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NSF Standard Design Modifications – How they affect NSF Certification
Texas Onsite Wastewater Association Conference
Waco, TXMarch 12, 2014
Outline
• NSF International• Consensus Standards Development• Wastewater Treatment System Standards• Modifications and how they affect
Certification
NSF Is A Global Leader In Public Health And Safety
• Independent, Not-for-profit organization
• Developer of over 72 national consensus standards
• Steadfast ties with key associations and govt. agencies
• Service provider to over 12,000 companies in 100 countries
Core Public Health Activities
NSF Collaborations
• NSF is a World Health Organization Collaborating Centre for: – Food Safety– Water Safety
• Drinking Water Quality Guidelines• Recreational Water Safety
Guidelines– Indoor Environment
• Work closely with International, Federal State and Local Regulators:– FDA– USDA– EPA– U.S. Government/Legislature– And many more…
NSF Standards Development Process
Manufacturers Users
RegulatorsRegulatory
ConsumersLaboratoriesUtilitiesConsultants
FederalState Local
Industry Representatives
NSF Joint Committee
• Consensus body of experts that oversees development of NSF Onsite Wastewater Standards.
• Balanced membership of external stakeholders.– Public Health– System Manufacturers– Users
• Responsible for all new standards and maintenance/revision of current.
NSF International –Wastewater Treatment
System Standards
NSF/ANSI for Onsite Wastewater Treatment Systems
• NSF/ANSI 41-2011 Non-liquid saturated treatment systems (1978)• NSF/ANSI 46-2010 Evaluation of components and devices used in
wastewater (1997)• NSF/ANSI 240-2011 Drainfield trench product sizing for gravity
dispersal onsite wastewater treatment and dispersal systems (2011)• NSF/ANSI 40-2010 Residential wastewater treatment systems (1970)• NSF/ANSI 245-2010 Wastewater treatment systems – nitrogen
reduction (2007)• NSF/ANSI 350-2011 Onsite residential and commercial water reuse
treatment systems (2011)• NSF/ANSI 350-1-2011 Onsite residential and commercial graywater
treatment systems for subsurface discharge (2011)• NSF/ANSI 360-2010 Wastewater treatment systems – field performance
verification (2010)• More under development
Wastewater Program Milestones
• 1965 Ann Arbor, MI Test Facility Opened• 1970 Standard 40 Adopted• 1978 Standard 41 Adopted• 1997 EPA Cooperative Agreement (ETV SWP)• 1999 Septic Tank Effluent Filters Standard 46• 2001 Onsite Wastewater Inspector Accreditation• 2002 Disinfection Devices added to Standard 46• 2003 Waco, TX Test Facility Opened• 2004 Field Monitoring; State of Pennsylvania• 2007 Standard 245 - Nitrogen Reduction Standard• 2007 Standard 46 – UV devices added• 2009 Standard 46 – Ozone devices added• 2010 Standard 360 – Wastewater Field Performance• 2011 Standard 350 - Water Reuse Standard adopted
Current NSF/ANSI Onsite Wastewater Standards
• Standard 41 (1978): Non-Liquid Saturated Treatment Systems(compost toilets)
• Standard 46 (1997): Evaluation of Components and Devices Used in Wastewater Treatment Systems– Septic tank filters– Pumps– Disinfection devices
Current NSF/ANSI Onsite Wastewater Standards
• Standard 40 (1970): Complete residential treatment system with a capacity of 400 to 1500 gpd; CBOD5 and TSS reduction.
• Standard 245 (2007): Complete residential treatment system with a capacity of 400 to 1500 gpd; Nitrogen reduction.
Current NSF/ANSI Onsite Wastewater Standards
• Standard 350 (2011): Onsite residential treatment system with a capacity of 400 to 1500 gpd; CBOD5, TSS, E-coli & turbidity reduction.
• Standard 350-1 (2011): Onsite residential & Commercial treatment system for subsurface discharge with a capacity of 400 to 1500 gpd; CBOD5, TSS, E-coli, & turbidity reduction.
NSF Approved Modifications – How they affect NSF Certification
Service Obligations of the Manufacturer
• Residential treatment systems• Once in the standard, now in policy• Service Related Obligations
– Two year initial service policy with purchase, four site visits– Extended policy available for fee– Stand-by parts in stock– Service within 48 hours
• Responsibility often transferred to authorized representative; compliance ultimately resides with the manufacturer
Product Modifications
Certified Systems:• Review of all design changes• Review of all product series• Must be reviewed and approved in writing prior to
production and use of the NSF Mark• May require no additional testing• Determine impact on all requirements of the
standard
Alternate Aerator Modification Approval
• Most common request is for alternate aerators
• For most systems, we will approve (without testing) if the alternate aerator delivers airflow from 80 to 130 percent of the target airflow.
• Alternate aerators will always be compared to the tested system.
• Larger size Models are reviewed and approved using PE stamped drawings and proportional equivalence.
Thank You for Your Participation
Contact Information
• Sharon Steiner NSF International
Business Unit Manager 789 N. Dixboro Rd.
Wastewater Treatment Unit program Ann Arbor, MI 48105
734-827-6846 800-673-6275
[email protected] www.nsf.org
• Tom Bruursema
General Manager
Environmental and Sustainability Services
734-769-5575
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