Document Yzb6JwXw1mjY3NB2gjeNaKxn
urs!ra CAnKIOK OISf!jr.1l!CAf..3 COMPANY ihbtitutb plant p. o. box 2S3I. chmibton. will vilfciHu
W(h*i Mt . S. C. Giainbriino
oi. 2 3 October 1963
Industrial Relation;
Ofiioiii>p o.pi, iSciical Department - Plant 6.12 lNir rfof#
c i*r *
Mr. if. Dickinson Mr. [J. *o Pa si man Mr. R. A. 1 labor Mr. 1'. r. King IV. i:. n. I'osi.
Iv. c. u. Da me hi
Hr. J. w. J'erry
. Insulation Block Post Suivey
Mr. P. L. Henry
Construction Insulation Shop
Mr. R. A. Ileal
_
Plant 513
Mr. n. R. ththen^*T"^
Mr. ii. il. Kctcham
Mr. L. B. V.'eddell - Safety IV.pt,
Kudosed is a vary excellent and very complete Industrial llyriene re|x:rt on the potential hacardousness of "Thermobcstes", "K-nylo" and "'"arcv-Temp"
insulation blocks which liave been processed in the Construction Deportment's Insulation C>ho]'.. The rojort points out definitely that ,,Theii;v3l.xr.tC'>.'>" nivl 'Tarey-Temp" insulation blocks cannot be fabricated safely with existing equipment, bit tivH "Kaylo" insulation blocks can be fabricated safely- Mr. Peele's ivcf'nincndaticns are quite definite and I am sure that you will wish to comply with them. I believe this, particular project should be considered completed.
these to me.
If there are any comnvants, suggestions or criticism, please direct
Very ti-uly yours,
I'd:;: hi.
hue m vs
A2405
\ K llv.: velocity of air tlirough tlie downdraft hood on fvlh saw with .1.1.1 other hoods on the system open.
-A
c The velocity of air through the supplementary overhead hood on toth f saws with all other hoods on the svstem closed off.
d. Tin.', velocity of air through the supplementary overhead hood on Loth saws with all other hoods on the system open.
procuimsl'olh Coupling and analytical methods were as follows:
L/:J II '1 j.L
1. All samples used in determining the' actual concentrations .in air were collected with a midget impinger apparatus, sampling 0.) cubic feet, of air i>er minute through impinger flasks containing 15 milliliters of double distilled dust-free water.
2. All sample:? used in obtaining particle size distribution dit-i re
collected on millipore filters connected to a small battery-cjorated
pump.
:
A'iALiTICAL:
1. f.ich dust sample was evaluated through, the use cf a count inr. pr-oodure referred to as the light field microscopic counting tcc)uiiqu:.';;-
2. The particle sizing techniques were derived from two separate farces. First, the sample was prepared for sizing in accordance with a [eminent mounting method.+ Second, the actual sizing was accomplish'd in accordance with the recommended technique depicting the use of a filar micrometer, and a standard microscope while using both the <idX (high and dry) and the 97X (oil immersion) objectives.+
3. flic evaluation and free silica determination of ''Carcy-Tom|." mituriul was accomplished through the use of two method:;, First, throurh information supplied by Mr. L. D. Doiicnc, Director of Pcsraroh of the ihilip Carey Manufacturing Company and second, through cou'.n or' cd analysis performed by Mr'. Thomas M. Durban, Chief Chemist for lL.: Trudeau Foundation, Inc., Saranak Lake, H. Y.
Fl.di;i;f3: dee Pages n, 'J, 10 and 11.
" Di-ini"r an ! Hatch: " hvlnslr.iul Dust", 2nd Ldition, p'p. 152-153, 1 IcCraw-lli 1 1 [:fk rompm.;/, lii<:. , U' w Yf.'rl. , lOS'l.
* f'aulus, II. J., Tnlvitic, If. A., Fraser, D. A., and Keenan, It. C>. : "Use of Membrane Filters .in Arr Campling", A.1.11. A. Quarterly, Vol. 10, p. ?(M), September, 101.7
l lrr inker and Hatch: " 1 iidusl.ri :rl Dust", 2nd Edition, pp, 1GG-179, McGraw-Hill Look Company, Inc., Now York, 19bU.
A24057
I,
Kela L ive to chi:;t expxasures from Graph ill E Tables on Pages 8 C 3:
,
.F
1. "Thcnn-.'l'ostos" insulation blocks should not be fabricated when using only
Llic original downdraft exloaust ventilation.
2. "Kaylo" insulation blocks could be fabricated safely when using only Inc original downdraft exhaust ventilation if existing leaks, observed on the HI hand saw, are corrected.
