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WN <br /> Al Gases arm Yom. <br /> Potentially explosive concentrations of gases and vapors <br /> will be monitored at least once every 15 minutes during <br /> sampling activities using a combustible gas meter . it at <br /> any time the concentration exceeds 20% of the lower <br /> explosive 11mit (LEL) , activities will stop and the area <br /> will be evacuated until gas levels have roeensreduced <br /> ato less <br /> h <br /> than 20% of the LEL and the source of 9 <br /> or <br /> vapors has been determined . 1° <br /> • <br /> F� <br /> B) Tatar QLS=Ja yla <br /> v A direct reading photoionization detection. (PID) meter (HNU <br /> PI 101 or equivalent) wil.l be used to monitor the <br /> concentrations of organic vapors in the work m!1Utarea <br /> t� . <br /> measurements will be taken at least once every 1 <br /> during surface and subsurface sample collection. 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 /> in 250 ppm will <br /> Breathing <br /> zone <br /> on-site cuntil tthe sworkeXcess tOP zone oconcentrations saxe <br /> the <br /> f reduced to below 250 ppm. <br /> EMPLOYEE TRAINING AND INFORMATION <br /> iiaterWork will conduct training for all <br /> Prior to site activity, <br /> previous documented hazardous waste <br /> site personnel without a <br /> training course. The training will have the fallowing <br /> objectives: <br /> 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 /> M <br />