Williams Natural Gas Company

Second Revised Volume No. 1

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Effective Date: 10/01/1993, Docket: RS92- 12-003, Status: Effective

Original Sheet No. 135 Original Sheet No. 135 : Superseded

ISS RATE SCHEDULE

Interruptible Storage Service

1. AVAILABILITY

This rate schedule is available to any party who has an effective FTS,

SFT or ITS Service Agreement under the following conditions:

(a) Shipper shall provide the information specified by Article 8 of

the General Terms and Conditions and Shipper shall execute an ISS

Service Agreement for service under this rate schedule in the

form provided in this Tariff.

(b) Notwithstanding any other provisions hereof, WNG shall inject,

store, and withdraw only such quantities of Shipper's gas which

WNG in its sole discretion determines it can so inject, store,

and withdraw after WNG has satisfied the total requirements of

its higher priority customers as defined in Article 9 of the

General Terms and Conditions; provided, however, that in no event

can the MSQ hereunder exceed 45 times the MDTQ of the associated

transportation service agreement(s).

(c) In the event WNG determines that a period of daily allocation or

capacity curtailment is required on its system, all deliveries

under Rate Schedule ISS may be reduced or discontinued in

accordance with Article 9 of the General Terms and Conditions.

2. APPLICABILITY AND CHARACTER OF SERVICE

(a) This rate schedule shall apply to all interruptible storage

service up to the Maximum Storage Quantity (MSQ) which is

rendered by WNG for Shipper pursuant to an executed ISS Service

Agreement.

(b) Storage Service under this rate schedule shall be interruptible

and shall consist of the acceptance and injection by WNG of

natural gas tendered by Shipper, the storage of such gas, and the

withdrawal and delivery of natural gas for Shipper's account.

(c) Gas stored under this rate schedule may be sold in place to other

parties having sufficient available Rate Schedules FSS or ISS

storage capacity. Parties wishing to make sales of gas in place

must obtain confirmation from WNG two (2) days prior to the

proposed effective date of such sale that the quantity proposed

to be sold is available and shall notify WNG in writing that such

sale has occurred by the effective date of the transaction.