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CHOW ENGINEERING, INC. Rev. 6, 8-8-14 Health and Safety Officer (SHSO). It is the responsibility of the SHSO to correct unsafe practices or conditions immediately. It is the responsibility of CE to ensure that all employees understand and adhere to the procedures of this plan and follow the instructions of the Crew Foreman/SHSO. It is also the responsibility of any employee to bring to management's attention any unsafe or hazardous conditions or practices that may cause injury to either themselves or any other personnel on site or associated with the work. Any changes to this Site Health and Safety Plan must be approved by Mr. Chow or his designee. This plan shall be reviewed by a qualified person as the job progresses to determine if additional practices, procedures or training need to be implemented. Workers shall be notified and trained, if necessary, in the new procedures. A copy of this plan and all approved changes shall be maintained at the jobsite. 4.0 Site Hazards 4.1 Chemical Health Hazards According to information provided to CE by General Dynamics, the primary expected hazard on site is petroleum hydrocarbons (mineral oil) in the soil. Field work will be accomplished in Level "D". This material has also been identified in the groundwater from well sampling and analyses. The chemical hazards on site are very low with the only condition of personal exposure occurring when the well is opened and contact with the groundwater during purging, sampling and handling activities. There are no known volatile or semi-volatile organic compounds in the groundwater and very low concentrations of non-combustible, non-flammable, and non-toxic hydrocarbon related to mineral oil fractions in the groundwater. Consequently, the chemical hazards present and the potential risks or impact to site personnel or workers, to the community and the environment is very low. During monthly application of 2% hydrogen peroxide solution (98% water), there is low exposure to the H202 solution which is minimized with appropriate personal protective equipment and controls such as funnels and tubing to minimize splashing potential during the application. In addition, the physical hazards, including access to and handling procedures at the wells are low and no more than accessing a remote site in an unpopulated, relatively undeveloped area with few occupants nearby. Handling procedures of the wells and groundwater sampling equipment is done using appropriate Level D personal protective equipment (PPE) including gloves, safety glasses, and work shoes. 3