Document RJLd0DNB6poG1VkDMLkyKvRez

\ 4 THE DISCOVERY COMPANY UNION CAABIOE CORPORATION MINING & METALS DIVISION P.O. BOX 579 NIAGARA FALLS, N.Y. 14302 TEL: 71S-285-33T1 August II, 1972 Mr. E. A. Andre Research Supervisor E. I. du'font de Nemours 4 Company Marshatl Laboratory 35th 4 Grays Ferry Avenue Philadelphia, Pa. 19146 Dear Mr. Andre: My apologies for not responding sooner following our telecon on July 26th. Our products are chrysotlle asbestos and are basically no different with regard to potential health hazards than any other chrysotlle asbestos. Simple precautions will permit the safe use of "Calldrta" Asbestos, especially in relatively small quantities. ' ' A The attached table contains fiber count data obtained by our Industrial Hygiene personnel. We feel that this data Is typical and that the spraying or abrading of resin and similar materials containing relatively small quantities of "Calidrta" Resin Grade asbestos contributes very little to the generation of free asbestos fibers. We are obtaining additional lab and field data to substantiate our original findings and we would be glad to work with you In testing your particular product. In discussions with OSHA personnel It is obvious that they are primarily concerned with large users of raw asbestos and not with products in which the fiber is held by a strong organic binder. I have received similar information from EPA personnel. A copy of current OSHA regulations is enclosed for your files. As you are aware It Is very difficult to cover.this subject in a letter. If you have further questions I would be glad to discuss them at your convenience In Philadelphia or elsewhere. Very truly yours. DUP 0902872 SC-DP-03840 Application Type Large polyester Manu facturing plant. (No special ventilation.) mu POLYESTER RESIN WllUFACTURE AND APPLICATIONS Thixotropic* Agent None Activity Background prior to tests. Pyrogenic silica R6-244 RG-244 Dumping 10 bags (200 lbs.) Into thin tank over about 25 Minutes. <-250 Pounds of pyrogenic silica dumped over 20 minute period. Wait 10 Minutes. Dump--250 lbs. of RG-244 over 23 min. ' Background 2$ Minutes after dump. Oust Counts Fibers/Ml.W Total Oust12* >5^. KPPCF 0.2 7.0^ 0.3 6.4 / G.2 6.7J 1.3 28.0 J1.0 38.6 0.6 24.2 4.4 11.5 1.4 13.7 ^ ii6o..62 y r Notes and Councnls ^ Breathing level of tank prior to operation. No typical asbestos fibers observed. Fibers counted not typical asbestos. Dumping rate slowed down to extend time for sampling Not very careful handling. Samples taken over RG-244 dumping only. Dump com pleted 3 minutes Into last sample. Dump of both pyrogenic silica and RG-244 made carefully. Fibers counted typical of asbestos. . 1.4 9.3 Fibers counted not typical of asbestos. Large polyester manu facturing plant. (No special* ventilation.) RG-244 Pyrogenic silica Dumping S bags (SO lbs.) of RG-244 in --3 minutes. > Dumping 5 bags (50 lbs.) of pyrogenic silica In --3 minutes immediately following RG-244 dump. 2.8 1.2 9.6 12.1 Dumping completed after about 3 minutes of 10 mi nute sample. Typical asbestos fibers counted. Careful dump. Dumping completed after about 3 minutes of 10 cinute sample. Fibers counted not typical of asbestos. Manufacture of polyester shower iu)li ~0.5X RG-244 and ~0.5X pyrogenic silica Spraying on mold exterior to Manufacture shower stalls. Typical air supported chopper gun. 1.4 1.3 1.0 1.2 1.0 12.4 11.8 15.1 14.0 12.4 Fibers counted not typical of asbestos. No fibers observed that could be identified as fiber glass. DUP 0902873 Table I - Continued ApplIcatton l'ype Large polyester fiber glass boat yard. "Thixotropic* Anent --0.51 RG-244 and --0.5X pyrogenic Silica -0.5X RG-244 and --0.5X pyrogenic silica Activity Typical laminating operations. Standard airsupported chopper gun. Edge grinding of cured resin boat hulls and Inserts. Outdoors. Dust Counts flbers/Ml.1** Total Oust^ >5/^ HPPCF Holes and ComacntS^ 1.1 0.9 o.e 1.2 1 1.3 3.0 2.3 2.1 19-lW Samples taken at breathing zone of operator spraying 22.3'*' .!!:<> )/ into a boat Mold. Samples marked (a) taken during ` gel coat spraying about SO feet away which fogged 1 entire building. 10.8 Fibers counted not^ typical of asbestos. ...... -- n Fibers counted not typical of asbestos. * j" Hind was quite strong and changing directions frequently. Heavy cloud of visible dust produced. large polyester furniture coating Manufacturer. Good building ventilation. -0.05X RG-244 Hand sanding polyester coatings. 