Williams Natural Gas Company

Second Revised Volume No. 1

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

Original Sheet No. 133 Original Sheet No. 133 : Superseded

FSS RATE SCHEDULE

Firm Storage Service

5. MONTHLY BILL (Cont'd)

(4) The Withdrawal Charge shall be the product of (i) the total

quantities withdrawn and (ii) the Withdrawal Rate, plus any

applicable commodity surcharges.

(b) The bill will include any Authorized Overrun Service charge

determined pursuant to Section 6 of this rate schedule.

penalties determined pursuant to Article 9 of the General Terms

and Conditions.

6. AUTHORIZED OVERRUN SERVICE

Service under this rate schedule on any day shall not exceed the MDIQ

or MDWQ, as applicable; provided, however, WNG may, at the request of

Shipper, inject or withdraw on any day quantities in excess of the

MDIQ or MDWQ, respectively, to the extent in WNG's reasonable

judgment, the storage capacity of its system so permits without

impairing the ability of WNG to meet its full obligations of its firm

service customers. The applicable rate for any such overrun service

shall be as stated on effective Tariff Sheet No. 6 or 6A. Such

authorized overrun service shall be subject to the same operating

terms and conditions as are extended to service provided under Rate

Schedule ISS and shall not interrupt flowing FSS service or the

storage components of TSS or STS service; provided, however, that

Authorized Overrun Service shall have a lower priority for scheduling

and curtailment purposes than injections or withdrawals under Rate

Schedule ISS. The authorized overrun charge shall only be charged if

the MDIQ or MDWQ is exceeded under any service agreement.

7. STORAGE OPERATIONS

(a) All storage fields will be operated as a pool with WNG retaining

full operational control.

(b) Monthly imbalances under all transportation agreements with each

Shipper may be injected into or withdrawn from storage under that

shipper's storage agreement, as provided in Article 9 of the

General Terms and Conditions, subject to the availability of

storage capacity or storage inventory, as appropriate, up to the

MSQ.