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r <br /> TABLE 1 <br /> ACTION LEVELS AND ACTION TO BE TAKEN <br /> Device Reading Location Time Period Action <br /> FID/PID <5 ppm Borehole ---- Continue hourly monitoring <br /> FID/PID >5 ppm Borehole s 1 minute Increase monitoring frequency <br /> FID/PID <1 ppm Breathing Zone ---- Continue hourly monitoring <br /> Increase monitoring frequency. <br /> FID/PID >1 ppm Breathing Zone >_ 1 minute Suppress vapors with water <br /> spray at source. Upgrade to <br /> Level C PPE. <br /> Stop work; move upwind while <br /> FID/PID >5 ppm Breathing Zone z 5 minutes vapors dissipate. If elevated <br /> levels remain, cover areas and <br /> spoils, and notify Site Manager <br /> <0.5 mg/m' Work Area Perimeter -- Continue monitoring every hour <br /> Apply dust control at the source. <br /> Mini-Ram >0.5 mg/ma Work Area Perimeter >_ 1 minute Increase monitoring frequency <br /> to 30 minute intervals <br /> 10.0 Work Area Perimeter z 1 minute Stop work. Evacuate upwind and <br /> notify Site Manager <br /> <2.5 mg/ma\a\ Breathing Zone >_1 minute Continue dust monitoring <br /> Mini-Ram <br /> >2.5 mg/ma Breathing Zone z1 minute Upgrade to level C PPE. Apply <br /> dust control at the source. <br /> Sound Level <br /> Monitor >85 dBA Anywhere Instantaneous Don hearing protection <br /> (a) Based on Cal-OSHA 112 respirable particulate permissible exposure limit(PEL) <br /> ENV.., February 2005 <br /> A M f R l C A P:\PG&E\PGE-05-01 Stockton MW26R Investigation\MW26 Work Plan\H&S\H&S Plan-2005.doc <br />