{_~ hn P. Morello, NY Fire Dept., NY

Report of the Commttee on Fre Department Apparatus Howard L. McMllen, Char Cty of Fort Worth Fre Dept., TX Kenneth L. Koch, Secretary Sutphen Corp., OH RobertJ. Barraclough, Span nstruments, TX frey Bowman, Anahem Fre Dept., CA ph Carven, Msson College, CA Rep. Calforna Fre Mechancs Assn. Wllam J. Darley, W. S. Darley & Co., L Rep. Natonal Truck Equpment Assn. Ron French, Napervlle,L Denns N. Gage, LSO Commercal Rsk Servces, nc., NJ Jeffrey H. Haase, Emergency One, nc., FL Gary Handwerk, Hale Products nc., PA Scott H. Krueger, Perce Manufacturng nc., W1 Calvn S. Kunlde, Purdue Unversty, N Robert McKeon, Occum Volunteer Fre/Ambulance Department, CT Rep. Natonal Volunteer Fre Councl W. Kenneth Menke, Fre Servce Research nst., MO {_~ hn P. Morello, NY Fre Dept., NY enz E. Otte, Waterous Co., MN Carl E. Punkay, Champagn Fre Dept., L Roger A. Ruth, Chubb Natonal Foam nc., PA Rep. Fre Apparatus Manufacturers Assn. James A. Salm], Smon-Ladder Towers nc., PA Alan Sausbury, Saulsbury Fre Apparatus, NY BradleyJ. Schmdt, Underwrters Laboratores nc., L Gary B. Selg, Calforna Dept. of Forestry, CA Joseph P. Shovln, Securty Fre Protecton Dstrct, CO Stephen L. Smth, Farfax County Fre/Rescue Dept., VA Terry M. Sutphen, Unversty of llnos, L Rep. llnos Fre Servce nsttute Robert D. TutterowJr., Charlotte Fre Department, NC Alan D. Van Gulder, Reno Fre Department, NV Antono L ~/'dlegus, U.S. Navy, CA Wllam yon ZehleJr., Wlton Fre Department, CT Rep. nternatonal Assocaton of Fre Chefs Davad Whlte, Fre & Safety Specalsts, nc., "X Boyd F. Cole, Underwrters Laboratores nc., L (/kt. to B.J. Schmdt) Peter F. Darley, W. S. Darley & Co., L (Alt. to W.J. Darley) Joseph L. Donovan, Jackson Fre Dept, MS (Alt. to W. yon Zehle) Rchard W. Dreher, Los Angeles Cty Fre Deparunent, Ca (Alt. toj. P. Morello) Ronald L. Ewers, Class nc., FL (Alt. to R. A. Ruth) John McDonald, nt'l Assn. of Fre Fghers, VA (Alt. to W. L Menke) Mchael R. Negro, Perce Manufacturng nc., W (Alt. to S. H. Krueger) Stephen Patrck Nethero, Sutphen Corp., OH (Alt. to K. L. Koch) Gary L Pope, Farfax County Fre/Rescue Department, VA (Alt. to S. L. Smth) Phlp Sayer, Gat Fre Department, MO (Alt. to R. McKeon) Edward S. Straw, SO Commercal Rsk Servces nc., GA (Alt. to D. N. Gage) Rchard E. Teske, Hale Fre Pump Co., PA (Alt. to G. Handwerk) Tom Whtworth, Emergency One, nc., FL (Alt. toj. H. Haase) Wllam F. Foley, Orland Park, L (Member Emertus) Staff Lason: Carl E. Peterson Nonvotng Ths lst represents the membershp at the tme the Commttee was balloted on the text of ths edton. Snce that tme, changes n the membershp may have occurred, Commttee Scope: Ths Commttee shall have prmary responsbuty for documents on the desgn and performance of fre apparatus for use by the fre servce. Ths porton of the Techncal Commttee Report of the Commttee on Fnm Department Apparatus s presented for adopton. Ths Report on Comments was prepared by the Techncal Commttee on Fre Department Apparatus and documents ts acton on the comments receved on ts Report on Proposals on NFPA 1906, Standard for Wldland Fre Apparatus, as publshed n the Report on Proposals for the 1994 Fall Meetng. Ths Report on Comments has been submtted to letter ballot of the Techncal Commttee on Fre Department Apparatus whch conssts of 50 votng members; of whom 28 voted affrmatvely, and 2 ballots were not returned (Messrs. Craven and Vllegas). 86

NFPA 1906 -- F94 ROC (Log #1 $) 1906-1 - (1-1): Accept SUBM1TTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATON: Delete last sentence: "Ths apparatus s not ntended for nteror structural fre fghtng." SUBSTANTATON: Ths truck wth mnor loose equpment addtons could meet many state mnmum SO Class 9 standards] s t our job to say what a wldland truck could be used for, f so equpped? COMMT'EE ACTON: Accept. (Log#61) 1906-2- (1-3 Center of Gravty): Accept SUBMTrEPa D.W. McKenze, Forest Servlce-USDA RECOMMENDATON: Revse the defnton of center of gravty as follows: Center of Gravty s the pont at whch the entre weght of the fre truck may be consdered as concentrated so that f supported at ths pont the body would reman n equalbrum n any poston. SUBSTANTATON: Center of Gravty defnton s not correctl Ths has to be changedl COMMr'rEE ACTON: Accept. (Log #64) 1906-3 - (1-$ Compound Gauge): Accept COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATON: Revse the defnton of Compound Gauge as follows: "... zero equal atmosphere pressure...". SUBSTANTATON: The zero on a compound gauge s not 1 atmosphere. Ths must be changed. s ncorrect as t s. (Log #6O) 1906-4- (1-3 Dynamc Sucton Lft): Accept COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATON: Revse the defnton of Dynamc Sucton Lft as follows: "...hose expressed n feet of water head ". SUBSTANTATON: None. COMMTFEE ACTON: Accept. SUBSTANTATON: Years of wldland experence ndcate these types of tems ARE OR WLL be added to the apparatus and has resulted n major overloadnl~. COMMrrrEE Ac~rON: Reject. COMMTrEE STATEMENT: Whle the commttee s rejectng the addton of an addtonal defnton, t s usng muclll of the text s a descrptve way n A-3-1.1. (See commttee acton or, publc comment 1906-9 (Log #37). (Log #94) 1906-7 - (2-5.1 (b)): Accept n Prncple SUBMTrER: Rck sler, Washngton State Dept. of Natural Resources Apparatus desgnated as emergency vehcles (.e.: red lghts & srens) shall from a steady speed of 15 mph be able :o accelerate to a true speed of 35 mph wthn 30 seconds ~thout movng the gear selector. Apparatus not desgnated as emergency vehcles (.e. no red lghts & sren) shall be exempt. SUBSTANTATON: Agency apparatus are not desgned as emergency vehcles. As such theyare not allowed to drve outsde the normal laws of the.state. Shftng gears to accelerate s not a desgn flaw and should be allowed. COMMT'~ ACTON: Accept n Prncple. Delete 2-5.1(b) and 14-10.$.2. COMMTrEE STATEMENT: The commttee revewed the requrement and feels t s no longer applcable, gven the ncreased use of automadc transmssons and the ncrease n engne power avalable on all vehcles. The requrement s stated!n 2-5.1-(b) and the test n 14-10.3.2. (Log#l) 1906-8 - (3-1.1): Accept n Prncple SUBMTXR: Jm Stumpf, ncdent Management Consultants COMMENT ON PROPOSAL NO: 1906-255 RECOMMENDATON: GVWR should nclude all weghts consdered ncludng those personnel weghts consdered. The 200 pound personnel weght addressed later n the document must be ncluded n the overall GVWR consderaton. SUBSTANTATON: The entre secton seems confusng. Cannot offer suggestons to mprove. COMMTqgEACTON: Accept n Prncple. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-9 (Log #37). (Log#$5) 1906-5 - (1-3 Fully Equpped Apparatus (New)): Reject SUBMTTER: Ted Rex, Bureau of Land Management, NFC at Bose, D COMMENT on PROPOSAL NO: 1906-253 RECOMMENDATON: Add a new defnton: FULLY EQUPPED APPARATUS: ncludes full water tanks, foam tanks, fuel tanks, hose complement, tool and adapter complement, the fully equpped fre fghter weghts for all occuped seats n the apparatus desgn. SUBSTANTATON: Provdes for unformty n desgn crtera. The apparatus needs to be desgned wth ALL tems t wll carry. A mscellaneous allowance should then be added. Extensve experence by the wldand agences has ndcated ths to be a major area of desgn shortcomngs. COMMT'EE STATEMENT: The commttee s revsng 3-1.1 and 3-1.2 and feels that wth the changes, the term s adequately descrbed and does not need a separate defrton. See commttee acton on publc comment 1906-9 (Log #37). (Log #30) 1906-6 - (1-3 Mscellaneous Equpment (New)): Reject SUBMTTER= Ted Rex, Bureau of Land Management, NFC at Bose, D COMMENT ON PROPOSAL NO: 1906-253 RECOMMF.NDATON: Addtonal defnton: MSCELLANEOUS EQUPMENT: Defned as that addtonal equpment that s requred to meet specfc operatonal requrements of the department, e., addtonal hose, chan saws, ratons, tow chans, tre chans, drnkng water contaners, ce chests, addtonal hand tools, and addtonal contaners of foam concentrate. (Log #$7) 1906-9 - (3-1.1): Accept n Prncple SUBMTrER: Ted Rex, Bureau of Land Management, NFC at Bose, D RECOMMENDATON: Amend to read: The GAWRand GVWR of the chasss shall be adequate to carry the fully equpped apparatus ncludng full water tank, fuel tanks, and all other reservors; the apparatus desgned hose load; THE TOOL AND ADAPTER COMPLEMENT; the EQUPPED PERSONNEL W1HGHT, and a mscellaneous equpment allowance. THE APPARATUS SHOULD BE DESGNED TO CARRY AT LEAST THE MNbUM WEGHT, AS SHOWN N'TABLE 3-1.1, FOR MSCE$_ANEOUS EQUP- MENT. ' SUBSTANTATON: Ths better defnes the carryng capacty and desgn r~rement. Revse 3-1.1 to read: The GAWR and GVWR of the chasss shall be adequate to carry the fully equpped apparatus ncludng full water tank, fuel tanks, and all other reservors; the apparatus desgned hose load; the EQUPPED PERSONNEL WEGHT, and a mscellaneous and mnor equpment allowance. The mscellaneous and mnor equpment allowance shall be at least equal to the weght as shown n Table 3-1.1. Add an addtonal paragraph to A-3-1.1 as the f~: paragraph. The p~.~ph should read as follows: ~fhe purchaser.~hould specfy the weght of the equpment to be carred flt s n excess of the allowance for mscellaneous and mnor equpment. Ths allows a chasss wth an adequate GAWR and GVWR to be suppled. Specfc addtonal equpment often requred to meet operatonal requrements of the department could nclude addtonhl hose, chan saws, ratons, tow chans, tre chans, drnkng water contaners, ce chests, addtonal hand tools, and addtonal contalners of foam concentrate." 87

