TM 5-814-8
ment standards are expected for hospitals. The
ists in establishing effluent limitations which are
U.S. EPA expects that these standards will be
compatible with the required stream water qual-
ity.
set by state and local requirements.
.
(2) Electroplating and metal finishing. Pre-
4-5. Pretreatment of industrial wastes
treatment standards for electroplating (40 CFR
discharged to municipal treatment sys-
Part 413) and metal finishing (40 CFR Part 433)
tems
are in effect and include regulation of TTO as
discussed above. The standards applicable to
a. Pretreatment programs. The Clean Water
Act authorizes the U.S. EPA to establish pre-
electroplating are presented in tables 4-7 and
treatment standards for industries discharging
4-8. The regulations indicate that after October
wastewaters to municipal treatment systems. Mu-
12, 1982, no user introducing wastewater to a
nicipalities receiving industrial wastes must de-
POTW may change the use of process wastewater
velop local pretreatment programs which are
or dilute the wastewater as a partial or total
described in the U.S. EPA pretreatment regula-
substitute for adequate treatment to achieve
tions.
compliance with the standard. The pretreatment
(1) Photographic processing, explosives man-
standards for metal finishing are summarized in
ufacturing, laundries, and hospitals. Photographic
.
table 4-9. These standards cover both existing
processing, explosives manufacturing, and laun-
and new sources. Note that the only difference
dries having been exempted from BAT Standards
between the existing and new source category is
were also exempted from national guidelines for
the stricter limitation proposed for cadmium.
pretreatment standards. In addition, no pretreat-
Table 4-7. Pretreatment standards for
electroplating point source category,
existing sources, all subcategories,
discharge of 10,000 gpd or less
Basic Standard (mg/L)
3 0 Daya
Daily
4 Day
Parameter
Maximum
Average
Average
CN, Ab
1.5
500
2.7
Pb
0.6
0.4
0.3
1.2
0.7
0.5
Cd
TTOC
4.57
Applicable only with consent of the controlling authority, in the
absence of strong chelating agents, after reduction of hexavalent
chrome, and after neutralization using calcium oxide or hydroxide.
applicable to discharges combined with regulated discharges that
have 30-day average standards.
b
CN, A = Cyanide Amendable to Chlorination
C
TTO = Total Toxic Organics, standards reported are proposed.
40 CFR Part 413
Source:
4-13
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