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the appropriate PPE requirements can be approved by the Consulting safety <br />professional and implemented by the SSO. If corrective action cannot be <br />taken, field personnel and other individuals in the area must be directed to <br />move to a safe area. The SSO and Project Manager must also be contacted. <br />The consulting health and safety professional shall be responsible for <br />determining whether additional exposure monitoring/ sampling is needed to <br />supplement the equipment and methods described above. The SSO shall <br />monitor that the instruments are operated and interpreted only by persons <br />who have had prior training and experience in their operation, calibration <br />and care, and who understand their limitations. He shall also monitor that the <br />instruments are being properly calibrated, and that the calibration and proper <br />operation of the instruments are checked and documented periodically. <br />The OVA shall be calibrated both before and after field operations or as <br />deemed necessary during field operations. The instruments will be calibrated <br />directly to the type calibration gas used by the equipment manufacturer. The <br />calibration gas and the calibration readings (in ppm equivalent) shall be <br />recorded in the field logbook. <br />It should be noted that the OVA -FID hydrogen flame can extinguish in low <br />oxygen environments. In addition, high humidity environments can cause an <br />OVA -PID instrument to indicate lower organic vapor concentrations than <br />actuall <br />y exist. <br />Though collected by the SSO, the consulting health and safety professional <br />shall be responsible for interpreting monitoring data and upgrading or <br />downgrading the level of protection during field activities. <br />LEVEL <br />MEASURED BY <br />CALIBRATED <br />OVA <br /><10 ppm <br />10 ppm - 24 ppm <br />25 ppm - 99 ppm <br />ACTION......... <br />Continue OVA monitoring at specified <br />frequency and duration <br />Level Measured by Benzene Draeger Action <br />Tube Test <br /><1 ppm <br />>1 ppm <br />Respirators required. <br />100 ppm or 'Stop work personnel move out of area, <br />greater 'contact Project Manager. More stringent ' <br />respiratory protection may be required. <br />COSTERA WASTE &ENVIRONMENTAL, INC. 26 <br />Respirators not required <br />Respirators required <br />MAY 4, 2021 <br />