§ 471.11 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 471.11 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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 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 emulsions.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth rolled with emulsions
Antimony	0.068	0.030
Lead	0.010	0.005
Oil and grease	0.468	0.281
TSS	0.960	0.457
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(b) Rolling spent soap solutions.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pound) of lead-tin-bismuth rolled with soap solutions
Antimony	0.125	0.055
Lead	0.019	0.009
Oil and grease	0.860	0.520
TSS	1.80	0.840
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(c) Drawing spent neat oils - subpart A - BPT. There shall be no discharge of process wastewater pollutants.

(d) Drawing spent emulsions.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth drawn with emulsions
Antimony	0.076	0.034
Lead	0.011	0.005
Oil and grease	0.526	0.316
TSS	1.08	0.513
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(e) Drawing spent soap solutions.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth drawn with soap solutions
Antimony	0.022	0.010
Lead	0.003	0.002
Oil and grease	0.149	0.090
TSS	0.306	0.146
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(f) Extrusion press and solution heat treatment contact cooling water.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds of lead-tin-bismuth heat treated
Antimony	4.14	1.850
Lead	0.605	0.288
Oil and grease	28.80	17.30
TSS	59.10	28.10
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(g) Extrusion press hydraulic fluid leakage.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth extruded
Antimony	0.158	0.071
Lead	0.023	0.011
Oil and grease	1.10	0.660
TSS	2.26	1.07
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(h) Continuous strip casting contact cooling water.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth cast by the continuous strip method
Antimony	0.003	0.001
Lead	0.0004	0.0002
Oil and grease	0.020	0.012
TSS	0.041	0.020
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(i) Semi-continuous ingot casting contact cooling water.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth ingot cast by the sem-continuous method
Antimony	0.085	0.038
Lead	0.013	0.006
Oil and grease	0.588	0.353
TSS	1.21	0.574
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(j) Shot casting contact cooling water.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth shot cast
Antimony	0.107	0.048
Lead	0.016	0.008
Oil and grease	0.746	0.448
TSS	1.53	0.728
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(k) Shot-forming wet air pollution control scrubber blowdown.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth shot formed
Antimony	1.69	0.753
Lead	0.247	0.118
Oil and grease	11.8	7.06
TSS	24.1	11.5
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(l) Alkaline cleaning spent baths.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth alkaline cleaned
Antimony	0.345	0.154
Lead	0.051	0.024
Oil and grease	2.40	1.44
TSS	4.92	2.34
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(m) Alkaline cleaning rinse.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth alkaline cleaned
Antimony	6.78	3.02
Lead	0.991	0.472
Oil and grease	47.2	28.4
TSS	96.8	46.0
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(n) Swaging spent emulsions.

Subpart A - BPT

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average
	mg/off-kg (pounds per million off-pounds) of lead-tin-bismuth swaged with emulsion
Antimony	0.005	0.002
Lead	0.0007	0.0004
Oil and grease	0.036	0.022
TSS	0.073	0.034
pH		(1)

¹ Within the range of 7.5 to 10.0 at all times.

(o) Degreasing spent solvents - subpart A - BPT. There shall be no discharge of process wastewater pollutants.

[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]