§ 471.32 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

§ 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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.

Subpart C - BAT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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.

Subpart C - BAT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

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 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly 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]