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0 0 <br />probably originate from airborne dusts, during the drilling of the soil borings <br />and the excavations, and those dusts containing low level concentrations of <br />VOCs in the soils. <br />AAT will have equipment on-site to provide for dust control during <br />drilling and excavation activities if It appears that dust control is warranted. <br />Perimeter air monitoring to detect potentially migrating contaminants may be <br />conducted to ensure no hazardous materials are migrating to the surrounding <br />community. <br />5.0 EXPOSURE MONITORING PLAN <br />A. General: An air quality monitoring program will be Implemented to <br />provide baseline and on-going air quality data for site operations. This <br />program will include: <br />1. A preliminary survey of existing air quality conditions, prior to any <br />surface disturbances. If possible this survey will be under anticipated "worst <br />case" weather conditions. The survey will be used to establish baseline levels <br />for input into the respiratory protection selection process. <br />2. An on-going evaluation of on-site atmospheric contaminant <br />concentrations during site activities that Involve significant surface <br />disturbances. <br />3. Perimeter monitoring of downwind air quality conditions during <br />significant surface disturbances. <br />B. Project Monitoring <br />During the drilling and excavation phases of projects, AAT personnel <br />will be responsible to monitor for the presence of contaminants with a direct <br />reading instrument or it's equivalent. <br />Action levels to upgrade to level B respiratory protection will be at <br /><19.5% oxygen, or Benzene at 10 ppm or greater. <br />6.0 PERSONAL PROTECTIVE EQUIPMENT <br />A. Personal prolective equipment and safety requirements must be <br />appropriate to protect against the potential hazards at the site. Protective <br />equipment will be selected based on the contaminant type(s), concentrations <br />(s), and routes of entry. Field personnel and visitors are required to wear the <br />following clothing and equipment, as a minimum while on the site: <br />Hard flat <br />Safety Glasses <br />Long Sleeved Shirts <br />B. Levels of Protection <br />