TECHNICAL COMMITTEE ON WASTEWATER TREATMENT … · Sam Rizzi Alternate HILL 1103 Schrock Road...

TECHNICAL COMMITTEE ON WASTEWATER TREATMENT PLANTS

First Draft Meeting Agenda September 10-12, 2013

Hampton Inn, Columbus, Ohio

September 10 (12 PM-5 PM) September 11 (8 AM-5 PM)

September 12 (8 AM-12 PM) Note- Lunch will be provided on day one. Continental Breakfast served both mornings, days 2-3 at 7:30 AM. 1). Welcome-Committee Chair, Glenn McGinley. 2). Introduction of Attendees and Update of Committee Roster. 3). Approval of Minutes of Last Meeting/Conference call - July 9, 2013. (attached-820_WAA_preFDMinutes-07_13.pdf) 4). Staff updates-Nancy Pearce.

a) Committee membership update. (attached-WAA-AAA- Aug 2013) b) Annual 2015 revision cycle schedule. (attached-Schedule A2015.pdf) c) New Process Presentation-Nancy Pearce NFPA Staff. 5). Review of Public Inputs NFPA 820. (attached—820 Public Input) 6). Additional First Revision Considerations for Committee-Task Group Work. a) NFPA 72 Signaling/Alarms (attached-Groppetti NFPA 72.docx) b) Exclusions in NFPA 820 (attached-Wheeler 1.1.3.docx and Wheeler def sewers.docx) c) Chapter 9 Ventilation d) Combustible Dust e) Co-generation f) Submersible Pumps g) Fine Screening h) Combustible Gas Detection i) NFPA 54 7). Additional Issues for Consideration. a) Table format change Proposal (attached NFPA 820 Table revisions v2.xlsx and v3.xlsx) b) Staff review of issues for consideration (attached-Committee work compiled.docx) c) NFPA 56 letter requesting incorporation by reference (attached-NFPA 56 letter.docx) d) Other ( Wheeler B.4.2.docx) 8). Adjournment.

Pre-First Draft Meeting Technical Committee on Wastewater Treatment Plants

On line/Conference Call July 9, 2013 2-4 PM EDT

(1-3:00 PM CT; 12-2:00 PM MT; 11-1:00 PM PT)

Attendees: Glenn McGinley-Chair Josef Berktold, WEF Bradley Cyrus, Gormann-Rupp Company Garr Jones, Brown and Caldwell Linda Leong, San Francisco Public Utilities Diep Nguyen, DTN Engineers, Inc Thomas Stilwell, Xtralis James Wheeler, EPA Claudio Groppetti, Xtralis Jeff Leano, City and County of San Francisco Dan Olah, Applicant Nancy Pearce, NFPA Staff James Grimard, NFPA Intern

1. Welcome and Introductions-Glenn McGinley, Committee Chair, welcomed committee members and outlined the meeting agenda.

2. Meeting Minutes from March 14, 2013 were approved as written.

3. Public Inputs for NFPA 820. The chair told the committee that 51 public inputs had been

received for NFPA 820, possibly a record number of inputs for this document in recent years. The committee will have to review all 51 inputs in addition to other task group input and other committee recommendations. It is expected that the meeting will take the full two days to complete.

4. Report from Task Groups

a. NFPA 72 Signaling/Alarm-drafts submitted via Terra. Task Group has met several times and has been working with NFPA 72 staff liaison as well to determine what coordination may be needed between terminology and requirements in NFPA 72, 720 and 820. Draft PIs will need some revision but they are in the system now as a placeholder for committee action at the September meeting in Columbus.

b. Exclusions on 820-Public input submitted by Jim Wheeler.

c. Chapter 9 Ventilation –No PIs submitted. James Grimard, NFPA Intern explained to the committee that he had done some research on the origins of the ventilation standards, which appear to come from the 1978 Ten states standard. James has done a review of some of the previous NFPA 820 revisions to look for ventilation changes as well and will be putting together a summary for the committee. Dan Olah also shared some information about various Ontario ventilation codes. The task group may make recommendations for slight revisions at the meeting if need be based on further review.

d. Combustible Dust-coordination with NFPA 654. No PI submitted. Task group may recommend annex material or a committee input on the topic of combustible dust. A draft will be prepared for the committee to review prior to the meeting.

e. Co-generation. No PIs submitted. Committee recognizes need to address this issue but also will need to determine if other NFPA standards already apply. James Grimard will do some research on this subject and will get back to the committee.

f. Submersible Pumps-May put annex material to clarify that submersible pumps must still meet the requirements for Class 1 Division 1 electrical. Nancy indicated that many questions on this received through advisory service. Brad Cyrus will follow up with Task Group Chair, John Harrell and development Annex material or proposed standard language for review at the September meeting.

g. Fine Screening-No PI submitted. Glenn will develop draft revision for the meeting.

h. Combustible Gas Detection. No PI submitted. Diep will develop a draft revision for the meeting.

i. Joint task group with NFPA 54 (Bio-gas piping). Meetings with NFPA 54 indicate that committee may be removing bio-gas from the list of fuels covered by the standard because it is not a readily available fuel for commercial use. Task Group members will remain in contact with NFPA 54 and if this change occurs the Wastewater Treatment committee may need to develop changes to NFPA 820.

j. Ovens/Dryers NFPA 86. No task group work has taken place on this topic to date. Joe and Linda will contact the TG chair and develop a recommendation to the committee for the September meeting.

5. Other Committee Business

a. Consideration of new Table format (attached). James Grimard, NFPA intern, modified the existing tables in NFPA 820 to make them more “readable”. James provided several formats and options. The committee made a few suggestions and will consider one of the new formats at the September meeting. James will provide revised tables to Nancy for distribution and review prior to the meeting. b. Advisory Service questions-clarifications needed for upcoming revision. Nancy explained that NFPA 820 receives a fairly large number of advisory service questions. Nancy keeps track of some of the questions that have pointed to a need to clarify or revise the existing standard. Further review of these questions should be done prior to the September meeting.

6. First Draft meeting-Columbus Ohio, September 10-12, 2013. Committee members and

guests have until August 19th to make reservations at the NFPA rate. Meeting will start at noon on Sept 10th and end at noon on September 12th. A full agenda with attachments will be sent prior to the meeting date.

7. Adjournment. Meeting was adjourned at 3:45 PM.

Address List No PhoneWastewater Treatment Plants WAA-AAA

Nancy Pearce08/29/2013

WAA-AAA

Glenn E. McGinley, II

ChairOhio Public Employment Risk Reduction Program4448 Prairie Creek LaneMaumee, OH 43537-9020

E 1/16/2003WAA-AAA

Josef Berktold

PrincipalDonohue Associates3311 Weeden Creek RoadSheboygan, WI 53081Water Environment Federation

U 08/09/2012

WAA-AAA

John G. Brosnan

PrincipalCH2M HILL7075 Maynard Place ENew Albany, OH 43054Alternate: Sam Rizzi

SE 08/09/2012WAA-AAA

Bradley A. Cyrus

PrincipalThe Gorman-Rupp CompanyPO Box 1217Mansfield, OH 44901Water & Wastewater Equipment Manufacturers Assn., Inc.

M 1/10/2008

WAA-AAA

John N. Harrell

PrincipalWilson & Company, Inc.800 East 101st Terrace, Suite 200Kansas City, MO 64131Alternate: Mark W. Peterson

SE 1/1/1987WAA-AAA

Clark A. Henry

PrincipalEnvironment One Corporation2773 Balltown RoadNiskayuna, NY 12309Alternate: George A. Earle, III

M 10/4/2007

WAA-AAA

Garr M. Jones

PrincipalBrown and Caldwell308A Wood Run DriveWhitefish, MT 59937Alternate: Scott Hall

SE 1/1/1984WAA-AAA

Stephan Larmann

PrincipalSchischek Inc.4460 Brookfield Corporate Drive, Suite BChantilly, VA 20151

M 08/09/2012

WAA-AAA

Linda Leong

PrincipalSan Francisco Public Utilities Commission750 Phelps StreetSan Francisco, CA 94124Alternate: Jeff Leano

U 3/21/2006WAA-AAA

Christine Minor

PrincipalCity of Toledo, Division of Water Reclamation3900 North Summit Street, Bldg. 1Toledo, OH 43611

U 10/4/2007

WAA-AAA

Diep T. Nguyen

PrincipalDTN Engineers, Inc.1611 Telegraph Avenue, Suite 809Oakland, CA 94612Alternate: Charles D. Olah


Gerald P. Robinson

PrincipalHatch Mott MacDonald5111 North 12th AvenuePensacola, FL 32514Alternate: Scott R. Connor

SE 10/29/2012

WAA-AAA

Thomas D. Stilwell

PrincipalXtralis, Inc.700 Longwater Drive, Suite 100Norwell, MA 02061Alternate: Claudio C. Groppetti

M 8/2/2010WAA-AAA

James F. Wheeler

PrincipalUS Environmental Protection Agency1200 Pennsylvania Avenue, NWMail Code 4204MWashington, DC 20460

E 1/1/1982

1

Address List No PhoneWastewater Treatment Plants WAA-AAA

Nancy Pearce08/29/2013

WAA-AAA

Scott R. Connor

AlternateTeam-1 Academy Inc.760 Pacific Road, Unit 19Oakville, ON L6L 6M5 CanadaPrincipal: Gerald P. Robinson


George A. Earle, III

AlternateEnvironment One Corporation2773 Balltown RoadNiskayuna, NY 12309Principal: Clark A. Henry

M 10/4/2007

WAA-AAA

Claudio C. Groppetti

AlternateXtralis, Inc.2445 Heron LaneVictoria, MN 55386Principal: Thomas D. Stilwell

M 10/18/2011WAA-AAA

Scott Hall

AlternateBrown and Caldwell990 Hammond Drive, Suite 400Atlanta, GA 30328Principal: Garr M. Jones

SE 10/29/2012

WAA-AAA

Jeff Leano

AlternateCity And County of San Francisco1325a Evans AvenueSan Francisco, CA 94124Principal: Linda Leong

U 08/09/2012WAA-AAA

Charles D. Olah

AlternateEMA Canada2381 Bristol Circle, Suite A200Oakville, ON L6H 5S9 CanadaPrincipal: Diep T. Nguyen

SE 07/29/2013

WAA-AAA

Mark W. Peterson

AlternateWilson & Company, Inc.1700 East Iron AvenueSalina, KS 67401Principal: John N. Harrell


Sam Rizzi

AlternateHILL

1103 Schrock RoadColumbus, OH 43229Principal: John G. Brosnan

SE 03/07/2013

WAA-AAA

Nancy Pearce

Staff LiaisonNational Fire Protection Association1 Batterymarch ParkQuincy, MA 02169-7471

1/11/2012

2

2015 ANNUAL REVISION CYCLE *Public Input Dates may vary according to standards and schedules for Revision Cycles may change. Please check the NFPA Website for the most up‐to‐date information on Public Input Closing Dates and schedules at

www.nfpa.org/document # (i.e. www.nfpa.org/101) and click on the Next Edition tab.

