Technical Memorandum 

TO: Brenda Shine, Environmental Engineer 

Refining and Chemicals Group, SPPD (E143-01) 

 

FROM: Eric Goehl, Environmental Protection Specialist 

Refining and Chemicals Group, SPPD (E143-01)

DATE: March 29, 2012

SUBJECT: Summary of Sulfur Recovery Unit Emission Source Test Reports

I. Purpose 

 The objective of this document is to provide a summary of the Sulfur Recovery Unit 

(SRU) emission source test reports received by the EPA from the 2011 Information Collection 

Request (ICR) of the Petroleum Refinery industry. 

II. Background 

On April 1, 2011, the EPA sent an ICR to facilities in the U.S. petroleum refining 

industry. The ICR was comprehensive and designed to collect information on processing 

characteristics, crude slate characteristics, emissions inventories and source testing to bolster our 

current data and fill known data gaps. The ICR had four components: (1) a questionnaire on 

processes and controls to be completed by all petroleum refineries (Component 1); (2) an 

emissions inventory to be developed by all petroleum refineries using the emissions estimation 

protocol developed for this effort (Component 2); (3) distillation feed sampling and analysis to 

be conducted by all petroleum refineries (Component 3); and (4) emissions source testing to be 

completed in accordance with an EPA-approved protocol for specific sources at specific 

petroleum refineries (Component 4). 

Component 4 of the ICR required source testing for twelve different types of emission 

sources or units: fluid catalytic cracking units (FCCU), thermal catalytic cracking units, catalytic 

reforming units, sulfur recovery units, delayed coking units, fluid coking units, hydrocracking 

units, hydrogen plants, asphalt blowing units, fuel gas systems, cooling water systems, and 

wastewater treatment systems. This memorandum summarizes the results of the FCCU sources 

tests. A similar memorandum is available for the other sources required to be tested as a result of 
this ICR. Facilities often claimed specific process information as CBI, and included that 

information in the CBI version of the emission source test report stored in the EPA’s CBI office 

in Research Triangle Park, NC. However, emissions data cannot be claimed as CBI. This 

memorandum summarizes and presents only non-CBI data. 

III. Source-specific Testing Program

Below is a list of the ten facilities required to perform an emission source test on 

their SRU. 

• Marathon Ashland Petroleum LLC – Garyville, LA (LA3C0610) 

• ExxonMobil Refinery and Supply – Baytown, TX (TX3B1160) 

• Phillips 66 Company Sweeny Complex – Brazoria, TX (TX3B1240) 

• Valero Refining Company – Port Arthur, TX (TX3B1250) 

• Shell Oil Anacortes Refinery – Anacortes, WA (WA5A1410) 

• Motiva – Port Arthur, TX (TX3B1220) – Received this test report voluntarily from the 

facility. 

Owners or operators of the FCCU at these facilities were required to test for: 

• Speciated volatile organic hazardous air pollutants (HAP) 

• Speciated semi-volatile organic HAP 

• Total hydrocarbons, methane, and ethane 

• Aldehydes 

• Carbon monoxide 

• Hydrogen sulfide (H2S), carbonyl sulfide (COS), and carbon disulfide (CS2) 

• Total reduced sulfur compounds (TRS) 

• O2, CO2, moisture, and gas flow rate. 

The EPA required that the data collected from the emission source testing to be reported 

using the EPA Electronic Reporting Tool (ERT). The ERT is a Microsoft® Access database 

application. If the facility conducted testing using a method not currently supported by the ERT, 

the facility was required to report the results in the Refinery Testing Supplement, a Microsoft® 

Excel spreadsheet. After completing the Refinery Testing Supplement, the refineries were also to 

submit an electronic copy of the emission test report, preferably in PDF format. 

2 
3 

IV. Results 

A summary of the emission results for the SRU are provided in attached spreadsheet. In 

order to better characterize the reported data from the emission test reports, detection level 

information was provided in the attached summary spreadsheet. The following designations were 

used to describe the detection levels of the reported emissions data. 

