Northern Natural Gas Company

Fifth Revised Volume No. 1

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Effective Date: 07/10/2009, Docket: RP09-760-000, Status: Effective

Second Revised Sheet No. 80B Second Revised Sheet No. 80B

Superseding: First Revised Sheet No. 80B

NON-CONFORMING SERVICE AGREEMENTS

Agreement/

Rate Amendment Date

Name of Shipper/Agreement No. Schedule Date Filed

----------------------------- -------- --------- --------

Southwestern Public Service Co. TFX 06/01/08 03/07/08

Contract 116267

Chevron U.S.A. Inc. PDD 04/01/09 10/17/08

Contract 110598/801525

Chevron U.S.A. Inc. PDD 04/01/09 11/12/08

Contract 110598/801528

Chevron U.S.A. Inc. PDD 10/01/09 11/12/08

Contract 110598/801536

Chevron U.S.A. Inc. PDD 09/01/09 11/12/08

Contract 110598/801537

BP Canada Energy Marketing Corp. PDD 12/01/09 01/15/09

Contract 110621/801571

Chevron U.S.A. Inc. PDD 07/01/09 02/05/09

Contract 110598/801594

Northern States Power Company-Wisconsin TF 11/01/09 06/09/09

Contract 23269/Amd 100