Document gbyrLxDn84wRLZBmKM7GbRzeQ

FILE NAME: Kaiser Gypsum (KG) DATE: 1974 Mar 1 DOC#: KG 102 DOCUMENT DESCRIPTION: Memo RE Dust from Joint Compound Operations with Summary of Gypsum Association Reports 02/12/81 1 6 :3 0 MESA - 1 4 1 0 4 4 0 2 3 6 8 KAISER GYPSUM COMPANY, INC N O .067 P021/825 We have received a grcup of three reports from the Gypsum. Association covering anCunts of asbestos and siliceous dusts generated during miming and sanding of joint compounds on typical Jobs. Tie overall summary by the testing agency states, "There was evidence of exposure of workers to airborne concentrations of asbestos and both, total and respirable siliceous dust in excess of acceptable limits as estab lished by CSEA, Because cf the high concentrations of total dust gener ated during the mixing and sanding activities, it is clear that control of the tonal dust problem would provide an inherent control cf the asso ciated asbestos and silica problems as well." The first report deals with dry and presir products froc the other five major gypsun companies, with 7.GC materials not included. The dust sam ples collected were so heavy that reliable tests for asbestos could not be made, and cnly siliceous dust values are reported. The second report covers a recheck using dry and premix products from two of the above companies on siliceous dust values. The third report covers asbestos dust from the products used for the second retort. i. summary of the test data is attached. Also attached is a suasaxy of our own tests an. our own products. ACTION PTCUIPZD: 1) Review end recommendation as to whether asbestos warning labels ay legitimately be removed from our premia products. The law states that "no label is required where asbestos fibers have been modified by a bonding agent, coating, binder or other material so that during any reasonably'foreseeable use, no airborne Concentrations of asbes tos fibers in excess of the prescribed exposure limits will be released." Our company is the cr.ly major'company carrying the asbes tos warning on its premia ar.d it is costing us business. on as to company's position on what is next step to be taker, by th : Gypsum Association Study Committee on this project, T-KJ-mCl*w C--Ce-i4. ee is already cn record ir. favor of placing the asbestos *a m i a dust warning on all bags and pails of joint compound . JSS/sc At tac "?.cr. P L A IN T IF F 'S E X H I B I T U> f3& J PLTF 0495 05/19/00 20:03 TX/RX NO.0426 P.021 02/12/01 IS:30 KMESQ * 141044Q23S3 NO. 067 P022/025 SlftfliARY CF GYPSUM ASSOCIATION IMPORTS FI55T JRZPCr.7 September 1973 testa - Siliceous Dusts (asbestos dust data not reliable) Mixing of 5 dry pcwder joint caupouads (not including Kaiser) Worker exposure (breathing tons); S hr TWA QSrJv Limit Total dust - S.9 to 21.6 cg/cu a + spiralis dust - 1.3 to 9.1 sg/cu a * General arsa exposure: Total dust - 10.S to 34,0 cg/cu m 3.1 to 9.7 Respirable dust - 0.S to 2.6 tcg/eu m * Sanding of joints Cram 5 dry ponders and 5 prefixes Worker exposure (breathing sons): Total dust - 72.5 to 244.4 mg/cu m Respirable dust - 1.5 to 5.6 ffig/cu m 2.L to 15.0 * General area exposure: Total dust - 27.7 to 136.7 mg/cu 4.0 to 15.0 Rsscirable dust - 4.4 to 23*0 Eg/cu a 0.7 to 5.0 net calculable because samples too smell to analyse for free silica content needed for the calculation. Resgirable dusts are specific site fractions of the total dust. 7h* OSKn. U n i t amount:- vary because thjy are dependent 5CX the amcur.t c silica present. BESS: 1) There trp.s no significant difference among dust levels generated by sending Joints which used dry colder compounds versus those srhoeh used pre.tix erapounds. 