Document ppK11Yk6xG0NLoR99LwEnmL1D

FILE NAME: Abex (ABX) DATE: 1974 Sept-Oct DOC#: ABX207 DOCUMENT DESCRIPTION: Internal Report - Abex Corp. - An Evaluation of Various Factors Influencing Airborne Asbestos Concentrations ABEX CORPORATION AN EVALUATION OP VARIOUS INFLUENCING AIRBORNE ASBESTOS CONCENTRATIONS PMCT1O N _ P R ^ 8 G ^ P - TM f ORIGINALS CCS G. Nicholson C. C. Blackwell Jt A, A. Borin C. 1,1 Broadstreet E. H. Feierabend D. Gidley M.D. C. B. Mallory D. K. Rennie F. E. Tayler, Jt# J. F. Fagan - IC industries SPNY 003283 abex corporation AM EVALUATION OP VARIOUS FACTORS IHFLUKNCINO airborne asbestos CONCENTRAT IONS FRICTION PRODUCTS GROUP - WINCHESTER SEPTEMBER 30. 1974 - OCTOBER 4. 1974 PURPOSE The purpose of this associated with the visit ,RW ""' ^ ,, **^ f"^vaHoua'friction products ^ ,, f a c t o r . upon the i ? ^ r ^ c T t r ^ r ...Odatad with th. P~ee.se. ,, this atudy, For the purposes of this at was essentially confined t book preformers, the bio P machines. Samples were b*rteen the scope of this evaluation general locations* the ana the strip roll other locations, hut the these three locations. majority of The variables that were c ^ during this studyj"" * length of the asbestos the type of mix used and , the height of the employees, associated with the or dirty), and the the working habits of ^ enclosures upon the airborne effect of additional experimental encAo concentrations of asbestos. Th. suits of this study and the degree of at the various preforming asbestos concentrations g^erated t w d the employee operations. The factor, of 2id t h e M alvas did Each o* the 1 piOTgsm * a ls *tt#ched- Ulx type Using *"* mix types (see Appendix #2). n- emerge, airborne asbestos at -V -- * -- ~ SPNY 003284 1- mixes containing more of the longer asbestos fibers in their composition are associated with higher airborne asbestos con centrations. ho nixes containing the longer asbestos fibers are generally lighter and fluffier than the mixes containing more of the shorter asbestos fibers. The lightness of the nix ^ e to the propensity for the airborne distribution of the asbestos fibers* Regarding wet mixes and the amount of airborne asbestos that they generate, reference is made to Appendix samples#14 & #15^and #20 & #21. These four samples were taken a* two similar strip roll machines (#3 & #4). These two machines were sampled in the morning and in the afternoon on the same dav The only variable was that the operators switched ^ i n S iTto. afternoon. Both operator. -elected a b o u t the . a n height, and both work vary cleanly. "ltl"9 asbestos concentrations were as follows* strip roi* #14 0.50 . #4 - (sample #15 0,43 fibers> W 1) strip roll majmin * ^ ample #20 0.29 fiber.?. Sfi/ml), and trip toll nachine #4 tamale #21 0.18 fibera>S;u/l>. The averag. ol thaae iour ' , T~ n rjc Vkars >5n/ml which is very low especially CSS thaw eXhaSt ventilation provided at t h e 2 2 i 2 T S T S t * - . . by binding the aabeatoaiiberewtth the other components in the mix. generate very little airborn asbestos in the preforming stages# The length of the aabeeto. fib, need in the various mires ia*alao^a significant factor related to airborne concentration. Referring to Appendix #2 9*1?. "*t ^ e studied contained approximately SO* of the long fib, asbestos and 50 of the short tilxxvS a.beato.. The fiber count computed for these mix types we. ^ o u t 1^5 fibs* t T / h . Thl. average figure can be compared vlth .amplea ^ containing only tha longer fiberad Mbeetoii. beeto in the"block pr.formdepart^nt j * . result. for r ^ f I b T r S 5L r 1 h ^ . 