Document 2OV5mOkoRZO0347JQwQzJy16

PLAINTIFF'S EXHIBIT DUP-1465 bcc: Dr. Sidney S. Pollack Carnegie Mellon University fl/l- /3//-0 0 / MR-1311 September 1, 1970 Dr. fldoay Spell Director of taaearch riplng cad Mining Division Johns-Maori11c Corporation Johae-HcarUls leseerch and Inglaaerlng Center Hasvllls, Mar Jersey 08835 Deer Dr. Spellt At the third aeetlnt of the Phlledelphl* Ad Boo Comities on Spreying of Asbestos ineuleelof Materiel on August 4, 1970, I had a brief discussion with you after your presentation. Z neatioaed corn of the vork that we were carrying on in this Coupaay la comeetlon with employee enpoeeree to esbeetoe fiber duet. As part of the Investigation we have had sons x-ray diffraction analyses serried out for us by an outside laborstory, one of the niaerals that has been identified la our arterial is Oruaarlte, which la described as a type of enthopbylllte sad has the approximate conpoaltlon (fcO. 9 MgO) 7012 lg022. The x-rsy diffraction laboratory baa need of a standard sample of Oruaarlte. Would it be possible for yon to provide as with 50 or 100 milligram of such saterial, or could yon tell ae where l nay obtain sush a staple! Thanh you far your help. Kindest regards. jm/jtd Sincerely, ORIGINAL SIGNtO Y JAMES f. MORGAN janes t. Morgan OUP 097362S DU 045229 ,f//- 6 / September 28, 1970 Oar, Sidney s. Pollack Halloa Institute 4400 Fifth Avaauo Pittsburgh, Pa, 15213 oaar Sid* Under sapaxata oovar X an landing you a sanple of Osunarita for usa aa an internal standard, Enclosed is a copy of a letter which dasoslbea the origin of this saaple, X aa also sanding you a oopy of an alaotroa photomicrograph, X should like to disouss with you at your earliest con venience at Mellon Institute the results you have obtained to data on the staple* X sent you on August 12, 1970. Please let me know of a data that would be agreeable to you. one day next week would be agreeable to me. Kindest regards, Sincerely, JTH/bjd Sncls,(2) Janes T. Morgan^ Bnolosuresi (1) Xerox copy of letter of September 16, 1970 of Dr. Sidney Spell to Mr. Janes 7. Morgan on Qrunarite. (2) Electron photomicrograph of Orunerite. DUP 0973626 DU 045230 m Johns-Manville Rtuarch t Englrttrfng Ctnttr P, 0. Sox 159 Manvtllo. N. J. 08435 (201)722-9000 September 16, 1970 Mr. Jamas F. Morgan E. I. duPont de Nemours & Company Employee Relations Department Wilmington, Delaware 19898 Dear Mr. Morgan: It was a pleasure hearing from you. I am particularly intri gued by the identification of Grunerite in what I presume is a dust sample at one of your locations. Grunerite is an amphibole which in most mineralogy books is indicated as being fibrous or columnar. We do not normally regard it as a member of the asbestos family of amphiboles since it is so harsh that it does not yield a "fibrous" product. Under separate cover I am sending to your attention a sample of Cummingtonite schist from the Homestake Mining Company in Lead, South Dakota. This material has been identified by us as Grunerite with a slight impurity. Attached are the approx imate analyses and an electron micrograph of the material. Confirming our discussion at Philadelphia, we would be very glad to discuss with you at any time your program in connection with employee exposures to asbestos fiber dust and offer any assistance based on our long experience in this field. SS/rs L'cHTil IH70 'M3KEU. Li-lv`l5'\T DUP 0973627 DU 045231 inisiiisi.js . iMiiaBfciiaiiiMMii .iaiiiaaiia,.-- LiSM Mr. James F..Morgan E. X. duPont Attachment September 16, 1970 Analyses of Grunerite Sample Sample Description: Cummingtonite Schist from - Homestake Mining Company Lead, South Dakota Sample No. 3647-152-1 X-ray Identification; Grunerite [(Fe, Mg) 7 (OH) 2 Sig022j and a trace of chlorite. Petrographic; Major - araphibole mineral with optical properties close'to grunerite, a member of the cummingtonite series. Minor - chlorite Spectrographic: Major - iron, magnesium, silicon Minor High - aluminum (5-10%) Minor Low - calcium (1-5%) Small ( < 1%) - manganese, sodium Very Small - chromium, copper, titanium, zirconium (< 0.1%) Electron Micrograph Attached S. $p4il OUP 0973628 DU 045232