Committee on NFPA 820Committee on NFPA 820 M E M O R A N D U M TO: NFPA Technical Committee on...

Committee on NFPA 820

M E M O R A N D U M

TO: NFPA Technical Committee on Wastewater Treatment Plants

FROM: Jeanne Moreau-Correia

DATE: February 2, 2010

SUBJECT: NFPA 820 A11 ROP Letter Ballot

The ROP letter ballot for NFPA 820 is attached. The ballot is for formally voting on

whether or not you concur with the committee’s actions on the proposals. Reasons must

accompany all negative and abstention ballots.

Please do not vote negatively because of editorial errors. However, please bring such

errors to my attention for action.

Please complete and return your ballot as soon as possible but no later than Tuesday,

February 16, 2010. As noted on the ballot form, please submit the ballot to Jeanne

Moreau-Correia, e-mail to [email protected] or fax to 617-984-7110.

The return of ballots is required by the Regulations Governing Committee Projects.

Attachment: Proposals

mailto:[email protected]

Report on Proposals – June 2011 NFPA 820_______________________________________________________________________________________________820-1 Log #CP2

_______________________________________________________________________________________________Technical Committee on Wastewater Treatment Plants,

Add following referenced publication to Chapter 2.NFPA 91:

, 2010 EditionA dding NFPA 91 to the list of referenced publications provides users of NFPA 820 with a reference

document for the proper design of exhaust systems for air conveying vapor and gases from wastewater treatment andcollection facilities.

_______________________________________________________________________________________________820-2 Log #CP3


Add following definition and annex note to Chapter 3, section 3.3 General Definitions and renumbersubsequent definitions as follows:3.3.70* Waste Gas Burner (flare). A safety device used to combust excess digester gas. Waste gas burners reduce the probabilityof odors or gas explosions caused by excess digester gas directly vented to the atmosphere by pressure‐relief valves.A.3.3.70 Waste Gas Burner (flare). This text was paraphrased from MOP 8 “Design of Municipal Wastewater Treatment Plants”,5th Edition, Volume 3: Solids Processing and Management. Published by the Water Environment Federation, 601 Wythe Street,Alexandria, VA 22314. (703) 684‐2400.3.3.701 Wastewater.3.3.701.1Domestic Wastewater.3.3.701.2 Residential Wastewater.3.3.712 Well.3.3.712.1* Dry Well.

3.3.712.2* Wet Well.

Adding definition provides clarification for equipment covered by Table 6.2(a), Row 19.

_______________________________________________________________________________________________820-3 Log #4

_______________________________________________________________________________________________Jason Knecht, Golden Heart Utilities

Add new text to read as follows:Above grade wastewater pumping station: Pump room physically separated with no personnel access or an approved

vapor tight access to wet well.

I am upgrading the electrical for an existing enclosed lift station. The aboveground section houses theelectrical and motors. It is on top of the wet well and is separated from the wet well via concrete floor. However, there isaccess to the wet well inside. I would like to install vapor tight manhole to keep aboveground unclassified.

The TC requests that the submitter provide information and documentation regardingapprovable vapor tight covers in the form of a public comment. The committee points out that once there is an accesspoint between two adjacent rooms, there is no longer a maintainable physical separation. This creates a potentialbreakdown in hazard classifications between each room. The committee also points out that the submitter may proposea new row in Table 4.2 with an appropriate method to mitigate potential hazards with proper ventilation or otherprotection requirements.

1Printed on 1/29/2010



Make following editorial changes (add/delete) to text in Table 5.2 Liquid Stream TreatmentProcesses to clarify intention of text. Delete word “not” in Rows 7, 10, 14, 15 and 16.

*****Insert Table_5.2_Log CP5 Here****

Editorial changes necessary to clarify intended meaning of row information. Deletion of the word “not”from the “NEC” column in rows 7, 10, 14, 15 and 16 clarifies that the spaces are “unclassified” when they are precededby primary sedimentation which would remove floatable flammable and/or combustible materials. Classification ofprimary sedimentation or wastewater that has not undergone primary sedimentation would be covered by theclassifications in Table 5.2 Row 6.

_______________________________________________________________________________________________820-5 Log #CP7


Make following editorial changes (add/delete) to text in Table 5.2 Liquid Stream TreatmentProcesses to clarify intention of text. Add NA and change NA to NR in several rows.

