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UNITS USED TO DESCRIBE OCCUPATIONAL EXPOSURES TO HAZARDOUS <br /> SUBSTANC>" INCL['OE: 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" (IDLH) . THE <br /> MEMO= IM= DEFINES THE MAXIMUM CONCENTRATION OF A SUBSTANCE TO <br /> WHICH ONE CAN BE EXPOSED DURING AN B HOUR PERIOD WITHOUT SUFFERING <br /> SIGNIFICANT HEALTH EFFECTS. THE LING 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 REPRESENTS A MAXIMUM CONCENTRATION <br /> FROM WHICH ONE COULD ESCAPE WITHIN 30 MINUTES OF RESPIRATOR <br /> FAILURE WITHOUT EXPERIENCING ESCAPE—IMPAIRMENT OR IRREVERSIBLE <br /> HEALTH DAMAGE. IDLH VALUES ARE NOT LISTED FOR SUBSTANCES THAT ARE <br /> POTENTIAL HUMAN CARCINOGENS. <br /> I <br /> a <br /> NUASTANCE EXPOSURE LIMIT 0$LING LIMIT <br /> c <br /> BENZENE 0.1ppm (Ohre) 1ppm (15min) CARCINOGEN <br /> TOLUENE 100ppm (10hrs) 200ppm (10min) 2000ppm <br /> XYLENE 100ppm (Shrs) 200ppm (10min) 1000ppm <br /> ETHYL BENZENE 100ppm (Ohre) 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. <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 /> k <br /> A <br /> IT SHOULD BE NOTED THAT SUMMER TIME HEAT MAY INITIATE WEATHER <br /> STRESS—RELATED PROBLEMS AND DECREASE PRODUCTIVITY ON THE JOE SITE. <br /> ay SMOKING IS PROHIBITED AROUND OR NEAR THE WORK AREA. <br /> r <br />