Columbia Gas Transmission, LLC
FERC Gas Tariff
Third Revised Volume No. 1

Third Revised Sheet No. 37
Superseding
Second Revised Sheet No. 37

                                             RETAINAGE PERCENTAGES



                          Transportation Retainage                           2.062%


                          Gathering Retainage                                0.628%


                          Storage Gas Loss Retainage                         0.150%


                          Columbia Processing Retainage/1                        0%

 1/  The Columbia Processing Retainage shall be assessed separately from the processing retainage applicable to 
 third party processing plants set forth in Section 25.3 (f) of the General Terms and Conditions.

Issued by: James R. Downs, VP Rates & Regulatory Affairs
Issued on: March 1, 2010                      Effective on: April 1, 2010