****Insert Table_5.2_Log #CP7 Here*****

Editorial changes necessary to clarify intended meaning of row information. NR is the appropriate textwhen ventilation is not required. NA is the appropriate text when requirements of a column do not apply to a “row”location.


1 NFPA 820 Log #CP5 Rec A2011 ROP

Table 5.2 Liquid Stream Treatment Processes

Row Line Location and

Function

Fire and Explosion Hazard Ventilation

Extent of Classified

Area1

NEC-Area Electrical

Classification (All Class I, Group D)

Material of Construction

for Buildings or Structures

Fire Protection Measures

7 AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBIC SUSPENDED GROWTH SYSTEMS, SEQUENCING BATCH REACTORS

Aerobic treatment of wastewater open to the atmosphere

NA Classified (See Primary Sedimentation)

Unclassified, (If process is not preceded by primary sedimentation., see Primary Sedimentation Tanks in Table 5.2 for classification.)

NR H

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

Aerobic biological treatment of wastewater

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

NA Classified (See Primary Sedimentation)


NR H

14 INTERMEDIATE, SECONDARY, OR TERTIARY SEDIMENTATION TANKS

Separate floating and settleable solids from wastewater at various treatment stages

NA NA Classified (See Primary Sedimentation)


NR H

15 FLASH MIXER OR

NA NA Classified (See Primary

NR H


FLOCCULATION TANKS

Tanks for mixing various treatment chemicals with wastewater

Sedimentation)


16 NITRIFICATION AND DENITRIFICATION TANKS

Tertiary treatment of wastewater to reduce or remove nitrogen

NA NA Classified (See Primary Sedimentation)


NR H




Function



Area1

NEC-Area Electrical


Material of Construction for Buildings

or Structures


7 AERATION BASIN, POND, LAGOON, OXIDATION DITCH, AEROBIC SUSPENDED GROWTH SYSTEMS, SEQUENCING BATCH REACTORS

Aerobic treatment of wastewater open to the atmosphere

NA NAR NA Unclassified (If process is not preceded by primary sedimentation, see Primary Sedimentation Tanks in Table 5.2 for classification.)

NR H

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

Aerobic treatment of wastewater preceded by primary treatment

NA NR Entire enclosed space

Unclassified NC, LC, or LFS

NR

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

Aerobic biological treatment of wastewater

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

NAR NA Unclassified (If process is not preceded by primary sedimentation, see Primary Sedimentation Tanks in Table 5.2 for classification.)

NR H

14 INTERMEDIATE, SECONDARY, OR TERTIARY SEDIMENTATION TANKS

Separate floating and settleable solids from wastewater at various treatment stages


NR H


15 FLASH MIXER OR FLOCCULATION TANKS

Tanks for mixing various treatment chemicals with wastewater


NR H

16 NITRIFICATION AND DENITRIFICATION TANKS

Tertiary treatment of wastewater to reduce or remove nitrogen


NR H

17 BREAKPOINT CHLORINATION TANKS AND CHLORINE CONTACT TANKS

Application of chlorine in aqueous solution to wastewater

NA NAR NA Unclassified NR (These unit processes use corrosive chemicals that require the use of specific materials of construction. Special consideration shall be given to these materials of construction.)

H

19 INTERMEDIATE OR FINAL PUMPING STATIONS

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

NA NAR NA Unclassified NR H

20 GRAVITY AND PRESSURE FILTERS

Filtering of treated wastewater through sand or other media


24 ULTRAVIOLET DISINFECTION UNIT

Disinfection of wastewater effluent by ultraviolet



radiation

25 EFFLUENT STRUCTURES

Various structures conveying treated wastewater away from treatment processes




Add new text as follows at the bottom of Tables 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 Figure A.5.2 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.CGD: Combustible gas detection system.D: No ventilation or ventilated at less than six air changes per hour.FE: Portable fire extinguisher.H: Hydrant protection in accordance with 7.2.4.LC: Limited-combustible material.LFS: Low flame spread material.NA: Not applicable.NC: Noncombustible material.NEC: In accordance with NFPA 70.NR: No requirement.

Footnotes:1Open channels and open structures upstream from the unit processes are classified the same as the downstreamprocesses 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 tankfrom the minimum operating water surface to the top of the tank wall; (2) envelope 0.46 m (18 in.) above the top of thetank and extending 0.46 m (18 in.) beyond the exterior wall; (3) envelope 0.46 m (18 in.) above grade extending 3 m (10ft) horizontally from the exterior tank walls.

