NC0046213_Technical Correction_20150819

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Mr. T. J. Aydt, Deputy Assistant Secretary
Marathon Petroleum Company LP
539 South Main Street
Findlay, OH 45840-3229
Dear Mr. Aydt:
Donald R. van der Vaart
Secretary
August 19, 2015
Subject: Change-Page(s) to Correct Error
NPDES Permit NCO046213
Marathon Petroleum Company LP -
Charlotte Terminal
Mecklenburg County
The Division of Water Resources (the Division) staff noted the wrong toxicity monitoring page was inserted
into your recently issued permit (July 27, 2015). Section A.(2.) should have been for Acute Toxicity
Monitoring (Pimephales promelas) with parameter code TAE6C.
Accordingly, we hereby forward the modified permit pages to amend Section A.(2.) of your permit with the
following: Acute Toxicity Monitoring (Pimephales promelas) quarterly with parameter code TAE6C.
Please insert these change pages into your existing permit and discard the old pages. We regret any
inconvenience this causes your organization.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Resources or any other Federal,
State, or Local governmental permits that may be required.
If you have questions, or if we can be of further service, please contact Derek Denard at
[[e-mail]] or call [phone].
espe fully, !
S. Jay Zimmerman, ctor
Division of Water Resources, NCDENR
Enclosure: NPDES Permit NCO046213 (Corrected Pages)
hc: Central Files
NPDES Program Files
MRO Files/ Attn: Michael Parker
ec: Richard Farmer [[e-mail]]
Aquatic Toxicology Unit/ Susan Meadows [[e-mail]]
Greg Moore, Marathon Petroleum Company LP [[e-mail]]
Thomas G. Leigh, Marathon Petroleum Company LP [[e-mail]]
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] \ Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer —Made in part by recycled paper

Permit NCO046213
A. (2.) ACUTE TOXICITY MONITORING (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined as
definitive in EPA Document EPA-821-R-02-012 entitled "Methods for Measuring the Acute Toxicity of
Effluents and Receiving Waters 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 during representative effluent discharge and shall be performed at
the NPDES permitted final effluent discharge below all waste treatment processes.
The parameter code for Pimephales promelas 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, DWR Form AT-1 (original) is to be
sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
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 Resources 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 and will
require immediate follow-up testing to be completed no later than the last day of the month following the
month of the initial monitoring.
Page 4 of 7

Permit NCO046213
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge treated stormwater and wastewater from Outfall 001. Such discharges shall be limited, monitored and reported'
by the Permittee as specified below:
EFFLUENT CH_LIMITS..:
ItACTERISTICS
[Parameter Code)
.
MONITORING REQU tEMEN—.
Monthly
Avera a
, : wily
Maximum
MeasuremeQt
Frque-acy
Sample
Type
Sample
Location .
50050 Flow 2 MGD)
Episodic
2
Effluent
C0530 Total Suspended Solids m )
30.0 m
45.0 m
Monthly
Grab
Effluent
00070 Turbidity 3 (NTU)
50 NTU
Monthly
Grab
Effluent
[005561 Oil and Grease (mg/L)
EPA Method 1664 SGT-HEM
Monthly
Grab
Effluent
[327301 Total Recoverable
4
(µ Phenolics
Monthly
Grab
Effluent
34030] Benzene 4 qt
Monthly
Grab
Effluent
34010 Toluene 4 (g/L)
Quarterly
Grab
Effluent
[34371 ] Ethyl Benzene 4 (
Quarterly
Grab
Effluent
81551 X lene 4(ttgp
Quarterly
Grab
Effluent
34696] Naphthalene 4 ( )
Quarterly
Grab
Effluent
22417] MTBE 4 (
Quarterly
Grab
Effluent
RAW] Acute Toxicity 5
Quarterly
Grab
Effluent
Footnotes:
1. No later than 270 days from the effective date of this permit, the permittee shall begin submitting discharge monitoring
reports electronically using the Division's eDMR application system [see A. (4)].
2. Flow shall be monitored with each discharge event — During periods of no flow, the Permittee
shall submit a signed, monthly Discharge Monitoring Report (DMR) indicating "No discharge." Flow
may be monitored using any one of four methods:
a) measure flow continuously (via flow meter, totalizer preferred);
b) calculate flow (see Rational Equation ) based on total rainfall per unit area
draining to the outfall [see A. (3.)];
c) estimate flow at 20-minute intervals during the entire discharge event; or
d) report flow based on discharge pump logs.
3. Turbidity — Effluent shall not cause receiving stream turbidity to exceed 50 NTU. If receiving -stream
background exceeds 50 NTU, the effluent shall not increase background levels. Non-compliance with
this Standard may require additional stream monitoring and a Turbidity Corrective Action Plan (TCAP).
4. This sample to be collected concurrently with Acute Toxicity.
5. Acute Toxicity (Fathead Minnow, 24-hour), Quarterly during January, April, July and October [see
section A. (2)].
Conditions:
• There shall be no discharge of floating solids or foam visible in other than trace amounts.
• The Permittee shall discharge no tank solids, tank bottom water, or the rag layer.
• Following hydrostatic tank or pipe testing, the Permittee shall discharge no wastes containing benzene
concentrations greater than 1.19 µg/L, or toluene concentrations greater than 11 µg/L.
Page 3 of 7