El Paso Natural Gas Company

Second Revised Volume No. 1A

Effective Date: 04/01/2010, Docket: RP10-454-001, Status: Effective

First Revised Sheet No. 147C.02 First Revised Sheet No. 147C.02

Superseding: Original Sheet No. 147C.02

RATE SCHEDULE ISS

Interruptible Storage Service

(Continued)

2. APPLICABILITY AND CHARACTER OF SERVICE (Continued)

2.4 On any Gas Day, any TSA may be used to transport gas to and from

storage.

3. CONDITIONS OF SERVICE

3.1 Interruptible storage service must be nominated and confirmed to the

ISS TSA in accordance with the provisions of Section 6 of the GT&C.

3.2 Upon issuance of a notice of Critical Condition that affects

Transporter's use of pipeline capacity for higher priority services

or operational requirements, Transporter may require Shipper to 1)

suspend its injections into storage, 2) suspend its withdrawals from

storage, or 3) withdraw its storage inventory on an expedited basis.

Notification of the required activity shall be made pursuant to the

notification procedures of Section 6.1(a)(xii) of the GT&C.

(a) Such notification shall only be made when the required Shipper

action is necessary to protect the operational integrity and

flexibility of Transporter's pipeline system or to allow

Transporter to fulfill higher priority commitments.

(b) Upon notification by Transporter of required expedited storage

withdrawals, Shipper will be required to submit a nomination

pursuant to Section 6 of the GT&C in the next available

nomination cycle to withdraw, no later than the next Gas Day,

the greater of ten percent of Shipper's existing interruptible

inventory or 5,000 Dth. Withdrawals at the same rate on

subsequent Gas Days may also be required by Transporter.