This sub-series consists of files on district issues and organizations, including city and county services, local businesses and organizations, the Ontario International Airport, military bases, the Santa Ana Watershed, the Stringfellow Acid Pits, and development projects. Materials in the sub-series include correspondence, programs, memorandums, articles, reports, background research, and notes.

This sub-series consists of files on district issues and organizations, including city and county services, local businesses and organizations, the Ontario International Airport, military bases, the Santa Ana Watershed, the Stringfellow Acid Pits, and development projects. Materials in the sub-series include correspondence, programs, memorandums, articles, reports, background research, and notes.