Research Article

An Evaluation of Potential Occupational Exposure to Asbestiform Amphiboles near a Former Vermiculite Mine

Table 1

Tree bark sample results—Forest Service land northeast of the former vermiculite mine.

Location Tree SpeciesAmphibole structures/

Alexander Test SiteTamarack36,898
Alexander Test SiteTamarack158,583
Alexander Test SiteTamarack112,336
Rainy Divide Trail 12SPonderosa pine568,137
Rainy Divide Trail 12SDouglas Fir12,356,979
Rainy Divide Trail 12SDouglas Fir15,383,941
Rainy Divide Trail 12SDouglas Fir13,377,926
Bark sample collected in Missoula,Ponderosa pine
MT. Serves as control sample

(a)ND = Nondetect.