ENVIRON International Corp. 8235 YMCA Plaza Drive, Suite 300, Baton Rouge, LA 70810 

V +1 225.408.2696 F +1 225.408.2747 

environcorp.com 

September 17, 2013 

Electronic Delivery 

Ms. Heather M. Ceron 

USEPA Region 4 

Air Permits Section 

61 Forsyth Street SW 

Atlanta, GA 30303-8960 

Re: Additional Information – Developer Cement Unit Engines Hours of Operation 

Statoil Gulf Services, LLC 

Title V and PSD Permit Application 

OCS Drilling and Exploration Activities 

Dear Ms. Ceron:

Statoil Gulf Services, LLC (Statoil) submitted a Title V and Prevention of Significant Deterioration 

(PSD) permit application for proposed exploratory drilling in the Outer Continental Shelf (OCS) in the 

eastern Gulf of Mexico to EPA on September 5, 2012. EPA published proposed permit number 

OCS-EPA-R4012 for public review on August 9, 2013. The public comment period ended on 

September 9, 2013. On behalf of Statoil, ENVIRON International Corporation (ENVIRON) is 

submitting this letter to provide EPA with additional information to be incorporated into the permit 

prior to issuance. Specifically, Statoil requests the hours of operation be increased for the Maersk 

Developer (Developer) Cement Unit Engines 1 and 2 (CMU-1 and CMU-2) from 120 hours per year 

to 300 hours per year (combined). The proposed change results in minimal increases in annual 

emissions, and has no impact on the PSD applicability analysis, BACT analysis, or air quality 

analysis as described further herein. 

Annual Emission Impacts 

Specific Condition 6.8.2 for Cement Engines 1 and 2 (CMU-1 and CMU-2) in the proposed permit 

states “Operating Limit: These engines shall be operated no more than 60 hours per year for each 

engine on a rolling 12-month average basis.” Statoil proposes to operate these engines for a 

maximum of 300 hours per year total to meet the cementing demands during the 180-day campaign. 

Therefore, Statoil proposes Specific Condition 6.8.2 be revised to read “Operating Limit: These 

engines shall be operated no more than 300 hours per year (combined) on a rolling 12-month 

average basis.” The emission calculations have been updated to account for this increase in hours 

of operation and are included as Attachment A. Table 1 below shows the potential to emit emissions 

included in the proposed permit compared to the revised emission totals for the Developer (Operating 

Scenario 1) along with the resulting change in emission rates in tons per year (tpy). 

 
Ms. Heather M. Ceron - 2 - September 17, 2013 

Table 1 

Developer (Scenario 1) Potential to Emit Comparison 

Emissions VOC NOX CO SO2 PM PM10 PM2.5 CO2e Lead 

Previous 

Proposed 

Totals 

27.65 484.26 63.32 0.37 10.64 9.82 9.52 39,333.51 6.99E-3 

Revised 

Emission 

Totals 

27.76 484.80 63.69 0.37 10.65 9.84 9.53 39,385.04 7.00E-3 

Change in 

Emissions +0.11 +0.54 +0.37 -- +0.01 +0.02 +0.01 +51.53 +1.00E-5 

As documented in Table 1, the emission increases associated with the additional hours of operation 

for the cementing unit engines is minimal. Furthermore, the proposed change in hours of operation 

has no impacts to the regulatory applicability analysis previously conducted for these engines or any 

other emission sources proposed with the Statoil OCS exploration activities. 

PSD Significance Analysis Impacts 

ENVIRON has updated the potential to emit for Scenario 1 (Developer) to reflect the updated Cement 

Unit Engines 1 and 2 emissions as a result of the proposed increase in annual hours of operation. 

The revised emission totals for Scenario 1 are presented below in Table 2. As shown, the minor 

increase in annual emission rates does not change the pollutants subject to PSD review. Both 

operating scenarios are still subject to PSD for NOX emissions only. 

Table 2 

Potential to Emit for Regulated NSR Pollutants 

Pollutant 

Scenario 1 

(Developer) PTE 

(TPY) 

Scenario 2 

(Discoverer 

Americas) PTE 

(TPY) 

Significance Emission 

Rate (TPY) PSD Review Required 

CO 63.69 60.08 100 No 

NOX 484.80 559.72 40 Yes 

VOC 27.76 24.82 40 No 

PM 10.65 10.16 25 No 

PM10 9.84 9.39 15 No 

PM2.5 9.53 9.14 10 No 

SO2 0.37 0.32 40 No 

CO2e 39,385.04 34,077.77 75,000 (subject to 

regulation threshold) No 

 
Ms. Heather M. Ceron - 3 - September 17, 2013 

BACT Impacts 

NOX BACT for the cementing unit engines was determined to be use of engines with low NOX engine 

design, including turbocharger, aftercooler, and electronic fuel injection along with good combustion 

practices and enhanced work practice standards. The proposed increase in hours of operation has 

no impact on the previous NOX BACT determination. 

Air Quality Analysis Impacts

As noted previously, the increase in hours of operation for the Cement Unit Engines 1 and 2 result in 

minor increases in the potential to emit emissions from Scenario 1 (Developer). It should be noted 

the change in emissions only impacts annual tpy emissions; no change in short-term pound per hour 

(lb/hr) emissions is proposed. Therefore, regarding the air quality analysis, the modeled 

concentrations for the NO2 1-hr and PM2.5 24-hr averaging periods are unchanged. Furthermore, 

changes to the predicted concentrations for the annual averaging periods for NO2 and PM2.5 are 

expected to be minimal due to the minor (0.1 percent) changes in annual emissions, and would have 

no impact on the overall results of the air quality analysis. Tables 6.3.1-1 and 6.4.11-1 presented 

below are the results of the Class II and Class I revised air quality analysis provided to EPA in 

additional information dated June 2013 and July 12, 2013. 

Table 6.3.1-1 (from July 12, 2013 submittal to EPA) 

Maximum CALPUFF-Predicted Class II Concentrations 

Criteria 

Pollutant 

Averaging 

Period 

Developer 

Max. 

