Williams Natural Gas Company

Second Revised Volume No. 1

Effective Date: 10/01/1993, Docket: RS92- 12-003, Status: Effective

Original Sheet No. 269 Original Sheet No. 269 : Superseded

GENERAL TERMS AND CONDITIONS

17. MEASUREMENT AND MEASURING EQUIPMENT (Cont'd)

(a) The unit of measurement of gas received and delivered hereunder

shall be one (1) dekatherm (Dth).

(b) Orifice meters shall be constructed in accordance with the

recommendations prescribed in the latest edition of the ANSI/API

2530 measurement standard and any subsequent amendments or

replacements, thereto. Where other types of meters are used,

calculations shall be performed per normally accepted industry

practices, methods or standards.

is as follows:

Atmospheric Pressure

Area (PSIA)

--------------------------- --------------------

Oklahoma & Texas Panhandles 13.2

Kansas Hugoton 13.2

Colorado 12.8

Wyoming 11.5

All Other Areas 14.4

(d) The temperature of the gas shall be determined by means of

continuously recording thermometers unless it is mutually agreed

to use a 60 degree Fahrenheit flowing temperature. The average

flowing temperatures, recorded to the nearest one degree

Fahrenheit during each day, shall be deemed the daily gas

temperature and shall be used in computing the daily gas received

or delivered hereunder.

(e) Relative density (specific gravity) determinations for the

purpose of measurement computations shall be made upon initiation

of deliveries hereunder, and as often thereafter as found

necessary in practice, in accordance with an approved method, and

these determinations so made shall be used in calculating the

volume of gas delivered hereunder.