Field sample identifier
The field sample identifier, as defined by the United States Environmental Protection Agency via its SEDD Specification Version 5.2, is a "sampler-defined identifier assigned to a sample. This identifier is not assigned by the client." The EPA adds that "this value is often not known to the laboratory. It could be useful as a link into the sampling records system."
- U.S. Environmental Protection Agency (March 2019). "Appendix A. Data Element Dictionary (DED)" (PDF). SEDD Specification Version 5.2. https://www.epa.gov/sites/default/files/2019-05/documents/sedd_spec_v5-2-march_2019_508.pdf. Retrieved 22 September 2022.