Document KRxzx8Qqze496YZmzzm1gYL8o
FILE NAME: Eagle-Picher (EP) DATE: 1953- 1969 DOC#: EP009 DOCUMENT DESCRIPTION: Letters
20 October 1??3
Hr. V a lte r P. S in c la ir hOOO G lenm ore Avenue
B altim ore 6, K aryland
Dear V alter*
A f t e r c a t c h i n g up w i t h t h e a c c u m u la te d w ork t h a t a w a ite d me upon v y r e t u r n f r e e err r e c e n t t r i p t o K sshingtoa and th e E xperim ental S ta tic , I have had a chance to c o l l e c t s y thought s u f f ic ie n tly to w rite you ab o u t Qao-Cote Cement. I hope t h a t a y fran k r e c i t a l o f i t s c h a r a c te r is tic and p o te n tia l uses w ill be o f help to you.
As we d is c u s s e d a t th e S ta tic , Doe-Cote C eaent i s a ccefcin atio n F in ish in g a n d I n s u l a t i n g C em ent. I t d e r iv e s i t s a t t r a c t i v e n e s s , a s a f i n i s h i n g ma t e r i a l , from i t s sm ooth, bard and w h its su rfa c e upon d ry in g . I t s c l aia *a an in s u la tin g cem ent i s ev id en t from th e e x c e lle n t therm al co n d u ctiv ity valu es th a t you y o u rs e lf have m easured. N a tu ra lly , in a sin g le m a te ria l, one cannot 'h a v e a l l th e b e s t o f th in g s . In th e c ase o f One-Cote C eaent, th e coverage i s p o o re r th an f o r th e re g u la r s in g le purpose in s u la tin g cem ents t h a t meet sp e c i f i c a t i o n 5fIL--C--2 8 6 1 .
W orking down t h e l i s t o f p h y s ic a l p r o p e r t i e s , we f i n d i t s c o n d u c t i v i t y a t 00*F.
mean te m p e ratu re t o b e somewhere betw een .81 and .8 3 ; H H -C-2861 nu n o f .9 0 . You m ig h t w onder J u s t how su ch a good c o n d u c tiv ity c a n b e achieved in a ra te r i a l th a t has an appreciable higher d en sity than re g u la r cem ents. *e have reasoned th a t th is fav o rab le condition has been bTM ^ h t about b y th e f a c t , t h a t th e fo rm u latio n c o n ta in s b o th our M ineral wool and diatomaceous e a r th . A c tu ally , th e cosbined w eight of the tru e ly in su la tin g in g red ien ts, in One-Cote Cemsnty*! c o n sid e ra b ly g re a te r th an in maty c o ^ t i t i v e sin g le purpose ^ in su la tin g cem ents.
The d ry a d h e sio n o f Ctao-Cote i s v a r ia b le . I t h as good d ry a d h e sio n to o th e r in su la tin g m a te ria ls lik e block or b lan k ets, b u t adheres poorly to f a c e s . However, o u r e x p e rie n c e in in d u s tr y has shown t h a t t h i s i s n o t n e ce sS S . Z S n t a l c h a ra c te ris tic , I t . t a d v i c e la o r. than adcquaU f o r a p p lic a tio n t o r a t a l s u rfa c e s , p a r tic u la r ly in th e case o f v alv es and f i ^
t , n ,, *. l a r e e a s 6* . I f th e a p p lic a tio n on O ne-C ots Cement c o m p le te ly e n clo se s
t ^ ^ a l v e o i ^ f i t t i n g l b a r d * h l form s on d ry in g and -d ry adhesion- is no prob le m i t do re c o g n ise th e T act th a t Cne-Coto should n o t bo a p p lie d to f l a t t a l vsu rfa c e s.
