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❑ Assemble work group and discuss zone delineation, present conditions, <br /> levels of protection, responsibilities, access points, decontamination <br /> procedures, and emergency site egress point(s). <br /> 1. <br /> 13Don the specified level of proteIction before entering the site and complete <br /> the entire decontamination process before exiting. <br /> 4 <br /> 6.2 Monitoring Procedures <br /> Air monitoring equipment will be used tolmneasure airborne levels of organic vapors <br /> during sampling activities at the site. Monitoring will be used to confirm that the proper <br /> level of protection is being used. Monitoringl�will be conducted using an organic:vapor <br /> analyzer (OVA) consisting of a photoionization device (PID) or flame ionization device <br /> (FID). Based on the available information on! vapor components potentially present at the <br /> site and the results of the initial OVA readi "gs, the HSO will determine if additional <br /> monitoring equipment is required. <br /> The OVA will be calibrated in accordance; with the manufacturer's instructions before <br /> each day's activities, and a calibration check ,will be conducted on the instrument at the <br /> r` end of each work day. Calibration will be documented in the field log. <br /> At the beginning of each work day, background readings will be obtained at an upwind <br /> location. OVA readings will be measured �in the breathing zone when site work is <br /> initiated. The breathing zone will be monitored at 30- to 60-minute intervals or more <br /> frequently if OVA readings are elevated. The1OVA will be held approximately 36 inches <br /> above the sample area for breathing zone readings. If OVA measurements confirm the <br /> presence of organic vapors at sustained concentrations greater than 10 parts per million , <br /> (ppm) above background, field personnel wearing modified Level D PPE will be instructed <br /> to move to an upwind location. instrument spikes exceeding the action level do not <br /> necessitate an upgrade. If the concentrations diminish below 10 ppm, work may. <br /> 4 continue. <br /> However, if concentrations in the field personnel breathing zone are sustained above 10 <br /> ppm appropriate air-purifying respirators will'be worn. If°field team members are already <br /> in Level C PPE, OVA readings will be used to check that the appropriate level of <br /> {x S:\BFS\ST0CKT0N\HSP001) 10/15/99 6-2 <br /> k <br /> !F <br />