4; ^ S " . S & i i m a t i l y 2% t * a S S ^ T S * aeotated with mix, containing . 1 a*nt. of the short and long fibered asbestos. S S SSL Another comparative observation made was bet*1* .It. tab, at aame operator but with another mix (mix 551CSC), Tnxs w sample #16 and the resulting concentration was 1# SPNY 003285 -2- > ju/ml almost 3 times less than the airborne concentration that was generated when 80 mix was being used at the machine* these results strongly indicate that the dry fluffier asbestos mixes containing the longer fibers will generate more airborne asbestos than mixes containing asbestos of shorter fiber length* Perhaps the shorter asbestos fibers are more effectively bound up in the mix than the longer fibers. In any event, substi tution of the longer flbered asbestos by the shorter fibered asbestos should be investigated. gmpiovaa Height Another of the variables studied was the relationship between the height of the employees and the air borne asbestos levels* Attention is called to Appendix #3 which gives comparative data on employee height and Appendix #4 which gives data about the book preform area. For the purposes of determining the effect of the operator height on airborne asbestos concentrations, a total of 4 samples were taken. The pfO operators selected were 6 ft* tall and 5 ft. 6 in. short, respectively* and they changed positions so that each worked on all four machines for equal periods of the sampling day. All of the other conditions, mix type, etc., remained the same. Samples #1 & #2 and samples #12 & #13 represent this sampling situation. Operator #3C-4418 (6 ft. tall) worked on machines #9 and #13 (sample #1) in the morning and then machines #15 and #16 (sample #12 in the afternoon* Bis levels of exposure were identical (sample #1-1*46 fibers >5u/ml) (sample #12-1.46 fibers > $u/ml) His average exposure was 1.46 fibers >-5>A>l* Operator #3C-730 worked on machines #15 and #16 (sample #2) in the morning, and then on machines #9 and #13 (sample #13) in the afternoon. His levels of exposure were (sample #21.75 fibers> 5ja/ml), (sample #13-1.54 fibers >5ji/ial). His average exposure was 1.64 fibers > iju/ral. These results indicate that the operator height is not an important factor in regards to employee exposure to airborne asbestos* . WftrVrfna Habits The type of working habits studied S a ^ L i a L d 3 i ^ e degree of care an employee took when working with the mixes and how much dirt was being generated during his normal working activities. Two arbitrary P***" meters, clean and dirty, were selected. Clean meant that the SPNY 003286 3- operator did not generate large amounts of dust es he worked and that he kept himself relatively clean for the operation involved Dirty meant that the operator generated more dust th?n average and that his person was pretty dirty too* Refer ence is made to Appendix #3 which compares the operators* working habits* The average concentration for clean operations was 1*53 fibers 7 (for 12 samples)* The average concentration for dirty operations was 1.61 f i b e r s (*<>* 7 samples). During this study the operators would work on the same machines to keep the number of variables to a minimum. The average concen trations for the clean and dirty operators were based on dry .