Pinnacle Pipeline Company

ORIGINAL VOLUME NO. 1

Effective Date: 10/08/2003, Docket: RP04-102-001, Status: Effective

Original Sheet No. 110 Original Sheet No. 110 : Effective

adjustment, and representatives of the other

party may be present for such events.

3.4 Measurement at the Receipt Point - At the Receipt

Point, Transporter will comply with the

provisions for gas measurement set forth in the

General Terms and Conditions of Northern

Natural's Tariff. Transporter's measurement

equipment, which is operated by Northern Natural,

will be used as the primary billing meters at the

Receipt Point.

3.5 Measurement at the Delivery Points - Each item of

equipment shall be calibrated to provide an

accuracy of plus or minus five-tenths of one

percent of full scale.

3.6 Resolving Differences at the Delivery Point(s) -

If the testing and calibration performed at the

Delivery Point(s) pursuant to Section 3.3 show

that any item of equipment installed by

Transporter does not conform to the accuracy

requirements of Section 3.5, all previous

readings of that item of equipment shall be

corrected to zero error for any period which the

equipment was known to be in error. If this

period is not known, the correction shall be made

for a period extending back one-half of the time

elapsed since the last testing and calibration

performed pursuant to Section 3.3. During any

period when any item of equipment installed at

the Delivery Point(s) by Transporter is

inoperable or known to be in error, the

measurements provided by the corresponding item

of equipment installed by Shipper, if any, shall

be used if determined to be accurate in

accordance with Section 3.5. If neither item of

equipment is operable or accurate, or available

in the case of Shipper's equipment, the

specification to be measured shall be determined

by the parties hereto on the basis of the best

data available using the first of the following

methods which is feasible:

(a) By correcting the error if the percentage

of error is ascertainable by calibration,

test, or mathematical calculations; or