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C8 or C-8: PFOA is perfluorooctanoic acid and is sometimes called C8. It is a man-made chemical and does not occur naturally in the environment. The "PFOA" acronym is used to indicate not only perfluorooctanoic acid itself, but also its principal salts.
The PFOA derivative of greatest concern and most wide spread use is the ammonium salt (
Ammonium perfluorooctanoate) commonly known as C8, C-8, or APFO and the chemical of concern in the Class Action suit in Ohio.

Ammonium perfluorooctanoate (APFO or C8)
CAS No. 3825-26-1. Molecular formula:

Perfluorooctanoic acid (PFOA or C8)
CAS No: 335-67-1
. Molecular formula:

The DuPont site where APFO is used as a reaction aid is the Washington Works (Route 892, Washington, West Virginia 26181) located along the Ohio River approximately seven miles southwest of Parkersburg, West Virginia.

The Little Hocking Water Association well field is located in Ohio on the north side of the Ohio River immediately across from the Washington Works facility. Consumers of this drinking water have brought a Class Action suit against the Association and DuPont for the contamination of their drinking water with DuPont's APFO, which residents and media refer to as C8.

PFOA is used as a processing aid in the manufacture of fluoropolymers to produce hundreds of items such as non-stick surfaces on cookware (TEFLON), protective finishes on carpets (SCOTCHGUARD, STAINMASTER), clothing (GORE-TEX), and the weather-resistant barrier sheeting used on homes under the exterior siding (TYVEK).

 


The Columbus Dispatch (Ohio)

November 26, 2004

DuPont didn't disclose reports on teflon risks, officials charge

By Spencer Hunt

Federal officials are again accusing DuPont of illegally withholding information about the possible health risks of a chemical used to make Teflon.

In July, the U.S. Environmental Protection Agency said DuPont should have reported internal studies showing perfluorooctanoic acid, also called PFOA or C8, in Ohio River residents' blood and drinking water.

Because the information dates back 20 years, DuPont faces fines that could exceed $300 million.

This week, EPA attorneys said DuPont completed another study in July but didn't report it.

The accusation appeared in documents filed in an administrative court in Washington.

That could mean more fines for DuPont, which says that C8 isn't a threat and that it has done nothing wrong.

"Should the agency decide to file an additional complaint, we will contest their decision and defend our position," DuPont said in a statement Wednesday.
The EPA stated its case in a request for a stay filed Monday with Administrative Law Judge Barbara Gunning.

"EPA will allege that this new information that DuPont obtained on or about July 29, 2004, but failed to report to EPA, supports a conclusion of a substantial risk of injury to human health," federal attorneys wrote.

A study DuPont funded and received July 29 showed C8 at levels as high as 128 parts per billion in blood samples from 12 residents of Wood County, W.Va., who live near DuPont's Washington Works plant.

The average recorded in people nationwide is 5.6 parts per billion.

DuPont uses C8 to make Teflon coatings for popular household products, including nonstick pots and pans, stain-resistant carpets and water-resistant clothing.
Although it has been linked to liver problems in lab rats, researchers are beginning to examine how C8 affects humans and why it is so pervasive.

Research suggests more than 90 percent of Americans have traces of C8 in their blood. It has been found in Mediterranean dolphins, California sea lions and polar bears.

The central issue in the EPA's case with DuPont is whether the company was legally obligated to report anything.

The EPA argues that a 1981 DuPont study, which showed the chemical in human blood, including that of eight pregnant women and one fetus, should have been reported that year. The EPA's complaint also covers tests from 1991 that showed C8 in drinking water.

DuPont contends that that study and subsequent studies do not show any links to health risks.

The 12 test subjects were plaintiffs in a 2001 lawsuit filed on behalf of thousands of West Virginia and Ohio residents near Washington Works. Their water supplies were contaminated by C8.

Although the study was completed in July, the EPA got the results in September from plaintiff's attorney Robert Bilott. Last week, the Environmental Working Group in Washington sent the EPA a letter urging the agency to consider the new accusation.

The group estimates that DuPont could pay $300 million or more in EPA fines. In September, the company promised to pay as much as $343 million to settle the 2001 class-action lawsuit.

Although the settlement won't be finalized until Feb. 28, DuPont agreed this week to pay $70 million for more blood tests for thousands of residents.

The EPA's case remains on track for a Dec. 16 hearing in Washington.