<v*g containing approximately 50% long and 50% short asbestos fibers. Samples involving 80 mix and wet mixes were not con sidered because of the effects that those variables had upon the concentrations. The results of these tests indicate that the differences between dirty and clean operators in their ^ exposures were not significant under similar working conditions and with the same mixes. Raraarimental Enclosure Pour machines (#9,#13, #12 ^" " V # 16* in the book preform department were chosen in order to see the effects of additional enclosure upon airborne asbestos concentrations. The attached sketch #1 gives a rough indi cation as to what the additional enclosure consisted of. Appendix #4, samples #25 & #26 and #27 & #28 give the results of these tests. Samples #25 & #26 were taken at machines #9 & #13 and #12 & #16 respectively, before the additional en closure was attached. 8amples #27 & #28 were taken at the same machines respectively after the additional enclosure was attached. The sample results are as follows* a. sample #25 - 1.75 fibers >5u/ml (no additional enclosure), b* sample #27 - 0.84 fibers > 5u/ml (with additional enclosure). , c. sample #26 - 2.31 fibers >^*/ml (no additional en closure) d. sample #28 - 1.31 fibers > 5/ml (with additional enclosure). These test results clearly indicate that the exposure levels were reduced in half as a result of the additional enclosure. SPNY 003287 -4 - AS a result of this study the following recommen dations axe made* 1. At the book preform, block preform, disc preform and other areas where high aixboxne asbestos concentra tions have been detected, enclose the operations as ffM Ch as is practical. Sheet metal enclosures are preferable, but canvas or lead vinyl curtains can be effectively used too. 2. Where practical, substitute wet mixes for dry mixes in the preforming stages, 3. Where practical, substitute mixes containing asbestos fibers of shorter length for mixes containing asbestos fibers of longer length. During the visit, I received excellent cooperation from Jeff Nicholson, Lloyd Broadstreet, Roger Dillon, Charlie Mallory, and Bob Brown. I thank them all for their assistance and courtesies VISITED BY 6223^ 11/6/74 industrial Hygienist 5 SPNY 003288 FRICTION FRODDCTS GROUP mcassYBR* yifvfm mmx&M e m .w m m Fiber count>5n/ml-l.46 Lab No, - 1839 Loo Book Preform #13 (new exhaust design) & Book Preform #9 (Id exhaust design) Med, Study #3C-4418 Date - 10-1-74 Time 855am-10i42am Sampling rate in liters per min. - 1.9591 Air vol.(liters)-209.6 Avge eount/field-2.00 Mix used #13-55lD-333 Mix used #9-55lD-333 Percent long fibers in mix 551D-333 - 5596 Percent short fibers in mix 551D-333 - 45% work habits - clean worker height - 6 ft. Ventilation (fpm) #13 a. at weigh scale slot face - 3,500 b. at front hood press face - 600 c. at side hood face- 300 Ventilation (fpm) #9 a. at top hood face - 1,200 earn .#? Fiber count^%o/ml-1.75 Lab No, - 1840 Loo.-Book Preform #15 & Book Preform #16 (both are old exhaust design) Med. Study #30730 Date - 10-1-74 Time 900am-1054am Sampling rate in liters per min. - 1.9823 Air vol.