Concentration

(μg/m3)

Discoverer 

Americas Max. 

Concentration

(μg/m3)

Modeling 

Significance 

Level 

(μg/m3) 

Monitoring 

DeMinimus 

Concentration 

(μg/m3) 

NO2 a Annual 0.22 0.28 1.0 14 

PM2.5 Annual 0.0061 0.0069 0.3 None 

Notes:

a

 Annual NOX was assumed to be 75 percent converted to NO2. 

Table 6.4.11-1 (from June 2013 submittal to EPA) 

Maximum Predicted Class I Concentrations 

Criteria Pollutant Averaging Period 

Developer 

Max. 

Concentration 

(μg/m3)

Discoverer 

Americas 

 Max. 

Concentration

(μg/m3)

EPA SIL 

(μg/m3) 

FLM SIL

 (μg/m3) 

NO2 a Annual 0.02 0.02 0.1 0.03 

PM2.5 b Annual 0.0004 0.0004 0.06 -- 

Notes: 

a

 NOX was conservatively assumed to be 75 percent converted to NO2.

b 100th percentile (maximum) values are presented (not 98th percentile) using direct PM2.5 emissions only.

As shown in the tables above, the Class II and Class I predicted concentrations for NO2 and PM2.5 for 

the annual averaging periods are well below the relevant Class II and Class I Significant Impact 
Ms. Heather M. Ceron - 4 - September 17, 2013 

Levels (SIL). The minor increase in emissions associated with the proposed increase in hours of 

operation of the cement unit engines would not result in predicted concentrations above an 

applicable SIL. Therefore, Statoil concludes no additional modeling is required for the small increase 

in potential annual NOX and PM2.5 emissions proposed herein. 

The estimated impacts of Statoil’s proposed exploration activities on the nearest PSD Class I area 

(i.e. Breton National Wildlife Refuge) shows visibility impacts just greater than the FLM target value 

for the Operating Scenario 2, or the Discoverer Americas drilling vessel and associated support fleet. 

Both drilling vessels’ deposition levels are less than the FLM’s target or threshold values. As 

documented in EPA’s Preliminary Determination & Statement of Basis supporting the proposed 

Statoil permit, the Breton NWR FLM reviewed the PSD Class I area impact assessment and 

indicated that because of the conservative assumptions contained in the emissions estimates and 

analyses, and the temporary nature of the proposed exploration activities, they expected no 

significant project-related impacts. The proposed increase in annual cement unit hours of operation 

for the Developer will result in no change to the predicted visibility impacts because the visibility 

impacts are based on short-term emissions from the drilling vessels and support vessels. 

Furthermore, Statoil believes the minimal increase in NOX emissions (0.01 percent) would have no 

impact to annual nitrogen deposition predictions, and there are expected to be no significant projectrelated impacts as previously concluded by the FLM. 

Should you have further questions or need additional information, please feel free to contact me at 

(225) 408-2691 or via email at mcarbon@environcorp.com. 

Sincerely, 

Michael Carbon 

Principal, Air Sciences 

Enclosure 

cc: Don Evans, Statoil 

 Kjersti Seim, Statoil 

 Ms. Jill Webster 

 UNITED STATES DEPARTMENT OF THE INTERIOR 

 U.S. Fish and Wildlife Service 

 National Wildlife Refuge System 

 Branch of Air Quality 

 7333 W. Jefferson Ave., Suite 375 

 Lakewood, CO 80235-2017 
Attachment A 

Updated Emission Calculations 
Statoil

Eastern GOM OCS Air Permitting Project

Maersk Developer Emission Calculations

Annual Emissions SummaryCriteria Air Pollutants & Greenhouse Gas (CO2e) Emissions

Emissions Total VOC NOx CO SO2 PM PM10 PM2.5 CO2e Lead TRS

Unit ID (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr)

Wartsila Diesel Generator Engines GEN 18.23 346.90 16.58 0.28 6.38 6.38 6.38 29,613.84 5.25E-03 6.60E-03Emergency Diesel Generator Engine E-GEN 3.55E-02 0.76 0.28 5.47E-04 2.46E-02 2.02E-02 1.96E-02 57.63 1.02E-05 1.28E-05Lifeboat Engines LB 1.750E-03 8.582E-03 6.293E-03 7.566E-06 6.865E-04 5.644E-04 5.476E-04 0.80 1.41E-07 1.78E-07Fast Rescue Boat Engines MOB 0.00 0.01 0.01 1.06E-05 6.43E-04 5.29E-04 5.13E-04 1.12 1.99E-07 2.49E-07Cement Unit Engines CMU 0.19 0.89 0.62 8.15E-04 0.025 0.020 0.020 85.89 1.52E-05 1.91E-05Offshore Support Vessels OSV 4.29 108.99 33.46 0.07 2.97 2.44 2.37 6,966.08 1.23E-03 1.55E-03Crewboats CREW 1.76 27.24 12.75 0.03 0.77 0.63 0.61 2,635.57 4.67E-04 5.87E-04Cement Unit SS Holding Tank FO CMV ST 4.27E-04 -- -- -- -- -- -- -- -- --Fast Boat Tank FO MOB ST 5.34E-06 -- -- -- -- -- -- -- -- --Fuel Oil Day Tanks FO SER ST 1.96E-02 -- -- -- -- -- -- -- -- --Fuel Oil Settling Tanks FO SET ST 1.51E-02 -- -- -- -- -- -- -- -- --Fuel Oil Storage Tanks FO ST 1.51E-01 -- -- -- -- -- -- -- -- --Life Boat Tank FO LB ST 1.69E-05 -- -- -- -- -- -- -- -- --Emer. Gen. Fuel Oil Tank FO E GEN ST 2.76E-04 -- -- -- -- -- -- -- -- --Aviation Tanks AV ST 2.12E-01 -- -- -- -- -- -- -- -- --Waste Oil Tanks WO ST 2.01E-03 -- -- -- -- -- -- -- -- --Fugitives FUG 0.84 -- -- -- -- -- -- -- -- --Mud Degassing MUD 0.48 -- -- -- -- -- -- 24.11 -- --Painting PAINT 1.54 -- -- -- 0.48 0.33 0.12 -- -- --Welding WELD -- -- -- -- 0.01 0.01 0.01 -- 1.95E-05 --TOTAL 27.76 484.80 63.69 0.37 10.65 9.84 9.53 39,385.04 7.00E-03 8.77E-03Hazardous Air Pollutants (HAPs) Emissions

