U.S. Department of the Interior

Minerals Management Service 

Gulf of Mexico OCS Region 

OCS Study 

MMS 2004-070 

User’s Guide for the 2005 

Gulfwide Offshore Activities 

Data System (GOADS-2005) 

Final Report 

Authors 

Darcy Wilson 

Andy Blackard 

Stephanie Finn 

Eastern Research Group, Inc. 

Morrisville, North Carolina 

Brian Boyer 

COMM Engineering, Inc. 

Lafayette, Louisiana 

Prepared under MMS Contract 

1435-01-04-CT-31021 

by 

Eastern Research Group, Inc. 

1600 Perimeter Park Drive 

Morrisville, North Carolina 27560 

Published by 

New Orleans

October 2004 
iii 

DISCLAIMER 

This User’s Guide was prepared under contract between the Minerals Management Service 

(MMS) and Eastern Research Group, Inc. This User’s Guide has been technically reviewed by 

the MMS and approved for publication. Approval does not signify that the contents necessarily 

reflect the views and policies of the MMS, nor does mention of trade names or commercial 

products constitute endorsement or recommendation for use. It is, however, exempt from review 

and compliance with the MMS editorial standards. 

REPORT AVAILABILITY 

Extra copies of this report may be obtained from the Public Information Office (Mail Stop 5034) 

at the following address: 

U.S. Department of the Interior 

Minerals Management Service 

Gulf of Mexico OCS Region 

Public Information Office (MS 5034) 

1201 Elmwood Park Boulevard 

New Orleans, Louisiana 70123-2394 

Telephone: (504) 736-2519 or 

1-800-200-GULF 

CITATION 

Suggested citation: 

Wilson, D., A. Blackard, S. Finn, and B. Boyer. 2004. User’s Guide for the 2005 Gulfwide 

Offshore Activities Data System (GOADS-2005): Final Report. U.S. Dept. of the 

Interior, Minerals Management Service, Gulf of Mexico OCS Region, New Orleans, LA. 

OCS Study MMS 2004-XXX. 90 pp. 
v 

TABLE OF CONTENTS 

Section Page

LIST OF FIGURES ...................................................................................................................... vii 

1. INTRODUCTION ........................................................................................................... 1-1 

1.1 Principles of Use and System Requirements......................................................... 1-1 

1.2 Installation ............................................................................................................. 1-1 

2. USING THE 2005 GULFWIDE OFFSHORE ACTIVITIES DATA SYSTEM 

(GOADS-2005)................................................................................................................ 2-1 

2.1 Starting and Exiting GOADS-2005....................................................................... 2-1 

2.2 Creating and Editing Data ..................................................................................... 2-8 

2.2.1 Creating and Editing Structure Data ........................................................ 2-8 

2.2.2 Creating and Editing Equipment Data ................................................... 2-13 

2.3 Quality Control Tests .......................................................................................... 2-15 

2.4 Saving and Backing Up Work............................................................................. 2-16 

2.5 Setting Status of Facilities and Equipment.......................................................... 2-17 

2.6 Finding Help and Extra Information ................................................................... 2-17 

3. UPON SURVEY COMPLETION................................................................................... 3-1 

3.1 How, When, and Where to Deliver Data Files...................................................... 3-1 

3.2 Failed Quality Control Tests ................................................................................. 3-1 

3.3 QA Summary Form............................................................................................... 3-1 

APPENDIX A: HELP TEXT FILES......................................................................................... A-1 

A.1 User Information ................................................................................................ A-3 

A.2 Structure Information ......................................................................................... A-4 

A.3 Amine Gas Sweetening Unit .............................................................................. A-6 

A.4 Boiler/Heater/Burner......................................................................................... A-10 

A.5 Diesel or Gasoline Engine ................................................................................ A-13 

A.6 Drilling Rig ....................................................................................................... A-16 

A.7 Combustion Flare.............................................................................................. A-18 

A.8 Fugitives............................................................................................................ A-20 

A.9 Glycol Dehydrator Unit .................................................................................... A-23 

A.10 Loading Operation ............................................................................................ A-28 

A.11 Losses From Flashing ....................................................................................... A-30 

A.12 Mud Degassing ................................................................................................. A-32 

A.13 Natural Gas Engine ........................................................................................... A-33 
vi 

TABLE OF CONTENTS (CONTINUED) 

Page

A.14 Natural Gas Turbine.......................................................................................... A-36 

A.15 Pneumatic Pumps.............................................................................................. A-39 

A.16 Pressure/Level Controllers................................................................................ A-41 

A.17 Storage Tank ..................................................................................................... A-42 

A.18 Cold Vent.......................................................................................................... A-46 

APPENDIX B: GOADS-2005 QA SUMMARY FORM DATA FIELDS ...............................B-1 
vii 

LIST OF FIGURES 

Figure Page

2-1 Populating GOADS-2005.................................................................................................. 2-2 

2-2 New User Screen ............................................................................................................... 2-3 

2-3 GOADS-2005 Main Window............................................................................................ 2-3 

2-4 GOADS-2005 Main Menu ............................................................................................... 2-5 

2-5 GOADS-2005 Help Menu ................................................................................................ 2-6 

2-6 GOADS-2005 Import Screen ............................................................................................ 2-7 

2-7 GOADS-2005 Export Screen ............................................................................................ 2-8 

2-8 New Structure Dialog Box ................................................................................................ 2-9 

2-9 Structure Screen in Description Edit Mode..................................................................... 2-10 

2-10 Structure Screen in Activity Edit Mode .......................................................................... 2-11 

2-11 Sales Gas Screen ............................................................................................................. 2-12 

2-12 New Equipment Dialog Box ........................................................................................... 2-14 

2-13 QC Results Tab ............................................................................................................... 2-16 

3-1 QA Summary Form Screen ............................................................................................... 3-2 
1-1

1. INTRODUCTION 

The Minerals Management Service (MMS) mandated that offshore operators in the Gulf 

of Mexico participate in an annual survey program for the years 2000 and 2005. For 2000, MMS 

collected information regarding offshore operations. The purpose of the survey was to assist the 

MMS in constructing an emission inventory for the entire Gulf of Mexico. For the 2000 

inventory effort, MMS funded the development of the Gulfwide Offshore Activities Data System 

(GOADS-2000) software in order to assist offshore operators in complying with the MMS 

mandate. The GOADS software assists users in recording information regarding emissionsrelated offshore activities and generates computer data files that can be delivered to the MMS. 

For the 2005 inventory effort, significant improvements have been made to the original software; 

the new version is GOADS-2005. The GOADS-2005 software will be used to record 

information regarding emissions-related offshore activities for calendar year 2005. 

For 2005, the GOADS-2005 software has been reengineered to simplify data entry to 

focus on activities that change monthly. The primary difference between the 2000 GOADS and 

the GOADS-2005 is that platform descriptive data as well as the equipment descriptive data only 

need to be entered once, not every month. The GOADS-2005 still includes the QA Summary 

Form that needs to be printed out and submitted with the activity data file(s). 

1.1 PRINCIPLES OF USE AND SYSTEM REQUIREMENTS 

The GOADS-2005 works on IBM-compatible personal computers (PCs) that are 

equipped with the Microsoft Windows® 98, NT, or XP operating systems. The user should 

possess a modest familiarity with the Windows operating environment and should understand a 

few of its common features, such as point-and-click, file management, menu-driven selection, 

and text boxes. 

1.2 INSTALLATION 

The GOADS-2005 distribution pack includes this User’s Guide; lookup tables with MMS 

information such as operator IDs and other structure data, and an Installation CD (GOADS2005). The lookup tables and Installation CD are necessary to complete the installation of 

GOADS-2005. 

Complete the following steps to install GOADS-2005: 

1. Insert the Installation CD into the CD-ROM (assumed here to be the d:\ drive). 

2. Click from the Windows Taskbar, then select . 

3. Type d:\GOADS-2005.msi (CD ROM) and click OK . 
1-2

4. Follow the instructions that appear on each successive screen, and click Finish to 

complete the installation. 

During the installation process, the setup program may ask you to reboot your 

machine one or more times (depending upon the files currently installed on your PC). 

You should reboot when asked. 

5. Remove the Installation CD. 

6. The Installation CD should be stored in a safe place. 
2-1

2. USING THE 2005 GULFWIDE OFFSHORE ACTIVITIES 

DATA SYSTEM (GOADS-2005) 

The GOADS-2005 software assists users in completing monthly surveys covering air 

emissions-related activities that are associated with offshore facilities. GOADS-2005 queries the 

user regarding emissions-related operating data, saves the data on the user’s PC, and guides the 

user to create copies of the data on floppy disks or compact disks (CDs) for backup or delivery to 

the MMS. Figure 2-1 presents a flowchart that describes the steps in populating the GOADS2005 database. 

• You should run GOADS-2005 in order to enter new operating data for each 

month. For example, if production or throughput volumes change from month-tomonth, this new information should be entered for every month. Parameters that 

remain constant do not need to be entered every month. 

• A saved data set corresponding to one month is called a “survey” or a “monthly 

survey.” Upon creating a survey, you should enter information that represents 

your offshore facility and all emissions-producing equipment on the facility. 

GOADS-2005 provides a “fill-in-the-blank” approach in order to generate 

structure, equipment, and production/throughput data. 

• As you enter data, GOADS-2005 performs a number of automatic error checks. 

