Williams Natural Gas Company

Second Revised Volume No. 1

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

Original Sheet No. 137 Original Sheet No. 137 : Superseded

ISS RATE SCHEDULE

Interruptible Storage Service

4. RATE (Cont'd)

(d) WNG may charge any rate between the maximum and minimum rates

stated on Tariff Sheet No. 6 or 6A on a non-discriminatory basis.

Shipper's delivery of quantities to WNG after the effective date

of any discounted rates shall be deemed acceptance by Shipper of

such rates. Such rate will be established pursuant to Article 12

of the General Terms and Conditions. WNG shall file all required

reports with the Federal Energy Regulatory Commission.

(e) The charges for service under this rate schedule shall also

include any other allocated costs or surcharges permitted by the

Federal Energy Regulatory Commission.

(f) Storage fuel and loss is to be reimbursed in kind and will be

based upon quantities received for injection.

5. MONTHLY BILL

(a) The bill for storage service during each billing period under

this rate schedule shall be the applicable charges as follows:

(1) The Commodity Charge shall be the product of (i) the month-

end storage balance and (ii) the Commodity Rate, plus any

applicable surcharges.

(2) The Injection Charge shall be the product of (i) the total

quantities received for injection and (ii) the Injection

Rate, plus any applicable commodity surcharges.

(3) 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quantities withdrawn and (ii) the Withdrawal Rate, plus any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 may include any scheduling and balancing charges or

penalties determined pursuant to Article 9 of the General Terms

and Conditions.