Section 285.6300  Schedule F-8: Gas Stored Underground – Gas Utilities

a)         Provide information, when applicable, for the portion of each underground gas storage facility owned, contracted, leased, etc., during the test year and for the period directly after the test year to the present. When the underground storage is provided by a natural gas pipeline or other service provider, including services provided pursuant to a purchased storage service on file with the Federal Energy Regulatory Commission, the utility shall note this on the schedule and provide the information that is available.  References to storage facility shall be construed to include storage services that are not defined by a specific storage facility.

b)         Information to be provided shall include:

1)         Location and operator of the storage facility;

2)         Date that each contract, lease, etc., expires;

3)         Maximum working gas inventory volume for the portion of the storage facility owned, contracted, leased, etc., by the utility;

4)         Method of inventory valuation used by the utility (i.e., average, FIFO (first in, first out), LIFO (last in, first out));

5)         Maximum daily deliverability on a typical peak day for the portion of the storage facility owned, contracted, leased, etc., by the utility;

6)         Expected daily deliverability on a typical peak day for the portion of the storage facility owned, contracted, leased, etc., by the utility (differs from subsection (b)(5) only if derations are expected);

7)         Injection limitations, such as time of year constraints, source of injection gas, etc., for the portion of the storage facility owned, contracted, leased, etc., by the utility; and

8)         Method of dispatch (i.e., peak shaving, base loading, etc.).

c)         Supporting work papers shall include the following information for the portion of the storage facility owned, contracted, leased, etc., by the utility:

1)         An explanation of the calculation of each storage facility's maximum daily deliverability on a typical peak day;

2)         An explanation of the calculation of each storage facility's expected daily deliverability on a typical peak day;

3)         An explanation of the type of transportation used in conjunction with each leased or contracted storage agreement; and

4)         An explanation of how the utility accounts for its storage inventory levels (one central pool or specific information for each storage field).

(Source:  Amended at 38 Ill. Reg. 7598, effective March 20, 2014)