Document 85NXO6wdz8rV5jJpx81mbp6je

toport on dust Purvey o f Pain t hannfao th rln h Plan t o f n e h o e Prothar -!pa.ftany* a y t o n ;Uo e po rrye n d atlo n s h fte r tho ro ugh s tu d y o f d a ta d e rive d from apio o btain e d In t h i s p l a n t , f.he f o l l o w i n g s p e c i f i c ro a o rra e ra ia tio n s a re n a d e * 1* I n s t a l l a t i o n o f a p r o p e r ly d e s ig n e d e x h a u s t v e n t i l a t i o n s ys te m i n th e m ixin g room o f b u i ld i n g 4 * 2 , 's q u lr e s a e n t t h a t o n w o rkin g i n -m a ty f r e i g h t c a r s e a r bust re spirato rs* -*lth r e g a r d to th e f i r s t o f th o s e , i t l a i m p o r ta n t, i f s o l a i e p o n c te n e e .La p l a c e d u p o n t h e v e n t i l a t i o n s y s t e m , o b *t h o o d s b e p r o p e r l y p la c e t ! r e l a t i v e to m i x e r s arid t h a t h o o d e n t r a n c e v e l o c i t i e s bo such us to in s u re c o l l e c t i o n o f a l l h ig h ly c o n ce n tra te d d u e ts '.i ve n o f f b y th e o p e r a t i o n o f c h a r g i n g t h e m i x e r a * ''h e a p p e n d e d b l u e p r i n t chows l o c a t i o n o f aam plin.3 p o in t i n the f i x i n g room anti a n a l y s e o f t h e c o r r e s p o n d i n g s a m p le * . c a r e f u l s t u d y o f t h e s e d a ta s h o u ld g i v e some id e a ae to th e p a r t s oC th e room *;s r > v e n t i l a t i o n i s m ost iseeded* i t seem s a d v i a a b l e to l o c a t e hood n e a r e a ch ~ l x e r in s u e d a way t h a t a l l b u s t g e n e r a te d b y cnargiiu;. raixe ra would he -drawn i n t o th e s y s t e m an d a w a y f r o th e o p e r a t o r I f i t p r o v e s to be Im p r a c tic a l to do t h i s fo r u l l la ixo rs , i t d e f i n i t e l y s h o u ld be done fo r a l l th o s e in w hich le ad o r s i l i c a p a in ts are m ixed and t h e s e p a i n t s s h o u ld n e v e r bo m ix e d i n o c h e r -'iacn ir.e e In a d d i t i o n to hoed l o c a t e d ; e a r .he :-iix e r a , t h e r e s i i o u l d b e e x h a u s t v e n t i l a t o r l o c a t e d i n a l l p a r t s o f thus ro o m w h e r e d r y f u s t s a r e s t o r e d a n a h a n d l e d * Vwo s u c h p l a c e s a r e i n d i c a t e d o n t h e d ra w in g b y s am ple s nussbar 6 an d number g * I t / cay be s t a t e d i n I 02258 N35518  n e ral h . a t r y o pc pu t:. on : r v . 1 t . h;.; . &c i ;. :li a ;- o f u t r i a i s * >j ! t h a r o p u n i 7 ?>r c o n t a i n e d l a p a p e r is p o te n tiu iiy {.orat o r -T h &x a r d r i i e a o # t c e n c o n t r a t i o n a i n t i a a u r r o u n u I ,-?, * i r . i n y ans o c o l l e c t i n g t a l a m e t a t !. ta s o u r c e r a y co ha u e a n e o f n ain tn in irh ; low au a t co n ce n tra tio n in the s u rro un din g *i r . i'.tsr I s c o n s i d e r a b l e d i f f e r e n c e y e t * e n c o n d i t i o n # i n t h e p l i u i t a s a o b o l e In s teamer an d t h e s e i n w i n t e r . -,t c o w p a r i e o n o f o a a p ltra t .Ksn i n u s as o r ( d u l y ) w i t h t h o s e t a k e n i n i n t e r I s t a b u l a t e d In ~ a b l o r , '. a kiibt a v e r a g e r e s u l t <>C a l l *a p l s t a k e n i n th e .