NFPA 1906 m F94 ROC Change 3-1.2 to read: "The equpped personnel weght shall be calculated at 250 lb (llg kg) per person multpled by the number of seatngpostons on the apparatus." Delete the current appendx to 3-1.2. COMMTTEE STATEMENT: The commttee s bascally acceptng the proposed change to nclude the equpped personnel weght and changng 3-1.2 to reflect that equpped personnel weght. n dong so the appendx to 3-1.2 s no longer applcable. t s also usng the term "mscellaneous and mnor equpment" wth reference to the allowances n Table 3-1.1 and addng an addtonal paragraph to A-3-1.1 to provde addtonal gudance to the purchaser. (Log #39) 1906-10- (3-1.2): Reject SUBMr~FERa Ted Rex, Bureau of Land Management, NFC at Bose, D RECOMMENDATON: Delete n total. SUBSTANTATON, Wldland agences requre personnel to carry "a maxmum of 55 bs of personal and protectve equpment. By changng the Standard to FULLY EQUPPED fre fghter, those departments that carry SCBA wll have the addtonal weght requrements already desgned nto the apparatus. No department wll have an under desgned apparatus. COMM'TEE STATEMENT: See commttee acton on publc comment 1906-9 (Log #37) whch modfes ths requrement. (Log #14) 1906-11 - (3-1.4): Accept SUBV TTER: Gary Handwerk, Hale Products RECOMMENDATON: Add to the end of sentence: "or off road use only". SUBSTANTATON: We can have off road only apparatus also. (Log #63) 1906-12 - (3-2.1.2): Accept n Prncple RECOMMENDATON: Automatc engne shutdown Some trucks come wth automatc hgh temperature shut down, do you want to take them off?. SUBSTANTATON: None. Add wordng to the end of the current sentence so the revsed sentence reads: "Automatc engne shutdown systems shall not be permtted unless they are an ntegral part of the standard engne management system." Add addtonal wordng to the appendx to read: "Some engnes come wth automatc engne shutdown systems as part of the engne management system although certan chasss are avalable wthout engne shutdown systems. The purchaser should try to use an engne wthout a shutdown system when possble." COMMTTEE STATEMENT: Whle the commttee feels that the safety of the fre fghter s mportant enough that engne shutdown systems should not be allowed and the engne should be sacrfced f necessary to allow the fre fghters to wthdraw to a safe area f the engne s falng, some engnes are only avalable wth an ntegrated engne shutdown system bult nto the engne management system. The modfcaton of such an engne management system by an apparatus bulder or a fre department can vod the warranty. (Log #2) 1906-13- (3-2.2.2): Reject SUBMTTER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: The last sentence talks about mountng "so they wll not accdentally open due to vbraton". Need to add a porton that ndcates that the dran valve wll be mounted n such a way to be protected from the ground, rocks or other elements that may cause breakage. SUBSTANTATON: Vbraton of dran openng s only a small part of the problem. t s essental ths dran be protected, partcularly f the vehcle s to be used off-road. COMMTrEE STATEMENT: Many dran valves are nstalled at the base of the radator. There does not seem to be a problem wth just dran valves beng damaged. Debrs that could damage a dran falve wll probably damage the radator as well. f the apparatus s to be usedunder condffons that could could cause such damage, vehcle protecton systems as defned n Chapter 13 should be consdered. (Log #95) 1906-14- (3-2.3.3): Reject SUBMTTEPa Rck sler, Washngton State Dept. of Natural Resources RECOMMENDATON: Delete entre secton. SUBSTANTATON: All ths nformaton s n the operators manual and s/should be part of the operators tranng. Addton of the data plates adds to the cost of the apparatus md s redundant. f the operator won't look at the manual he won't look at another data plate. COMMTTEE ACTON: Reect. COMMrTEE STATEMENT: Operator's manuals are often not wth the vehcle orget lost and the vehcle operator may need to replensh fluds n the feld. (Log #96) 1906-15 - (3-3.3.3): Accept n Prncple SUBMTTER: Rck sler, Washngton State Dept. of Natural Resources "lfa custom chasss s specfed, a master load dsconnect swtch shall be provded between the starter solenod(s) and the remander of the electrcal loads, wth the batteres connected drectly to the starter solenod(s). The alternator shall be wred drectly through the ammeter shunt(s), f one s provded, and shall not be wred through the master load dsconnect swtch. A green "battery on" plot lght that s vsble from the drvers poston shall be provded. -f a st,~ndard producton chasss s used,the system used shall be as provded bythb chasss manufacturer." SUBSTANTATON: We should not need to redesgn what ther engneers have already created. "ff t an't broke don't fx t". COMMT'EE ACTON: Accept n Prncple. Move 3-3.3.3 to the appendx as an appendx tem to 3-3.3 and revse to read: t s recommended that a master load dsconnect swtch be provded between the starter solenod(s) and the remander of the electrcal loads, wth the batteres connected drectly to the starter solenod(s). The alternator should be wred drectly to the batteres through the ammeter shunt(s), f one s Pdrovded, and should not be wred through the master load sconnect swtch. A green "battery on" plot lght that s vsble from the drver's poston should be provded and the purchaser may want to consder a second "battery on" plot lght on the outsde of the vehcle to warn that the batteres are on when the apparatus s parked n the fre staton. COMMTTEE STATEMENT: The s not a custom chasss vrs commercal chasss ssue but rather the need for ths electrcal arrangement to allow the chasss and apparatus wrng to be solated so small electrcal faults do not dran the battery when the apparatus s not runnng. However, the commttee s wllng to move ths to the appendx as a recommendaton rather than a requrement. (Log #3) 1906-16- (3-3.5.1): Reject SUBMTTER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: The Standard to nclude lghts and warnng devces s not necessary. The secton would be lvable fa comment were added, somethng to the effect of "f anthorzed or determned essental by the "Agency Havng Jursdcton"." SUBSTANTATON: Many wldland fre agences n the west do not have the need for the elaborate warnng devces n the standard. The majorty of use places the equpment off-road or n sparsely populafed areas. There s no need to mandate the use of warnng lghts as a standard. COMMTrEE ACTON: Reject. COMMTTEE STATEMENT: The commttee feels that any vehcle that s to respond on publc roads as an emergency vehcle should have warnng lghts. Warnng lghts are also necessary f the vehcle s to he useffalffng a publc rbadwhle fghtng fres. Ths s for the protecton of the vehcle and the frefghters. The standard does not requre warnng lghts on a vehcles whch does not respond as an emergency vehcle on publc rbads. 88

NFPA 1906 -- F94 ROC (Log #4) 1906-17- (5-3.5.4): Reject SUBMTTER: Jm Stumpf, ncdent Management Consultants COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATON: The Standard to nclude lghts and warnng devces s not necessary. The secton would be lvable ra comment were added, somethng to the effect of "f anthorzed or determned essental by the 'Agency HavngJursdcton'." SUBSTANTATON: Many wldland fre agences n the west do not have the need for the elaborate warnng devces n the standard. The majorty of use places the equpment off-road or n sparsely populated areas. There s no need to mandate the use of warnng lghts as a standard. COMMr][TEE ACTON: Reject. COMMTrEE STA~F.,NT: The commttee feels that any vehcle that s to respond on publc roads as an emergency vehcle should have audble warnng equpment. The standard does not requre audble warnng equpment on a vehcles that does not respond as an emergency vehcle on publc roads. (Log #5) 1906-18 - (3-3.5.6): Reject SUBMT'ER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: Add a second sentence to state: "Lghts shall be arranged or protected to mnmze acddental breakage." SUBSTANTATON: t s essental that any addton outsde of the body be protected from accdental breakage, to the best of our ablty, from lmbs, branches, etc. COMMYTEE ACTON: Reject. COMMTrEE STATEMENT: As a mnmum standard, the commttee does not feel das s necessary. A lot of wldand fre apparatus s operated n envronments where t s on the road and not subject to damage from trees and branches. The statement as proposed s also mpossble to measure. Chapter 13 provdes for protecton of the apparatus from brush f the purchaser feels such protecton s necessary. (Log #34) 1906-19 - (3-4.1.2): Reject SUBMTTER: Bran Hutchns, Mchgan Dept. Natural Resources RECOMMENDATON: Delete paragraph. SUBSTANTATON: Ant-lock brakes have not been shown to be a sgnfcant contrbutor to safety. t has been dffcult to fnd good off road cab and chasss. Often these have come from smaller manufacturers and are produced n lower volumes. Requrng components lke ant-lock further dscourages the development and sale of these vehcles. Many wldfre engnes are used seasonally. Generally, fre actvty takes place on dry days. Weather related need for ant-lock systems s vastly reduced. As a mnmum standard, ths should be left as a buyer opton. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-21 (Log #97) whch modfes the requrement. The commttee feels that f persons are properly traned to use ant-lock brakng systems, they can be a defnate safety enhancement. (Log #76) 1906-90 - (3-4.1.2): Reject [ SUBMTTER: Greg Proven, AM General Corporaton RECOMMENDATON: Delete wordng related to requrement for antlock brakes SUBSTANTATON: 1. The value ofantlock brakes n smaller vehcles has been called nto queston by recent accdent data that ndcated no apprecable reducton of accdent frequency or severty related for passenger cars. 9. Our vehcle chasss, the HUMMER, has been evaluated wth very postve results by the Roscommon Equpment Center under the auspcous of the Northeast Forest Fre Supervsors, and by the Natonal lnteragency Fre Center n Bose. The HUMMER s consdered on deal chasss by many wldland professonals but s not currently avalable wth antlock brakes. Ths clause excludes an exceptonal wldand fre fghtng tool for lack of a feature that s at estonable value for the applcaton. MMT'EE ACTON: Reject. COMMTrEE STATEMENT: See commttee acton on publc comment 1906-21 (Log#97) whch modfes the requrement. The commttee feels that f persons are properly ganed to use ant-lock brakng systems, they can be a defnate safety enhancement. (Log #97) 1906-91 - (3-4.1.2): Accept n Prncple SUBMTTER: Rck sler, Washngton State Dept. of Natural Resources RECOMMENDATON: Add the words: "...f avalable from the manufacturer." SUBSTANTATON: Ths agencydoes not use custom bult chasss/apparatus and as such s lmted to the offerngs of the chasss manufacturers. COMMTT~ACTON: Accept n Prncple. Add the text: "f such a system s avalable from the chasss manufacturer." COMMTT, E STATEMENT: The commttee feels that f persons are properly traned to use ant-lock brakng systems, they can be a defhte-safety enhancement. However, the-commttee does not want to lmt the use of certan chasss smply became they do not have ABS avalable. Therefore the commttee s requrng the purchaser utlze that opton f t s avalable from the chasss manufacturer. (Log #6) 1906-22 - (3-4.2.2): Reject SUBMTFER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: t seems confusng that an :ude clearance s lsted less than the ground clearance for the vehcle. Ground clearances appear adequate, the axle clearance does not. Suggest deleton of the axle housng clearance column and provde only the mnmum for ground clearance. SUBSTANTATON: As wrtten t appears that ground clearance really doesn't mean anyth.ng f you have another porton of the vehcle closer to the ground,.e., the axle clearance. COMMTTEE ACTON: Rejec~ COMMrlTEE STATEMENT: The commttee feels t needs to defne both axle housng and ground clearances to ensure mnmum clearances as an apparatus moves over uneven ground. A drver can maneuver an apparatus to avod damage to the axle homng but needs hgher ground clearance under the remander of the vehcle. Hgher ground dearances are not avalable on normal commercal chasss. Ths s a mnmum standard. f the purchaser needs hgher axle or ground clearances, he needs to work wth an apparatus manufacturer to fnd a chasss to meet hs needs. (Log #41) 1906-25 - (M.3.2): Accept nprndple 8UBMTrF, R: Ted Rex, Bureau of Land Management, NFC at Bose, D RECOMMENDATON: Amend to read: The transmsson shall allow the vehcle to functon and operate smoothly at 2.5 mph (4 kmph) FOR PTO DRVEN PUMPS ~. DESGNNG FOR SLOWER. SPEEDS SHOULD BE A PRORTY. SUBSTANTATON: Speed s too fast for normal pump and roll opemtous. Personnel workng on the ground cannot work at the ndcated speed. t s hghly desrable to have the apparatus capable of full performance at a walk. COMMT~ ACTON: Accept n Prncple. Revse the exstng text to lower the speedto 2 mph (3.2 kmph). COMMTrF~ STATEMENT: Pump and roll s covered n 5-15.and s beng modfed to a 2 mph speed. The smooth operaton at low speed ~ also needed when-t s necessary.to traverse rough terran. 1906-24 - (3-4.f.3): Accept n Prncple (Log #59) S U B ~ D.W. McKenze, Forest Servce-USDA "...wthn a fully enclosed area for the total..." SUB,$~ANTATON: None. COMMT'Eg ACTON: Accept n Prncple. Revse the text to read "...wthn a fullv enclosed area(s~ for the total..." CoMMr'rEE STAT~E~T: The commttee s ed~lorally addng (s) to the word area to allow for the use of non-contguous areas. 89