• DLL = Detection Level Limited = 1 or 2 runs below detection limit 

• BDL = Below Detection Limit = All three runs are below detection limit 

• No designation = All three runs are above detection limit 

 
Summary of SRU Emission Test Report Data

75-07-0 Acetaldehyde 2.71E-02 BDL 1.70E-04 BDL 8.20E-04 BDL 7.09E-05 BDL 50-00-0 Formaldehyde 4.47E-03 1.20E-02 BDL 4.28E-03 4.65E-04 DLL 74-90-8 Hydrogen cyanide

Propanal BDL 4.28E-03 Propionaldehyde BDL 8.22E-05 BDL 1.50E-05 BDL 7.00E-05 BDL 

7647-01-0 Hydrogen Chloride 7782-41-4 Hydrogen Fluoride 67-64-1 Acetone DLL 3.30E-01 2.24E-01 5.34E-01 BDL 4.70E-02 BDL 750-05-8 Acetonitrile BDL 2.15E-08 BDL 3.00E-02 DLL 1.14E-01 BDL 4.12E-02 BDL 107-02-8 Acrolein BDL 2.50E-01 BDL 7.02E-02 DLL 1.22E-02 BDL 3.92E-02 BDL 107-13-1 Acrylonitrile BDL 2.15E-08 BDL 2.69E-03 DLL 1.43E-02 BDL 4.14E-02 BDL 71-43-2 Benzene BDL 2.40E-01 DLL 1.53E-04 BDL 1.13E-02 BDL 4.04E-02 BDL 106-99-0 1,3-Butadiene BDL 1.60E-01 BDL 7.59E-04 BDL 5.71E-03 BDL 3.89E-02 BDL 75-15-0 Carbon Disulfide BDL 3.00E-02 7.87E-04 BDL 1.13E-02 BDL 1.59E-02 108-90-7 Chlorobenzene BDL 4.29E-09 BDL 5.07E-04 BDL 1.13E-02 BDL 4.70E-03 DLL 98-82-8 Cumene (Isopropylbenzene) BDL 3.35E-09 BDL 1.13E-03 BDL 1.13E-02 BDL 3.51E-03 BDL 106-93-4 1,2-Dibromoethane BDL 5.40E-01 BDL 5.00E-04 BDL 1.13E-02 BDL 1.04E-01 BDL 100-41-4 Ethylbenzene DLL 3.28E-09 BDL 1.89E-03 BDL 1.13E-02 BDL 3.58E-03 BDL 110-54-3 Hexane DLL 2.50E-01 DLL 1.07E-03 BDL 9.47E-03 BDL 4.19E-02 BDL 

Isooctane BDL 2.89E-03

LA3C0610 - Marathon 

Garyville, LA

DL lb/hr

T

Co

S

DL lb/hr DL 

VOLATILE ORGANIC HAP

CAS # Compound

TX3B1160 - ExxonMobil 

Baytown, TX

WA5A1410 - Shell Oil 

Puget Sound Refinery 

Anacortes, WA

TX3B1250 - Valero 

Port Arthur, TX

Detection 

Limit (DL) DL lb/hr lb/hr

108-10-1 Methyl iso-Butyl Ketone BDL 3.08E-09 BDL 1.13E-03 BDL 1.15E-02 BDL 3.48E-03 BDL 1634-04-4 Methyl t-Butyl Ether (MTBE) BDL 2.87E-09 BDL 2.38E-04 BDL 1.13E-02 BDL 3.61E-03 BDL 75-09-2 Methylene Chloride BDL 9.90E-01 4.87E-02 5.37E-01 BDL 1.79E-01 BDL 98-95-3 Nitrobenzene BDL 9.53E-04 4.79E-04 BDL 5.67E-02 4.66E-03 BDL 79-46-9 2-Nitropropane BDL 2.64E-08 BDL 2.69E-02 BDL 1.13E-02 BDL 3.84E-02 BDL 109-66-0 Pentane DLL 3.40E-01 BDL 3.80E-03 BDL 5.71E-03 BDL 4.01E-02 BDL 100-42-5 Styrene BDL 3.50E-09 BDL 8.60E-04 BDL 1.13E-02 BDL 3.81E-03 BDL 127-18-4 Tetrachloroethene BDL 5.40E-01 BDL 1.03E-03 BDL 1.13E-02 BDL 1.04E-01 BDL 108-88-3 Toluene DLL 3.20E-01 DLL 8.06E-04 BDL 1.15E-02 BDL 4.68E-02 BDL 

