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1 <br /> The points of attack for both TEL and TML are the central nervous system, cardiovascular system, <br /> kidneys and eyes. The acceptable method for monitoring lead contamination in humans is hair or <br /> blood analysis. The permissible level of lead in blood is 70 micrograms/milliliter. The airborne <br /> PEL is 0.1 mg/m3, and is determined by air monitoring and analysis by NIOSH Method 7300. <br /> Other constituents of gasoline can include but are not limited to benzene, toluene and xylene. <br /> Exposure to there compounds can cause nausea, dizziness, visual disturbances, narcosis and <br /> collapse. Chronic effects include central nervous system disorders, respiratory .tract irritation, <br /> tearing, lassitude and immunological disorders. <br /> The PELITLV (permissible exposure limit, threshold limit value), STEL (short term exposure limit) <br /> and IDLH (immediately dan9erous to life and health) values are listed below: <br /> PELITLV STEL IDHL <br /> Lead 0:1 mg/m3 <br /> Tetraethyllead 0.075 mg/m3 0.3 mg1m3 40 mg/m3 <br /> Tetramethyllead 0.07 mg/m3 0.5 mg/m3 40 mg/m3 <br /> Benzene 10 ppm 25 ppm 2,000 ppm <br /> Toluene 100 ppm 150 ppm 2,000 ppm <br /> Ethylbenzene 100 ppm 125 ppm 2,000 ppm <br /> Xylene 100 ppm 150 ppm 10,000 ppm <br /> Diesel Fuel <br /> The 'hazardous constituent of diesel fuel is benzene. Benzene comprises approximately 0.002 to <br /> 0.011% of the total fuel mixture. Dermal contact with diesel fuel can cause minor eye irritation and LL <br /> dermal rash. Prolonged breathing of vapors can impact on, the central nervous system. Diesel f <br /> fuel is not generally expected to have acute systemic toxicity by ingestion. Ingestion of diesel fuel <br /> and/or subsequent vomiting can result in aspiration of light hydrocarbon liquid which can cause <br /> pneumonitis. There is no Federal or State OSHA PEL or ACGIH TLV standard established for <br /> diesel fuel. <br /> 3.3 HEAT STRESS <br /> Adverse climatic conditions (both heat and cold) are important considerations in planning and <br /> conducting site operations. Ambient temperature-effects can include physical discomfort, reduced <br /> efficiency, personal injury and increased accident probability. <br /> Heat stress is of particular concern due to the prevailing climactic conditions in Califomia. All G <br /> anrprnn,_r.iat_ nrnr dunc r <br /> p � qnrF <br /> following control measures can be used to help control heat stress: .I <br />