# RE: McElmo Main Flare: Pat's 12/06/10 letter

Dwight Mallory to: Andrew Chew 04/18/2012 03:22 PM

Cc: Shaheerah Kelly, Cleveland Holladay, Tom Mintz, "Patrick Flynn",

"John Jacus", Randy.Dann



# Andrew,

Thanks for the follow up email and phone call. As we discussed during

the call this morning, GHG emissions for the MCU CO2 recycle facility

are attached.

I look forward to your comments on the modeling discussion. In the

meantime, I will follow up on the Class I area impacts and ESA issues

with Mr. Notar and Mr. Maddux respectively and will forward copies of

any correspondence with them to you as soon as possible.

Please call or email if you need anything else.

Dwight E. Mallory

Environmental, Health & Safety Coordinator

Resolute Energy Corporation

1675 Broadway, Suite 1950

Denver, CO 80202

Direct: 303-573-4886 X 1165

Cell: 970-302-8620

Email: dmallory @ ResoluteEnergy

. com

From: A ndrew Chew [mailto:Chew. A ndrew@epamail.epa.gov]

Sent: Wednesday, A pril 18, 2012 11:56 A M

To: Dwight Mallory

Cc: Shaheerah Kelly; Cleveland Holladay; Tom Mintz

Subject: McElmo Main Flare: Pat's 12 / 06 /

10 letter

Hi Dwight,

To be frank and honest, we wish we can narrow down the list further

than what was bulleted in Pat's letter, but we're still a little ways away.

For the Class I area impacts and ESA issues, please get separate

confirmations from the federal land manger and Fish and Wildlife

Service that their 2006 assessment statements apply to this day if the

PSD Main Flare permit were to be issued in a few months.

Also, we're reviewing McVehil Monnet's 6/1/11 report on 1-hr SO2

modelling and plan to let you know our findings next week. While Scott

believed that the 1-hr NO2 modelling work was sufficient, he asked that

1-hr SO2 modelling work to be more specific. However, since Scott is

no longer on this project, Cleve Holladay of our agency will be helping

me with reviewing the modelling work.

Finally, we would need GHG CO2e emissions quantification so that the

record reflects what's found. Shaheerah Kelly, my peer in our Air

# Permits office, will be partnering with me to help move the permi t

process along. She's very knowledgeable and has been with the

agency for more than 7 years. I plan to include her in future

correspondence and meetings. Thanks again.

- Andrew

------------------------------------------- Andrew Chew, P.E.

T: (415) 947-4197 | F: (415) 947-3579 | chew

. andrew @ epa

. gov U.S. EPA, Region 9, Air Permits Office ( AIR-3) | 75 Hawthorne St., San

Francisco, CA 94105

From: "Dwight Mallory" < dmallory @ ResoluteEnergy

. com >

To: A ndrew Chew/R9/USEPA/US@EPA

Date: 04/17/2012 11:28 A M

Subject: RE: Pat's 12/06/10 letter



# Andrew,

Thanks for sending the letter. Based on our conversation in reference to the

bullet list of requested information on page 2, it is my understanding that you

are requesting information to address the review of the Class I area impacts

and Endangered Species sections of the PSD application.

We have reviewed the Class I area impacts and Endangered Species sections of

the PSD application. Because the previous Class I area and Endangered Species

assessments and findings were based on the maximum facility emissions

allowable under the Consent Decree emission limits and the annual averaged

emissions from the SCREEN 3 modeling scenario, and inasmuch as neither the

Consent Decree emission limits nor the modeling inputs have been modified;

we believe that the Class I area impacts and Endangered Species impacts

analyses provided in the PSD application are still valid and no update is

needed.

It is also my understanding that McVehil Monnet discussed the potential need

for additional air quality modeling to address the 1 hour NAAQS standard for

SO2 with Scott Bohning at EPA and that they were in agreement that

additional modeling, and thus additional assessment of impacts to Class I areas

and Endangered Species, were unnecessary.

