Document wDj48KQzv6qMGxZQY2bOv85N3
FILE NAME DuPont DUP DATE 1968 May 2
DOC DUP201
DOCUMENT DESCRIPTION Memo from S.E. Keuper RE Safety - Dust Control with Underlining Submitted as Plaintiff Exhibit
DU PONT NEMOURS & COMPANY
-AED
"
Lo. WILMINGTODNELAWARE 19793
canes a,
.
|
,
. ENGINEERING DEPARTMENT
BLASION DAKLAND CA.
Caybestos Caybestos
Manhatta
TheThefollowing procedure was issuedon April 1968 :
FieldFieldProject Managers | at its variousConstruction sites
SAFETY - DUST CONTROL
will fabrication _ In order to assure atmospheric conditions in insulation
_ shops which
not contribute to the employees health problems
ss when working with asbestos containing materials the Construc-
1968 control effective -, tion J
Division is initiating
program to be
the
following June 1
permanent
air
quality
.
Air Monitoring |
Se Oo,
ed poe oe any
established efficiency Environmental air monitoring shall be conducted to provide
tative data for site evaluation of dust control efficiency
assure conformance with established
Threshold Limit Values
quanti-
and
TLV
+d
1
The ThresholdLimit Value fortotal dust count shall be 500,000500,000 particles per cubic ft of aire
2
...
ofc,
Personnel monitoring will be conducted shops on site locations One employee to wear the air sampler one eight
in the insulation will be requested
day each month
3 . Trained site safety personnel shall be responsible for the
ae
control operation and adjustment of the air sampling
1i.nstrument recording required technical data associated
ue
with the air sample mailing of air sample to laboratory
;
.
for analysis and compiling records of analysis reports
participation 4 When soliciting
participation in the air monitoring prograpm rogram
craft supervision and Safety Engincer shouldanticipate who
will be involved in work which will produce the greatest aust
a . exposure for what day of that month
.
.
te
;
DETTER THINGS FOR BETTER LIVING .THROUGH CHEMISTRY
Air Monitoring Continued
Equipment Millipore The personnel air samplinginstrument used
UniversalUniversal Industrial Equipment
Co.
Model 440B qualified for explosion hazard
shall be a
filter areasareas air
sampler The filter used shall be an .8 micron pore
size Millipore plastic holder
sites where air
assigned be Cat No. MANG 037 AO
This equipment will
Type
assigned
MA
in
to
the
monitoring is required by the Division
Safety Office
filter filter in plastic holder upon completion of air
The sampling
the , shall be mailed by
site Safety Engineer
Morton Corn Ph.D. Graduate School of Public
Pittsburgh Pittsburgh Health University of Pittsburgh
Pennsylvania 15213
the
a
submitted Felix phase Stein
A
site and the
Slaefnegttyh fibers below
will be made
Division
5
micron
microscopy analysis
and a report
Office indicating
b fibers above
of
to
Reports indicating 5 micron length and c total number of particles total particle count to be ap-
proaching or above the TLV will require determining
cause of condition and taking corrective action to
reduce particle count After improvement has been
applied a second eight sample shall be con-
ducted analyzed and documented
*
Atmospheric Dust Control
-
Theapplication of the following recommendations should demonstrate
conformance with the established dust TLV and provide
dust effective emission control
a
Crocidolite shall Materials containing
asbestos fiber
not
bepurchased or accepted for use use Materials Materials containing
Chrysotile
for
and
Amosite
fibers asbestos
are
are
acceptable
The pressure sprayapplication of materials with any per cent
of asbestosasbestos fiber content shall be eliminateed liminated
All power tool and equipment operationsshall isolated
=
Seer
fromother shop facilities and fabricating
rn
.
AtmospDh usteCroni trc ol continued
4 All powershop equipment shall when operated operated have
exhaust ventila vet nti ilao tin on sufficient capacity
to remove dust particles at point of origin
Exhausted
ea dust particles shall be collected by an effective col-
. lector system which will not allow vent of dust
particles to the atmosphere
ae
.
.
J
sic. programs .5
oe
Present controlled shop cleanliness
shall be
expanded A vacuum cleaner should be used in lieu of
broom sweeping to remove dust particles from shop equipment work tables ledges floors etc. - .
>
Sr 8
6. A controlled materials hanhanddlinlg p inrgogram eliminato emission dist for example ".. _ when opening and removing materials from shipping
hoe.
cartons or in the handling and mixing of asbestos
cements -
.
-
-.:.* Respiratory Protection
ee
cs isolated conditions may require require that respiratory
ao) prote devc icet s i be v use ed Consideration should be made
ve for adequate protection of people in adjacent areas to the
oe
work location producing this condition Applied
respirator respirator respirator respirator manufactured manufactured manufctred by Mine
co in Appliance Co. Pittsburgh Par Dustige 77
yf g ilter
BM
21
should e32 f
eeeEMRE TARTS A
. Your usual cooperation is adminiis n t admeinrisi ten rig ng these
- dust controls
o
CONSTRUCTION DIVISION
. S K. E. Keuper
-
' Division Safety Superintendent
.
e