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).
Shelby County is a county located in the far eastern portion of the U.S. state of Texas. As of the 2010 census, its population was 25,448. Its county seat is Center. The county was created in 1835 as a municipality of Mexico and organized as a county in 1837.