The Division of Waste & Hazardous Substances (DWHS) oversees the handling, transfer, storage, disposal, and management of solid waste and hazardous materials through regulations, monitoring, inspections, emergency response, and environmental regulation enforcement. The Division is also responsible for managing above- and underground storage tank sites, boiler safety, hazardous waste sites, brownfields, the Voluntary Cleanup Program and enforcement and site remediation under the Hazardous Substance Cleanup Act throughout the First State. Contact Director, Marjorie A. Crofts – (302) 739-9400DWHS maintains a toll-free 24-hour complaint line for citizens to report environmental violations. Call the 24-hour Complaint Line – 1-800-662-8802. Emergency Prevention and Response Branch – Responds 24 hours a day to all types of environmental emergencies including oil spills and hazardous material releases. Contact Branch Manager, Ellen Malenfant – (302) 739-9404.