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1 Page 1 of 126 First Revision No. 113-NFPA [ Global Input ] Change all references to Material Safety Data Sheets (MSDS) to Safety Data Sheets (SDS) Submittal Date: Thu May 09 11:40:44 EDT 2013 Response Message: OSHA HAZ COM has changed Material Safety Data Sheets to Safety Data Sheets. Note: global change from MSDS to MSDS/SDS

2 Page 2 of 126 First Revision No. 144-NFPA [ Global Input ] Delete Section 6.1 and renumber the rest of the chapter accordingly. Submitter Full Name: Susan Bershad Organization: National Fire Protection Assoc Submittal Date: Mon Jul 22 10:29:11 EDT 2013 Response Message: Delete Section 6.1 and renumber the rest of the chapter accordingly.

3 Page 3 of 126 First Revision No. 95-NFPA [ New Section after ] This standard shall apply to all educational laboratory units and instructional laboratory units in which any quantity of chemicals, as defined, is handled or stored. Submittal Date: Fri May 03 12:48:07 EDT 2013 Response Message: The TC believes that standard needs to apply to all educational and instruction labs, regardless of the quantity of chemicals used or handled.

4 Page 4 of 126 First Revision No. 96-NFPA [ Section No ] This With the exception of 1.1.2, this standard shall not apply to the following: (1)* Laboratories for which the following conditions apply: (a) (b) Laboratory units that contain less than or equal to 4 L (1 gal) of flammable or combustible liquid Laboratory units that contain less than 2.2 standard m 3 (75 scf) of flammable gas, not including piped-in low-pressure utility gas installed in accordance with NFPA 54, National Fuel Gas Code (2)* Laboratories that are pilot Pilot plants (3) Laboratories that handle only chemicals with a hazard rating of 0 or 1, for all of the following: health, flammability, and instability, as defined by NFPA 704, Standard System for the Identification of the Hazards of Materials for Emergency Response, for all of the following: health, flammability, and instability (4) Laboratories that are primarily manufacturing plants (5) Incidental testing facilities (6) Physical, electronic, instrument, laser, or similar laboratories that use chemicals only for incidental purposes, such as cleaning (7)* Hazards associated with radioactive materials, as covered by NFPA 801, Standard for Fire Protection for Facilities Handling Radioactive Materials (8) Laboratories that work only with explosive material, as covered by NFPA 495, Explosive Materials Code Submittal Date: Fri May 03 12:53:13 EDT 2013

5 Page 5 of 126 Response Message: Technical revised this section to reflect that educational and instructional laboratories are within the scope of NFPA 45 regardless of the amount of chemicals used or handled. It also wanted to clarify that laboratories are not pilot plants and that pilot plants are not covered under this code.

6 Page 6 of 126 First Revision No. 38-NFPA [ Section No. 2.2 ] 2.2 NFPA Publications. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA NFPA 1, Fire Code, 2015 edition. NFPA 10, Standard for Portable Fire Extinguishers, edition. NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam, edition. NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, edition. NFPA 12A, Standard on Halon 1301 Fire Extinguishing Systems, edition. NFPA 13, Standard for the Installation of Sprinkler Systems, edition. NFPA 14, Standard for the Installation of Standpipe and Hose Systems, edition. NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, edition. NFPA 17, Standard for Dry Chemical Extinguishing Systems, edition. NFPA 17A, Standard for Wet Chemical Extinguishing Systems, edition. NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems, edition. NFPA 30, Flammable and Combustible Liquids Code, edition. NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, 2011 edition. NFPA 51, Standard for the Design and Installation of Oxygen Fuel Gas Systems for Welding, Cutting, and Allied Processes, edition. NFPA 54, National Fuel Gas Code, edition. NFPA 55, Compressed Gases and Cryogenic Fluids Code, edition. NFPA 58, Liquefied Petroleum Gas Code, edition. NFPA 69, Standard on Explosion Prevention Systems, 2008 edition. NFPA 70, National Electrical Code, edition. NFPA 72, National Fire Alarm and Signaling Code, edition. NFPA 80, Standard for Fire Doors and Other Opening Protectives, edition. NFPA 86, Standard for Ovens and Furnaces, 2011 edition. NFPA 90A, Standard for the Installation of Air-Conditioning and Ventilating Systems, 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, edition.

7 Page 7 of 126 NFPA 400, Hazardous Materials Code, 2013 edition. NFPA 495, Explosive Materials Code, edition. NFPA 496, Standard for Purged and Pressurized Enclosures for Electrical Equipment, edition. NFPA 704, Standard System for the Identification of the Hazards of Materials for Emergency Response, edition. NFPA 750, Standard on Water Mist Fire Protection Systems, edition. NFPA 801, Standard for Fire Protection for Facilities Handling Radioactive Materials, edition. NFPA 1962, Standard for the Inspection, Care, and Use of Fire Hose, Couplings, and Nozzles and the Service Testing of Fire Hose, 2008 edition. NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems, edition. NFPA 2112, Standard on Flame-Resistant Garments for Protection of Industrial Personnel Against Flash Fire, 2012 edition. Submittal Date: Tue Apr 23 15:13:27 EDT 2013 Response Message: For materials other than flammable and combustible liquids, it is the intent of NFPA 45 to provide appropriate references to other NFPA standards, but not specifically call out maximum allowable quantities. Paragraphs and , for example, provide guidelines for the quantity of compressed and liquefied gases in Class A-D laboratory units with references to NFPA 55, Compressed Gases and Cryogenic Fluids Code. NFPA 400, Hazardous Materials Code is not currently a referenced publication of NFPA 45. This standard consolidates all fire and life safety requirements applicable to handling, storage, and use of hazardous materials into one single comprehensive resource. The proposed modifications add this standard to the list of referenced publications in Chapter 2, for broad application, and also add a specific reference to Chapter 9, addressing circumstances not specifically included in NFPA 45, but applicable to laboratory environments. In addition to adding NFPA 400 to the referenced publications list, all publications were updated to current editions

8 Page 8 of 126 First Revision No. 99-NFPA [ Section No ] AIHA Publications. American Industrial Hygiene Association, 2700 Prosperity Avenue, Suite 250, Fairfax, VA ANSI/AIHA Z9.5, Laboratory Ventilation, Submittal Date: Wed May 08 16:03:10 EDT 2013 Updated to most recent revision of standard Response Message:

9 Page 9 of 126 First Revision No. 100-NFPA [ Section No ] ANSI Publications. American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY ANSI Z535.1, Safety Color Code, ANSI Z535.2, Environmental and Facility Safety Signs, ANSI Z535.3, Criteria for Safety Symbols, ANSI Z535.4, Product Safety Signs and Labels, Submittal Date: Wed May 08 16:05:44 EDT 2013 Updated to most recent version of publication. Response Message:

10 Page 10 of 126 First Revision No. 101-NFPA [ Section No ] ASME Publications. American Society of Mechanical Engineers, Three Park Avenue, New York, NY ASME Boiler and Pressure Vessel Code, Section VIII, Submittal Date: Wed May 08 16:08:03 EDT 2013 Updated to most recent version of document Response Message:

11 Page 11 of 126 First Revision No. 56-NFPA [ Section No ] ASTM Publications. ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA ASTM D 5, Standard Test Method of Penetration of Bituminous Materials, 2006 e1. ASTM E 84, Standard Test Method for Surface Burning Characteristics of Building Materials, c. Submittal Date: Wed May 01 09:52:49 EDT 2013 standards date updates Response Message: Public Input No. 33-NFPA [Section No ]

12 Page 12 of 126 First Revision No. 102-NFPA [ Section No ] NSF Publications. NSF International, P.O. Box , 789 N. Dixboro Road, Ann Arbor, MI NSF/ANSI 49, Class II (Laminar Flow) Biosafety Cabinetry, Submittal Date: Wed May 08 16:18:14 EDT 2013 Updated to reflect most recent edition of document Response Message:

13 Page 13 of 126 First Revision No. 57-NFPA [ Section No ] UL Publications. Underwriters Laboratories, Inc. 333 Pfingsten Road, Northbrook, IL ANSI/UL 723, Standard for Test for Surface Burning Characteristics of Building Materials, 2008, revised UL 1275, Standard for Flammable Liquid Cabinets, 2005, revised UL 1805, Standard for Laboratory Hoods and Cabinets, Submittal Date: Wed May 01 09:53:58 EDT 2013 Update referenced standards to most recent edition as indicated. Response Message: Public Input No. 37-NFPA [Section No ]

14 Page 14 of 126 First Revision No. 103-NFPA [ Section No. 2.4 ] 2.4 References for Extracts in Mandatory Sections. NFPA 54, National Fuel Gas Code, edition. NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2010 edition. NFPA 99, Standard for Health Care Facilities Code, edition. NFPA 101, Life Safety Code, edition. NFPA 400, Hazardous Materials Code, 2013 edition. NFPA 801, Standard for Fire Protection for Facilities Handling Radioactive Materials, 2014 edition. NFPA 5000, Building Construction and Safety Code, edition. Submittal Date: Wed May 08 16:18:52 EDT 2013 Update to reflect the most recent edition of the publication. Response Message:

15 Page 15 of 126 First Revision No. 58-NFPA [ Section No ] 3.3.7* Canopy Hood. A suspended ventilating device used only to exhaust heat, water vapor, odors, and other nonhazardous materials. This is not a chemical fume hood and generally is not effective for exhausting toxic or flammable materials. Supplemental Information File Name 45_FR_58_Annex_Material.doc Description Submittal Date: Wed May 01 10:01:03 EDT 2013 Response Message: The second sentence is not part of the definition but rather is explanatory material. As such, it should appear in Annex A. Public Input No. 2-NFPA [Section No ]

16 Annex Material NFPA 45 FR #58 A Canopy Hood. This is not a chemical fume hood and generally is not as effective for exhausting toxic or flammable materials.

