Transcontinental Gas Pipe Line Company, LLC

Fourth Revised Volume No. 1

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Effective Date: 04/01/2010, Docket: RP10-395-000, Status: Effective

Third Revised Sheet No. 79 Third Revised Sheet No. 79

Superseding: Second Revised Sheet No. 79

INTERRUPTIBLE TRANSPORTATION SERVICE RATES

APPLICABLE TO TRANSPORTATION RENDERED PURSUANT TO

RATE SCHEDULE IT AND PART 284 OF THE

REGULATIONS OF THE FERC

Rate per dt (excluding surcharge) 1/

-----------

Receipt & Fixed Variable Electric

Delivery Cost Cost Power Maximum Minimum

Zone Unit Rate Unit Rate Unit Rate Rate 2/ Rate 3/

----------------- --------- --------- --------- -------- --------

($) ($) ($) ($) ($)

1-1 0.07175 0.00142 0.00063 0.07380 0.00205

1-2,2-1 0.09787 0.00340 0.00148 0.10275 0.00488

1-3,3-1 0.14173 0.00566 0.00254 0.14993 0.00820

1-4,4-1 0.29973 0.01573 0.00685 0.32231 0.02258

1-4A,4A-1 0.33866 0.01807 0.00794 0.36467 0.02601

1-4B,4B-1 0.36253 0.01961 0.00866 0.39080 0.02827

1-5,5-1 0.41218 0.02329 0.01018 0.44565 0.03347

1-6,6-1 0.47860 0.02759 0.01218 0.51837 0.03977

2-2 0.07813 0.00214 0.00085 0.08112 0.00299

2-3,3-2 0.12199 0.00440 0.00191 0.12830 0.00631

2-4,4-2 0.27999 0.01447 0.00622 0.30068 0.02069

2-4A,4A-2 0.31892 0.01681 0.00731 0.34304 0.02412

2-4B,4B-2 0.34279 0.01835 0.00803 0.36917 0.02638

2-5,5-2 0.39244 0.02203 0.00955 0.42402 0.03158

2-6,6-2 0.45886 0.02633 0.01155 0.49674 0.03788

3-3 0.09587 0.00242 0.00106 0.09935 0.00348

3-3 (Washington Withdrawal) 0.05201 0.00016 0.00000 0.05217 0.00016

3-4,4-3 0.25387 0.01249 0.00537 0.27173 0.01786

3-4A,4A-3 0.29280 0.01483 0.00646 0.31409 0.02129

3-4B,4B-3 0.31667 0.01637 0.00718 0.34022 0.02355

3-5,5-3 0.36632 0.02005 0.00870 0.39507 0.02875

3-6,6-3 0.43274 0.02435 0.01070 0.46779 0.03505

4-4 0.21001 0.01023 0.00431 0.22455 0.01454

4-4A,4A-4 0.24894 0.01257 0.00540 0.26691 0.01797

4-4B,4B-4 0.27281 0.01411 0.00612 0.29304 0.02023

4-5,5-4 0.32246 0.01779 0.00764 0.34789 0.02543

4-6,6-4 0.38888 0.02209 0.00964 0.42061 0.03173

4A-4A 0.09094 0.00250 0.00109 0.09453 0.00359

4A-4B,4B-4A 0.11481 0.00404 0.00181 0.12066 0.00585

4A-5,5-4A 0.36139 0.02013 0.00873 0.39025 0.02886

4A-6,6-4A 0.42781 0.02443 0.01073 0.46297 0.03516

4B-4B 0.07588 0.00170 0.00072 0.07830 0.00242

4B-5,5-4B 0.38526 0.02167 0.00945 0.41638 0.03112

4B-6,6-4B 0.45168 0.02597 0.01145 0.48910 0.03742

5-5 0.16446 0.00772 0.00333 0.17551 0.01105

5-6,6-5 0.23088 0.01202 0.00533 0.24823 0.01735

6-6 0.11843 0.00446 0.00200 0.12489 0.00646