Document RgN6jV9wXx5dkyV80zR9mGgz
FILE NAME Corning OC
DATE 1969 Oct 30 DOC OC224
DOCUMENT DESCRIPTION Internal Report - Special Hazards Survey
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OWENS CORNING FIBERGLAS CORPORATION
BERLIN NEW JERSEY
October 30 1969
PURPOSE This visit was made to conduct our annual industrial hygiene survey to evaluate potential occupational health exposures in this plant
CONCLUSIONS A very definite exposure to duction areas of this plant Free silica present but not in amounts high enough to
asbestos arists throughout the prowhich is responsible for silicosis is be significant
CONTACTS The following persons were contacted P. Schouerle Plant Manager A. Courtier Personnel Supervisor and Safety Coordinator R. Grizio Production Manager D. Atkinson Plant Engineer and Miss F. Clift R.N. Plant Murse Mr. W. McKinney Manager of the Engineering Department of our Haddonfield New Jorney Office accompanied Mr. S. Wheeler and the writer on this survey
FROCEDURES Air samples for dust were collected by drawing air at the rate of
0.1 cubic feat per minute through midget impingers using distilled water es a
collecting medium The dust was counted on a light field as outlined in the
United States Public Health Service method for dust counting Samples of lodge
dust were collecteidn the ares of the air samples to determine the presence
of asbestos and free silica The presence of asbestos was demonstrated micro-
scopically using polarized light phase contrast microscopy
The presence of free silica was determined by _
RESULTS The results of our air samples are listed in Appendix A
CRITERIA In evaluating the results of air samples we use as guides threshold linit values which have been adopted by the American Conference of Governmental Industrial Hygienists The threshold limit values refer to airborne concOD trations of substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed day after day without adverss effects Because of wide variation of individual susceptibility exposure of an occasional individual at or even below the threshold limit valus my not prevent discomfort aggravation of a preexisting condition or occupational illness Threshold limit values should be used as guides in the control of health hazards and should not be regarded as fine lines between safe and dangerous conditions
Threshold Minits are based on the best available information from industrial
experience from experimental human and animal studies and when possible from
a combination of the three We feel that the threshold limit values are the best
guidance for the control of health exposures Of course when local State or Federal regulations set limits other than those of the threshold limit values then the strictest linits will have to be applied
oo
on
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vt Thecurrent threshold limit value for dust containing asbestos is five million
woh, copanrtticaleis npasr cuabsibcestfoosotregaTrhdelelsismitof isthesetamoon unttheoftaostbaelstaomsounptreosfendtust Thpere1s9e6n9t. a
revision of the threshold limit values has posted the threshold limit value for asbestos containing
particles e per cubic foot When a change is contemplated in
notice of that change is published for two years
in its list of intended changes
Sh dust of two million particles
the threshold limit valueis
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is After that time if there
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is no information to indicate that the revision should not take place then the
eT revised threshold lizit value becomes the permanent one Both of the limits :
eye cited above are based upon the standard impinger light field count technique
technique ame - which was used in part to cross the boundary between the current and thefibers
standard fibers i. - revised
An additional proposed threshold limit value is twelve
. of
ve 5 .tat
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a nr oe eP oe
De
ns,
TT
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fas: ot,
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par milliliter greater than five
membranere: filter mathod at 430 times phase
magnification | technique pot Nene used during this survey
microns in contrast
length
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determined by dviivbiediwngh aby re The threshold limit value for free silica is
as determined
This eee 2
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a
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by the
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250
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licit aux of the percentage of free silica present plus fire The threshold
licit : cant. erty value then will vary for each sample depending upon the percentage of fro
be hy =Tt a
which silica presant The threshold limit value for free
for
ee
listed in silica thesamples we collected is
with that sample
A. iS sgh orea
to free Aspipleincdsixpresetrnfte forsamplesaeth DISCUSSION Due
the low amount of
in our
above the threshold limit value with respect to free silics is considerably
results of our samples and above the threshold limit valus for asbestos con-
| taining dust Limiting concentration on dust exposures will
on the
based threshold lixit valpe for asbestos dust
ae a eee as
o
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OP: currenttahie: tg
y 2h
twelve the current threshold linit valne Of the
samples taken oight are above
and all are above the proposed threshold linit value Es conclude therefore
production that there is a generalised exposure to asbestos dust throughout the production
areas of this plant with the possibility of asbestosis
arising always present Employees monibetmo onr ite ord ed medically
exployi eest best To reduce the possibility of asbestosis arising in
cases
Ne leds eo
belly
o
it would be
production Jk
to control the environment in which they work This of coursceould be done
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by eliminating asbestos in the product itsalf We realize however that the
nature of the product my require the presence of cabostos to the decision on atye
eliminating it will have to be made on
the basis st and beyond the scope of cur survey
of product evaluation
is
ot
shies, Boren,4
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The second environmental control is to reduce the dust exposures in the air PAS,
- This can be done by the installation of exhaust ventilation designed in accordancs
with good industrial ventilation practice Good housekeeping is also essential ~ . _
in reducing the amount of dust During the surrey it was observed that the
sweeping machine was being operated in a rannar which did not allow for the mous
exposureoccurs from movemmt pickup of accumulated dust Part of the dust
of traffic over dusty floors
Fa
the
ST
ag
43 d5
Pe, .
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ese RECOMMENDATIONS RECOMMENDATIONS :
we yaar
epee
-ame
a OES ~~ A. exhaust gone to be sure A.
system wesrere
The
ventilation
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should be
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is operating
at at peak peak capacity capacity capacitcyapacity
airborne operating General dust
caused
houseke housekepinghousekeeping
caused
ping
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shoulvdehicle
bevehicle
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the decrease decrease the
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Industrial Edward B.
IndustriaIlndustrial
B.Hygienist Hygienist
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