This is the sixth edition of CSA B66, Design, material, and manufacturing requirements for prefabricated septic tanks and sewage holding tanks.
It supersedes the previous editions published in 2000, 1990, 1985, 1979, and 1975 under the title Prefabricated Septic Tanks and Sewage Holding Tanks.
This Standard specifies minimum design and material requirements as well as manufacturing practices and markings for prefabricated septic tanks, sewage holding tanks, and effluent chambers of steel, concrete, fibreglass-reinforced plastic, or polyethylene construction that are designed to handle sewage or sewage effluent.
This Standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of any regulatory limitations before use.
Annex A illustrates typical layouts for septic tanks. However, the figures in Annex A are not intended to suggest materials, methods, or design criteria.
This Standard does not apply to sewage holding tanks used in recreational vehicles. These are covered in CAN/CSA-B45.6.
In CSA Standards, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.