NFPA 1906 m F94 ROC (Log #29) 1906-25 - (3-4.6.4): Reject SUBMTTER: John M. Farrngton, Centervlle-Ostervlle-Marstons Mlls, MA Fre Dslrct COMMENT ON PROPOSAL NO: 1906-192 RECOMMENDATON: Do not comment on operatonal rdng ostons n document. ~ UBSTANTATON: ff subcommttee cannot accept the many recommendatons f'om Plymouth County Massachusetts agences on pump and roll operatons from turrets or cages - do not comment on ths method of operaton n the standard. COMMTTEE STATEMENT: The commttee could not understand what the commentor wants. Based on the reference to proposal 1906-192 and the comment, the commttee beleves the commentor s concerned wth language that was n an earler draft and removed as a result of publc proposals receved. (Log #7) 1906-26 - (3-4.6.6): Reject SUBMTTER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: The requrement that head heght at any seat shall be at least 37 n. s probably too low. Suggest addng 2-3 n. to the mnmum. SUBSTANTATON: Many fre fghters are requred by the "Agency Havng Jursdcton" to tde n the apparatus fully prepared for suppresson dutes. Ths ncludes protectve equpment (helmet) as specfed n NFPA 1977. COMMTTEE STATEMENT: Ths s a mnmum standard. The purchaser can specfy more head heght f t s needed n specfc apparatus. (Log #98) 1906-27- (3-4.6.8(k)): Accept n Prncple SUBMTTER: Rck sler, Washngton State Dept. of Natural Resources RECOMMENDATON: Delete: "(fa key s provded, t must be attached to the cab nteror.)" SUBSTANTATON: Agency apparatus s frequently used n close proxmty to nmate crews. Polcy does not allow for leavng the keys n a vehcle where t could be potentally used for escape. Delete the text from the requrements of the standard but add an appendx to. read'. "f an gnton key s requred to start the apparatus, t s recommended that the key be attached to the cab nteror to prevent ts accdental removal." COMMTrEE STATEMENT: The commttee s concerned that gnton keys not be removed from the apparatus, thus leavng the apparatus unusable at the tme of an emergency. However, t also realzes there are operatonal problems sometmes wth leavng a key n the apparatus and s addng a recommendaton n the appendx to cauton persons on ths ssue. (Log #91 ) 1906-29 - (4-3.2): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. RECOMMENDATON: Add an addtonal sentence after the frst sentence to read: The prmer pump shall not be used after the 5 mn. test perod has begun. SUBSTANTATON: We must mantan consstency wth secton 14-4. COMMT'EE ACTON: Accept n Prncple. Add a sentence as suggested but revse the sentence to read: "The pcump prmer shall not be used durng the 5 ran. perod." OMMTrEE STATEMENT: The commttee agrees to add a sentence but s revsng t to establsh a requrement whch can then be the bass of a test n 14-4. (Log #62) 1906-30 - (4-5.1.1): Accept SUBMT'ER: D.W. McKenze, Forest Servce-USDA RECOMMENDATON: 4-5.1.1 Add "natonal standard hose threads SUBSTANTATON: None. COMMT'EE ACTON: Accept. (Log #78) 1906-31 - (4-5.1.1): Accept n Prncple SUBMTTER: Jack Makn, Wajax-Pacfc Fre Equpment, nc. RECOMMENDATON: Revse text to nclude 2 n. NPSH as an acceptable sucton ntake thread. SUBSTANTATON: The Mark-3 and BB-4 pumpers manufactured by Wajax-Pacfc Fre Equpment, nc. are equpped wth a 2" NPSH male sucton port. We estmate over 3000 of these unts to be n servce bywldland agences across the country. 2" NPSH hose became a standard thread on ths sze pump. Adaptng to natonal standard would cause ncreased potental for sucton leaks and resultant equpment falure. COMMT'EE ACTON" Accept n Prncple. Add a second sentence to 4-5.1.1 to read: "ntakes of 2-n (51-mm) or less n sze shall be permtted to have NPSH thread." Also revse the thrd sentence of 4-6.2 to read: "Dscharge outlets 1 1/2-n. (38-mm) or less n sze shall be permtted to have NPSH thread." Change the defnton of dscharge outlet sze n 1-3 to read: "The nomnal sze of the frst fre hose thread from the pump avalable to the pump operator." Change the defnton of ntake connecton sze n 1-3 to read: "The nomnal sze of the frst fre hose thread from the pump avalable to the pump operator." COMMT]FEE STATEMENT: Because NPSH s used extensvely n the wldand fre suppresson servce, and where NPSH s a recognzed thread standard, the commttee s agreeable to allowng ths thread on the small sze ntakes and dscharges. Ths change also requres changng the defntons of dscharge outlet sze and ntake connecton sze to be more genetc. (Log #92) 1906-28 - (4-2): Reject SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. RECOMMENDATON: Change chart to read as follows: G.P.M. N" 20-70 1 1/2" 70-100 2" or 2 1/2" 100-175 2 1/2" 200-250 3" SUBSTANTATON: Snce ths s a performance standard and we are talkng about sucton hose sze by flow rate we should only state flow ranges wth varous szes of sucton hose e.g. 20-70 GPM wth 1 1/2" hose. COMMTTEE STATEMENT: The commttee has establshed the flow rates n table 4-2 (a) as ratng ponts for pumps on wldand fre apparatus so they need to be specfc ponts rather than ranges. See 4-1. (Log #79) 1906-32 - (4-5.1.1): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. COMMENT ON PROPOSAL NO: 1906-253 The ntakes specfed shall have male natonal standard threads. ("NH') Amercan natonal hose couplng threads ("NPSH") are an acceptable opton on two nch ("2") sucuon nlets when specfed. SUBSTANTATON: RE: Proposal 1906-78 (4-6.2) (Log#89) accept n prncpal same apples to sucton threads. Many federal wldand agences have standardzed on 2" NPSH male sucton threads on ther smaller portable/skd mounted pumpers. Adaptng to 2" NST s undesrable, costly, and cumbersome. An agency or deparmaent should be able to specfy 2" NPSH male sucton threads when desred. COMMTrEE ACTON: Accept n Prncple. COMMTTEE STATEMENT- See commttee acton on publc comment 1906-31 (Log #78) 90

NFPA 1906 ~ F94 ROC (Log #82) 1906-33 - (4-6.9): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. f the ap)p aratus s equp[p ed wth a43ooster reel, the r gn g pp ' d n between the pump and booster reel shall be mnmum of one normal sze larger than the hose to be carred on the reel and shall be equpped wth a shut offvalve of at least the normal sze of the hose tube carred on the reel. When total dstance between hose reel and pump s 6 feet or less, hgh pressure booster hose of the same normal sze s acceptable provded there are no sharp bends and f a full flow swveljo nt s Utlzed. SUBSTANT,,A,, "~ON: You are not addressng the restrcton n the swlveljont full flow swvel jonts have a 7/8" waterway. What good wll t do to pump 1-1/4" hose n to a reel carryng 1" booster hose f the water must pass through a 3/4" orfce n the swveljont.~ Revse 4-6.9 to read: "f the apparatus s equpped wth a booster reel, the ppng, valves and swvel between the pump and booster reel shall be nomnally the same sze or larger than the nomnal nsde dameter of the hose to be carred on the reel. A shut off valve shall be provded between the pump and the reel. Hgh pressure booster hose of the same nomnal sze shall be permtted to be used nplace of ppng." COMMTTEESTATEMENT: The commttee now feels that the normally shortdstances nvolved on wldland fre apparatus between the pump and the booster reel wll not adversely affect the, frcton loss f plumbng of the same nomnal sze as the hose s used. (Log #83) 1906-34- (5-3): Reject SUBMTrE~ Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. "Where there s a seoarate cab-dstnct from the sld-on, a green lght shall be..." " SUBSTANTATON: Snce ths standard addresses both engne drven apparatus and slp-ons ndependent of same, let's ensure ths green lght s only requred when the pump cannot be seen to be runnng by the operator/drver. COMMTTEE STATEMENT: See 5-1.1 whch states that 5-3 apples to auxlary engne drven pumps. Therefore the suggested wordng s not necessary. l COMMTrEE ACTON: Reject. COMMrTEE STATEMENT: The commttee s cormerned wth false shutdowns due to an mproperly operatng pressure swtch. t also beleves that f an operator gets a low ol pressure ndcaton (see 5-7.2), the extra tme may be needed to allow fre fghters to wthdraw to a safe locaton. An operator could nurse an engne along wth low ol pressure f requred. (Log #81) 1906-37- (5-4.2): Acceptn Prncple SUBMTTERa Mark A. Conron, Wajax-Padfc Fre ]Equpment, nc. "s actvated o/fly when the water pump s out of"or runnn~ out of" water." SUBSTANTATON: Pressure swtches are desgned to ground the gnton when dscharge pressure drop below 60 PS. Ths occurs when the pump s runnng out of water, NOT when the pump s out of water. Revse the end of the ser~tence to read: "...s actvated only when the water pump s runnng out of water." C O ~ STATEMENT: The commttee s addng the work ~runnng to the exstng text whch allows for what the commentor wants. 1906-38 - (5-4.2): Reject (Log #99) S U B ~ Rck sler, Washngton State Dept. o:t" Natural Resources RECO~ATON: Delete n ts entrety. S~~TON: f the p tmp does not shut down for low ol, t probably won t run much onl er wthout a major falure. f that happens t won't just be a cou,le of mnutes wthout water to add ol t wll be no more water at all. COMMTTEE STATEMENT: The commttee s corlcerned wth false shutdowns due to an mproperly operatng pressure swtch. t also beleves that f an operator gets a low ol pressure ndcaton (see 5-7.2), the extra tme may be needed to allow fre fghters to wthdraw to a safe locaton. An operator could nurse an engne along wth low ol pressure f requred. (Log #S2) 1906-35 - (5-4.2): Reject SUBMTTER: E. Mchael Baley, Wsconsn Dept. of Natural Resources RECOMMENDATON: To the wordng: An automotve engne shutdown system shall not be permtted, except for an automatc shutdown that s actvated only when the waterpump s out of water;, Add the wordlng~ or when engne s out of ol SUBSTANTATON: Most auxllary engnes have an automatc shutdown system to protect the engne when t runs too low on lubrcaton ol. t seems ludcrous to protect the water pump wth auto-shutdown, but to gnore protectng the unt whch drves the pump. Low ol shutdown systems should be allowed, too. COMMTTEE STATEMENT: The commttee s concerned wth false shutdowns due to an mproperly operatng pressure swtch. t also beleves that f an operator gets a low ol pressure ndcaton (see 5-7.2), the extra tme may be needed to allow fre fghters to wthdraw to a safe locaton. An operator could nurse an engne along wth low ol pressure f requred. (Log #89) 1906-39 - (5-5): Reject $UBMTTER: Mark A. Conron, Wajax-Pacfc Fre ]Equpment, nc. (a) "...and an ndependent governor ~ that lmts...recommended maxmum no - load speed" Delete Governed. (b) "An automatc speed controller s defned as ben~ that whch shall automatcally... v SU]gSTANTATON: (a) n desgnng aperformmlce standard what's mportant s to have a system that hmts the engne speed, at no load, to the engne manufacturer's recommended maxmum no load speed for the applcaton. All of ths s to ensure one does not break the crankshaft or burn the seals. f a swtch or anythng else does ths~ob t should be allowed. (b) Let s be clear that ths last sentence s defnng what a speed controller sl COMMTTEE STATEMENT; The commttee feels due exstng wordng adequately covers the ntent as a governor,:an be any devce that does the job, ncludng a swtch. 1906-36 - (54.2): Reject (Log#42) SUBMTTER: Ted Rex, Bureau of Land Management, NFC at Bose, D RECOMMENDATON: Amend to read: "...only when the water ~ ump s out of water OR LOW ENGNE OL PRESSURE OCCURS." UBSTANTATON: There s no safety dfference n auxlary engne shut down because of lack of water or low ol pressure. Falure to have low ol pressure shut down can result n extremely costly repars and the loss of the apparatus durng those repars. (Log #8) 1906-40 - (5-9): Accept n Prncple SUBMrFrER= Jm Stumpf, ncdent Management Consultants On desel engnes,...shall be provded wth an US)A Forest Servce approved sl~ark arrester. Ths requrement should also nclude gasolne drven engnes. SUBSTANTATON: Federal and several States have laws that requre a spark arrester for all nternal combuston engnes, regardless how they arepowered. The spark arrester s desgned to arrest sparks that cause fres n wldland condtons. 91