Emissions Benzene Toluene Xylenes Formaldehyde Acetaldehyde Acrolein Naphthalene 1,3-Butadiene 1,2,4- Trimethylbenzene Ethylbenzene Hexane (-n) PAH bis(2- ethylhexyl) phthalate 2

Unit ID (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) (ton/yr) 

Wartsila Diesel Generator Engines GEN 1.40E-01 5.09E-02 3.49E-02 1.43E-02 4.56E-03 1.43E-03 2.35E-02 -- -- -- -- -- -- Emergency Diesel Generator Engine E-GEN 2.73E-04 9.90E-05 6.80E-05 2.78E-05 8.88E-06 2.78E-06 4.58E-05 -- -- -- -- -- -- Lifeboat Engines LB 4.55E-06 1.99E-06 1.39E-06 5.75E-06 3.74E-06 4.51E-07 4.13E-07 1.90E-07 -- -- -- -- -- Fast Rescue Boat Engines MOB 6.39E-06 2.80E-06 1.95E-06 8.08E-06 5.25E-06 6.33E-07 5.81E-07 2.68E-07 -- -- -- -- -- Cement Unit Engines CMU 4.90E-04 2.15E-04 1.50E-04 6.20E-04 4.03E-04 4.86E-05 4.45E-05 2.05E-05 -- -- -- -- -- Offshore Support Vessels OSV 3.30E-02 1.20E-02 8.22E-03 3.36E-03 1.07E-03 3.36E-04 5.54E-03 0.00E+00 -- -- -- -- -- Crewboats CREW 1.26E-02 4.60E-03 3.16E-03 1.87E-03 8.06E-04 1.73E-04 2.07E-03 2.11E-05 -- -- -- -- -- Cement Unit SS Holding Tank FO CMV ST 8.40E-07 9.81E-06 2.53E-05 -- -- -- -- -- 2.07E-05 1.36E-06 1.69E-07 -- -- Fast Boat Tank FO MOB ST 1.05E-08 1.23E-07 3.17E-07 -- -- -- -- -- 2.59E-07 1.70E-08 2.12E-09 -- -- Fuel Oil Service Tanks FO SER ST 3.87E-05 4.52E-04 1.17E-03 -- -- -- -- -- 9.54E-04 6.26E-05 7.79E-06 -- -- Fuel Oil Settling Tanks FO SET ST 2.97E-05 3.48E-04 8.97E-04 -- -- -- -- -- 7.33E-04 4.81E-05 5.99E-06 -- -- Fuel Oil Storage Tanks FO ST 2.97E-04 3.48E-03 8.97E-03 -- -- -- -- -- 7.33E-03 4.81E-04 5.99E-05 -- -- Life Boat Tank FO LB ST 3.33E-08 3.89E-07 1.00E-06 -- -- -- -- -- 8.21E-07 5.39E-08 6.70E-09 -- -- Emer. Gen. Fuel Oil Tank FO E GEN ST 5.44E-07 6.36E-06 1.64E-05 -- -- -- -- -- 1.34E-05 8.80E-07 1.10E-07 -- -- Aviation Tanks AV ST 1.83E-03 1.78E-03 6.33E-04 -- -- -- -- -- -- 1.52E-04 7.36E-03 2.76E-05 -- Waste Oil Tanks WO ST 3.96E-06 4.63E-05 1.20E-04 -- -- -- -- -- 9.77E-05 6.41E-06 7.98E-07 -- -- Fugitives FUG 6.59E-06 2.63E-04 2.39E-03 -- -- -- -- -- 8.23E-03 1.07E-04 8.23E-07 -- -- Mud Degassing MUD -- -- -- -- -- -- -- -- -- -- -- -- -- Painting PAINT -- 6.40E-03 7.91E-01 -- -- -- -- -- -- 1.83E-01 -- -- 7.21E-02 Welding WELD -- -- -- -- -- -- -- -- -- -- -- -- -- TOTAL 0.189 0.081 0.852 0.020 0.007 0.002 0.031 0.00004 0.017 0.1840 0.0074 0.00003 0.07212 

Emission SourceEmission Source

Summary Page 1 of 5 
Statoil

Eastern GOM OCS Air Permitting Project

Maersk Developer Emission Calculations

Hourly Emissions SummaryCriteria Air Pollutants & Greenhouse Gas (CO2e) Emissions

Emissions Total VOC NOx CO SO2 PM PM10 PM2.5 CO2e Lead TRS

Unit ID (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr)

