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Site Health & Safety Plan AGE-NC Project No. 11-1957 Page 2of6 3.0. ON-SITE CONTROL The Site Safety Officer will coordinate site access control and security. An exclusion zone will be established approximately 10 feet around excavation. No unauthorized person shall be allowed within this exclusion area. 4.0. HAZARD EVALUATION The following substance(s) or hazards are known at the following concentrations: SUBSTANCES INVOLVED: I CONCENTRATIONS: VOCs I unknown The primary hazards of each are identified as follows: 1. Hydrocarbon fuels - Components of fuels are colorless liquids with strong aromatic petroleum hydrocarbon-like odors. They are flammable and have low solubility in water. Exposure to these materials in excess of recommended exposure limits can cause mild eye, nose, and throat irritation and can produce a narcotic effect on the central nervous system. Symptoms of exposure at these concentrations include headache, nausea, drowsiness, dizziness, and loss of coordination. Certain components of gasoline (BTE&X etc.) are known or suspected carcinogens. 2. Perchloroethylene (PCE) - Colorless liquid used for dry cleaning fabrics. PCE is known to have a sweet odor detectable at a concentration of 1 part per million (ppm). PCE is classified by the International Agency for Research on Cancer as a Group 2A Carcinogen, meaning that it is probably carcinogenic to humans. PCE is a central nervous system depressant and can enter the body through respiratory or dermal exposure. Exposure to Concentrations of 200 ppm or more have been associated with dizziness, confusion, headache, nausea, and irritation of the eyes and mucous tissue. Exposure to extremely high levels of PCE may lead to unconsciousness and, in extreme cases,death from respiratory depression. Nausea and vomiting may follow from inhalation of large amounts of PCE. Symptoms of exposure to skin can include redness, itching, blistering, and pain. Prolonged exposure can result in the removal of natural protective oils from skin resulting in irritation, dryness, cracking and dermatitis. Likewise, extended dermal contact can result in second- and third-degree chemical burns. Contact of PCE vapors above 75 ppm with the eyes will result in irritation, redness, and pain. Advanced GeoEnvironmental,Inc.