-n ixin g r o o s t a t u a c i i l i r*.o e x c e p t t h a t s a m p l e s t a k e n n e a r tr.ixe r# d u r i n g o p e r a t i o n o f c: <*r.:in-: a r e o m i t t e d . f o ^ p a r i a o n o f . v o r u o b u a t d a m p l y * '" k e n ir * M i x i n g o o o b -----------------------------------------r ' u jw sr v n tor i nat Le ad * n c e n t r a t i c n . for: c a n t r a t t o n , p a r ti o le g per ou, not. p e r 1 0 c u . M, 1 f t . j 1 ^ 43, 5 .0 0 1 J a ? c 9j 3 0 C I i | 0 ,1 9 5 0.332 ' Tn cr ea a a .. \ 2 L . ...... _______ he se .*ata aro asiiy uccountod for bj ubaervation vf voncliafcion condtione -.uria! tne tao extreia ssons o f tne ...ear in au%nsr th plant la operateti with c a s t win-.^ow open and naturai vantilution givo a rapiti changoa of a .Ir wifchin. tua plant. bu 'iutor th Windows ara all olooeo and ait a uhunre of alr occurrin.t very soldora, aoncentration oh .dust and othor contarcinant continuali? increata tnroughout th working day* Thia is partioularly irue o f fch oat raimito porticina whioti remato in ouaponaion indefinitely, instanti of aatfclin-r out ai do t h largar partici, esse -- f SlMll a r t i c l e s do r o t t y t t l u , ;b e o n i y by v e n tila tio n . e *m o r a l Ln i r . u t Inp. t i s a l a II je Lu i u rtp lo a bHowin^; .\ eufc . x p o a n ra ( Ou i*/ , i'jii+) ampie j Lo . 1 Lo ca tio n 1 i : u i x i n g boom 26m ` l x i v : ; c o n .'.e co iviiu 11 i ' opartve n t s c e ivino ..... . . . L be p artn e r, t ' - v .j - *^>* f ..ust oount J Lo a u c n c. 2 , Mai' t i c l a e / c u . f t ! :V, . / I O ; l i a r -Unss; M i x e r Lo . 3 r o r ! P a i n t ..0. 7o 2, v a l l o - i o * | 2,74 0 ,oo ; Cu li 5 n lte j \.La r g *; - x e i ' 1 ma p f o r 1 P a i n t Lo . 10C3* -ii rJti .` -tand- ! urti, to ck -h i te ; sii . o e o ; ! L'n l e a d i r u ; f r a i r b t c a r o f Le adea vin o Oxido : Q ,lL ,b Q Q i : 25.7 bnleaalng fr e ig h t car of Plte n itu a Oxide 12 ,0 5 3 ,2 0 0 ; 2.25 l a b i I I s h o * a n a l y s a s o f f o u r a o n p l a e "^ko n u n d e r -i n u s u a l i o n s , J*pl< > e 1 u n a Z r e t e k e n no a* n i x a r s d u r i n e t u c a * r j la.. o< e r u t Io n i n susecior Tb a n a l y s e s s ho w i i t th e rien e n;*je i i n or.saa o p e r a t i o n s a r o s u b J s o t t e -' s a r a o u a c o n c e n t r t , i o n o f dusfc T e r th u s u o r z -l i a * r e q u i r o u f o r snaur^in;; " ho i n o r o . Lo r.fcinuo ua o x p o a u r to :m cii c o n c e n t r a t i o n wcmlci c o n a t i t u t o a ^rfUi.Kreua .-'.a a r t i . :o w e v r , t b e cr.io i" a l . q n l f icu u io o f t h s r a t a i t afc i t i n d i c e i n e p r i n c i p a l o r l ^ n c f ':-.yjis n ie o u s t n Lhe u i x e r r o oe % r.tui;!::- ::) o p e r a t i l a o f charr/ .in,- o de m i x e r * J t a 0 1*7 p o w e o r e d M a t e r i a l s . *a a ?l e 11 an d 12 e r e ta k e n i n a i de f r p l r h t c a r h i e h e r e `ro inp. e r p t i e n o f l o a d o s i n o o x i d e an d t i t a n i u m o x i d e r a s p e o t l v e l y , `o t a d o o r s o f cucii, c a r ere o p e a b u t n e l i b e r a v e n t i l a t e l i o y a n y a r t i f i c i a l r e t h o d . h e r a t e r i a l e ro o o n t *i ned in papar La g , :h b aga e r e n o ve d b y hand froxs tfce f l o o r e o f th e c a r to s klcla opon ^ 1 02260 which they were novoa and utored -until used. i t tlx required Tor unloading a car is approximately three hour* iepending upon vhe number of men ;orkin?i. i o r t h a t length of tlr.e, exposure to air non such load concentration ere met only in oar loaded 1th uusts nose lead content i* very hl&h* The ao not occur often enough to have caused serious exposures of trie men in the past* inc* it night be impractical to attempt to ventilate tite c a r e in a ' a y t h a t w o u ld e f f e c t i v e l y e l l a l n u . t e th e h a s a r u , t h e u s e of r e s p i r a t o r s h a b e e n p r e v i o u s l y a n d I s a g a i n rco o rs m e n de d i n t h e u n l o a d i n g of a l l f r e i g h t c a r s c o n t a i n i n g p o w d e r e d m a t e r i a l s , "able T i l contains results of analyses o f ail samples t a k e n In the plant. Those which are indicative of particular hasarda have been discussed above. In general, it pay be stated that all those Kfrloh show lead concentration* below 1.0 milli/progs per 10 cubic 'cetera and Oust, counts ci less than l#y00,0C0 particles par cubic foot Tnuloate conditions that *re safe frou thos# ijssarda. 'ho dust count of 1,10 3,0 0 0 shown for the .rinding room Is not a cancerous condition cut is simply higher than r.orntal due to poor winter ventila tion in that part of the plant. Tiie a n a l y s e s of d u s t s c r a p i n g s fro m t h a m i x i n g ro o m i n d i c a t e t h a t o v e r a l o n g p e r i o d of ti m e t h e l e a n c o n t e n t o f a t m o s p h e r i c d u s t * i n t h o m i x i n g ro o m i s a b o u t d *7!i b y w e i g h t * Th i s a s d e t e r m i n e d h y a n a lys in g fo r le ad sam ple s o f th e d u s t which nas s e t t l e d o ve r such th in gs as pipe s near the o e llin g and motor s ta r te r bo xe s on th e w a lls . finally it i* suiv.eafca.i that a tnorou^h -final '..neck au* on whatever rernetiial icoaacrea ara taken to cllr.i::to :.ne huet hasard fx*055 t':ils plant. haoeplos ci' airt>oi*no uuat should b taken at the breathing point or uixer op-`ratera and also in parts or the room more no aast ie penerateci to is if -ha permanent overall hasard -a **11 as the le -oui acuta hasard have been roaso^ed. 02262 r*t j ]i1 K1 0 2' .,, inulpl I..JCi10* * ;.at 1 .. .w,.M of , !<: ; 1u i ................. ru ; oui.d r,t. * ^^ lCu **t 1 * * . . i i.. 20 Cu.i. J fX PtlKKSHW 2 Si I x 1 ;; ,.o o . lilxa,: 00 n ro On ...... k . ....... o -n Hixlnr; 0 O'n r i x l n f ..oo:... i.oof -lar. K 7 1 3 h.tki i. tfcUiiiCO Mxln.: ; 00'' 9 itxlr..-. 00: 10 M d/:. 3, . 0 1j M. ,, 7 - 4 - L ..... 30 o'ii.i t * i .GG7 ............0 .6 ? ................ . o a i o .. ........ ** *r O .I63 ________l ^ i Q 7 -4 -I Q 2 2.?.j`t,g ! G.ii2 V-M -h i.jO L U __ . G-G72 - O -.ili...... . O .13 O 1.2 0 0 .... 0 , L 0 _ .... - - i l L.rw......_ Q.uL 0 .12 1 0.W .3 7 - d i- L . .U5. v'a. t . O.Glli 0 .3 11 0 ,1 1 0 7~26" '.0 JM c u ( L. .. i- * - 1 u . je o i s . r t . . 7 - ^ - ', ... oO ' ili i t-# G. 020 O.OO6 Vf (w'UiVtJ{ 0 . 1.16 0 .20 0 0.0 j 7 ' n."1""5" 'H0TM ..... 0. 71 O.M3 11 i r e i , l bui' 12 rra J J M M r 7~2-, - it i Y - d `,-1 .0 7 `l , i ! *> e u . f l . 2 ., oO .....i" -*- i *7 .......1.7.Vk ... 0 . 2 2 0 ............ . M ............. 2.250 13 Ixil,- .OV: . it.1,12 .. . 6 . ;: o o IL `/ 1 X .- aO->. ' h i "lA j(J.wG 1 5 a 1 X * r** - -w >* 1 ...2...1..x. 1. t' U * ,r' V-I.,"O"..................^ M 17 1.V; X, IJ K2 1OO ' 1 U r 0*-4/X / M* . 3 u . Ouu 0 . 1 jvO 10.000 TV'Ml 111 conti. "aTplC r o . I.</C 11 on 2;> 'Mxrv; : oor? Z ?*i XJ.Or .... 2 1 ...... Tiixlnj* !o^n ?.n v i . y ' n - " '.''cor J _ '^rivr.irv'. 'cent 51 J ' Corn i i ; lito A-cxrit of r irnol fi rb OU'J r, K.'--l l - 'i.O O.0-75.. t* 0 . 0 ' } 1 2 - 1 1 4 ,0 i'0 .7 5 C.'5*f t# . 0 P . 12-21-J;0 W ? 5 - i . f t . 0.020 12-U -!0 2-H -4.0 12-114:0 C -I.ft. ,, P P 5 P l r M rt 0 .0 1 0 ' /r,>#> ' i. j i. 0 .0 7 2 'V")d r . f X lo v e r.-i ** t . ^ 0 * o pf/ 20 -''U . ; \ )at ccWifc "1111 on# o r Pft.' `v i o l 8 :'-'r ~vi, F t . ; n by "cibt I.O6 5 1 C j ;0 5.O3I1O 1 . 5 '!? ___ j __ 6. W O !*.COO o .io 1 . 5! 6 .2 2 3 0 o .ip 0 , ? 0*3 o .n 2.IO5O . ... i . 1 9 ' 0 1 1i "s i 1$ vi vo c\j (NJ O il s n i a l l p a r t i c l e s cio n o t s e t t l e , t h e o n l y ^ e a n s o f e l i m i n a t i n g thons i s by ve n tila tio n * TAfiU I I L*p e d a l Te m p l e s S h o e i n g P e ti te e x p o s u r e ( J u l y , l'/ v) .1a m p le To . 1 11 12 Lo catio n f i x i n g Hoom f i x i n g Hoorn receivin g T-e partae n t Op e ra tio n : b a r g i n g n i x e r L'o* 6 f o r P a i n t To * 7 J 2 , : e l l o w . l o s e v, h i t o , i i a r g i n g u i x e r s 1 a n d *5 f o r P a i n t ft* 1005 H igh Ttan ct arc!, to o k ihite Tn lo adin g fr e ig h t car o f Ls au e d Tin e Oxide H eeeivlng De partm e n t n lcadin g fre ig h t car o f Titan iu m Oxide u st count P artio le s/ o u .ft 2,?U &,OO 6 , 31+0,000 20, l h ej , ^ 0Q 12 ,0 5 3 ,2 0 0 Le a d Co n e * 'v,;,/10 CU*5$ 0 .16 5 1.55 5*1 2 .2 5 Table II shoes analyses of four sample taken unaer xmusual conditions* omaples 1 and ere taken near mixers during the charg* ing operation i n auiasner* The analyses shoe that the men e n g a g e a in these oprtlone are subject to hasardoue concentrations of oust for the short time required for charging the mixers* confcinuoue exposures t o such concentrations would constitute a dangerous hasard* JTowever, tne chief significance of these data is that they Indicate the principal o r i g i n of hygienic d u e t in the mixer room, namely the o p e r a t i o n o f charging the mixers with dry powdered materials* am ple s 11 and 12 w e re ta ke n i n s i d e f r e i g h t c a r s w h ich w ere b e i n g e m p ti e d o f l e a d e d s i n e o x i d e arid t i t a n i u m o x i d e r e s p e c t i v e l y * oth d o o r s o f e a c h c a r w e re o p e n b u t n e i t h e r w a s v e n t i l a t e d b y a n y a r t i f i c i a l re o th o d* The m a t e r i a l s w e re c o n t a i n e d i n p a p e r b a g s * The b a gs were moved by hand fr o th e f l o o r s o f th e c a re to s k i d s upon which they were .