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AGA Voluntary Sustainability Metrics: Quantitative Information - DE Gas Utilities

Disclaimer: All information below is being provided on a voluntary basis, and as such, companies may elect to include or exclude any of the topics outlined below and customize the template to their specific needs. The decision to include data for historical and future years is at the discretion of each company and the specific years (e.g., historical baseline) should be chosen as appropriate for each company.

Parent Company Dominion Energy Inc
Operating Company(s) DEUWI, DETI, DEOH, DEWV, DECGT, DEQP, DEWexpro
Business Type(s) Vertically integrated
State(s) of Operation VA, PA, OH, MD, NY, SC, WV, UT, WY, ID, CO
Regulatory Environment Regulated and Unregulated
Note: Data from operating companies is rolled up to the corporate level.
Report Date 12/31/2018

Natural Gas Distribution


1. Methane Emissions and Mitigation from Distribution Mains
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
1.1 Number of Gas Distribution Customers 2,146,290* 1,998,574 For all EPA-reported distribution companies.
1.2 Distribution Mains in Service 40,834 41,290 These metrics should include all local distribution companies (LDCs) held by the Parent Company that are above the LDC Facility reporting threshold for EPA's 40 C.F.R. 98, Subpart W reporting rule. For all EPA-reported distribution companies.
1.2.1 Plastic (miles) 23,088 23,710 For all EPA-reported distribution companies.
1.2.2 Cathodically Protected Steel - Bare & Coated (miles) 12,116 12,119 For all EPA-reported distribution companies.
1.2.3 Unprotected Steel - Bare & Coated (miles) 5,598 5,437 For all EPA-reported distribution companies.
1.2.4 Cast Iron / Wrought Iron - without upgrades (miles) 31 24 For all EPA-reported distribution companies.
1.3 Plan/Commitment to Replace / Upgrade Remaining Miles of Distribution Mains (# years to complete) 15 14 These metrics should provide the number of years remaining to take out of service, replace or upgrade cathodically unprotected steel mains, and cast iron/wrought iron mains, consistent with applicable state utility commission authorizations. For all EPA-reported distribution companies.
1.3.1 Unprotected Steel (Bare & Coated) 15 14 This metric should be the longest period of all distribution companies. DEUT replaced all unprotected steel and cast iron over 10 years ago.
1.3.2 Cast Iron / Wrought Iron 15 14 This metric should be the longest period of all distribution companies. DEUT replaced all unprotected steel and cast iron over 10 years ago.
*2017 value adjusted to reflect value reported to ONE Future.

2. Distribution CO2e Fugitive Emissions
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
2.1 CO2e Fugitive Methane Emissions from Gas Distribution Operations (metric tons) 800,728 782,483 Fugitive methane emissions (not CO2 combustion emissions) stated as CO2e, as reported to EPA under 40 CFR 98, Subpart W, sections 98.236(q)(3)(ix)(C)and (D), 98.236(r)(1)(iv) and (v), and 98.236(r)(2)(v)(A) and (B). This metric should include fugitive methane emissions above the reporting threshold for all natural gas local distribution companies (LDCs) held by the Parent Company that are above the LDC Facility reporting threshold for EPA's 40 C.F.R. 98, Subpart W reporting rule. Reports fugitive methane emissions only - Does not include CO2 emissions which are reported to EPA (783,426 with CO2).
2.1a Fugitive Methane Emissions from Gas Distribution Operations (metric tons) 32,029 31,299 Methane emissions from EPA-reported LDCs DEUT, DEWV, and DEOH.
2.2 Natural Gas Throughput from Gas Distribution Operations in thousands of scf 511,578,083 570,763,719 This metric provides gas distribution throughput reported under Subpart W, 40 C.F.R. 98.236(aa)(9)(i) through (iii), as reported on the Subpart W e-GRRT integrated reporting form in the “Facility Overview” worksheet Excel form, gas received (column 1) plus the gas withdrawn (column 2) minus the gas injected into storage (column 3). See screenshot of e-GRRT report provided in template instructions.
2.3 CO2e Fugitive Methane Emissions Rate (metric tons per thousands scf of Throughput) 0.0016 0.0014 2.1 divided by 2.2
2.3a Fugitive Methane Emissions Rate (metric tons methane per methane content of the above mscf of Throughput) 0.0034 0.003 (Row 2.1a divided by density of CH4)/(Row 2.2 times 0.95 percent CH4 in gas)