(liters)-226.0 Avgecount/field-2.58 Mix used #15-133-9 Mix used #16-55lD-333 Percent long fibers in mix 133-9 - 26% Percent short fibers in mix 133-9 - 74% Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% work habits - dirty worker height - 5*6" Ventilation (fpm)#15 a. at top hood face 1,300 Ventilation (fpm) #16 a. at top hood face 1,200 FIEUD SAMPLE #3 Fiber count>5^/nl-4110 Lab NO. - 1841 Loc.-Book Preform #5 Med, Study #3C-4059 Date - 10-1-74 Timet 921am-1048am Sampling rate in liters per min.-1,9591 Air vol.(liters)-170.4 Avge. count/field-4.55 Mix used #5 - 80 mix Percent long fibers in 80 mix - 100% Percent short fibers in 80 mix - 0% work habits - dirty Worker height - 6 ft. Ventilation (fpm) #5 a. at front hood face 1,500 (left) Double cavity machine SPNY 003289 gMSTCT m m s r s m m WINCHESTER, VIRGINIA mmm Fiber count>5n/ml - 1.7'33 Lab No - 1842 Loc,-Block preform #17 Medical Study #30735 Date 10-1-74 Timet 9t27am-10i45am Sampling rate in litersi per mink-1.9359 Air vol.(liters)-151.0 Avge.count/fifcld-1.71 Mix used #17--551-C Percent long fibers in mix 551-C - 56% Percent short fibers int mix 551-C - 44% work habits - clean worker height-6'l" Ventilation (fpm) a. at front hood face- 1.600 Single cavity machine Fiber oount>$u/ml - 1.20 Lab NO. - 1843 Loc. - Disc brake preform #1 Mad. Study #3C-424 Date - 10-1-74 Times 9t34am-llt31am Sampling rate in liters per min.-1.9823 Air vol.(liters)-232.0 Avge.count/field-1.82 Mix used -672-124 Work habits - clean Worker height - 5'8N Ventilation (fpm) a. left side press area 1.200 b. right side press area 1.200 FIELD SAMPLE 6 Fiber count>$u/ml-0.00 Lab No. - 1844 Loc. - Blank Date - 10-1-74 SPNY 003290 FRICTIOM gfflppcig. m m Filier count >$u/ml-2.99 Lab No. - 1845 Loc.-#2 line Blok O.D. grinder #SKA-442 #3 Med, Study #3C-2095 Date - 10-1-74 Timas 9s39am-llt34am Sendling rate in liters per min.-1.9591 Air vol.(liters)-225,3 Avge.count/field-4,39 Work habits - clean worker height-6*1" Ventilation (fpm) a. at wheel hood face 1.800 m m u f l a w swi.fi m Fiber count>5ja/nl-0.60 Lab. Ho. - 1846 Loc.-Set on a post about 6 ft. from Field Sample #7 Date - 10-1-74 Time i 9s41am-lls37am Sampling rata in liters per min,-1.9591 Air vol.(liters)-227.3 Avge.oount/f ield-0.90 EMP. fiAflfMS #9 Fiber count>Sji/bl-l.ll Lab Ho. - 1847 Loc.-Mill groove ABB-W-- 567 Med.Study #3C-727 Date - 10-1-74 Timet 9t43am-lli47am Sampling rate in liters per min. -1,9823 Air vol.(liters)-245.8 Avge.oount/field-1 79 work habits - clean Worker height - 6 ft. Ventilation (fpm) a. at wheel hood face 1,800 SPNY 003291 FRICTION PRODUCTS GROUP MBBiWff vto inia giro. s m u t m Fiber count>5p/ml-l.68 Lab.Ho* - 1848 Loc.-Block preform #10 Med. Study #3C-735 Date - 10-1-74 Time* ll39am-ls55pm Sampling rate in literet per min.-1.9359 Air vol.(liters)263.3 Avge.count/field-289 Mix used - 551D Percent long fibers in mix 551D-333 - 55% Percent short fibers ini mix 551D-333 - 45% work habits - clean Worker height - 6*1" Ventilation (fpm)#10 a. at front hood face 1,600 Single cavity machine FIBLD SAMPLE #11 Fiber count>5u/ml-3.59 Lab. No. - 1849 Loc.-Block preform #5 Med. Study #3C-4059 Date - 10-1-74 Time11*41am-ls57pm Sampling rate in liters per. min.-1.9591 Air vol.(liters) 266.4 Avge.count/field-6.30 Mix used - 80 mix * Percent long fibers in 80 mix - 100% Percent short fibers in 80 mix - 0% Work habits - dirty worker height - 6 ft. Ventilations(fpa) #5 a. at front hood face 1,500 Double cavity machine FIBLD SAMPLE #12 Fiber count>5u/ml-1.46 Lab. No. - 1850 Loc,-Book preform #15 & Book preform #16 (both axe old exhaust design) Medical Study #3C-4418 Date - 10*1-74 Times ll*43am-2*01pm Sampling rate in liters per min .