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Report of the Committee on

Fire Department Apparatus

Howard L. McMillen, Chair City of Fort Worth Fire Dept., TX

Kenneth L. Koch, Secretary Sutphen Corp., OH

RobertJ. Barraclough, Span Instruments, TX frey Bowman, Anaheim Fire Dept., CA ph Carven, Mission College, CA

Rep. California Fire Mechanics Assn. William J. Darley, W. S. Darley & Co., IL

Rep. National Truck Equipment Assn. Ron French, Naperville,IL Dennis N. Gage, LSO Commercial Risk Services, Inc., NJ Jeffrey H. Haase, Emergency One, Inc., FL Gary Handwerk, Hale Products Inc., PA Scott H. Krueger, Pierce Manufacturing Inc., W1 Calvin S. Kunlde, Purdue University, IN Robert McKeon, Occum Volunteer Fire/Ambulance Department, CT Rep. National Volunteer Fire Council

W. Kenneth Menke, Fire Service Research Inst., MO {_~ hn P. Morello, NY Fire Dept., NY

einz E. Otte, Waterous Co., MN Carl E. Punkay, Champaign Fire Dept., IL Roger A. Ruth, Chubb National Foam Inc., PA

Rep. Fire Apparatus Manufacturers Assn. James A. Salm], Simon-Ladder Towers Inc., PA Alan Sauisbury, Saulsbury Fire Apparatus, NY BradleyJ. Schmidt, Underwriters Laboratories Inc., IL Gary B. Selig, California Dept. of Forestry, CA Joseph P. Shovlin, Security Fire Protection District, CO Stephen L. Smith, Fairfax County Fire/Rescue Dept., VA Terry M. Sutphen, University of Illinois, IL

Rep. Illinois Fire Service Institute Robert D. TutterowJr., Charlotte Fire Department, NC Alan D. Van Guilder, Reno Fire Department, NV Antonio IL ~/'dlegus, U.S. Navy, CA William yon ZehleJr., Wilton Fire Department, CT

Rep. International Association of Fire Chiefs Davad Whlte, Fire & Safety Specialists, Inc., "IX

Boyd F. Cole, Underwriters Laboratories Inc., IL (/kit. to B.J. Schmidt)

Peter F. Darley, W. S. Darley & Co., IL (Alt. to W.J. Darley)

Joseph L. Donovan, Jackson Fire Dept, MS (Alt. to W. yon Zehle)

Richard W. Dreher, Los Angeles City Fire Deparunent, Ca (Alt. toJ. P. Morello)

Ronald L. Ewers, Class I Inc., FL (Alt. to R. A. Ruth)

John McDonald, Int'l Assn. of Fire Fighers, VA (Alt. to W. IL Menke)

Michael R. Negro, Pierce Manufacturing Inc., WI (Alt. to S. H. Krueger)

Stephen Patrick Nethero, Sutphen Corp., OH (Alt. to K. L. Koch)

Gary IL Pope, Fairfax County Fire/Rescue Department, VA (Alt. to S. L. Smith)

Philip Sayer, Gait Fire Department, MO (Alt. to R. McKeon)

Edward S. Straw, ISO Commercial Risk Services Inc., GA (Alt. to D. N. Gage)

Richard E. Teske, Hale Fire Pump Co., PA (Alt. to G. Handwerk)

Tom Whitworth, Emergency One, Inc., FL (Alt. toJ. H. Haase)

Nonvoting

William F. Foley, Orland Park, IL (Member Emeritus)

Staff Liaison: Carl E. Peterson

This list represents the membership at the time the Committee was balloted on the text of this edition. Since that time, changes in the membership may have occurred,

Committee Scope: This Committee shall have primary responsibU- ity for documents on the design and performance of fire apparatus for use by the fire service.

This portion of the Technical Committee Report of the Committee on Fnm Department Apparatus is presented for adoption.

This Report on Comments was prepared by the Technical Committee on Fire Department Apparatus and documents its action on the comments received on its Report on Proposals on NFPA 1906, Standard for Wildland Fire Apparatus, as published in the Report on Proposals for the 1994 Fall Meeting.

This Report on Comments has been submitted to letter ballot of the Technical Committee on Fire Department Apparatus which consists of 50 voting members; of whom 28 voted affirmatively, and 2 ballots were not returned (Messrs. Craven and Villegas).

86

NFPA 1906 - - F94 ROC

(Log #1 $) 1906- 1 - (1-1): Accept SUBM1TTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATION: Delete last sentence:

"This apparatus is not intended for interior structural fire fighting." SUBSTANTIATION: This truck with minor loose equipment additions could meet many state minimum ISO Class 9 standards] Is it our job to say what a wildland truck could be used for, if so equipped? COMMITI'EE ACTION: Accept.

(Log #61) 1906-2- (1-3 Center of Gravity): Accept SUBMITrEPa D.W. McKenzie, Forest Servlce-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise the definition of center of gravity as follows:

Center of Gravity is the point at which the entire weight of the fire truck may be considered as concentrated so that if supported at this point the body would remain in equalibrium in any position. SUBSTANTIATION: Center of Gravity definition is not correctl

• This has to be changedl COMMrI ' rEE ACTION: Accept.

(Log #64) 1906- 3 - (1-$ Compound Gauge): Accept SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATION: Revise the definition of Compound Gauge as follows: "... zero equal atmosphere pressure ...". SUBSTANTIATION: The zero on a compound gauge is not 1 atmosphere. This must be changed. Is incorrect as it is. COMMITTEE ACTION: Accept.

(Log #6O) 1906- 4- (1-3 Dynamic Suction Lift): Accept SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATION: Revise the definition of Dynamic Suction Lift as follows: "...hose expressed in feet of water head ". SUBSTANTIATION: None. COMMITFEE ACTION: Accept.

(Log #$5) 1906- 5 - (1-3 Fully Equipped Apparatus (New)): Reject SUBMITTER: Ted Rex, Bureau of Land Management, NIFC at Boise, ID COMMENT o N PROPOSAL NO: 1906-253 RECOMMENDATION: Add a new definition: FULLY EQUIPPED • APPARATUS: Includes full water tanks, foam tanks, fuel tanks, hose complement, tool and adapter complement, the fully equipped fire fighter weights for all occupied seats in the apparatus design. SUBSTANTIATION: Provides for uniformity in design criteria. The apparatus needs to be designed with ALL items it will carry. A miscellaneous allowance should then be added. Extensive experience by the wildiand agencies has indicated this to be a major area of design shortcomings. COMMITTEE ACTION: Reject. COMMITI'EE STATEMENT: The committee is revising 3-1.1 and 3- 1.2 and feels that with the changes, the term is adequately described and does not need a separate defiriition. See committee action on public comment 1906-9 (Log #37).

(Log #30) 1906- 6 - (1-3 Miscellaneous Equipment (New)): Reject SUBMITTER= Ted Rex, Bureau of Land Management, NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-253 RECOMMF.NDATION: Additional definition: MISCELLANEOUS EQUIPMENT: Defined as that additional equipment that is required to meet specific operational requirements of the department, ie., additional hose, chain saws, rations, tow chains, tire chains, drinking water containers, ice chests, additional hand tools, and additional containers of foam concentrate.

SUBSTANTIATION: Years of wildland experience indicate these types of items ARE OR WILL be added to the apparatus and has resulted in major overloadinl~. C O M M r r r E E Ac~rION: Reject. COMMITrEE STATEMENT: While the committee is rejecting the addition of an additional definition, it is using mucllL of the text is a descriptive way in A-3-1.1. (See committee action or, public comment 1906-9 (Log #37).

(Log #94) 1906- 7 - (2-5.1 (b)): Accept in Principle SUBMITrER: Rick Isler, Washington State Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows: Apparatus designated as emergency vehicles (i.e.: red lights &

sirens) shall from a steady speed of 15 mph be able I:o accelerate to a true speed of 35 mph within 30 seconds ~ t h o u t moving the gear selector. Apparatus not designated as emergency vehicles (i.e. no red lights & siren) shall be exempt. SUBSTANTIATION: Agency apparatus are not designed as emergency vehicles. As such theyare not allowed to drive outside the normal laws of the.state. Shifting gears to accelerate is not a design flaw and should be allowed. C O M M I T I ' ~ ACTION: Accept in Principle.

Delete 2-5.1(b) and 14-10.$.2. COMMITrEE STATEMENT: The committee reviewed the requirement and feels it is no longer applicable, given the increased use of automadc transmissions and the increase in engine power available on all vehicles. The requirement is stated !in 2-5.1-(b) and the test in 14-10.3.2.

(Log#l) 1906- 8 - (3-1.1): Accept in Principle SUBMITIXR: Jim Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATION: GVWR should include all weights considered including those personnel weights considered. The 200 pound personnel weight addressed later in the document must be included in the overall GVWR consideration. SUBSTANTIATION: The entire section seems confusing. Cannot offer suggestions to improve. COMMITIqgEACTION: Accept in Principle. COMMITTEE STATEMENT: See committee action on public comment 1906-9 (Log #37).

(Log #$7) 1906- 9 - (3-1.1): Accept in Principle SUBMITrER: Ted Rex, Bureau of Land Management, NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Amend to read: The GAWRand GVWR of the chassis shall be adequate to carry the fully equipped apparatus including full water tank, fuel tanks, and all other reservoirs; the apparatus designed hose load; THE TOOL AND ADAPTER COMPLEMENT; the EQUIPPED PERSONNEL W1HGHT, and a miscellaneous equipment allowance. THE APPARATUS SHOULD BE DESIGNED TO CARRY AT LEAST THE MINIbIUM WEIGHT, AS SHOWN IN'TABLE 3-1.1, FOR MISCEI$_ANEOUS EQUIP- MENT. ' SUBSTANTIATION: This better defines the carrying capacity and design r ~ i r e m e n t . COMMITTEE ACTION: Accept in Principle. Revise 3-1.1 to read: The GAWR and GVWR of the chassis shall be

adequate to carry the fully equipped apparatus including full water tank, fuel tanks, and all other reservoirs; the apparatus designed hose load; the EQUIPPED PERSONNEL WEIGHT, and a miscellaneous and minor equipment allowance. The miscellaneous and minor equipment allowance shall be at least equal to the weight as shown in Table 3-1.1. Add an additional paragraph to A-3-1.1 as the f i~ : paragraph. The

p ~ . ~ p h should read as follows: ~fhe purchaser .~hould specify the weight of the equipment to be carried f l i t is in excess of the allowance for miscellaneous and minor equipment. This allows a chassis with an adequate GAWR and GVWR to be supplied. Specific additional equipment often required to meet operational requirements of the department could include additionhl hose, chain saws, rations, tow chains, tire chains, drinking water containers, ice chests, additional hand tools, and additional contalners of foam concentrate."

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N F P A 1906 m F 9 4 R O C

Change 3-1.2 to read: "The equipped personnel weight shall be calculated at 250 lb ( l l g kg) per person multiplied by the number of seat ingposit ions on the apparatus." Delete the current appendix to 3-1.2.

COMMITTEE STATEMENT: The committee is basically accepting the proposed change to include the equipped personnel weight and changing 3-1.2 to reflect that equipped personnel weight. In doing so the appendix to 3-1.2 is no longer applicable. It is also using the term "miscellaneous and minor equipment" with reference to the allowances in Table 3-1.1 and adding an additional paragraph to A-3-1.1 to provide additional guidance to the purchaser.

(Log #39) 1906- 10- (3-1.2): Reject SUBMrI~FERa Ted Rex, Bureau of Land Management , NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete in total. SUBSTANTIATION, Wildland agencies require personnel to carry

"a maximum of 55 ibs of personal and protective equipment. By changing the Standard to FULLY EQUIPPED fire fighter, those depar tments that carry SCBA will have the additional weight requirements already designed into the apparatus. No depar tment will have an under designed apparatus. COMMITTEE ACTION: Reject. COMMI'ITEE STATEMENT: See committee action on public comment 1906-9 (Log #37) which modifies this requirement.

(Log #14) 1906- 11 - (3-1.4): Accept SUBIV|ITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add to the end of sentence:

"or off road use only". SUBSTANTIATION: We can have off road only apparatus also. COMMITTEE ACTION: Accept.

(Log #63) 1906-12 - (3-2.1.2): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Automatic engine shutdown

Some trucks come with automatic h igh temperature shut down, do you want to take them off?. SUBSTANTIATION: None. COMMITTEE ACTION: Accept in Principle. Add wording to the end of the current sentence so the revised

sentence reads: "Automatic engine shutdown systems shall not be permitted unless they are an integral part of the standard engine management system."

Add additional wording to the appendix to read: "Some engines come with automatic engine shutdown systems as part o f the engine management system although certain chassis are available without engine shutdown systems. The purchaser should try to use an engine without a shutdown system when possible." COMMITTEE STATEMENT: While the committee feels that the safety of the fire fighter is important enough that engine shutdown systems should no t be allowed and the engine should be sacrificed if necessary to allow the fire fighters to withdraw to a safe area if the engine is failing, some engines are only available with an integrated engine shutdown system built into the engine management system. The modification of such an engine management system by an apparatus builder or a fire depar tment can void the warranty.

