Document zbkeo2J0m93YJ78B080eKDE4m

FILE NAME: Z< DATE: DOC#: Z< DOCUMENT DESCRIPTION >Z>D/ZZ Z/ZZ//ZZZ '---: - . I ff:;. , ~ ./2 ~AbEi;(:CDrporation American Brakeblok Division WI~ClI[S;IR. \IIR:I~t1 22601 la, JD3-6.11671 .t..?=il 18, 195& !r.~t:s-:~:"=.:' ;:Y1i.:r.is~ :'oss ?;e\.a::-.-:i~r, J=:?art:r.er,t !.-i===-:;y >:c';ua:!. ~:-:su:-a~c~ ::!oopany ::::~~ "::::5-; ::::.:.a:>";e:l ..=!.ve:-.ua :iCa..~O.\~ I ;i:"=ginis 2-4205 I:1 =~':e=e:.ce -:;c y.o:.:.r hyg:!ene sU::-ley ta:(e.n at 0:::- pl41n"t on ~':..!,";tla.:-~r 23 anc .Ja...,u"ry 24, 1955, for <:ir"oor::e leaa 0:,:: as:)cs-:os .. -;:;:,e ::::.llo1."'l.r,a are co!'!'e c-:i ens and a.ctions that have taken :;>lace. ~:et.: =\li:~e:- gaske~i:::g is bei.'ti replacec on 'top of all no??ers ';[,e ::.::ea. .<.15u, d::s-:: "ieaks omm -:he sic.es near 'the ga-::es In -.;:.E: :"yp;:e:s are c:.lsc ";Jei..,g correc-::ec. !:'le a;'2::-atc: :..:; ceine .ins~ructeG ;10~ to open ~he w:':ldo'Ws in t:.e a.=ec: -;:;0 ==ea'~e G drz..::t. fie is alsc c.ei:lg i:\s~ruc~ad ~o O;Jen t~-:a c~~~ s:tell 0:-. -:~~e ".jC-:"UC::l of -:he :;.iA b\:g&y :'!i~i ~au-:io:\ .. not -to open f~lly al::' a-c c:\:!e, to keep f=c~ .:re:=t~i!".:; as ~~C:, c.;J$~ as ;055io12. ~lsQ,. ~hen o?e~ing t~e ~a~s of asbe5~os, ~e is ~o keep the bag '::>e~o\; the i:::;;aka i!uct so it '.,lill ::eceive as !:i:l::h dust as ~Dssi~le. 7h~s cuct is wO=King to i't;s ~~in~ capacity. Tr~s should be very effective fo!' t:1is area. KAZ 002916 ,'.r. ~eor;;;e ,,;. iIuckabra l.::::i1 13, JS6B P3ge 2 A , -7".:e . ~;;a:.e c..:.:.-.a..:.r1.V. sy~~e:1 ~ n _,.,.:,e ;-,:::p?e:::s (2 ~' r: ea:::..... l' , )::'S :'::::'-:C:'tlcn:.:-:g pr;);Je.l:y. Ti'..J.s vn.ll ce much nore e::iec"tive after tne gas~eti~g is i~sta11eQ. T~is C?era~io~ ~QS observed by plan;; e~gL~eeri~g ~~a ~yself a.....d ".:e fCll."\Q ;;ila intake c::Ci:ft sys~era t-lorking at its ;:;a:,;:i::u;:; c~p~city. ~ o~r first observa-:;io~ of this, ~hey ~era c~~?ing o~~ ..,;)si> c.usty~. All eus.... ~;as beir,g d!':'''m u;1 :;he in-:;a};e craft, e\'en t:,e c:.:s;; escaping fro~ c.e-;;-ween t~e :cn,re::: ';)car:ls in -c:.e :\~ix CiJg5Y. T~Le cay -:he su=vey \1a~ "tal(en lie feel ~h.e sa:tes on ;;ne c~t cc1lec~or could have ?ossibly bee~ partially closec . 0::: the :::c1~ec"or'nct ~orking at its oaxinun capaci'Y. ~O1.! is clea::- of c:us~ To.e area :0\1:: s<;"r:l;les r.w.oe; 12 SIlO 13 7he eus:; col:i.ectc; '\,as founc tc be \!orkL"\g at a?p;:-c:n:>tately ~lf of its ca?ac~~y. It has been corrected. \';e nave irl$~alled in -;:;;ie- rear oi eac~ ::::eform a canvas c~~ain ~D co~tai~ escs?ing dus.... from 6ewtL~s away f::on t:'e in~akc craft ~C ~eeFing it out of t~e general room air. This haS "'J:l:::~e:: very' effectively. On each pre;for:ll scale ..le have installed a!l intake dra:f"t tl!:e ert;erding f::cm the Ulai:l collector to collect dust .;hen the 0fzra";;G::- is 1,.I2igh!..ng t:'e I:tix. This aiiaL-:. t-rl.1l be very effective :0::- ~ha operators b;eat:Ling zone anc also the general area air. St.-vEeT: "Air oorne Lead" ant Your sample 13 under Air .,~-n"cer 4- is :Sorne Dust, -;;.,0. ansHe::ec unde::- par2.g~ap:l sanples nun'::Jer 12 is Your sample n'~be~ 11 ans~erec ~,cer sanp1es nunberE, 7, and 8 under Air ilo:ne Dust, paragraphs one ,and three. KAZ KHALl02917 002917 _~~.~ . .~~~_==:==-~~.:~~--7.,,:~_~.~~=-.~_~_~~.~.~,~~~.~_-_ _-~=~~'~"~~--~_-~-'-'~----~--------"-'_--~~-'--'--'--_-----'~'.--,-~-.-_--------------4_-.-_-_-~-.----------. . . :.:::. 3ec::-ge l!. :luckeb~~ A:::-il 15, 1~66 ?E.gC! 3 .. . -. ,,..., ..f....~~, ,..,... ,. ~ ~. _, J t~ ',.;e ce:.-tainlv feel -zr.a-z_'!;he,atovc. C~=:-ectiDns \,ill be very ..' .. ~ ..; # ,...... ' e::e:~ive in co~~ainingrcus~~inthe-va=iousc?e=auo=s breat~1i~g 2C!".e:i c..."1C ~~ gen\?::-a.l :-001:' air in the ef=ec:ted areas . .~' '1=~-I =?ay be of ~ly =u~:t7~:~~~~s~~:ce.t r.?lease feel ,free zo con"'Cact ~e. ~-. .... _.f.\...;. ;-:.. ~;.. .. _,t r,.. .. \, ~ ... .... - "~" J ~ .... :.'~3/c.r. ~obe!:'t G... 3rc".om ,~... . f ~e .rson.~~ 1.r;~age:" c'-""' .: C. : . .. .:; .', ..:/".. ;. l"'l ~o=c~e=~1ng,,~~. C. C. '31ack",iell, Jr. H.D. J. I:. Rer.n.ie G. A.. P.iley . C.. E. ::all o:-y C.