If an error is suspected, you will be reminded and may be asked to correct the 

error or provide comments in a text box. After the data are submitted, MMS will 

attempt to reconcile missing or unusual data by reviewing the comments or 

contacting you by telephone. GOADS-2005 performs the following types of error 

checks: 

þ Completeness – to identify missing data entries 

þ Range – to determine when data entries fall outside of typical ranges 

þ Consistency – to determine whether data entries are consistent with one 

another 

þ Month-to-month – to determine whether information that typically varies by 

month has been reviewed and edited appropriately or to flag items that 

change radically from one month to the next 

2.1 STARTING AND EXITING GOADS-2005 

To start GOADS-2005, click ÿ Start from the Windows taskbar, then select 

Programs4| GOADS-2005. Upon starting GOADS-2005 for the first time, the “New User” 

screen will appear (Figure 2-2). At this point you must fill in the requested contact information 

in order to proceed. You will only need to complete this screen once. The next time you run 

GOADS-2005, it will NOT appear. Instead, the Main Window (Figure 2-3) will appear. 

2-3

Figure 2-2. New User Screen. 

The “New User” screen asks for “MMS Company No.” It is extremely important that 

you use the correct MMS Company Number. It can be found in a separate document stored on 

the Installation CD. This ID cannot be changed once entered. The inventory year is 2005. 

Figure 2-3. GOADS-2005 Main Window. 
2-4

The GOADS-2005 program has a new feature that distinguishes between static 

(descriptive) and dynamic (activity) data. This feature is designed to reduce data entry time by 

requesting static platform and equipment data only once (as opposed to every month). The title 

bar at the top of the screen indicates the current edit mode. When you select Edit > Change to 

Description Edit Mode from the main menu, or Edit Description Data on the lower left side 

of any screen, the program allows you to enter/edit data that do not change from month to month. 

To edit the descriptive data, select Edit Data on the lower right side of any screen. 

When you select Edit > Change to Activity Edit Mode from the main menu, or 

 Edit Activity Data on the lower left side of any screen, the program allows you to enter/edit 

monthly activity data that are likely to change from month to month. In this mode you see the 

descriptive data, but it cannot be edited. Edit the activity data, select Edit Data on the lower 

right side of any screen. 

From the Main Window (Figure 2-4), you may perform the following tasks: 

• Export/import GOADS-2005 files. GOADS-2000 platform and equipment 

descriptions will also be made available as GOADS-2005 Import files.

• Edit participant identification information (initially entered during program 

installation). 

• View, create new, edit, save, or delete data for monthly surveys, facilities, or 

equipment. 

• Run QC on a selected monthly survey, platform, of piece of equipment. 

• Export the structure/equipment descriptions to a spreadsheet. 

• Print the current screen. 

• Directly access the MMS GOADS Internet Site with Frequently Asked Questions 

(FAQs) and this User’s Guide (Figure 2-5). 

• Export a saved monthly survey or entire annual database to a floppy disk or CD 

for backup or delivery to MMS. 

• Print the QA Summary Form (must be printed when file is submitted to MMS; 

highlights key data that are missing) (see Section 3.3).
2-5

Figure 2-4. GOADS-2005 Main Menu. 
2-6

Figure 2-5. GOADS-2005 Help Menu. 

Use one of the following ways to exit the program: (1) click File | Exit Program from 

the Main Window menu, or (2) click the x symbol at the upper right to close the program 

window. When you close the program window or select File | Exit Program from the main 

menu, a message box will appear asking if you would like to compact the database. As you add 

more data to GOADS-2005, we recommend that you say “YES” when prompted. Over time, the 

database can grow significantly, especially if you run the QA summary report multiple times. 

If you have never used GOADS-2000, you can skip this section and go directly to 

Section 2.2 “Creating and Editing Data.” If you have used GOADS-2000, you should read this 

section before proceeding. 

If you were a GOADS-2000 user, you can import your GOADS-2000 platform and 

equipment descriptive data into GOADS-2005 before proceeding (described below). This 

platform and equipment descriptive data may be slightly different from your original submittal to 

MMS; it has undergone extensive QA/QC by MMS and may have been adjusted as a result. You 

can and must edit the descriptive data after importing it to reflect any structural or 

equipment changes since 2000. 
2-7

GOADS-2005 has a new platform data import/export feature. The 2000 data are 

provided in this format so that they may be imported as if they had been exported in the same 

format. 

To import the GOADS-2000 data, select File|Import GOADS-2005 Structure data. 

(Named as such because the 2000 data are in the GOADS-2005 required structure.) A dialog 

box will appear which lists any descriptive data that have been previously imported. The first 

time you import a file, this list will be blank. Enter the path and file name of the GOADS-2000 

file you wish to import in the box labeled “Import File Path and Filename.” You can also use the 

“Browse” button to find the file you wish to import (Figure 2-6). After you have selected a file, 

select Import Selected Structures . The GOADS-2000 file will be imported (this may take a 

few seconds) as January 2005. When the import process is complete, the survey name and its 

associated structures and equipment types should appear in the Navigation tree on the left of the 

screen. You must repeat this import process for all of your GOADS-2000 files (if you received 

multiple 2000 files). 

Figure 2-6. GOADS-2005 Import Screen. 

You can also use the File|Import GOADS-2005 Structure data feature to upload data 

for a structure that has been purchased in 2005 from another company. The User ID in the 

imported file will automatically be updated to your User ID. This process will import descriptive 

as well as monthly activity data, as available. The previous operator of that structure uses the 

corresponding File|Export GOADS-2005 Structure data to create this file (Figure 2-7). 
2-8

Figure 2-7. GOADS-2005 Export Screen. 

2.2 CREATING AND EDITING DATA 

2.2.1 Creating and Editing Structure Data 

In order to create new structure data, from the 

Description Edit Mode, select Edit | New Structure from the 

Main Window menu. 
2-9

A New Structure Dialog Box will appear to request vital identification data for the 

structure (Figure 2-8). See Appendix A for guidance on entering these data correctly. 

Figure 2-8. New Structure Dialog Box. 

Enter the information and click OK . An icon for the new structure will appear in the 

Navigation Tree on the left side of the Main Window. Highlight the new structure icon to view 

the Structure Screen. 

Figures 2-9 and 2-10 show the Structure screen in Description Edit Mode and Activity 

Edit Mode. 

In the Description Edit Mode, the Structure Screen contains three tabs: General 

Information, Sales Gas, and QC Results. General Information shows contact and other general 

information for the current structure. Note that production is the quantity of petroleum that was 

extracted from the ground at the structure; throughput is the total quantity of petroleum handled 

at the structure, including petroleum extracted at another location and transferred to the structure. 

Sales Gas presents the volumetric composition of the natural gas processed at the structure and 

transferred off the structure (Figure 2-11). QC Results tabulates any quality control errors that 

may be encountered as data are completed for the current structure and its associated equipment 

(see Section 2.3). In the Activity Edit Mode, the Sales Gas tab is not visible because it contains 

data that do not change from month to month. 
2-10

Figure 2-9. Structure Screen in Description Edit Mode. 
2-11

Figure 2-10. Structure Screen in Activity Edit Mode. 

The following buttons are available on the Structure Screen from either the Description 

Edit Mode or the Activity Edit Mode: 

• Edit Data launches Edit Mode so that changes or new data may be entered. 

• Run QC runs quality control checks on all data saved for the current structure 

and its associated equipment. 

• Print Screen to print the current screen for review. 
2-12

Figure 2-11. Sales Gas Screen. 

Four additional buttons become available in the Activity Edit Mode: 

• Save (only available in Edit Mode) incrementally saves work and returns to 

Edit Mode. 

• Cancel (only available in Edit Mode) discard recent changes and close Edit 

Mode. 

• End Edit & Save (only available in Edit Mode) saves changes and exits Edit 

Mode. 

• No Emissions to Report to flag a structure as inactive for a given month. 

From the Activity Edit Mode, new monthly surveys can be created. An icon for the new 

survey will appear in the Navigation Tree on the left side of the Main Window. Previously 

entered equipment descriptive data (see Section 2.2.2) will automatically be copied into the new 

monthly survey. Highlight the survey icon to view the Survey Screen. The Survey Screen 

contains only one tab: QC Results. QC Results tabulates any quality control errors encountered 

during data entry (see Section 2.3). 
2-13

2.2.2 Creating and Editing Equipment Data 

GOADS-2005 queries for information regarding the following sources of emissions: 

• Amine gas sweetening unit 

• Boiler/heater/burner 

• Drilling rig 

• Combustion flare 

• Fugitive losses 

• Gasoline/diesel engine 

• Glycol dehydrator 

• Loading operation 

• Losses from flashing 

• Mud degassing 

• Natural gas engine 

• Natural gas turbine 

• Pneumatic pumps 

• Pressure/level controllers 

• Storage tank 

• Cold vent 

In order to create new equipment data, go to the Navigation Tree on the left side of the 

Main Window and select the appropriate structure (into which the new equipment data will be 

placed). Select Edit | New Equipment from the Main Window menu. 

A New Equipment Dialog Box will request vital identification data for the equipment, 

such as equipment ID number and equipment type (e.g., flares, turbines, etc.) (Figure 2-12). 

Enter the information, then click OK . An icon for the new equipment will appear in the 

Navigation Tree on the left side of the Main Window and a new screen will automatically open, 

specific to the equipment type entered. You can return to this equipment screen at any time by 

highlighting the equipment. 
2-14

Figure 2-12. New Equipment Dialog Box. 

Depending on the equipment type and the edit mode, the equipment screen will contain 

two to four tabs: General Information, Exhaust/Ventilation System, Control Equipment, and QC 

Results. General Information shows operating parameters for the current equipment. From the 

Description Edit Mode, you can populate/edit static equipment description data that do not 

change from month to month. When you create a new monthly survey, these data are 

automatically copied. From the Activity Edit Mode, you are prompted to enter activity data that 

can vary from month to month. These data are not copied automatically when a new monthly 

survey is created. 

