Chemical waste belongs to the individual who generated it.
Just as the purchase cost of the chemical must be paid by the researcher or end user, the department that ordered the chemical and the cost for disposal of the end generated waste must also come from the researcher, or department. Often, those who order chemicals for research forget associated costs. These include waste disposal cost as part of the complete and necessary budget cycle. Controls will only tighten in the future, and costs associated with waste disposal will only continue to increase. I strongly recommend minimum purchase of chemical to cover only a specific time frame.