17 Page 16 of 126 First Revision No. 61-NFPA [ Section No ] Educational Laboratory Unit. A laboratory unit that is used under direct supervision of an instructor and used for educational purposes for students through the twelfth grade by six or more persons for four or more hours per day or more than 12 hours per week. Submittal Date: Wed May 01 10:43:49 EDT 2013 Response Message: The Technical made changes to the definition in order to be consistent with the changes made to the definition of instructional laboratory in section

18 Page 17 of 126 First Revision No. 104-NFPA [ New Section after ] Glove Box. A sealed enclosure in which items inside the box are handled exclusively using long gloves sealed to ports in the walls of the enclosure. [ 801, 2014] Submittal Date: Wed May 08 16:40:04 EDT 2013 Response Message: Providing a definition of glove box to support the next section in Chapter 8. Note that this definition is extracted from NFPA 801.

19 Page 18 of 126 First Revision No. 47-NFPA [ New Section after ] Instructor. A person whose job includes teaching or instructing students in educational or instructional laboratories. This can include science teachers, professors, assistant professors, associate professors, lecturers, substitute teachers, and teaching assistants. Submittal Date: Wed Apr 24 17:46:06 EDT 2013 Response Message: Definition needed for new Chapter on Educational and Instructional Laboratories

20 Page 19 of 126 First Revision No. 60-NFPA [ Section No ] Instructional Laboratory Unit. A laboratory unit used for education past the 12th grade and before post-college graduate-level instruction for the purposes of instruction of six or more persons for four or more hours per day or more than 12 hours per week. Experiments and tests conducted in instructional laboratory units are under the direct supervision of an instructor. Laboratory units used for graduate or post-graduate research are not to be considered instructional laboratory units. that is used for purposes of instruction for students beyond the twelfth grade. Submittal Date: Wed May 01 10:17:25 EDT 2013 Definitions should not have requirements - The second and third sentence are requirements which should be in the body of the standard or in an annex. The recommendation is that they be placed in the annex. The Technical has revised the definition further to eliminate the usage criteria believing that risk is the same regardless of the time and number of people using the lab. Requirements will be in a new chapter on educational and instructional labs. Response Message: Public Input No. 36-NFPA [Section No ]

21 Page 20 of 126 First Revision No. 62-NFPA [ Section No ] * Laboratory Unit. An enclosed space used for experiments or tests. A laboratory unit can include offices, lavatories, and other incidental contiguous rooms maintained for or used by laboratory personnel, and corridors within the unit. It can contain one or more separate laboratory work areas. It can be an entire building. A laboratory unit is classified as A, B, C, or D in accordance with Section 4.2. (See also Section 4.2 and Annex D.) Supplemental Information File Name 45_FR_62_Annex_Material.doc Description Submittal Date: Wed May 01 11:10:59 EDT 2013 Response Message: The definition should not contains requirements that address a specific section of the standard but should be generic. Public Input No. 35-NFPA [Section No ]

22 Annex Material for FR 62 NFPA 45 A Laboratory Unit. A laboratory unit can include offices, lavatories, and other incidental contiguous rooms maintained for or used by laboratory personnel, and corridors within the unit. It can contain one or more separate laboratory work areas. It can be an entire building. A laboratory unit is classified as A, B, C, or D in accordance with Section 4.2 (see also Annex D).

23 Page 21 of 126 First Revision No. 35-NFPA [ New Section after ] * Pyrophoric Reagent. A solid or liquid substance that ignites at 54ºC (130ºF) or below on exposure to water vapor in air-producing flammable gas and heat. Supplemental Information File Name 45_FR_35_Annex_Material.doc Description Submittal Date: Tue Apr 23 14:45:52 EDT 2013 Response Message: The definition and supporting Annex information are needed to clarify the new requirements in Chapter 6 section 6 on pyrophoric reagents. Note that this term is also used in Chapter 12.

24 Annex Material for FR 35 A Pyrophoric Reagent. The three general types of pyrophoric reagents that produce these results include the following: (1) Alkali metals, some alkali earth metals, and other metals that are finely divided (small particulates and nanoparticles) react with water vapor to generate hydrogen and heat. (2) Metal hydrides react in the same manner, generating heat and hydrogen. (3) Organometallics are reagents with carbon metal bonds that generate a volatile organic compound and heat when they react with moisture. The most common examples are alkyl lithium reagents, Gringards (C-MgX), and phosphines. Some compounds that have carbon transition metal bonds are also known as pyrophoric reagents.

25 Page 22 of 126 First Revision No. 142-NFPA [ Section No ] Storage Cabinet. A cabinet for the storage of flammable and combustible liquids constructed in accordance with Section 9.5 of NFPA 30, Flammable and Combustible Liquids Code. Submitter Full Name: Susan Bershad Organization: National Fire Protection Assoc Submittal Date: Wed Jun 19 13:03:01 EDT 2013 The existing definition contains requirements to comply with NFPA 30. The NFPA Manual of Style prohibits requirements in definitions. A definition of Storage Cabinet is not needed and can be deleted. Requirements for storage cabinets are contained in and Note that the term, Storage Cabinet, is used in NFPA 30 but is not defined. Response Message: Public Input No. 6-NFPA [Section No ]

26 Page 23 of 126 First Revision No. 48-NFPA [ Section No ] This chapter shall further define limitations on instructional laboratory units. Submittal Date: Wed Apr 24 17:50:39 EDT 2013 Response Message: This statement does not seem to add value especially with a chapter addressing instructional and educational laboratories

27 Page 24 of 126 First Revision No. 106-NFPA [ Section No ] The required construction of laboratory units shall be in accordance with Table Table Separation Requirements and Height Allowances for Laboratory Units Laboratory Unit a Area of Lab Unit Fire Separation b Permitted Stories Above Grade Permitted Stories Below Grade A B 929 m 2 ( 10,000 ft 2 ) >929 m 2 (>10,000 ft 2 ) 929 m 2 ( 10,000 ft 2 ) 929 m 2 ( 10,000 ft 2 ) >929 m 2 (>10,000 ft 2 ) 2 hours 1 3 c Not permitted Not permitted d 1 hour 1 3 c 1 2 hours 4 6 c Not permitted d C Any size Not required Any size 1 hour 4 6 Any size 2 hours Over 6 D Any size Not required No limit No limit a Refer to Table for laboratory unit classification. b Separation in this table refers to separation from laboratory unit(s) to nonlaboratory areas and/or separations from laboratory unit(s) of equal or lower hazard classification. c Not allowed in structures below grade. d Labs of this classification and size are not permitted. Supplemental Information File Name Table_5.1.1.docx Description

28 Table Separation Requirements and Height Allowances for Laboratory Units Formatted Table Laboratory Unit a Area of Lab Unit Fire Separation b Permitted Stories Above Grade Permitted Stories Below Grade A 929 m 2 ( 10,000 ft 2 ) 2 hours 1 3 c Not permitted >929 m 2 (>10,000 ft 2 ) Not permitted d B 929 m 2 ( 10,000 ft 2 ) 1 hour 1 3 c m 2 ( 10,000 ft 2 ) 2 hours 4 6 c >929 m 2 (>10,000 ft 2 ) Not permitted d C Any size Not required Any size 1 hour 4 6 Any size 2 hours Over 6 D Any size Not required No limit No limit a Refer to Table for laboratory unit classification. b Separation in this table refers to separation from laboratory unit(s) to non-laboratory areas and/or separations from laboratory unit(s) of equal or lower hazard classification. c Not allowed in structures below grade. d Labs of this classification and size are not permitted.

29 Page 25 of 126 Submittal Date: Thu May 09 08:51:11 EDT 2013 Response Message: The modifications to Table are based on the philosophy that the highest hazard laboratories are not permitted on floors below grade, moderate hazard labs are permitted on one floor below grade, low hazard labs permitted one or two floors below grade and minimal hazard labs permitted on any level below grade.

30 Page 26 of 126 First Revision No. 72-NFPA [ Section No ] Table shall pertain to laboratory units protected by automatic sprinkler systems in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems. Where water will create a serious fire or personnel hazard, a suitable nonwater automatic extinguishing system shall be permitted to be an acceptable substitute for sprinklers. Submittal Date: Wed May 01 16:48:07 EDT 2013 Response Message: Technical is deleting this section since the requirement is not longer needed since the 2004 edition required all fire sprinkler protection for all new laboratories.

31 Page 27 of 126 First Revision No. 118-NFPA [ Section No ] 5.1.4* Penetrations through fire-rated floor/ceiling, floor, and wall assemblies shall be protected in accordance with NFPA 101, Life Safety Code. Supplemental Information File Name A docx Description Submittal Date: Fri May 10 10:23:50 EDT 2013 Response Message: Added designation for new Annex text added in this revision cycle.

32 A Requirements for opening protectives in fire-rated barriers are referred to in of NFPA 101, Life Safety Code. Through-penetration firestopping is referred to in of NFPA 101.

33 Page 28 of 126 First Revision No. 23-NFPA [ Section No ] Instructional laboratory units and Class D laboratories shall be classified as business occupancies in accordance with NFPA 101, Life Safety Code. Submittal Date: Mon Apr 22 20:22:09 EDT 2013 Response Message: Class C instructional laboratories are intended to be classified as industrial occupancies and the requirements for life safety are covered b) The revised text of clarifies that Class D instructional laboratories and Class D laboratories in business occupancies be in accordance with the life safety requirements for business occupancies. 3) Deleting and renumbering the revised text of will eliminate confusion and the potential misclassification of Class C instructional laboratories as business occupancies.

34 Page 29 of 126 First Revision No. 24-NFPA [ Section No ] Life safety requirements for instructional laboratory units for past the 12th grade, and for Class D laboratories located in facilities classified as business occupancies, shall be in accordance with the requirements for business occupancies of NFPA 101, Life Safety Code. Submittal Date: Mon Apr 22 20:24:20 EDT 2013 Response Message: Class C instructional laboratories are intended to be classified as industrial occupancies and the requirements for life safety are covered b) The revised text of clarifies that Class D instructional laboratories and Class D laboratories in business occupancies be in accordance with the life safety requirements for business occupancies. 3) Deleting and renumbering the revised text of will eliminate confusion and the potential misclassification of Class C instructional laboratories as business occupancies.

