Document V3JbEnrVNRz2vEdxyy48JZdRg

ABEX CORPORATION AN EVALUATION OP VARIOUS FACTORS INFLUENCING AIRBORNE ASBESTOS CONCENTRATIONS FRICTION PRODUCTS GROUP * WINCHESTER SEPTEMBER 30, 1974 - OCTOBER 4, 1974 ORIGINAL t CCS G. Nicholson C. C. Blackwell, Jr., M.D. A. A. Borin C. L. Broadstreet E. H. Feierabend D. Gidley C. B. Mallory D. K. Rennie F. E Tayler, Jr. J* P. Fagan - IC Industries SPNY 003283 ABEX CORPORATION AN EVALUATION OF VARIOUS FACTORS XNFLUBTCXNG AIRBORNE ASBESTOS CONCENTRATIONS FRICTION PRODUCTS GROUP - WINCHESTER SEPTEMBER 30, 1974 - OCTOBER 4, 1974 BMPS The purpose of this visit was to evaluate some of the factors associated with the manufacturing of various friction products in order to determine the effects of these factors upon the airborne asbestos concentrations associated with the processes, summary For the purposes of this study# the scope of this evaluation was essentially confined to three general locations! the book preformers, the block preformers# and the strip roll machines. Samples were taken in other locations# but the majority of the sampling occurred at these three locations. The variables that were considered during this stu$y were* the type of mix used and the fiber length of the asbestos associated with the specific mix# the height of the employees# the working habits of the employees (clean or dirty) # and the effect of additional experimental enclosures upon the airborne concentrations of asbestos. The results of this study indicate that the type of mix used# and the degree of enclosure significantly effects the airborne asbestos concentrations generated at the various preforming operations. The factors of employee height and the employee working habits were secondary factors# and by themselves did not significantly affect the airborne asbestos concentrations. Each of the variables investigated during this study will be summarily discussed in the following sections of this report. Various comparative appendices and a sketch are also attached. DISCUSSION Mix typet Using the comparative data gathered from the various mix types (see Appendix #2)# there are two trends that emerge. First# the wet mixes generate far less airborne asbestos at various preforming operations than the dry mixes. Second# the SPNY 003284 -1- nixes containing more of the longer asbestos fibers in their composition are associated with higher airborne asbestos con centrations* The mixes containing the longer asbestos fibers are generally lighter and fluffier than the mixes containing more of the shorter asbestos fibers. The lightness of the mix adds 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 #2, samples #14 & #15 and #20 & #21* These four samples were taken at two similar strip roll machines (#3 & #4). These two machines were sampled in the morning and in the afternoon on the same day* The only variable was that the operators switched machines in the afternoon. Both operators selected were about the same height, and both work very cleanly. The resulting airborne asbestos concentrations were as follows s strip roll machine #3 - (sample #14 0*50 fibers > 5/x/ml), strip roll machine #4 - (sample #15 0.43 fibers> $u/ml) # strip roll machine #3 (sample #20 0,29 fibers> 5u/ml), and strip roll machine #4 (sample #21 0*18 fibers >S/x/ml). The average of these four samples is 0.35 fibers >^ct/ml which is very low especially when there is no local exhaust ventilation provided at these machines* The wet mixes, by binding the asbestos fibers with the other components in the mix, generate very little airborne asbestos in the preforming stages* The length of the asbestos fibers used in the various mixes is also a significant factor related to airborne