Document 6bMkZq2Kwvj5wb0ojw9oExgmm

Monsanto Dept, of Medicine & Environmental HealthJ. j.Murphy-DMEH/H. W.Morgan-S&P rt: November 9, 1979 Scott SCBA Update/Inspection Results -** S&PP/DMEH Bulletin #79-3, June 7, 1979 B. w. Eley - A2SG J. T. Garrett - A2SG H. A. Partlow - F2WA R. E. Witter - F2WA TO Location Industrial Hygienists (U.S.) Location Safety Engineers (U.S.) INTRODUCTION On June 7, 1979 S&PP/DMEH bulletin #79-3, "SCBA Alert and Inspection Request", was issued. The purpose of this bulletin was to: * Alert Monsanto locations to the potential SCBA problem. * Detail the status of the NIOSH/Scott investigation. ' Recommend that each location inspect their self-contained breathing apparatus (SCBA) for diaphragm integrity. ` Describe the proper procedure to insure that the regulator diaphragm was intact and properly sealed. ' Request that the results of these inspections be forwarded to S&PP for compilation. These inspection results have now been compiled (see page 4), and are being supplied to Scott Aviation, NIOSH and, via this memo, to Monsanto locations. IN-1 OM iflEV. 2/781 PLAINTIFF'S EXHIBIT MON-2439 LAM010630 SC 009418 BACKGROUND On May 2, 1979 the National Institute for Occupational Safety and Health (NIOSH) advised users of Scott Air-Pak II/IIA, and Presur-Pak II/IIA self-contained breathing apparatus (SCBA) of the occurrences of split or punctured regulator diaphrams. NIOSH recommended that users examine their Scott apparatus for possible damaged diaphrams. Scott issued a bulletin on the same date as the NIOSH warning indi cating that it was their feeling that the only means of rupturing, splitting or tearing a diaphram was through misuse of the breathing apparatus, either by blocking the regulator outlet with the bypass valves on and the system pressurized, or by accidentally puncturing the diaphram during field replacement, conversion or overhaul. At that time, both Scott and NIOSH indicated that they would conduct tests and field investigations into the causes of the failures. CURRENT STATUS - YOUR NEXT STEP YOUR SCOTT SCBA'S MUST BE UPGRADED/MODIFIED TO MEET NEW NIOSH REQUIREMENTS. * UPGRADING/MODIFICATION KITS ARE FREE IF ORDERED FROM SCOTT BEFORE JANUARY 31, 1980. Attached is a series of Scott communications detailing the situation up to the current time. The first communication (Appendix A) dated July 2, 1979, discusses NIOSH and Scott efforts to identify the cause of the diaphram problem. The second Scott news release (Appendix B) discusses the modification SC 009419 -2- LAM010631 program for the units in question (Scott Air-Paks II/IIA, PresurPak II/IIA, as well as sling packs and hose line/air packs in both demand and pressure demand type). The purpose of this program is to modify and upgrade ALL of the Scott SCBA equipment in question, in order to meet new NIOSH requirements and to correct any problems related to damaged regulator diaphrams used in these units. Also included is a description of the NIOSH mandated modification/upgrading of the Scott equipment in question. Finally, a user procedure for testing regulator diaphrams issued by Scott which is similar to the procedure outlined in the S&PP/DMEH bulletin is attached. The latest of the Scott communications (Appendix C) discusses a change in the modification program for Scott self-contained breathing appa ratus. Initially Scott indicated that there would be a charge of $7.95 per modification kit. Scott .and NIOSH have come to an agreement that SCOTT WILL WAIVE CHARGES FOR THE REQUIRED MODIFICATION ON UPGRADE KITS UNTIL JANUARY 31, 1980. ALL KITS ORDERED FROM SCOTT BY THAT DATE WILL BE SUPPLIED ON A NO CHARGE BASIS. All modification requests received by Scott after January 31, 1980 will be subject to a charge for the kits.' If your location uses Scott SCBA equipment, you should have received these communications in addition to a "Modification Information Card." This "Modification Information Card" should be returned to your local distributor in order that you receive the required modification/upgrade kits at no charge as soon as possible. In the event that you lack the capability to install the kits at your location, you should contact your local distributor for training on the installation procedures. Included is a listing of author ized Scott service centers as of March 1979 (Appendix D) . This list is not all inclusive. If the question arises as to an authorized "3~ cr 009420 LAM010632 Scott service