35 Page 30 of 126 First Revision No. 64-NFPA [ Section No ] 5.4.1* A second means of access to an exit shall be provided from a laboratory work area if any of the following situations exist: (1) A laboratory work area contains an explosion hazard located so that an incident would block escape from or access to the laboratory work area. (2) A laboratory work area within a Class A laboratory unit exceeds 46.5 m 2 (500 ft 2 ). (3) A laboratory work area within a Class B, Class C, or Class D laboratory unit exceeds 93 m 2 (1000 ft 2 ). (4) A hood in a laboratory work area is located adjacent to the primary means of exit access. (5) A compressed gas cylinder larger than lecture bottle size [approximately 5 cm 33 cm (2 in. 13 in.)] is located such so that it could prevent safe egress in the event of accidental release of cylinder contents. (6) A cryogenic container is located such so that it could prevent safe egress in the event of accidental release of container contents. Submittal Date: Wed May 01 14:29:50 EDT 2013 Response Message: The TC has deleted the term primary to clarify that laboratories with a single means of egress should not have fume hoods located by the exit.

36 Page 31 of 126 First Revision No. 75-NFPA [ Section No ] 5.6.2* Laboratory work areas, laboratory units, and chemical fume hood interiors shall be considered as unclassified electrically with respect to Article 500 of NFPA 70, National Electrical Code, unless operations are determined to cause a hazardous atmosphere. (See and ) Exception: Under some conditions of hazard, it could be necessary to classify a laboratory work area, or a part thereof, as a hazardous location, for the purpose of designating the electrical installations. [See (electric motors) and (refrigerators).] Supplemental Information File Name 45_FR_75_Annex_Material.doc Description Submittal Date: Thu May 02 09:00:54 EDT 2013 The NFPA Manual of Style prohibits exceptions used in this manner. The text is more appropriately explanatory material and should appear in Annex A. The technical committee has made some modifications and moved some of the exemption text to Annex material. Response Message: Public Input No. 10-NFPA [Section No ]

37 FR 75 Annex Material A A qualified design professional and owner safety officer should review the laboratory conditions through a hazard analysis and/or risk assessment to determine if a hazardous (ignitable) atmosphere could be developed within the laboratory work area, laboratory unit, and/or fume hood. If a hazardous atmosphere could be developed, these areas should be electrically classified per NFPA 70, Article 500.

38 Page 32 of 126 First Revision No. 65-NFPA [ Section No ] All laboratory units shall be provided with fire protection appropriate to the fire hazard, as follows: (1) Portable fire extinguishers (see Section 6.4) (2) Fire alarm systems (see Section 6.5) (3) Evacuation and emergency plans (see 6.6.3) Submittal Date: Wed May 01 14:51:40 EDT 2013 The phrase, appropriate to the hazard is vague, subjective, and unenforceable. The NFPA Manual of Style prohibits unenforceable terms in standards. The requirements in are adequately covered in 6.4, 6.5, and 6.6. This paragraph can be deleted from NFPA 45 without resulting in any significant change in the intent of the standard. Response Message: Public Input No. 12-NFPA [Section No ]

39 Page 33 of 126 First Revision No. 66-NFPA [ Section No ] In addition to the fire protection specified in 6.1.1, laboratory units under some conditions shall be provided with automatic extinguishing systems (see Section 6.2) and inside standpipe and hose systems (see Section 6.3). Submittal Date: Wed May 01 14:52:10 EDT 2013 The phrase, under some conditions is vague, subjective, and unenforceable. The NFPA Manual of Style prohibits unenforceable terms in standards. The requirements in are adequately covered in 6.2 and 6.3. This paragraph can be deleted from NFPA 45 without resulting in any significant change in the intent of the standard. Response Message: Public Input No. 13-NFPA [Section No ]

40 Page 34 of 126 First Revision No. 119-NFPA [ Section No ] * Fire sprinklers in laboratory units shall be the quick-response (QR) sprinkler type installed in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems. Supplemental Information File Name 45_Annex_Material_for_FR_119.doc Description Submittal Date: Fri May 10 10:35:00 EDT 2013 Add designation for new Annex text for section Response Message:

41 Annex Material for FR 119 A A series of fire tests in typical chemical laboratories was conducted to evaluate quick-response sprinkler technology and the use of quick-response sprinklers in chemical laboratories. Fire test results demonstrated that both standard-response and quick-response sprinklers were effective in controlling fires. Additionally, fire test results of the quick-response sprinklers showed lower maximum temperatures at the 5 ft level consistent with what is considered acceptable tenability in the room of fire origin, as discussed in NFPA 13D, Standard for the Installation of Sprinkler Systems in One- and Two- Family Dwellings and Manufactured Homes, and evaluated by ANSI/UL 1626, Residential Sprinklers for Fire Protection Service. Also see NISTIR , "Quick Response Sprinklers in Chemical Laboratories: Fire Test Results," sponsored by the National Institutes of Health, Bethesda, MD.

42 Page 35 of 126 First Revision No. 77-NFPA [ Section No ] 6.1.2* Other Automatic Extinguishing Systems. Where water will create a serious fire or personnel hazard, a suitable nonwater automatic extinguishing system shall be permitted to be an acceptable substitute for sprinklers. Where required or used in place of automatic sprinkler systems, special hazard extinguishing systems and nonwater automatic extinguishing systems shall be designed, installed, and maintained in accordance with the following standards, as applicable: (1) NFPA 11, Standard for Low-, Medium-, and High-Expansion Foam (2) NFPA 12, Standard on Carbon Dioxide Extinguishing Systems (3) NFPA 12A, Standard on Halon 1301 Fire Extinguishing Systems (4) NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection (5) NFPA 17, Standard for Dry Chemical Extinguishing Systems (6) NFPA 17A, Standard for Wet Chemical Extinguishing Systems (7) NFPA 69, Standard on Explosion Prevention Systems (8) NFPA 750, Standard on Water Mist Fire Protection Systems (9) NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems Supplemental Information File Name FR_77_Annex_Material.docx Description Submittal Date: Thu May 02 09:42:33 EDT 2013 Response Message: Text addresses suitable non-water automatic extinguishing systems was moved from

43 FR 77 Annex Material A The basic philosophy of NFPA 45 is to protect laboratory work areas with sprinklers in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems. If a hazard assessment shows that the presence of water-reactive materials would create a serious fire or personnel hazard in the event of the discharge of sprinkler water, a nonwater automatic fire extinguishing system designed to protect the portion of the lab work area containing waterreactive materials is acceptable.

44 Page 36 of 126 First Revision No. 30-NFPA [ Section No ] 6.2.1* In all laboratory buildings that are two or more stories above or below the grade level (level of exit discharge), standpipes Class I wet standpipe systems shall be installed in accordance with NFPA 14, Standard for the Installation of Standpipe and Hose Systems. Supplemental Information File Name 45_FR_30_Annex_Material.doc Description Submittal Date: Tue Apr 23 14:21:24 EDT 2013 Response Message: Clarifies paragraph to require Class 1 standpipe system. Paragraph is no longer needed after clarification to paragraph position is to specify Class I systems since Class II and III systems are not typically installed and since trained personnel are not typically available in laboratory buildings.

45 FR 30 Annex Material A All laboratory buildings should be provided with standpipes and 3.8 cm (11?2 in.) hose connections for use by trained occupants. Hose connections should be fitted with hose lines and combination straight stream fog nozzles. Waterflow through the standpipe system should activate an audible fire alarm system on the premises. For laboratory buildings where trained personnel are available, Class III standpipe systems can be installed.

46 Page 37 of 126 First Revision No. 31-NFPA [ Section No ] Hose lines shall be of an approved type and shall be tested and maintained in accordance with NFPA 1962, Standard for the Inspection, Care, and Use of Fire Hose, Couplings, and Nozzles and the Service Testing of Fire Hose. Submittal Date: Tue Apr 23 14:26:37 EDT 2013 Response Message: Clarifies paragraph to require Class 1 standpipe system. Paragraph is no longer needed after clarification to paragraph position is to specify Class I systems since Class II and III systems are not typically installed and since trained personnel are not typically available in laboratory buildings.

47 Page 38 of 126 First Revision No. 67-NFPA [ Section No ] Certain critical areas shall require special consideration, including, Fire prevention procedures shall include, but not be limited to, the following: (1) Handling and storage of chemicals, flammable and combustible liquids, pyrophoric and other reactive compounds, and compressed gases (2) Open flame and spark-producing equipment work permit system (3) Arrangements and use of portable electrical cords (4) Smoking area controls Submittal Date: Wed May 01 15:05:41 EDT 2013 This entire paragraph is very vague. Except for the listed items, the certain critical areas, which are not limited to the listed items, are not specified. For the listed items, the special considerations are not specified. The NFPA Manual of Style prohibits unenforceable terms in standards. This paragraph can be deleted from NFPA 45 without resulting in any significant change in the intent of the standard. Response Message: Public Input No. 14-NFPA [Section No ]

48 Page 39 of 126 First Revision No. 107-NFPA [ Section No ] Provisions Within the Emergency Action Plan. Plans for laboratory emergencies shall be developed, which established. The emergency action plan shall include the following procedures in the event of a chemical emergency, fire, or explosion : (1) Alarm activation Procedures for sounding the alarm (2) Evacuation and building re-entry procedures Procedures for notifying and coordinating with the fire department, governmental agencies, or other emergency responders or contacts, as required (3) Shutdown procedures or applicable emergency operations for equipment, processes, ventilation devices, and enclosures Procedures for evacuating and accounting for personnel, as applicable (4) Fire-fighting operations Procedures for establishing requirements for rescue and medical duties for those requiring or performing these duties (5) Non-fire hazards Procedures and schedules for conducting drills (6) Information as required by the AHJ to allow the emergency responders to develop response tactics Procedures for shutting down and isolating equipment under emergency conditions to include the assignment of personnel responsible for maintaining critical functions or for shutdown of process operations (7) Appointment and training of personnel to carry out assigned duties, including steps to be taken at the time of initial assignment, as responsibilities or response actions change, and at the time anticipated duties change (8) Alternative measures for occupant safety, when applicable (9) Aisles designated as necesssary for movement of personnel and emergency response (10) Maintenance of fire protection equipment (11) Safe procedures for startup to be taken following the abatement of an emergency [ 400: ] Submittal Date: Thu May 09 09:32:03 EDT 2013

