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MONITORING EQUIPMENT <br /> Monitoring Equipment. Specify by task Indicate type as necessary <br />' Instrument Task Action Guidelines <br /> Combustible Gas 0-10%LEL No explosion hazard <br /> Indicator 10-25%LEL Potential explosion hazard, notify SHSC <br />' >25%LEL Explosion hazard, interrupt task/evacuate <br /> 210%02 Oxygen normal <br /> <21 0%02 Oxygen Deficient, notify SHSC <br /> <19 5%02 Interrupt task/evacuate <br /> Comments (Includes schedules of use) <br />' [ x ] Not Needed <br /> [ ] Is operator aware that 10% of the L E L for most hydrocarbons is likely to be well above the <br /> ' health exposure limit9 For example, LEL for gasoline is 1 3% (13,000 ppm), 10% of LEL is <br /> 1,300 ppm which is 4 times above the TLV of 300 ppm <br /> ' Instrument Task Action Guidelines <br /> Photoionization soil screening Specify If levels exceed 5 times background or 5 ppm in the <br /> Detector breathing zone for a 5 minute period,stop work,retreat from area <br /> for 15 minutes, monitor the breathing zone and return if PID <br /> [ ] 11 7 ev readings return to normal levels If elevated levels persist then <br /> [ ] 10 2 ev don level C PPE <br /> [ ] 98ev <br /> ' [ ] ev <br /> Type <br /> ' Comments (Includes schedules of use) <br /> [ x ] Not Needed <br /> ' Monitoring of breathing zone shall be done on a continuous basis during drilling operations <br /> ' [ ] Check if PID instruction manual will be onsite <br /> Page 10 of 27 <br />