1、NSF International Standard / American National StandardNSF/ANSI 40 - 2013 Residential WastewaterTreatment SystemsNSF International, an independent, not-for-profit, non-governmental organization, is dedicated to being the leading global pro-vider of public health and safety-based risk management solu
2、tions while serving the in-terests of all stakeholders. This Standard is subject to revision. Contact NSF to confirm this revision is current. Users of this Standard may request clarifications and inter-pretations, or propose revisions by contacting: Chair, Joint Committee on Wastewater Technology c
3、/o NSF International 789 North Dixboro Road, P.O. Box 130140 Ann Arbor, Michigan 48113-0140 USA Phone: (734) 769-8010 Telex: 753215 NSF INTL FAX: (734) 769-0109 E-mail: infonsf.org Web: http:/www.nsf.orgNSF/ANSI 40 2013 i NSF International Standard/ American National Standard for Wastewater Technolo
4、gy Residential wastewater treatment systems Standard Developer NSF International NSF International Board of Directors Designated as an ANSI Standard April 21, 2013 American National Standards Instituteii Prepared by The NSF Joint Committee on Wastewater Technology Recommended for Adoption by The NSF
5、 Council of Public Health Consultants Adopted by The NSF Board of Directors November 1970 Revised November 1978 Revised May 1983 Revised 1990 Revised May 1996 Revised January 1999 Revised July 2000 Revised November 2004 Revised August 2005 Revised January 2009 Revised November 2010 Revised August 20
6、12 Revised April 2013 Published by NSF International PO Box 130140, Ann Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the designation “NSF/ANSI 40 2013.” Copyright 2013 NSF International Previous Editions 2012, 2011, 2009,
7、2005, 2004, 2000, 1999, 1996, 1990, 1983, 1978, 1970 Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, elec-tronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in th
8、e United States of America. iii Disclaimers1NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of NSF represent its pro-fessional judgment. NSF shall not be
9、 responsible to anyone for the use of or reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Standard. NSF Standards provide basic c
10、riteria to promote sanitation and protection of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety requirement. Participation in NSF Standards develo
11、pment activities by regulatory agency representatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards. Preference is given to the use of performance criteria measurable by examination or testing in NSF Standards development when such performance
12、criteria may reasonably be used in lieu of design, materials, or construc-tion criteria. The illustrations, if provided, are intended to assist in understanding their adjacent standard requirements. However, the illustrations may not include all requirements for a specific product or unit, nor do th
13、ey show the only method of fabricating such arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. Unless otherwise referenced, the annexes are not considered an integral part of NSF Standards. The annexes are provided as general guidelines t
14、o the manufacturer, regulatory agency, user, or certifying organization. 1The information contained in this Disclaimer is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such, this Disclaimer may contain material that
15、has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. iv This page is intentionally blank. v Contents 1 General . 1 1.1 Purpose 1 1.2 Scope . 1 1.3 Alternate materials, design, and construction 1 1.4 P
16、erformance classification . 1 2 Normative references . 2 3 Definitions . 2 4 Materials . 3 4.1 Interior surfaces . 3 4.2 Exterior surfaces 3 4.3 Welding 3 4.4 Dissimilar metals 4 5 Design and construction . 4 5.1 Exposed surfaces . 4 5.2 Structural integrity 4 5.3 Infiltration and exfiltration resis
17、tance 4 5.4 Noise 4 5.5 Mechanical components 4 5.6 Electrical components 4 5.7 Access ports . 4 5.8 Failure sensing and signaling equipment . 5 5.9 Flow design 5 5.10 Dataplate and service label . 6 6 Product literature 6 6.1 Owners manual . 6 6.2 Additional product literature 7 7 Other documentati
18、on 8 8 Performance testing and evaluation . 9 8.1 Preparations for testing and evaluation 9 8.2 Testing and evaluation conditions, hydraulic loading, and schedules 9 8.3 Sample collection . 11 8.4 Analytical descriptions 12 8.5 Criteria 12 9 Final report 14 Annex A . A1 A.1 Limited warranty . A1 A.2
19、 Service-related obligations . A1 vi Annex B . B1 B.1 Marking the product . B1 B.2 Listing certified companies . B1 B.3 Annual audits B1 B.4 Testing B1 B.5 Corrective action B2 B.6 Enforcement . B2 B.7 Administrative review . B2 B.8 Appeals B2 B.9 Complaints . B2 B.10 Advertising . B2 B.11 Records .
