Southwest Gas Storage Company

First Revised Volume No. 1

Effective Date: 05/17/2009, Docket: RP09-514-000, Status: Effective

Second Revised Sheet No. 101 Second Revised Sheet No. 101

Superseding: First Revised Sheet No. 101

GENERAL TERMS AND CONDITIONS

The following General Terms and Conditions are applicable to all services

provided herein:

1. DEFINITIONS

"Average Storage Gas Balance" shall mean the sum of the daily

Storage Gas Balance divided by the number of Days in a particular

Month.

"Business Day" shall mean Monday through Friday from 8:00 a.m. to

5:00 p.m. Central Time, excluding Federal Banking Holidays.

"Central Time" shall mean Central Clock Time, whether Central

Standard Time or Central Daylight Savings Time.

"Commission" or "FERC" shall mean the Federal Energy Regulatory

Commission or any successor regulatory agency.

"Day" shall mean a period of twenty-four (24) consecutive

hours beginning and ending at 9:00 a.m. Central Time. The

reference date for any Day shall be the date of the beginning

of such Day.

"Dekatherm (Dt)" shall mean one thousand cubic feet of gas (Mcf)

with a heat content of 1,000 Btu per cubic foot on a measurement

basis specified under Section 9.2 herein and based on the same

pressure base as the volumes.

"East Area Storage Facilities" shall mean those storage facilities

owned by Southwest and known as the Howell Storage Field located in

Livingston County, Michigan and the Waverly Storage Field located in

Morgan and Sangamon Counties, Illinois.

"Electronic Gas Measurement (EGM)" shall mean that form of

measurement equipment used by Southwest which may consist of a

computerized remote terminal unit, transducers and other

associated power, radio and sensing and other electronic devices

to accomplish gas measurement and the transfer of data, without

the use of charts.