MIL-HDBK-1130
Alarm Systems. Test alarm systems quarterly. When possible, a
3.3.16.3
station manned 24-hours per day should monitor remote water level alarms. A
roving operator should make periodic checks of pump wells.
Dehumidification. Through the observation ports and without
3.3.16.4
entering dehumidified spaces, weekly checks of the relative humidity should be
made and recorded. An average humidity of 35 percent should be maintained.
Erratic operation of mechanical dehumidifiers, or continuous operation for
unusually long period of time is an indication of leakage requiring
investigation. Humidistats should be checked and adjusted monthly for
accuracy of control and sensitivity at a dry-bulb temperature equal to the
pumproom temperature. Entry to the dehumidified spaces, following oxygen and
gas tests, should be limited to inspection of equipment therein and emergency
repairs/services of the dehumidifiers pump motors and control equipment.
Always close access doors as quickly as possible, and check that they are
provided with well-fitting airtight gaskets, and marked: "KEEP CLOSED--
DEHUMIDIFIED AREA." Inspect all other openings connecting dehumidified spaces
with the weather to be sure seals are intact.
Corrosion. Annually inspect all exposed metal, concrete surfaces,
3.3.16.5
and timber blocking for corrosion and deterioration while the drydock is
dewatered. Defects noticed in corrosion control system coatings and cathodic
protection should be corrected in accordance with methods and materials used
at inactivation.
Leaks. Dewatered drydocks and inactivated caissons should be
3.3.16.6
checked for the development of new leaks quarterly; significant leaks should
be eliminated. Minor leaks should be recorded and kept under observation as
required.
Clean-up. The coping areas, dock chamber, pipe gallery, and
3.3.16.7
tunnels should be kept free of trash, debris, and accumulations of all sorts.
Storage of material of any type in and adjacent to inactivated drydocks should
be only by authorization.
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