asbestos concentrations* Referring to Appendix #2 again, most of the mixes studied contained approximately 50% of the long fibered asbestos and 50% of the short fibered asbestos* The average fiber count computed for these mix types was about 1*5 fibers >5ju/xnl. This average figure can be compared with samples containing only the longer fibered asbestos. Samples #3 and #11 were such samples containing 100% of the longer asbestos fibers* The mix used for these two samples was 80 mix used in the block preform department. The results for these two samples were - (sample #3 4*10 fibers >$u/ml) and (sample #11 3.59 fibexs>3u/fal) * These results are approximately 2% times the average count associated with mixes containing equal amounts of the short and long fibered asbestos. Another comparative observation made was between the 80 mix results versus results taken at the same machine with the same operator but with another mix (mix 551CSC) This was sample #16 and the resulting concentration was 1*24 fibers SPNY 003285 -2- > $u/al almost 3 times less than the aisboxxie 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 fibered asbestos by the shorter flbered asbestos should be investigated* Heichti 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 two operatora 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 #30-4418 (6 ft* tall) worked on marines #9 and #13 (sample #1) in the morning and then machines #15 and #16 (sample #12 in the afternoon. His levels of exposure were identicals (sample #1-1*46 fibers >5u/ml) > (sample #12-1*46 fibers > $u/ml), His average exposure was 1,46 fibers Operator #3C-730 worked on machines #15 and #16 (sample #2) in the morning* and then on machines #9 and #13 (sample #13} in the afternoon* His levels of exposure weres (sample #21*75 fibers> 5ja/ml) * (sample #13-1.54 fibers >$n/ml). His average exposure was 1*64 fibers > $u/ml* These results indicate that the operator height is not an important factor in regards to employee exposure to airborne asbestos * Employee working Habits The type of working habits studied was associated with the 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 para meters* clean and dirty* were selected* clean meant that the -3 SPNY 003286 operator did not generate large amounts of duet as he worked and that he kept himself relatively clean for the operation involved* Dirty meant that the operator generated more duet than average and that hie 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 ^5u/ml (for 12 samples)* The average concentration for dirty operations was 1*61 fibers> 5o/ml (for 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 mixes containing approximately 505* 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* Experimental Enclosurei Four machines (#9. #13, #12. and #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* Samples #27 & #28 were taken at the same machines respectively after the additional enclosure was attached. The sample results are as follows s a sample #25 - 1*75 fibers >5u/ml (no additional enclosure), b sample #27 - 0.84 fibers > u/ml (with additional enclosure) e sample #26 - 2.31 fibers >$u/ml (no additional en- closure) d sample #28 - 1.31 fibers > $u/ml (with additional enclosure) These test results clearly indicate that the exposure levels were reduced in half as a result of the additional enclosure. -4- SPNY 003287 Conclusions i As a result of this study the following recommen dations are made* 1. At the book preform* block preform* disc preform and other areas where high airborne asbestos concentra tions have been detected* enclose the operations as much 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* X received excellent cooperation from Jeff Hicholson* Lloyd Broadstreat, Roger Dillon* Charlie Mallory, and Bob Brown* X thank them all for their assistance and courtesies* VISITED BY t 11/6/74 M. D* Gidlpy, C^ti^ied Industrial Hygienist -5SPNY 003288 friction g. hikcasm uaam. FIELD SAMPLE #1 PXJBbb SAMPLE J-3 Fiber count>5ji/ml-1.46 Lab No, - 1839 Loc.