Sbcn we come t o s h rin k a g e , Cbe-Cots Cement i s o u ts ta n d in g , in t h a t i t has no o ^ n k a g e whan a i r d rie d . This absence o f m easurable shrinkage raans th a t the
2 /
To i ttr. V a lte r P . S in c la ir 20 O ctober 1?53
freq u en cy o f c ra c k in g i e ab o u t n i l . C ontrary to th e ex p erien ce w ith normal F in is h in g Cem enta, th e r e a r e no eh rin k ag e e ra oka t o cone back t o and p o in t
up.
lh a n v s re c e iv e d tb e a a a ig n n e n t t o d ev elo p a cem ent w hich e v e n tu a lly became Jenown a a O n e -C o te , o n e o f t h e o r i g i n a l re q u ire m e n t w as f o r a b a rd m a te r ia l, l o u r m easurem ent o f h a r d n e s s b y t h e p la s t o m e te r sh o v e how s u c c e s s f u l we have ^ b e e n . Tour m sasu reean ta shored a p e n e tra tio n o f .1 7 , w h ile th e caxiraua fo r in s u la tin g cem ents ie 12$ and f o r fin is h in g cenante .1 0 . A fu r th e r naasure o f th e h ard n ess o f O ne-Cote i s shown by tb e b e t t e r th a n 200 p s i lo a d i t w ill o u stain w ith a deform ation o f 10* in th ic k n e ss. This hardness is o f course achieved through th e use o f a hydraulio s e ttin g b in d e r. This hydraulic binder g iv e s Cbe-Cote Cement a f u r th e r c h a r a c te r is tic o f g reen s tre n g th o r gvsen s e t. Though One-Cote i s s t i l l w e t, w ith in a p e rio d o f fo u r h o u rs, th e cement i s f in a enough to be canvassed. Furtherm ore, a f te r achieving i t s green s e t, i t
i s u n affected by w a te r and cannot be e a s ily washed o f f . * should th in k th a t t h i s green s e ttin g p ro p e rty and i t s c h a ra c te ris tic o f being u n affected by w ater a f te r being d ry should be a g re a t advantage aboard sh ip where d ry in g takes p la c e v e ry slo w ly and in s u la tio n n ig h t be e a s ily damaged in tb e c a se of steam
and w ater leakage.
.
I t s s tru c tu ra l s tre n g th as measured by th e ab rasio n lo s e t e s t i s su p erio r to r e g u la r in s u la tin g m a te r ia ls and b e t t e r th an many o f th e f in is h in g cements commonly a v a i l a b l e . As you found i n y o u r i n i t i a l e x a m in a tio n , t h i s d e v elo p Hnt of s tru c tu ra l stre n g th is dependent e n tire ly upon the drying conditions. Forced drying o r a p p lic a tio n to a heated su rface, g re a tly re d u c e s the jT fe c tiv e n e a e o f t h e h y d r a u l i c b o n d . On t h e o t h e r h a n d , a i r d r y in g p e r m its th e f u l l
developm ent o f i t s n a tu ra l hard s e ttin g p ro p e rtie s .
I t p e rfo n a o c s u n d sr a ta U n g h s a t e c rd ltlo n 1 adequate) b e tte r than th a t re q u ire d of th e te e u la tte g ceu en ta. It usgeeted v s x im a u . l i a i t of 1000 7.
i s b e t t e r th a n t h a t recommended f o r th e a sb e sto s ty p e m a te r ia l.
C e rta in ly n o t th e l e a s t im p o rta n t i s tb e f a c t t h a t One-Cote Cement lik e Eagle
S u p e r " 66" Cement i s i n h i b i t e d t o p r e v e n t tb e r u s t i n g o . s t e e l s u r f a c e s t o
w hich i t i s a p p lie d . To o u r know ledge, none o f th e a sb e s to s ty p e o f fin is h in g 'cem ents a re fo rm u la te d w ith r u s t in h ib ito r s . Again on sh ip b o ard , a s you v e il '
know, t h i s i s a n i mport a n t and d e s ir a b le c h a r a c t e r i s t i c .
