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JOB HAZARD ANALYSIS AND HAZARD CONTROL METHODS Potential Health Hazards of Lead A potential health hazard associated with this project is blast sediment contaminated with lead compounds. These compounds under certain conditions can affect the body if inhaled, or if they come into direct prolonged contact with eyes or skin. Although these compounds are not directly absorbed through the skin, allergic type dermatitis has reported. These compounds have also been reported in medical literature as leading to kidney damage where absorption through damaged skin has occurred. Permissible and Recommended Exposure Limits The airborne concentrations are usually expressed in parts of airborne gas or vapor per million parts of air by volume (ppm) and parts per billion (ppb) parts of air or in milligrams per cubic meter of air (mg/m3). Gases and vapors can be quantified in ppm, ppb or mg/m3, while aerosols, airborne solid or liquid particle (dusts, mists and fumes) are usually only measured in mg/m3. American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) Lead: ACGIH has adopted a TLV-TWA of 0.05mg/m3. California Occupational Safety and Health Administration (CAL/OSHA) Permissible Exposure Limits (PELs) Lead: The Cal/OSHA established a PEL-TWA of 0.05 mg/m3 Exposure Control Methods The risk of exposure to Lead contaminated aerosols will be controlled with wet methods. Water spray will be applied to areas of dry soil exposed to the wind. Movement of equipment, machinery, and personnel will be restricted to defined areas. Water will be applied to all areas affected by sandblasting residue before and during the removal process. Potential Physical Hazards Heat Stress Due to the geographical location of the site, and the use of protective clothing, heat stress is a physical hazard that will be considered throughout the duration of the site work. Therefore, to the extent feasible, all work performed at the site