Document Jrw8gLwZK7zeqmO0De5LMdxmB

"N o r w o o d " BRAND TO DUPLICATE THIS FOLDER ORDER B tbe-V & rm ckc NO. 81 Vs -MADE IN U. S . A. X N 14826 A fter thorough study o f d ata derived frost sample# obtained in th i# p la n t, th e fo llow ing s p e c if ic recommendsfclon a re rendei X* In a ie lla ti o f a p ro p e rly designed exhaust weubil&tfon ' system In th e misting, room o f ftniXding. Jt* 2* Jte^uirsessnfc that men wording in dusty freight #ar* w a r dust respirators* ' with regard to the f i r s t of thee#* i t i t im portant, i f sole dependence a placed upon the v e n tila tio n sysiess, th a t hood be properly placed r e la tiv e to editar and t h a t hood entrance velociti be oh as to in s u re e o lle c tio n o f a l l h ig h ly ooaesmtrabed d u st g iv en o f f by th e o p e r a tio n o f ch arging th e 1xo#*+ The appended b lu e p rin t thorn* lo c a tio n o f sassplins p o in t# in the mixing room and analyses o f the corresponding ample#* A c a re fu l study o f th ese d a ta should g iv e some id e a a s to th e p a r ts o f th e room where v e n tila tio n i s most needed* i t asset# a d v isa b le $6 lo c a te hoods n e a r each mixer in such a way th a t a l l d u s t g en erated by charging m ixers would be drawn in to the eye tea. and away from th e operators* I f i t proves to be im practical to do th is fo r all'.m ixers,' I t d e fin ite ly should be done fo r a l l those in which lead o r s i l i c a p a in ts are mixed and those p a in ts should never be mixed In o th er machines* In ad d itio n to hood# lo cated near the a ix e r , there should be exhaust v e n tila to r s lo cated in a l l p a r ts o f th e room whore dry d u sts a re s to re d and handled* Two such p la c e s a rc In d ic a te d on the drawing by samples number 23 and number k* I t may be s ta te d In H E 0013342 salatalm&ng low dust eoneeatratioiui la the taftrwaadlag air*. fh#r# is considerable difference between conditions in th# plant as a hols in *iam#r and the- In winter* a eempariteu of samples taken in tmmzmr (fuly) with those taken in winter i# tabulated in Table 1, taking average results of all- sample taken in the mining roe at each time xoept that samples taken near Ixers during opera tion of charging are omitted* 7m m i comparison of Average Duet Smmpltm T & km i n Mixing doom Susseer W inter ?f Inor@ae Dust C oncentration. D artioloe nor on. ft* I . 2S?,500 j L m j e s . Ihsik ________________________________________________ .,,Q Jija..... - ...... ............ These data are easily ae#em**t@d for by observation of ventilation conditions during the two rn trsm seasons of the year* In u M o r the plant is operated with Most windows open and natural ventilation give# rapid changes of air within the plant* I n winter th window are all closed and with a change of air occurring very seldom# concentration# of dust and other eentanlcuifite continually increase throughout the working day* This is particularly true of the most Minute particles which remain. In suspension Indefinitely# instead of settling out as do th# larger particles* Since these ' H!B 0013243 Sample .Ho*.. 