center in your area, contact Scott Aviation Headquarters phone (716)683-5100. MONSANTO SCBA INSPECTION RESULTS SCBA inspection results are summarized in Table 1. All Monsanto domestic locations responded. Less than 2% of Scott SCBA's were found to be defective. Response to the inspection can only be termed as excellent, with the overall Monsanto experience very encouraging. The total number of SCBA units within Monsanto was determined to be approximately 1,400. The majority of these units were Scott, with the remaining units being MSA and Survivair, respectively. Twenty-two (22) damaged diaphragms were found out of a total of 1,200 Scott SCBA units currently in Monsanto. This includes both Air-Pak and Presur-Pak types. This represents less than 2% of the total number of units currently in service. Originally NIOSH estimated upwards of 10% of these SCBA units would be defective. This was based on an earlier limited survey of fire service apparatus. A later and more extensive survey by Scott Aviation estimated 4% of the SCBA's currently in service would have damaged diaphragms. The lower than average failure rate within Monsanto empha sizes the need for and benefit of careful monthly inspec tions of emergency respiratory protection. With the comple tion of the Scott SCBA modification program required by NIOSH to remain "approved" by the agency, this problem should be eliminated completely. 4- - LAM010633 SC 009421 >J < e* o &4 b dP O CN <#> I W U s Or < H Q a tN W CM c < a O z C<Q fr4 * Im CN dP CO 4 00 -- M z VO D CO iH b *. OH o z < M M \ <M MH M \J< M0 Hb 1 X l-i a (0 3 w b0 cs 1 (0 D i-i a) E-> H S4 U <b < b 44 T3 3 4-1 C Z 0 n) o s cn ..--. d>P 00 '---- in i--i r4 TS C (0 e -a <u ea (0 E 4) 0 l-i a3 10 X0 05 0) 1X5 l-l Sb M -a H c << 0 W s ,--. dP VO CM Cl a c 1X5 s 0 Q 0) i-i i-i i-l 3 (0 0) > 05 r4 <U >M I-I b 3 cn dP CN 00 L.O rH CN * pH V4 0 4-1 |4 0 c cn i 4-1 i-l 00 -Q SZ o cn i-4 u cn rH 10 V 0 z* -5- (4 0 4J 0 0) -4 4-> 3 H O c0 3 14 00 05 0 44 jC SZ 4-> *H X3 ,0 4-1 H 0 05 H S3- c 0 o0 o0 in 0 --0 44 00 a0 > 144 44 0 'O 0 )4 44 30 05 0 05 14 0 >4 14 0 a0 sz 0 O'. 44 rH sz 14 0 s0z |4 3 4-i 44 0 <44 0 a 0 44 0 3 44 0C c 14 0 3 0E0 o 0 4J r0- 44 H 44 0 cc 3 >. 43 0 14 14 H r4 0 --4 0 ? >0 H o 'a >0c 14 >4 0 3 cn 14 0 00 0 -3 H -c C rH 4-1 3 XX E 44 34 0 0 r4 0 44 0 >i C 44 0 0 H 14 0 14 14 0 c 30 n a SZ 0 E 0 T3 |4 C <00 009422 LAM010634 ' Suggestions on improving Scott SCBA's Summarized below are the major comments and suggestions received on the second part of the questionnaire (questions one through five). This information will be supplied to Scott and NIOSH for their use in improving current equipment and in the design of future SCBA equipment. 1. Problems encountered with SCBA's Several locations reported the following problems: (1) The availability of replacement parts for SCBA's from Scott was extremely poor. Several locations reported units have had to be taken out of service due to the non-availability of replacement parts from the manufacturer. (2) Facepiece headstraps and breathing tubes were found to deteriorate faster than would be expected. (3) Regulator valve (main and bypass) leaks and Pakalarm failures have been reported. (4) Neck gaskets on new aluminum cylinders don't appear to last as long as previous units. 2. Distributor Service Rating Twenty-six locations reported on the service they received from the distributor on Scott equipment. The summary appears below. Poor (1-2) Fair (3-4) Average (5-7) Good (7-8) Excellent(9-101 10% 0% 20% 50% 20% SC 009423 -6- LAM010635 3* eomments/Suggestions on Improving Equipment The following suggestions have been received from several different locations concerning improvements which could be made in the equipment currently marketed. * The location of the exhalation valve on new (Presur-Pak IIA) Scottoramic facepieces now restrict vision below the chin. The exhalation valve restricts movement of the wearer's neck when vision is directed downward. Older Scott oramic type facepieces had the exhalation valve located above the breathing air tube thus allowing more room to bend the neck, consequently more down ward vision. " Storage case design should be modified with a viewing window to permit a check of cylinder pressure without opening the case, * Diaphragm and regulator construction needs to be improved in order to better withstand highly corrosive atmospheres. ' SCBA harness belt buckles should be color coded, (i.e. shoulder buckle - red, waist buckle - blue) to further simplify the donning procedure. 