Williams Natural Gas Company

Second Revised Volume No. 1

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Effective Date: 04/01/1997, Docket: RP96-387-000, Status: Effective

First Revised Sheet No. 112 First Revised Sheet No. 112 : Superseded

Superseding: Substitute Original Sheet No. 112

STS RATE SCHEDULE

Small Customer Trans-Storage Service

STS-P Production Area

STS-M Market Area

2. APPLICABILITY AND CHARACTER OF SERVICE (Cont'd)

(d) Any Shipper under this rate schedule shall specify a MDTQ by area

in the executed STS Service Agreement. When Shipper requires

deliveries at its MDTQ, or during system-wide periods of daily

balancing as defined in Article 9.3, at least one-third of but no

more than one-half of the total deliveries of gas shall be from

flowing supply sources and at least one-half of but no more than

two-thirds of the total deliveries of gas shall be from storage.

Shippers under Rate Schedule STS-M shall have transportation

quantity rights in the market area equal to the MDTQ of the service

agreement, firm storage withdrawal rights equal to at least

one-half of but no more than two-thirds of the MDTQ of the service

agreement, and transportation quantity rights in the production

area (if applicable) equal to no more than one-half of the MDTQ of

the service agreement (plus all fuel and loss in the market area).

Shippers under Rate Schedule STS-P shall have transportation

quantity rights in the production area equal to the MDTQ under the

service agreement and firm storage withdrawal rights equal to at

least one-half of but no more than two-thirds of the MDTQ under the

service agreement.

3. RATE

(a) Shipper shall agree to pay for all service rendered under the

executed STS Service Agreement in accordance with this Rate

Schedule STS, or any superseding rate schedule(s) applicable to

such service, as filed with the Federal Energy Regulatory

Commission or its successor, and as may be lawfully revised from

time to time. The initial rates and all subsequent revisions to

such rates shall be provided in writing to Shipper by WNG.