What is your source for this statement? According to the EPA, "The primary contaminants detected at the site were trichloroethene (TCE); 1,1,1-trichloroethane (1,1,1-TCA); tetrachloroethene (PCE); gallium; and arsenic."
Wikipedia says "The IUPAC name [for trichloroethylene] is trichloroethene." http://en.wikipedia.org/wiki/Trichloroethylene
The TCE that pops up in the article over and over again is 1,1,1-TCE. As pointed out, it is not counted as carcinogin, however it has been linked to birth defects in lab animals.