separation of free oil from liquid carrier. Use parallel plates [or
vertical tubes] that are easily removable without dismantling packs and
without confined space entry. Provide adjustable surface oil overflow weir
with trough, oil outlet nozzle and stationary underflow baffle, oil
retention baffle positioned to prevent discharge of free oil that has been
separated from the carrier liquid in inlet and oil coalescing compartments.
Provide access to each plate pack [or tube bundle] from top. Each bundle
shall be equipped with handles or lifting rings. Plate designs that permit
cleaning of plate packs in place are not acceptable.
2.7.4
Wastewater Sampling Port
Equip inlet and outlet compartments, adjustable overflow effluent weir,
effluent trough, and wastewater outlet nozzle with wastewater sampling
ports permitting easy access for obtaining isokinetic influent and effluent
samples.
2.7.5
Connections
Connect the separator at the inlet and outlet pipe invert elevations
indicated. Follow equipment manufacturer's recommendation for setting and
adjusting top of weir elevations throughout unit.
2.7.6
Storage
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NOTE: Normally oil storage compartments will be
contained inside the separator and the requirement
for an adjacent waste oil storage tank will be
deleted. However, when conditions warrant, an
adjacent waste oil storage tank may be provided.In
order to size the waste oil tank, the designer shall
contact the activity to determine frequency of waste
oil collection performed at the activity. Designer
shall check current Federal and State requirements
governing the need and installation criteria for
secondary containment (e.g. double wall waste oil
tank).
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Provide oil and suspended solids collection, storage, and transfer systems
as an integral part of proposed oil-water separator system. As a minimum,
the separator oil storage compartment shall have a capacity of not less
than 10 percent of the total separator volume.[ The adjacent waste oil
tank shall have a capacity of [_____] liters gallons.]
PART 3
EXECUTION
3.1
INSPECTION
Inspect each component of separator for compliance with requirements
specified in PART 2
PRODUCTS. Redesign or modification of equipment to
comply with specified requirements, or necessary redesign or modification
following failure to meet specified requirements, shall receive particular
attention for adequacy and suitability. This element of inspection shall
encompass visual examinations and dimensional measurements.Noncompliance
with specified requirements, or presence of one or more defects preventing
or lessening maximum efficiency of separator operation, shall constitute
cause for rejection.
SECTION 11311
Page 19
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