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9 <br /> UNITS USED TO DESCRIBE OCCUPATIONAL EXPOSURES TO HAZARDOUS <br /> ,M SUBSTANCES INCLUDE: EXPOSURE LIMIT, ALSO KNOWN AS THE "THRESHOLD <br /> LIMIT VALUE" {TLV) , CEILING LIMIT, AND THE CONCENTRATION LEVEL <br /> THAT IS "IMMEDIATELY DANGEROUS TO LIFE AND HEALTH" (IDLE) . THE <br /> DEFINES THE MAXIMUM CONCENTRATION OF A SUBSTANCE TO <br /> WHICH ONE CAN BE EXPOSED DURING AN 6 HOUR PERIOD WITHOUT SUFFERING <br /> SIGNIFICANT HEALTH EFFECTS. THE CMILING LIMIT IS THE <br /> CONCENTRATION LEVEL THAT CANNOT BE EXCEEDED AT ANY TIME; i.e., A <br /> SUITABLE RESPIRATOR MUST BE WORN IF CONCENTRATION VALUES REACH THE <br /> CEILING LIMIT. THE IDHL LEYEI. REPRESENTS A MAXIMUM 'CONCENTRATION <br /> FROM WHICH ONE COULD ESCAPE WITHIN 30 MINUTES OF RESPIRATOR <br /> FAILURE WITHOUT EXPERIENCING ESCAPE-IMPAIRMENT OR IRREVErRSIBLE <br /> HEALTH DAMAGE. IDLH VALUES ARE NOT LISTED FOR SUBSTANCES THAT ARE <br /> POTENTIAL HUMAN CARCINOGENS. <br /> EMOURE <br /> SUUB3TANCE EXPOSURE_LIMIT CEILING LIMIT IPLH <br /> BENZENE 0.1ppm (8hrs) 1ppm (15min) CARCINOGEN <br /> TOLUENE 100ppm (10hrs) 200ppm (10min) 2000ppm <br /> XYLENE 100ppm (8hrs) 200ppm (10min) 10OOppm <br /> ETHYL BENZENE 100ppm (8hrs) N.A. 2000ppm <br /> TETRAETHYL LEAD 0.0067PPM N.A. 3.6ppm <br /> PROLONGED EXPOSURES TO CONCENTRATIONS ABOVE THE LIMITS.NOTED MAY <br /> AFFECT THE CENTRAL NERVOUS SYSTEM, CARDIOVASCULAR SYSTEM, <br /> RESPIRATORY SYSTEM, EYES, SKIN, KIDNEYS, BONES AND BONE MARROW. <br /> RESEARCH HAS SHOWN THAT BENZENE IS A KNOWN CARCINOGEN. <br /> IMMEDIATE SYMPTOMS OF OVER-EXPOSURE INCLUDE: EYE IRRITATION, NOSE <br /> AND THROAT IRRITATION, HEADACHE, NAUSEA, DIZZINESS, DROWSINESS, ` <br /> WEAKNESS, CONFUSION, EUPHORIA, EXCITEMENT, STAGGERED GAIT, <br /> ABDOMINAL PAIN, RESPIRATORY DIFFICULTIES, MUSCLE FATIGUE, AND . <br /> COMA. r <br /> DUE TO THE INHERENT PHYSICAL DANGER OF WORKING IN THE VICINITY OF <br /> MOVING HEAVY MACHINERY, ALL PERSONNEL WILL WEAR HARDHATS AND STEEL <br /> TOED FOOTWARE AT ALL TIMES. <br /> PERSONNEL EXPOSURES TO EXCESSIVE JOB-RELATED HAZARDS ARE EXPECTED <br /> TO BE MINIMAL USING THESE SAFEGUARDS. <br /> -- --------IT-SHOULD--BE--NOTED--THAT-SUMMER-TIME--HEAT MAY--INITIATE.WEATHER <br /> __ _—— <br /> STRESS-RELATED PROBLEMS AND DECREASE PRODUCTIVITY ON THE JOB SITE. <br /> SMOKING IS PROHIBITED AROUND OR NEAR THE WORK AREA. <br />