Midwest Gas Storage, Inc.

First Revised Volume No. 1

Effective Date: 05/15/1994, Docket: CP90-454-004, Status: Effective

Original Sheet No. 518 Original Sheet No. 518 : Effective

pressure of 14.73 pounds per square inch absolute.

For the purposes of pricing hereunder, the dekatherm

equivalent of such unit of volume shall be determined

by multiplying each such unit of volume by the total

heating value per cubic foot of the Gas delivered

hereunder (adjusted to a common temperature and

pressure base) and by dividing the result by one

thousand (1,000).

(b) The average absolute atmospheric (barometric) pressure

at the Point of Delivery/Receipt shall be assumed to

be equal to 14.4 pounds per square inch.

by means of an instrument of standard manufacture

accepted in the industry for this purpose.

(d) The supercompressibility factor used in computing the

volume of Gas delivered through an orifice meter shall

be determined in a manner which yields results

consistent with the results produced by the procedures

presented in the American Gas Association Transmission

Measurement Committee Report No. 8 entitled

"Compressibility and Supercompressibility for Natural

Gas and Other Hydrocarbon Gases."

(e) The specific gravity of the Gas used in computing the

volume of Gas delivered through a meter shall be

determined by one of the following methods:

(i) At intervals of not more than six (6) Months, by

means of an instrument of standard manufacture

accepted in the industry for this purpose using

a sample of Gas from the Gas stream at the Point

of Receipt or Point of Delivery.

(ii) By means of an instrument of standard

manufacture accepted in the industry for this

purpose installed at a point to measure the

specific gravity of the Gas stream from which

Gas is being delivered at the Point of Receipt

or Point of Delivery.