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What to Expect During a Grease Trap Inspection

9 Mar 2026 · Updated 3 min read No comments FOG Compliance
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Prepared by GreaseTrapLocator · Fact review: August 8, 2026

In plain English: Inspection procedures differ. Prepare the records and safe access the issuing authority requires, and let the actual notice—not a national penalty table—control your response.

Who may inspect

Depending on the jurisdiction and issue, the inspector may represent a sewer or pretreatment program, public health, plumbing/building enforcement, or another authorized body. The inspection notice, permit, and local program identify the scope and authority.

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Build the inspection packet

  • Permit, registration, approved plan, and revisions.
  • Exact device make/model and current manufacturer manual.
  • Maintenance and inspection log.
  • Service reports, invoices, and required waste/disposal documents.
  • Defect, repair, alarm, and corrective-action records.
  • Previous notices, deadlines, communications, and proof of completion.
  • Facility manager and local-program contact information.

Prepare safe access

Clear ordinary storage and access obstructions, identify the device, and keep the responsible manager available. Do not open, enter, or lean into equipment for a generic inspection checklist. Follow the inspector's authority, the manufacturer instructions, and the site safety process.

If the inspector issues a notice

Read the exact finding, cited rule, required correction, deadline, appeal or review process, and reinspection direction. Assign one person to the response, preserve all communications, and submit only accurate evidence. Do not rely on generic national fine ranges or assumed grace periods.

Official sources used

Seattle Public Utilities

Seattle uses a 25 percent trigger when manufacturer specifications are unavailable, prohibits emulsifying agents/enzymes/bio-additives, supplies local self-cleaning guidance, and directs a business with a backup into the premises to close and contact public health.

Scope: Seattle local example only

Fats, Oils, & Grease: Commercial Kitchens · reviewed August 8, 2026

Connecticut Department of Energy and Environmental Protection (DEEP)

The cited permit uses 25 percent of operating depth or three months, whichever is more frequent, requires specified records for five years, and prohibits intentionally using hot water, steam, chemicals, or biological additives to release FOG.

Scope: Connecticut permit example; not a national rule

General Permit for the Discharge of Wastewater Associated with Food Establishments (effective October 5, 2025) · reviewed October 16, 2026

U.S. Occupational Safety and Health Administration

Smell is not a reliable warning. Evaluate hydrogen-sulfide and confined-space hazards and apply the monitoring, training, entry controls and respiratory protection required by the applicable standards and site assessment.

Scope: U.S. workplace safety guidance and standards

Hydrogen Sulfide: Evaluating and Controlling Exposure · reviewed August 8, 2026

Frequently asked questions

How often will our grease trap be inspected?

The frequency and trigger depend on the local program, permit, complaint, project, and enforcement history.

What records should we have ready?

Prepare the locally required permit or plan, device manual, maintenance log, service reports, required disposal records, repairs, notices, and corrective actions.

Are enzymes usually acceptable?

Do not assume so. Some local programs prohibit enzymes and bio-additives. Check the controlling rule before use.

What should we do after a notice?

Follow the cited rule, correction, deadline, and response process in the actual notice, and keep evidence of completion.

Grease Trap Locator Editorial Team
Author: Grease Trap Locator Editorial Team

The Grease Trap Locator editorial team covers FOG compliance, grease trap maintenance, and commercial kitchen regulations across the US and Canada. Our guides are written for restaurant owners, facility managers, and food service operators who need practical, accurate information without the fluff.

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