Natural Gas Transmission & Storage


Ref. No. Metric Year
2017
Year
2018
Definitions Comments
1.2 Transmission Pipelines, Blow Down Volumes, and Fugitive Emissions
1.2.1 Total Miles of Transmission Pipeline Operated by gas utility (miles) N/A N/A No DE utilities report under this segment.
1.2.2 Volume of Transmission Pipeline Blow Down Emissions - outside storage and compression facilities (metric tons of CO2e): N/A N/A As reported to EPA under 40 CFR 98, Subpart W. No DE utilities report under this segment.
1.2.2.1 SCF of natural gas N/A N/A Not reported to EPA.
1.2.2.3 Metric tons CO2e N/A N/A No DE utilities report under this segment.
1.3 Underground Natural Gas Storage Emissions
1.3.2 Storage Compressor Station Emissions (metric tons CO2e) 3,917 5,430 As reported to EPA under 40 CFR 98, Subpart W. Total EPA-reported DEOH storage station emissions (Chippewa & Robinson) minus wellhead emissions. Only the DEOH storage facilities are technically within a utility.
1.3.3 Storage Facility Wellhead Component Fugitive Emissions (metric tons of CO2e) 1,764 1,764 Utilizing EPA emissions factors, as reported to EPA under Subpart W, 40 CFR 98.236, on the e-GRRT integrated reporting form, "Equipment Leaks Surveys and Population Counts [98.236 (q, r)]" tab. Total EPA-reported DEOH storage station emissions (Chippewa & Robinson) minus wellhead emissions. Only the DEOH storage facilities are technically within a utility.

2. CO2e Emissions for Transmission and Storage Compression
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
2.1 CO2e Emissions for Transmission Pipelines (metric tons) 26,649 CO2 combustion emissions as reported to EPA under 40 CFR 98, Subpart C and methane emissions stated as CO2e as reported under Subpart W. Total EPA-reported DEOH transmission station (Switzerland) emissions including Subpart C. 2018 was the first year reporting for Switzerland Station.
2.2 CO2e Emissions for Storage Facilities (metric tons) 42,007 45,545 CO2 combustion emissions as reported to EPA under 40 CFR 98, Subpart C and methane emissions stated as CO2e as reported under Subpart W. Total EPA-reported DEOH storage station (Chippewa and Robinson) emissions including Subpart C.

3. Convential Air Emissions from Transmission and Storage Compression
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
3.1 Emissions reported for all permitted sources (minor or major) The number of permitted sources for conventional emissions may not be the same number of sources reporting under the EPA GHG reporting rule.  Companies may wish to describe which, or how many, sources are included in the conventional pollutants data and whether the CO2e data reported includes all of these sources.
3.1.1 NOx (metric tons per year) 206 174 From DEOH (Chippewa, Robinson, and Switzerland).
3.1.2 VOC (metric tons per year) 63 52 From DEOH (From DEOH (Chippewa, Robinson, and Switzerland).

Natural Gas Gathering & Boosting


1. Methane Emissions
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
1.1 Gathering and Boosting Pipelines, Blow Down Volumes, and Emissions
1.1.1 Total Miles of Gathering Pipeline Operated by gas utility (miles) 838 844 DEOH is the only EPA-reported G&B utility facility.
1.1.2 Volume of Gathering Pipeline Blow Down Emissions (scf) N/A N/A This metric is collected to support calculations under EPA 40 CFR 98, Subpart W. Not reported to EPA.
1.1.4 Gathering Pipeline Blow-Down Emissions outside storage and compression facilities (metric tons CO2e) 84 84 DEOH is the only EPA-reported G&B utility facility.

2. CO2e Combustion Emissions for Gathering & Boosting Compression
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
2.1 CO2e Emissions for Gathering & Boosting Compression Stations (metric tons) 43,108 53,046 CO2 combustion emissions as reported to EPA under 40 CFR 98, Subpart C, as directed in Subpart W, 98.232(k). There is no Subpart C for G&B. Combustion emissions are reported under Subpart W. The value represents DEOH G&B emissions reported to EPA under Subpart W.

3. Conventional Combusion Emissions from Gathering & Boosting Compression
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
3.1 Emissions reported for all permitted sources (minor or major) The number of permitted sources for conventional emissions may not be the same number of sources reporting under the EPA GHG reporting rule.  Companies may wish to describe which, or how many, sources are included in the conventional pollutants data and whether the CO2e data reported includes all of these sources.
3.1.1 NOx (metric tons per year) 181 Emissions reported to the state of Ohio for the following DEOH G&B stations: Austintown, Cambridge, and Pike.
3.1.2 VOC (metric tons per year) 18 Emissions reported to the state of Ohio for the following DEOH G&B stations: Austintown, Cambridge, and Pike.

Dominion Energy Utility and Non-Utility T&S Voluntary Sustainability Metrics: Quantitative Information

Disclaimer: All information below is being provided on a voluntary basis, and as such, companies may elect to include or exclude any of the topics outlined below and customize the template to their specific needs. The decision to include data for historical and future years is at the discretion of each company and the specific years (e.g., historical baseline) should be chosen as appropriate for each company.