-Book Preform #13 (new exhaust design) & Book Preform #9 (Id exhaust design) Med. Study #30-4418 bate - 10-1-74 Times 8t55am-10t42am Sampling rate in liters per min, - 1,9591 Air vol.(liters)-209,6 Avge count/field-2.00 Mix used #13-55lD-333 Mix used #9-5510-333 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 - 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 eount>5p/ml-l,75 Lab NO. - 1840 Loc.-Book Preform #15 & Book Preform #16 (both are old exhaust design) Med. Study #30-730 bate - 10-1-74 Timet 9t00am-10t54am Sampling rate in liters per min, - 1.9823 Air vol,(liters)-226.0 Avgecount/field-2.58 Mix used #15-133-9 Mix used #16-551b-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*6M Ventilation (fpm) #15 a, at top hood face 1,300 Ventilation (fpm) #16 a, at top hood face 1,200 Fiber count>5>i/ml-4 ; 10 Lab No. - 1841 Loc.-Book Preform #5 Med. Study #3C-4059 Date - 10-1-74 Timet 9t21am-10t48am Sampling rate in liters per min.-l.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 (fptn) #5 a. at front hood face 1,500 (left) Double cavity machine SPNY 003289 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA Fiber count>$o/ml - 1.7r33 Lab NO. - 1842 Loc.-Block preform #17 Medical Study #30-735 Dates 10-1-74 Timet 9s27am-10:45am Sampling rate in literst per min.-1.9359 Air v0l.(liters)-151.O Avge.count/fitld-l.71 Mix used #17-551-0 Percent long fibers in mix 551-C - 56% Percent short fibers ini mix 551-C - 44% Work habits - clean worker height-611" Ventilation (fpm) a. at front hood face- 1.600 Single cavity machine rm Fiber oount>$u/ml - 1.20 Lab No. - 1843 Loc. - Disc brake preform #1 Med. Study #3C-424 Date - 10-1-74 Timas 9s34am-llt3lam Sampling rate in liters per min .-1.9823 Air vol.(liters)-232.0 Avge.count/field-182 Mix used -672-124 work habits - clean Worker height - 5*8" Ventilation (fpro) a. left side press area 1.200 b. right side press area 1.200 FIELD SAMPLE #6 Fiber count>5u/ml-0.00 Lab No. - 1844 Loc. - Blank Date - 10-1-74 SPNY 003290 APPBSDIX #1 FIELD SAMPLE #7 Fiber count >u/ml-2.99 Lab no. - 1845 Loc.-#2 line Blok O.D. grinder #SKA-442 #3 Mod. Study #30-2095 Date - 10-1-74 Tinas 9c39em-llt34aa Sampling rata in liters pax min.-1.9591 Air vol.(liters)-225.3 Avgecount/field-4.39 Stork habits - clean Worker baight-6'l" Ventilation (fpn) a. at wheel hood face 1*800 nap re Fiber oount>5>i/kl-0.60 Lab. no. - 1846 Loe.-Set on a post about 6 ft. from Field sample #7 Date - 10-1-74 Timet 9t41ast-llt37aa Sampling rate in liters per min.-1.9591 Air vol.(liters)-227.3 Avge.count/field-090 OEM. fiMgtt #9. Fiber count>5jo/fel-l.ll Lab BO. - 1847 Loc.HKill groove abb-w- 567 Had. Study #3C--727 Date - 10-1-74 Timet 9t43am-lls47am Sampling rate in liters per min. -1.9823 Air vol.(liters)-245.8 Avge.oount/field-179 Stork habits - clean Worker height - 6 ft. Ventilation (fpm) a. at wheel-hood face 1.800 SPNY 003291 FRICTION PIAW.1W 'S GROPP KEgBSBESL VIRGINIA m swm,us. Fiber count>5>i/l-l 68 Lab.No* - 1848 Loc.-Bloch preform #10 Med. Study #3C-735 Date - 10-1-74 Timet Ilt39am-lt55pm Sampling rate in liters per min.-l.9359 Air vol.(liters)263.3 Avge.count/field-289 Mix used - 5510 Percent long fibers in mix 5510-333 - 5596 Percent short fibers in mix 5510-333 - 4596 work habits - clean Worker height - 6*1" Ventilation (fpm)#10 a. at front hood face 1,600 Single cavity machine Fiber count>^u/ml-3.59 Lab. No. - 1849 Loc.