FOG / Grease Trap Inspection Logger
Fats-oils-grease program inspections — trap sizing, 25% rule, pumping records, condition and bypass evidence at food establishments; offline.
New grease interceptor inspection
Typical FOG ordinances inspect each food service establishment 1–2×/year, with pump-outs per the 25% rule or fixed 90-day cycles.
Field guide: FOG / Grease Trap Inspection Logger
Half of sanitary sewer blockages trace back to grease, and every blocked main traces back to specific kitchens upstream — which is what a FOG program exists to find before the overflow does. The inspection itself is delightfully concrete: open the interceptor, measure the floating grease cap plus settled solids against the 25% rule, check the baffles and outlet tee exist, and reconcile the pump-out manifests against the dates the device claims.
The practices panel catches the workarounds that keep devices 'clean' while feeding the sewer anyway: enzyme additives that emulsify grease just long enough to pass the trap (banned in most ordinances), hot-water flushing, and the after-hours pour to the storm drain that this log flags at its highest class because it converts a sewer problem into a waterway violation.
Field tips
- Probe through the grease cap with a clear tube or sludge judge — the cap's crust hides how thick it really is.
- Compare the manifest dates to the cap thickness: a 'pumped last month' device at 40% tells you about the hauler or the kitchen, either way a finding.
- Inspect right after the lunch rush when flow is warm and moving — bypassing and emulsification show themselves at the outlet tee.
Records are stored only in this browser (localStorage) — export regularly. This tool aids field documentation; it does not replace your agency's official inspection procedures or engineering judgment.
FOG / Grease Trap Inspection Logger — Fats-oils-grease program inspections — trap sizing, 25% rule, pumping records, condition and bypass evidence at food establishments; offline. Free, offline-first and GPS-aware: open it on any phone, log in seconds, and hand your GIS team clean GeoJSON.
About FOG / Grease Trap Inspection Logger
Half of sanitary sewer blockages trace back to grease, and every blocked main traces back to specific kitchens upstream — which is what a FOG program exists to find before the overflow does. The inspection itself is delightfully concrete: open the interceptor, measure the floating grease cap plus settled solids against the 25% rule, check the baffles and outlet tee exist, and reconcile the pump-out manifests against the dates the device claims.
How to use FOG / Grease Trap Inspection Logger
- 1Enter the establishment / device id and tap 📍 GPS to pin the grease interceptor's exact location (or type coordinates).
- 2Work through the grease interceptor checklist — every field matches what a real inspection program records.
- 3Pick a condition on the Compliant / Pump-out due / Violation — notice / Bypass/illegal discharge ⚠ scale; actionable findings are tallied automatically.
- 4Add notes and log the inspection — it saves instantly to your device, even with zero signal.
- 5Export the round as CSV for your asset system, GeoJSON for the GIS, or print a clean report.
Why use FOG / Grease Trap Inspection Logger?
- ✓100% free, no sign-up — built for crews, not per-seat licences
- ✓Offline-first: records save to your device instantly and survive dead zones
- ✓One-tap GPS tagging with accuracy capture on every record
- ✓Exports CSV for asset systems, GeoJSON for GIS, and print-ready reports
- ✓Checklist and guidance aligned with EPA
Frequently asked questions
What is the 25% rule?+
An interceptor needs pumping when combined floating FOG and settled solids occupy 25% of its wetted depth — past that, retention time collapses and grease passes through. It's measured with a core sampler (sludge judge) at the inlet end. Most ordinances codify it as the pump-out trigger alongside a maximum interval.
Why are enzyme and bacteria additives usually prohibited?+
Emulsifiers don't remove grease — they liquefy it long enough to exit the interceptor, after which it cools and re-solidifies in the public main, often just downstream. Most FOG ordinances ban additives whose effect is to pass grease; finding the drums on site is a standard violation write-up.
What's the difference between a grease trap and an interceptor?+
Size and placement: hydromechanical traps (under-sink, < ~380 L) serve single fixtures and need very frequent cleaning; gravity interceptors (outdoor, 1,900+ L) serve whole kitchens with longer retention. Inspections check the device matches the kitchen's fixture load — an undersized trap on a full dish line can be 'maintained' perfectly and still fail.
What records must establishments keep?+
Typical ordinances require pump-out manifests (date, volume, hauler licence, disposal site) retained 2–3 years and produced on inspection. Manifests are the program's audit trail — gaps, round-number volumes, or unlicensed haulers are findings that lead somewhere every time.
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