49 Page 40 of 126 Response Message: Substantiation: The committee modified the requirements for emergency plans to provisions that are needed to address the multiple aspects of emergency to fires and other types of emergencies that can and have occurred in laboratories. This material has been extracted from NFPA 400, the Hazardous Materials Code

50 Page 41 of 126 First Revision No. 33-NFPA [ New Section after ] 6.6 Fire Retardant Clothing * Fire-retardant lab coats shall be worn where pyrophoric reagents are used outside the inert atmosphere of a glovebox * Fire-retardant gloves shall be worn whenever possible where pyrophoric reagents are used outside the inert atmosphere of a glovebox * Natural fiber clothing shall be worn under fire-retardant lab coats and on the legs and feet where pyrophoric reagents are used outside the inert atmosphere of a glovebox Fire-retardant clothing shall meet the requirements of NFPA 2112, Standard on Flame-Resistant Garments for Protection of Industrial Personnel Against Flash Fire. Supplemental Information File Name 45_FR_33_Annex_Material.doc Description Submittal Date: Tue Apr 23 14:38:12 EDT 2013 Response Message: the committee believes that fire retardant clothing is necessary to prevent serious injuries or death when pyrophoric reagents are used outside the inert atmosphere of a glovebox in the event of an accidental release of a pyrophoric reagent on lab worker s clothing.

51 Annex material for FR 33 A Fire-retardant lab coats should be considered when handling flammable liquids and other hazardous materials that are easily ignited. A Fire-resistant gloves can also absorb hazardous liquids and consideration must be given to using the gloves in conjunction with appropriate chemically resistant gloves. A Synthetic clothing can catch fire easily and/or melt in a fire. Natural fiber clothing tends to char instead of melt when exposed to flames or high temperatures

52 Page 42 of 126 First Revision No. 1-NFPA [ Section No ] This chapter shall apply to laboratory exhaust systems, including chemical fume hoods, local ventilated enclosures, fume arms, special local exhaust devices, and other systems for exhausting air from laboratory work areas in which flammable gases, vapors, or particulate matter are released. Submittal Date: Sat Apr 20 16:46:34 EDT 2013 Response Message: Input from ventilation task group. The Technical added additional types of ventilation equipment to the scope.

53 Page 43 of 126 First Revision No. 2-NFPA [ New Section after ] If laboratory exhaust ventilation is out of service or inoperable, all laboratory operations shall be suspended until the deficiency is corrected. All hazardous materials shall be secured in a safe condition or removed from the laboratory during the time that the deficiency exists. Submittal Date: Sat Apr 20 17:01:20 EDT 2013 Response Message: Ventilation Task Group proposed change to address hazards that may be present when exhaust ventilation is not functioning.

54 Page 44 of 126 First Revision No. 3-NFPA [ Section No ] * Global FR-11 Hide Deleted Devices that could result in recirculation of exhaust air or exhausted contaminants shall not be used unless designed in accordance with Section 4:10.1, Nonlaboratory Air, and Section 4:10.2, General Room Exhaust, of ANSI/AIHA Z9.5, Laboratory Ventilation. Energy conservation devices shall only be used in a laboratory ventilation system when evaluated and approved by a qualified person. These systems must meet, or exceed, the criteria established by Section and Section of ANSI/AIHA Z , Laboratory Ventilation. Systems that recirculate within their respective laboratory work area, such as fan coil units for sensible heat loads, are exempt from these requirements * Global FR-11 Hide Deleted Energy conservation devices shall be designed and installed in a manner that safely facilitates anticipated service and maintenance requirements and does not adversely impact the proper operation of the exhaust system. Submittal Date: Sat Apr 20 17:07:05 EDT 2013 Response Message: The TC revised this section to update to the current ANSI Z9.5 standard and to clarify the use of energy conservation devices in laboratory exhaust.

55 Page 45 of 126 First Revision No. 4-NFPA [ Section No ] 8.4.9* Canopy hoods, laminar flow cabinets, and ductless enclosures shall not be used in lieu of chemical fume hoods. Submittal Date: Sat Apr 20 17:16:34 EDT 2013 Response Message: TC added additional equipment to this section will be deleted as it is pulled into this section.

56 Page 46 of 126 First Revision No. 5-NFPA [ Section No ] Laminar flow cabinets shall not be used in lieu of chemical fume hoods. Submittal Date: Sat Apr 20 17:19:11 EDT 2013 Combined with Response Message:

57 Page 47 of 126 First Revision No. 85-NFPA [ Section No ] Connection to a common chemical fume hood exhaust duct system shall be permitted to occur within a building only in any of the following locations: (1) Mechanical A mechanical room, not connected to a shaft, which shall be protected in accordance with Table (2) Shaft A shaft or a mechanical room connected to a shaft, which shall be protected in accordance with the chapter for on protection of vertical openings of NFPA 101, Life Safety Code (3) A point outside the building Submittal Date: Thu May 02 15:54:36 EDT 2013 Response Message: TC added material to clarify the separation requirements from nonprotected places

58 Page 48 of 126 First Revision No. 6-NFPA [ Section No. 8.6 ] 8.6* Duct Velocities. Duct velocities of laboratory exhaust systems shall be high enough to minimize the deposition of liquids or condensable solids in the exhaust systems during normal operations in the chemical fume hood If dirt, dust, or particulate generation in significant amounts is expected in a hood, then other measures such as separate dust filtration systems shall be required If significant amounts of condensable vapors are generated in the hood, then other measures such as condensing systems for condensate traps shall be provided. Supplemental Information File Name 45_FR6_Annex_Material.doc Description Submittal Date: Sat Apr 20 17:21:43 EDT 2013 Response Message: TC believes that additional controls are needed to address accumulation of dust and condensate in duct work.

59 FR6 Annex Material A.8.6 Consideration for maintaining minimum duct velocities in the exhaust system should be given when using VAV or low-flow fume hoods. Reducing the volume of air exhausted through fume hoods can increase the potential for low transport velocities within the exhaust system. Low velocities in the exhaust system can result in the accumulation of dust particicles as well as condensation from condensable vapors

60 Page 49 of 126 First Revision No. 78-NFPA [ Section No. 8.8 [Excluding any Sub-Sections] ] (See also and Section 8.11.) Submittal Date: Thu May 02 13:00:15 EDT 2013 Response Message: covers ventilation and not construction and should not be referenced in 8.8 on construction. Public Input No. 20-NFPA [Section No. 8.8 [Excluding any Sub-Sections]]

61 Page 50 of 126 First Revision No. 108-NFPA [ New Section after ] Chemical fume hoods shall meet the requirements of UL 1805, Standard for Safety Laboratory Hoods and Cabinets, or other approved standards. Submittal Date: Thu May 09 10:55:09 EDT 2013 Response Message: Technical has added new requirement to meet UL or equivalent standards.

62 Page 51 of 126 First Revision No. 121-NFPA [ Section No ] * When Where a fume hood is unattended, its sash shall remain fully closed. Supplemental Information File Name 45_FR_121_Annex_Material.doc Description Submittal Date: Fri May 10 15:03:03 EDT 2013 Add designation for new Annex text Response Message:

63 FR 121 Annex Material A It is not the intent of this standard to require automatic sash closing devices.

64 Page 52 of 126 First Revision No. 109-NFPA [ Section No ] 8.8.7* Measuring Device for Hood Airflow. Hood Proper Function Alarm. A measuring device for indicating that the hood airflow remains within safe design limits shall be provided on each chemical fume hood * The measuring device for hood airflow shall be a permanently installed device and shall provide continuous indication to the hood user of adequate airflow and alert inadequate hood airflow by a combination of an audible and visual alarm. Where an audible alarm could compromise the safety of the user or the research, alternative means of alarm shall be considered The measuring device for hood airflow shall provide constant indication to the hood user of adequate or inadequate hood airflow. Supplemental Information File Name 45_FR_109_Annex_Material.doc Description Submittal Date: Thu May 09 11:00:17 EDT 2013 Response Message: The Technical revised the requirements for hood flow alarms so that the alarm will indicate proper function versus airflow. This will give a "go/no-go" indication of proper hood function.

65 FR 109 Annex Material A Where a laboratory exhaust system can be overdrawn (as in a VAV system, for which it is assumed that all hoods are not at full capacity all the time the so-called diversity factor) the hood alarm provides immediate warning to all users that their hood is no longer working properly. Hence, an indication that the exhaust system capacity has been breached is not required, although it might be desired by the owner. A The intent of previous versions of this standard was to provide a local device that alerted users to improper hood performance. However, many commercially common installations showed face velocities that varied slightly, particularly during operation. This has led to frequent "alarms" even when the hoods were still within their design limits. Hence a Go/No Go-type sensor is actually preferred. ANSI/AIHA Z9.5, Laboratory Ventilation, recommends alarming if the average face velocity deviates by 20 percent or more; other sources and industry practice has suggested tighter limits of 10 percent.