-Block prefora #5 Med. Study #3C-4059 Date - 10-1-74 Time ill t41am-li57ptn Sampling rate in liters per. min.-1.9591 Air vol.(liters) 266.4 Avge.count/fiCld-630 Mix used - 80 mix Percent long fibers in 80 mix - 10096 Percent short fibers in 80 mix - 096 Work habits - dirty Worker height - 6 ft. ventilations (fpm) #5 a. at front hood face 1,500 Double cavity machine nm gflMfMS #1?, Fiber count?5*i/ml-1.46 Lab. No. - 1850 Loc.-Book preform #15 & Book preform #16 (both are old exhaust design) Medical Study #3C-4418 Date - 10-1-74 Timet llt43am-201pcn Sampling rate in liters per min.-1.9591 Air vol.(liters)-270.4 Avge count/field-256 Mix used #15 - 133-9 Mix used #16 - 551D-333 Percent long fibers in mix #133-1 - 2696 Percent short fibers in mix 551D-333 - 74# Percent long fibers in . mix 551D-333 - 5596 Percent short fibers in mix 551D-333 - 4596 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 FRICTIONPRODOOTS GROUP WINCHESTER. VIRGINIA APPENDIX #1 FIELD SAMPLE #13 T.tPW.PWPW #15. Fiber count>5pAil - 1.54 Lab Ho. - 1851 Loc.-Book preform #X3 (new exhaust design) & Book preform #9 (old exhaust design) Had. Study #30730 Date - 10-1-74 Times Ils45am-2s00pm Sampling rate in liters per min.-1.9591 Air vol.(liters) 264.5 Avgecount/field-2.66 Mix used #13-S5lD-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 (fpn) #13 a* at v^eight 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 count^$p/ml-0.50 Lab. NO. - 1852 Loc. - Roll Machine #3 Med. Study #3C-767 Date - 10-2-74 Times 7s48am - lit07am Sampling rate in liters per min. -1.9823 Air vol.(liters) 394.5 Avgecount/field-1.28 Mix used - 435-7 wet mix work habits-clean Worker height-5'9" Ventilation - Hone Fiber count>$u/ml * 0.43 Lab NO. - 1853 Loc.-Roll Machine #4 Med. Study #3C-4473 Date - 10-2-74 Times 7s52am-lls04am Sampling rate in liters per min.-1.9591 Air vol(liters) 376.1 Avge count/field-106 Mix used - 734-161 wet mix work habits - clean Worker height * 5*10" ventilation - None SPNY 003293 FRICTION PRODUCTS 6R0PP FIELD SAMPXJS_-#16_ Fiber count>5^/ml-1.24 Lab No. - 1854 Loc.-Block preform #5 Med* Study #3C-4059 Date - 10-2-74 Timet 8i02am-10t54am Sampling rate in liters per min* -1.9591 Air vol.(liters)-337*0 Avge.count/field 2*76 Mix used - 551CSC Percent long fibers in mix 551CSC - 56% Percent short fibers in mix 551CSC - 44% Work habits - dirty Worker height - 6 ft* ventilation (fpm) #5 a. at front hood face 1,500 (left) b. at front hood face 600 (right) Double cavity machine mma&jtk FIELD SWDBja,7- Fiber count>5ji/ml-0.97 Lab No* - 1855 Loc.-Block preform #17 Med* Study #3C-735 Date - 10-2-74 Timet 8t06am-10t59am Sampling rate in liters per min.-1.9023 Air vol*(liters) 342*9 Avge*count/fieId 2*15 Mix used - 693-555 Percent long fibers in min - 57% Percent short fibers in mix - 43% Work habits - clean worker height - 6*1" Ventilation (fpm) #17 a* at front hood face 1*400 Single cavity machine imLJtf&WL.}L Fiber oouHt>5ji/ml-0.74 Lab NO* - 1856 Loc.--Block preform #17 Med. 8tudy #3C-4059 Date - 10-2-74 Timet 10t54am-lt08 pm Sampling rate in liters per min*-1.9591 Air vol.(liters) 262*5 Avge.count/field 1*28 Mix used - 693-555 Percent long fibers in mix - 57% Percent short fibers in mix - 43% Work habits - dirty Worker height - 6 ft. Ventilation (fpm) #17 a. at frat hood face 1*400 Single cavity machine SPNY 003294 FRICTION PRODUCTS GRODP Fiber count>$ju/ml-1.15 Lab No. - 1857 Loc.-Block preform #5 Med.Study #3C-735 Date - 10-2-74 Times Ils02am-ltl0pm Sampling rate in liters per min.-1.9823 Air vol.(liters)-253.7 Avgecount/field-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 (fpm) #5 a. at front hood face 1*500 (left b* at front hoOd face 600 (right) Double cavity machine FIELDlSBMM *21 Fiber count>5n/ml-0.29 Lab. NO. - 1858 Loc. -Roll machine #3 Mad. Study #3C-4473 Date - 10-2-74 Timas 11x 06am-l<13pm Sampling rate in liters per min.