Process Stage

Process Step

Dates for

TC

Dates forTC with CC

Public Input Closing Date* 7/8/2013 7/8/2013

Final Date for TC First Draft Meeting 12/13/2013 9/13/2013

Public Input Posting of First Draft and TC Ballot 1/31/2014 10/25/2013

Stage Final date for Receipt of TC First Draft ballot 7/21/2014 11/15/2013

(First Draft) Final date for Receipt of TC First Draft ballot ‐ recirc 2/28/2014 11/22/2013

Posting of First Draft for CC Meeting 11/29/2013

Final date for CC First Draft Meeting 1/10/2014

Posting of First Draft and CC Ballot 1/31/2014

Final date for Receipt of CC First Draft ballot 2/21/2014

Final date for Receipt of CC First Draft ballot ‐ recirc 2/28/2014

Post First Draft Report for Public Comment 3/7/2014 3/7/2014

Public Comment Closing Date for Paper Submittal* 4/11/2014 4/11/2014

Public Comment Closing Date for Online Submittal (e‐PC)* 5/16/2014 5/16/2014

Final Date to Publish Notice of Consent Documents (Standards that received no Comments)

5/30/2014 5/30/2014

Appeal Closing Date for Consent Standards (Standards that received no Comments)

6/13/2014 6/13/2014

Final date for TC Second Draft Meeting 10/31/2014 7/25/2014

Comment Posting of Second Draft and TC Ballot 12/12/2014 9/5/2014

Stage Final date for Receipt of TC Second Draft ballot 1/2/2015 9/26/2014

(Second Final date for receipt of TC Second Draft ballot ‐ recirc 1/9/2015 10/3/2014

Draft) Posting of Second Draft for CC Meeting 10/10/2014

Final date for CC Second Draft Meeting 11/21/2014

Posting of Second Draft for CC Ballot 12/12/2014

Final date for Receipt of CC Second Draft ballot 1/2/2015

Final date for Receipt of CC Second Draft ballot ‐ recirc 1/9/2015

Post Second Draft Report for NITMAM Review 1/16/2015 1/16/2015

Tech Session Notice of Intent to Make a Motion (NITMAM) Closing Date 3/6/2015 3/6/2015

Preparation Posting of Certified Amending Motions (CAMs) and Consent Standards

5/1/2015 5/1/2015

(& Issuance) Appeal Closing Date for Consent Standards 5/16/2015 5/16/2015

SC Issuance Date for Consent Standards 5/26/2015 5/26/2015

Tech Session Association Meeting for Standards with CAMs 6/22‐25/2015 6/22‐25/2015

Appeals and Appeal Closing Date for Standards with CAMs 7/15/2015 7/15/2015

Issuance SC Issuance Date for Standards with CAMs 8/20/2015 8/20/2015

Approved___ October 18, 2011 _ Revised__March 7, 2013_____________

Public Input No. 45-NFPA 820-2013 [ Global Input ]

Revise "low flame spread" and "low flame spread rating" by "low flame spreadindex"

Statement of Problem and Substantiation for Public Input

Uses the correct terminology

Related Public Inputs for This Document

Related Input RelationshipPublic Input No. 40-NFPA 820-2013 [Section No. 3.3.50]

Submitter Information Verification

Submitter Full Name: Marcelo HirschlerOrganization: GBH InternationalStreet Address: City:State: Zip: Submittal Date: Sat Jul 06 19:58:53 EDT 2013

Copyright Assignment

I, Marcelo Hirschler, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. Ihereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am Marcelo Hirschler, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature

Page 1 of 270National Fire Protection Association Report

9/3/2013http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentParams=%28Comment...

Public Input No. 35-NFPA 820-2013 [ Section No. 1.3.4 ]

1.3.4 Ventilation Practices.Ventilation rates required by this standard shall be to minimize fire and explosion hazards, because insufficient ventilation rates can exposepersonnel to toxic and . The ventilation rates required for minimizing explosion risks may not be adequate to protect from toxicity or biologicalhazards.


The current version was confusing.


Submitter Full Name: John PuskarOrganization: Puskarco Inc.Street Address: City:State: Zip: Submittal Date: Thu Jul 04 18:56:13 EDT 2013


I, John Puskar, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I herebywarrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am John Puskar, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature



Public Input No. 33-NFPA 820-2013 [ Section No. 2.2 ]

2.2 NFPA Publications.National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 10, Standard for Portable Fire Extinguishers, 2010 edition.

NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam, 2010 edition.

NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, 2011 edition.

NFPA 12A, Standard on Halon 1301 Fire Extinguishing Systems, 2009edition.NFPA 13, Standard for the Installation of Sprinkler Systems, 2010 edition.

NFPA 14, Standard for the Installation of Standpipe and Hose Systems, 2010 edition.

NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, 2012 edition.

NFPA 16, Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems, 2011 edition.

NFPA 17, Standard for Dry Chemical Extinguishing Systems, 2009 edition.

NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2010 edition.

NFPA 22, Standard for Water Tanks for Private Fire Protection, 2008 edition.

NFPA 24, Standard for the Installation of Private Fire Service Mains and TheirAppurtenances, 2010 edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2011 edition.

NFPA 30, Flammable and Combustible Liquids Code, 2012 edition.

NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals,2011 edition.NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2009 edition.

NFPA 54, National Fuel Gas Code, 2012 edition.

NFPA 56, Standard for fire and explosion prevention during cleaning and purging of flammable gas piping systems

NFPA 61, Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities, 2008 edition.

NFPA 68, Standard on Explosion Protection by Deflagration Venting, 2007 edition.

NFPA 69, Standard on Explosion Prevention Systems, 2008 edition.

NFPA 70® , National Electrical Code®, 2011 edition.

NFPA 70E® , Standard for Electrical Safety in the Workplace®, 2012 edition.



NFPA 72® , National Fire Alarm and Signaling Code, 2010 edition.

NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems and Equipment, 2009 edition.

NFPA 85, Boiler and Combustion Systems Hazards Code, 2011 edition.

NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, 2012 edition.NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2010 edition.

NFPA 101® , Life Safety Code®, 2012 edition.

NFPA 204, Standard for Smoke and Heat Venting, 2012 edition.

NFPA 241, Standard for Safeguarding Construction, Alteration, and Demolition Operations, 2009 edition.

NFPA 251, Standard Method of Tests Fire Resistance of Building Construction and Material, 2006 edition.

NFPA 259, Standard Test Method for Potential Heat of Building Materials,2008 edition.

NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, 2008 edition.

NFPA 497, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2008 edition.

NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2008 edition.

NFPA 600, Standard on Industrial Fire Brigades, 2010 edition.

NFPA 601, Standard for Security Services in Fire Loss Prevention, 2010 edition.

NFPA 654, Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids,2006 edition.

NFPA 780, Standard for the Installation of Lightning Protection Systems, 2011 edition.

NFPA 1142, Standard on Water Supplies for Suburban and Rural FireFighting, 2012 edition.

NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems, 2012edition.


NFPA 56 has relevance to this standard





2.2 NFPA Publications.National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 10, Standard for Portable Fire Extinguishers, 2010 edition.

NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam, 2010 edition.

NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, 2011 edition.

NFPA 12A, Standard on Halon 1301 Fire Extinguishing Systems, 2009 edition.

NFPA 13, Standard for the Installation of Sprinkler Systems, 2010 edition.

NFPA 14, Standard for the Installation of Standpipe and Hose Systems, 2010 edition. NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, 2012 edition.

NFPA 16, Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems, 2011 edition.

NFPA 17, Standard for Dry Chemical Extinguishing Systems, 2009 edition.

NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2010 edition.

NFPA 22, Standard for Water Tanks for Private Fire Protection, 2008 edition.

NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2010 edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, 2011 edition.

NFPA 30, Flammable and Combustible Liquids Code, 2012 edition.

NFPA 45, Standard on Fire Protection for Laboratories Using Chemicals, 2011 edition.

NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2009 edition.

NFPA 54, National Fuel Gas Code, 2012 edition. NFPA 61, Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Processing Facilities, 2008 edition.

NFPA 68, Standard on Explosion Protection by Deflagration Venting, 2007 edition.

NFPA 69, Standard on Explosion Prevention Systems, 2008 edition.

NFPA 70®, National Electrical Code®, 2011 edition.

NFPA 70E®, Standard for Electrical Safety in the Workplace®, 2012 edition.

NFPA 72®, National Fire Alarm and Signaling Code, 2010 edition.

NFPA 82, Standard on Incinerators and Waste and Linen Handling Systems andEquipment, 2009 edition.

NFPA 85, Boiler and Combustion Systems Hazards Code, 2011 edition.



NFPA 90A, Standard for the Installation of Air-Conditioning and VentilatingSystems, 2012 edition.

NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases,Mists, and Noncombustible Particulate Solids, 2010 edition.

NFPA 101®, Life Safety Code®, 2012 edition.

NFPA 204, Standard for Smoke and Heat Venting, 2012 edition. NFPA 241, Standard for Safeguarding Construction, Alteration, and DemolitionOperations, 2009 edition.

NFPA 251, Standard Method of Tests Fire Resistance of Building Construction and Material, 2006 edition.

NFPA 259, Standard Test Method for Potential Heat of Building Materials, 2008 edition.

NFPA 496, Standard for Purged and Pressurized Enclosures for ElectricalEquipment, 2008 edition.

NFPA 497, Recommended Practice for the Classification of Flammable Liquids,Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2008 edition.

NFPA 499, Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, 2008 edition.

NFPA 600, Standard on Industrial Fire Brigades, 2010 edition.

NFPA 601, Standard for Security Services in Fire Loss Prevention, 2010 edition.

NFPA 654, Standard for the Prevention of Fire and Dust Explosions from theManufacturing, Processing, and Handling of Combustible Particulate Solids, 2006 edition. NFPA 780, Standard for the Installation of Lightning Protection Systems, 2011 edition.

NFPA 1142, Standard on Water Supplies for Suburban and Rural Fire Fighting,2012 edition.

NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems, 2012 edition.


mmm







2.3.1 ASTM Publications.ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.

ASTM E 108, Standard Test Methods for Fire Tests of Roof Coverings, 2010 2011 .

IEEE/ASTM SI 10, Use of the International System of Units (SI): the Modern Metric System, 1997.


date update


Submitter Full Name: Marcelo HirschlerOrganization: GBH InternationalStreet Address:City: State: Zip:Submittal Date: Sat Jul 06 19:27:26 EDT 2013






Public Input No. 36-NFPA 820-2013 [ Section No. 3.3.32.2 ]

3.3.32.2* Fuel Gas.A gas used as a fuel source, including natural gas, manufactured gas, sludge gas, liquefied petroleum gas–air mixtures, liquefied petroleum gas in the vapor phase, and mixtures of these gases.


You should consider harmonizing this definition with that used in NFPA 54, 3.3.5.1









3.3.42 Material.3.3.42.1 Limited-Combustible ( Material) . Refers to a building construction material not complying with the definition of noncombustible material that, in (See 8.2.2)

3.3.42.2 Noncombustible (Material). (See 8.2.1)8.2 Combustibility of materials

8.2.1 Noncombustible Material.8.2.1.1 A material that complies with any of the following shall be considered a noncombustible material:(1)*A material that, in the form in which it is used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors when subjected to fire or heat(2) A material that is reported as passing ASTM E 136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 Degrees C(3) A material that is reported as complying with the pass/fail criteria of ASTM E 136 when tested in accordance with the test method and procedure in ASTM E 2652, Standard Test Method for Behavior of Materials in a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 Degrees C8.2.1.2 Where the term limited-combustible is used in this Code , it shall also include the term noncombustible .8.2.2* Limited-Combustible Material. A material shall be considered a limited-combustible material where all the conditions of 8.2.2.1 and 8.2.2.2, and the conditions of either 8.2.1.3 or8.2.1.4, are met.8.2.2.1 The material shall not comply with the requirements for noncombustible material in accordance with 8.2.1.8.2.2.2 The material, in the form in which it is used,

hasshall exhibit a potential heat value not exceeding 3500 Btu/lb ( 8141 kJ/kg(3500 Btu/lb),where tested in accordance with NFPA 259and includes (1) materials having a , Standard Test Method for Potential Heat of Building Materials .8.2.2.3 The material shall have the structural base of a noncombustible material , with a surfacing not exceeding a thickness of



1 ⁄ 81⁄8 in. (3.2 mm) that haswhere the surfacing exhibits a flame spread index not greater than 50 ; and (2) materialswhen tested in accordance with ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials , or ANSI/UL 723, Standard for Test for Surface Burning Characteristicsof Building Materials .8.2.2.4 The material shall be composed of materials that , in the form and thickness used, other than as described in (1), having neitherneither exhibit a flame spread index greater than 25 nor evidence of continued progressive combustion when tested in accordance with ASTM E 84 , Standard Test Method for Surface Burning Characteristics of Building Materials, or ANSI/UL 723, Standard for Test for Surface Burning Characteristics of Building Materials,and shall be of such composition that all surfaces that would be exposed by cutting through the material on any plane wouldhave neither exhibit a flame spread index greater than 25 nor exhibit evidence of continued progressive combustion when tested in accordance with ASTM E 84 or ANSI/UL 723 .38 .32 .42.2 * Noncombustible Material.In wastewater treatment facilities, a material that, in the form in which it is used and under the conditions anticipated, will not ignite, burn, support combustion, or release flammable vapors when subjected tofire or heat.2.5 Where the term limited-combustible is used in this Code , itshall also include the term noncombustible .A.8.2.1 The provisions of 4.6.13 do not require inherently noncombustible materials to be tested in order to be classified as noncombustible materials.A.8.2.1.1(1) Examples of such materials include steel, concrete,masonry, and glass.A.8.2.2 Materials subject to increase in combustibility or flame spread index beyond the limits herein established through the effects of age, moisture, or other atmospheric condition are considered combustible. (See NFPA 259, Standard Test Method for Potential Heat of Building Materials , and NFPA 220, Standard on Types ofBuilding Construction .)Also, add references to ASTM E136 (2012), ASTM E2652 (2012) and NFPA 259 into chapter 2Also renumber sections 8.2 and subsequent ones




NFPA 5000 (and NFPA 1 and NFPA 101) have updated the definitions of noncombustible materials and limited combustible material and the proposed text is an extract from there.