Trichloroethene BDL 6.40E-01 BDL 6.45E-04 BDL 1.15E-02 BDL 9.72E-02 BDL 

540-84-1 2,2,4-Trimethylpentane BDL 2.67E-09 BDL 1.35E-02 BDL 1.13E-02 BDL 1330-20-7 Xylene BDL 5.38E-03 BDL 1.13E-02

o-Xylene BDL 3.41E-09 BDL 3.64E-03 BDL m&p-Xylenes BDL 3.31E-09 BDL 3.54E-03 BDL 

83-32-9 Acenaphthene BDL 9.53E-04 2.12E-05 BDL 1.10E-07 BDL 1.15E-04 BDL 209-96-8 Acenaphthylene BDL 9.53E-04 4.74E-05 DLL 2.04E-07 BDL 1.16E-04 BDL 62-53-3 Aniline BDL 9.53E-04 1.46E-03 BDL 1.70E-08 BDL 3.56E-04 BDL 120-12-7 Anthracene BDL 9.53E-04 4.03E-05 1.37E-07 BDL 1.36E-04 BDL 92-87-5 Benzidine BDL 9.53E-03 1.01E-02 BDL 3.54E-07 BDL 2.51E-03 BDL 56-55-3 Benzo(a)Anthracene 8.58E-04 1.10E-05 BDL 3.70E-08 BDL 1.27E-04 BDL 205-99-2 Benzo(b)Fluoranthene BDL 9.53E-04 8.20E-05 BDL 3.70E-08 BDL 1.68E-04 BDL 207-08-9 Benzo(k)Fluoranthene BDL 9.53E-04 1.10E-04 BDL 3.70E-08 BDL 2.09E-04 BDL 191-24-2 Benzo(ghi)Perylene BDL 9.53E-04 1.34E-05 DLL 1.11E-07 BDL 1.36E-04 BDL 

SVOC
Summary of SRU Emission Test Report Data

LA3C0610 - Marathon 

Garyville, LA

DL lb/hr

T

Co

S

CAS # Compound DL lb/hr DL 

TX3B1160 - ExxonMobil 

Baytown, TX

WA5A1410 - Shell Oil 

Puget Sound Refinery 

Anacortes, WA

TX3B1250 - Valero 

Port Arthur, TX

Detection 

Limit (DL) DL lb/hr lb/hr

50-32-8 Benzo(a)Pyrene BDL 9.53E-04 7.81E-06 BDL 3.70E-08 BDL 1.58E-04 BDL 192-97-2 Benzo(e)Pyrene BDL 9.53E-04 1.60E-05 BDL 2.24E-07 BDL 3.56E-05 BDL 92-52-4 Biphenyl 4.58E-04 1.95E-02 DLL 2.02E-06 BDL 4.19E-05 DLL 1319-77-3 Cresols BDL 9.53E-04 1.59E-03 BDL 3.35E-04 BDL 218-01-9 Chrysene* BDL 9.53E-04 7.80E-05 BDL 3.70E-08 BDL 1.27E-04 BDL 53-70-3 Dibenzo(a,h)Anthracene* BDL 9.53E-04 1.03E-05 BDL 3.70E-08 BDL 1.26E-04 BDL 132-64-9 Dibenzofuran BDL 9.53E-04 1.29E-03 BDL 2.10E-08 BDL 1.16E-04 BDL 192-65-4 Dibenzo(a,e)pyrene BDL 9.53E-04 1.15E-04 BDL 3.70E-08 BDL 2.85E-05 BDL 119-90-4 3,3'-Dimethoxybenzidine BDL 9.53E-03 2.36E-03 BDL 2.70E-07 BDL 5.87E-04 BDL 60-11-7 Dimethylaminobenzene BDL 9.53E-04 3.94E-04 BDL 1.90E-08 BDL 1.01E-04 BDL 57-97-6 7,12-Dimethybenz(a)anthracene BDL 9.53E-04 5.89E-04 BDL 3.70E-08 BDL 1.47E-04 BDL 119-93-7 3,3'-Dimethylbenzidine 3.08E-03 BDL 2.70E-07 BDL 7.54E-04 BDL 122-09-8 a,a-Dimethylphenethylamine BDL 2.38E-03 1.40E-03 BDL 1.12E-07 BDL 3.48E-04 BDL 105-67-9 2,4-Dimethylphenol BDL 9.53E-03 1.12E-03 BDL 2.40E-08 BDL 2.72E-04 BDL 206-44-0 Fluoranthene BDL 9.53E-04 3.97E-05 BDL 9.30E-08 BDL 1.47E-04 BDL 86-73-7 Fluorene BDL 9.53E-04 2.52E-03 2.95E-07 BDL 1.26E-04 BDL 193-39-5 Indeno(1,2,3-cd)Pyrene BDL 9.53E-04 6.96E-06 DLL 1.45E-07 BDL 1.27E-04 BDL 78-59-1 Isophorone BDL 9.53E-04 4.76E-04 BDL 2.10E-08 BDL 1.16E-04 BDL 56-49-5 3-Methylcholanthrene BDL 9.53E-04 6.44E-04 BDL 3.70E-08 BDL 1.58E-04 BDL 91-57-6 2-Methylnaphthalene BDL 9.53E-04 6.12E-04 3.30E-07 BDL 1.25E-04 BDL 

