 DTSC protects the public health of communities and the environment from toxic substances in current economic use and hazardous waste being generated by present-day industrial and commercial activities through its permitting and regulatory programs to ensure the safe handling, transport, storage and disposal of toxic substances and waste.DTSC protects future generations from the long term stewardship of hazardous substances through pollution prevention business assistance programs, and its new green chemistry mandate - to reduce use of toxic substances in everyday products used by California consumers.Within DTSC's Hazardous Waste Management Program is the Office of Criminal Investigations (or OCI).