Document OENjRppVBxGv8oLgyV2KdJEVw

,tle: THERMOBESTOS AND MARIRITE - Fiber and Dust Release on Cutting :eciuested by: S. Speil SUMMARY 4ARIKITE, MOLTEN METAL MARIRITE, Regular THERMOBESTOS, and laboratory heat treated THERMOBESTOS (chrysotile converted into amorphous form) vere evaluated for fiber and dust release during cutting. The MARIRITE blocks vere cut with a rotary carbide-tipped.sav. The THERMOBESTOS blocks vere cut vith a bandsav. Vhile . cutting,, the airborne particulates vere collected by a Millipore filter equipped personal sampler attached to the operators collar. The cutting methods are believed typical of field cutting. The MOLTEN METAL MARIRITE released three times more airborne total dust and fiber than MARIRITE 36. The -heat treated THERMOBESTOS released significantly less airborne total dust and than regular THERMOBESTOS. Further evaluation is recommended to ascertain A. The physical properties should also be tested for probable degradation ,.jnce it cut and broke apart easier. Contents: Summary, Material, Test Procedure, Results end Conclusions Reported by _ R. M. Haller Materials Evaluation Section pop cc: H. E. Konrad - NT ' C. Sheckler - NT F. L* Fundsack (S) S. Speil J. H. Zettel Att: V. K. Hesse J. P. Leineveber G. P. Reimschussel R. H, Neisel ' R. M. Haller X. L. Xinder (2) Library (2) fol&L :g|l MATERIAL Two blocks of THERMOBESTOS measuring 2 x 12 x 36-in. vere received from Manville plant utilizing the following formula: Material ms Per Cent CELITE 256 CELITE 392 .\br * ' *>' Hydrated Lime It K 30 Chrysotile 22.U 2k.l U6.6 6.9 This is the formula for homogenized fiber. Two blocks of MARINITE vere received from Billerica plant vith the following measurements and formulas: MARINITE 36 Molten Metal MARINITE Dimensions, in. Formula, per cent a. Amosite b. CELITE c. Hydrated Lime 1/2 x 1* x 18 ` S3.3 33.3 33.3 1 x lH x fcO-5/8 ko 30 30 One of the THERMOBESTOS blocks was heat-treated as follows in order to convert the asbestos to the amorphous form: 1. Preheat two furnaces to 100C (752F) and 685C (1265F). 2. Heat block at 100C for 5-hr followed by immediate insertion into 685C furnace for 1-hr. 3. Asbestos was not fully converted, therefore, the block was heated at 100C for 3-hr followed by 685C for 25-min. It. After the 685C exposure the block was immediately placed at room temperature. The X-ray examination (No. l2l8-51-10) confirmed that the asbestos had all converted to the amorphous form. TEST PROCEDURE The MARINITE blocks were cut along the lU-in. side. The 3/8-in.- vide cuts were executed at a speed of 20 and 15-sec per lU-in. cut for the MARINITE 36 and . MOLTEN METAL MARINITE (MMK) respectively. The MMM was softer, therefore, it cut easier. A portable electric rotary hand saw (6000 rpm, 2.0 HP) was employed with a 7-in. carbide-tipped blade (eight teeth,' 1/8-in. wide). The cutting was OiT ' JOHNS-MANVILLE RESEARCH AND ENGINEERING CENTER Report No. Page l*Ol*-105 2 executed in the fire test room vith the outside veil fan on. The material vas at room condition. Approximately equal lengths of cut vere made vith collection times for the sampler of 20 and l6-min for MARINITE 36 and MOLTEN METAL MARINITE, respectively. The THERM0BEST0S "blocks vere cut vith a "bandsaw (No. 552) at a blade speed of 3300 ft/min (six teeth/in., l/l6-in. blade vidth). The bandsav exhaust system vas on. One-half inch.vide cuts vere made in the THERMOEESTOS along the 12-in. side at a rate of 15-sec per cut. The material vas at standard condition. Approximately equal lengths of cut vere made vith collection times of 30 and 22-min for the regular and heat treated THERMOEESTOS, respectively. As the above cutting vas in progress for each of the four blocks, the operator vas veering a Millipore filter personal sampler on his collar. RESULTS AND CONCLUSIONS The data generated by E. J. Bulava is as follovs: Product THERM03EST0S MARINITE 36 MMM Regular Heat Treated Total dust, mg/m3 11.5 37.2 .7 Not Measurable