Dweller, the asbestos shingles and brake pads are not as dangerous because the asbestos is more contained than in the zonolite insulation. For example the vermiculite was also mixed into concrete and sprayed onto buildings (e.g. world trade center) but is much less dangerous in this form due to the asbestos being suspended in the concrete.
Many thanks to the audiogon moderators for allowing this completely off-topic thread through. The more people that know about this stuff the less hazardous it will be. As the EPA says if you leave it alone it's not likely to be a problem.
Note also that vermiculite currently being sold does not contain this asbestos because it is mined at different sources where asbestos does not contaminate the vermiculite. So all you gardeners just carry on ...
Many thanks to the audiogon moderators for allowing this completely off-topic thread through. The more people that know about this stuff the less hazardous it will be. As the EPA says if you leave it alone it's not likely to be a problem.
Note also that vermiculite currently being sold does not contain this asbestos because it is mined at different sources where asbestos does not contaminate the vermiculite. So all you gardeners just carry on ...