Southwest Gas Storage Company

Original Volume No. 1

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

Original Sheet No. 107 Original Sheet No. 107 : Superseded

RATE SCHEDULE ISS (Continued)

INTERRUPTIBLE STORAGE SERVICE

6.6 Statements and Payments

(a) Monthly Bill

Seller shall send to Buyer, on or before the tenth

(10th) day of each month, a billing of charges for

service rendered in the preceding month. Such charges

may be based on estimated quantities if actual

quantities are unavailable in time to prepare the

billing. In that event, Seller shall provide, in the

succeeding month's billing, an adjustment based on any

difference between actual quantities and estimated

quantities.

(b) Payment of Bill

Buyer shall pay Seller within ten (10) days from the date

on which the bill is sent for all charges billed in

accordance with the provisions of this Rate Schedule.

Should Buyer fail to pay part or all of the amount of

any such bill, interest thereon shall accrue at an

average prime interest rate computed in a manner

consistent with Section 154.67(c)(2)(iii)(A)(B) of the

Commission's Regulations, from the due date until date

of payment. If such failure to pay continues for

thirty (30) days after payment is due, then Seller, in

addition to any other remedy it may have, may suspend

further receipt and/or redelivery of gas until such

amount is paid after Seller provides Buyer with twenty

(20) days prior written notice.

In the event that an error is discovered in the amount

billed or paid hereunder, such error shall be adjusted

within thirty (30) days of the determination thereof,

provided that claim therefor shall have been made within

sixty (60) days from the date of discovery of such error,

but in any event within twelve (12) months from the date

of the applicable statement.