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0 0 <br />' SITE SECURITY <br />' Access during all on-site activities will be restricted to authorized personnel. All personnel and authorized <br />visitors must contact the Site Safety Officer/Project Manager prior to entering and exiting the exclusion <br />' zone. <br />' RECORD KEEPING <br />All site safety records pertaining to this site investigation, including records of daily tailboard safety <br />' meetings, will be maintained by the Site Safety Officer/Project Manager throughout the project. <br />AIR MONITORING <br />tThe Site Safety Officer/Project Manager (or another qualified person designated by the Site Safety Officer) <br />will conduct periodic air monitoring, using direct -reading, real-time sampling equipment. This will include <br />' using a direct -reading photoionization detection meter (Photovac Microtip 1000 or equivalent) to monitor <br />the concentrations of organic vapors in the work area. Organic vapors will be monitored periodically during <br />' the collection of soil samples. The meter will be calibrated at the start of each work period with isobutylene <br />gas. Total organic vapor measurements will be used to determine the appropriate levels of respiratory <br />' protection, and identify conditions that would require site evacuation. Total organic concentrations in the <br />worker's breathing zone in excess of 20 PPM will require Level C personal protective equipment. Total <br />' organic concentrations in the worker's breathing zone in excess of 100 PPM will require evacuation of the <br />work area until the organic concentrations subside to below 100 PPM. <br />t <br />I <br />1 <br />1 <br />402_331-98_63 B-5 <br />