Septic Tanks: What is a Soil Test and How Much Do They Cost?

Whether you are replacing an old septic system or building a new one, the first phase of your project is always a soil test. Also known as a “soil study” or a “site characterization study,” this process evaluates how well your land can treat wastewater while protecting the environment. The data from this test determines which septic options are possible for your specific property.

Here is what you need to know about the steps involved, the types of tests performed, and the costs you should plan for.

1. Choosing a Qualified Professional

Your first step is to hire a qualified professional—usually a technologist, engineer, or geologist. These specialists hold expertise recognized by their respective professional orders. Their training allows them to accurately evaluate soil characteristics and design a septic system that is perfectly suited to your property.

2. Performing the Soil Tests

The professional you hire will analyze your ground using different methods based on their equipment and experience. These tests aim to identify soil properties, specifically the ground’s ability to absorb and treat wastewater. Here are two common procedures used to study these elements:

• Percolation Test: This test involves digging one or more holes on the property, either by hand or with an excavator. These holes are filled with water to measure how long it takes for the liquid to soak into the ground. The result reveals the soil’s absorption capacity and determines its drainage speed.

• Sieve Analysis (Granulometric Analysis): This study involves taking soil samples at different depths to identify its composition. This data allows the expert to recognize the soil type and predict whether it can naturally treat wastewater.

3. Analysis of Results and Issuing a Report

The collected data is carefully analyzed, and the findings are presented in a report containing all essential information. This document also includes specific recommendations to guide the homeowner in choosing the ideal system for their situation. This detailed file will then serve as the required supporting document for the building permit application, which is mandatory before any work can begin.

The average wait time to receive this assessment varies depending on the firms and laboratories involved. Generally, you should expect to wait four to eight weeks, or sometimes longer.

At Soluo, we typically provide a complete report within four weeks. We even offer an expedited option to deliver it within 10 business days for an additional fee.

What is the price of a soil test for a septic tank or new construction?

The price of a soil test depends on several factors: the number of samples required, the location of the property, the complexity of the site, and the firm you hire. On average, the cost of a soil test for a septic system ranges between $1,250 and $1,500.

This rate covers:

• The on-site visit and needs analysis.

• The actual soil tests, including the percolation test and sieve analysis (which measures the soil’s absorption capacity).

• The drafting of a complete report.

This final report also includes the construction plans for your future septic installation.

In Short

Since the type of soil determines which systems can be built on a property, these tests are essential for estimating the total cost of your septic installation. It is a crucial step in understanding the specific characteristics of your land. By knowing the steps, costs, and timelines involved, you can effectively manage your budget, your schedule, and your project as a whole.

Don’t hesitate to contact us to schedule the soil tests for your future installation. Soluo also offers a turnkey experience, supporting you through every step of your project—from the initial tests to the completion of the work.