(Log #2) 1906- 13- (3-2.2.2): Reject SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: The last sentence talks about mount ing "so they will not accidentally open due to vibration". Need to add a portion that indicates that the drain valve will be mounted in such a way to be protected from the ground, rocks or other elements that may cause breakage. SUBSTANTIATION: Vibration of drain opening is only a small part of the problem. It is essential this drain be protected, particularly if the vehicle is to be used off-road. COMMITTEE ACTION: Reject.

COMMITrEE STATEMENT: Many drain valves are installed at the base of the radiator. There does not seem to be a problem with just drain valves being damaged. Debris that could damage a drain falve will probably damage the radiator as well. If the apparatus is to be u s e d u n d e r condiffons that could could cause such damage, vehicle protection systems as defined in Chapter 13 should be considered.

(Log #95) 1906- 14- (3-2.3.3): Reject SUBMITTEPa Rick Isler, Washington State Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete entire section. SUBSTANTIATION: All this information is in the operators manual and is / should be part of the operators training. Addition of the data plates adds to the cost of the apparatus mid is redundant. If the operator won ' t look at the manual he won' t look at another data plate. COMMITTEE ACTION: Reiect. COMMrITEE STATEMENT: Operator 's manuals are often not with the vehicle o r g e t lost and the vehicle operator may need to replenish fluids in the field.

(Log #96) 1906-15 - (3-3.3.3): Accept in Principle SUBMITTER: Rick Isler, Washington State Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

" l fa custom chassis is specified, a master load disconnect switch shall be provided between the starter solenoid(s) and the remainder of the electrical loads, with the batteries connected directly to the starter solenoid(s). The alternator shall be wired directly through the ammeter shunt(s), if one is provided, and shall not be w i r e d through the master load disconnect switch. A green "battery on" pilot light that is visible f rom the drivers position shall be provided. - I f a st,~ndard production chassis is used , the system used shall be as provided bythb chassis manufacturer." SUBSTANTIATION: We should no t need to redesign what their engineers have already created. "ff it a in ' t broke don ' t fix it". COMMITI'EE ACTION: Accept in Principle.

Move 3-3.3.3 to the appendix as an appendix i tem to 3-3.3 and revise to read: It is r e commended that a master load disconnect switch be provided between the starter solenoid(s) and the remainder of the electrical loads, with the batteries connected directly to the starter solenoid(s). The alternator should be wired directly to the batteries th rough the ammete r shunt(s), if one is Pdrovided, and should not be wired through the master load

isconnect switch. A green "battery on" pilot light that is visible from the driver's position should be provided and the purchaser may want to consider a second "battery on" pilot light on the outside of the vehicle to warn that the batteries are on when the apparatus is parked in the fire station. COMMITTEE STATEMENT: The is no t a custom chassis vrs commercial chassis issue but rather the need for this electrical a r rangement to allow the chassis and apparatus wiring to be isolated so small electrical faults do no t drain the battery when the apparatus is not running. However, the committee is willing to move this to the appendix as a recommendat ion rather than a requirement.

(Log #3) 1906- 16- (3-3.5.1): Reject SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: The Standard to include lights and warning devices is not necessary. The section would be livable i fa comment were added, something to the effect of "If anthorized or de te rmined essential by the "Agency Having Jurisdiction"." SUBSTANTIATION: Many wildland fire agencies in the west do not have the need for the elaborate warning devices in the standard. The majority of use places the equipment off-road or in sparsely populafed areas. There is no need to mandate the use o f warning lights as a standard. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: The committee feels that any vehicle that is to respond on public roads as an emergency vehicle should have warning lights. Warning lights are also necessary if the vehicle is to he useffalffng a public rBadwhile fighting fires. This is for the protection of the vehicle and the firefighters. T h e standard does not require warning lights on a vehicles which does not respond as an emergency vehicle on public rbads.

88

N F P A 1906 - - F 9 4 R O C

(Log #4) 1906- 17- (5-3.5.4): Reject SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATION: The Standard to include lights and warning devices is not necessary. The section would be livable i ra comment were added, something to the effect of "If anthorized or de te rmined essential by the 'Agency HavingJurisdiction'." SUBSTANTIATION: Many wildland fire agencies in the west do not have the need for the elaborate warning devices in the standard. The majority of use places the equipment off-road or in sparsely populated areas. There is no need to mandate the use of warning lights as a standard. COMMr][TEE ACTION: Reject. COMMITrEE S T A ~ F . , N T : The committee feels that any vehicle that is to respond on public roads as an emergency vehicle should have audible warning equipment. The standard does no t require audible warning equipment on a vehicles that does not respond as an emergency vehicle on public roads.

(Log #5) 1906- 18 - (3-3.5.6): Reject SUBMITI'ER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add a second sentence to state:

"Lights shall be arranged or protected to minimize acddental breakage." SUBSTANTIATION: It is essential that any addition outside of the body be protected from accidental breakage, to the best o f our ability, f rom limbs, branches, etc. COMMYITEE ACTION: Reject. COMMITrEE STATEMENT: As a min imum standard, the committee does no t feel dais is necessary. A lot of wildiand fire apparatus is operated in environments where it is on the road and no t subject to damage from trees and branches. The statement as proposed is also impossible to measure. Chapter 13 provides for protection of the apparatus from brush if the purchaser feels such protection is necessary.

(Log #34) 1906- 19 - (3-4.1.2): Reject SUBMITTER: Brian Hutchins, Michigan Dept. Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete paragraph. SUBSTANTIATION: Anti-lock brakes have not been shown to be a significant contributor to safety. It has been difficult to f ind good off road cab and chassis. Often these have come from smaller manufacturers and are produced in lower volumes. Requiring components like anti-lock fur ther discourages the development and sale of these vehicles. Many wildfire engines are used seasonally. Generally, fire activity takes place on dry days. Weather related need for anti-lock systems is vastly reduced. As a min imum standard, this should be left as a buyer option. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: See committee action on public comment 1906-21 (Log #97) which modifies the requirement . The committee feels that if persons are properly trained to use anit-lock braking systems, they can be a definate safety enhancement .

(Log #76) 1906- 90 - (3-4.1.2): Reject [ SUBMITTER: Greg Proven, AM General Corporation COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete wording related to requi rement for antilock brakes SUBSTANTIATION: 1. The value ofanti lock brakes in smaller vehicles has been called into question by recent accident data that indicated no appreciable reduction of accident frequency or severity related for passenger cars.

9. Our vehicle chassis, the HUMMER, has been evaluated with very positive results by the Roscommon Equipment Center under the auspicious of the Northeast Forest Fire Supervisors, and by the National lnteragency Fire Center in Boise. The HUMMER is considered on ideal chassis by many wildland professionals but is not currently available with antilock brakes. This clause excludes an I exceptional wildiand fire fighting tool for lack of a feature that is a t i estionable value for the application.

MMITI'EE ACTION: Reject. COMMITrEE STATEMENT: See committee action on public comment 1906-21 (Log#97) which modifies the requirement . The

committee feels that if persons are properly ga ined to use anit-lock braking systems, they can be a definate safety enhancement .

(Log #97) 1906- 91 - (3-4.1.2): Accept in Principle SUBMITTER: Rick Isler, Washington State Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add the words:

"...If available from the manufacturer." SUBSTANTIATION: This agencydoes not use custom built chassis/apparatus and as such is limited to the offerings of the chassis manufacturers. COMMITIT~ACTION: Accept in Principle.

I Add the text: "if such a system is available from the chassis manufacturer." COMMITIT, E STATEMENT: The committee feels that if persons are properly trained to use anit-lock braking systems, they can be a defihite-safety enhancement . However, the-committee does no t want to limit the use of certain chassis simply became they do not have ABS available. Therefore the committee is requiring the purchaser utilize that option if it is available from the chassis manufacturer.

(Log #6) 1906- 2 2 - (3-4.2.2): Reject SUBMITFER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: It seems confusing that an :ude clearance is listed less than the ground clearance for the vehicle. Ground clearances appear adequate, the axle clearance does not. Suggest delet ion of the axle housing clearance column and provide only the minimum for g round clearance. SUBSTANTIATION: As written it appears that ground clearance really doesn ' t mean anythi.ng if you have another port ion of the vehicle closer to the ground, i.e., the axle clearance. COMMITTEE ACTION: Rejec~ COMMrlTEE STATEMENT: The committee feels it needs to define both axle housing and ground clearances to ensure minimum clearances as an apparatus moves over uneven ground. A driver can maneuver an apparatus to avoid damage to the axle homi ng but needs higher g round clearance under the remainder of the vehicle.

Higher g round dearances are not available on normal commercial chassis. This is a min imum standard. If the purchaser needs higher axle or g round clearances, he needs to work with an apparatus manufacturer to find a chassis to meet his needs.

(Log #41) 1906- 25 - (M.3.2): Accept i n P r i n d p l e 8UBMITrF, R: Ted Rex, Bureau of Land Management , NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Amend to read: The transmission shall allow the vehicle to funct ion and operate smoothly at 2.5 mph (4 kmph) FOR PTO DRIVEN PUMPS ~. DESIGNING FOR SLOWER. SPEEDS SHOULD BE A PRIORITY. SUBSTANTIATION: Speed is too fast for normal pump and roll opemtious. Personnel working on the ground cannot work at the indicated speed. It is highly desirable to have the apparatus capable of full performance at a walk. C O M M I T ~ ACTION: Accept in Principle.

Revise the existing text to lower the s p e e d t o 2 m p h (3.2 kmph). C O M M I T r F ~ STATEMENT: Pump and roll is covered in 5-15.and is being modified to a 2 m p h speed. The smooth operation at low speed ~ also needed when-it is necessary.to traverse rough terrain.

1906- 24 - (3-4.fi.3): Accept in Principle (Log #59) S U B ~ D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"...within a fully enclosed area for the total..." SUB,$~ANTIATION: None. COMMITI'EIg ACTION: Accept in Principle.

Revise the text to read "...within a fullv enclosed area(s~ for the total..." C o M M r I ' r E E STATI~IE~IT: The committee is edi~Lorially adding (s) to the word area to allow for the use of non-contiguous areas.

89

N F P A 1906 m F 9 4 R O C

(Log #29) 1906- 25 - (3-4.6.4): Reject SUBMITTER: J o h n M. Farrington, Centerville-Osterville-Marstons Mills, MA Fire Dislrict COMMENT ON PROPOSAL NO: 1906-192 RECOMMENDATION: Do not comment on operational r iding

~ ositions in document . UBSTANTIATION: ff subcommittee cannot accept the many

recommendat ions fi'om Plymouth County Massachusetts agencies on pump and roll operations from turrets or cages - do not comment on this me thod of operation in the standard. COMMITTEE ACTION: Rejec t . COMMITTEE STATEMENT: The committee could no t unders tand what the commentor wants. Based on the reference to proposal 1906-192 and the comment , the committee believes the commentor is concerned with language that was in an earlier draft and removed as a result o f public proposals received.

(Log #7) 1906- 26 - (3-4.6.6): Reject SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: The requirement that head height at any seat shall be at least 37 in. is probably too low. Suggest adding 2 - 3 in. to the minimum. SUBSTANTIATION: Many fire fighters are required by the "Agency Having Jurisdiction" to tide in the apparatus fully prepared for suppression duties. This includes protective equipment (helmet) as specified in NFPA 1977. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: This is a minimum standard. The purchaser can specify more head height if it is needed in specific apparatus.

(Log #98) 1906- 27- (3-4.6.8(k)): Accept in Principle SUBMITTER: Rick Isler, Washington State Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete:

" ( i fa key is provided, it must be attached to the cab interior.)" SUBSTANTIATION: Agency apparatus is frequently used in close proximity to inmate crews. Policy does no t allow for leaving the keys in a vehicle where it could be potentially used for escape. COMMITTEE ACTION: Accept in Principle.

Delete the text from the requirements of the standard but add an appendix to. read'. "If an ignition key is required to start the apparatus, it is r e commended that the key be attached to the cab interior to prevent its accidental removal." COMMITrEE STATEMENT: The committee is concerned that ignition keys no t be removed from the apparatus, thus leaving the apparatus unusable at the time of an emergency. However, it also realizes there are operational problems sometimes with leaving a key in the apparatus and is adding a recommendat ion in the appendix to caution persons on this issue.

(Log #92) 1906- 28 - (4-2): Reject SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Change chart to read as follows:

G.P.M. IN" 20 - 70 1 1/2" 70 - 100 2" or 2 1 / 2 " 100 - 175 2 1/2" 200 - 250 3"

SUBSTANTIATION: Since this is a performance standard and we are talking about suction hose size by flow rate we should only state flow ranges with various sizes of suction hose e.g. 20 - 70 GPM with 1 1 / 2 " hose. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The committee has established the flow rates in table 4-2 (a) as rating points for pumps on wildiand fire apparatus so they need to be specific points rather than ranges. See 4-1.