NFPA 1906 m F94 ROC COMMTrEE ACTON: Accept n Prncple. Delete the words: "On desel engnes" n the thrd sentence. COMMTYEE STATEMENT: By deletng the wordng, ths sentence wll apply to all engnes wth an exhaust system. COMMTTEE STATEMENT: The commttee feels that n a mnmum standard, a 1 n. lne s suffcent. However, t s wllng to suggest larger fll lnes n the appendx. (Log #58) 1906-41 - (5-13.2): Accept n Prncple RECOMMENDATON: Add "An auxlary pump shall use the same stypu~of fuel as de chasss engne." STANTATON: None. COMMT"EE ACTON: Accept n Prncple. Add an appendx to 5-13.2 whch reads: "t s recommended that the pump engne use the same type of fuel as the chasss engne." COMMYVrEE STATEMENT: n a mnmum standard, the commttee does not feel t can mandate das as many smaller pumps are drven by gasolne engnes and the cost to drve these pumps wth desel engnes s sgnfcantly greater. However, many of these pumps are used on desel drven apparatus. (Log #57) 1906-42 - (5-15): Accept n Prncple RECOMMENDATON: Revse as follows: "...pump can delver at least 20 gpm (76 L/mn) at 125 ps whle the apparatus s movng at 2 mph or less." SUBSTANTATON: None. COMMTFEE ACTON: Accept n Prncple. Revse the sentence to read as follows: "The vehcledrve engne and drve tran shall be arranged such that the pump can'delver at least 20 gpm (76 L/ran) at 100 ps (690 kpa) whle the apparatus s movng at 2 mph (3.2 kmph) or less." COMMTrEE STATEMENT: n reducng the speed from 4 mph to 2 mph, the commttee had to look at the ablty to generate hgh pump speeds necessary for elevated dscharge pressures. As a mnmum, the commttee feels that for pump and roll operatons, 100 ps s suffcent, as water s normally dscharged through a short hose lne wth reduced f'cton loss. (Log #84) 1906-43 - (6-3.1): Accept SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. "A convenent covered fll openng" (Delete Dmensons) "desgned to prevent sp'fllage." SUBSTANTATON: Snce we are to be buldng a performance standard we should not mpose desgn/sze requrements. What's mportant s that there be an openng to allow fllng of the tank n a tmely manner. COMMT?EE ACTON: Accept. (Log #56) 1906-44 - (6-3.4): Accept n Prncple SUBMTTER: D.W. McKenze, ForestServce-USDA RECOMMENDATON: Revse as follows: "A valved tank fll lne of the same sze as the pump outlet shall be ~ rovded." UBSTANTATON: Need bgger lne than 1 nch. COMMT"EE ACTON: Accept n Prncple. Leave the requrement as stated n the standard. Add an appendx to 6-3.4 to read: "Larger sze tank fll lnes may be desrable when usng larger sze pumps. They wll allow the tank to be reflled faster. The followng s suggested as a gude. Pump Sze 20-50 gpm (76-190 L/mn) 70 to 175 gpm (265-662 L/mn) 200 gpm (757 L/ran) or larger Tank Fll Lne Sze 1 n. (25 mm) 1 1/2 n. (38mm) 2 n. (51 mm) (Log #9) 1906-45 - (%6.2): Accept n Prncple SUBMTYER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: Add a sentence to provde the lattude for the "Agency Havng Jursdcton" to approve the use of a reflectve strpe. SUBSTANTATON: Many unts n the western Unted States do not have the need for such a requrement. n many applcatons t does nothng to mprove the safety of the equpment or fre fghter. Revse the frst sentence of %6.2 to read: "Each apparatus that responds on publc roads as an emergency vehcle shall have retlectve strpe(s) affxed to the permeter of the apparatus." COMMTrEE STATEMENT: The commttee feels that any a~pparatus that responds.. on p.ublc roads as an. emergency vehcle. should have the bastc hghts, stren, and strpng to desgnate t as an emergency vehcle and to provde for the safety of the fre fghters whether the vehcle s movng or parked along sde a publc way. The commttee's change allows the "agency havng jursdcton" to do what t desres f the apparatus s not to respond on publc roads. (Log #CC3) 1906-46 - (%6.2): Accept SUBMTTER: Techncal Commttee on Fre Department Apparatus RECOMMENDATON: Add to the end of the frst sentence the followng wordng: "Type ll, Class 1 or 3. SUBSTANTATON: The reference to ASTM D4956 s ncomplete wthout specfyng a type and class. (Log #80) 1906-47 - (%8.1): Accept n Prncple SUBMr['XR: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. The weght of a completed skd - mounted fre fghtng package, ncludng fuel, ol, and standard equpment normally carred, less water should be equpped wth lftng eyes or forklft slots to facltate ts possble movement by experenced/traned personnel. SUBSTANTATON: 1. t should be made very clear that the unt should be empty of water before lftng. 2. ff the owner does not ntend to lft slp-on n and out why must they have to have lftng eyes? When lftng eyes are used and the equpment s to be lfted let's ensure lablty s lmted by askng for personnel experenced n such actons. Delete 7-8.1and change the term "skd-mounted" n %8.3.3 to "slpon" COMMTrEE STATEMENT: The commttee now realzes that many slp-on unts are not regularly moved onto and off a chasss and therefore t s not necessary to have lftng eyes or fork-lft slots n a mnmum standard. The commttee s also changng the term "skd-mounted" to slp-on" n 7-8.3.3 for consstency n termnology wth the tde of the secton. (Log #10) 1906-48 - (7-8.3.3): Accept SUBMTTER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: Revse the second sentence to read: "...prevent movement of the unt durng rapd acceleraton, deceleraton or durng sde-hll operaton." SUBSTANTATON: Work on sde-hll partcularly n off-road use may be more cdtcal to the unts shft than durng startng or stop ~ng. CO~'V'EE ACTON: Accept. 92

NFPA 1906 -- F94 ROC ( Log #1 ) 1906-49- (8-2): Accept n Prncple SUBMTTER: Jm Stumpf, ncdent Management Consultants RECOMMENDATON: Are the weghts for the mnor equpment ncluded as part of the weghts outlned n 3-1.17 SUBSTANTATON: May make a dfference n the overall GVWR of the vehcle. COMMTTEE STATEMENT: The weght of equpment s n the equpment allowance weghts n table 3-1.1 and the commttee has changed the text n 3-1.1 to reflect "mscellaneous and mnor equpment." See commttee acton on publc propoka11906-9 (Log #37). (Log #85) 1906-50 - (Chapter 9 (New)): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. ', RECOMMENDATON: Much of what s wrtten s very desgn specfc. We should revst based upon our mandate to develop a efformance standard. ~ UBSTANTATON: We are to buld a performance standard. Let's ensure we endeavor to do ths. COMMTrEE ACTON: Accept n Prncple. COMMTrEE STATEMENT: Whle ths comment does not suggest any specfc changes, the commttee s attemptng to move n ths drecton. (Log #67) 1906-51 - (9-2 Expanson Rato (New)): Accept n Prncple SUBMTTER: Ron Rochna, Bose, D RECOMMENDATON: Add a new defnton of Expanson Rato as follows: The rat'o of the volume of the foam to the orgnal volume of the foam soluton. SUBSTANTATON: The defntons are not complete. Expanson Rato needs to be defned snce ts mentoned n the standard. All foam generators have some sort of expanson rato. COMMTrEE ACTON: Accept n Prncple. Take the defnton of "expanson" currently n A-9.2 and rename t "expanson rato" and move t to 10-2. Delete the defnton of "expanson" n A-10-2. COMMTTEE STATEMENT: The commttee feels the defnton currently n A-9-2 for expanson meets the needs and s movng t to Chapter 10 where the term s used. (Log #15) 1906-52 - (9-2 Proportoner): Reject SUBMTTER: Gary Handwerk, Hale Produzts RECOMMENDATON: Delete text as follows: Defnton of proportoner. SUBSTANTATON: Proportoner doesn't n~eed to be a ventur devce and sn't ths also the same as foam concentrate proportonng system. COMMTrEE ACTON: Reject. COMMTTEE STATEMENT: See commttee acdon on publc comment 1906-53 (Log #55). (Log #55) 1906-53 - (9-2 Proportoner): Accept n Prncple n Part RECOMMENDATON: Revse the defnton to read: Proportoner. A devce or method to add foam concentrate to the water stream to make foam soluton. There are two types of proportng systems (1) manually regulated proportonng systems and (2) automatc regulatng proportonng systems. SUBSTANTATON: Some proportoners do have and use a ventur devce but not all. COMMTrEEACTON: Accept n Prncple n Part. Revse the defnton as shown n the frst sentence of the commentor's suggeston except delete the word "stream". Do not nclude the second sentence. COMMTTEE STATEMENT: The second sentence s not part of the defnton, but rather explanatory materal on systems that use proportoners... The deleton of the word "stream" s to generalze the defmuon. (Log#54) 1906-54- (9-3): Accept n Prncple RECOMMENDATON: Need to add Manually regulated proportonng systems (1) Batch mxng (2) Sucton-sde (3) n-lne eductor (4) Bppass eductor (5) Around-the-Pump (6) Drect njecton Automatc regulatng proportonng systems (1) Balanced pressure, ventur proportonng system (2) Balanced pressure, pump system (3) Balanced pressure, bladder tank (4) Water-Motor proportonng system (5) Drect njecton, automatc regulatng proportonng system SUBSTANTATON: See enclosed "Proportoners for Use n WUdland Fre Applcaton" NOTE: Supportng materal s avalable for revew at NFPA Headquarters. COMM'VrEE ACTON: Accept n Prncple. Revse the ttle of 9-3.1 to Eductor System. Revse A-9-3.1 to read as follows: A-9-$.1 n-lne eductor foam proportonng systems are nstalled n the water pump dscharge as a permanently nstalled devce or as a portable devce. Water s forced through the eductor ventur by water pump dscharge pressure, creatng a vacuum causng foam concentrate to be drawn nto the eductor (nto the *rater stream) at the desgn rate of the devce. See Fgure A-9-5.1 (a). By desgn, a nonrecoverable pressure drop of 30 percent orgrea~er s requred for eductor operaton. The maxmum recoveredpressure ncludng frcton loss and statc head pressure s nomnally 65 percent of the nlet pressure to the eductor. Eductors are avalable wth fxed or varable rate foam soluton mx ratos. Water/foam \ dscharge ~ Pressure vacuum vent ~ Concentrate tank--% ~'~ Flush-out valve Tank shuteff 4 - h ~ Meterng valve 1 ~ E:ulcto r L~l~-dWate r ntake l ~- Fll tower J Water tank,,~ Dran [)ran ttan k shutoff 1 ' u 1 Foam concentrate Water F'~ure A-9-3.1 (a) n-lne eductor foam proportonng system. (a) A varable flow by-pass eductor system s a modfcaton of the n-lne eductor foam proportonng system. An eductor s placed n a by-pass lne around the man-lne water flow control valve so that when the valve s adjusted to produce water flow through the by-pass eductor, foam concentrate s drawn nto the educter (nto the water stream). See Fgure A-9-3.1 (b). The foam soluton n the by-pass lne s then joned wth the man-lne water flow drama stream of the 93

