Planning references
Portable Restroom Planning Resources
This hub collects the planning references this site maintains and the official source directory behind every rule cited on the site. Two in-depth resources are published; each section below links directly to the full reference page.
Authority reference · published
OSHA Porta Potty Requirements
Table D-1, the harmful-contaminant washing-facility rule, OSHA's permanent-workplace limitation on §1926.51(f)(3), the mobile-crew exception, sanitary-condition guidance, and the difference between a legal count and a servicing schedule.
Included:
- Eight federal OSHA sanitation standards compared side by side
- Table D-1 source text and printed threshold audit
- Access, servicing, handwashing, ADA, locks, and sex-separation rules
- Verified State Plan differences (California, Washington, Oregon)
- 2026 penalty maximums and 13-claim verification audit
- Downloadable CSV, JSON, and checksum data package
Planning calculator · published
Porta Potty Calculator
A 380-cell comparison of PSAI's event chart and Georgia's regulatory Table 2, verified OSHA construction rules, accessible-unit calculations, and a downloadable 280-row CSV. Includes the only unresolved source conflict in both official tables.
Included:
- Merged PSAI + Georgia event table (26 crowd sizes × 10 durations)
- OSHA Table D-1 and why fixtures differ from rental units
- ADA 5% cluster rule for accessible units
- Handwashing station ratios and Alabama-specific rules
- Downloadable verified CSV (280 rows, v1.0)
Official source directory
Every rule, table, number, and deadline on this site traces to one of the sources below. Each entry lists what the source governs and when it was last checked. If a source page moves or a rule changes, the site’s correction policy applies — see editorial and source standards.
OSHA 29 CFR 1926.51 — Sanitation (construction), incl. Table D-1
OSHA — governs: Construction toilet minimums (Table D-1), the no-sanitary-sewer provision, the mobile-crew exception, the harmful-contaminant washing-facility rule, and OSHA's permanent-workplace limitation on §1926.51(f)(3).
Checked July 27, 2026
OSHA interpretation letter, July 20, 2005
OSHA — governs: Washing facilities required under §1926.51(f)(1) for harmful-contaminant operations; §1926.51(f)(3) applies only to places of employment.
Checked July 27, 2026
OSHA interpretation letter, June 12, 2006
OSHA — governs: Operations that trigger the §1926.51(f)(1) washing-facility requirement and the scope of the mobile-crew exception.
Checked July 27, 2026
OSHA interpretation letter, May 17, 2006
OSHA — governs: Servicing guidance for portable toilets; the origin of the one-per-10-workers figure; the unsanitary-toilet-is-not-provided position.
Checked July 27, 2026
OSHA, 2026 Annual Adjustments to OSHA Civil Penalties, May 21, 2026
OSHA — governs: 2026 civil penalty minimums and maximums.
Checked July 27, 2026
OSHA Field Operations Manual revision, July 14, 2025
OSHA — governs: Penalty size-reduction categories for smaller employers.
Checked July 27, 2026
PSAI unit types and rental-planning materials
Portable Sanitation Association International — governs: Unit-type descriptions, approximate uses before cleaning, and rental-planning guidance (planning guidance, not Alabama law).
Checked July 27, 2026
PSAI Standards for Special Events
Portable Sanitation Association International — governs: Event unit-count planning table and adjustments (planning guidance, not Alabama law).
Checked July 27, 2026
PSAI handwashing planning materials
Portable Sanitation Association International — governs: Handwashing-station-to-unit planning ratios (planning guidance, not Alabama law).
Checked July 27, 2026
PSAI, Renting Portable Restrooms
Portable Sanitation Association International — governs: Placement, access, and rental-process planning guidance.
Checked July 27, 2026
Ala. Admin. Code r. 420-3-1-.29 — portable toilets
Alabama Department of Public Health — governs: Portable toilets must meet ANSI/PSAI Z4.3 or Z4.4 as appropriate; contracted certified permitted pumper; pumping frequency.
Checked July 27, 2026
Ala. Admin. Code r. 420-3-6-.23 — sewage pumping and disposal
Alabama Department of Public Health — governs: Pumper permits, inspected equipment, approved disposal points and methods, and records.
Checked July 27, 2026
Ala. Admin. Code r. 628-X-3-.01 — licensing scope
Alabama Onsite Wastewater Board — governs: Board license requirement for advertising, soliciting, bidding, or performing covered portable-toilet work.
Checked July 27, 2026
Ala. Admin. Code r. 628-X-4-.02 — Portable Toilet License
Alabama Onsite Wastewater Board — governs: Portable Toilet License coverage, calendar-year term, December 31 expiration, and the current fee.
Checked July 27, 2026
Alabama Onsite Wastewater Board public roster
Alabama Onsite Wastewater Board — governs: Public verification of current Portable Toilet License holders.
Checked July 27, 2026
Alabama Department of Revenue rental-tax FAQ and materials
Alabama Department of Revenue — governs: Rental tax as a privilege tax on the lessor; the 4 percent general 'other' rate; gross receipts.
Checked July 27, 2026
Ala. Admin. Code r. 810-6-5-.09.01 — leasing and rental of tangible personal property
Alabama Department of Revenue — governs: Lease-versus-service treatment and what remains part of taxable rental proceeds.
Checked July 27, 2026
City of Huntsville tax materials and currently linked rate chart
City of Huntsville — governs: The 3 percent general rental/leasing rate and delivery-address jurisdiction.
Checked July 27, 2026
City of Huntsville Special Event Permits
City of Huntsville — governs: Special-event permit triggers, posted timing, alcohol licensing window, and the required site plan.
Checked July 27, 2026
City of Huntsville Special Event Guide, August 2022
City of Huntsville — governs: Event site-plan contents, additional restroom and handwashing guidance, and storm-drain protection.
Checked July 27, 2026
2010 ADA Standards for Accessible Design (§§203.2, 206, 213.2)
U.S. Department of Justice / U.S. Access Board — governs: The 5 percent cluster rule, the accessibility-symbol marking, the accessible route, and the construction-personnel exemption.
Checked July 27, 2026
U.S. Access Board toilet-room guidance
U.S. Access Board — governs: Guidance on accessible toilet facilities including portable units.
Checked July 27, 2026
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