PetroLogistics Natural Gas Storage LLC

Original Volume No. 1

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Effective Date: 06/03/2009, Docket: RP09-577-000, Status: Effective

Original Sheet No. 28 Original Sheet No. 28

RATE SCHEDULE IWS

INTERRUPTIBLE WHEELING SERVICE

1. AVAILABILITY

This Rate Schedule is available to any Shipper for the purchase of interruptible natural gas wheeling

("IWS") service from PetroLogistics, provided that:

(a) PetroLogistics has determined that it has sufficient operationally available interruptible wheeling,

receipt and delivery capacity to perform service requested by Shipper;

(b) PetroLogistics has determined that service requested by Shipper will not interfere with efficient

operation of its system or with higher priority services;

(c) Shipper and PetroLogistics have executed a Hub Services Agreement under this Rate Schedule;

(d) Shipper accepts responsibility for arranging any upstream and/or downstream transportation service

required for utilization of the wheeling service provided under this Rate Schedule; and

(e) Service under this Rate Schedule may not be available to the extent that PetroLogistics would be

required to construct, modify, expand or acquire any facilities to enable PetroLogistics to perform the

requested services.

2. APPLICABILITY AND CHARACTER OF SERVICE

2.1 This Rate Schedule shall apply to all IWS service rendered by PetroLogistics to Shipper at

PetroLogistics' facilities located in Iberville Parish, Louisiana, pursuant to an executed Hub Services

Agreement.

2.2 IWS service rendered by PetroLogistics to Shipper under this Rate Schedule shall consist of the

transportation of gas, on an interruptible basis, by PetroLogistics for Shipper on PetroLogistics' system

between agreed upon Point(s) of Receipt and Point(s) of Delivery.

2.3 PetroLogistics shall, on an interruptible basis, receive for Shipper at Point(s) of Receipt located

on PetroLogistics' system, and shall transport and deliver at the Point(s) of Delivery located on

PetroLogistics' system daily quantities of gas up to Shipper's interruptible Maximum Daily Wheeling Quantity;

provided, however, PetroLogistics shall not be obligated to receive, transport and/or deliver quantities of

gas on any Day in excess of the quantity nominated and scheduled for that Day.

2.4 Shipper shall be permitted to combine the IWS service available under this Rate Schedule with any

service available under any other Rate Schedule set forth in this FERC Gas Tariff; provided, however,

such combined service shall be subject to Section 7 of the General Terms and Conditions of this FERC Gas

Tariff; and, provided, further, that priority for each service shall be determined by the respective priority

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

2.5 The transportation of gas in amounts up to the Shipper's Maximum Daily Wheeling Quantity, as

specified in Exhibit B of the Shipper's Hub Services Agreement, shall be available only in the event that

all higher priority service needs have been satisfied.

3. RATES AND CHARGES

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

The rates and charges paid by Shipper for interruptible wheeling service under this Rate Schedule shall

include the applicable wheeling rate components set forth in the Rate Statement IWS and as described below: