What defines a "Tier 2" Closed Mixing System?

A "Tier 2" Closed Mixing System is defined by its use in scenarios that present a higher potential risk to users handling pesticides. Specifically, this classification pertains to situations where mixing and loading is conducted with liquid products that carry a label warning of potential fatality if absorbed through the skin. This label indicates the high level of toxicity these products possess, warranting stringent safety measures during handling.

The need for a "Tier 2" system arises from the increased dangers associated with such highly toxic substances. Using a closed system helps to minimize the likelihood of exposure to harmful pesticides, protecting the handler from the risks associated with skin absorption and other hazards. Thus, a "Tier 2" system must be designed with advanced safety features to prevent leaks, spills, or any contact with the hazardous materials being mixed.

Other options do not reflect the proper criteria for classifying a "Tier 2" system. For instance, using gas mixtures with no hazard labels does not pertain to toxicity or mixing enforcement and would not necessitate a closed system. Similarly, including all adjuvants with high toxicity overlooks the specific concern about liquid products labeled for extreme skin hazard. Lastly, mixing solid pesticides exclusively lacks relevance to the "Tier 2" classification, as