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• • Project No. 014-95262 <br /> Page No. 7 <br /> 3.0 SAFE WORK PRACTICES AND LEVEL OF PERSONAL PROTECTION <br /> The following sections present procedures on how to adequately address the primary potential <br /> hazards encountered in the different task of this project. The standard level of personal protection is also <br /> defined. <br /> Based on the work to be performed the type of chemical hazards that may be encountered, EPA <br /> Level D personal protection has been determined to be adequately protective and suitable for most of the <br /> tasks in this project. Certain tasks may require a higher level of protection, such as air-purifying or <br /> air-supplied respirators. These determinations will be made by the Safety Officer or Safety Task Leader <br /> and will be specified as amendments to this section of the plan. <br /> 3.1 Potential Fire/Explosion Hazard <br /> Due to the flammable nature of the hydrocarbons and volatile organic carbons, explosive vapor <br /> conditions will be carefully monitored by the Krazan & Associates task leader. Lower explosive limit <br /> (LEL) measurements will be taken using the PID and documented. The LEL for gasoline hydrocarbons <br /> is approximately 1.4% in air. Using a 10-fold safety factor, a working criteria of 1400 ppm (10% LEL) <br /> as measured by a PID is established for explosion hazards. When measurements obtained near the bore <br /> hole reveal this concentration, or above, work will be stopped. Additionally, the field crew will be <br /> instructed to stay upwind until these concentrations diminish. <br /> 1 3.2 Potential Health Hazards <br /> Depending on the conditions encountered, the Task Leader in coordination with the Project Safety <br /> Officer may increase or decrease the level of personal protection required of all field team members. Such <br /> decisions will be made based on initial and periodic measurement of breathing zone concentrations of <br /> petroleum constituents by PID and on other data collected as work is conducted on a given site. <br /> Generally speaking, EPA Level D Personal Protection will be in accordance with the following <br /> guidelines: <br /> • Krazan & Associates technician uniform <br /> • Hard hat <br /> • Safety glasses <br /> • Ear plugs (as required) <br /> • Steel-toe boots. <br /> ' KRAZAN&ASSOCIATES, INC. <br /> Offices Serving the Western United States <br /> 95262.HSP <br />