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6.3 Vapor Monitoring <br /> During the excavation of hydraulic oil impacted soil, there may be organic vapors encountered. <br /> The SSHO will be responsible for monitoring the air for organic vapors with an organic vapor <br /> analyzer (OVA). All measurements will be taken in the "breathing zone" of the individual. If <br /> vapor levels are above 50 parts per million (ppm), work will be halted and personnel will move <br /> upwind from the source of the vapors. Personnel will upgrade from Level D to Level C and then <br /> work can proceed. The SSHO will determine when the vapor level is safe for personnel to return <br /> to Level D PPE. <br /> 6.4 Action Levels <br /> Work area action levels are based on real-time monitoring results. Monitoring for cold, noise, <br /> and organic vapors will be maintained during site activities. Monitoring results will dictate the <br /> appropriate actions. Specific action levels based on air monitoring results are presented in Table <br /> 6-1. <br /> Table 6-1 <br /> Air Monitoring Action Levels <br /> Monitoring <br /> Concern Activity Device Frequency Action Level Action <br /> Noise Heavy equipment Sound Level As deemed >85 dBA Don hearing protection <br /> operation Meter necessary by <br /> SSHO <br /> Organic Excavation/ Organic 30 to 60 Background to Level D PPE <br /> Vapors soil sampling/ Vapor minutes 50 ppm <br /> water sampling Analyzer <br /> Organic Excavation/ Organic 30 to 60 >50 ppm Move upwind of vapor <br /> Vapors soil sampling/ Vapor minutes source,until personnel are <br /> water sampling Analyzer in clean air. Upgrade to <br /> Level C with full-face <br /> APR <br /> Dust Excavation/ Miniram 30 to 60 <5 mg/m3 Level D PPE <br /> soil sampling/ minutes <br /> water sampling <br /> Dust Excavation/ Miniram 30 to 60 >5 mg/m3 Upgrade to Level C with <br /> soil sampling/ minutes full-face APR <br /> water sampling <br /> Rough&Ready Island 20 Tetra Tech,Inc. <br /> Revised Draft HSP November 18, 1998 <br />