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Original Sheet No. 56 Original Sheet No. 56 : Superseded

RATE SCHEDULE FSS (Continued)

FIRM STORAGE SERVICE

(d) Seller shall have the unqualified right to

commingle gas stored hereunder with gas from other

sources, and to treat and handle all such gas as

its own. It is recognized that gas redelivered

will not be the same molecules as those received

at the Point of Receipt.

(e) Buyer may witness Seller's installation or

maintenance of measuring equipment. Seller shall

not be required to verify accuracy more often than

once during any thirty (30) day period. If, upon

test, accuracy is found to be within 2% by volume

(chromatograph/calorimeter within 0.5%), such

equipment shall be assumed to be accurate. Any

error exceeding these percentages will require

correction to zero error of previous recordings

back to the date error began. If beginning date of

error is unknown, correction shall extend to one-

half the time since the last test, not to exceed

sixteen (16) days.

(f) Upon termination of storage service, Buyer will

balance any final imbalance within sixty (60) days

of the date that Seller notifies Buyer of any final

imbalance. If at the end of such final balancing

period, Seller owes Buyer gas which Buyer has not

received, Seller will retain those quantities free

and clear of any adverse claims.