What kind of products must meet federal EPA tolerance standards for unintended drift?

Pesticides must meet federal EPA tolerance standards for unintended drift because they are chemical substances that are intended to control pests and can have significant impacts on human health and the environment. The Environmental Protection Agency (EPA) sets these tolerance standards to ensure that pesticide residues do not pose a risk when they drift from their target application area to non-target crops or areas. These standards are critical for ensuring safety and minimizing unintended consequences associated with chemical use in agriculture.

On the other hand, herbicides are a subset of pesticides specifically designed to kill unwanted plants, and while they also have regulatory standards, the broader category of pesticides includes various chemical products, making this answer more encompassing of the regulations that cover unintended drift. Organic fertilizers and soil amendments typically do not fall under the same stringent federal regulations as pesticides, thus making them less relevant in this context.