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PES Environmental, Inc. • Rubber boots and gloves; and • All other PPE as appropriate for the work area and identified by the Job Safety Analysis and the SSHO. 4.13 Chemical Hazard Mitigation The chemical hazards listed above will be mitigated by a combination of on-site air monitoring, implementation of spill controls, and having on-site personnel wear the appropriate PPE, as needed. The presence of volatile organic compounds (VOCs) in ambient air will be monitored using a portable photo-ionization detector/organic vapor analyzer (PID/OVA). The PID/OVA will be calibrated following instructions provided by the manufacturer. Initial meter readings will be made prior to sampling in order to establish background concentrations. If measured average concentrations of VOCs in ambient air exceed 5 ppm above background concentrations, personnel will be required to utilize respirators with organic filters and wear tyvek suits (Level C), in addition to the PPE required for Level D. PES will control emissions, if any, through the use of portable fans or other engineering controls if it appears that any nuisance emissions are evident. If nuisance emissions cannot be mitigated PES may choose to halt operations. Decontamination procedures for Level D conditions consist of being required to wash their hands with soap and potable water after performing any on-site activities and prior to ingestion of food or liquids. Disposable items (i.e., Tyvek coveralls, respirator cartridges, gloves, etc.) will be changed daily unless there is reason to change sooner. Respirators will be decontaminated daily. The masks will be disassembled, the cartridges replaced, and all other parts placed in a cleaning solution (typically warm soapy water). Prior to re-use of the respirator, employees will inspect their mask to ensure there are no apparent defects, tears, etc. 4.14 Physical Hazard Mitigation The potential mechanical hazards associated with excavation equipment will be avoided by maintaining adequate clearance around operating equipment. While working at the site, the field personnel must be aware of equipment movement, general traffic, and facility operations. Potential traffic hazards will be avoided by maintaining adequate clearance around moving equipment, vehicles, implementing safe speed practices and proper equipment condition. Potential electrical hazards can be avoided by: locating buried utilities in areas where subsurface work is performed, making sure all equipment is properly grounded, keeping equipment a safe distance away from overhead lines, using ground-fault circuit breakers, taking appropriate action in the event a storm approaches (e.g., take shelter in building or vehicle; stay away from drill rig, isolated trees and any water; stay low to ground). 148400101H002.doc 9