ANNUAL SULFUR DIOXIDE EMISSION REPORTANNUAL SULFUR DIOXIDE EMISSION REPORTANCompany Name EnCana Oil & Gas (USA) Inc.Company NameEnCana Oil & Gas (USA) Inc.Site Name Lisbon PlantSite Name Lisbon PlantCompany ID - 1761Site ID - 10034NOTE: Be aware that this report uses different methods of calculating emissions than are required forthe 2006 Emissions Inventory.Amount Units/Yr119985538 4.1 30600904Yes 3004388 mmscf0 022006(using 1998method ofcalculation) 5538 4.1 30600904Yes 3004101.81mmscf873 btu/cu ft 032006(if method ofcalculation isdifferent from 1998)5538 4.1 30600904Yes 30040mmscf0 01998*Convert H2S to SOx1 MSCF H2S x (Mole H2S/0.3793 MSCF H2S) x 1 mole SO2/1 mole H2S x 64.0628 lb SOx/1 Mole SO2= 168.897 lbs.Tons of SOx/yr = (MCF/yr x mole % H2S x 168.9 lbs SOx/2000H2S average is 1.076Total inlet gas stream for 1998 = 17171582 MCF/yrTotal inlet sulfur plant gas stream for 1998 = 4,599792 MCF/yrAverage gas chromatograph H2S for inlet plant gas stream = 1.076%Average gas chromatograph H2S for inlet sulfur plant gas stream = 4.08%Tons of SOxin Plant inlet gas stream = 15888 tons/SOx/yrTons of SOxin sulfur plant inlet gas stream = 15849 tons SOx/yrDIFFERENCE39 tons SOx/yrCalculation:Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TotalVolume (mmscf) 7.855 7.604 9.148 7.922 8.903 7.787 9.283 8.129 6.653 6.27 14.71 7.55 101.81Mole% H2S 0.6832% 0.0000% 0.0000% 0.0124% 0.0000% 0.0000% 0.0000% 0.0920% 0.0000% 0.0105% 0.1813% 0.1414% 0.0934%SO2 emissions(tons) 4.53 0.00 0.00 0.08 0.00 0.00 0.00 0.63 0.00 0.06 2.25 0.90 8.46Breakdown SO2(tons) 7.14957.15FORMULASCONVERSION OF H2S TO SOx1 MSCF H2S * (MOLE H2S/0.3793 MSCF H2S * 1 MOLE SO2/1 MOLE H2S * 64.0628 LB SO2/1 MOLE SO2 = 168.897 LB SO2168.897 LB SO2FORMULA FOR CALCULATING TONS/YR SOXTONS SOx/YEAR = (MCF/YEAR * MOLE % H2S * 168.9 LBS SO2)/2000HeatingValue Units%SulfurThis form is to be used by sources that have emitted 100 tons or more of SO2in any calendar year after 1999, and that arenot subjectto acid rain continuous monitoring reporting requirements(40CFR Part 75). Row 1 in the following table(s) contains 1998 historical inventory data for the listed component. Row 2 is used to calculate the 2006process emissions using the same method thatwas used in 1998. The inputs required are in greenfont. To insert the new data you type over the top of the old data. Row 3 (shaded) is used to showand calculate any changes in the method ofcalculation from 1998 to 2006 (i.g. emission factors, % of sulfur, heating value, controls, breakdowns, estimation methods). If the current method of calculating the SO2emissions does not work with theequation provided in row 3, the calculation shouldbe provided in row 4. Rows 3 and 4 should have thesame calculations as contained in the 2006 Emission Inventory.Year DAQ IDPt SourceID SCC Description of ProcessNSPS(Yes/No)AssociatedStack IDRaw Material or FuelusedThroughput Generating EmissionsFlaresNatural GasDesign Rate UnitsIf Throughput is a FuelFlaresNatural GasFlaresNatural Gas42006 CalculationsMonthly gas volume (mmscf) and mole%H2S