Environmental Service Contracts

When known or potential contamination/waste issues are present on a project, the District may contact ENV to access standing environmental service contracts. ENV maintains statewide environmental consulting, engineering, and remediation contracts to assist with various hazardous materials issues. Alternately, when available and appropriate, districts may use their own environmental service contracts to address hazardous materials. Qualified environmental consultants and contractors can provide broad support, including:
  • Performing environmental investigations to identify chemicals of concern, delineate the vertical and horizontal extent of soil and groundwater contamination, determine groundwater properties, and identify the potential for vapor intrusion.
  • Assessing the potential for public/worker health and safety concerns.
  • Determining handling and disposal requirements for any contaminated oil, groundwater, or waste unearthed during construction.
  • Recommending preventive actions to avoid or minimize Department liability by preventing the spreading/exacerbating of contamination, and minimizing project delays
  • Developing soil and groundwater management plans and/or special specifications as needed to mitigate contamination and waste concerns.
  • Removal of Underground Storage Tanks (USTs), waste, contaminated soil or water, and abandoned pipelines that are in conflict with project activities.
Reference
ENV's Hazardous Materials in Project Development Manual
, available as part of the
Hazardous Materials Toolkit
, for additional information regarding Department procedures for handling hazardous materials during advanced planning, right-of-way acquisition, design, and construction.
The following sections describe common hazardous materials contamination and waste scenarios that might be occur before and during a construction project.