Natural Gas Pipeline Company Of America

Seventh Revised Volume No. 1

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Effective Date: 04/18/2008, Docket: RP08-319-000, Status: Effective

Original Sheet No. 128 Original Sheet No. 128 : Pending

RATE SCHEDULE IBS

INTERRUPTIBLE BALANCING SERVICE

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1. AVAILABILITY

(a) This Rate Schedule IBS is available to any entity

(hereinafter called Shipper) which: (i) submits to Natural Gas

Pipeline Company of America LLC (hereinafter called Natural) a valid

request as defined in Section 3 hereof; (ii) executes an Interruptible

Balancing Service Agreement (IBS Agreement) with Natural applicable to

service under this Rate Schedule IBS; and (iii) meets the

qualifications set out in subsection (b) of this Section.

(b) To be eligible for service under this Rate Schedule IBS,

the Shipper must identify the service under its IBS Agreement as being

for one specified end-use facility for each IBS Agreement; except that

more than one facility may be specified to the extent limited

aggregation of end-use facilities and points is permitted under

Section 7(c) of this Rate Schedule IBS. Such end-use facilities need

not be directly connected to Natural's system, but the conditions

specified in Section 3.2(c) of this Rate Schedule IBS must be met. To

be eligible for service hereunder, the Shipper must have and maintain

in effect an FTS, FTS-G, or ITS Agreement to which the IBS Agreement

is linked, consistent with Section 3.2(a) of this Rate Schedule IBS.

The IBS Agreement must also specify a single Delivery Point for each

end-use facility; provided, however, that limited aggregation of end-

use facilities and points is permitted under Section 7(c) of this Rate

Schedule IBS. The Delivery Point may not be a Central Delivery Point,

except to the limited extent provided under Section 7(c) hereof, but

may be any other primary or secondary Delivery Point available under

the linked transportation Agreement; provided that the Delivery Point

must be consistent with the location of the end-use facility. An IBS

Agreement may only be linked to one transportation Agreement. A

transportation Agreement may have more than one IBS Agreement linked

to it, provided that the other requirements of this Rate Schedule IBS

are satisfied.

(c) The form of the IBS Agreement is contained in this Tariff.

There is no limitation on the number of IBS Agreements any one Shipper

may have.

2. APPLICABILITY, CHARACTER AND PRIORITY OF SERVICE

(a) This Rate Schedule IBS defines an interruptible imbalance

management service for specified end-use facilities. Service hereunder

shall be provided pursuant to Access Requests under Section 6 of this

Rate Schedule IBS. This Rate Schedule shall apply to all imbalance

management services provided by Natural for Shipper pursuant to an IBS

Agreement. This service will be provided based on line pack