Code of Federal Regulations (alpha)

CFR /  Title 40  /  Part 471  /  Sec. 471.32 Effluent limitations representing the degree of effluenteconomically achievable (BAT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):

(a) Rolling spent neat oils--subpart C--BAT. There shall be no discharge of process wastewater pollutants.

(b) Rolling spent emulsions.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.063 0.026Nickel...................................... 0.094 0.063Fluoride.................................... 10.1 4.49------------------------------------------------------------------------

(c) Rolling contact cooling water.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.028 0.011Nickel...................................... 0.042 0.028Fluoride.................................... 4.49 1.99------------------------------------------------------------------------

(d) Tube Reducing Spent Lubricant--subpart C--BAT. (1) There shall be no discharge of process wastewater pollutants except as provided under paragraph (d)(2) of this section.

(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 subparagraph (d)(2) of this section, the actions described in paragraph (d)(4) of this section shall be taken, and the demonstration required under subparagraph (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 subparagraph (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--BAT. There shall be no discharge of process wastewater pollutants.

(f) Drawing spent emulsions.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.036 0.015Nickel...................................... 0.053 0.036Fluoride.................................... 5.68 2.52------------------------------------------------------------------------

(g) Extrusion spent lubricants--subpart C--BAT. There shall be no discharge of process wastewater pollutants.

(h) Extrusion press or solution heat treatment contact cooling water.

Subpart C--BAT------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/off-kg (pounds per

million off-pounds) of

extruded nickel-cobalt

heat treated

---------------------------Chromium.................................... 0.031 0.013Nickel...................................... 0.046 0.031Fluoride.................................... 4.95 2.20------------------------------------------------------------------------

(i) Extrusion press hydraulic fluid leakage.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.086 0.034Nickel...................................... 0.128 0.086Fluoride.................................... 13.8 6.13------------------------------------------------------------------------

(j) Forging equipment cleaning wastewater.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.002 0.0006Nickel...................................... 0.002 0.002Fluoride.................................... 0.238 0.106------------------------------------------------------------------------

(k) Forging contact cooling water.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.018 0.007Nickel...................................... 0.026 0.018Fluoride.................................... 2.82 1.25------------------------------------------------------------------------

(l) Forging press hydraulic fluid leakage.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.069 0.028Nickel...................................... .103 0.069Fluoride.................................... 11.2 4.94------------------------------------------------------------------------

(m) Forging spent lubricants--subpart C--BAT. There shall be no discharge of process wastewater pollutants.

(n) Stationary casting contact cooling water.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.448 0.182Nickel...................................... .666 .448Fluoride.................................... 72.0 32.0------------------------------------------------------------------------

(o) Vacuum melting steam condensate--subpart C--BAT. There shall be no allowance for the discharge of wastewater pollutants.

(p) Metal powder production atomization wastewater.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.970 0.393Nickel...................................... 1.44 .970Fluoride.................................... 156 69.2------------------------------------------------------------------------

(q) Annealing and solution heat treatment contact cooling water--subpart C--BAT. There shall be no allowance for the discharge of wastewater pollutants.

(r) Wet air pollution control scrubber blowdown.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.300 0.122Nickel...................................... .446 .300Fluoride.................................... 48.2 21.4------------------------------------------------------------------------

(s) Surface treatment spent baths.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.346 0.141Nickel...................................... .514 .346Fluoride.................................... 55.7 24.7------------------------------------------------------------------------

(t) Surface treatment rinse.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.873 0.354Nickel...................................... 1.30 .873Fluoride.................................... 141 62.3------------------------------------------------------------------------

(u) Alkaline cleaning spent baths.

Subpart C--BAT------------------------------------------------------------------------

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..................................... 0.013 0.005Nickel....................................... 0.019 0.013Fluoride..................................... 2.02 0.895------------------------------------------------------------------------

(v) Alkaline cleaning rinse.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.086 0.035Nickel...................................... 0.128 0.086Fluoride.................................... 13.9 6.15------------------------------------------------------------------------

(w) Molten salt rinse.

Subpart C--BAT------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day averge------------------------------------------------------------------------

mg/off-kg (pounds per

million off-pounds) of

nickel-cobalt treated with

molten salt

---------------------------Chromium.................................... 0.312 0.127Nickel...................................... 0.464 0.312Fluoride.................................... 50.2 22.3------------------------------------------------------------------------

(x) Ammonia rinse.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.006 0.002Nickel...................................... 0.008 0.006Fluoride.................................... 0.881 0.391------------------------------------------------------------------------

(y) Sawing or grinding spent emulsions.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.015 0.006Nickel...................................... 0.022 0.015Fluoride.................................... 2.35 1.04------------------------------------------------------------------------

(z) Sawing or grinding rinse.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.067 0.027Nickel...................................... 0.100 0.067Fluoride.................................... 10.8 4.78------------------------------------------------------------------------

(aa) Steam cleaning condensate.

Subpart C--BAT------------------------------------------------------------------------

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..................................... 0.011 0.005Nickel....................................... 0.017 0.011Fluoride..................................... 1.79 0.795------------------------------------------------------------------------

(bb) Hydrostatic tube testing and ultrasonic testing wastewater--subpart C--BAT. There shall be no allowance for the discharge of process wastewater pollutants.

(cc) Degreasing spent solvents--subpart C--BAT. There shall be no discharge of process wastewater pollutants.

(dd) Dye penetrant testing wastewater.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.079 0.032Nickel...................................... 0.117 0.079Fluoride.................................... 12.7 5.63------------------------------------------------------------------------

(ee) Electrocoating rinse.

Subpart C--BAT------------------------------------------------------------------------

Maximum for

Pollutant or pollutant property Maximum for monthly

any 1 day average------------------------------------------------------------------------

mg/off-kg (pounds per

million off-pounds) of

nickel-cobalt

electrocoated

---------------------------Chromium.................................... 1.25 0.506Nickel...................................... 1.86 1.25Fluoride.................................... 201 89.0------------------------------------------------------------------------

(ff) Miscellaneous wastewater sources.

Subpart C--BAT------------------------------------------------------------------------

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.................................... 0.091 0.037Nickel...................................... 0.136 0.091Fluoride.................................... 14.7 6.50------------------------------------------------------------------------ [50 FR 34270, Aug. 23, 1985; 51 FR 2885, Jan. 22, 1986, as amended at 54 FR 11348, Mar. 17, 1989; 54 FR 13606, Apr. 4, 1989]