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All sampling and analysis will be conducted via the NIOSH Manual of <br /> Analytical Methods, or equivalent. After the initial survey, the personal <br /> exposures will be determined and upgrading or downgrading of the level <br /> of personal protection may be initiated by the HSO after consultation with <br /> the DIHS. <br /> General Area Monitoring <br /> Subsequent air monitoring will always be conducted regardless of the <br /> degree of visual and/or odor observances. The intent is to utilize generic <br /> field instruments and action levels to assess the continuous exposure to <br /> field personnel during the investigation and upgrade or downgrade PPE <br /> in response to the monitoring. The general monitoring shall consist of <br /> daily breathing zone monitoring every 30 minutes using the PID or FID. <br /> Daily calibration and maintenance of the PID or FID will also be recorded <br /> and performed according to the manufacturer's recommendations (see <br /> Appendix for calibration documentation sheet). All breathing zone <br /> readings will be recorded in the field log book. <br /> Action Levels <br /> The health and safety officer will establish daily background total organic <br /> vapor (TOV) and dust levels prior to initiating site activities. Under most <br /> circumstances, this level can be determined by taking multiple readings at <br /> representative locations along the perimeter of the site and averaging the <br /> results of sustained measurements. <br /> Decisions to upgrade personal protection will be based on sustained <br /> breathing zone TOV or dust levels. Breathing zone refers to the area from <br /> the top of the shoulders to the top of the head. The Action Levels for this <br /> project have been established to provide a very conservative level of <br /> protection for site personnel. Use of the established site-specific Action <br /> Levels will afford site personnel respiratory protection well in excess of <br /> published exposure limits. Decisions to upgrade levels of respiratory <br /> protection are based on previous experience and knowledge of similar <br /> contamination levels of soils of this type. Specific criteria for upgrading <br /> personal protection based on TOV and dust is presented in the following <br /> table. <br /> 5-2 <br />