3.3.47* Physically Separated.A gastight partition between two adjacent spaces, or two nonadjacent spaces, with no means of gas communication between the spaces.


I withdraw my earlier comment about defining physically separated. I did not remember the definition here. I do however wonder how one knows that the separation is gas tight after some number of years of service?









3.3.50 Rating.3.3.50.1 Fire Resistance Rating.The time, in minutes or hours, that materials or assemblies have withstood a fire exposure as established in accordance with the test procedures of NFPA 251. [ 220 , 2012] determined by the tests, or methods based on tests, prescribed by this standard.3.3.

50.225 * Low FlameSpread Rating.A flame spread rating of 25 or less.spread index. A number obtained according to ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials, or ANSI/UL 723, Standard for Test for Surface Burning Characteristics of Building Materials. [NFPA 220]

A.3.3.25 A flame spread index of 25 or less (LFS) is a flame spread index for a Class A material in accordance with ASTM E84 and is generally considered a low flame spread index.

Also renumber definitions starting in 3.3.25


1. Fire resistance rating (formerly determined in accordance with NFPA 251, now withdrawn) is normally determined in accordance with ASTM E119. However modern NFPA definitions (including in NFPA 5000) just refer to a generic test method. Alternately the reference to NFPA 251 could be replaced by a reference to ASTM E119, as it is the replacement for NFPA 251.

2. Flame spread rating has now been replaced as a term by flame spread index. The NFPA 220 definition of flame spread index is recommended for use instead of that now in NFPA 820. There is nothing in ASTM E84 about flame spread rating or about what is a low flame spread rating.

3. A corresponding change is also made elsewhere.






3.3.54.5 Industrial Sewer.A sewer intended to receive only industrial wastewater or other liquid or water-carried wastes. (See also 3.3.54.12, Sanitary Sewer; 3.3.54.13, Storm Sewer; and 3.3.54.4, Combined Sewer.)

3.3.54.5 Industrial Sewer.

A sewer that is intended to recieve only industrial wastewater, or other liquid, or other water-carried wastes. e.g., Is located on private properity, is owned and operated to carry industry specific contaninanents, and is properly treated to federal and state requirements before direct discharged or receives proper pre-treatment in accordance with federal or state requirements before discharge to a municipal sewer system.


There is confussion about the the reason for excluding induxtrial sewers for the document in section 1.1.3.5.


Submitter Full Name: James WheelerOrganization: US Environmental Protection AgStreet Address: City: State:Zip: Submittal Date: Wed Jul 03 14:40:54 EDT 2013


I, James Wheeler, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am James Wheeler, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




3.3.54.11 Residential Sewer.A sewer intended to receive only residential wastewater. (See also 3.3.54.4, Combined Sewer; 3.3.54.12, Sanitary Sewer; and 3.3.54.13, Storm Sewer.)

3.3.54.11 Residential Sewer: A sewer intended to receive only residential domestic wastewater. (see also 3.3.54.4, combined sewer ; 3.3.54.12, sanitary sewer; and3.3.54.13 Storm Sewer ,


Confussion about the defination of an individual sewer.


Submitter Full Name: James WheelerOrganization: US Environmental Protection AgStreet Address: City: State:Zip: Submittal Date: Mon Jul 08 08:56:04 EDT 2013






Public Input No. 51-NFPA 820-2013 [ New Section after 3.3.61 ]

Supervising StationA constantly attended location. Upon receipt of CGD / Ventilation Failure / Pressurization Failure alarm signals, Supervising Station personnel shall perform the following actions in the order listed;(1) Where required by the emergency response agency, immediately retransmit indication of the alarm signal.(2) Contact the responsible party(s) in accordance with the notification plan.


Clarification regarding 7.5.4 reference to supervised signaling systems as set forth in NFPA 72.


Submitter Full Name: CHARLES OLAHOrganization: EMA CANADAStreet Address: City:State: Zip: Submittal Date: Mon Jul 08 16:14:48 EDT 2013


I, CHARLES OLAH, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement ofProblem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am CHARLES OLAH, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




4.2* Design and Construction. The design and construction of collection system facilities shall conform to Table 4.2, which summarizes the various components associated with wastewater collection and transport systems.Table 4.2 Collection Systems



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation

Extent of Classified

Area

NEC -Area Electrical

Classification (All Class I, Group D)

MCofo

S

1

MATERIALS USED IN REHABILITATION, RECONSTRUCTION, OR SLIP-LINING OF SEWERS

NA NA NA NA In wit

2

INDUSTRIAL SEWER Sewer transporting industrial wastewater only (no sanitary wastewater)

Not included within the scope of this sta

3

STORM SEWER

Sewer transporting storm water only (no sanitary wastewater)

Possible ignition of flammable gases and floating flammableliquids

NNV Inside of sewer Division 2 In

wit

4

STORM WATER PUMPING STATION WET WELLS

Liquid side of pumping station serving only a storm sewer system


NNV Entire room or space Division 2 NC

LF

5a

STORM WATER PUMPING STATION DRY WELLS

Dry side of a pumping station serving only a storm sewer system andphysically separated from wet well

Buildup of vapors from flammable or combustibleliquids

D Entire dry well

Division 2, or unclassified, if space provided withpressurization in accordance with NFPA 496

NCLF

b C Unclassified

6

PRESSURE SEWER (Force main) Sewer under pressure (flooded discharge pipe from pump or tank)


7

BUILDING SEWER (Lateral sewer or drain) Sewer serving a house or single building (plumbing)




Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

S

8

INDIVIDUAL RESIDENTIAL SEWER

Sewer serving one but not more than five dwellings

NA NNVWithin enclosed space

Unclassified NR

9

INDIVIDUAL RESIDENTIAL PUMPING UNITS

Pumping units serving one but not more than five dwellings (e.g.,grinder pumps, septic tank effluent pumps, ejector pumps)


Unclassified NR

10

a RESIDENTIAL SEWER

Sewer transporting primarily residential wastewater

Possible ignition of flammable gases and floatingflammable liquids

NNVWithin enclosed space

Division 2In wit

b B Unclassified

11 a

RESIDENTIAL WASTEWATER PUMPING STATION WET WELL

Pumping station transporting primarily residential wastewater

Possible ignition offlammable gases and floating flammable liquids

A Entire room or space Division 2 NC

LF

b B Unclassified

12 a

RESIDENTIAL WASTEWATER PUMPING STATION DRY WELL

Dry side of a pumping station transporting primarily residentialwastewater

Buildup of vapors from flammable or combustible liquids

D Entire room or space Division 2 NC

LF

b C Unclassified

13

OUTFALL SEWER Final discharge pipe from a treatment plant, transporting treated wastewater

NA NNV NA Unclassified NR



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

S

14 a

SANITARY SEWER Sewer transporting domestic, commercial, andindustrial wastewater



wit

b B Division 2

15 a

COMBINED SEWER Sewer transporting domestic, commercial, andindustrial wastewater and storm water



wit

b B Division 2

16 a

WASTEWATER PUMPING STATION WET WELLS

Liquid side of a pumping station serving a sanitary sewer or combined system


A Entire room or space Division 1 NC

LF

b B Division 2

17 a

BELOWGRADE OR PARTIALLY BELOWGRADE WASTEWATER PUMPING STATIONDRY WELL

Pump room physically separated from wet well; pumping of wastewater from a sanitary or combined sewer system through closed pumps and pipes

Buildup ofvapors from flammable or combustible liquids

C Entire space or room Unclassified NC

LF

b D

Division 2, or unclassified, if space provided withpressurization in accordance with NFPA 496



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

S

18

ABOVEGRADE WASTEWATER PUMPING STATION Pump room physically separated with no personnel access to wet well; pumping of wastewater from a sanitary or combined sewer system through closed pumps and pipes

NA NR NA Unclassified NCLF

19 a

ABOVEGRADE WASTEWATER PUMPING STATION Pump room not physically separated from wet well; pumping of wastewater from a sanitary or combinedsewer system through closed pumps and pipes


A Entire space or room Division 1 NC

b B Division 2 NCLF

20 a

ODOR-CONTROL SYSTEM AREAS

Areas physically separated from wet well and housing systems handling wet well gases

Leakage and ignition of flammable gases

D Entire area if enclosed Division 2 NC

LF

b C, or outdoors

Areas within 0.9 m (3 ft) of leakage sources such as fans,dampers, flexible connections, flanges, pressurized unwelded ductwork, and odor-control vessels

Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

S

cAreas beyond 0.9 m (3 ft)

Unclassified

21 a

MAINTENANCE HOLES

Access to sewer for personnel entry


NNV Inside Division 1 In wit

b B Division 2

22 a

JUNCTION CHAMBERS

Structure where sewers intersect

Buildup of vapors fromflammable or combustible liquids

NNV Inside Division 1 In wit

b B

Open and above grade or inside and ventilated

Division 2

23INVERTED SIPHONS Depressed section of gravity sewer


NNVInterior of inlet and outlet structures

Division 1 NC

24

CATCH BASINS (Curb inlet) Inlet where street water enters a storm or combined sewer


NNV Enclosed space Division 1 In

wit

25 a

RESIDENTIAL DIVERSION STRUCTURES

Enclosed structures where residential wastewater can bediverted



wit

b B Unclassified

26 a

RESIDENTIAL BELOWGRADE VALVE VAULT

With an exposed residential wastewater surface

Possible ignition ofgases and floating flammable liquids


wit



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

Sb B Unclassified

27 a

RESIDENTIAL CONTROL STRUCTURES Enclosed structures where residential wastewater flow is regulated


A Enclosed space Division 2 In

wit

b B Unclassified

28 a

RESIDENTIAL BELOWGRADE METERING VAULT

With an exposed residential wastewater surface



wit

b B Unclassified

29 a

DIVERSION STRUCTURES

Enclosed structures where wastewater can be diverted



wit

b B Division 2

30

ABOVEGRADE VALVE VAULT

Physically separated from the wet well; valves in vault in closed piping system

NA NR NA Unclassified NCLF

31 a

BELOWGRADE VALVE VAULT

Physically separated from the wet well and with closed pipingsystem


NNV Enclosed space Division 2 NC

LF

b C Unclassified

32 a

BELOWGRADE VALVE VAULT

With an exposed wastewater surface

Possible ignition ofgases and floating flammable liquids


b B Division 2 NCLF



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area



MCofo

S

33 a

CONTROL STRUCTURES

Enclosed structures where wastewater or storm water flow isregulated


A Enclosed space Division 1 In

wit

b B Division 2

34 a

WASTEWATER HOLDING BASINS Enclosed structures temporarily holding untreated or partially treated wastewater


A Enclosed space Division 1 NC

b B Division 2 NCLF

35

WASTEWATER HOLDING BASINS, LINED OR UNLINED Open structuresholding storm water, combined wastewater, untreated or partially treated wastewater

NR NR NR NR NR

36 a

BELOWGRADE METERING VAULT Physically separated from the wet well and with closed piping system



LF

b C Unclassified

37 a

BELOWGRADE METERING VAULT

With an exposed wastewater surface



b B Division 2 NCLF

38

COARSE AND FINE SCREEN FACILITIES (See Coarse and Fine Screen Facilities inTable 5.2.)

Notes:



(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the space, and, therefore, Table 9.1.1.4 also has no requirements.

(2) Row and Line columns are used to refer to specific figures in A.4.2 and specific requirements for each location and function.

(3) The following codes are used in this table:A: No ventilation or ventilated at less than 12 air changes per hour.

B: Continuously ventilated at 12 air changes per hour or in accordance with Chapter 9.1.2.

C: Continuously ventilated at six 6 air changes per hour or in accordance with Chapter 9.1.2.

CGD: Combustible gas detection system.

D: No ventilation or ventilated at less than six air changes per hour.

FDS: Fire detection system.

FE: Portable fire extinguisher.LC: Limited-combustible material.

LFS: Low flame spread material.

NA: Not applicable.

NC: Noncombustible material.

NEC: In accordance with NFPA 70.

NNV: Not normally ventilated.

NR: No requirement.

Additional Proposed Changes

File Name Description Approved820_Rainville_4_820-2008.pdf Cover Sheet


Per 9.1.1.4, ventilation requirements not addressed by Chapters 4, 5, and 6 shall meet the requirements of 9.1.1.4. If I correctly understand that the requirements of Section 9.3, Ventilation Criteria apply only to Table 9.1.1.4 then the only alternative requirements in Chapter 9 as implied by the current text "or in accordance with Chapter 9" in the Notes of Tables 4.2, 5.2, and 6.2(a) would appear to be Section 9.1.2. Proposed change will avoid confusion and misapplication of Section 9.3 to the requirements of Table 4.2, 5.2, and 6.2(a).


