Solano County, California. Solano County is a county located in the U.S. state of California. As of the 2010 census, the population was 413,344. The county seat is Fairfield. Solano County comprises the Vallejo-Fairfield, CA Metropolitan Statistical Area, which is also included in the San Jose-San Francisco-Oakland, CA Combined Statistical Area.
Potentially hazardous food, such as cooked hamburger, should be left at room temperature for no more than 2 hours or one hour if the ambient temperature is very warm. At that point, the food should be refrigerated or reheated. Was this answer useful?
Answer by gordon (304). According to current USDA food safety standards the maximum safe time for cooked foods that are left out at room temperatures is two hours. The  Danger Zone  is 40F to 140F when bacteria can double in as few as 20 minutes. If your room temperature is 90F food should not be left out more than one hour. add a comment.