0.002 0.002 0.003 1.6 1.9 1.9 Largo power Sander with integral hood sanding polyester casting. 0.001 0.002 0.002 0.6 Small amount of dust found apparently generated 2.6 during stacking of sanded parts. . 3.5 Hold filling area. (Liquid polyester poured.) > Nixing area where RG-244 added to liquid poiseesster. 0.001 ' 0.004 0.007 0.005 1.0 3.8") ys.4 Background dust from pecan shell flour and ground perlite used in blend. _________ ______________ ___ _____ (1) Present OSHA standard for asbestos fibers (~5 Microns In length) Js 5 fibers per Milliliter as an 8-hour tixM-welghted average. 10 Fibers per Milliliter May be allowed for no More than IS Minutes per hour for up to 5 hours in an 8-hour day. (2) HPPCF - Hill Ions of particles per cubic foot of air. The present OSHA standard for amorphous silica is 20 HPPCF, and the existing OSHA standard of SO HPPCF would apply to both fibrous glass and the dust froM polymerized styrene. (3) All samples taken at breathing zona level of operator. 10 Minute collection tine unless noted. ' DUP 090287 o y? i $ r\n *. A " n ?! iMi \ ii |.*i'1 ! ti V J / - >T V.U L.' L - u t 1 r > 7- r "-'l j!j i f-i r. UNION CACICIOE COnronATiC:! 4S25 ROYAL AVEWC NIAGARA FALLS, HEW YORK 14302 TEL6!II0UE: (716) 205-3311 Ext. 0567 FROD'JCT: Chrysotile Asbestos TRADE NAMES: Calidria Asbestos CHEMICAL FORMULA Kg6(0H)8 Si;010 - f. PHYSICAL DATA BOILING POINT AND MELTING PCiNT:. Not Pertinent SPECIFIC GRAVITY (H20*1): 2.45 s '. VOLATILE CONTENT: Absorbed Water 1 4% By Weight. Structural Y/ater Approximately 13% by Weight. APPEARANCE: Pellets cr Fine White Powder. Ha odor. Very Slight Solubility in Water. '. II. HAZARDOUS -INdgSDIcNTS . .. Not*Applicable. - III. Fins Aiv'D EXr?.QS(C>:! HAZAuD DATA Material is not Combustible. No Fire or Exclusion Hazard. IV. KSACflYiTY DATA INERT MATERIAL: . No Decomposition or Polymerization Conditions. V. WEALTr! HAZARD DATA ' THRESHOLD LIMIT VALUE: AIRBORNE CONCENTRATION The 8-hour time-weighted average airborne concentration of csteslos dust to which employees ore exposed shall not erxcod 5 fibers per milliliter greater than 5 microns in length, as determined by the membrane filter method at 401K50X magnifica tion (4 millimeter objective) phase contrast illumination. Concentrations above 5 fibers per milliliter but, not to exceed 10 fibers pet milliliter, stay be permitted up to a total ot 35 minutes in an hour lor uo to 5 hours in an E-heui day. (Per Emergency Standards of OSHA, Federal Register, Vote I'd, December 7,1971, Pages 23207-232C3) EFFECTS OF OVEREXPOSURE: Pielongeri over c>'oom-re may result m lung damage. EMERGENCY AtiD FIRST AiD Pr.OCEnuRES; 1?5-r Unable. t.'elena: has no acute teriy. > ` c DUP 0902875 4 vj. r7->ii.L o:: pro-c'xi*sms STEPS TO BE TAKEN IF MATERIAL IS RELEASED OR SPILLED: Avoid inhalation of dost Remove spilled material by vacuum cleaner. WASTE DISPOSAL METHOD: Waste and scrap should be collected and disposed of in sealed bags or other scaled containers.'Bmial or landfill suggested. VSI. SPECIAL PRO CT:QN IMFOfiMATION RESPIRATORY PROTECTION AIRBORNE CONCENTRATION^ 8 HOUR EXPOSURE^ 15 MINUTE EXPOSURE^ REQUIRED MASK TYPE TYPICAL MASK 5 maximum 10 maximum None required. -- 25 maximum 250 maximum 50 maximum 500 maximum U.S. Bureau of Mines Schedule 21B. Negative pressure on breathing. Uoveis nose and mouth. Willson Model 1009 with R--520 Filter and U-S-A No. S6432 with TypeH, Ultra Filter and others. U.S. Bureau of Mines-Schadule 21B Pow ered filter positive pressure. A Purscna! Environment Systems, Inc. Hood 330 or 351 with 1930 Scries filter. Over 250 - U.S. Bureau ot Mines Schedule 19B Type Willson GA21I M-S-A C positive pressure, ait supplied. Lead-Fop and others. (1) Fibers per milliliter greater than S microns in length, as determined by the membrane filter method at 400-450X magnification (4 millimeter objective) phase contrast illumination. (2) 8--Hour time weighted average. . (3) 15 Minutes in an hour for up to 5 hours in an 8-hout day. Reference - Federal Register, Volume 36, Pages 23207 - 23208, December 7,1971. VENTILATION Lccal exhaust for each operation is preferable. General area exhaust is acceptable. No special considerations. PROTECTIVE GLOVES: None EYE PROTECTION: None OTHER PROTECTIVE EQUIPMENT: Nona W?7. <V;.' MINIMIZE DUSTING AND L AVOID INHALATION OF DUST. DTJP 0902876