20、 B2 B.12 Public notice B3 B.13 Confidentiality B3 vii Foreword2The purpose of this Standard is to establish minimum materials, design and construction, and performance testing and evaluation requirements for residential wastewater treatment systems. This Standard specifies minimum literature require
21、ments to be supplied by manufacturers to authorized representatives and owners. Minimum service related obligations for manufacturers to extend to owners are also specified. This Standard (NSF/ANSI 40-2013 version includes the following changes: Issue 26 The ballot addressed section 8.4.1 for pH sam
22、pling analysis as well as addressed a reporting requirement in section 9, Final Report. This Standard was developed by the NSF Joint Committee on Wastewater Technology using the consensus process described by the American National Standards Institute. ANSI prohibits the inclusion of commercial terms
23、 and conditions, such as manufacturers warranties and guarantees, in product standards. However, the NSF Joint Committee on Wastewater Technology has historically believed strongly that all certifiers of NSF/ANSI 40 systems should have certification program policies that contain several key elements
24、, including requirements for warranties. It is the Joint Committees belief that these key elements provide valuable assurance of long-term performance as well as protection of public health and the environment. To emphasize the Joint Committees convictions on this issue, two annexes, which are not p
25、art of this Standard, are included for informational purposes and guidance. These annexes are intended to establish a uniform program by which products meeting the scope of this Standard should be certified. Annex A is a sample warranty, and Annex B provides the key elements of a certification progr
26、am. At NSF, both annexes have been adopted as certification program policies. Suggestions for improvement of this Standard are welcome. Comments should be sent to Chair, Joint Committee on Wastewater Technology, c/o NSF International, Standards Department as standardsnsf.org , or PO Box 130140, Ann
27、Arbor, Michigan 48113-0140, USA. 2The information contained in this Foreword is not part of this American National Standard (ANS) and has not been pro-cessed in accordance with ANSIs requirements for an ANS. As such, this Foreword may contain material that has not been subjected to public review or
28、a consensus process. In addition, it does not contain requirements necessary for con-formance to the Standard. viii This page is intentionally blank. 1 2013 NSF NSF/ANSI 40 2013 NSF/ANSI Standard for Wastewater Treatment Systems Residential wastewater treatment systems 1 General 1.1 Purpose The purp
29、ose of this Standard is to establish minimum materials, design and construction, and performance requirements for residential wastewater treatment systems. This standard also specifies the minimum literature that manufacturers shall supply to authorized representatives and owners as well as the mini
30、mum service-related obligations that manufacturers shall extend to owners. 1.2 Scope This Standard contains minimum requirements for residential wastewater treatment systems having rated treatment capacities between 1514 L/day (400 gal/day) and 5678 L/day (1500 gal/day). Management methods for the t
31、reated effluent discharged from residential wastewater treatment systems are not addressed by this Standard. System components covered under other NSF or NSF/ANSI standards or criteria shall also comply with the requirements therein. This Standard shall in no way restrict new system designs, provide
32、d such designs meet the minimum specifications described herein. 1.3 Alternate materials, design, and construction While specific materials, designs, and constructions may be stipulated in this Standard, systems that incorporate alternate materials, designs, or constructions may be acceptable when i
33、t is verified that such systems meet the applicable requirements. 1.4 Performance classification For the purpose of this Standard, systems are classified according to the chemical, biological, and physical characteristics of their effluents as determined by the performance testing and evaluations de
34、scribed herein. All systems within a manufacturers model series may be classified according to the performance testing and evaluation of the system with the smallest hydraulic capacity within the series. Performance testing and evaluation of larger systems within the series (having hydraulic treatme