-1.9591 Air vol.(liters)-270.4 Avge.count/field-2.56 Mix used #15 - 133-9 Mix used #16 - 55ID-333 Percent long fibers in mix #133-1 - 26% Percent short fibers in mix 551D-333 - 74% Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 55ID-333 - 45% work habits - clean Worker height - 6 ft. Ventilation (fpm)#15 a. at top hood face 1,300 Ventilation (fpm) #16 a, at top hood face 1,200 SPNY 003292 FRICTION PRQDOCTfi GROUP S u rm Fiber count>5ji/ml - 1.54 Lab Ho. - 1851 Loo.-Book preform #13 (new exhaust design) & Book preform #9 (old exhaust design) Med. Study #30730 Date - 10-1-74 Timet lli45am-2*00pm Sampling rate in liters per min.-1.9591 Air vol.(liters) 264.5 Avgeeount/field-2.66 Mix used #13-55lD-333 Mix used #9-55lD-333 Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% work habits - dirty worker height - 5*6" Ventilation (fpm) #13 a. at weight scale slot face - 3*500 b. at front hood press face - 600 c. at side hood face- 300 Ventilation (fpm) #9 a. at top hood face 1*200 Fiber county5ja/ml-0.50 Lab. NO. - 1852 Loe. - Roll Machine #3 Med. Study #3C-767 Date - 10-2-74 Times 7i48am - lit07am sampling rate in liters per min.-1.9823 Air vol.(liters) 394.5 Avge.count/field-1.28 Mix used - 435-7 Wet mix Work habits-clean worker height-5'9" Ventilation - Hone Fiber counts$n/ml - 0.43 Lab No. - 1853 Loc.-Roll Machine #4 Med. Study #3C-4473 Date - 10-2-74 Timet 7i52am-lls04am Sampling rate in liters per min.-1.9591 Air vol(liters) 376.1 Avge,count/field-1.06 Mix used - 734-161 Wet mix Work habits - clean worker height 5'10" Ventilation - None SPNY 003283 FRICTION PRODUCTS GROUP APPEHDCC 1 PIBLD SAMPLE #16 Fiber count>5>i/ml-l .24 Lab Mo. - 1854 Loc.-Block preform #5 Had* Study #3C-4059 Date - 10-2-74 Timet 8t02am-10t54aa Sampling rate in liters per rain.-1.9591 Air vol.(liters)-337,0 Avge.count/field 2,76 Mix used - 551CSC Percent long fibers in mix 551CSC - 56% Percent short fibers in mix 551CSC - 44% work habits - dirty worker height - 6 ft. Ventilation (fpm) #5 a, at front hood face 1,500 (left) b. at front hood face 600 (right) Double cavity machine Fiber count*!jn/nl-0.97 Lab Mo. - 1855 Loo.-Block preform #17 Med. Study #3C-735 Date - 10-2-74 Timet 8t06am-10t59aja Sampling rate in liters per rain*-1.9823 Air vol.(liters) 342.9 Avge.count/field 2.15 Mix used - 693-555 Percent long fibers in min - 57% Percent short fibers in mix - 43% work habits - clean worker height - 6*1" Ventilation (fpm) #17 a. at front hood face 1,400 Single cavity machine fm&jim m MSL Fiber oouht>5/i/ml-0.74 Lab Mo. - 1856 Loc.-Block preform #17 Med. Study #3C-4059 Date - 10-2-74 Timet 10t54am-lt08 pm Sampling rate in liters per min.-1.9591 Air vol.(liters) 262.5 Avge.count/field 1.28 Mix used - 693-555 Percent long fibers in mix - 57% Percent short fibers in mix - 43% work habits - dirty worker height - 6 ft. Ventilation (fpm) #17 a. at frat hood face 1,400 Single cavity machine SPNY 003294 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA mM&&M TM gftMPftfi #19 FISM? SAMPLE #20 FIELD SAMPLE #21 Fiber eoimt>5ju/ml~1.15 Lab NO. - 1857 Loc.-Block preform #5 Med.Study #3C-735 Date - 10-2-74 Timas Ils02am-lsl0pn Sampling rate in liters per min.-1.9823 Air vol.