Document mp48xj7pQ27rN9BzQLw87KoXd

in i rr.nr.iAi., tftfmijsmpormnnow UMSOra CAnHiiCiK I8(!rni!CSAf..O COMPANY in#titutk plant p. o. box 2A1i, charleston. wtsi virtbiNiA u fM***) Mr. S. C, Giambrurio oi. 2 3 October 1963 Industrial Relations Ofi9in0ii,,9 opi. Me jical Department - Plant 612 An|wrfng /#/f#r c/of# Cfif Mr. M. 11. Dickinson Mr. 11. b. lb stman Mr. R. A. Huber Mr. p. r. King Dr. P. M, Pc's i. Ur. c. u. Durnchl Mr. J. W. Perry lubi.ci . Insulation Block Dust Suivev Mr. P. E. Henry Construction Insulation Shop Min R. A. Heal Plant 511 Mr. D. R, IVatteny^"^ Mr. 11. 11. Ketcham Mr, L. B. VJeddell - Safety IV.pt. A Enclosed is a very excellent and very complete Industrial Hygiene, report on the potential hazardousness cf "Thermobestcs", "Kaylo" and ""arov-Tcmp" insulation blocks which have been processed in the Construction Department's . Insulation Chop. The rejxurt paints out definitely that ''Thnnnobestos" and 'Tar-'y-Temp" insulation blocks cannot be fabricated safely with existing equipment, bit that "Kaylo" insulation blocks can.be fabricated safely- Mr'. Peele1 s ivconmcndaticns are quite definite IncT I am sure that you will wish to comply with thorn. I believe this, particular project should be considered completed. these to me. If there are any comments, suggestions or criticism, please direct PJP.rhl. 1 '.iv.: 1 o sur. vs lexton, M,l). Medical Director A2406G UCC 016146 iti'-.1 ve locity ol air tlirougli tire downdral t hood on hot h v.:;vi t;h all other hoods on the system open. c. The velocity of air through the supplementary overhead hood on both saws with all other hoods on the system closed off. d. The velocity of air through the supplementary overhead hood on Loth saws with all other hoods on the system open. PPPCCDUREG: bath sampling and analytical methods were as follows: SAMPLING: 1. All samples used in determining the" actual concentrations .in air were collected with a midget impinger apparatus, sampling 0.3 cubic feet: of air jxir minute through impinger flasks containing 15 milliliters of double distilled du3t-free water, 2. All samples used in obtaining particle size distribution data '..ere collected on millipore filters connected to a small battery-operated pump. : ANALYTICAL: 1. Each dust sample was evaluated through the use of a counting procedure referred to as the light field microscopic counting tcclmique. 2. The particle sizing techniques were derived from two separate c areas, first, the sample was prepared for sizing in accordance with a permanent mounting method.+ Second, the actual sizing was accomplish''J in .accordance with the recommended technique depicting the use of a filar micrometer, and a standard microscope while using both the *i3X (high and dry) and the 97X (oil immersion) objectives.