Transcontinental Gas Pipe Line Company, LLC

Fourth Revised Volume No. 1

Effective Date: 07/12/2009, Docket: RP09-763-000, Status: Effective

First Revised Sheet No. 436 First Revised Sheet No. 436

Superseding: Original Sheet No. 436

GENERAL TERMS AND CONDITIONS

(Continued)

37. CASH OUT PROVISIONS

37.1 Each month Buyer's or OBA Party's applicable imbalances remaining at the end of the

trading period pursuant to Section 25 of the General Terms and Conditions shall be

cashed out by zone within an OIA as set forth herein.

(a) Seller, paying the "Buy" price for imbalances "Due To" Buyer or OBA Party; or

Buyer or OBA Party paying the "Sell" price for imbalances "Due From" Buyer or OBA

Party, shall cash out the imbalance at the applicable current Reference Spot

Price "Buy/Sell" established for each zone within an OIA on Seller's system as

set forth below:

(i) The Reference Spot Prices for each week in each zone within an OIA will be

as follows:

Reference Spot Price Zone 1 - Natural Gas Week* Transco Sta. 30 Price from

Natural Gas Weekly Spot Prices

Reference Spot Price Zone 2 - Natural Gas Week* Transco Sta. 45 Price from

Natural Gas Weekly Spot Prices

Reference Spot Price Zone 3 - Natural Gas Week* Transco Sta. 65 Price from

Natural Gas Weekly Spot Prices

Reference Spot Price Zone 4, 4A and 4B - Natural Gas Week* Transco Zone 4

Price from Natural Gas Weekly Spot Prices

Reference Spot Price Zone 5 - Natural Gas Week* Columbia Appalachia Pooled

Price from Natural Gas Weekly Spot Prices

Reference Spot Price Zone 6 - Natural Gas Week* Dominion North Point Price

from Natural Gas Weekly Spot Prices. In the event that Natural Gas Week

does not publish a spot price for Dominion North Point in any given

week(s), Seller will use Natural Gas Week* Dominion South Point Price from

Natural Gas Weekly Spot Prices for such week(s).

Seller will use the prices from the "$/MMBTU" column reported in Natural

Gas Week* for each week of the month of gas flow and will also include

prices from the first weekly publication of the following month to

determine the Reference Spot Prices.

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* Natural Gas Week is published by the Energy Intelligence Group, Inc. In the event that

Natural Gas Week is no longer published, the successor Energy Intelligence Group, Inc.

publication shall be used.