Gulfstream Natural Gas System, L.L.C.

Original Volume No. 1

Effective Date: 06/28/2010, Docket: RP10-792-000, Status: Effective

First Revised Sheet No. 8N First Revised Sheet No. 8N

Superseding: Sub Original Sheet No. 8N

STATEMENT OF NEGOTIATED RATES

Contract Contract Rate Reservation Usage Receipt Delivery

Shipper Number Term Schedule Rate 1/ 2/ Rate 1/ 2/ Points Points Quantity

------- -------- -------- -------- -------------- --------- --------- --------- --------

Calpine Energy Services, L.P. 5/

9006487 11/1/2003- FTS-6% 4/ $16.729 6/ $0.02 3/ MR 430 68,000 Dth MDQ

11/1/2023 (Calpine Osprey)

1/ Unless otherwise specified, the Reservation Rate is stated in $/Dth per Month. The Commodity/Usage Rate is stated in $/Dth delivered.

2/ In addition to the above referenced rates, Shipper shall pay all applicable charges or surcharges as provided for in Transporter's Tariff.

Shipper shall also provide a fuel and loss reimbursement as reflected on the Statement of Additional Charges and Surcharges, as revised from

time to time pursuant to Section 23 of the General Terms and Conditions of Transporter's Tariff.

3/ DIGP 20" Offshore Pipeline, Exxon/Mobil Maryann Plant, Williams Mobile Bay Processing Plant, Mobile Bay Processing Partners Plant, Destin

Pipeline, Gulf South Pipeline, and any receipt points added in the Mobile Bay, Alabama area.

4/ This is the Maximum Hourly Flow Rate.

5/ This negotiated rate agreement is a non-conforming service agreement.

6/ If Gulfstream (a) is a party to or hereafter becomes a party to any precedent agreement or service agreement with the same rate structure

(i.e., (1) negotiated, including discounts of the recourse rate; or (2) recourse) selected by Shipper with any third party for firm

transportation of gas on the Gulfstream Project (including, without limitation, any expansion of the Gulfstream Project) equivalent to the

service provided for in the Service Agreement, i.e., for (i) firm, forward haul transportation of gas into the State of Florida and (ii) for a

term of service equal to or shorter than the term of service provided for in the Service Agreement (collectively "Equivalent Service"), and

(b) pursuant to such third party precedent agreement or service agreement for Equivalent Service (with an MHQ equal to or greater than

Shipper's) is obligated to provide to such third party rates that are more favorable to such third party than the comparable rates to be

provided to Shipper under the Service Agreement, Gulfstream will promptly offer such more favorable rates to Shipper by way of an amendment to

the Service Agreement effective as of the date such more favorable rates will be provided to such third party. Moreover, to the extent

Gulfstream enters into a precedent or service agreement for Equivalent Service with any third party with the same rate structure selected by

Shipper (a) at a rate lower than that set forth herein or (b) for transportation service(s) with an MHQ different than that identified herein,

then Gulfstream will promptly offer such third party's rate and MHQ to Shipper by way of an amendment to the Service Agreement effective as of

the date such rate and MHQ will be provided to such third party. If Shipper elects to accept any such rate and MHQ within thirty (30) days of

Gulfstream's offer, then Gulfstream and Shipper shall expeditiously amend the Service Agreement to effectuate that new rate and MHQ; provided

that Shipper's MHQ shall not be reduced and provided further that any change in MHQ will be made subject to the availability of existing

capacity and subject to compliance with the generally applicable tariff procedures for service on the Gulfstream system. On each anniversary

of the date of Shipper's execution and delivery of the Service Agreement, Gulfstream shall deliver a notarized letter to Shipper confirming

that Gulfstream has not in the previous twelve months executed an agreement for firm transportation service, of which Gulfstream has not

previously notified Shipper, that contains a lower rate than that set forth in the Service Agreement. Any disputes regarding whether another

customer's rate is more favorable shall be submitted to arbitration.