MIL-HDBK-1005/9A
publishing, the states of California and New Jersey consider
bilge water as a hazardous waste. Some states may also require
the collection of compensating ballast water when refueling
occur within the restricted waters (in port) of the United
States. Refer to MIL-HDBK-1022 for guidance on the collection
and treatment of ballast water.
b) Ship-to-Shore Oily Wastewater Transfer. In 1970,
the U.S. Navy established a program to limit the discharge of
oily waste from Navy ships and crafts that paralleled
international, federal, state, and local regulations and
agreements concerning Oil Pollution Abatement (OPA). DOD
Directive 6050.15 prescribes operational standards for ships and
delegates implementation responsibilities. The Navy previously
collected oily waste via a floating oil water separator called a
"donut." However, donuts are now prohibited for environmental
reasons. Various OPA equipment have been installed on ships in
recent years to minimize oily waste pollutant discharges. Most
ships have oil water separators, waste oil tanks (WOTs), oily
waste holding tanks (OWHTs), and oily waste transfer pumps
(OWTPs). A brief description of these equipment is presented
below:
(1) An OWHT usually can contain the oily waste
generated in one-half day by a ship in auxiliary mode. It holds
at least 1,000 gallons.
(2) A WOT usually can contain the oily waste
separated during a 60-day mission.
(3) A OWTP is normally a segregated electric-
driven pump that pumps bilge water to the OWHT and waste oil or
oily waste to shore facilities. Some older ships use rotary
vane pumps, but the newer ones use sliding shoe pumps. Pumps
discharge at least at 10 psi pressure at the lowest weather deck
of the ship. See Table 11 for discharge pressures for each
class. These pumps normally have capacity of off-loading the
OWHT in approximately 1 to 2 hours. On aircraft carriers, the
off-loading time may take up to 4 hours.
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