Philip H. Peacock Uses in Notice Clause

Notice from Purchase Agreement

This Interest Swap and Purchase Agreement (this Agreement), dated February 9, 2017 (the Execution Date), is by and among Western Gas Partners, LP, a Delaware limited partnership (WES), WGR Operating, LP, a Delaware limited partnership (WGR), Delaware Basin JV Gathering LLC, a Delaware limited liability company (DBJV), Williams Partners L.P., a Delaware limited partnership (WPZ), Williams Midstream Gas Services LLC, an Oklahoma limited liability company (WMGS), and Appalachia Midstream Services, L.L.C., an Oklahoma limited liability company (AMS). WPZ, WMGS and AMS are sometimes individually referred to herein as a Williams Party and collectively as the Williams Parties. WES, WGR and DBJV are sometimes individually referred to herein as a WES Party and collectively as the WES Parties. The Williams Parties and the WES Parties are sometimes referred to individually as a Party and collectively as the Parties.

Notice. All notices which are required or may be given pursuant to this Agreement must be given in writing and delivered personally, by courier, or by scanned document transmitted by email (with written confirmation of delivery) or by registered or certified mail, postage prepaid, as follows: If to the WES Parties: c/o Western Gas Partners, LP 1201 Lake Robbins Drive The Woodlands, Texas 77380 (hand delivery) P.O. Box 1330 Houston, Texas 77251-1330 (mail) Attn: Donald R. Sinclair Phone: 832-636-1221 Email: don.sinclair@anadarko.com With a copy to: c/o Western Gas Partners, LP 1201 Lake Robbins Drive The Woodlands, Texas 77380 (hand delivery) P.O. Box 1330 Houston, Texas 77251-1330 (mail) Attn: Philip H. Peacock Phone: 832-636-2439 Email: philip.peacock@anadarko.com If to Williams Parties: Williams Partners L.P. One Williams Center, Suite 4700 Tulsa, Oklahoma 74172-0172 Attention: John Gammie, Assistant General Counsel Phone: 918-573-2459 Email: john.gammie@williams.com With a copy to: Conner & Winters, LLP 4000 One Williams Center Tulsa, OK 74172-0148 Attention: J. Ryan Sacra Email: rsacra@cwlaw.com Either Party may change its address for notices by giving notice to the other Party in the manner set forth above. All notices shall be deemed to have been duly given at the time of receipt by the Party to which such notice is addressed.

Notice from Purchase Agreement

This Interest Swap and Purchase Agreement (this Agreement), dated February 9, 2017 (the Execution Date), is by and among Western Gas Partners, LP, a Delaware limited partnership (WES), WGR Operating, LP, a Delaware limited partnership (WGR), Delaware Basin JV Gathering LLC, a Delaware limited liability company (DBJV), Williams Partners L.P., a Delaware limited partnership (WPZ), Williams Midstream Gas Services LLC, an Oklahoma limited liability company (WMGS), and Appalachia Midstream Services, L.L.C., an Oklahoma limited liability company (AMS). WPZ, WMGS and AMS are sometimes individually referred to herein as a Williams Party and collectively as the Williams Parties. WES, WGR and DBJV are sometimes individually referred to herein as a WES Party and collectively as the WES Parties. The Williams Parties and the WES Parties are sometimes referred to individually as a Party and collectively as the Parties.

Notice. All notices which are required or may be given pursuant to this Agreement must be given in writing and delivered personally, by courier, or by scanned document transmitted by email (with written confirmation of delivery) or by registered or certified mail, postage prepaid, as follows: If to the WES Parties: c/o Western Gas Partners, LP 1201 Lake Robbins Drive The Woodlands, Texas 77380 (hand delivery) P.O. Box 1330 Houston, Texas 77251-1330 (mail) Attn: Donald R. Sinclair Phone: 832-636-1221 Email: don.sinclair@anadarko.com With a copy to: c/o Western Gas Partners, LP 1201 Lake Robbins Drive The Woodlands, Texas 77380 (hand delivery) P.O. Box 1330 Houston, Texas 77251-1330 (mail) Attn: Philip H. Peacock Phone: 832-636-2439 Email: philip.peacock@anadarko.com If to Williams Parties: Williams Partners L.P. One Williams Center, Suite 4700 Tulsa, Oklahoma 74172-0172 Attention: John Gammie, Assistant General Counsel Phone: 918-573-2459 Email: john.gammie@williams.com With a copy to: Conner & Winters, LLP 4000 One Williams Center Tulsa, OK 74172-0148 Attention: J. Ryan Sacra Email: rsacra@cwlaw.com Either Party may change its address for notices by giving notice to the other Party in the manner set forth above. All notices shall be deemed to have been duly given at the time of receipt by the Party to which such notice is addressed.

Notice from Purchase Agreement

This Interest Swap and Purchase Agreement (this "Agreement"), dated February 9, 2017 (the "Execution Date"), is by and among Western Gas Partners, LP, a Delaware limited partnership ("WES"), WGR Operating, LP, a Delaware limited partnership ("WGR"), Delaware Basin JV Gathering LLC, a Delaware limited liability company ("DBJV"), Williams Partners L.P., a Delaware limited partnership ("WPZ"), Williams Midstream Gas Services LLC, an Oklahoma limited liability company ("WMGS"), and Appalachia Midstream Services, L.L.C., an Oklahoma limited liability company ("AMS"). WPZ, WMGS and AMS are sometimes individually referred to herein as a "Williams Party" and collectively as the "Williams Parties." WES, WGR and DBJV are sometimes individually referred to herein as a "WES Party" and collectively as the "WES Parties." The Williams Parties and the WES Parties are sometimes referred to individually as a "Party" and collectively as the "Parties."

Notice. All notices which are required or may be given pursuant to this Agreement must be given in writing and delivered personally, by courier, or by scanned document transmitted by email (with written confirmation of delivery) or by registered or certified mail, postage prepaid, as follows: If to the WES Parties: c/o Western Gas Partners, LP1201 Lake Robbins DriveThe Woodlands, Texas 77380 (hand delivery)P.O. Box 1330Houston, Texas 77251-1330 (mail)Attn: Donald R. SinclairPhone: 832-636-1221Email: don.sinclair@anadarko.comWith a copy to:c/o Western Gas Partners, LP1201 Lake Robbins DriveThe Woodlands, Texas 77380 (hand delivery)P.O. Box 1330Houston, Texas 77251-1330 (mail)Attn: Philip H. PeacockPhone: 832-636-2439Email: philip.peacock@anadarko.com If to Williams Parties: Williams Partners L.P.One Williams Center, Suite 4700Tulsa, Oklahoma 74172-0172Attention: John Gammie, Assistant General CounselPhone: 918-573-2459Email: john.gammie@williams.comWith a copy to:Conner & Winters, LLP4000 One Williams CenterTulsa, OK 74172-0148Attention: J. Ryan SacraEmail: rsacra@cwlaw.comEither Party may change its address for notices by giving notice to the other Party in the manner set forth above. All notices shall be deemed to have been duly given at the time of receipt by the Party to which such notice is addressed.