I n O ne-C ote C em ent, we f e e l t h a t we have a s u p e r io r p r o d u c t. One t h a t n e e te th e requirem ents o f many a p p lic a tio n s . I tc ra p id acceptance by in d u stry is re c o g n itio n o f t h i s T a c t. trB b e lie v e t h a t once t h i s m a te r ia l h as been accepted. Tor Naval u se, i t s c h a ra c te ris tic s w ill bo o f in te ra c t to th e chip building t r i d o a s w a ll a s th o s e who u se In s u la tin g ra te ria l* f o r re p a ir* a t shore e sta b -
lish m an ts and a t so a .
To* Kr. Walter P. S in c la ir 20 Ootober 19$3
a l te r , you can .be assu_r_ed, th a t TM th ie xaatter and B incerely believe th the Kavy. Thanks f o r g irin g ua th is
feature.
vJ^aprrpuyr to be able to wboerkowf ibtheny9omu onto
t
.. - ^ .n in ln i ite inportant
opportunity of ouUining lte inpor
Toura truly#
TEE EAGLE-PICHE3 COMPANY
F L L /ja
b c c i Mr. G len J . C h ris tn e r D r. A. P . Thompson
P a u l L. L o sso
In su latio n D ivision
2 cc: Hr-' / Burgstrssser, Hilla. Asb. C 1 " V J. Myars, Jr. 1 C. J. Christner 1 Paul Losse, Joplin Research 1 * L C. Jonno
File
O c to b e r !*. 1955
Mr. haul Sirotta U. 5. havy I/Bpart:ent Pipifit * Machine i.ee., Coda Ho. 5^*5 8 th Wing. Rocet }r.*0 terry b u ild in g C o n stitu tio n Avenue wasbinitsa, D.C.
SUUJaCTi A3L2--?ICHR C X i-C JTi CL*XK? ( l i i U i A i i w a n i i i i h i H O Cx-koht)
Cear K r. S tr u tta
T e sta rd a ? , in ay p resen e* , you and fcr. J . Ih /in e lle o f th ia v y ^ p e o lfic a tio n a oction h a i a co n fero n c# ta le p h o c e conversati* w ith K r. s a l t a r ^ lc c _ * ir o f th Jiaval Ijc p e ria e n ta l ?hgineering S ta tio n in reg ard to th a e r lta o f U g le -? ic h e r One-Cote C e*ent v e rs a * tb * s tin d a r d Ravy approved A sbesto F L n U h irg CeswDt.
Tue p a r tic u la r a p p lic a tio n o f ap plying fin is h in g ee*ent over block in s u la tio n was e s ta b lis h e d a s ar. e x a a p le a n d , a f t e r c o n s id e ra b le d is c u a s io a , th e th r e e o r yca v a r e i n a g r e e a e c t on th e fo llo w in g c o n c lu s io n s :--
1 . E a g le -fic b e r Cne-Cot* Ceaent possesses a lo v e r d e n sity te a A sbestos C adent.
2 . R ealizatio n o f in creased t b a ra si e ffic ie n c y over A sbestos Ce**nt.
3 . vrs--C ote C e a e n t *121 p ro d u ce a f i n i s h o f p l e a s i n g s t i p p l e e f f e c t and t h e ap p lied eeaen t i s tougher and h ard er than A sbestos F in ish in g - v a n t .
h . Ho d o u b t, n o ta ry s a v in g * w ould be r e a l i s e d s in c e O ne-C ote i ' m t p o ssesses working q o a liU a s unequalled in o th e r fin ie u in g c e a e o ts.
In conjunction w ith th e above a ea tic ae d conclusion*. you v e rc v lly approved the u s e o f l'a g io --F i c c e r O ae-C ot# C e a e n t a* an a l t e r n a t e f o r A s b e s to s F in is h in g C eaeo t.
Va o h a l l b e a w a itin g errpress your opinion fin ish in g -Inaula tin g
your l o t t a r o f confirm ation and u n tic i to you w ill fu lly as to th e uso o f E agle-?iobor yne-C ote C tacct a s an appro b*V a ria i.
