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Professional Installation by Licensed Installers

It takes an expert to handle a septic tank installation. It doesn't matter whether the work is needed for new construction or as a replacement for an old system. You want to feel confident in the equipment, as well as the professionals working on your home.

We have the equipment and expertise needed to trouble-shoot your system and advise you of the necessary repairs. We can replace the baffles in your tank, replace faulty piping, replace your distribution box, replace the septic tank, alter and/or replace the wastewater plumbing in your basement, repair or add-on to your leaching system, install a whole new leaching system, or install a complete new septic system at your home. No job is too large or too small for Onsite.

At Onsite Septic & Portables we know just how important this system is to you and your family. Our work begins with a complete inspection of the area and a personalized plan for your property. Onsite is the only contractor you will need for complete installation, repair, and maintenance of your septic system.

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Septic System Diagram

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What is a septic tank system?

If you are like most people, you know very little about your septic tank system. This is understandable because there have been many myths and misconceptions surrounding septic tank systems and the way they work. Here, we will try to give you a clear understanding of what happens to your household waste after it goes down the drain. Wastewater generated in your household travels outside into the septic system.

The most common type of septic system consists of two parts:

  1. The septic tank
  2. The leaching system

Some more complicated systems may include aerators, pumping stations, dosing chambers, drop boxes, raised fill leaching systems, or other alternate systems.

The Septic Tank

The soil pipe that leaves your house empties first into the septic tank.

The septic tank is a large box that is most commonly made out of precast concrete. Some septic tanks are made of metal or plastic. The size of a residential septic tank depends upon the number of bedrooms in the home and the regulations in the county in which it is installed. Typically, a three bedroom home will have a 1250 gallon septic tank and a four bedroom home will have a 1500 gallon septic tank. Smaller homes and older homes may have a 1000 gallon septic tank, or even a smaller tank. While older tanks consist of a single compartment, newer tanks often have 2 compartments. Some homes have more than one tank.

When household wastes enter the tank, several things occur:

  1. Everything flows into the tank through the inlet baffle and into the middle section of the tank. Here, the bacteria that live in the tank break down the wastes and it separates.
  2. Three layers form in the middle section of the tank. Organic solids form a crusty layer of "scum" at the surface of the tank. Inorganic solids form a layer of "sludge" at the bottom of the tank.
  3. The middle layer is relatively clear liquid called "effluent".

The main purpose of the septic tank is to provide a place for all the solid wastes that leave your house to accumulate. Here the solid wastes can be dealt with by pumping them out of your system. Solids overflowing beyond the tank and into the leaching system should be avoided at all times. Solids overflow from the septic tank when the system is neglected by the home owner, and the tank is not cleaned out frequently enough by your local septic tank pumper. As time passes, solids continually accumulate in the tank. As the scum and sludge layers thicken, the clear water middle layer of effluent eventually gets "squeezed out". As this happens, solids will overflow into the leaching system every time water is run in the house.

The Leaching System

There are several different types of leaching systems. The purpose of the leaching system is to distribute the treated effluent that overflows from the septic tank into the ground. Every time water goes down a household drain, some water (effluent) flows into the leaching system. The most common type of leaching system is a conventional leach field with a distribution box. Other types of leaching systems include raised leach beds, modified raised beds, stone area beds, drywells, and leach fields on drop boxes rather than a distribution box.

When a septic system is designed for an individual home, many factors need to be taken into consideration. Some of these factors include separation distances from the home, wells, neighboring wells, water lines and other utilities, property lines, trees, streams, bodies of water, and ground water. "Percolation test" results reveal how well the soil on the particular site accepts water (different types of soil leach at different rates). "Deep hole test" results reveal the soil conditions on the site and the depth to ground water, seasonal ground water, bedrock, or other barriers to drainage in the soil.

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