Spreadsheet Note:

The spreadsheet is setup to pick up flaring of all flares and during FGRU trip or an exceedance of FGRU pumping capacity (going to flare caused by upset, shutdown, etc.)

For FGRU : E10FI9239.PV read the flow of flare gas recovered and routed to the fuel system.

For Flares: E10PC9471.PV reads the pressure of flare header (in H2O) E10LI9220.PV shows the designated water seal level in 1st stage flare K.O. Drum (in H2O).

Flow estimation is set at two conditions:

If FGRU is in service, the flow rate is estimated with the setup equations for all flares.

The average flare base load used in constructing this sheet was 434016 SCFD

36" Flow Equation: 36" flare flow/minute = 65.1MSCFD+896.91MSCFD(flare pressure^0.5-seal level^0.5)/1440 minutes If FGRU is down, any

off gas discharge to flare header would be flaring at once the water seal is exceeded in the 36" Flare and the last flow rate from E10FI9239.PV would be used as the flaring flow rate until FGRU back in service. The flow rate to the 24" flare is determined by using flow indicator E29FC5134.PV. Any flow on this flow indicator is an idication of flare gas bypassing the fuel system to the 24" flare.

The slope (896.91 MSCFD) for the 36" flare is based on the average base load and the average delta P between the flare pressure and the seal level in " H2O for the flaring event starting 1/21/08 and ending 1/22/08 The intercept (65.1 MSCFD) for the 36" flare flow calculation is 15% of base load and is used to ensure calculation is conservative from a release stand point

5/17/2012 Page 1of 1 0900006481012aed.xls Documentation

### East Plant - Flexible Limits

**Current date and time:** 7/10/2009 10:22 **One week ago:** 7/3/2009 10:22

**Al lowable**  **CA P (lb/hr)**  Last W k's

Avg (lb/hr) % of CAP Current (lb/hr) % of CAP

EPNOXCAP.#1 E. Plant hrly NOx Cap Calc **427.79** 74.83 17.49 71.88 16.80 EPCO-CAP.#1 E. Plant hrly CO Cap Calc **297.78** 25.32 8.50 23.37 7.85 EPSO2CAP.#1 E. Plant hrly SO2 Cap Calc **275.42** 9.92 3.60 7.10 2.58 EPPM-CAP.#1 E. Plant hrly PM Cap Calc **50.00** 27.98 55.96 28.13 56.26 EPVOCCAP.#1 E. Plant hrly VOC Cap Calc **639.6** 19.94 3.12 20.09 3.14

NOTES: (1) Any

Em issions from Flaring must be added to the actual CAP (lb/hr) values to calculate Total Emissions. (2) The VOC allowable Cap includes only combustion sources (does not include tanks, fugitives, cooling towers, loading, etc.)

5/17/2012 1:37 PM 0900006481012aed.xls CAP - Flexible Permit**Calculation of Flare Emissions: West Plant Date and time when flaring began:**  **7/3/2009 0:00** Date of Report **7/10/2009 0:00 Date and time when flaring ended:**  **7/3/2009 6:15** Report Author S. Peters FIN: E01FL100 EPN: FL-97 RN No.: RN100235266
**Incident:** Air Account No: NE-0122-D **Time set up earlier: 0**  **min** 36" Flare Destruction Effiency: 98 % **Time interval: 1**  **min** 24" Flare Destruction Efficiency: 98 % **Time prolong: 0**  **min Plant Site:**  **East**

***** **Use 701FCD sample on the "36 Inch Flare" sheet.**

***** **Use 714FSF sample on the "24 Inch Flare" sheet. If not available use 721 MFD.**

***** **If in the sample results ppmv is used as a unit of measure the unit will need to be converted to mol% for the purposes of the calculation**

***** **For all species of butanes, butenes, hexanes, pentanes and octanes aggregate the total for each family for a RQ determination.**

***** **If a smoking flare is noticed adjust the destruction efficiency on the flare calcs to account for incomplete combustion (normally 98%, if smoking adjust to 93%).**

***** **TCEQ Technical Supplement 4 for flare (TCEQ publication RG-360A) recommends 93% destruction efficiency for smoking flares.**

**Average flow to flare:**

**- MSCFH**  **24 Inch Flare Duration of flaring:** 

**- min**  **Total amount flared:**

**- SCF**  **Average flow to flare: 672**  **MSCFD 36 Inch Flare**  **Duration of flaring: 26**  **min Total amount flared:**  **12,134 SCF** 

**Summary of Flare Emissions Reportable Quantity**  24 Inch Flare 36 Inch Flare Total **CH4 (Methane): 0.0**  **0.9 0.9**  **lb Green house effect**  **CH2 (Ethane): 0.0**  **0.3 0.3**  **lb Green house effect**  **C2H4 (Ethylene): 0.0**  **0.2 0.2**  **lb** 5,000 **C3H8 (Propane): 0.0**  **0.6 0.6**  **lb** 5,000 **C3H6 (Propylene): 0.0**  **0.4 0.4**  **lb** 5,000 **I-C4 (iso-Butane): 0.0**  **0.4 0.4**  **lb** See butanes (any isomer) **nC4 (n-Butane): 0.0**  **1.5 1.5**  **lb** See butanes (any isomer) **C4=1 (1-Butene): 0.0**  **0.0 0.0**  **lb** See butenes (any isomer) **IC4= (iso-Butene): 0.0**  **0.1 0.1**  **lb** See butenes (any isomer) **TC4= (trans-2-Butene): 0.0**  **0.0 0.0**  **lb** See butenes (any isomer) **CC4= (cis-2-Butene): 0.0**  **0.0 0.0**  **lb** See butenes (any isomer) **C4== (1,3-Butadiene): 0.0**  **0.0 0.0**  **lb** 10 **IC5 (iso-Pentane): 0.0**  **4.4 4.4**  **lb** See pentanes (any isomer) **NC5 (n-Pentane): 0.0**  **0.5 0.5**  **lb** See pentanes (any isomer) **C6+ (Hexane plus) 0.0**  **0.8 0.8**  **lb** 5,000 **Butanes (any isomer): 0.0**  **1.9 1.9**  **lb** 5,000 **Butenes (any isomer): 0.0**  **0.2 0.2**  **lb** 5,000 **Pentanes (any isomer): 0.0**  **0.9 0.9**  **lb** 5,000