66 Page 53 of 126 First Revision No. 79-NFPA [ Section No ] * Automatic fire protection extinguishing systems shall not be required provided in chemical fume hoods or exhaust systems except in the following cases: (1) Existing hoods having interiors with a flame spread index greater than 25 in which flammable liquids are handled. (2) If a hazard assessment shows determines that an automatic extinguishing system is required for the chemical fume hood, then the applicable automatic fire protection system standard shall be followed. Submittal Date: Thu May 02 13:02:32 EDT 2013 Response Message: Technical modified requirement to make it a positive, not a negative requirement

67 Page 54 of 126 First Revision No. 80-NFPA [ Section No ] The fire extinguishing system shall be suitable designed to extinguish fires within the chemical fume hood under the anticipated conditions of use. Submittal Date: Thu May 02 13:40:31 EDT 2013 A suitable fire extinguishing system is vague, subjective, and unenforceable. The NFPA Manual of Style prohibits unenforceable terms in standards. Providing a fire protection system in accordance with would be deemed to comply with the intent of Paragraph can be deleted from NFPA 45 without resulting in any significant change in the intent of the standard. Response Message: Public Input No. 21-NFPA [Section No ]

68 Page 55 of 126 First Revision No. 143-NFPA [ Section No [Excluding any Sub-Sections] ] The design and installation of ducts from chemical fume hoods shall be in accordance with NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, except that specific requirements in NFPA 45 shall take precedence. Supplemental Information File Name 45_8.10.3_Annex_Material.doc Description Submitter Full Name: Susan Bershad Organization: National Fire Protection Assoc Submittal Date: Thu Jun 20 10:12:37 EDT 2013 New annex material was added to section Response Message:

69 Annex Material A NFPA 91, Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, (see 4.1.2), states that incompatible materials shall not be conveyed in the same system. Paragraphs and allow exhaust ducts within a laboratory unit to be combined. The apparent inconsistency is due to the focus of both standards. NFPA 45 assumes that in normal routine laboratory operations, the amount of materials released into the exhaust system is small and will be diluted below any levels of concern.

70 Page 56 of 126 First Revision No. 8-NFPA [ Section No ] * Automatic fire dampers shall not be used in chemical fume hood laboratory exhaust systems connected to fume hoods. Any exhaust ducts conveying fume hood exhaust passing through a fire rating shall provide an alternative means of protection equal to the rating in which it passes or greater through one of the following methods: (1) Wrapped or encased with listed or approved materials having a fire resistance rating equal to the fire rating after exiting the originating fire compartment for a minimum distance of 3.05 m (10 ft) beyond the opening. [ 91: (1)] (2) Constructed of materials and supports having a minimum fire resistance rating equal to the fire barrier. [ 91: (2)] (3) When a branch duct from a fume hood and/or lab exhaust connects to a common riser located in a shaft enclosure that must travel upward, then the connection shall be made utilizing a separate upturned steel subduct of at least 22 gauge and a length of at least 0.56 m (22 in.) prior to joining the riser manifold from each separate branch duct entering the shaft entrance. Submittal Date: Sat Apr 20 17:44:20 EDT 2013 Response Message: Technical added requirements to provide alternative means of protection for ducts that have to pass through fire rated barriers where we do not want to utilize a fire damper.

71 Page 57 of 126 First Revision No. 82-NFPA [ Section No ] Proper door Door operation for egress shall be maintained when the supply system shuts down and the lab exhaust system operates, creating a pressure differential. Submittal Date: Thu May 02 14:13:41 EDT 2013 "Proper door operation is vague. It should be sufficient to simply state that Door operation shall be maintained... If the committee desires to be more specific on door operation, the standard might specify that the force to open existing side-hinged swinging doors shall not exceed 50 lbf (222 N) applied to the latch style, which is the requirement for egress doors in NFPA 101. Response Message: Public Input No. 22-NFPA [Section No ]

72 Page 58 of 126 First Revision No. 110-NFPA [ New Section after ] 8.11* Inert Atmosphere Glove Boxes * Glove boxes shall be designed and operated in accordance with Section 4.1 of ANSI/AIHA Z9.5, Laboratory Ventilation Glove boxes that are vented shall be vented to the chemical exhaust system Glove boxes shall be operated at a positive pressure to keep air and water vapor out of the glove box Glove boxes shall be provided with pressure control to limit the pressure inside them Pressure relief shall be provided for glove boxes. Reliance on component failure, such as glove blowout, is not considered pressure relief. Supplemental Information File Name 45_FR_110_Annex_Material.doc Description Submittal Date: Thu May 09 11:18:23 EDT 2013 Response Message: The committee added the requirements for inert atmosphere glove boxes to address the need for equipment to prevent fires caused by air and water reactive chemicals.

73 FR 110 Annex Material FR 110 Annex Material A.8.11 Inert atmosphere glove boxes are used to provide a controlled environment where pyrophoric reagents, water-reactive materials, and air-sensitive materials can be handled to prevent these chemicals from reacting with air or water vapor in the air. A Additional fire protection, design, and operating criteria can be found in AGS-G , Standard of Practice for Glovebox Fire Protection.

74 Page 59 of 126 First Revision No. 83-NFPA [ Section No ] * Perchloric acid heated above ambient temperatures shall only be used in a chemical fume hood specifically designed for its use and identified as follows: FOR PERCHLORIC ACID OPERATIONS Exception: Hoods not specifically designed for use with perchloric acid shall be permitted to be used where the vapors are trapped and scrubbed before they are released into the hood. (See also ) * Perchloric acid shall be permitted to be used in a chemical fume hood that is not specifically designed for perchloric acid operations where the vapors are trapped and scrubbed before they are released into the hood. Supplemental Information File Name 45_FR_83_Annex_Material.doc Description Submittal Date: Thu May 02 14:17:25 EDT 2013 Response Message: TC modified the text to delete the exception, clarify the text, and move the information to a new requirement. Public Input No. 23-NFPA [Section No ]

75 FR 83 Annex Material A.8.11 See also Chapter 16 of the ASHRAE HVAC Applications Handbook for design guidance on the installation of perchloric acid ducts.

76 Page 60 of 126 First Revision No. 9-NFPA [ Section No ] Deficiencies in hood performance shall be corrected, or one of the following shall apply: The activity within the hood shall be restricted to the capability of the hood. The hood shall not be used. result in immediate suspension of all activities inside the hood until the deficiencies are corrected. Submittal Date: Sat Apr 20 17:55:53 EDT 2013 Response Message: TC modified the text to require suspension of operations in a fume hood that is not operating properly.

77 Page 61 of 126 First Revision No. 39-NFPA [ New Section after ] Chemical Inventories Handling and storage of chemicals shall be in accordance with NFPA 400, Hazardous Materials Code, except as specifically modified in Chapters 9 and 10. Submittal Date: Tue Apr 23 15:17:25 EDT 2013 Response Message: For materials other than flammable and combustible liquids, it is the intent of NFPA 45 to provide appropriate references to other NFPA standards, but not specifically call out maximum allowable quantities. Paragraphs and , for example, provide guidelines for the quantity of compressed and liquefied gases in Class A-D laboratory units with references to NFPA 55, Compressed Gases and Cryogenic Fluids Code. NFPA 400, Hazardous Materials Code is not currently a referenced publication of NFPA 45. This standard consolidates all fire and life safety requirements applicable to handling, storage, and use of hazardous materials into one single comprehensive resource. The proposed modifications add this standard to the list of referenced publications in Chapter 2, for broad application, and also add a specific reference to Chapter 9, addressing circumstances not specifically included in NFPA 45, but applicable to laboratory environments.

78 Page 62 of 126 First Revision No. 74-NFPA [ Section No ] * Class I flammable liquids and Class II combustible liquids that are not in use inside of laboratory units shall be stored in safety cans; in approved storage cabinets constructed in accordance with NFPA 30, Flammable and Combustible Liquids Code, and ANSI/UL 1275, Standard for Flammable Liquid Cabinets, or other approved standards ; or in an inside liquid storage area. Submittal Date: Thu May 02 08:27:16 EDT 2013 Response Message: Moved annex text from to this section. added other approved cabinets to include the use of other cabinets that are acceptable to the AHJ.

79 Page 63 of 126 First Revision No. 40-NFPA [ New Section after ] Global FR-40 Combustible waste materials and refuse as defined in NFPA 1, Fire Code (see and ), and NFPA 400, Hazardous Materials Code (see ), shall be handled in accordance with Chapter 19 of NFPA 1. Hide Deleted Submittal Date: Tue Apr 23 15:19:53 EDT 2013 Response Message: : Addition of paragraph to address combustible waste materials increases the comprehensiveness of NFPA 45: 9.3, Waste handling and Disposal, while recognizing/referencing existing NFPA standards that deal with combustible waste materials/refuse.

80 Page 64 of 126 First Revision No. 41-NFPA [ Section No ] Waste chemicals shall be handled and stored according to the requirements in Section 9.2and NFPA 400, Hazardous Materials Code Global FR-40 Combustible waste materials and refuse as defined in NFPA 1, Fire Code (see and ), and NFPA 400, Hazardous Materials Code (see ), shall be handled in accordance with Chapter 19 of NFPA 1. Hide Deleted Submittal Date: Tue Apr 23 15:23:21 EDT 2013 Response Message: : Inclusion of reference to NFPA 400, Hazardous Materials Code, broadens the scope of section 9.3 beyond flammable and combustible liquids that are currently referenced in tables and

81 Page 65 of 126 First Revision No. 44-NFPA [ Section No ] The density and total amount of flammable and combustible liquids in use, including waste, in laboratory work areas and in the laboratory unit outside of flammable liquid storage rooms shall not exceed the quantities presented in Table (a) and Table (b) for the respective class of laboratory. Table (a) Maximum Quantities of Flammable and Combustible Liquids in Laboratory Units Outside of Inside Liquid Storage Areas (Metric) Laboratory Unit Fire Hazard Class Flammable and Combustible Liquid Class a Quantities in Use a Maximum Quantity b per 9.3 m 2 of Laboratory Unit c Maximum Quantity b per Laboratory Unit Quantities in Use and Storage a Maximum Quantity b per 9.3 m 2 of Laboratory Unit c Maximum Quantity b per Laboratory Unit L L L L A I (high fire I, II, and IIIA hazard) B d I (moderate I, II, and IIIA fire hazard) C e I (low fire I, II, and IIIA hazard) D e I (minimal fire I, II, and IIIA hazard) Note: For maximum container sizes, see Table a The maximum amount in use in open systems is limited to 10 percent of the quantities listed. b See for additional requirements for educational and instructional laboratories. c The quantities per 9.3 m 2 do not imply the quantities must be within that 9.3 m 2 area; the quantities per 9.3 m 2 are for calculation purposes to determine the total quantity allowed per laboratory work area and the total amount overall in the laboratory unit. d Reduce quantities by 50 percent for B laboratory units located above the 3rd floor. e Reduce quantities by 25 percent for C and D laboratory units located on the 4th 6th floors of a building, and reduce quantities by 50 percent for C and D laboratory units located above the 6th floor.

