United States Department of the Intenor BUREAU OF MINES 0 0 LA SA LLE.

HEALTH EFFECTS OF TALC EXPOSURE l Prepared by Arthur L.

Cyprus Industrial Minerals Company 555 South R ow er S treet Los Angeles, C alifornia 90071 Telephone 213) 439-3700 TWX 910) 321-5753 February 12, 1980 Talc and the OSHA Asbestos Standard 29CFR 1910.1001 Cyprus Industrial Minerals Company's Montana talc based products are free of asbestos as defined by the OSHA Safety and Health Standards (CFR 1910.1001 (a)).

March 1988 Wolf M/C S238 Re Statement of Iblicy on Asbestiform Containing Talc It is the policy of Cyprus Industrial Minerals Company that we will mine beneficiate and sell only those taics that do not contain detectable quantities of chrysotile amosite crocidolite tremolite asbestos actinolite asbestos or anthophyllite practical detection level these asbestos materials asbestos capability We are confident that our current is of the order of 0.1% by weight of Pending resolution of the OSHA regulatory status of the non-asbestiform mineral habits of trernolite anthophyllite and actinolite we will continue to certify that the products we sell will not contain quantifiable these minerals as well as chrysotile amosite and crocidolite to amount quantifiable degree of ZazenskfM/C S-244 RJZ/GJGmc A1 L___ Gordon Gi.U M/C -S-242 Reviewed and Approved M/C 11CC CAM-283 CAMC-Abeyta-001813

THE MEN N 6N COM PANY R** material specifications Eg 1____of 1 SUBJECT: Talc Code Number 10,362 Date : March 19, 1985 Supersedes March 4, 1980 Reason for Revisionchange Microbiological Limits, add Supplier Name Supplier: Cyprus Industrial Minerals Co.

WALK-THROUCH SURVEY REPORT OF 'l'HE TALC BAGGING OPERATION AT Cyprus IndusLrial Minerals Company 1.'

r 4 Cyprus Industrial Minerals Company Interoffice Correspondence ^ u tTf ts EXHIBIT CAM-339 fo Manos Tiritas F'om i.H, Reads Date May 15, 1989 Duncan River Grit Deposit On 5/19, Jay Mooney and I visited a grit deposit located 26.4 Km north of Cooper Creek, British Columbia on the east side of Duncan River (Exhibit I). ' The ore crops out for about 215 feet along the dirt road with a strike of N 60 W and a dip near vertical (Exhibit II).

7881 Calculation of Number asbestos fibers per oz U0654 #fibers counted 1 EFA mm2 1256 #GO 10 GO Area mm2 0.013 Vol Filt ml 1 Dry Wt grams 0.0959 Dry Wt oz* 0.0033828 Asb. fibers/oz Asb. fibers/oz 2.86E+08 286 Million U0655 4 1256 10 0.013 1 0.081 0.002857 1.35E+09 1.4 Billion U1986 3 1256 10 0.013 0.1 0.20567 0.007255 4.00E+09 4.0 Billion * 28.34952 grams per oz Number fibers per oz = (# fibers-cted*EFA*100ml)/(#GO*GO Area*Vol filted*Dry wt) EFA = Effective Area of the filter GO =Grid Opening ~112\ ^ |l7|l PLAINTIFFS EXHIBIT WCD-358

234 GNTER OBERDRSTER TABLE 1 M easured and Norm alized Lung Talc Burden of Rats at the End o f the 4 -Week Inhalation Study o f Talc Exposure concentrations, mg/m3 0 Control 2 (target) 2.3 (actual) 6 (target) 4.3 (actual) 18 (target) ' 17 (actual) Male n tig talc/lung (from NTP report) fig talc/lung per mg/m3exposure concn (% increase over low concn) Female n tig talc/lung fig talc/lung per mg/m3exposure concn (% increase over low concn) 5 4.3 1.6 -- 5 0.58 0.24 -- 5 81.6 2.1 35.5 4 56.5 1.6 24.6 5 186.0 9.3 43.3 (+22%) 5 127.2 9.3 29.6 (+20%) 5 846.0 + 5.5 49.8 (+40%) 5 546.0 35.2 32.1 (+30%) clearance m echanisms, and evidence has been accum u lating th a t these effects are toxicological im plications of a condition of lung "particle overload" (M orrow, 1988).

RESOLUTION OF BOARD OF DIRECTORS OF CARB.OLA CHEMICAL CO., INC.

1 / * Rtillippe Douillet 0he Holyoke lane Stony Brook, New York 11790 Re : Docket No. 83P-0404 Deer Mr.

FUNDAMENTAL AND APPLIED TOXICOLOGY 10, 369-384 (1988) ISSUES Possible Mechanisms to Explain Dust Overloading of the Lungs P.

Draft - 4/11/88 cn n ffliM - CPLAEAXMINH-TIB2IFI7TF1S VERMONT TALC DUE DILIGENCE First thoughts, impressions, and concerns: OVERVIEW This is an excellent opportunity for Cyprus to get into the talc business in Vermont with operating plants and mines.

CAM-273 EPH/11 ir .114 TO: E.

mm mm FUNDAMENTAL AND APPLIED TOXICOLOGY 10, 369-384(1988) ISSUES 499 Possible Mechanisms to Explain Dust Overloading of the Lungs 506 P.