**Benzene: 0.0**  **0.0 0.0**  **lb  10 ** SO** **2 :**  **0.0 46.9**  **46.9 lb**  500 **Total NOx : 0.0**  **0.9 0.9**  **lb** 200 **CO : 0.0**  **4.4 4.4**  **lb** 5,000 **H 2**  **S: 0.0**  **0.5 0.5**  **lb** 100

Destruction efficiencies and flare factors are from the "July 1996 TNRCC Technical Guidance Package for Flare Sources" Assume C6+ compounds are **3.3** % benzene. **This spread sheet is setup to pick up flaring time** **for 24 and 36 Inch flares. Please make the necessary agency notifications in time. Enter Date & time, time frame parameters,**  **then press F9 to Calculate.**

**Flare Release Summary**

5/17/2012 Page 1of 1 0900006481012aed.xls Main**Flaring Flow Rate Calculation**

**Date and time when flaring began: 7/3/2009 0:00**  **Time set up earlier: min**  E10FI9239.PV **Date and time when flaring ended: 7/3/2009 6:15**  **Time interval: 1**  **min 1st flare flow equation constant**  **Time prolong: min**  **65.1 Intercept**  **36" Flare efficiency: 98**  **% 896.91**  **Slope 24" Flare efficiency:**  **98 %** 

**Average flow to flare:**  **672 MSCFD**  9/18/2013 13:36 **36 Inch Flare Duration of flaring:**  **26 min**  **Total amount flared: 12,134**  **SCF Duration of flaring:** 

**- MSCFD**  **24 Inch Flare Duration of flaring:** 

**- min**  **Total amount flared:**

**- SCF** 

**36 Inch Flare 24 Inch Flare**  7/3/2009 5:06

**E10PC9471.PV E10LI9220.PV**  **Flaring (min) E29FC5134.PV**  **E29FC5134.OP Flaring (min)** 

**Flare Gas Header Water Seal Drum V110**  **26 12.134**  **Recovered Gas to 24 Flare**  **Recovered Gas to 24 Flare**  **36 Inch 24 Inch**  **Date / Time inH2O**  **inH2O counter**  **MSCF SCFM**  **% counter**  **SCFM Indicator**  **Indicator** 7/3/2009 0:00 15.03 52.33 65.35 7/3/2009 0:01 15.05 52.31 63.55 7/3/2009 0:02 15.07 52.31 57.81 7/3/2009 0:03 15.05 52.31 60.11 7/3/2009 0:04 15.05 52.31 63.55 7/3/2009 0:05 15.04 52.31 63.55 7/3/2009 0:06 15.06 52.31 61.70 7/3/2009 0:07 15.06 52.31 61.70 7/3/2009 0:08 15.05 52.31 59.79 7/3/2009 0:09 15.03 52.31 59.79 7/3/2009 0:10 15.05 52.31 59.79 7/3/2009 0:11 15.00 52.31 59.79 7/3/2009 0:12 14.99 52.31 65.35 7/3/2009 0:13 14.99 52.31 61.70 7/3/2009 0:14 15.01 52.31 61.70 7/3/2009 0:15 15.07 52.31 59.79 7/3/2009 0:16 15.04 52.31 61.70 7/3/2009 0:17 15.01 52.31 67.10 7/3/2009 0:18 15.01 52.31 67.10 7/3/2009 0:19 15.04 52.31 63.55 7/3/2009 0:20 15.02 52.31 63.55 7/3/2009 0:21 15.00 52.31 65.35 7/3/2009 0:22 15.01 52.31 63.55 7/3/2009 0:23 15.02 52.31 63.55 7/3/2009 0:24 15.01 52.31 65.35 7/3/2009 0:25 15.00 52.31 63.55 7/3/2009 0:26 15.01 52.31 65.35 7/3/2009 0:27 15.03 52.31 61.70 7/3/2009 0:28 15.03 52.31 61.70 7/3/2009 0:29 15.03 52.31 67.10 7/3/2009 0:30 15.04 52.31 61.70 7/3/2009 0:31 14.98 52.30 59.79 7/3/2009 0:32 15.03 52.31 59.79 7/3/2009 0:33 15.00 52.31 59.79 7/3/2009 0:34 15.00 52.31 65.35 7/3/2009 0:35 15.00 52.31 65.35 7/3/2009 0:36 15.05 52.31 63.16 7/3/2009 0:37 15.04 52.31 59.79 7/3/2009 0:38 15.01 52.31 63.55 7/3/2009 0:39 14.99 52.31 67.10 7/3/2009 0:40 15.01 52.31 59.79 7/3/2009 0:41 15.00 52.31 59.79 7/3/2009 0:42 15.00 52.31 59.79 7/3/2009 0:43 15.02 52.31 57.81 7/3/2009 0:44 15.04 52.31 61.70 7/3/2009 0:45 15.03 52.31 59.79 7/3/2009 0:46 15.00 52.31 65.35 7/3/2009 0:47 15.01 52.31 61.70 7/3/2009 0:48 15.02 52.31 63.55 7/3/2009 0:49 15.00 52.31 61.70 7/3/2009 0:50 15.07 52.31 65.35 7/3/2009 0:51 15.06 52.31 65.35 7/3/2009 0:52 15.06 52.31 61.70 7/3/2009 0:53 15.05 52.31 61.70 7/3/2009 0:54 15.05 52.31 63.55 7/3/2009 0:55 15.05 52.31 61.70 7/3/2009 0:56 15.02 52.31 61.70 7/3/2009 0:57 15.04 52.31 62.04 7/3/2009 0:58 15.03 52.31 65.35 7/3/2009 0:59 15.00 52.31 61.70 7/3/2009 1:00 14.99 52.31 61.70 **Flare Release Summary**