Exhaust/Ventilation System presents variables that are related to equipment exhaust 

systems; this screen is not visible when you are in Activity Edit Mode. Control Equipment

permits users to describe installed pollution control devices that were not accounted for on the 

General Information tab; this screen is also not visible when you are in Activity Edit Mode. QC 

Results tabulates any quality control errors that may be encountered as data are completed for the 

equipment (see Section 2.3). 

In Edit Activity Data you can select No Emissions to Report for a given month 

for the entire platform or specific pieces of equipment. This is an important new feature; MMS 

will assume that the platform or equipment are NOT operating for months flagged as such, 

regardless of other values that may be populated for the month. The user does not have to fill in 

the forms with zeros for inactive structures or equipment, merely check this box. Records 

flagged as no emissions to report will not be QC checked in the inventory development process. 
2-15

If you do NOT select No Emissions to Report MMS will assume that the platform or 

equipment is operating that month, and surrogate data will be used to develop emission estimates 

if necessary. 

MMS will also assume that activity values that are left blank (Null) should be populated 

with surrogate data. 

The following buttons are available on the Description Edit Mode and Activity Edit 

Mode Equipment Screens: Activity values that are populated with zeros will NOT be populated 

with surrogate data. 

• Edit Data launches Edit Mode so that changes or new data may be entered. 

• Run QC runs quality control checks on data for the current equipment. 

• Print Screen to print the current screen for review 

Four additional buttons become available only in Activity Edit Mode: 

• Save (only available in Edit Mode) incrementally saves work and returns to 

Edit Mode. 

• No Emissions to Report to flag equipment as inactive for a given month. 

• Cancel (only available in Edit Mode) discard recent changes and close Edit 

Mode. 

• End Edit & Save (only available in Edit Mode) saves changes and exits Edit 

Mode. 

2.3 QUALITY CONTROL TESTS 

After you complete and save data, GOADS-2005 automatically runs a series of quality 

control (QC) checks before saving the data. If any entries are incomplete, atypical, or suspect, a 

pop-up message will appear, and a list of QC errors will appear on the QC Results tab 

(Figure 2-13). You may choose to return and correct the problems, to override QC check(s) (a 

comment is required), or to ignore message(s) and save changes anyway. If QC problems 

remain uncorrected and uncommented when the data are submitted, MMS staff members will 

attempt to reconcile missing, atypical, or suspect data by reviewing the comments or contacting 

you by telephone. 
2-16

Figure 2-13. QC Results Tab. 

2.4 SAVING AND BACKING UP WORK 

It is very important to periodically store data to a secure location other than 

the hard drive (such as a floppy disk or CD). This practice minimizes data 

loss in the event of a computer failure or other mishap. 

After you complete and save data, the entries are saved to a working file on the hard 

drive1. (In order to discard changes, click Cancel instead of End Edit & Save .) In order to 

store data in an alternate location, select File|Export GOADS-2005 Inventory Database on the 

main menu. A dialog box will appear which will allow you to enter a File Path and Filename or 

browse to the location in which you wish to create the file. After entering the path and file name, 

hit “OK.” You can then copy the file you have created to CD, floppy disk or zip disk. 

 

1 The working file is located at C:\Program Files\GOADS-2005\GOADS.mdb. The working file should be backed 

up periodically by copying to a secure location. 
2-17

2.5 SETTING STATUS OF FACILITIES AND EQUIPMENT 

If equipment or an entire structure becomes inactive for an entire monthly survey period, 

the change in status should be noted by selecting No Emissions to Report but only for the 

affected survey period(s). Note that when a piece of equipment or a structure is active for any 

part of a survey period, its status should NOT be set to No Emissions To Report. 

Open an affected survey in the Navigation Tree on the left side of the Main Window. 

(Double-click the survey icon, or click the + symbol immediately to its left.) Select the affected 

structure or equipment, and click Edit Data in order to launch Edit Mode. Use the Set Status 

data entry boxes to change the status. Indicate the new status and its effective date and click 

End Edit & Save in order to record the change in status. 

2.6 FINDING HELP AND EXTRA INFORMATION 

Each screen has an associated help text file that contains technical details about the 

required data entries, such as definitions, quality control checks, typical values, estimation 

methods, etc. Access help by pressing the F1 key. You can also go to the Help menu and 

select “current screen” to view the help file for the current screen or select “other screen” and see 

a list of all available help files. Help files are reprinted in Appendix A of this User’s Guide. In 

addition, you can directly access the MMS GOADS Internet Site with Frequently Asked 

Questions (FAQs) and this User’s Guide from within GOADS-2005. 

The main GOADS-2005 webpage is at: 

www.gomr.mms.gov/homepg/regulate/environ/airquality/goad.html 

For information on how to resolve technical problems or other difficulties, go to: 

www.gomr.mms.gov/homepg/regulate/environ/airquality/faqgoad.html 
3-1

3. UPON SURVEY COMPLETION 

3.1 HOW, WHEN, AND WHERE TO DELIVER DATA FILES 

When the entire inventory is completed (12 monthly surveys), it should be exported to 

your hard-drive and then copied to CD, zip disk, or floppy disk for submittal to MMS. 

To export the inventory, select File|Export GOADS-2005 Inventory Database on the 

main menu. A dialog box will appear which will allow you to enter a File Path and Filename or 

browse to the location in which you wish to create the file. After entering the path and file name, 

click “OK.” You can then copy the file you have created to the appropriate medium. 

The MMS should receive all 2005 data files before April 21, 2006. Floppies or CDs 

should be placed in cardboard mailing envelopes and mailed to the address below. 

Ms. Holli Ensz 

Minerals Management Service 

Office of Leasing and Environment (MS 5433) 

1201 Elmwood Park Blvd. 

New Orleans, LA 70123-2394 

Phone: (504) 736-2536 

E-Mail: holli.ensz@mms.gov

3.2 FAILED QUALITY CONTROL TESTS 

When saving data to the floppy drive or CD for delivery to MMS, GOADS-2005 stores 

the results of all QC tests. If the user returns to GOADS-2005 in order to address QC problems, 

the error messages may be reviewed from the QC Results tab on the Survey Screen. If you 

choose to ignore errors and submit the data anyway, MMS staff members will attempt to 

reconcile the problems by reviewing comments or contacting you by telephone. 

3.3 QA SUMMARY FORM 

From the Main Window (Figure 2-4), the File | Print Annual Inventory QA Summary 

Form may be selected at any time to view and obtain a hard-copy printout of key missing and 

inconsistent data elements (Figure 3-1). These data elements are critical if MMS is to develop 

emission estimates for the equipment listed. 
3-2

Figure 3-1. QA Summary Form Screen. 

In addition, a hard-copy printout of the QA Summary Form must be submitted along with 

your data files to facilitate review by MMS staff members. The data files may be directly 

returned to you if the QA Summary Form indicates missing or inconsistent key data elements. 

Appendix B presents the key data elements in the QA Summary Form. 
APPENDIX A 

HELP TEXT FILES 
A-3 

A.1 USER INFORMATION 

A.1.1 General Information Tab 

GOADS-2005 Registered User – Identifies the person to whom GOADS-2005 is registered, an 

employee of the company that owns structures in the outer continental shelf. This should be the 

primary contact person who is responsible for submitting surveys to the MMS. The following 

contact information should be provided: 

• Name 

• Phone number 

• Fax number 

• Email address (optional) 

• Company name 

• Street address 

• City 

• State 

• Zip code 
A-4 

A.2 STRUCTURE INFORMATION 

A.2.1 General Information Tab 

MMS Structure ID - A unique identifier code that is assigned to an offshore structure prior to its 

construction by the MMS. This identifier code is tracked in the Minerals Management Service’s 

records. 

MMS Complex ID - A unique identifier code that is assigned to a group of related structures 

prior to construction by the MMS. This identifier code is tracked in the Minerals Management 

Service’s records. 

Area Name – Designated name of the geographic area in which the structure is located. 

Block Number – Designated number of the geographical block in which the structure is located. 

Name - A name or identifier that denotes a structure within its Area/Block. 

Lease Number - The lease number issued by the Minerals Management Service for the 

construction and operation of an offshore structure. 

Longitude (decimal degrees) – An east-west coordinate that defines the position of an offshore 

structure. Specify to at least four decimal places. 

Latitude (decimal degrees) – An north-south coordinate that defines the position of an offshore 

structure. Specify to at least four decimal places. 

Distance to shore (miles) - The distance to the nearest U.S. shoreline. Specify to the nearest 

1/10 mile. 

Structure contact information - The name, phone number, and/or email address of an individual 

who may be contacted with questions regarding the survey data, such as the structure’s 

supervising engineer. 

Production - Describes the natural gas or oil products that were extracted at this structure during 

the specific survey period. 

• Crude Oil Production (barrels): The quantity of crude oil extracted at this 

structure. 

• Natural Gas Production (million standard cubic feet): The quantity of natural gas 

extracted at this structure, volume adjusted to standard temperature and pressure 

(60 degrees Fahrenheit, 1 atmosphere). 

Throughput - The total volume of natural gas or oil products handled at the current structure 

during the survey period, including production volumes and volumes transferred via pipeline 

from another location. 
A-5 

• Crude Oil Throughput (barrels): The total quantity of crude oil handled at the 

current structure. 

• Natural Gas Throughput (million standard cubic feet): The total quantity of 

natural gas handled at the current structure, volume adjusted to standard 

temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Total fuel usage - The quantity of fuel consumed at this structure during the specific survey 

period. 

• Natural gas fuel usage (thousand standard cubic feet) - The quantity of natural gas 

consumed at this structure. 

• Gasoline usage (gallons) - The quantity of gasoline consumed at this structure. 

• Diesel fuel usage (gallons) - The quantity of diesel fuel consumed at this 

structure. 

No Emissions to Report - Indicates the status of the structure for the specific survey period. 

