The Cal/OSHA numbers crews get asked about.
Construction: at least 1 toilet per 20 workers of each sex (Title 8 §1526).
1 toilet and 1 hand-washing facility per 20 field workers, within a quarter mile or 5 minutes (§3457).
Toilets must be kept clean, private and supplied with toilet paper.
Plan 1 unit per 10 workers with weekly service so tanks never fill early.
Live answer Monday to Saturday, 7 am to 7 pm. Itemized quotes, weekly service, delivery within about 80 miles of Turlock.