Submitter Full Name: Charles RainvilleOrganization: Hallam-ICSStreet Address: City:State: Zip: Submittal Date: Tue Feb 19 11:36:10 EST 2013




I, Charles Rainville, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. Ihereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am Charles Rainville, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




4.2* Design and Construction.The design and construction of collection system facilities shall conform to Table4.2, which summarizes the various components associated with wastewatercollection and transport systems.Table 4.2 Collection Systems



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical


MateriaConstrufor Build

orStructu

1

MATERIALS USED IN REHABILITATION, RECONSTRUCTION,OR SLIP-LINING OF SEWERS

NA NA NA NA In accordwith 8.3.1

2

INDUSTRIAL SEWER Sewer transporting industrialwastewater only (no sanitary wastewater)

Not included within the scope of this standard

3

STORM SEWER Sewer transporting storm water only (no sanitary wastewater)


NNV Inside of sewer Division 2 In accord

with 8.3.1

4

STORM WATER PUMPING STATION WET WELLS Liquid side of pumping station serving only a storm sewer system


NNV Entire room or space Division 2 NC, LC, o

LFS

5a

STORM WATER PUMPING STATION DRY WELLS Dry side of a pumping station serving only a storm sewer system andphysically separated from wet well

Buildup of vapors from flammable orcombustible liquids

D Entire dry well

Division 2, or unclassified, if space providedwith pressurization in accordance with NFPA 496

NC, LC, oLFS

b C Unclassified

6

PRESSURE SEWER (Force main) Sewer under pressure(flooded discharge pipe from pump or tank)


7



8

INDIVIDUAL RESIDENTIAL SEWER Sewer serving one but not more than five dwellings


Unclassified NR



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu

9

INDIVIDUAL RESIDENTIAL PUMPING UNITS Pumping units serving one but not more than five dwellings (e.g.,grinder pumps, septic tank effluent pumps, ejector pumps)


Unclassified NR

10

a RESIDENTIAL SEWER Sewer transporting primarily residential wastewater

Possible ignition of flammable gases and floating flammable liquids

NNVWithin enclosed space

Division 2In accordwith 8.3.1

b B Unclassified

11 a

RESIDENTIAL WASTEWATER PUMPING STATION WET WELL Pumping station transporting primarily residential wastewater

Possibleignition of flammable gases and floating flammable liquids

A Entire room or space Division 2 NC, LC, o

LFS

b B Unclassified

12 a

RESIDENTIAL WASTEWATER PUMPING STATION DRY WELL Dry side of a pumping station transporting primarily residentialwastewater


D Entire room or space Division 2 NC, LC, o

LFS

b C Unclassified

13


NA NNV NA Unclassified NR

14 a

SANITARY SEWER Sewer transporting domestic,commercial, and industrial wastewater



with 8.3.1

b B Division 2



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu

15 a

COMBINED SEWER Sewer transporting domestic,commercial, and industrial wastewater and storm water



with 8.3.1

b B Division 2

16 a

WASTEWATER PUMPING STATION WET WELLS Liquid side of a pumping station serving a sanitary sewer or combined system

Possible ignition of flammable gases andfloating flammable liquids

A Entire room or space Division 1 NC, LC, o

LFS

b B Division 2

17 a

BELOWGRADE OR PARTIALLY BELOWGRADE WASTEWATERPUMPING STATION DRY WELL Pump room physically separated from wet well; pumping of wastewater from a sanitary or combined sewer system through closed pumps and pipes


C Entire space or room Unclassified NC, LC, o

LFS

b D

Division 2, or unclassified, if space providedwith pressurization in accordance with NFPA 496

18

ABOVEGRADE WASTEWATER PUMPING STATION Pump roomphysically separated with no personnel access to wet well; pumping ofwastewater from a sanitary or combined sewer system through closed pumps and pipes

NA NR NA Unclassified NC, LC, oLFS



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu

19 a

ABOVEGRADE WASTEWATER PUMPING STATION Pump room not physically separated from wet well; pumping of wastewater from asanitary or combined sewer system through closed pumps and pipes


A Entire space or room Division 1 NC

b B Division 2 NC, LC, oLFS

20 a

ODOR-CONTROL SYSTEM AREAS Areas physically separated from wet well and housing systems handling wet well gases


D Entire area if enclosed Division 2 NC, LC, o

LFS

b C, or outdoors

Areas within 0.9 m (3 ft) of leakage sourcessuch as fans, dampers, flexible connections, flanges, pressurized unweldedductwork, and odor-control vessels

Division 2


Unclassified

21 a

MAINTENANCE HOLES Access to sewer for personnel entry


NNV Inside Division 1 In accordwith 8.3.1

b B Division 2



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu

22 a

JUNCTION CHAMBERS Structure where sewers intersect


NNV Inside Division 1 In accordwith 8.3.1

b B

Open and above grade or inside andventilated

Division 2

23

INVERTED SIPHONS Depressed section of gravitysewer

Possible ignition of flammable gases andfloating flammable liquids

NNV

Interior of inlet and outlet structures

Division 1 NC

24


Buildup of vapors from flammable or combustibleliquids

NNV Enclosed space Division 1 In accord

with 8.3.1

25 a

RESIDENTIAL DIVERSION STRUCTURES Enclosed structures where residential wastewater can bediverted



with Cha

b B Unclassified

26 a

RESIDENTIAL BELOWGRADE VALVE VAULT With an exposed residential wastewater surface

Possibleignition of gases and floating flammable liquids


with 8.3.1

b B Unclassified

27 a



A Enclosed space Division 2 In accord

with Cha

b B Unclassified



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu

28 a

RESIDENTIAL BELOWGRADE METERING VAULT With an exposed residential wastewater surface



with 8.3.1

b B Unclassified

29 a

DIVERSION STRUCTURES Enclosed structures where wastewater can be diverted



with Cha

b B Division 2

30

ABOVEGRADE VALVE VAULT Physically separated from the wet well; valves in vault in closed piping system

NA NR NA Unclassified NC, LC, oLFS

31 a

BELOWGRADE VALVE VAULT Physically separated from the wet well and with closed pipingsystem


NNV Enclosed space Division 2 NC, LC, o

LFS

b C Unclassified

32 a

BELOWGRADE VALVE VAULT With an exposed wastewater surface

Possibleignition of gases and floating flammable liquids



33 a

CONTROL STRUCTURES Enclosed structures where wastewater or storm water flow isregulated


A Enclosed space Division 1 In accord

with Cha

b B Division 2

34 a

WASTEWATER HOLDING BASINS Enclosed structurestemporarily holding untreated or partially treated wastewater


A Enclosed space Division 1 NC



Row LineLocation

and Function

Fire and Explosion

HazardVentilation


Area

NEC-Area Electrical



orStructu


35

WASTEWATER HOLDING BASINS, LINED OR UNLINED Open structures holding storm water, combined wastewater, untreated or partially treated wastewater

NR NR NR NR NR

36 a

BELOWGRADE METERING VAULT Physically separatedfrom the wet well and with closed piping system


NNV Enclosed space Division 2 NC, LC, o

LFS

b C Unclassified

37 a

BELOWGRADE METERING VAULT With an exposed wastewater surface




38

COARSE AND FINE SCREEN FACILITIES (See Coarse and Fine Screen Facilities in Table 5.2.)

Notes:


(2) Row and Line columns are used to refer to specific figures in A.4.2 and specific requirements for each location and function.

(3) The following codes are used in this table:

A: No ventilation or ventilated at less than 12 air changes per hour.B: Continuously ventilated at 12 changes per hour or in accordance with Chapter

9.

C: Continuously ventilated at six air changes per hour or in accordance with Chapter 9.






FE: Portable fire extinguisher.

LC: Limited-combustible material.


NA: Not applicable.

NC: Noncombustible material.NEC: In accordance with NFPA 70.


NR: No requirement.


Table 4.2 Row 8. This is confussing. Chance to: Individual Residentila Sewer Sewer serving one or more individual residences with a total daily flow of not more than 500 gallons per day (gpd).

Table 4.2 Row 9. This is confussing. Change to: Individual Residential Pumping Units Pumping units that serving one or more individual residneces with a total daily flow of not more than 500 gallons per day (gpd).


Submitter Full Name: James WheelerOrganization: US Environmental Protection AgStreet Address: City: State:Zip: Submittal Date: Mon Jul 08 09:03:53 EDT 2013







5.2 * Design and Construction.The design and construction of liquid stream treatment processes shall conform to Table 5.2.Table 5.2 Liquid Stream Treatment Processes



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification

(All Class I, Group D) 4

1 a

COARSE AND FINE SCREEN FACILITIES

Removal of screenings from raw wastewater


A Enclosed—entire space Division 1

b B Division 2

cNotenclosed, open to atmosphere

Within a 3 m (10 ft) envelope around equipment and open channel

2

PUMPINGSTATIONS

(See Collection Systems, Table 4.2.)

3 a

FLOWEQUALIZATION TANKS

Storage of raw or partially treated wastewater



b B Division 2


Within a 3 m (10 ft) envelope around equipment and open channel 2,3

4 a

GRIT REMOVAL TANKS

Separation of grit from raw wastewater



b B Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification




5 a

PRE-AERATIONTANKS

Conditioning of wastewater prior to further treatment



b B Division 2



6 a

PRIMARYSEDIMENTATION TANKS

Separation of floating or settleable solids from raw wastewater



b B Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification



Interior of the tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank andextending 0.46 m (18 in.) beyond the exterior wall; envelope 0.46 m (18in.) above grade extending 3 m (10 ft) horizontally from the exterior tankwalls

7

AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBIC SUSPENDED GROWTH SYSTEMS,SEQUENCING BATCH REACTORS Aerobic treatment of wastewater open to the atmosphere

NA NR

Classified (see Primary Sedimentation)

Unclassified if process is preceded by primary sedimentation



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


8 a

ENCLOSEDAERATION BASIN, AEROBIC OR SUSPENDED GROWTH SYSTEMS, MEMBRANE BIOLOGICALREACTORS

Aerobic treatment not preceded by primary treatment

Possibleignition of flammable gases or floating flammable liquids

A (Interior of tank)

Entireenclosed space or tank of system

Division 1

Exterior of enclosed space or tank, installed in a building

Division 2

Exterior of enclosed space or tank, installed outdoors; envelope 0.46 m (18 in.)surrounding tank

Division 2

b

B (Interior of tank maintained at negative pressure)


Division 2


Unclassified

Exterior of enclosed space or tank, installed outdoors

Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification



Interior of tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending0.46 m (18 in.) beyond exterior wall; envelope 0.46 m (18 in.) above grade and extending 3 m (10 ft) horizontally from the exterior tankwalls

Division 2

d

RESIDENTIALENCLOSED AERATION BASIN, AEROBIC OR SUSPENDED GROWTH SYSTEMS, MEMBRANEBIOLOGICAL REACTORS

Aerobic treatment not preceded by primary treatment, serving one but not more than five dwellings




Division 2


Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


Exterior of enclosed space or tank, installedoutdoors

Unclassified

9


Aerobic treatment of wastewater preceded by primary treatment

NA NREntireenclosed space

Unclassified

10

TRICKLINGFILTER, BIO-TOWER, AEROBIC FIXED-FILM SYSTEMS

Aerobic biological treatment of wastewater

Not normally a significant hazard; however, these processes might containmaterials that are combustible under certain conditions

NR NA


Unclassified if unit process is preceded by primary sedimentation.

11 a

ANAEROBICTOWERS, ANAEROBIC FIXED-FILM SYSTEM

Anaerobic biological treatment if sealed from atmosphere

Normallyproduces combustible gas as treatment process by-product

NA Tank interior Division 1

b3 m (10 ft) envelope around tank

Division 2

12 a

GAS-HANDLINGSYSTEMS FOR LIQUID TREATMENT PROCESSES

Combustiblegas, often under pressure




Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


b B Division 2

c

Notenclosed, open to atmosphere

Within a 3 m (10 ft) envelope around equipment 2

13

OXYGENAERATION TANKS

Tanks for aerobic treatment of wastewater using high-purity oxygen rather than air

Ignition of flammable gases and floating flammable liquids in an oxygen-

enriched environment

NA Enclosedspace

Division 2 (If unitprocess is not preceded by primary sedimentation, see PrimarySedimentation Tanks in Table 5.2 for classification.)

