Guardian Pipeline, L.L.C.

Original Volume No. 1

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Effective Date: 12/01/2002, Docket: RP02-534-000, Status: Effective

Original Sheet No. 122 Original Sheet No. 122 : Superseded

GENERAL TERMS AND CONDITIONS

(Continued)

5. MEASUREMENT & MEASUREMENT EQUIPMENT (Continued)

(c) If no tests have been performed to determine the

degree of inaccuracy, or measurement equipment

is out of service, the quantity of Natural Gas

shall be estimated as follows:

(1) by using the registration of any existing

and agreed upon check equipment considered

by Transporter or Connecting Party to be

registering accurately, or in the absence

of such equipment,

(2) by correcting the error, if the quantity

of percentage of error is ascertainable by

calibration, test, or mathematical

calculation, or if neither of the two

foregoing procedures are applicable,

(3) by relating the quantity of receipt or

delivery to receipts or deliveries during

periods under similar conditions when the

measurement equipment was deemed to have

been registering accurately.

5.8 Electronic Natural Gas Measurement ("EGM") Technical

Requirements

(a) Accuracy. Where EGM is used, the system shall

use instruments designed to provide overall

measurement accuracy of ñ1.0% of flow, taking

into account all the sources of error, including

calibrated span of instruments, linearity,

hysteresis, repeatability, ambient temperature,

stability, vibration, and power supply

fluctuation.