NC0046213_Permit Issuance_19960802

State of North Carolina IT
Department of Environment,
Health and Natural Resources 4�r
Division of Water Quality 1
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p E H N F4
A. Preston Howard, Jr., P.E., Director
August 2, 1996
Mr. David Siebold
Marathon Oil Company
539 S. Main Street
Findlay, Ohio 45840
Dear Mr. Siebold:
Subject: NPDES Permit Issuance
Permit No. NCO046213
Marathon Oil Company
Mecklenburg County
In accordance with the application for a discharge permit received February 12, 1996, the Division
is forwarding herewith the subject state - NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the US Environmental Protection Agency dated December 6, 1983.
This final permit has been prepared after a careful review of the comments received. A letter from
Mr. Patrick Mihelick, dated May 7, 1996, had comments pertaining to the requirements of an certified
operator and testing requirements for chlorophenolic compounds. Marathon is not required to employ a
certified wastewater treatment plant operator in responsible charge (ORC) as stipulated in Part II Section
C, nor is a certified operator required to release stormwater from the pond. The testing requirements for
chlorophenols has been addressed below.
In response to oil terminals' comments pertaining to the chlorophenol monitoring requirements in
the draft permits, the Division held a teleconference with representatives from the oil terminals and their
laboratories. The oil terminals' representatives had the following concerns: (1) Why was there a
requirement to monitor for eight individual chlorophenols in addition to those specified in EPA Method
625; and (2) What is the proper laboratory procedure to analyze for these eight chlorophenols?
After some additional data review, research, and discussion, two determinations were made.
First, although all chlorophenols have the potential to cause taste and odor problems in drinking water
supplies and tainting of fish tissue, the eight chlorophenols trot covered by EPA Method 625 are not
considered to be carcinogens. Second, certain chlorophenolic compounds are likely to form first. This is
significant because certain parameters can be used to "screen" the stormwater discharge for the presence of
chlorophenols. Specifically, the five chlorophenols included in EPA Method 625 can be used as
indicators of all chlorophenols because these five compounds would be the first to form when chlorine
reacts with phenol.
Therefore, EPA Method 625 will be used as an initial screen. If no chlorophenols are detected, no
additional monitoring will be required. However, if one or more chlorophenols are detected at
concentrations greater than 50 µg/1, then the oil terminal would be required to monitor for the eight
additional chlorophenols beginning with the next scheduled monitoring event and continue to monitor until
the permit expired. The additional chlorophenol monitoring would include identifying and quantifying all
chlorophenols present in the sample(s).
P.O. Box 29535, Raleigh, North Carolina 27626.0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 500% recycled/ 10% post -consumer paper

If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such demand is
made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part II, E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be required
by the Division of Environmental Management or permits required by the Division of Land Resources,
Coastal Area Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Mr. Steve Pellei at telephone
number [phone], extension 516.
Sincerely,
Original Signed By
A Preston Howard, Jr,
A. Preston Howard. Jr., P.E.
cc: Central Files
Mr. Roosevelt Childress, EPA
Mooresville Regional Office
(Rermits and Engineering Unit
Mecklenburg County Environmental Protection
Facilities Assessment Unit
Aquatic Survey and Toxicology Unit

Permit No. NCO046213
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Marathon Oil Company
is hereby authorized to discharge wastewater from a facility located at
8035 Mount Holly Road
Paw Creek
Mecklenburg County
to receiving waters designated as an Unnamed Tributary to Long Creek in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
H, III, and IV hereof.
The permit shall become effective September 1, 1996
This permit and the authorization to discharge shall expire at midnight on August 31, 2001
Signed this day August 2, 1996
Original Signed By
A. Preston Howard, Jr.
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0046213
SUPPLEMENT TO PERMIT COVER. SHEET
Marathon Oil Company
is hereby authorized to:
1. Continue to operate a spill containment area and final holding pond located at 8035 Mount
Holly Road, Paiv Creek, Mecklenburg County (See Part III of this Permit), and
2. Discharge stormwater from the diked storage area from said treatment works at the location
specified on the attached map into -an unnamed tributary to Long Creek which is classified
Class WS-IV waters in the Catawba River Basin.

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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NCO046213
During the period beginning on the effective date of the permit and lasting until expiration,
the Permittee is authorized to discharge
stormwater From outfall(s) serial number 001. Such discharges shall be limited and monitored by the Pen-nitt.ee as specified below:
Effluent Characteristics Discharge Limitations
Monitoring
Requirements
Measurement
Sample
Sample
Monthly Avg. Weekly Avg. Daily Max.
Free uency
Type
Location
Flowl
Monthly
1
Effluent
Total Suspended Solids 45.0 mg/l
Monthly
Grab
Eftluent
Oil and Grease2
Monthly
Grab
Effluent
Phenol
Monthly
Grab
Effluent
Benzene
Monthly
Grab
Effluent
Xylene
Semi-annually
Grab
Effluent
EPA Methods 624/6253
Semi-annually
Grab
Effluent
Acute Toxicity4
Annually
Grab
Effluent
Footnotes:
1 Where no measurable discharge occurs, "no discharge" should be clearly noted on the submitted monthly discharge monitoring report.
Flow may be monitored in one of four ways: a) Measure flow continuously, b) Calculate flow based on the area draining to the outfall, the built upon
area, and the total rainfall (this method of flow measurement should not be used at facilities that have large ponds to collect
surface water runoff), c) Estimate by flow measurement at 20 minute intervals during the entire discharge event, or d) Base flow on pump logs.
Where possible, the grab sample for oil and grease should be skimmed from the surface of a quiescent (calm water) zone.
3 EPA Method 625 includes five (5) chlorophenols. If one or more chlorophenols) is detected at concentrations greater than or equal to 50 µg/l, the
permittee will be required to analyze for the eight chlorophenols (listed below) in addition to EPA Method 625. This additional required monitoring
will begin with the permittee s next scheduled monitoring event, occur on a semi-annual basis, and will last for the duration of the pen -nit. Eight
chlorophenols include the following: 3-chlorophenol, 4-chlorophenol, 2,3-dichlorophenol, 2,5-dichlorophenol, 2,6-dichlorophenol, 3,4-
dichlorophenol, 2,3,4,6-tetrachlorophenol, and 3-methyl-6-chlorophenol.
4 Acute Toxicity (Fathead Minnow, 24-hour) Monitoring, Annual, See Part III, Condition E
There shall be no discharge of floating solids or visible foam in other than trace am unts.
There shall be no direct discharge of tank solids, tank bottom water, or the rag layer.
There shall be no direct discharge of tank contents following hydrostatic testing unless benzene concentration is less than 1.19 ug/1 and toluene
concentration is less than 11 ug/l.

Permit No. NC0046213
Part III
E. ACUTE TOXICITY MONITORING (ANNUAL)
The permittee shall conduct annual toxicity tests using protocols defined as definitive in E.P.A.
Document EPA/600/4-90/027 entitled "Methods for Measuring the Acute Toxicity of Effluents to
Freshwater and Marine Organisms." The monitoring shall be performed as a Fathead Minnow
(Pimephales promelas) 24 hour static test. Effluent samples for self -monitoring purposes must be
obtained below all waste treatment. The permittee will conduct one test annually, with the annual
period beginning in January of the calendar year of the effective date of the permit. The annual test
requirement must be performed and reported by June 30. If no discharge occurs by June 30,
notification will be made to the Division by this date. Toxicity testing will be performed on the next
discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this permit
condition will be entered on the Effluent Discharge Form (MR-1) for the month in which it was
performed, using the appropriate parameter code. Additionally, DWQ Form AT-1 (original) is to
be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of Water Quality
4401 Reedy Creek Rd.
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit
may be re -opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test.
Failure to submit suitable test results will constitute noncompliance with monitoring requirements.
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SOC PRIORITY PROJECT: Yes No x
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Jeanette Powell
Date: March 14, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Mecklenburg
Permit No. NC0046213
PART I - GENERAL INFORMATION
1. Facility and Address: Marathon Petroleum Company
8101 Mt. Holly Road
Paw Creek, North Carolina 28130
2. Date of Investigation: March 12, 1996
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer I
4. Persons Contacted and Telephone Number: Mr. Tommy Joiner,
Terminal & Transport Supervisor; Tel# [phone]
5. Directions to Site: Travel west from Charlotte on Highway 27
to the community of Thrift. Continue to travel west on
Highway 27 past the junction with State Road 1784 (Mt. Holly
Road) approximately 200 yards. Marathon Petroleum is on the
left side of Highway 27.
6. Discharge Point(s). List for all discharge points:
Latitude: 35016150" Longitude: 80056138H
Attach a U.S.G.S. map extract and indicate treatment facility
site and discharge point on map.
U.S.G.S. Quad No.: F 15 SW U.S.G.S. Name: Mountain Island
Lake, N.C.
7. Site size and expansion are consistent with application?
Yes x No If No, explain:
8. Topography (relationship to flood plain included): Gently
rolling with 3-6% slopes. The site is not located in a flood
plain area.