This proposal editorially clarifies the application difference between footnote numbers within the tableand the notes that are listed below to accompany the table.




Make following editorial changes (add/delete) to text in Table 5.2 Liquid Stream TreatmentProcesses to clarify intention of text. 1. Add “MEMBRANE BIOLOGICAL REACTORS” (MBRs) to Row 9 to clarifyintended application of row.

******See Include Table_5.2_CP9*****

Editorial changes necessary to clarify intended meaning of row information. MBRs were added to Table5.2 during the revision of the 2008 edition of this standard. Failure to add MBRs to Row 9 was an editorial oversight.





Function



Area1

NEC-Area Electrical


Material of Construction for Buildings or Structures


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

Aerobic treatment of wastewater preceded by primary treatment

NA NR Entire enclosed space

Unclassified NC, LC, or LFS

NR



Make following editorial changes add footnote 4 to Table 5.2 and 3 to Table 6.2(a) to clarify intentionof text. Add statement of clarification concerning electrical equipment used in areas with deteriorating effects to NEChazard column.

*****Insert Table_5.2_ and Table_6.2(a)_Log #CP10 Here****

Editorial changes necessary to clarify intended meaning of row information. Additional text in Row 17clarifies the importance of providing electrical equipment appropriate for use in areas with deteriorating agents that maydamage electrical conductors and/or equipment creating hazards of fire, explosion, electric shock and electrocution.While this fundamental requirement is found in NEC 110.11 and 300.6, improperly installed and maintained electricalequipment is common in wastewater treatment and collection facilities. Improperly installed and maintained equipmentposes risks of fire, explosion, electric shock and electrocution.The following photos illustrate the importance of installing electrical equipment identified for use in wastewater treatmentand collection operating environments. Photos included in the proposal are merely for illustrative purposes to convey thesubstantiation for this proposal and are not intended for use in NFPA 820.

*******See Include Figure1CP10*********






Row Line

Location and

Function



Area1

NEC-Area Electrical

Classification (All Class I, Group D) 4

Material of Construction

for Buildings or Structures


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 6.2(a) Solids Treatment Processes

Row Line

Location and

Function

Fire and Explosion Hazard Ventilation1,3


Area

NEC-Area Electrical

Classification (All Class I, Group D) 3

Material of Construction for Buildings or Structures


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.

Figure 1. Electrical switch in a wastewater treatment facility damaged by corrosion.

Figure 2. Explosion-proof switch and outlet box in a wastewater collection facility damaged by corrosion.

Figure 3. Electrical switch in a chlorine handling room damaged by corrosion.



Make following editorial changes (add/delete) to text in Table 5.2 Liquid Stream TreatmentProcesses to clarify intention of text. Add word “effluent” to Row 24.

****See Include Table 5.2_Log #CP11*****

Editorial changes necessary to clarify intended meaning of row information. Row 24 is only intended toapply to the use of UV disinfection for the treatment of wastewater effluent. Wastewater effluent poses no known fireand explosion hazards, however, other points in the treatment process may pose significant fire and explosion hazards.UV disinfection installed in other wastewater treatment and collection locations must comply with the appropriateprovisions of Tables 5.2, 6.2(a) and 6.2(b). No other uses for UV disinfection are known or anticipated by the committeeat the time of this revision. Any current or future use of UV disinfection for other treatment processes must be approvedby the AHJ and should be submitted as a proposal for future editions of NFPA 820.





Function



Area1

NEC-Area Electrical


Material of Construction for Buildings

or Structures


24 ULTRAVIOLET DISINFECTION UNIT

Disinfection of wastewater effluent by ultraviolet radiation

NA NA Unclassified NR H



Discuss Row 16 and establish a working group to examine current denitrification processes usingflammable and/or combustible liquids such as methanol. Develop proposal for modification or provide guidance to usersof NFPA 820 regarding the safe use of these materials in wastewater treatment and collection facilities that are beyond“incidental” use.