-noved and stored until used, he time required for unloading a car la approximately three hours depending upon the number of aen working* or that length of time, exposure to sir con taining 25*7 milligrams of particulate lead per ten cubic cetera la an extreme exposure which definitely should be eliminated* fortunately such lead concentrations are met only in cars loaded with uuafcs whose lead content is very high. heso do not occur often enough to have caused serious exposures of the r.en in the past* lines It might be impractical to attempt to ventilate the cars In a way that would effectively eliminate the -lazard, the use of respirators .as been previously and la again rooosvaended in the unloading of all freight oars containing powdered materials* Table III contains results of analyses of all samples taKen in the plant. Those which are Indicative of particular iiasards have beer, ulscussed above* In general, it may be stated that all those which show load concentrations below 1*0 milligram per 10 eublo meters and oust counts of less than 1,500,000 partioles per cubic foot indicate conditions that are safe from those hazards* The duet count of 2 ,10 5,0 0 0 shown for the grinding room la not a cancerous condition but Is simply higher than normal due to poor Inter ventila tion In that part of the plant* The analysee of dust ecraplngo from the mixing room Indicate that over a long period of time the lead content of atmospheric dusts :tn the fixing room la about 2*7g by weight* "hia was determined by analyzing sawplaa of the dust which has settled over such tilings as pipes near the celling and motor starter boxes on the walla* 1 02266 a t , f- / * . . * % > * c . - i {' t . .- I r v o brotberi C - ytotij Olilo An alyaia Nurober 1 0C-2. l OC-25 li.OC-26 liOC-27 ltOC-23 iiOC-29 li-OC-50 liOC-51 D e ce rip tio n M i r i n e DooiVi, B l d r . h , b o a t Co r. te r oX* rcoT. H i x l n ^ Ko ci. r l d r . L. Cc m tlm e a t Ce r n i r Mlx i n . i Tioor*.t ''Vld;'. li, foufcK Con t e r o r r o o n Wlxln s ; noo'/ i 'i l a -:. lt , :o n t h o u ;;t Co r n e r : .t r oa n i M l x l n r Doari, b l d r% ] ;, S o r t i e a r. t Co r n a r o f rootr. Wixin.? boom, rld ;"* .li, r o r t L ^ e s t Co r n e r o f rooip o s t End o f Grlm Un/ - .ionia -- r*eur E o l i Vi LI T e s t Boom o n -.est Kr.u o f D l x t h L i c e r Li t e r Voltine / .v 220 1500 1?0 0 1500 92C ..... .... 2 2 0 .... _.... .... . 220 13: 0 am pie e .>e o s i v e d i 12-12- o licu.ipl Ue po rte dx bo co o\ Am dysls ffuntber 'lOn -S Oe e o rtp fc io n d i r - r-'ixf ro cas , i I d g . Jj, 5 t i l f l o o r , ? > c o r n e r , P a i n i 595* 1106, end P 1113 spialo?; n e a rb y 2 l29 - 2tli5 r .n . una o r Vo l u n e 1353 L -2- rK ------ 7 ~ ~ Found f fb 10 c n . 0 .0 2 0 .15 Otbrr iOr-9 d -10 O'" 11 -32 A i r - ^ 'ix in * ro o m , r i d g . U, 5th flo o r, corner Z i k 7 - 21*37 p . n *. P a i r t 1106 lr - raae n sn t, bld g* 5* 2nd a s lo e st o f e le va t o r In p lrrn o n t to r/ .: ro o ri, 11*J | 0 - 12 tC0 a .*s . A i r - ' v o s i v ir io i p i : . , P l% . 3, In sid e fre ig h t c a r C u rin '- rsnloaciln/r o f lo ad ed sin e o x id o , 1:13 I s 2h p .m . Air -- ano as In side fre igh t car dnr- irs f .m loadin^ T10 fl, Is!i6 - 1*56 p . w . %9 L 16 0 3 1, 05! T. 0J|9 L 0 .0 0 6 O.OOJ 0 .19 0 .0 71 0 .0 23 25*7 2 .2 5 '. 1 *+ * ii P * P h tl le o P 70 J> h Pa ed U F ( nm fjoi* Jfwmber hG O lJ hOr~llf. 