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� Safety Officer may also decide to perform perimeter monitoring of downwind air quality conditions during significant surface disturbances B ACTION LEVELS If it is determined based on photo-ionization detector (PID) readings that total hydrocarbon levels in the work area reach 10 ppm in the breathing zone for 5 minutes, half mask respirators with organic vapor cartridges will be required If PID readings indicate total hydrocarbon levels reach 25 ppm in the breathing zone for 5 minutes, work activities will be suspended until the airborne hydrocarbon concentrations decrease to less than 10 ppm If airborne levels remain at 25 ppm or more, all work will cease until all personnel working in the exclusion zone are equipped with full face or if necessary supplied air respi- ratory protection including pressure demand air supplied respirators or self contained breathing apparatus (SCBA) 6.0 PERSONAL PROTECTIVE EQUIPMENT A INTRODUCTION It is important that personal protective equipment and safety requirements be appropriate to protect against the potential hazards at the site Protective equipment will be selected based on the contaminant type(s), concentration(s), and route of entry In situations where the type of materials and possibilities of contact are unknown or the hazards are not clearly identifiable, a more subjective determination must be made of the personal protective equipment A minimum of modified Level D safety equipment and clothing will be required for all workers and visitors on the site All personnel must be prepared to step up to higher levels of protective equipment as conditions warrant B LEVELS OF PROTECTION The basic required work umform for the site is modified Level D protection which will include o hardhat o steel toed boots o safety glasses 3201591A/SSP DOC 6 November 9, 1995