Water and wastewater treatment units are permitted by rule, provided
the following conditions of this section are met.
(1) The facility performs only the following functions:
(A) disinfection;
(B) softening;
(C) filtration;
(D) flocculation;
(E) stabilization;
(F) taste and odor control;
(G) clarification;
(H) carbonation;
(I) sedimentation;
(J) neutralization;
(K) chlorine removal;
(L) activated sludge treatment, anaerobic treatment, and associated
control of gases from these treatments;
(M) aerobic oxidation/biodegration using oxygen or peroxide
in the absence of nitrogen or other gas that would cause stripping of volaltile
organic compounds (VOC) from the water;
(N) stripping VOC, ammonia, or other air contaminants from
the water with air or other gas, provided the stripped gases are controlled
with an abatement system that meets the requirements of §106.533(5) of
this title (relating to Water and Soil Remediation). For ammonia or hydrogen
chloride (HCl) or other acid gas emissions, abatement may include a water
or caustic scrubbing system as a means of complying with this section. Final
emissions of HCl resulting from combustion of chlorine or chlorine-containing
compounds shall not exceed 0.1 pounds per hour;
(O) liquid phase separation of VOC and water in which:
(i) the sum of the partial pressures of all species of VOC
in any sample is less than 1.5 psia; or
(ii) the separator is enclosed and emissions are vented through
an emission abatement system meeting the requirements specified previously
for stripped VOC and ammonia;
(2) Chlorine or sulfur dioxide (SO 2) shall be
used only in containers approved by the United States Department of Transportation
and emissions of chlorine or SO2 from treatment of water or decontamination
of equipment at any water treatment plant shall not exceed ten tons per year.
(3) The following shall not be permitted by rule under this
section:
(A) gas stripping or aeration facilities where VOC or other
air contaminants are stripped from water directly to the atmosphere;
(B) disposal facilities using land surface treatment;
(C) surface facilities associated with injection wells;
(D) cooling towers in which VOC or other air contaminants may
be stripped to the atmosphere.
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