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,:.- ass .s a.. -..- ' • '.q '.. 5 '. • y. ... =.., ,. <br /> A C }N �a2..'1.yI r.+.w•i .�� �:/.�ri 4 Y"_ <br /> Potentially explosive• concentrations of gases and vapors <br /> will be monitored at least once every 15 minutes during <br /> za mpling activttles u::inij a combustible gas meter . If at <br /> any time the concencration exceeds 20% of the lower <br /> explosimn limit (LEL) , activities will stop and the area <br /> will be evacuated until gas !,vela have been reduced to less <br /> than 20% of the LEL and the :source of combustible gases or <br /> vapors has been determined . <br /> R) Total CQrggnic vapors <br /> A direct reading photoionization detection (PID) meter (HNU <br /> Pf 101 or equivalent) will be used to monitor the <br /> concentrations of organic vapors In the work area. <br /> Measurements will be taken at least once. every 14 minute;5 <br /> during surface and subsurface samplecollection. The meter <br /> will be calibrated for benzene. Total organic vapor <br /> measurements will be used to determine the appropriate <br /> levels of respiratory protection and conditions for site <br /> evacuation. 'Total organic vapor concentrations in the <br /> workers breathing zone in excess of 10 ppm above background <br /> will trigger an upgrade from level D to level C protection. <br /> Breathing zone concentrations in excess of 250 ppm will stop <br /> the work on-site until the work zone concentrations are <br /> reduced to below 250 ppm. <br /> EMPLOYEE TRAINING AND INFORMATION <br /> a Prior to site activity, WaterWorl; will conduct training for all <br /> site personnel without a previous documented hazardous waste <br /> training course. The training will have the following <br /> objectives: <br /> L o Ensure that workers are aware of potential hazards <br /> they may encounter. <br /> �. o Provide the knowledge and skills necessary to <br /> perform the work with minimal risk to workers <br /> health and safety. <br /> o Familiarization with the Site Safety plan and <br /> site-specific requirements. <br /> v <br />