Document V3JQdVLL8Z80Lw3xxL6eYge5q

FILE NAME: RT Vanderbilt (RTV) DATE: 1971 Sept 8 DOC#: RTV154 DOCUMENT DESCRIPTION: Letter to American Conference of Govt Industrial Hygienists from Desert Minerals, Inc. September 0, 1971 Hr. Herbert E, Stokinger, IhiD. Cha. riran, TLV Committee American Conference of Governmental 1014 Hroadway Cincinnati, Ohio 45202 Industrial Hygienists Dear Hr. Scokinger: Under the date of July 21, 1971, you addressed dux Mr. Thomas P.cmmers a letter in regard to the threshold limit value for talc under the Occupational Safety and health Act of 1970. You refer to a value of 20 mppcf for talc if the talc ia non-aabestifdrm;' however, if the talc la of the flbroun-tremollte type, then theiXLV of five fibers of I n s than five milligrams in length is the standard. You enclosed "a copy of the Documentation of Talc, fibrous*? tremolite. Thief appears to ,be|a recommendation rather than n part of the law. It is not bur iritehtion to question this, but we wo u l d like to know whether this designation^6rftalc, fibrouo-tremolite is now a part of the Act; and if iso, has the Department of Labor published it and under what paragraph or documentation number. Paragraph 1910.100 of the Pules and Regulations states that specifications of the American Conference of Governmental Industrial Hygienists have heat ; referenced in this subpart and that copies of the otandards;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 table, the only reference to talc is a TL7 of 20xmppcf. iAll 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 off this Jmettef,; it would befhelpful if you would tell us more about -the American Conference of Governmental Industrial Hygiehiata; and how you operate. Thanking you kindly for your help, we remain Yours Very truly, ' DESERT MINERALS, Iric. bJElleworthskjb President ' . ceM C .KT-TAI.C.000107