Document RJ76x7wx63MrOpVxyBZO4k39a

I W. H. REYSEft COHTAM CONyiD;,7 IAl. SEP 19 # /. Pii* Mo. 8A3S-1 c / ^ YTtCA-L KFSEAftCh DtPAft~.HF.VT RPORT ADP .flttJ----- Subject Examination at Talca for the Praaance of Asbestos ___________________________________________________ Q64-1Q9 Manufacturer Various . Cuatoaar Department________Analytical Rcnearch_____________________ ________ Requested by________ R. W. Scott____________ Data Connieted 9/15/72 r_.`, < ' ABSTRACT . . There arc* fifteen'differant talea in oae for Chicago Production. V>- Pour of these vara analyzed and reportad in AIP-8435. The additional aloyen talca ere analysed and reportad herewith. *e Microscopic mij X-ray eoalyiia Indicate that among the fifteen talca,- rlx are- relatively d e a n , the rest are aora or lese contaminated by tronolite which la a mineral classified aa aabeatoB. The git clean talca oral - . *. ' . ~ > 6a 23 00 p62 3d 00 Tale, Vary P U XIcrone Talc 549 \62 20 25 s 20 26 30 21 32 23 i Klatron HC&-75 . ' total 4190 total 4L - Talc ' TCUI Tele Tailings . >v .. 7 m ?!y. . > .* _ a ' P L A IN T IF F S EXHIBIT WCD-228 Analyst ?2. Dr. Frank H. Chung/c chard W. Scott, Director Analytical Restarci Department Sbervlo-Ulllinea Reaaarcb Center i SW GOODHUE 000008 COMPANY CONFIDENTIAL ADP-8661 PUnPOSE In order to be prepared Co comply with Che Illinois Asbestos Emission Regulations which might apply to Che painc industry, lout Calcs used for Chicago Production were analysed for fibrous asbestos. The results of Chat analysis were reported in ADP-8635. As Informed by Joe Thornton, there are actually fifteen different talcs in use la Chicago Production including Che four talcs analyzed. It was therefore requested that the presence or absence of fibrous asbestos in the additional eleven tales be determined, CONCLUSIONS Eleven additional talcs were analyzed by microscopic and X-ray diffraction methods. The results indicate that among the total of fifteen different talcs the following six are relatively clean. Code Name SnppHnr 62 23 00 Talc, Very Pine 62 36 00 62 20 25 62 20 26* 62 30 21* 62 32 25. *. Micrcrae Talc 569 Miatron HGD-75 Bmtal 6190 Eatal - Talc Toxaa Talc TatHuge Eastern Magnesia Uhleaksr, Clark and Daclela United Sierra Eastern Magnesia Whitaker, Clark and Daniels United Sierra Eastern Magnesia Eastern Magnesia ,* Whitaker, Clark and Daniels * Reported in ADP-8635. The first two are the cleanest. The last one la of much larger particle Size. ' I Generally, the talcntfroa the same supplier have similar character istics , Judging by the rJEulta of this analysis, the characteristics of the products of the s ix ' suppliers are ea follows (1) Eastern Magnesia Talc (EM): Relatively clean talcs of fine particle size. (Z) Whitaker, Clark and Daniels (VCD): Relatively clean talca, coarse particle size sometimes. (3) United Sierra (OS): Uniform particle alze, some grades are clean talca, some grades ere contaminated with trenollte. t SW GOODHUE 000009 COMPANY CONFIDENTIAL ADP-8461 -2- <4) Desert Ilinerals (DM): fine particle size with a email amount of trcmolite. (5) New York Talc (NY): Contain* crystal needles of various longth9 and width, contaminated with creoiollce. (6) International Talc (IT): Contains crystal needles and/or fibers, contaminated with asbestos, RESULTS The results of microscopic and X-ray diffraction analysis are listed below Including the four calcs previously reported (ADP-8435). The .sequence of listing la In accordance with their degrees of contamination. The eix clean talce are listed first, the more contaminated ones ere listed last. Talcs from ths sana supplier are grouped together if possible. For the sake of simplicity, the initials of various suppliers are used In the first colunn of the llet. One complete set of Polaroid microphoto graphs Is attached to R. W. Scott's copy of this report. . They are available to anyone who is interested. * Semple, Code and Supplier Observations MLcroscopy X-Ray Diffraction 62 23 00, Talc, Very Pine, ZH, US, WCD Pine powder of rether uniform particle else and shape. The apparent particle alee la about l-5p. Pew prismatic cryatale (tods) of , larger sizes..' Clean talc, Mg,S1.0l6(OH),, ASTM Card 13-550. . 62 34 00, Hicrone Talc 5, EM, WCD Vary similar to 62 23 00. Cleon talc, Mg,Sl0k(0U)3l ASTM Card 13-558. 62 20 25, Very alMllar to 62 23 00. Mistroc HGIW5, US .....- IT Clean talc, Mg,SlkOt(0H)a, ASTM Card 13-558. 62 20 26, . ' Bmtai 4190, EM Vary similar to 62 23 00. (See ADP-8435) Clean talc, Mg,Si,04(>(0B),, ASTM Card 13-558, but not aa clean as 62 23 00. 