NFPA 820 does not currently address the safe use of flammable and/or combustible liquids fordenitrification treatment of wastewater. On January 11, 2006, two municipal wastewater treatment plant workers diedand another was seriously injured while attempting to remove a steel canopy above a methanol storage tank at theBethune Point wastewater plant operated by the City of Daytona Beach. The workers were using a cutting torch thatlikely ignited methanol vapors from the tank and caused an explosion. The explosion led to the release of the totalcontents of the tank, approximately 3,000 gallons of methanol. Investigation revealed issues that could be addressed inNFPA 820.The committee is asked to review the following video and information from the United States Chemical Safety Board(CSB) investigation into this tragic accident and determine if area classification is appropriate:http://www.csb.gov/investigations/detail.aspx?SID=21.Specifically, the CSB requested the Water Environment Federation (WEF) and the Methanol Institute to address theissue of area classification. This issue is best addressed by the NFPA Technical Committee on Wastewater TreatmentPlants.

The committee is rejecting this committee proposal as a means to create a placeholder for thismaterial at the ROC phase. The TC plans to formulate a task group and comment at the ROC phase.

_______________________________________________________________________________________________820-11 Log #3

_______________________________________________________________________________________________John N. Harrell, Wilson & Company

Revise text as follows:On Extent of classified area, delete reference to footnotes 2, 3." ...around equipment and open channel 2, 3 "

The footnotes refer to tanks and are not applicable to screening facilities. The footnote reference hascaused confusion with contractors and manufacturers.




Add new text as follows at the bottom of Tables 6.2.(a):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 eachlocation 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.C: Continuously ventilated at six air 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.FAS: Fire alarm system.FDS: Fire detection system.FE: Portable fire extinguisher.FSS: Fire suppression system (e.g., automatic sprinkler, water spray, foam, gaseous, or dry chemical).H: Hydrant protection in accordance with 7.2.4.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.

Footnote:1The area beyond the envelope is unclassified.2See NFPA 54, NFPA 82, and NFPA 85.


_______________________________________________________________________________________________820-13 Log #1

_______________________________________________________________________________________________Paul J. McGuire, Northeast Ohio Regional Sewer District

There appears to two unit conversion mistakes in row 24b and 24c:"Areas within 1.5 m 0.9 m (3 ft) of leakage sources such as fans..."and"Areas beyond 1.5 m 0.9 m (3 ft)"

3 ft = 36 in. and 36 in. x 0.0254 m/in. = 0.9144m. Rounded to a single decimal point is 0.9 m.Compare page 830-27, Table 5.2, Row 26 also for Odor-Control System Areas, where 0.9 m is correctly used as the

metric conversion for 3 ft.

This correction has already been made with the 2008 edition of NFPA 820. The TC also notesthat this material is under Row 25 of Table 6.2(a).




Add new text as follows at the bottom of Tables 6.2(b):Notes:(1) The NR designation in the ventilation column indicates that no ventilation requirements are established for the spaceand, therefore, Table 9.1.1.4 also has no requirements.(2) The following codes are used in this table:FAS: Fire alarm system.FSS: Fire suppression system (e.g., automatic sprinkler, water spray, foam, gaseous, or dry chemical).H: Hydrant protection in accordance with 7.2.4.NEC: In accordance with NFPA 70.NC: Noncombustible material.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 combustibleliquids, see NFPA 30.4The area beyond the envelope is unclassified.


_______________________________________________________________________________________________820-15 Log #6

_______________________________________________________________________________________________Alex Reed, Brown and Cladwell

Revise text as follows:All continuous Ventilation systems that are used to down grade the classification of a space shall be fitted with flow

detection devices connected to alarm signaling systems to indicate ventilation system failure to provide the required airchanges.

The existing text is not clear. There is not a definition of "continuous ventilation" in NFPA 820. There isnot a reason to require ventilation alarms unless the ventilation is used to change the classification of the space. Forinstance if a fan is configured to run all of the time in a classified area that does not have it's classification reduced thenthe existing sentence could be interpreted to require monitoring, and the solution is either to provide flow monitoring orprovide automatic control so that the control does not appear to be "continuous".

Today I was informed by a mechanical design lead that 7.5.1 means that any space that is discussed in NFPA 820 thatalso has ventilation shall have ventilation alarms. If that is the intent the sentence should be re-worded as follows:

All continuous Ventilation systems that are associated with areas discussed in NFPA 820 shall be alarmed per table7.5.3.

Revise text as follows:All continuous ventilation systems that are used to downgrade the classification of a space shall be fitted with flow

detection devices connected to alarm signaling systems to indicate ventilation system failure to provide the required airchanges.

