South Gate – Environmental Assessment on Proposed South Gate School Site, Final Report (Subsurface Investigations Report), 1989 June 12, id17713, Box: 42, Folder: 24. Tom Hayden Belmont Learning Complex Investigation Collection, URB-BLC. Special Collections & Archives. https://findingaids.csun.edu/repositories/2/archival_objects/91884 Accessed June 11, 2026.