Greater than 5 u fiber count, f/cc 126 315 + U.h 0.8 Collection time - min 20 16 30 22 The increased dust and fiber for the MARXNITES is expected vhen compared to the_ THERMOEESTOS since no exhaust system vas in the immediate vicinity. The MMM dust and fiber release is about three times the MARINITE 36 release. This is . reasonable to expect since approximately three times more material vas cut from the MMM. Therefore, it can be concluded that vith normal cutting conditions the MOLTEN METAL MARINITE vill produce about three times more dust end fiber than MARINITE 36. " " The heat treated THERMOEESTOS yielded appreciably less dust and fiber than the regular THERMOEESTOS although it did cut and break apart much easier. It appears possible to expect THERMOEESTOS vith its asbestos converted to the amorphous form to produce significantly less dust end fiber. It is suggested that more testing be executed to ascertain this and to also evaluate the possibility of adverse effects on the physical properties (namely flexure and hardness). D. E. liillier W. T. Donahue N'ovoc^er 11, 1973 . U. W. Uenclry, 3V.T / A. R. I lark us/Vila P. L. Larle, R i D ^ File (2) A19-901: BUoT CONTRCL - SHALL, LLCLG YOUR LETTER, 11/5/73 An extensive survey has Loon conducted on small tools with regard to dust control as used in tha fabrication of tho following Asbestos' containing productsi TRAWSITS Pipe Products FLLICLOARD Type Products HARIUI7E Products Asbestos Panels TRAHSITOP Type Aco Panels - Asbestos Cement Extrusions Dry Wall Joint Carcnts Contacts were made with the following companies either through the marketing manager or the salo3 manager with regard to dust control on their sroall tools. And in all cases, except one, the only dust control equipment was on their small belt Sanderst Millers Palls Tools Greenfield, Massachusetts Mr. Ghaw, Tool Gen. Mgr. Rockwell Manufacturing Company Pittsburgh, Pennsylvania Mr. li. Williams, Prod. Mqr. Mr. Callahan, Gales Manager Milwaukee Tools Brookfield, l/isconsin Mr. Dick Randet, V. P. for Marketing Mr. Robert Youngquist Mr. James Bassonar Robert Bosch Corporation Eroadviaw, Illinois fir. I. Cheshire, V, P. Mr. Don Smith, Nat'l Sales Mgr. Skil Corporation Cnicago, Illinois Mr. William Foote, Marketing Mgr. Slack & Decker Baltimore, Maryland Mr. Dennett, Sales Mr. Dick Campbell, Marketing Hr. Don Ellison, Engineering Pilot Manufacturing Company Torrance, California Mr. J. Rawlins, President ' 4 D. E. Uillier November 14, 1973 In addition to the above, the following companies in ex- . hauat syoterns for welding and sand blasting ware contacted. ' These companies Irak's suction srstams but none ara attached to toolsi Pullman Ind. Vac. Clear.nr Maiden, Massachusetts Mr. rtouu -loccrt Manufacturing Company Troy, Ohio Mr. Jack Force Empire Abrasive Equip. Corp, Philadelphia, Pennsylvania I, also, have contacted Symons Corporation in Desplaines, Illinois, vho make a vacuum grinder for joints in concrete walls, and Kett Manufacturing Company of Cincinnati who have a fiber glass shoot saw with a dust collector but is only usable for material up to about cna-half inch thick. The Symons*, joint grinder uses a Carbide tool and mills the rough joints in concrete. Dr. Paul Larle ha3 been working on this project for some time and has some imported equipment from England for dust control on a b t D saw and for a portablo drill. In addition, he has put a vacuum pick-up on a large portablo "Skil" type saw for test purposes. based on his tosta to date and the tests conducted by the Asbestos Research Council in England, we find the following* CUTTIUG 0PUPATIONS Without Exhaust uVimfhand, portable power and radial type saws without dust extraction gives dust counts from 20 to 200 fibers per cc, depending on equipment type used and product being cut. With Exhaust Using hand, portable power and radial bench saws with efficient dust extraction gives dust contents as low as below 5 fibers per co, depending on equipment type used and product being cut. This requires a good high-vacuum type exhausting equipment. With Exhaust and Wet Cutting Using a good exnaust system and wot cutting, it appears less than 2 fibers per cc fiber count is obtainable. However, wet cutting is banned in California and has possible shock hazards. FROM NJEHS 0. E. umiar 04.24.1991 09116 NO. 1 p. 7 ULivStllUUi A4 f 42 I J DRILLING OPERATIONS Without Zxhause Drilling operations genera'.