5/17/2012 Page 1of 1 0900006481012aed.xls Flare Flow

### Calculation of Flare Emissions: West Plant **Date and time when flaring began: Date and time when flaring ended:**  **Incident: 0**  

### Time set up earlier: **Time interval: Time prolong:** 
Volum e of Flare Piping and Equipment=

**Total Release to Flare = 12,134**  **SCF**

**MW Component**  **vol % SCF**  **lb-mol (lb/lb-mol)**  #H2:Hydrogen,mol% 38.04 4,615 12.16 2.02 #N2: Nitrogen 32.55 3,949 10.41 28.01 #O2: Oxygen 0.00

- 0.00 32 #CO: Carbon Monoxide 0.00

- 0.00 28.01 #CO2: Carbon diOxide 0.06 8 0.02 44.01 #H2S: Hydrogen Sulfi 2.34 284 0.75 34.08 #C1: Methane 8.68 1,054 2.78 16.04 #C2=: Ethylene 1.15 140 0.37 28.06 #C2: Ethane 1.43 174 0.46 30.08 #C3: Propane 2.17 263 0.69 44.11 #C3=: Propylene 1.45 175 0.46 42.09 #IC4: iso-Butane 1.13 137 0.36 58.14 #IC4=: iso-Butene 0.16 19.54 0.05 56.12 #C4=1: 1-Butene 0.10 12.26 0.03 56.12 #C4==: 1,3-Butadiene 0.00

- 0.00 54.09 #NC4: n-Butane 4.08 495 1.31 58.14 #TC4=: trans-2-Buten 0.12 14.68 0.04 56.1 7/3/2009 0:00 7/3/2009 6:15

#TC4=: trans-2-Buten 0.12 14.68 0.04 56.1 #CC4=: cis-2-Butene 0.10 12 0.03 56.1 #IC5: iso-Pentane 9.47 1,148 3.03 72.15 #NC5: n-Pentane 1.01 122 0.32 72.15 #C6+: Hexane plus 1.43 174 0.46 86.17 Benzene 0.00

- - 78.11 Total **105.46** 12797 26.511 **Total VOC (C3+) =**

**VOC emissions from flare, assuming 98**  % destruction efficiency*:

= 0.02 447 lb VOC to flare

= **8.94** lb VOC to atmosphere from flare

**H2S emissions from flare, assuming 98**  % destruction efficiency*:

= 0.02 25 lb H2S to flare

= **0.51** lb H2S to atmosphere from flare**Combustion emissions:**

TNRCC Flare Emission Factors* NOx (lb/MMBtu) Steam -assisted: High Btu (>1000 Btu/scf) 0.0485 Low Btu (192-1000 Btu/scf) 0.068 Air-assisted: High Btu (>1000 Btu/scf) 0.138 Low Btu (192-1000 Btu/scf) 0.0641

Flare emission factors: NOx = 0.0680 lb/MMBtu CO = 0.3465 lb/MMBtu

Using emission factors,

Am bient NOx emissions = 13 MMBtu 0.068

= **0.86** lb NOx

CO emissions = 13 MMBtu 0.3465

= **4.36** lb CO

**Ma terial Balance for SO2 emissions =** 

= 278.3 scf H2S lbm ol 1 379.5 scf 1

= **46.93** lb SO2

**Summary of Flare Emissions CH4 (Methane):**  **0.9 lb**  **CH2 (Ethane): 0.3**  **lb C2H4 (Ethylene):**  **0.2 lb**  **C3H8 (Propane): 0.6**  **lb C3H6 (Propylene):**  **0.4 lb**  **I-C4 (iso-Butane): 0.4**  **lb nC4 (n-Butane):**  **1.5 lb**  **C4=1 (1-Butene): 0.0**  **lb IC4= (iso-Butene):**  **0.1 lb**  **TC4= (trans-2-Butene): 0.0**  **lb CC4= (cis-2-Butene):**  **0.0 lb**  **C4== (1,3-Butadiene):**

**- lb**  **IC5 (iso-Pentane): 4.4**  **lb NC5 (n-Pentane):**  **0.5 lb**  **C6+ (Hexane plus) 0.8**  **lb**

**Benzene: 0.0**  **lb  ** SO2 :** **46.9 lb**  **NOx : 0.9**  **lb CO :**  **4.4 lb**  **H 2**  **S: 0.5**  **lb**Destruction efficiencies and flare factors are from the "July 1996 TNRCC Technical Guidance Package for Flare Sources" Assume C6+ compounds are **3.3** % benzene, if no benzene sample data available.

### Calculation of Flare Emissions: West Plant

Date of Report 7/10/2009 0:00 Report Author S. Peters 

### Time set up earlier: **0 min**  **Time interval: 1**  **min Time prolong:**  **0 min** 
**Plant Site:** 

### West **Steam / A ir:**  **STEA M** 

**Component HHV**  **lb (Btu/SCF)**  **MMBtu** 24.57 325 1.50 291.48 0 0.00 0.00 0 0.00 0.00 321 0.00 0.87 0 0.00 25.50 646 0.18 44.53 1012 1.07 10.34 1773 0.25 13.76 1773 0.31 30.59 2524 0.66 19.46 2524 0.44 21.01 3261 0.45 2.89 3261 0.06 1.81 3271 0.04 0.00 3271 0.00 75.90 3271 1.62 2.17 3271 0.05 1.74 3271 0.04 218.35 4011 4.61 23.25 4020 0.49 39.45 4768 0.83 0.00 3752