(Log #91 ) 1906- 29 - (4-3.2): Accept in Principle SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add an additional sentence after the first sentence to read: The pr imer pump shall not be used after the 5 min. test period has begun. SUBSTANTIATION: We must maintain consistency with section 14-4. COMMITI'EE ACTION: Accept in Principle. Add a sentence as suggested but revise the sentence to read: "The

pCump pr imer shall no t be used during the 5 rain. period." OMMITrEE STATEMENT: The committee agrees to add a

sentence but is revising it to establish a requi rement which can then be the basis of a test in 14-4.

(Log #62) 1906- 30 - (4-5.1.1): Accept SUBMITI'ER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: 4-5.1.1 Add "national standard hose threads SUBSTANTIATION: None. COMMITI'EE ACTION: Accept.

(Log #78) 1906- 31 - (4-5.1.1): Accept in Principle SUBMITTER: Jack Makin, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text to include 2 in. NPSH as an acceptable suction intake thread. SUBSTANTIATION: The Mark-3 and BB-4 pumpers manufactured by Wajax-Pacific Fire Equipment, Inc. are equipped with a 2" NPSH male suction port. We estimate over 3000 of these units to be in service bywildland agencies across the country. 2" NPSH hose became a standard thread on this size pump. Adapting to national standard would cause increased potential for suction leaks and resultant equipment failure. COMMITI'EE ACTION" Accept in Principle. Add a second sentence to 4-5.1.1 to read: "Intakes of 2-in (51-mm)

or less in size shall be permit ted to have NPSH thread." Also revise the third sentence of 4-6.2 to read: "Discharge outlets

1 1/2-in. (38-mm) or less in size shall be permit ted to have NPSH thread."

Change the definition of discharge outlet size in 1-3 to read: "The nominal size of the first fire hose thread from the pump available to the pump operator."

Change the definition of intake connect ion size in 1-3 to read: "The nominal size of the first fire hose thread from the pump available to the p u m p operator." COMMIT]FEE STATEMENT: Because NPSH is used extensively in the wildiand fire suppression service, and where NPSH is a recognized thread standard, the committee is agreeable to allowing this thread on the small size intakes and discharges. This change also requires changing the definitions of discharge outlet size and intake connect ion size to be more genetic.

(Log #79) 1906- 32 - (4-5.1.1): Accept in Principle SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-253 RECOMMENDATION: Revise text as follows:

The intakes specified shall have male national s tandard threads. ("NH') American national hose coupling threads ("NPSH") are an acceptable option on two inch ("2") sucuon inlets when specified. SUBSTANTIATION: RE: Proposal 1906-78 (4-6.2) (Log#89) accept in principal same applies to suction threads. Many federal wildiand agencies have standardized on 2" NPSH male suction threads on their smaller portable/skid mounted pumpers. Adapting to 2" NST is undesirable, costly, and cumbersome. An agency or deparmaent should be able to specify 2" NPSH male suction threads when desired. COMMITrEE ACTION: Accept in Principle. COMMITTEE STATEMENT- See committee action on public comment 1906-31 (Log #78)

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N F P A 1906 ~ F 9 4 R O C

(Log #82) 1906- 33 - (4-6.9): Accept in Principle SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

If the ap)p aratus is equip[p ed with a43ooster reel, the ri gn p p g ' d i in between the pump and booster reel shall be min imum of one normal size larger than the hose to be carried on the reel and shall be equipped with a shut offvalve of at least the normal size of the hose t u b e carried on the reel. When total distance between hose reel and pump is 6 feet or less, high pressure booster hose of the same normal size is acceptable provided there are no sharp bends and if a full flow swiveljo|nt is Utilized. SUBSTANT ,,IA,, "I~ON: You are no t addressing the restriction in the swlveljoint I full flow swivel joints have a 7/8" waterway. What good will it do to pump 1-1/4" hose in to a reel carrying 1" booster hose if the water must pass through a 3/4" orifice in the swiveljoint.~ COMMITTEE ACTION: Accept in Principle.

Revise 4-6.9 to read: "If the apparatus is equipped with a booster reel, the piping, valves and swivel between t h e pump and booster reel shall be nominally the same size or larger than the nominal inside diameter of the hose to be carried on the reel. A shut off valve shall be provided between the pump and the reel. High pressure booster hose of the same nominal size shall be permit ted to be used inp lace of piping." COMMITTEESTATEMENT: The committee now feels that the normally shor tdis tances involved on wildland fire apparatus between the pump and the booster reel will not adversely affect the , friction loss if p lumbing of the same nominal size as the hose is used.

(Log #83) 1906- 34- (5-3): Reject S U B M I T r E ~ Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"Where there is a seoarate cab-distinct f rom the slid-on, a green light shall be..." " SUBSTANTIATION: Since this s tandard addresses both engine driven apparatus and slip-ons i ndependen t of same, let's ensure this green light is only required when the pump cannot be seen to be running by the operator/driver . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: See 5-1.1 which states that 5-3 appl ies to auxiliary engine driven pumps. Therefore the suggested wording is not necessary.

l

COMMITrEE ACTION: Reject. COMMrITEE STATEMENT: The committee is cormerned with false shutdowns due to an improperly operating pressure switch. It also believes that if an operator gets a low oil pressure indication (see 5-7.2), the extra t ime may be needed to allow fire fighters to withdraw to a safe location. An operator could nurse an engine along with low oil pressure if required.

(Log #81) 1906- 37- (5-4.2): Accep t in Principle SUBMITTERa Mark A. Conron, Wajax-Padfic Fire ]Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"Is activated o/fly when the water pump is out o f "o r runnin~ out of" water." SUBSTANTIATION: Pressure switches are designed to ground the ignition when discharge pressure d rop below 60 PSI. This occurs when the pump is running out of water, NOT when the pump is out of water. COMMITTEE ACTION: Accept in Principle.

Revise the end of the ser~tence to read: " ...is activated only when the water pump is running out of water." C O ~ STATEMENT: The committee is adding the work ~running to the existing text which allows for what the commentor w a n t s .

1906- 38 - (5-4.2): Reject (Log #99) S U B ~ Rick Isler, Washington State Dept. o:t" Natural Resources COMMENT ON PROPOSAL NO: 1906-233 R E C O ~ A T I O N : Delete in its entirety. S ~ ~ T I O N : If the p tmp does no t shut down for low oil, it probably won t run much Ionl er without a major failure. If that happens it won ' t just be a cou ,le o f minutes without water to add oil it will be no more water at all. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The committee is corLcerned with false shutdowns due to an improperly operating pressure switch. It also believes that if an operator gets a low oil pressure indication (see 5-7.2), the extra time may be needed to allow fire fighters to withdraw to a safe location. An operator could nurse an engine along with low oil pressure if required.

(Log #S2) 1906- 35 - (5-4.2): Reject SUBMITTER: E. Michael Bailey, Wisconsin Dept. of Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: To the wording: An automotive engine shutdown system shall no t be permitted, except for an automatic shutdown that is activated only when the wa te rpump is out of water;, Add the wordlng~ or when engine is out of o i l

SUBSTANTIATION: Most auxilliary engines have an automatic shutdown system to protect the engine when it runs too low on lubrication oil. It seems ludicrous to protect the water pump with auto-shutdown, but to ignore protecting the unit which drives the pump. Low oil shutdown systems should be allowed, too. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The committee is concerned with false shutdowns due to an improperly operating pressure switch. It also believes that if an operator gets a low oil pressure indication (see 5- 7.2), the extra t ime may be needed to allow fire fighters to withdraw to a safe location. An operator could nurse an engine along with low oil pressure if required.

(Log #89) 1906- 39 - (5-5): Reject $UBMITTER: Mark A. Conron, Wajax-Pacific Fire ]Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

(a) "...and an independen t governor ~ that l imits . . . recommended maximum no - load speed" Delete Governed.

(b) "An automatic speed controller is def ined as bein~ that which shall automatically... • v SU]gSTANTIATION: (a) In designing aper formmlce standard what's important is to have a system that hmits the engine speed, at no load, to the engine manufacturer 's r e commended maximum no load speed for the application. All of this is to ensure one does no t break the crankshaft or burn the seals. If a switch or anything else does this~ob it should be allowed.

( b ) Let s be clear that this last sentence is defining what a speed controller isl COMMITTEE ACTION: Reject. COMMITTEE STATEMENT; The committee feels due existing wording adequately covers the intent as a governor ,:an be any device that does the job, including a switch.

1906- 36 - (54.2): Reject (Log#42) SUBMITTER: Ted Rex, Bureau of Land Management , NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Amend to read: "....only when the water

~ ump is out of water OR LOW ENGINE OIL PRESSURE OCCURS." UBSTANTIATION: There is no safety difference in auxiliary

engine shut down because of lack of water or low oil pressure. Failure to have low oil pressure shut down can result in extremely costly repairs and the loss of the apparatus during those repairs.

(Log #8) 1906- 40 - (5-9): Accept in Principle SUBMrFrER= J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

On diesel engines, ...shall be provided with an USI)A Forest Service approved sl~ark arrester. This requi rement should also include gasoline driven engines. SUBSTANTIATION: Federal and several States have laws that require a spark arrester for all internal combustion engines, regardless how they a repowered . The spark arrester is designed to arrest sparks that cause fires in wildland conditions.

91

N F P A 1906 m F 9 4 R O C

COMMITrEE ACTION: Accept in Principle. Delete the words: "On diesel engines" in the third sentence.

COMMITYEE STATEMENT: By deleting the wording, this sentence will apply to all engines with an exhaust system.

COMMITTEE STATEMENT: The committee feels that in a minimum standard, a 1 in. line is sufficient. However, it is willing to suggest larger fill lines in the appendix.

(Log #58) 1906- 41 - (5-13.2): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add "An auxiliary pump shall use the same stypu~Of fuel as die chassis engine."

STANTIATION: None. COMMITI"EE ACTION: Accept in Principle. Add an appendix to 5-13.2 which reads: "It is r e commended that

the pump engine use the same type of fuel as the chassis engine." COMMYVrEE STATEMENT: In a minimum standard, the committee does no t feel it can mandate dais as many smaller pumps are driven by gasoline engines and the cost to drive these pumps with diesel engines is significantly greater. However, many of these pumps are used on diesel driven apparatus.

(Log #57) 1906- 42 - (5-15): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

".. .pump can deliver at least 20 gpm (76 L /min ) at 125 psi while the apparatus is moving at 2 mph or less." SUBSTANTIATION: None. COMMITFEE ACTION: Accept in Principle.

Revise the sentence to read as follows: "The vehicledrive engine and drive train shall be arranged such that the pump can'deliver at least 20 gpm (76 L/ra in) at 100 psi (690 kPa) while the apparatus is moving at 2 mph (3.2 kmph) or less." COMMITrEE STATEMENT: In reducing the speed from 4 m p h to 2 mph, the committee had to look at the ability to generate high pump speeds necessary for elevated discharge pressures. As a minimum, the committee feels that for pump and roll operations, 100 psi is sufficient, as water is normally discharged through a short hose line with reduced fi'iction loss.

(Log #84) 1906- 43 - (6-3.1): Accept SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"A convenient covered fill opening" (Delete Dimensions) "designed to prevent sp'fllage." SUBSTANTIATION: Since we are to be building a performance standard we should no t impose design/size requirements. What 's important is that there be an opening to allow filling of the tank in a timely manner . COMMITI?EE ACTION: Accept.

(Log #56) 1906- 44 - (6-3.4): Accept in Principle SUBMITTER: D.W. McKenzie, ForestService-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

"A valved tank fill line of the same size as the pump outlet shall be

~ rovided." UBSTANTIATION: Need bigger line than 1 inch.

COMMITI"EE ACTION: Accept in Principle. Leave the requirement as stated in the standard. Add an appendix

to 6-3.4 to read: "Larger size tank fill lines may be desirable when using larger size pumps. They will allow the tank to be refilled faster. The following is suggested as a guide.

Pump Size Tank Fill Line Size

20-50 gpm (76-190 L /min ) 70 to 175 gpm (265-662 L /min ) 200 gpm (757 L/ra in) or larger

1 in. (25 mm) 1 1/2 in. (38mm) 2 in. (51 mm)

(Log #9) 1906- 45 - (%6.2): Accept in Principle SUBMITYER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add a sentence to provide the latitude for the "Agency Having Jurisdiction" to approve the use of a reflective stripe. SUBSTANTIATION: Many units in the western United States do not have the need for such a requirement. In many applications it does nothing to improve the safety of the equipment or fire fighter. COMMITTEE ACTION: Accept in Principle.

