Polytechnic High School – Senate Natural Resources Committee Hearing: Health Problems Potentially Related to Toxic Conditions at LAUSD Schools: Public Hearing Announcement, Agenda, Witness List, Documents, 1999 October 25, id17699, Box: 42, Folder: 10. Tom Hayden Belmont Learning Complex Investigation Collection, URB-BLC. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/91870 Accessed June 10, 2026.