Wartsila Diesel Generator Engines GEN 14.07 267.67 12.79 0.22 4.92 4.92 4.92 22,850.19 4.05E-03 5.09E-03Emergency Diesel Generator Engine E-GEN 1.80 38.58 14.03 0.03 1.24 1.02 0.99 2,921.41 5.18E-04 6.51E-04Lifeboat Engines LB 0.29 1.43 1.05 0.00 0.11 0.09 0.09 132.84 2.35E-05 2.96E-05Fast Rescue Boat Engines MOB 0.41 2.01 1.34 0.00 0.11 0.09 0.09 186.67 3.31E-05 4.16E-05Cement Unit Engines CMU 2.51 11.84 8.22 0.01 0.33 0.27 0.26 1,145.20 2.03E-04 2.55E-04Offshore Support Vessels OSV 6.67 169.63 52.07 0.10 4.62 3.80 3.68 10,842.14 1.92E-03 2.41E-03Crewboats CREW 5.70 88.16 41.26 0.08 2.49 2.05 1.99 8,529.36 1.51E-03 1.90E-03Cement Unit SS Holding Tank FO CMV ST 1.97E-04 -- -- -- -- -- -- -- -- --Fast Boat Tank FO MOB ST 2.47E-06 -- -- -- -- -- -- -- -- --Fuel Oil Service Tanks FO SER ST 9.10E-03 -- -- -- -- -- -- -- -- --Fuel Oil Settling Tanks FO SET ST 6.99E-03 -- -- -- -- -- -- -- -- --Fuel Oil Storage Tanks FO ST 6.99E-02 -- -- -- -- -- -- -- -- --Life Boat Tank FO LB ST 7.83E-06 -- -- -- -- -- -- -- -- --Emer. Gen. Fuel Oil Tank FO E GEN ST 1.28E-04 -- -- -- -- -- -- -- -- --Aviation Tanks AV ST 9.82E-02 -- -- -- -- -- -- -- -- --Waste Oil Tanks WO ST 9.32E-04 -- -- -- -- -- -- -- -- --Fugitives FUG 0.19 -- -- -- -- -- -- -- -- --Mud Degassing MUD 9.93 -- -- -- -- -- -- 23.92 -- --Painting PAINT 0.71 -- -- -- 0.22 0.16 0.06 -- -- --Welding WELD -- -- -- -- 0.005 0.005 0.005 -- 9.05E-06 --TOTAL 42.47 579.32 130.76 0.44 14.05 12.40 12.08 46,631.73 8.27E-03 1.04E-02Hazardous Air Pollutants (HAPs) Emissions

Benzene Toluene Xylenes Formaldehyde Acetaldehyde Acrolein Naphthalene 1,3-Butadiene 1,2,4- Trimethylbenzene Ethylbenzene Hexane (-n) PAH bis(2- ethylhexyl) phthalate 2

(lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) (lb/hr) 

Wartsila Diesel Generator Engines GEN 1.08E-01 3.92E-02 2.70E-02 1.10E-02 3.52E-03 1.10E-03 1.82E-02 -- -- -- -- -- -- Emergency Diesel Generator Engine E-GEN 1.39E-02 5.02E-03 3.45E-03 1.41E-03 4.50E-04 1.41E-04 2.32E-03 -- -- -- -- -- -- Lifeboat Engines LB 7.58E-04 3.32E-04 2.31E-04 9.58E-04 6.23E-04 7.51E-05 6.89E-05 3.17E-05 -- -- -- -- -- Fast Rescue Boat Engines MOB 1.06E-03 4.67E-04 3.25E-04 1.35E-03 8.75E-04 1.06E-04 9.68E-05 4.46E-05 -- -- -- -- -- Cement Unit Engines CMU 6.53E-03 2.86E-03 2.00E-03 8.26E-03 5.37E-03 6.48E-04 5.94E-04 2.74E-04 -- -- -- -- -- Offshore Support Vessels OSV 5.14E-02 1.86E-02 1.28E-02 5.23E-03 1.67E-03 5.22E-04 8.62E-03 0.00E+00 -- -- -- -- -- Crewboats CREW 4.07E-02 1.49E-02 1.02E-02 6.04E-03 2.61E-03 5.59E-04 6.70E-03 6.83E-05 -- -- -- -- -- Cement Unit SS Holding Tank FO CMV ST 3.89E-07 4.54E-06 1.17E-05 -- -- -- -- -- 9.58E-06 6.29E-07 7.83E-08 -- -- Fast Boat Tank FO MOB ST 4.87E-09 5.69E-08 1.47E-07 -- -- -- -- -- 1.20E-07 7.87E-09 9.80E-10 -- -- Fuel Oil Service Tanks FO SER ST 1.79E-05 2.09E-04 5.40E-04 -- -- -- -- -- 4.42E-04 2.90E-05 3.61E-06 -- -- Fuel Oil Settling Tanks FO SET ST 1.38E-05 1.61E-04 4.15E-04 -- -- -- -- -- 3.39E-04 2.23E-05 2.77E-06 -- -- Fuel Oil Storage Tanks FO ST 1.38E-04 1.61E-03 4.15E-03 -- -- -- -- -- 3.39E-03 2.23E-04 2.77E-05 -- -- Life Boat Tank FO LB ST 1.54E-08 1.80E-07 4.65E-07 -- -- -- -- -- 3.80E-07 2.49E-08 3.10E-09 -- -- Emer. Gen. Fuel Oil Tank FO E GEN ST 2.52E-07 2.94E-06 7.59E-06 -- -- -- -- -- 6.21E-06 4.07E-07 5.07E-08 -- -- Aviation Tanks AV ST 8.46E-04 8.24E-04 2.93E-04 -- -- -- -- -- -- 7.02E-05 3.41E-03 2.93E-04 -- Waste Oil Tanks WO ST 1.83E-06 2.14E-05 5.53E-05 -- -- -- -- -- 4.52E-05 2.97E-06 3.70E-07 -- -- Fugitives FUG 1.50E-06 6.02E-05 5.45E-04 -- -- -- -- -- 1.88E-03 2.44E-05 1.88E-07 -- -- Mud Degassing MUD -- -- -- -- -- -- -- -- -- -- -- -- -- Painting PAINT -- 2.96E-03 3.66E-01 -- -- -- -- -- -- 8.48E-02 -- -- 3.34E-02 Welding WELD -- -- -- -- -- -- -- -- -- -- -- -- -- TOTAL 0.224 0.087 0.428 0.034 0.015 0.003 0.037 0.0004 0.006 0.0852 0.0034 0.0003 0.0334 

