Portland Natural Gas Transmission System

Second Revised Volume No. 1

Effective Date: 08/01/2010, Docket: RP10-885-000, Status: Effective

Second Revised Sheet No. 203 Second Revised Sheet No. 203

Superseding: Original Sheet No. 203

3.4 Measurement Variance. Reservation and usage charges shall be

based on Shipper's applicable monthly Maximum Contract Demand and Delivery

Point Scheduled Quantities, respectively, irrespective of whether the

applicable monthly Measurement Variance Factor is positive or negative.

Shipper shall receive in-kind adjustments to Scheduled Quantities in order to

account for positive and negative Measurement Variance Quantities. Transporter

shall publish the applicable monthly Measurement Variance Factor on its

Interactive Internet Website. Such published Measurement Variance Factor will

be bound by maximum and minimum percentages set forth on currently effective

Sheet No. 100 of this tariff.