Document LKbm9RM1omm581YNBa6wjpXwQ
FILE NAME: Asbestos Z>>
DATE:K DOC#: AC>
OCUMENT DESCRIPTIONhZZZZZ< D/ZZdZDD>
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- KINq MINE
ASBESTOS CORPORATION
Thetford Mines, Quebec, Can.
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A rechec~ survey of' the dust con6itions in the mill of this com:92!ly
l7as :nro.e .by the Industrie.l Hee.lth Section of the Metro?olitsn Lif~ InsuTence
Co;nps.ny on October 26, 1941~.
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A previous study h~d been ~ude in June, 1930.
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INST1T"HE OF OCCUPATIONAl. J.NO
ENVIRONMENTAL HEALTH
MONTREAL. CANADA
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No che.nges heve been mace in the ::.il1 OD":'rc tbns ;;~ nee the fi!'s ::ur-ley. The :mly effort at du!:"t sup:?rec~ion con::iste6. in cov'-'ring ~o:ne conveyor;:
The s~mples v;ere collected ~nd cne.lyzed '0;' t.he J7!ethod cevi~ed
(1)
e.nd used by the United St?tes Public Hee.lth .Eervice_ The failoring ta.ble shows the concentr~tions of dust found at
the time of this survey_
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(1) U.S. Public Heelth Service, Public He.s.lth Bl.11..1~tin #?1'7, Det~r;;;inf tio:1 ~nd C()ntrol of In:.'.1.1stri?1 Dust, J.J. Bloa?'1fi~lc ::n:: J .M. :C.s.ll,::,v?lle, 1935.
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Asbestos Corpor~Qll
Thetf~ Mines, Quebec, Can.
Sample
No.
Location
Date of
Sampling
Cu. Ft. Air
Sampled
'Millions of Dust Particles per cu. ft. air,
Type of
Dust
Remcrks
1
Crusher house,
10/26/44 15.0'
~icking belts on
primary crusher
2
Mill Bldg. 4th floor II
(fnns Dnd collectors)
20.0
1l.6
14.8
Asbestos Test made on spoci~c
t('l.lc
run of small quant-
ity of rQcJ,t. Clecr
dny. Nat full pro-
duction.
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II
Brick llulldtn[:"
vrroQdcn floors.
Windows open. Clepr
clf'Y'
3
Mill Bld2; 3rd floor II
fib)'t;:: screening
15.0
17.0
II
Wooden floor, 1'-io-
daws open. CIC'cr d[1;
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NIill Bldg. 2nd floor
rock zcreening
5 JMill BIde. l'st floor II bE.gEing
15.0 15.0
:'.6.6 18.1
II
.
Concrete floor,
windows ~:nd eloors
open. Clee.r d~y.
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Am9le toilet fc.cilities are pro'vided !'.nd ke::>t c1~en. Drinking T'.'t'ter is su:r?lied by bubbler type fount~tins. Hes.ted rooms or Cc.benc.5' are locr.ted on 3ac~ floor of the mill building.
COHCLUE IONS lillD. Ft.ECO;'.li'.1ENDATIONS
The concentrations of dust found at the time of this survey are much lower the.n those found in 1930. ThiE m&y be due to the mill not operfting to cCgecity and improvement in the housekeeping. Coverin~ of conveyor2 is, no .c')ubt, 2. contributing fs.ctor also. Pasn the ~C'-:rJlee --'?re k~en, the ,::inC'or:-s ',':"er
O.?Em and the day ViES clear. It is recommended th~t efforts be mwe to furt!1sr re:.'uce the cuc:t con(2)
centr;;.tions. .According to the UniteC: StEtes Pui:llic He.?lth 8~rvice, five :!lillion
of Esbestos dust
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. HP.:ALTH P.J~ZARDS
There core attached reprints of tv.-o Sbl0.ies which m:::y be of intel'e2t in
COILTJ.ection \'7ith the haze.rd of asbe::tos dust:
"Effect~ of the In.l-J.elEtion of Asbectos Dust on the Lun:zs of Asbestos ~orke~s"
IIAsbestosis"
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