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site. The HSC is available to assist the PM or the FSO in determining the <br /> appropriate instrumentation. <br /> Direct-reading instrumentation will be calibrated per manufacturer's <br /> instructions. Cylinders of the appropriate calibration gas will be required <br /> for field work lasting longer than 1 day. <br /> Under stable site conditions,ambient air monitoring will be conducted at <br /> least once every 2 hours in the workers' breathing zone and at other <br /> locations based on the professional judgment of the FSO or the Division <br /> H&S Advisor. Ambient air monitoring results will be recorded on the <br /> Ambient Air Monitoring Form found in Appendix I. If site conditions <br /> become unstable or change dramatically, or if there is a question <br /> regarding the adequacy of engineering controls and PPE used, ambient air <br /> monitoring will be conducted more frequently based on the professional <br /> judgment of the FSO or the Division H&S Advisor. <br /> Table 5-1 outlines the steps to be taken by the FSO when the action levels <br /> of the dust are exceeded. Respiratory protection is selected based on <br /> occupational exposure limits of the constituents at the site and the <br /> potential for exposure to dust from site activities. <br /> TABLE 5-1: Action Levels and Response Actions Requirements <br /> Chemical Action Level Response Actions <br /> Dust Greater than • Stop work and leave the immediate area. <br /> 0.5 milligrams per • FSO evaluates need for Tyvek coveralls,dons half-face <br /> cubic meter respirator with high efficiency particulate air(HEPA)filter <br /> (mg/m3) cartridges and monitors again after allowing dust to dissipate. <br /> sustained in the • If readings are less than 0.5 mg/m3,resume work. <br /> breathing zone for • If readings are 0.5 mg/m3 or greater,resume work wearing <br /> 1 minute half-face respirator with P100 cartridge and Tyvek coveralls,if <br /> required. <br /> • Notify PM and PIC of changed conditions. <br /> Greater than • Stop work and leave the immediate area. <br /> 2.0 mg/m3 • Contact PM and Project HSC. <br /> sustained in the • Evaluate work practices and assess engineering controls to <br /> breathing zone for reduce airborne concentrations. <br /> 1 minute. • Implement dust suppression. <br /> • FSO waits 15 minutes,evaluates need for Tyvek coveralls, <br /> dons half-face respirator with P100 cartridges,and approaches <br /> work area slowly. If readings reach 2.0 mg/m3,back out and <br /> wait an additional 15 minutes before repeating monitoring. <br /> ERM 5-4 DEERE/129740-9/29/2011 <br />