Document zQXR05zgR0NvVLaoMBbrE5rNz

FILE NAME: Talc (TALC) DATE: 1971 Sept 8 DOC#: TALC424 DOCUMENT DESCRIPTION: Letter to American Conference of Govt Industrial Hygienists from Desert Minerals, Inc. 'V-, +**rj v / f<[3\ j &?: " ` U,pu :>! ?' o hfr- j n:r 1 _j_..,_-Ti vm*T : nu,4 September 8, 1971 Hr. Herbert V., Stokinger, IhD. Cha.rtran, TLV Committee American Conference of Governmental Industrial Hygienists 1014 broadway . Cincinnati, Ohio 45202 Dear Mr. Stokinger: . i . . Under the date of July 21, 1971, you addressed dur Mr. Thomas E. P-cmmers-a letter in regard to the threshold limit valu? for talc under the Occupational Safety and Health Act of 1970. You refer to a value of 20 tnppcf for talc If the talc is non-aabesti6rm;'ihowever, if the talc la of the flbroun-tremolite type, then thsiTLY of five fibers of I n s than five milligrams in length is the standard. You enclosedj;a copy of the Documentation of Talc, fibrous*? itremolite. Thidvappears to Ibefa recommendation rather than a part of^the law. It is not bur intention to question this, but we would like to know whether 'this designation for talcy fibrouB-tremolIte is now a part of the Act; and if iso, has the Department of Labor published it andi under what paragraph or documentation number. : , ; j ' -; ' . ' Paragraph 1910.100 of the Pules and Regulations states that specifications of the Amaricair Cotiference o Governmental.Industirial hav^ beet ; referenced in this subpart and that copies of the standards may be obtained from you. Specifically, reference is made to the various minerals under Table-G-3, Paragraph 1910.93, Page 10,50$. In'this: tabled the only reference to talc is a TLV of 20 mppef. All we want to know is should this regulation be supplemented to include the two types of talc you refer to and their respective values. In order that we may be mori intelligent in our discussions ofitblsM a tte r , it would be*helpful if you would tell us more about the American Conference of Govenimfcntal Industrial Hygienists and how you operate. Thanking you kindly for your help, we remain Yours very truly, DESERT MINERALS, Inc. LJEllsworshskjb President c r MC-h t -t a l c .000107