California Department of Resources Recycling and Recovery (CalRecycle) 

Closed, Illegal and Abandoned (CIA) Disposal Sites

Perform Intrusive Investigation to Determine Waste Extent and Characteristics

The purpose of an intrusive investigation is to obtain a site characterization. The characterization of the waste will be used to determine what type of landfill can be utilized to dispose of the contaminated soil, i.e., Class I, II or III.

The horizontal and vertical extent of the waste must also be determined in order to delineate the footprint and estimate the volume of contaminated soil. The volume of waste will provide a rough estimate of trucking and "Tipping Fees."

The major components of an intrusive investigation are:

  • Project objectives
  • Sampling plan
  • Documenting and reporting
  • Health and safety plan
  • Hazardous material (HazMat) and unexploded ordinance (UXO) response

Examples of Site Investigation Work Plans

Rural Site Investigation

Formerly Used Defense (FUD) Site Investigation

Urban Site Investigation

A table listing site investigations completed by the CalRecycle is also available. The investigations are listed alphabetically by site name and include: Solid Waste Information System (SWIS) number, type of plan or report produced, investigation type, types of operations, and whether the site is located in a rural or urban setting. The table identifies site investigations during which geophysical survey operations were utilized.

Last updated: March 27, 2008
Closed, Illegal, and Abandoned (CIA) Disposal Sites, http://www.calrecycle.ca.gov/SWFacilities/CIA/
Glenn Young: Glenn.Young@calrecycle.ca.gov (916) 341-6696