Document R2dBBqm2MqLv6vOojDgRO3GdV

FILE NAME: Kaiser Gypsum (KG) DATE: 1974 Mar 1 DOC#: KG065 DO CUM ENT DESCRIPTION: Memo RE Dust from Joint Compound Operations Summary of Gypsum Association Reports 02/12^01 16:30 KMESA * 14104402368 KAISER GYPSUM COMPANY, INC NO. 067 P021/025 We have received a grcup of three reporta froo the Gypsum Association 'covering amounts of ashestas and siliceous dusts generated during mixing and sanding of joint compounds on typical Jobs. Tie overall sunrary by the testing agency states, "There was evidence of exposure of workers to airborne concentrations of asbestos and both, total end respirable siliceous dust in excess of acceptable limits as estab lished by GSHA. Because of the high concentrations of total dust gener ated during th- mixing end sanding activities, it is clear that control of the tc.al dust problem would provide an inherent control cf the asso ciated asbestos and silica problems as well." The first report deals with dr7 and presix products from the other five major gypsum tanpanies, with 7.0 C materials not included. The dust sam ples collected were so heavy that reliable tests for asbestos could not be cade, and cnly siliceous dust values are reported. The second report covers a recheck using dry and premix products from i two cf the above companies on siliceous dust values. 1 The third report covers asbestos dust from the products used far the second report. \ summary of the test data is attached. Also attached is a suzeaary of cur own tests on our own products. ACTION PICUIRZD: l) Review e-d recotsrsndatian as to whether asbestos warning labels nay legioinately be removed from our preaix products. The law states that "no label is required where asbestos fibers have been modified by a bonding agent, coating, binder or other materiel 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 only major company carrying the asbes tos warning on its presix and it is costing us business. 2} Reco; n-rdaticn as to ccspany's position on what is next step to be take 1 by the Gypsum Association Study Committee on this project, That ccmxittes is already cn record ir. favor of placing the asbestos warr. "g er.-i a dust warning 0 0 all tags and pails of joint ccscound . JSS/sc Attach.?.*: PLAINTIFF'S EXHIBIT PLTF 0495 05/19/00 20:03 TX/RX NO.0426 P.021 02^12X01 16:30 KMESft * 14104402368 aa*M?.Y cr cipsuu association tz ports NO.067 P022/025 SsTr'Y 5 E 3 3 * FT as? P-TPCr.T Septesber 15"3 tests - Siliceous Dusts (asbestos dust data hot reliable) Mixing of 5 dry powder jeint caacouads (not including Kaiser) Worker exposure (breatking iocs); Total dost - fi.9 to 21.6 ng/cu m 8 hr TWA GSRA Limit ** Respirable dust - 1.3 to 9.1 sg/cu a General area exposure: Total dust - 10.3 to 34,0 cg/cu a Respirable dust - 0.3 to 2.6 tcg/cu a 3.1 to 9.7 * Sanding of Joints from 5 dry powders and 5 prefixes Worker exposure (breathing rone): Total dust - 72.5 to 244.4 fflg/cu a Respirable dust - 1.5 to 5.6 sg/cu a 2.4 to 15.0 * General area exposure: Total dust - 27.7 to 136.7 mg/cu a 4.0 ta 15.0 Respirable dust - 4.4 to 23.0 Eg/cu a C.7 to 5.0 net calculable because samples tso snail to analyse for free silica content needed for the calculation. Respirable dusts are specific size fractions of the total dust. *-" The 0SKA. Unit a-atnxts vary because t present. hiyree dependent g c 115: 1) There oas no significant difference asong dust levels generated by sending Joints which used dry powder compounds versus tbnse which used pre.tix er/apeunds. 2) No en* nar.ufactursr's product was significantly closer to conplyir.g vith 0S K A iicvitj than were the others. 3) It. is raid that the individual *cr'sr is unlikely to have amra thin 2 hrs. dir-rt exrcou.-c to aiding or sanding each workday, PLTF;04P6 05/19/00 20:03 TX/RX NO.0426 P.022 02/12^01 16:30 K M E S f t > 1 4 1 0 4 4 0 2 3 6 S NO.067 P023/025 . stmmay or cypsum rociATiot.1azpgfits " SSSSILS.225C2I November 1973 tests - Siliceous Diets of two dry ponder joist compounds Worker exposure (breathing acne): ! t I i 8 hr m 05EA Limit ** Total dust - 11.7 end 33.6 ag/eu Respirable dust - <8.5 and 6.9 Bg/cu m General area exposure: # I Total dust - 121.6 and 98,3 JBg/cu m Respirable dust - 13.8 and 12.2 mg/cu m Sanding of Joints from 2 dry ponders Worker exposure (breathing zone): Total dust - 109.5 and 156.3 Bg/eu to 6.7 and 5.4 i 1.3 and * I1 j i 8,8 and 5.C Respirable dust - 3*3 and 2.0 Bg/cu a General area exposure: Total dust - 96.4 and 76.5 ag/eu a Respirable dust - 14.6 and 7.6 mg/cu a Sanding of joists from 2 presires 5 . 3 and *0 3-3 and 1.9 Worker exposure (breathing none): Total dust - 69.2 and 87.3 mg/cu a Respirable dust - 3.9 and 6.4 Bg/cu m 5.4 and 10.0 * General area exposure: Total dust - 54.9 and 91.3 cg/cu b 5.6 and 1.5 R espirable dust - 4.5 and 7.9 * and 3.1 Not calculable because sasples too saall to analyse for free silica content n e e d e d for the calculation. "* Tbe OfHA lir.it axsunts vary because they are dependent on the aaour.t of silica present. K 1 X 1 ) It is said that the individual worker is unlikely to have tors than 2 hrc. direct exposure to mixing cr sanding each workday. \ PLTF0497 ; 05/19/00 20:03 TX/RX NO.0426 P.023 02/12/01 1 6 :3 1 KMESA 14104492369 NO. 067 P024X025 S g jjA jg 0? ASSOCIATION HZFORTS THIP-D H5?QS1 N ovem ber 1 9 7 3 t e s t s - A s is s z o s Eust (fibers longer than 5 micrometers) OSKA Standard - continuous exposure 5 fibers/ee QS7A Standard - peak exposure 10 fibers/cc Worker exposure (breathing 2 oae)t Mixing: 1st dry cospound 2nd dry compound Sanding: 10 min, samples avg 1st dry compound --- 2nd dry compound 4.1 fibers/cc 1st preair 2nd presir 4.2 1 0 .8 31.4 fibers/cc 7.6 fibers/cc 10 min, Seattles aliquated 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 ola. samples) indicated concentrations in excess of 10 fibers. MOT S : 1) It is said that the individual worker is unlikely to have more than 2 hre. direct exposure to n.irieg or sanding e a c h workday. PLTF 05/19/00 20:03 TX/RX NO.0426 P.024 02/12/01 IS:31 KMESR - 141B44B23&8 HE5ULT- OF TSST WITH KCC CSMPCUS5S 5Y WIIOK C.JSI5S NO.067 P025/025 Asbestos Dust (fibers longer than 5 micrometers) Worker pcsure (breathing zone): Mixing Joint compound with drill mlxac Mixing finishing compound with potato masher Sending Joint done with Presix lopping Sanding Joint done with Premix IXial Purpose Sanding Joist done with Finishing Compound ) fiber s/cc 1 54.6 66.5 ` *' . '( 1.1 i 2.B K0T5; Since in no case the sampling time was longer than 2 minutes, these datasshouLd be used only as general guides to indicate gross relative differences. t ' !I ) P LTF 0439 05/19/00 20:03 TX/RX NO.0426 P.025