(liters)-253,7 Avge.count/f ield-1.91 Mix used - 551CSC Percent long fibers in mix 551CSC - 56% Percent short fibers in mix 551CSC - 44% Work habits - clean Worker height - 6'1" Ventilation (pm) #5 a. at front hood face 1*500 (left b. at front hobd face 600 (right) Double cavity machine Fiber count>5u/ml-0.29 Lab. NO. - 1858 Loc.-Roll machine #3 Med. 8tudy #3C-4473 Date - 10-2-74 Times lls06am-l13pm Sampling rate in liters per min.-1.9823 Air vol.(liters)-251.8 Avge.count/field-048 Mix used - Wet mix 435*7 Percent long fibers in mix 435-7 - 0% (7) Percent short fibers in mix 435-7 - 100% (7) Worker habits - clean worker height - 5*10" Ventilation - None Fiber count>5u/ml-0.18 Lab No. - 1859 Loc.-Roll machine #4 Med. Study #3c-767 Date - 10-2-74 Times Ils08am-ltl2pm sampling rate in liters per min.-1.9591 Air vol.(liters)-242.9 Avgecount/field-0.28 Mix used - Wet mix 734-If Percent long fibers in mix 734-161 - 0% Percent short fibers in mix 734-161 - 100% Worker habits - clean Worker height - 5*9" Ventilation - None SPNY 003295 FRICTION PRODUCTS GROPP KIHCHESTER. VIRGINIA *gjnm FIELD SAMPLE #22 FIELD SAMPLE #23 Fiber count*5>i/ml-i .00 Lab HO. - I860 Loo. - Blank Date - 10-2-74 Fiber eount>iju/ml-2.02 Fiber count>$n/ml-2.38 Lab No. - 1861 Lab. Ho. - 1862 Loe.-Dias preform #3 Loe.-Block preform #11 Med. Study #3C-014 Med. Study #3C-168 Date - 10-3-74 Date - 10-3-74 Timet 8t28am-10t50am Timet 8t38am-10t48am Sampling rate in liters Sampling rate in liters per min.-1.9823 per min. - 1.9591 Air vol.(liters)-281.5 Air vol.(liters)-254.7 Agge.count/fidld-375 Avge.count/field-3.96 Mix used - 238 Mix used - 551-DSC Worker habits - d e a n Percent long fibers in Worker height - 5*10" mix 551-DSC - 55% Ventilation (fpm) #3 Percent short fibers in a. lower left side small mix 551-DSC - 45% hood at face. 2.700 work habits - dirty b. middle left side Worker height - 6 ft. small hood at face Double cavity machine 2.800 c. upper left side hopper exhaust at face - 600 d. lower right side small hood at faoe 2.800 e. middle right side small hood at face 2.500 upper right side hopper exhaust at face - 500 SPNY 003296 BO-CglO PROPOCTS G R O W Fiber eoant>^a/ml*1.75 Lab No. 1863 Loc.-Book preform #13 (new exhaust design) & Book preform #9 (old exhaust design) Med. Study #30-4418 Date - 10-3-74 Time 902am-10r52am Sampling rate in liters per min. - 1.9823 Air vol.(liters)-218.1 Avge.count/field-2SO Mix used #13-5510-333 Mix used #9 - 551D-333 Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% work habits - clean Worker height - 6 ft. Ventilation (fpm) #13 a. at weigh scale slot face - 4 000 b. at front hood press face - 600 c. at side hood face - 300 d. at rear hood face- 600 Ventilation (fpm) #9 a. at weigh scale slot face - 4000 b. at top front hood face - 2 100 sample taken without experimental enclosure in position. *FM>U #1 ireiaftfl JfAfTO* #?fi Fiber count>$u/ml-2.31 Lab NO. - 1864 Loc.-Book preform #12 & Book preform #16 (both are old exhaust designs) Med. Study # 30730 Date - 10-3-74 Times 9s06am-10s53am Sampling rate in liters per min.-1.9591 Air vol.(liters)-209.6 Avgecount/field-316 Mix used #12-551D--333 Mix used #16-47E Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% Percent long fibers in mix 47E - 100% (7) Percent short fibers in mix 47B - 0% (?) work habits - dirty worker height - 5'6" Ventilation (fpm) #12 a. at weigh scale 5 300 b. at top hood face 2 .2 0 0 Ventilation (fpm) #16 a. at weigh scale 4200 b. at top hood face - 2,300 Sample taken without experimental enclosure in position. r im W , #27 Fiber count>$u/ml-0.84 Lab. No. - 1865 Loc.