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1 111,11 , <br /> M <br /> o Wmll- <br /> a1 '� ArC^ "r '.y1 +.'� 3 `t. t�'vr n'"i! P �st'.af �."it. 1 G 1 uT r iL�t <br /> u' <br /> d <br /> 1 <br /> UNITS USED TO DESCRIBE OCCUPATIONAL EXPOSURES TO HAZARDOUS <br /> SUBSTANCES INCLUDE: EX70SURE LIMIT, ALSO KNOWN AS THE "THRESHOLD <br /> LIMIT VALUE" (TLV; , CE,[LING LIMIT, AND THE CONCENTRATION LEVEL <br /> THAT IS "IMMEDIATELY DhNGEROUS TO LIFE AND HEALTH" (IDLIi). THE <br /> maqmm&,LIm= DEFINES THE MAXIMUM CONCENTRATION OF A SUBSTANCE TO <br /> WHICH ONE CAN BE EXPOSED DURING AN B HOUR PERIOD <br /> ISW�EOUT SUFFERING <br /> SIGNIFICANT HEALTH EFFECTS. 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 TDHL L> 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 /> MQUEE TALBLE <br /> SUBSTANQE EXPOSURE CEILING LIDLH <br /> BENZENE O.lppm (Bhrs) 1ppm (15min) CARCINOGEN <br /> TOLUENE looppm (l0hrs) 200ppm (lomin) 2000ppm <br /> XYLENE looppm (®hrs) 200ppm (10min) 1000ppm <br /> ETHYL BENZENE looppm (Bhrs) N.A. 2000ppm t <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 TIME 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 /> STRESS-RELATED PROBLEMS AND DECREASE PRODUCTIVITY ON THE JOB SITE. <br />