Loading (50 kb)...'
(continued)
repaired or
forged
---------------------------
Chromium.................................... 0.273 0.112
Zinc........................................ 0.904 0.378
Ammonia..................................... 8.25 36.3
Fluoride.................................... 36.9 16.4
------------------------------------------------------------------------
[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]
§ 471.25 Pretreatment standards for new sources (PSNS).
top
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources (PSNS). The mass of wastewater pollutants in magnesium forming process wastewater introduced into a POTW shall not exceed the following values:
(a) Rolling spent emulsions.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
rolled with
emulsions
---------------------------
Chromium.................................... 0.028 0.011
Zinc........................................ 0.076 0.032
Ammonia..................................... 9.95 4.37
Fluoride.................................... 4.44 1.97
------------------------------------------------------------------------
(b) Forging spent lubricants—Subpart B—PSNS. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for any 1 Maximum for
Pollutant or pollutant property day monthly average
------------------------------------------------------------------------
mg/off-kg (pounds
per million off-
pounds) of forged
magnesium cooled
with water
-------------------------------------
Chromium.......................... 0.107 0.044
Zinc.............................. 0.295 0.122
Ammonia........................... 38.5 17.0
Fluoride.......................... 17.2 7.63
------------------------------------------------------------------------
(d) Forging equipment cleaning wastewater.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
forged
--------------------------
Chromium..................................... 0.002 0.0006
Zinc......................................... 0.004 0.002
Ammonia...................................... 0.532 0.234
Fluoride..................................... 0.238 0.106
------------------------------------------------------------------------
(e) Direct chill casting contact cooling water.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
cast with
direct chill
methods
---------------------------
Chromium.................................... 1.46 0.593
Zinc........................................ 4.03 1.66
Ammonia..................................... 527 232
Fluoride.................................... 235 105
------------------------------------------------------------------------
(f) Surface treatment spent baths.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
surface
treated
---------------------------
Chromium.................................... 0.173 0.070
Zinc........................................ 0.476 0.196
Ammonia..................................... 62.1 27.3
Fluoride.................................... 27.8 12.3
------------------------------------------------------------------------
(g) Surface treatment rinse.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
surface
treated
---------------------------
Chromium.................................... 0.700 0.284
Zinc........................................ 1.93 0.794
Ammonia..................................... 252 111
Fluoride.................................... 113 49.9
------------------------------------------------------------------------
(h) Sawing or grinding spent emulsions.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
sawed or
ground
---------------------------
Chromium.................................... 0.007 0.003
Zinc........................................ 0.020 0.008
Ammonia..................................... 2.60 1.15
Fluoride.................................... 1.16 0.515
------------------------------------------------------------------------
(i) Degreasing spent solvents—Subpart B—PSNS. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B_PSNS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
magnesium
sanded and
repaired or
forged
---------------------------
Chromium.................................... 0.229 0.093
Zinc........................................ 0.632 0.260
Ammonia..................................... 82.5 36.3
Fluoride.................................... 36.9 16.4
------------------------------------------------------------------------
[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]
§ 471.26 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]
top
Subpart C—Nickel-Cobalt Forming Subcategory
top
§ 471.30 Applicability; description of the nickel-cobalt forming subcategory.
top
This subpart applies to discharges of pollutants to waters of the United States, and introductions of pollutants into publicly owned treatment works from the process operations of the nickel-cobalt forming subcategory.
§ 471.31 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
top
Except as provided in 40 CFR 125.30–125.32, any existing point source sub-
ject to this subpart must achieve the following effluent limitations for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
(a) Rolling spent neat oils—Subpart C—BPT. There shall be no discharge of process wastewater pollutants.
(b) Rolling spent emulsions.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
rolled with
emulsions
---------------------------
Chromium.................................... 0.075 0.031
Nickel...................................... 0.327 0.216
Fluoride.................................... 10.1 4.49
Oil and grease.............................. 3.4 2.04
TSS......................................... 6.97 3.32
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(c) Rolling contact cooling water.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
rolled with
water
---------------------------
Chromium.................................... 1.66 0.679
Nickel...................................... 7.24 4.79
Fluoride.................................... 225 99.6
Oil and grease.............................. 75.4 45.3
TSS......................................... 155 73.5
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(d) Tube Reducing Spent Lubricant—Subpart C—BPT.
(1) There shall be no discharge of process wastewater pollutants except as provided under paragraph (d)(2) of this section.