-; rue;; less Gust without oxhausts and probably run mainly loss c-ian 5 cc for most operations. With hr.haust Drilling with efficient exhaust Dyster.-j should readily meat tlio lees than 2 fiber per cc count under dry conditions without any wetor sprays. SANDING OPERATIONS Many portable power sander3 arc available with du3t collectors, however, very little sanding is done in tho field. The only operations requiring dry nending in any voluxoe is in gypsum dry wall applications, r.alnly in the Uastem U. S., as in tlxo Western U. S. a textured spray finish is popular which requires minimum sanding. In sanding dry wall joints, tho usual sanding i3 manual, using sand paper and a block, however, tho now joint cements which are ready-mixed require much les3 sanding. In many cases, just a touching off of high spots is required. Thero is a great labor turnover in this industry so total exposure is probably minimized. Ke are continuing to work on this problem and have additional equipment to investigate. It is highly possible that we might have to recommend part3 from various manufacturers and then interest somo manufacturer in assembling a complete unit to our specification. Our survey work la almost complete and we are putting together sono of our recommendations on equipment to solve these dust problems generated by use of snail tools. William T. Donahue FROM NIEHS 04.24.1991 09117 NO. 1 P. 8 Copiet: Subject: F. May J. McKinney < Some time ago, among others, I expressed the opinion that it would be worth considering a try at removing all Amosite from Maranite. For my part, this was based upon the absence of a specific hygiene standard for Amosite and the fact that Selikoff was using the adverse health experience of the Patterson, N. J. plant as an example of the unusually serious toxic effect of Amosite. In addition, at that time we were impressed with the concept that if we could remove asbestos from those exposures where control was difficult for the "user" and where Selikoff was-* "active" - insulation and construction in general - it would be useful. Since then two developments ftaye occurred. The U.K. has set a standard of 2 fibers per cc for Amosite - the same as for chrysctile. They are of the opinion that Amosite is not more fnvi r fViar rhrucoH Ip. A^niH-pfilv. f'npre -is a nnnri tv rsf data about pure Amosite exposure, but it would appear that they believe the Patterson experience was due to very heavy doses - levels rarely met in the past uses of chrysotile. I am inclined to agree 'with them but still have some reservations that the "nature" of Amosite fiber might lead to greater retention of inhaled fibers. Second, it is now clear that Selikoff is pursuing .studies of industrial populations other than "insulation workers" ana there is little or no validity to the idea that removal of asbestos from certain products will' limit his sphere of interest and activity. At this time, I believe the use of Amosite in circumstances where those engaged in manufacture or use of a product will not be exposed to more than 2 fibers per cc TVCA or a peak of more than 10 f/cc would be acceptable from both a health protection and a medico-legal point of view. This will not be easy to achieve. I have reviewed the old and current dust conditions at. Billerica and have talked with Bill Feitze about the health experience of employees there - insofar as that is known. It is apparent that Billerica hashad one of the poorest health experiences in the Corporation with respect to