14

INTERMEDIATE,SECONDARY, OR TERTIARY SEDIMENTATION TANKS

Separate floating and settleable solids from wastewater at various treatment stages

NA NR NA



15

FLASH MIXER OR FLOCCULATION TANKS

Tanks for mixing various treatment chemicals with wastewater

NA NR NA



16

NITRIFICATIONAND DENITRIFICATION TANKS

Tertiary treatment of wastewater to reduce or remove nitrogen

NA NR NA





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


17

BREAKPOINTCHLORINATION TANKS AND CHLORINE CONTACT TANKS

Application of chlorine in aqueous solution to wastewater

NA NR NA Unclassified

18AMMONIASTRIPPING TOWERS

(SeeTrickling Filter in Table 5.2.)

NA NA Unclassified

19

INTERMEDIATEOR FINAL PUMPING STATIONS

Pump(s) at intermediate stage or end of the treatment process


20

GRAVITY AND PRESSURE FILTERS

Filtering of treated wastewater through sand or other media


21

CARBON COLUMN OR TANKS

Vessels containing carbon for tertiary treatment of wastewater

Significanthazard from combustible carbon material

NA NA Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


22

ON-SITE OZONE GENERATION SYSTEM AND OZONE CONTACT TANKS

Ozone generation and purification for disinfection of wastewater

Similar to oxygen generation with addition of being highly corrosive(see Table D.1.1)

NA NA Not covered in this standard

23

BACKWASHWATER AND WASTE BACKWASH WATER HOLDING TANKS

Tanks for temporary storage of backwash water

NA NA NA Unclassified

24

ULTRAVIOLETDISINFECTION UNIT

Disinfection of wastewater effluent by ultraviolet radiation


25

EFFLUENTSTRUCTURES

Various structures conveying treated wastewater away from treatment processes


26 a

ODOR-CONTROLSYSTEM AREAS

Areas physically separated from processes that house systems handling leakage and ignition of process gases and vapors


D Entire area if enclosed Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


b C

Areas within 0.9 m (3 ft) of leakage sources such as fans, dampers, flexibleconnections, flanges, pressurized unwelded ductwork, and odor-controlvessels

Division 2

cAreasbeyond 0.9 m (3 ft)

Unclassified

d

Not enclosed, open to atmosphere

Areas within 0.9 m (3 ft) of leakage sources such as fans, dampers, flexible connections, flanges, pressurized unweldedductwork, and odor-control vessels

Division 2

eAreas beyond 0.9 m (3 ft)

Unclassified

f

Odor control systems for processes that do not generate flammable concentrations of gases or vapors


Notes:


(2) Row and Line columns are used to refer to Figure A.5.2 and specific requirements for each location and function.




A: No ventilation or ventilated at less than 12 air changes per hour.

B: Continuously ventilated at 12 changes per hour or in accordance with Chapter 9.


CGD: Combustible gas detection system.D: No ventilation or ventilated at less than six air changes per hour.


H: Hydrant protection in accordance with 7.2.4.



NA: Not applicable.



NR: No requirement.Footnotes:1Open channels and open structures upstream from the unit processes are classified the same as the downstream processes they supply.2The area beyond the envelope is unclassified.3Where liquid turbulence is not induced by aeration or other factors, the following criteria apply: (1) interior of the tank from the minimum operating water surface to the top of the tank wall; (2) envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond the exterior wall; (3) envelope 0.46 m (18 in.) above grade extending 3 m (10 ft) horizontally from the exterior tank walls.4These unit processes use corrosive chemicals that can have a deteriorating effect on conductors and equipment. Electrical equipment shall be identified for use in the operating environment.


Table 5.2 Row 26Odor control systems may be located outdoors. Line a addresses systems that are enclosed, and it is not clear if line b and c apply only to enclosed systems. The recommendation is to add lines to specifically address outdoor systems. The recommendation is for Division 2 within 3 ft of leakage sources, consistent with existing line b and c.Odor control systems may be connected to processes that do not generate flammable concentrations of gases or vapors, such as aeration tanks or dewatering. Row 26 does not appear to apply to these systems as the descriptions in Row 26 imply that it only applies to systems where ignition of process gases is a hazard. The recommendation is to specifically list that electrical classification is not required for systems where flammable gases of vapors are not generated.




Submitter Full Name: TOM BURGESSOrganization: ARCADISStreet Address: City:State: Zip: Submittal Date: Sun Mar 10 11:53:09 EDT 2013


I, TOM BURGESS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement ofProblem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am TOM BURGESS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




5.2 * Design and Construction.The design and construction of liquid stream treatment processes shall conform to Table 5.2.Table 5.2 Liquid Stream Treatment Processes



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


1 a





b B Division 2


Within a 3 m (10 ft) envelope around equipment and open channel

2

PUMPINGSTATIONS


3 a

FLOWEQUALIZATION TANKS




b B Division 2



4 a

GRIT REMOVAL TANKS




b B Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification




5 a

PRE-AERATIONTANKS




b B Division 2



6 a

PRIMARYSEDIMENTATION TANKS

Separation of floating or settleable solids from raw wastewater



b B Division 2



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification



Interior of the tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank andextending 0.46 m (18 in.) beyond the exterior wall; envelope 0.46 m (18in.) above grade extending 3 m (10 ft) horizontally from the exterior tankwalls

7

AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBIC SUSPENDED GROWTH SYSTEMS,SEQUENCING BATCH REACTORS Aerobic treatment of wastewater open to the atmosphere

NA NR





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


8 a






Division 1


Division 2

Exterior of enclosed space or tank, installed outdoors; envelope 0.46 m (18 in.)surrounding tank

Division 2

b

B (Interior of tank maintained at negative pressure)


Division 2


Unclassified


Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification



Interior of tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending0.46 m (18 in.) beyond exterior wall; envelope 0.46 m (18 in.) above grade and extending 3 m (10 ft) horizontally from the exterior tankwalls

Division 2

d

RESIDENTIALENCLOSED AERATION BASIN, AEROBIC OR SUSPENDED GROWTH SYSTEMS, MEMBRANEBIOLOGICAL REACTORS





Division 2


Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


Exterior of enclosed space or tank, installedoutdoors

Unclassified

9



NA NREntireenclosed space

Unclassified

10

TRICKLINGFILTER, BIO-TOWER, AEROBIC FIXED-FILM SYSTEMS


Not normally a significant hazard; however, these processes might containmaterials that are combustible under certain conditions

NR NA



11 a

ANAEROBICTOWERS, ANAEROBIC FIXED-FILM SYSTEM


Normallyproduces combustible gas as treatment process by-product

NA Tank interior Division 1


Division 2

12 a

GAS-HANDLINGSYSTEMS FOR LIQUID TREATMENT PROCESSES

Combustiblegas, often under pressure




Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


b B Division 2

c


Within a 3 m (10 ft) envelope around equipment 2

13

OXYGENAERATION TANKS

Tanks for aerobic treatment of wastewater using high-purity oxygen rather than air



NA Enclosedspace

Division 2 (If unitprocess is not preceded by primary sedimentation, see PrimarySedimentation Tanks in Table 5.2 for classification.)

14

INTERMEDIATE,SECONDARY, OR TERTIARY SEDIMENTATION TANKS


NA NR NA



15



NA NR NA



16

NITRIFICATIONAND DENITRIFICATION TANKS


NA NR NA





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


17

BREAKPOINTCHLORINATION TANKS AND CHLORINE CONTACT TANKS



18AMMONIASTRIPPING TOWERS

(SeeTrickling Filter in Table 5.2.)

NA NA Unclassified

19

INTERMEDIATEOR FINAL PUMPING STATIONS



20




21



Significanthazard from combustible carbon material

NA NA Unclassified



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area 1

NEC -AreaElectrical

Classification


22


Ozone generation and purification for disinfection of wastewater

Similar to oxygen generation with addition of being highly corrosive(see Table D.1.1)

NA NA Not covered in this standard

23

BACKWASHWATER AND WASTE BACKWASH WATER HOLDING TANKS



24

ULTRAVIOLETDISINFECTION UNIT



25

EFFLUENTSTRUCTURES

Various structures conveying treated wastewater away from treatment processes


26 a

ODOR-CONTROLSYSTEM AREAS

Areas physically separated from processes that house systems handling

leakage exhaust gases from those processes

Leakage and ignition of process gases and vapors




DEntirearea if enclosed

Division2

NC,LC, or LFS

CGD,FDS, and FE

b C

Areas within 0.9 m (3 ft) of leakage sources such as fans, dampers, flexibleconnections, flanges, pressurized unwelded ductwork, and odor-control vessels

Division 2

c Areas beyond 0.9 m (3 ft) Unclassified

Notes:


(2) Row and Line columns are used to refer to Figure A.5.2 and specific requirements for each location and function.(3) The following codes are used in this table:







H: Hydrant protection in accordance with 7.2.4.LC: Limited-combustible material.


NA: Not applicable.



NR: No requirement.

Footnotes:1Open channels and open structures upstream from the unit processes are classified the same as the downstream processes they supply.2The area beyond the envelope is unclassified.3Where liquid turbulence is not induced by aeration or other factors, the following criteria apply: (1) interior of the tank from the minimum operating water surface to the top of the tank wall; (2) envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond the exterior wall; (3) envelope 0.46 m (18 in.) above grade extending 3 m (10 ft) horizontally from the exterior tank walls.4These unit processes use corrosive chemicals that can have a deteriorating effect on conductors and equipment. Electrical equipment shall be identified for use in the operating environment.




The changes are better descriptors for the "Location and Function" and the "Fire and Explosion Hazard" columns.


Submitter Full Name: RALPH THOMASOrganization: METRO COUNCIL ENVIROMENTAL SVCStreet Address: City: State:Zip: Submittal Date: Tue May 14 15:49:43 EDT 2013


I, RALPH THOMAS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am RALPH THOMAS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




5.2* Design and Construction. The design and construction of liquid stream treatment processes shall conform to Table 5.2.Table 5.2 Liquid Stream Treatment Processes



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification

(All Class I, Group D)4

MaConfor

St

1 a




A Enclosed—entire space Division 1 NC

b B Division 2 NC, LFS

cNot enclosed, open to atmosphere

Within a 3 m (10 ft) envelope around equipment and openchannel

2

PUMPING STATIONS


3 a

FLOW EQUALIZATION TANKS






Within a 3 m (10 ft) envelope around equipment and openchannel2,3

4 a

GRIT REMOVAL TANKS







Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

c



5 a

PRE-AERATION TANKS





c



6 a

PRIMARY SEDIMENTATION TANKS

Separation of floating or settleable solids from rawwastewater






Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St


Interior of the tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond the exterior wall; envelope 0.46 m (18 in.) above grade extending 3 m (10 ft) horizontally from theexterior tank walls

7

AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBICSUSPENDED GROWTH SYSTEMS, SEQUENCING BATCH REACTORS Aerobic treatment of wastewater open to the atmosphere

NA NR



NR



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

8 a

ENCLOSED AERATION BASIN, AEROBIC OR SUSPENDED GROWTH SYSTEMS,MEMBRANE BIOLOGICAL REACTORS


Possible ignition offlammable gases or floating flammable liquids

A (Interior oftank)

Entire enclosed space or tank of system

Division 1 NC

Exterior of enclosed space or tank, installed in abuilding

Division 2 NC, LFS

Exterior of enclosed space or tank, installed outdoors;envelope 0.46 m (18 in.) surrounding tank

Division 2 NC, LFS

b

B (Interior of tankmaintained at negative pressure)


Division 2 NC, LFS


Unclassified NC, LFS





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

c


Interior of tank from the minimum operating water surface tothe top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond exterior wall; envelope 0.46 m (18 in.) above grade and extending 3 m (10 ft) horizontally from theexterior tank walls

Division 2 NC, LFS

d

RESIDENTIAL ENCLOSED AERATION BASIN, AEROBIC OR SUSPENDEDGROWTH SYSTEMS, MEMBRANE BIOLOGICAL REACTORS


Possible ignition of flammable gases or floating flammableliquids



Division 2 NC





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St



9



NA NREntire enclosed space


10

TRICKLING FILTER, BIO-TOWER, AEROBIC FIXED-FILM SYSTEMS


Not normally a significant hazard; however, these processesmight contain materials that are combustible under certainconditions

NR NA


Unclassified if unit process is preceded by primarysedimentation.

NR

11 a

ANAEROBIC TOWERS, ANAEROBIC FIXED-FILM SYSTEM


Normally producescombustible gas as treatment process by-product

NA Tank interior Division 1 NC


Division 2 NC, LFS



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

12 a

GAS-HANDLING SYSTEMS FOR LIQUID TREATMENT PROCESSES

Combustible gas, oftenunder pressure




Within a 3 m (10 ft) envelope around equipment2

13

OXYGEN AERATION TANKS

Tanks for aerobic treatment of wastewater using high-purity oxygenrather than air



NA Enclosed space

Division 2 (If unit process is not preceded by primarysedimentation, see Primary Sedimentation Tanks in Table 5.2 forclassification.)