Tory truly yours, Thh AGL -FICH R COM?Ahi
c ( DEPARTMENT OF THE NAVY BUREAU OF 9 HIF9 WASHINGTON IS, D. C.
EXHSBiT 0-22
l M AT W H * TO
S39/2(548D) Ser 548-3194
The E a g le -F ic h e r Company 420 L exington Avenue Hew Tork 1 7 , New York
A tte n tio n Mr. Lee C Jenne
G entlem en: Tour letter of 14 October ^ i J . requeste^lnfor^ation ocncerninE
One-CoteFCeoent"r
conducted a i the U .3.
E
n
" P ^ t ' i s suitabl? for
A n n a p o lis, M aryland, in d eea , , , , cem ent. When t h e s e t e s t s
a s . ` ^ 1 ^ "la t^ o n f : ^ i s t y e o f m a te r ia l w i l l
are concluded, i t i s expecu
...
Tn * v e in te r im .
tentativ^approva^is^ereby^granted for the utilization
ove^
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insulation fin ish
in g cem ent i3 au th o rized
The r e s u l t s o f t e s t s or any p a rt o f t e s ^ r e p o r t s ^ ^ ^ ^ t h e r ^ n -
foroation re la tin g t o ^ u a lific
l i c i t y o r a d v e r tis in g pur-
& q u alification t f ^ a f o ^ h ^ u c t is subject to cance lla tio n
Sincerely yours,
\V. E. Pittecca. C dr. TJSN ^ s s t H*d. Rsoaccrch & D*v&crm3Bl
' plaaaiaj Breach
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JJy direction ol Chi d of Betoctb
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o m c ij, KEW iOhl i.
Pbaln*in INSULATION DIVISION
AIR MAIL - REGISTERED
JOPLIN RESEARCH: HR. PAUL LOSSE
I * dati
A u g u st 2 7 , 1956
SUBJECT:
U .S . NAVAL ENGR. EXPERIMENT STATION
ANNAPOLIS, MARYLAND EVALUATION REPORT 0101L8
NS-O65-OOI
Dated June 29. 195^
Dear Paul:
Enclosed you w ill p le a s e fin d th e U. S. N aval E ngineering Experim ent S t a t i o n E v a lu a tio n R e p o rt 0101^*8, p e r ta in in g t o E ag le O ne-Cote Cem ent.
S ince th e re is p h o to sta tin g equipm ent a v a ila b le a t th e la b , th e re p o rt i s b ein g s e n t to you f o r co p y in g . I t would be a p p re c ia te d i f you would a ls o in c lu d e th e C in c in n a ti o f f ic e in w ith th o se to re c e iv e c o p ie s , and r e t u r n th e o r i g i n a l r e p o r t t o me i n New York so t h a t i t may be a v ailab le u n til the fin a l Naval sp ec ific a tio n s are w ritte n .
Best regards.
L C J:n s
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DEPARTMENT O F THE NAVY
NAVAL SH IP ENGINEERING CEN TER. PHILADELPHIA DIVISION P H IL A D E L P H IA . PA . 1. 1
9390(FA-287)
2 8 MAY 1963
a g le Picher In d u strie s, Incorporated
American B u ild in g
C in c in n a ti, Ohio 15202
.
G entlem en: Re:
Proposed In su la tin g M ate ria ls fo r Naval V essels
The s e r io u s h a z a rd s o f a s b e s to s have r e c e n tly re c e iv e d ^ p r e a d
p u b lic ity and have gen erated a hig h le v e l of in te r e s t concerning i t s use
by th e U S . Navy as an in s u la tin g m a te r ia l. There a re many v a r e
5 S e J i S i n th e Navy b u t th e mSst d i s t u r b i n g from a
h a rd
yrittWTwfnt. l a +v*+ f o r p ip in g and b o i l e r i n s u l a t i o n and la g g in g # Tne
e S a W t h a n . 1 . . p c e a ib llity of * t - o l u t l ^ durln,
operations such as fa b ric a tio n , in s ta lla tio n and esp ecially during i l ^ o u t .
