# MARATHON OIL COMPANY — Warning Letter

- **operation:** document
- **citation:** CPF 520070013W
- **title:** MARATHON OIL COMPANY — Warning Letter
- **source type:** enforcement
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2007-04-09
- **effective on:** Not available
- **summary:** CLOSED warning letter citing 192.749(a).
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-enforcement-520070013w.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-enforcement-520070013w.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-enforcement-520070013w
- **source url:** https://primis.phmsa.dot.gov/enforcement-data/case/520070013W
**body:**

Warning Letter involving MARATHON OIL COMPANY. PHMSA's enforcement data identifies the cited regulation as 192.749(a). The case was opened on 2007-04-09 and is reported as closed as of 2007-04-09. Open the official case record for notices, responses, orders, and the latest status.

Official case documents:

520070013W_warning letter_04092007.pdf: https://primis.phmsa.dot.gov/enforcement-documents/520070013W/520070013W_warning%20letter_04092007.pdf

520070013W_warning letter_04092007.pdf

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'12300 W. Dakota Ave., Suite 110
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WARNINGLETTER
Apri|9,2007
Mr. Schoffmann
Marathon Oil Company
3201 C Street, Suite 800
Anchorage, Alaska 99503
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cPF 5-2007-0013w
Dear Mr. Schoffmann,
on June 26,2006, through June 29,2006, a representative of the Pipeline and Hazardous
Materials Safety Administration (PHMSA) pwsuant to Chapter 601 of 49 United States Code
inspected your natural gas pipelines in Kenai, Alaska.
As a fesult of the inspection, it appears that you have committed probable violations ofthe
Pipeline Safety Regulations, Title 49, code of Federal Regulations. The items inspected and
the probable violation(s) is:
l, 192,749 Vault maintenance'
(a) Each vault housing pressure regulating and pressure limiting equipment, and having
a volumetric internal content of 200 cubic feet (5.66 cubic meters) or more, must be
inspected at intervals not exceeding 15 months, but at least once each calendar year, to
determine that it is in good physical condition and adequately ventilated'
(b) If gas is found in the vault, the equipment in the vault must be inspected for leaks'
and any leaks found must be repaired.
(c) The ventilating equipment must also be inspected to determine that it is functioning
properly.
iO) nacn vault cover must be inspected to assure that it does not present a hazard to
public safety.



valve vault inspection records could not be produced for the Kenai Gas Field to Nikiski
Natural Gas Transmission Line for the 2005 inspection period. Our inspector did note that
the valve maintenance records for the valves contained within the vaults were inspected
and found satisfactory. Also, during the PHMSA freld inspection, nine vaults were
inspected and found to be in satisfactory condition.
Under 49 United States Code, $ 60122, you are subject to a civil penalty not to exceed
$ 100,000 for each violation for each day the violation persists up to a maximum of $1,000,000
for any related series ofviolations. We have reviewed the circumstances and supporting
documents involved in this case, and have decided not to conduct additional enforcement
action or penalty assessment proceedings at this time. We advise you to correct the item(s)
identified in this letter. Failure to do so will result in Marathon Oil Company being subject to
additional enforcement action. No reply to this letter is required. If you choose to reply, in
your correspondence please refer to CPF 5-2007-0013W. 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 ofyour 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 qualifu for confidential treatment redacted
and an explanation ofwhy you believe the redacted information qualifies for confidential
treatment under 5 U.S.C. 552(b).
Director, Westem Region
Pipeline and Hazardous Materials Safety Administration
cc: PHP-60 Compliance Registry
PHP-500 B. Flanders (#1166'76)
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