2) No one manufacturer's product as significantly closer to complying eith OS.-H 1 nits than era the others, 3) I t i s aid that the individual werher is unlikely to hove more than 2 hrs. -- i.rsct axpcjure to aixir.g or sending each -erheay. PLTF;04?>S 05/19/00 20:03 TX/RX NO.0426 P.022 82/12/01 1 6 :3 0 KMESft > 1 4 1 0 4 4 S 2 3 6 S NO.0 6 7 P023/025 L* <>! . Su?.J.3-s.y or CYPSUVi ASSOCIATION REPOSTS &.CCKD 7-TPCHT November 1973 tests - Siliceous Dusts Mixing af t^o dry powder joist compounds Worker exposure (breathing zone): Total dust - U . 7 end 33.8 mg/eu a Respirable dust - <8.5 and 6.9 mg/cu a 8 hr m 05 EA Libit General area exposure: Total dust - 121.6 and 98,3 mg/cu m 6.7 and 5.4 Respirable dust -13.8 and 12.2 mg/cu m 1.3 and * Sanding of joints from 2 dry powders Worker exposure (breathing zone): Total dust - 109.5 and 196.3 mg/eu b 8.8 and 5.0 Respirable dust - 3*3 and 2.0 mg/cu n General area exposure: Total dust - 96,4 and 76.5 ag/eu m 8.3 and 4.0 Respirable dust - 11.6 and 7.6 mg/cu m 3.3 and 1.9 Sanding of joints from 2 preaires Worker exposure (breathing zone): Total dust - 69.2 end 87.3 mg/eu a 9.4 and 10.0 Respirable dust - 3.9 and 6.4. mg/cu m General area exposure: Total dust - 54,9 and 91.3 mg/cu B 5.6 and 1.5 Respirable dust - 4.9 and 7.9 * and 3,1 -* Not calculable because samples too small to analyse for free silica cantect seeded far the calculation. *'*' Tbe 05HA limit amounts vary because they are dependent on the aaour.t of silica present. iidt: l) It is said that the individual worker is unlikely to have roars than 2 hrs. direct exposure to mixing cr sanding each workday. PLTF 0497 05/19/00 20:03 TX/RX NO.0426 P.023 02/12/01 16:31 KMESR -> 1 4 1 0 4 4 8 2 3 6 8 NO. 067 P024/025 iftltr 5UlgiU?.'i 0? GTri'JV ASSOCIATION SZrCr.TS THI?J HSMSI November 1973 tests - Asbestos EUSt (fibers longer than 5 micrometers) OSKA Standard - continuous exposure 5 fibers/ee 0S3A Standard * peak exposure 10 flbers/cc Worker exposure (breathing tone)t Miring: 1st dry compound 2nd dry compound Sanding: 10 min, samples avg 1st dry compound 2nd dry compound 4*1 fibers/ac 1st presir 4.2 2nd premia. 10. S 31.4 fibers/cc 7.6 fibers/cc 10 min, aetttiles ali^uoted 4 redeposited 39.4 fibers/cc 14.8 11.1 9.7 6 of 13 sanding tests (10 min. samples) indicated concentrations in excess of 5 fibers. 2 of 13 sanding tests (10 mia. samples) indicated concentrations in excess of 10 fibers. H O T S : 1) It is said that the individual worker is unlikely to have more than 2 hrs. direct exposure to mixing or sanding each workday. PLTF 0498 05/19/00 20:03 TX/RX NO.0426 P.024 02/12/01 16:31 KMESft 14104492369 K55j IT OF T25T WITH KCC CCMPOL'NSS Y UN'-GK C.J2ZSS Asbestos Dust (fibers longer than 5 micrometers) Worker exposure (breathing zone): Mixing joint compound with drill mixes Mi'Ting finishing compound with potato Basher Sending joint done with Preaix Topping Sending joint done with Premix JAiel Purpose Sanding Joist done with Finishing Compound N O .067 P 0 25-'025 ) II fibers/cc 54.6 ) 1 66.5 1 4.3 1.1 2.B ` \ I VOTE.: Since in no case the Sampling time -was longer than 2 minutes,, these deteashould be used only as general guides to indicate gross relative differences. t iI i ] [ i i i ) PLTF 0499 05/19/00 20:03 TX/RX NO.0426 P.025