29 CFR 1926.51 in plain English.
At least 1 toilet.
1 seat + 1 urinal per 40 workers.
1 seat + 1 urinal per 50 workers.
1 unit per 10 workers with weekly service keeps it usable.
Call (956) 224-1449, Mon–Sat, 7 a.m.–7 p.m.