1 2 . ^ w i v ' m s x ' .. toad Cone* Location.. ....... . .O..oe.r.at;.ion_-.......... Bartlcl/ou*ft * .ttj/10 evuM* Charging Sixer Mo# 6 for Mixing Hoorn faint Mo* 7& 2, Hollow Qloas a#t#S0O 0*165 j m $ * v.. .i r ..D... ........ Charging fixers 1 and 3 t o r Mixing Boom Faint !* 10 0 5 , High stand $, 81*0,00 1*53 -.ard*..lto.eif.ite..-.......... Hccelving ttaleadiag freight oar of 11 department leaded Z l m Oxide ao,ih3^m 3 5 .7 Beoelving tinloading freight car of 12 Department Titanium Oxide 1 2 ,0 5 5 ,2 0 0 2 .2 5 - Table XX ahoaa anelyses of four Maple* taken m t e unusual conditions# Samples 1 and 2 wore taken near niters during the charg** lug operation in susaier* The analyse show that the men engaged la these operations & m atifejeet to Jmuir&nui conoontrafelon of dust for th short tin required for barging the mixers, Continuous exposure to such concentration would oastifcube a daagerem* besard# However, tho chief elgnlfloan. of those data i s 'that it- la&loafee* the principal origin of hygienic dust la the wlxer room* namely the operation of charging the mixers with dry powdered materials* Samples 11 and 12 m m taken inside freight oars which were being emptied of leaded.elm oxide and titanium.oxide respectively# Both doors of each ear m m pea but neither m m ventilated by any artificial method* The materials ere contained la paper bags* The bags were moved by hand from the floors of the oars to skid upon K*r 0 0 1 3 3 4 4 '" an extreme exposure which definitely ehouid b* eliminated* Forfctmufeely such lead oofcnferafelona arc #fc only la m m leaded with dante who# land contant la tory-high* Those do not oeour oft enough to hair caused serious exposures of fell men %n the past , since it night be impractical to. attempt to vntilate tbs cars la a ay that would effectively eliminato the hasard, the use of respiratore has been previously and is again reeomeanded in the unloading of all freight cars containing powdered Materials, Table 1H contains.results of analyses of all samples taken in the plant* Those which arc- indicative of particular hasards have been discussed above* In general, it may be stated that all those which show lead concentrations below 1*0 milligram per 10 cubic meters and duet counts of leas than X#$OO#9O0 partile* per cubic foot indicate condition# that arc safe from those hazards, The dust count of 2,10^,000 shorn for the grinding m m la net a dangerous condition but 1 simply higher than normal due fee poor winter ventila** felon in that part of the plant* . . . The analyse of dust craping# from, the mixing room indicate that over a long period of time the lead content of atmospheric duet# in the mixing roost is about 2*7$ by weight*: ;This was determined by analysing for lead empita of ta duet- which he# settled over such '' t things a# pip near the celling and motor starter bofes on the walls* H 0013345 room whore so duofe i generated to soo If tins pormn&nt o w r a l l hasard a IX a fcbo looal aot# h&nt bato boon romovod. 