In order to minimize the hazards associated with the use o f asbestos and therefore reduce the p o ssib ility of deleterious e ffe c ts to the workers, r t ^ S e S ? v r s ? S y ^ L been in itia te d by the Naval Ship Engineering
C e n ter^ H y attsv ille, Md. , to in v e stig a te ths f J - i M U J r
a l t e r n a t e m a t e r i a l s f o r a s b e s to s u s e d a s la g g in g , p ip in g and b o i l e r Anmix*-
S a t S t S S o t u r . in s u la tio n , no used by tb a Navy. o u s t be aapoaed
. a S l y o f In o rean te m a te ria le in o rd e r to endure M operaturea above 200 F
fo r irten d e d p lrio d a . In a d d itio n , an acceptable in s u la tio n must e ih ib it
the follow ing c h a ra c te ris tic s :
.
1 . Low h e a t c o n d u c t i v i t y .
2. N on-com bustibility.
3. L ightw eight. A. C a p a b ility o f easy m olding and a p p lic a tio n .
5. M oisture re p e llency.
6. Non-corrosive, insoluble and chemically in e r t.
7 . Composition, stru ctu re and c h a ra c te ristic s must remain unchanged by temperature a t which i t i s to be used.
6764:M A:lal 9390(FA-287) S er 826
8 . H ost be verm in p ro o f.
-
9 . The m a te ria l and a p p lic a tio n c o sts should be econom ical.
10. The id e a l in s u la tio n should be nontoxic and n o n -in ju rio u s to personnel during fa b ric a tio n , in s ta lla tio n , u se, o r rip -o u t.
11. Once i n s t a l l e d , i t should n o t c l u s t e r , become lumpy, d is in te g ra te o r b u ild up in masses from v ib ra tio n .
The P h ila d e lp h ia D iv isio n o f th e N aval S h ip E ngineering C enter has been assigned task s to conduct a survey o f su p p liers o f in su la tio n to the Navy, to secure te c h n ic a l d a ta l i t e r a t u r e , and to in v e s tig a te m edical re se a rc h fin d in g s, S afety m anuals, and d a ta on re se a rc h being pursued by p r iv a te in d u s try in te n d e d to d ev elo p new o r im proved m a te ria ls w hich may be s u ita b le f o r re p la ce m e n ts f o r a s b e s to s f o r p ip in g , f e l t s and la g g in g . The c o o p e ra tio n and s u p p o rt o f in d u s tr y f o r t h i s stu d y i s e a rn e s tly s o lic ite d by th is a c tiv ity sin c e the h e a lth o f the worker is th e concern o f management, la b o r and th e governm ent. A ccordingly, th e Navy i s d e siro u s o f o b ta in in g in fo rm a tio n on th e fo llo w in g :
a . Are a lte r n a te n o n -asb esto s c o n tain in g m a te ria ls a v a ila b le w hich may be used as th e rm a l in s u la tio n p ip e co v erin g ? The in s u la tio n m ust o f f e r p ro te c tio n up to 750 F and be m anufactured in c y lin d ric a l s e c tio n s up to 3 f e e t lo n g , and s p l i t in h a lf len g th w ise.
b . Are th e re any sin g le la y e r o r com bination lay ered non-asbestos m olded m a te r ia ls a v a ila b le w hich may b e u sed as th e rm a l in s u la tio n p ip e co v erin g fo r p ro te c tio n from 750 to 1200 F?
c . What m a te r ia ls may b e s u b s t i t u t e d f o r a s b e s to s i n s u la tin g f e l t (p la in o r w ater re p e lle n t) fo r use on valves o r o th e r irre g u la r surfaces and w hich are s u ita b le fo r a range from cold w ater tem perature to 900 F?