Any equimatethe rspacsafe expovolathydrin an

enricatmo

14

INTERMEDIATE, SECONDARY, OR TERTIARY SEDIMENTATION TANKS


NA NR NA



NR

15



NA NR NA



NR



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

16

NITRIFICATION AND DENITRIFICATION TANKS


NA NR NA



NR

17

BREAKPOINT CHLORINATION TANKS AND CHLORINE CONTACT TANKS



NR (unit use chemrequuse omateconsSpecconsshallto thmatecons

18AMMONIA STRIPPING TOWERS

(See Trickling Filter in Table 5.2.)

NA NA Unclassified

NR (unit use chemSpecconsshallto thmatecons

19

INTERMEDIATE OR FINAL PUMPING STATIONS


NA NR NA Unclassified NR

20






Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

21



Significant hazard from combustible carbon material

NA NA Unclassified NR

22


Ozone generation and purification for disinfection ofwastewater

Similar to oxygen generation with addition of being highlycorrosive (see Table D.1.1)

NA NA Not covered in this standard NR

23

BACKWASH WATER AND WASTE BACKWASH WATER HOLDING TANKS


NA NA NA Unclassified NR

24

ULTRAVIOLET DISINFECTION UNIT



25

EFFLUENT STRUCTURES

Various structures conveying treated wastewater away from treatmentprocesses




Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

26 a


Areas physically separated from processes that house systemshandling leakage and ignition of process gases and vapors

Leakage and ignition offlammable gases

D Entire area if enclosed Division 2 NC,

LFS

b C


Division 2


Unclassified

Notes:(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the space, and, therefore, Table 9.1.1.4 also has no requirements.














NA: Not applicable.














5.2* Design and Construction.The design and construction of liquid stream treatment processes shall conform to Table 5.2.Table 5.2 Liquid Stream Treatment Processes



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

1 a







Within a 3 m (10 ft) envelope around equipment and openchannel

2

PUMPING STATIONS


3 a

FLOW EQUALIZATION TANKS







4 a

GRIT REMOVAL TANKS







Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

c



5 a

PRE-AERATION TANKS





c



6 a

PRIMARY SEDIMENTATION TANKS

Separation of floating or settleable solids from rawwastewater






Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St


Interior of the tank from the minimum operating water surface to the top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond the exterior wall; envelope 0.46 m (18 in.) above grade extending 3 m (10 ft) horizontally from theexterior tank walls

7

AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBICSUSPENDED GROWTH SYSTEMS, SEQUENCING BATCH REACTORS Aerobic treatment of wastewater open to the atmosphere

NA NR



NR



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

8 a



Possible ignition offlammable gases or floating flammable liquids

A (Interior oftank)


Division 1 NC


Division 2 NC, LFS

Exterior of enclosed space or tank, installed outdoors;envelope 0.46 m (18 in.) surrounding tank

Division 2 NC, LFS

b

B (Interior of tankmaintained at negative pressure)


Division 2 NC, LFS







Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

c


Interior of tank from the minimum operating water surface tothe top of the tank wall; envelope 0.46 m (18 in.) above the top of the tank and extending 0.46 m (18 in.) beyond exterior wall; envelope 0.46 m (18 in.) above grade and extending 3 m (10 ft) horizontally from theexterior tank walls

Division 2 NC, LFS

d

RESIDENTIAL ENCLOSED AERATION BASIN, AEROBIC OR SUSPENDEDGROWTH SYSTEMS, MEMBRANE BIOLOGICAL REACTORS


Possible ignition of flammable gases or floating flammableliquids



Division 2 NC





Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St



9



NA NREntire enclosed space


10

TRICKLING FILTER, BIO-TOWER, AEROBIC FIXED-FILM SYSTEMS


Not normally a significant hazard; however, these processesmight contain materials that are combustible under certainconditions

NR NA



NR

11 a

ANAEROBIC TOWERS, ANAEROBIC FIXED-FILM SYSTEM


Normally producescombustible gas as treatment process by-product

NA Tank interior Division 1 NC


Division 2 NC, LFS



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

12 a

GAS-HANDLING SYSTEMS FOR LIQUID TREATMENT PROCESSES

Combustible gas, oftenunder pressure




Within a 3 m (10 ft) envelope around equipment2

13

OXYGEN AERATION TANKS

Tanks for aerobic treatment of wastewater using high-purity oxygenrather than air



NA Enclosed space

Division 2 (If unit process is not preceded by primarysedimentation, see Primary Sedimentation Tanks in Table 5.2 forclassification.)

Any equimatethe rspacsafe expovolathydrin an

enricatmo

14

INTERMEDIATE, SECONDARY, OR TERTIARY SEDIMENTATION TANKS


NA NR NA



NR

15



NA NR NA



NR



Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

16

NITRIFICATION AND DENITRIFICATION TANKS


NA NR NA



NR

17

BREAKPOINT CHLORINATION TANKS AND CHLORINE CONTACT TANKS



NR (unit use chemrequuse omateconsSpecconsshallto thmatecons

18AMMONIA STRIPPING TOWERS

(See Trickling Filter in Table 5.2.)

NA NA Unclassified

NR (unit use chemSpecconsshallto thmatecons

19

INTERMEDIATE OR FINAL PUMPING STATIONS



20






Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

21



Significant hazard from combustible carbon material

NA NA Unclassified NR

22


Ozone generation and purification for disinfection ofwastewater

Similar to oxygen generation with addition of being highlycorrosive (see Table D.1.1)

NA NA Not covered in this standard NR

23

BACKWASH WATER AND WASTE BACKWASH WATER HOLDING TANKS


NA NA NA Unclassified NR

24

ULTRAVIOLET DISINFECTION UNIT



25

EFFLUENT STRUCTURES

Various structures conveying treated wastewater away from treatmentprocesses




Row Line

Location

and

Function

Fire and Explosion

HazardVentilation


Area1


Classification


MaConfor

St

26 a


Areas physically separated from processes that house systemshandling leakage and ignition of process gases and vapors

Leakage and ignition offlammable gases

D Entire area if enclosed Division 2 NC,

LFS

b C


Division 2


Unclassified

Notes:(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the space, and, therefore, Table 9.1.1.4 also has no requirements.














NA: Not applicable.




Add a new row for both enclosed, and open control structures classified similarly to primary sedementation.


File Name Description Approved820_Harrell.pdf Cover Sheet


Wastewater treatment plants frequently have control structures; however, this is overlooked in Chapter 5. In plants, these structures can be open or enclosed; this is currently not addressed.


Submitter Full Name: John HarrellOrganization: Wilson & Company, Inc.Street Address: City: State:Zip: Submittal Date: Mon Mar 04 10:31:58 EST 2013




I, John Harrell, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am John Harrell, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




6.2* Design and Construction. Revise Table 6.2(a) Row 12 and add a new Row 13 (renumber subsequent Rows) as shown in the uploadeddocument.The design and construction of solids treatment processes shall conform to Table 6.2(a) and Table 6.2(b).

Table 6.2(a) was revised by a tentative interim amendment (TIA). See page 1.Table 6.2(a) Solids Treatment Processes



Row Line Location and Function

Fire and Explosion

HazardVentilation1,

3


Area


Classification(All Class I, Group D)3

1

COARSE AND FINE SCREENINGS-

HANDLING BUILDINGS

Storage, conveying, or dewatering of screenings (no exposed flow ofwastewater through building or area)


2

GRIT-HANDLING BUILDING

Storage, conveying, and dewatering of heavy small screenings andgrit (no exposed flow of wastewater through building or area)


3 a

SCUM-HANDLING BUILDING OR AREA

Holding, dewatering, or storage

Possible grease orflammable liquids carryover

A Enclosed space Division 2

b B Unclassified


NA

4 a SCUM PITS



b B Division 2




Fire and Explosion

HazardVentilation1,

3


Area




Within a 3 m (10 ft) envelope around equipment and open channel1

5 a

SCUM-PUMPING AREAS

Pumping of scum, wet side of pumping station

Carryover of floatingflammable liquids


b B Division 2



6 a

SCUM-PUMPING AREAS

Pumping of scum, dry side of pumping station

Not significant D Enclosed space Division 2

b C Unclassified


NA

7

SCUM INCINERATORS2

Elimination of scum throughburning

Firebox explosion from possible carryover of flammablescum

NRIncinerator area if separated from scum storage

Unclassified

8 a

SLUDGE THICKENER (CLARIFIER)

Sludge concentration and removal, gravity, or dissolved airflotation

Possible generation of methane from sludge; carryover offloating flammable liquids


b B Division 2




Fire and Explosion

HazardVentilation1,

3


Area




Envelope 0.46 m (18 in.) above water surface and

3 m (10 ft) horizontally from wetted walls1

9 a

SLUDGE PUMPING STATION DRY WELLS

Dry side of a sludge pumping station

Buildup of methane gasor flammable vapors

D

Entire dry well when physically separated from a wet well orseparate structures

Division 2

b C


Unclassified

10 a

SLUDGE STORAGE WET WELLS, PITS, AND HOLDING TANKS

Retaining of sludge

Possible generation of methane gas in explosive concentrations;carryover of floating flammable liquids


b B Division 2







Fire and Explosion

HazardVentilation1,

3


Area



11 a

SLUDGE-BLENDING TANKS AND HOLDING WELLS

Retaining of sludge with some agitation

Possible generation ofmethane gas in explosive concentrations; carryover of floating flammableliquids


b B Division 2




12

DEWATERING BUILDINGS CONTAINING CENTRIFUGES, GRAVITY BELTTHICKENERS, BELT AND VACUUM FILTERS, AND FILTER PRESSES

Removal of water from sludge and the conveyance of sludge cake

Accumulation of methane gas

C Entire room Unclassified

13 a

ENCLOSED SLUDGE CAKE STORAGE

Storage of dewatered sludge cake and conveyance of sludge cake



b



D Entire room Division 2




Fire and Explosion

HazardVentilation1,

3


Area



14

INCINERATORS2

AND INCINERATOR BUILDINGS

Conveying and burning of sludge cake

Firebox explosion NR NA Unclassified

15

HEAT TREATMENT UNITS, LOW- OR HIGH-PRESSURE OXIDATION UNITS

Closed oxidation of sludge

None, other than in high-pressure systems

NR NA Unclassified

16 a

ANAEROBIC DIGESTERS, BOTH FIXED ROOF AND FLOATING COVERGeneration of sludge gas from digesting sludge

Leakage of gas fromcover, piping, emergency relief valves, and appurtenances

Not enclosed, open toatmosphere

Tank interior; areas above and around digester cover; envelope 3 m (10 ft) above the highest point of cover, when cover is at its maximumelevation, and 1.5 m (5 ft) from any wall

Division 1

b

Envelope

4.6 m (15 ft) above Division 1 area over cover and

1.5 m (5 ft) beyond Division 1 area around tank walls

Division 2

c A

For digester tanks enclosed in a building: tank interior;entire area inside building

Division 1




Fire and Explosion

HazardVentilation1,

3


Area



d B

For digester tanks enclosed in a building: tank interior; areas above and around digester cover; envelope 3 m (10 ft) above highest point of cover, when cover is at its maximum elevation, and 1.5 m (5 ft) from any wall of digester tank

Division 1

eRemaining space in enclosed area

Division 2

17 a

ANAEROBIC DIGESTER CONTROL BUILDING

Storage, handling, or burning of sludge gas

Leaking and ignition ofsludge gas

A Entire building Division 1

b BEnclosed areas that contain gas-handling equipment

Division 2

c CPhysically separated from gas-handling equipment

Unclassified

18 a

DIGESTER GAS-PROCESSING ROOMS

Gas compression, handling, and processing

Sludge gasignition A Entire room Division 1

b B Division 2

c BWithin 1.5 m (5 ft) of equipment

Division 1




Fire and Explosion

HazardVentilation1,

3


Area



19

ANAEROBIC DIGESTER GAS STORAGE

Storage of sludge gas

Gas storage piping and handling

NNV

Within a 3 m (10 ft) envelope of tanks, valves, andappurtenances

Division 1

20 a

WASTE

GAS

BURNERS

Combusting excess gas

Gas piping and appurtenances NA

Within 3 m (10 ft) envelope of all fixtures, appurtenances, and housing

Division 1

b

Envelope

4.6 m (19 ft) above Division 1 envelope and 1.5 m (5 ft) on all sides

Division 2

21

CHLORINE OXIDATION UNITS

Chlorine reaction with sludge

Chlorine is a very strong oxidizing agent

NR NA Unclassified

22 a

UNDERGROUND (PIPING) TUNNELS CONTAINING NATURAL GAS PIPING ORSLUDGE GAS PIPING

Transmission of gas, sludge, water, air, and steam via piping; also might contain power cable and conduit

Ignition of natural gas or sludge gases

DWithin 3 m (10 ft) of valves and appurtenances

Division 1

b Entire tunnel Division 2




Fire and Explosion

HazardVentilation1,

3


Area



c C

Areas within 3 m (10 ft) of valves, meters, gas check valves,condensate traps, and other piping appurtenances

d Areas beyond 3 m (10 ft) Unclassified

23

UNDERGROUND (PIPING) TUNNELS NOT CONTAINING NATURAL GAS PIPING OR SLUDGE GAS PIPING

Transmission of sludge, water, air, and steam piping; also mightcontain power cable and conduit


24 a

COMPOSTING PILES

Aerobic sludge reduction

Liberation of ammonia and toxic gas (composting materials can self-ignite)

D Enclosed area Division 2

b C Unclassified

25 a

IN-VESSEL COMPOSTING



As required by process

If enclosed, interior of reactor vessel plus a 3 m (10 ft) envelope around reactor vessel

Division 2

b Areas beyond 3 m (10 ft) Unclassified

26 a

ODOR-CONTROL SYSTEM AREAS Areas physically separated fromprocesses that house systems handling flammable gases

Leakage and ignition ofprocess gases and vapors





Fire and Explosion

HazardVentilation1,

3


Area



b C

Areas within 0.9 m (3 ft) of leakage sources such as fans,dampers, flexible connections, flanges, pressurized unwelded ductwork, andodor-control vessels

Division 2


27

PUMPING OF DRAINAGE FROM DIGESTED SLUDGE-

DEWATERING PROCESSES

Pumping of centrate, filtrate, leachate, drying beds, and soforth


Notes:


(2) Row and Line columns are used to refer to the specific figures in A.6.2 and for specific requirements for each location and function.(3) The following codes are used in this table:


B: Continuously ventilated at 12 air changes per hour or in accordance with Chapter 9.




