The Food Truck Lunch Rush
A food truck serves lunch from 11:00 a.m. to 2:00 p.m. The cook preps sliced tomatoes, shredded lettuce, and cooked chicken at 9:30 a.m. and places them in shallow pans on the prep counter. By 11:30 a.m., the truck is busy, and the cook has not checked temperatures. The truck has a small refrigerator that reads 38°F (3°C) and a hot-holding unit set at 145°F (63°C). A customer reports that a chicken wrap tasted cool in the middle. The cook says the chicken was cooked to 165°F at 9:00 a.m. and then placed in the refrigerator, but the chicken was pulled out at 10:45 a.m. and has been sitting on the counter since then. The truck has one probe thermometer, and the cook has not calibrated it this week. The truck also has a handwashing sink with soap and paper towels.
1. Evaluate the chicken's time-temperature path and decide whether the wrap can be served.
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The chicken was cooked to 165°F, which is correct for poultry, but the path afterward matters. It was refrigerated, then removed at 10:45 a.m. and held on the counter. By the time the wrap was made, it had been out of refrigeration for at least 45 minutes and possibly longer. That alone is within the 2-hour limit if the chicken stayed below 41°F when removed, but the customer's report that the center was cool suggests the chicken was not reheated to 165°F before service. The cook should not serve the wrap as-is. The chicken should be reheated to 165°F, verified with a calibrated probe thermometer, before it goes into a wrap. If the chicken has been in the danger zone for more than 2 hours total, it should be discarded. The cook should also stop holding the chicken on the counter and keep it either below 41°F or above 135°F.
2. The probe thermometer has not been calibrated this week. How should the cook handle this, and what does it mean for the truck's temperature records?
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An uncalibrated thermometer cannot be trusted to confirm that food reached 165°F or that cold holding is at 41°F or below. The cook should calibrate the probe using an ice-point method: fill a cup with crushed ice and water, stir, insert the probe, and adjust to 32°F (0°C). If the thermometer cannot be adjusted, it should be replaced. Until it is calibrated, any temperature reading is unreliable, so the truck should not rely on it to justify holding food. The cook should also recognize that the truck's temperature records are incomplete because the cook did not check the prepped items at 11:30 a.m. The fix is to calibrate the probe, recheck the cold and hot holding units, and record temperatures at set intervals. If the probe reads incorrectly by several degrees, food that appeared safe may not be, so the cook should err toward discarding questionable items.
3. What handwashing and cross-contamination issues does the setup raise, and how should the cook address them during the rush?
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The truck has a handwashing sink with soap and paper towels, which is good, but the rush creates pressure to skip handwashing. The cook should wash hands before handling ready-to-eat items such as lettuce and tomatoes, after touching raw chicken, after handling money, and after using the restroom. The setup also puts sliced tomatoes, shredded lettuce, and cooked chicken on the same prep counter, which risks cross-contamination if juices from the chicken reach the produce. The cook should use separate cutting boards or clean and sanitize the board between items, keep raw chicken below and away from ready-to-eat food, and use clean utensils. The handwashing sink must not be used to wash produce or utensils. During the rush, the cook should pause to wash hands rather than wipe them on a towel, and should change gloves if gloves are used.