Midwest Gas Storage, Inc.

First Revised Volume No. 1

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

Original Sheet No. 517 Original Sheet No. 517 : Effective

Gas by Turbine Meters", as such publication may be

revised from time to time (hereinafter referred to as

"AGA Report No. 71); or

in accordance with generally accepted industry

practices.

7.2 Auxiliary measuring equipment shall be installed,

maintained and operated in accordance with generally

accepted industry practices.

7.3 The volume of Gas delivered hereunder at each Point of

Receipt and Point of Delivery shall be calculated by means

of an electronic flow computer located at, or by the

processing of meter charts recorded at, each Point of

Receipt or each Point of Delivery, in either case in the

following manner:

(a) When the measuring equipment is an orifice meter, the

flow of Gas through the meter shall be computed in the

manner recommended in AGA Report No. 3, properly using

all factors set forth therein.

(b) When the measuring equipment is a turbine meter; the

volume of Gas delivered through the meter shall be

computed in the manner recommended in AGA Report No.

7, properly using all factors set forth therein.

displacement meter, the volume of Gas delivered

through the meter shall be computed by properly

applying, to the volume delivered at flowing gas

pressures and temperatures, correction factors for (1)

absolute static pressure, (2) flowing Gas temperature,

and (3) compressibility ratio.

7.4 The volume of Gas delivered or received hereunder shall be

computed using the standards and factors determined as

follows:

(a) The unit of volume for the purpose of measurement

shall be one thousand cubic feet of Gas at a

temperature of sixty degrees (60ø) Fahrenheit and a