Centra Pipelines Minnesota Inc.

Second Revised Volume No. 2

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Effective Date: 10/16/1991, Docket: RP91-136-002, Status: Effective

Original Sheet No. 13 Original Sheet No. 13 : Effective

GENERAL TERMS AND CONDITIONS

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SECTION 1 - APPLICATION

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1.1 The following Terms and Conditions shall apply to all

services of Centra Pipelines Minnesota Inc. ("Centra").

SECTION 2 - DEFINITION OF TERMS

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2.1 The term "day" shall mean a period of twenty-four (24) consecutive

hours, beginning and ending at 12:00 noon Central Standard Time.

2.2 The term "month" shall mean the period beginning on the first day

of the calendar month and ending at 12:00 noon on the first day of

the next succeeding calendar month.

2.3 The term "cubic foot" shall mean the volume of gas which occupies

one cubic foot when such gas is at a temperature of 60 degrees

Fahrenheit, and at a pressure of 14.73 pounds per square inch

absolute.

2.4 The term "Mcf" shall mean 1,000 cubic feet.

2.5 The term "MMBtu" shall mean one million British Thermal Units

measured on a dry basis.