5900-102 Gathering and Processing

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Overview

Partner Info and ToC
Dehydrator Vents
Equipment Leaks
Pneumatics - Gathering
Pneumatics - Processing
Additional Activities
references

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Sheet 1: Partner Info and ToC

Natural Gas STAR Annual Report - Gathering & Processing Segment
FORM VERSION: REPORTING SEASON 20XX
Partner Name
Reporting Year	20XX
Use the Table of Contents below to navigate to the different tabs of the form. You can use column B to indicate if you reported data on a specific tab.
Distribution Emission Sources	Data Reported	Information
Dehydrator Vents		Install flash tank separators on glycol dehydrator vents
Equipment Leaks		Directed inspection and maintenance at gas plants and booster stations
Pneumatic Controllers - Gathering & Boosting		Convert high-bleed controllers to low-bleed; convert high-bleed or low-bleed controllers to zero-emitting controllers; remove controllers from service with no replacement.
Pneumatic Controllers - Processing
Additional Gathering and Processing Activities		Use this tab to report all other methane reductions in the Gathering and Processing segment. You will be able to select the technology/practice used from the list of Natural Gas STAR Partner Reported Opportunities. If the activity you are reporting is not included in the list, please contact EPA at GasSTAR@epa.gov
The public reporting and recordkeeping burden for this collection of information is estimated to average 51 hours for each new response and 25 hours for subsequent responses. Send comments on the Agency's need for this information, the accuracy of the provided burden estimates, and any suggested methods for minimizing respondent burden, including through the use of automated collection techniques to the Director, Collection Strategies Division, U.S. Environmental Protection Agency (2822T), 1200 Pennsylvania Ave., NW, Washington, D.C. 20460. Include the OMB control number in any correspondence. Do not send the completed form to this address.

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Sheet 2: Dehydrator Vents

Dehydrator Vents								Return to Table of Contents
Install Flash Tank Separators on Glycol Dehydrators
Start Year	Eligible Sunset Years for this Activity	Automatically calculate sunsets?	End Year	Calculation Method: Default, Standard, or Other	Calculate Using Default			Calculate Using Standard Calculation				Other Calculation		Provide additional comments or detail about how your company implemented this BMP
					Number of Flash Tank Separators Installed	Average Gas Throughput (MMcf/yr)	Calculated Total Methane Emission Reduction Based on Default Values {[Number of Flash Tank Separators Installed]x[Average Gas Throughput]) x 170 scf/MMcf x 0.9] / 1000]}	TEG Circulation Rate (gal/hr)	Methane Entrainment Rate (scf/gal)	Hours of Operation (hrs/yr)	Calculated Total Methane Emission Reduction Based on Standard Calculation {[TEG Circulation Rate]x [Methane Entrainment Rate]x[Hours of Operation] x 0.90] / 1000}	Total Methane Emission Reduction Based on Other Assumptions (Mcf/yr)	Explain Reduction Calculation Used
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Sheet 3: Equipment Leaks

Equipment Leaks						Return to Table of Contents
Directed inspection and maintenance at gas plants and booster stations
Year	Total Number of Surveys Conducted	Total Number of Leaks Found	Total Number of Leaks Repaired	Total Number of Facilities at Which Leaks Repaired	Basis for Emission Reduction Estimate	Total Methane Emission Reductions (Mcf/yr)	Explain Reduction Calculation Used	Provide additional comments or detail about how your company implemented this BMP

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Sheet 4: Pneumatics - Gathering

Pneumatic Controllers - Gathering and Boosting					Return to Table of Contents
Convert high-bleed controllers to low-bleed; convert high-bleed or low-bleed controllers to zero-emitting controllers; remove controllers from service with no replacement
				Convert high-bleed to low-bleed		Convert high-bleed to zero-bleed/remove from service		Convert low-bleed to zero-bleed/remove from service
Start Year	New or Ongoing?	Average Methane Content of Gas (enter as a decimal; leave blank to use default 82.1% methane)	Average annual operating hours (leave blank to use default 8760 hours)	Number of controllers converted	Calculated Total Methane Emission Reductions (Mcf/yr)	Number of controllers converted/removed from service	Calculated Total Methane Emission Reductions (Mcf/yr)	Number of controllers converted/removed from service	Calculated Total Methane Emission Reductions (Mcf/yr)	Provide additional comments or detail about how your company implemented this BMP

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Sheet 5: Pneumatics - Processing

Pneumatic Controllers					Return to Table of Contents
Convert high-bleed controllers to low-bleed; convert high-bleed or low-bleed controllers to zero-emitting controllers; remove controllers from service with no replacement
				Convert high-bleed to low-bleed		Convert high-bleed to zero-bleed/remove from service		Convert low-bleed to zero-bleed/remove from service
Start Year	New or Ongoing?	Average Methane Content of Gas (enter as a decimal; leave blank to use default 82.1% methane)	Average annual operating hours (leave blank to use default 8760 hours)	Number of controllers converted	Calculated Total Methane Emission Reductions (Mcf/yr)	Number of controllers converted/removed from service	Calculated Total Methane Emission Reductions (Mcf/yr)	Number of controllers converted/removed from service	Calculated Total Methane Emission Reductions (Mcf/yr)	Provide additional comments or detail about how your company implemented this BMP

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Sheet 6: Additional Activities

Additional Gathering & Processing Activities						Return to Table of Contents
Start Year	Select the Activity	Eligible Sunset Years for this Activity	Automatically calculate sunsets (if Sunset Years >1)?	End Year	Total Methane Emission Reduction (Mcf/yr)	Basis for Emission Reduction Estimate	Explain Reduction Calculation Used	Describe how your company implemented this activity (e.g., number of units installed or other activities conducted)

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Sheet 7: references

This sheet summarizes values used in calculations in this workbook. If you have questions on any of the values used, please contact EPA at GasSTAR@epa.gov
Install Flash Tank Separators on Glycol Dehydrators
Default Values
Emission Factor1	170	scf/MMcfd
Efficiency2	0.9	percent (expressed as decimal)
Pneumatic Controllers
Emission Factors - Gathering and Boosting	Source: 40 CFR 98, Table W-1A (Population Emission Factors, Gas Service)
Low Continuous Bleed Pneumatic Device Vents	1.39	scf whole gas / hour / device
High Continuous Bleed Pneumatic Device Vents	37.3	scf whole gas / hour / device
Emission Factors - Processing	Source: 40 CFR 98, Table W-3B [Transmission segment factors used as a proxy for Processing]
Low Continuous Bleed Pneumatic Device Vents	1.37	scf whole gas / hour / device
High Continuous Bleed Pneumatic Device Vents	18.2	scf whole gas / hour / device
Default Values
Operating hours	8760	Assumes 24/7 operation all year
Methane content of natural gas	82.1%	Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2016, Annex 3.6 (Table 3.6-3), https://www.epa.gov/sites/production/files/2018-04/2018_ghgi_natural_gas_systems_annex_tables.xlsx
Notes:
1 Derived from “Methane Emissions from the Natural Gas Industry,” Volume 14, Glycol Dehydrators, co-sponsored by the Gas Research Institute and EPA, June 1996
2 Derived from “Optimize Glycol Circulation And Install Flash Tank Separators In Glycol Dehydrators” Lessons Learned document, EPA, October 2006.