Civil Engineering Services

Soil Testing for Septic Systems

Septic soil testing explained and completed for people who need a county-ready answer—not a maze of unfamiliar testing terms.

Service overview

What this service involves

Homeowners and contractors are often told to obtain a “soil test” before a septic permit can move forward. Depending on the jurisdiction and parcel, that may mean percolation testing, soil profile observations, test pits or borings, documentation of limiting layers or groundwater indicators, and a proposed primary and reserve disposal area.

Calicore starts with the project location, proposed bedroom count or design flow, preliminary building layout, wells, access, slopes, and the reviewing agency’s requirements. The field scope is then planned around a realistic septic layout so the results can support design and permitting.

Step by step

How the process works

The exact scope is matched to the project, but a typical assignment follows these steps.

  1. 01

    Review the exact request

    We ask for the county message, correction letter, application checklist, or other instruction so the field scope answers the actual requirement.

  2. 02

    Identify the required soil work

    Depending on the jurisdiction, this may include a perc test, soil profile, test pit or boring, limiting-layer observations, groundwater indicators, or more than one of these.

  3. 03

    Plan around a workable layout

    Test locations are selected with the proposed home, wells, driveways, slopes, property constraints, primary area, and reserve area in mind.

  4. 04

    Complete the field work and report

    Methods, locations, soil observations, measurements, limitations, and the information needed for the next design step are documented.

Review criteria

What the county means when it asks for a soil test

The phrase “soil test” is not one universal service. The reviewer may be asking for infiltration data, a soil profile, separation from a limiting layer, or a full package that supports septic design.

Requirements vary by city, county, special district, parcel, and project type. Calicore confirms the current requirements with the reviewing agency before finalizing the scope.

What you receive

Typical project deliverables

  • County-requirement and records review
  • Perc testing and soil-profile documentation as required
  • Site constraints and test-location plan
  • PE-prepared septic soil report within the accepted scope

Common project needs

When this service is useful

  • DIY homeowners and owner-builders
  • Contractors coordinating a residential permit
  • Vacant-lot feasibility
  • Barndominiums, small homes, and ADUs

Frequently asked

Soil Testing for Septic Systems questions

Is a soil test the same thing as a perc test?+

Not always. A perc test measures infiltration at selected depths. The agency may also require soil profiles, groundwater or limiting-layer observations, setbacks, and a complete septic layout. Calicore checks the local requirement before testing.

Can Calicore tell me where the septic field should go?+

Yes. Test locations should represent a feasible primary and reserve disposal area after considering the proposed home, wells, property constraints, slopes, access, and required setbacks.

Can my contractor dig the test pits?+

Often, but only after the required locations, dimensions, access, safety, and agency procedures are confirmed. Do not excavate in advance without coordinating the testing plan.

Request a proposal

What to send us to begin

Send a short description of the work, any plans, specifications, or photographs you have, and tell us what you need the service to provide. Include a project location if it applies.

Request a proposal