NC0021971_Owner name Change_20060928

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
REVISED
Alan W. Klimek, P.E. Director
Division of Water Quality
September 28, 2006
Keith Lewis
Terminal Manager
BP Products North America
P.O. Box 86
Paw Creek, NC 28130
Subject NPDES Permit Modification
Permit NC0021971
Charlotte BP Terminal/Paw Creek
formerly Charlotte Paw Creek Terminal #2
Mecklenburg County
Dear Mr. Lewis:
Division personnel have reviewed and approved your request to transfer ownership of the subject permit,
received on February 8, 2006. This permit modification documents the change in ownership.
Please find enclosed the revised permit. All other terms and conditions contained in the original permit remain
unchanged and in full effect. This permit modification is issued under the requirements of North Carolina General
Statutes 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency.
If you have any questions concerning this permit modification, please contact the Point Source Branch at (919)
733-5083 extension 363.
Sincerely,
Alan W. Klimek, P.E.
cc Central Files
Mooresville Regional Office, Surface Water Protection
NPDES Unit File
one NCarol na
tural�y
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

Permit NC002'1971
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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,
BP Products North America
is hereby authorized to discharge wastewater from outfalls located at the
Charlotte BP Terminal/Paw Creek
7401 Old Mount Holly Road
Charlotte
Mecklenburg County
to receiving waters designated as Paw 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.
This permit shall become effective February 10, 2006.
This permit and authorization to discharge shall expire at midnight on June 30, 2010.
Signed this day February 10, 2006.
pp
h,r ./ Alan W. Klimek, P.E., 'rector
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0021971
SUPPLEMENT TO PERMIT COVER SHEET
BP Products North America
is hereby authorized to:
1. continue to operate the existing water pollution control system consisting of:
• oilwater separation
• containment basins
located at the Charlotte BP TerminallPaw Creek at 7401 Old Mount Holy Road near Charlotte in
Mecklenburg County, and
2. discharge stormwater and loading rack wash water from said treatment facility through Outfall 009 at
a specified location (see attached map) into an unnamed tributary to Paw Creek, a waterbody
classified as C waters within the Catawba River Basin.

Latitude: 35°16'3T' N
Longitude: 80°56'05' W
Quad # F15SW/Mountain Island Lake
Receiving Stream: UT to Paw Creek
Stream Class: C
Subbasin: 30834
NC0021 971
Charlotte BP Terminal
Paw Creek

Permit NC0021971
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge from Outfall 009. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location
Flows
Episodic
1
Effluent
Total Suspended Solids
45.0 mg/L
Monthly
Grab
Effluent
Oil and Grease2
Monthly
Grab
Effluent
Turbidity3
50 NTU
Monthly
Grab
Effluent
Benzene
Quarterly
Grab
Effluent
Toluene
Quarterly
Grab
Effluent
Ethyl Benzene
Quarterly
Grab
Effluent
Xylene
Quarterly
Grab
Effluent
Naphthalene4
Monthly
Grab
Effluent
Acute Toxicity5
Annually
Grab
Effluent
Footnotes:
1. Flow - During periods of no flow, the Permittee shall submit a monthly Discharge Monitoring Report
(DMR) indicating "No discharge." Flow must be measured with each discharge event and may be
monitored in one of four ways:
a) measure flow continuously;
b) calculate flow based on total rainfall per area draining to the outfall; exclude built -upon
area (best method for facilities with large runoff -collection ponds); see special
condition A.(3.) for rational equation.
c) estimate flow at 20-minute intervals during the entire discharge event; or
d) report flow based on discharge pump logs.
2. Oil and Grease - Where possible, the grab sample for oil and grease should be skimmed from
the surface of a quiescent zone.
3. Turbidity - Effluent shall not cause receiving stream turbidity to exceed 50 NTU. If receiving stream
background turbidity exceeds 50 NTU, effluent shall not cause this background value to increase.
4. Naphthalene - Monitoring requirement applies to facilities that store, or historically stored, diesel or
other heavy fuels on site.
5. Acute Toxicity (Fathead Minnow, 24-hour), Annual [see Special Condition A.(2.)]. Permit holder shall
sample for acute toxicity and BTEX concurrently.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
There shall be no direct discharge of tank solids, tank bottom water, or the rag layer.
There shall be no direct discharge of tank (or pipe) contents following hydrostatic testing unless benzene
concentration is less than 71.4 µg/1 and toluene concentration is less than 11 141.

Permit NC0021971
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (2.) ACUTE TOXICITY MONITORING (ANNUAL)
The Permittee shall conduct annual toxicity tests using protocols defined as definitive in EPA 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: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch 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 chemicalphysical 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 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.

Permit NC002 1971
A. (3.) RATIONAL EQUATION
The Rational Equation: Q=KuCIA, where:
Q = flow (peak flow rate (cfs or m3/sec)
Ku = units conversation factor = 1.008 for U.S. standard units (usually ignored
because it is so close to 1), or 0.278 for SI units
C = dimensionless runoff coefficient for the watershed, loosely defined as the
ratio of runoff to rainfall
I = intensity of rainfall taken from the intensity -duration -frequency curves
for the specified design return period at the time of concentration, tc
(in/h or mm/h). tc = time of concentration (time after the beginning of
rainfall excess when all portions of the drainage basin are contributing
simultaneously to flow at the outlet).
A = area of tributary watershed (acres or km2)
The rational equation is used to calculate the runoff from a region, given:
• the runoff coefficient which accounts for infiltration and other potential
losses in the region,
• the rainfall intensity to the region,
• the time it takes for runoff to travel from the region's upper reaches to its
outlet, and the region's drainage area.