The Design Process for Sewage Disposal Systems

Posted by Hogan Land Services on Aug 6, 2018 10:00:00 AM

today we explain what you should know about sewer system designAt Hogan Land Services, we help homeowners and business owners manage their wastewater disposal needs by offering planning and design services for septic systems. Our systems are safe and compliant with relevant regulations, and we can handle projects for a range of different clients, from residential homeowners to commercial businesses, all the way to vineyards. This article will offer a brief look at what you can expect from the sewage disposal design process with Hogan Land Services.

The Testing of the Site

The first step with any sewage disposal system is to make sure the site is suitable for safe disposal of wastewater. Depending on soil quality, water table height, and a variety of other factors, the land at the project site may not be appropriate for a traditional septic system. At Hogan Land Services, we offer a range of different tests designed to determine which system best suits the needs of your project.

Tests typically include:

  • Site Evaluation: Also known as a Soil Profile Evaluation, this type of analysis consists of a site review to determine a suitable location for sewage disposal. This test includes a “profile pit” evaluation, which reviews the soil depth and texture to establish cost-effective system types.
  • Wet-Weather Groundwater Monitoring: Hogan Land Services will install groundwater monitoring wells at the site to observe groundwater depth during the rainy season. Monitoring groundwater levels when precipitation is at its highest helps our planners ensure there is adequate treatment of wastewater to avoid contaminating the groundwater.
  • Percolation Test: We test the percolation (or “perc”) capacity of the soil in the proposed sewage disposal area to ascertain the rate at which the soil accepts wastewater. This rate is then used to design the system, particularly regarding how large it needs to be.

These tests are an essential part of the initial design process to make sure that the project site is an adequate location for a sewage disposal system. If the tests indicate favorable findings, that is an excellent sign that the site can handle wastewater without posing a threat to the environment. If the results are not satisfactory, or do not meet current regulations, an alternate location will be required for the system.

The Septic System Design Package

Once Hogan Land Services has completed the testing process, we will get to work preparing a septic system design package. This package will be primarily based on the test results and will include:

  • A site plan, indicating locations of both existing and proposed structures
  • Detailed plans for the design and layout of the sewage disposal system
  • Flow and sizing calculations
  • Specs for the new system components
  • A variety of other details

We guarantee that our septic system design package will be ready to be submitted for approval, per county guidelines. Do note that rough floor plans of other proposed developments—such as houses or other buildings, must be presented alongside the sewage disposal system design package.

Improving or Repairing an Existing Sewage Disposal System

As mentioned previously, one of the preparation tests we offer at Hogan Land Services is meant for testing and monitoring the performance of existing systems. These tests are part of the services we provide for existing sewage disposal systems. We are also qualified to design improvements or repairs for existing systems. Improvements or repairs may be necessary due to required upgrades or because they are no longer adequate for wastewater treatment and disposal.

If there are existing sewage disposal system components at the project site, such as a septic tank or a dosing tank—we can uncover them and test them to evaluate their performance. This kind of test usually involves surge dosing the system by adding water to it and then monitoring performance for a brief period. We will then summarize the state of the system in a detailed report.

After we test your existing system, we will schedule a site meeting with the appropriate city or county agency for your property. Once given the go-ahead to move forward with your project, we will prepare a Repair Design. The repair plan will include specification, details, and layouts of the proposed system improvements. Rough floorplans of the structures to be serviced, provided by you or your architect will be included in the submittal package.  

As with a full system installation, repair, or upgrade, a design from Hogan Land Services will be considered complete once we transmit the Repair Design package to you. However, our services will include one round of minor editorial plan changes or comment resolutions. You may also request for us to handle the permit submission to the appropriate agency. Upon authorization we will submit and track your permit throughout the approval process until we have received your issued permit. From the point of issuance, you will be able to begin construction of your new system or perform repairs to the existing system.

Have additional questions about septic system design? Check out our online guide for everything you need to know about septic systems.