Questar Overthrust Pipeline Company

Second Revised Volume No. 1-A

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Effective Date: 04/25/2007, Docket: RP07-360-000, Status: Effective

Original Sheet No. 99 Original Sheet No. 99 : Effective

GENERAL TERMS AND CONDITIONS

releasing Shipper's RDC. A conditional credit for the payment of either

volumetric or reservation-charge capacity releases will be applied to the

releasing Shipper's bill if, when required, the releasing Shipper has

provided the billing information set out in § 17.3. The releasing Shipper

will also be billed any negotiated marketing fee.

(b) Overthrust will bill the replacement Shipper based on the

rates specified in the service agreement and any other applicable charges.

The replacement Shipper must pay the billed amount directly to Overthrust.

(c) If a replacement Shipper fails to pay Overthrust, Overthrust

will notify the releasing Shipper that the conditional credit has been

reversed and of the amount due, including interest calculated in accordance

with 18 C.F.R. § 154.501(d). This amount must be paid by the releasing

Shipper. If the replacement Shipper subsequently pays Overthrust, Overthrust

will credit the amount received to the releasing Shipper.

17.12 Crediting of Interruptible Transportation Service Revenues. If,

during each 12-month period ending December 31, the total of all firm and

interruptible revenue exceeds $4,689,819, Overthrust will credit its firm and

eligible interruptible Shippers with 50 percent of interruptible revenues

that cause Overthrust's revenues to exceed the $4,689,819 threshold, net of

variable costs. Overthrust's interruptible Shippers will be eligible to

share in the annual crediting of interruptible transportation service

revenues if their effective transportation rate is greater than the annual

interruptible threshold rate. The annual interruptible threshold rate will

equal:

$0.0712 - Total annual interruptible revenues

180,600 Dth * 365 days

The $0.0712 and 180,600 Dth represent Overthrust's interruptible

transportation rate and the firm contract demand, established to be effective

April 1, 2001, by settlement in Docket No. RP00-2. Interruptible Shippers

will receive credits equal to the actual volume transported for the 12 months

multiplied by the excess in the average annual transportation rate paid above

the threshold rate. The amount credited to interruptible Shippers will be

deducted from the total interruptible transportation revenue for the month

and the remaining interruptible transportation revenues.