An environmental consulting company has threatened to sue the leader of the Green Party of Canada over comments she made about the company's work regarding herbicides at CFB Gagetown.

Last month, Elizabeth May was publicly critical of Cantox Environmental Ltd., which has carried out several studies on whether Agent Orange and other herbicides created health risks for people at Base Gagetown.

Her criticism of the company was made in a speech in Halifax, and repeated in an interview with CBC Radio.

"This particular firm, Cantox, does have a reputation for having done health risk assessments in a number of places and on a number of substances and generally concluding there isn't a problem," May said in June.

Elliot Sigal, a vice-president at Cantox, responded to May's comments in his own interview with CBC Radio Tuesday.

"We have asked Ms. May for a retraction due to the factual errors and untrue statements and very misleading information in her statements," said Sigal, a vice-president at Cantox.

In most of the cases Cantox, which recently renamed itself Intrinsik, studied at Gagetown, the conclusion was that the chemical herbicides posed no health risks.

Sigal said the company has recommended several sites it has studied over the years be cleaned up.

He says if May does not retract her comments, the company might sue.

A spokesperson for May says she hasn't made a decision on that yet.