Please contact me if you require additional information.

# Dwight E. Mallory

Environmental, Health & Safety Coordinator

Resolute Energy Corporation

1675 Broadway, Suite 1950

Denver, CO 80202

Direct: 303-573-4886 X 1165

Cell: 970-302-8620

Email: dmallory @ ResoluteEnergy

. com

From: A ndrew Chew [ mailto : Chew

. A ndrew @ epamail

. epa

. gov ]

Sent: Monday, A pril 16, 2012 4:52 PM

To: Dwight Mallory

Subject: Pat's 12 / 06 /

10 letter

- Andrew

------------------------------------------- Andrew Chew, P.E.

T: (415) 947-4197 | F: (415) 947-3579 | chew

. andrew @ epa

. gov U.S. EPA, Region 9, Air Permits Office ( AIR-3) | 75 Hawthorne St., San

Francisco, CA 94105 MCU GHG Estimate.xlsx

# MCELMO CREEK UNIT REINJECTION FACILITY

GHG Emissions Estimate

FLARE STACK 26,122 Metric Tons CO2e

GYYCOL DEHYDRATOR 1,092 Metric Tons CO2e

COMPRESSOR ROD PACKING VENTING 242.1 Metric Tons CO2e

EQUIPMENTS LEAKS 51 Metric Tons CO2e



# Total Facility GHG Emissions 27,507 Metric Tons CO2eMCELMOCREEKUNITREINJECTIONFACILITYGHGEmissionsfromFlareStackRef98.232(C)(9)MCUMainFlare(basedon2011FlareVolume)EnterFlareVolume423,359mcfFlareGasHHV0.000324597mmbtu/scfGasContentCO259.819Mole%GasMethaneContentCH417.63Mole%GasEthaneContentC2H65.897Mole%GasPropaneContentC3H84.039Mole%GasButaneContentC4H101.974Mole%GasPentane+ContentC5H12+1.109Mole%TotalCO225,512MetricTonsTotalCH4605MetricTonsCo2eTotalN2O4MetricTonsCo2eTotalGHGEmissions26,122MetricTonsCo2eTotalGHGEmissions28,794ShortTonsTotalCO2481,365,282scfTotalCH41,492,765scfUncombustedCH4EaCH4(uncombusted) VaƞXCH4EaCH4(uncombusted)=Va*(1‐ƞ)*XCH41,492,765 scf 423359300 0.98 0.1763UncombustedCO2EaCO2(uncombusted)VaXCO2EaCO2(uncombusted)=Va*XCO2253,249,300 scf 423359300 0.59819TotalCO2fromHydrocarbonCombustionEaCO2(combusted)=∑jƞ*Va*Yj*RjEaCO2(combusted)228,115,982 scfIndividualHydrocarbonsCO2fromCombustionEaCO2(combusted)=ƞ*Va*Yj*RjEaCO2(combusted)ƞVaYjRjMethane73,145,480 0.98 423359300 0.1763 1Ethane48,932,376 0.98 423359300 0.05897 2Propane50,272,477 0.98 423359300 0.04039 3Butane32,759,881 0.98 423359300 0.01974 4PentanePlus23,005,768 0.98 423359300 0.01109 5WhereEaCH4(uncombusted)=uncombustedCH4incubicfeetEaCO2(uncombusted)=uncombustedCO2incubicfeetEaCO2(combusted)=CO2fromcombustionincubicfeetVa=AnnualFlareVolumeinscfƞ=Fractionofgascombustedbyflare(.98)XCH4=MolefractionofCH4ingasXCO2=MolefractionofCO2ingasstreamYj=Molefractionofhydrocarboningas(methane+)Rj=Numberofcarbonatomsinthegashydrocarbonconstituent(1formethane,2forethane,3forpropane,4forbutaneand5forpentanesplus)N2OfromCombustion0.01 