*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : VV8760000
CHEMICAL NAME           : Silicate, mica
CAS REGISTRY NUMBER     : 12001-26-2
LAST UPDATED            : 199712
DATA ITEMS CITED        : 19
SYNONYMS/TRADE NAMES :
   * Silicates : mica
   * Suzorite mica

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 3 mg/m3, total dust
   DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices
   (BEIs) booklet issues by American Conference of Governmental Industrial
   Hygienists (ACGIH), Cincinnati, OH, 1996  Volume(issue)/page/year:
   TLV/BEI,1997

                    *** U.S. STANDARDS AND REGULATIONS ***
 
   MSHA STANDARD-air:TWA 20 mppcf
   DTLWS* "Documentation of the Threshold Limit Values for Substances in
   Workroom Air," Supplements. For publisher information, see 85INA8.
   Volume(issue)/page/year: 3,33,1973

   OSHA PEL (Gen Indu):8H TWA 20 mppcf, respirable dust
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1910.1000,1994

   OSHA PEL (Construc):8H TWA 20 mppcf, respirable dust
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1926.55,1994

   OSHA PEL (Shipyard):8H TWA 20 mppcf, respirable dust
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1915.1000,1993

   OSHA PEL (Fed Cont):8H TWA 20 mppcf
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   41,50-204.50,1994

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-AUSTRALIA:TWA 2.5 mg/m3 JAN 1993
   
   OEL-BELGIUM:TWA 3 mg/m3 JAN 1993
   
   OEL-THE NETHERLANDS:TWA 5 mg/m3 JAN 1993
   
   OEL-SWITZERLAND:TWA 3 mg/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 1 mg/m3 (resp. dust) JAN 1993
   
   OEL-UNITED KINGDOM:TWA 10 mg/m3 (total dust) JAN 1993
   
   OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
   
   OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV

         *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA ***

NIOSH RECOMMENDED EXPOSURE LEVEL (REL) :
   NIOSH REL TO SILICATES (<1% CRYST. SILICA): MICA-air:10H TWA 3 mg/m3
REFERENCE :
   NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of
   Health, Education, and Welfare, Reports and Memoranda.
   Volume(issue)/page/year: DHHS #92-100,1992

NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA :
   NOHS - National Occupational Hazard Survey (1974)
     NOHS Hazard Code - 48535
       No. of Facilities: 12333 (estimated)
       No. of Industries: 135
       No. of Occupations: 98
       No. of Employees: 169296 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X1564
       No. of Facilities: 9 (estimated)
       No. of Industries: 2
       No. of Occupations: 3
       No. of Employees: 296 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 48535
       No. of Facilities: 24854 (estimated)
       No. of Industries: 179
       No. of Occupations: 103
       No. of Employees: 348592 (estimated)
       No. of Female Employees: 36684 (estimated)

                          *** STATUS IN U.S. ***
 
   EPA TSCA TEST SUBMISSION (TSCATS) DATA BASE, JUNE 1998

 
                            *** END OF RECORD ***