NSF 40-2013

http://www.pdfengineers.org/164037-nsf-40-2013-.html

NSF/ANSI Standardfor Wastewater Treatment Systems Residential wastewatertreatment systems1 General1.1 PurposeThe purpose of this Standard is to establish minimum materials, design and construction, and performancerequirements for residential wastewater treatment systems. This standard also specifies the minimumliterature that manufacturers shall supply to authorized representatives and owners as well as the minimumservice-related obligations that manufacturers shall extend to owners.1.2 ScopeThis Standard contains minimum requirements for residential wastewater treatment systems having ratedtreatment capacities between 1514 L/day (400 gal/day) and 5678 L/day (1500 gal/day). Management methodsfor the treated effluent discharged from residential wastewater treatment systems are not addressed by thisStandard.System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with therequirements therein. This Standard shall in no way restrict new system designs, provided such designs meetthe minimum specifications described herein.1.3 Alternate materials, design, and constructionWhile specific materials, designs, and constructions may be stipulated in this Standard, systems thatincorporate alternate materials, designs, or constructions may be acceptable when it is verified that suchsystems meet the applicable requirements.1.4 Performance classificationFor the purpose of this Standard, systems are classified according to the chemical, biological, and physicalcharacteristics of their effluents as determined by the performance testing and evaluations described herein.All systems within a manufacturer's model series may be classified according to the performance testing andevaluation of the system with the smallest hydraulic capacity within the series. Performance testing andevaluation of larger systems within the series (having hydraulic treatment capacities within the scope of thisStandard) may not be necessary provided that the dimensions, hydraulics, mixing and filtering capabilities, andother applicable design characteristics are proportionately equivalent to the evaluated system.


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