NFPA 1906 n F94 ROC water flow control valve. Proportonng s controlled by the use of a meterng valve n the foam concentrate lne together wth adjustments of the water flow control valve. Water/foam ~- Flush-out valve dscharge ~ water control valve / --~-...... ~" w Metedng valve W~j~. : ~te r ntake Water pu W " Pressure vacuum vent --~ ~--Fll tower Concentrate tank ~ "~ Water tank Tank shutoff ~ ~ Dran,1! t Dran Tank shutoff J Foam concentrate Water Fgure A-9-3.1(b) Varable flow by-pass eductor system. (b) Varable pressure eductors are a modfcaton of the n-lne eductor foam proportonng system. Ths type of eductor s desgned to automatcally adjust the area of the eductor ventur to compensate for changes n water pressure at the nlet of the devce. Add a new 9-3.2 to read as follows. 9-3.2 ntake-sde System. An ntake-sde foam proportonng system shall meet the requrements of Sectons 9-4, 9-5, 9-6, 9-7 and 9-10 as applcable. Add an appendx to the new 9-3.2 to read as follows. A-9-3.2 An ntake-sde foam proportonng system s a manually regulated system. An n-lne devce, nstalled n the water pump ntake or sucton, provdes a connecton through a foam concentrate meterng valve to the foam concentrate tank. Vacuum created by the water pump draws foam concentrate drectly nto the pump ntake. Hydrant or relay operaton s not possble wth ths type of foam proportonng system. Renumber 9-3.2 through 9-3.5 as 9-3.3 through 9-3.6. Renumber A-9-3.2 as A-9-3.3 and revse the text to read as follows. A-9-3.3 Around-the-pump proportonng systems operate wth an eductor nstalled betw-een-th-e water puml5 dscharge-and ntake. A small flow of water from the water pump ~tscharge passes through the eductor, whch creates a vacuuha cahsng foan c-oncentrate tb be drawn nto the eductor and dscharged nto the pump ntake. Around the pump foam proportonng systems wll nbt operate properly at a water pump nfake pressure greater than 10 ps (69 kpa). These systerrs pro-duce foffrn soluton at all water pump dscharge outlets whdn the system s operatng. - - A manual around-the-pump proportaonng system utlzes a manually adjustable foam concentrate meterng valve to control the mx rato. [SeeFgureA-9-3.3(a).] Renumber Fgure A-9-3.2(a) as A-9-3.3(a). A flow meter sensng around-the-pump proportonng system utlzes a flow meter sensng system to montor total soluton flow mad foam concentrate flow7 The flow data s transmtted to a mcroprocessor that controls the mx rato through a foam concentrate meterng valve. [ See Fgure A-9-3.3(b).] Renumber fgure A-9-3.2(b) as A-9-3.3(b). A conductvty sensng around-the-pump proportonng system utlzes electrcal conductvty meters to sense the foam s-oluton percentage and provde feedback from the control sample module. Data from the electrcal conductvty meters s transmtted to a mcroprocessor that controls the mx rato through a foam concentrate meterng valve. [ See Fgure A-9-3.3(c).] Renumber Fgure A-9-3.2(c) as A-9-3.3(c). Renumber A-9-3.3 as A-9-3.4 and revse the text to read as follows. A-9-3.4 Balanced pressure foam proportonng systems are nstalled on the dscharge sde of the water pump. Two orfces dscharge water and foarr concentrate nto a-common rato controller - (proportoner) located n the water pump dscharge. By adjustng the area of the orfces to a partcular ratfo, the percent of rejecton can be controlled f ntake pressures are equal. The method of controllng or balancng the foam concentrate pressure wth the water pressure vares wth dfferent balanced pressure system desgrs. The two basc types of balanced pressure systems are systems wthout a foam concentrate pump and systems wth a concentrate pump. Balanced pressure systems wthout a foam concentrate pump are referred to as "pressure proportonng systems." These systems utlze a pressure vessel wth an nternal bladder to contan the foam concentrate. When n operaton, water pump pressure s allowed to enter the pressure vesseland exert pressure on the nternal bladder. The foam concentrate s forced out of the bladder to the proportoner at a pressure equal to the water pump pressure. These systems are avalable wth fxed or varable rate proportonng. There are two basc types of balanced pressure foam proportonng systems whch utlze a foam concentrate pump. These systems can dscharge water and foam soluton smultaneously from the water pump dscharge outlets. The foam soluton mx rato s varable at each water pump dscharge outlet connected to the foam proportonng system. Ths system s capable of proportonng dfferent types of foam concentrate wben more than one foam concentrate storage tank s lnked to the foam concentrate pump va a selector valve system. Foam proportonng system operaton s not affected by water pump ntake pressure or nterrupted when refllng the foam concentrate tank. (a) A "by-pass system utlzes a daphragm valve n the foam concentrate pump-to-tank lne that automatcally balances the foam concentrate and water pressure by by-passng excess foam concentrate back to the tank. Renumber fgure A-9-3.3(a) as A-9-3.4(a). (b) A demand system s desgned to automatcally control the speed (RPM) of the foam concentrate pump to balance foam concentrate and water pressure wthn the system. Renumber fgures A-9-3.3(b), and A-9-3.3(c) as A-9-3.4(b), and A-9-3.4(c) respectvely. Renumber A-9-3.4 as A-9-3.5 and revse the text to read as follows. A-9-3.5 Drect njecton foam proportonng systems utlze a foam concentrate pump to nject foam concentrate drecdy nto the water pump dscharge. Water and foam soluton can be dscharged smultaneously from the water pump when ndvdual njecton ponts are provded for more then one water pump dscharge. Ths system s capable of proportonng dfferent types of foam concentrate when more than one foam concentrate storage tank s lnked to the foam concentrate pump va a selector valve system. The foam soluton mx rato can be fxed or varable dependng upon the system desgn. Foam proportonng system operaton s not affected by water pump ntake pressure or nterrupted when refllng the foam concentrate tank. Flow sensng drect r~cton foam proportonng systems utlze an n-lne flow meter(s) to montor the system operatng condtons. System operatng data s transmtted to a mcroprocessor, whch controls the mx rato. Two dfferent flow sensng systems are avalable. (a) A mcroprocessor receves electronc sgnals correspondng to the mx rato from the conwol panel and water flow data from the flow meter. The mcroprocessor then commands the foam concentratepump module to delver foam concentrate at the proportona[ rate_ [See ~gure A-9-3.5(a).] Renumber fgure A-9-3.4(a) as A-9-3.5 (a). (b) A mcroprocessor receves electronc sgnals correspondng to the foam concentrate flow from a foam concentrate flow-meter, the mx rato from the control panel, and water flow data from the water flow meter. The mcropro&ssor controls the mx rato through a foam concentrate meterng valve. [SeeFgureA-9-3.5(b).] Renumber fgure A-9-3.4(b) as A-9-3.f(b). A conductvty sensng drect njecton foam proportonng system utlzes an electrcal conductvty meter(s) to sense the mx rato at the water pump dscharge(s) and transmts ths nformaton to a mcroprocessor that controls the mx rato through an electromechancal foam concentrate meterng valve. Asecond electrcal conductvty meter provdes feedback from the control sample module to the mcroprocessor. Foam pump pressure s mantaned at a pressure hgher than water pump pressure to ensure njecton of the concentrate. Renumber fgure A-9-3.4(c) as A-9-3.5(c). Renumber A-9-3.5 as A-9-3.6 and Fgure A-9-3.5 as A-9-3.6. COMMT'EE STATEMENT: The commttee has added text to cover sucton-sde systems and by-pass eductor systems. Batch 94

NFPA 1906 -- F94 ROC mxng s not a system and as such s not covered n ths standard. The oth. er systems are already covered n the standard. (Log #30) 1906-55 - (9-3.5): Reject SUBMTTER: Robert Barraclough, Span nstruments RECOMMENDATON: Delete ths paragraph and the appendx tem. SUBSTANTATON: To my knowledge, ths method of proportonhag s not n current use on moble fre apparatus nor s ths type of proportoner avalable n the U.S. or Canada. Snce t s notf common usage and not avalable, we should delete any reference to t so a fre department doesn't spend a lot of tme lookng for a source of the unavalable equpment. COMMTTEE STATEMENT: These systems are avalable and should be covered n the standard. (Log #53) 1906-56 - (9-4.1): Accept n Prncple SUBMTTER= D.W. McKenze, Forest Servce-USDA RECOMMENDATON: Revse as follows: %.rangng from 0.1 percent to percent..." SUBSTANTATON: Need to go low on foam njecton. Revse 94.1 to read: ~'he proportonng system shall be capable of fprroportonng Class A foam concenwate(s) at a mx rate(s) selected om the range of 0.1 percent to 1 percent over the desgn range of flow and operatng pressures." COMMTTEE STATEMENT: The commttee s concerned that not all proportoners have the ablty to be adjusted but as rewrtten, the paragraph covers both fxed pont and adjustable rate proportoners. (Log #59) 1906-57- (94.3(c)): Accept RECOMMENDATON: Revse as follows: (c) Pressure drop across each ndvdual proportonng devce at the devce manufacturer's 25%, 50%, 75%, and 100% maxmum desgned flow rate. SUBSTANTATON: Need to know pressure loss at reduced flows. (Log #51) 1906-58 - (94.4): Accept n Prncple SUBMTTER: D.W. McKenze, ForestServce-USDA COMMENT ON PROPOSAL NO: 1906-933 RECOMMENDATON: Revse as follows: "...not exceed Sft/sec at the maxmum desgn flow rate." SUBSTANTATON: Change 25 ft/sec to 3 ft/sec_ 25 ft/sec s much to fast. COMMTrEE ACTON: Accept n Prncple. Delete 9-4.4. COMMTrEE STATEMENT: On revew, the commttee feels the paragraph s too desgn restrctve and the system's performance wll show whether the velocty s correct or not. (Log #16) 1906-59 - (9-4.5): Accept n Prncple SLBM'[q'ER: Gary Hhndwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-933 RECOMMENDATON: Change to 10 ft/sec. SUBSTANTATON: 6 ft/secs not needed and s too reslxctve. t s not needed for Class A foam, and s only needed for some brands of thck 3% and 6% Class B foam. COM]VTrEE ACTON: Accept n Prncple. Delete 94.5. COMMTTEE STATEMENT: On revew, the commttee feels the pafagrapl s too desgn restrctve and the system's performance wll shbw wlether the velocty s correct or not. (Log #50) 1906. 60 - (9-4.5): Accept n Prncple COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATON: Revse as follows: %. not exceed 1 1/9 ft/sec at maxmum desgn flow rate." SUBSTANTATON: 6 ft/sec s too fast. CoMMrFrEE ACTON: Accept n Prncple. Delete 9-4.5. COMMTrEE STATEMENT: On revew, the commttee feels the paragraph s too desgn restrctve and the system's performance wll show.whether the velocty s correct or not. (Log #17) 1906. 61 - (9-4.8): Accept n Prncple SUBMTTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1900-933 RECOMMENDATON: Add the words "or foam pump" after the words "return devce" n the second sentence. SUBSTANTATON: More correct dependng on ~/pe of system pcurchased. OMMTrEE ACTON: Accept n Prncple. Delete the last sentence. COMMTYEE STATEMENT: The orgnal ntent ~as to be able to see foam movng but the commttee now realzes these lnes may not always be vsble. As ths s a mnmum requrement, a purchaser can specfy a clear materal flts desred. (Log ~49) 1906. 62 - (94.8): Accept n Prncple SUBMTTER= D.W. McKenze, Forest Servce-USDA RECOMMENDATON: Revse as follows: "...between the return devce and..." SUBSTANTATON: Take out "non-". Should not be n. GOMMTrEE ACTON: Accept n Prncple. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-61 (Log #17) whch deletes ths senl:ence. (Log #18) 1906-63 - (9-4.9): Accept SUBMT'rER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATON: Change "back-flow" to "non-return" n second sentence. SUBSTANTATON: Keep wordng consstent. CO MT'EE ACTON: Accept. (Log #19) 1906-64 - (9-6.3): Accept SUBMTTE~ Gary Handwerk, Hale Products RECOMMENDATON: Delete word "master" from frst sentence. SUBSTANTATON: Not needed, all gauges should apply. COMMTrEE ACTON: Accept. (Log #20) 1900-65 - (9-6.4): Accept n Prncple SUBMTTER= Gary Handwerk, Hale Products RECOMMENDATON: Delete word "aunospherc". SUBSTANTATON: All tanks need (shall have) level ndcators. Ths s an all or nothng queston. Ether the opera~tor needs to know or notl Delete 9-6.4. COMMr[TEE STATEMENT: Not all tanks are capable of havng a concentrate level ndcator. As ths s a mnmum s3~andard, the commttee has decded to leave the requrement for a level ndcator hs an opton on any foam tank. 95

