TM 5-814-8
BPT and BAT standards for metals finishing (mg/L)
Table 4-5.
BAT
BPT
Daily
30 Day
30 Day
Daily
Maximum
Average
Maximum
Average
Parameter
Cadmium (T)a
0.26
0.69
0.69
0.26
2.77
1.71
2.77
1.71
Chromium (T)
2.07
3.38
3.38
2.07
Copper (T)
0.69
0.43
0.43
0.69
Lead (T)
2.38
3.96
3.98
2.38
Nickel (T)
0.43
0.24
0.43
0.24
Silver (T)
1.48
2.61
1.48
2.61
Zinc (T)
0.65 "
1.20
1.20
0.65
Cyanide (T)
--
TTOb
2.13
2.13
--
--
26
52
Oil and Grease
--
--
31
60
TSS
pH
Cyanide (A)d
0.86
0.32
0:86
0:32
All values in mg/L except pH.
a
(T) = Total
b
TTO = Total Toxic Organics, which is the summation of all value
greater than 0.1 mg/L for toxic organics.
c
Within 6.0 to 9.0 standard units.
d
A means amenable to alkaline chlorination. This value is an alter-
native cyanide value for industrial facilities with cyanide
treatment.
40 CFR Part 433.
Source:
Table 4-6. U.S. EPA secondary treatment standards
across the nation by 1985. Treatment facilities
for municipal dischargers
located either in areas where the number and
Effluent Concentration Minimum
quantity of discharges is large compared to the
Monthly
Weekly
Removal
flow in the stream or along waterways where very
Parameter
Average
Average
(%)
stringent quality standards have been established
BOD (mg/L)
30
45
85
may be required to provide a level of treatment
TSS (mg/L)
30
45
85
c o n s i d e r a b l y higher than that required by
Fecal Coliforms
--
(organisms/100 mL)
200
400
technology-based standards or by the U.S. EPA
pH
Value must be between 6.0 and 9.O
secondary treatment criteria. Present criteria for
at all times.
the establishment of these water quality deter-
mined effluent limitations are contained in Qual-
f. Water quality determined effluent limitations.
The Clean Water Act contains specific provisions
ity Criteria for Water. Typically, establishment of
for the establishment of efflulent limitations more
water quality determined limitations requires
stringent than technology-based guidelines where
mathematical modeling of the stream to establish
necessary for the maintenance of water quality
the allowable discharge at low flow conditions.
standards in a stream. The Act also required the
Water quality modeling is not an exact science
attainment of "fishable-swimmable" water quality
and significant room for negotiation usually ex-
4-12
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