ARCHIVED REPORTS XR0001833 - Laserfiche WebLink

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1. JOB HAZARD ASSESSMENT Immediate tasks at any leaking UST site include an evaluation of any present or potential threat to public safety Questions need to be answered regarding the dangers of significant vapor exposures and potential explosion hazards Potential Chemical Hazards The chemical components of gasoline that are the most dangerous to site workers are the volatile aromatics, benzene, toluene, ethylbenzene, xylene, and potentially, organic lead (see attached Material Safety Data Sheet) Additionally, solvents such as 1,2-dichlorobenzene and 1,2-dichloroethane may also be used as cleaning solutions at service stations The primary health risks associated with each of these chemicals are described below Gasoline -Suspected human carcinogen A TLV of 300 ppm or 900 mg/m3 has been assigned to gasoline This value of 300 ppm was assigned based on an average of 3 percent benzene (10 ppm TLV) in gasoline Low-level )Inhalation exposure to gasoline can cause irritation to the eyes, nose, and respiratory system, headache, and nausea Benzene -Suspected human carcinogen A TLV of 10 ppm or 30 mg/m3 has been assigned to benzene Benzene has a low odor threshold limit of 1 4 ppm Low-level inhalation exposure to benzene can cause irritation to the eyes, nose, and respiratory system, headache, and nausea Toluene -A TLV OF 100 ppm or 375 mg/m3 has been assigned to toluene Toluene has a low odor threshold limit of 2 1 ppm Low-level inhalation exposure to toluene can cause fatigue, weakness, confusion, and euphoria Ethyllbenzene -A TLV of 100 ppm or 435 mg/m3 has been assigned to ethylbenzene Ethylbenzene has a low odor threshold limit of 2 ppm Low-level inhalation exposure to ethylbenzene can cause irritation to the eyes and mucous membranes Xylene -A TLV or 100 ppm or 435 mg/ m3 has been assigned to xylene No low odor threshold limit has been established for xylene Low-level inhalation exposure to xylene can cause dizziness, excitement, and drowsiness 1,2-Dichlorobenzene -A TL V of 50 ppm or 306 mg/m3 has been assigned to 1,2-dichlorobenzene 1 ,2-dichlorobenzene has a low odor threshold limit of 4 0 ppm Acute vapor exposure can cause coughing, dizziness, and drowsiness It may cause skin irritation 1 2-Dichloroethane -A TLV of 200 ppm. No data is available concerning odor threshold Acute vapor exposure can cause coughing, dizziness, drowsiness, and skin irritation Tetraethyl Lead -A TL V of 0 1 mg/m' has been assigned to tetraethyl lead Tetraethyl lead is a colorless or red-dyed liquid at atmospheric conditions No data is available concerning odor threshold Acute vapor exposure can cause insomnia, delirium, coma, and skin irritation Main\D\EnvironmentaMarmarTexaco\Workplan\042003 wpd 2