Great Lakes Gas Transmission Limited Partner

Second Revised Volume No. 1

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Effective Date: 04/27/2001, Docket: RP01-272-000, Status: Effective

Fourth Revised Sheet No. 20 Fourth Revised Sheet No. 20 : Effective

Superseding: Third Revised Sheet No. 20

GENERAL TERMS AND CONDITIONS

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(continued)

preceding periods under similar conditions when the meter was registering accurately.

(d) These corrections, or any other measurement or data corrections should be processed within

6 months of the production month with a 3 month rebuttal period. This standard shall not

apply in the case of deliberate omission or misrepresentation or mutual mistake of fact.

Parties' other statutory or contractual rights shall not otherwise be diminished by this

standard.

7.6 If at any time during the term of service a new method or technique is developed with respect to

gas measurement or the determination of the factors used in gas measurement, the new method or

technique may be substituted upon mutual agreement by both parties.

7.7 The parties agree to preserve for a period of at least three (3) Years or such longer periods as

may be required by public authority, all test data, charts and other similar records.

8. QUALITY

8.1 Heating Value

Gas delivered by Shipper to Transporter at each point of receipt shall have a heating value not

greater than 1069 Btu's per cubic foot nor less than 967 Btu's. Transporter shall have the right

to waive such Btu content limits if, in Transporter's sole opinion, Transporter is able to

accept gas with a Btu content outside such limits without affecting Transporter's operations.

The heating value shall be determined at intervals of not more than thirty (30) Days by means of

an instrument(s) of standard manufacture accepted in the industry for this purpose or using a

sample of gas representative of the gas stream that is being delivered to Transporter or

received from Transporter at the point(s) of receipt or delivery.

In the event, however, that the heating value of Gas received by Transporter at any point drops

below 1013 Btu, which is the Btu level at which the MDQs of Service Agreements are currently

based and Transporter is unable to Transport a Shipper's Scheduled Daily Delivery due to the

drop in the Btu level, Transporter shall utilize the Curtailment provision of Section 11.4 of

the General Terms and Conditions, but only for those Shippers from whom Transporter receives Gas

at that point.

For the purpose of calculating receipts and deliveries, the heating value of the gas so

determined at each such point shall be deemed to remain constant at such point until the next

determination.

8.2 Freedom from Objectionable Odor and Matter

The gas received and delivered hereunder:

(a) shall be commercially free (at prevailing pressure and temperature) from objectionable

odors, dust, or other solid or liquid matter that might interfere with its merchantability

or cause injury to or interference with proper operation of the lines, regulators, meters

and other equipment of Transporter;

(b) shall not contain more than one quarter (1/4) grain of hydrogen sulfide per one hundred

(100) cubic feet of gas;

hydrogen sulfide and mercaptans) per one hundred (100) cubic feet of gas;

(d) shall not at any time have an oxygen content in excess of one percent (1%) by volume and

the parties shall make every reasonable effort to keep the gas free of oxygen;