Final answer:
Dry goods should be rejected upon delivery at food premises when they are in dirty and torn packages, as this can indicate contamination or pest exposure.
Step-by-step explanation:
Upon delivery at food premises, dry goods should be rejected when they are in dirty and torn packages. This is because damaged packaging can indicate potential contamination or exposure to pests, which can compromise the safety and quality of the food products. It is essential that all food items delivered to the premises are appropriately labeled and free of pests to ensure they meet safety standards. However, the mere fact that goods are delivered from a new supplier does not constitute a reason to reject them, provided they meet all necessary safety and quality standards.