Centerpoint Energy Gas Transmission Company

Sixth Revised Volume No. 1

Effective Date: 05/01/2010, Docket: RP10-567-000, Status: Effective

Twentieth Revised Sheet No. 18 Twentieth Revised Sheet No. 18

Superseding: Nineteenth Revised Sheet No. 18

STATEMENT OF EFFECTIVE RATES AND CHARGES TRANSPORTATION OF GAS EFFECTIVE MAY 1, 2010

($/Dth)

Adjustments

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

BASE Sec. Sec. Sec. Sec. MAXIMUM MINIMUM FUEL LUFG

RATE SCHEDULE RATE 5.7 23 23.2 28.4 RATE RATE USE % %

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

NNTS - NO NOTICE TRANSPORTATION

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

RESERVATION FEE $8.7560 (0.0000) (0.0383)0.0000 ---- $8.7177 $0.0000

COMMODITY 0.0184 ---- ---- ---- 0.0004 0.0188 0.0188 4.15% 1.63%

OVERRUN $0.3063 (0.0000) (0.0013)0.0000 0.0004 $0.3054 $0.0188

NNTS - SMALL CUSTOMER

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

COMMODITY $0.3972 (0.0000) (0.0013)0.0000 0.0004 $0.3963 $0.0188 4.15% 1.63%

OVERRUN $0.3972 (0.0000) (0.0013)0.0000 0.0004 $0.3963 $0.0188

FSS - FIRM STORAGE SERVICE

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

DELIVERABILITY FEE $0.9606 ---- ---- ---- ---- $0.9606 $0.0000

CAPACITY FEE 0.0229 ---- ---- ---- ---- 0.0229 0.0000

STORAGE FEE 0.0154 ---- ---- ---- ---- 0.0154 0.0154 1.45% 0.50%

OVERRUN 0.5468 ---- ---- ---- ---- 0.5468 0.0154

DELIVERABILITY FEE ADJ 0.2562 ---- ---- ---- ---- 0.2562 0.0000

ISS - INTERRUPTIBLE STORAGE SERVICE

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

INTERRUPTIBLE STORAGE RATE $0.5468 ---- ---- ---- ---- $0.5468 $0.0154 1.45% 0.50%

OVERRUN 0.5468 ---- ---- ---- ---- 0.5468 0.0154

CAPACITY RELEASE VOLUMETRIC RATE:

The maximum volumetric bid rate for capacity release is the maximum applicable overrun rate for Rate

Schedules NNTS and FSS respectively.

FUEL RATES:

Transporter shall retain Fuel Use and LUFG equal to the product of the sum of the applicable Fuel Use and LUFG

percentages multiplied by the quantity received by Transporter. The Fuel Use and LUFG rates stated above are

calculated pursuant to Section 27 of the General Terms and Conditions.