+ 3. The evaluation and free silica determination of "Carcy-Tcmp" material was accomplished through the use of two methods, First, through information supplied by Hr. E,, D. Ermenc, Director of Research of the Fliilip Carey Manufacturing Company and second, through c:on!. act >:r\ analysis performed by Hr. Thomas M. Durban, Chief Chemist for the Trudeau Foundation, Inc., Saranak Lake, N. Y. FJ.CULTS: Lee Pages R, 9, 10 and 11. ! DrinK-t and llalrh: "Industrial Dust", 2nd Edition, pp. 152-153, McGraw-Hill. Pro;. Company, In,;. , 11 w Yorl. , 105'). ' * Pauius, 11. J., Tal.vi.t.ic, N, A., Eraser, D. A., and Keenan, R, G, : "Use of Membrane filter in Arr fiampling", A. L JI. A. Quarterly, Vol. 10, p,, 26:1, September, 1957 t Drinker and Hatch: " 1 ndustriol IXist", 2nd Edition, pp. 1GG-179, McGraw-Hill Look Company, Inc., New York, 1954. UCC 016147 A24067 't V I, < 1 `IJflJiMMl;;: Relative to dust exposures from Graph ill Tables on Pages 0 t 3: , F< 1. "Thermobestos" insulation blocks should not be fabricated when using only the original downdraft exhaust ventilation. 2. "Kaylo" insulation blocks could be fabricated safely when using only the original downdraft exhaust ventilation if existing leaks, observed on the //I band saw, arc corrected. 3. "Kaylo" insulation blocks definitely may be safely fabricated when using tiie entire exhaust ventilation facilities now available, i.e., hoods above the blocks as well as below. ' Prom Graph 112 Tables on Pages 8 6 9: 1. Methods of handling "Thermobestos" blocks (preparatory to sawing) 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 il? land saw wv'tlf the simple cutting of each 18" x 36" x 4" block into three smaller blocks about 18" 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 Mur 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 dates, i.e., .the method of handling the blocks preparatory to sawing. Consideration of the procedure used on these dates reveals: (1) tlvat 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 nro removed individually from the cartons as a result of the natural a I. fusion produced when one block is pulled over the surface of th' oilier. Consequently, the dust concentrations on this date at this location were greater tlian normal. 2. The supplementary overhead ventilation (added since the time o! -the preceding two reports) does successfully reduce the dust oqosurcs. ' However, it does not reduce "Thermobestos" dust exposures to witlvin safe acceptable lim.its~wTien cutting radii. From Graph H3 f. .Table on Page 9: 1. "Carcy-Tcmp" dust concentrations for each exposure was cubslanti.jJ.ly greater than the comparable "Thermobestos" dust concentrations anl in excess of even the most lenient TLV established for human exposures, i.e., 60 mppcf of air. UCC 016148 A2406C 2. 'H''' ing oxliaust ventilation system an instil ] e;l on 1 - >! 11 lend wn iv. .incapable of reducing tin; dust hazcuvl, associated with L!>.* fabr.irai. i n of "Carey-Temp", to within safe acceptable limits, i.e,, 20 mp[>cf of air. Relative to the exhaust ventilation Bystem: 1. The duct: velocity in the downdraft ventilation system cn loth 1 v- I rows is far below the recommended value of 4000 fpm. 1 2. The duel velocity in the overhead ventilation system on both bind saws is equal to or more tlian the recommended value of M000 fpm. 3. Die velocity in the downdraft ventilation systems for belli bnnd saws could be increased by patching all holes, leaks, etc., now in existence. RECOMMDJDATTJiJo: 1. I'o not. fabricate 10" x 36" x 4" "Carey-Tcmp" or "Thcrmobostor." insulation Materials unless: a. The atmospheric dust problem can -be reduced to bole.