82 Page 66 of 126 Table (b) Maximum Quantities of Flammable and Combustible Liquids in Laboratory Units Outside of Inside Liquid Storage Areas (U.S. Customary Units) Laboratory Unit Fire Hazard Class Flammable and Combustible Liquid Class a Quantities in Use a Maximum Quantity b per 100 ft 2 of Laboratory Unit c Maximum Quantity b per Laboratory Unit Quantities in Use and Storage a Maximum Quantity b per 100 ft 2 of Laboratory Unit c Maximum Quantity b per Laboratory Unit gal gal gal gal A I (high fire I, II, and IIIA hazard) B d I (moderate I, II, and IIIA fire hazard) C e I (low fire I, II, and IIIA hazard) D e I (minimal fire I, II, and IIIA hazard) Note: For maximum container sizes, see Table a The maximum amount in use in open systems is limited to 10 percent of the quantities listed. b See for additional requirements for educational and instructional laboratories. c The quantities per 100 ft 2 do not imply the quantities must be within that 100 ft 2 area; the quantities per 100 ft 2 are for calculation purposes to determine the total quantity allowed per laboratory work area and the total amount overall in the laboratory unit. d Reduce quantities by 50 percent for B laboratory units located above the 3rd floor. e Reduce quantities by 25 percent for C and D laboratory units located on the 4th 6th floors of a building, and reduce quantities by 50 percent for C and D laboratory units located above the 6th floor.

83 Page 67 of 126 Submittal Date: Tue Apr 23 15:28:44 EDT 2013 Response Message: The intent of NFPA 45 is for the maximum allowable quantities outlined in Tables (a) and (b) to be inclusive of both new and waste materials. The revision to paragraph removes the attribute in use in order to emphasize that the standard is addressing the total amount of flammable and combustible liquids in the laboratory work area, inclusive of new and waste materials.

84 Page 68 of 126 First Revision No. 45-NFPA [ Section No ] * Container types and maximum capacities for flammable and combustible liquids shall comply with Table except as follows: (1) Glass containers as large as 4 L (1 gal) shall be permitted to be used if all the following conditions are present: (a) (b) (c) Excessive corrosion or degradation of a metal or an approved plastic container would result. The glass container size allowed in Table is not available. The glass containers are required for purity purposes. (2) Containers of not more than 227 L (60 gal) capacity shall be permitted in a separate area inside the building if the inside area meets the requirements of NFPA 30, Flammable and Combustible Liquids Code. (3) In educational and instructional laboratory work areas, containers for Class I or Class II liquids shall not exceed the following capacity: (a) (b) Safety cans of 8 L (2.1 gal) Other containers of 4 L (1 gal) Table Maximum Allowable Container Capacity Combustible Flammable Liquids a Liquids a Container Type IA IB IC II IIIA Glass Metal (other than DOT/UN drums) or approved plastic Safety cans Metal container (DOT/UN specification) Polyethylene (DOT Specification 34, UN 1H1, or as authorized by DOT special permit) Pressurized liquid dispensing container 500 ml 1 L (1 4 L (1 (1 pt) b qt) b gal) 4 L (1 gal) 4 L (1 gal) 20 L (5 gal) 20 L (5 20 L (5 20 L (5 20 L (5 gal) c gal) c gal) c gal) 10 L 20 L (5 20 L (5 20 L (5 ( L (5 gal) c gal) c gal) c gal) c gal) 4 L (1 gal) 4 L (1 gal) 20 L (5 gal) 20 L (5 20 L (5 227 L (60 gal) c gal) c gal) c 20 L (5 20 L (5 227 L (60 gal) c gal) c gal) c 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) Note: This table is based on Table of NFPA 30, Flammable and Combustible Liquids Code, except for allowable quantities of flammable liquids in metal (DOT/UN specification) drums and pressurized liquid dispensing containers. a See B.1 for definitions of the various classes of flammable and combustible liquids.

85 Page 69 of 126 b See (1) and A c See (3). Supplemental Information File Name Table_ docx Description Submittal Date: Tue Apr 23 15:38:08 EDT 2013 Response Message: The footnote of the table is changed to the correct reference in NPFA 30

86 Table Maximum Allowable Container Capacity Flammable Liquids a Combustible Liquids a Container Type IA IB IC II IIIA Glass 500 ml (1 pt) b Metal (other than DOT drums) or approved plastic Safety cans 10 L (2.6 gal) c Metal container (DOT specification) Polyethylene (DOT Specification 34, UN 1H1, or as authorized by DOT special permit) Pressurized liquid dispensing container 1 L (1 qt) b 4 L (1 gal) 4 L (1 gal) 20 L (5 gal) 4 L (1 gal) 20 L (5 gal) c 20 L (5 gal) c 20 L (5 gal) c 20 L (5 gal) 20 L (5 gal) c 20 L (5 gal) c 20 L (5 gal) c 20 L (5 gal) 4 L (1 gal) 20 L (5 gal) c 20 L (5 gal) c 227 L (60 gal) c 227 L (60 gal) 4 L (1 gal) 20 L (5 gal) c 20 L (5 gal) c 227 L (60 gal) c 227 L (60 gal) 20 L (5 gal) 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) 227 L (60 gal) Note: This table is based on Table of NFPA 30, Flammable and Combustible Liquids Code, except for allowable quantities of flammable liquids in metal (DOT specification) drums and pressurized liquid dispensing containers. a See B.1 for definitions of the various classes of flammable and combustible liquids. b See (1) and A c See (3).

87 Page 70 of 126 First Revision No. 86-NFPA [ Section No ] Electric motors shall be suitable for Class I, Division 2, locations when flammable and combustible liquids or flammable gas concentrations can produce hazardous concentrations of flammable mixtures. Exception: Electric motors shall be exempt from this requirement if they are located in chemical fume hoods or provided with special local ventilation that will prevent flammable concentrations of gases or vapors from reaching the motor Electric motors that are located in chemical hoods or provided with special ventilation that will prevent flammable concentrations of gases or vapors from reaching the motor shall not be required to be listed or labeled for Class I, Division 2, hazardous locations. Submittal Date: Thu May 02 16:52:15 EDT 2013 The NFPA Manual of Style prohibits the use of exceptions in this manner. The proposed revision deletes the exceptions and creates an new paragraph that contains the intent of the deleted exception. Response Message: Public Input No. 26-NFPA [Section No ]

88 Page 71 of 126 First Revision No. 88-NFPA [ Section No ] * Cylinders shall be secured from tipping over by holders designed for such that service. Submittal Date: Fri May 03 08:33:30 EDT 2013 Response Message: Add asterisk for Annex text. Text should be under , not

89 Page 72 of 126 First Revision No. 19-NFPA [ Section No ] Where the source cylinder is outside of the laboratory work area, a station regulator and inlet pressure gauge shall be installed at the point of use to show outlet pressure.. Submittal Date: Mon Apr 22 19:37:06 EDT 2013 Response Message: The words work area were added to clarify that the requirement applies to laboratory work areas.

90 Page 73 of 126 First Revision No. 87-NFPA [ Section No ] An emergency gas shutoff device in an accessible location at the exit near one of the egress doors from the laboratory work area shall be provided in addition to the manual point-of-use valve in each educational and instructional laboratory space that has a piped gas dispensing gas dispensing valve. Submittal Date: Fri May 03 08:23:01 EDT 2013 Some code officials are interpreting the phrase "exit" to mean at the stairway door or door that leads to the outside. I think the intent was to have the device inside the room near the exit access door that typically leads to a building corridor. Response Message: Public Input No. 31-NFPA [Section No ]

91 Page 74 of 126 First Revision No. 49-NFPA [ Section No [Excluding any Sub-Sections] ] Experiments and tests conducted in educational and instructional laboratory units shall be under the direct supervision of an instructor. Submittal Date: Wed Apr 24 17:55:21 EDT 2013 Response Message: This statement is not needed in this section with the addition of a new chapter on Educational and Instructional laboratories

92 Page 75 of 126 First Revision No. 114-NFPA [ New Section after ] Pyrophoric Reagent and Water Reactive Material Handling Pyrophoric reagents and water reactive solids and liquids shall be handled in systems or enclosures that prevent the chemicals from igniting when a dry or an inert atmosphere is required by the manufacturer or the safety data sheet Pyrophoric reagents shall be handled only by those with experience in their hazards and properties or under close, direct supervision by those with experience in their hazards and properties. No one should work alone with pyrophoric reagents during transfer or cleanup operations Personal Protective Equipment shall be worn as required in Section * Pyrophoric liquids dispensed in a chemical fume hood shall be from sure-seal-type bottles with syringes or double-tipped needles in accordance with the manufacturer s recommendation and nationally established laboratory safety practices Open dispensing of pyrophoric liquids shall be done inside of an inert atmosphere glove box Pyrophoric solids shall be handled/dispensed inside of an inert atmosphere glove box Water reactive solids that are not protected by mineral oil or solvents shall be handled/dispensed inside of an inert atmosphere glove box Residual moisture and contaminates shall be cleaned from reaction vessels, glassware, needles, and other lab equipment that will be exposed to pyrophoric reagents and water reactive materials. Equipment shall be purged with a highpurity dry inert gas prior to use The void space at the top of containers of pyrophoric reagents shall be backfilled with a high-purity dry inert gas as the reagent is removed Needles, spatulas, wipes, and tools that have been in contact with pyrophoric reagents and water reactive materials shall be stored in an inert atmosphere or shall be neutralized in accordance with the manufacturer s written instructions Pyrophoric reagents and water reactive materials in glove boxes shall be sealed in airtight containers when the chemicals are not in use. Supplemental Information File Name FR_114_Annex_Material.docx Description

93 Page 76 of 126 Submittal Date: Thu May 09 13:44:57 EDT 2013 Response Message: The committee added the requirements for pyrophoric reagents and water reactive materials to provide the safe handling practices to prevent fires and injuries.

