Laserfiche WebLink
JOB SAZARD ANALYSIS <br /> g� GASOLINE RANGE HYDROCARBONS <br /> a <br /> The main cxmpound of interest is petroleum range hydrocarbons. <br /> Gasoline and its constituents pose health hazards in two major <br /> classifications: Explosivity and toxicity . The extreme <br /> flammability of gasoline is commonly known. The lower explosion <br /> limit (LEL) of gasoline vapor is 1.3 percent in air If the <br /> concentration of gasoline vapor in air exceeds 1 . 3 percent (13,000 <br /> ppm) and sufficient quantities of oxygen are present, then the <br /> introduction of sufficient heat, spark or flame VIU result in an <br /> explosion. <br /> A lesser known health hazard resulting from exposure to gasoline <br /> is toxicity. Several common constituents of gsoline have been <br /> linked to various health problems. The constituents of gasoline <br /> that have been shown to cause serious health problems resulta.ng ' <br /> from relatively ainor exposures include Benzene , Toluene, meta, <br /> para and ortho xylenes, Ethyl benzene, and Tetraethyl lead. <br /> Typical percentages (by weight) of these constituents in gasoline ' <br /> are; Benzene - 0.12-3.50% , Toluene - 2.73-21 . 80% , meta xylene - <br /> " 1.77-3.87%, para xylene - 0.77-1.58%, ortho xylene - 0.68-3 .686% , <br /> and Ethyl benzene - 0.36-2.86%. typical percentage of Tetraethyl <br /> lead is not available. <br /> units used to describe occupational exposures to hazardous <br /> substances Lnclude: Exposure limit, also known as "Threshold <br /> Limit Value" (TLV) , Ceiling Limit, and the concentration level <br /> that is "Immediately Dangerous to Life and Health" (IDLH) . The ; <br /> defines the maximum concentration of a substance to ; <br /> which one can be exposed during an 8 hour period without suff ering <br /> significant fiealth effects. The CEILING _LIST is the <br /> concentration level that cannot be exceeded at any time. A <br /> t suitable respirator and/or other suitable breathing apparatus and <br /> body protective equipment must be worn if concentration values <br /> reach or exceed the ceila-ng limit. the IDLH LM represents a ` <br /> maximum concentration from which one could excape Within 30 <br /> minutes of respirator failure without experiencing escape- <br /> impairment or irreversible health damage. The notation "Ca" <br /> appears in the IDLE column for all substances that NIOSH considers <br /> to be potential human carcinogens. <br /> 1EXPOSURN TABLE <br /> k <br /> i <br /> 'LV- TLV STSG MY-CHILI HG IDLH <br /> Benzene .01 ppm N/A N/A 3000 ppm (Ca) <br /> Toluene 100 ppm 150 ppm N/A 2000 ppm <br /> t Xylene 100 ppm 150 ppm N/A 1000 ppm <br /> a <br /> 0 <br />