- L. Clir'tis : ".. t . " "L t f .. , . _'. KAZ KHALL02918 002918 {v r. (J (J, : :'. ABEX CORPORATION AHERICAN BRAKEBLOK DIVISlm; ~/INCH:ES'l'ER, VIRGnUA Hygiene SUrvey for Lead and Asbestos On January 23 and 24, 1968, samples for airborne lead and asbestos dust vere collected iD the vet and dry compounding areas, in the book and the block press preforming areas and in the block and the strip finishing areas. The lead samples vere analyzed ,by our Hopkinton Laboratory and compared to a Threshold Limit Value of 0.2 Mg Pb/c.m. of air. The dust samples vere cOunted microscopically at 300X and compared to a Threshold Limit Value of 5 mppcf. CONCtuSlffilS: 1. Asbestos in Air: ifuile some of the dust counts are above the recommended level of 5 tnppcf for asbestos containing dust, examination of the samples under the microscope indicate' that only a fey of the particles counted are actually rihers and the other appears to be dust other than asbestos. Based on these observations I am not inclined to consider these leveia as hazardous aa suggested by the total count, but to tamper this judgment in viev of the fact that something 1esB than 10'; of the particles counted vere actually floors, Reference to the data sheet -.rill shov that the grinding operat~on8 appear to be ve11 controlled and the operations vbleh resulted in the higher dust count vere those which a large volume of air was displaced such as in the dumping operation, and in tbe strip preform area. - - - - - - - - - - LIBERTY MUTUAL INSURANCE COMPAl'iY- KHALL02919 , KAZ 002919 2. Lead Concentrations in Air: Reference to the data sheet vill shOll only tllO lIere above the recommended Threshold Limit Value . of 0.2 Hg/c.m. of ~ir . One of these \18.9 general room air collected near press #8 in the strip preform areaf in vie... of the other levels in this area and our observations, this is probably due to contamination of the filter paper aomevhere in the sampling and/or packaging technique. All other samples collected in this area vera ...ell belov this level and those 'collected in the breathing zone of the operator vere vell vithin the suggested Threehold Limit Value. The other high concentration of the airborne lead vas collected in the breat.h1ng zone of the operatOr dumping the scale hopper on the vet compound line. Our observation at the the time vas that a small plume of dust is released into this atmosphere vhen operation is conducted. Even considering tbe fact that this operation takes only ~ fe... miDutes about 10-15 times per shift. this Is still high enough to constitute a. significant'exposure and additional controls are varranted. . J. Exhaust Ventilation: With the exception of the strip pra- fonriing and the dumping .from the upper level to the lover level, the exhaust ventilation equipment appears to be providing adequate controls~ These tvo exceptions are probably due to the operation itself creating turbulent velocities in excess of the control velocities designed for these installations, and as a result dust is blolm out of the influence of the exhaUsted-environment. Even though the dust concentrations in these areas are not considered severely hazardous 1 they are higb enough to wrrant investigation into the feasibilityof either providing better enclosures and/or increased velocities for these operations. March 8, 1%8 mm/bm cc: Dr. C. C. Black'Jell, Jr. Mr. Charles Boreherding w.~ uckeba ~ Industria Hygienist Loss Prevention Department Liberty Mutual Insurance Company ----------lIBERTY MUTUAL INSURANCE COMPANY- KHALL02920 KAZ C02920 INDUSTRIAL H1G IENE CORREX:rIONS REQUIRED 1. Wet Compound Line - Hixer Exhaust: It is recomended that all. the mixers on the wet compound line be provided with an lnvard draft sufficient to control the puffs of dust vbich are released vhen dumping the veigbing hoppGr. 