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).
The Shelby population density is 501.01 people per square mile, which is much higher than the state average density of 6.84 people per square mile and is much higher than the national average density of 82.73 people per square mile.