' NFPA 1906 -- F94 ROC (Log #CC1) 1906-66 - (9-7.3): Accept SUBMTTER: Techncal Commttee on Fre Department Apparatus RECOMMENDATON: Revse 9-7.3 to read as follows: "An expanson compartment shall be provded on the foam concentrate tank that s of suffcent volume to allow expanson and contracton of the foam concentrate caused by changes n ambent temperature. The surface area of the expanson compartment shall not exceed 1 percent of the surface area of the foam concentrate tank." SUBSTANTATON: The commttee has been revsng some of the atmospherc foam tank requrements and ths change wll brqg NFPA 1906 n lne wth wordng adopted for NFPA 1922. (Log #GG2) 1906-67- (9-7.11): Accept SUBMTTETa Techncal Commttee on Fre Department Apparatus RECOMMENDATON: Revse 9-7.11 to read as follows: "The foam concentrate tank outlet connecton shall be desgned or located to prevent aeraton of the foam concentrate and shall allow wthdrawal of 95 percent of the foam concentrate tank storage capacty under all operatng condtons." SUBSTANTATON: The commttee has been revsng some of the atmospherc foam tank requrements and ths change wll brng NFPA 1906 n lne wth wordng adopted for NFPA 1922. (Log #77) 1906- f8 - (9-9): Accept n Prncple SUBMTTER: John Grndley, Robwen RECOMMENDATON: 9.9 Pressure vessel foam concentrate or foam soluton tanks. The Flow-Mx bladder tanks do not hold foam concentrate or foam soluton. n our system, foam concentrate s contaned n a bladder that s located nsde the bladder tank. The bladder tank tself s flled wth water that apples pressure to the foam bladder. Therefore, the Flow-Mx bladder tanks should not be consdered under ths secton. These bladder tanks are not closed pressure vessels, but are open to the manfold system ~xt all tmes when n operaton. The pressure n the tank vares proportonally to the pump pressure. f ths secton apples to bladder tanks, t should also apply to the entre manfold system n every fre apparatus. 9.9.1 Flow-Mx bladder tanks meet the requrements of ASME boler and pressure vessel code Secton V Dv.. 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 ncorporates a 1/2" vent 9.9.5 Good dea 9.9.6 O.K. SUBSTANTATON: None. COMMTTEE ACTON: Accept n Prnc~,le. Revse the frst sentence of 9-9.1 to read: f the tank s charged wth a compressed gas, the tank shall be of welded constructon and desgned, fabrcated, and stamped n accordance wth the requrements of the ASME Boler and Pressure Vessel Code, Secton V, Dvson 1, for the requred pressure." Make the second sentence of 9-9.1 a new paragraph 9-9.2 and renumbor 9-9.2 through 9-9.6 as 9-9.3 through 9-9.7. The new 9-9.2 reads: "All pressure tanks and assocated ppng shall be desgned to a mnmum of 1 1/2 tmes maxmum workngj~ressure and shall be tested to the desgn pressure after nstallaton. Revse 9-9.5 (renumbered as 9-9.6) to read: "f the tank s charged wth a compressed gas, an approved ASME relef valve, properly set, shall be furnshed on the tank to prevent tank pressure fron exceedng 110 percent of the maxmum allowable workng pressure." COMMTTEE STATEMENT: The ASME Boler and Pressure Vessel Code does not apply to lqud flled or lqud cushoned wth ar flled tanks. However, these lqud flled tanks are stll beng covered by what was the second sentence of 9-9.1. Ths sentence s beng moved to ts own paragraph to ensure t s not confused wth the ASME requrement. The word "maxmum" was also added before the term workng pressure" for clarfcaton. The commttee has modfed 9-9.1 and 9-9.5 to requre the tank meet the ASME standard when t s charged wth ar and that a relef valve be provded when the tank s charged wth ar. (Log #86) 1906-69 - (9-9.3): Reject SUBMTTER: Mark A. Gonron, Wajax-Padfc Fre Equpment, nc. "The fll openng shall ~ nsde dameter so as to be able to oucklv refll. " gubstantaton: Let's stay away from desgn spec. and concentrate on developng aj)erformance standard. COMMTrEE ACTON: Reecu COMMTTEE STATEMENT: The suggested wordng does not state a measurable requrement. (Log #66) 1906-70 - (Chapter 10): Accept n Prncple SUBMTTER: RonaldJ. George, SFS COMMENT ON PROPOSAL NO: 1906-23~ RECOMMENDATON: The complete chapter 10 should be revsed to nclude data on a specally desgned hose assembly and marked to be used only to transport compressed ar/foam concentrates. SUBSTANTATON: At present standard fre hose and couplngs are desgned for water use, not ar per NFPA 1961 and 1962. Ar reacts more volently n hose than water. ndustry already has specal ar hoses desgned for safe use. Actual feld use has shown that the hose s destroyed after very lttle use when used wth a compressed ar foam system where mxng s accomplshed n the hose. Feld tests have also shown rapd wear of the outer jacket of standard fre hose due to turbulence n the hose caused by ar mxng wth water and foam concentrate. Add an appendx tem n the standard for 8-2(0 whch states "f the hose s ntended to be used wth a compressed ar foam system (CAFS), the user should check wth the manufacturer of the hose to ensure the hose has been approved for use wth CAFS." COMMTrEE STATEMENT: Ths s a hose and hose use ssue whch s beyond the scope of ths standard. The commttee s addng appendces to the three places where fre hose s mentoned to warn persons to check wth the hose manufacturer f the hose s to be used wth CAFS. (See also the commttee acton on publc comment 1906-85 (Log #88). n addton, ths commttee wll make the NFPA Fre Servce Occupatonal Safety and Health Commttee and the NFPA Fre Hose Commttee aware of the concerns and suggests the commentor work wth these commttees as well. (Log #100) 1906-71 - (Chapter 10): Reject SUBMTTER: Susan M. Young, Fre Equpment Manufacturers' Aasn., nc. COMMENT ON PROPOSAL NO: RECOMMENDATON: Rewrte Chapter 10, Compressed Ar Foam Systems, to ncorporaton safety requrements and gudance on the use of hose on CAFS Systems that s sutable for such applcatons. SUBSTANTATON: Chapter 10 fals to address performance and safety consderatons for an ntegral part ofa CAFS System -- the means to apply the foam, whch s generally accomplshed by means of a hose. However, Chapter 10 does not contan any reference to or gudance on the use of hose that s sutable to carry an ar/foam mxture under pressure. Such gudance s of crtcal safety mportance. Standard commercal fre hose carred on apparatus s not desgned to transport ar and may react volently under such use condtons. Though unntended, ts use on a compressed ar foam system s possble and can be dangerous, such msuse may cause a hose or couplng falure producng property damage, bodly njury, or death. Research done on ths ssue ndcates there are sgnfcant hazards for the Commttee to consder. FEMA urges the Commttee to study ths ssue and provde the necessary gudance on tle use of hose that s sutable and safe for use on a CAFS System. Ata mnmum, the standard should state that: No hose shall be used on a CAFS System unless such use s recommended by the manufacturer of the system and the hose manufacturer, and the hose s so marked for such use n a conspcuous manner. FEMA also urges the followng be ncluded n Chapter 10: WARNNG Standard commercal fre hose carred on apparatus s not desgned to transport ar and may react volendy under such use condtons. ts use on a compressed ar/foam system can be dangerous and may cause a hose or couplng falure, producng property damage, bodly njury, or death. Always follow the manufacturers' recommendatons and nstructons on proper use and mantenance. 96

NFPA 1906 -- F94 ROC COMMT'EE ACTON: Reject. COMMTTEE STATEMENT: Ths s a hose and hose use ssue whch s beyond the scope of ths standard. However, see commttee acton on publc comment 1906-70 (Log #66) and publc comment 1906-85 (Log #88) whch adds appendx materal to the three places where hose s mentoned n connecton wth or possble use wth CAFS. (Log #75) 1906-72 - (Chapter 10): Reject SUBMTrER: Joseph R. Poor, Natonal Fre Hose Corp. COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATON: Chapter 10 should be revsed to spedfy:. 1 ) Desgn and performance crtera of the dscharge hose lne assembly 2) Pressure relef on the dscharge sde of the system SUBSTANTATON: 1. At present CAbS users wll connect whatever s convenent as a dscharge hose lne assembly. Ths s usually fre hose. Fre hose has been rendered unft for use after as short as 4 weeks CAF~ servce. The nature of the prematurely sborten servce lfe ncludes: a. Corroson of the couplng b. Corroson of the expanson rng. c. Falure of the hose lner at the couplng nterface d. Excessve wear of the exteror of the hose (presumably from vbraton of the hose assembly cause by turbulence created n the hose durng mxng). Fre hose s desgned for water servce not ar. Snce ar s compressble (water s not), the reactve forces of ar are more extreme than water n hose. Ths should be taken nto consderaton when specfyng desgn and performance crtera for dscharge hose lne assembles used wth CAFS. 2. The standard as wrtten, contans no provson for pressure relef on the dscharge of the CAFS. Snce ar can react more volently than water n a hose lne, pressure relef should be provded to protect the fre fghter. COMMTFEE ACTON: Reject. COMMTTEE STATEMENT: Ths s a hose and hose use ssue whch s beyond the scope of ths standard. However, see commttee acton on publc comment 1906-70 (Log #66) and publc comment 1906-85 (Log #88) whch adds appendx materal to the three places where hose s mentoned n connecton wth or possble use wth CAFS. (Log#102) 1906-73 - (10-3.3): Accept n Prncple SUBMTTER: Bran Cable, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATON: Revse the paragraph to not requre a two to one rato between the pump capablty and the compressor ~CaL~asb lty. TANTATON: The paragraph puts an unnecessary requrement on the owner of a CAFS - that hs system have a pump that s szed twce the ratng of the ar compressor. Pump only unts already set a mnmum sze. Feld testng as well as NFPA testng has shown that extngushng capabltes of the CAFS ncreases wth ncreases n ar rato. The requrement for hgher water flow capabltes was based on the assumpton that the operator needed hgher flow rates n the event the CAFS faled. NFPA specfcatons do not desga falsafe crtera nto other equpment spedfcatons. The water flow rates for the pumps that exst n the present specfcaton should stand as a mnmum performance requrement. Revse 10-3.3 to read as follows: "The water pump supplyng the CAFS shall have a ratng n gallons per mnute at 100 psg (689 kpag) of at least the ratng of the ar source n SCFM (e.g. 125 gpm pump and a 125 SCFM compressor)." Revse A-10-3.3 to read as follows: "t s recommended that the apparatus have the ncapablty of supplyng 2 gpm (7.6 lpm) bf water per 1 SCFM (0.028 m ) of ar producton to provde fre-fghtng capablty usng both water and compressed ar foam smultaneously. COMMTrEE STATEMENT: The commttee agrees that n a mnmum standard, the 2 to 1 rato s probably not necessary but the commttee wants to keep the concept as a recommendaton so t s changng the appendx to reflect that recommendaton. (Log #101) 1906-74 - (10-3.4): Accept SUBMrlWER: Bran Cable, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATON: Delete the paragraph. SUBSTANTATON: The paragraph s desgn restrctve and does not establsh a mnmum requrement. Testng has :~hown that a wde range of ar expanson rato s not a mnmum :acceptable performance for wldland fre fghtng applcaton. A few specfc ratos would be adequate,.e. 8:1 and 20:1. (Log #48) 1906-75 - (10-3,6 (New)): Accept n Prndple SUBMTFER: D.W. McKenze, Forest Servce-USDA RECOMMENDATON: Add new secton to read: 10-3.6 CAFS of 50 efm and over water pressure shall automatcally control ar pressure and be equal to ar pressure. SUBSTANTATON: Ths results n a better operatng unt. COMMTrEEACTON: Acceptn Prndple. Add a new 10-3.6 to read: " On balanced pressure CAFS of 50 efm and over, the water pump dscharge pressure shall automatcally regulate the ar pressure to balance the ar and water pressures. COMMTrEE STATEMENT: The commttee s acceptng the concept and edtorally revsng the text for clarfcaton. (Log #68) 1906-76 - (10-6, A-10-6.5 (New)): Reject SUBMTFER: Ron Rochna, Bose, D RECOMMENDATON: Add new sectons to read: 10-6.5 "All dscharge plumbng wll have separate ar and water regulatng valves ahead of the man dscharge shut-off valve that are to flow CAFS foam. A-10-6.5 t s desrable to have the ablty to set ar and soluton flow rates separately at each dscharge outlet. Ths ]permts the operator to preset or change the foam type wthout affectng the flow rates or performance of other dscharge streams. Ths permts the operator of a montor to readly change the type of foam at wll. t also permts the apparatus to use any and all fre stream applances as well as foam generators. SUKSTANTATON: The desred desgn ofa CAF2,g engne s to have t be able to pump the desred foam n the same tme t takes to pump water. t should be not more complcated to operate than a standard engne, that s, f properly desgned, operatng the CAFS should be very smlar, f not dentcal to operatng a water only engne. t must have the ablty to pump just foam t;oluton to run low energy foam generators as well as CA~ foam smultaneously. n order to do ths t requres that ar and soluton control valves be at each outlet that ntend to permt CAFS foam dscharge--ths ncludes the montor. COMMTTEE STATEMENT: Ths s beyond a requrement for a mnmum standard. The purchaser can specfy addtonal regulatng valves f they want them. (Log #'21) 1006-77 - (10-6.3): Accept n Prncple S U B ~ Gary Handwerk, Hale Products RECOMMENDATON: Delete "The valve shall be of the quarterturn to open or close type". SUBSTANTATON: Desgn restrctve, why, also 1/4 turn valve actuator s not as safe as a worm drve control. Delete the entre paragraph 10-6,3. COMMTTA~ STATEMENT: n revewng ths paragraph, the commttee now feels the whole Earagraph s desgr~ restrctve. f the valvng s not proper, the unt wll not meet the performance test requrements. 97