Revise the first sentence of %6.2 to read: "Each apparatus that responds on public roads as an emergency vehicle shall have retlective stripe(s) affixed to the per imeter of the apparatus." COMMITrEE STATEMENT: The committee feels that any a~pparatus that responds. . on p.ublic roads as an. emergency vehicle. should have the bastc hghts, stren, and striping to designate it as an emergency vehicle and to provide for the safety of the fire fighters whether the vehicle is moving or parked along side a public way. The committee 's change allows the "agency having jurisdiction" to do what it desires if the apparatus is not to respond on public roads.

(Log #CC3) 1906- 46 - (%6.2): Accept SUBMITTER: Technical Committee on Fire Depar tment Apparatus COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add to the end of the first sentence the following wording: "Type Ill, Class 1 or 3. SUBSTANTIATION: T h e reference to ASTM D4956 is incomplete without specifying a type and class. COMMITTEE ACTION: Accept.

(Log #80) 1906- 47 - (%8.1): Accept in Principle SUBMrI['IXR: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

The weight of a completed skid - moun ted fire fighting package, including fuel, oil, and standard equipment normally carried, less water should be equipped with lifting eyes or forklift slots to facilitate its possible movement by exper ienced/ t ra ined personnel. SUBSTANTIATION: 1. It should be made very clear that the unit should be empty of water before lifting.

2. ff the owner does not in tend to lift slip-on in and out why must they have to have lifting eyes? When lifting eyes are used and the equipment is to be lifted let's ensure liability is limited by asking for personnel exper ienced in such actions. COMMITTEE ACTION: Accept in Principle.

Delete 7-8.1and change the term "skid-mounted" in %8.3.3 to "slip- on" COMMITrEE STATEMENT: The committee now realizes that many slip-on units are no t regularly moved onto and off a chassis and therefore it is no t necessary to have lifting eyes or fork-lift slots in a minimum standard. The committee is also changing the term "skid-mounted" to slip-on" in 7-8.3.3 for consistency in terminology with the tide of the section.

(Log #10) 1906- 48 - (7-8.3.3): Accept SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise the second sentence to read:

"...prevent movement of the unit during rapid acceleration, deceleration or during side-hill operation." SUBSTANTIATION: Work on side-hill particularly in off-road use may be more cdtical to the units shift than during starting or stop ~ng. COI~II 'VI 'EE ACTION: Accept.

92

NFPA 1906 - - F94 ROC

( Log #1 I) 1906-49- (8-2): Accept in Principle SUBMITTER: J im Stumpf, Incident Management Consultants COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Are the weights for the minor equipment included as part of the weights outl ined in 3-1.17 SUBSTANTIATION: May make a difference in the overall GVWR of the vehicle. COMMITTEE ACTION: Accept in Principle. COMMITTEE STATEMENT: The weight of equipment is in the equipment allowance weights in table 3-1.1 and the committee has changed the text in 3-1.1 to reflect "miscellaneous and minor equipment." See committee action on public propoka11906-9 (Log #37).

(Log #85) 1906- 50 - (Chapter 9 (New)): Accept in Principle SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 ', RECOMMENDATION: Much of what is written is very design specific. We should revisit based upon our mandate to develop a

~ efformance standard. UBSTANTIATION: We are to build a performance standard.

Let's ensure we endeavor to do this. COMMITrEE ACTION: Accept in Principle. COMMITrEE STATEMENT: While this comment does not suggest any specific changes, the committee is at tempting to move in this direction.

(Log #67) 1906- 51 - (9-2 Expansion Ratio (New)): Accept in Principle SUBMITTER: Ron Rochna, Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add a new definition of Expansion Ratio as follows: The rati'o of the volume of the foam to the original volume of the foam solution. SUBSTANTIATION: The definitions are no t complete. Expansion Ratio needs to be defined since its ment ioned in the standard. All foam generators have some sort of expansion ratio. COMMITrEE ACTION: Accept in Principle. Take the definition of "expansion" currently in A-9.2 and rename it

"expansion ratio" and move it to 10-2. Delete the definition of "expansion" in A-10-2. COMMITTEE STATEMENT: The committee feels the definition currently in A-9-2 for expansion meets the needs and is moving it to Chapter 10 where the term is used.

(Log #15) 1906- 52 - (9-2 Proport ioner): Reject SUBMITTER: Gary Handwerk, Hale Produizts COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete text as follows:

Definition of proport ioner. SUBSTANTIATION: Proport ioner doesn ' t n~eed to be a venturi device and isn't this also the same as foam concentrate proport ioning system. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: See committee acdon on public comment 1906-53 (Log #55).

(Log #55) 1906- 53 - (9-2 Proport ioner): Accept in Principle in Part SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise the definition to read:

Proportioner. A device or me thod to add foam concentrate to the water stream to make foam solution. There are two types of proport ing systems (1) manually regulated proport ioning systems and (2) automatic regulating proport ioning systems. SUBSTANTIATION: Some proport ioners do have and use a venturi device but not all. COMMITrEEACTION: Accept in Principle in Part.

Revise the definition as shown in the first sentence of the commentor ' s suggestion except delete the word "stream". Do not include the second sentence. COMMITTEE STATEMENT: The second sentence is no t part of the definition, but rather explanatory material on systems that use proportioners.. . The deletion of the word "stream" is to generalize the defimuon.

(Log#54) 1906-54- (9-3): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Need to add

Manually regulated proport ioning systems (1) Batch mixing (2) Suction-side (3) In-line eductor (4) Bppass eductor (5) Around-the-Pump (6) Direct injection Automatic regulating proport ioning systems (1) Balanced pressure, venturi propor t ioning system (2) Balanced pressure, pump system (3) Balanced pressure, bladder tank (4) Water-Motor proport ioning system (5) Direct injection, automatic regulating proport ioning system

SUBSTANTIATION: See enclosed "Proportioners for Use in WUdland Fire Application"

NOTE: Supporting material is available for review at NFPA Headquarters. COMMI'VrEE ACTION: Accept in Principle.

Revise the title of 9-3.1 to Eductor System. Revise A-9-3.1 to read as follows: A-9-$.1 In-line eductor foam propor t ioning systems are installed in

the water p u m p discharge as a permanently installed device or as a portable device. Water is forced through the eductor venturi by water pump discharge pressure, creating a vacuum causing foam concentrate to be drawn into the eductor (into the *rater stream) at the design rate of the device. See Figure A-9-5.1 (a). By design, a nonrecoverable pressure drop of 30 percent orgrea~er is required for eductor operation. The maximum recoveredpressure including friction loss and static head pressure is nominally 65 percent of the inlet pressure to the eductor. Eductors are available with fixed or variable rate foam solution mix ratios.

Pressure vacuum vent ~ ~- Fill tower

Concentrate tank--% I~'~i

Tank shuteff 4

Flush-out valve Water/foam \ discharge ~I

- h i ~ Metering valve 1

~ E:ulcto r I I

i

L~l~-dWate r intake

J Water tank I

il , , ~ Drain

[)rain tTan k shutoff

1 I '

I

I u

I

i i

1

Foam concentrate Water

F'~ure A-9-3.1 (a) In-line eductor foam proport ioning system.

(a) A variable flow by-pass eductor system is a modification of the in-line eductor foam propor t ioning system. An eductor is placed in a by-pass line a round the main-line water flow control valve so that when the valve is adjusted to produce water flow through the by-pass eductor, foam concentrate is drawn into the educter (into the water stream). See Figure A-9-3.1 (b). The foam solution in the by-pass line is then jo ined with the main-line water flow drama stream of the

93

N F P A 1906 n F 9 4 R O C

water flow control valve. Propor t ioning is controlled by the use of a meter ing valve in the foam concentra te line together with adjust- ments of the water flow control valve.

Pressure vacuum vent --~ ~--Fill tower

Concentrate tank I ~ "~ I Water tank

Tank shutoff ~ ~ Drain

Water/foam ~- Flush-out valve discharge ~

- - I ~ - . . . . . .

~ " w Metedng valve

water control valve /

| i

: W ~ j ~ . ~te r intake Water pu W "

Drain

,1 I !

t

I

I Tank shutoff

I i

I i I

I | |

I J

i i

i Foam concentrate

Water

Figure A-9-3.1(b) Variable flow by-pass eductor system.

(b) Variable pressure eductors are a modification of the in-line eductor foam propor t ioning system. This type of eductor is des igned to automatically adjust the area of the eductor venturi to compensa te for changes in water pressure at the inlet of the device.

Add a new 9-3.2 to read as follows. 9-3.2 Intake-side System. An intake-side foam propor t ion ing

system shall mee t the requ i rements of Sections 9-4, 9-5, 9-6, 9-7 and 9-10 as applicable.

Add an append ix to the new 9-3.2 to read as follows. A-9-3.2 An intake-side foam propor t ion ing system is a manual ly

regulated system. An in-line device, installed in the water p u m p intake or suction, provides a connec t ion t h rough a foam concentrate meter ing valve to the foam concentra te tank. Vacuum created by the water p u m p draws foam concentra te directly into the p u m p intake. Hydrant or relay operat ion is no t possible with this type of foam propor t ioning system.

R e n u m b e r 9-3.2 t h rough 9-3.5 as 9-3.3 t h rough 9-3.6. R e n u m b e r A-9-3.2 as A-9-3.3 and revise the text to read as follows. A-9-3.3 Around- the -pump propor t ioning systems operate with an

eductor installed betw-een-th-e water puml5 discharge-and intake. A small flow of water f rom the water p u m p ~tischarge passes t h rough the eductor, which creates a vacuuha cahsing foain c-oncentrate tb be drawn into the eductor and discharged into the p u m p intake. Around the p u m p foam propor t ion ing systems will nb t operate properly at a water p u m p infake pressure greater than 10 psi (69 kPa). These systerris pro-duce foffrn solution at all water p u m p discharge outlets whdn the system is operat ing. - -

A manua l a round- the -pump proportaoning system utilizes a manual ly adjustable foam concentra te me te r ing valve to control the mix ratio. [SeeFigureA-9-3.3(a).]

R e n u m b e r Figure A-9-3.2(a) as A-9-3.3(a). A flow meter sens ing a round- the -pump propor t ioning system

utilizes a flow mete r sens ing system to moni to r total solution flow mad foam concentrate flow7 The flow data is t ransmit ted to a microprocessor that controls the mix ratio t h rough a foam concentrate mete r ing valve. [ See Figure A-9-3.3(b).]

R e n u m b e r figure A-9-3.2(b) as A-9-3.3(b). A conductivity sens ing a round- the -pump propor t ion ing system

utilizes electrical conductivity meters to sense the foam s-olution percentage a n d provide feedback f rom the control sample module . Data f rom the electrical conductivity meters is t ransmit ted to a

microprocessor that controls the mix ratio th rough a foam concentrate mete r ing valve. [ See Figure A-9-3.3(c).]

R e n u m b e r Figure A-9-3.2(c) as A-9-3.3(c). R e n u m b e r A-9-3.3 as A-9-3.4 and revise the text to read as follows. A-9-3.4 Balanced pressure foam propor t ion ing systems are installed

on the discharge side of the water pump . Two orifices discharge water and foarri concentra te into a - common ratio controller - (proport ioner) located in the water p u m p discharge. By adjust ing the area of the orifices to a part icular ratfo, the p e r c e n t of rejection can be control led if intake pressures are equal. The m e t h o d of control l ing or balancing the foam concentra te pressure with the water pressure varies with different balanced pressure system desigris. The two basic types o f balanced pressure systems are systems without a foam concentra te p u m p and systems with a concentrate pump .

Balanced pressure systems without a foam concentra te p u m p are referred to as "pressure propor t ioning systems." These systems utilize a pressure vessel with an internal bladder to contain the foam concentrate . When in operation, water p u m p pressure is allowed to enter the pressure ves se l and exert pressure on the internal bladder. The foam concentra te is forced ou t of the bladder to the propor t ioner at a pressure equal to the water p u m p pressure. These systems are available with fixed or variable rate proport ioning.

The re are two basic types of balanced pressure f oam propor t ioning systems which utilize a foam concentra te pump. These systems can discharge water and foam solution s imultaneously f rom the water p u m p discharge outlets. The foam solution mix ratio is variable at each water p u m p discharge outlet connec ted to the foam propor- t ioning system. This system is capable of propor t ioning different types of f oam concentra te wben more than one foam concentrate storage tank is l inked to the foam concentrate p u m p via a selector valve system. Foam propor t ioning system operat ion is no t affected by water p u m p intake pressure or in te r rupted when refilling the foam concentra te tank.

(a) A "by-pass system utilizes a d i aph ragm valve in the foam concentra te pump-to- tank line that automatically balances the foam concentra te and water pressure by by-passing excess foam concentrate back to the tank.

R e n u m b e r figure A-9-3.3(a) as A-9-3.4(a). (b) A d e m a n d system is des igned to automatically control the

speed (RPM) of the foam concentra te p u m p to balance foam concentra te and water pressure within the system.

