Department personnel or environmental consultants under contract with the department will conduct an initial site assessment (ISA) and/or Phase I Environmental Assessment (ESA) of the project area to determine the likelihood that hazardous substances or petroleum contamination exist on the property and the extent to which further investigation and/or remediation may be necessary. On transportation projects, hazardous materials may vary from lead paint on bridges to asbestos in structures, or soil contaminated with gasoline from underground storage tanks.

The plans will provide a layout of anticipated areas of contamination within the project limits; the plan sheet(s) will have a list of contractor information notes to be followed while working in the layout area. An onsite qualified inspector will be required to monitor and supervise construction activities in the contaminated area.

Unanticipated hazardous materials encountered during construction must be properly handled and disposed of. Contact the District environmental project manager for procedures to follow.

Cleanup of contaminated materials will be done by properly trained and equipped personnel under a contract work authorization.