The committee believes that Merriam-Webster clearly defines the word "continuous" and that itfits with the word as used in NFPA 820 and did not omit it from the requirement as suggested. The committee agreeswith the submitter's other changes, as it provides clarity.


Report on Proposals – June 2011 NFPA 820_______________________________________________________________________________________________820-16 Log #5

_______________________________________________________________________________________________Alex Reed, Brown and Cladwell

Revise text as follows:Remote signaling systems shall be in accordance with the requirements for supervised signaling systems as set forth

in NFPA 72 monitored continuously by staff having the authority to make decisions regarding plant operation.The existing text does not communicate what the authors of NFPA 820 intended. The existing text has

been misinterpreted to mean that a UL listed Fire Alarm panel is required and that the fire department is required toreceive the alarms from the Fire Alarm panel. I have also seen that words "supervised signaling system" mean that thecircuit is to be electrically designed as a Supervised Circuit; so that a false open or false close will cause a circuit failurealarm.

I am interpreting this sentence per the revised text attached with the understanding that the revised text is what wasintended by NFPA 820. It would save time in discussing the intent of this sentence, save equipment that is not required,and provide a more appropriate response to these alarms if the sentence is re-written to be more clear or deleted.

The committee believes that NFPA 72 fire alarms are needed to provide reliable assurances foralarming on failure of classification reduction systems.

_______________________________________________________________________________________________820-17 Log #CP19


Revise 9.2.1 and 9.2.2 as follows:9.2.1 Ventilation systems serving spaces governed by this standard shall be designed in accordance with NFPA 90ANFPA 91.9.2.2 NFPA 90A NFPA 91 shall not apply to the design of ventilation systems where superseded by a more restrictiveprovision of this standard.

NFPA 91, The Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, andNoncombustible Particulate Solids, is the more appropriate document to be referenced and used for installation ofventilation systems in NFPA 820 rather than NFPA 90A, The Standard for the Installation of Air-Conditioning andVentilating Systems.

_______________________________________________________________________________________________820-18 Log #2

_______________________________________________________________________________________________Paul J. McGuire, Northeast Ohio Regional Sewer District

Although Annex A is not part of the requirements of this NFPA document, the diagrams should beconsistent with the text in the rest of the document. The text consistently converts 10 ft as 3 meters. The diagrams inAnnex A show 10 ft as 3.1 meters. 3.1 meters represents a rounding error. Proposed text: 3.1 m 3 m (10 ft).

See Figure A.5.2 (1 place), Figure A.6.2(a) (1 place), Figure A.6.2(b) (2 places), Figure A.6.2(c) (1 place), FigureA.6.2(d) (2 places), Figure A.6.2(e) (2 Places), Figure A.6.2(f) (1 place), Figure A.6.2(g) (2 places).

10 ft = 120 in. and 120 in. x 0.0254 m/in. = 3.048 m. Rounded to a single decimal point is 3.0 or 3 m.

Revise the suggested figures and all other conversions throughout the document as follows:3.1.0 m (10 ft)3.0 m (10 ft)

The TC agrees with the submitter's proposal and floats the number out to the tenths digit forconsistency with the rest of the standard.




Add following text and referenced publication to A.9.3.3.A.9.3.3 Ventilation rates and procedures established by this standard might not be sufficient to protect personnel fromexposure to toxic gases that might be present in enclosed spaces. For further information, refer to Industrial Ventilation—A Manual of Recommended Practice for Design, published by the American Conference of Governmental IndustrialHygienists (ACGIH) and 29 CFR 1910.1000, Air Contaminants.

Adding the ACGIH “Industrial Ventilation” manual to this annex provides users with an acceptedreference for the design of ventilations systems for the personnel protection in wastewater treatment and collectionfacilities. This is consistent with NFPA 91 which also includes this as a reference document for the proper design ofexhaust systems for air conveying vapor and gases.

_______________________________________________________________________________________________820-20 Log #CP15


Add text to Annex B Wastewater Treatment ProcessesB.1 General. Annex B provides a general overview and layout of the unit processes found at a typical wastewatertreatment plant, although the arrangement of the unit processes varies from plant to plant. For additional information onthe design and operation of wastewater treatment and collection facilities, refer to the most current Manual of Practice(MOP) published by the Water Environment Federation (WEF).