FAS: Fire alarm system.FDS: Fire detection system.




FSS: Fire suppression system (e.g., automatic sprinkler, water spray, foam, gaseous, or dry chemical).




NA: Not applicable.NC: Noncombustible material.



NR: No requirement.

Footnotes:1The area beyond the envelope is unclassified.2See NFPA 54, NFPA 82, and NFPA 85.3These unit processes use corrosive chemicals that can have a deteriorating effect on conductors and equipment. Electrical equipment shall be identified for use in the operating environment.

Table 6.2(b) Solids Treatment Processes — Sludge Drying




Fire and Explosion

HazardVentilation 1


Area


Classification (All Class II, Group G) 2

MCofor

S

1 aSLUDGE-DRYING PROCESSES 3

Potential for ignition of dust

NR

If exposed to combustible particulate solids, entire room 4

Division 1

NC(Coin awithNFPNFPNFPNFP

b NR

Areas within equipment processing combustible particulate solids

Division 1

c NR

Areas within 3 m (10 ft) of equipment processing combustible particulatesolids

Division 2

d NR

Areasbeyond 3 m (10 ft) of equipment processing combustible particulatesolids

Unclassified

2 a

DRIEDSLUDGE STORAGE AREAS, IF ENCLOSED


NR

If exposed to dried sludge, entire room 4

Division 1

NC(Coin awithandNFPNFP

b NRAreas within tanks storing dried sludge

Division 1

c NR

Areas within 3 m (10 ft) of tanks storing dried sludge

Division 2




Fire and Explosion

HazardVentilation 1


Area



MCofor

S

d NR

Areasbeyond 3 m (10 ft) of tanks storing dried sludge

Unclassified

Notes:

(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the space and, therefore, Table 9.1.1.4 also has no requirements.

(2) The following codes are used in this table:FAS: Fire alarm system.





NR: No requirement.

Footnotes:1For sludge-drying processes that use flammable or combustible liquids, ventilate in accordance with NFPA 30.2Or if acceptable to the authority having jurisdiction with classification in NFPA 499.3See NFPA 54, NFPA 85, NFPA 499, and NFPA 654. For sludge-drying processes that use flammable or combustible liquids, see NFPA 30.4The area beyond the envelope is unclassified.


File Name Description Approved820_Tb6.2_a_Log_1.docx Table 6.2(a) Row 12




Note: This Public Input originates from Tentative Interim Amendment 820-12-1 (TIA 1025) issued by the Standards Council on August 11, 2011.Table 6.2(a) Row 12 has been causing confusion to industry. This TIA seeks to eliminate confusion of this requirement and reduce compliance burdens. Justification for reducing from Class 1 Division 1: Wastewater treatment dewatering operations are one of the final stages of treatment and

have a reduced risk of fire or explosion hazards. Row 12 of Table 6.2(a) recognizes this reduced hazard and the operational area is “unclassified” in Line b. Additionally, stored dewatered sludge cake (a semi-solid product of sludge dewatering) has a reduced (but not entirely absent) risk of fire or explosion from an accumulation of methane gas. Classifying storage areas with dewatered sludge cake as a Class I Division 1 location

creates an unnecessary burden on plant operators in an area with a minimal risk for fire or explosion from the accumulation of methane gas. In addition, line “b” refers to the “conveyance of thickened sludge.” While this occurs in the actual dewatering area it does not typically occur in storage areas. Sludge thickening and storage operations are covered in Rows 8, 9, 10 and 11 and are appropriately classified in these Rows. Row 12 line b already considers the risk for the actual dewatering operation to be minimal as evidenced by the “unclassified” status of this operation when 6 air changes per hour (ACH) are provided for the location.Considering the reduced risk of methane gas during sludge cake storage this operation is

more appropriately classified as a Class I Division 2 location. It is recognized that the primary hazard in a sludge cake storage area is the accumulation and ignition of combustible dust. This hazard is addressed in Table 6.2(b) of NFPA 820. However, where different types of material — such as a flammable gas and a combustible dust — may exist in a process or location, the area must be classified as both a Class I and a Class II location, and protection must be provided for both hazards. Classification is necessary and appropriate for a sludge cake storage location; however, the classification must reflect the real and potential risk of flammable gas ignition and ensure a level of protection that mitigates the minimized risk in this location. While a reduced level of protection a designation of Class I Division 2 for sludge cake storage areas would accomplish this risk mitigation.As background, Class I, Division 2 locations, boxes, fittings, and joints are not required to

be explosionproof when they contain no arcing devices; or for lighting outlets or enclosures containing non-arcing devices (such as solid-state relays, solenoids, and control transformers), if the maximum operating temperature of any exposed surface does not exceed 80 percent of the ignition temperature. However, when a general-purpose enclosure is installed using rigid or intermediate metal

conduit, a bonding jumper with proper fittings or bonding-type locknuts is required to be used between the enclosure and the raceway to ensure adequate bonding from the hazardous area to the point of grounding at the service equipment or separately derived system. See 501.30 for grounding and bonding requirements.

Where necessary, limited flexibility is provided through use of flexible metal conduit, liquidtight flexible conduit, and extra-hard-usage flexible cord, and the fittings of this type are not required to be specifically approved for Class I locations. Also, where flexible conduit or liquidtight flexible conduit is used, internal or external bonding jumpers with proper fittings must be provided in accordance with 501.30(B), unless liquidtight flexible conduit is installed under the conditions described in 501.30(B), Exception. Section 501.10(B)(1) permits a variety of cable types, cable tray systems, enclosed

gasketed wireways, and enclosed gasketed busways, each with associated fittings. These are not required to be specifically listed or labeled for Class I, Division 2 locations. For example, if Type ITC or MC cable is used, neither the cable nor the fittings need to be listed for use in hazardous locations.Providing this electrical equipment installation flexibility is important to the design and

operation of wastewater treatment facilities, specifically sludge cake storage locations.Further editing was performed to clarify enclosed sludge cake storage areas and to

distinguish these areas from dewatering buildings. As a consequence, another line was added, now Row 13 Line a, which classifies enclosed sludge cake storage areas with type C ventilation as UNCLASSIFIED. Emergency Nature: Treating sludge storage as a Class 1 Division 1 electrical hazard is

considered to be an expensive and unnecessary requirement for wastewater treatment



facility designers and operators. Revising Row 12 of Table 6.2(a) helps remove confusion, while reducing to a hazard classification of Class 1 Division 2 which will adequately mitigate the risk of fire or explosion. A Div 2 classification is determined to provide adequate protection and more flexibility for designers and operators.


Submitter Full Name: TC on WAA-AAAOrganization: NFPAAffilliation: TC on Wasterwater Treatment PlantsStreet Address:City: State: Zip:Submittal Date: Wed Nov 14 10:09:10 EST 2012


I, TC on WAA-AAA, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement ofProblem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am TC on WAA-AAA, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




6.2 * Design and Construction.The design and construction of solids treatment processes shall conform to Table 6.2(a) and Table 6.2(b).

Table 6.2(a) was revised by a tentative interim amendment (TIA). See page1.Table 6.2(a) Solids Treatment Processes



Row LineLocation

and Function

Fire and Explosion

HazardVentilation 1,

3


Area

NEC -AreaElectrical

Classification (All Class I, Group D) 3

MatConsfor B

Stru

1


HANDLING BUILDINGS

Storage, conveying, or dewatering of screenings (no exposed flow of wastewater through building or area)

NA NR NA Unclassified NC, LLFS

2

GRIT-HANDLINGBUILDING

Storage, conveying, and dewatering of heavy small screenings and grit (no exposed flow of wastewater through building or area)

NA NR NA Unclassified NC, LLFS

3 a

SCUM-HANDLINGBUILDING OR AREA


Possiblegrease or flammable liquids carryover

A Enclosedspace Division 2 NC, L

LFS

b B Unclassified


NA

4 a SCUM PITS


AEnclosed—entire space

Division 1 NC



Row LineLocation

and Function

Fire and Explosion


3


Area

NEC -AreaElectrical


MatConsfor B

Stru

b B Division 2 NC, LLFS


Within a 3 m (10 ft) envelope around equipment and open channel 1

5 a

SCUM-PUMPINGAREAS


Carryover of floating flammable liquids


Division 1 NC

b B Division 2 NC, LLFS



6 a

SCUM-PUMPINGAREAS


Not significant



Leakage of flammable liquids

D Enclosed space Division 2 NC, LC, or LFS FE

b C Unclassified

c


NA

7

SCUMINCINERATORS 2

Elimination of scum through burning

Fireboxexplosion from possible carryover of flammable scum

NRIncineratorarea if separated from scum storage

Unclassified

8 a

SLUDGETHICKENER (CLARIFIER)

Sludge concentration and removal, gravity, or dissolved air flotation

Possiblegeneration of methane from sludge; carryover of floating flammableliquids


b B Division 2



3 m (10 ft) horizontally from wetted walls 1

9 a

SLUDGEPUMPING STATION DRY WELLS


Buildup of methane gas or flammable vapors

D

Entire dry well when physically separated from a wet well or separatestructures

Division 2

b C


Unclassified



10 a

SLUDGESTORAGE WET WELLS, PITS, AND HOLDING TANKS

Retaining of sludge

Possiblegeneration of methane gas in explosive concentrations; carryover offloating flammable liquids


b B Division 2




11 a

SLUDGE-BLENDINGTANKS AND HOLDING WELLS




b B Division 2




12

DEWATERINGBUILDINGS CONTAINING CENTRIFUGES, GRAVITY BELT THICKENERS, BELT AND VACUUMFILTERS, AND FILTER PRESSES


Accumulationof methane gas




13 a

ENCLOSEDSLUDGE CAKE STORAGE




b




14

INCINERATORS 2



Fireboxexplosion NR NA Unclassified

15

HEATTREATMENT UNITS, LOW- OR HIGH-PRESSURE OXIDATION UNITS



NR NA Unclassified

16 a

ANAEROBICDIGESTERS, BOTH FIXED ROOF AND FLOATING COVER Generation of sludge gas from digesting sludge

Leakage of gas from cover, piping, emergency relief valves, andappurtenances


Tank interior; areas above and around digester cover; envelope 3 m (10 ft) above the highest point of cover, when cover is at its maximum elevation, and 1.5 m (5 ft) from any wall

Division 1

b

Envelope



Division 2



c A

For digester tanks enclosed in a building: tank interior; entire area inside building

Division 1

d B


Division 1

eRemainingspace in enclosed area

Division 2

17 a

ANAEROBICDIGESTER CONTROL BUILDING


Leaking and ignition of sludge gas


b B

Enclosed areas that contain gas-handling equipment

Division 2

c CPhysicallyseparated from gas-handling equipment

Unclassified

18 a



Sludge gas ignition A Entire room Division 1

b B Division 2


Division 1



19

ANAEROBICDIGESTER GAS STORAGE



NNV

Within a 3 m (10 ft) envelope of tanks, valves, and appurtenances

Division 1

20 a

WASTE

GAS

BURNERS




Division 1

b

Envelope


Division 2

21

CHLORINEOXIDATION UNITS



NR NA Unclassified

tt

t

22 a

UNDERGROUND(PIPING) TUNNELS CONTAINING NATURAL GAS PIPING OR SLUDGE GAS PIPING



D

Within 3 m (10 ft) of valves and appurtenances

Division 1




c C

Areas within 3 m (10 ft) of valves, meters, gas check valves, condensate traps, and other piping appurtenances


23

UNDERGROUND(PIPING) TUNNELS NOT CONTAINING NATURAL GAS PIPING OR SLUDGE GAS PIPING

Transmission of sludge, water, air, and steam piping; also might contain power cable and conduit


24 a

COMPOSTINGPILES


Liberation of ammonia and toxic gas (composting materials canself-ignite)


b C Unclassified

25 a

IN-VESSELCOMPOSTING





Division 2


26 a

ODOR-CONTROLSYSTEM AREAS Areas physically separated from processes that house systemshandling flammable gases





b C


Division 2


27



Pumping of centrate, filtrate, leachate, drying beds, and so forth


Notes:


(2) Row and Line columns are used to refer to the specific figures in A.6.2 and for specific requirements for each location and function.