- 848 984 13 **446.96 lb**  **Overall HHV: 984.40**  **Btu/SCF**

lb VOC to flare

58.33333333 lb VOC to atmosphere from flare

lb H2S to atmosphere from flareCO

(lb/MMBtu) 0.3503 0.3465 0.2755 0.5496

lb MMBtu

lb MMBtu

lbm ol SO2 64 lb SO2 lbm ol H2S lbm ol

**Reportable Quantity Green house effect**  **Green house effect** 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 10 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 10 lb per 24 hrs 500 lb per 24 hrs 200 lb per 24 hrs(TCEQ) 1000 lb per 24 hrs(TCEQ) 5,000 lb per 24 hrs 100 lb per 24 hrsDestruction efficiencies and flare factors are from the "July 1996 TNRCC Technical Guidance Package for Flare Sources"38FCD is the daily sample from FGRU compressor dicharge KO drum. 43FSF is the special sample from 1st stage flare KO drum.

**Please use WinBLSS - Get Stream Data Search function to check up the proper** 

### Lab sampling results
Sam pling date: **Sample choice as:** 4 **701FCD Worst Case Senerio**  **is used.** RESULTS GRVCSP: Spc Grv Gas Air = 1.0 NBTU: NET BTU REAL GAS @60F **NBTU: NET BTU REA L GA** **S @60F 624.7**  MW CAL: Molecular W eight #H2:Hydrogen,mol% 38.035 #H2:Hydrogen,mol% #N2: Nitrogen 32.546 #N2: Nitrogen #O2: Oxygen 0 #CO: Carbon Monoxide 0 #CO: Carbon Monoxide #CO2: Carbon diOxide 0.062 #CO2: Carbon diOxide **#H2S: Hydrogen Sulfi** 2.34 #H2S: Hydrogen Sulfide #C1: Methane 8.683 #C1: Methane #C2L:Ethane and Ligh 11.266 #C2L:Ethane and Lighter,mol% #C2=: Ethylene 1.152 #C2=: Ethylene #C2: Ethane 1.431 #C2: Ethane #C3: Propane 2.169 #C3: Propane #C3=: Propylene 1.446 #C3=: Propy lene #IC4: iso-Butane 1.13 #IC4: iso-Butane #IC4=: iso-Butene 0.161 #IC4=: iso-Butene #C4=1: 1-Butene 0.101 #C4=1: 1-Butene #C4==: 1,3-Butadiene 0 #C4==: 1,3-Butadiene #NC4: n-Butane 4.083 #NC4: n-Butane #TC4=: trans-2-Buten 0.121 #TC4=: trans-2-Butene Worst Case

#CC4=: cis-2-Butene 0.097 #CC4=: cis-2-Butene #C4+: Butane Plus 0.48 #C4+: Butane Plus #IC5: iso-Pentane 9.465 #IC5: iso-Pentane #NC5: n-Pentane 1.008 #NC5: n-Pentane #C5+: Pentane plus 0.655 #C5+: Pentane plus #C6+: Hexane plus 1.432 #C6+: Hexane plus #C4=: Butenes 0 #C4=: Butenes Benzene 0 @BZ:Benzene,ppm 105.462 Worst Case38FCD is the daily sample from FGRU compressor dicharge KO drum. Sam ple search back to 6/26/2009 6:15 43FSF is the special sample from 1st stage flare KO drum.

**Please use WinBLSS - Get Stream Data Search function to check up the proper "Sample Date"**  **to be used.**
0 Default
**6/29/2009 5:00:00 A M**  Sam pling date: **7/4/2009 5:00:00 A M**  701FCD
**710FCD** 710FCD VALUE UOM RESULTS VALUE Wo rst Case 0.4962 GRVCSP: Spc Grv Gas Air = 1.0 0.5163 783 NBTU: NET BTU REAL GAS @60F 604 14.2 MW CAL: Molecular W eight 14.9 69.14 mo l% #H2:Hydrogen,mol% 52.88 5.31 mo l% #N2: Nitrogen 18.61 783 2.2 0 mo l% #CO: Carbon Monoxide 0.11 0.06 mo l% #CO2: Carbon diOxide 0.2 0.04 mo l% #H2S: Hydrogen Sulfide 0 7.58 mo l% #C1: Methane 16.29 9.87 mo l% #C2L:Ethane and Lighter,mol% 21.15 0.36 mo l% #C2=: Ethylene 2.07 1.93 mo l% #C2: Ethane 2.79 3.16 mo l% #C3: Propane 0.9 0.77 mo l% #C3=: Propy lene 1.69 4.1 mo l% #IC4: iso-Butane 0.31 0.14 mo l% #IC4=: iso-Butene 0.14 0.1 mo l% #C4=1: 1-Butene 0.1 0 mo l% #C4==: 1,3-Butadiene 0 3.4 mo l% #NC4: n-Butane 0.33 0.11 mo l% #TC4=: trans-2-Butene 0.12 0.09 mo l% #CC4=: cis-2-Butene 0.11 11.58 mo l% #C4+: Butane Plus 4.44 0.57 mo l% #IC5: iso-Pentane 0.52 0.6 mo l% #NC5: n-Pentane 0.61 NR mo l% #NC5: n-Pentane NR

2.47 mo l% #C6+: Hexane plus 2.2 0.44 mo l% #C4=: Butenes 0.47 NR ppm v @BZ:Benzene,ppm NR ppm v710FCD:Flare Gas 701FCD:E. plant Flar

**Worst Case Senerio** VALUE GRVCSP: Spc Grv Gas Air = 1.0 0.74022 NBTU: NET BTU REAL GAS @60F 624.7 MW CAL: Molecular W eight 21.26 #H2:Hydrogen,mol% 38.035 #N2: Nitrogen 32.546

