*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER            : VV7336000
CHEMICAL NAME           : Silica, crystalline - tripoli
CAS REGISTRY NUMBER     : 1317-95-9
LAST UPDATED            : 199712
DATA ITEMS CITED        : 19
COMPOUND DESCRIPTOR     : Tumorigen
SYNONYMS/TRADE NAMES :
   * Randanite
   * Silica, crystalline-tripoli
   * Tripoli

                              *** REVIEWS ***
 
   ACGIH TLV-TWA 0.1 mg/m3, respirable 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

   IARC Cancer Review:Animal Sufficient Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 42,39,1987

   IARC Cancer Review:Human Limited Evidence
   IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals
   to Man.  (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210)
   V.1-    1972-  Volume(issue)/page/year: 42,39,1987

   IARC Cancer Review:Group 2A
   IMSUDL IARC Monographs, Supplement.  (WHO Publications Centre USA, 49
   Sheridan Ave., Albany, NY 12210)  No.1-    1979-  Volume(issue)/page/year:
   7,341,1987

                    *** U.S. STANDARDS AND REGULATIONS ***
 
   MSHA STANDARD-respirable dust in air:TWA 10 mg/m3/% resp. SiO2+2
   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

   MSHA STANDARD-total dust in air:TWA 30 mg/m3/% SiO2+3
   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 10 mg/m3/(% resp SiO2+2)
   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 10 mg/m3/(% resp SiO2+2)
   CFRGBR Code of Federal Regulations.  (U.S. Government Printing Office, Supt.
   of Documents, Washington, DC 20402)  Volume(issue)/page/year:
   29,1926.55,1994

                    *** OCCUPATIONAL EXPOSURE LIMITS ***
 
   OEL-BELGIUM:TWA 0.1 mg/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 0.1 mg/m3 JAN 1993
   
   OEL-UNITED KINGDOM:TWA 0.3 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 SILICA, crystalline tripoli-air:10H CA TWA 0.05 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 - 74655
       No. of Facilities: 3594 (estimated)
       No. of Industries: 33
       No. of Occupations: 26
       No. of Employees: 20803 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X9247
       No. of Facilities: 52 (estimated)
       No. of Industries: 1
       No. of Occupations: 1
       No. of Employees: 156 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - X9681
       No. of Facilities: 90 (estimated)
       No. of Industries: 3
       No. of Occupations: 1
       No. of Employees: 1635 (estimated)
   
   NOES - National Occupational Exposure Survey (1983)
     NOES Hazard Code - 74655
       No. of Facilities: 2287 (estimated)
       No. of Industries: 29
       No. of Occupations: 19
       No. of Employees: 22615 (estimated)
       No. of Female Employees: 3267 (estimated)

                          *** STATUS IN U.S. ***
 
   OSHA ANALYTICAL METHOD #ID-125G

 
                            *** END OF RECORD ***