Hazardous Materials (HazMat)

The Idaho Transportation Department must conduct hazardous materials investigations for any property ITD owns, manages, plans to sell, or plans to purchase. If hazardous materials are found to be present on ITD property, federal and state environmental laws requires ITD to cleanup and properly dispose of all hazardous materials regardless of whether the original source is from ITD activities, from a tenant, or inherited when property is acquired.

ITD seeks to identify hazardous materials early in the project development process through thorough investigations to reduce liability and to minimize delays. Advantages to this identification process include:

  1. Minimizing potential dangers to ITD and other personnel
  2. Protecting the environment from exposure to or spread of hazardous materials
  3. Minimize design and construction costs due to potential project delay or termination
  4. Reduce adverse publicity

Storage Tank - I-84 Connector Project

Abandoned Drums - Nampa, ID

HazMat Investigations are conducted in the following steps:

Administrative Review – (Required on all projects – ITD 652 Form)

  1. Published lists are reviewed to determine if there are any documented HazMat sites, underground storage tanks or contaminated ground water in/near the project area
  2. A windshield survey and interviews are performed
  3. Selected resource agencies are contacted
  4. If there is a potential impact, a Phase I or Phase 2 must be completed

Initial Site Assessment – (Phase I)

  1. Determines whether there is a potential HazMat risk
  2. Complete a Records Review of maps and historic documents to obtain information to help identify hazardous environmental conditions
  3. Perform a Site Reconnaissance to inspect property and any structures on the project for recognized hazardous environmental conditions
  4. Conduct Interviews with property owners or site managers to obtain information about possible hazardous environmental conditions that confirms information previously obtained or identifies new information

Preliminary Site Investigation – (Phase II)

  1. Confirm whether HazMat is present and extent of contamination
  2. Soil and water samples taken and analyzed
  3. Reports written to discuss physical environment and its relationship to potential contamination, sampling techniques, analysis results, health and safety considerations, identification of any contamination if found, conclusions, and remediation strategy and costs

Detailed Site Investigation – (Phase III)

  1. Conducted when existence of HazMat on the project site is confirmed
  2. Includes the Site Investigation, Remedial Action Plan and remediation
  3. Approximate clean up time can vary from 6 months to several years
  4. Authorization of a Phase III investigation will be coordinated through the Headquarters Environmental Section Manager

Additional information can be found under “1400 Hazardous Materials” in the ITD Environmental Process Manual

Tank Oil Spill - North of Smith Ferry, ID