ARCHIVED REPORTS XR0008160 - Laserfiche WebLink

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i CONCENTRATION OF GASOLINE VAPOR IN AIR EXCEEDS 1 . 3 PERCENT (13,000 PARTS PER MILLION) AND SUFFICIENT QUANTITIES OF OXYGEN ARE PRESENT, THEN THE INTRODUCTION OF SUFFICIENT HEAT, SPARK, OR FLAME WILL RESULT IN AN EXPLOSION. f A LESSER KNOWN HEALTH HAZARD RESULTING FROM EXPOSURE TO GASOLINE € IS TOXICITY. SEVERAL COMMON CONSTITUENTS OF GASOLINE HAVE BEEN LINKED TO VARIOUS HEALTH PROBLEMS . THE CONSTITUENTS OF GASOLINE i THAT HAVE BEEN SHOWN TO CAUSE SERIOUS HEALTH PROBLEMS RESULTING i FROM RELATIVELY MINOR EXPOSURES INCLUDE BENZENE, TOLUENE, meta. I para, and ortho XYLENES, Fray• BENZENE, AND TETRAETHYL LEAD. TYPICAL PERCENTAGES (BY WEIGHT) OF THESE CONSTITUENTS IN GASOLINE ARE: BENZENE - 0 . 12-3 .50% , TOLUENE - 2. 73-21 . 80% , meta XYLENE - 1 . 77-3 . 87% , para XYLENE - 0 . 77-1 .58%, ortho XYLENE - 0 . 68-2 . 686%, AND ETHYL BENZENE - 0 . 36-2 . 86% . TYPICAL PERCENTAGE OF TETRAETHYL LEAD IS NOT AVAILABLE. I UNITS USED TO DESCRIBE OCCUPATIONAL EXPOSURES TO HAZARDOUS SUBSTANCES INCLUDE: EXPOSURE LIMIT, ALSO KNOWN AS THE "THRESHOLD LIMIT VALUE" (TLV) , CEILING LIMIT, AND THE CONCENTRATION LEVEL THAT IS "IMMEDIATELY DANGEROUS TO LIFE AND HEALTH" ( IDLH) . THE EXPOSURE LIMIT DEFINES THE MAXIMUM CONCENTRATION OF A SUBSTANCE TO WHICH ONE CAN BE EXPOSED DURING AN 8 HOUR PERIOD WITHOUT SUFFERING SIGNIFICANT HEALTH EFFECTS . THE CEILINGLIMIT IS THE i CONCENTRATION LEVEL THAT CANNOT BE EXCEEDED AT ANY TIME; i.e. , A SUITABLE RESPIRATOR MUST BE WORN IF CONCENTRATION VALUES REACH THE CEILING LIMIT. THE IDHL LEVEL REPRESENTS A MAXIMUM CONCENTRATION . FROM WHICH ONE COULD ESCAPE WITHIN 30 MINUTES OF RESPIRATOR FAILURE WITHOUT EXPERIENCING ESCAPE-IMPAIRMENT OR IRREVERSIBLE HEALTH DAMAGE. IDLH VALUES ARE NOT LISTED FOR SUBSTANCES THAT ARE POTENTIAL HUMAN CARCINOGENS. EXPOSURE TABLE SUBSTANCE EXPOSURE LIMIT CEILING _LIMIT IDLH BENZENE 0 . 1ppm ( 8hrs ) Ippm ( 15min) CARCINOGEN TOLUENE 100ppm ( 10hrs ) 200ppm (10msn) 2000ppm XYLENE 100ppm ( 8hrs ) 200ppm (10min) 1O00ppm ETHYL BENZENE 100ppm ( 8hrs ) N.A. 2000ppm TETRAETHYL LEAD 0.0067PPM N.A. 3 . 6ppm PROLONGED EXPOSURES TO CONCENTRATIONS ABOVE THE LIMITS NOTED MAY AFFECT THE CENTRAL NERVOUS SYSTEM, CARDIOVASCULAR SYSTEM, RESPIRATORY SYSTEM, EYES , SKIN, KIDNEYS , BONES AND BONE MARROW. RESEARCH HAS SHOWN THAT BENZENE, TETRACHLOROETHYLENE, CIS 1 . 2 .- DICHLOROETHYLENE AND TRICHLOROETHYLENE ARE KNOWN CARCINOGENS. �� IMMEDIATE SYMPTOMS OF OVER-EXPOSURE INCLUDE: EYE IRRITATION, NOSE