Document DBO1pyYMORQw6ZgzB057mmon
teport on ut furvoy of Paint fanu.raotnrlnh Plant ofne hoe brother* -fp;r,pan y. . ay ton, nip
eoocnendations \ftr thorough study of data derived from sample* obtained
In this plant, the following specific roaomffiendation* are nadet 1, Installation of a properly assigned exhaust ventilation a petes* in the -slxing roo of building 4* 2, 'squlresaent that non working in dusty freight c*rs wear duet respirators, -*ifch regard to the first of those, it is Important, if sole
jeponcter.ee la placed upon the ventilation system, 'hat hood* be properly placed relative to mixer* and that hood entrance velocities bo srcrt us to insure collection of all highly concentrated dust*
van off by the operation of charging the mixers, "'he appended blueprint shows location of sampling points in the mixing rooa and analyses of the corresponding sample*. .< careful study of these data should give aoai# Idea as to the parts of the room snare ventila tion is most needed* it aeons advisable to locate hoods naar each "Ixor In sued a way that all boat generated by charging. mixers would d* drawn into the system and aeay rroa the operator*, if it proves to be inpr&otioal to do this for ull minors. It definitely should be done for all those in which lead or silica paints are mixed and those paints should never bo mixed In other machines.
In addition -to hoed* located ; ear .he mixer*, there siiOuld be exhaust ventilators located in all part* of thus room where dry fusts are stored unu handled. wo such places are indicated on the dreeing by samples nussber 28 and number 4, It :aay be stated in
N35518
"aterLais, sither op-onl;
tairud in paper nags, is potentially
a generator Jt h&xardrus host concentration* In tn surroundiiig Air.
inj -aarifi ox' collecting till a -:ufit at its source r.ay c-o it he v.ean* of
. saintniniruj low auut concentration* in the surrounding *ix*.
tj re 1 s considerable difference oetween condition# in the
pliUit us u Pinole In susier and these in winter. ..* comparison of
sanplt a t *v n i n susasor (duly) with those taken in sinter is tabula tad
In ~a'blo ', :ukin,f; average results of all saaple* taken, la the nixing
roosi at uacii li".s except that mxplos taken near sixers during opera-
tlon of arming are omitte vi.
o-pariaon of verude uat damply* aken in Mixing : oora
r------------------------------------------------------------------------------------------------- ,
....., ! . .
i"'jjwor ! tr:ter
increase
ust ' ncentraticn. Lead I'on cent, rat ion*
nartiolec per cu ng. per 10 cu* b,
i ft* j
i
|
l,dc3.S00 ;
0.19? i
5A2chAdOC..]
0.332 '
\2k
15$..... _________
base .i*ta are easily accounted for by observation vf
vancil^tion conditions '-.urio*! tne to extreme seasons of tns ... ear
In au-vs-^or the plant I a operated with nost windows npon and natural
ventilation gives rapid changes of air within the plant. hn alii ter
the windows are all closed and ml th a change of air occurring, very
aoldoa, concentrations of dust and other contaminants continually
Increase throughout the working day* This is particularly true of
ths oat raimite particles which remain in suspension indefinitely,
instead of settling, out as do the larger particles*
b-se
I 02259
Ar
small : Article8 do not settle. ;ke only means of -siiciinoting t'n.-isi la by ventilation.
'biili II ?sol *il amploa :'lowing .\cuce xpotare (July,- i'^O)
,ample i
<
Ho. ! Location 1
t
1'har-iins.t kixer Lo. o for
!
1 ! nixing hoocij Paint 'no. 7o2, fellow ;Iq s * j
11-.................--
I1 -- hlte
gLarging .tlxer 1 and 3 for 1
2 ! hixiiv: ;OC.-nj Paint bo. IOC J,
.btand- !
urti, 'took --hite
<
; .'.ecolving 1 Unloading freight car of
11 i ' apartment ; Leaden : ino -lxid
1
'sceiving j Hr leading freight car of 12 | Department | fltaniua Oxide
.ust count |
articlae/cu.ft1
I
2 , {~iO , oOO
'
i,-niiOtOCO
j
_ .............. ............... |
20,11*5,600
i
!
12,053,200
OliC t 2 */!0 :U. *
C.lbt
>
25.7 2.25
able II stoma analyse* of four aonplea vakon under unusual coiH-I L Lons. j ample* 1 And 2 were taken noa* nlxara during tu* charg ing operation in a.reefer. The analyse* aLow that the ui*n engaged in '.r.aa# operation* *ra subJeot to -'as&ruoua concentrations of dust for the 3norx, .-iia* required for charging " bo nixere. -lonfcismotMi cxpoaure* to ;mch concentrations would constitute * ^auigerous ;>a*ara. :o8Tp, the chief ;}i"Iounce of these -ate is chat it Indicate* trie principal origin cf hy<ji*nic Just in the ui;<r roon, uajraslp the operation of charging ike mixer* with ury powdered material*.
