NC0082970_Permit Modification_19970110

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
January 10, 1997
Mr. G. M. Allen
Manager, Safety & Environmental Compliance
Colonial Terminals, Inc.
North Lathrop Avenue
Savannah, Georgia 31402-0576
4
[DEHNF1
Subject: NPDES Permit Modification
Permit No. NC0082970
CTI / Wilmington Terminal
New Hanover County
Dear Mr. Allen:
On June 24, 1996 the Division of Water Quality issued NPDES Permit No. NC0082970 to Colonial
Terminals, Inc. for their Wilmington terminal. A review of the permit file has indicated that an error was
inadvertently made in the permit. Accordingly, we are forwarding herewith a modification to the subject
permit to correct the error. This permit modification is to the effluent limitations page for outfall serial
number 001. The modification removes the footnote referenced from the EPA Method 624/625 condition.
There is no special condition for this requirement.
Please find enclosed an amended effluent limitations page for outfall 001 which should be inserted into
your permit. The old page should be discarded. All other terms and conditions contained in the original
permit remain unchanged and in full effect. These permit modifications are issued pursuant to 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 any parts, measurement frequencies or sampling requirements contained in this permit modification
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.
If you have any questions concerning this permit modification, please contact Mr. Mark McIntire at
telephone number [phone], extension 553.
Sincerely,
4
A. Preston Howard, Jr., P.E.
cc. Wilmington Regional Office / Water Quality fectdion
a
Central Files
Permits and Engineering Unit / Permit File
Facility Assessment Unit
Aquatic Survey and Toxicology Unit
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

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NCOO82970
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
Flow 1
Total Suspended Solids
Oil and Grease2
EPA Methods 624/625
Benzene
Toluene
Acute Toxicity3
Discharge Limitations
Monthly Avg. * Weekly Avg. Daily Max.
45.0 mg/1
45.0 mg/1
Monitoring Reauirements
Measurement
Sample
Sample
Frequency
Type
Location
Monthly
1
Effluent
Monthly
Grab
Effluent
Monthly
Grab
Effluent
Semi-annually
Grab
Effluent
Monthly
Grab
Effluent
Monthly
Grab
Effluent
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 :low 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 Acute Toxicity (Fathead Minnow, 24-hour) Monitoring, Episodic, 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 71.4 ug/1 and toluene
concentration is less than I I ug/l.