#CO: Carbon Monoxide 0 #CO2: Carbon diOxide 0.062 #H2S: Hydrogen Sulfide 2.34 12/14/07 through 12/26/07/2003 11:58:00 PM 701FCD:E. plant Flar #C1: Methane 8.683 #C2L:Ethane and Lighter,mol% 11.266 #C2=: Ethylene 1.152 #C2: Ethane 1.431 #C3: Propane 2.169 #C3=: Propylene 1.446 #IC4: iso-Butane 1.13 #IC4=: iso-Butene 0.161 #C4=1: 1-Butene 0.101 #C4==: 1,3-Butadiene 0 #NC4: n-Butane 4.083 #TC4=: trans-2-Butene 0.121 #CC4=: cis-2-Butene 0.097 #C4=: Butenes 0.48 #C4+: Butane Plus 9.465 #IC5: iso-Pentane 1.008 #NC5: n-Pentane 0.655 #C6+: Hexane plus 1.432

### Calculation of Flare Emissions: West Plant **Date and time when flaring began: Date and time when flaring ended:**  **Incident: 0**  

### Time set up earlier: **Time interval: Time prolong:** 
Volum e of Flare Piping and Equipment=

**Total Release to Flare =**

**- SCF** 

**MW Component**  **vol % SCF**  **lb-mol (lb/lb-mol)**  #H2:Hydrogen,mol% 52.88

- 0.00 2.02 #N2: Nitrogen 18.61

- 0.00 28.01 #O2: Oxygen 2.20

- 0.00 32 #CO: Carbon Monoxide 0.11

- 0.00 28.01 #CO2: Carbon diOxide 0.20

- 0.00 44.01 #H2S: Hydrogen Sulfi 0.00

- 0.00 34.08 #C1: Methane 16.29

- 0.00 16.04 #C2=: Ethylene 2.07

- 0.00 28.06 #C2: Ethane 2.79

- 0.00 30.08 #C3: Propane 0.90

- 0.00 44.11 #C3=: Propylene 1.69

- 0.00 42.09 #IC4: iso-Butane 0.31

- 0.00 58.14 #IC4=: iso-Butene 0.14

- 0.00 56.12 #C4=1: 1-Butene 0.10

- 0.00 56.12 #C4==: 1,3-Butadiene 0.00

- 0.00 54.09 #NC4: n-Butane 0.33

- 0.00 58.14 #TC4=: trans-2-Buten 0.12

- 0.00 56.1 7/3/2009 0:00 7/3/2009 6:15

#TC4=: trans-2-Buten 0.12

- 0.00 56.1 #CC4=: cis-2-Butene 0.11

- 0.00 56.1 #IC5: iso-Pentane 0.52

- 0.00 72.15 #NC5: n-Pentane 0.61

- 0.00 72.15 #C6+: Hexane plus 2.20

- 0.00 86.17 Benzene 0.00

- - 78.11 Total **102.18** 0 15.592 **Total VOC (C3+) =**

**VOC emissions from flare, assuming 98**  % destruction efficiency*:

= 0.02 0 lb VOC to flare

= **0.00** lb VOC to atmosphere from flare

**H2S emissions from flare, assuming 98**  % destruction efficiency*:

= 0.02 0 lb H2S to flare

= **0.00** lb H2S to atmosphere from flare**Combustion emissions:**

TNRCC Flare Emission Factors* NOx (lb/MMBtu) Steam -assisted: High Btu (>1000 Btu/scf) 0.0485 Low Btu (192-1000 Btu/scf) 0.068 Air-assisted: High Btu (>1000 Btu/scf) 0.138 Low Btu (192-1000 Btu/scf) 0.0641

Flare emission factors: NOx = 0.0680 lb/MMBtu CO = 0.3465 lb/MMBtu

Using emission factors,

Am bient NOx emissions = 0 MMBtu 0.068

= **0.00** lb NOx

CO emissions = 0 MMBtu 0.3465

= **0.00** lb CO

**Ma terial Balance for SO2 emissions =** 

= 0.0 scf H2S lbm ol 1 379.5 scf 1

= **0.00** lb SO2

**Summary of Flare Emissions CH4 (Methane):** 

**- lb**  **CH2 (Ethane):**

**- lb**  **C2H4 (Ethylene):**

**- lb**  **C3H8 (Propane):**

**- lb**  **C3H6 (Propylene):**

**- lb**  **I-C4 (iso-Butane):**

**- lb**  **nC4 (n-Butane):**

**- lb**  **C4=1 (1-Butene):**

**- lb**  **IC4= (iso-Butene):**

**- lb**  **TC4= (trans-2-Butene):**

**- lb**  **CC4= (cis-2-Butene):**

**- lb**  **C4== (1,3-Butadiene):**

**- lb**  **IC5 (iso-Pentane):**

**- lb**  **NC5 (n-Pentane):**

**- lb**  **C6+ (Hexane plus)**

**- lb** 

**Benzene:**

**- lb** ** **SO2 :**

**- lb**  **NOx :**

**- lb**  **CO :**

**- lb**  **H 2**  **S:**

**- lb** Destruction efficiencies and flare factors are from the "July 1996 TNRCC Technical Guidance Package for Flare Sources" Assume C6+ compounds are **3.3** % benzene, if no benzene sample data available.