"No Emissions to Report” - Indicates that the structure and all of its equipment were unused 

for the entire month-long survey period. The Enter Edit Mode button will be disabled for all 

equipment belonging to the structure, and all equipment will be treated as inactive. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.2.2 Sales Gas Data 

Sales Composition (mole percent) – The volumetric composition (percent by volume = mole 

percent) of the natural gas processed at the structure and transferred off the structure. If a 

constituent is not present, enter 0. The composition should sum to 100%. 

A.2.3 QC Results Tab 

Error Source – List of input variables, structures, and/or equipment for this survey that have been 

flagged with QC error messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-6 

A.3 AMINE GAS SWEETENING UNIT 

A.3.1 General Information Tab 

Processed throughput (million standard cubic feet) – The total volume of natural gas processed 

by this amine unit during the specific monthly survey period, volume adjusted to standard 

temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Hours operated – The total number of hours that this amine unit was in operation during the 

specific monthly survey period. 

Amine unit elevation (feet above mean sea level) – The elevation of the amine unit at its base 

above mean sea level. 

Unprocessed natural gas concentrations (percent by volume) – The volumetric concentrations of 

constituents present in the unprocessed natural gas stream, including the following: 

• Hydrogen Sulfide 

• Methane (CH4) 

• Ethane (C2H6) 

• C3 Hydrocarbons (hydrocarbons with 3 carbon atoms in their molecular structure) 

• C4 Hydrocarbons 

• C5 Hydrocarbons 

• C6 Hydrocarbons 

• C7 Hydrocarbons 

• C8+ Hydrocarbons (hydrocarbons with 8 or more carbon atoms in their molecular 

structure) 

Specify emissions by model inputs or quantity emitted when uncontrolled (%) - Select model 

inputs if you do not have information on the uncontrolled quantity emitted. Proceed to the model 

inputs screen if the data are not available. 

Quantity emitted when uncontrolled (percent) – The mass percent emitted to the atmosphere of 

each constituent in the unprocessed natural gas stream, without accounting for any installed 

control equipment. Specify to the nearest 1/100 percent, if possible. If the data are not readily 

available, it is not mandatory that you enter this data. 

A.3.2 Model Inputs Tab 

Amine type – Indicates the type of amine used in this unit, monoethanolamine (MEA), 

diethanolamine (DEA), tertiaryethanolamine (TEA), methyldiethanolamine (MDEA), 

diglycolamine (DGA). 
A-7 

Unprocessed sour gas feed pressure (pounds per square inch gauge) – The pressure of the 

unprocessed sour gas feed. 

Unprocessed sour gas feed temperature (degrees Fahrenheit) – The temperature of the 

unprocessed sour gas feed. 

Equipped with a flash tank? (yes/no) – Indicates whether the system is equipped with a flash 

tank. 

Flash tank temperature (degrees Fahrenheit) – The temperature of the flash tank. 

Flash tank pressure (pounds per square inch gauge) – The pressure of the flash tank. 

Destination of flash gas – Indicates if the gas is vented to the atmosphere, routed to a separator, 

recycled to an absorber, or burned in a flare. 

Number of absorber trays – Indicates the number of absorber trays on this amine unit. 

Lean amine feed pressure (pounds per square inch gauge) – The pressure of the lean amine feed. 

Lean amine feed temperature (degrees Fahrenheit) – The temperature of the lean amine feed. 

Lean amine volumetric flowrate (gallons per minute) – The rate of amine circulation through the 

unit. 

Lean amine feed amine content (percent by weight) – The amine content of the lean amine feed. 

Lean amine feed H2S concentration (percent by volume) – The volumetric concentration of H2S 

present in the lean amine feed. 

Lean amine feed CO2 concentration (percent by volume) – The volumetric concentration of CO2 

present in the lean amine feed. 

No Emissions to Report – Indicates the status of the amine unit for the specific survey period. 

• "No Emissions to Report" - Indicates that the equipment was unused for the entire 

month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.3.3 Ventilation System Tab for Acid Gas from the Reboiler 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create a vent or flare before it will 

appear in the list (using the Edit|New Equipment menu). 
A-8 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The effective diameter of a process vent/flare. 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process 

vent/flare. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

Flare feed rate (standard cubic feet per hour) – The volumetric feed rate to a process flare. 

Combustion temperature (degrees Fahrenheit) – The combustion temperature of a process flare. 

Combustion efficiency (percent) – The combustion efficiency of a process flare, or the 

completeness of hydrocarbon conversion to carbon dioxide (as CO2). 

Installed control equipment – Indicates which common types of control devices are installed for 

this equipment. 

Condenser temperature (degrees Fahrenheit) – The operating temperature of a condenser 

installed as a control device. 

Condenser pressure (absolute pounds per square inch) – The operating pressure of a condenser 

installed as a control device. 

Sulfur recovery efficiency (percent) – The efficiency for a sulfur recovery unit that is installed as 

a control device (as a percent of total sulfur). 

A.3.4 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Ventilation System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Ventilation System Tab). 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices (other than those listed on the Ventilation System Tab). 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices (other than those listed on the Ventilation System Tab). 
A-9 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices (other than those listed on the Ventilation System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Ventilation System 

Tab). 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices (other than those 

listed on the Ventilation System Tab). 

A.3.5 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-10 

A.4 BOILER/HEATER/BURNER 

A.4.1 General Information Tab 

Equipment elevation (feet above mean sea level) – The elevation of a boiler/heater/burner, 

measured from mean sea level to its base. 

Hours operated – The total number of hours that this boiler/heater/burner was in operation during 

the specific monthly survey period. 

Fuel type – The type of fuel burned by the equipment. 

Fuel H2S content (parts per million by volume) – The concentration of hydrogen sulfide in 

gaseous fuel types. 

Fuel sulfur content (percent by mass) – The sulfur content in liquid fuel types. 

Fuel heating value (British thermal units/standard cubic feet) – The energy content of gaseous 

fuel types. 

Fuel heating value (British thermal units per pound) – The energy content of liquid fuel types. 

Max rated heat input (million British thermal units per hour) – The manufacturer’s maximum 

rated heat input rate. 

Average heat input (million British thermal units per hour) – The average heat input rate during 

operation this survey period. 

Max rated fuel usage (standard cubic feet per hour) – The maximum rate of gaseous fuel usage, 

volume adjusted to standard temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Average fuel usage (standard cubic feet per hour) – The average rate of gaseous fuel usage 

during operation this survey period, volume adjusted to standard temperature and pressure 

(60 degrees Fahrenheit, 1 atmosphere). 

Max rated fuel usage (pounds per hour) – The maximum rate of liquid fuel usage. 

Average fuel usage (pounds per hour) – The average rate of liquid fuel usage during operation 

this survey period. 

Total fuel used (thousand standard cubic feet) – Total gaseous fuel used during this survey 

period, volume adjusted to standard temperature and pressure (60 degrees Fahrenheit, 

1 atmosphere). If you do not monitor actual fuel use for a boiler, heater, or burner, a value may 

be calculated using: 

[Hours operated * average heat input (MMBtu/hr) * (106 Btu/MMBtu)]÷[fuel heating value 

(1,050 Btu/scf) * (1,000 scf/Mscf)]. 
A-11 

Total fuel used (pounds) – Total liquid fuel used during this survey period. If you do not monitor 

actual fuel use for a boiler, heater, or burner, a value may be calculated using: 

[Hours operated * average heat input (MMBtu/hr) * (106 Btu/MMBtu)]÷[fuel heating value 

(19,300 Btu/1b]. 

Note that the fuel heating value shown above is for diesel fuel. 

No Emissions to Report – Indicates the status of the boiler/heater/burner for the specific survey 

period. 

• "No Emissions to Report" – Indicates that the equipment was unused for the 

entire month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.4.2 Exhaust System Tab 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of the exhaust outlet. 

Exit velocity (feet/second) – The exit velocity of emissions through the exhaust outlet. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

exhaust outlet. 

Outlet orientation (degrees) – The deviation of the exhaust outlet from vertically upward. 

0 indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

Emission controls – Indicates which common types of control devices are installed for this 

equipment. 

A.4.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Exhaust System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Exhaust System Tab). 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices (other than those listed on the Exhaust System Tab). 
A-12 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Exhaust System 

Tab). 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices (other than those 

listed on the Exhaust System Tab). 

A.4.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-13 

A.5 DIESEL OR GASOLINE ENGINE 

A.5.1 General Information Tab 

Engine elevation (feet above mean sea level) – The elevation of an engine, measured from mean 

sea level to its base. 

Hours operated – The total number of hours that this engine was in operation during the specific 

monthly survey period. 

Fuel type – The type of fuel burned by the equipment. 

Fuel sulfur content (percent by mass) – The sulfur content in liquid fuel types. 

Fuel heating value (British thermal units per pound) – The energy content of liquid fuel types. 

Max rated horsepower (horsepower) – The manufacturer’s maximum rated horsepower output. 

Operating horsepower (horsepower) – The operating horsepower during operation this survey 

period. 

Max rated fuel usage (British thermal units per horsepower-hour) – The manufacturer’s 

maximum rate of fuel usage. 

Average fuel usage (British thermal units per horsepower-hour) – The average rate of fuel usage 

during operation this survey period. 

Total fuel used (gallons) – Total liquid fuel used during this survey period. If you do not 

monitor actual fuel use for an engine, a value may be calculated using: 

[Hours operated * average fuel usage (Btu/hp-hr) * operating horsepower]÷[fuel heating value 

(19,300 Btu/lb) * (7.05 lbs/gal)]. 

Note that the fuel heating value and fuel density (7.05 lbs/gal) shown above are for diesel fuel. 

No Emissions to Report - Indicates the status of the engine for the specific survey period. 

