Skip to main content
Find a Lawyer

Code of Federal Regulations Title 40. Protection of Environment § 40.421.294 Standards of performance for new sources

Current as of January 02, 2025 | Updated by Findlaw Staff

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Tin smelter SO2 scrubber.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of crude tapped tin produced

Arsenic

12.790

5.703

Lead

2.575

1.196

Iron

11.040

5.611

Tin

3.495

2.024

Total suspended solids

138.000

110.400

pH

(1)

(1)

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

(b) Dealuminizing rinse.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of dealuminized scrap produced

Lead

0.010

0.005

Cyanide (total)

0.007

0.003

Fluoride

1.225

0.697

Tin

0.013

0.008

Total suspended solids

0.525

0.420

pH

(1)

(1)

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

(c) Tin mud acid neutralization filtrate.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of neutralized dewatered tin mud produced

Lead

1.413

0.656

Cyanide (total)

1.009

0.404

Fluoride

176.600

100.400

Tin

1.918

1.110

Total suspended solids

75.710

60.560

pH

(1)

(1)

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

(d) Tin hydroxide wash.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of tin hydroxide washed

Lead

3.347

1.554

Cyanide (total)

2.391

0.956

Fluoride

418.400

237.900

Tin

4.542

2.630

Total suspended solids

179.300

143.400

pH

(1)

(1)

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

(e) Spent electrowinning solution from new scrap.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of cathode tin produced

Lead

4.704

2.184

Cyanide (total)

3.360

1.344

Fluoride

588.000

334.300

Tin

6.384

3.696

Total suspended solids

252.000

201.600

pH

(1)

(1)

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

(f) Spent electrowinning solution from municipal solid waste.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of MSW scrap used as raw material

Lead

0.033

0.015

Cyanide (total)

0.024

0.010

Fluoride

4.165

2.368

Tin

0.045

0.026

Total suspended solids

1.785

1.428

pH

(1)

(1)

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

(g) Tin hydroxide supernatant from scrap.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of tin metal recovered from scrap

Lead

 15.580

 7.233

Cyanide (total)

 11.130

 4.451

Fluoride

1,947.000

1,107.000

Tin

 21.140

 12.240

Total suspended solids

 834.600

 667.700

pH

(1)

(1)

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

(h) Tin hydroxide supernatant from plating solutions and sludges.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges

Lead

 32.20

 14.95

Cyanide (total)

 23.00

 9.20

Fluoride

4,025.00

2,289.00

Tin

 43.70

 25.30

Total suspended solids

1,725.00

1,380.00

pH

(1)

(1)

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

(i) Tin hydroxide filtrate.

NSPS FOR THE SECONDARY TIN SUBCATEGORY

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/kg (pounds per million pounds) of tin metal produced

Lead

7.012

3.256

Cyanide (total)

5.009

2.004

Fluoride

876.500

498.400

Tin

9.517

5.510

Total suspended solids

375.700

300.500

pH

(1)

(1)

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

Previous Part of Code Next Part of Code
Back to Chapter List

Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment § 40.421.294 Standards of performance for new sources - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-sect-40-421-294/

FindLaw Codes may not reflect the most recent version of the law in your jurisdiction. Please verify the status of the code you are researching with the state legislature before relying on it for your legal needs.

Was this helpful?

Welcome to FindLaw's Cases & Codes

A free source of state and federal court opinions, state laws, and the United States Code. For more information about the legal concepts addressed by these cases and statutes, visit FindLaw’s Learn About the Law.

Go to Learn About the Law

Latest Blog Posts

For Legal Professionals

Learn About The Law

Get help with your legal needs

FindLaw’s Learn About the Law features thousands of informational articles to help you understand your options. And if you’re ready to hire an attorney, find one in your area who can help.

Go to Learn About the Law

Need to Find an Attorney?

Search our directory by legal issue

Enter information in one or both fields (Required)

Copied to clipboard