### Calculation of Flare Emissions: West Plant

Date of Report 7/10/2009 0:00 Report Author S. Peters 

### Time set up earlier: **0 min**  **Time interval: 1**  **min Time prolong:**  **0 min** 
**Plant Site:** 

### West **Steam / A ir:**  **STEA M** 

**Component HHV**  **lb (Btu/SCF)**  **MMBtu** 0.00 325 0.00 0.00 0 0.00 0.00 0 0.00 0.00 321 0.00 0.00 0 0.00 0.00 646 0.00 0.00 1012 0.00 0.00 1773 0.00 0.00 1773 0.00 0.00 2524 0.00 0.00 2524 0.00 0.00 3261 0.00 0.00 3261 0.00 0.00 3271 0.00 0.00 3271 0.00 0.00 3271 0.00 0.00 3271 0.00 0.00 3271 0.00 0.00 4011 0.00 0.00 4020 0.00 0.00 4768 0.00 0.00 3752

-

- #DIV/0! 0 **0.00 lb**  **Overall HHV: #DIV/0!**  **Btu/SCF**

lb VOC to flare

58.33333333 lb VOC to atmosphere from flare

lb H2S to atmosphere from flareCO

(lb/MMBtu) 0.3503 0.3465 0.2755 0.5496

lb MMBtu

lb MMBtu

lbm ol SO2 64 lb SO2 lbm ol H2S lbm ol

**Reportable Quantity Green house effect**  **Green house effect** 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 10 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 5,000 lb per 24 hrs 10 lb per 24 hrs 500 lb per 24 hrs 200 lb per 24 hrs(TCEQ) 1000 lb per 24 hrs(TCEQ) 5,000 lb per 24 hrs 100 lb per 24 hrsDestruction efficiencies and flare factors are from the "July 1996 TNRCC Technical Guidance Package for Flare Sources"38FCD is the daily sample from FGRU compressor dicharge KO drum. 43FSF is the special sample from 1st stage flare KO drum.

**Please use WinBLSS - Get Stream Data Search function to check up the proper** 

### Lab sampling results
Sam pling date: **Sample choice as:** 3 **710FSF**

**710FCD is used.**  RESULTS GRVCSP: Spc Grv Gas Air = 1.0 NBTU: NET BTU REAL GAS @60F **NBTU: NET BTU REA L GA** **S @60F 604**  MW CAL: Molecular W eight #H2:Hydrogen,mol% 52.88 #H2:Hydrogen,mol% #N2: Nitrogen 18.61 #N2: Nitrogen #O2: Oxygen 2.2 #CO: Carbon Monoxide 0.11 #CO: Carbon Monoxide #CO2: Carbon diOxide 0.2 #CO2: Carbon diOxide **#H2S: Hydrogen Sulfi** 0 #H2S: Hydrogen Sulfide #C1: Methane 16.29 #C1: Methane #C2L:Ethane and Ligh 21.15 #C2L:Ethane and Lighter,mol% #C2=: Ethylene 2.07 #C2=: Ethylene #C2: Ethane 2.79 #C2: Ethane #C3: Propane 0.9 #C3: Propane #C3=: Propylene 1.69 #C3=: Propy lene #IC4: iso-Butane 0.31 #IC4: iso-Butane #IC4=: iso-Butene 0.14 #IC4=: iso-Butene #C4=1: 1-Butene 0.1 #C4=1: 1-Butene #C4==: 1,3-Butadiene 0 #C4==: 1,3-Butadiene #NC4: n-Butane 0.33 #NC4: n-Butane #TC4=: trans-2-Buten 0.12 #TC4=: trans-2-Butene **Warning! H2S Concentration shown as 0. Check sample data!** 

**Warning! 710FCD H2S Concentration maybe not normal. Check sample data!**  701FCD 10

#TC4=: trans-2-Buten 0.12 #TC4=: trans-2-Butene #CC4=: cis-2-Butene 0.11 #CC4=: cis-2-Butene #C4+: Butane Plus 4.44 #C4+: Butane Plus #IC5: iso-Pentane 0.52 #IC5: iso-Pentane #NC5: n-Pentane 0.61 #NC5: n-Pentane #C5+: Pentane plus 0 #C5+: Pentane plus #C6+: Hexane plus 2.2 #C6+: Hexane plus #C4=: Butenes 0.47 #C4=: Butenes Benzene 0 @BZ:Benzene,ppm 102.65 701FCD 1038FCD is the daily sample from FGRU compressor dicharge KO drum. Sam ple search back to 6/26/2009 6:15 43FSF is the special sample from 1st stage flare KO drum.

**Please use WinBLSS - Get Stream Data Search function to check up the proper "Sample Date"**  **to be used.**
0 Default
**NR** Sam pling date: **7/4/2009 5:00:00 A M**  701FCD
**710FCD** 710FCD VALUE UOM RESULTS VALUE Wo rst Case NR GRVCSP: Spc Grv Gas Air = 1.0 0.5163 NR NBTU: NET BTU REAL GAS @60F 604 NR MW CAL: Molecular W eight 14.9 NR mo l% #H2:Hydrogen,mol% 52.88 NR mo l% #N2: Nitrogen 18.61 NR 2.2 NR mo l% #CO: Carbon Monoxide 0.11 NR mo l% #CO2: Carbon diOxide 0.2 NR mo l% #H2S: Hydrogen Sulfide 0 NR mo l% #C1: Methane 16.29 NR mo l% #C2L:Ethane and Lighter,mol% 21.15 NR mo l% #C2=: Ethylene 2.07 NR mo l% #C2: Ethane 2.79 NR mo l% #C3: Propane 0.9 NR mo l% #C3=: Propy lene 1.69 NR mo l% #IC4: iso-Butane 0.31 NR mo l% #IC4=: iso-Butene 0.14 NR mo l% #C4=1: 1-Butene 0.1 NR mo l% #C4==: 1,3-Butadiene 0 NR mo l% #NC4: n-Butane 0.33 NR mo l% #TC4=: trans-2-Butene 0.12 NR mo l% #CC4=: cis-2-Butene 0.11 NR mo l% #C4+: Butane Plus 4.44 NR mo l% #IC5: iso-Pentane 0.52 NR mo l% #NC5: n-Pentane 0.61 NR mo l% #NC5: n-Pentane NR NR mo l% #C6+: Hexane plus 2.2 NR mo l% #C4=: Butenes 0.47 NR ppm v @BZ:Benzene,ppm NR ppm v710FCD:Flare Gas
710FSF:Flare Gas