Adding WEF Manuals of Practice to Annex B provides users with updated current references forclarification on design and operation principles of wastewater treatment and collection facilities. MOP 8 is theinformational source for proposed definition of waste gas burner. Older versions of the MOPs have been referenced inprior editions of NFPA 820 Annex F.

_______________________________________________________________________________________________820-21 Log #CP18


Revisions to Annex D Chemical and Fuel Fire/Explosion Hazards, section D.5.3. Revise ChlorineInstitute (CI) reference.D.5.3 Chlorine is a very reactive chemical and necessitates special consideration in storing and handling. Chlorine incombination with other chemicals can produce sufficient heat to cause combustion of flammable materials. Chlorine andother reactive chemicals should always be stored separately. (See informational references from the Chlorine Institute,Properties of Chlorine in Annex F.)

Editorial revision referring NFPA 820 users to CI publications addressing chlorine hazards inwastewater treatment and collection facilities.




Editorial revisions to Annex F Informational References, section F.2. Informational References.Move the WEF publications to section F.1.2 and update the reference to the current editions of the publications, addMOP 7 to list of publications.Renumber current section F.1.2.5 to F.1.2.7.F.1.2.6 WEF Publications.Water Environment Federation, 601 Wythe Street, Alexandria, VA 22314.Wastewater Collection Systems Management — Manual of Practice (MOP) 7, 6th Edition, 2009.Design of Municipal Wastewater Treatment Plants — Manual of Practice (MOP) 8, 5th Edition, 2009.Operation of Municipal Wastewater Treatment Plants — Manual of Practice (MOP) 11, 6th Edition, 2007.F.1.2.57 Other Publications.F.2 Informational References.Water Pollution Control Federation, Wastewater Treatment Plant Design, Manual of Practice #8, Alexandria, VA, 1990.Water Pollution Control Federation, Wastewater Treatment Plant Operations, Manual of Practice #11, Alexandria, VA1990.

Adding WEF publications to “other publications” provides users of NFPA 820 Annex B with referencesfor clarification on design and operation principles for wastewater treatment and collection facilities. MOP 8 is theinformational source for proposed definition of waste gas burner.

_______________________________________________________________________________________________820-23 Log #CP17


Editorial revisions to Annex F Informational References, section F.2. Informational References. AddACGIH publications to section F.1.2 and section F.2 to remain consistent with other NFPA documents, including NFPA91-2010. Renumber subsequent publication reference lines in F.1.2. Add new document to list of publications from theChlorine Institute (CI).F.1.2.1 ACGIH Publications. American Conference of Governmental Industrial Hygienists, 1330 Kemper Meadow Drive,Cincinnati, OH 45240-1634. Industrial Ventilation —A Manual of Recommended Practice for Design, 27th edition, 2010.F.1.2.12 ASTM PublicationsF.1.2.23 CI Publications.Properties of Chlorine, edition No. 2, 1986.

, 2008.2007

F.1.2.45 U.S. Government Publications. U.S. Government Printing Office, Washington, DC 20402.Title 40, Code of Federal Regulations, Part 761.30.OSHA, Title 29, Code of Federal Regulations, Part 1910.156.OSHA, Title 29, Code of Federal Regulations, Part 1910.1000.F.2 Informational References.ACGIH, , 2007.

Adding the ACGIH “Industrial Ventilation” manual to this annex provides users with an acceptedreference for the design of ventilations systems for the personnel protection in wastewater treatment and collectionfacilities. This is consistent with NFPA 91 which also includes this as a reference document for the proper design ofexhaust systems for air conveying vapor and gases. Adding CI Pamphlets 155 and 164 provide users of NFPA 820 withupdated reference documents addressing the hazards of chlorine in wastewater treatment and collection facilities.


Report on Proposals – June 2011 NFPA 820_______________________________________________________________________________________________820-24 Log #8

_______________________________________________________________________________________________Bob Eugene, Underwriters Laboratories Inc.

Revise text to read as follows:Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

Hazardous Location Equipment Directory, 1989 2009.Update referenced standard to most recent revision.


Committee on NFPA 820Committee on NFPA 820 M E M O R A N D U M TO: NFPA Technical Committee on...

Documents

Transcript of Committee on NFPA 820Committee on NFPA 820 M E M O R A N D U M TO: NFPA Technical Committee on...