35、nt capacities within the scope of this Standard) may not be necessary provided that the dimensions, hydraulics, mixing and filtering capabilities, and other applicable design characteristics are proportionately equivalent to the evaluated system. 2013 NSF NSF/ANSI 40 2013 2 2 Normative references Th
36、e following documents contain provisions that, through reference in this text, constitute provisions of this Standard. At the time of publication, the indicated editions were valid. All standards are subject to revision, and parties are encouraged to investigate the possibility of applying the recen
37、t editions of the standards indicated below. American Public Health Association (APHA), American Water Works Association (AWWA) 2) periodic cleaning or replacement of components and removal of residuals as required by the manufacturer in the operations and maintenance manual; NOTE Periodic refers to
38、 all procedures specified in the manufacturers operation and maintenance manual that must be performed within intervals of two years. 3) visual inspection and sampling as required by the manufacturer in the operations and maintenance manual, including a means for collecting a representative effluent
39、 sample and determining the need for residuals removal; and 4) removal (manually or by pumping) of collected residuals as required by the manufacturer in the operations and maintenance manual. If the operations and maintenance manual describes a means to determine the need to remove residuals from a
40、 chamber without ground-level access, then only the ability to install ground-level access shall be required. Systems without ground-level access to a chamber shall be equipped with a means to locate the opening to the chambers. This information shall be provided on or in a ground-level access openi
41、ng. 5.7.2 Access ports shall be protected against unauthorized intrusions. Acceptable protective measures include, but are not limited to: a padlock; a cover that can be removed only with specialized tools; or a cover having a minimum net weight of 29.5 kg (65 lb). 5.8 Failure sensing and signaling
42、equipment The system shall possess a mechanism or process capable of detecting failures of electrical and mechanical components critical to the treatment processes and delivering a visible and audible signal to notify the owner or user of the failure. The system shall possess a mechanism or process
43、capable of detecting a high water condition and delivering a visible and audible signal to notify the owner or user that the water level is above normal operating specifications. Compliance with the requirements of 5.8.1 and 5.8.2 shall be determined by a group of three observers. Observers shall be
44、 employees of the test agency. The visual and auditory signals shall continue to be functional in the event of an electrical, mechanical, or hydraulic malfunction of the system providing power is available to the system and shall resume once power is restarted following the power outage. This does n
45、ot mandate a battery back-up for the alarm system. 5.8.1 Visual Alarm Test The audible portion of the alarm shall be disabled during the visual alarm test. The visual portion of the signal shall be conspicuous from a distance of 15 m (50 ft). There shall be a minimum of 5 random on/off trials of the
46、 visual alarm. The observers shall turn their backs to the alarm panels such that they cannot see the visual portion of the alarm prior to each trial during the visual alarm test. The visual alarm shall be on for a minimum of one trial and off for a minimum of one trial during the test but the on/of
47、f condition shall otherwise be 2013 NSF NSF/ANSI 40 2013 6 selected randomly. Observers shall face the alarm panel when requested during the test. Compliance with these requirements is demonstrated only when all observers provide the correct answer for each trial. 5.8.2 Audible Alarm Test The visual
48、 alarm shall be disabled during the audible alarm test. Observers shall have their backs to the alarm during the audible testing. The audible portion of the signal shall be discernible from a distance of 15 m (50 ft) with a minimum ambient noise level of 60 dbA. When the ambient noise level is less
49、than 60 dbA, it shall be augmented with a steady tone between 100 and 1000 hertz. The ambient noise level shall be measured at the location where the observers will be located. The audible alarm shall be activated a minimum of 3 times. The observers shall record the number of times the audible alarm was heard. Compliance with these requirements is demonstrated only when all observers record the correct number of times the alarm was activated. The audible portion of the alarm shall not exceed 90 dbA at a distance of 3 m (10 ft) when measured outdoors
