Case 20-31920 Document 354 Filed in TXSB on 09/28/20 Page 1 of 4

IN THE UNITED STATES BANKRUPTCY COURT FOR THE SOUTHERN DISTRICT OF TEXAS

In re: ) Chapter 11 ) ECHO ENERGY PARTNERS I, LLC ) Case No. 20-31920 (DRJ) ) Debtor. )

CERTIFICATE OF SERVICE

I, Julian A. Del Toro, depose and say that I am employed by Stretto, the claims and noticing agent for the Debtors in the above-captioned cases.

On September 28, 2020 at my direction and under my supervision, employees of Stretto caused the following documents to be served via electronic mail on the service list attached hereto as Exhibit A:

• Hearing Agenda for Tuesday, September 29, 2020 Hearing (Docket No. 350)

• Declaration of Voting Agent Regarding Solicitation and Tabulation of Votes in Connection with the Debtor’s Chapter 11 Plan of Liquidation (Docket No. 351)

• Declaration of Gregg Laswell in Support of Final Approval of Disclosure Statement and Confirmation of the Debtor’s Chapter 11 Plan of Liquidation (Docket No. 352)

• Notice of Filing a Revised Proposed Confirmation Order (Docket No. 353)

Dated: September 28, 2020 /s/ Julian A. Del Toro Julian A. Del Toro STRETTO 410 Exchange, Suite 100 Irvine, CA 92602 Telephone: 855-422-8458 Email:[email protected] Case 20-31920 Document 354 Filed in TXSB on 09/28/20 Page 2 of 4

Exhibit A

Case 20-31920 Document 354 Filed in TXSB on 09/28/20 Page 3 of 4

Exhibit A Served Via Electronic Mail

Name Attention Address 1 Email Acacia Energy Partners LLC Clayton Flurry [email protected] [email protected] Acacia Energy Partners, LLC c/o Foley Gardere, Foley & Lardner LLP Attn: Stephen A. McCartin and Melina Bales [email protected] Apache Corporation Jay Buckley [email protected] BP America Production Company c/o Liskow & Lewis Attn: Michael D. Rubenstein [email protected] BP America Production Company Wender Moreno wender.moreno1@bp.com Camino Natural Resources LLC Mark Brown [email protected] Casillas Operating LLC Zach Malchi [email protected] Chaparral Energy LLC Justin P. Byrne, General Counsel [email protected] Cheyenne & Arapaho Tribes Tax Commission Oil & Gas Division [email protected] Cimarex Energy Company Kevin Smith [email protected] [email protected] Citation Oil and Gas Corp Matthew Thompson [email protected] Citizen Energy II LLC [email protected] Citizen Energy III LLC Curtis Johnson [email protected] Continental Resources Inc. Brooks Richardson [email protected] Devon Energy Production Company LP Amy Carpenter [email protected] [email protected] Echo E&P, LLC and Echo Energy, LLC c/o Sidley Austin LLP Attn: Duston McFaul and Maegan Quejada [email protected] Enable Gathering & Processing LLC Andy Bush [email protected] EOG Resources Inc. Dax Taylor [email protected] Gaedeke Oil & Gas Operating L.L.C. Brenda Loftis [email protected] Gaedeke Oil & Gas Operating, LLC c/o Pronske & Kathman, P.C. Attn: Gerrit M. Pronske [email protected] Gulfport Midcon LLC Rebecca Addison [email protected] Harris County c/o Linebarger Goggan Blair & Sampson, LLP Attn: John P. Dillman [email protected] [email protected] Matthew D. Cavenaugh, Elizabeth C. Freeman, [email protected] Jackson Walker LLP and Victoria Argeroplos [email protected] Jones Energy LLC Scott Van Sickle [email protected] Kirkland & Ellis LLP and Kirkland & Ellis International [email protected] LLP Anna G. Rotman and Jamie A. Aycock [email protected] Kirkland & Ellis LLP and Kirkland & Ellis International LLP Joshua A. Sussberg [email protected] Lime Rock Resources Operating Company Melissa Bell [email protected] [email protected] Marathon Oil Company c/o Bonds Ellis Eppich Schafer Jones LLP Attn: Clay M. Taylor and J. Robertson Clarke [email protected] Marathon Oil Company Todd Richards [email protected] [email protected] Office of the United States Trustee Hector Duran, Jr & Stephen Douglas Statham [email protected] Oklahoma County Treasurer Attn: Tammy Jones [email protected] Ovintiv Mid Continent Inc. Sarah Robertson [email protected] Paloma Partners IV LLC Lynn Graves [email protected] [email protected] Pivotal Petroleum Partners II LP c/o Haynes and Boone, LLP Attn: Patrick L. Hughes & David Trausch [email protected] Red Bluff Resources Operating LLC Andrew Jennings [email protected] Red Rocks Oil & Gas Operating LLC Randy Stalcup [email protected]

In re: Echo Energy Partners I, LLC Case No. 20-31920 (DRJ) Page 1 of 2 Case 20-31920 Document 354 Filed in TXSB on 09/28/20 Page 4 of 4

Exhibit A Served Via Electronic Mail

Name Attention Address 1 Email Red Wolf Operating LLC Jay Buckley [email protected] Roan Resources LLC Curtis Johnson [email protected] Sandridge Exploration & Production LLC [email protected] Staghorn Petroleum II LLC [email protected] Tapstone Energy LLC [email protected] TEP Anadarko Basin Operating, LLC c/o Snow Spence Green LLP Attn: Kenneth P Green [email protected] TEP Anadarko Basin South III, LLC, TEP Anadarko Basin South IV, LLC and VP Stack 1, LLC c/o Snow Spence Green LLP Attn: Kenneth P. Green [email protected] Texas Capital Bank, N.A. as Lender and Attn: Joseph J. Wielebinski and Annmarie [email protected] Administrative Agent c/o Winstead PC Chiarello [email protected] Triumph Energy Partners LLC [email protected] TRP Operating LLC Joey Bernica [email protected] U.S. Attorney's Office Southern District of Texas Unit Petroleum Company Jon Strickler [email protected] Warwick Jupiter LLC Michael Brown [email protected] Warwick-Jupiter, LLC c/o McAfee & Taft A Professional Corporation Attn: Steven W. Bugg [email protected] WesternGeco LLC c/o Gieger, Laborde & Laperouse, L.L.C. Attn: Andrew A. Braun [email protected] XTO Energy Inc. Noele Fischer [email protected]

In re: Echo Energy Partners I, LLC Case No. 20-31920 (DRJ) Page 2 of 2