Laserfiche WebLink
4.3.1.4 Xylene <br />Depending on exposure factors, inhalation of xylene vapor may produce central nervous <br />system excitation followed by depression. Exposure to xylene vapor can produce dizziness, <br />staggering, drowsiness, and unconsciousness. At very high concentrations, it may produce lung <br />irritation, nausea, vomiting, and abdominal pain. Xylene is not known to possess the same <br />chronic bone marrow toxicity as benzene, however, liver enlargement and nerve cell damage <br />have been noted from chronic overexposure above the PEL. Ingestion exposure to xylene can <br />produce temporary liver damage and should be avoided. <br />4.3.2 Exposure Limits <br />Some of the substances listed above are mixtures and as such exposure limits are not <br />published. However, there are exposure limits for some of the more hazardous constituents of <br />concern in these substances that may be found at the site. The primary constituents of concern <br />are benzene, toluene, ethylbenzene, and xylene. Health risks may be experienced by inhalation <br />or ingestion of dust, through direct and indirect contact with contaminated soils. <br />4.3.2.1 Permissible Exposure Limits (PEL), Threshold Limit Values (TLV), and <br />Short Term Exposure Limits (STEL) <br />Table B-1 contains the Permissible Exposure Limits (PEL), Threshold Limit Values <br />(TLV), and Short Term Exposure Limits (STEL) for the chemicals of concern. If work shifts are <br />changed from an 8 -hour day, the PEL will be calculated to reflect such a change. <br />io <br />