0013340 Sample Ho* I Location D&t$ aoWtt Of . Found Sample .....ME- _ Mg. Pb par 1C0 C n.rt* bust Cosai Milli o f ---------- Mg. Pb pei P ertio le %. Fb b y 10 CuuX. nei Cu. F t. ... 1 UlxAniz Boom 4 .J r 2 3 -iO .. 15 ow.ffc. 0 .0 0 7 .......o A k t ... O.l ....... 2 .7 4 8 8 .... 2 Uixlwz. Hoo ' ..7 - 2 3 -4 0 . m o n . r u 0 .1 5 0 _ A .33S. .........1*530 . *S08 ..... 5 ...... f ix in g Moo _.7r23-li0. 55 a u .f t . . O.020 .......0 -3 7 7..... ........ 0 .1 3 0 .. . ____ 0 .9 5 0 S ... -...A ........ l i x i a s Moo 6 ' Roof Bli k .... M&ttttsnanoo 3 lia d a s Ro o m 9 M lxtm . loom '7-25-40- $0 cm*ft* 7-25-40 ' 7 -2 3 -4 0 .. s u .f t * 7-25*40 i uf t . . 7-23-itO 50 s o * f t. 0.072 1 .2 0 0 ____ 0 .4 2 0 .. .. 0.8132 0 .0 4 0.121 _ jM te L _ . - ...0*3032...... .O ...... 0*311....... .. 0*110 0.020 e#00$ Q jil 0.200 ..-..0 .1 5 0 ... .071 1.2300 Z A 500 0.7200 .- '' 10 B M u . &** 7 -2 4 -4 0 m .ft* 0 .0 4 0 .4 ? 0 .5 0 i 11 7-24-40 55 cu-fi*- 2O ....72*717........ ..-.25.70t;:... ...... .20,lj& > ... 12 F reist f a r . ? 2 4 50 o u . f i . 0 .1 9 0 ........ 4*323...... .......2 .2 5 0 13 Mixing Eoe 7-23-40 .500 ....1 * 5 S ... .. 14 : H ixinn Room . 7 ~ 2 3 4 - 1*3145 m * .. $o*ooo ...... k * k L 15 fix in g Rom 7 - 2 3 4 0 ..1,741 , . * s . ... 3$*000 16 Xlxlnft Rom 7-2 3 -4 0 . '. ^ S it* 2 8 *0 0 0 . ......1 .8 3 ... : .. 1?... Mixing Room 1-22-40 0.271 8* 10.000 .... 3*78__. & Mixing Room 1 2 -1 1 4 0 32.3 c u .f t . 0 .1$5 5 .0 7 ? ....... ^ 7 1 -- 8.7140 1 TABtS l i t ecmtimwtf %mplm & . fOestto kmmt of Sanalo 1% Psuod K#* % pe* XO00 Cu.ffe. &gm fl* p&T 10 C*SU Dtt# {vissai l l l l l Of fs iltls D*r 0* Ffe. % n> fey S e ic h t .- m ...... l l x i a i Sooai . ,12~XXii0 1*0.75 m uffe. 0*052 1.G5 . 0 .1 0 . '5 .0 lk 0 a& SixUufc ftoois - X 2 -H -4 0 M m muffe* 0 .0 3 2 1 *6 8 2 . . 0*65 ' 6*1700 JJH L ..._ M xiaj? tocs ' I.75 muffe* 0 .0 2 0 0.111. ' 0*15 . 5.2250 as mt&izm Oocni . x a - n - t o 52*5 muffe* 0.150 JuOOO . I io .y a o ,_3P_ _ -Oriaft&Bit ie o l a - u ^ o 52.5 m uffe. 0 .0 1 0 0*508 '. 0 .1 1 _ 2 .1 0 5 0 __ J t t ___ t * t O ' . X2--1-4.0 &5. muffe# 0 .0 7 2 1.107 ... 059 . . i * t o i CO * o CD O U 3C -./ve S to r a g e E '- --ii- i ~5ca/es 2 'Slairvr'ay 3z/e'safor' p , ''R R p )- S3 333 M xers M p u r a b e r e d ^ o h y j n d , S y LR . ,, c o r r e s p o n d i n g . ^ r n p j ^ - - M i x i n s R o o m , F i f t h 3c.a/e '-pr ~ ` -0 DUST SAMPLES Low Brother Company. - Dayto n , Ohio A n a ly sis Humber D escrip tio n U0C-2U Miring Room, B ld g, ii, Rost Center o f room kOC-2 5 Mixing Room, B ldg, !u Southwest Corner kOC~2& Mixing Room, B ldg, lu South Center o f room iiOC-2? .... Mixing Room. B ldg, lu Southeast Corner o f room ljOC-2 3 Mixing Room, B ldg, lu N ortheast Corner o f room jj.OC-2 9 Mixing Room, Bldg* lu Northwest Corner o f room ii.OC-5 0 l o s t End o f Grinding Room' -- near R o ll M ill itoc- 3 1 .. T est Room on West End o f S ix th F loor L iter Volume Air 920 1500 150 0 1500 920 'V . 