EXPLORER PIPELINE CO — Notice of Amendment

420075020M_noa and closure_07022007.pdf, page 1Official PDFU.S. Department of Transportation Pipeline and Hazardous Materials Safety Adminlstration 8701 South Gessner, Suite 11 10 Houston. TX 77074 NOTICE OF AMENDMENT CERTIFIED MAIL - RETURN RECEIPT REQUESTED July 2, 2007 Mr. Timothy C. Felt President and CEO Explorer Pipeline Company P.O. Box 2650 Tulsa, OK 74101 CPF NO. 4-2007-5020M Dear Mr. Felt: On April 23-27, 2007, representatives of the Pipeline and Hazardous Materials Safety Administration (PHMSA), pursuant to Chapter 601 of 49 United States Code inspected your procedures for operations and maintenance in Tulsa, OK. On the basis of the inspection, PHMSA has identified the apparent inadequacy found within Explorer Pipeline Company's procedures and are descried below: § 195.120 Passage of internal inspection devices. (a) Except as provided in paragraphs (b) and (c) of this section, each new pipeline and each line section of a pipeline where the line pipe, valve, fitting or other line component is replaced, must be designed and constructed to accommodate the passage of instrumented internal inspection devices. Explorer Pipeline Company's procedures did not clearly state that each new pipeline and each line section of a pipeline where the line pipe, valve, fitting or other line component is replaced, must be designed and constructed to accommodate the passage of instrumented internal inspection devices except as provided in paragraphs (b) and (c) of this section. Explorer Pipeline Company submitted its amended procedures to this office on June 1, 2007, prior to the delivery of this Notice to them. My staff reviewed the amended procedures, and it appears that the inadequacy outlined in this Notice of Amendment has been corrected. This letter is to inform you no further action is necessary and this case is now closed. Thank you for your cooperation.#

420075020M_noa and closure_07022007.pdf, page 2Response to this Notice This Notice is provided pursuant to 49 U.S.C. § 60108(a) and 49 C.F.R. § 190.237. Enclosed as part of this Notice is a document entitled Response Options for Pipeline Operators in Compliance Proceedings. Please refer to this document and note the response options. Be advised that all material you submit in response to this enforcement action is subject to being - made publicly available. If you believe that any portion of your responsive material qualifies for confidential treatment under 5 U.S.C. 552(b), along with the complete original document you must provide a second copy of the document with the portions you believe qualify for confidential treatment redacted and an explanation of why you believe the redacted information qualifies for confidential treatment under 5 U.S.C. 552(b). If you do not respond within 30 days of receipt of this Notice, this constitutes a waiver of your right to contest the allegations in this Notice and authorizes the Associate Administrator for Pipeline Safety to find facts as alleged in this Notice without further notice to you and to issue a Final Order. If, after opportunity for a hearing, your plans or procedures are found inadequate as alleged in this Notice, you may be ordered to amend your plans or procedures to correct the inadequacies (49 C.F.R. § 190.237). If you are not contesting this Notice, we propose that you submit your amended procedures to my office within [number of days] days of receipt of this Notice. This period may be extended by written request for good cause. Once the inadequacies identified herein have been addressed in your amended procedures, this enforcement action will be closed. In correspondence concerning this matter, please refer to CPF No 4-2007-5020M and, for each document you submit, please provide a copy in electronic format whenever possible. Sincerely, R.M. Seeley Director, Southwest Region Pipeline and Hazardous Material Safety Administration Enclosure: Response Options for Pipeline Operators in Compliance#