kwiplea 11 and 12 were taken inside freight tar* which were hoing emptied of loaded sine oxid# ana titanium oxide respectIvely, 'otb doors of oach. car were open but neither was ventilated oy any artificial ret had* he uxterial* were contained, in paper bag*. ;he bags were moved by hand froa the floor* of the care to skid* upon
^ I 02260
which they were noved and utoreb -until -ised, ;'he
required Tor
unloading a cor it approximately three hours dapending upon the
number <-f men yorking* . or that length of time, exposure to air con
taining d37 milligrams of particulate lead per ten c u d I a meters is
an extreme expe-sr-re wttloh definitely should. be eliminated* : ortunatoly such lead concentration# ere .-not only in ours loaded with uusts whose lead content i* very dish. Thee* ao not occur often enough to have
caused serious exposures of the men in the past* cine* it night bo impractical to attempt to ventilate tit*
care in a *ay that would effectively eliminate the hasaru, the use of respirators has been previously and is again recommended in the unloading of all freight cars containing powdered materials*
"able Til contain# results of analyses of ail samples taksn In the plant. Those which are indicative of .particular hasarda have been discussed above. In general, it may be stated that all those vhioh show lead concentrations below 1*0 minimum per 10 cubic meters and Oust counts or less than 1,300,QCO particles per cubic foot !nulouts condition* that ire safe frou those i-atarda* `be dust count of d, 103,000 shown for the .,r indin*; room 13 not a uaageroue condition cut is simply higher than normal due to poor winter ventila tion In that part of the plant*
Tiie analyses of dust scrapings from the mixing roots indicate that over a long period of time the lean content of atmospheric dusts in tho mixing room is about d*7'* by weight* This determined ty analysing for lead aampl s of the dust which nas settled over such things as pipes near the oeiliog and motor starter boxes on the walla*
t& i 02 Z o i
*
it is
o s t o .1 ..'.4C a iroronan i Inal ,,;.eo^c to
*ue on whatever rewtetilal .-oaaurea are taken to cllr.i;:to :..ie haat
iitisard fro?: ti;*js fiant. aaisplas eh air*hoi*ne trust should b taken
at the breathing point of uixer op`raters aiS also in parts of the
room arnorc- r.o oast ie ;.;# *** teci to * if
peroanant overall
hasard - *.*11 as i.he local acute hasard have been rosao-ved.
02262
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p 02264
mp s -.v j:v 4 u o o
u 'l.-M
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small particles do not settle, the only -oetn* of eliminating thorn ia by ventilation.
t abl e ii
dpaoial Samples Showing Houte exposure (July, 1 >1^0)
larapie TO, 1
2
11
Location fixing Hoorn
'fixing Ho o j r
receiving "department
Operation :barging fixer ho. ;> for Paint To. 752* hello* nloas , hi te . raxrging fixers 1 and $ for
Paint Ho. 1005* High stand ard, took tolte
Tnloading freight car of Laaued dine Oxide
usfc count Partioles/ou.ft.
2,?if6fdOO
6,31+0,000
20,1^5 ,600
Lead Cone, 'to./10 CU.H
Q.I65
1.53
25*7
deceiving
Unloading freight car of
12
Department
Titanium Oxide
12,053,200
2.25
Table II shows analyses of four samples taken unaer 'unusual cond Itions. dump lea 1 and sere taken near mixers during the charg ing operation in summer. The analyses show that toe men ensageu in these operations are subject to liaxardoue concentrations or aust for the short time required for clmrglng the mixers. Continuous exposures to such concentrations would constitute a dangerous hasard. However, toe chief significance of these data is that they indicate the principal origin of hygienic dust in the mixer room, .tamely the operation of charging toe mixers with dry powdered materials.
amples 11 and 12 were taken inside freight cars which were being emptied of leaded sine oxids and titanium oxide respectively, doth doors of each car were open but neither was ventilated by any artificial method. The materials vers contained in papsr bags. The bags were moved by hand frosi the floors of the cars to skids upon
whilob they were moved and stored until used, he time requiroti for unloading a car la approximately three hours depending upon the number of teen working* or that length of time, exposure to sir con taining 25*7 milligrams of particulate lead per ten cubic meters la an extreme exposure which definitely should be eliminated, fortunately such lead concentrations are met only in cars loaded with uuata whose lead content is very high. hose do not occur often enough to have caused serious exposures of the men in the past*
ince it might be impractical to attempt to ventilate the cars in a way that would effectively eliminate the -lasard, the use of respirators .as been previously and la again. rocosvsended 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 Towards 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 oust counts of less than 1,500,000 particles per cubic foot indicate conditions that are safe from those hazards. The duet count of 2,105,000 shown for the grinding room la not a cancerous condition but is simply higher than normal due to poor winter ventila tion in that part of the plant*
The analyses of dust scraplngo from the mixing room Indicate that over a long period of time the lead content of a into spheric dusts In the fixing room la about 2*7r> by weight, "his was determined by analyzing sewplaa of the dust which has settled over such things as pipes near the celling and motor starter boxes on the walls*
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