Eighteen Independent Sampling Organizations
- Allwest Remediation for Dayton Canyon
- Argonne National Laboratory (ANL)
- California Department of Health Services Environmental Management Branch (DHS/EMB)
- California Department of Health Services Radiologic Health Branch (DHS/RHB)
- U.S. Environmental Protection Agency Office of Radiation and Indoor Air (EPA/ORIA)
- Essentia Management Services for L.A. Department of Water and Power
- Foster Wheeler Environmental Corporation for Runkle Canyon
- Groundwater Resources Corporation (GRC). Later became Haley & Aldrich
- Joel Cehn as a consultant to the Brandies-Bardin Institute
- Kleinfelder Corporation for Ahmanson Ranch Development
- Lawrence Livermore National Laboratory (LLNL) for the Rocketdyne Recreation Center
- McLaren - Hart Environmental Engineering Corporation for the Brandeis-Bardin and Santa Monica Mountains Conservancy
- Miller Brooks Environmental Incorporated for Runkle Canyon
- Oak Ridge Associated Universities (ORAU)
- Oak Ridge Institute of Science and Education (ORISE ) for radiological release verification sampling
- Ogden Environmental and Energy Services for Bell Canyon
- QST Environmental Incorporate for Runkle Canyon
- Regional Water Quality Control Board (RWQCB)
