Questar Pipeline Company

First Revised Volume No. 1

Effective Date: 05/12/2003, Docket: RP03-342-000, Status: Effective

Fourth Revised Sheet No. 87 Fourth Revised Sheet No. 87 : Effective

Superseding: Third Revised Sheet No. 87

as outlined in GPA Standard 2145-03 and GPA Standard 2172-

96, with any subsequent amendments or revisions that Questar

may adopt.

(b) Installation, maintenance, and operation of on-

line chromatographs or laboratory chromatographs, including

sample delivery systems, and composite sample systems, will

conform with API Chapter 14.1, and GPA Standard 2261-00 with

any subsequent amendments or revisions.

gross heating value, specific gravity and components for all

gas will be determined during the applicable sampling period

at that site. Gross heating values, specific gravities and

components determined from each analysis will be used in

calculating gas on a continuous basis

(d) If a continuous gas sampling device

is used, gross heating value, specific gravity and

components for all gas will be determined not less than once

every month at that site. Gross heating values and specific

gravities determined from spot samples will be used in

calculating gas delivered for the day on which the test is

made and all following days until the next test is made.

14.7 Supercompressibility. The measurement of gas

will be corrected for deviation from Boyle's Law at the

pressures and temperatures under which gas is measured by

use of the calculation appearing in AGA Report No. 8 at each

of the points where the gas is received and delivered as

supplemented or amended. Inert content of the metered gas

stream used in the AGA Report No. 8, Gross I, Method I,

calculations will be determined by a chromatographic

analysis using spot sampling when deliveries begin and

thereafter by (i) an on-line chromatographic analysis, (ii)

chromatographic analysis not less than semiannually or (iii)

analysis obtained from a composite sample.