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Grease Interceptor Installation Process – Step by Step – Exterior installation

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This project was completed for Superlatinos Café, a local restaurant in Kendall, which received a violation notice from DERM (Department of Environmental Resources Management) due to a cracked grease interceptor tank.
Under current Miami-Dade FOG regulations, once a grease interceptor is structurally compromised, repairs are not permitted, and the system must be fully replaced to meet updated code standards.

When the owner contacted Vasani Consulting, our design-build team immediately stepped in to provide a complete solution — from engineering design and DERM permitting to licensed plumbing and construction work.

The project involved:

  • Designing a new underground grease interceptor system compliant with the latest Florida Administrative Code and DERM standards.
  • Remodeling the kitchen interior, including re-routing the plumbing and gas system to bring them up to current code.
  • Installing missing floor sinks and ensuring proper ventilation per Florida Building Code (FBC) requirements.

After all upgrades and the successful installation of the new grease interceptor system, DERM inspected the site and closed the violation, restoring the restaurant’s full operational compliance

After all upgrades and the successful installation of the new grease interceptor system, DERM inspected the site and closed the violation, restoring the restaurant’s full operational compliance.

Existing Grease Interceptor Demolition

Before installing the new system, the old concrete grease interceptor was demolished and removed from the ground.
This step was required because the previous tank had cracked at the bottom, causing leakage and non-compliance under the latest Miami-Dade Environmental Regulations.

The demolition process included:

  • Pumping and proper disposal of residual grease waste by a licensed hauler.
  • Breaking and removing the old concrete tank using mechanical equipment.
  • Backfilling and compacting the excavation area to establish a stable base for the new installation.

This phase ensured a clean, structurally sound foundation for the new interceptor system and compliance with environmental and safety standards.

Equipment Layout – Installation Preparation

This image shows the underground grease interceptor system during the preparation phase, after excavation and layout verification.

Visible components include:

  • The 4-inch inlet pipe from the kitchen connecting to a cleanout, providing access for maintenance and unclogging.
  • The solids interceptor, installed upstream to capture food debris and prevent blockage in the grease trap.
  • The grease interceptor, designed to separate grease waste from clear water before discharge to the sanitary sewer.
  • The sampling port, installed downstream to allow the Authority Having Jurisdiction (AHJ) to test effluent quality and confirm the system’s performance.

All structures are aligned and installed according to the engineered flow sequence approved by DERM.

Rebar Layout – Reinforcement Stage

This image captures the reinforcement process before concrete placement.
A vapor barrier (plastic sheet) was placed over the compacted subgrade to prevent moisture intrusion, and a steel rebar grid was installed to reinforce the slab.

The access covers for the solids interceptor, grease interceptor, and sampling port are supported and leveled to match the final pavement grade.
This setup ensures proper strength and load distribution once the slab is poured, protecting the interceptor system from surface vehicle traffic.

Concrete Pad – Structural Protection

In this stage, the concrete pad has been freshly poured over the rebar reinforcement.
The concrete encases and secures the system below while leaving the access lids exposed for future cleaning, inspection, and maintenance.

This step guarantees long-term stability and prevents settlement or surface cracking, complying with structural and load-bearing requirements set by local public works agencies.

Final Finish – Marking and Safety

The last photo shows the completed installation with the final pavement markings applied.
The “NO PARKING” stencil clearly designates the area to prevent vehicles from parking directly above the interceptor system, reducing structural stress and ensuring future maintenance accessibility.

The finished surface integrates seamlessly with the existing pavement, providing a clean, safe, and professional appearance that complies with all DERM and FBC requirements.

Why Choose Vasani Consulting?

  • Licensed Professional Engineers, General Contractors, and Plumbers all under one roof.
  • Full design-build delivery — from DERM permit design to installation and final inspection.
  • Expertise in gravity and hydromechanical grease interceptor systems throughout South Florida.
  • Specialists in restaurant compliance with the Florida Administrative Code and County FOG Programs.
  • Proven experience resolving DERM violations quickly and efficiently.

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