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® Air Monitoring <br />HThere are no atmospheric chemical, radiological, or particulate hazards on this project requiring air monitoring. <br />Air monitoring is the responsibility of the client or subcontractor. <br />Constituents of Interest: Methane <br />Time Weighted Averages (TWAs) are ACG IH 8 -Hr Threshold Limit Values (TLVs) unless noted. <br />Methane; <br />TWA <br />NA See Notes <br />LEL/UEL (%): <br />5.0/15 <br />STEL <br />NA <br />VD (Air= 1): <br />0.6 <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />;None <br />TWA <br />NA <br />LEL/UEL (%): <br />NA <br />STEL <br />NA <br />VD (Air = 1): <br />NA <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />None , <br />TWA <br />NA <br />LEL/UEL (%): <br />NA <br />STEL <br />NA <br />VD (Air = 1): <br />NA <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />None <br />TWA <br />NA <br />LEL/UEL (%): <br />NA <br />STEL <br />NA <br />VD (Air = 1): <br />NA <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />None <br />TWA <br />NA <br />LEL/UEL (%): <br />NA <br />STEL <br />NA <br />VD (Air = 1): <br />NA <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />None <br />TWA <br />NA <br />LEL/UEL (%): <br />NA <br />STEL <br />NA <br />RGD (Air = 1): <br />NA <br />IDLH <br />NA <br />VP (mmHg): <br />NA <br />TWA - Time Weighted Average (ACGIH TLV unless noted) LEL/UEL - Lower /Upper Explosive Limit <br />STEL - Short Term Exposure Limit RGD - Relative Gas Density <br />IDLH - Immediately Dangerous to Life and Health VP - Vapor Pressure <br />Notes: Methane sensor required with MultiRAE, to be used instead of 1-112S sensor (sensors methane / LEL I <br />02 and CO). Consult JSA for specific information. <br />For methane, if 02 readings in the methane atmosphere are or anticipated to be below 19.5% and/or the LEL is a <br />concern, contact a CIH or CSP for assistance. <br />0 <br />