'jOr-15 ';0n-i6 'iOr- 17 res orlotion iniat ** f i x i n g room, ridg, k, 5^b floor, frost pipe near celling 6 foot from f r e i g h t elevator Lu* t - earn as Ifdc-ij, from floor In s*> . corn er rust - same as Ijdc-ij, from motor starter box for mixers 7* end 9# i'At wall L ust - earns a s fro* motor starter box on opposite &all (vest) lust - same as from motor 8tarter box on north wall JO feet from washroom door Gee or Volume 0 J+19 en 1.3^ m 1.7 h g * 1.70 m 0 .27 gm 3 5*g ?b rb7-- Found e > 10 Cn.M M o l.J/S 0.00 !t.U7 2.0 7 23 #0 10 .0 1.6 5 J .7 0 otter i I i'ppros. 3/ .Hto, , received! sported* Air ana Dust Samples fi'om Plant of Lowe Brothers nomn^my, "'yton, Oh A n a lys is Number bo c-i l|.0C~2 D e s crip tio n Air - Mixin g room - B ld g . 4 * 5 th f l o o r , n e a r m ixe r 6, 10 :0 8 - 10 :13 a.m . P a i n t 732 A i r - Mi x i n g room - Bldg. 4 , 5th flo o r, near m ixers 1 an d 3 , 10 ;2 3 - 10:33 a . m . P a i n t / TOC. ;} ` dms o r Vo l u m e 1(25 t 849 I ! Mgs Pb Pb/ Fo un d % Pb 10 Cu.M Other % 0 .0 0 7 0. 3^5 SI +++ 0 .13 1.93 S i ++T 4 oc-3 k o c-k IpOc-5 4o c -6 ljOc-7 A i r - M i x i n g ro o m - Bldg. 4 * 5 t h f l o o r , N.W. c o r n e r o f m ixin g room, n e a r e s t m i x e r s i d l e , 10 *5 2 11:10 a.m . Ai r - Mixin g room - b l d g . 4 5-h flo o r , ce n te r o f m ixe r room n e ar open b a r r e ls o f pigm e n t, 12 :3 2 - 12:52 p .m . Same as ij.OC-1* e x c e p t t a k e n In chro m e-plated sam pling t u b e , 12i 59 - 1*19 P.m . Air - roof Bldg. 4 ( Co n tro l Sample) l : 4l - 1: 5 2 p . m . Air - Maintenance De.pt. near stone dre s s in g opera tio n ( lo c a l exhaust hood) 1:59 ** 2 : l U p .m . 15 0 0 L I698 L 16 9 8 L 934 L 12 74 L 0 .0 2 0 .0 72 0 .0 6 0 .0 0 4 0 .0 14 0 .13 0 .42 0.35 0.043 0 .11 R P 0 L 3 P n H H j p i f 'An a lys is Number J| 0 c-8 D e s crip tio n Air - Mixin g room, Bld g, E* 5t h f l o o r , S . E . c o r n e r , P a i n t s # 3 9 5 , # 1106, and # 1113 m ixin g n e arby 2 i 29 - 2*1).5 p . m . Gma o r Vo l u m e 13 58 L -2- Mgs Pb Po un d $ Pb 10 Cu.M 0 .0 2 0 .15 Othe r % i f Oc - 9 I4.OC-IO i) OC-ll )|0C-12 Air - Mixin g room, Bid g. I)., 5^h f l o o r , S . E , c o r n e r 2 : E 7 - 2 : 5 7 p . m *Pa in t 1 110 6 Air - Basement, Bld g. 3 , 2nd a is le west o f e le va tp r in pigm ent sto rage room, l l i H o - 12 :0 0 a.m . Air - Receiving D ept., Bldg. 3, In side fre igh t car during unloading o f leaded zin c o xide , 1:13 1:21). p . m . A i r - same a s 1|.0C--l l , in s id e fr e ig h t car dur i n g u n lo a d in g TiOa , 1:E6 - 1:56 p .m . 8E9 L 16 9 8 L 95l* L 8)4.9 I* 0 .0 0 6 o .o o E 2 .E 0 .19 0 .0 71 0 .0 23 25.7 2 .2 5 Ti +++ R P H P 2 h t i o P 7 L h P e t P ( An a lys is Number I4 OC-I5 / OC-lij. l^ c -15 4 0 0 16 I4 OC-17 D e s crip tio n Dust - Mixin g room, Bld g, k* 5 th f l o o r , from pipe n e ar c e i l i n g 6 f e e t from fre igh t elevator D u s t - same aa It(5c - i 3, from flo o r in S .E. corn er D u s t - same a s ij.dc-13* from motor s t a r t e r box fo r m ixers J , 8 , and 9* East w all D u s t - same a s lj.OC-13, from m otor s t a r t e r box on o p p o s ite w a ll (west) D u s t - same a s I4.OC-I3* from motor s ta r te r box on n o rth w a ll 30 f e e t from washroom door Gms o r Vo lum e O.I4I.9 1.34 gm I.7/ 4. gm 1, 7 0 gm 0 . 2 7 gm Mgs Pb Po u n d % Pb 10 Cu.M Othe r 6.5O I.56 Ap p ro x. 5$ S iO a 60 .0 0 k - k l 36.O 2.0 7 28 .0 10 .0 I.6 5 3.70 R e c e i v e d : 7- 2J R e p o r t e d : 9- 15