62 30 21, Emtal 41Talc, EM Very similar to 62 23 00, but coarser in particle size. (See ADP-8435) Clean talc, Hg,Si(,0iO(0H)a, ASTM Card 13-558. Xta X-ray diffraction pattern la very similar to that of 62 20 26. SW GOODHUE 000010 COMPANY CONFIDENTIAL ADP-8461 -3- Sam ple, Code and S u p p lie r M lcrnacupy Observations X-ttey D iffr a c tio n 62 32 25, Texas Talc Tailings, UCD. Preteles are much coarser than that of 62 23 00 with a wide particle size distrib ution. larger par ticles are up to 30p in diameter. No needles or fibers were observed. Mainly talc, MgjSi.O,(OH),, ASTM Card 13-558. Small amount of antigorlfce, ASTM Card 7-417. No detectable tremollte. ,62 40 00, Talc, Soap stone, WCD. It has a gray color while all the other talcs art uhlta. Its particles are still coarser than that of 62 32 25, but its par ticle size distribution is narrower. Talc, Hg.Sl*0,e(0H)a, ASTM 13-558. Magnesium Chamoalta, ASTM Card 5-0146. Very amali amount of tremollte, ASTM Card 13-437. 62 20 26, matron MSC, PS Similar to 62 23 00 In particle-size but has many crystal needles. (See ADP-8435) Talc, MgiSlfcOie(OH)), ASTM Card 13-558. Tremollte, CaaMg,Sl0ii(0B)*, ASTM Card 13-437. 62" 33 00 Talc, Mlstron, T-076, OS Similar to 62 20 24 In Same as 62 20 24 but appsars ? 'particle alza and shape.-' to contain more tremollte. The crystal needles are * larger in aunbar and longer lsngth. - ; ' ' # t 62 20 21 Very similar to 62 33 00 Same as 62 33 00 but contains Nytal 400, Talc, In every respect under the one additional component Vanderbilt, NT microscope. (See ADP-8435) chrysotlle, ASTM Card 9-444. 62 32 00 Similar ICO 62 33 00 but Same as 62 20 21, la, Nytal Nytal 300, Talc; uuch c<^or. It contains 300 and Nytal 400 arc tha NY t many laf^\e prismatic same aaeerlal, the forrnor .' . .cryatalar of size up to Is much coarser: . . ' .0 20 a 40u and same, real long -- ' . needle crystals of size about 2 x 500p.- 62 35 00 Talc, FlakyGranular, Very Fine, IT, DM Fine powder of particle size Similar to 62 40 00 but about l-5u, oeay crystal contains less talc more needles of obout 1 x 15p, ehanoalte, approximately a few larger prismatic the asms amount of crystals of about 10 x 120u tremollte. In size. I SW GOODHUE 000011 COMPANY CONFIDENTIAL ADP*8461 Sample, Code nnd Supplier Observtloos Mleroacopy X-R.iv Diffraction 62 36 24, Similar to 62 35 00 in Talc, Hi-Fine 80, particle size and shape. DM Talc, NgSi*0,0(0H),, ASTM Card 13-558, Tremolite, CaaMgjSi.O,, (0H)a, ASTM Card 13-437. 62 22 00, Talc, Asbestine, 5X, IT Similar to 62 35 00, but the crystal needles are several times longer end the prismatic crystals are 2 to 3 times wider. Talc, Mg,SI4,0^(OH)a, ASTM Card 13-558, Tremolite, ASTM Card 13-437. Probably contains small amount of chryaotlle aebeatos, ASTM Card 9-444. 62 21 21, Talc, Fibrous, IT * It la composed of the Same as 62 22 00. It appears following: that both 62 21 21 and 1. Pine powder of parti- 62 22 00 are of the some cla size In the l-5u range. material but different 2, Some prismatic cry grinding grades, the latter stala of about 16 x 45y has finer particle size. in size. 3. Some orystsl needles 1 of size about 1 x 45u. 4. Small amount of . fibers of size up to 18 X 400u, each la a ; bundle of parallel fibrils. .a * * . S d i s c u s grow.- All ehe samples ware obtained from the mill room in the Research Canter except 62 21 21 end 62 32 25 which ware submitted by Joe Thornton. In cases where there, are several suppliers o f the talcs with the ssma code number, the ossm of the supplier of the specific talc sample analyzed la not available.* * . ff ... . It la noticeable that.the talcs from Eastern Magnesia are oil clean, while those from Desert Minerals and Bar York talc are all contaminated. The talcs from Whitaker, Clark and Daniels and United Sierra may or may not be contaminated with tremolite. Microscopic observations reveal the color, particle elze, and particle ohape. X-ray diffraction analysis give? the chemical compo sition and crystal structure of the sangle. Materials of. different chemical composition and/or different crystal otructuro might look alike under the microscope. ) SW GOODHUE 00012 C O W ANT CONFIDENTIAL APP-S461 -5- Both tthryaotlle (aabeato) and antlgoritee (noo-aabcstM) approrlat to the B aa* formula Mg,6i,0(OH)* and hava vary girellar X-ray powder pat t a m o a l t h o u g h t h e chryaotllaa ara fIbroua end the antigarite* are lamellar. Microscopic examination Is very helpful for their differentiation. W m t X .-a . - r ." ' . : aHwa V> I F SW GOODHUE 000013