-Book preform #13 (new exhaust design) & Book preform #9 (old exhaust design) Med. Study #3C-4418 Date - 10-3-74 Timas 12tl2pm-2s02pm Sampling rate in liters per min.-1.9591 Air vol.(liters)-213.5 Avgecount/field-116 Mix used #13--551D--333 Mix used #9 - 551D-333 Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% work habits - clean Worker height - 6 ft. Ventilation (fpm) #13 a. at weigh scale slot face - 4000 b. at front hood press face - 600 c. at side hood face - 3 d. at rear hood face - ( Ventilation (fpm) #9 a. at weigh scale slot face - 4#000 b. at top front hood face - 2100 Sample taken with the experimental enclosure in position. SPNY 003297 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA APPENDIX #1 FIELD SAMPLE #28 FIELD SAMPLE #29 Fiber c o u n t -1.31 Fiber count?$*i/ml-0.00 Lab NO. - 1866 Lab NO. - 1867 Loo.-Book preform #2 & Loc. - Blank Book preform #16 (both Date - 10-3-74 are old exhaust designs) Med. Study #3C-730 Date - 10-3-74 Timei 12*14pm-2s03pm Sampling rate in liters per rain.-1.9359 Air Vol.(liters)-211.0 Average count/field-1.79 Mix used #12-55lD-333 Mix used #16 - 47E Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551D-333 - 45% Percent long fibers in mix 47E - 100% (7) Percent short fibers in mix 47E-0% (7) work habits - Dirty Worker height - 5*6* Ventilation (fpm) #12 a. at weigh scale 5*300 b. at top hood face 2*200 ventilation (fpm) #16 a. at weigh scale 4*200 b. at top hood face - 2*300 Sample taken with the experimental enclosure in position. SPNY 003298 FRICTION PRODUCTS GROPP WINCHESTER. VIRGINIA APPENDIX #2 Sample No. Field ab Mix Used % Long Fibers in Mix % Short Fibers in Mix 1 1839 #55lD--333 5556 45% 2 1840 #133-9 25*) , 7454) . #5510-333 35*> 40* Av*e - 45* * . 3 1841 #80 mix 100% 0% 4 1842 #551C 56% 44% 5 1843 #672-124.. - 6 1844 Blank.... - , - 7 1845 mm -- -- 8 1846 -- - ? 1847 - - mm 10 1848 #5510-333 55% ... 45% 11 1849 #80 mix 100% 0% 3 12 1850 #133-9 #5510-333 4<* * '** Iti' 60* Avge. 13 1851 #55lD-333 55% 45% 14 1852 #435-7 wet mix Wet mix....... 15 1353 #734-161 wet mix Wet mix 16 1854 #551CSC 56% 44% 17 1855 #693-555 57% 43% IQ 1856 #693-555 57% 43% 1857 #551CSC 56% 4 4 % ...... 1858 #435-7... wet mix Wet mix .... 21 1859 #734-161 wat m i x ....... wet mix 2? 1860 Blank.... 2? 1861 #238 - - 2 1862 #551DSC 55% 45% .......... 2? 1863 #5510-333 55% 45% ....... 26 1864 #47E mm 27 1865 #5510-333 55% 28 1866 #55lD-333 55% ... 45% 45% #47E 2 1867 Blank - Fiber Count > Su/ml 1.46 1.75 4.10 1.73 1.20 0.00 2.99 0.60 1.11 1.68 3.59 . 1.46 1.54 0.50 0.43 1.24 0.97 0.74 1.15 0.29 0.18 0.00 2.02 2.38 .. 1.75 2.31 0.84 1.31 0.00 SPNY 003299 Sample n o . Field 1 1839 2 1840 3 1841 4 1842 5 1843 6 1844 7 1845 8 1846 9 1847 10 1848 11 1849 12 1850 13 1851 14 1852 15 1853 16 1854 17 1855 18 1856 19 1857 20 1858 21 1859 22 1860 23 1861 24 1862 25 1863 26 1864 27 1865 28 1866 29 1867 FRICTION PRODDCTS GROUP WINCHESTER, VIRGINIA im m u t i Medical Studv No. 3C-4418 3C-730 3C-4059 3C-735 3C-424 3C-2095 Poet 3C-727 3C-735 3C-4059 3C-4418 3C-730 3C-767 3C-4473 3C-4059 3C-735 3C-4059 3C-735 3C-4473 3C-767 3C-014 3C-163 3C-4418 3C-730 3C-4418 3C-730 - Work Habits Clean Dirty Dirty Clean Clean Blank Clean - Clean