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3.0 AIR MONITORING AND CONFINED SPACE ENTRY <br /> 3.1 Air Monitoring <br /> Air monftodng must be performed on all sites in accordance with Groundwater Technology - <br /> practices. Organic vapor concentrations are monitored in the field with a flame ionization detector <br /> (FID) or photoionization detector (PID). All readings are taken in the workers' breathing zone to <br /> determine whether an action level has been met and/or exceeded. Air monitoring results must be <br /> documented on the Vapor Monitoring Form (Appendix B-3). <br /> Air monitoring action levels (Table 3-1) have been developed by Groundwater Technology to indicate <br /> the chemical concentrations in the breathing zone that require an upgrade in level of personal <br /> protective equipment (PPE). The action levels apply to all tasks performed on this site. Guidelines <br /> for frequency of air monitoring are presented In Table 3-2. <br /> -.-.,AIR MONITORING ACTIOII I..EYEL.S. " <br /> .Instrument* <br /> Function. _Measurement- .Action . <br /> Pttamionsa6on Detector(PSD) .:;... <br /> Hone kw action DetealnrD <br /> (F1 } ;,.6Aeas�xs�a iota!orgerwc wap�ora . <br /> 0-75 ppm Level D required <br /> 75-750 ppm Upprade to Level C <br /> >750 ppm Stop work. Contact PM and HSR for guidance. <br /> 0Kygen/CombLftnteter( /La) J&mmam anygan ie.,W ?and laver e3(;1i0sive tintit <br /> 0,2 18.S22% E Acoeptable conditions. Continue normal activity. <br /> Oz <19.5% = Ventilate the space. <br /> ■ Notity PM or HSR if unable to achieve acceptable <br /> conditions. <br /> Oz >22% . La ave cava inrnedmM9 y,this atmosphere is <br /> exvemely tiammabie. <br /> e Notify PM or HSR <br /> LEL <1D% . Acceptable conditions. Continue normal activity. <br /> LEL >10% . Leave area imrnediatety. <br /> ■ Contact PM or HSR for guidance on venting and <br /> other safety measures. <br /> Note: Yratrurnertts must be calibrated aceordimg to manutactureri <br /> LJLJU GROUNDWATER <br /> TECHNOLOGY <br /> 6 <br />