## Mosaic Fertilizer, LLC (“Mosaic”) Uncle Sam Plant

Response to Question #4 of September 1, 2015 Clean Air Act Section 114(a) Information Request

August 2006 Preliminary BART

Inventory Baseline Emission Rates June 2007 Best Available Retrofit Technology Analysis/ July 2015 Best Available Retrofit Technology Analysis

Baseline Emission Rates

Sulfur Dioxide Oxides of

Nitrogen Sulfur Dioxide Oxides of Nitrogen

Emissions Unit SO 2 (tons/day) NOx

(tons/day) SO2

(lb/hr) Documentation for SO2 (lb/hr) SO2 (tons/day) NOx

(lb/hr) Documentation for NOx (lb/hr) NOx (tons/day) A Train Single Absorption H 2SO4Plant (EPN SATrain1, EQT 0067) 27.007 0.12 2,250.16 Maximum 3-hour rolling average PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 27.002 10.00 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.120

A Train Start-Up Burner (EPN S-ATrain2, EQT 0068) 0.0008 0.387 0.07 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.00084 32.31 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.388

A Train Fugitive Emissions (EPN S-ATrain3, FUG 0002) 0.0020

- 115.69 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V1, the maximum short-term PTE rate in effect before application of proposed BART controls 1.388

- - -

D Train Double Absorption H 2SO4Plant (EPN SDTrain1, EQT 0074) 4.500 0.12 375.00 Maximum 3-hour rolling average PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 4.500 11.25 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.135

D Train Start-Up Burner (EPN S-DTrain2, EQT 0075) 0.0008 0.387 0.07 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.00084 32.31 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.388

D Train Fugitive Emissions (EPN S-DTrain3, FUG 0003) 0.0030

- 186.88 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V1, the maximum short-term PTE rate in effect before application of proposed BART controls 2.243

- - -

E Train Double Absorption H 2SO4Plant (EPN SETrain1, EQT 0076) 7.599 0.288

E Train Start-Up Burner (EPN S-ETrain2, EQT 0077) 0.0008 0.387

E Train Fugitive Emissions (EPN S-ETrain3, FUG 0005) 0.0054

-
Sulfur Unloading Pit (EPN S-SulfurPit, EQT 0081) 0.0019

- 0.13 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.0016

- - -

Sulfur Storage Tank A (EPN S-SulfurA, EQT 0082) 0.0039

- 0.28 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.0034

- - - Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; See January 14, 1991 preconstruction permit application) Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; See January 14, 1991 preconstruction permit application) Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; See January 14, 1991 preconstruction permit application)

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## Mosaic Fertilizer, LLC (“Mosaic”) Uncle Sam Plant

Response to Question #4 of September 1, 2015 Clean Air Act Section 114(a) Information Request

August 2006 Preliminary BART

Inventory Baseline Emission Rates June 2007 Best Available Retrofit Technology Analysis/ July 2015 Best Available Retrofit Technology Analysis

Baseline Emission Rates

Sulfur Dioxide Oxides of

Nitrogen Sulfur Dioxide Oxides of Nitrogen

Emissions Unit SO 2 (tons/day) NOx

(tons/day) SO2

(lb/hr) Documentation for SO2 (lb/hr) SO2 (tons/day) NOx

(lb/hr) Documentation for NOx (lb/hr) NOx (tons/day) Sulfur Storage Tank B (EPN S-SulfurB, EQT 0083) 0.0039

- 0.28 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.0034

- - -

Dock Fugitive Emissions (EPN S-DockFug, FUG 0004) 0.0017

- 0.14 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before application of proposed BART controls 0.0017

- - -

No. 1 Packaged Steam Boiler (EPN S-Boiler1, EQT 0072) - 0.516 0.09 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before the unit was shut down and deleted from Title V

permit 0.0011 43.08 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before the unit was shut down and deleted from Title V

permit 0.517

No. 2 Packaged Steam Boiler (EPN S-Boiler2, EQT 0073) - 0.516 0.09 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before the unit was shut down and deleted from Title V

permit 0.0011 43.08 Hourly maximum PTE emission rate listed in Permit No. 2560-00004-V0/V1, the maximum short-term PTE rate in effect before the unit was shut down and deleted from Title V

permit 0.517

Diesel-Fired Air Compressor (EPN S-DEngine1, EQT 0086) 0.0080 0.133

Diesel-Fired Emergency Generator (EPN SDEngine2, EQT 0087) 0.0050 0.089

Portable Diesel-Fired Equipment - Phos Acid (EPN PPortEquip, EQT 0066)/ Portable Diesel-Fired Equipment CAP - Phos Acid (EPN PPortEquipCAP, GRP 0009; EQTs 0092-0099) - 0.0814

Portable Diesel-Fired Equipment - Maintenance (EPN M-4, EQT 0004)/ Maintenance Portable Diesel-Fired Equipment CAP (EPN M-4CAP; EQTs 0100-0102, 0108) - 0.05

Sulfur Surge Tank (EPN S-SurgeTnk, EQT 0084) 0.0018

-
Diesel Pump on Stack - Seepage Pump (EPN SDEngine3, EQT 0088) 0.0056 0.084

Diesel-Fired Water Pump (EPN S-DEngine4, EQT 0089) 0.0044 0.066

Rental Hydroblaster (EPN S-DEngine5, EQT 0090) 0.0077 0.116 Emissions Unit Not BART-Eligible (Nonroad Engine; Deleted from Title V permit) Emissions Units Not BART-Eligible (Nonroad Engines; Deleted from Title V permit)

Emissions Units Not BART-Eligible (Nonroad Engines; Deleted from Title V permit, except for EQT 0102) (EQT 0102 was mistakenly not deleted from Title V permit when this permit was recently opened; EQT 0102 will be deleted from Title V permit the next time the permit is opened)
Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; See December 21, 1979 preconstruction permit application) Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; Engine date of manufacture - July 1, 1979)

Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; Engine date of manufacture - October 13, 2004)

Emissions Unit Not BART-Eligible (Nonroad Engine; Deleted from Title V permit) Emissions Unit Not BART-Eligible ("In Existence" > August 7, 1977; Engine date of manufacture - July 31, 1984)

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## Mosaic Fertilizer, LLC (“Mosaic”) Uncle Sam Plant

Response to Question #4 of September 1, 2015 Clean Air Act Section 114(a) Information Request

August 2006 Preliminary BART

Inventory Baseline Emission Rates June 2007 Best Available Retrofit Technology Analysis/ July 2015 Best Available Retrofit Technology Analysis

Baseline Emission Rates

Sulfur Dioxide Oxides of

Nitrogen Sulfur Dioxide Oxides of Nitrogen

Emissions Unit SO 2 (tons/day) NOx

(tons/day) SO2

(lb/hr) Documentation for SO2 (lb/hr) SO2 (tons/day) NOx

(lb/hr) Documentation for NOx (lb/hr) NOx (tons/day) TOTAL (tons/day) 39.163 3.340 35.147 2.064

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