94 FR 114 Annex Material A For acceptable methods of handling pyrophoric reagents, see "Methods for the Safe Storage, Handling, and Disposal of Pyrophoric Liquids and Solids in the Laboratory," from the Journal of Chemical Health and Safety.

95 Page 77 of 126 First Revision No. 116-NFPA [ New Section after ] Open Flame Operations Laboratory operations using open flames shall be performed in accordance with the following requirements: (1) Whenever possible, alternative methods to the use of open flames, such as heating mantels, hot plates, glass bead sterilizers, or infrared loop sterilizers, shall be used. (2) Hoses/tubing connecting a gas supply to a torch or Bunsen burner shall be in good condition, compatible with the gas being used, and rated at least 150 percent of working pressure. Tubing connections shall be clamped at the gas supply and torch/burner. (3) Open flame equipment with a small gas cylinder attached shall be handheld, clamped, or weighted to prevent equipment from falling over. (4) If open flame operations are performed outside a hood, operations shall not be conducted under shelves, cabinets, or other overhanging equipment Biological operations using open flames and flammable liquids shall be performed in accordance with and the following requirements: (1) The volume of flammable liquid in use in an open container shall be limited to 50 ml or less. The container of flammable liquid shall be glass or metal and shall have a tight fitting, slip-on lid to seal the container when not in use or if the flammable liquid catches on fire. (2) The container of flammable liquid shall be kept as far as possible from the open flame but not less than m (12 in.). (3) Flammable liquids and other hazardous materials that are not used for open flame operations shall be placed in storage. (4) Combustible materials shall be kept at least m (2 ft) away from the open flame and the container of flammable liquid. Absorbent paper shall not be used under the open flame operation. Submittal Date: Thu May 09 14:13:56 EDT 2013

96 Page 78 of 126 Response Message: The committee added requirement for open flame operations to provide controls to prevent fires and injuries associated with these operations.

97 Page 79 of 126 First Revision No. 52-NFPA [ Section No ] * Domestic refrigerators, freezers, and other cooling equipment shall be permitted to store or cool flammable liquids if modified as follows: (1) Any electrical equipment located within the outer shell, within the storage compartment, on the door, or on the door frame shall meet the requirements for Class I, Division 1 locations, as described in Article 501 of NFPA 70, National Electrical Code. (2) Electrical equipment mounted on the outside of the storage compartment shall be installed in one of the following ways: (a) (b) (c) To meet the requirements for Class I, Division 2 locations To be located above the storage compartment To be located on the outside surface of the equipment where exposure to hazardous concentrations of vapors will be minimal Submittal Date: Wed Apr 24 19:01:24 EDT 2013 Response Message: The committee modified the requirements for refrigerators, freezers and other cooling equipment used to store or cool flammable liquids be listed equipment for the intended purpose. The committee deleted the provision in Section of the 2011 edition that allow the modification of domestic refrigerators, freezers and other cooling equipment since listed equipment is commercially available. The intent of this proposed revision is stated in the Annex material as follows, In general, the design features of a commercially available laboratory-safe refrigerator are such that they provide important safeguards not easily available through modification of domestic models.

98 Page 80 of 126 First Revision No. 94-NFPA [ Section No ] Refrigerators, freezers, and cooling equipment located in a laboratory work area designated as a Class I location, as specified in the Exception to 5.6.2, shall be approved for Class I, Division 1 or 2 locations and shall be installed in accordance with Article 501 of NFPA 70, National Electrical Code. Submittal Date: Fri May 03 09:21:14 EDT 2013 To conform to the NFPA Manual of Style, the exception to should be deleted. (See separate proposal.) The reference to the Exception to can be deleted in without creating any change in the intent of the requirement stated in Response Message: Public Input No. 28-NFPA [Section No ]

99 Page 81 of 126 First Revision No. 127-NFPA [ New Section after ] Chapter 13 Educational and Instructional Laboratory Operations 13.1 General. This chapter provides fire protection and safety requirements for new and existing educational and instructional laboratories where experiments are conducted or demonstrations are performed using hazardous materials. Note these requirements are referenced and are not retroactive. 13.2* Instructor Responsibilities. Where instructors are performing demonstrations or students are conducting experiments using hazardous materials, the instructor shall be required to perform a documented hazard risk assessment, provide a safety briefing to students, provide adequate personal protective equipment (PPE), and place a safety barrier (as required) between students and the demonstration or experiment to prevent personal injury * Instructors in teaching labs shall be trained and knowledgeable in fire safety procedures, emergency plans, the hazards present in the lab, the appropriate use of PPE, and how to properly conduct a hazard risk assessment Chemical Storage and Handling * Bulk quantities of chemicals shall be stored in a locked room outside of the classroom in educational labs. Chemicals stored and in use in an educational lab classroom shall be limited to the amount needed for one class session Quantities of chemicals in an instructional lab shall be limited to the lowest possible level necessary and in no case shall exceed the quantities specified in or the maximum allowable quantities specified in fire prevention or building codes Dispensing of bulk quantities of chemicals for an experiment or demonstration shall be performed in a prep room outside of the classroom For existing educational and instructional laboratories that do not have a separate preparation room, the dispensing of bulk quantities of chemicals for experiments or demonstrations shall be performed prior to the arrival of the students in the classroom The minimum amount of chemical(s) needed to perform the experiment or demonstration shall be transferred to a small, appropriately labeled, sealable bottle(s) or dropping bottle(s) Bottles of chemicals shall only be open in the classroom when the experiment or demonstration is being performed * Performance of Experiments or Demonstrations Experiments or demonstrations for students involving open flames; fire; or the use of flammable, reactive, toxic or corrosive chemicals shall be performed in accordance with , and , , or

100 Page 82 of 126 Experiments or demonstrations shall be performed in a location that does not block access to the primary means of egress from the laboratory work area * Demonstration-type fume hoods shall be used for experiments or demonstrations that involve or produce hazardous quantities of fumes, vapors, particulates, or gases Experiments or demonstrations that are performed outside of a fume hood where the separation distance in is not possible shall be performed behind an impact-resistant plastic or tempered glass safety shield. The shield shall be at least m (24 in.) high and shall wrap 180 around the hazard or extend at least m (12 in.) beyond the hazard in both directions. The shield shall be secured to the work surface with bolts or clamps to keep it in place Experiments or demonstrations that are performed outside of a fume hood where a shield is not utilized shall be performed in a location that is at least 3.05 m (10 ft.) from students Experiments or demonstrations using flammable liquids and open flames shall be performed by a knowledgeable instructor In educational and teaching labs where experiments are conducted by students the instructor shall be responsible for conducting a safety briefing prior to the start of each experiment to review the hazards of the chemicals used and the personal protective equipment required for the experiment Other Requirements. Educational and instructional laboratory units shall be classified in accordance with Educational laboratory units shall be provided with fire-rated separation in accordance with Life safety classification for educational and instructional laboratory units shall be in accordance with Section The allowed quantities of flammable and combustible liquids for educational and instructional laboratory units shall be in accordance with Section The allowed quantities of compressed gases for educational and instructional laboratory units shall be in accordance with Emergency gas shutoffs for educational and instructional laboratory work areas shall be in accordance with Supplemental Information File Name 45_FR_127_Annex_Material.doc Description

101 Page 83 of 126 Submittal Date: Mon May 13 08:45:51 EDT 2013 Response Message: This is a new chapter on Educational and Instructional laboratories.

102 Annex material NFPA 45 FR #127 A.N.2 A documented hazard assessment is a written evaluation of the hazards of the experiment, including the appropriate personnel protective equipment required, safe work practices, emergency procedures, and waste disposal. It is recommended that this assessment be peer reviewed. A.N.3 Instructors should be knowledgeable of the five general principles of safety as referenced in the OSHA Standard for Occupational Exposure to Hazardous Chemicals in Laboratories, Section , Appendix A - Culture of Safety. This information can be found on the OSHA website at A.N.4.1 The presence of bulk quantities (2 L or larger bottles) of chemicals in a classroom have resulted in accidents (fire) where the bottle has spilled or a fire has ignited the contents of the bottle. The fires have caused serious burn injuries to the students and instructors. A.N.4.2 For additional guidance, see Kaufman, Science Demonstrations: Safety and Liability. A.N Demonstration-type fume hoods are chemical fume hoods with an operating sash on one side and a safety glass panel on the opposite side to provide viewing of the operations in the hood and to minimize the exposure to the hazards associated with the operation in the hood.

103 Page 84 of 126 First Revision No. 92-NFPA [ Section No ] Hazards to personnel from high voltage, vapors or fumes, radiation, flames, flashbacks, and explosions shall be minimized. Submittal Date: Fri May 03 09:16:35 EDT 2013 Minimization of hazards to personnel is a highly subjective concept. Paragraph is vague, subjective, and unenforceable. The NFPA Manual of Style prohibits unenforceable terms in standards. This paragraph can be deleted from NFPA 45 without resulting in any significant change in the intent of the standard. Response Message: Public Input No. 29-NFPA [Section No ]

104 Page 85 of 126 First Revision No. 50-NFPA [ Section No ] * Content identification, including precautionary information, shall be provided directly on all original and subsequent containers of hazardous chemicals, except those being used in ongoing experiments. Supplemental Information File Name FR_50_Annex_Material.docx Description Submittal Date: Wed Apr 24 18:35:55 EDT 2013 Response Message: The committee updated and clarified the requirements for labeling on containers to include small containers and containers of chemicals that become hazardous during prolonged storage.

105 Annex Material NFPA 45 FR#50 Labels on original containers and secondary vessels that are used to store hazardous chemicals must include the chemical name and applicable hazard warnings. Microvials and other small containers of similar contents that are compatible that will not support a conventional label can be identified with a numbering system and stored in a properly labeled collection vessel. Maintain a master log of the numbered containers within the laboratory.

