Septic Tank and Holding Tanks
- Must conform to the requirements of Canada Standards Association Standard B66 and must be marked to indicate conformance with CSA B66
- Prefabricated tanks must be installed according to manufacturer’s specifications. Ex. a tank must be installer not deeper than the depth specified by the manufacturer
- The tank must not be installed in an area where vehicles can drive over the top of the tank
- Article 18.104.22.168. specifies that distribution pipes for leaching beds must be not less than 3-inch trade size for gravity flow systems and 1-inch trade size for pressurized systems. The pipe most commonly used for gravity flow systems is either a 3-inch or 4-inch trade size PVC pipe, perforated at the 4,6, and 8 o’clock positions
- The pipe should have an indicator strip in the 12 o’clock position to permit the alignment of all pipes and ensure perforations and positioned correctly
- Pipes and fittings for pressurized systems must be strong enough to withstand pressure
- Fittings are potential sources of failure, it is advisable to use as few as possible
- Septic stone must be washed and free of fine material
- Fines should be less than 1% of total mass of the product
- Stone layer should be covered with geo-textile to ensure pore spaces are not plugged
- For a raised leaching bed, fill material should be uniformly graded, fine-to-medium sand with T-time ranging between 5 and 15 min/cm.
- Uniformly graded soil is ideal because it does not compact over time whereas well graded soil will
- Fill material with a T-time greater than 20 min/cm is not recommended for raised leaching beds and mantles, and can be difficult to install.