asbest06ii . and cancer. This is readily explained by the past high ' exposures... Although there has been improvement in the dust conditions, few stations have achieved 2 f/cc, many are still above 5, and too many are much higher than that. From the j records there is inconsistency of performance - stations ! fluctuating from 5 to 25 or more fibers per cc. Moreover, the conclusion that v.'earir.g a mask is being substituted for proper control seems inescapable. There also are questions about current methods of solid waste disposal. ; Engineering controls properly and continously supervised { to guarantee holding the fiber count below 2 f/cc should | be achievable and in the light of what we know now, is required , to assure the health of those engaged in manufacturing at j Billerica. The proper use of a mask for known "temporary" , higher exposure, the correction of which is in progress, can , be tolerated for a short time but should not be condoned as j a substitute for proper controls. Ifbrief exposure to peaks i above 10 are essential, a properly used"ventilated" helmet j is required. Protection of the users of the product must also be considered. : The products used in the metals industry ought to be ; controllableby adequate consultation with the users. V?e need to know what is the actual exposure of users in other fields where control is more difficult, such as construction work, i r.ncL '..'here the user might be ignorant of potential hazard or * ' high level of protection motivation in such areas. If Maranite I poses a health threat for these users, the situation must be | remedied. If my comments raise what appear to be insurmountable obstacles bear in mind the achievements along these lines elsewhere in the Corporation in the recent past. FROM-N1EHS ,24.199l 09 1 9 NO. 1 P. 10 vJcnn3-iV3nv;l!G L J luvd W _ vv ,, . To: P. L. Earle - R&D Center Data: April 11, 1974 From: .d. R. Christensen - R&D Center Copies: D* E- Hillier/G. L. Swallow - 4 North M. F. Trosper - R&D Center Subject: SAWING OF MARINITE 36A 1 IN. THICK; UPSON NAPLES MILLBOARD 1/4 IN. THICK; DRILLING HOLES IN TERRACERAN 1/4 IN. THICK. --SHELTER PRODUCTS--R&D CENTER--SPECIAL REQUEST-- Special samplings were done April 9# 1974 for airborne asbestos fibers generated during sawing of MARINITE 36A, Upson Naples Millboard also drilling holes in Terraceran. The three different tests were all ventilated by a Spencer Portable bag house. The results follow. Location Description Product TLV Results ACE Area Skilsaw portable MARINITE 10.0 P (75.4 F/cc of Product circular saw 36A 1 in. thick 10.0 A (3.0 F/cc- Development Model 553 Building (same for Skilsaw Drill Terraceran 2.0 P 0.2.F/CC all samples Model 598 1/4 in. thick 2.0 A 0.1 F/cc listed be- low) . Rockwell portable Upson Naples 2.0 P 0.7 F/cc circular saw Millboard 2.0 A 0.5 F/cc Model 528 1/4 in. thick A - Area sample P - Personal sample () - Peak Exposure Prepa^^by'Tr P. Antonson D. R. Christensen jet ROM N1EHS 04.24.1991 69120 HO. 1 P. 11 ;w. ?. L. Earle - R&D Center d-~: May 28, 1974 D. R. Christensen - R&D Center .. D. E. Hillier/G. L. Swallow - 4 North M. F. Trosper - R&D Center SAWING OF MARINITS 23, ONE INCH THICK USING A ROCKWELL PORTABLE JIGSAW MODEL 648 - R&D CENTER - SPECIAL REQUEST Special samples were done May 23 and 24, 1974 for airborne asbestos fibers generated during the sawing of MARINITZ 23, one inch thick. Ventilation varied but the baghouse used was the same. The results follow. Location Description Ventilation TLV Results ACE Area Rockwell portable Spencer portable P 2.0 0.8 F/cc of Product jigsaw Model 648 baghouse using 2 P 2.0 0.S F/cc Development hoses one to saw Building and the other to the vacuum table Spencer portable P 2.0 4.9 F/cc baghouse venti- A 2.0 2.3 F/cc lated saw only - Area Sample - Personal Sample Prepared by T. F. Antonson d. r. ciy&atensen jes sens Johns-Manville .64 24.1991 0VUi 'v Internal Correspondenca To: P. L. Earle - R&D Date: November 30, 