-.' 20 pppe f of a .in through the use cf improved ventilation tccliniqucs or repairs fn >;),? existing system, or b. The manufacturers of the two makes of insulation materials are able to produce a product which will not release, upon fabricD ion with a I bond saw, dust concentrations in excess of 20 mppcf of air. RU':hl 23 October 1363 Submitted by: Industrial Hygienist . .... . in I - to. UCC 016149 2 4 06 9 <*v- \' . ].v il.i.i.it .ion cl J.HPUSTIUAI. UYr.lKNi; survey Atmospheric Durst Conditions at tlva Construction Tabic //I Atmospheric Dust Concenti'ation Data Collected When Using Only Partial Ventilation,,i.e., Only Below the Blocks Insulation Shop , i Date 25 Pel.' 6 3 24 Jan 63 6 Mar 63 25 Bob 63 24 Jan 63 6 Mar 63 Cutting C Edging Insulation Blocks Type of Material Kay.lo ftThemiobcstos K lylo Thermobestos 11 Description of Location ^1, i.e //1, " HI, " SoIuI th Sidf!e oIff thfle HI2t BaInt d Sa11w 11 11 11 11 11 11 11 II2, i.e II2, " 112, " SoIuI th SidMe oIff thIfe 11111 [lanIId SaIIw 11 1? If II 11 ff II Concentration in mppcf 9.32 10.00 51.50 17.92 26.36 42,70 ' r' Cutting a Radius on Insulation Blocks Mat e Mar 6? 25 Pel) 63 Mir 62 24 Jan 63 6 Mar 63 Mir 62 25 Bnb 63 Kir 62 24 Jan 63 ` 6 Mar 63 Type of Miterial Kaylo If Thermabestos If 11 Kaylo II Thermobestos tl 11 Description of Location f/3, i.e. , South Side of 11 ,e II2 Band Saw II3, II II tl tl II 11 1 II II3, If tl tt tf fl tt It 11 II3, II tl II If fl If fl If II3, ft If 11 If 11 t! 11 tf //4, i.e., South Side of the Ill Band Saw //4 , tl If tl II 11 tr If 11 II", t| //", It II 11 U 11 it It If If If tl II tt 1* II ft l It I* If it If It Concentration in rppcf 17.10 3.30 101,40 69.50 36.02 3.06 20.35 03.30 66.60 70.00 UCC 016150 A24Q7C I Vii i II 1 i I lUtc 6 tin- 6< 26 Bel) 60 6 Kir IT 26 lei. Id t!2 A1 m.v (du ri I " i:a- -nccnlt'-'i*. IVl a Collected '.Chen U: ing Ml AviiluMe Vent i la t ion, i.e., Both Above C He .low tlv> Blocks CutbinB, r. Edging Insulation Blocks ;f i vi .: of I', it 'r.iul Therm ibosi on tlir'-'V-rc;ii|> Themed ce,t n ; Carev-1'cn'p Description ot location Cenconfrv.ticn in nprcT //In, i.e., South Side of the II2 Hind Saw jf j ^ m ir " n ii m v m //2a, i.e., Scuth Side of" the II1 Band E.r> If 2 ] M 11 * M tl It II II M .dH.20 61. >n 17, TO C'd.20 Cutting a .Radius on-Insulation Blocks Dite 1 VpO c l lUte.ni.al 6 -Ilir 6d 6 It in 60 26 Tub 60 26 Tel. 60 Thennobestos Then'olier.tos C.uv.y-'lemp fill r;-T''ni|' Inscription of location IIda, i.e., South Side of the l(2 Band Saw //Mu, i.e., South Side of the Hi Ban) Saw ^ 11 V M 11 U f| It M //$u, i.e., Morth Side of the Hi Band '".aw nvuV rat ion in irppo.f 22.M? 51.70 06.M0 100. r'0 Index tor Craphs 111, it2 f. T'/o 01 ' South S>ide td ' aid Saw - Cutting Blocks - Ventilation On!7 i'eh ' /' 0 : " " !> t M 1* - lodging It _ 11 tl i /M i. .. i;- It 1 - Cutting a Padius _ M M It /'Mi n i. ii j M It tt M J M II It 'T i . " if: 11 Ii - Cutting Blocks - " Bolh /In - I 1 I <w i- " " 7 1 11 M - hdg.ing 11 11 M . 