The Septic Tank :  Where Treatment Begins

The Septic Tank : Where Treatment Begins

Every system begins with a tank.  Baseline uses high quality, 20-year warranty concrete tanks from reputable Alberta suppliers.  The type and size of tank for each system is determined by a number of factors. 

After entering the first, or working compartment, the wastewater separates into scum (floating layer), sludge (bottom layer), and effluent (clarified middle layer).  The effluent (primary treated effluent) then enters the second chamber where it is pumped or gravity fed to the treatment area.  Advanced Treatments Units (ATUs) further treat the effluent by means of textiles or aeration, producing secondary treated effluent.  All septic tanks need to be pumped out every few years, depending on size and usage.

At-Grade Systems

At-Grade Systems

An at-grade system treats effluent very efficiently and always starts with an Advanced Treatment Unit.  They are constructed on top of  the existing leafy layer and are well integrated into a treed area.


Treatment Mounds

Treatment Mounds

Treatments mounds are generally used where there is more shallow favorable soil.  A layer of sand further treats the effluent before it is dispersed into the soil.  Mounds treat wastewater effectively, have accessible components, and can be aesthetically integrated into the landscaping.  Mounds can use pipe-in-stone or chamber systems to distribute the effluent.  The footprint of a treatment mound can be half that of a field.

Holding Tanks

Holding Tanks

Some municipalities specify that holding tanks must be installed.  This may be on smaller subdivision lots, ones with seasonal usage, or near bodies of water.  A holding tank does not use soil for treatment and needs to be pumped out regularly by a vacuum truck.  An alarm indicates when the level of effluent is too high.

Drainfields

Drainfields

Drainfields are buried underground.  Effluent is treated by the soil, which must have favorable conditions for at least 5 feet below the bottom of the trenches.  Our excavation method preserves the topsoil whenever possible.

Open Discharge

Open Discharge

Wastewater is piped from the septic tank onto an open area of the property.  There are numerous regulations for open discharge systems, including separation distances and subdivision restrictions.