d . What n o n -a s b e s to s c o n ta i n in g c l o t h m a t e r i a l s may b e u se d as a lag g in g ja c k e t over therm al in s u la tio n , o r as a wrapping on engine exhaust p ip es, o r fo r piping o r tu b in g , o r on the in n e r and outer su rfaces o f rem ovable c o v ers and on fla n g e s and v a lv e s from - J F t o 1050 F?
e . What h e a t - r e s i s t a n t b o n d in g m a te r ia ls may be s u b s tit u te d f a r
a sb esto s in s u la tio n fin is h in g cement over b lo c k in s u la tio n and irr e g u la r
s u rfa c e s where pow dering d u rin g r ip - o u t has been a problem?
.
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9390(F-287 i S er 826
1
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k m kail
Popartrcnt o f *;avy '
Davril Ship S:\rlnoarinij Center
Fhiladoluhia D ivision
Cede 6764 ' Philadelphie, Fencs/lvanla
19112
ATTliTIh"! Pr* J'ortnn Anzuth
Pear Dr* Anzutht
P"t P r o p e r 3 In su la tio n M aterial f e r Dsval V essels
6764tM A:Ul 95>n (r.U ST ?)
''i t h r e f e r e n c e t o t h e cuverai ninaral fib e r Of la te , such crtneral asb o stes products by c end b o ile r in s u la tio n s , cem ents.
lir a i r o l l e d chech-trps iufaciurir.r:, vy b eliev e th a t Lets a m n e t h azard o u s to
1 , l-ovsr h eat con4
v th an e isA la r ar-b^ot
L
6 . The/ are Incozbustiblcr sn i th e ir in sslativ q u a litie s an not chonr tsnpo rature*
v.
Anruth
*V.y ? ,
7 . They sr verm in p ro o f.
C. G enerally, they c a s t lo v e r than sim ila r a sb esto s products,
9 . Thj a p p l i c a t i o n c a s t i s c o n p a ra b lo o r lo w e r th a n a s b e s to s p ro d u c ts ,
10* They a re n a n -to x ic and have no sld o e f f e c t on prolonged oxporures during fa b ric a tio n , in s ta lla tio n , sarvico co n d itio n , o r during rip -o u t,
11. Such in su la tio n tu to r ia l w ill not boc-x lu a?7 , c lu s te r, o r
d is in te g ra te u n d er normal equipm ent c srv io a c o n d itio n s and a t nax in v n resosEKinded s e rv ic e a b le te m p e rstu ro .
12. lla jo rity o f th e Faglo-Pichar sin o ra l fib e r pipe in su la tio n
t u t o r i a l s su g g est* ! below a re shipped art! s to re d f l a t ; th u s ,
th e y e lim in a te nbo::od a i r " and re d u c e w arehouse and s h ip p in g
co sts.
' ; ; '' '
B a s e l nn t h e above s a i d p r o p e r t i e s , we recommend t h e f o llo w in g m in e r a l f i b o r in s u la tio n p ro d u cts f o r th o Havy D epartm ent to c o n s id e r.
a . Tor n a tc r ia l (a ) o f th e above referen ced l e t t e r , vo recoccend E ag le-rich er A lux-A -Felt fo r therm al in s u la tio n pipe covering.
T h is m a te ria l i s conoosed o f m in eral f i b e r and i s th e n molded i n two h a l f c y lin d r ic a l s e rp e n ts , sc o red o r Y -srw v e d f l a t p ie c e s ,
t o f i t a l l d i f f e r e n t p ip e s ic e s . M u r.-* -F e lt i s nr.de in
up to fo u r fo o t Io n a se c tio n s and o f f e r s tem p eratu re p ro te c tio n
u p t o $50 F . I s t h e n a n s o f th e p r o d u c t i n d i c a t e s , I t h a s
fa c to ry in s tc llo d /-ltrin u r. J o e ^ tin g fo r w eather p ro te c tio n .
b . F.or l t c c (b ) o f th o esxo referen ced l e t t e r , v? rccococad F u rlo -B ich o r Tab-bob Pip? Covering. This product i s a lso soi-e of c tn c m l f ib e r and i s rococcjond^d f o r tem oeraturos up t o 121DT*. vth g alv a n ised r a t a l nosh, and up to lhhOF. v ith r.onol o r s ta in le s s s te e l r.eta l
nosh. .
