Document r63Q8gyyN8KvDJ4O0G63jYBMJ
FILE NAME Talc TALC
DATE 1978-1980 1978-1980 DOC TALC485
DOCUMENT DESCRIPTION Memos by The Navy & M
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5137.1
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CONT ULE required
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0730 between R. Patterson SEA 0730
Code 185
of
NAVSHIPYDMARE
1978 1978
NAVSHIFYDNAFE PattersonPatterson
FONECON
NAVSHIFYDNAFE
Code 165
16 June
and E. Leveque Leveque
Ob xthe ape
Code NAVSHIFYDNAFENAVSHIFYDNAFE esicatif^rfl 1 Report 1
containing containing
esicatif^rfl
used Mare OS5A
Department Department
wet
yer survey facilitating
facilitating
conversation conversation findings .
Shipyard
reported
the
US e
findings
a
results results
survey enclosure
asbestiform
Tremolite Tremolite
Commander Commander
Mare Commander
ap
California
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0002- gry-TALC-0002
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- Reduction of aasbestossbestos ; 141
a
qualified products | ne
replacement products
|
- Set 116-78
:
|
26 June 1978 .
7 .
|
ent MEMORANDUM From Code 185 To . Code 500
OB
a
Be
an
eS
a,
ae
.
.
to Subj Tremolite Tremolite Tale Containing Asbestos Fibers
1 Naval Spditr from Commander Mare Island NavalShipyard
Encl - to Commander Naval SeaSystems Command of 20 Jun 1978Shipyard
a Enclosure 1 Identified subject in use at Mare Island Naval Shipyard
taken to reclaim talc containing asbestos -fibers for dis-
and procedures
oo
. posal while substituting asbestos asbestos talc
2. Request search ofprocurement documents and inventorylists pee,
locate
subject in
supply pointsShop
Stores at
Philadelphia Naval a
I
se
;
Shipyard
3. Notify Notify
-
Code185
ofstocking
locationsNLT20
July
1978.
|
encl Copy to w encl oo C. ode300 7
aa JosephJoseph W.
CRMC
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LABORATORY JEST REQUEST
12ND12ND MINSMINS 4730/19 REV 5-76
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CHEMISTRY LAR CODE
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CIMEI ae
OF MATERIAL
SCRIPTION
RADE
PLATE " 25-38 25-38
FORMY
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TESTING REQUIRED
METALLURGICAL PHYSICAL CHEMICAL |
COMFO^ MANCE EC OTMER
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COMFO^ MANCE TESTING IDENTIFICATION AS
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TTEESTSITNG INSTRUCTION WIN ASBESTOS
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NOASBESATOSBESTASOBESTREOPRSESENTED ASBESTOS REPRESENTED
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TEST TOLYUSE ONLT
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CEPOSITION OF SAMPLESS
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02
AUG 23 1978
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if
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6101C
Ser 55
oe
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Commander Naval Sas Systems Command
oo
FTroom Commander Mare Island Neval Shipyard -
30 MAY 1979
Te
.
Content of Magnesium silicate Raw Materials Used in Manu-
Subj Asbestos
Coatings
Fn eg
facture of 24441 Epoxy
Project Ref a MAVSEC
Order N6519779P090020
a
hoo as
1 It is requested that Mare Island Naval Shipyard NAVSKIPYD Mare
a 7
wie
;
evaluate magnesium silicate from
oo.
ay
"
ee 2. T. Vanderbilt Co.
Nytal 300
CS
Pfizer Co. Minerals & Pigments '20-30
.
| Desert Minerals Tale Co.
80 - s= Ss
Fine
|
a el
, a
fiber content
ee _
asbestos to determine
the major in 2. Although tremolite is
mineral fiber asbestos other min-
ampsite crecidolite anthoplylite and actino-
reported
eral fiTbheerssearfeibcehrsryasroelittoe be identified also and if present
lite
Ce
rns
oo
along with tremolite
paragraph of
one 1 shall also be
silicate The pigments 3. magnesium
In particular oil absorption should
svaluated
physically andchemically
and compared to the material
used
to
make
reformulated
MbTeIde-te2r4m44i1nemdaterials i.e. Pfizer Cp 20-30 magnesium silicate CT
me effort is within the scope of funding of reference a
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NAVSEA 05D23
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Prepared by John J. 6101C
Typed by L. Sendejo Hager May 1979
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DEPARTMENT OF THE NAVY
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MARE ISLAND NAVAL SHIPYARD
| YALLEO GALIFORNIA 34582
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IN RIFLY REFER TO
ee
134.05 Sex 376
.