3. "Kaylo" insulation blocks definitely may be safely fabricated when using the entire exhaust ventilation facilities now available, i.e., hoods above tire blocks as well as below. '
From Graph 112 t Tables on Pages 8 E 9:
1. Methods of handling "Them-obestos" blocks (preparatory to r-iwinr) and scraps (after sawing) contribute greatly to specific individual exposures as demonstrated by the following facts:
a. The fabrication process, which always begins at the H? land raw vi'jlf' the simple cutting of each 18" x 38" x 4" block into throe smaller blocks about 13" x 12" x 4", is normally the least dusty of all the fabrication operations as revealed by the samples taken on 24 Jan 1963.
b. However, on 6 Mjr 1963 , this operation was revealed as. being one of the dustiest, regardless of the ventilation being used.
c. There was only one major variable between the samples taken on the two dales, i.e., .the method of handling the blocks prepirutory to sawing. Consideration of the procedure used on these dates reveals: (1) that on 24 Jan 1963, the blocks were rolled up to the saw after having been removed from their shipping cartons and stacked on a "dolly" for easy individual removal and (2) on 6 Mar 1963, the blocks were not removed from their shipping, cartons until needed by the worker. A large amount of dust is produced when blocks at" removed individually fiom the cartons as a result of the naluial -a!.ran Lon produced when one block is pulled over the surface of lb' ether. Consequently, the dust concentrations on this date at flue, location were greater titan normal.
2. The supplementary overhead ventilation (added since the time o' the preceding tv.o reports) does successfully reduce the dus' exposures, however, it does not reduce "Thcrmobostos" dust exposures to within safe acceptable limits when cutting radii.
From Graph in f. .Table on Page 9:
1. "Carcy-Tcmp" dust concentrations for each exposure was substantially
greater than the comparable "Thermobcslos" dust concentrations an! in excess of even the most lenient TLV established for liuntnn exposures, i.e., 60 mppcf of ail'.
A2405C
oi' "Carey-Tcmp", to within safe acceptable limits, i.c,, 20 mppcf of air.
Relative to the exhaust ventilation system:
1. The duct velocity in the downdraft ventilation system cn loth ' v- I -wus f
is far below the recommended value of 4000 fpm.
1
2. The duel velocity in the overhead ventilation system cn both bind saws is equal to or more tlian tha recommended value of 4000 fpm.
3. The velocity in the downdraft ventilation systems for both bind saws could be increased by patelling all holes, leaks, etc., now in existence.
KkCOf DlOlDATTJi i
Materials unless:
a. The atmospheric dust pioblem can be reduced to below 20 rpprf of a .in through the use cf improved ventilatibn tccliniqucs or repairs to V,? existing system, or
b. The mmufacturers of the two makes of insulation rn.itorja.lr: are able to produce a product which will not release, upon f it rici`. ion with a bond saw, dust concentrations in excess of 20 mppcf of air.
23 OcLob'.'r 1303
Industrial Hygienist
A24053
Pv ilu.it ion cl
jiMKrRiAt. ir.r.inii: survey
ALinaupbjric l>.jrst Conditions at the Construction Insulation Table 111
Atmospheric Dust Concentration Data Collected Wien Using Only Partial
Ventilation,,i.e., Only Below the Blocks
Shop
, r
Date
25 Pcb G3 2't Jan 03
6 Mar 63
25 Pcb 63 2*1 Jan 63
6 Mar 63
Cutting t Edging Insulation Blocks
Type of Material
Kay! o Themobestos
It
Knvlr. Thermobestos
1!
Description of Loc at ion
?1, i.e., South Side of the U2 Band Saw
/> 1, "
M |i
It If
II
#1, ''
11 II
II M
It
//2, i.e., -South Side of the //I Band Saw a*) I? H II If II II If
112, "
" ; " l II 11 M II
Concentration in rr.ppcf
9.32 10. on
51.50
17.32 76.36 U2.70
*
'
Cutting a Padius on Insulation Blocks
LYi 1. e
Mir r.? 25 Pcb 63
Mir 6 3 2*i J-m 63
6 Unr 63
Mir 6? 25 Pub 63
t * 11' 67 .. 2'i J.m 6.1 '
6 Mir 63
Type of Mitcrial
Kaylo 11
ThenvjLcstos 11 11
Kay Jo
II
Thciunbcsto:.; 11
II
Description of Location
//3, 111,
i.e.,
II
Soutli Side of
II It tl
1b: 11
II2
II
B.n-fl i
Saw
If
f!3. II
11 H i' If tl If II
II3, ll
MII 11 It
It 11 II
//3, If
11II 11 tl If 1
II
IN, i.e. , South Side of the 111 Band Saw
lin, It
11 II tl II II II II
II", tt
*1II II
II It fl If
11 1*it II It If If
ft
li", II
11l II
If If If If
Cop.centr.it icn in rppcf
17.10 3.30
lni.'if) 69, yj 36. G 2
3.06
39. Vj IM.l'J OG-69 70.09
A2407C
V
Illl.o 6 I'nr (! 26 Feb 6.1 G for 6 1 .26 lei. f-.l
1-- /'2 A'm.vpli: r-. I-: ncCnlt' it ' 111 h>M
Collect'.-1 .lien being All A'.' ciluld o l'en' i hiticn, l.c., Both Aleve C P,c.1ow the Blocks
Cut'ting 6 Idging Insulat ion Blocks
.-10 or r.it --rill
Them* ibes lor Gir'-'V-Tcrii].
Thonro!