Emission SourceEmission Source

Summary Page 2 of 5 
Statoil

Eastern GOM OCS Air Permitting Project

Maersk Developer Emission Calculations

Drilling Rig Engine Emissions CalculationsEquipment Specifications

Emissions 

Unit ID

Rating

(HP) Make Model Number Serial Number

Wartsila Diesel Generator Engine 1 6,651 Wartsila 16V26A 26957 8/11/2006Wartsila Diesel Generator Engine 2 6,651 Wartsila 16V26A 26958 8/11/2006Wartsila Diesel Generator Engine 3 6,651 Wartsila 16V26A 26959 8/11/2006Wartsila Diesel Generator Engine 4 6,651 Wartsila 16V26A 26960 8/11/2006Wartsila Diesel Generator Engine 5 6,651 Wartsila 16V26A 26961 8/11/2006Wartsila Diesel Generator Engine 6 6,651 Wartsila 16V26A 26962 8/11/2006Wartsila Diesel Generator Engine 7 6,651 Wartsila 16V26A 26963 8/11/2006Wartsila Diesel Generator Engine 8 6,651 Wartsila 16V26A 26964 8/11/2006

E GEN Emergency Diesel Generator Engine 2,551 Caterpillar 3516B S2R00259 11/8/2006

Lifeboat 1 29 BUKH DV29 122433 8/22/2007Lifeboat 2 29 BUKH DV29 122434 8/22/2007Lifeboat 3 29 BUKH DV29 122435 8/22/2007Lifeboat 4 29 BUKH DV29 122436 8/22/2007

MOB Fast Rescue Boat Engine #1 163 Steyr Motors M14 CAM 48227187 3/29/2007

Cement Unit Engine (CMU-1) 500 Caterpillar C15 Z2C00163 10/18/2006Cement Unit Engine (CMU-2) 500 Caterpillar C15 Z2C00149 9/21/2006

Operating Schedule

180 day/yr, annual operating schedule

24 hr/day, daily operating schedule for main engines

150 hr/yr, annual operating schedule for cement units (300 hr/yr total) (Basis: Email from Halliburton)

2 1 hr/month normal operating schedule for life and rescue boats (Source: ) x 2 to account for safety exercises

6.7 hr/month, normal operating schedule for standby generator (Source: Maersk provided 2010 actual hours of operation 40hrs/yr) x 2 to account for emergency use

Emission Calculation (Annual Basis)Criteria Air Pollutant & Greenhouse Gas (CO2e) Emissions Total VOC NOX CO SO2 PM PM10 PM2.5 

Max. Power 

Rating

Percent 

Power1

Adjusted 

Power 

Rating

Run 

Time

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

(kW) (%) (kW) (hr/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW

Gen. Engine 1 4,960 60% 2,976 4,320 0.43 (3) 6.08 8.16 (5) 115.63 0.39 (5) 5.53 0.007 (2) 0.09 0.15 (5) 2.13 0.15 (5) 2.13 0.15 (5) 2.13 696Gen. Engine 2 4,960 60% 2,976 4,320 0.43 (3) 6.08 8.16 (5) 115.63 0.39 (5) 5.53 0.007 (2) 0.09 0.15 (5) 2.13 0.15 (5) 2.13 0.15 (5) 2.13 696Gen. Engine 3 4,960 60% 2,976 4,320 0.43 (3) 6.08 8.16 (5) 115.63 0.39 (5) 5.53 0.007 (2) 0.09 0.15 (5) 2.13 0.15 (5) 2.13 0.15 (5) 2.13 696Gen. Engine 4 4,960 0% 0 4,320 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 5 4,960 0% 0 4,320 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 6 4,960 0% 0 4,320 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 7 4,960 0% 0 4,320 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 8 4,960 0% 0 4,320 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Total Emissions 18.23 346.90 16.58 0.28 6.38 6.38 6.38 

E GEN E-Gen. Engine 1,902 100% 1,902 39 0.43 (3) 0.035 9.20 (1) 0.76 3.35 (3) 0.28 0.007 (2) 5.5E-04 0.30 (3) 0.02 0.24 (3) 0.02 0.24 (3) 0.02 696

Lifeboat 1 22 100% 22 12 1.53 (3) 0.0004 7.50 (1) 0.002 5.50 (1) 0.0016 0.007 (2) 1.9E-06 0.60 (1) 0.0002 0.49 (1) 0.0001 0.48 (1) 0.0001 696Lifeboat 2 22 100% 22 12 1.53 (3) 0.0004 7.50 (1) 0.002 5.50 (1) 0.0016 0.007 (2) 1.9E-06 0.60 (1) 0.0002 0.49 (1) 0.0001 0.48 (1) 0.0001 696Lifeboat 3 22 100% 22 12 1.53 (3) 0.0004 7.50 (1) 0.002 5.50 (1) 0.0016 0.007 (2) 1.9E-06 0.60 (1) 0.0002 0.49 (1) 0.0001 0.48 (1) 0.0001 696Lifeboat 4 22 100% 22 12 1.53 (3) 0.0004 7.50 (1) 0.002 5.50 (1) 0.0016 0.007 (2) 1.9E-06 0.60 (1) 0.0002 0.49 (1) 0.0001 0.48 (1) 0.0001 696Total Emissions 1.7E-03 8.6E-03 6.3E-03 7.6E-06 6.9E-04 5.6E-04 5.5E-04 MOB Engine 1 122 100% 122 12 1.53 (3) 0.002 7.50 (1) 0.01 5.00 (1) 0.01 0.007 (2) 1.1E-05 0.40 (1) 6.43E-04 0.33 (1) 5.29E-04 0.32 (1) 5.13E-04 696Total Emissions 0.002 0.012 0.008 1.1E-05 6.43E-04 5.29E-04 5.13E-04 Cement Engine 1 373 100% 373 150 1.53 (3) 0.09 7.20 (1) 0.44 5.00 (1) 0.31 0.007 (2) 4.1E-04 0.20 (1) 0.012 0.16 (1) 0.010 0.16 (1) 0.010 696Cement Engine 2 373 100% 373 150 1.53 (3) 0.09 7.20 (1) 0.44 5.00 (1) 0.31 0.007 (2) 4.1E-04 0.20 (1) 0.012 0.16 (1) 0.010 0.16 (1) 0.010 696Total Emissions 0.19 0.89 0.62 8.2E-04 0.025 0.020 0.020 

Engine Description Manufacture Year

Emission Factor Emission Factor Emission Factor Emis

GENGEN

LB

CMUMOBCMU

Emission Factor

LB

Emission Factor Emissions 

Unit ID

Emission Factor Emission Factor

Engine Description

The Maersk Developer is a semi-submersible drilling rig equipped with several internal compression ignition engines (diesel engines) used to generate power to operate various equipment aboard the rig. The following documents the basis and emission estimates for each engine on the Developer.

