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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter N - Effluent Guidelines and Standards |
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Part 471 - Nonferrous Metals Forming and Metal Powders Point Source Category |
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Subpart I - Zirconium-Hafnium Forming Subcategory |
§ 471.93 - New source performance standards (NSPS).
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§ 471.93 New source performance standards (NSPS).
Any new source subject to this subpart must achieve the following new source performance standards (NSPS). The mass of pollutant in the zirconium-hafnium process wastewater shall not exceed the following values:
(a) Rolling spent neat oils - subpart I - NSPS. There shall be no discharge of process wastewater pollutants.
(b) Drawing spent lubricants - subpart I - NSPS. There shall be no discharge of process wastewater pollutants.
(c) Extrusion spent emulsions - subpart I - NSPS. There shall be no discharge of process wastewater pollutants.
(d) Extrusion press hydraulic fluid leakage.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium extruded Chromium 0.104 0.043 Cyanide 0.069 0.029 Nickel 0.455 0.301 Ammonia 31.6 13.9 Fluoride 14.1 6.26 Oil and grease 4.74 2.85 TSS 9.72 4.62 pH (1) (1) (e) Swaging spent neat oils - subpart I - NSPS. There shall be no discharge of process wastewater pollutants.
(f) Heat treatment contact cooling water.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium heat treated Chromium 0.015 0.006 Cyanide 0.010 0.004 Nickel 0.066 0.044 Ammonia 4.57 2.01 Fluoride 2.04 0.906 Oil and grease 0.686 0.412 TSS 1.41 0.669 pH (1) (1) (g) Tube Reducing Spent Lubricant - subpart I - NSPS:
(1) There shall be no discharge of process wastewater pollutants except as provided under paragraph (g)(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 (g)(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 (g)(2) of this section, the actions described in paragraph (g)(4) of this section shall be taken, and the demonstration required under paragraph (g)(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 (g)(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 (g)(2) of this section; or
(ii) Substitutes a new tube reducing lubricant and thereafter complies with the requirements of paragraph (g)(3) of this section; or
(iii) Determines the source of the pollutant whose concentration exceeded the level specified in paragraph (g)(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 (g)(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.
(h) Surface treatment spent baths.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium surface treated Chromium 0.150 0.061 Cyanide 0.099 0.041 Nickel 0.653 0.432 Ammonia 45.3 20.0 Fluoride 20.0 8.98 Oil and grease 6.80 4.08 TSS 14.0 6.63 pH (1) (1) (i) Surface treatment rinse.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium surface treated Chromium 0.391 0.160 Cyanide 0.258 0.107 Nickel 1.71 1.13 Ammonia 119 52.1 Fluoride 52.9 23.5 Oil and grease 17.8 10.7 TSS 36.4 17.3 pH (1) (1) (j) Alkaline cleaning spent baths.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium alkaline cleaned Chromium 0.704 0.288 Cyanide 0.464 0.192 Nickel 3.07 2.03 Ammonia 214 93.8 Fluoride 95.2 42.3 Oil and grease 32.0 19.2 TSS 65.6 31.2 pH (1) (1) (k) Alkaline cleaning rinse.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium alkaline cleaned Chromium 1.38 0.565 Cyanide 0.911 0.377 Nickel 6.03 3.99 Ammonia 419 184 Fluoride 187 82.9 Oil and grease 62.8 37.7 TSS 129 61.3 pH (1) (1) (l) Sawing or grinding spent emulsions.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium sawed or ground with emulsions Chromium 0.124 0.051 Cyanide 0.082 0.034 Nickel 0.540 0.357 Ammonia 37.5 16.50 Fluoride 16.7 7.42 Oil and grease 5.62 3.37 TSS 11.5 5.48 pH (1) (1) (m) Wet air pollution control scrubber blowdown - subpart I - NSPS. There shall be no allowance for the discharge of process wastewater pollutants.
(n) Degreasing spent solvents - subpart I - NSPS. There shall be no discharge of process wastewater pollutants.
(o) Degreasing rinse - subpart I - NSPS. There shall be no discharge of process wastewater pollutants
(p) Molten salt rinse.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium treated with molten salt Chromium 0.333 0.136 Cyanide 0.220 0.091 Nickel 1.45 0.960 Ammonia 101 44.3 Fluoride 45.0 20.0 Oil and grease 15.1 9.07 TSS 31.0 14.8 pH (1) (1) (q) Sawing or grinding contact cooling water.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium sawed or ground with contact cooling water Chromium 0.142 0.058 Cyanide 0.093 0.039 Nickel 0.617 0.408 Ammonia 42.8 18.8 Fluoride 19.1 8.48 Oil and grease 6.42 3.85 TSS 13.2 6.26 pH (1) (1) (r) Sawing or grinding rinse.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of sawed or ground zirconium-hafnium rinsed Chromium 0.079 0.033 Cyanide 0.052 0.022 Nickel 0.346 0.229 Ammonia 24.0 10.6 Fluoride 10.7 4.75 Oil and Grease 3.60 2.16 TSS 7.38 3.51 pH (1) (1) (s) Sawing or grinding spent neat oils - subpart I - NSPS. There shall be no discharge or process wastewater pollutants.
(t) Inspection and testing wastewater.
Subpart I - NSPS
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/off-kg (pounds per million off-pounds) of zirconium-hafnium tested Chromium 0.007 0.003 Cyanide 0.005 0.002 Nickel 0.030 0.020 Ammonia 2.06 0.903 Fluoride 0.917 0.407 Oil and grease 0.308 0.185 TSS 0.632 0.301 pH (1) (1) [50 FR 34270, Aug. 23, 1985; 51 FR 2888, Jan. 22, 1986, as amended at 54 FR 11351, Mar. 17, 1989]