**Worst Case Senerio** VALUE GRVCSP: Spc Grv Gas Air = 1.0 0.74022 NBTU: NET BTU REAL GAS @60F 624.7 MW CAL: Molecular W eight 21.26 #H2:Hydrogen,mol% 38.035 #N2: Nitrogen 32.546

#CO: Carbon Monoxide 0 #CO2: Carbon diOxide 0.062 #H2S: Hydrogen Sulfide 2.34 12/14/07 through 12/26/07/2003 11:58:00 PM 701FCD:E. plant Flar #C1: Methane 8.683 #C2L:Ethane and Lighter,mol% 11.266 #C2=: Ethylene 1.152 #C2: Ethane 1.431 #C3: Propane 2.169 #C3=: Propylene 1.446 #IC4: iso-Butane 1.13 #IC4=: iso-Butene 0.161 #C4=1: 1-Butene 0.101 #C4==: 1,3-Butadiene 0 #NC4: n-Butane 4.083 #TC4=: trans-2-Butene 0.121 #CC4=: cis-2-Butene 0.097 #C4=: Butenes 0.48 #C4+: Butane Plus 9.465 #IC5: iso-Pentane 1.008 #NC5: n-Pentane 0.655 #C6+: Hexane plus 1.432Sam ple ID 1700893 1700444 1699258 1698394

Sam ple Date 12/26/2007 5:00 12/25/2007 5:00 12/22/2007 5:00 12/20/2007 5:00 Code 701FCD:E. plant Flar 701FCD:E. plant Flar 701FCD:E. plant Flar 701FCD:E. plant Flar Comment NBTU: NET BTU REAL GAS @60F 1496 1399 115 588 GRVCSP: Spc Grv Gas Air = 1.0 1.1028 1.0449 0.985 0.6229 MW CAL: Molecular W eight 31.3 29.7 28.6 17.9 #H2:Hydrogen,mol% 32.08 32.43 2 36.09 #N2: Nitrogen 14.19 15.06 73.62 26.7 #O2: Oxygen 0 0 18.03 1.97 #CO: Carbon Monoxide 0 0 0 0 #CO2: Carbon diOxide 0.11 0.11 0.05 0.14 #H2S: Hydrogen Sulfide 0.27 0.29 0 0.41 #C1: Methane 11.12 11.78 3.48 24.06 #C2L:Ethane and Lighter,mol% 13.46 14.19 3.82 28.09 #C2=: Ethylene 0.95 1 0.14 1.71 #C2: Ethane 1.39 1.41 0.2 2.32 #C3: Propane 7.58 7.51 0.78 1.14 #C3=: Propylene 1.91 1.86 0.13 1.3 #IC4: iso-Butane 3.43 3.37 0.23 0.75 #IC4=: iso-Butene 0.23 0.24 0 0.11 #C4=1: 1-Butene 0.13 0.13 0 0.08 #C4==: 1,3-Butadiene 0 0 0 0 #NC4: n-Butane 16.18 18.36 0.99 0.97 #TC4=: trans-2-Butene 0.16 0.16 0 0.09 #CC4=: cis-2-Butene 0.13 0.12 0 0.08 #C4=: Butenes 0.65 0.65 0 0.36 #C4+: Butane Plus 26.52 26.05 1.42 3.05 #IC5: iso-Pentane 1.98 1.7 0.15 0.94 #NC5: n-Pentane 2.17 1.09 0 0.59 #C6+: Hexane plus 5.99 3.38 0.2 0.561697835 1697358 1696864 1696530

12/19/2007 5:00 12/18/2007 5:00 12/17/2007 5:00 12/16/2007 5:00 701FCD:E. plant Flar 701FCD:E. plant Flar 701FCD:E. plant Flar 701FCD:E. plant Flar

804 542 363 380 0.5697 0.621 0.6693 0.6471 16.2 17.8 19.4 18.7 57.5 47.76 38.66 41.13 10.43 29.1 41.07 37.62 0 2.75 0.74 0.01 0 0 0 0 0.07 0.11 0.01 0 0.66 0.6 8.8 10.26 12.83 7.68 4.27 4.45 17.06 10.4 6.81 7.08 2.37 1.46 0.66 0.69 1.86 1.26 1.88 1.94 1.1 1.13 0.76 0.76 3.33 1.66 0.71 0.74 1.19 1.01 0.46 0.47 0.47 0.16 0.07 0.07 0.32 0.1 0.04 0.04 0 0 0 0 1.48 1.71 0.45 0.47 0.39 0.12 0.04 0.04 0.3 0.1 0.04 0.04 1.48 0.48 0.19 0.19 6.38 4.61 10.67 12.04 2.73 1.6 0.36 0.37 1.39 0.87 0.21 0.23 1.57 0.81 0.77 0.651696190 1695775

12/15/2007 5:00 12/14/2007 5:00 701FCD:E. plant Flar 701FCD:E. plant Flar

149 411 624.7 0.6999 0.4396 0.74022 20.3 12.7 21.26 31.42 61.28 38.035 54.16 23.51 32.546 9.95 0 3.345 0 0 0 0.01 0.01 0.062 0.53 1.58 2.34 1.69 5.47 8.683 2.93 8.82 11.266 0.69 1.85 1.152 0.55 1.5 1.431 0.18 0.75 2.169 0.62 2.2 1.446 0.06 0.33 1.13 0.03 0.23 0.161 0.01 0.16 0.101 0 0 0 0.04 0.18 4.083 0.02 0.19 0.121 0.01 0.15 0.097 0.07 0.73 0.48 0.72 3.19 9.465 0 0.25 1.008 0 0 0.655 0.02 0.37 1.432E10FI9239.PV

MMSCFD 300.7861

349.6042 354.8277 280.9392 293.6151 284.4338 287.0501 196.0526 0.42938 298.1807 429380.2 0.43825 304.3405 438250.3 0.438279 304.3602 438278.7 0.436191 302.9102 436190.6 0.430735 299.1214 430734.8 0.428181 297.3481 428181.2 0.420781 292.2088 420780.7 0.433015 300.7048 433015 0.437055 303.5102 437054.7 0.432195 300.1357 432195.4 0.451331 313.424 451330.6 434126.6Sam ple ID 1711917 1711566 1711240 1710807