11 ii., " " 7; M If - Cutting a Radius It 11 11 '' 7M , " " i:! M n _ It tl ft . f *' 11 * '`\l 'Month : i). -71 : aid Saw - Cutting a Radius - Vcntidut .ion Poll: /'.l - > t Be)cm UCC 016151 " A2407 IriaL i> .1 ? 3 IVI.. tv., M,Lion e( I'etcenl Crystal Line Pree Silica Present in 'Mherivclfosl ns'1, "Kny]o" f. "Carcy-Inmp" as Quartz by tk> "Talvitie" Method "Thennobestos" (As Contained in Report 62-Ili-l-G-l) W]; in Grams W? in Grams '-.'3 in Grams 1 Tree Sj.02 0.000? 0.0000 0,100? 0.0390 0.0347 0.0396 0.0069 0.0068 0.0092 Average Percentage Crystalline Pres S]_Q2 = 6 -11 6.4? 9.90 G. ?0 "Kaylo" (As Contained in Report 62--G--1) Trial. H 1 7 3 in Grams V.'2 in Grams W3 in Grams n-j I rtv? * 0.5000 0.5000 ' 0.5000 0.0007 0.0730 0.0563 ' 0.0433 0.03G4 0,0190. 7.i'0 7.32 . 7 ,nr, Average Percentage Crystalline Pree = 7.11 "Carey-Tnmp" (As Re:ported by Mr. Thomas M, IAirkan) 4 October 1963 Com|-anents Soluble in Hel . Other Coii'ie'lientSolul.de in Pliosphoric Acid . Pei\:entage Crystalline Fi^ee as Quartz .10.(H 00,01 99,01 00.41 UCC 016152 A24072 V ' '! <H.o IIU Ventilation Rates on Two Band Saw;: F- if HU o Hood Being I'm ml Few Checked Description of Condition Vent 11 at ion Rite in fpm 25 ]V> 1) 63 6 Mar 63 25 Feb G1 G Mir 63 25 Feb G3 6 1 hr 63 25 l et) 63 Mir 6 3 25 Feb 63 6 Mir 63 H2 112 II2 il 2 112 il 2 II?. II2 112 II2 Downdraft If II II II II Overhead M If If Only Downdraft System in Operation H II II II II Downdraft 6 Overhead System in Operation M 11 If 11 M Every Hood in the System Open *1 11 11 11 11 11 Downdraft Overhead System in Operation 1 11 II II M it Every Hood in the System Open 11 11 II II If M .1500 I'iSO 1 200 1200 050 009 (.'600 '13 00 '1000 ' *i r 25 Tcb 63 6 Mir 63 25 Feb 63 6 M.ir 63 25 Feb 53 6 Mar 63 25 F.'b 63 6 Mu' 63 25 Feb 63 6 Mir 63 il 1 "L n ill III HI III 111 III III Downdraft 11 11 It t II Overliead 11 n it Only Downdraft System in Operation II II II II II Downdraft Overhead System in Operation 11 II If 11 II M Every Hood in the System Open M 11 II 11 11 It Downdraft E Overhead System in Operation II II II M 11 11 Every Hood in the System Open ii n ti it it ii 21 on 1601 1601 1 1 50 1100 6 600 'MOO H200 UCC 016153 ft 2 4 0 7 3 Conconir.ti.ionii in mj>f>ef of Air 5 P. ID r. I; Xa 7* Q < 3 o aa ililltftglSsi A24074 UCC 016154 OJ - o nA a b< c Ivi N, r- -i O IVI -l >< x *VJ a -i a: m o tn C aJ 3: m ui ao O 03 m U) X a 0-v k<> *- r~ m LO vi > "ti -i 2 LO > OJ > i*r`vii C n k j-* -I -h -1 o a t) o 1AJ > X z o \ ii JCJ2 pu* Concentration in mppcf of Air li OO 1 2-t Jm t,3 >* -- 6 ,,up 43: .v r 3.VJ *. %l.fr til 6 Kir 03 24 Jan til $ 6 Mar 0 3 Mar 63 VJ : * o. Ul J S Mar 63 S Mar 63 24 Jan 63 Har 62 Sr UJ 5 a 1? LA 3 .J ** 1r 1 .-- < a C-> 3 CJ - i. o 0 'v ?0 ,,3 * g* a 7W * i> '5` r* 3 <0 ?3 ?*0 ?? H T" 6 Mar 63 4? iQ? UCC 016155 J U-.i- 62 24 Jan 63 6 Har 63 m< X --1 X viis 0 $ o w l*yi HI L0A ~CJ IU'ili *L--dvA* O VJ c r < m "*1 nK.J X-y JiM w-*-*l4 r Vs* * < yi") On Ki\r.'l . j- \ o-cai.i V/"tSVi,i*i Lj0*A* Ku Ml7/0t 3C ltrfJ`Vl lP`J H Li y-aJ'l.3 i'j o )rJ > 'LI X :z p Ki o X* (loneon oration in mpjx-f ol' Air ri u oo ^ Ui oo oi o UCC 016156