Drilling Rig - updated Sept. 12, 2013 Page 3 of 5 
Statoil

Eastern GOM OCS Air Permitting Project

Maersk Developer Emission Calculations

Emission Calculation (Annual Basis)Hazardous Air Pollutant (HAP) Emissions Benzene Toluene Xylenes Formaldehyde Acetaldehyde Acrolein Naphthalene 

Maximum 

Power 

Rating

Percent 

Power1

Adjusted 

Power 

Rating

Run 

Time

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

(kW) (%) (kW) (hr/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW-hr) Ref (ton/yr) (g/kW

Gen. Engine 1 4,960 60% 2,976 4,320 0.0033 (3) 4.68E-02 0.0012 (3) 1.70E-02 8.22E-04 (3) 1.16E-02 3.36E-04 (3) 4.76E-03 1.07E-04 (3) 1.52E-03 3.36E-05 (3) 4.75E-04 5.54E-04 (3) 7.84E-03 -Gen. Engine 2 4,960 60% 2,976 4,320 0.0033 (3) 4.68E-02 0.0012 (3) 1.70E-02 8.22E-04 (3) 1.16E-02 3.36E-04 (3) 4.76E-03 1.07E-04 (3) 1.52E-03 3.36E-05 (3) 4.75E-04 5.54E-04 (3) 7.84E-03 -Gen. Engine 3 4,960 60% 2,976 4,320 0.0033 (3) 4.68E-02 0.0012 (3) 1.70E-02 8.22E-04 (3) 1.16E-02 3.36E-04 (3) 4.76E-03 1.07E-04 (3) 1.52E-03 3.36E-05 (3) 4.75E-04 5.54E-04 (3) 7.84E-03 -Gen. Engine 4 4,960 0% 0 4,320 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 5 4,960 0% 0 4,320 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 6 4,960 0% 0 4,320 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 7 4,960 0% 0 4,320 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 4 4,960 0% 0 4,320 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Total Emissions 1.40E-01 5.09E-02 3.49E-02 1.43E-02 4.56E-03 1.43E-03 2.35E-02 

E GEN E-Gen. Engine 1,902 100% 1,902 39 0.0033 (3) 2.73E-04 0.0012 (3) 9.90E-05 8.22E-04 (3) 6.80E-05 3.36E-04 (3) 2.78E-05 1.07E-04 (3) 8.88E-06 3.36E-05 (3) 2.78E-06 5.54E-04 (3) 4.58E-05 -

Lifeboat 1 22 100% 22 12 0.0040 (3) 1.14E-06 0.0017 (3) 4.98E-07 1.21E-03 (3) 3.47E-07 5.02E-03 (3) 1.44E-06 3.27E-03 (3) 9.34E-07 3.94E-04 (3) 1.13E-07 3.61E-04 (3) 1.03E-07 1.66Lifeboat 2 22 100% 22 12 0.0040 (3) 1.14E-06 0.0017 (3) 4.98E-07 1.21E-03 (3) 3.47E-07 5.02E-03 (3) 1.44E-06 3.27E-03 (3) 9.34E-07 3.94E-04 (3) 1.13E-07 3.61E-04 (3) 1.03E-07 1.66Lifeboat 3 22 100% 22 12 0.0040 (3) 1.14E-06 0.0017 (3) 4.98E-07 1.21E-03 (3) 3.47E-07 5.02E-03 (3) 1.44E-06 3.27E-03 (3) 9.34E-07 3.94E-04 (3) 1.13E-07 3.61E-04 (3) 1.03E-07 1.66Lifeboat 4 22 100% 22 12 0.0040 (3) 1.14E-06 0.0017 (3) 4.98E-07 1.21E-03 (3) 3.47E-07 5.02E-03 (3) 1.44E-06 3.27E-03 (3) 9.34E-07 3.94E-04 (3) 1.13E-07 3.61E-04 (3) 1.03E-07 1.66Total Emissions 4.55E-06 1.99E-06 1.39E-06 5.75E-06 3.74E-06 4.51E-07 4.13E-07 MOB Engine 1 122 100% 122 12 0.0040 (3) 6.39E-06 0.0017 (3) 2.80E-06 1.21E-03 (3) 1.95E-06 5.02E-03 (3) 8.08E-06 3.27E-03 (3) 5.25E-06 3.94E-04 (3) 6.33E-07 3.61E-04 (3) 5.81E-07 1.66Total Emissions 6.39E-06 2.80E-06 1.95E-06 8.08E-06 5.25E-06 6.33E-07 5.81E-07 Cement Engine 1 373 100% 373 150 0.0040 (3) 2.45E-04 0.0017 (3) 1.07E-04 1.21E-03 (3) 7.48E-05 5.02E-03 (3) 3.10E-04 3.27E-03 (3) 2.01E-04 3.94E-04 (3) 2.43E-05 3.61E-04 (3) 2.23E-05 1.66Cement Engine 2 373 100% 373 150 0.0040 (3) 2.45E-04 0.0017 (3) 1.07E-04 1.21E-03 (3) 7.48E-05 5.02E-03 (3) 3.10E-04 3.27E-03 (3) 2.01E-04 3.94E-04 (3) 2.43E-05 3.61E-04 (3) 2.23E-05 1.66Total Emissions 4.90E-04 2.15E-04 1.50E-04 6.20E-04 4.03E-04 4.86E-05 4.45E-05 

Emission Calculation (Maximum Hourly Basis)Criteria Air Pollutant & Greenhouse Gas (CO2e) Emissions Total VOC NOX CO SO2 PM PM10 PM2.5 

