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SECTIONFOUR Site Nazard Anainis <br /> TABLE 4-1 <br /> Chemical Contaminants of Concern <br /> Methane 1000 <br /> Sources:NIOSH 2005;8 CCR 5155 et seq, , , , , and <br /> CNS = central nervous system OSHA = Occupational Safety and Health Administration <br /> GI = gastro-intestinal PEL = permissible exposure limit <br /> mg/kg = milligrams per kilogram ppm =parts per million <br /> Mg/M3 = milligrams per cubic meter TLV =threshold limit value <br /> ND = not detected gg/L =micrograms per Liter <br /> TABLE 4-2 <br /> Monitoring Equipment Action Levels Project Field Activities <br /> Egttprrtrtt` s , �ead� s Attccat <br /> Explosimeter <10%LEL Continue with caution. <br /> >10%LEL Halt operations and evacuate. Reassess situation.Attempt to <br /> determine what and why conditions are changing. <br /> at c� er ,�aa Rias�estetto � <br /> ` 1 etertl7 r e whatat ft,,a re Oh t�tttg <br /> �` 9 x-23 1 �ntr it #�z� <br /> aper ht is atld eve r.7 e k eas s,mil tt "Aft t t , <br /> rrrthatgtrtg <br /> the with attd ns are <br /> CO < 15 ppm Periodic monitoring not less than every 30 minutes <br /> Meter/Explosimeter <br /> > 15 ppm and<25 Reduce sources of vehicle/engine exhaust and increase ventilation. <br /> ppm Increase monitoring to not less than every 15-minutes. <br /> >25 ppm Shut down sources of vehicle/engine exhaust and evacuate <br /> immediate area. Contact HSM <br /> H2S Meter < 10 ppm Periodic monitoring not less than every 5-minutes <br /> > 10 ppm and<20 Increase to continuous monitoring. <br /> ppm <br /> >20 ppm Evacuate area immediately. Contact HSM <br /> Readings are above background levels and taken in the breathing zone of field personnel.Monitoring to be conducted twice <br /> during each work shift,or as deemed necessary by the SSO or PM.For benzene confirmed contaminants or if benzene cannot <br /> be ruled out(at the TLV action level full-day confirmed exposure)work resulting in exposure must stop and the PHSO or HSM <br /> must be consulted,(additional controls and equipment requirements may be implemented). <br /> Intermittent=<two minutes <br /> Continuous=>two minutes <br /> d <br /> TS AND SETTINGS\CLEIMBECH\DESKTOP\WORLD ENTERPRISES\WORK PLANS\WELL DESTRUCTIONWTTACHMENT C WORLD ENTERPRISES HSP TG EDITS.DOC\16- <br />