Which of the following is NOT one of the handler employee training requirements?

The requirement regarding handler employee training focuses on ensuring that individuals who work with or around pesticides are well-informed about the potential hazards, safe handling practices, and how to respond in emergencies. "Identification of potential pesticide hazards," "Use of personal protective equipment," and "Emergency response procedures for pesticide spills" are all crucial elements of this training.

These components are designed to enhance safety and mitigate risks associated with pesticide handling. Employees need to understand the specific dangers posed by the chemicals they are using, how to protect themselves appropriately, and the steps to take in the event of a spill, as these directly relate to their health and safety while performing their jobs.

On the other hand, while knowing the location of pesticide purchase receipts may be important for record-keeping and compliance purposes, it does not contribute directly to ensuring the safe handling practices or emergency preparedness of handlers. As such, it is not included in the essential training requirements for handler employees. This distinction highlights the focus of training on immediate safety and health concerns rather than administrative details.