Which of the following can be considered hazardous waste?

The selection of triple-rinsed pesticide containers as hazardous waste is correct because even after rinsing, these containers can still contain residues of harmful chemicals. Pesticides are regulated under various environmental laws due to their potential to contaminate soil and water, and their residues can still pose risks to human health and the environment. Proper disposal is essential to prevent any residual contamination, making it crucial to handle these containers with strict adherence to hazardous waste regulations.

In contrast, compost from untreated plant materials is generally considered safe and beneficial for the environment, as it can enrich the soil without containing harmful substances. Food waste from a kitchen typically falls under organic waste, which can also be composted and is not classified as hazardous. Lastly, diluted household cleaners, while they may contain some chemical components, are usually not concentrated enough to be deemed hazardous waste unless specifically indicated by their safety data sheets.