This product is facto ry fabricated in sin g le lay e rs, with
^
E ag lo -P ich cr p a te n te d Tab-hoV. c lo s u re d e v ic e f o r quick and snug
attachm ent on tho pipe to bo in su lated .
c. & d. Vo do n o t have any p ro d u c t to o f f e r .
e . F o r b o a t r e s i s t a n t bonding m t o r i s i s o v er b lo c '.: in s u la tio n and f o r i r r e g u l a r s u r f a c e s , V3 reccm sn d F a g le -P ic h o r O n e ^ o tn F in is h in g C snant. This i s a m ineral f ib e r product and moots a l l th e requirem ent o f SS-C-1&3, Type 11, Credo
Su=h a m in eral f i b e r bonding c o ra n t m a te ria l i s e f f e c t i v e l y used c ~ r bloc'-: In s u la tio n and ir r e g u la r su rfacesT They w ill n o t powder under normal serv ice condition s rJ during rip -o u t.
19 '? "r. Annuth
M . .. t .
inr'.j vt) have no evidence t h a t o u r /pi
f' of
b S & f l (s f e n c e d t a p erio d ical * *
^ S r e f c - h c t u p a o f th o cnoloynas sp o sai d u rin g such
product aa n u fa ctu rirg ), 0 J J*?* f" , 2c!;Jl . K 1v . _ ust
S t e a l p r e c a u t i o n t o p r e v e n t I n h a l a t i o n o f * V a i r - b o ........a - t
e x c e p t b y n a i n t a i n i n g a n a d o q u ato e x h a u s t b/ a tari*
r . Fro our experience in tho p a st y ith c in e ra l fib e r C In s U tlo n lw lu c rta , ve fo o l th a t no P o t i o n i*
during i t s in sta lla tio n * H w jver, ^ n n * r a t o r i a l s , v o r e c o v e r s ! e o n s e x h a u s t c ^ t e s , o_nc-
' i t e o V i'in s c*ey uni Porti-ani tenant* -n tb a absence o
___
a d e g u a ta e x h a u s t a i r , v c su g g e st th e a p p l i c a i n--7 u se ^
resp irato r.
h G c n 'ra lly , th s c in e m i fib e r products are cheaper and r.ulc e r
* to I n s ta ll. K cvurer, th s in s ta lla tio n co st vonM vary, de pendine pon enograpbicsl lo c a tio n , T to re fo r , a t t J m f ^ s t l r - a t e o f tho in s ta lla tio n c a s t can bo nade.
D uring our re c a n t
r e t 0" 91
t h a t yo n h e r e o a r . ^ e . f ~ i S 9f t o l S " m r c o n v e r s a tio n , y o u s t a t e d
including o " ^ . ^ ' l ^ f ' . ^ '^ u c t a t th is tin o . T herefore,
^ ^ o H o r e u r lL T ^
te * " * " ***
roe-rices to say. vo 111 to - ~ r ad.itlonal In fo rn ati or i f va need t o p erso n a lly tontac* y -J i e r n - .wr >*--
urgent Tetter* 5no yon soon a t th e n e s t t.5T.'. r.c o tin - . Scat r 3*
^ thle
Vary tr u l y y o u rs,
E^LH -Picrn?. xrP33r?.i~5, Tip, n t o r s * Minerals Division
r:;:/in
-* * *'"..n-:tVl* *
-
.O s o 5
z l *1' i t s l t l c " . . -* " :c >re'V>
P. Z . P-aitra E irector o f Kesenrch