NC0046892_Permit Modification_19940228

otate of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. H. James Sewell
Shell Oil Company
Eastern Transportation Region
1415 West 22nd Street
Oak Brook, IL 60522-9008
Dear Mr. Sewell:
AA
EI)EHNR
February 28, 1994
Subject: NPDES / NC0046892
Shell Oil / Charlotte Distribution Plant
Mecklenburg County
In accordance with your application for discharge permit modification received on August 2, 1993, we
are 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. In response to your letter of February 1,
1994, regarding your draft permit, the following NPDES permit comments are for your clarification. They
are in the same order as the February letter.
a.) The general comments of the mailing address and the three sources of outfall 002 have been noted and
changes have been made accordingly. The sources have been added to the effluent page for outfall 002 for
further clarification.
b.) According to the Division's Certification and Training unit, a groundwater remediation unit is
automatically considered a class I facility. However, at this time, groundwater remediation facilities do not
need to have a certified operator. This is because the Division is in the process of developing a training class
for this type of facility. This class will certify operators for groundwater remediation systems. Until the
development process is complete, no certified operator is required.
c.) Outfall 001 requests - Oil and grease and settleable solids have been reviewed for the reduction of the
monitoring requirements. Due to the state requirements and the sensitivity of the area, the frequencies will
remain the same. Also, the request for toxicity testing elimination will not be granted. However, because
previous required episodic tests have been passed, the previous testing requirement has been removed and
replaced with an annual acute toxicity test.
d.) Outfall 002 requests - Oil and grease and pH are monitored at the twice per month frequency. This is
the standard frequency for this type of discharge and will remain.
The state standard for benzene in a water supply waters is 1.19 µg/1 as is the limit which was given to
this facility. This limit was established to protect human health. Therefore, the limit will remain at 1.19 µg/l.
The Division will agree to review the permit requirement for the whole -effluent toxicity test upon permit
renewal in 1996.
e.) With this NPDES application, an authorization to construct (ATC) request was also included. It was for
the new groundwater remediation system which included an air stripper and activated carbon system. Is this
system still the intended system? If not please submit the correct system with all the necessary plans and
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportuniiy Affirmative Action Employer 50% recycled/ 10% post -consumer paper

.
February 28s, 1994
Shell Oil Company
NPDES permit NC0046892 •
specifications with PE stamps if individually designed. Also, in a previous letter, DEM stated that the ATC
will be retained in house and be issued with the NPDES permit providing the ATC application fee of $150.00
was sent in. As of February 21, 1994 the fee had not been sent in. DEM will keep the ATC request in-house
for two weeks from the date of this letter. If no fee is sent in with a letter confirming what was requested,
then the package will be returned.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicative 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. Randy Kepler at telephone number
919/733-5083.
Sincerely,
Original Signed By
Coleen H. Sullins
A. Preston Howard, J
cc: Mr. Jim Patrick, EPA
Mooresville Regional Office
Jack Floyd, Groundwater Section
Permits and Engineering
Compliance
Central Files

Permit No. NC0046892
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
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
NC Highway 27
Thrift Community
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, and III hereof.
This permit shall become effective April 1, 1994
This permit and the authorization to discharge shall expire at midnight on August 31, 1996
Signed this day February 28, 1994
Original Signed By
Coleen H. Sullins
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
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 outfall 001 at an oil terminal facility located at Charlotte
Terminal, NC Highway 27, Thrift Community, Mecklenburg County (See Part III of this
Permit), and
2. After receiving an Authorization to Construct from the Division of Environmental Management,
construct a groundwater remediation system and discharge from outfall 002 treated groundwater,
tank condensate, and hydrocarbon contaminated stormwater from the truck loading rack, and
3. 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.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL 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 001. Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics Discharge Limitations
J..bs/day Units (Specify)
Mon. Avg. Daily Max. Monthly Avq. Daily Max.
Flow **
Oil and Grease
Settleable Solids
Acute Toxicity ***
Organics *****
Monitoring Requirements
Measurement Sample
Frequency Type
*Sample
Location
Weekly Instantaneous E
30.0 mg/I 60.0 mg/I 2/Month Grab E
0.1 ml/I 0.2 ml/I 2/Month Grab E
Annually Grab E
* Sample Locations: E - Effluent
Samples taken in compliance with the monitoring requirement specified above shall be taken at the following location(s): the nearest accessible point after
final treatment but prior to actual discharge to or mixing with the receiving waters.
Monitoring will be conducted during normal work hours. The facility shall record the appropriate time the discharge begins and stops during a discharge
period.
This Permit imposes no limitation of the discharge of storm water runoff uncontaminated by any industrial or commercial activity and not discharged
through any oil/water separator or other treatment equipment or facility.
** The discharger shall record the approximate times that discharge began and ended, along with the instantaneous flow at the times of effluent sampling.
*** Acute Toxicity (Fathead Minnow 24 hour) Monitoring, Annually, See Part III, Condition E.
***** See Part III, Condition F.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL 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 - contaminated groundwater, tank condensate water and truck loading rack contaminated 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 Discharge Limitations Monitoring Requirements
Lbs/day Units (Specify) Measurement Sample *Sample
Monthly Avg. Daily Max. Monthly Avg. Daily Max. Frequency Tyne Location
Flow Continuous Recording E
OH and Grease 30.0 mg/I 60.0 mg/I 2/Month Grab E
Benzene 1.19 µg/I Monthly Grab E
Toluene 11.0 µg/I Monthly Grab E
1,2 Dichioroethane 99.0 µg/I Monthly Grab E
Lead 25.0 µg/I Monthly Grab E
Xylene Monthly Grab E
MTBE Monthly Grab E
Chronic Toxicity *** Quarterly Composite E
* Sample Locations: E - Effluent
BTEX parameters should be monitored using an EPA -approved method to a detection level of 1 ppb. The monitoring for the above listed parameters
should coincide with all whole -effluent toxicity monitoring.
*** Chronic Toxicity (Ceriodaphnia) P/F at 90%; February, May, August, November, See Part III, Condition H.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.