2-Methylphenol BDL 2.00E-08 3-Methylphenol & 4-Methylphenol BDL 5.30E-08 

91-20-3 Naphthalene 7.48E-04 3.55E-03 9.58E-06 BDL 1.27E-04 DLL 198-55-0 Perylene BDL 9.53E-04 7.98E-06 BDL 3.70E-08 BDL 3.23E-05 BDL 85-01-8 Phenanthrene 3.49E-04 3.63E-04 3.31E-07 BDL 1.26E-04 BDL 108-95-2 Phenol DLL 7.60E-04 1.36E-02 2.35E-07 2.81E-04 106-50-3 1,4-Phenylenediamine BDL 9.53E-03 4.21E-03 BDL 1.68E-07 BDL 1.05E-03 BDL 129-00-0 Pyrene 5.40E-04 1.00E-04 BDL 8.40E-08 BDL 1.47E-04 BDL 95-53-4 o-Toluidine BDL 9.53E-04 4.76E-04 BDL 4.70E-08 BDL 1.16E-04 BDL 7664-41-7 Ammonia 630-08-0 Carbon Monoxide 1.11E+02 1.73E+01 8.90E-01 7782-50-5 Chlorine

Carbonyl Sulfide 6.60E+00 BDL 3.08E-02 BDL 6.44E-02 BDL Carbon Disulfide BDL 9.11E-02 BDL 3.90E-02 BDL 6.51E-03 BDL Total Hydrocarbons 1.86E+01 DLL 1.00E-02 2.38E-02 DLL 4.00E-02 DLL Hydrogen Sulfide 5.42E-01 BDL 1.75E-02 BDL 1.42E-02 BDL 

67-56-1 Methanol BDL 4.52E-08 BDL* 4.91E-01 BDL 1.21E-02 74-82-8 Methane 3.25E+00 6.10E-04 4.05E-02 2.00E-02 DLL 74-84-0 Ethane BDL 2.70E-01 5.50E-03 BDL 6.17E-02 BDL 2.00E-02 BDL 75-69-4 Trichlorofluoromethane74-83-9 Bromomethane10102-43-9 Nitric Oxide 

Sulfur Dioxide Total Reduced Sulfur 7.24E+00 2.40E-02 BDL 1.31E-01 BDL 

Organic Condensible ParticulateFilterable ParticulateFilterable PM2.5Total PM2.5
Summary of SRU Emission Test Report Data

LA3C0610 - Marathon 

Garyville, LA

DL lb/hr

T

Co

S

CAS # Compound DL lb/hr DL 

TX3B1160 - ExxonMobil 

Baytown, TX

WA5A1410 - Shell Oil 

Puget Sound Refinery 

Anacortes, WA

TX3B1250 - Valero 

Port Arthur, TX

Detection 

Limit (DL) DL lb/hr lb/hr

*third run had negative value, this average is the 1st and