(2) Process wastewater pollutants may be discharged, with no allowance for any pollutants discharged, provided the facility owner or operator demonstrates, on the basis of analytical methods set forth in or approved pursuant to 40 CFR part 136, that the concentrations of nitrosamine compounds in the wastewater discharged from the tube reducing process do not exceed 0.050 mg/l of N-nitrosodimethylamine, 0.020 mg/l of N-nitrosodiphenylamine, and 0.020 mg/l of N-nitrosodi-n-propylamine.
(3) The demonstration required under paragraph (d)(2) of this section shall be made once per month until the demonstration has been made for all three nitrosamine compounds for six consecutive months, after which time the demonstration may be made once per quarter. If a sample is found to contain any of the foregoing nitrosamine compounds at concentrations greater than those specified in paragraph (d)(2) of this section, the actions described in paragraph (d)(4) of this section shall be taken, and the demonstration required under paragraph (d)(2) of this section shall be made once per month until it has been made for all three nitrosamine compounds for six consecutive months.
(4) If sampling results show that any of the foregoing nitrosamine compounds is present in the process wastewater at concentrations greater than those specified in paragraph (d)(2) of this section, the facility owner or operator shall ensure that, within thirty days of receiving written notification of the sampling results, there is no further discharge of tube reducing spent lubricant wastewater until the owner or operator:
(i) Performs a subsequent analysis which demonstrates that the concentrations of the foregoing nitrosamine compounds do not exceed the levels specified in paragraph (d)(2) of this section; or
(ii) Substitutes a new tube reducing lubricant and thereafter complies with the requirements of paragraph (d)(3) of this section; or
(iii) Determines the source of the pollutant whose concentration exceeded the level specified in paragraph (d)(2) of this section and demonstrates to the satisfaction of the NPDES issuing authority that such source has been eliminated.
(5) The concentration limits specified in paragraph (d)(2) of this section apply at the point of discharge from the tube reducing process. However, sampling after the tube reducing wastewater has been commingled with other wastewaters is permitted if:
(i) Any dilution caused by the other wastewaters is taken into account in determining the appropriate (i.e., lower) allowable discharge concentration; and
(ii) An analytical method of sufficient sensitivity is used to measure the levels of each of the foregoing nitrosamine compounds in the wastewaters being sampled.
(e) Drawing spent neat oils—Subpart C—BPT. There shall be no discharge of process wastewater pollutants
(f) Drawing spent emulsions.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt drawn
with
emulsions
---------------------------
Chromium.................................... 0.042 0.017
Nickel...................................... 0.183 0.121
Fluoride.................................... 5.68 2.52
Oil and grease.............................. 1.91 1.15
TSS......................................... 3.91 1.86
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(g) Extrusion spent lubricants—Subpart C—BPT. There shall be no discharge of process wastewater pollutants.
(h) Extrusion press or solution heat treatment contact cooling water.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt heat
treated
---------------------------
Chromium.................................... 0.037 0.015
Nickel...................................... 0.160 0.106
Fluoride.................................... 4.95 2.20
Oil and grease.............................. 1.67 0.999
TSS......................................... 3.41 1.63
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(i) Extrusion press hydraulic fluid leakage.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
extruded
---------------------------
Chromium.................................... 0.102 0.042
Nickel...................................... 0.446 0.295
Fluoride.................................... 13.8 6.13
Oil and grease.............................. 4.64 2.79
TSS......................................... 9.51 4.53
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(j) Forging equipment cleaning wastewater.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
forged
---------------------------
Chromium.................................... 0.018 0.007
Nickel...................................... 0.077 0.051
Fluoride.................................... 2.38 1.06
Oil and grease.............................. 0.800 0.480
TSS......................................... 1.640 0.780
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(k) Forging contact cooling water.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
forged
nickel-
cobalt
cooled with
water
---------------------------
Chromium.................................... 0.209 0.086
Nickel...................................... 0.910 0.602
Flouride.................................... 28.2 12.5
Oil and grease.............................. 9.48 5.69
TSS......................................... 19.5 9.25
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(l) Forging press hydraulic fluid leakage.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
forged
---------------------------
Chromium.................................... 0.083 0.034
Nickel...................................... 0.359 0.238
Fluoride.................................... 11.2 4.94
Oil and grease.............................. 3.74 2.25
TSS......................................... 7.67 3.65
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(m) Forging spent lubricants—Subpart C—BPT. There shall be no discharge of process wastewater pollutants.
(n) Stationary casting contact cooling water.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt cast
with
stationary
casting
methods
---------------------------
Chromium.................................... 5.33 2.18
Nickel...................................... 23.3 15.4
Fluoride.................................... 720 320
Oil and grease.............................. 242 145
TSS......................................... 496 236
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(o) Vacuum melting steam condensate—Subpart C—BPT. There shall be no allowance for the discharge of process wastewater pollutants.