FAS: Fire alarm system.





LC: Limited-combustible material.LFS: Low flame spread material.



NA: Not applicable.




NR: No requirement.






Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S



NR


Division 1

NC(Cin witNFNFNFNF

b NR


Division 1

c NR


Division 2

d NR


Unclassified

2 aDRIED SLUDGE STORAGE AREAS, IF ENCLOSED


NR


Division 1

NC(Cin witanNFNF


Division 1

c NR


Division 2




Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S

d NR


Unclassified

Notes:







NR: No requirement.



Table 6.2(a) Row 6Recommend revising the fire and explosion hazard for consistency with the scum flammable liquid hazard listed in Row 4 and 5. The hazard would occur if there is leakage of scum containing flammable liquids.





Fire and Explosion


3


Area

NEC -ArElectrica

Classificat(All ClassGroup D) 3

1


HANDLING BUILDINGS



2




3 a




A Enclosedspace Division 2

b B Unclassified


NA

4 a SCUM PITS



b B Division 2




Fire and Explosion


3


Area

NEC -ArElectrica




5 a

SCUM-PUMPINGAREAS




b B Division 2



6 a

SCUM-PUMPINGAREAS


Not significant D Enclosedspace Division 2

b C Unclassified


NA

7

SCUMINCINERATORS 2




Unclassified

8 a





b B Division 2




Fire and Explosion


3


Area

NEC -ArElectrica





9 a




D


Division 2

b C


Unclassified

10 a


Retaining of sludge



b B Division 2







Fire and Explosion


3


Area

NEC -ArElectrica


11 a





b B Division 2




12





13 a





b







Fire and Explosion


3


Area

NEC -ArElectrica


14

INCINERATORS 2




15




NR NA Unclassified

16 a





Division 1

b

Envelope



Division 2

c A


Division 1




Fire and Explosion


3


Area

NEC -ArElectrica


d B


Division 1


Division 2

17 a






Division 2


Unclassified

18 a




b B Division 2


Division 1




Fire and Explosion


3


Area

NEC -ArElectrica


19




NNV


Division 1

20 a

WASTE

GAS

BURNERS




Division 1

b

Envelope


Division 2

21




NR NA Unclassified

22 a





Division 1





Fire and Explosion


3


Area

NEC -ArElectrica


c C



23




24 a

COMPOSTINGPILES




b C Unclassified

25 a

IN-VESSELCOMPOSTING





Division 2


26 a







Fire and Explosion


3


Area

NEC -ArElectrica


b C


Division 2


dNot enclosed, open toatmosphere

Areas within 0.9 m (3 ft) of leakage sources such as fans, dampers, flexible connections,flanges, pressurized unwelded ductwork, and odor-controlvessels

Division 2

e Areas beyond 0.9 m (3 ft) Unclassified

f

Odor control systemsconnected to processes that do not generate flammable concentrations ofgases or vapors





Fire and Explosion


3


Area

NEC -ArElectrica


27





Notes:

(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the space, and, therefore, Table 9.1.1.4 also has no requirements.(2) Row and Line columns are used to refer to the specific figures in A.6.2 and for specific requirements for each location and function.






D: No ventilation or ventilated at less than six air changes per hour.FAS: Fire alarm system.










NR: No requirement.

Footnotes:1The area beyond the envelope is unclassified.



2See NFPA 54, NFPA 82, and NFPA 85.3These unit processes use corrosive chemicals that can have a deteriorating effect on conductors and equipment. Electrical equipment shall be identified for use in the operating environment.





Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S



NR


Division 1

NC(Cin witNFNFNFNF

b NR


Division 1

c NR


Division 2

d NR


Unclassified



NR


Division 1

NC(Cin witanNFNF


Division 1

c NR


Division 2




Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S

d NR


Unclassified

Notes:







NR: No requirement.



Table 6.2(a) Row 26Odor control systems may be located outdoors. Line a addresses systems that are enclosed, and it is not clear if line b and c apply only to enclosed systems. The recommendation is to add lines to specifically address outdoor systems. The recommendation is for Division 2 within 3 ft of leakage sources, consistent with existing line b and c.Odor control systems may be connected to processes that do not generate flammable concentrations of gases or vapors, such as aeration tanks or dewatering. Row 26 does not appear to apply to these systems as the descriptions in Row 26 imply that it only applies to systems where ignition of process gases is a hazard. The recommendation is to specifically list that electrical classification is not required for systems where flammable gases of vapors are not generated.





Fire and Explosion


3


Area

NEC -AreaElectrical


Cf

1


HANDLING BUILDINGS


NA NR NA Unclassified NLF

2



NA NR NA Unclassified NLF

3 a




A Enclosedspace Division 2 N

LF

b B Unclassified


NA

4 a SCUM PITS



Division 1 N

b B Division 2 NLF




Fire and Explosion


3


Area

NEC -AreaElectrical


Cf



5 a

SCUM-PUMPINGAREAS




Division 1 N

b B Division 2 NLF



6 a

SCUM-PUMPINGAREAS


Notsignificant D Enclosed

space Division 2 NLF

b C Unclassified


NA

7

SCUMINCINERATORS 2



NR

Incineratorarea if separated from scum storage

Unclassified NLF

8 a



Possiblegeneration of methane from sludge;

carryover of floating flammable liquidsA Enclosed— entire space Division



12 NC

H, FE, and CGD if enclosedb B

Division 2



Unclassified NC, LC, or LFS




Division 2

9 a




D


Division 2

b C


Unclassifie

10 a


Retaining of sludge



b B Division 2




11 a





b B Division 2






12




C Entire room Unclassifie

13 a




C Entire room Unclassifie

b




14

INCINERATORS 2



Fireboxexplosion NR NA Unclassifie

15




NR NA Unclassifie



16 a





Division 1

b

Envelope



Division 2

c A


Division 1

d B


Division 1


Division 2



17 a





b B

Enclosed areas that contain gas-handling equipment

Division 2


Unclassifie

18 a




b B Division 2


Division 1

19




NNV


Division 1

20 a

WASTE

GAS

BURNERS




Division 1

b

Envelope


Division 2



21




NR NA Unclassifie

22 a





Division 1


c C


d Areas beyond 3 m (10 ft) Unclassifie

23



NA NR NA Unclassifie



24 a

COMPOSTINGPILES




b C Unclassifie

25 a

IN-VESSELCOMPOSTING





Division 2

b Areas beyond 3 m (10 ft) Unclassifie

26 a




b C


Division 2

c Areas beyond 0.9 m (3 ft) Unclassifie

27




NA NR NA Unclassifie

Notes:











FDS: Fire detection system.FE: Portable fire extinguisher.





NA: Not applicable.


NEC: In accordance with NFPA 70.NNV: Not normally ventilated.

NR: No requirement.






Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S



NR


Division 1

NC(Cin witNFNFNFNF

b NR


Division 1

c NR


Division 2

d NR


Unclassified



NR


Division 1

NC(Cin witanNFNF


Division 1

c NR


Division 2




Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S

d NR


Unclassified

Notes:







NR: No requirement.



File Name Description ApprovedTCDF-1989-820_Table_6.2_Row_8.pdf 1989 NFPA 820 Revisions




The area clasification for a sludge thickener is identical to primary sedimentation tanks, sludge storge tanks and oher locations with a significantly higher potential for flammable gases and vapors. While the potential for methane generation exists a Division 2 classification should provide adequate protection. Ventilation at 12 air changes per hour should allow an area to be unclasified as this will control the rate of methane generation even in the event of extended retention times. The reference to carry-over of floating flammable liquids should be deleted. This may have contributed to the current classification, and was added without substantiation in 1989 (log #63). With sludge being removed from the bottom of the process there is no potential for the carry-over of floating flammable liquids. If needed, to distinguish processes where there is the potential for carryover of flammable liquids an approach similar to Table 5.2 Rows 7 and 8 should be adopted, which seperates aeration basins based on the potential for carry-over of flammable liquids.


Submitter Full Name: TOM BURGESSOrganization: ARCADISStreet Address: City:State: Zip: Submittal Date: Fri May 03 09:22:14 EDT 2013







Fire and Explosion


3


Area

NEC -ArElectrica


1


HANDLING BUILDINGS



2




3 a





b B Unclassified


NA

4 a SCUM PITS



b B Division 2




Fire and Explosion


3


Area

NEC -ArElectrica




5 a

SCUM-PUMPINGAREAS




b B Division 2



6 a

SCUM-PUMPINGAREAS



b C Unclassified


NA

7

SCUMINCINERATORS 2




Unclassified

8 a





b B Division 2




Fire and Explosion


3


Area

NEC -ArElectrica





9 a




D


Division 2

b C


Unclassified

10 a


Retaining of sludge



b B Division 2







Fire and Explosion


3


Area

NEC -ArElectrica


11 a





b B Division 2




12





13 a





b







Fire and Explosion


3


Area

NEC -ArElectrica


14

INCINERATORS 2




15




NR NA Unclassified

16 a





Division 1

b

Envelope



Division 2

c A


Division 1




Fire and Explosion


3


Area

NEC -ArElectrica


d B


Division 1


Division 2

17 a






Division 2


Unclassified

18 a




b B Division 2


Division 1




Fire and Explosion


3


Area

NEC -ArElectrica


19




NNV


Division 1

20 a

WASTE

GAS

BURNERS




Division 1

b

Envelope


Division 2

21




NR NA Unclassified

22 a





Division 1





Fire and Explosion


3


Area

NEC -ArElectrica


c C



23




24 a

COMPOSTINGPILES




b C Unclassified

25 a

IN-VESSELCOMPOSTING





Division 2


26 a

ODOR-CONTROLSYSTEM AREAS Areas physically separated from processes that house systems

handling flammable



handling exhaust gases from those processes

Leakageand ignition of process gases and vapors

DEntirearea if enclosed

Division2

NC, LC, or LFS

CGD, FDS, and FE

b C


Division 2

cAreasbeyond 0.9 m (3 ft)

Unclassified

27




NA NR NA UnclassifiedNCLCor LFS

Notes:


















NA: Not applicable.




NR: No requirement.Footnotes:1The area beyond the envelope is unclassified.2See NFPA 54, NFPA 82, and NFPA 85.3These unit processes use corrosive chemicals that can have a deteriorating effect on conductors and equipment. Electrical equipment shall be identified for use in the operating environment.





Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S



NR


Division 1

NC(Cin witNFNFNFNF

b NR


Division 1

c NR


Division 2

d NR


Unclassified



NR


Division 1

NC(Cin witanNFNF


Division 1

c NR


Division 2




Fire and Explosion

HazardVentilation 1


Area

NEC -AreaElectrical


Cfo

S

d NR


Unclassified

Notes:







NR: No requirement.



This terminology accurately describes the intended function for the "Location and Function" column.


Submitter Full Name: RALPH THOMASOrganization: METRO COUNCIL ENVIROMENTAL SVCStreet Address: City: State:Zip: Submittal Date: Tue May 14 17:25:41 EDT 2013




I, RALPH THOMAS, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Input (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Input in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Input and that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am RALPH THOMAS, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature




Note: This Proposal originates from Tentative Interim Amendment 820-12-1 (TIA 1025) issued by the Standards Council on August 11, 2011.

1. Revise Table 6.2 (a) Row 12 and add a new Row 13 (renumber subsequent Rows) as follows: (see the uploaded balloted file which as the tables in place)