MtN2O=(1*10^3)*Fuel*HHV*EFWhereN2O=AnnualN2Oemissionsfromcombustioninmetrictons1*10^‐3=ConversionfromkgtometricTonsFuel=Massorvolumeoffuelcombustedperyear(Va)HHV=Highheatvalueoffuelfromparagraphs(z)(8)(i)or(z)(8)(iii)EF=1.0*10^‐4kgN2O/mmbtuMassConversionandGlobalWarmingPotentialMasssj=Esj*ρi*GWP*10^‐3WhereMasssj=MassGHGEmissionsinMetricTonsCO2eEsj=GHGvolumtricemissionsinscfρi=DensityofGHGofinterest:0.0530kg/ft3forCO2andN2O,0.0193kg/ft3forCH4GWP=GlobalWarmingPotential:1forCO2,21forCH4,310forN2OMCUPlantDehydrationUnitGHGEmissionCalculationsRef98.232(C)(14)FlashGasParametersFlashGasscf/yr:5,439,960 CondenserVentscf/yr:14,366,400DestructionEff:95% DestructionEff:95%CO2MoleFraction:0.83 CO2MoleFraction:0.46CH4(C1)MoleFraction:0.03 CH4(C1)MoleFraction:0.12C2MoleFraction:0.03 C2MoleFraction:0.04C3MoleFraction:0.04 C3MoleFraction:0.03C4MoleFraction:0.03 C4MoleFraction:0.02C5+MoleFraction:0.02 C5+MoleFraction:0.08ActualTemperature65°F StandardTemperature60°FActualPressure12.2 psia StandardPressure14.696 psiaUn‐CombustedCH496,012.58 ft3 Un]CombustedCH478,946.02 ft3Un‐CombustedCO211,096,931.48 ft3 Un]CombustedCO29,124,414.49 ft3CombustedC1(asCO2)1,824,238.99 ft3 CombustedC1(asCO2)1,499,974.36 ft3CombustedC2(asCO2)1,533,345.14 ft3 CombustedC2(asCO2)1,260,787.87 ft3CombustedC3(asCO2)2,035,198.36 ft3 CombustedC3(asCO2)1,673,434.99 ft3CombustedC4(asCO2)1,822,980.37 ft3 CombustedC4(asCO2)1,498,939.46 ft3CombustedC5+(asCO2)6,004,572.34 ft3 CombustedC5+(asCO2)4,937,239.36 ft3Un‐CombustedCH432 metrictonsUn‐CombustedCO2483.59 metrictonsCombustedC179.5 metrictonsCombustedC266.82 metrictonsCombustedC388.69 metrictonsCombustedC479.44 metrictonsCombustedC5+261.67 metrictonsN2O0.76 metrictonsTotal:1,092.48 metrictonsofCO2eValuesfromGRIGlyCalcrunbyLesairEnvironmental3/16/2011FlashGasandCondenserVentEmissionsatStandardConditionsFlashGasandCondenserVentEmissionsatActualConditionsGHGEmissionsatStandardConditionsCondenserVentParameters

# GHG Emissions from Reciprocal Compressor Packing

Ref 98.232 (C)(11)

Equation W

‐ 29 from 40 CFR 98.233

E CH4 

# 28,440 scf

E C02 

# 1,581 scf

Compressor Count 3

EF CH4 9,480

EF CO2 527

Total CH4 12 Metric Tons

Total CO2 0 Metric Tons

Total CO2e 242 Metric Tons CO2e

# GHG Emissions from Equipment Leaks

Ref 98.232 (C)(21)

(refer to equation W

‐ 31, Subpart W to Part 98)

