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Toluene can enter the body through all four routes of exposure: (1) inhalation; (2) absorption; (3) ingestion and (4) injection. Target organs are the central nervous system, liver, kidneys and skin. Acute exposure effects include fatigue, dizziness, headache, euphoria, dilated pupils, paralysis. The PEL for toluene is 200 ppm. Ethyl Benzene: Ethyl benzene is a colorless liquid with an aromatic odor. It has a relatively low volatility (vapor pressure = 7.1 mm Hg @ 68 F) and may possibly be present in both the liquid and vapor state. The flash point of ethyl benzene is 59 F classifying it as a flammable liquid. Ethyl benzene can enter the body through all four routes of exposure: (1) inhalation; (2) absorption; (3) ingestion and (4) injection. Target organs are the eyes, upper respiratory system, skin and central nervous system. Acute exposure effects include irritation of the eyes and mucous membranes, nose and respiratory system, as well as headache, nausea, staggered gait, headache, dermatitis narcosis and coma. The PEL for ethyl benzene is 100 ppm. Xylene: Xylene is a colorless liquid with an aromatic odor. It is generally found as a mixture of three isomers: ortho-, meta-, and para-xylene. Xylene has a relatively low volatility(vapor pressure = 8 mm Hg @ 68F) and will likely be present in soils in both the liquid and vapor form. The flash point of xylene is 81 F classifying it as a flammable liquid. Xylene can enter the body through all four routes of exposure: (1) inhalation; (2) absorption; (3) ingestion and (4) injection. Target organs are the central nervous system, eyes, gastrointestinal tract, blood, liver, kidneys, and skin. Acute exposure effects include i dizziness, excitement, drowsiness, incoordination, abdominal pain, vomiting and irritation of the eyes, nose and throat. The PEL for xylene is 100 ppm. PERSONNEL PROTECTION Personnel working around drilling activity will wear hard hats, work gloves, shirts and pants. All people not directly involved in the site investigation will be asked to leave. The site is a gas station serving the public, however, public will be required to stay away from the actual work. All inflammable materials will be stored in drums and sealed when not in use. Monitoring of the air will not be required at this site. DISPOSAL OF HAZARDOUS MATERIALS Hazardous material which is required by the County Health Department to be containerized will be transported by a licensed hazardous waste transporter to an appropriate facility with a properly filled out chain of custody form.