[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR471.32] [Page 707-710] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 471_NONFERROUS METALS FORMING AND METAL POWDERS POINT SOURCE CATEGORY--Table of Contents Subpart C_Nickel-Cobalt Forming Subcategory Sec. 471.32 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically 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 0.026 Nickel...................................... 0.094 0.063 Fluoride.................................... 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 0.011 Nickel...................................... 0.042 0.028 Fluoride.................................... 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. (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 [[Page 708]] 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 0.015 Nickel...................................... 0.053 0.036 Fluoride.................................... 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 0.013 Nickel...................................... 0.046 0.031 Fluoride.................................... 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 0.034 Nickel...................................... 0.128 0.086 Fluoride.................................... 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 0.0006 Nickel...................................... 0.002 0.002 Fluoride.................................... 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 0.007 Nickel...................................... 0.026 0.018 Fluoride.................................... 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 0.028 Nickel...................................... .103 0.069 Fluoride.................................... 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. [[Page 709]] 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 0.182 Nickel...................................... .666 .448 Fluoride.................................... 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 0.393 Nickel...................................... 1.44 .970 Fluoride.................................... 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 0.122 Nickel...................................... .446 .300 Fluoride.................................... 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 0.141 Nickel...................................... .514 .346 Fluoride.................................... 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 0.354 Nickel...................................... 1.30 .873 Fluoride.................................... 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 0.005 Nickel....................................... 0.019 0.013 Fluoride..................................... 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 0.035 Nickel...................................... 0.128 0.086 Fluoride.................................... 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 0.127 Nickel...................................... 0.464 0.312 Fluoride.................................... 50.2 22.3 ------------------------------------------------------------------------ (x) Ammonia rinse. [[Page 710]] 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 0.002 Nickel...................................... 0.008 0.006 Fluoride.................................... 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 0.006 Nickel...................................... 0.022 0.015 Fluoride.................................... 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 0.027 Nickel...................................... 0.100 0.067 Fluoride.................................... 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 0.005 Nickel....................................... 0.017 0.011 Fluoride..................................... 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 0.032 Nickel...................................... 0.117 0.079 Fluoride.................................... 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 0.506 Nickel...................................... 1.86 1.25 Fluoride.................................... 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 0.037 Nickel...................................... 0.136 0.091 Fluoride.................................... 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]