PetroLogistics Natural Gas Storage LLC

Original Volume No. 1

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

Original Sheet No. 11 Original Sheet No. 11

RATE STATEMENT IBS – INTERRUPTIBLE BALANCING SERVICE*

Balancing Charge Market Based/ Negotiable $/Dth/time period

Balancing Injection Charge Market Based/ Negotiable $/Dth/time period

Balancing Withdrawal Charge Market Based/ Negotiable $/Dth/time period

Payment is equal to the Balancing Charge multiplied by Shipper's balance quantity, plus the

Balancing Injection Charge multiplied by the quantity injected, plus the Balancing Withdrawal

Charge multiplied by the quantity withdrawn, as applicable and specified in Exhibit B of

Shipper's Hub Services Agreement.

Fuel Retention Market Based/ Negotiable $/Dth or in kind

This amount of gas is to be reimbursed by Shipper in kind or in dollars per Dth as determined

pursuant to the General Terms and Conditions of this FERC Gas Tariff or Exhibit B of Shipper's

Hub Services Agreement.

Electric Power Costs for Compression

Actual pro rata cost (without markup) based on Shipper's receipt quantities.

All applicable taxes set forth in either the General Terms and Conditions of this FERC Gas Tariff

or the Service Agreement and all other applicable surcharges, including, but not limited to, the

ACA charges, shall also be paid by Shipper.

* All quantities of gas are measured in dekatherms (Dth).