2. Strip Press Preforming and Dumping Locations on First Floor: It is recommended that the exhaust ventilation on these locations be improved eitber by increased velocity or improved enclosure to B, degree sufficient to control the puffs 'of dust emitted vhen operating the presses and dumping the material from the upper level to the ,lover level. KAZ KHALL02921 002921 DISCUSSION: On the days of. the Survey all operationsappear to be operating normally and for the mostpart the exhaust ventilating equipmemt appeared 'to be doing the job for vhich it vas intended. . As vas mentioned earlier 60me of the dust ooncentrations are a~ve the Threshold Limit'Value of 5 mppcf suggested for dust containing asbestos. Hovever, since som~thing les8 than l~ of the particles counted vera fibers, it is felt that the severity of the situation is not quite as serious as would be the case if all the particles vera fibers. . HA1JAGEMENT INTEREST: The interest of management and supervision in providing a healthful environment seems to be carrying over veIl to the individual employees. During our survey ve noted no evidence of ventilation equipment abuse or lack of respect on the part of the individual employees. Since the exhausting of air eontalnillants for this plant is such an important part of the operation, it is urged that continued emphasla be placed on quality maintenance and proper utilization of equipment provid, ed. KAZ KHALL02922 002922 ~ AIR BOR:;E ~ Method of Collection: Collected in distilled water with midget ilnpingers at the rate of 5 l/m. Method of Analysis! , . Counted vith microscope at 300X using a ' Spencer Hemacytometer Counting Chamber. asbestos! SAMPLE # 1. ' 2. 4. 5. 6. 7. 8. WCATION RESULTS IN MPPCF Bre~tblng zone of the operator 1.9 on automatic block chamfer grinder #810 - ~Jote: . The exhaust installation on the grinder appears to have a good invard draft t.l:iough enclosure might be improved to reduce 8.Dlount of . flying material. Same location. 2.3 Operator's breathing zone - rough grinder 3806. 2.6 Breathing zone of .the op~iator - autocatic block chamfer v-654. 4.0 Operator' B breathing zone - disc finishing operation #22 - machine #1209 - Note: The exhaust appears to be doing a very good job of dust control at this operation. 3.5 General room air in scale area veighiDg material for vet mix line. Little dust is apparent in the area. 7.8 Operator's breathing zone general . room air during the weighing of asbestos 'and emptying of the hopper for the wet line. 7.9 Operating breathing zone veightng asbestop and dumping for the vet line. 6.0 KAZ KHALL02923 002923 Data: (continued) 9. Dry line wlghing general :room air before velghiog asbestos. No dust apparent in the area. 10. Operator/s'breathing zone ueighing asbestos for dry line only, no other operations included in this sample. 11. General :room air on the groUDd level were the mills are dumped into the cart. Some dust noted to be escaping from the'enclosure during the filling of the cart. 12. Operator's breathing zone in the strip preform area.' Some dust seemed to be coming out of,the mole vhen the plate' Is placed on top of the filling. Nost of the dust appears to be the tap uhich is dueted on the moles. 13. General room in the strip preform area. 0.2 4.8 8.3 12.9 10.6 KAZ KHALL02924 002924 ~ AIR BORlJE LEAD l>fethod of, Collection: C,ollected on filter paper using vacUlJ!!l pump. Hetbod of Analysis: Dithiione method read on Beck:man spectrophotometer. Threshold Limit Value for air borne lead: 0.2 t-Ig./c. m. SANPLE il , 2. J. 5. 6. 7. 8. 9. 10. ll. 'WCATION RESULTS HgPb/c.m. Operator's breathing zone strip pre- form area mix #353. .01 Strip preform ,areS: preas #5 operator's breathing zone mix #154. .01 General room air' in back of press #6 in the strip preform area. .14 na General room air back or preBe in the strip preform area. .21 General room air vet line compounding. .12 Operator's breathing zone block grind- ing automatic bur and chB:mfer grinder. .14 General room air near dust collector room in block grinding areA. .02 Operator I s breathing zone in dry mix dump area on ground level - dumping mix at the 'time of sample. .10 General room air in dry mix dump area during dumping. .09 Operator's bresthblg zone vith vet line compound veigbing operation. .04 Operator's breathing zone during the dumping of the veighing hopper on the vet line .. Note: There Is no screen on this uWcer and a sina.ll puff of dust Is noted to be generated vhen first starting to empty the veighing hopper. 4.02 KHAl102925 KAZ 002925