-1.9823 Air vol.(liters)-251.8 Avge count/fieId-0 48 Mix used -* Wot mix 435*7 Percent long fibers in mix 435-7 - 0% (?) Percent short fibers in mix 435-7 - 100% (?) worker habits - clean worker height - 5'10** Ventilation - None Fiber count>5u/ml-0.18 Lab No. - 1659 Loc.-Roll machine #4 Ked. Study #3c-767 Date - 10-2-74 Timet Ilt08am-ltl2pm sampling rate in liters per min.-1.9591 Air vol.(liters)-242.9 Avgecount/field-0.28 Mix used - Wet mix 734-1' 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 SPNV 003295 ffXNCHESTBR.VTRQIfflA APPENDIX #1 FIELD SAMPLE #22 Fiber counts5>i/ml-< 00 Lab No. - 1860 LOO. - Blank Date - 10-2-74 MML*mn ,,& Fiber count>^u/ml-2.02 Fiber count>$u/ml-2.38 Lab No. - 1861 Lab. No. - 1662 Loc.-Dieapreform #3 Loc.-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 pec min. - 1.9591 Air vol.(liters)-281.5 Air vol.(liters)-254.7 Agge.count/fiAld-3.75 Avge.count/field-3.96 Mix used - 238 Mix used - 551-DSC worker habits - clean 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 face 2#800 e. middle right side small hood at face 2,500 f. upper right side hopper exhaust at face - 500 SPNY 003296 FRXCTIOK PRQPqCTB GROW WISCHESTBR. VXRfflCKlA ***** S&MM *25 Fiber count>^u/ml-l.75 Lab Ho* - 1863 Loc.-Book preform #13 (new exhaust design) & Book preform #9 (old exhaust design) Med. Study #3C-4418 Late - 10-3-74 Timet 9s02am-10*52au Sampling rate in liters per min* - 1*9823 Air vol*(liters)-218.1 Avgecount/field-2 *50 Mix used #13-5510-333 Mix used #9 - 551D-333 Percent long fibers in mix 551D-333 - 55% Percent short fibers in mix 551L-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 e* at side hood face - 300 d at rear hood face- 600 Ventilation (fpm) #9 a. at weigh scale slot face - 4.000 b* at top front hood face - 2,100 sample taken without experimental enclosure in position* gM^mJ2.6 gjBML^IgaS^?J. Fiber count >u/ml-2.31 Lab Ho. - 1864 Loc.-Book preform #12 & Book preform #16 (both are old exhaust designs) Med. Study #3C-730 Late - 10-3-74 Timet 9t06am-10t53am Sampling rate in liters per min.-1.9591 Air vol.(liters)-209.6 Avgecount/field-316 Mix used #12-55lL-333 Mix used #16-47E Percent long fibers in mix 551L-333 - 55% Percent short fibers in mix 551L-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 2,200 Ventilation (fpm) #16 a. at weigh scale 4,200 b. at top hood face - 2,300 Sample taken without experimental enclosure in position. Fiber count>$u/ml-0.84 Lab. Ho. - 1865 Loc.-Book preform #13 (new exhaust design) & Book preform #9 (old exhaust design) Med. Study #3C-4418 Late - 10-3-74 Timet 12tl2pm-2s02pm Sampling rate in liters per min. -1.9591 Air vol.(liters)-213.5 Avgecount/field-116 Mix used #!3-55lL-333 Mix used #9 -- 551L-333 Percent long fibers in mix 551L-333 - 55% Percent short fibers in mix 551L-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 - 3 d. at rear hood face - Ventilation (fpm) #9 a. at weigh scale slot face - 4,000 b. at top front hood face - 2,100 Sample taken with the experimental enclosure in position. SPNY 003297 FRICTION PRODUCTS GROPP APPENDIX #1 FIELD SAMPLE #28 PTEtn fiAMPue Fiber count>5ji/ml-1.31 Fiber eount?5n/ml-0.00 Lab No. - 1866 Lab No. - 1867 Loo.-Book preform #2 & ZiOc. - Blank Book preform #16 (both Date - 10-3-74 are old exhaust designs) Med. Study #3C-730 Date - 10-3-74 Timei 12tl4pm-2t03pn Sampling rate in liters per min.-l.9359 Air Vol.