R e n u m b e r figures A-9-3.3(b), and A-9-3.3(c) as A-9-3.4(b), an d A-9- 3.4(c) respectively.

R e n u m b e r A-9-3.4 as A-9-3.5 and revise the text to read as follows. A-9-3.5 Direct injection foam propor t ioning systems utilize a foam

concentra te p u m p to inject foam concentra te direcdy into the water p u m p discharge. Water and foam solution can be discharged s imultaneously f rom the water p u m p when individual injection points are provided for more t hen one water p u m p discharge. This system is capable of propor t ioning different types of foam concentrate when more than one foam concentra te storage tank is linked to the foam concentrate p u m p via a selector valve system. The foam solution mix ratio can be fixed or variable d e p e n d i n g u p o n the system design. Foam propor t ioning system operat ion is no t affected by water p u m p intake pressure or in te r rup ted when refilling the foam concentrate tank.

Flow sens ing direct i r~c t i on foam propor t ioning systems utilize an in-line flow meter(s) to moni to r the system operat ing conditions. System opera t ing data is t ransmit ted to a microprocessor, which controls the mix ratio. Two different flow sens ing systems are available.

(a) A microprocessor receives electronic signals cor responding to the mix ratio f rom the conwol panel and water flow data f rom the flow meter. The microprocessor t hen c o m m a n d s the foam c o n c e n t r a t e p u m p modu le to deliver foam concent ra te at the propor t iona[ rate_ [See Ii~gure A-9-3.5(a).]

R e n u m b e r figure A-9-3.4(a) as A-9-3.5 (a). (b) A microprocessor receives electronic signals cor responding to

the foam concentrate flow f rom a foam concentrate flow-meter, t h e mix ratio f rom the control panel, and water flow data f rom the water flow meter. The micropro&ssor controls the mix ratio t h rough a foam concentrate mete r ing valve. [SeeFigureA-9-3.5(b).]

R e n u m b e r figure A-9-3.4(b) as A-9-3.f(b). A conductivity sens ing direct injection foam propor t ion ing system

utilizes an electrical conductivity meter(s) to sense the mix ratio at the water p u m p discharge(s) and transmits this informat ion to a microprocessor that controls the mix ratio th rough an electro- mechanical foam concentra te mete r ing valve. A s e c o n d electrical conductivity mete r provides feedback f rom the control sample module to the microprocessor. Foam p u m p pressure is main ta ined at a pressure h igher than water p u m p pressure to ensure injection of the concentrate.

R e n u m b e r figure A-9-3.4(c) as A-9-3.5(c). R e n u m b e r A-9-3.5 as A-9-3.6 and Figure A-9-3.5 as A-9-3.6.

COMMITI'EE STATEMENT: The commit tee has added text to cover suction-side systems and by-pass eductor systems. Batch

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N F P A 1906 - - F 9 4 R O C

mixing is not a system and as such is not covered in this standard. The oth. er systems are already covered in the standard.

(Log #30) 1906- 55 - (9-3.5): Reject SUBMITTER: Robert Barraclough, Span Instruments COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete this paragraph and the appendix item. SUBSTANTIATION: To my knowledge, this method of proport ion- hag is not in current use on mobile fire apparatus nor is this type of propor t ioner available in the U.S. or Canada. Since it is n o t i f i common usage and not available, we should delete any reference to it so a fire depar tment doesn ' t spend a lot of time looking for a source of the unavailable equipment . COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: These systems are available and should be covered in the standard.

(Log #53) 1906- 56 - (9-4.1): Accept in Principle SUBMITTER= D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

%.ranging from 0.1 percen t to I percent.. ." SUBSTANTIATION: Need to go low on foam injection. COMMITTEE ACTION: Accept in Principle.

Revise 94.1 to read: ~I'he propor t ioning system shall be capable of fPrrOportioning Class A foam concenwate(s) at a mix rate(s) selected

om the range of 0.1 percent to 1 percent over the design range of flow and operating pressures." COMMITTEE STATEMENT: The committee is concerned that not all proport ioners have the ability to be adjusted but as rewritten, the paragraph covers both fixed point and adjustable rate proportioners.

(Log #59) 1906- 57- (94.3(c)): Accept SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

(c) Pressure drop across each individual proport ioning device at the device manufacturer 's 25%, 50%, 75%, and 100% maximum designed flow rate. SUBSTANTIATION: Need to know pressure loss at reduced flows. COMMITTEE ACTION: Accept.

(Log #51) 1906- 58 - (94.4): Accept in Principle SUBMITTER: D.W. McKenzie, ForestService-USDA COMMENT ON PROPOSAL NO: 1906-933 RECOMMENDATION: Revise as follows:

"...not exceed S f t / s e c at the maximum design flow rate." SUBSTANTIATION: Change 25 f t / sec to 3 ft/sec_

25 f t / sec is much to fast. COMMITrEE ACTION: Accept in Principle.

Delete 9-4.4. COMMITrEE STATEMENT: On review, the committee feels the paragraph is too design restrictive and the system's performance will show whether the velocity is correct or not.

(Log #16) 1906- 59 - (9-4.5): Accept in Principle SLIBMI'[q'ER: Gary Hhndwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-933 RECOMMENDATION: Change to 10 ft /sec. SUBSTANTIATION: 6 f t / s ec i s not needed and is too reslxictive. It is no t needed for Class A foam, and is only needed for some brands of thick 3% and 6% Class B foam. COM]VIITrEE ACTION: Accept in Principle.

Delete 94.5. COMMITTEE STATEMENT: On review, the committee feels the pafagrapil is too design restrictive and the system's performance will shbw wilether the velocity is correct or not.

(Log #50) 1906. 60 - (9-4.5): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATION: Revise as follows:

%. no t exceed 1 1 /9 f t / sec at maximum design flow rate." SUBSTANTIATION: 6 f t / sec is too fast. CoMMrFrEE ACTION: Accept in Principle. Delete 9-4.5.

COMMITrEE STATEMENT: On review, the committee feels the paragraph is too design restrictive and the system's performance will show .whether the velocity is correct or not.

(Log #17) 1906. 61 - (9-4.8): Accept in Principle SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1900-933 RECOMMENDATION: Add the words "or foam pump" after the words "return device" in the second sentence. SUBSTANTIATION: More correct depending on ~/pe of system pCurchased.

OMMITrEE ACTION: Accept in Principle. Delete the last sentence.

COMMITYEE STATEMENT: The original intent ~as to be able to see foam moving but the committee now realizes these lines may not always be visible. As this is a minimum requirement , a purchaser can specify a clear material flits desired.

(Log ~49) 1906. 62 - (94.8): Accept in Principle SUBMITTER= D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

"...between the return device and..." SUBSTANTIATION: Take out "non-". Should no t be in. GOMMITrEE ACTION: Accept in Principle. COMMITTEE STATEMENT: See committee action on public comment 1906-61 (Log #17) which deletes this senl:ence.

(Log #18) 1906- 63 - (9-4.9): Accept SUBMIT'rER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATION: Change "back-flow" to "non-return" in second sentence. SUBSTANTIATION: Keep wording consistent. CO MITI'EE ACTION: Accept.

(Log #19) 1906- 64 - (9-6.3): Accept SUBMITTEI~ Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete word "master" from first sentence. SUBSTANTIATION: Not needed, all gauges should apply. COMMITrEE ACTION: Accept.

(Log #20) 1900- 65 - (9-6.4): Accept in Principle SUBMITTER= Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete word "aunospheric". SUBSTANTIATION: All tanks need (shall have) level indicators. This is an all or nothing question. Either the opera~tor needs to know or notl COMMITTEE ACTION: Accept in Principle.

Delete 9-6.4. COMMrI[TEE STATEMENT: Not all tanks are capable of having a concentrate level indicator. As this is a min imum s3~andard, the committee has decided to leave the requirement for a level indicator hs an option on any foam tank.

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(Log #CC1) 1906- 66 - (9-7.3): Accept SUBMITTER: Technical Commit tee on Fire Depa r t men t Apparatus COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise 9-7.3 to read as follows: "An expansion c o m p a r t m e n t shall be provided on the foam concentrate tank that is of sufficient vo lume to allow expansion and contract ion of the foam concentrate caused by changes in amb i en t temperature . The surface area of the expansion c o m p a r t m e n t shall no t exceed 1 percen t of the surface area of the foam concent ra te tank." SUBSTANTIATION: T he commit tee has been revising some of the a tmospher ic foam tank requ i rements and this change will br iqg NFPA 1906 in line with wording adop ted for NFPA 1922. COMMITTEE ACTION: Accept.

(Log #GG2) 1906- 67- (9-7.11): Accept SUBMITTEITa Technical Commi t tee on Fire Depa r t men t Appara tus COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise 9-7.11 to read as follows: "The foam concentra te tank outlet connect ion shall be des igned or located to prevent aerat ion of the foam concent ra te a n d shall allow withdrawal of 95 pe rcen t of the foam concentra te tank storage capacity u n d e r all opera t ing conditions." SUBSTANTIATION: T he commit tee has been revising some of the a tmospher ic foam tank requ i rements and this change will br ing NFPA 1906 in line with wording adop ted for NFPA 1922. COMMITTEE ACTION: Accept.

(Log #77) 1906- fi8 - (9-9): Accept in Principle SUBMITTER: J o h n Grindley, Robwen COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: 9.9 Pressure vessel foam concentra te or foam solution tanks. The Flow-Mix bladder tanks do no t ho ld foam concentra te or f oam solution. In our system, foam concent ra te is conta ined in a bladder tha t is located inside the bladder tank. The bladder tank itself is filled with water tha t applies pressure to the foam bladder. Therefore , the Flow-Mix bladder tanks should no t be considered u n d e r this section. These bladder tanks are no t closed pressure vessels, bu t are open to the manifo ld system ~xt all t imes when in operation. The pressure in the tank varies proport ional ly to the p u m p pressure. If this section applies to bladder tanks, it shou ld also apply to the entire manifold system in every fire apparatus.

9.9.1 Flow-Mix bladder tanks mee t the requ i rements of ASME boiler and pressure vessel code Section VIII Div. I.

9.9.2 O.K. 9.9.3 N / A 9.9.3.1 N / A 9.9.3.2 N / A 9.9.4 Selector Valve incorporates a 1/2" vent 9.9.5 Good Idea 9.9.6 O.K.

SUBSTANTIATION: None. COMMITTEE ACTION: Accept in Princi~,le.

Revise the first sen tence of 9-9.1 to read: If the tank is charged with a compressed gas, the tank shall be of welded construct ion and designed, fabricated, and s t amped in accordance with the require- men t s of the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, for the requi red pressure."

Make the second sentence of 9-9.1 a new paragraph 9-9.2 and r enumbor 9-9.2 t h rough 9-9.6 as 9-9.3 t h rough 9-9.7. T h e new 9-9.2 reads: "All pressure tanks and associated piping shall be des igned to a m i n i m u m of 1 1 / 2 t imes m a x i m u m workingj~ressure and shall be tested to the design pressure after installation.

Revise 9-9.5 ( r e n u m b e r e d as 9-9.6) to read: "if the tank is charged with a compressed gas, an approved ASME relief valve, properly set, shall be fu rn i shed on the tank to prevent tank pressure froin exceeding 110 percen t of the m a x i m u m allowable working pressure." COMMITTEE STATEMENT: The ASME Boiler and Pressure Vessel Code does no t apply to liquid filled or liquid cush ioned with air filled tanks. However, these liquid filled tanks are still be ing covered by what was the second sen tence of 9-9.1. This sentence is being moved to its own paragraph to ensure it is no t confused with the ASME requi rement . T he word "max imum" was also added before the te rm working pressure" for clarification. The commit tee has modif ied 9-9.1 and 9-9.5 to require the tank mee t the ASME s tandard when it is charged with air and that a relief valve be provided when the tank is charged with air.

(Log #86) 1906- 69 - (9-9.3): Reject SUBMITTER: Mark A. Gonron, Wajax-Padfic Fire Equipment , Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows: "The fill open ing shall ~ inside diameter so as to be able to ouicklv refill. " gUBSTANTIATION: Let 's stay away f rom design spec. a n d concentra te on developing a j ) e r fo rmance standard. COMMITrEE ACTION: Reiecu COMMITTEE STATEMENT: The suggested wording does not state a measurable requi rement .

(Log #66) 1906- 70 - (Chapter 10): Accept in Principle SUBMITTER: Rona ldJ . George, ISFSI COMMENT ON PROPOSAL NO: 1906-23~ RECOMMENDATION: The complete chapter 10 should be revised to include data on a specially des igned hose assembly an d marked to be used only to t ranspor t compressed a i r / f o a m concentrates. SUBSTANTIATION: At present s tandard fire hose an d couplings are des igned for water use, no t air per NFPA 1961 an d 1962. Air reacts more violently in hose t han water. Industry already has special air hoses des igned for safe use.

