arboretums, wildlife preserves and similar uses 6. Water and sewage treatment plants 7. Utility substations 8. Power generation facilities 9. Government agency storage and maintenance yards 10. Public parking garages D. Chapter 19.149 - Airport Land
Read it in the chapter →How this ordinance defines it
The operative definition is the local one. Codes routinely subdivide a category into tiers — “day care 2, family”, “group home 2” — and attach different permissions to each, so only Riverside’s own text settles what this covers.