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CH 0.005% N NONANE 0.016% N OCTANE 0.05% N HEPTANE 0.1% HEXANE 0.1% ISOPENTANE 0.1% N PENTANE 0.3% ISOBUTANE 0.3% N BUTANE 1% CARBON DIOXIDE 1% PROPANE 2.5% NITROGEN 4% ETHANE BALANCE METHANE SIZE 150A CERTIFIED HYDROCARBON CGA 350 QUESTAR CYLINDER MUST BE MAINTAINED ABOVE 70F OR CALIBRATION ERROR MAY OCCUR CUSTOM MIX

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CH 0.005% N NONANE 0.016% N OCTANE 0.05% N HEPTANE 0.1% HEXANE 0.1% ISOPENTANE 0.1% N PENTANE 0.3% ISOBUTANE 0.3% N BUTANE 1% CARBON DIOXIDE 1% PROPANE 2.5% NITROGEN 4% ETHANE BALANCE METHANE SIZE 150A CERTIFIED HYDROCARBON CGA 350 QUESTAR CYLINDER MUST BE MAINTAINED ABOVE 70F OR CALIBRATION ERROR MAY OCCUR CUSTOM MIX

CH 0.005% N NONANE 0.016% N OCTANE 0.05% N HEPTANE 0.1% HEXANE 0.1% ISOPENTANE 0.1% N PENTANE 0.3% ISOBUTANE 0.3% N BUTANE 1% CARBON DIOXIDE 1% PROPANE 2.5% NITROGEN 4% ETHANE BALANCE METHANE SIZE 150A CERTIFIED HYDROCARBON CGA 350 QUESTAR CYLINDER MUST BE MAINTAINED ABOVE 70F OR CALIBRATION ERROR MAY OCCUR CUSTOM MIX

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Airgas Part #:X13ME90C15AC002

EP 10PPM NITRIC OXIDE 10PPM SULFUR DIOXIDE 1000PPM CARBON MONOXIDE BALANCE NITROGEN SIZE 33A EPA PROTOCOL STANDARD CGA 660

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EP 10PPM NITRIC OXIDE 10PPM SULFUR DIOXIDE 1000PPM CARBON MONOXIDE BALANCE NITROGEN SIZE 33A EPA PROTOCOL STANDARD CGA 660

EP 10PPM NITRIC OXIDE 10PPM SULFUR DIOXIDE 1000PPM CARBON MONOXIDE BALANCE NITROGEN SIZE 33A EPA PROTOCOL STANDARD CGA 660

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Airgas Part #:E04NI99E33A0017

EP 360PPM NITRIC OXIDE 3485PPM SULFUR DIOXIDE BALANCE NITROGEN SIZE 150A EPA PROTOCOL STANDARD CGA 660 (BLEND TOLERANCE +/-4% RELATIVE) (MUST BE ANALYZED AGAINST NTRM) (CERTIFY BY PROCEDURE G-1 ONLY) (MUST BE FILLED IN CHICAGO) (ALLEGHENY POWER QUARTERLY) CUSTOM MIX

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EP 360PPM NITRIC OXIDE 3485PPM SULFUR DIOXIDE BALANCE NITROGEN SIZE 150A EPA PROTOCOL STANDARD CGA 660 (BLEND TOLERANCE +/-4% RELATIVE) (MUST BE ANALYZED AGAINST NTRM) (CERTIFY BY PROCEDURE G-1 ONLY) (MUST BE FILLED IN CHICAGO) (ALLEGHENY POWER QUARTERLY) CUSTOM MIX

EP 360PPM NITRIC OXIDE 3485PPM SULFUR DIOXIDE BALANCE NITROGEN SIZE 150A EPA PROTOCOL STANDARD CGA 660 (BLEND TOLERANCE +/-4% RELATIVE) (MUST BE ANALYZED AGAINST NTRM) (CERTIFY BY PROCEDURE G-1 ONLY) (MUST BE FILLED IN CHICAGO) (ALLEGHENY POWER QUARTERLY) CUSTOM MIX

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Airgas Part #:E03NI99E15AC250

CH 40PPM OXYGEN 0.0048% N OCTANE 0.01% N PENTANE 0.0144% N HEPTANE 0.019% ISOPENTANE 230PPM NITROGEN 0.0288% HEXANE 0.03% N BUTANE 0.041% ISOBUTANE 0.087% PROPANE 0.471% ETHANE 13.02% CARBON DIOXIDE BALANCE METHANE SIZE 150 CERTIFIED HYDROCARBON CUSTOMER OWNED CGA 350 RESTRICTED MIXTURE TECHNCIAL CENTER APPROVAL NEEDED PRIOR TO PRODUCTION

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CH 40PPM OXYGEN 0.0048% N OCTANE 0.01% N PENTANE 0.0144% N HEPTANE 0.019% ISOPENTANE 230PPM NITROGEN 0.0288% HEXANE 0.03% N BUTANE 0.041% ISOBUTANE 0.087% PROPANE 0.471% ETHANE 13.02% CARBON DIOXIDE BALANCE METHANE SIZE 150 CERTIFIED HYDROCARBON CUSTOMER OWNED CGA 350 *RESTRICTED MIXTURE* TECHNCIAL CENTER APPROVAL NEEDED PRIOR TO PRODUCTION

CH 40PPM OXYGEN 0.0048% N OCTANE 0.01% N PENTANE 0.0144% N HEPTANE 0.019% ISOPENTANE 230PPM NITROGEN 0.0288% HEXANE 0.03% N BUTANE 0.041% ISOBUTANE 0.087% PROPANE 0.471% ETHANE 13.02% CARBON DIOXIDE BALANCE METHANE SIZE 150 CERTIFIED HYDROCARBON CUSTOMER OWNED CGA 350 RESTRICTED MIXTURE TECHNCIAL CENTER APPROVAL NEEDED PRIOR TO PRODUCTION

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Airgas Part #:X13ME86C150000C

Ct 950PPM Nox 4000PPM Sulfur Dioxide 8000PPM Carbon Monoxide 8% Oxygen Balance Nitrogen Size 150A Certified Standard-spec CGA 660 Stability Not Guaranteed Vendor Fill Only Custom Mix approved

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Ct 950PPM Nox 4000PPM Sulfur Dioxide 8000PPM Carbon Monoxide 8% Oxygen Balance Nitrogen Size 150A Certified Standard-spec CGA 660 Stability Not Guaranteed Vendor Fill Only Custom Mix **approved**

Ct 950PPM Nox 4000PPM Sulfur Dioxide 8000PPM Carbon Monoxide 8% Oxygen Balance Nitrogen Size 150A Certified Standard-spec CGA 660 Stability Not Guaranteed Vendor Fill Only Custom Mix approved

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Airgas Part #:X05NI90C15AC001

180PPM Sulfur Dioxide 360PPM Nitric Oxide Balance Nitrogen EPA Protocol Standard Mixture, Size 150A Aluminum Cylinder, CGA-660

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180PPM Sulfur Dioxide 360PPM Nitric Oxide Balance Nitrogen EPA Protocol Standard Mixture, Size 150A Aluminum Cylinder, CGA-660

180PPM Sulfur Dioxide 360PPM Nitric Oxide Balance Nitrogen EPA Protocol Standard Mixture, Size 150A Aluminum Cylinder, CGA-660

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Airgas Part #:E03NI99E15A41H2