NC0046892_Permit Issuance_19960802

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
August 2, 1996
Mr. H. James Sewell
Shell Oil Company
Eastern Transportation Region
1415 West 22nd Street
Oak Brook, Illinois 60522-9008
Dear Mr. Sewell:
EDEHNF
Subject: NPDES Permit Issuance
Permit No. NC0046892
Shell Oil/Charlotte Terminal
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. Your letter
dated May 9, 1996, had comments pertaining to hydrostatic testing, flow monitoring, sampling for oil and
grease, and monitoring for EPA 624/625. For clarification of the final permit the following responses are
provided:
• The contents of hydrostatically tested tanks may be discharged if the benzene and toluene
concentrations are less than 1.19 and 11.0 ug/1, respectively.
• Flow monitoring may be achieved through the use of tank level gauges (for outfall 002).
• The proper method to collect an oil and grease sample is to skim from the surface.
• Semi-annual monitoring with EPA 624/625 is necessary to identify possible parameters present in the
discharge. Monitoring for chlorophenolic compounds is addressed below.
• The Division will consider reducing the monitoring frequency of certain parameters with a request for
a permit modification given the results of a minimum of 8 to 12 sampling events.
• To keep the permit consistent with all ground water remediations in the Paw Creek area, the following
parameters were added for monitoring: Ethylbenzene, Phenol, Fluorene, Napthalene, and
Phenanthrene. Limits for Flow, Benzene, Toluene, and Total Suspended Solids were also added for
this reason.
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 not covered by EPA Method 625 are not
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

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 µgll, 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).
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
Permits and Engineering Unit
Mecklenburg County Environmental Protection
Facilities Assessment Unit
Aquatic Survey and Toxicology Unit

Permit No. NC0046892
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,
Shell Oil Company
is hereby authorized to discharge wastewater from a facility located at
Charlotte Terminal
6851 Freedom Drive
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,
II, 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. NC0046892
SUPPLEMENT TO PERMIT COVER SHEET
Shell Oil Company
is hereby authorized to:
1. Continue to discharge stormwater from diked tank -storage area from outfall 001; and
discharge stormwater from truck -loading racks and groundwater after treatment through
oil/water separators, GAC units, air stripper, flocculation tank, clarifier and holding tank
prior to discharge from 002. Both outfall 001 and 002 are located at the Shell Charlotte
Terminal, 6851 Freedom Drive, Mecklenburg County (See Part III of this Permit), and
2. Discharge 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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Latitude 35°16'42" Longitude 80°56'27"
Map # F15SW Sub -basin 030834
Stream Class WS-IV 11-120-42.5) 8/3/96
Discharge Class 100% Industrial
Receiving Stream Paw Creek/Catawba River
Design 0 Variable Permit expires 8/31/01
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SCALE 1.:24 000
1 MILE
7000 FEET
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1 KILOMETER
CONTOUR INTERVAL 10 FEET
Shell Oil/Charlotte Terminal
NC0046892
Mecklenburg County
Fuel Terminal Facility

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0046892
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 Permittee as specified below:
Effluent Characteristics Discharge Limitations
Monitoring Requirements
Measurement Sample Sample
Monthly Avg. Weekly Avg. Daily Max. Frequency Type Location
Flow 1 Monthly 1 Effluent
Total Suspended Solids 45.0 mg/1 Monthly Grab Effluent
Oil and Grease2 Monthly Grab Effluent
Phenol rOq ,/Q Monthly Grab Effluent
Benzine Monthly Grab Effluent
'ylene Semi-annually Grab Effluent
EPA Methods 624/6253 -Furl'eLj Semi-annually Grab Effluent
Annually Grab Effluent
Mn6l
Footnotes: o c, p), a
I 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.
2 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 chlorophenol(s) is detected at concentrations greater than or equal to 50 µg/1, the
pennittee 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 permit. 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 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 contents following hydrostatic testing unless benzene concentration is less than 1.19 ug/1 and toluene
concentration is less than 11 ug/1.
Acute Toxicity4
)1. (p frI°ik

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0046892
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 002 - treated groundwater and truck loading rack stormwater. These waters will pass through an approved
treatment system prior to discharge. Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Flow 1
Total Suspended Solids
Oil and Grease
Benzene
Toluene
Xylene
Ethylbenzene
Phenol
1, 2 Dichloroethane
Iron
Manganese
Methyl Tert-Butyl Ether
Lead3
Napthalene
Fluorene
Phenanthrene
Acute Toxicity4
Discharge Limitations
Monthly. Avg.
0.058 MGD
Daily Max.
Measurement
Frequency
Continuous
30.0 mg/l Monthly
Monthly
1.19 µg/I Monthly
11.0 14/1 Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Quarterly
Monitoring Requirements
Sample Sample
Type Location
Recording
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Effluent
Effluent
Effluent2
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Footnotes:
I Flow shall be limited to intermittent discharges of 24 hours or less, twice per month. Flow shall be monitored continuously during each discharge.
Flow shall be released in such a way that erosion is minimized and no discharge of sediments that may have collected in the bottom of tanks is
released.
2 The grab sample for oil and grease should be skimmed from the surface in a quiescent zone, such as the clarification tank.
3 If no Lead is detected during the first eight sampling events, then Lead monitoring is no longer required and may be discontinued for the remainder
of the permit term.
4 Acute Toxicity (Fathead Minnow) P/F at 90%; February, May, August, November, See Part III, Condition F.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0046892
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.
AAM Fathead 24 Version 3/96

