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ACTION LEVELS <br /> Action levels and response criteria for hydrocarbon exposures are presented below. Mercury monitoring <br /> will not be conducted due to its low vapor pressure and the minimal exposure pathways present. Initial <br /> monitoring is conducted on a regular basis (every 10 minutes) in the work area. All readings are to be <br /> recorded in the field log book. <br /> Analyzer Reading* Location Duration Action Personal Protective Equipment <br /> < 15 ppm Point of Continue periodic monitoring. Minimum Site Ensemble <br /> Operations/ <br /> Release <br /> Source point <br /> > 15 ppm Point of >I minute Monitor OBZ; don protective Minimum Site Ensemble, <br /> Operations/ clothing; establish work zones PLUS: <br /> Release Tyvek coveralls$, <br /> Source point Nitrile Outer Gloves, and <br /> Nitrile Inner(surgical) Gloves <br /> < 15 ppm OBZ ----- No respirators required. Same as above <br /> > 15 ppm OBZ >1 minute Provide respiratory protection; Add Half-face <br /> establish decon area respirators with organic vapor <br /> cartridges <br /> > 75 ppm OBZ >1 minute Increase respiratory Replace 1/2-Face respirators <br /> protection. with Full-face respirators with <br /> organic vapor cartridges. <br /> > 150 ppm OBZ >I minute Stop work; move upwind As specified by RHSC <br /> while vapors dissipate. If <br /> OR instanta- elevated levels remain, cover <br /> nexus boring and cuttings, evacuate <br /> > 300 ppm OBZ upwind and notify RHSC or <br /> PM. <br /> (OBZ- Operator's Breathing Zone) <br /> SITE CONTROL <br /> Work area barricades will be used to prevent access by unauthorized persons. Yellow caution tape and/or <br /> sawhorse-type barricades can be used for this purpose. Formal work zones will be implemented if the <br /> analyzer reading exceeds 15 ppm in the work area. <br /> GALLI.140 <br />