4. Thanks to you, in the future . . . Due to the excellent response of Monsanto locations, S&PP/ DMEH can now more quickly identify and alert those locations 009424 7- - LAM010636 using personal protective equipment affected by future NIOSH/manufacturer "user warnings". If after reviewing the information contained in this bulletin you have any additional questions, don't hesitate to contact: Jim Murphy, DMEH - ext. 2746 Harvey Morgan, S&PP - ext. 6084 5. Follow-Up . . . When your location has completed the NIOSH mandated modifica tion of your Scott SCBA equipment, please detach and forward to: TO: JUANITA BROWN, S&PP STATISTICAL CLERK, F2WA, ST. LOUIS (location) modification of our has completed the NIOSH mandated (number) Scott SCBA Units. (date) (name) SC 009425 -8 LAM010637 APPENDIX A urgent READ nt^D,ATELy July 2, 1979 Dear Customer, You are aware of the Respirator Users Warning issued by NIOSH on May 2,1979, pertaining to possible ruptur ed diaphragms of Scott Air-Pak II, lla, Presur-Pak II, lla. Since the NIOSH release, our own extensive field experience and testing indicate the following: 1. Diaphragm failure will not occur during normal use of our apparatus; and 2. These Scott products continue to provide full respiratory protection as long as proper inspection and maintenance procedures are followed. Realizing your interest in our products, let me take this opportunity to provide a detailed review of this matter. NIOSH initiated its present investigation of Scott Air-Pak II and Ha series respirators after examination of four units from the Lubbock, Texas Fire Department on April 23 and 24,1979. These four units reached the NIOSH office in such condition that testing of the units was not possible without extensive repairs, replacements, and adjustments -- indicating lack of proper maintenance, inspection, and training. These were three significant conditions that materially affected the performance of the Air-Paks and Presur-Paks received from Lubbock, Texas: 1. The most important contributor to loss of respiratory protection was the condition of the high pressure hose nipple gasket. In all cases, this seal was inoperable and if an attempt was made to couple the regulator to the high pressure cylinder and open the valve, the air would leak out through the improperly maintained coupling in less than five minutes. 2. The condition of the regulator cover on at least two units revealed that the chamber under the diaphragm had been subjected to excess pressure at some time, probably due to placing the hand over the regulator outlet with the bypass valve open. This was a definite sign that damage had occurred to the regulator, and in this condition the regulator should have been taken out of service for maintenance. 3. One of the Presur-Paks had a large hole in the actuating diaphragm. This hole was similar, if not identical, to those caused by placing the hand over the regulator with the bypass valve open. When operated in the Demand mode (Note: Scott Presur-Paks are not approved for use in Demand mode, only for donning purposes), this unit showed 14% leakage, an unacceptable level. In the Pressure-Demand mode, leakage was less than 0.002%, a very acceptable level. Leakage, being outward, reduced service time. Regarding the nature of the hole in the actuating diaphragm, NIOSH personnel then checked the condition of units at the West Virginia fire Training School, where they found evidence of more damaged diaphragms. Phone calls by NIOSH to several other fire departments revealed that as many as 10% of the units surveyed had some form of holes. Without further test work to establish the effects of small pinholes and slits in diaphragms, NIOSH immediately undertook the task of releasing their Alert to the field and requested Scott to "stop sales". Since the Respirator Users Warning was issued on May 2, surveys of Scott equipment in the field have been completed by Scott and NIOSH personnel in the areas of Washington, D.C. and Buffalo, N.Y., and by Scott personnel in Texas, Louisiana, Arkansas, and the San Francisco area. The picture that emerges from this ex tensive investigation is somewhat different from NIOSH's earlier limited survey. First, the number of ruptures characteristic of overpressure below the diaphragm was extremely small (0.6% of the units examined) and they occurred more frequently in