Transcontinental Gas Pipe Line Company, LLC

Fourth Revised Volume No. 1

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Effective Date: 12/31/2008, Docket: RP09-158-000, Status: Effective

Original Sheet No. 473 Original Sheet No. 473









51.1 (a) (ii) Pipeline Undersupply Notice - Upon issuance of a Pipeline Undersupply

Notice, to the extent actual receipt quantities are less than scheduled

receipt quantities by more than the Variance Notice Tolerance Percentage

defined in Section 51.1(d) below, following the applicable notice period

defined in Section 51.1(c) below, the difference in gas quantities

between the Tolerance Percentage and the actual receipt quantities shall

be subject to the Variance Notice Penalty set forth in Section 51.1(e)



(b) Circumstances giving rise to a Variance Notice - Seller shall issue a Pipeline

Oversupply Notice or Pipeline Undersupply Notice to prevent the impairment of

normal levels of service flexibility to Buyers under one or more of Seller's

rate schedules, only if a variance at a receipt point is in excess of 15% of

scheduled quantity or a variance in the portion of the system affected by the

Variance Notice is in excess of 10% of total scheduled quantity; and, one or

more of the following conditions occur:


(i) Seller has taken one or more of the following steps in the affected

portion(s) of the system:


(1) reducing the allowable Pool scheduling tolerance to less than 4%;


(2) reducing to zero any additional quantities of ISS or PAL service



(3) reducing to zero the quantity of excess storage injection or

withdrawal available to Buyers of firm storage services; or


(4) reducing to zero the use of makeup transactions necessary for

imbalance management, or


(ii) Seller reasonably anticipates the onset of weather conditions on the

system which, in Seller's sole judgment, would impair service to Buyers

under one or more of Seller's rate schedules by jeopardizing the

operational flexibility of Seller's system, or


(iii) Seller determines, in its sole judgment, that an operator's ability to

tender scheduled quantities of gas to Seller is materially affected by a

high pressure situation caused, in whole or in substantial part, by the

variance that prompted the Variance Notice.


(c) Notice. Seller shall post a notice on 1Line (and make reasonable efforts to

provide notice by facsimile, e-mail and/or telephone, as requested by Buyer) to

all affected Buyers, Receipt Point Operators and Receipt Point OBA Parties that

a Variance Notice will become effective. The notice will be posted no later

than 4:00 p.m. on the day prior to the gas day for which the Variance Notice

will be effective.


When Seller determines in its sole discretion that the operational flexibility

of the system is no longer jeopardized, the Variance Notice will be rescinded

and Seller shall post notice on 1Line (and make reasonable efforts to provide

notice by facsimile, e-mail and/or telephone, as requested by Buyer).