Southwest Gas Storage Company

Original Volume No. 1

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Effective Date: 01/20/1991, Docket: CP90-1014-002, Status: Effective

Original Sheet No. 100 Original Sheet No. 100 : Superseded

RATE SCHEDULE ISS (Continued)

INTERRUPTIBLE STORAGE SERVICE

(2) Buyer shall give at least twenty-four (24)

hours notice prior to any proposed change of a

daily quantity of injection or withdrawal from

that set forth in the nomination provided for in

subparagraph (1). Daily changes in

nominations shall be made only as

necessitated by operating conditions not

reasonably foreseeable at the time such

schedules were tendered. Seller may waive

any part of the twenty-four (24) hours

notice, upon request, if operating

conditions permit such waiver. Buyer shall

immediately inform Seller of any other

changes in volumes tendered for injection or

withdrawal.

(3) At least ten (10) days prior to the first day

of January, April, July, and October, Buyer

shall furnish Seller a written schedule of the

estimated quantity of gas for injection,

withdrawal and storage gas balance for the

succeeding twelve month period beginning on

such date.

(4) The volumes nominated for storage by Buyer

shall be scheduled by Seller for injection,

withdrawal, and storage in the following

order: firm storage service, interruptible

storage service charged the applicable maximum

effective rate; and interruptible storage

service charged a rate less than the

applicable maximum rate in sequence starting

with the rate most proximate to the maximum