El Paso Natural Gas Company

Second Revised Volume No. 1A

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

Fourth Revised Sheet No. 147D Fourth Revised Sheet No. 147D

Superseding: Third Revised Sheet No. 147D

RATE SCHEDULE ISS

Interruptible Storage Service

(Continued)

3. CONDITIONS OF SERVICE (Continued)

3.2(b) (Continued)

(i) Should Transporter receive a valid nomination complying

with a notification to withdraw but be unable to confirm

or schedule such nomination, the obligation of Shipper to

comply with that notification, but not the obligation to

submit nominations, shall be suspended until such time as

Transporter's operational conditions permit such

nomination to be confirmed and scheduled.

(ii) Unless otherwise agreed by Transporter and Shipper, any

storage inventory not nominated for withdrawal within the

period of time specified by Transporter shall become the

property of Transporter at no cost to Transporter and

free and clear of any adverse claims.

4. RATE

Shipper shall pay to Transporter each Month the charges set forth

below under the Executed ISS TSA.

4.1 Transporter, at its sole discretion, may from time to time and at

any time, selectively discount any or all of the rates stated below

applicable to any individual Shipper; provided, however, that such

adjusted rate(s) shall not exceed the applicable maximum rate(s) nor

shall they be less than the minimum rate(s) set forth on the

currently effective Statement of Rates.

4.2 Shipper shall pay, unless otherwise provided in the ISS TSA, the

maximum rate(s) per dth set forth from time to time on the

applicable Statement of Rates. Shipper shall pay an amount

obtained by multiplying the average daily balance of gas stored by

Transporter for Shipper's account during the Month by the

applicable storage inventory rate.