ARMY TM 10-4610-309-14
MARINE CORPS TM10802A-14/1
0008 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
PREPARATION FOR USE AND INSTALLATION INSTRUCTIONS
OCEAN INTAKE STRUCTURE SYSTEM (OISS) SET-UP OPERATION
UNDER UNUSUAL CONDITIONS
JETTING THE FOURTH WELLPOINT
1. Connect a 2 in. x 10 ft., yellow-banded OISS suction hose to the fourth wellpoint.
2. Using the 10 ft. hose on the third wellpoint and the 10 ft. hose on the fourth wellpoint, determine
where to jet the fourth wellpoint.
3. Jet the fourth wellpoint into the sand using the same procedures that were followed to jet the
other three wellpoints. Observe the warning.
4. After flushing the fourth wellpoint for five minutes, shut down the diesel pump.
5. Remove the discharge hose from the 10 ft. suction hose.
6. Connect the two 10 ft. suction hoses between the third and fourth wellpoints.
7. If the OISS is going to be submerged at high tide, secure all camloks with plastic wire ties.
CHECKING FOR HYDROGEN SULFIDE
When first filling the MF Feed tank, smell the water. If a smell of rotten eggs is observed, hydrogen
sulfide is present. Extended operation with hydrogen sulfide present will result in pump seal failures,
pump impellor corrosion and eventual corrosion of the TWPS piping. Iron is often present with hydrogen
sulfide. Iron will rapidly foul both the MF membranes and the RO membranes and should be avoided if
possible. The hydrogen sulfide will also pass over to the product water and result in poor tasting water.
If hydrogen sulfide is present, respond as follows:
1. If the smell is weak, continue with operation, but check to make sure it does not become stronger.
If the mission is planned to exceed 100 hours, reset the OISS at low tide using the 2 ft. risers.
This will draw seawater directly and avoid the hydrogen sulfide.
2. If the smell is strong, do not operate the TWPS. Reset the OISS at low tide using the 2 ft. risers
to avoid the hydrogen sulfide. If mission water demands require immediate operation, reset the
OISS as soon as the water demand allows.
END OF WORK PACKAGE
0008 00-6