(p) Metal powder production atomization wastewater.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt metal
powder
atomized
---------------------------
Chromium.................................... 1.16 0.472
Nickel...................................... 5.03 3.33
Fluoride.................................... 156 69.2
Oil and grease.............................. 52.4 31.5
TSS......................................... 108 51.1
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(q) Annealing and solution heat treatment contact cooling water—Subpart C—BPT. There shall be no allowance for the discharge of process wastewater pollutants.
(r) Wet air pollution control scrubber blowdown.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
formed
---------------------------
Chromium.................................... 0.357 0.146
Nickel...................................... 1.56 1.03
Fluoride.................................... 48.2 21.4
Oil and grease.............................. 16.2 9.72
TSS......................................... 33.2 15.8
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(s) Surface treatment spent baths.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
surface
treated
---------------------------
Chromium.................................... 0.412 0.169
Nickel...................................... 1.80 1.19
Fluoride.................................... 55.7 24.7
Oil and grease.............................. 18.7 11.2
TSS......................................... 38.4 18.3
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(t) Surface treatment rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
surface
treated
---------------------------
Chromium.................................... 10.4 4.25
Nickel...................................... 45.3 30.0
Fluoride.................................... 1410 623
Oil and grease.............................. 472 283
TSS......................................... 968 460
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(u) Alkaline cleaning spent baths.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
alkaline
cleaned
-------------------------
Chromium...................................... 0.015 1.52
Nickel........................................ 16.2 10.7
Fluoride...................................... 502 223
Oil and grease................................ 169 101
TSS........................................... 346 165
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(v) Alkaline cleaning rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-cobalt
alkaline
cleaned
-------------------------------
Chromium................................ 1.03 0.420
Nickel.................................. 4.48 2.96
Fluoride................................ 139 61.5
Oil and grease.......................... 46.6 28.0
TSS..................................... 95.6 45.5
pH...................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(w) Molten salt rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
treated with
molten salt
---------------------------
Chromium.................................... 3.72 1.52
Nickel...................................... 16.2 10.7
Fluoride.................................... 502 223
Oil and grease.............................. 169 101
TSS......................................... 346 165
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(x) Ammonia rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
treated with
ammonia
solution
---------------------------
Chromium.................................... 0.007 0.003
Nickel...................................... 0.029 0.019
Fluoride.................................... 0.881 0.391
Oil and grease.............................. 0.296 0.178
TSS......................................... 0.607 0.289
pH.......................................... ............ (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(y) Sawing or grinding spent emulsions.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt sawed
or ground
with
emulsions
---------------------------
Chromium.................................... 0.018 0.007
Nickel...................................... 0.076 0.050
Fluoride.................................... 2.35 1.04
Oil and grease.............................. 0.788 0.473
TSS......................................... 1.62 0.769
pH.......................................... ............ (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(z) Sawing or grinding rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
sawed or
ground
nickel-
cobalt
rinsed
---------------------------
Chromium.................................... 0.797 0.326
Nickel...................................... 3.48 2.30
Fluoride.................................... 108 47.8
Oil and grease.............................. 36.2 21.7
TSS......................................... 74.2 35.3
pH.......................................... ............ (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(aa) Steam Cleaning Condensate.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt steam
cleaned
---------------------------
Chromium.................................... 0.013 0.006
Nickel...................................... 0.058 0.039
Fluoride.................................... 1.79 0.795
Oil and grease.............................. 0.602 0.361
TSS......................................... 1.24 0.587
pH.......................................... ............ (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(bb) Hydrostatic tube testing and ultrasonic testing wastewater—Subpart C—BPT. There shall be no allowance for the discharge of process wastewater pollutants.
(cc) Degreasing spent solvents—Subpart C—BPT. There shall be no discharge of process wastewater pollutants.
(dd) Dye penetrant testing wastewater.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
tested with
dye
penetrant
method
---------------------------
Chromium.................................... 0.094 0.039
Nickel...................................... 0.409 0.271
Fluoride.................................... 12.7 5.63
Oil and grease.............................. 4.26 2.56
TSS......................................... 8.74 4.16
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.
(ee) Electrocoating rinse.
Subpart C_BPT
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/off-kg
(pounds per
million off-
pounds) of
nickel-
cobalt
electrocoate
d
---------------------------
Chromium.................................... 1.48 0.607
Nickel...................................... 6.47 4.28
Fluoride.................................... 201 89.0
Oil and grease.............................. 67.4 40.5
TSS......................................... 138 65.7
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------ (continued)