How many sampling sites are required on a carcass, and when must sampling occur?

• A. 3 sites (brisket, flank, and rump), at least 12 hours after the carcass enters the cooler
• B. 3 sites (brisket, neck, and rump), at least 4 hours after the carcass enters the cooler
• C. 2 sites (flank and rump) at the final rail before the product enters the cooler but after the zero-tolerance check
• D. As many sites and at whatever location the establishment deems fit

Answer: (A)

Sampling must follow a standardized carcass protocol that uses a fixed set of sites and a defined time after chilling to ensure the results reliably reflect typical carcass surface contamination.

The best answer uses three specific sites spread across the carcass—brisket, flank, and rump—to get a representative snapshot of contamination over different regions, rather than focusing on a single area. Sampling occurs at least 12 hours after the carcass enters the cooler so the surface conditions are stabilized and the results are consistent with how product will be stored and handled, not biased by immediate post-slaughter conditions.

Other options don’t fit standard practice: a different site set is not the prescribed trio; only two sites would reduce representativeness; sampling at the final rail before cooling or after a zero-tolerance check and letting the establishment pick sites would violate the standardized protocol that ensures uniformity and comparability across facilities.