1973 Fro^- D. R. Christensen - R&D Copc>: * Subject: M. R. Trosper - R&D D. E. Hillier, G. L. Swallow - 4N SAWING AND DRILLING OF MARINITE SPECIAL REQUEST Special samplings for airborne asbestos fibers generated during sawing/drilling of 1-1/2" thick marinite 23A sheets were collected this date. Ventilation to the portable saw/drill was provided by a Spencer portable baghouse v a 1-1/2" diameter flexible hose attached to the respective tool housing. Results of four samples taken appear below. Location Description TLV Result ACE area 'of Product Development * Bldg. Sawing Marinite on table-personal sample 10.0 F/cc Sawing Marinite on table-5' north of operator 10.0 F/cc 68.0 F/cc" Drilling Marinite on table-personal sample 2.0 F/cc 2.5 F/cc Drilling Marinite on table-5' north of operator 2.0 F/cc 1.4 F/cc Peak samples of only 15 minutes duration were collect during saw activity due to heavy airborne dust observe Prepared by: K. J. Williams D. R. Christensen jlh *0H NICKS .r~-- v'-t-W /-r HO. 1 n. <junI lJickJassn-s:-:iiraCa trl^sr^d CisswpcsSsGea % *. (Ml 4 aowtfc (. u tui - nn to ~' 3? hM (MZS3< sett COST tea. KBU1X ICCU b(cntilnn.Mom-B-*---J-ff-i-cc-:-c;c-i--i3lKK.iaiif--t 44 t(tt viU 1(UW;. *Ic.c.(ia.ttc.amIhMcMtetaMattUa. tMCaommrr ttWWw*jriMMv---*-M--l1-a--**w* KlVMll iMw*t ca Scatea* 4 litl lijt l411 (ItliUaf uIlMtUt,U.M4V44.4 IMwulil kljfWrt Mt tkl 4 lilt I U. n*r tn Immh w 4 nil. 4i/s u. m w* <u m him ta its imeiiM. mi law cwta ta l-l/ll U. tag la 4 ftqr r*TT*4, ium| law laitfMl (at ar-4initial MUrlll* will laha atuCouu u sick as mala aM kUa ntUai WQ13- ^Ct..r < S. u ' i. vt 3 - AH .!> # * k~ s. ef(i-- - f* . Scute * 4 (tB!. MSc..b(laUate-tadrt *- 4W*4* >*- It Johns-Manvil! tj P. L. Earle - R6D Ctr Dote. December 14, 197 3 Fron D. R. Christensen - R&D Ctr Copiej. D. E. Hillier, G. L. Swallow - 4 North M. R. Trosper - R&D Ctr Sub;-;?: SAWING Or MARINITE 3oA, R&D CENTER - SPECIAL REQUEST Special samplings for airborne asbestos fibers generated during sawing of 3/4 inch thick KARINITE 36A were collected on December 11, 1973. Ventilation was provided to the hood of a 9-1/4 inch portable circular saw (Black & Decker Super Saw Cat) as well as to an open-face vacuum box type table located directly beneath the sheet being cut. A Spencer portable baghouse provided the exhaust ventilation. Results of four samples taken appear below. Location Description TLV Result ACE area Sawing MARINITE 2.0 2.2 F/c of Product over vacuum box Development -personal sample Same as above 2.0 1.8 F/cc personal sample run concurrently with first Sawing MARINITE- 2.0 1.0 F/cc 5' south of operator Sawing MARINITE- 2.0 0.7 F/cc 5' north of operator Prepared by: K. J. Williams D. R. Christensen FROM MIEHS Johns-Manville Internal Correspondence To: P. L. Earle - RD Ctr Date. December 17, 1973 From: D. R. Christensen - R&D Ctr Copi; d. E. Hilliar, G. L. Swallow - 4 North M. R. Trosper - R&D Ctr Subject: SAWING OF MARINITE, R&D CENTER - SPECIAL REQUEST Special sampling for airborne asbestos fibers generated during sawing of 3/4-inch thick MARINITE 36A and 65A, col lected on December 14, 1973. Ventilation was provided to the hood of a 7-1/4-inch Rockwell, Model 315 portable cir cular saw, as well as to a modified open-face vacuum box table located directly beneath the sheet being cut. A Spencer portable baghouse provided the exhaust ventilation. The results of four samples appear below. Location Description TLV Results ACE area of Product Development Building Sawing MARINITE over vacuum box personal sample 2.0 0.4 F/cc Same as abovepersonal sample run concurrently with first 2.0 0.4 F/cc Sawing MARINITE5 * south of operator 2.0 0.2 F/cc Sawing MARINITE5' north of operator 2.0 0.4 F/cc Prepared by: T. F. Antonson D. R. Christensen PRODUCED'v JM - 83 i I Johns-iVJanville r*N "--.O' r*> <*"' ',-n (f** - To. P. L. Earle - R&D Center o^u.: January 14 1974 Fiom': D. R. Christensen - R&D Center D. E. Hillier, G. L. Swallow - 4 North Copies: M. R. Trosper - R&D Center Subject: SAWING OF MARINITE 3 6A, R&D CENTER - SPECIAL REQUEST. Special sampling for airborne asbestos fibers generated during sawing of 3/4 in. thick MARINITE 36A collected on January 11, 1974. Ventilation was provided to the hood of a 10-1/4- in. Rockwell, Model 510, portable circular saw as well as to a modified open vacuum box table located directly beneath the sheet being cut. A Spencer portable baghouse provided the exhaust ventilation. Although sample results are relatively low, visible airbone dust was ob served in the cutting plane of operations. The results of two samples appear below. Location Description TLV Results Ace area of Product Development Building Sawing MARINITE 36A over vacuum box personal sample Sawing MARINITE - 5 ft South of operator 2.0 2.0 0.5 f/cc 0.9 f/cc Prepared by: T. F. Antonson .\ (V. ' s- ! y. K. . V , Vc Cj ' ^ V D. R. Christensen jet Kon hitrti M.inyitip m REFRACTORY PRODUCTS V 43 no. r, i< Engineering Information J-M Products MARINITE Industry ALL Application DUST CONTROL FOR PORTABLE TOOLS J-M Representative REFRACTORY PRODUCTS DEPT. INDUSTRIAL PRODUCTS DIVISION Hand power tools are used extensively in the field to work Marinite sheets. A method has been developed by P.L. Earle's research group to safely collect the dust generated in sawing, drilling, and sand ing. The key to the system is high velocity-low volume air move ment at the orifice. Dust collection adaptors have been developed on this principle. The keys to good dust pick up are: (1) small pickup orifice at key loca tions on each tool; i.e., on saw 5/8" x 5/8" (no larger) with 50 cfm of air, a differential pressure of 4-5" of mercury on suction side and 1*5-2" diameter hose no longer than 10 Ft attached from the tool to the dust collector intake. Rockwell International Co. and Skil Corp. will provide a line of attachments for hand power tools made to J-M specifications. Drawings of units are attached. The user may make his own attachments using aluminum tubing and heavy aluminum tape. These attachments will pro duce results of less than 2 fibers/cc on all units except the circular saw. A special cutting table that provides suction under the piece being cut must be used with the circular saw to meet the 2 fibers/cc dust requirements. This level is below the 1976 OSHA standard. A drawing of this unit is attached. " . A drill attachment is also available from Cape Universal. Special high-velocity suction units are necessary to provide adequate air velocity to transport dust from the tool. Two units recommended are the Hoffman, Hoffco-Vac 237 and Spencer Model P-190. Research is continuing study and evaluation on this project, Details will be released as they are developed. James p Mgr.,/Engineering and TechjQlral Services FROM NIEHS ,VS - -3- xtr~* ,04 24,1991 09126 NO DUST COLLECTION SYSTEMS HoffCO - VAC 237 Hoffman Air Filtration Div. A Div. of Clarkson Industries, 103 Fourth Ave. New York, N. Y. 10003 Inc. Guy Cusumano (212) 677-3600 Spencer Model P-190 Spencer Turbine Co. Hartford, Conn. 06106 Blair Alexander (203) 233-3631 Tool Attachment Producing Companies Rockwell International Co. Power Tool Division 400 N. Lexington Avenue Pittsburgh, Pa. 15208 Skil Corp. 5000-33 Elstran Avenue Chicago, 111. 60630 Dennis Huntsmen (412) 241-8400 William Foote (312) 286-2000 Cape Universal Drill Attachment Cape Universal Building Products Ltd. Register Office P.O. Box 165 - Exchange Road Watford, England Telephone: WATFORD 34551 Telex: 262744 FROM HIEHS mmw&m: /^/-- i 04.24.1991 9i27 ^/'I'/z'O.D. rjby.' HO. 1 P. 19 FROfl NIEHS / 6UTTIN6i 60/ 64,24.1991 0 9 12 8 NO . 1 P . 29  .FROM N I E.H S n o. s pickup Poor <=?aw( ewe- 04.24.1991 09128 HO. 1 p.21 j-*--T o.o. Pickup Poor- wtuozv to enieeotM^ OUST SVTflACTQfr - POPTAfrig SAW 7 'A"0;a SLAoa F*Oh NIEHS r/ 04.24.1991 09129 NO. 1 P. 22 FROM NIEHS 64.24.1991 69136 NO. 1 P . 23 ^)CO <j<5.t2u6'b ^TwCu QU6T ^TRAnCTO?.- OP'lLL - CAP3 UMlVeP^AL T/PC. wto 4