NFPA 1906 m F94 ROC (Log #90) 1906-78 - (10-6.3): Reject SUBMTTER: Mark A. Conron, Wajax-Padfc Fre Equpment, nc. "...to foam soluton proportoner should be szed to allow fuu flow at the dscharge aperture k~enn~ n mnd szn~ chan~s can create dramatc velocw changes and fo~rn mx oroblevns. - SUBSTANTATON: Szng up n plpn~,/valve szes after ar to foam soluton can potentaly cause vbraton. Ths should be noted. COMMT EE ACTON: REject. COMMTrEE STATEMENT: See commttee acton on p.ublc comment 1906-77 (Log #21) whch deletes ths paragraph. (Log #47) 1906-83 - (14-5(c)): Reject SUBMr''ERa D.W. McKenze, ForestServce-USDA RECOMMENDATON: Revse as follows: (c) The tankfll lne shall be dosed, o SUBSTANTATON: Delete "and by-pass coolng lne" because the coolng lne should not have a valve n t. COMMT[EE AGTON: Reject. COMMT~E STATEMENT: The by-pass coolng lne should be closed to get an accurate readng. f the coolng lne does not have a valve n t, t can be dsconnected and plugged for ths test. ( Log #103) 1906-79 - (10-8.5): Accept SUBMTTER: Bran CaBle, Elkhart Brass COMMENT ON PROPOSAL NO: RECOMMENDATON: Delete paragraph 10-8.5. SUBSTANTATON: The paragrapt s ~les~n restrctve and does not establsh a mnmum requrement. Exstang systems wth ths feature do not ad the operator by provdng step sequencng dsplay and the addton of system overrdefeatures do not establsh a mnmum performance crtera. (Log #74) 1906-80 - (12-1): Accept n Prncple SUBMTTER: Matthew Daschel, Warn ndustres, nc. RECOMMENDATON: Revse 12-1 to read as follows: "General. f a wnch s nstalled on the apparatus, t shall meet the requrements of ths Chapter and of the Socety of Automotve Enngqn E)'neers (5 SAE StandardJT06." SUBSTANTATON: The SAEJ706 standard s used as the wnch rformance standard for U.S. commercal wnch manufacturers. s standards s accepted as ndustry practce n the towngand recovery ndustry and should also be adopted by the NFPA for emergency vehcles whch are used n smlar stuatons as towng and recovery vehcles. COMlVflT'EE ACTON: Accept n Prncple. Revse 12-1 to read as follows: "General. ra wnch s nstalled on the apparatus, t shall meet the requrements of das chapter and SAEJ706;~atng of Wnches." ANd "SAE]706-1985, Rttng Of Wnches" to 15-1.7. COMMT'EE STATEMENT: -The commttee s acceptng the addton of a reference to SAE J706 and has edtorally changed the submtted text for consstency wth the standard. (Log #73) 1906-81 - (12-3.1.1): Accept SUBMTTERa Matthew Daschel, Warn ndustres, nc. RECOMMENDATON: Revse 12-3.1.1 to read as follows: "Control of the electrc motor shall be by means of a handheld swtch wth forward, neutral and reverse postons. The swtch shall be located at the end of a mnmum 25 ft (7.6 m) electrcal cord that plugs nto a receptacle near the wnch locaton. Alternately, the swtch may be located on a handheld transmtter of a Federal Communcatons Commsson approved rado frequency wnch control devce." SUBSTANTATON: t s common to fnd rado flequency devces used to control wnches and hosts on moble equpment.typcally, use of a rado frequency devce s requred when ahazardous stuaton does not allow the operator to be wthn 25 ft. of the wnch but stll n vsual range of t. (Log #43) 1906-82 - (12-3.3.1): Accept SUBMTTER: Davd B. Harrson, New Jersey Forest Fre Servce COMMENT ON PROPOSAL NO: 1006-233 RECOMMENDATON: Revse as follows: "A mnmum ofa ~ cold crankng amp (CCA) battery subst em..." TANTATON: Based on mnmum battery capacty stated n paragraph 3-3.3.4 of 850 CCA, a dual battery system of ths sze woul~l equal 1,700 CCA~ Therefore, mnmum CCA for battery system should be reduced to 1,700. COMMTrEE ACTON: Accept. (Log #46) 1906-84 - (14-8): Reject RECOMMENDATON: Revse as follows: "...foam concentrate wthn + 15% percent at.5 concentraton from 10% to 100% of manufacturer's stated range of water flow and pressure." SUBSXANTATON: None. COMMTT.E ACTON: Reject. COMMTTEE STATEMENT: Gven the current technology beng used, 25 percent appears to be the best that can be expected from the general ndustry as a mnmum. Some manufacturers are able to acheve a better accuracy and a purchaser can ask for more accuracy f they desre. Also the commttee does not see any need to lmt the lower end of the range requrement as the manufacturer establshes that range and the requrement s that the equpment be accurate over that stated range. (Log #88) 1906-85 - (14-9.1.2, 14-9.2): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. RECOMMENDATON: n 14-9.1.2 and 14.9.2 place the followng dsclamer at the bottom of each paragraph. "Please ensure Hose OEM has approved the ntended fre hose for use wth CAFS systems." SUBSTANTATON: Hose OEM's are becomng ncreasngly concerned that compressed ar n hoses s dangerous and unsafe. To that end, we should publsh a dsclamer that any hose be approved for use wth compressed ar foam systems by the Hose OEM. Ths would mpact 14-9.1.2 and 14.9.2. Add an appendx tem n the standard for 14-9.1.2 and 14-9.2 whch states "The person conductng the test should check wth the manufacturer of the hose beng used to ensure the hose has been nsmmtrroved for use wth Compressed Ar Foam Systems." EE STATEMENT: The commttee s aware of the problems some people are havng wth fre hose used wth CAFS systems and feels that where ths s an apparatus standard and not a hose standard, t s best handled by an appendx tem advsng the person conductng the test to check wth the hose manufacturer as to whether the hose can be used for CAFS applcatons. (Log #22) 1906-86 - (14-9.2): Accept n Prncple SUBMTTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906-235 RECOMMENDATON: At the end of 5th sentence, after "wthout operator nterventon" acd "wth water tank at 1/4 level" SUBSTANTATON: Makes test more realstc, ths s what wll happen n the feld. COMMT[EF-ACTON: Acceptn Prndple. Revse the ffth sentence to read: "Wth the water tank at the one quarter full level, the valve at the dscharge end of the hose shall be shut and the engne(s) speed shall be mantaned for a perod of 15 ran wthout dschargng water, ar, or foam soluton from the unt and wthout operator nterventon." COMMTTEE STATEMENT: The commttee s addng the suggeston at the begnnng of the sentence rather than the end as t makes more sense sequentally there. They are also addng the word "full" to clarfy what the one quarter referred to, full or empty. 98

NFPA 1906 -- F94 ROC (Log #87) 1906-87- (14-11): Accept n Prncple SUBMTTER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. "The Contractor shall supply, at the tme of delvery," f annlcable at least..." SUBSTANTATON: f loose equ'p'ment-less actual rolng stocks suppled, then t's not possble to provde weght documents such as n 14-11 (e). Add text to the end of 14-11 (e) whch reads: "except when a slp-on unt s suppled wthout a chasss." COMM'TEE STATEMENT: The commttee feels the only excepton s the slp-on unt suppled wthout a chasss and s therefore addressng that drectly. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-90 (Log #12). (Log #23) 1906-92 - (Fgure A-9-3.2(a), (b), (c), A-9-3.3(a), (b), (c), A-3-4 (a), (b), (c), A-3.5): Reject SUBMTrER: Gary Handwerk, Hale Products Symbol for check valve s not correct, use standard hydraulc symbols (Log #38) 1906-88 - (A-3-1.1): Accept SUBMTTER: Ted Rex, Bureau of Land Management, NFC at Bose, D,~' RECOMMENDATON: Amend porton of frst sentence to read...the apparatus desgned hose load; THE EQUPPED PERSONNEL WEGHT;... SUBSTANTATON: Allows ths statement to conform to changes proposed to 3-1.1. COMMT'EE ACTON: Accept. (Log #40) 1906-89 - (A-3-1.2): Reject SUBMTTER: Ted Rex, Bureau of Land Management, NFC at Bose, D RECOMMENDATON: Amend to read: A WEGHT OF 250 LB (114 KG) FOR A FULLY EQU PPED FRE FGHTER S THE NFPA STANDARD AND WLL BE UTLZED. SUBSTANTATON: Ths provdes for a unform standard for the manufacturers to utlze n desgnng wldland apparatus. COMMT'EE STATEMENT: Ths appendx tem has been deleted by acton on publc comment 1906-9 (Log #37). ( Log #12) 1906-90- (A-4-4.4): Accept n Prncple SUBMTTER: Jm Stumpf, ncdent Management Consultant~ RECOMMENDATON: Add.the pumpng of retardants, wet water or other suppressants to the reason for havng bronze parts of the ~U'~'TANTATON: t s more common for wldland tre fghters to pump retardants or other suppressants than t s to pump salt water. COMMTrEE ACTON: Accept n Prncple. Revse the frst paragraph of A-4-4.4 to read: ~Pumps and ppng frequendy requred to pump salt water, water wth addtves, or other corrosve waters should be bult of bronze or other corroson resstant materals. For occasonal pumpng of such water, pumps bult of other materals are satsfactory f properly flushed out wth fresh water after such use. ~ COMMTFEE STATEMENT: The commttee s revsng the text to nclude the general concept that "water wth addtves ~ needs to be consdered when decdng on pump materals. t s also recognzng there may by other corroson resstant materals that could be used for pump constructon under these condtons. (Log #93) 1906-91 - (A-4-4.4): Accept n Prncple SUBMTrER: Mark A. Conron, Wajax-Pacfc Fre Equpment, nc. "Should be bronze" or of a materal st~ecfcallv destmed/ntended v for salt water usage. SUBSTANTAT~ON: Allowng bronze only s a desgn spec and precludes the use of new materal that may exst or be found that meets the performance standard of beng acceptable for use n a salt water envronment. COMMTrEE ACTON: Accept n Prncple. SUBSTANTATON: Correcton of symbol. COMMT'EE ACTON: Reject. COMMTrEE STATEMENT: The symbol used s a water system symbol and s also correct. (Log #24) 1906-93 - (A-9-3.2(c) (New)): Reject SUBMT'ER: Gary Handwerk, Hale Products RECOMMENDATON: Add text as follows: "(c) foam soluton contamnates total pump, very lkely wll also get nto water tank." SUBSTANTATON: Short comng, whch needs dentfyng. COMMTrEE ACTON: Reject. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-54 (Log #54) whch deletes the spedfc lsts of advantages and lmtatons for each system. (Log #69) 1906-94 - (A-9-3.3): Accept SUBMTFFA~ Ron Rodma, Bose, D " RECOMMENDATON: Delete the last two sentences n pmagraph 3: (Accurate foam proportonng s avalable over a wde range of flow and pressure. The foam concentrate pump can be used to refll the foam concentrate tank at any tme, even when the ~]stem s operatng.) NOTE: f the frst sentence s used then add t to the descrpton of the bladder system mentoned pror. Delete the lst of advan. ~es. Wthout a.lst of the dsadvantages of the s~tem we are nusleadng the fre serwce mark.~. SUBSTANTATON: Thrd paragraph, last sentence: The foam concentrate pump can be used to refll the foam concentrate tank at any tme, even when the system s operatng. don't thnk ths s what was tryng to be sad? should say: The foam concentrate tank can be reflled when the concentrate pump s runnng wth nterruptng foam generaton. don't feel t s approprate to draw a comparson to other devces by lstng the lmtaton of other automatc proportonng system. What are the lmtatons of ths system? The advantages are lstedl COMMaWEE ACTON: Accept. COMMT'EE STATEMENT: See commttee acton on publc comment 1906-54 (Log #54) whch deletes the spedfc lsts of advantages and lmtatons for each system. (Log #70) 1906-95 - (A-9-3.3): Reject SUBMTTER: Ron Rochna, Bose, D RECOMMENDATON: Suggested wordng for the standard: (d) Unt cannot be recharged when the system s n operaton. Unt cannot be recharged when the system s n 9peraton unless two vressure vessels are us~l. "Why s ths the only system that has a lst of lmtatons wrtten about t? Where s the lst of the advantages? suggest removng all lsts that lst the postve and negatve features of the automatc systems. SUBSTANTATON: Second paragraph, last sentence reads: "Pressure proportonng systems have the followng lmtatons:". 99

