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GAS QUALITY SPECIFICATIONS

GAS QUALITY SPECIFICATIONS. Docket # 04-057-09 Technical Conference October 21, 2004. Approximate Interchangeability Ranges. QGC South Post – 1998 (e.g. Payson). QGC Pre-1998 Range. QGC North Post-1998 Range (e.g. Little Mountain). Est KRGT Range @ 4% inert, 15F HCDP. 960. 980. 1000.

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GAS QUALITY SPECIFICATIONS

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  1. GAS QUALITY SPECIFICATIONS Docket # 04-057-09 Technical Conference October 21, 2004

  2. Approximate Interchangeability Ranges QGC South Post – 1998 (e.g. Payson) QGC Pre-1998 Range QGC North Post-1998 Range (e.g. Little Mountain) Est KRGT Range @ 4% inert, 15F HCDP 960 980 1000 1020 1040 1060 1080 1100 BTU Docket # 04-057-09 Technical Conference October 21, 2004

  3. Questar Gas Btu Delivery Ranges(1995 – Present) Docket # 04-057-09 Technical Conference October 21, 2004

  4. Docket # 04-057-09 Technical Conference October 21, 2004

  5. Gas Quality SpecificationsPipeline Interconnects to QGC Questar Pipeline Kern River Pipeline Minimum BTU 950 970 Maximum BTU 1150 - Total Inert 3% 4% Total Nitrogen - 3% Total CO2 - 3% Hydrocarbon Dew Point - 15°F up to 800 psig Hydrocarbon Liquids Gas shall not contain any Will contain no hydrocarbons hydrocarbon fractions that in liquid form at the might condense to free temperature & pressure at liquids under normal which the gas is delivered. pipeline operation conditions. Docket # 04-057-09 Technical Conference October 21, 2004

  6. Gas Composition Coal Seam Gas 984 0.588 96.4% 0.27% 0.0543% 0.0139% 0.0018% 2.5% -110.5° 0.18% 1283 Uinta Basin Gas 1115 0.632 90.7% 5.06% 1.95% 0.863% 0.5923% 0.629% 70.4° 0.24% 1402 Northern Gates Gas 1070 0.616 92.0% 4.35% 1.20% 0.491% 0.315% 0.629% 40.9° 0.48% 1363 Representative Btu Specific Gravity Percent Methane(1010 Btu/Scf) Percent Ethane(1789 Btu/Scf) Percent Propane(2516 Btu/Scf) Percent Butane(3250 Btu/Scf) Percent C5+(5500+ Btu/Scf) Percent CO2 Hydrocarbon Dewpoint* Percent Nitrogen Wobbe (W = HV/G) *Calculated dew point at pipeline delivery pressure. Docket # 04-057-09 Technical Conference October 21, 2004

  7. Docket # 04-057-09 Technical Conference October 21, 2004

  8. Gas & Liquid Gas Liquid HDP @ Operating Pressure Cricondentherm Temperature Docket # 04-057-09 Technical Conference October 21, 2004

  9. Phase Envelope for Kern River Gas 1000 900 Gas 800 700 600 Pressure (psia) 500 Gas & Gas Liquid 400 300 Cricondentherm Temperature Cricondentherm Temperature 200 HDP @ Operating Pressure 100 0 -250 -200 -150 -100 -50 0 50 100 Temperature (F) Docket # 04-057-09 Technical Conference October 21, 2004 Bubble Point Dew Point Critical Point

  10. POTENTIAL NEW SUPPLIES THAT WILL IMPACT QUESTAR PIPELINE Powder River Basin Max. Btu -1150 Min. Btu -984 4 New Developments 26 Active Producers KRGT (Roberson Creek) CIG WIC Southern Star Overthrust Pipeline ML’s 1/13/15 Eakin Kanda ML 22 QGC (Northern Wasatch Front) Min. - 950 Btu/CF Max.– 1150 Btu/CF Green River Basin Max. Btu-1176 Min. Btu-1025 6 New Developments 14 Active Producers East Fields Max. Btu-1150 Min. Btu-950 12 New Developments 9 Active Producers Overthrust Max. Btu-1170 Min. Btu-1000 0 New Developments 4 Active Producers ML58/101 NPC (Clay Basin) ML 80 QGC (Payson) Min. - 950 Btu/Cf Max. – 1150 Btu/CF JL 47 Price Fidlar Greasewood ML 40/41 ML 40 ML 68 Uinta Basin Max. Btu-1150 Min. Btu-1020 0 New Developments 14 Active Producers Piceance Basin Max. Btu-1200 Min. Btu-1020 1 New Developments 12 Active Producers Davis Plant - 3rd Party Oak Spring ML 104 TransColorado Ferron Max. Btu-1060 Min. Btu-984 0 New Developments 17 Active Producers CO2 Plant KRGT (Goshen) Min. – 970 Btu/CF Max.– No Limit Btu/CF Docket # 04-057-09 Technical Conference October 21, 2004

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