Actual field use has shown that the hose is destroyed after very little use when used with a compressed air foam system where mix ing is accompl ished in the hose. Field tests have also shown rapid wear of the outer jacket of s tandard fire hose due to turbulence in the hose caused by air mix ing with water and foam concentrate . COMMITTEE ACTION: Accept in Principle. Add an append ix i tem in the s tandard for 8-2(0 which states "If

the hose is i n t ended to be used with a compressed air foam system (CAFS), the user should check with the manufac tu re r of the hose to ensure the hose has been approved for use with CAFS." COMMITrEE STATEMENT: This is a hose and hose use issue which is beyond the scope of this s tandard. The commit tee is add ing appendices to the three places where fire hose is m e n t i o n e d to warn persons to check with the hose manufac tu re r if the hose is to be used with CAFS. (See also the commit tee action on public c o m m e n t 1906-85 (Log #88). In addition, this commit tee will make the NFPA Fire Service Occupat ional Safety and Health Commit tee an d the NFPA Fire Hose Commit tee aware o f the concerns an d suggests the c o m m e n t o r work with these commit tees as well.

(Log #100) 1906- 71 - (Chapter 10): Reject SUBMITTER: Susan M. Young, Fire Equ ipmen t Manufacturers ' Aasn., Inc. COMMENT ON PROPOSAL NO: RECOMMENDATION: Rewrite Chapter 10, Compressed Air Foam Systems, to incorporat ion safety requ i rements and guidance on the use of hose on CAFS Systems that is suitable for such applications. SUBSTANTIATION: Chapter 10 fails to address pe r fo rmance an d safety considerat ions for an integral par t o f a CAFS System - - the means to apply the foam, which is generally accompl ished by means of a hose. However, Chapter 10 does no t contain any reference to or guidance on the use of hose that is suitable to carry an a i r / foam mixture u n d e r pressure. Such guidance is of critical safety impor- tance.

Standard commercial fire hose carried on apparatus is no t des igned to t ranspor t air a n d may react violently und e r such use conditions. T h o u g h un in tended , its use on a compressed air foam system is possible and can be dangerous , such misuse may cause a hose or coupl ing failure p roduc ing property damage, bodily injury, or death. Research done on this issue indicates there are significant hazards for the Commit tee to consider.

FEMA urges t he Commi t tee to study this issue and provide the necessary guidance on tile use of hose that is suitable an d safe for use on a CAFS System. A t a m i n i m u m , the s tandard shou ld state that: No hose shall be used on a CAFS System unless such use is r e c o m m e n d e d by the manufac tu re r of the system an d the hose manufac turer , and the hose is so marked for such use in a conspicu- ous manner . FEMA also urges the following be inc luded in Chapter 10:

WARNING Standard commercia l fire hose carried on apparatus is no t

des igned to t ranspor t air and may react violendy und e r such use conditions. Its use on a compressed a i r / f oam system can be dangerous a n d may cause a hose or coupl ing failure, p roduc ing property damage, bodily injury, or death . Always follow the manufac ture rs ' r e commenda t ions a n d instructions on proper use and main tenance .

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COMMITI'EE ACTION: Reject. COMMITTEE STATEMENT: This is a hose and hose use issue which is beyond the scope of this standard. However, see committee action on public comment 1906-70 (Log #66) and public comment 1906-85 (Log #88) which adds appendix material to the three places where hose is ment ioned in connect ion with or possible use with CAFS.

(Log #75) 1906- 72 - (Chapter 10): Reject SUBMITrER: Joseph R. Poor, National Fire Hose Corp. COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATION: Chapter 10 should be revised to spedfy:.

1 ) Design and performance criteria of the discharge hose line assembly

2) Pressure relief on the discharge side of the system SUBSTANTIATION: 1. At present CAbS users will connect whatever is convenient as a discharge hose line assembly. This is usually fire hose. Fire hose has been rendered unfit for use after as short as 4 weeks CAF~ service.

The nature of the prematurely sbor ten service life includes: a. Corrosion of the coupling b. Corrosion of the expansion ring. c. Failure of the hose liner at the coupling interface d. Excessive wear of the exterior of the hose (presumably from

vibration of the hose assembly cause by turbulence created in the hose during mixing).

Fire hose is des igned for water service no t air. Since air is compressible (water is not), the reactive forces of air are more extreme than water in hose. This should be taken into consideration when specifying design and performance criteria for discharge hose line assemblies used with CAFS.

2. The standard as written, contains no provision for pressure relief on the discharge of the CAFS. Since air can react more violently than water in a hose line, pressure relief should be provided to protect the fire fighter. COMMITFEE ACTION: Reject. COMMITTEE STATEMENT: This is a hose and hose use issue which is beyond the scope of this standard. However, see committee action on public comment 1906-70 (Log #66) and public comment 1906-85 (Log #88) which adds appendix material to the three places where hose is ment ioned in connect ion with or possible use with CAFS.

(Log#102) 1906- 73 - (10-3.3): Accept in Principle SUBMITTER: Brian Cable, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATION: Revise the paragraph to not require a two to one ratio between the pump capability and the compressor ~CaL~asbi lity.

TANTIATION: The paragraph puts an unnecessary requirement on the owner of a CAFS - that his system have a pump that is sized twice the rating of the air compressor. Pump only units already set a minimum size. Field testing as well as NFPA testing has shown that extinguishing capabilities of the CAFS increases with increases in air ratio. The requi rement for higher water flow capabilities was based on the assumption that the operator needed higher flow rates in the event the CAFS failed. NFPA specifications do not desigia fail- safe criteria into other equipment spedfications. The water flow rates for the pumps that exist in the present specification should stand as a minimum performance requirement. COMMITTEE ACTION: Accept in Principle.

Revise 10-3.3 to read as follows: "The water pump supplying the CAFS shall have a rating in gallons per minute at 100 psig (689 kPag) of at least the rating of the air source in SCFM (e.g. 125 gpm pump and a 125 SCFM compressor)."

Revise A-10-3.3 to read as follows: "It is r ecommended that the apparatus have the incapability of supplying 2 gpm (7.6 lpm) bf water per 1 SCFM (0.028 m ) of air product ion to provide fire-fighting capability using both water and compressed air foam simultaneously. COMMITrEE STATEMENT: The committee agrees that in a minimum standard, the 2 to 1 ratio is probably no t necessary but the committee wants to keep the concept as a recommendat ion so it is changing the appendix to reflect that recommendat ion.

(Log #101) 1906- 74 - (10-3.4): Accept SUBMrlWER: Brian Cable, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATION: Delete the paragraph. SUBSTANTIATION: The paragraph is design restrictive and does not establish a minimum requirement . Testing has :~hown that a wide range of air expansion ratio is no t a minimum :acceptable performance for wildland fire fighting application. A few specific ratios would be adequate, i.e. 8:1 and 20:1. COMMITTEE ACTION: Accept.

(Log #48) 1906- 75 - (10-3,6 (New)): Accept in Pr indple SUBMITFER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add new section to read:

10-3.6 CAFS of 50 efm and over water pressure shall automatically control air pressure and be equal to air pressure. SUBSTANTIATION: This results in a better operating unit. COMMITrEEACTION: Accep t in Pr indple . Add a new 10-3.6 to read: " On balanced pressure CAFS of 50 efm

and over, the water pump discharge pressure shall automatically regulate the air pressure to balance the air and water pressures. COMMITrEE STATEMENT: The committee is accepting the concept and editorially revising the text for clarification.

(Log #68) 1906- 76 - (10-6, A-10-6.5 (New)): Reject SUBMITFER: Ron Rochna, Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add new sections to read: 10-6.5 "All discharge plumbing will have separate air and water

regulating valves ahead of the main discharge shut-off valve that are to flow CAFS foam. A-10-6.5 It is desirable to have the ability to set air and solution

flow rates separately at each discharge outlet. This ]permits the operator to preset or change the foam type without affecting the flow rates or performance of other discharge streams. This permits the operator of a moni tor to readily change the type of foam at will. It also permits the apparatus to use any and all fire stream appliances as well as foam generators. SUIKSTANTIATION: The desired design o f a CAF2,g engine is to have it be able to pump the desired foam in the same time it takes to pump water. It should be no t more complicated to operate than a standard engine, that is, if properly designed, operating the CAFS should be very similar, if no t identical to operating a water only engine. It must have the ability to pump just foam t;olution to run low energy foam generators as well as C A ~ foam simultaneously.

In order tO do this it requires that air and solution control valves be at each outlet that in t end to permit CAFS foam discharge-- this includes the monitor. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: This is beyond a requirement for a minimum standard. The purchaser can specify additional regulating valves if they want them.

(Log #'21) 1006- 77 - (10-6.3): Accept in Principle S U B ~ Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete "The valve shall be of the quarter- turn to open or close type". SUBSTANTIATION: Design restrictive, why, also 1 /4 turn valve actuator is not as safe as a worm drive control. COMMITTEE ACTION: Accept in Principle.

Delete the entire paragraph 10-6,3. COMMITITA~ STATEMENT: In reviewing this paragraph, the committee now feels the whole Earagraph is desigr~ restrictive. If the valving is not proper, the unit will not meet the performance test requirements.

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N F P A 1906 m F 9 4 R O C

(Log #90) 1906- 78 - (10-6.3): Reject SUBMITTER: Mark A. Conron , Wajax-Padfic Fire Equipment , Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"...to foam solution propor t ioner shou ld be sized to allow fuU flow at the discharge aper ture k~enin~ in m i n d sizin~ c h a n ~ s can create dramatic velociW changes and fo~rn mix oroblevns. - SUBSTANTIATION: Sizing up in plpin~,/valve sizes after air to foam solution can potentialIy cause vibration. This should be noted. COMMITI°EE ACTION: REject. C O M M I T r E E STATEMENT: See commit tee action on p.ublic c o m m e n t 1906-77 (Log #21) which deletes this paragraph.

(Log #47) 1906- 83 - (14-5(c)): Reject SUBMrI'I 'ERa D.W. McKenzie, ForestService-USDA COMMENT ON PROPOSAL N O : 1906-233 RECOMMENDATION: Revise as follows:

(c) T h e tankfi l l line shall be dosed, o SUBSTANTIATION: Delete "and by-pass cooling line" because the cooling line shou ld not have a valve in it. C O M M I T [ E E AGTION: Reject. C O M M I T I ~ E STATEMENT: The by-pass cooling line should be closed to ge t an accurate reading. If the cooling l ine does no t have a valve in it, it can be d isconnec ted and p lugged for this test.

( Log #103) 1906- 79 - (10-8.5): Accept SUBMITTER: Brian CaBle, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATION: Delete paragraph 10-8.5. SUBSTANTIATION: T he paragrapti is ~lesi~n restrictive a n d does no t establish a m i n i m u m requi rement . Existang systems with this feature do not aid the operator by providing step sequenc ing display and the addi t ion of system overr idefea tures do no t establish a m i n i m u m per formance criteria. COMMITTEE ACTION: Accept.

(Log #74) 1906- 80 - (12-1): Accept in Principle SUBMITTER: Matthew Daschel, Warn Industries, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise 12-1 to read as follows:

"General. If a winch is installed on the apparatus, it shall mee t the requ i rements of this Chapter a n d of the Society of Automotive Enngqn (5 E ) ' n e e r s SAE StandardJT06." SUBSTANTIATION: The SAEJ706 s tandard is used as the winch

r formance s tandard for U.S. commercia l winch manufacturers . is s tandards is accepted as industry practice in the t o w i n g a n d

recovery industry and shou ld also be adop ted by the NFPA for emergency vehicles which are used in similar si tuations as towing and recovery vehicles. COMlVflTI'EE ACTION: Accept in Principle.

Revise 12-1 to read as follows: "General. I r a winch is installed on the apparatus, it shall mee t the

requi rements of dais chapter and SAEJ706;~ating of Winches ." ANd "SAE]706-1985, Ritting Of Winches" to 15-1.7.

COMMITI 'EE STATEMENT: -The commit tee is accept ing the addi t ion of a reference to SAE J706 a n d has editorially changed the submit ted text for consistency with the s tandard.

(Log #73) 1906- 81 - (12-3.1.1): Accept SUBMITTERa Matthew Daschel, Warn Industries, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise 12-3.1.1 to read as follows:

"Control of the electric motor shall be by m e a n s of a h a n d h e l d switch with forward, neutra l and reverse positions. T he switch shall be located at the end of a m i n i m u m 25 ft (7.6 m) electrical cord tha t plugs into a receptacle nea r the winch location. Alternately, the switch may be located on a h a n d h e l d t ransmit ter of a Federal Communica t ions Commiss ion approved radio f requency winch control device." SUBSTANTIATION: It is c o m m o n to f ind radio f lequency devices used to control winches and hoists on mobile equ ipment .Typica l ly , use of a radio f requency device is requi red when a h a z a r d o u s si tuation does no t allow the operator to be within 25 ft. of the winch but still in visual range o f it. COMMITTEE ACTION: Accept.

