Skip to main content
Find a Lawyer

Code of Federal Regulations Title 40. Protection of Environment § 40.766.27 Congeners and LOQs for which quantitation is required

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

Quantitation at the target LOQ shown for each of the following HDDs/HDFs which may be present in the chemical substances is required for the chemical substances listed under § 766.25. Analysis must take place for either chlorinated or brominated dibenzodioxins or dibenzofurans, whichever is predominantly expected to occur in the chemical substance to be tested. Only chlorinated and brominated congeners need be quantified;  for chemical substances containing predominantly chlorine atoms, only congeners totally chlorinated at the numbered positions need be quantified;  for chemical substances containing predominantly bromine atoms, only congeners totally brominated at the numbered positions need be quantified.

Chlorinated dioxins

Brominated dioxins

LOQ

2,3,7,8-TCDD

2,3,7,8-TBDD

0.1 ppb.

1,2,3,7,8-PeCDD

1,2,3,7,8-PeBDD

0.5 ppb.

1,2,3,4,7.8-HxCDD

1,2,3,4,7,8-HxBDD

2.5 ppb.

1,2,3,6,7,8-HxCDD

1,2,3,6,7,8-HxBDD

2.5 ppb.

1,2,3,7,8,9-HxCDD

1,2,3,7,8,9-HxBDD

2.5 ppb.

1,2,3,4,6,7,8-HpCDD

1,2,3,4,6,7,8-HpBDD

100 ppb.

2,3,7,8-TCDF

2,3,7,8-TBDF

1 ppb.

1,2,3,7,8-PeCDF

1,2,3,7,8-PeBDF

5 ppb.

2,3,4,7,8-PeCDF

2,3,4,7,8-PeBDF

5 ppb.

1,2,3,4,7,8-HxCDF

1,2,3,4,7,8-HxBDF

25 ppb.

1,2,3,6,7,8-HxCDF

1,2,3,6,7,8-HxBDF

25 ppb.

1,2,3,7,8,9-HxCDF

1,2,3,7,8,9-HxBDF

25 ppb.

2,3,4,6,7,8-HxCDF

2,3,4,6,7,8-HxBDF

25 ppb.

1,2,3,4,6,7,8-HpCDF

1,2,3,4,6,7,8-HpBDF

1 ppm.

1,2,3,4,7,8,9-HpCDF

1,2,3,4,7,8,9-HpBDF

1 ppm.
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 § 40.766.27 Congeners and LOQs for which quantitation is required - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-sect-40-766-27/

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