(liters)-211.0 Average count/field-1.79 Mix used #12-5510-333 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% (?) Percent short fibers in mix 47E-0% (?) work habits - Dirty worker height - 5*6" Ventilation (fpn) #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 GROUP WINCHBST^.VIRgXNIA APPENDIX #2 Sample Mo. Field Lab. Mix Used * Long Fibers in Mix * Short Fibers in Mix 1 2 3 4 5 6 7 8 ? 10 11 12 15 16 17 18 ?9 21 2? 2? ?4 2? *6 27 28 9_ 1839 #55lD-333 1840 #133-9 #5510-333 1841 #80 mix 1842 #551C 1843 .#672-124 1844 Blank 1845 1846 1847 -- - 1848 #5510-333 1849 #80 mix 1850 #133-9 #5510-333 1851 #5510--333 1852 #435-7 1353 #734-161 1854 #551CSC 1855 #693-555 1856 #693-555 1857 #551CSC 1858 #435-7 1859 #734-161 1860 Blank 1861 #238 1862 #55lDSC 1863 #5510-333 1864 #47B 1865 #5510-333 1866 #5510-333 #47E 1867 Blank 55* 26*) . 55*) 4056 AV*6* 100* 56* -- -- - 55* 100* ?** -- 55* Met mix Wet mix 56* 57* 57* 56* wet mix wet mix 55* 55* 55* 55* - 45* 74*) 45*) 0* 44* AwtA 60* Avge* -- *-- - 45* 0* 24*) 45* k 60* Avge. 45* Wet mix Wet mix 44* 43* 43* 44* Wet mix wet mix - 45* 45* 45* 45* 4m Fiber Count > 5u/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 No. Field 1 1839 2 1340 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 PRODUCTS GROUP WINCHESTER ,__VI_Ig5XNXA mwm. #? Medical Study No. 3C-4418 3C-730 3C-4059 3C-735 3C-424 - 3C-2095 Post 3C-727 3C-735 3C-4059 3C-4416 3C-730 3C-767 3C-4473 3C-4059 3C-735 3C-4059 3C-735 3C-4473 3C-767 - 3C-014 3C-168 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 Heicrht 6 ft. 5*6" 6 ft. 6*1* 5*8" 6 *1" - 6 ft. 6*1" 6 ft. 6 ft. 5*6" 5*9" 5*10" 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 nix) 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 SINISTER, VIRGINIA APPENDIX #4 Sample No. Field Lab. Date Medical study so. Location Fiber Count _> 5n/ml __ 1 1839 10-1-74 3C-4418 1 1839 n M Book preform #13 (new exhaust design) Book preform #9 (old exhaust design) 1.46 2 1840 10-1-74 3C-730 2 1840 M N Book preform #15 (old eaAaust design) Book preform #16 (old exhaust design) 1.75 12 1850 10*1-74 3C-4418 12 1850 * Book preform #15(61d exhaust design) Book preform #16 (old exhaust design) 1.46 13 1851 10*1-74 3C-730 13 1851 M H Book preform #13 (new exhaust design) Book preform #9 (old exhaust design) 1.54 25 1863 10-3-74 3C-4418 25 1863 M n 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 ii w 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 * 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 3C-730 28 1866 it m Book preform #12(old exhaust design) Book preform #16 (old exhSust- design) Sample taken with experimental enclosure 1.31 SPNV 003301 FRICTION PRODUCTS GROUP WINCHESTER. VIRGINIA APPENDIX #5 Sample Ho. Pate Medical Study So. 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-4G59 Block preform #5 (551CSC mix) double cavity 17 1855 10-2-74 3C-735 Block preform #17 (555 mix) singlecavity 18 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 > 5p/ml 4.10 1.73 1.68 3.59 1.24 0.97 0.74 1.15 SPNY 003302 FRICTION PRODUCTg-flMBE WINCHESTER. VIRGINIA APPENDIX #6_ Sample No. Field Lab. Date Medical Study No. Location 14 1852 10-2-74 3C-767 Roll Machine #3 (435-7 mix) wet mix No local exhaust ventilation 15 1853 10-2-74 3C-4473 Roll machine #4 (734-161 mix) wet mix No local exhaust ventilation 20 1858 10-2-74 3C-4473 Roll machine #3 (435-7 mix) wet mix No local exhaust ventilation 21 1859 10-2-74 3C-767 Roll machine #4 (734-161 mix) wet mix No local exhaust ventilation Fiber Count ^Sn/ml 0*50 0*43 0.29 0.18 SPNY 003303 SKETCH#1 BOOK PREFORM PRESENT EUClOSvAG - --------aopitiohal eutbsune twouc) =---------- WINCHBSTER,_yXROINIA EMPLOYEE NAME MEDICAL SgUDY NUMBER REFERENCE NAME James Morris Loring McDaniel Richard Keener T. L. Smeltzer Robert Dove Edward woods Richard Carpenter Gordon Miller Dennis Voit Doaglas 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