from composite samples were used to predict monthly emissions.These emissions were then totaled to determine Operating Year 2006 emissions.SO2 emissions from when H2S gas is routed to the flare during an emergency breakdown of the SEI are now included in the total of SO2 emissions from the flare.EnCana-2005Page 1ANNUAL SULFUR DIOXIDE EMISSION REPORTANNUAL SULFUR DIOXIDE EMISSION REPORTEnCana Oil & Gas (USA) Inc.Secondary Control0* 39 2Mass balanceShow calculation0**15.6057.14952 Mass balance 168.8974 lbsMole % was obtained frommonthly composite samples.002Mass balance%AshName ofPrimary ControlHow Sulfur Content iscalculatedEstimateMethodEmissionFactor Units How mole % H2S is calculatedControlEfficiency(%)Emissions(tons/yr)EmissionsfromBreakdown(tons/yr)EstimateCodeControlCode (SeeList)Name ofSecondaryControlControlCode(See List)If Throughput is a FuelPrimary ControlEnCana-2005Page 2ANNUAL SULFUR DIOXIDE EMISSION REPORTEnCana-2005Page 3ANNUAL SULFUR DIOXIDE EMISSION REPORTEnCana-2005Page 4ANNUAL SULFUR DIOXIDE EMISSION REPORTAmount Units/Yr119985539 4.2 30609904Yes 3005511 mmscf992 btu/cu ft 022006(using 1998method ofcalculation) 5539 4.2 30609904Yes 3005275.65mmscf985btu/cu ft 032006(if method ofcalculation isdifferent from 1998)5539 4.2 30609904Yes 3005275.65mmscf985btu/cu ft 0EQUIPMENT NOT RUN IN 1998 THAT EMITS SOxDAQ ID POINT SOURCE ID DESCRIPTION OF PROCESS2006 SOxTONS/YEAR5524 1.1 Reciprocating Driven IC Engine #10.015525 1.2 #2 KVG Reciprocating Driven IC05526 1.3 Reciprocating Driven IC Engine #30.015527 1.4 Reciprocating Driven IC Engine #40.0135528 1.5 Reciprocating Driven IC Engine #50.0035529 2.1 Turbine Driven IC Engines #5, Solar05530 2.2 Turbine Driven IC Engines #7, Solar05531 2.3 Turbine Driven IC Engines #1, refrig05532 2.4 Turbine Driven IC Engines #2, refrig05533 2.5 Turbine Driven IC Engines #1, gas set05534 2.6 Turbine Driven IC Engines #2, gas set05535 3.1 Furances cryo-reg gas heaters0.0015536 3.2 Furances ht. Med. Htr0.035537 3.3 Furances Frac. Reg Gas htr0170774 8 Waukesha 7042 GSI-E4A0.026170775 9 Waukesha 7042 GSI-E4B0.025TOTAL 0.118Year DAQ IDPt SourceID SCCHeatingValue Units%SulfurDescription of ProcessNSPS(Yes/No)AssociatedStack IDRaw Material or FuelusedIncineratorNatural GasThroughput Generating EmissionsDesign Rate UnitsIf Throughput is a FuelIncineratorNatural GasIncineratorNatural Gas42006 CalculationsEnCana-2005Page 5ANNUAL SULFUR DIOXIDE EMISSION REPORTSecondary Control045 941 CEM tpy045 9401 CEM tpy0459401 CEMtpyCOMPONENT CURRENT ADJUSTED5538 15.605 15.6055539 102.07 102.07Subtotal 117.675 117.675Other 0.118 0.118Total 117.793 117.793How Sulfur Content iscalculated%AshEmissionFactor UnitsPrimary ControlControlEfficiency(%)Emissions(tons/yr)EmissionsfromBreakdown(tons/yr)Name ofPrimary ControlControlCode (SeeList)Name ofSecondaryControlControlCode(See List)Sulfur recovery unit1438.7EstimateCodeEstimateMethodIf Throughput is a FuelSulfur Enrichment & Injection(SEI) unit and the SulfurRecovery Unit (SRU). The SRUwas offline in 2006.102.07Sulfur recovery unit102.07EnCana-2005Page 6