function of a holding tank is to serve as a temporary reservoir for effluent
to a waste water treatment plant. Unlike other types of systems, an absorption
field is not utilized. Collected effluent is pumped from the tank by a Licensed
Waste Hauler into their truck and hauled off. A three-bedroom home, usually
requires a tank five feet in diameter by eighteen feet long. This tank has a
volume of 3000 gallons and is constructed of carbon steel. The size and volume
of the tank depends on the number of bedrooms in the house. An alarm float is
installed in the tank and is connected to a visual and audible alarm inside
the house. The alarm is to let the homeowner know that the tank
needs to be pumped as soon as possible.
In July of 2000, the Wisconsin
Department of Commerce issued a Code requiring that if a holding tank is installed
a water meter must be installed, inside the house, on the incoming water line
along with an outside reader. This meter must be installed by a contractor
with a Master Plumber License, such as Billingsley Engineering.
A holding tank is one of the most
restricted types of systems that can be installed in Wisconsin. The following
criteria must be met:
Holding tanks are generally installed
in sites that are too small for a different type of system, or the water table
in the area is too high to allow for proper treatment of the effluent (wastewater).
Due to the high level of maintenance and frequency of pumping for a holding
tank system, this type of system, in the long run is more work and costs the
homeowner more money then standard POWTS systems..
- The soil and site cannot be
suitable for any other Wisconsin Department of Commerce approved Private
Onsite Wastewater Treatment System (POWTS). (ie. A mound or similar system
must be ruled unsuitable)
- The property must have holding
tank "rights". This can be checked by contacting your local County
Planning and Development Department.
- A holding tank pumping agreement
form needs to be signed indicating that as the homeowner, responsibility
will be taken to have the tank pumped as required (generally every three
to four weeks).
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