Petal Gas Storage, L. L. C.

Original Volume No. 1

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Effective Date: 05/01/2002, Docket: RP02-188-000, Status: Effective

Second Revised Sheet No. 52 Second Revised Sheet No. 52 : Effective

Superseding: First Revised Sheet No. 52

ISS RATE SCHEDULE

INTERRUPTIBLE STORAGE SERVICE (Continued)

(d) Customer may not withdraw gas from storage in excess of the quantity of

Customer's gas which is stored.

(e) Petal shall have the right to interrupt all or part of the interruptible

and overrun quantity nominated as the operation of its storage

facilities may require pursuant to Section 4 of the General Terms and

Conditions of this Tariff in which event Petal shall notify Customer.

4. RATES AND CHARGES

The rates and charges paid by Customer for interruptible storage service under

this rate schedule shall include the applicable storage rate components set

forth in the ISS Rate Statement and as described below:

(a) Interruptible Storage Charge. A charge for each MMBtu of Customer's

Interruptible Storage Capacity, if a reservation fee is charged, or

Customer's inventory if a volumetric fee is charged. The charge may be

on a daily, monthly, or other basis per agreement between Customer and

Petal.

(b) Storage Injection Charge. A usage charge for each MMBtu of Customer's

gas injected into Petal's facilities pursuant to Section 2(a) of this

rate schedule during a given month.

(c) Overrun Injection Charge. A charge for each MMBtu of Customer's gas

injected into Petal's facilities pursuant to Section 3(a) of this rate

schedule during a given month.

(d) Storage Withdrawal Charge. A usage charge for each MMBtu of Customer's

gas withdrawn from Petal's facilities pursuant to Section 2(c) of this

rate schedule during a given month.

(e) Overrun Withdrawal Charge. A charge for each MMBtu of Customer's gas

withdrawn from Petal's facilities pursuant to Section 3(b) of this rate

schedule during a given month.