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• r Project No. 034-17016 Site-Specific Health& Safety Plan Page No. 16 Based on the work to be conducted and the type of chemical hazards that may be encountered,EPA Level D personal protection has been determined to be adequately protective and suitable for most of the tasks in this project. Certain tasks may require a higher level of protection, such as air-purifying or air-supplied respirators. These determinations will be made by the Safety Officer or Safety Task Leader and will be specified as amendments to this section of the plan. 3.1 Potential Fire/Explosion Hazard Due to the flammable nature of the hydrocarbons,explosive vapor conditions will be carefully monitored by the Krazan Task Leader. Lower explosive limit (LEL) measurements will be taken using the PID and documented. The LEL for gasoline hydrocarbons is approximately 1.4%in air. Using a 10-fold safety factor, a working criteria of 1,400 ppm(10%LEL)as measured by a PID is established for explosion hazards. When measurements obtained near the bore hole reveal this concentration, or above, work will be stopped. Additionally,the field crew will be instructed to stay upwind until these concentrations diminish. 3.2 Potential Health Hazards Depending on the conditions encountered,the Task Leader in coordination with the Project Safety Officer may increase or decrease the level of personal protection required of all field team members. Such decisions will be made based on initial and periodic measurement of breathing zone concentrations of petroleum constituents by PID and on other data collected as work is conducted on a given site. Generally speaking, EPA Level D Personal Protection will be in accordance with the following guidelines: • Krazan technician uniform. • Hard hat. • Safety glasses. • Earplugs(as required). • Steel-toed boots. 3.3 Potential Heat Stress Hazards During conditions when the temperature,humidity,and/or radiant heat are high and air movement is low,the following procedures will be followed to prevent heat stress hazards for workers wearing protective clothing/equipment: • Work activity will be limited to reduce the amount of heat naturally produced by the body. Alternating work and rest periods will be used in high potential conditions. For example, in moderately hot conditions,5-minute rest breaks in the shade with 60-minute work periods in the sun may be desirable.Under severe conditions,the duration of rest periods will be increased as necessary. • Heavy work will be conducted during the cooler periods of the day when feasible. • Under heat stress conditions,special attention will be given toward assuring that workers replace lost body fluids. Adequate supplies of cool drinking water or electrolyte solution will be provided by KRAZAN&ASSOCIATES,INC. With Offices Serving the Western United States 03417016 SSI Ladvop HASP Final.do