MIL-HDBK-1003/7
a)
Chemical wastes resulting from water treatment, backwash, and drainage.
b)
Chemical feed area and storage area drains.
c)
Laboratory drains.
d)
Boiler tube chemical cleaning wastes.
e) Sanitary wastewater. This waste source consists of sanitary wastes
originating from plant buildings with sanitary facilities (e.g., restroom toilets and
sinks).
f) Steam boiler blowdown. This wastewater is released from the boiler
drums to maintain a sufficient water quality in the boiler.
g) Cooling tower water blowdown. This source is present only if cooling
towers are employed to remove heat from the steam cycle. This wastewater is released
from the cooling water tower to maintain water quality.
h) Plant drains. This source is a result of pump seal water overflows and
miscellaneous equipment water drains.
i) Area washdown drains. This wastewater results when plant personnel use
hoses to wash down certain equipment and areas in and around plant buildings. For
example, floors such as in the scrubber, turbine, and service buildings may be
periodically flushed.
j) Oily waste treatment system. Wastewater from this source is a result of
treating washdown water from such areas as fuel oil storage, lube oil storage,
transformers, service buildings, and turbine building.
k) Ash handling system (from bottom ash removal transport system).
Any
discharge requires pretreatment for clarification and neutralization.
l) Flue gas desulfurization (FGD). Under normal conditions, process water
within the scrubber system is recirculated. At times, however, water quality may
degrade to a point where some must be released as a wastewater.
m)
Storm water runoff.
n) Runoff from coal storage areas and solid waste storage areas.
The
wastewater must be pretreated before discharge.
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