Reliant Energy Gas Transmission Company

Fourth Revised Volume No. 1

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Effective Date: 05/02/1997, Docket: RP97- 57-000, Status: Effective

Second Revised Sheet No. 67 Second Revised Sheet No. 67 : Effective

Superseding: First Revised Sheet No. 67

RATE SCHEDULE IT

INTERRUPTIBLE TRANSPORTATION SERVICE

(continued)

5. MONTHLY BILL:

5.1 Calculation. The bill for a Service Month shall be

the product of the Commodity Rate and the total MMBtu

of Gas delivered during the Service Month, including

any Overrun Gas, whether authorized or unauthorized.

5.2 Adjustments.

(a) Excess Contract Quantities: Excess Contract

Quantities under Rate Schedule IT are those

quantities that (i) exceed, on any Day, one

hundred two percent (102%) of Shipper's Maximum

Contract Quantity (or in the event of

curtailment or when Transporter has invoked the

provisions of Section 20 of the General Terms

and Conditions, quantities that exceed 102% of

the total quantity which Shipper is authorized

to transport); and (ii) are unauthorized Overrun

Gas. Excess Contract Quantities under Rate

Schedule IT are categorized by percentage of

Shipper's scheduled quantities or other

authorized amount, as follows:

greater than 102% but less than or equal to

105%;

greater than 105% but less than or equal to

110%; and

greater than 110%.

If a Shipper's total unauthorized Overrun Gas

quantities under Rate Schedule IT are less than

both 50 MMBtu and 10% of its Maximum Contract

Quantity, Shipper shall not be assessed an

Excess Contract Quantities charge; provided,

however, that such exemption shall not be

applicable in the event of curtailment or if

Transporter has invoked the provisions of

Section 20 of the General Terms and Conditions.

A Shipper's bill for a Service Month in which

Excess Contract Quantities are transported shall

be adjusted by adding to it the sum of the

products of (x) the Excess Contract Quantities

within each of the above specified percentage

ranges, multiplied by (y) the applicable Excess

Contract Quantities Rate, as specified in

Transporter's Statement of