• "No Emissions to Report" - Indicates that the equipment was unused for the entire 

month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 
A-14 

A.5.2 Exhaust System Tab 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of the exhaust outlet. 

Exit velocity (feet/second) – The exit velocity of emissions through the exhaust outlet. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

exhaust outlet. 

Outlet orientation (degrees) – The deviation of the exhaust outlet from vertically upward. 0 

indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

A.5.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Exhaust System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Exhaust System Tab). 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices (other than those listed on the Exhaust System Tab). 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Exhaust System 

Tab). 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices (other than those 

listed on the Exhaust System Tab). 
A-15 

A.5.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-16 

A.6 DRILLING RIG

A.6.1 General Information Tab 

Hours operated – The number of hours that a drilling rig was present and working at this 

structure. 

Total diesel fuel usage (gallons) – The total diesel fuel used by the drilling rig during the survey 

period. 

Total gasoline fuel usage (gallons) – The total gasoline fuel used by the drilling rig during the 

survey period. 

Total natural gas fuel usage (thousand standard cubic feet) - The total natural gas used by the 

drilling rig during the survey period, volume adjusted to standard temperature and pressure 

(60 degrees Fahrenheit, 1 atmosphere). 

No Emissions to Report – Indicates the status of the drilling rig for the specific survey period. 

• "No Emissions to Report" - Indicates that the drilling rig was absent for the entire 

month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.6.2 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether controls are installed. 

Description – If present, a description of other control devices is required. 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices. 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices. 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices. 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices. 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices. 
A-17 

A.6.3 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-18 

A.7 COMBUSTION FLARE 

A.7.1 General Information Tab 

Note that flared emissions are combusted. If emissions are not combusted, create a Cold Vent 

record. 

Hours operated, including upsets – The total number of hours that the flare was operated during 

the survey period, including periods of upset flaring. 

Volume flared (thousand standard cubic feet), including upsets – The total volume of gas flared 

during the survey period, excluding periods of upset flaring, volume adjusted to standard 

temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Flare gas H2S Concentration (parts per million by volume) – The concentration of hydrogen 

sulfide present in the flare feed gas. 

Is there a continuous pilot? (yes/no) – Indicates whether the flare stack is equipped with a 

continuos pilot light. 

Pilot fuel feed rate (thousand standard cubic feet per day) – The feed rate of natural gas to a 

continuous pilot light. 

Flare combustion efficiency (percent) – The flare combustion efficiency, or the completeness of 

hydrocarbon conversion to carbon dioxide (as CO2). 

Smoking condition – A qualitative assessment of the level of smoke emitted from the flare 

• None (Soot emissions are approximately 0 pounds per million British thermal 

units of flare gas consumed.) 

• Light (Soot emissions are approximately 40 pounds per million British thermal 

units of flare gas consumed.) 

• Medium - (Soot emissions are approximately 177 pounds per million British 

thermal units of flare gas consumed.) 

• Heavy - (Soot emissions are approximately 274 pounds per million British 

thermal units of flare gas consumed.) 

Stack outlet elevation (feet above mean sea level) – The elevation of the flare stack outlet above 

mean sea level. 

Stack inner diameter (inches) – The effective diameter of the flare stack at its outlet. 

Average exit velocity (feet per second), excluding upsets – The average exit velocity of flare 

feed gas at the flare stack outlet during the survey period, excluding periods of upset conditions. 
A-19 

Average combustion temperature (degrees Fahrenheit) – The average flare combustion 

temperature during the survey period. 

Stack orientation (degrees) - The deviation of the stack outlet from vertically upward. 0 

indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

No Emissions to Report – Indicates the status of the flare for the specific survey period. 

• "No Emissions to Report" - Indicates that the flare was unused for the entire 

month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.7.2 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-20 

A.8 FUGITIVES 

A.8.1 General Information Tab 

Stream type – Indicates the type of process stream handled by the set of components to be 

inventoried. (Components for different process streams at the same structure should be 

inventoried separately.) 

• Light oil (API gravity ≥ 20°API) 

• Heavy oil (API gravity<20°API) 

• Oil/water mixture 

• Oil/water/gas mixture 

• Natural gas 

• Natural gas liquids 

Facility Size – Indicates a rough estimate of the total count of all components at this facility that 

handle the selected stream type. 

Average VOC weight percent of fugitives – The average VOC content of fugitive emissions for 

the inventoried components and the selected stream type. You may find it beneficial to use the 

following information as a starting point. 

Speciation Fractions for Total Hydrocarbon (THC) Emissions By Stream Type 

THC Fraction Gas Light Oil 

(≥ 20 API Gravity)

Heavy Oil 

(<20 API Gravity) Water/Oil* 

Methane 0.945 0.612 0.942 0.612 

Volatile Organic 

Compounds (VOC) 0.0137 0.296 0.030 0.296 

* Water/oil refers to water streams in oil service with a water content greater than 50% from the 

point of origin to the point where the water content reaches 99%. For water streams with a water 

content greater than 99%, the emission rate is considered negligible.

Source: API, 1996. Calculation Workbook for Oil and Gas Production Equipment Fugitive 

Emissions. 

Average equipment elevation (feet above mean sea level) – A good estimate is half the elevation 

of the top deck. 
A-21 

Equipment inventory (number of components) – An inventory of each type of component that 

handles the selected process stream at this structure. You are encouraged to prepare an 

equipment inventory by making direct counts of your components by service type. 

 Summary of Equipment Inventory Data (Number of Components) by Skid Type 

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Separator Skid 34 0 13 73 0 0 0 2 0 0 15 1 1 0 0

Heater Treater Skid 98 0 70 114 0 0 0 3 0 0 25 0 3 0 0

LACT Charge Pump Skid 21 3 6 47 0 0 0 1 0 0 9 0 0 0 0

LACT Skid 62 1 75 69 0 0 0 1 0 0 34 4 6 0 0

Pipeline Pumps Skid 39 3 12 78 0 0 0 2 0 0 70 0 3 0 0

Pig Launcher/Receiver Skid 13 0 14 16 0 0 0 0 0 0 9 0 1 0 0

Compressor Skid 119 0 113 138 0 4 0 1 0 0 69 0 9 4 0

Filter/Separator Skid 30 0 25 37 0 0 0 1 0 0 9 0 1 0 0

Gas Dehydration Skid 23 0 14 40 0 0 0 1 0 0 12 0 1 0 0

Glycol Regeneration Skid 134 0 110 194 0 0 0 4 0 0 45 1 7 6 1

Gas Meter 10 0 11 26 0 0 0 1 0 0 21 2 0 0 0

Fuel Gas Skid 62 0 47 85 0 0 0 1 0 0 32 1 4 0 0

Flotation Cell Skid 41 1 34 70 0 0 1 1 0 15 8 0 2 0 2

Scrubber 13 0 13 18 0 0 0 1 0 0 9 0 1 0 0

Amine Unit 226 8 166 391 0 0 1 5 0 0 121 2 12 0 1

Line Heater 30 0 46 18 0 0 0 1 0 0 10 0 0 0 1

Production Manifold 108 0 31 148 0 0 0 1 0 0 43 0 0 7 0

Wellhead 15 0 6 19 0 0 0 0 0 0 11 0 0 0 0

Import or Export Pipeline 3 0 0 9 0 0 0 0 0 0 0 0 0 0 0

* Because there is a large variation in emissions for compressor seals, you are asked to specify 

the compressor and seal type: 

• Centrifugal- wet seal; 

• Centrifugal- dry seal; 

• Reciprocating- shaft packing; or Other (specify). 

You may find it beneficial to use of the following information as a starting point, however. This 

information was compiled for MMS by the Offshore Operators Committee, and can be adjusted 

by service type for each component for each part of the production train (i.e., for each skid type). 

Counts must be reported for each service type (gas, heavy oil, light oil, oil/water). 
A-22 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.8.2 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-23 

A.9 GLYCOL DEHYDRATOR UNIT 

A.9.1 General Information Tab 

Note that the fire tube is considered to be a boiler/heater/burner. Information about the fire tube 

should be entered on the data entry screen for boiler/heater/burner. Access the 

boiler/heater/burner data entry screen by selecting Edit|New Equipment from the GOADS main 

menu. Select "Boiler, Heater, or Burner" as the new equipment type. 

Also note that recovered vapors, which are combusted elsewhere at the facility, should be 

accounted for by the equipment type where they are combusted. Vapors that are vented or flared 

locally or that are collected into the facility manifold system may be accounted for on the 

Ventilation System Tab. 

Processed throughput (million standard cubic feet) – The total volume of natural gas processed 

by this glycol unit during the specific monthly survey period, volume adjusted to standard 

temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Hours operated – The total number of hours that this glycol unit was in operation during the 

specific monthly survey period. 

Glycol unit elevation (feet above mean sea level) – The elevation of the glycol unit, measured 

from mean sea level to its base. 

Glycol type (TEG/EG) – Indicates the type of glycol used in this unit, triethylene glycol (TEG) 

or ethylene glycol (EG). 

Glycol circulation rate (gallons per minute) – The actual rate of glycol circulation through the 

glycol unit. 

Glycol pump type (electric/gas) – The type of pump that drives glycol circulation. 

Lean glycol H2O content (percent by weight) – The water content of the lean, or recharged, 

glycol. 

Is the unprocessed gas saturated (yes/no) – Indicates if the unprocessed gas is saturated with 

water. 

Wet gas H2O content (pounds per million standard cubic feet) – The water content of the natural 

gas prior to glycol dehydration. 

Dry gas H2O content (pounds per million standard cubic feet) – The water content of the natural 

gas following glycol dehydration. 

Wet gas temperature (degrees Fahrenheit) – The temperature of the natural gas prior to glycol 

dehydration. 
A-24 

Wet gas pressure (pounds per square inch gauge) – The pressure of the natural gas prior to glycol 

dehydration. 

