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Holding Tanks

Holding tank

Standard BNQ 3682-901
Prefabricated Sewage Holding Tanks for Residential Use – Dimensional and Physical Characteristics

Waste water treatment relies on structures designed to be solid, effective and safe. For that reason, the BNQ has developed a series of standards governing septic tanks, holding tanks and absorbing wells. In particular, standard BNQ 3682-901 specifies the dimensional and physical characteristics of prefabricated holding tanks for residential use in concrete, fiber-glass reinforced polyester or polyethylene. It applies to prefabricated holding tanks intended for underground installation to store water from low-flow or chemical toilets and household waste water from detached dwellings.

  • Download standard (French only)
    7985 FRN BNQ 3682-901 Fosses de rétention préfabriquées pour usage résidentiel - Caractéristiques dimensionnelles et physiques
    Il s'agit d'une reconduction (confirmation) du texte de l'édition du 8 octobre 2008.
    REVISION IN PROGRESS (expected date for the new edition: March 2026)

  • Standards committee members
    Number of committee members : 13
    Yves BeaulieuConsumaj inc. (représentant de l'AIMQ)
    Marie-Christine BélangerPremier Tech Water and Environment
    Marie-Claude BergeronMDDELCC - Direction générale des politiques de l'eau - Direction des eaux municipales
    Normand BoyerLes Blocs Normand inc.
    Jacques GagnéJacques Gagné experts-conseils inc.
    Francis GaudetMRC de D'Autray - Représentant COMBEQ
    Daniel GélinasXactics (2001) International inc.
    Claude GillesRéseau environnement
    Hélène LapointeOrdre des ingénieurs du Québec - Major & associés
    Marc OtisTubécon / Béton provincial ltée
    David RoySociété d'habitation du Québec
    Daniel St-PierreMEI Assainissement
    Christian VézinaNORDIKeau

 

Certification Offer

Marque de certification - Fosses de rétentionFor a structure manufacturer conducting business in Québec, BNQ certification is an excellent calling card. The BNQ has therefore established a certification program to certify waste water treatment structures based on four documents, including the BNQ 3682-925 protocol. This protocol establishes the procedural rules and marking requirements applicable to the certification of prefabricated septic tanks to the requirements of BNQ 3680-905, prefabricated holding tanks to the requirements of BNQ 3682-901 and prefabricated structures for absorbing wells to the requirements of BNQ 3682-850.

This certification program is accredited by the Standards Council of Canada.