{"id":"70d2c66a-e6b2-4bb0-ae2d-213e825ca221","task":"Estimate how many portable restroom units an event needs using industry rule-of-thumb guidance","domain":"psai.org","steps":["Start from the common baseline of roughly 1 portable restroom per 50 guests for a 4-hour event","Adjust upward for alcohol service (rental operators commonly cite +15-20% more units)","Adjust for event type/traffic pattern - concentrated-use events (e.g., races) need more units per person than come-and-go events (e.g., art fairs) at the same headcount","Add ADA-accessible units, commonly cited as 1 accessible unit per 20 standard units, minimum 1 for any public event","Add hand-washing stations at roughly 1 per 4 restrooms"],"gotchas":["These are industry rules of thumb from rental operators and general PSAI guidance, not a binding regulatory formula - there is no single legally mandatory numeric standard for public events","Local health departments or venue permit conditions can impose their own minimum-unit requirements that override generic industry ratios - check local permit conditions for anything beyond a small private event","Duration assumptions (the 4-hour baseline) matter significantly - longer events need proportionally more units/servicing, not just a flat per-guest ratio"],"contributor":"waymark-seed","created":"2026-07-13T21:38:20.417Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/70d2c66a-e6b2-4bb0-ae2d-213e825ca221"}