New version of NF DTU 64.1 on the implementation of non-collective sanitation systems

Focus on the different parts of the standard

• Part 1-1 of the standard proposes "standard" clauses for implementation specifications for raw domestic wastewater treatment systems in residential buildings with up to 20 main rooms. The document concerns traditional systems consisting of structures for collection, transport, primary treatment, and secondary treatment using existing or reconstituted soil.
• Part 1-2 aims to establish general criteria for selecting materials used in the construction of domestic wastewater treatment systems for single-family homes. The document covers pipes, tubes, and connection fittings, system components (septic tanks, lifting stations, etc.), and materials such as sand, gravel, and sanitation aggregates.
• Part 2 proposes special "standard" administrative clauses for contracts for the implementation of on-site sanitation systems. The document specifies the works covered by the contract and those excluded from it, the provisions for coordination with other companies and stakeholders, and finally the provisions for resolving difficulties and disputes.

What changes have been made compared to previous versions?

• Parts 1-1 and 1-2 of the standard, published in 2007, were then experimental standards. Following their revision, their status has changed and they are now approved French standards. Part 2 is a new part, created in the 2013 version.
• Part 1-1 sees terminology changes, the "ventilation" paragraph has been rewritten, and new paragraphs have been added, such as those on "earthworks" and "distribution." The appendix on regulatory texts and all references to regulations have been removed to prevent them from becoming obsolete. The text has been reorganized; for example, the dimensioning elements have been grouped together in a single paragraph.
• In the revised section 1-2, the definitions of aggregates have been improved and the particle size distribution curve in the appendix has been supplemented with a table of values.
  These revisions are the result of work carried out by experts from the AFNOR P16E "Sanitation" standardization committee.