Centerpoint Energy - Mississippi River

Third Revised Volume No. 1

Effective Date: 08/03/2005, Docket: RP05-172-000, Status: Effective

First Revised Sheet No. 87 First Revised Sheet No. 87 : Effective

Superseding: Original Sheet No. 87

GENERAL TERMS AND CONDITIONS

(Continued)

4. QUALITY

4.1 General. Customer agrees that the Gas tendered for transport

hereunder shall meet the specifications set forth in this section. MRT may

reject Gas tendered or delivered by Customer that fails to conform to the

quality specifications provided in this Tariff or which, in its reasonable

judgment, may cause harm to its facilities or diminish the quality of Gas in

its system. MRT may under all circumstances subject, or permit the subjection

of, the Gas to compression, cooling, cleaning, products extraction and other

processes.

4.2 Specifications. Unless otherwise specified in the Service

Agreement or Operational Balancing Agreement, or unless MRT waives the

specification detailed herein if such waiver will not impair the integrity of

MRT's system, the gas received or delivered under the terms of the Service

Agreement or Operational Balancing Agreement shall conform to the following

specifications:

(a) Solids. The gas shall be commercially free from solid

matter, dust and gum forming constituents which might cause injury to

or interference with proper operation of the lines, storage wells,

meters, regulators or other appliances through which it flows.

(b) Oxygen. The gas shall not at any time have an uncombined

oxygen content in excess of .05% by volume, and the parties shall make

every reasonable effort to keep the gas free from oxygen.

dioxide content in excess of two percent (2%) by volume.

(d) Nitrogen. The gas shall not at any time have a nitrogen

content in excess of two and one-half percent (2.5%) by volume.

(e) Hydrogen. The gas shall contain no carbon monoxide,

halogens, or unsaturated hydrocarbons, and no more than four hundred

parts per million (400 ppm) of hydrogen.

(f) Liquids. The gas shall be free of water and hydrocarbons in

liquid form at the temperature and pressure at which the gas is

delivered.

(g) Water Vapor Content. The gas shall in no event contain

water vapor in excess of seven (7) pounds per one million (1,000,000)

cubic feet, measured at a pressure base of 14.73 psia and at a

temperature of sixty degrees Fahrenheit.