NFPA 1906 m F94 ROC Statement (d) whch states "Unt cannot be recharged when the system s n operaton." s only partally true. The fre servce and the ndustry has remeded ths problem by usng two pressure vessels. COMMTrEE ACTON: Reject. COMMTrEE STATEMENT: See commttee acton on publc comment 1906-54 (Log #54) whch deletes the specfc lsts of advantages and lmtatons for each system. Equpment Gram scale, 1500 gram capacty accurate to 0.1 gram One 10000ml contaner whch can be struck at 10000ml (a 10000ml graduated cylnder cut offat 1000-ml wll work well. Place the empty contaner on the scale and zero the scale. Usng the contaner, collect a full sample of foam and strl~e the foam at the 10000ml level. Place the contaner on the scale and read the mass n grams. (Log #26) 1906-96 - (A-9-3.3(d) Second System): Accept SUBMTTER: Gary Handwerk, Hale Products RECOMMENDATON: Delete (d), or reword t. SUBSTANTATON: All balanced pressure and drect njecton systems can by desgn or nstallaton do (d), so we must lst so on each system, or reword t, or delete t. COMMTrEE ACTON: Accept. COMMTrEE STATEMENT: See commttee acton on publc comment 1906-54 (Log #54) whch deletes the specfc lsts of advantages and lmtatons for each system. Expanson rato = 100 Foam mass n grams* * Note: Ths assumes that one gram of foam soluton occupes one ml of volume. COMMTrEE STATEMENT: The commttee has learned of another test whch s much smpler and easy to replcate and as such s recommendng ths other test method. Paragraph 10-3.4 has been deleted[see Publc Comment 1906.74 (Log #101)]. The commttee wshes to retan a suggested test for expanson rato and s showng t as an appendx to 10o5. (Log #25) 1906-97- (A-9-3.3(e)): Reject SUBMTTER: Gary Handwerk, Hale Products COMMENT ON PROPOSAL NO: 1906.233 RECOMMENDATON: Add text as follows: "(e) t s dffcult to determne foam concentraton level." SUBSTANTATON: Short comng, whch needs dentfyng. COMMTTEE STATEMENT: See commttee acton on publc comment 1906-54 (Log #54) whchdeletes the specfc lsts of advantages and lmtatons for each system. (Log #31) 1906-98 - (A-9-3.4(b)): Reject SUBMTTER: Robert Barraclough, Span nstruments RECOMMENDATON: Delete second paragraph under tem (b) that descrbes conductvty sensng dre'ct njecton foam proportonng and fgure A-9.3.4(c). SUBSTANTATON: Ths method of proportonng s so new that we have no experence to gude us on the parameters, the nstallaton or the expected servce lfe. Wthout some experence wth ths type of system, t s recommended that we delete any reference n ths document and hold ths for future edtons. COMM'TEE ACTON: Reject. COMMT'EE STATEMENT: Ths technology has been used for years to measure matter n water and s now beng used to measure the percentage of foam concentrate, n soluton.. t has been recognzed by the NFPA Techmcal Comrmttee on Foam for ncluson n NFPA 11, Standard for Low Expanson Foam. (Log #27) 1906-99 - (A-10-2 Surge): Accept SUBMTTER: Gary Handwerk, Hale Products RECOMMENDATON: n the defnton of surge, delete everythng after frst sentence. SUBSTANTATON: Not part of defnton or reword. (Log #33) 1906-100 - (A-10-3.4): Accept n Prncple SUBMTTE~a Bran Hutchns, Mchgan Dept. Natural Resources RECOMMENDATON: Ths test does not specfy the parameters needed. Contaner dmensons, flud pressure and dscharge attern are not determned. Splash back s not addressed. do not ~ ave the experence wth these systems ~o dentfy the optmum parameters. SUBSTANTATON: Ths test cannot be replcated as stated. Delete A-1003.4 mad add an appendx to A-1005 to read as follows: A-1003.4 flt s desred to test the expanson rato, the followng test s recommended. (Log #71) 1906-101 - (A-10-3.4): Reject SUBMTTER: Ron Rochna, Bose, D RECOMMENDATON: Revse the second sentence n the thrd paragraph to read: The foam sample s allowed to stand for 60 mnutes to allow the foam soluton to dran out. The bottom dran s opened and the soluton collected n a graduated contaner. The expanson of the foam s calculated as: Expanson = 60 gallons of foam Gallons of draned soluton Expanson = 228 lters of foam Lters of draned soluton SUBSTANTATON: The sentence s poorlywrtten and the formula that follows the paragraph s ncorrect. COMMTTEE STATEMENT: The commttee s droppng ths suggested test and replacng t wth another test. See commttee acton on publc comment 1906-100 (Log#33). (Log #28) 1906-102- (A-10-8.6): Accept SUBMTTER: Gary Handwerk, Hale Products RECOMMENDATON: Delete the words "and ar flow such that nstrumentaton s of lttle use to the operator" and replace them wth " However, nstrumentaton s stll useful to the operator. Even automatc systems have adjusunents and performance lmts whch warrant nstrumentaton." SUBNTANTATON: Automatc systems don't need nstrumentaton s not correct. COMMTrEE ACTON: Accept. (Log #72) 1906-103 - (A-12-4.4): Accept SUBMTTE~ Matthew Daschel, Warn ndustres, nc. RECOMMENDATON: Revse A-12-4.4 to read as follows: "The forward-neutral-reverse hydraulc control for the wnch should be power operated to permt remote control of the hydraulc wnch operatons. The remote control devce should be of a desgn that automatcally returns to neutral when released. The remote control should have at least 25 ft. (7.6 m) of cable. Alternately, the remote control may be accomplshed by a Federal Communcatons Commsson approved rado frequency wnch control devce." SUBSTANTATON: t s common to fnd rado frequency devces used to control wnches and hosts on moble equpment. Typcally, use of a rado frequency devce s requred when ahazardous stuaton does not allow the operator to be wthn 25 ft. of the wnch but stll n vsual range ofl COMMTrEE ACTON: Accept. 100

NFPA 1906 M F94 ROC (Log #44) 1906-104- (A-14-8): Accept n Prncple n Part RECOMMENDATON: Need more than three ponts (say 5 to 10). Photo s not of equpment lsted n "equpment requred". SUBSTANTATON: None. COMMTFEE ACTON: Accept n Prncple n Part. Delete thephoto. COMMTrEE STATEMENT: The ndustry s usng 3 ponts regularly now. A person can use more ponts f they desre to obtan a more precse lne. The commttee agrees the photograph s ncorrect and s removng t. (Log #45) 1906-105 - (A-14-8): Accept n Prncple SUBMTrER: D.W. McKenze, Forest Servce-USDA RECOMMENDATON: Test Method 2 (refractometer) should not be used on class "A" foam when testng less than 1%. SUBSTANTATON: At less than 1% refractometer method s not very accurate. Revse test method 2 to read as follows. Test Method 2. Wth the foam system n operaton at a gven flow, a soluton sample s collected from each outlet and the concentraton measured usng a refractometer to measure the refractve ndex of the foam soluton samples. Ths method may not be partcularly accurate for AFFF or alcohol resstant foam and certan other types of foam that typcally exhbtvery low refractve ndex readngs. For ths reason the conductvty method may be preferred when these products are used. Equpment requrement. A base (calbraton curve s prepared usng the followng apparatus. (a) Four 00 ml (or larger) plastc bottles wth caps. (b) One measurng ppette (0 ml) or syrnge (0 cc). (c) One 00 ml (or larger) graduated cylnder. (d) Three plastc-coated magnetc strrng bars. (e) A refractometer (f) Standard graph paper. (g) Ruler or other straght edge. Usng the water and foam concentrate from the system to be tested, make up three standard solutons usng the 100 ml (or larger) graduate. These samples should nclude the nomnal ntended percentage of njecton, the nomnal percentage plus 0.3 percent, and the nomnal percentage mnus 0.3 percent. Place the water n the 100 ml (or ]arger) graduate (leavng adequate space for the foam concentrate) and then carefully measure the foam concentrate samples nto the water usng the ppette or syrnge. Use care not to pck up ar n the foam concentrate samples. Pour each measured foam soluton from the 100 ml (or larger) graduate nto a 00 ml (or larger) plastc bottle. Each bottle should be marked wth the percent soluton t contans. Add a plastc strrng bar to the bottle, cap t and shake thoroughly to mx the foam soluton. After thoroughly mxng the foam soluton samples, a refractve ndex readng s taken of each percentage foam soluton sample. Ths s done by placng a few drops of the soluton on the refractometer prsm, closng the cover plate, and observng the scale readng at the dark feld ntersecton. Snce the refractometer s temperature compensated, t may take 0 to 20 seconds for the sample to be read properly. t s mportant to take all refractometer readngs at ambent temperatures of 50 F (0 C) or above. Usng standard, gr~aph paper, plot the refractve, ndex readng. on one axs agaanst the percent of concentraton on the other. Ths plotted curve wll serve as the known base lne for the test seres. Set the soluton samples asde n the event the measurements need to be checked. Samplng and Analyss. Collect foam soluton samples from the proportonng system usng care to be sure the sample s taken at an adequate dstance downstream from the proportoner beng tested. Take refractve ndex readngs of the sample and compare them to the plotted curve to determne the percentage of the sample. COMMTTEE STATEMENT: The commttee agrees that current hand held refractometers are not very accurate wth Class A foams. However, the commttee wshes to leave a dscusson of a concentraton test usng a refractometer n the document as there are other refractometer nstruments that can read Class A foam concentratons accurately. The commttee has revsed the descrpton of the test method to make t more generc. (Log #65) 1906-106 - (A-14-8): Accept n Prncple RECOMMENDATON: Add Method 5. Use foam percent meter (New Zealand nsttute of Geologcal and Nuclear Scences Ltd). SUBSTANTATON: The New Zealand nsttute of Geologcal and Nuclear Scences Ltd has a foam percent meter whch wll read n real tme percent of foam (Class "A'). Ths s a very easy method to use and the accuracy s very good. Address: nsttute of Geologcal and Nuclear Scences Ltd. Attn: Dr. Gavn Wallace 30 Gracefeld Road Lower Hutt, New Zealand 64-4-569-0637 COMMTFEEACTON: Accept n Prncple. Revse test method 4 to read as follows. Test Method 4. Conductvty Test Method. The conductvty test method s based on changes n electrcal conductvty as foam concentrate s added to water. Conductvty s a very accurate method provdng there are substantal changes n conductvty as foam concentrate s added to the water n relatvely low percentages. Snce salt or bracksh water s very conductve, ths method ma x not be sutable due to small conductvty changes as foam concentrate s added. t wll be necessary to make foam and water solutons n advance to determne f adequate changes n conductvty can be detected ffthe water source s salty or bracksh. Three methods can be used to determne the percent of foam soluton by the conductvty method. A. Drect readng conductvty test method. B. Conductvty comparson method. C. Conductvty calbraton curve method. A. Drect Readng Conductvty Test Method. Equpment Requred Two 100 ml or larger contaners One drect readng foam soluton conductvty meter. Procedure: Obtan a sample of the water to be used n the test usng one of the 100-ml or larger contaners. mmerse the conductvty meter head n the water sample arm zero the meter dsplay. f the drect readng foam soluton conductvty meter mounts drectly n a dscharge lne, zero the meter wth plan water flowng. f the conductvty meter manufacturer does not ndcate that the percentage of foam soluton can be read drecdy f)r the foam concentrate beng used, a calbraton curve must be developed. The calbraton curve may show that the drect meter readngs are correct for the foam concentrate beng used or t may ndcate that the calbraton curve must be used when that foam concentrate s used. Operate the foam proportonng system and obtan a sample of the soluton produced by the system usng the other 100-ml or larger contaner. mmerse the conductvty meter head n the foam soluton sample and read the percentage of the fo:un soluton on the meter dsplay. B. Conductvty Comparson Method. Two 100 ml or larger contaners.. Conducttcty meter readng n las/cm (mcrosemens per centmeter) Procedure: Obtan a sample of the water to be used n the test usng one of the 100-ml or larger contaners. Usng the conductvty meter, determne the conductvty valve of the water sample. Operate the. foam pro,[3otxonng system, and obtan a sample of the foam soluton producedby the system usmg the other 100-ml or larger contaner. Usng the conductvty meter, determne the conductvty value of the foam soluton sample. Subtract the conductvty value of the water sample from the conductvty value of the foam soluton sample ant dvde the result by 500 to get the percent of foam. Conductvty of foam soluton - conductvty of water 5OO = % of foam Note: 500 s Used as the dvsor assumng that the conductvty meter unts are 0s/cm (mcrosemeus per centmeter). Other unts of conductvty can be used but wll requre the value of the dvsor (500) to be adjusted. C. Conductvty Calbraton Curve Method. A h~nd-held conductvty meter s used to measure the conductvty of foam solutons n mcrosemen unts. Equpment Requred. Prepare a base (calbratola) curve usng tle followng apparatus: (a) Four 100 ml (or larger) plastc bottles wth ctps. (b) One measurng ppette (10 ml) or syrnge (10 cc). (c) One 100 ml (or larger) graduated cylnder. (d) Three plastc-coated magnetc strrng bars. 101