An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Polychlorinated Biphenyls (PCBs)

National Fuel Gas Supply Corporation Approval for Alternative Sampling Procedures for the Characterization of Vertical Natural Gas Pipelines

This approval was granted to the National Fuel Gas Supply Corporation on January 8, 2018, for the use of alternative sampling procedures for the characterization of vertical natural gas pipelines. This approval was issued pursuant to Section 6(e)(1) of the Toxic Substances Control Act (TSCA) of 1976 and the Federal PCB Regulations found at Title 40 of the Code of Federal Regulations in section 761.61(c).

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.