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Site Safety and Health Plan Petroleum Hydrocarbon Contamination Terracon Project#67047008 Page 9 the photoionization detector readings in the breathing zone have fallen and stabilized below 25 ppm. 10.1 Site Action Levels Instrument Level DID Mod Level C Site Evacuation PID < 25 ppm > 25 ppm > 300 ppm The Action Levels indicated above are for air in the breathing zone and NOT applicable to vapor above containerized soil samples. The Action Levels are established to prevent exposure to airborne petroleum hydrocarbon vapors in excess of established exposure limits. Although the Action Levels indicated for Site Evacuation are within the protective capacity of the respirator cartridges specified below, personnel will evacuate to the UPWIND side of the site if the continuous breathing zone vapor concentrations exceed these limits. The SSO will contact the Corporate Safety and Health Manager for discussion and re-evaluation of personal protective equipment and air monitoring requirements if airborne contamination exceeds Site Evacuation Action Levels. In the event that site evacuation is required, a modification of this safety and health plan will be issued with contingencies for combustible gas monitoring and upgrading to Level B personal protective equipment. THIS PLAN IS NOT VALID FOR LEVEL B SITE ACTIVITIES 11.0 PERSONAL PROTECTIVE EQUIPMENT REQUIREMENTS The air monitoring regimen identified above will allow initial project activity to begin in LEVEL D personal protective equipment to include: • Hard Hat • Chemically Protective Safety Boots (Hazmax, other as approved by S&H Mgr.) • Nitrile, Neoprene Rubber or Silver Shield Outer Gloves • Nitrile or Latex Inner Liners • Safety Eye Wear(ANSI Z-87 approved) • Hearing Protection (if within 10 feet of drill rigs, concrete coring or other equipment which impairs normal conversation at< 5 feet.) If petroleum saturated soils and potential splashing conditions develop during the course of the assessment, personnel will upgrade to LEVEL D MODIFIED personal protective equipment. Level D Modified personal protective equipment ensemble consists of the above, plus: • Polylaminated Tyvek Coveralls