Dominion Transmission, Inc.

Third Revised Volume No. 1

Effective Date: 09/23/2000, Docket: RP00-555-000, Status: Effective

Original Sheet No. 505 Original Sheet No. 505 : Effective

ISS RATE SCHEDULE

Interruptible Storage Service

6.3 The notice given by Customer to Pipeline for injections on

any Day shall be that required for nominations under

Section 11A of the General Terms and Conditions.

6.4 Customer may nominate to Pipeline under Section 6.2 above

quantities for injection that are in addition to Customer's

MDIQ. Additional storage injections shall include gas

injected into storage under Rate Schedule FTNN, to the

extent such injections exceed Customer's MDIQ. Pipeline

shall endeavor to inject such additional quantities to the

extent confirmed, on an interruptible basis, subject to the

scheduling provisions of Section 11A.4 of the General Terms

and Conditions and subject to Customer's payment of the

applicable Excess Injection Charge.

6.5 In addition to Pipeline's rights of interruption hereunder,

Pipeline may issue an operational flow order pursuant to

Section 11B of the General Terms and Conditions of this

Tariff, governing Winter Period injections under this Rate

Schedule ISS. While such operational flow order is in

effect:

A. From time to time, Pipeline may post on its Electronic

Bulletin Board any ISS Point(s) at which eligible

Customers may tender quantities for injection, and any

conditions applicable to injection through such

points.

B. Pipeline may limit or refuse to accept injections not

tendered in accordance with the operational flow order

and EBB notice.

6.6 Pipeline shall be obligated to inject gas into storage for

Customer's account only when Customer's Storage Gas Balance

is less than the MSQ

7. WITHDRAWALS FROM STORAGE

7.1 Each executed Service Agreement shall specify the ISS Point

for all gas withdrawn from storage. The ISS Point shall be

deemed to be a Primary Delivery Point, within the meaning

set forth in the General Terms and Conditions of this

Tariff.