Clean Dirty Clean Dirty Clean Clean Dirty Clean Dirty Clean Clean Clean Blank Clean Dirty Clean Dirty Clean Dirty Blank Worker Height 6 ft. 5*6" 6 ft. 6*1* 5*8" - 6*1" - 6 ft. 6*1" 6 ft. 6 ft. 56W 5*9* 5*10H 6 ft. 6*1" 6 ft. 6*1" 5*10" 5*9" - 5*10" 6 ft. 6 ft. 5*6" 6 ft. 5*6" - Fiber Count >5n/ml 1.46 1.75 4.10 (80 mix) 1.73 1.20 0.00 2.99 0.60 1.11 1.68 3.59 (80 mix) 1.46 1.54 0.50 (wet mix) 0.43 (wet mix) 1.24 0.97 0.74 1.15 0.29 (wet mix) 0.18 (wet mix) 0.00 2.02 2.38 1.75 2.31 0.84 1.31 0.00 SPNY 003300 FRICTION. PRODUCTS GROUP WINCHESTER, VIRGINIA APPENDIX #4 Sample No. Medical Date Study No. Location Fiber Count > 5ju/ml 1 1839 10-1-74 3C-4418 1 1839 1 N Book preform #13 (new exhaust design) Book preform #9 (old exhaust design) 1.46 2 1640 10-1-74 3C-730 2 1840 M M Book preform #15 (old exhaust design) Book preform #16 (old exhaust design) 1.75 12 1850 10-1-74 3C-4418 12 1850 M <1 Book preform #15(Old exhaust design) Book preform #16(old exhaust design) 1.46 13 1851 10*1-74 3C-730 13 1851 n ft Book preform #13 (new exhaust design) Book preform # 9 (old exhaust design) 1.54 25 1863 10-3-74 3C-4418 25 1863 M 9 Book preform #13(new exhaust design) Book preform #9 (old exhaust design) Sample taken without experimental enclosure 1.75 26 1864 10=3-74 3C-730 26 1864 M Book preform #12(old exhaust design) Book preform #16 (old exhaust design) Sample taken without experimental enclosure 2.31 27 1865 10-3-74 3C-4418 27 1865 ft n Book preform #13 (new exhaust design) Book preform #9 (old exhaust design) Sample taken with experimental enclosure 0.84 28 1866 10-3-74 30730 28 1866 tl m Book preform #12(old exhaust design) Book preform #16(old exhausti design) Sample taken with experimental enclosure 1.31 SPNY 003301 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA APPENDIX #5 Sample No, Field Lab. Medical SSay. Hftt Location 3 1841 10-1-74 3C-4059 Block preform #5 (80 mix) double cavity 4 1842 10-1-74 3C-735 Block preform #17 (551C mix) single cavity 10 1848 10-1-74 3C-735 Block preform #10 (551D mix) single cavity 11 1849 10-1-74 3C-4059 Block preform #5 (80 mix) double cavity 16 1854 10-2-74 3C-4059 Block preform #5 (551CSC mix) double cavity 7 1855 10-2-74 3C-735 Block preform #17 (555 mix) single cavity 16 1856 10-2-74 3C-4059 Block preform #17 (555 mix) single cavity 19 1857 10-2-74 3C-735 Block preform #5 (551CSC mix) double cavity Fiber Count > 5n/ml 4.10 1.73 1.68 3.59 1.24 0.97 0.74 1.15 SPNY 003302 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA APPHflPX?C.i#6 fiflRRle, .N9t Bate Medical Sfegdy m * 14 1852 10-2-74 3C-767 15 1853 10-2-74 3C-4473 20 1858 10-2-74 3C-4473 21 1859 10-2-74 3C-767 Location noil Machine #3 (435-7 nix) wet nix No local exhaust ventilation Roll machine #4 (734-161 mix) wet mix No local exhaust ventilation Roll machine #3 (435-7 mix) wet mix No local exhaust ventilation Roll machine #4 (734-161 mix) wet mix No local exhaust ventilation Fiber Count ^>5n/ml 0.50 0.43 0.29 0.18 SPNY 003303 SKETCH#! BOOK PREFORM PKESEMT EUdoSatIE - ---Appmoti/iL eudoSuke ojooo) ----- WINCHESTER, VIRGINIA EMPLOYEE NAME MEDICAL STUDY NUMBER REFERENCE NAME Janes Morris Loring McDaniel Richard Keener T. L. Smeltzer Robert Dove Edward Woods Richard carpenter Gordon Miller Dennis voit Douglas Clark Thomas Kane MEDICAL STUDY NO. 3C-4418 3C-730 3C-4059 3C-735 3C-724 3C-2095 3C-727 3C-767 3C-4473 3C-014 3C-168 SPNY 003305