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Posts Tagged ‘Septic System Construction’

Septic System Construction – Do you need an Engineer?

Wednesday, January 6th, 2010

The local Board of Health has approved the plans for your Septic System; you have accepted a bid from a contractor and you are ready to start construction.

Do you need an engineer?

If you are working in Massachusetts, the answer is Yes!

The State Sanitary Code under Section 310CMR15.021 actually defines what your Engineer needs to do during the construction of the Septic System.

Here is a listing of the Tasks that your engineer needs to do.

Task 1 – The engineer needs to observe and confirm the initial excavation of the system area.

Bottom of Excavation

Bottom of Excavation

Task 2 – The engineer needs to observe the construction / installation of the system components (Septic Tank, Distribution Box & Leaching System).

Septic tank installation

Septic tank installation

Task 3 – Prior to the contractor back-filling the system, the engineer needs to take measurements of the constructed system components (location and elevation) to confirm that the components were installed in accordance with the approved plan.

Leaching Chamber System Construction

Leaching Chamber System Construction

Task 4 – The engineer needs perform additional measurements when a system has grading to prevent “break-out” in order to confirm that the grading was constructed properly.

Final grading over Septic System

Final grading over Septic System

Task 5 – The engineer needs to prepare an “as-built” plan for the constructed system and submit the “as-built” plan to the local approving authority (Board of Health for example) along with a form that clearly states that the system has been properly constructed.

During these tasks, the local Health Agent also visits the construction site to make observations of the work progress.

The contractor also has to submit a form stating the construction of the system has been properly completed.

Once all these tasks are done, the local approving authority can issue the Certificate of Compliance.