Maximum 

Power 

Rating

Percent 

Power1

Adjusted 

Power 

Rating

Run 

Time

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

(kW) (%) (kW) (hr/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW

Gen. Engine 1 4,960 60% 2,976 1 0.43 (3) 2.81 8.16 (5) 53.53 0.39 (5) 2.56 0.007 (2) 0.04 0.15 (5) 0.98 0.15 (5) 0.98 0.15 (5) 0.98 696Gen. Engine 2 4,960 60% 2,976 1 0.43 (3) 2.81 8.16 (5) 53.53 0.39 (5) 2.56 0.007 (2) 0.04 0.15 (5) 0.98 0.15 (5) 0.98 0.15 (5) 0.98 696Gen. Engine 3 4,960 60% 2,976 1 0.43 (3) 2.81 8.16 (5) 53.53 0.39 (5) 2.56 0.007 (2) 0.04 0.15 (5) 0.98 0.15 (5) 0.98 0.15 (5) 0.98 696Gen. Engine 4 4,960 60% 2,976 1 0.43 (3) 2.81 8.16 (5) 53.53 0.39 (5) 2.56 0.007 (2) 0.04 0.15 (5) 0.98 0.15 (5) 0.98 0.15 (5) 0.98 696Gen. Engine 5 4,960 60% 2,976 1 0.43 (3) 2.81 8.16 (5) 53.53 0.39 (5) 2.56 0.007 (2) 0.04 0.15 (5) 0.98 0.15 (5) 0.98 0.15 (5) 0.98 696Gen. Engine 6 4,960 0% 0 1 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 7 4,960 0% 0 1 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Gen. Engine 8 4,960 0% 0 1 0.43 (3) 0.00 8.16 (5) 0.00 0.39 (5) 0.00 0.007 (2) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 0.15 (5) 0.00 696Total Emissions 14.07 267.67 12.79 0.22 4.92 4.92 4.92 

E GEN E-Gen. Engine 1,902 100% 1,902 1 0.43 (3) 1.80 9.20 (1) 38.58 3.35 (3) 14.03 0.007 (2) 0.03 0.30 (3) 1.24 0.24 (3) 1.02 0.24 (3) 0.99 696

Lifeboat 1 22 100% 22 1 1.53 (3) 0.07 7.50 (1) 0.36 5.50 (1) 0.26 0.007 (2) 3.15E-04 0.60 (1) 0.03 0.49 (1) 0.02 0.48 (1) 0.02 696Lifeboat 2 22 100% 22 1 1.53 (3) 0.07 7.50 (1) 0.36 5.50 (1) 0.26 0.007 (2) 3.15E-04 0.60 (1) 0.03 0.49 (1) 0.02 0.48 (1) 0.02 696Lifeboat 3 22 100% 22 1 1.53 (3) 0.07 7.50 (1) 0.36 5.50 (1) 0.26 0.007 (2) 3.15E-04 0.60 (1) 0.03 0.49 (1) 0.02 0.48 (1) 0.02 696Lifeboat 4 22 100% 22 1 1.53 (3) 0.07 7.50 (1) 0.36 5.50 (1) 0.26 0.007 (2) 3.15E-04 0.60 (1) 0.03 0.49 (1) 0.02 0.48 (1) 0.02 696

Total Emissions 0.29 1.43 1.05 1.26E-03 0.11 0.09 0.09 

MOB Engine 1 122 100% 122 1 1.53 (3) 0.41 7.50 (1) 2.01 5.00 (1) 1.34 0.007 (2) 1.77E-03 0.40 (1) 0.11 0.33 (1) 0.09 0.32 (1) 0.09 696

Total Emissions 0.41 2.01 1.34 1.77E-03 0.11 0.09 0.09 

Cement Engine 1 373 100% 373 1 1.53 (3) 1.26 7.20 (1) 5.92 5.00 (1) 4.11 0.007 (2) 0.005 0.20 (1) 0.16 0.16 (1) 0.14 0.16 (1) 0.13 696

Cement Engine 2 373 100% 373 1 1.53 (3) 1.26 7.20 (1) 5.92 5.00 (1) 4.11 0.007 (2) 0.005 0.20 (1) 0.16 0.16 (1) 0.14 0.16 (1) 0.13 696Total Emissions 2.51 11.84 8.22 0.011 0.33 0.27 0.26 

CMUMOB

GEN

Emission Factor

Engine Description

Emission Factor

Emissions 

Unit ID

LB

Emissions 

Unit ID

Emission Factor Emission Factor

Emission Factor Emission Factor Emission Factor Emission Factor Emission Factor Emis

LB

MOBCMU

Emission Factor 

Engine Description

Emission Factor

Emission Factor Emission Factor Emis

GEN

Emission Factor

Drilling Rig - updated Sept. 12, 2013 Page 4 of 5 
Statoil

Eastern GOM OCS Air Permitting Project

Maersk Developer Emission Calculations

Emission Calculation (Maximum Hourly Basis)Hazardous Air Pollutant (HAP) Emissions Benzene Toluene Xylenes Formaldehyde Acetaldehyde Acrolein Naphthalene 

Maximum 

Power 

Rating

Percent 

Power1

Adjusted 

Power 

Rating

Run 

Time

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

Emission 

Rate

(kW) (%) (kW) (hr/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW-hr) Ref (lb/hr) (g/kW