:
Cirev-Te.irp
Description of location
#l.i, i.e., South Side of the H2 Band Saw
II j ^
It
*It 11 Tl It H *1
//?a, i.e., South Side of the //I Band Sr;
ffjr\ H
M ' M H M I' I' "
C msenV iv.t ion in npref
m.ro 61. in
17 , VI 06.20
hit e
6 dlir 6.1 6 bar 61 26 Tub (.1 26 l '-h 61
Cutting a Badius on Insulation Ulocks
Vr
! \'pe of 11 it'-'n'i 1
Thonrolmslos Th'urolvj:'.1 os Caiw-'lcnip Cm .'.-Temp
Description of Incation
//la, i.e., South Side of the 0? Band Saw
//'ii, i.e., jj\I*
South Side of 1' tt tt
the tl
i>l
It
Ban I It
Saw M
/(Si, i.e., Ilorth Side of the II] Band
aw
no-'n' ration in rrppof
22.il?
61.70
06. MO
IC'D/'O
Index for Graphs II1, <12 f. i1
' 1. South Side r iiv.i Saw - Cutting Blocks - Vent i Lit ion On! . i: 1
/ . " " ;i [
It - lodging
M
MIt tl
1! i It f; - ti M - Cutting a Bad iu s M
tl It
M
11 If j
tf tt
!tl It
M
It M
'1 i l
1It 1
/'I 1
. " i!v " VI
1 M tf
<t *t
- Cutting Blocks -
M - Kilning
II
tf - Cutting a 1'adj.nr
" " ri M
:It II It
tl
tl ,f
Both /!.) !. 1 ' ! >;: IIM II M II *
*
l North : id" -71 nd Saw - Cut ting a Bndiur - Vciit j l at ion l!o! h A!
IV'l.C'W
A24C7
Irial i<
1 2 *>
Ivi.ci'vi'niLi.on o[ I'eicciil Mi'.'. Crystalling Itc.1 L'.ilica Pm-''lit in "I hennol'CSl , "Kaylo" r. "Carcy-Tanp" as Q'l.irLr. by tlv "Talvitie" Method
"Thenrobestos" (As Contained in Report 62-IH-l-G-l)
in C-V.vns
t-2 in Grarr.s
in Grams
T 1 me ?i02
C.5002 0.60(10 0.6007
0.0390 0.03U7 0.0396
0.0069 0.0060 0.0092
Average Percentage Crystalline Tree S3.O2 = 6-11
0."? b. 60 6. 20
"Kaylo" (As Contained in Report 62-1IJ-1-G-1)
Vf
Trial U
1 /O 3
in Grains
'.'2 iii Grams
W3 in Grans
" lire CjOj
0.6000 0.60U0 0.5000
0.0007 0.0730 0.05G3
0.0U33 0.036*i 0,0130
7.i0 7.32 7 ,r,
Average Percentage Crystalline Tree Sj.C'2 ^ 7.'1
"Carcy-Tnmp" (As Reported by Mr. Thomas II. IXirkan)
M October 1963
tcm|-anents ( >hible in IId Gtlv'r ("t>it'|'>nvi>lSoluble in Diosphoric Ac.i'.l
Percentage Crystalline lice
as Quartz
.10. Ill
on. 01 ?9. m
00.'ll
A24072
11.
V '! 'Ho 0u
Ventilation Kales on Two Kind Saws
Fif
Kile
lb-.xl Feing l-iikl Saw Cheeked
Description of Condition
Venti1ation Kite in fpn
25 Feb G.3 G Kir G.3
25 Teh r.V G Kir G3
25 Feb C-3 G I hr 63
25 l ot) 63 Kir 13
25 Fob G3 6 Kir 63
i>2 112 in. in. in. >1 2
in. in. in II2
Dov.ivJraft
11 11 11 11
Overhead ri n ii
Only Downdraft System in Operation
H 11
11 11
II
Downdraft E Overhead System in Operation
U
II
II 11
11
Evci'y Hood in the System Open H (I 11 1| 11 11
Downdraft Overhead System in Operation
11 If 11
II I* ' H
Every Hood in the System Open 11 II 11 II II II
1500 ft.50 1200 1200
050 000
(.600 >1500 'if'fJO
5r
25 Feb 03 G Kir r,J
25 Feb G.3 6 Kir G3
25 Fell G3 G Kir 63
25 Frb 03 G Kir 63
25 Feb 0.3 G Kir G3
1 "1 /VI T 111 n
in. Hi ni n
Dowivlraf t 11 11 II <1 II
Over] lead 11 M M
On.lv Downdraft System .in Operation
m ii
m ir
ii
Downdraft Overhead System in Operation
H l II
*1 11
It
Every llcod in the System Open *1 II 11 11 tl It
Downdraft E Overhead Svstcm in Operation
H II II
11 11
!
Every Hood in the System Open if n ii ii ii ii
21 on 1 :.01 1600 15 50 1100
r-:.no ill no 1200
A2407 3
l.'oncoiitc-it. ioim in nppel of Air
Concentration in mppcf of Air o * M(' oli 3 oUl 6O' o o^ d o4>
lliu- 82
o yj *u X Z
9
K>
Ccuconiration in mppcf oi Air