(Log #43) 1906- 82 - (12-3.3.1): Accept SUBMITTER: David B. Harrison, New Jersey Forest Fire Service COMMENT ON PROPOSAL NO: 1006-233 RECOMMENDATION: Revise as follows:

"A m i n i m u m o f a ~ cold cranking a m p (CCA) battery suBst em..."

TANTIATION: Based on m i n i m u m battery capacity stated in paragraph 3-3.3.4 of 850 CCA, a dual battery system of this size woul~l equal 1,700 CCA~ Therefore, m i n i m u m CCA for battery system should be reduced to 1,700. C O M M I T r E E ACTION: Accept.

(Log #46) 1906- 84 - (14-8): Reject SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise as follows:

" . . .foam concent ra te within + 15% percen t at .5 concentra t ion f rom 10% to 100% of manufac tu re r ' s s tated range of water flow and pressure." SUBSXANTIATION: None . COMMITIT.E ACTION: Reject. COMMITTEE STATEMENT: Given the cur ren t technology being used, 25 percen t appears to be the best that can be expected f rom the general industry as a m in imum. Some manufac ture rs are able to achieve a bet ter accuracy and a purchaser can ask for more accuracy if they desire. Also the commit tee does no t see any need to limit the lower end of the range r equ i r emen t as the manufac tu re r establishes tha t range and the r equ i r emen t is that the e q u i p m e n t be accurate over tha t stated range.

(Log #88) 1906- 85 - (14-9.1.2, 14-9.2): Accept in Principle SUBMITTER: Mark A. Conron , Wajax-Pacific Fire Equipment , Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: In 14-9.1.2 and 14.9.2 place the following disclaimer at the bo t tom of each paragraph.

"Please ensure Hose OEM has approved the in t ended fire hose for use with CAFS systems." SUBSTANTIATION: Hose OEM's are becoming increasingly conce rned tha t compressed air in hoses is dangerous and unsafe. To tha t end, we shou ld publish a disclaimer that any hose be approved for use with compressed air foam systems by the Hose OEM. This would impact 14-9.1.2 and 14.9.2. COMMITTEE ACTION: Accept in Principle.

Add an append ix i tem in the s t andard for 14-9.1.2 a n d 14-9.2 which states "The person conduc t ing the test should check with the manufac tu re r o f the hose be ing used to ensure the hose has been

nSMMiTrroved for use with Compressed Air Foam Systems." EE STATEMENT: The commit tee is aware of the

problems some people are having with fire hose used with CAFS systems a n d feels tha t where this is an appara tus s t andard an d n o t a hose standard, it is best hand led by an append ix i tem advising the person conduc t ing the test to check with the hose manufac tu re r as to whether the hose can be used for CAFS applications.

(Log #22) 1906- 86 - (14-9.2): Accept in Principle SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATION: At the end of 5th sentence, after "without operator intervention" acid "with water t ank at 1 / 4 level" SUBSTANTIATION: Makes test more realistic, this is what will h a p p e n in the field. COMMIT[EF-ACTION: Accep t i n Pr indple .

Revise the fifth sentence to read: "With the water tank at the one quar te r full level, the valve at the discharge end of the hose shall be shu t and the engine(s) speed shall be ma in ta ined for a per iod of 15 rain without discharging water, air, or foam solution from the uni t and without operator intervention." COMMITTEE STATEMENT: The commit tee is add ing the suggest ion at the beg inn ing of the sentence ra ther than the end as it makes more sense sequentially there. They are also adding the word "full" to clarify what the one quar ter referred to, full or empty.

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(Log #87) 1906- 87- (14-11): Accept in Principle SUBMITTER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows: "The Contractor shall supply, at the t ime of delivery," if annlicable at least..." SUBSTANTIATION: If loose equi'p'ment-less actual roiling stockis supplied, then it's not possible to provide weight documents such as in 14-11 (e). COMMITTEE ACTION: Accept in Principle. Add text to the end of 14-11 (e) which reads: "except when a slip-on

uni t is supplied without a chassis." COMMI'ITEE STATEMENT: The committee feels the only exception is the slip-on unit supplied without a chassis and is therefore addressing that directly.

(Log #38) 1906- 88 - (A-3-1.1): Accept SUBMITTER: Ted Rex, Bureau of Land Management, NIFC at Boise, ID ,~' COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Amend port ion of first sentence to read... .the apparatus designed hose load; THE EQUIPPED PERSONNEL WEIGHT;... SUBSTANTIATION: Allows this s tatement to conform to changes proposed to 3-1.1. COMMITI'EE ACTION: Accept.

(Log #40) 1906- 89 - (A-3-1.2): Reject SUBMITTER: Ted Rex, Bureau of Land Management, NIFC at Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Amend to read: A WEIGHT OF 250 LB (114 KG) FOR A FULLY EQU IPPED FIRE FIGHTER IS THE NFPA STANDARD AND WILL BE UTILIZED. SUBSTANTIATION: This provides for a uniform standard for the manufacturers to utilize in designing wildland apparatus. COMMITTEE ACTION: Reject. COMMITI'EE STATEMENT: This appendix item has been dele ted by action on public comment 1906-9 (Log #37).

( Log #12) 1906- 90- (A-4-4.4): Accept in Principle SUBMITTER: J im Stumpf, Incident Management Consultant~ COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add.the pumping of retardants, wet water or other suppressants to the reason for having bronze parts of the

~U'~'TANTIATION: It is more common for wildland tire fighters to pump retardants or other suppressants than it is to pump salt water. COMMITrEE ACTION: Accept in Principle.

Revise the first paragraph of A-4-4.4 to read: ~Pumps and piping f requendy required to p u m p salt water, water with additives, or other corrosive waters should be built o f bronze or other corrosion resistant materials. For occasional pumping of such water, pumps built of other materials are satisfactory if properly flushed out with fresh water after such use. ~ COMMITFEE STATEMENT: The committee is revising the text to include the general concept that "water with additives ~ needs to be considered when deciding on pump materials. It is also recognizing there may by other corrosion resistant materials that could be used for pump construction under these conditions.

(Log #93) 1906- 91 - (A-4-4.4): Accept in Principle SUBMITrER: Mark A. Conron, Wajax-Pacific Fire Equipment, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

"Should be bronze" or of a material st~ecificallv des i tmed/ in tended v

for salt water usage. SUBSTANTiATI~ON: Allowing bronze only is a design s p e c and precludes the use of new material that may exist or be found that meets the performance standard of being acceptable for use in a salt water environment. COMMITrEE ACTION: Accept in Principle.

COMMITTEE STATEMENT: See committee action on public comment 1906-90 (Log #12).

(Log #23) 1906- 92 - (Figure A-9-3.2(a), (b), (c), A-9-3.3(a), (b), (c), A-3-4 (a), (b), (c), A-3.5): Reject SUBMITrER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise text as follows:

Symbol for check valve is no t correct, use s tandard hydraulic symbols

SUBSTANTIATION: Correction of symbol. COMMITI'EE ACTION: Reject. COMMITrEE STATEMENT: The symbol used is a water system symbol and is also correct.

(Log #24) 1906- 93 - (A-9-3.2(c) (New)): Reject SUBMITI'ER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add text as follows: "(c) foam solution contaminates total pump, very likely will also get into water tank." SUBSTANTIATION: Short coming, which needs identifying. COMMITrEE ACTION: Reject. COMMITTEE STATEMENT: See committee action on public comment 1906-54 (Log #54) which deletes the spedf ic lists of advantages and limitations for each system.

(Log #69) 1906- 94 - (A-9-3.3): Accept SUBMITFFA~ Ron Rodma , Boise, ID COMMENT ON PROPOSAL NO: 1906-233" RECOMMENDATION: Delete the last two sentences in pmagraph 3:

(Accurate foam proport ioning is available over a wide range of flow and pressure. The foam concentrate pump can be used to refill the foam concentrate tank at any time, even when the ~]stem is operating.) NOTE: If the first sentence is used then add it to the description of the bladder system ment ioned prior.

Delete the list of advan. ~ e s . Without a .list of the disadvantages of the s ~ t e m we are nusleading the fire serwce mark¢.~. SUBSTANTIATION: Third paragraph, last sentence: The foam concentrate pump can be used to refill the foam concentrate tank at any time, even when the system is operating.

I don ' t think this is what was trying to be said? I should say: The foam concentrate tank can be refilled when the concentrate pump is running with interrupting foam generation.

I d o n ' t feel it is appropriate to draw a comparison to other devices by listing the limitation of other automatic propor t ioning system. What are the limitations of this system? The advantages are listedl COMMIaWEE ACTION: Accept. COMMITI'EE STATEMENT: See committee action on public comment 1906-54 (Log #54) which deletes the spedf ic lists of advantages and limitations for each system.

(Log #70) 1906- 95 - (A-9-3.3): Reject SUBMITTER: Ron Rochna, Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Suggested wording for the standard:

(d) Uni t cannot be recharged when the system is in operation. Unit cannot be recharged when the system is in 9peration unless two vressure vessels are us~l . "Why is this the only system that has a list of limitations written about it? Where is the list of the advantages?

I suggest removing all lists that list the positive and negative features of the automatic systems. SUBSTANTIATION: Second paragraph, last sentence reads: "Pressure proport ioning systems have the following limitations:".

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Sta tement (d) which states "Unit canno t be recharged when the system is in operation." is only partially true. The fire service and the industry has r emed ied this p rob lem by us ing two pressure vessels. COMMITrEE ACTION: Reject. COMMITrEE STATEMENT: See commit tee act ion on public c o m m e n t 1906-54 (Log #54) which deletes the specific lists of advantages and limitations for each system.

(Log #26) 1906- 96 - (A-9-3.3(d) Second System): Accept SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete (d), or reword it. SUBSTANTIATION: All balanced pressure and direct injection systems can by design or installation do (d), so we mus t list so on each system, or reword it, or delete it. COMMITrEE ACTION: Accept. COMMITrEE STATEMENT: See commit tee action on public c o m m e n t 1906-54 (Log #54) which deletes the specific lists of advantages and limitations for each system.

(Log #25) 1906- 97- (A-9-3.3(e)): Reject SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATION: Add text as follows: "(e) it is difficult to de te rmine foam concentra t ion level." SUBSTANTIATION: Short coming, which needs identifying. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: See commit tee action on public c o m m e n t 1906-54 (Log #54) wh ichde le t e s the specific lists of advantages and limitations for each system.

(Log #31) 1906- 98 - (A-9-3.4(b)): Reject SUBMITTER: Robert Barraclough, Span Ins t ruments COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete second paragraph u n d e r i tem (b) that describes conductivity sens ing dire'ct injection foam proport ioning and figure A-9.3.4(c). SUBSTANTIATION: This m e t h o d of p ropor t ion ing is so new that we have no exper ience to guide us on the parameters , the installation or the expected service life. Wi thout some experience with this type o f system, it is r e c o m m e n d e d tha t we delete any reference in this d o c u m e n t and hold this for future editions. COMMI'ITEE ACTION: Reject. COMMITI'EE STATEMENT: This technology has been used for years to measure mat ter in water and is now being used to measure the percentage of foam concentrate, in solution.. I t has been recognized by the NFPA Techmca l Comrmttee on Foam for inclusion in NFPA 11, S tandard for Low Expansion Foam.

(Log #27) 1906- 99 - (A-10-2 Surge): Accept SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: In the definit ion of surge, delete everything after first sentence. SUBSTANTIATION: Not part of defini t ion or reword. COMMITTEE ACTION: Accept.

(Log #33) 1906- 100 - (A-10-3.4): Accept in Principle SUBMITTEI~a Brian Hutchins , Michigan Dept. Natural Resources COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: This test does no t specify the parameters needed . Container dimensions, fluid pressure and discharge

~ at tern are no t de te rmined . Splash back is no t addressed. I do no t ave the exper ience with these systems ~o identify the o p t i m u m

parameters . SUBSTANTIATION: This test canno t be replicated as stated. COMMITTEE ACTION: Accept in Principle.

Delete A-1003.4 mad add an append ix to A-1005 to read as follows: A-1003.4 f l i t is desired to test the expansion ratio, the following

test is r ecommended .

Equ ipmen t Gram scale, 1500 g ram capacity accurate to 0.1 g r a m O n e 10000ml conta iner which can be struck at 10000ml (a 10000ml

gradua ted cylinder cut o f fa t 1000-ml will work well. Place the empty container on the scale and zero the scale. Using

the container, collect a full sample of foam and stril~e the foam at the 10000ml level. Place the container on the scale a n d read the mass in grams.

Expansion ratio = 100 Foam mass in grams*

* Note: This assumes that one g ram of foam solution occupies one ml of volume. COMMITrEE STATEMENT: The commit tee has learned of ano the r test which is m u c h s impler a n d easy to replicate an d as such is r e c o m m e n d i n g this o ther test method . Paragraph 10-3.4 has been deleted[see Public C o m m e n t 1906.74 (Log #101)]. The commit tee wishes to retain a suggested test for expans ion ratio an d is showing it as an append ix to 10o5.