Cold separator temperature (degrees Fahrenheit) – The temperature of the combined gas and 

glycol downstream of any refrigeration. If no refrigeration is present, then this is the temperature 

downstream from the separator. 

Cold separator pressure (pounds per square inch gauge) – The pressure of the combined gas and 

glycol downstream of any refrigeration. If no refrigeration is present, then this is the pressure 

downstream from the separator. 

Unprocessed natural gas concentrations (percent by volume) – The volumetric concentrations of 

constituents present in the unprocessed natural gas stream, including the following: 

• Hydrogen Sulfide 

• Methane (CH4) 

• Ethane (C2H6) 

• C3 Hydrocarbons (hydrocarbons with 3 carbon atoms in their molecular structure) 

• C4 Hydrocarbons 

• C5 Hydrocarbons 

• C6 Hydrocarbons 

• C7 Hydrocarbons 

• C8+ Hydrocarbons (hydrocarbons with 8 or more carbon atoms in their molecular 

structure) 

In addition, please report concentrations (percent by volume) for the following constituents if the 

data are readily available. It is not mandatory that you enter this data: 

• Benzene 

• Toluene 

• Ethylbenzene 

• Xylenes 

• n-Hexane 

• 2,2,4-Trimethylpentane 

Equipped with a flash tank? (yes/no) – Indicates whether the system is equipped with a flash tank 

(or separator) that vents to the atmosphere. 

Destination of flash gas – Indicates if the gas is routed back into the system, vented to the 

atmosphere, or burned in a flare. 

Flash tank temperature (degrees Fahrenheit) – The temperature of the flash tank. 
A-25 

Flash tank pressure (pounds per square inch gauge) – The pressure of the flash tank. 

Uses stripping gas? – Indicates what type of stripping gas (if any) is used in the regenerator to 

improve water removal from the rich glycol. 

• None 

• Dry gas 

• Flash gas – Exhaust from the flash tank 

• Nitrogen – From a nitrogen supply 

Stripping gas flow rate (standard cubic feet per minute) – The flow rate of stripping gas to the 

regenerator, volume adjusted to standard temperature and pressure (60 degrees Fahrenheit, 

1 atmosphere). 

No Emissions to Report – Indicates the status of the glycol dehydrator for the specific survey 

period. 

• "No Emissions to Report" - Indicates that the equipment was unused for the entire 

month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.9.2 Ventilation System Tab – For Still Column Vent Only 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create a vent or flare before it will 

appear in the list (using the Edit|New Equipment menu). 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of a process vent/flare. 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process 

vent/flare. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

Flare feed rate (standard cubic feet per hour) – The volumetric feed rate to a process flare. 
A-26 

Combustion temperature (degrees Fahrenheit) – The combustion temperature of a process flare. 

Combustion efficiency (percent) – The combustion efficiency of a process flare, or the 

completeness of hydrocarbon conversion to carbon dioxide (as CO2). 

Installed control equipment – Indicates which common types of control devices are installed for 

this equipment. 

Condenser temperature (degrees Fahrenheit) – The operating temperature of a condenser 

installed as a control device. 

Condenser pressure (absolute pounds per square inch) – The operating temperature of a 

condenser installed as a control device. 

A.9.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Ventilation System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Ventilation System Tab). 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices (other than those listed on the Ventilation System Tab). 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices (other than those listed on the Ventilation System Tab). 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices (other than those listed on the Ventilation System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Ventilation System 

Tab). 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices (other than those 

listed on the Ventilation System Tab). 

A.9.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 
A-27 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-28 

A.10 LOADING OPERATION 

A.10.1 General Information Tab 

Volume loaded (barrels) – The quantity of liquid hydrocarbon loaded into ships or barges at this 

structure. 

Average elevation (feet above mean sea level) – The approximate elevation of loading 

operations, measured from mean sea level to the point of the receiving vessel. 

Storage tank paint color – The exterior paint color of the receiving storage tank. 

Storage tank paint condition – The exterior paint condition of the receiving storage tank. 

Bulk liquid temperature (degrees Fahrenheit) – The bulk temperature of the liquid contained 

within the receiving storage tank. 

Product Reid vapor pressure (absolute pounds per square inch) – The Reid vapor pressure of the 

liquid contained within the receiving storage tank. 

Average percent by weight of VOCs in tank vapor (percent) – The VOC content of vapors in the 

storage tank headspace, measured as weight percent. 

Average molecular weight of VOCs in tank vapor (pounds per pound-mol) – The average 

molecular weight of VOCs present in the storage tank headspace. 

No Emissions to Report – Indicates the status of the loading operations for the specific survey 

period. 

• "No Emissions to Report" - Indicates that no loading operations occurred for the 

entire month-long survey period. 

Comments - A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.10.2 Ventilation System Tab 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create a vent or flare before it will 

appear in the list (using the Edit|New Equipment menu). 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 
A-29 

Outlet inner diameter (inches) – The inner diameter of a process vent/flare. 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process 

vent/flare. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

Flare feed rate (standard cubic feet per hour) – The volumetric feed rate to a process flare. 

Combustion temperature (degrees Fahrenheit) – The combustion temperature of a process flare. 

Combustion efficiency (percent) – The combustion efficiency of a process flare, or the 

completeness of hydrocarbon conversion to carbon dioxide (as CO2). 

Installed control equipment – Indicates which common types of control devices are installed for 

this equipment. 

A.10.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Ventilation System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Ventilation System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Ventilation System 

Tab). 

A.10.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-30 

A.11 LOSSES FROM FLASHING 

A.11.1 General Information Tab 

Type of vessel – Indicates the type of vessel (separator, heater treater, surge tank, storage tank, 

other) where the flashing occurs. 

API gravity of stored oil (degrees API) – The API gravity of the oil/condensate contained within 

the vessel where the flashing occurs. 

Operating pressure of vessel (pounds per square inch gauge)– Indicates the pressure setting of 

the vessel where the flashing occurs. 

Operating temperature of vessel (degrees Fahrenheit) – Indicates the operating temperature of the 

vessel where the flashing occurs. 

Oil/condensate throughput (barrels) – Indicates the actual throughput volume of oil/condensate 

for each vessel for the specific monthly survey period. 

Operating pressure immediately upstream of vessel (pounds per square inch gauge) – Indicates 

the operating pressure upstream of the vessel. 

Operating temperature immediately upstream of vessel (degrees Fahrenheit) – Indicates the 

operating temperature upstream of the vessel. 

Standard cubic feet of flash per barrel of oil (SCF/barrel) – If data are readily available, indicate 

the SCF of flash per barrel of oil/condensate specific to your source. It is not mandatory that you 

that you enter this data. 

No Emissions to Report – Indicates the status of the vessel for the specific survey period. 

• "No Emissions to Report" - Indicates that the vessel was empty and unused for the 

entire month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.11.2 Ventilation System Tab 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create a vent or flare before it will 

appear in the list (using the Edit|New Equipment menu). 
A-31 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of a process vent. 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process vent. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

A.11.3 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-32 

A.12 MUD DEGASSING 

A.12.1 General Information Tab 

Days per month of drilling with mud (i.e., drilling fluid) – The total number of 24-hour days that 

drilling (with mud) occurred during the specific monthly survey period. 

Type of mud – Indicates the type of mud used (drilling fluid) (water-based, oil-based, or 

synthetic). 

No Emissions to Report – Indicates the status of the operation for the specific survey period. 

• "No Emissions to Report" – Indicates that the equipment was unused for the 

entire month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.12.2 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user's explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-33 

A.13 NATURAL GAS ENGINE 

A.13.1 General Information Tab 

Engine elevation (feet above mean sea level) – The elevation of an engine, measured from mean 

sea level to its base. 

Hours operated – The total number of hours that this engine was in operation during the specific 

monthly survey period. 

Manufacturer – The company name of the engine manufacturer. 

Model No. – The manufacturer’s model number of the engine. 

Engine stroke – Indicates whether the engine is a 2-stroke design or a 4-stroke design. 

Engine burn – Indicates the fuel burn conditions (lean-burn, rich-burn, or clean-burn). 

Fuel H2S content (parts per million by volume) – The concentration of hydrogen sulfide in 

gaseous fuel types. 

Fuel heating value (British thermal units per standard cubic feet) – The energy content of 

gaseous fuel types. 

Max rated horsepower (horsepower) – The manufacturer’s maximum rated horsepower output. 

Operating horsepower (horsepower) – The operating horsepower during operation this survey 

period. 

Max rated fuel usage (British thermal units per horsepower-hour) – The manufacturer’s 

maximum rate of fuel usage. 

Average fuel usage (British thermal units per horsepower-hour) – The average rate of fuel usage 

during operation this survey period. 

Total fuel used (thousand standard cubic feet) – Total gaseous fuel used during this survey 

period, volume adjusted to standard temperature and pressure (60 degrees Fahrenheit, 

1 atmosphere). If you do not monitor actual fuel use for an engine, a value may be calculated 

using: 

[Hours operated * average fuel usage (Btu/hp-hr) * operating horsepower]÷[fuel heating value 

(1,050 Btu/scf) * (1,000 scf/Mscf)]. 

No Emissions to Report – Indicates the status of the engine for the specific survey period. 

• "No Emissions to Report" – Indicates that the equipment was unused for the 

entire month-long survey period. 
A-34 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.13.2 Exhaust System Tab 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of the exhaust outlet. 

Exit velocity (feet/second) – The exit velocity of emissions through the exhaust outlet. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

exhaust outlet. 

Outlet orientation (degrees) – The deviation of the exhaust outlet from vertically upward. 

0 indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

A.13.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed. 