920 920 I 8i;0 Pb Found .l r> 0 .0 5 2 0 .0 8 2 0 ,0 2 0 0 . 1*0 0 .1 9 0 0 .0 1 0 0 .0 7 2 Mg* Pb/ 10 Cu M. ........1 .7 9 .... o.ko ... . 0,S i_ _ . .. 0 .1 5 1 * 1 4 ___ _ 2 .11 0 .11 0-39 Samples Received: 12 -12*4 0 Samples Reported: l~344l m c*i oo *= **{ o o Ui X. Air and Past Samples fto m Plant of Loara Brothers Company t%yton Ohio Anal ysi s Kamber Poser l ot i on ?40C~X Ai r - Mi xi ng r eca - Mi g * k $f ch f l oor , near mi xer 6 t XOsoS - l Ot XJ a*. . k m~ z - Ef i i at _i 2 a2 .. . ......................................... x ....................... Ai r * Mi xi ng r mm - 14$* 4 * 5 t h f l oor , near M s s m 1 and 3 , 10 *2 3 - 10t ; 33 a* . Pai nt #1003 Qmn or M h. 25 t 849 L M. 1 Ph7............ r o md I i Pb . 10 CU. M Ot her % 0007| 0 *18 5 . Si +* 0. 13 I X- 55 0 1 4"$4- i t oe- 3 400- 4 4C~5 i i Oc- 7 Ai r - f i xi ng r asa - '&! $ ' ' 4 , $t h f l oor , l . w* cor ner of mi xi ng r &t m* near est si xer s i dl e 1052 * - Jl l l l &* &* ....,.....- .......... , ,, X T ,r______ Ai r - Mi xi ng, r oom - Bl dg* 4, 5 ^ f l oor , cent ar of si xer r oom near open bar r el # of pi gment , 12 *3 2 - L u * 52_m #.... ........................... ^ ................ , . . _ . . . Same as &0C- 4 except t aken I n chr ome- pl at ed sampl i ng t ab#. 12* 59 - 1 1 1 ? * . . . Ai r - r eef Bl %* & { Cont r ol Sampl e) X* 4l - l t5^. . . P*ffi *. . . . . .... Ai r - Mai nt enance Dept * near st one dr essi ng oper a t i on { l ocal exhaust hood) 13 Q0 L I 6f 3 L I 698 h 93d t I Zf k & i..........., . ,, , ......... ........................... ; ' 0 *0 2 1 0 *0 72 0 .0 6 0 *00lj. 0* 034 0 .13 0 4a 0 *3 5 0 . 0 !| 3 0 .11 Bemar ka Pai nt f 7$ 2 Ll t hopone 9 2 . 8$* * 10 * ?. 2$* , Mt hopone * 70$ SSaSC, , t . . . $&JSa4*: . . _. . . . . . . . . " . pai nt - . f l O}3 l eaded ni ne' 4 S & 20 $, s Kayo* *>$, Asbest i ne- jl; Kayox * 9 SJ* P30* { l mpur i t i e#, Ca and Ba sul phat es* i &he&t i ne si l l cl ous f i br eas par t i cl es a > 1 Gm& o r ffasiber Oe s e r ie ttm Telarne t CC- l J r-ttsfc * i i x i o -g 1^ % s id g# k 5 th f l o o r , tram ptp& 0*2(19 m & T m i li fg foafc frem fr tlK h t levatoi? 3Oaafc - <kub s l*$ o - , fresa f i o o r in S *l * c e n i * ' l :*54 s *0 0 15 r Poliit * a*s a ^0C - 5* ; from motor s t a r t e r &* f a r nlxwr 7# 8* rnd 9# 1.74 0* Basi w all OC-l s t * i & m a k 0 *13 frm me t e r -s ta r te r l>o3t . 1*7 0 JB a e o e s ita a l l ( w e s t) 1*0 0 17 inasti - asm a fresi s o to r s ta r te r box 0*27 $psi on n o rth w a l l 3 f e s t frem w&s&reeai coor MgS Pi Fctm d 6.50 60*00 3$.*0 a8 *o 10 *0 '3' f pfo 1*5 6 k-k7 2 ;*0 7 1*65 3.?0 10. Cw*. Otfcer Bessarfes Appro x. 5^ Sto , Recelved* 7 *2 3*1(0 Beportods 9 *1 5 - 1(8