Permit No. NC0046892
Part III
F. ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology for Determining Acute
Toxicity in a Single Effluent Concentration." The monitoring shall be performed as a Fathead
Minnow (Pimephales promelas) 24 hour static test, using effluent collected as a single grab
sample. The effluent concentration at which there may be at no time significant acute mortality is
90% ( defined as treatment two in the North Carolina procedure document). Effluent samples for
self -monitoring purposes must be obtained during representative effluent discharge below all waste
treatment. The first test will be performed after thirty days from the effective date of this permit
during the months of February, May, August, and November.
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 parameter code
TGE6C. Additionally, DWQ Form AT-2 (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 single quarterly monitoring indicate a failure to meet specific limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
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 retesting (within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.

�-larcia 44-1-(=u-Pel)
SOC PRIORITY PROJECT: Yes_No X
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Steven D. Pellei U
Date: 4/12/96 Cl)
NPDES STAFF REPORT AND RECOMMENDATION
L?-; .. ,� y
County: Mecklenburg •cY'
Permit No. NC0046892
PART I - GENERAL INFORMATION
1. Facility and Address: Shell Oil Company
6851 Freedom Drive
Charlotte, NC 28214
2. Date of Investigation: 4/12/96
3. Report Prepared By: Todd St. John
4. Persons Contacted and Telephone Number: Craig Kean [phone]
5. Directions to Site: This facility is located at the intersection of Old Mount Holly Road and
Freedom Drive in Paw Creek.
6. Discharge Point(s). List for all discharge points: Outfalls 001 and 002 are located
approximately 3 feet apart.
Latitude: 35° 16' 42" Longitude: 80° 56' 27"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on map.
U.S.G.S. Quad No.: F15SW U.S.G.S. Name: Mountain Island Lake, NC
7. Site size and expansion are consistent with application?
Yes X No_ If No, explain:
8. Topography (relationship to flood plain included): Flat to gently sloping. Site is not located
in a flood plain.

•
9. Location of nearest dwelling: None within 500 feet.
10. Receiving stream or affected surface waters: UT to Long Creek
a. Classification: WS-IV
b. River Basin and Subbasin No.: 030834
c. Describe receiving stream features and pertinent downstream uses: Receiving stream
is a dry ditch. Typical Class C uses downstream. Public water supply downstream.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 0.025 MGD (Ultimate Design Capacity) for
outfall 002. Varies with rainfall for outfall 001.
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)? 0.025
MGD for groundwater remediation.
d. Date(s) and construction activities allowed by previous Authorizations to Construct
issued in the previous two years: An A to C for the groundwater remediation system
was issued May 16, 1994. An A to C for modifications to this system was issued April
2, 1996.
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: Outfall 001 is for storm water in the containment area. Outfall
002 is for groundwater remediation equipment which consists/will consist of an
oil/water separator, an air stripper, a flocculation tank, a clarifying basin, carbon
filtration and a holding tank.
f. Please provide a description of proposed wastewater treatment facilities: Facilities
described above are currently under construction.
g.
Possible toxic impacts to surface waters: Gasoline constituents are toxic.
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme: Free product is collected and recycled.
Page 2

9
3. Treatment plant classification (attach completed rating sheet): Class I - Groundwater
remediation system.
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.
Primary: 39 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: This issue has been extensively
addressed.
3. Important SOC, JOC or Compliance Schedule dates: N/A (please indicate)
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
Other Disposal Options: N/A
5. Other Special Items: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
Shell oil Company has applied for renewal of the NPDES permit for the facilities at Paw
Creek. A public hearing for this renewal has already been set.
This facility has had problems in the past with chronic toxicity violations. Shell Oil Company
has contended that the problem is a result of the natural groundwater and not gasoline constituents.
This issue has been resolved by allowing Shell Oil to utilize an effluent holding tank for stage
Page 3

discharges so that an acute toxicity test can be utilized instead of a chronic test. Shell Oil feels that
this solution should be adequate.
The facilities at this site appear to be well maintained and operated. Therefore, this Office
recommends renewing the NPDES permit.
P--c
Water Quality! egional Supervisor
4/2 3 y6
Date
Page 4

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