106 Page 86 of 126 First Revision No. 51-NFPA [ Section No ] Global FR-113 Hide Deleted Containers of materials that become hazardous during prolonged storage shall be dated upon receipt and when first opened, to facilitate hazard control. Materials shall be properly disposed of according to the expiration date and recommendations on the label and safety data sheets (SDSs) ( S s ee and A ). Submittal Date: Wed Apr 24 18:42:04 EDT 2013 Response Message: The committee updated and clarified the requirements for labeling on containers to include small containers and containers of chemicals that become hazardous during prolonged storage.

107 Page 87 of 126 First Revision No. 97-NFPA [ Section No. A.1.3 ] A.1.3 See Figure A.1.3 for determining the applicability of NFPA 45 to a lab setting other than educational or instructional labs. Existing laboratories using chemicals that are not in compliance with this standard should be permitted to be continued being used if they provide protection to life and adjoining property that is equivalent to that in this standard. Figure A.1.3 Guide for Determining the Applicability of NFPA 45 to a Laboratory Setting. Submittal Date: Fri May 03 12:57:36 EDT 2013

108 Page 88 of 126 Response Message: The Technical revised this annex text to be consistent with the change to cover all educational and instructional laboratories under NFPA 45.

109 Page 89 of 126 First Revision No. 26-NFPA [ New Section after A.5.5 ] A Almost any liquid spill could affect electrical equipment located in the immediate area. Therefore, electrical receptacles, switches, and controls should not be located on, adjacent to, or directly below horizontal surfaces where a liquid spill could directly impact the equipment. Submittal Date: Mon Apr 22 20:43:39 EDT 2013 Response Message: The Section requirement and language have been consistent in NFPA 45 for at least the last three editions. The annex language provides a little more information as it seems appropriate that the requirement would apply to all liquids as most liquids could impact electrical equipment.

110 Page 90 of 126 First Revision No. 10-NFPA [ Section No. A ] A A minimum ventilation rate for unoccupied laboratories (e.g., nights and weekends) can be as low as four room air changes per hour with proper laboratory operations and storage of chemicals. Occupied laboratories typically operate at rates greater than six air changes per hour, consistent with the conditions of use for the laboratory. Occupied laboratories should determine their supply airflow rates based on cooling requirements, amount of exhaust air required for the hoods, or exhaust devices in the lab, whichever is greatest. Use of only an air change per hour criteria is not considered proper design. Adequate ventilation shall be provided to ensure occupant safety and safe operation of exhaust devices inside the laboratory. Laboratory ventilation operating at lower rates should employ specific measures to monitor for potentially hazardous conditions and increase the ventilation automatically upon detection of any condition within 25 percent of the level of concern. If such a monitoring system is to be used, it should be fail-safe and be of such a nature that it will detect all potential leakage throughout the entire laboratory area. These systems should be reserved for locations where the anticipated contaminants can be measured reliably and activate the control system within a suffciently rapid time period to provide occupant protection. In the event of a failure of the monitoring system or control components, the ventilation system should return to the designated occupied ventilation rate. Detailed analyses of flow paths, dead pockets, and failure modes under all credible scenarios should be performed to avoid exposure. It is not the intent of this standard to require emergency or standby power for laboratory ventilation systems. Submittal Date: Sat Apr 20 18:07:26 EDT 2013 Response Message: The technical committee added additional information to address minimum unoccupied laboratory ventilation rates as well as to address considerations for other energy conservation options.

111 Page 91 of 126 First Revision No. 11-NFPA [ Section No. A ] A Consideration should be made of the potential contamination of the fresh air supply by exhaust air containing vapors of flammable or toxic chemicals when using devices for energy conservation purposes. Where fume hood exhaust is manifolded with general laboratory exhaust, energy recovery devices should be evaluated to ensure they would not recirculate contaminants through an active purge or filtration treatment. Energy recovery systems should be designed with a fail-safe alarm(s) and equipment interlocks to prevent cross contamination or recirculation from occurring, including shutdown of systems if needed. Enthalpy wheels, in particular, have potential for cross-contamination and should be carefully evaluated for all potential hazards and failure modes. A It is not the intent of the standard to prohibit or impede the use of any energy conservation devices. However, the committee is concerned that adequate design consideration should be given as to how to clean and maintain these devices as the systems age. A This might be as simple as verifying that a pressure drop remains within design levels or airflow remains within design parameters. The intent is to require some means for ensuring that dirt and buildup does not unknowingly adversely affect the effectiveness of the exhaust system. Submittal Date: Sat Apr 20 18:18:20 EDT 2013 Response Message: TC has added clarification to and and providing further guidance on the use of energy recovery devices

112 Page 92 of 126 First Revision No. 84-NFPA [ Section No. A ] A Laboratory fume hood containment can be evaluated using the procedures contained in ASHRAE 110, Method of Testing Performance of Laboratory Fume Hoods. Face velocities of 0.4 m/sec to 0.6 m/sec (80 ft/min to 120 ft/ min) generally provide containment if the hood location requirements and laboratory ventilation criteria of this standard are met. Lower flow fume hoods (those with an average face velocity or 0.3 to 0.4 m/sec (60 to 80 ft/min) are often desirable for energy conservation. Lower hood face velocities are effective with hoods designed for lower face velocities. However, many circumstances can lead to inadequate contaminant containment. These include crowding, larger equipment, high thermal loads, internal circulation from equipment and numerous other issues. Hence the owner should carefully consider all potential applications when determining the face velocity to use. In addition to maintaining proper fume hood face velocity, fume hoods that reduce the exhaust volume as the sash opening is reduced should maintain a minimum exhaust volume to ensure that contaminants are diluted and exhausted from a hood. The chemical fume hood exhaust airflow should not be reduced to less than the flow rate recommended in ANSI/AIHA Z9.5, Laboratory Ventilation. Submittal Date: Thu May 02 15:19:52 EDT 2013 Response Message: TC provided additional information for the safe use, selection, and operation of low flow fume hoods.

113 Page 93 of 126 First Revision No. 12-NFPA [ Section No. A ] A Due to their low capture efficiency, canopy hoods should only be used only for exhausting heat and nuisance odors and not for exhausting chemicals. It is not the intent of this standard to prohibit the use of ductless enclosures (often incorrectly called ductless hoods ). However, the use of such devices requires careful hazard analysis and risk assessment of all potential failure modes (mechanical, breakthrough, contamination, off gassing, etc.), how the owner is able to control uses for which the enclosure will not be adequate, how the user can continuously verify that the adsorption media is working properly, and how the spent media is to be safely removed and replaced, among numerous other concerns. The committee does not believe these enclosures are a suitable replacement for a chemical fume hood except after careful and thorough analysis. Submittal Date: Sat Apr 20 18:24:11 EDT 2013 Response Message: TC added explanatory text for clarification on the use of this type of equipment in lieu of chemical fume hoods.

114 Page 94 of 126 First Revision No. 81-NFPA [ Section No. A ] A In 2001 at the University of California, a fire resulted in an injury and caused approximately $3.5 million in damage. Based on the investigation, it was concluded that the practice of not having fire dampers on the exhaust duct of the ventilation system at the shaft wall appears to have been beneficial in this fire scenario. The investigation observed that the exhaust system was effective at removing significant quantities of combustion products from the building during the fire, thereby reducing the amount of combustion products spreading to other areas of the building. The shutting down of the supply air by fire dampers did not significantly hinder the exhaust system because fresh air was provided though a broken window. However, if the window had not failed, the team concluded that the exhaust system probably would not have performed as well. If protection of the openings is desired, one method is to use a subduct assembly. Where a branch duct connects to an enclosed exhaust riser located inside a shaft, which has a required fire resistance rating of 1 hour or more and in which the airflow moves upward, protection of the opening into the fire resistance rated enclosure should be made with a steel subduct turned upward a minimum of 0.6 m (22 in.) in length and of a minimum thickness of 22 gauge [0.76 mm (0.030 in.)]. The steel subduct should be carried up inside the riser from each inlet duct penetration. This riser should be appropriately sized to accommodate the flow restriction created by the subduct. Submittal Date: Thu May 02 14:08:36 EDT 2013 Information in the last paragraph was moved up to Response Message:

115 Page 95 of 126 First Revision No. 37-NFPA [ Section No. A.9.1 ] A.9.1 Before a hazardous chemical is ordered, controls should be established to ensure that adequate facilities and procedures are available for receiving, storing, using, and disposing of the material. Information sources include the following NFPA documents, which are contained in NFPA's Fire Protection Guide to Hazardous Materials: (1) NFPA 49, Hazardous Chemicals Data (2) NFPA 325, Guide to Fire Hazard Properties of Flammable Liquids, Gases, and Volatile Solids (3) NFPA 484, Standard for Combustible Metals (4) NFPA 491, Manual of Hazardous Chemical Reactions Submittal Date: Tue Apr 23 14:53:09 EDT 2013 Response Message: Although the references in A.9.1 contain information on hazards of chemicals that may indirectly cover combustible metals, NFPA 484 is specific to use of combustible metals and completes the list of references provided in A.9.1.

116 Page 96 of 126 First Revision No. 18-NFPA [ New Section after A ] A Due to the limited volume of lecture bottles, a chemical fume hood can provide adequate ventilation to contain leaks of hazardous gases from a lecture bottle. Submittal Date: Mon Apr 22 19:32:59 EDT 2013 Response Message: The committee wants to clarify the difference between requirements in NFPA 55 sections 6.17 and 6.18 and NFPA that allows the use of fume hoods to provide special ventilation for health hazard and pyrophoric gas in lecture bottle size cylinders.

117 Page 97 of 126 First Revision No. 89-NFPA [ New Section after A ] A Consider locating in-use compressed gas cylinders outside of the building or outside of the laboratory area in a gas storage room whenever possible. Submittal Date: Fri May 03 08:35:24 EDT 2013 Response Message: wants to add advisory text that reflects its preference for storage outside of the laboratory area.

118 Page 98 of 126 First Revision No. 54-NFPA [ Section No. A ] A Figure A gives examples of labels that can be used on laboratory refrigerators. Figure A Labels to Be Used in Laboratory Refrigerators. Submittal Date: Wed Apr 24 20:30:36 EDT 2013

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