Mississippi River Transmission Corp.

Third Revised Volume No. 1

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Effective Date: 11/01/1993, Docket: RS92- 43-004, Status: Effective

Original Sheet No. 52 Original Sheet No. 52 : Superseded

RATE SCHEDULE ISS

INTERRUPTIBLE STORAGE SERVICE

(Continued)

2. APPLICABILITY AND CHARACTER OF SERVICE (Continued)

2.5 Service under Rate Schedule ISS shall be provided through

the use of MRT's aggregated storage facilities. Customers shall not be

allocated capacity or deliverability from any one specific storage

facility.

2.6 All deliveries for injection into storage and all receipts

for withdrawal from storage shall be made at the Unionville Storage

Field receipt/delivery point.

3. INJECTION

3.1 Rate Schedule ISS Customers will be permitted to inject gas

into storage if MRT determines that interruptible storage capacity is

available. ISS injections will be subject to daily changes at MRT's

sole discretion.

4. WITHDRAWAL

4.1 Rate Schedule ISS Customers will be permitted to withdraw

gas from storage if storage deliverability is available. ISS

withdrawals will be subject to daily changes at MRT's sole discretion.

4.2 MRT can require the withdrawal of all Rate Schedule ISS

inventories on 30 days notice. Any Rate Schedule ISS volumes which are

not withdrawn within 30 days after MRT provides such notice shall be

forfeited to MRT, free and clear of any adverse claims.

4.3 Any Rate Schedule ISS volumes which remain in storage after

May 15 shall be automatically forfeited to MRT, free and clear of all

adverse claims.

4.4 In order to minimize the risk that Rate Schedule ISS

Customers will forfeit gas pursuant to Sections 4.2 and 4.3 of this rate

schedule, MRT will take the following steps: