Northern Border Pipeline Company

First Revised Volume No. 1

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Effective Date: 03/22/2010, Docket: RP10-385-000, Status: Effective

Second Revised Sheet No. 233A Second Revised Sheet No. 233A

Superseding: First Revised Sheet No. 233A

GENERAL TERMS AND CONDITIONS

5. QUALITY OF GAS (Continued)

5.5 Posting of Gas Quality Data

5.51 Required Posting

Company shall provide on its Informational Postings

web site daily average gas quality information for

prior Gas Day(s), to the extent available, for

location(s) that are representative of mainline gas

flow.

The following are examples of gas quality attributes

that could be included in the posting for the

applicable Gas Day(s) and location(s):

- Heating Value

- Hydrocarbon Components (% of C1 - Cnn)

- Specific Gravity

- Water

- Nitrogen

- Carbon Dioxide

- Oxygen

- Hydrogen

- Helium

- Total Sulfur

- Hydrogen Sulfide

- Carbonyl Sulfide

- Mercaptans

- Mercury and/or other contaminants being measured

In any event, compliance with gas quality

requirements is in accordance with Subsection 5.1 of

the General Terms and Conditions of Company's FERC

Gas Tariff. [4.3.90]

Data provided pursuant to NAESB WGQ Standard 4.3.90

shall be made available on Company's Informational

Postings web site for the most recent three-month

period. Beyond the initial three-month period, the

historical data shall be made available offline in

accordance with regulatory requirements. [4.3.91]