Insecticide treatment on nutmeats?

Beware if you love almonds and all sorts of nutmeats.
It is alarming thought that the US FDA and EPA approved the regulation of propylene oxide PO for used as food fumigation for decades. Chances are that nuts such as almonds nutmeats and etc are subjected to the so-called chemical pasteurization using such technique. EPA has classified PO as a probable human carcinogen.
Propylene oxide was once used in racing fuel, but in 1993 the National Hot Rod Association banned its use because of cancer concerns.
And yet this poison is still used to pasteurize foods? EPA and FDA approved!
This is crazy indeed. PO is toxic and dangerous enough to be use as insecticide yet some foods are subjected to such chemical.

http://www.inchem.org/documents/hsg/hsg/hsg015.htm#SectionNumber:2.1http://www.ethicurean.com/2007/08/28/almond-action/