MIL-HDBK-1005/9A
site, if practical, and immediately after collecting sample.
Avoid column agitation and sunlight during test period. If
chemical addition is required, use jar test to select optimum
conditions and column test to simulate gravity separation.
Compare test results with most stringent applicable effluent
quality regulations. Refer to NAVFACINST 4862.5 for
treatability study guidance.
3.8
Collection and Transfer
3.8.1
Ship Oily Wastewater Generation
3.8.1.1
Ships. Collection of ship's oily wastewater should be
available at every berth. The collection may take the form of
truck or barge transfer or facility pipelines. See specific
guidance in MIL-HDBK-1025/2, Dockside Utilities for Ship
Service. Coordinate with environmental requirements to
determine the most life-cycle cost efficient, environmentally
acceptable collection system.
a) Sources. Primary sources of ship-generated oily
wastewater are bilges, oily waste holding tanks for collecting
lubricating oils and water contaminated fuel, condensate lines,
and tank cleaning water. Sonar dome pumping water is not
normally collected as part of the oily waste collection system.
The oil content in the bilge water normally varies from 0.01%
(100 ppm) to 1.0% (10,000 ppm). The rest is mostly saltwater of
unknown chloride content. The oil content of ship discharges
overboard is limited to 20 ppm or less within 12 nautical miles
of nearest land. In restricted ports, ballast water can be
discharged from most ships (other than tankers) through large
diameter piping directly overboard to a ship waste oily barges
(SWOB) or YON. Compensating ballast water can also be
discharged directly to a pier collection system providing the
liquid can gravity flow (from ship to pier connection) and back
pressure kept to a minimum. The Navy policy on classification
of oily wastewater is that the oily waste and waste oil (OWWO)
become a waste only upon removal from the ship. Generally bilge
water should be treated like any other waste. At the time of
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