PetroLogistics Natural Gas Storage LLC

Original Volume No. 1

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Effective Date: 09/27/2010, Docket: RP10-1113-000, Status: Effective

First Revised Sheet No. 13 First Revised Sheet No. 13

Superseding: Superseding Original Sheet No. 13

rights under an FSS Service Agreement, such release shall not change the existing ratio of the

MSQ and the Maximum Daily Withdrawal Quantity/Maximum Daily Injection Quantity (MDWQ/MDIQ)

2.3 Shipper shall have the option of providing a quantity of Base Gas, as set forth in Exhibit

A of Shipper's FSS Service Agreement.

2.4 Shipper shall be permitted to combine the firm injection, storage or withdrawal of gas available

under this FSS Rate Schedule in any combination of the components of this service and with any other

services available under any other Rate Schedules set forth in this FERC Gas Tariff; and, provided,

further, that priority for each such service shall be determined by the respective priority of the

service as set forth in Section 7 of the General Terms and Conditions of this FERC Gas Tariff.

3. OVERRUN SERVICE

3.1 Shipper may submit a nomination for injections in excess of its MDIQ or MHIQ ("Excess Injection

Gas"), withdrawals in excess of its MDWQ or MHWQ ("Excess Withdrawal Gas") or storage in excess of its

MSQ ("Authorized Overrun Service"). In the event that Shipper makes such a nomination, PetroLogistics

will schedule and confirm (i) the request to the extent that additional flexibility exists during the

time period of the request in accordance with Section 7.2 of the General Terms and Conditions, and

(ii) using reasonable discretion, that PetroLogistics can accommodate the request without detriment to

PetroLogistics' facilities and/or PetroLogistics' ability to meet its firm obligations to other Shippers.

3.2 PetroLogistics shall have the right to interrupt all or part of these authorized overrun

quantities nominated as the operation of its facilities may require in PetroLogistics' reasonable

judgment, subject to Section 7 of the General Terms and Conditions of this Tariff.

4. RATES AND CHARGES

4.1 The charges to be paid by Shipper shall be mutually agreed to by PetroLogistics and Shipper. For

all service rendered under this Rate Schedule, each Month, Shipper shall pay PetroLogistics the charges

set forth below, unless otherwise mutually agreed to by PetroLogistics and Shipper and specified in

Shipper's FSS Service Agreement.

(a) Storage Reservation Charge. A charge, as set forth in Exhibit A of Shipper's FSS Service

Agreement, for each Dth per Month of Shipper's MSQ.

(b) Injection Charge. A usage charge, as set forth in Exhibit A of Shipper's FSS Service

Agreement, for each Dth injected per Month, for Shipper's account, into PetroLogistics' facilities

pursuant to Section 2.1(a) of this Rate Schedule.

(c) Withdrawal Charge. A usage charge, as set forth in Exhibit A of Shipper's FSS Service

Agreement, for each Dth withdrawn per Month, for Shipper's account, from PetroLogistics' facilities

pursuant to Section 2.1(b) of this Rate Schedule.

(d) Excess Injection Charge. A usage charge, as set forth in Exhibit A of Shipper's FSS Service

Agreement, for each Dth injected per Month, for Shipper's account, as Excess Injection Gas by

Shipper pursuant to Section 3 of this Rate Schedule.

(e) Excess Withdrawal Charge. A usage charge, as set forth in Exhibit A of Shipper's FSS service

Agreement, for each Dth withdrawn per Month, for Shipper's account, as Excess Withdrawal Gas by

Shipper pursuant to Section 3 of this Rate Schedule.

(f) Authorized Overrun Service Charge. A usage charge, as set forth in Exhibit A of Shipper's FSS

Service Agreement, for each Dth stored in excess of Shipper's MSQ per Month pursuant to Section 3

of this Rate Schedule.