pressure-demand apparatus fhan in demand units. They also occurred more often in units used in training than in units used in service. Slits and pinholes occurred almost 10 times as frequently as large holes due to overpressure conditions. Only 4% of the units examined by NIOSH and/or Scott personnel contained damaged diaphragms. t?. ; <! x SC 009426 LAM010638 This investigation establishes that the incidence of damage in the field is no greater than could be expected from the required AQL's in the manufacturing process. Repeated surveys of Scott's manufacturing and quality control systems show that percent defectives among units shipped are far lower than the allowable; therefore, it is obvious that the diaphragm damage is occurring while in the hands of the user and is due to abuse and/or improper maintenance. As a result of this diaphragm damage (holes, slits, pinholes), the following conditions exist in the field: 1. Demand units with a large hole in the diaphragm due to blockage of the regulator outlet result in reduced respiratory protection. This condition is detectable by blowing into the regulator outlet as described in the NIOSH Respirator Users Warning. 2. Demand units with slits, pinholes, etc., may result in minor leakage (0.2%). Again, this condition is detect able by blowing into the regulator outlet. If significant leakage exists, a slight positive pressure cannot be maintained. 3. Units in the Pressure-Demand mode with a large hole in the diaphragm due to blockage of the regulator outlet provide complete respiratory protection, but some loss of duration may be noted because all leakage is outward. In the Demand mode (approved for donning and doffing only), respiratory protection will be reduced. Again, this condition is detectable by blowing into the regulator outlet during pre-use inspection; in use the condition is obvious because the flow of air is audible to the user. Further, the depletion alarm still warns the user to approaching exhaustion of the air supply, to provide enough time to leave the dangerous atmosphere area. In any case, it should be noted that diaphragm failure will not occur during normal use of the apparatus. Since May 2, Scott has met on numerous occasions with NIOSH personnel and with representatives of the International Association of Fire Fighters, the U.S. Fire Administration, and the Department of Labor (OSHA). Scott has conducted and completed an extensive program to; 1. Describe and verify all causes of damaged diaphragms. 2. Characterize holes, slits, punctures, as to significance and effect on user protection. 3. Develop and design hardware changes to prevent large punctures due to product misuse and verify the effectiveness of these changes. 4. Improve operation and maintenance instructions and warnings to the user. 5. Provide new parts and instructions to users in the field. 6. Submit to NIOSH a request for extension of approval of the hardware and software changes listed above. We are now awaiting completion of testing and other segments of the approval process that should result in revocation of the NIOSH "stop sales" request to Scott. The top quality of Scott Air-Pak I I's for the past fifteen years is unequaled. The important point Is that all of the diaphragm problems covered in this report relate to misuse or maintenance, not the design or manufacture of Air-Paks. With the proposed modifications, we expect to minimize damage that can result from abuses or lack of maintenance. Your continued support is sincerely appreciated. Cordially. PrnTT AtflATlAll Edward J. Fierle President SC 009427 SCOTT AVIATION, A Olvition of A-T-O Inc. LANCASTER, N. Y. 1*088 TEL: 718 883-8100 TELEX: 91-394 LAM010639 SCOTT ATO APPENDIX B GENT- REa,} Mediately September 4, 1979 Dear Customer: Scott Aviation has recently undertaken a program to modify Scott Air-Paks*II, Ila, Presur-Pak'II, Ila, Sling-Paks*and Hoseline/Air-Paks in both Demand and Pressure-Demand type apparatus. The purpose of the program is to modify and up grade all of these products in use, in order to conform to new NIOSH requirements and to correct any problems relating to any possible damage to the diaphragms utilized in these products. NOTE - Failure to modify and upgrade your equipment may cause OSHA citations or reduce respiratory protec tion if damage to diaphragms occurs. We urge all customers to respond promptly to this notice. It is Scott's position that damage to diaphragms can only occur through misuse or abuse, however, we wish to do everything possible to improve these products for the benefit of our customers. All customers should complete the enclosed Modification Information Card as soon as possible and return it to your Scott Distributor or to Scott Aviation. Because of the scope of this replacement program, extraor dinary measures will be necessary to bring about an orderly exchange program. While it is expected that replacement parts will be available within a reasonable time after you contact Scott or your distributor, some additional delay may occur due to inventory shortages. Complete installation instructions will be furnished, and Scott distributors will supply training in retrofit pro cedures, if required. Third-party installation of- the parts involved can be provided if experienced personnel are not available. Your Scott Authorized Distributor can assist you in arranging for this service. Depending on the age SC 009428 LAM010640 (continued) SCOTT AVIATION, A Division of AT-O Inc. LANCASTER, N. Y. 14086 TEL: 716 683 5100 TELEX: 91-394 September 4, 1979 Page Two and condition of your Scott units, we suggest you consider com plete overhaul of the regulators involved and upgrading to NIOSH approval levels of those units in your possession that were approved by the U.S. Bureau of Mines. IMPORTANT! We urge you to act immediately. Contact your Scott distributor or Scott Aviation for complete details. For emergency situations, including replacement of diaphragms with major ruptures that place the Air-Pak out-of-service, call Scott toll free at 800-828-1577. Until replacement takes place, inspection and maintenance pro cedures should be followed. The enclosed "User Procedure for Testing Regulator Diaphragms" should be as standard operating procedures and will ensure continued reliability and full respira tory protection, before and after your units have been modified and upgraded. We regret the inconvenience this modification and upgrade program may cause you, but trust you will understand that our prime interest is your full satisfaction with Scott Aviation and our products. Many thousands of Scott Air-Paks II and Ila type products have been in use for over twelve years and have achieved an outstanding record for performance and reliability. Our intent is to make the best even better. If you have special situations not covered by this notice, please contact my office. Cordially, SCOTT AVIATION Director of Sales & Marketing Health/Safety Products <^ LCB:pb end. P.S. Please note this field modification program does NOT apply to Scott Air-Paks 4.5 series, 2.2 series, Ska-Pak* Airline Respirators or Air-Pak I's. LAM010641 NIOSH MANDATED MODIFICATION UPGRADING OF AIR PAR II, Ha, PRESUR PAX II, Ha, SLING PARS AND HOSELINE AIR PARS TO MEET NEW DIAPHRAGM OVERPRESSURIZATION REQUIREMENTS The enclosed postpaid card should be filled out and returned to Scott Aviation or your local Scott distributor. It is extremely important to make sure you have filled in the apparatus quantity correctly and include the name of your local Scott Authorized Distributor. Modification of your Air Paks II, Ila, Presur Pak II, Ila, Sling Paks and Hoseline Air Paks consists of installing a new, tough, but pliable diaphragm for additional protection against abuse, which is furnished at No Charge ($7.35 value). Upgrading of your apparatus consists of installing a new regulator outlet, a new breathing tube coupling along with all the necessary labels, identification tags and instructions needed to comply with the new "diaphragm overpressurization" requirements recently established by NIOSH. We wish to emphasize that diaphragm damage can only occur through misuse, abuse or improper maintenance of the apparatus and does not occur during actual use of the apparatus. In order to comply with the new NIOSH test requirements, a mandated change was incorporated into the regulator/breathing tube connection which prevents overpressurizing the diaphragm chamber at full cylinder pressure and full open bypass valve. Scott's design supplies sufficient air to the user at low cylinder pressures, to allow egress from unsafe areas when the bypass system is utilized. All future deliveries of new Scott Air Pak II, Ila, Presur Pak II, Ila, Sling Paks and Hoseline Air Paks will include the new diaphragm, regulator outlet and breathing tube coupling. NIOSH requires that all respirators in use be modified