On January 4, 2021, the Office of Hearings and Appeals (OHA) denied a Freedom of Information Act (FOIA) appeal filed by Luis R. Comolli (Appellant) from a final determination issued by the Department of Energy's Office of Science-Bay Area Site Office ( BASO). Appellant's FOIA request sought radiation records documenting the radiation dose he was exposed to while operating an instrument (microscope Jeol 3100 with an electron accelerator) during his employment at Lawrence Berkeley National Laboratory (LBNL). BASO referred the case to the University of California (UC-LBNL), the management and operating contractor at LBNL. The Radiological Control Manager and Group Leader of the Radiation Protection Group and his staff at UC-LBNL performed three searches, including two searches of the UC-LBNL radiation monitoring database (database) and one search of UC-LBNL's hard copy files of radiation monitoring records. They searched the database and   hard copy files using Appellant's last name and employee identification number, but found no responsive records. Moreover, the Group Leader provided additional information that radiological monitoring of both the instrument and the room containing the instrument showed  that the levels of radiation were too low to require individual monitoring, which provides support for the absence of individual radiation exposure records for Appellant. Upon review,  OHA determined that the search was reasonably calculated to uncover responsive documents. Therefore, OHA denied Appellant's appeal. OHA Case No. FIA-21-0003