Portland General Electric Company

Original Volume No. 1

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Effective Date: 12/03/2003, Docket: RP04- 48-000, Status: Effective

Original Sheet No. 37 Original Sheet No. 37 : Effective

GENERAL TERMS AND CONDITIONS

(Continued)

4. MEASUREMENT OF GAS (Continued)

(c) by estimating the quantity of deliveries by comparison with

deliveries during preceding periods under similar conditions when

the meter was registering accurately.

4.9 Correction of Volume Calculation Error. If, upon inspection and

verification, any volume calculation error shall result in a daily

volume inaccuracy exceeding two (2) percent, then the inaccuracy shall

be corrected to zero error following verification by Transporter and

Shipper, however, in no event shall inaccuracies less than two (2)

percent daily or 100 Dth monthly be corrected.

4.10 Prior Period Adjustments. For treatment of measurement prior period

adjustments, treat the adjustment by taking it back to the production

month. A meter adjustment becomes a prior period adjustment after the

fifth business day following the business month. (NAESB 2.3.11)

4.11 Records Preservation. Each party shall preserve all test and

measurement data, charts or similar records for a period of at least

one (1) year or such other periods as shall be required under Part 225

of the Commission's regulations or the lawful requirements of any other

governmental body, Federal or State, prescribing longer retention

periods for any category of record.