Document V3dqBrrymGbBRQ7mBGbwxrYrj

FILE NAME: Kaiser Gypsum (KG) DATE: 1974 Mar 1 DOC#: KG065 DOCUMENT DESCRIPTION: Memo RE Dust from Joint Compound Operations Summary of Gypsum Association Reports 02/12/m 16:30 KMESft > 1 4 1 0 4 4 8 2 3 6 8 kaiser GYPSUM COMPANY, INC. N O .067 P021/025 V" J 4 I I ( I INTER-OFriCE MEMORANDUM G. B. Kirk at Oakland o*re March 1, 1971 co-tc* TO J. W. Blftw-tt (via G3K) T. V. Smith H, L. Weight __________ A . F . rLSLl a e l ii /^T F" " j ,v^. Sheahan At Antioch 2 i ) 1 1 C, VH iCf 3u jct DOST FRO/ JO PET g g Q U n D j o b OFIRAXIOHS FI A. 1.0 00022 W<s have received a grcu? of three reports from the Gypsum Association covering amounts of .s]i"s-$s$ and siliceous dusts generated during and sanding of joint compounds on typical Jobs. The overall su-^ary 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- fcy C5SA. Because of the high concentrations of total dust eerier- a Ied.cuf '-= the mixing and sanding activities, it is clear that control of t~e tota_ dust problem would provide an inherent control cf the assa- 5b 4 p+*obXs3* S w11 .w ^ The first report deals with dry and premix products free theother five r =ajOT gypsum companies, with I'.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 premixproductsfrom j two tf tne above companieson siliceous dust values. i The third repo., covers asbestos dust from the products used for the second retort. ' summary of the test data is attached. Also attached is a summary of orr own tests an our own products. ACTION R5CUI5-3. 1) Review end_ recommendation as to whether asbestos warming labels ay r " r "7 Ll;?i?' ^ e .reaovef f;ron premia products. The law states n o ., 1S where asbestos fibers have been if led y s^ccnci^g' a ^ t / coating, binder or other ifcaterial so that durih^ *7^ foreseeable use. no airborne Concentrations of asbes- ^~"jrfr "1* excess of the prescribed exposure limits will be ^8-ease-. ^ Our ^company is the cr.ly major company carrying the asbes- -os wa--tr.g on tts presax and it is costing us business. 2) on as to company's position on what is next step to be Association Study Committee on this orojeer. warn i '5 tr.i e= is already a dust cn record in oo all bags favor of placing the asbestos and pails of joint ccnccunc . JSS/sc A. .s* .ne *_ PLTF 0495 05/19/00 20:03 TX/RX NO.0426 P 021 02X12X01 16:30 KMESf) 14104482360 SOlglARY CF GY?5U*t ASSOCIATION 7ZPOST5 NO.067 P022X025 w w *^v ElaST -?.T?Cr.1 September 15" 3 tests - Siliceous Dusts (asbestos dust data not reliable; Mixing of 5 dry pcwder joint compounds (not including Kaiser) Worker exposure (breathing toea); 6 hr TWA QSHA Limit ** Total dust - S.9 to 21.6 cg/cu a * Respirable dust - 1 . 3 to 9.1 ng/cu a * General area exposure: Total dust - 10.S to 34,0 cg/cu a 3.1 to 9.7 Respirable dust -- 0.S to 2.6 teg/cu a Sanding of Joints from 5 dry powders and 5 prefixes Worker exposure (breathing tone): # ' Total dust - 72.5 to 244,4 ng/cu a Respirable dust - 1.5 to 5.6 ag/cu a 2.i to 15.0 General area exposure: Total dust - 27.7 to 136. 1 mg/cu a Respirable dust - 4 . 4 to 23.0 Eg/cu m 4.0 to 15.0 0.7 to 5.0 net calculable because samples too small to analyse Car free silica content needed for the calculation. Respirable dusts are specific sine fractions of the total The OSKA present. it arounts vary because they art depend it on the amcur.t cf silica 1) There vp.s no significant difference anong dust levels generated by sending Joints which used dry powder compounds versus those which used pre.tix erapounds. 2 ) 0NSoKAone1 --Z2< Lftahcatnurwaerr'es tphreoduoctthewrass, significantly closer to comp*lying eith 3) Tv is 4 that the individual worker is unlikely to hove more than 2 ftrs. r|-- 0 * rcJU fencing eacn we sy. PLTF:049>B 05/19/00 20:03 TX/RX NO.0426 P.022 02/12^01 1 6 :3 0 KMESft - 14104402368 N O .067 P023/025 r.i . . S?.j.3-s,y or CY?suvi a s s o c i t lot.1 az?cats " SECCKD -gFCST November 1973 tests - Siliceous Dusts Uixir.g of two dry powder joist compounds Worker exposure {breathing acne) : Total dust - 11.7 end 33.8 ag/ieu a Respirable dust - <8.5 and 6.9 asg/cu a General area exposure: ! f ) i ! 8 hr TUX 05 EA Limit ** Total dust - 121.6 a&d 92.3 mg/cu m Respirable dust - 13.S a&d 12.2 mg/cu m Sanding of Joists from 2 dry powders Warier exposure {breathing zone): Total dust - 1G9.5 and 196.3 fcg/eu m Respirable dust - 3*3 and 2.0 ag/cu m . General area exposure: Total dust - 96,4 and 76.5 ag/eu & Respirable dust - U . 6 and 7.6 ng/eu m Sanding of joists from 2 prssixes Worker exposure (breathing sane): Total dust - 69.2 end 87.3 cg/eu a Respirable dust - 3.9 and 6.1 mg/cu m General area exposure: 6.7 and 5.1 1.3 and * i 8.8 and 5.0 i 8.3 and 1.0 3.3 and 1.9 i . 9.1 and 10.0 * Total dust - 54,9 and 91.3 eg/cu m 5.6 and 1.5 Respirable dust - 1.9 and 7.9 * and 3,1 * Ns* calculable because sasples too small to analyse for free silica content seeded far the calculation. . "* The 05HA limit amounts vary because they are dependent on the aaour.t of silica present. HC15: 1) It is said that the individual worker is unlikely to have tors than 2 hrs direct exposure to mixing or sanding each workday. : PLTF 0497 05/19/00 20:03 TX/RX NO.0426 P.023 02,'12,'01 16:31 KMESR -> 14104482368 SKflUF.'i 0? CrrSlV. ASSOCIATION SZrCr.TS NO. 067 P024,i'f0t2l5tr THT?3 HSMSI November 1973 tests - Asbestos Hist (fibers longer than 5 micrometers) QSHA Standard - continuous exposure 5 iibers/ee 0S3A Standard - peak exposure 10 fibers/cc Worker exposure (breathing tore)t Mixing: 1st dry expound 2nd dry cexpound Sanding: 10 min, samples avg 1st dry compound 2r.d dry compound 4.1 fibers/ac 1st presix 2nd presix 4-2 10. S 31.4 fibers/cc 7.6 fibers/cc 10 min. Beanies all$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. Z of 13 sanding te3ts (10 min. samples) indicated concentrations in excess of 10 fibers. H O T S : ' l)' 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 P025-'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