Parent Company Dominion Energy Inc (Transmission and Storage)
Operating Company(s) DETI, DECGT, DEQP, DEOH
Business Type(s) Vertically integrated
State(s) of Operation VA, PA, WV, OH, MD, NY, SC, UT, WY, CO
Regulatory Environment Unregulated
Note: Data from operating companies is rolled up to the corporate level.
Report Date 12/31/2018

Methane Emissions from Natural Gas Transmission & Storage


1. Transmission Pipelines Blowdowns (between compressor station)
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
1.1 Transmission Pipeline Miles Represented in EPA Subpart W Transmission Pipeline Blowdown Reports 3,887 6,056 As reported to EPA under 40 CFR 98, Subpart W. DETI and DEQP are the only companies that triggered the GHGRP, Subpart W, threshold in 2018.
1.2 Transmission Pipeline Blowdowns (metric tons CH4) 7,617 7,741 As reported to EPA under 40 CFR 98, Subpart W. DETI and DEQP only.
1.3 Transmission Pipeline Natural Gas Throughput (mscf) 3,592,799,547 5,504,485,551 As reported to EPA under 40 CFR 98, Subpart W, Quantity of natural gas received at all custody transfer stations in the calendar year (mscf) plus net storage withdrawals. DETI and DEQP only.
1.4 Methane Intensity of Blowdowns along Transmission Pipelines (between compressor stations) 0.0001 0.0001 (Row 1.2 divided by density of CH4)/(Row 1.3 times 0.95 percent CH4 in gas) Similar methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.

2. Transmission & Storage Compressor Stations
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
2.1 Number of Stations represented in EPA Subpart W T&S Reports 28 31 As reported to EPA under 40 CFR 98, Subpart W, counting each station separately, even if reporting with another station as a co-located facility. 23 Transmission Stations, 8 Storage, from DETI, DECGT, DEOH, and DEQP.
2.2 Transmission & Storage Compressor Station Emissions (metric tons CH4) 3,886 5,913 As reported to EPA under 40 CFR 98, Subpart W, CH4 only. Total EPA-reported DETI, DECGT, DEQP and DEOH T&S station CH4 emissions. Same methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.
2.3 Storage Pool Wellhead Component Fugitive Emissions (metric tons CH4) 325 282 Utilizing EPA emissions factors, as reported to EPA under Subpart W, 40 CFR 98.236, on the e-GRRT integrated reporting form, "Equipment Leaks Surveys and Population Counts [98.236 (q, r)]" tab. Total EPA-reported DETI, DEQP, and DEOH storage station wellhead CH4 emissions.
2.3 Transmission and Storage Station Combined Natural Gas Throughput (mscf) 3,591,972,569 2,526,550,111 As reported to EPA under 40 CFR 98, Subpart W, Quantity of natural gas received at all custody transfer stations in the calendar year (mscf). Similar methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.
2.4 Methane Intensity from T&S Compressor Stations 0.0001 0.0001 (Row 2.2 divided by density of CH4)/(Row 2.3 times 0.95 percent CH4 in gas) Similar methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.

Dominion Energy Utility and Non-Utility Gathering Voluntary Sustainability Metrics: Quantitative Information

Disclaimer: All information below is being provided on a voluntary basis, and as such, companies may elect to include or exclude any of the topics outlined below and customize the template to their specific needs. The decision to include data for historical and future years is at the discretion of each company and the specific years (e.g., historical baseline) should be chosen as appropriate for each company.

Parent Company Dominion Energy Inc (Gathering & Boosting)
Operating Company(s) DETI, DEOH, DEWexpro
Business Type(s) Vertically integrated
State(s) of Operation PA, WV, UT, WY, CO
Regulatory Environment Unregulated
Note: Data from operating companies is rolled up to the corporate level.
Report Date 12/31/2018

Methane Emissions from Natural Gas Gathering & Boosting


1. Gathering and Boosting Basin Emissions
Ref. No. Metric Year
2017
Year
2018
Definitions Comments
1.1 Gathering Pipeline Miles represented in EPA Subpart W G&B Reports 4,067 4,047 As reported to EPA under 40 CFR 98, Subpart W. For EPA-reported G&B basins reported under DETI, DEOH, and DEWexpro.
1.2 Number of geologic basin represented in EPA Subpart W G&B Reports 3 3 As reported to EPA under 40 CFR 98, Subpart W. Green River Basin (535), Appalachian Basin (160), and Appalachian Basin (Eastern Overthrust) (160A).
1.3 Gathering and Boosting Emissions (metric tons CH4) 2,768 4,206 As reported to EPA under 40 CFR 98, Subpart W, CH4 only. For EPA-reported G&B basins reported under DETI, DEOH, and DEWexpro. Same methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.
1.4 Throughput of Natural Gas through Gathering & Boosting 362,442,426 255,044,846 Gas received by G&B facilities, as reported to EPA under 40 CFR 98, Subpart W. For EPA-reported G&B basins reported under DETI, DEOH, and DEWexpro. Similar methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.
1.5 Methane Intensity of Gathering & Boosting 0.0004 0.0009 (Row 2.2 divided by density of CH4)/(Row 2.3 times 0.95 percent CH4 in gas) Similar methodology to be used for 2019 Methane Management Report (2018 data) intensity calculations.
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