9631
JAN 1980
a
From
To
Subj
Ref
Encl
Commander Mare Island Naval Shipyard
Commander Naval Sea Systems Command 05D21
Asbestos content of tale suitable for use in 24441 paint
a NAVSEA Itr 6101C 9631 Ser 55 of 30 May 1979
1 Project Proposal Evaluating the Airborne Asbestos Released by
Grinding Sanding and Blasting Asbestos Containing Paints
1 Reference a requested Mare Island Naval Shipyard to examine four tals for asbestos content and for comparability to the Pfizer Microtalc Cp 20-30 talc used to make reformulated 24441 paints
of 2. The asbestos content the tales was determined by microscopic analy-
on ais using dispersion staining : The oil absorptions are based data
reported by the National Paint and Coatings Association and by the tald suppliers The oil absorptions were determined according to ASTM 281 which has a reproducibility of + 25 The results are as follows
.
Source
Oil Absorption
Asbestos Content
Cyprus Mistron 139 .
7
.. 33
-
Slight amount of fibrous
-
tramolite in one of two
samples
Desert Minerals Talc Co.
Fine 80
re
Pfizer Microtalc CP 20-30
,
36
.
So
29
Large amounts of fibrous
-
tremolite present
, Slight amount of fibrous
_ tremolitien one of two
_ samples tested
R. T. Vanderbilt Nytal 300
29 7
Large amounts of fibrous |
tremolite anda small
aucunotf anthophyllite
present
of 30 The airborne dust asbesat sbeosts os in paint are unknown Asbestos
fibers that are tightly bound into a paint should not be a problem However when paints are removed by dust generating methods such as sanding or abrasive blasting asbestos fibers could be released Dried
paints are brittle and the shattering action of abrasive removal could
break the paint vehicle away from the asbestos and release the fibers
|
018553 018553
te Cc. Le 5
.
.
000203
134.05 376 _
the for use in 24441 paint
Asbestos content of talc suitable
Subj
in wide variety of paints
and is used
common paint ingredient
a
of asbestos while others
Talc is a
sold to the Navy
Some talcs are relatHievnecley firteeis safe to assume that all
contain from 20 to 60 asbestos
containing paints The poten-
may
are coated coated with asbestos
sanding
commissioned ships airborne asbestos particles durdinguring grinding
will
tial for generating
coated with asbestos containing paints
or abrasive blasting of ships coated
dried paint being removed
depend on the amount oifs asbessttaonsdaridn tanhaelyticalanalytical method for measuringasbtehestos
no
of airborne
Unfortunately there
and the actual amount of
asbestos content of dried paint of such paints is not known
released by surface preparation
asbestos particles during
4.
The potential problem problem of
generating airborne
the use of high
) prohibiting
surface preparation can be prevented by
and and b requiring use of
asbestos content talc in Navy formula paints
this approach will not
Navy
formula
paints
whenever practical However formulas such as those procured
under 490
measuring
methods for measuring
work for proprietary
Standard analytical
silicone topside paint
exist and there is no accepted limit
the asbestos content of paints do not Consequently there is no way to
for the asbestos contenotf paints
limitations for proprietary
establish and enforce practical asbestos
paints it is recommended that
5 Based on these observations
during the surface preparation
The airborne asbestor generated
2
be investigated investigated
Such
an
investigation
bigh asbestos contentcontent paints
asbestos dusting hazard posed by
to determine the airborne airborne
of known asbestos
have
surface
preparation
methodtso
remove
paints
develop
analytical
fteeraetnt A major part of such a task will b weet toand dry paints Enclosure
of determining the asbestos content
for
accomplish such a study
outlines a project to
139 Microtalc 24441 b. Approve Mistrom
and
CP2030 for use in
,
)
paints
has
trained
personnel and
equipment
needed
are
no 6. Mare Island Naval Shipyard
However technical personnel
accomplish the recommended task
this time The potential airborne
to
to the task at
should be
available for assigment
with asbestos containing paints
the
a asbestos problem associated
to support such project to
investigated
Mare Island is willing
such a task until
but cannot take the lead on
12 months for
fullest extent possible the project can be completed within Abatta
FY 81. It is estimated
75,000
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7 0
Abatta
Abatta
M.'L FITTMAN
By direction
os
000204