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RECEIVED DEC 05 2017 UNDERGROUND UTILITIES 1.:INVIIRONINIENTAI, DEPARTNIENT The utility mark out company, Underground Service Alert North, will be contacted by EBI and/or the drilling subcontractor. In addition, a GPR survey for private utility lines is being conducted prior to the borings. On-site personnel will be responsible for locating and marking any facility underground utilities or structures not located by the utility locator. Upon encountering any unmarked lines during the field activities, work will be stopped immediately until the hazard associated with the line can be evaluated. HAZARD OVERVIEW The contractor shall be responsible for safe work practices in compliance with all Occupational Safety and Health Administration (OSHA) standards and the site safety plan must be used at all times. CHEMICAL HAZARDS Petroleum Hydrocarbons Health effects from exposure to petroleum hydrocarbons depend on many factors. These include the types of chemical compounds in the petroleum hydrocarbons, the duration of exposure, the type of exposure (inhalation vs. dermal) and the amount of the chemicals absorbed into the skin. The compounds in different petroleum hydrocarbons fractions affect the body in different ways. Some of the petroleum hydrocarbons compounds, particularly the smaller compounds such as benzene, toluene, and xylene (which are present in gasoline), can affect the human central nervous and hematopoietic (blood) systems (benzene). If exposures are high enough, death can occur. Breathing toluene at concentrations greater than 100 parts per million (100 ppm) for more than several hours can cause fatigue, headache, nausea, and drowsiness. When exposure is stopped, the symptoms will go away. However, if someone is exposed for a long time, permanent damage to the central nervous system can occur. One petroleum hydrocarbons compound (n-hexane) can affect the central nervous system in a different way, causing a nerve disorder called "peripheral neuropathy" characterized by numbness in the feet and legs and, in severe cases, paralysis. This has occurred in workers exposed to 500-2,500 ppm of n-hexane in the air. Swallowing some petroleum products such as gasoline and kerosene causes irritation of the throat and stomach, central nervous system depression, difficulty breathing, and pneumonia from breathing liquid into the lungs. The compounds in some petroleum hydrocarbons fractions can also affect the blood, immune system, liver, spleen, kidneys, developing fetus, and lungs. Certain petroleum hydrocarbons compounds can be irritating to the skin and eyes. Benzene is a known human carcinogen, causing a rare form of blood cancer. Neurological symptoms of inhalation exposure to benzene include drowsiness, dizziness, headaches, and unconsciousness in humans. Ingestion of large amounts of benzene may result in vomiting, dizziness, and convulsions in humans. Exposure via dermal contact and inhalation exposure should be avoided. Exposure to liquid and vapor may irritate the skin, eyes, and upper respiratory tract in humans. Redness and blisters may result from dermal exposure to benzene. Volatile Organic Compounds (VOCs) Volatile organic compounds (VOCs) are emitted as gases from certain solids or liquids. VOCs include a variety of chemicals, some of which may have short- and long-term adverse health