and upgraded to include these new parts as quickly as possible. Scott has agreed to furnish new diaphragms for all respirators in use, free of charge as a matter of sales policy. Further, Scott has established a special price of $7.95 each per kit to cover handling and a portion of the costs of the new regulator outlet, breathing tube coupling, labels, tags and installation instructions required by NIOSH that relate directly to the new test protocol. We strongly suggest that when the apparatus is being modified and upgraded, it be checked out and tested to ensure its performance meets all existing requirements. Functional, well maintained apparatus and properly trained personnel are necessary for full respiratory protection. SC 009430 LAM010642 USER PROCEDURE FOR TESTING REGULATOR DIAPHRAGM IN SCOTT AIR-PAK ll/lla, PRESUR-PAK ll/lla, SLING-PAK ll/lla (Demand & Pressure-Demand) & AIR-PAK HOSELINE APPARATUS TO INSURE CONTINUED PROPER USE AND FULL RESPIRATORY PROTEC TION, USE THIS PROCEDURE INCLUDING PROPER MAINTENANCE AND TRAINING. 1. Remove breathing tube from regulator outlet by un threading breathing tube coupling. 2. Close cylinder valve by pushing in and rotating cylin der valve knob clockwise 3. On cylinder valves equipp ed with locking lever, release locking lever and rotate cylin der valve knob clockwise 4. Place regulator outlet to mouth and inhale to re move any trapped air pressure 5. Close regulator BY-PASS valve (RED KNOB) by turning fully clockwise 009*31 SC 6. Close regulator MAIN LINE valve (YELLOW KNOB) by depressing lock-tab and turning valve knob fully clock wise LAIV1010643 7.Check regulator cover to ensure that the three (3) cover screws are pre sent, tight, and cover is properly positioned NOTE: If cover screws are loose or cover is dislodged or damaged, remove regula tor from service, tag, and have repaired by author ized personnel. 8. Place regulator outlet to mouth and gently in hale. There shall be no flow (leakage) through the regulator. A negative pressure shall be main tained for approximately 10 seconds. If flow (leak age) is noted, REMOVE APPARATUS FROM SERVICE, TAG AND HAVE REPAIRED BY AUTHORIZED PERSON NEL 9. Gently exhale with mouth to regulator outlet. There shall be no flow (leakage) through the regulator. A positive pres sure shall be maintained for approximately 10 seconds. If flow (leakage) is noted, REMOVE AP PARATUS FROM SER VICE, TAG AND HAVE REPAIRED BY AUTHOR IZED PERSONNEL. 10. Regulator outlet shall be sanitized after testing by using an alcohol solution. 11. If no flow (leakage) occurs, return regulator to stand-by posi tion by fully opening MAIN-LINE VALVE and following recom mended Operational Procedures enclosed with each apparatus. The unit may then be placed back into service. H/S 5320A 7/79 SCOTT AVIATION. A Division of A-T-O Inc.. LANCASTER. N.Y. 14086 LAM010644 Printed in USA DEPARTMENT OF HEALTH, EDUCATION. AND WELFARE f /. PUBLIC HEALTH SERVICE r CENTER FOR DISEASE CONTROL NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY ANO HEALTH------ALOSH 944 CHESTNUT RIOGE ROAD MORGANTOWN, WEST VIRGINIA 2650S September 18, 1979 Enclosed are the materials you requested on the recent diaphram problems experienced by users of certain Scott Aviation selfcontained breathing apparatus. As mentioned in the respirator users notice, Scott is beginning to modify existing respirators to conform to their extensions of approval. NIOSH will maintain surveillance over the modification nrocedure. If you experience problems with the modification, you can call Scott Aviation at their (800) S28-1577 number for assistance or contact NIOSK. Enclosures Chief, Respirator Section Testing and Certification Branch Division of Safety Research > ( H/SS320A 7/79 SC 009433 LAM010645 I! SCOTT AVIATION, A Division of A-T-O Inc., LANCASTER. N Y. 14086 Printed in USA DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE CENTER FOR DISEASE CONTROL NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH 5600 FISHERS LANE ROCKVILLE. MARYLAND 20857 Augusc 30, .1979 RESPIRATOR USERS NOTICE The National Institute for Occupational Safety and Health (NIOSH) recommended on May 3, 1979, that Scott Aviation, a division of A-T-O, Inc., stop the sale of Scott Air Pak II/IIA and Presur-Pak II/IIA selfcontained breathing apparatus (SCBA). On the same date, NIOSH warned users of these respirators that serious malfunctions in regulator diaphragms may shorten service time of the units