Description – If present, a description of other control devices is required. 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices. 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices. 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices. 

VOC efficiency (percent) – The total combined reductions in volatile organic compound 

emissions achieved by all other installed control devices. 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices. 
A-35 

A.13.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.) 
A-36 

A.14 NATURAL GAS TURBINE 

A.14.1 General Information Tab 

Engine elevation (feet above mean sea level) – The elevation of a natural gas turbine, measured 

from mean sea level to its base. 

Hours operated – The total number of hours that this turbine was in operation during the specific 

monthly survey period. 

Manufacturer – The company name of the turbine manufacturer. 

Model No. – The manufacturer’s model number of the turbine. 

Engine purpose of use – The purpose for which this turbine is used. 

• Electricity Generation 

• Product Pressurization 

• Other 

Fuel H2S content (parts per million by volume) – The concentration of hydrogen sulfide in 

gaseous fuel types. 

Fuel heating value (British thermal units per standard cubic feet) – The energy content of 

gaseous fuel types. 

Max rated horsepower (horsepower) – The manufacturer’s maximum rated horsepower output. 

Operating horsepower (horsepower) – The operating horsepower during operation this survey 

period. 

Max rated fuel usage (British thermal units per horsepower-hour) – The manufacturer’s 

maximum rate of fuel usage. 

Average fuel usage (British thermal units per horsepower-hour) – The average rate of fuel usage 

during operation this survey period. 

Total fuel used (thousand standard cubic feet) – Total gaseous fuel used during this survey 

period, volume adjusted to standard temperature and pressure (60 degrees Fahrenheit, 

1 atmosphere). If you do not monitor actual fuel use for a turbine, a value may be calculated 

using: 

[Hours operated * average fuel usage (Btu/hp-hr) * operating horsepower]÷[fuel heating value 

(1,050 Btu/scf) * (1,000 scf/Mscf)]. 

No Emissions to Report – Indicates the status of the turbine for the specific survey period. 
A-37 

• "No Emissions to Report" – Indicates that the equipment was unused for the 

entire month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.14.2 Exhaust System Tab 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of the exhaust outlet. 

Exit velocity (feet/second) – The exit velocity of emissions through the exhaust outlet. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

exhaust outlet. 

Outlet orientation (degrees) – The deviation of the exhaust outlet from vertically upward. 0 

indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

A.14.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Exhaust System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Exhaust System Tab). 

SOx efficiency (percent) – The total combined reductions in sulfur oxides emissions achieved by 

all other installed control devices (other than those listed on the Exhaust System Tab). 

NOx efficiency (percent) – The total combined reductions in nitrogen oxides emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

CO efficiency (percent) – The total combined reductions in carbon monoxide emissions achieved 

by all other installed control devices (other than those listed on the Exhaust System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Exhaust System 

Tab). 

PM10 efficiency (percent) – The total combined reductions in PM10 emissions (particulate matter 

under 10 microns in diameter) achieved by all other installed control devices (other than those 

listed on the Exhaust System Tab). 
A-38 

A.14.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click "Add QC Comment" in order to add 

Operator Comments.)
A-39 

A.15 PNEUMATIC PUMPS

A.15.1 General Information Tab 

Manufacturer – The company name of the equipment manufacturer. Examples include: Wilden 

diaphragm pumps (M-1, M-2, M-4, M-8, M-15); and Texsteam chemical injection and 

diaphragm pumps. 

Model – The manufacturer’s model number of the pump. Only include pumps that are in natural 

gas service. Do not include pumps in compressed air service. 

Fuel usage rate (standard cubic feet per hour) – The rate of natural gas usage during operation 

this survey period. If this information is not readily available, it is not mandatory that you enter 

this data. 

Hours operated – The total number of hours that the pump was in operation during the specific 

monthly survey period. 

Pump elevation (feet above mean sea level) – The approximate elevation of the pump, measured 

from mean sea level to its base. 

No Emissions to Report – Indicates the status of the pump for the specific survey period. 

• “No Emissions to Report” – Indicates that the pump was unused for the entire 

month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.15.2 Ventilation System Tab 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of a process vent. 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process vent. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 
A-40 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

A.15.3 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-41 

A.16. PRESSURE/LEVEL CONTROLLERS 

A.16.1 General Information Tab 

Service Type – Indicates whether the equipment is in pressure control or level control service. 

Manufacturer – The company name of the equipment manufacturer. Only include equipment 

that is in natural gas service. Do not include equipment in compressed air service. 

Model – The manufacturer’s model number of the equipment. 

Number of this make-model – Number of equipment of this exact make and model. 

Fuel usage rate (standard cubic feet per hour) – The rate of natural gas usage during operation 

this survey period. If this information is not readily available, it is not mandatory that you enter 

this data. 

Hours operated – The total number of hours that the equipment was in operation during the 

specific monthly survey period. 

Equipment elevation (feet above mean sea level) – A good estimate is half the elevation of the 

top deck. 

No Emissions to Report – Indicates the status of the equipment operations for the specific survey 

period. 

• "No Emissions to Report" - Indicates that the equipment was unused for the entire 

month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.16.2 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 
A-42 

A.17. STORAGE TANK 

A.17.1 General Information Tab 

Product throughput (barrels) – The volume of liquid hydrocarbon turned over through the storage 

tank during the survey period. 

Tank elevation (feet above mean sea level) – The elevation of a storage tank, measured from 

mean sea level to its base. 

Tank orientation (horizontal/vertical) – Indicates whether the tank is elongated and narrow in the 

horizontal direction (horizontal), or otherwise (vertical). 

Tank shape (cylindrical/rectangular) – Indicates whether the tank is cylindrical or rectangular in 

shape. 

Average liquid height (feet) – The average height of stored liquid during the survey period, 

measured from the bottom of the storage space to the top of the liquid. 

Tank shell diameter (feet) – The diameter of a cylindrical tank (either horizontal or vertical). 

Tank shell height (feet) – The vertical height of a cylindrical tank (oriented vertically) or of a 

rectangular tank (oriented vertically or horizontally). 

Tank shell length (feet) – The longest horizontal dimension of a horizontal tank. 

Tank shell width (feet) – The horizontal width of a rectangular tank (oriented vertically or 

horizontally). 

2

nd Tank shell width (feet) – The 2nd horizontal width of a rectangular tank (oriented vertically). 

Is the roof fixed (not floating)? (yes/no) – Indicates whether the tank has a fixed or floating roof. 

Roof shape – Indicates the shape of a vertical tank’s roof. 

• Cone – cylindrical tanks 

• Dome – cylindrical tanks 

• Flat – cylindrical or rectangular 

• Peaked – rectangular 

Roof height above shell (feet) – The height of a fixed roof measured from the top of the tank 

shell to the highest point of the roof. 

Breather vent pressure setting (pounds per square inch gauge) – The pressure setting of the tank 

breather valve. 
A-43 

Breather vent vacuum setting (pounds per square inch gauge) – The vacuum setting of the tank 

breather valve. 

Paint color – The exterior paint color of the storage tank. 

Paint condition – The exterior paint condition of the storage tank. 

Bulk liquid temperature (degrees Fahrenheit) – The bulk temperature of the liquid contained 

within the storage tank. 

Product type (crude/condensate) – Indicates whether the storage tank contains crude oil or 

condensates. It is not mandatory that you enter data for jet fuel storage tanks. 

API gravity (degrees API) – The API gravity of the liquid contained within the storage tank. 

Product Reid vapor pressure (absolute pounds per square inch) – The Reid vapor pressure of the 

liquid contained within the storage tank. 

Average percent by weight of VOCs in tank vapor (percent) – The VOC content of vapors in the 

storage tank headspace, measured as weight percent. 

Average molecular weight of VOCs in tank vapor (pounds per pound-mol) – The average 

molecular weight of VOCs present in the storage tank headspace. 

Equipped with a flash tank? (yes/no) – Indicates whether the storage tank is equipped with an 

upstream flash tank. 

No Emissions to Report – Indicates the status of the storage for the specific survey period. 

• “No Emissions to Report” – Indicates that the tank was empty and unused for the 

entire month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.17.2 Ventilation System Tab 

Emissions destination – Indicates whether the emissions from this equipment are vented or flared 

locally, or at some distance from the equipment. 

Low-pressure vent/flare ID – Indicates the destination vent or flare identifier code (if emissions 

are not vented or flared locally). It may be necessary to first create 

Outlet height (feet above mean sea level) – The elevation of the stack outlet above mean sea 

level. 

Outlet inner diameter (inches) – The inner diameter of a process vent or the effective diameter of 

a flare. 
A-44 

Exit velocity (feet/second) – The exit velocity of emissions through the outlet of a process 

vent/flare. 

Exit temperature (degrees Fahrenheit) – The temperature of gaseous emissions measured at the 

outlet of a process vent. 

Outlet orientation (degrees) – The deviation of the outlet from vertically upward. 0 indicates an 

upward pointing outlet; 180 indicates a downward pointing outlet. 

Flare feed rate (standard cubic feet per hour) – The volumetric feed rate to a process flare. 

Combustion temperature (degrees Fahrenheit) – The combustion temperature of a process flare. 

Combustion efficiency (percent) – The combustion efficiency of a process flare, or the 

completeness of hydrocarbon conversion to carbon dioxide (as CO2). 

Installed control equipment – Indicates which common types of control devices are installed for 

this equipment. 

Condenser temperature (degrees Fahrenheit) – The operating temperature of a condenser 

installed as a control device. 

Condenser pressure (absolute pounds per square inch) – The operating pressure of a condenser 

installed as a control device. 

A.17.3 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether additional controls are installed, other than 

the common control devices listed on the Ventilation System Tab. 