(Log #71) 1906- 101 - (A-10-3.4): Reject SUBMITTER: Ron Rochna, Boise, ID COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise the second sentence in the third paragraph to read:

The foam sample is allowed to s tand for 60 minutes to allow the foam solution to dra in out. The bot tom drain is o p e n e d an d the solution collected in a g radua ted container. The expansion of the foam is calculated as:

Expansion = 60 gallons of foam Gallons of d ra ined solut ion

Expansion = 228 liters of f oam Liters of d ra ined solution

SUBSTANTIATION: The sentence is poor lywri t ten an d the formula that follows the paragraph is incorrect. COMMITTEE ACTION: Reject. COMMITTEE STATEMENT: The commit tee is d rop p in g this suggested test and replacing it with ano the r test. See commit tee action on public c o m m e n t 1906-100 (Log#33) .

(Log #28) 1906- 102- (A-10-8.6): Accept SUBMITTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Delete the words "and air flow such that ins t rumenta t ion is of little use to the operator" and replace t h em with " However, ins t rumenta t ion is still useful to the operator. Even automat ic systems have ad jusunents and pe r fo rmance limits which warrant ins t rumenta t ion." SUBNTANTIATION: Automat ic systems d o n ' t need ins t rumenta- t ion is no t correct. COMMITrEE ACTION: Accept.

(Log #72) 1906- 103 - (A-12-4.4): Accept SUBMITTEI~ Matthew Daschel, Warn Industries, Inc. COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Revise A-12-4.4 to read as follows: •

"The forward-neutral-reverse hydraulic control for the winch should be power operated to permi t remote control of the hydraulic winch operations. The remote control device should be of a design tha t automatically re turns to neutral when released. The remote control should have at least 25 ft. (7.6 m) of cable. Alternately, the remote control may be accompl ished by a Federal Communica t ions Commiss ion approved radio f requency winch control device." SUBSTANTIATION: It is c o m m o n to f ind radio f requency devices used to control winches and hoists on mobile equipment . Typically, use of a radio f requency device is requi red when a h a z a r d o u s si tuation does no t allow the operator to be within 25 ft. of the winch but still in visual range of iL COMMITrEE ACTION: Accept.

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(Log #44) 1906- 104- (A-14-8): Accept in Principle in Part SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Ne ed more than three points (say 5 to 10).

Photo is no t of e q u i p m e n t listed in " equ ipmen t required". SUBSTANTIATION: None. COMMITFEE ACTION: Accept in Principle in Part.

Delete t h e p h o t o . COMMITrEE STATEMENT: The industry is us ing 3 points regularly now. A person can use more points if they desire to obtain a more precise line.

The commit tee agrees the p h o t o g r a p h is incorrect and is removing it.

(Log #45) 1906- 105 - (A-14-8): Accept in Principle SUBMITrER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Test Method 2 (refractometer) should no t be used on class "A" foam when test ing less t han 1%. SUBSTANTIATION: At less than 1% refractometer m e t h o d is no t very accurate. COMMITTEE ACTION: Accept in Principle.

Revise test m e t h o d 2 to read as follows. Tes t Method 2. With the foam system in opera t ion at a given flow,

a solution sample is collected f rom each outlet and the concentra- t ion measu red us ing a ref rac tometer to measu re the refractive index of the foam solut ion samples. This m e t h o d may no t be particularly accurate for AFFF or alcohol resistant f oam and certain other types of f oam that typically exhibi tvery low refractive index readings. For this reason the conductivity m e t h o d may be preferred when these products are used.

Equ ipmen t r equ i rement . A base (calibration curve is p repared us ing the following apparatus.

(a) Four I00 ml (or larger) plastic bottles with caps. (b) One measur ing pipet te ( I0 ml) or syringe (I0 cc). (c) One i00 ml (or larger) g radua ted cylinder. (d) Three plastic-coated magne t ic st irring bars. (e) A ref rac tometer (f) Standard graph paper. (g) Ruler or o ther s t raight edge. Using the water and foam concent ra te f rom the system to be tested,

make up three s tandard solutions us ing the 100 ml (or larger) graduate. These samples shou ld include the nomina l in t ended percentage of injection, the nomina l percentage p lus 0.3 percent , and the n o m i n a l percentage mi nus 0.3 percent . Place the water in the 100 ml (or ]arger) graduate (leaving adequate space for the foam concentrate) a n d t hen carefully measure the foam concentra te samples into the water us ing the pipette or syringe. Use care no t to pick up air in the foam concentra te samples. Pour each measu red foam solution f rom the 100 ml (or larger) graduate into a I00 ml (or larger) plastic bottle. Each bottle shou ld be marked with the percen t solution it contains. Add a plastic st irring bar to the bottle, cap it and shake thoroughly to mix the foam solution. After thoroughly mix ing the foam solution samples, a refractive

index reading is taken of each percentage foam solution sample. This is done by placing a few drops of the solution on the refracto- mete r pr ism, closing the cover plate, and observing the scale reading at the dark field intersection. Since the refractometer is temperature compensated , it may take I0 to 20 seconds for the sample to be read properly. It is impor tan t to take all refractometer readings at ambien t tempera tures of 50 ° F ( I0 ° C) or above.

Us ing standard, gr~aph paper, plot the refractive, index read ing . on one axis agaanst the pe rcen t o f concentra t ion on the other. This plot ted curve will serve as the known base line for the test series. Set the solution samples aside in the event the measu remen t s need to be checked.

Sampl ing and Analysis. Collect f oam solution samples f rom the propor t ioning system us ing care to be sure the sample is taken at an adequate dis tance downst ream f rom the propor t ioner be ing tested. Take refractive index readings of the sample and compare t h e m to the plot ted curve to de te rmine the percentage of the sample. COMMITTEE STATEMENT: The commit tee agrees tha t cur ren t h a n d he ld refractometers are no t very accurate with Class A foams. However, the commit tee wishes to leave a discussion of a concentra- t ion test us ing a ref rac tometer in the d o c u m e n t as there are o ther refractometer ins t ruments that can read Class A foam concentra- t ions accurately. The commit tee has revised the descript ion of the test m e t h o d to make it more generic.

(Log #65) 1906-106 - (A-14-8): Accept in Principle SUBMITTER: D.W. McKenzie, Forest Service-USDA COMMENT ON PROPOSAL NO: 1906-233 RECOMMENDATION: Add Me thod 5. Use foam percen t me te r (New Zealand Institute of Geological and Nuclear Sciences Ltd). SUBSTANTIATION: The New Zealand Institute of Geological an d Nuclear Sciences Ltd has a foam percen t me te r which will read in real t ime percen t of foam (Class "A'). This is a very easy m e t h o d to use and the accuracy is very good.

Address: Institute of Geological and Nuclear Sciences Ltd. Attn: Dr. Gavin Wallace 30 Gracefield Road Lower Hutt , New Zealand 64-4-569-0637

C O M M I T F E E A C T I O N : Accept in Principle. Revise test m e t h o d 4 to read as follows. Test Method 4. Conductivity Test Method. The conductivity test m e t h o d is based on changes in electrical

conductivity as f oam concentra te is added to water. Conductivity is a very accurate m e t h o d providing there are substantial changes in conductivity as f oam concentra te is added to the water in relatively low percentages. Since salt or brackish water is very conductive, this m e t h o d ma x no t be suitable due to small conductivity changes as foam concentrate is added. It will be necessary to make foam an d water solutions in advance to de te rmine if adequate changes in conductivity can be detected f f the water source is salty or brackish. Three me thods can be used to de te rmine the percent of foam solution by the conductivity me thod .

A. Direct reading conductivity test me thod . B. Conductivity compar i son method . C. Conductivity calibration curve method .

A. Direct Reading Conductivity Test Method. Equ ipmen t Requi red

Two 100 ml or larger containers One direct reading foam solution conductivity meter .

Procedure: Obtain a sample o f the water to be used in the test us ing one of the 100-ml or larger containers. Immerse the conductivity mete r head in the water sample arm zero the mete r display. If the direct reading foam solution conductivity mete r m o u n t s directly in a discharge line, zero the mete r with plain water flowing.

If the conductivity me te r manufac tu re r does no t indicate that the percentage of foam solution can be read direcdy fi)r the foam concentra te being used, a calibration curve mus t be developed. The calibration curve may show that the direct me te r readings are correct for the foam concentra te being used or it may indicate that the calibration curve mus t be used when that foam concentra te is used.

Opera te the foam propor t ioning system and obtain a sample of the solution p roduced by the system using the other 100-ml or larger container. Immerse the conductivity me te r head in the foam solution sample and read the percentage of the fo:un solution on the me te r display.

B. Conductivity Compar ison Method. Two 100 ml or larger containers .. Conductitcity me te r reading in las /cm (micros iemens per

centimeter) Procedure: Obtain a sample of the water to be used in the test

us ing one of the 100-ml or larger containers. Using the conductivity meter , de te rmine the conductivity valve of the water sample.

Opera te the. foam pro,[3otxioning system, and obtain a sample of the foam solution p r o d u c e d b y the system u s m g the o ther 100-ml or larger container. Using the conductivity meter , de te rmine the conductivity value of the foam solution sample.

Subtract the conductivity value of the water sample f rom the conductivity value of the foam solution sample anti divide the result by 500 to get the pe rcen t of foam.

Conductivity of foam solution - conductivity of water = % of foam 5OO

Note: 500 is Used as the divisor a s suming tha t the conductivity mete r units are 0 s / c m (micros iemeus per cent imeter) . Other uni ts of conductivity can be used bu t will require the value of the divisor (500) to be adjusted.

C. Conductivity Calibration Curve Method. A h~nd-held conductivity mete r is used to measure the conductivity of foam solutions in micros iemen units.

Equ ipmen t Required. Prepare a base (calibratiola) curve using tile following apparatus:

(a) Four 100 ml (or larger) plastic bottles with ctps. (b) One measur ing pipette (10 ml) or syringe (10 cc). (c) O n e 100 ml (or larger) g radua ted cylinder. (d) Three plastic-coated magne t ic stirring bars.

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(e) Portable temperature compensated conductivity meter - Omega Model GDH-70, VWR Scientific Model 23198-014, or equal.

(f) Standard graph paper. (g) Ruler or other straight edge. Procedure. Using the water and foam concentrate from the system

to be tested, make up three standard solutions using the 100 ml (or larger) graduate. These samples should include the nominal in tended percentage of injection, the nominal percentage plus 0.3 percent, and the nominal percentage minus 0.3 percent. Place the water in the 100 ml (or larger) graduate (leaving adequate space for the foam concentrate) and then carefully measure the foam concentrate samples into the water using the pipette or syringe. Use care not to pick up air in the foam concentrate samples. Pour each measured foam solution f rom the 100 ml (or larger) graduate into a 100 ml (or larger) plastic bottle. Each bottle should be marked with t h e p e r c e n t solution it contains. Add a plastic stirring bar to the bottle, cap i t a n d shake thoroughly to mix the foam solution. After making the three foam solutions in this manner , measure the

conductivity of each solution. Refer to the instructions that come with the conductivity meter to de termine proper procedures for taking readings. It will be necessary to switch the meter to the correct conductivity range setting in order to obtain a proper reading. Most synthetic-based foams used with fresh water will result in foam solution conductivity readings of less than 2000 microsiemens. Protein-based foams will generally produce conductivity reading in excess of 2000 in fresh water solutions. Due to the temperature compensat ion feature of the conductivity meter it may

take a short time to obtain a consistent reading. Once the solution samples have been measured and recorded, set

the bottles aside for control sample references. The conductivity readings should then be plotted on the graph paper. It is most convenient to place the foam solution percentage on the horizontal axis and conductivity readings on the vertical axis.

Use a ruler or straight edge to draw a line that approximates connect ing all three points. While it mayno t be possible to hit all three points with a straight line, they should be very close. If not, repeat the conductivity measurements and if necessary make new control sample solutions until all three points plot in a nearly straight line. This plot will serve as the known base (calibration) curve to be used for the test series.

Sampling and Analysis. Collect foam solution samples from the proport ioning system using care to be sure the sample is taken at an adequate distance downstream from the proport ioner being tested. Using foam solution samples that are al lowedto drain from expanded foam mayproduce misleading conductivity readings, and. therefore, this procedure is not recommended .

Once one or more samples have been collected, read their conductivity and f ind the corresponding percentage from the base curve prepared f rom the cont ro lsample solutions. COMMITTEE STATEMENT: The committee has revised the discussion of test method 4 to discuss the three different conductivity tests currently available. This gives the user a better choice of options with this test method.

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richard w. dreher, los angeles city fire deparunent, ca (alt. toj. … · 2015. 11. 13. · nfpa...

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