Valves Connectors Open Ended Lines Other

Wellhead 11 36 1 0

Separator 34 106 6 2

Meters/Piping 14 51 1 1

Compressors 73 179 3 4

In

‐ Line Heaters 14 65 2 1

Dehydrators 24 90 2 2

Total Whole Gas Emissions 493,013 scf

E CO2 

# 294,915 scf

E CH4 

# 86,943 scf

E CO2 

# 16 Metric Tons CO2e

E CH4 

# 35 Metric Tons CO2e

Total GHG Emissions 51 Metric Tons CO2e Avg Default Values from Table W

‐ 1B to Subpart W of Part 98

# Valves Connectors Open Ended Lines

Wellhead 0 0 0 0

Separator 2 68 212 12

Meters/Piping 4 56 204 4

Compressors 3 219 537 9

In

‐ Line Heaters 0 0 0 0

Dehydrators 1 24 90 2

Totals 367 1,043 27

EF (from Table W

‐ 1A)* 0.123 0.005 0.032

Whole Gas Emissions (scf/hr) 45.141 5.215 0.864 Facility Equipment Count Facility Total Components

# Other

0

4

4

12

0

2

22

0.23 * Western US factors for gas service were used

5.061AlloftheMCUCO2recyclefacilitypneumaticequipmentoperatesoninstrumentair23AlloftheMCUCO2recyclefacilitypneumaticequipmentoperatesoninstrumentair4NotapplicabletotheMCUCO2recyclefacility5NotapplicabletotheMCUCO2recyclefacility6NotapplicabletotheMCUCO2recyclefacility7NotapplicabletotheMCUCO2recyclefacility8NotapplicabletotheMCUCO2recyclefacility9Calculationsincluded10TherearenohydrocarbonstoragetanksattheMCUgasrecyclefacility11Calculationsincluded12NotapplicabletotheMCUCO2recyclefacility13NotapplicabletotheMCUCO2recyclefacility14Calculationsincluded1516TherehavebeennoreportedEORinjectionpumpblowdownsattheMCUCO2recyclefacility17NotapplicabletotheMCUCO2recyclefacility18NotapplicabletotheMCUCO2recyclefacility19NotapplicabletotheMCUCO2recyclefacility2021Calculationsincluded22NotapplicabletotheMCUCO2recyclefacilityStoragetanksventedemissionsfromproducedhydrocarbons40CFR98.232(c)ForanonshorepetroleumandnaturalCO2productionfacility,reportCO2,CH4,andN2Oemissionsfromonlythefollowingsourcetypesonawellpadorassociatedwithawellpad:Naturalgaspneumaticdeviceventing[Reserved]NaturalgasdrivenpneumaticpumpventingWellventingforliquidsunloadingGaswellventingduringwellcompletionswithouthydraulicfracturingGaswellventingduringwellcompletionswithhydraulicfracturingGaswellventingduringwellworkoverswithouthydraulicfracturingGaswellventingduringwellworkoverswithhydraulicfracturingFlarestackemissionsYoumustusethemethodsin§98233zandreportunderthissubparttheemissionsofCO2,CH4,andN2Ofromstationaryorportablefuelcombustionequipmentthatcannotmoveonroadwaysunderitsownpoweranddrivetrain,andthatarelocatedatanonshoreproductionwellpadStationaryorportableequipmentarethefollowingequipmentwhichareintegraltotheextraction,processingormovementofoilornaturalgas:Welldrillingandcompletionequipment,workoverequipment,naturalgasdehydrators,naturalgascompressors,electricalgenerators,steamboilers,andprocessheatersReciprocatingcompressorrodpackingventingWelltestingventingandflaringAssociatedgasventingandflaringfromproducedhydrocarbonsDehydratorvents[Reserved]EORinjectionpumpblowdownAcidgasremovalventsEORhydrocarbonliquidsdissolvedCO2Centrifugalcompressorventing[Reserved]Equipmentleaksfromvalves,connectors,openendedlines,pressurereliefvalves,pumps,flanges,andotherequipmentleaksourcessuchasinstruments,loadingarms,stuffingboxes,compressorseals,dumpleverarms,andbreathercaps.