Description – If present, a description of other control devices is required (other than those listed 

on the Ventilation System Tab). 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices (other than those listed on the Ventilation System 

Tab). 
A-45 

A.17.4 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
A-46 

A.18 COLD VENT 

A.18.1 General Information Tab 

Note that vented emissions are NOT combusted. If emissions are combusted, create a 

Combustion Flare record. 

Hours operated, including upsets – The total number of hours that the vent was operated during 

the survey period, including periods of upset venting. 

Volume vented (thousand standard cubic feet), including upsets – The total volume of gas vented 

during the survey period, including periods of upset venting, volume adjusted to standard 

temperature and pressure (60 degrees Fahrenheit, 1 atmosphere). 

Vent type – Indicates whether vent gases are released at high pressure or low pressure. 

Vent gas H2S Concentration (parts per million by volume) – The concentration of hydrogen 

sulfide present in the vented gas. 

Vent gas VOC Concentration (parts per million by volume) – The concentration of volatile 

organic compounds present in the vented gas. 

Average molecular weight of VOCs (lb/lb-mol) – The average molecular weight of VOCs 

present in the vented gas. 

Stack outlet elevation (feet above mean sea level) – The elevation of the vent stack outlet above 

mean sea level. 

Stack inner diameter (inches) – The inner diameter of the vent stack at its outlet. 

Average exit velocity (feet per second) – The average exit velocity of vented gas at the stack 

outlet. 

Exit temperature (degrees Fahrenheit) – The average temperature of vented gas at the stack 

outlet. 

Stack orientation (degrees) – The deviation of the stack outlet from vertically upward. 

0 indicates an upward pointing outlet; 180 indicates a downward pointing outlet. 

Installed control equipment – Indicates which common types of control devices are installed on 

the vent. 

Condenser temperature (degrees Fahrenheit) – The operating temperature of a condenser 

installed as a control device. 

Condenser pressure (absolute pounds per square inch) – The operating pressure of a condenser 

installed as a control device. 
A-47 

No Emissions to Report – Indicates the status of the vent for the specific survey period. 

• “No Emissions to Report” – Indicates that the vent was unused for the entire 

month-long survey period. 

Comments – A space for general user comments regarding this structure, with a maximum length 

of 255 characters. 

A.18.2 Control Equipment Tab 

Other control device? (yes/no) – Indicates whether controls are installed. 

Description – If present, a description of other control devices is required. 

VOC efficiency (percent) – The total combined reductions in volatile organics emissions 

achieved by all other installed control devices. 

A.18.3 QC Results Tab 

Error Source – List of input variables for this equipment that have been flagged with QC error 

messages. 

Error Description – List of the reasons that QC error messages were assigned. 

Operator Comment – List of user’s explanations for unusual or unexpected values that were 

flagged with QC error messages. An operator comment indicates that the user wishes to override 

the QC error message. (Select an error message, then click “Add QC Comment” in order to add 

Operator Comments.) 
APPENDIX B 

GOADS-2005 QA SUMMARY FORM DATA FIELDS 
B-3 

This appendix indicates the data fields that will be flagged in the QA Summary Form if they are 

missing or inconsistent from month to month. If all of your GOADS-2005 entries are complete 

and the values are within two standard deviations of the average for all values in that field, the 

QA Summary Form will be blank. 

The data fields in the QA Summary Form are critical to developing emission estimates. If an 

element appears on the QA Summary Form printout, you should re-evaluate your GOADS-2005 

file and complete or correct the data you entered for the equipment or month shown. If the 

flagged value is legitimate, you may annotate the QA Summary Form using colored ink, or 

attach additional sheets which specify why a value is valid and does not need to be changed. 

You must print out the GOADS-2005 QA Summary Form and submit it with your data files. If 

any values are flagged as incomplete or inconsistent, MMS will contact you. Please make sure 

you review the QA Summary Form closely, correct and errors that are flagged, and use the 

comment field for flagged entries that are valid. The following table lists the type codes used on 

the QA Summary Form.
B-4 

GOADS-2005 QA Summary Form 

Equipment Type Codes 

AMI = Amine gas sweetening unit 

BOI = Boiler/heater/burner 

DIE = Diesel or gasoline engine 

DRI = Drilling rig 

FLA = Combustion Flare 

FUG = Fugitives 

GLY = Glycol dehydrator unit 

LOA = Loading operation 

LOS = Losses from flashing 

MUD = Mud degassing 

NGE = Natural gas engine 

NGT = Natural gas turbine 

PNE = Pneumatic pumps 

PRE = Pressure/level controllers 

STO = Storage tank 

VEN = Cold Vent 
B-5

GOADS-2005 QA Summary Form Data Fields 

SURVEY LEVEL Operator Comments 

General Operator Information 

User name and phone number 

Company name

Survey Information 

Operator identified

12 surveys included 

Structure Information

Area/Block/Name 

Longitude/latitude 

Distance to shore 

Gas production 

Crude oil production 

Natural gas usage for all 12 months consistent with survey data 

Diesel fuel usage for all 12 months consistent with survey data 

Gasoline usage for all 12 months consistent with survey data 

Number and unique pieces of equipment consistent for all 12 mos. 

Sales gas composition 
B-6

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Equipment Information

Amine Gas Sweetening Unit

Processed throughput 

Hours operated 

Unprocessed natural gas concentration (% by volume) 

Quantity emitted when uncontrolled (%) 

Amine type* 

Equipped with a flash tank (yes/no)* 

Disposition of flash gas* 

Vented into low-pressure system 

Gases vented or flared 

Boilers/heaters/burners

Fuel type 

Maximum rated heat input 

Hours of operated 

Average heat input 

Control device identified 

Same equipment units reported for each month/survey
B-7

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Diesel or Gasoline Engines 

Fuel type 

Maximum rated horsepower 

Hours operated 

Operating horsepower 

Maximum rated fuel usage

Average fuel usage 

Control device identified 

Same equipment units reported for each month/survey 

Drilling Rig 

Hours operated 

Total diesel fuel usage 

Total gasoline usage 

Total natural gas fuel usage 

Combustion Flare 

Volume flared reported for continuous and episodic flaring 

Continuous pilot

Pilot fuel feed rate 
B-8

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Fugitives 

Stream type (gas, heavy oil, light oil, or water/oil) 

Average VOC weight % 

Number of components that handle the stream type 

Glycol Dehydrator Unit 

Processed throughput 

Glycol type 

Hours operated 

Gas saturated (yes/no) 

Unprocessed natural gas concentrations 

Equipped with a flash tank (yes/no) 

Disposition of flash gas 

Loading Operations 

Volume loaded to ships and barges 

Tank color 

Tank condition 

Losses from Flashing 

Type of vessel 

API gravity of stored oil 
B-9

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Operating pressure of each vessel 

Operating temperature of each vessel 

Operating pressure upstream of vessel 

Operating temperature upstream of vessel 

Oil/condensate throughput for each vessel 

Disposition of flash gas

Mud Degassing

Number of drilling days (with mud) 

Mud type used (water-based, synthetic, oil-based) 

Natural Gas Turbines

Hours operated 

Operating horsepower 

Maximum rated fuel usage 

Average fuel usage 

Control device identified 

Same equipment units reported for each month/survey 

Natural Gas Engines

Engine stroke 

Engine burn 
B-10

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Hours operated 

Operating horsepower 

Maximum rated fuel usage 

Average fuel usage 

Control device identified 

Same equipment units reported for each month/survey 

Pneumatic Pumps 

Manufacturer 

Model 

Hours operated 

Pressure/level Controllers

Manufacturer 

Model 

Hours operated 

Service type 

Storage Tank 

Product throughput 

Product type 

Tank color 
B-11

GOADS-2005 QA Summary Form Data Fields (Continued) 

SURVEY LEVEL Operator Comments 

Tank condition 

Tank shape 

Tank orientation 

Tank shell height 

Tank shell diameter 

Tank shell width 

Roof shape 

Roof height above shell 

Equipped with a flash tank (yes/no) 

Cold Vent 

Hours operated, including upsets 

Volume vented, including upsets 

Control device identified 

Average vent feed 

* If the uncontrolled quantity emitted from the amine unit is not completed.
The Department of the Interior Mission

As the Nation's principal conservation agency, the Department of the Interior has responsibility 

for most of our nationally owned public lands and natural resources. This includes fostering 

sound use of our land and water resources; protecting our fish, wildlife, and biological diversity; 

preserving the environmental and cultural values of our national parks and historical places; 

and providing for the enjoyment of life through outdoor recreation. The Department assesses 

our energy and mineral resources and works to ensure that their development is in the best 

interests of all our people by encouraging stewardship and citizen participation in their care. 

The Department also has a major responsibility for American Indian reservation communities 

and for people who live in island territories under U.S. administration. 

The Minerals Management Service Mission 

As a bureau of the Department of the Interior, the Minerals Management Service's (MMS) 

primary responsibilities are to manage the mineral resources located on the Nation's Outer 

Continental Shelf (OCS), collect revenue from the Federal OCS and onshore Federal and Indian 

lands, and distribute those revenues. 

Moreover, in working to meet its responsibilities, the Offshore Minerals Management Program 

administers the OCS competitive leasing program and oversees the safe and environmentally 

sound exploration and production of our Nation's offshore natural gas, oil and other mineral 

resources. The MMS Minerals Revenue Management meets its responsibilities by ensuring the 

efficient, timely and accurate collection and disbursement of revenue from mineral leasing and 

production due to Indian tribes and allottees, States and the U.S. Treasury. 

The MMS strives to fulfill its responsibilities through the general guiding principles of: (1) being 

responsive to the public's concerns and interests by maintaining a dialogue with all potentially 

affected parties and (2) carrying out its programs with an emphasis on working to enhance the 

quality of life for all Americans by lending MMS assistance and expertise to economic 

development and environmental protection.