and reduce respiratory protection. In response to NIOSH's concerns, Scott has made provisions to correct the problems in units now in use and to make the necessary modification on all future respirators manufactured. Based on these commitments from Scott, NIOSH has withdrawn the stop sale request of May 3, 1979. NIOSH investigations of these Scott respirators revealed that regulator diaphragms were punctured or ruptured in about 10 percent of the units tested. Two major causes of these problems were found to be abrasion of the diaphragm by the retaining ring and overpressurization caused by blocked airflow. Scott has developed solutions to both _ problems. The regulator outlet port has been redesigned to prevent the f ? possibility of blocked airflow while the by-pass valve is open. In addition a thicker, more resilient diaphragm has been adopted. New specifications for the retaining ring will ensure a smoother finish and eliminate sharp edges that could puncture the diaphragm. Diaphragms and retaining rings on all respirators will be carefully inspected during production by Scott quality assurance personnel. Scott will modify all existing respirators including those held by its distributors, as well as all respirators manufactured in the future. Scott has also agreed to modify, at no charge, all Air Pak II/IIA and Presur-Pak II/IIA and certain other respirators currently in use. Owners of these respirators (Scott I.D. respirator numbers: 900000-00, 900014-00, 900002-00, 900015-00, 900006, 900007) should contact their Scoi:t distributor or Scott Aviation to have the modifications made. NIOSH believes these modifications--if made by experienced, authorized persons in accordance with the manufacturer's instructions--will ensure that the Scott Air Pak II/IIA and Presur-Pak II/IIA and other SCBA and combination units noted above will operate safely. To obtain Information or to have the modification made, contact your Scott distributor or Scott Aviation directly at this toll free number: 800-828-1577. H/S S320A 7/79 SCOTT AVIATION. A Division of A-T-O Inc., LANCASTER. N.Y. 14086 LAIVJ010646 Printed in US; appendix c UR GENT REad ^mediately October 12, 1979 Dear Customer, Scott Aviation is pleased to advise of a change in our program to modify and upgrade Scott Air Pak II 's and related products in accordance with NIOSH requirements. In recognition of budget limitations faced by many cities and towns, Scott will waive charges for the required Modification and Upgrade Kits until January 31, 1980. All Kits ordered by that date will be supplied on a No Charge basis. If you haven't done so already, complete the attached Modification Information Card as soon as possible and return it to your Scott Distributor or Scott Aviation. Customer requirements received by Scott after January 31, 1980 will be subject to a charge for the Kits. Installation of Modification and Upgrade Kits is considered Field Level Maintenance, easily done by experienced personnel. If you lack the capability to install Kits, contact your distributor for training on the installation procedures, or have him do the work for you for a fee. We believe this change in our program will accelerate its completion. If you have any questions, please feel free to contact the writer at any time. SC 00943s SCOTT AVIATION, A Oivigion of A T-O Inc. Cordially, ^% Lincoln C. Bailey Director of Sales 8 Marketing Health/Safety Products LAM010647 LANCASTER, N. Y. 14086 TEL: 716 683-5100 TELEX: 91 -394 BUSINESS REPLY MAIL FIRST CLASS PERMIT NO. 65 LANCASTER. N.Y. POSTAGE WILL BE PAID BY ADRESSEE SCOTT AVIATION ATTN: DEPT. SRP 225 ERIE STREET LANCASTER, NY 14086 NO POSTAGE NECESSARY IF MAI LEO IN THE UNITED STATES PLEASE FORWARD THE FOLLOWING INFORMATION TO EXPEDITE THE SCOTT MODIFICATION KiT PROGRAM. FULL DETAILS WILL FOLLOW RECEIPT OF THIS INFORMATION. OWNER: COMPANY/FIRE DEPARTMENT: ______________________________________ ADDRESS:-------------------------------------------------------------------------------- -- CITY. STATE. ZIP CODE: _____________________________________________ TEL. NO.: DATE -------------------------------------------------------------------- NAME: NUMBER OF APPARATUS: DEMAND (30 .MIN.)PRESSURE-DEMAND (30 MIN.) _ DEMAND (15 MIN.)PRESSURE-DEMAND (15 MIN.) SCOTT DISTRIBUTOR:------------------------------------------------------------------------REQUESTING COMPANY. IF DIFFERENT THAN "OWNER". COMPANY/FIRE DEPARTMENT: ----------------------------------------------------------ADDRESS: ------------------------------------------------------------------------------------------ CITY. STATE. ZIP CODE: ---------------------------------------------------------------------- HOSELINE (DEMAND) HOSELINE (PRESSURE-DEMAND) TEL. NO.: DATE:NAME: SC 009436 LAM010648 sane sc 009437 AUTHORIZED SCOTT SERVICE CENTERS APPENDIX D MARCH, 1979 ALABAMA Safety Engineering & Supply Co. P.O. Box 1626 617 N. 13th Street Birmingham. Alabama 35203 TEL: 205 322-5652 CALIFORNIA Av-Ox incorporated 15746 Stagg Street Van Nuys. California 91406 TEL: 213 787-3852 E.O. Bullard Co. 27185 East Fifth Street Highland, California 92346 TEL: 714-862-6550 E.O. Bullard Co. 2680 Bridgeway Sausalito. California 94965 TEL: 415 332-0410 CANADA Safety Suply Company 6120 99th Street Edmonton, Alberta Canada T6E 3P2 TEL: 403 438-1310 Safety Supply Company 214 King Street. East Toronto, Ontario Canada MSA 1J8 TEL: 416 364-3234 Safety Supply Company 5545 St. Jacques, West Montreal. Quebec Canada H4A 2E4 TEL: 514 487-1610 CONNECTICUT Shipman's Fire Equipment Co. 122 Cross Road Waterford. Connecticut 06385 TEL: 203 442-0678 FLORIDA Barfield Instrument Cotp. 4101 N.W. 29th Street Miami, Florida 33142 TEL: 305 871-3900 National Safety Supply. Inc. 913 North Andrews Avenue Fort Lauderdale, Florida 33311 TEL: 305 763-1248 ILLINOIS Fredriksen & Sons Fire Equipment Co. 760 Thomas Drive Bensenville, Illinois 60106 TEL: 312 595-9500 Glazebrook Fire Equipment Co. 401 Peoria Street/RL 24 Washington, Illinois 61571 TEL' 309 283-8417 IOWA Syflo Company 1213 Locust Street Dee Moines, Iowa 50309 TEL: 515 288-6414 KANSAS American Fire Equipment Co. 808 North Tenth P.O. Box 1586 Salina, Kansas 67401 TEL: 913 823-2275 KENTUCKY Orr Safety Equipment Co. 2360 Millers Lane Louisville. Kentucky 40216 TEL: 502 774-5791 LAM010649 MAINE Blanchard Associates. Inc. Western Avenue Wlnthrop, Maine 04364 TEL: 207 377-8304 MARYLAND Maryland Fire Equip. A Supply Corp. 12284 Wilkins Avenue Rockville, Maryland 20852 TEL: 301 881-2713 MASSACHUSETTS David G. Deane 33 Amity Court Springfield, Massachusetts 01108 TEL: 413 732-5185 MICHIGAN Great Lakes Instrument Service Inc. Willow Run Airport Ypsilanti, Michigan 48197 TEL: 313 483-7733 Northern Fire & Safety Inc. P.O. Box 833 1235 U.S. Rt. 23 Sutler, New Jersey 07405 TEL: 201 838-6260 NEW YORK B-Lann Equipment Co. 2299 5th Avenue Troy, New York 12180 TEL: 518 274-7888 Firematic Supply Co., Inc. Mill Road and Main Street Yaphank, New York 11980 TEL: 516 924-3181 Nichols Oxygen Service Route 9-G Hyde Park, New York 12538 TEL: 914 229-8181 South Shore Fire Equipment 579 Newbridge Avenue East Meadow, New York 11554 TEL: 516 794-4000 State Fire Control 1243 Military Road Buffalo, New York 14217 TEL: 716 874-4700 Tech Supply Company 18 Avis Orive Latham, New York 12110 TEL: 518 785-7122 NORTH CAROLINA Air Products & Chemicals 115 Southern Oxygen Road Greensboro. North Carolina 27407 TEL: 919 299-1361 OHIO S.R. Smith Co., Inc. 8551 Brookpark Road Cleveland, Ohio 44129 TEL: 216 661-9900 MINNESOTA Fire Safety & Communications Co. P.O. Box 660 533 6th Avenue, N.W. Rochester. Minnesota 55901 TEL: 507 288-4975 NEW JERSEY Fire Fighters Equipment Co. P.O. Box 640. Rt. 10 Dover, New Jersey 07801 TEL: 201 366-4466 Guardian Safety Equipment Co. 37 East 21st Street Linden, New Jersey 07037 TEL: 201 925-0520 PENNSYLVANIA Guardian Safety Equipment Co. 214 South 45th Street Philadelphia. Pennsylvania 19104 TEL: 215 382-2350 Safety First'Supply Company 526 Island Avenue McKees Rocks. Pennsylvania 15136 TEL: 412 331-3200 Smith's Fire Service R.D. No. 1, Haymaker Road Eldred, Pennsylvania 16731 TEL: 814 225-4441 H/S 5313 3/79 SCOTT AVIATION, A Division of A-T-O Inc., LANCASTER, N.Y. 14086 Printed in USA (SEE OTHER SIDE) SOUTH CAROLINA Anderson Fire & Safety Equipment Co. West Standridga Road Andarson, South Carolina 29621 TEL: 803 225-1128 TENNESSEE Industrial Rubber Products Inc. 1600 E. 27th Street Chattanooga. Tennessee 37401 TEL: 615 698-8041 TEXAS Industrial Safety Division Vallen Corporation 13333 N.W. Freeway Houston. Texas 77040 TEL: 713 462-8700 WASHINGTON Safaty & Supply Company 5510 East Marginal Way. So. Seattle, Washington 98134 TEL: 206 762-8500 WISCONSIN Interstate Welding Sales Corp. 1801 Marinette Avenue Marinette, Wisconsin 54143 TEL: 715 732-0176 WYOMING Becker Fire Equipment Co. 1717 East Yellowstone Casper, Wyoming 82601 TEL: 307 265-1083 009^ SC LAM010650