9.
10.
Location of nearest dwelling: None within 500 feet of the
treatment facility.
Receiving stream or affected surface waters: U.T. to Long
Creek.
a. Classification: WS-IV
b. River Basin and Subbasin No.: Catawba 03-08-34
C. Describe receiving stream features and pertinent
downstream uses: The receiving stream passes through a
mixed industrial and residential area prior to merging
with Long Creek. There are seven known discharges to
Long Creek or an unnamed tributary to Long Creek. Of the
seven, five are oil storage terminal facilities.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: Flow is
intermittent depending on rainfall and runoff. The types
of fuels stored are regular unleaded gasoline, super
unleaded gasoline, K-1 kerosene and Low sulfur No. 2 fuel
oil.
b. What is the current permitted capacity of the wastewater
treatment facility? N/A
C. Actual treatment capacity of the current facility
(current design capacity)? N/A
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: N/A
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The
existing treatment facilities consist of an oil/water
separator, a 10,000 gallon oil holding tank and two
10,000 gallon wastewater tanks, followed by the spill
prevention containment area and a final holding pond.
f. Please provide a description of proposed wastewater
treatment facilities: N/A
g. Possible toxic impacts to surface waters: N/A
h. Pretreatment Program (POTWs only): N/A
NPDES Permit Staff Report
Version 10/92
Page 2

2. Residuals handling and utilization/disposal scheme: N/A
3. Treatment plant classification (attach completed rating
sheet): Class II
4. SIC Code(s): 5171
Wastewater Code(s) of actual wastewater, not particular
facilities, i.e., non -contact cooling water discharge from a
metal plating company would be 14, not 56.
4.
Primary: 53 Secondary:
Main Treatment Unit Code: 53000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
N/A
2. Special monitoring or limitations (including toxicity)
requests: N/A
3. Important SOC, JOC or Compliance Schedule dates: (please
indicate) N/A
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available? Please provide
regional perspective for each option evaluated.
Spray Irrigation: N/A
Connection to Regional Sewer System: N/A
Subsurface: N/A
5. Air Quality and/or Groundwater concerns or hazardous materials
utilized at this facility that may impact water quality, air
quality, or groundwater: Hazardous materials stored at
the site may have the potential to impact groundwater.
6. Other Special Items: N/A
NPDES Permit Staff Report
Version 10/92
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
The wastewater facilities at Marathon Petroleum Company
consists of an oil/water separator, an oil storage tank, a
wastewater storage tank and a settling pond, prior to the
wastewater being discharged into an unnamed tributary to Long
Creek. Stormwater collected in the diked tank farm also discharges
into the settling pond. The discharge from the pond is controlled
by an outfall control valve, and the amount of discharge depends on
rainfall. Storm water is also directed to the pond via the storm
water drainage system.
According to Mr. Joiner, Terminal Supervisor, the tank bottom
water is stored in two 10,000 gallon storage tanks and pumped and
hauled in trucks to Atlanta, Georgia for disposal by a company
called Alternate Energy Resources, Inc.,. The wastewater
facilities at the Marathon terminal appeared to be well operated
and maintained.
During the site investigation, it was noted that the bare
areas were seeded and rip -rap was installed around the eroded area
above the settling pond. Those measures were provided per this
Office's suggestion to reduce settleable matter in the pond.
It is recommended that the NPDES permit for this facility be
renewed pending review by the Groundwater Section.
Signature of Repprt Preparer
Water Quality Rgi
;•/
Date
NPDES Permit Staff Report
Version 10/92
1 Supervisor
Page 4