked in any sequence.
Pack the 10-mile hoseline segment crate, containing kits required to repack the hoseline, last.
i. Pack all components for the six pumping stations in one crate, except for trailer-mounted pump
assemblies. Refer to applicable technical manual for preparation of movement for 600 GPM
pumping assemblies. Collect pumping station components and packing materials at a single site
before repacking crate. Otherwise, all packing materials must be shuttled to each installation site for
packing.
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