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USACE / NAVFAC / AFCESA
UFGS-11311 (February 2002)
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Preparing Activity: NAVFAC
Superseding
UFGS-11311N (March 2001)
UNIFIED FACILITIES GUIDE SPECIFICATION
References are in agreement with UMRL dated 23 June 2005
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SECTION 11311
PARALLEL PLATE [OR VERTICAL TUBE], GRAVITY OIL-WATER SEPARATOR
02/02
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NOTE: This guide specification covers the
requirements for parallel plate, and vertical tube
gravity oil-water separators to remove free oil and
particulate matter from oily waste water.
Comments and suggestions on this guide specification
are welcome and should be directed to the technical
proponent of the specification. A listing of
technical proponents, including their organization
designation and telephone number, is on the Internet.
Recommended changes to a UFGS should be submitted as
a Criteria Change Request (CCR).
Use of electronic communication is encouraged.
Brackets are used in the text to indicate designer
choices or locations where text must be supplied by
the designer.
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NOTE: Vertical tube coalescers shall not be used on
Army projects
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NOTE: When influent conditions require treatment
beyond the capability of a parallel plate, vertical
tube, or API type gravity separator (e.g. presence
of a mechanical or chemical oil-water emulsion), the
designer shall prepare specifications to add one or
more of the following unit operations to the
separation system to comply with discharge criteria:
Hydrocyclone
Chemical pretreatment unit
Flocculator
Dissolved air floatation unit
Electrocoagulation unit
Filter membranes
SECTION 11311
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