Caprock Pipeline Company

First Revised Volume No. 1

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Effective Date: 01/01/1993, Docket: RS92- 58-001, Status: Effective

Original Sheet No. 11 Original Sheet No. 11 : Effective

4.4 Positive Displacement Meters - Positive Displacement

Meters installed in such measuring stations shall be constructed and

operated in accordance with the provisions of AGA Measurement

Committee Report No. 6 (AGA Report No. 6) dated January 1971, and

any subsequent amendment or revisions thereof.

4.5 Turbine Meters - Turbine Meters installed in such

measuring stations shall be constructed and operated in accordance

with the provisions of AGA Measurement Committee Report No. 7 (AGA

Report No. 7), First Revision, dated November 1984, and any

subsequent modifications and amendments thereof.

4.6 Electronics - When and where electronic equipment and

flow computers are used, the gas may have its volume, mass and/or

energy content determined and computed in accordance with the

applicable AGA Standards including, but not limited to, AGA Report

No(s). 3, 5, 6, and 7 and any subsequent modifications and

amendments thereof. The parties agree to accept the use of

electronic devices and calculations in lieu of mechanical devices

and chart integration.

4.7 Notice - Caprock shall give reasonable notice to Shipper

in order that Shipper may have representatives present to observe

any installing, reading, cleaning, changing, repairing, inspecting,

testing, calibrating, or adjusting of Caprock's measuring equipment

used in measuring or checking the measurement of receipts or

deliveries of gas under the Agreement. The official charts

(recordings) from such measuring equipment shall remain the property

of Caprock, but upon request, Caprock will submit its records and

charts, together with calculations therefrom, to Shipper for

inspection and verification, subject to return to Caprock within

thirty (30) days after receipt thereof.

4.8 Testing and Calibration

(A) Caprock shall verify the accuracy, adjust and

calibrate all recording devices used in the measurement of the

receipt of gas on at least a quarterly basis. Caprock shall

not be required to, but may elect to, adjust or calibrate such

equipment more frequently than specified above, unless Shipper

desires a special test be performed as described in Section

4.9 below.

(B) If, during any test of the measuring equipment, an

adjustment or calibration error is found which results in an

incremental adjustment to the calculated hourly flow rate

through each meter run in excess of two percent (2%) of the

correct flow rate (whether positive or negative and using the

correct flow rate as the percent error equation denominator),

then any previous recording of such equipment shall be

corrected to zero (0) error for any period which the error

existed (and which is either known definitely or agreed to by

both parties) and the total flow for the period redetermined

in accordance with the provisions of Section 4.10 below. If

the period of error cannot be determined or agreed upon

between the