1 The human PBPK model predictions and experimental data indicate that exposure to ternary mixtures of. approximately 20 ppm each of toluene, ethylbenzene, and xylene will not result in significant increases in. blood levels of these chemicals compared to individual chemical exposure (Haddad et al. 1999b; Tardif. et al.
Shelby, MT. Sponsored Topics. Shelby is a city in and the county seat of Toole County, Montana, United States. The population was 3,216 at the 2000 census. Shelby is located at 48Â°30â²26â³N 111Â°51â²37â³W / 48.50722Â°N 111.86028Â°W / 48.50722; -111.86028 (48.507270, -111.860218).
Population Projections â The current population estimate for Shelby County as a whole. is 869,379. Based on projections compiled by the MPO, the University of Tennessee and. the municipalities of Shelby County, the Shelby County Coordinating Committee. adopted a 20 year population estimate of 1,106,570.