Gen. Engine 1 4,960 60% 2,976 1 0.0033 (3) 2.17E-02 0.0012 (3) 7.85E-03 8.22E-04 (3) 5.39E-03 3.36E-04 (3) 2.20E-03 1.07E-04 (3) 7.04E-04 3.36E-05 (3) 2.20E-04 5.54E-04 (3) 3.63E-03 -Gen. Engine 2 4,960 60% 2,976 1 0.0033 (3) 2.17E-02 0.0012 (3) 7.85E-03 8.22E-04 (3) 5.39E-03 3.36E-04 (3) 2.20E-03 1.07E-04 (3) 7.04E-04 3.36E-05 (3) 2.20E-04 5.54E-04 (3) 3.63E-03 -Gen. Engine 3 4,960 60% 2,976 1 0.0033 (3) 2.17E-02 0.0012 (3) 7.85E-03 8.22E-04 (3) 5.39E-03 3.36E-04 (3) 2.20E-03 1.07E-04 (3) 7.04E-04 3.36E-05 (3) 2.20E-04 5.54E-04 (3) 3.63E-03 -Gen. Engine 4 4,960 60% 2,976 1 0.0033 (3) 2.17E-02 0.0012 (3) 7.85E-03 8.22E-04 (3) 5.39E-03 3.36E-04 (3) 2.20E-03 1.07E-04 (3) 7.04E-04 3.36E-05 (3) 2.20E-04 5.54E-04 (3) 3.63E-03 -Gen. Engine 5 4,960 60% 2,976 1 0.0033 (3) 2.17E-02 0.0012 (3) 7.85E-03 8.22E-04 (3) 5.39E-03 3.36E-04 (3) 2.20E-03 1.07E-04 (3) 7.04E-04 3.36E-05 (3) 2.20E-04 5.54E-04 (3) 3.63E-03 -Gen. Engine 6 4,960 0% 0 1 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 7 4,960 0% 0 1 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Gen. Engine 8 4,960 0% 0 1 0.0033 (3) 0.00E+00 0.0012 (3) 0.00E+00 8.22E-04 (3) 0.00E+00 3.36E-04 (3) 0.00E+00 1.07E-04 (3) 0.00E+00 3.36E-05 (3) 0.00E+00 5.54E-04 (3) 0.00E+00 -Total Emissions 1.08E-01 3.92E-02 2.70E-02 1.10E-02 3.52E-03 1.10E-03 1.82E-02 

E GEN E-Gen. Engine 1,902 100% 1,902 1 0.0033 (3) 1.39E-02 0.0012 (3) 5.02E-03 8.22E-04 (3) 3.45E-03 3.36E-04 (3) 1.41E-03 1.07E-04 (3) 4.50E-04 3.36E-05 (3) 1.41E-04 5.54E-04 (3) 2.32E-03 -

Lifeboat 1 22 100% 22 1 0.0040 (3) 1.89E-04 0.0017 (3) 8.30E-05 1.21E-03 (3) 5.79E-05 5.02E-03 (3) 2.40E-04 3.27E-03 (3) 1.56E-04 3.94E-04 (3) 1.88E-05 3.61E-04 (3) 1.72E-05 1.66Lifeboat 2 22 100% 22 1 0.0040 (3) 1.89E-04 0.0017 (3) 8.30E-05 1.21E-03 (3) 5.79E-05 5.02E-03 (3) 2.40E-04 3.27E-03 (3) 1.56E-04 3.94E-04 (3) 1.88E-05 3.61E-04 (3) 1.72E-05 1.66Lifeboat 3 22 100% 22 1 0.0040 (3) 1.89E-04 0.0017 (3) 8.30E-05 1.21E-03 (3) 5.79E-05 5.02E-03 (3) 2.40E-04 3.27E-03 (3) 1.56E-04 3.94E-04 (3) 1.88E-05 3.61E-04 (3) 1.72E-05 1.66Lifeboat 4 22 100% 22 1 0.0040 (3) 1.89E-04 0.0017 (3) 8.30E-05 1.21E-03 (3) 5.79E-05 5.02E-03 (3) 2.40E-04 3.27E-03 (3) 1.56E-04 3.94E-04 (3) 1.88E-05 3.61E-04 (3) 1.72E-05 1.66Total Emissions 7.58E-04 3.32E-04 2.31E-04 9.58E-04 6.23E-04 7.51E-05 6.89E-05 MOB Engine 1 122 100% 122 1 0.0040 (3) 1.06E-03 0.0017 (3) 4.67E-04 1.21E-03 (3) 3.25E-04 5.02E-03 (3) 1.35E-03 3.27E-03 (3) 8.75E-04 3.94E-04 (3) 1.06E-04 3.61E-04 (3) 9.68E-05 1.66Total Emissions 1.06E-03 4.67E-04 3.25E-04 1.35E-03 8.75E-04 1.06E-04 9.68E-05 Cement Engine 1 373 100% 373 1 0.0040 (3) 3.27E-03 0.0017 (3) 1.43E-03 1.21E-03 (3) 9.98E-04 5.02E-03 (3) 4.13E-03 3.27E-03 (3) 2.68E-03 3.94E-04 (3) 3.24E-04 3.61E-04 (3) 2.97E-04 1.66Cement Engine 2 373 100% 373 1 0.0040 (3) 3.27E-03 0.0017 (3) 1.43E-03 1.21E-03 (3) 9.98E-04 5.02E-03 (3) 4.13E-03 3.27E-03 (3) 2.68E-03 3.94E-04 (3) 3.24E-04 3.61E-04 (3) 2.97E-04 1.66Total Emissions 6.53E-03 2.86E-03 2.00E-03 8.26E-03 5.37E-03 6.48E-04 5.94E-04 

Emission Factor References

1. Certification level based on EPA Tier 1 and Tier II standards per 40 CFR 89 or 94.2. Calculation - Based on weight percent sulfur in fuel and assumes 100% oxidation to SO2.

3. AP-42 - Section 3.4 for large engines and Section 3.3 for small engines (<600 hp).4. EPA - CO2, CH4, and N2O emission factors from the Mandatory Reporting Rule (40 CFR 98) for general combustion (Table C-1 and C-2).

5. Vendor supplied data at different engine loads. Maximum emission factor for 100%, 75%, and 50% loads.6. EPA publication EPA-454/R-98-006, "Locating and Estimating Air Emissions from Sources of Lead and Lead Compounds," May 1998.

Conversions

453.6 g/lb, conversion factor

2000 lb/ton

1.341 hp/kW

CMUMOB

GEN

Emissions 

Unit ID

Emission Factor Emission Factor Emission Factor Emission Factor Emission Factor Emission Factor Emission Factor

LB

Engine Description

Emis

Drilling Rig - updated Sept. 12, 2013 Page 5 of 5