Sam ple Date 1/21/2008 5:00 1/20/2008 5:00 1/19/2008 5:00 1/18/2008 5:00 Code 710FCD:Flare Gas 710FCD:Flare Gas 710FCD:Flare Gas 710FCD:Flare Gas Comment NBTU: NET BTU REAL GAS @60F 734 856 620 652 GRVCSP: Spc Grv Gas Air = 1.0 0.518 0.5988 0.4462 0.4717 MW CAL: Molecular W eight 14.8 17.1 12.9 13.5 #H2:Hydrogen,mol% 59.55 54.97 61.09 60.13 #N2: Nitrogen 10.48 9.47 11.33 11.69 #O2: Oxygen 0 0.02 0.03 0.02 #CO: Carbon Monoxide 0.12 0.13 0.18 0.13 #CO2: Carbon diOxide 0.05 0.16 0.08 0.05 #H2S: Hydrogen Sulfide 0.23 0.23 0.02 0 #C1: Methane 14.59 14.7 17.39 15.75 #C2L:Ethane and Lighter,mol% 17.45 17.91 20.06 18.99 #C2=: Ethylene 1.02 1.02 1.12 1.25 #C2: Ethane 1.84 2.19 1.55 1.99 #C3: Propane 1.65 4.5 0.71 0.94 #C3=: Propylene 1.93 1.83 1.44 2.13 #IC4: iso-Butane 1.11 2.26 0.23 0 #IC4=: iso-Butene 0.17 0.18 0.11 0.19 #C4=1: 1-Butene 0.1 0.1 0.07 0.11 #C4==: 1,3-Butadiene 0 0 0 0 #NC4: n-Butane 2.34 3.71 0.25 0.39 #TC4=: trans-2-Butene 0.11 0.12 0.05 0.11 #CC4=: cis-2-Butene 0.09 0.09 0.04 0.09 #C4=: Butenes 0.47 0.49 0.27 0.5 #C4+: Butane Plus 5.6 8.13 2.91 3.04 #IC5: iso-Pentane 1.73 1.54 1 1.42 #NC5: n-Pentane 1.44 1.34 1.19 1.45 #C6+: Hexane plus 1.45 1.44 2.14 1.62

Sam ple ID 1708364 1704508 1704117 1703593 Sam ple Date 1/12/2008 18:00 1/3/2008 12:00 1/2/2008 12:00 1/1/2008 12:00 Code 710FSF:Flare Gas 710FSF:Flare Gas 710FSF:Flare Gas 710FSF:Flare Gas Comment NBTU: NET BTU REAL GAS @60F 803 GRVCSP: Spc Grv Gas Air = 1.0 0.5952 NoSm ple No Smple No Smple MW CAL: Molecular W eight 17 Pending H2SDRE:H2SPPM < 1 #H2:Hydrogen,mol% 53.31 Pending #N2: Nitrogen 12.89 Pending #O2: Oxygen 0.03 Pending #CO: Carbon Monoxide 0.13 Pending #CO2: Carbon diOxide 0.11 Pending #H2S: Hydrogen Sulfide 0 Pending #C1: Methane 16.19 Pending #C2L:Ethane and Lighter,mol% 18.94 Pending #C2=: Ethylene 1.15 Pending #C2: Ethane 1.6 Pending#C3: Propane 3.8 Pending

#C3=: Propylene 1.9 Pending #IC4: iso-Butane 0.62 Pending #IC4=: iso-Butene 0.17 Pending #C4=1: 1-Butene 0.1 Pending #C4==: 1,3-Butadiene 0 Pending #NC4: n-Butane 1.75 Pending #TC4=: trans-2-Butene 0.1 Pending #CC4=: cis-2-Butene 0.09 Pending #C4=: Butenes 0.46 Pending #C4+: Butane Plus 5.47 Pending #IC5: iso-Pentane 1.57 Pending #NC5: n-Pentane 1.83 Pending #C6+: Hexane plus 2.64 Pending1710357 Sam ple ID 1712800

1/17/2008 5:00 Sam ple Date 1/22/2008 710FCD:Flare Gas Code 701FCD:E. plant Flar Comment SPECIAL Pending NBTU: NET BTU REAL GAS @60F 115 Pending GRVCSP: Spc Grv Gas Air = 1.0 0.904 Pending MW CAL: Molecular W eight 26.2 43.66 #H2:Hydrogen,mol% 11.38 10.79 #N2: Nitrogen 68.31 0.03 #O2: Oxygen 16.29 0.15 #CO: Carbon Monoxide 0 0 #CO2: Carbon diOxide 0.03 0.11 #H2S: Hydrogen Sulfide 0 17.69 #C1: Methane 1.64 21.97 #C2L:Ethane and Lighter,mol% 2.23 1.56 #C2=: Ethylene 0.16 2.72 #C2: Ethane 0.43 1.59 #C3: Propane 0.47 3.14 #C3=: Propylene 0.19 0 #IC4: iso-Butane 0.09 0.3 #IC4=: iso-Butene 0.01 0.19 #C4=1: 1-Butene 0 0 #C4==: 1,3-Butadiene 0 0.78 #NC4: n-Butane 0.13 0.21 #TC4=: trans-2-Butene 0 0.16 #CC4=: cis-2-Butene 0 0.86 #C4=: Butenes 0.01 11.51 #C4+: Butane Plus 0.85 3.27 #IC5: iso-Pentane 0.13 3.89 #NC5: n-Pentane 0.13 9.08 #C6+: Hexane plus 0.62

1703149 12/31/2007 12:00 710FSF:Flare Gas

No Smple