# MARKWEST OKLAHOMA GAS COMPANY, L.L.C. — Notice of Amendment

- **operation:** document
- **citation:** CPF 420111009M
- **title:** MARKWEST OKLAHOMA GAS COMPANY, L.L.C. — Notice of Amendment
- **source type:** enforcement
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** 2011-09-07
- **effective on:** Not available
- **summary:** CLOSED notice of amendment citing 192.16, 192.227(a), 192.243(d)(3), 192.477, 192.613(a), 192.736(a).
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-enforcement-420111009m.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-enforcement-420111009m.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-enforcement-420111009m
- **source url:** https://primis.phmsa.dot.gov/enforcement-data/case/420111009M
**body:**

Notice of Amendment involving MARKWEST OKLAHOMA GAS COMPANY, L.L.C.. PHMSA's enforcement data identifies the cited regulations as 192.16,  192.227(a),  192.243(d)(3),  192.477,  192.613(a),  192.736(a). The case was opened on 2011-09-07 and is reported as closed as of 2012-06-05. Open the official case record for notices, responses, orders, and the latest status.

Official case documents:

420111009M_ Closure_06052012_text.pdf: https://primis.phmsa.dot.gov/enforcement-documents/420111009M/420111009M_%20Closure_06052012_text.pdf

420111009M_Closure_06052012.pdf: https://primis.phmsa.dot.gov/enforcement-documents/420111009M/420111009M_Closure_06052012.pdf

420111009M_NOA_09072011.pdf: https://primis.phmsa.dot.gov/enforcement-documents/420111009M/420111009M_NOA_09072011.pdf

420111009M_NOA_09072011_text.pdf: https://primis.phmsa.dot.gov/enforcement-documents/420111009M/420111009M_NOA_09072011_text.pdf

420111009M_Operator Response to NOA_09292011.pdf: https://primis.phmsa.dot.gov/enforcement-documents/420111009M/420111009M_Operator%20Response%20to%20NOA_09292011.pdf

420111009M_ Closure_06052012_text.pdf

CERTIFIED MAIL - RETURN RECEIPT REQUESTED
June 5, 2012
Mr. John Mollenkopf
COO/Senior Vice President
Markwest Oklahoma Gas Company, LLC
1515 Arapahoe Street, Tower I, Suite 1600
Denver, CO 80202-2126
CPF 4-2011-1009M
Dear Mr. Mollenkopf:
Between April and June 2011, representatives of the Pipeline and Hazardous Materials
Safety Administration (PHMSA) inspected Markwest Oklahoma Gas Company, LLC
(Markwest) pipeline facilities and Operations and Maintenance Procedures. As a result of
the inspection, Markwest was issued a Notice of Amendment on September 7, 2011. This
Notice proposed amendment of your procedures to assure safe operation of your pipeline
facilities.
Markwest submitted its amended procedures from October 2011 through April 2012. My
staff reviewed the amended procedures, and it appears that the inadequacies outlined in
this Notice of Amendment have been corrected.
This letter is to inform you no further action is necessary and this case is now closed.
Thank you for your cooperation.
Sincerely,
R. M. Seeley
Director, Southwest Region
Pipeline and Hazardous
Materials Safety Administration

420111009M_Closure_06052012.pdf

u.s. Department
of Transportation
Pipeline and
Hazardous Materials Safety
Administration
8701 South Gessner, Suite 1110
Houston, TX 77074
CERTIFIED MAIL- RETURN RECEIPT REQUESTED
June 5, 2012
Mr. John Mollenkopf
COO/Senior Vice President
Markwest Oklahoma Gas Company, LLC
1515 Arapahoe Street, Tower I, Suite 1600
Denver, CO 80202-2126
CPF 4-2011-1009M
Dear Mr. Mollenkopf:
Between April and June 2011, representatives of the Pipeline and Hazardous Materials
Safety Administration (PHMSA) inspected Markwest Oklahoma Gas Company, LLC
(Markwest) pipeline facilities and Operations and Maintenance Procedures. As a result of
the inspection, Markwest was issued a Notice of Amendment on September 7, 2011 . This
Notice proposed amendment of your procedures to assure safe operation of your pipeline
facilities.
Markwest submitted its amended procedures from October 2011 through April 2012. My
staff reviewed the amended procedures, and it appears that the inadequacies outlined in
this Notice of Amendment have been corrected.
This letter is to inform you no further action is necessary and this case is now closed.
Thank you for your cooperation.
Sincerely,
R. M. Seeley
Director, Southwest Region
Pipeline and Hazardous
Materials Safety Administration
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