Discovery Gas Transmission LLC

Original Volume No. 1

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Effective Date: 05/01/2010, Docket: RP10-539-000, Status: Effective

Third Revised Sheet No. 249 Third Revised Sheet No. 249

Superseding: Second Revised Sheet No. 249

FORM OF SERVICE AGREEMENT

APPLICABLE TO INTERRUPTIBLE TRANSPORTATION

SERVICE UNDER IT RATE SCHEDULE

EXHIBIT B

To The Interruptible

Transportation Service Agreement

Dated _________________

Between Discovery Gas Transmission LLC

And ___________________

Delivery Maximum

Pressure(s) Daily Quantity

Delivery Points (PSIG)* (Dt)**

[Mainline]

______________________ __________ __________

______________________ __________ __________

[Expansion ***]

______________________ __________ __________

______________________ __________ __________

[Shipper's Maximum Daily Transportation Quantity (MDTQ-Mainline):] _________

[Shipper's Maximum Daily Transportation Quantity (MDTQ-Expansion):] ________

*Necessary pressure to deliver Gas from the Mainline Facilities or Expansion

Facilities, as appropriate, on Transporter's System, not in excess of.

** Discovery's obligation to deliver Gas on the Mainline Facilities or receive

Gas on the Expansion Facilities for a Shipper is net of any shrinkage of the

Shipper's Gas as a result of the processing performed on the Gas prior to its

delivery or receipt by Discovery.

[*** Delivery to the Transco delivery point is subject to Transporter's lease

of capacity from Texas Eastern Transmission, LP.]