WQ0005906_Final Permit_20030404

0�- W,4TF9
Michael F. Easley, Governor
7 William G. Ross Jr_, Secretary
r North Carolina Department of Environment and Natural Resources
Alan W. Klimek. P.E., Director
Division of Water Quality
April 4, 20C);
ROBERT C. AMOS
Em:LDUPONT DE NEMOURS AND COMPANY
PO BOX 800
KEI;STON. NC 28502-0800
Subject: Permit No. WQ0005906
E.I. DuPont De Nemours and Company
Groundwater Remediation Facilities
Lenoir County
Dear Mr. Amos:
In accordance with your request for renewal received October 28. 2001 we are forwarding herewith
Permit No. WQ0005906, dated April 4, 2003, to E.I. DuPont De Nemours and Company for continued operation
of the subject groundwater remediation facility.
This permit shall be effective from the date of issuance until March 31, 2008, shall void Permit No.
WQ0005906 issued November 30, 2001, and shall be subject to the conditions and limitations as specified
therein. Paease pay particular attention to the monitoring requirements in this permit. Failure to establish an
adequate; system for collecting and maintaining the required operational information will result in future
comptia e.problems.
If any parts. requirements, or Iimitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within thirty (30) days following, receipt of this permit. 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, 6714 Mail Service Center. Raleigh., NC 27699-
6714. ' Unless such demands are made this permit shall be final and binding.
If you have any questions concerning the Groundwater Conditions or groundwater monitoring
requirements. please contact David Goodrich in the Groundwater Section at 715-6162. If you need any additional
information concerning this matter, please contact Michelle Barnett at (919)�733-5083 extension 544.
Sincerely. s
L/
Alan W. Klimek, P.E.
cc: Lenoir County Health Department
Washington Regional Office, Water Quality Section
Washington Regional Office, Groundwater Section
Groundwater Section, Central Office
Water Quality Central Files
N`DPU Files
ASA
Non -Discharge Permitting unit Internet http:/Ail—o.=r.state.nc.us/ndpu t;f-VP&
1617 Mail Service Center. Raleigh, NC 2769946I7 Telephone [phone] Fax [phone]
DENR Customer service Center Telephone 1900 6?3-7748
An Equal Oppormnity Action Employer 50% recycledf 10% post -consumer paper

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
GROUNDWATER REMEDIATION PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended,
and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
E.I. DuPont De Nemours and Company
Lenoir County
MOTION .1
continued operation of a 20,000 GPD groundwater remediation facility to serve E.T. DuPont de Nemours and
Company's Kentec Facility, with no discharge of wastes to the surface waters, pursuant to the application
received October 28, 2002, and subsequent additional information received by the Division, and in conformity
with the project plan, specifications, and other supporting data subsequently filed and approved by the
Department of Environment and Natural Resources and considered a part of this permit.
The approved groundwater remediation facilities shall be capable of treating up to 11,520 gallons per day of
contaminated groundwater and shall consist of the following minimum components: approximately 2,605 linear
feet of six-inch groundwater interceptor piping for removal of groundwater from the surficial aquifer; two simplex
pump stations, each equipped with a one -horsepower pump and high-water alarms, for collection of groundwater
and its conveyance to treatment; a sand filter and a fiber pre -filter for the removal of solids and iron precipitates
from the groundwater; a 600-gallon tank equipped with a transfer pump for equalization of the groundwater and
its pretreatment with ozone; two fiber filters for final pre-treatment polishing of the groundwater; a metering
system for measuring groundwater floe; an Ultrox F-325 including a 14-pound ozone generator and a catalytic
ozone decomposer for the oxidation of contaminants present in the groundwater with ozone and ultraviolet light; a
350-gallon tank equipped with a transfer pump for post -equalization of the groundwater and its conveyance to
additional treatment; two 165-pound activated carbon units for final polishing of the groundwater; two 16,000-
gaIlon tanks equipped with a transfer pump for the storage of the remediated groundwater and its conveyance to
final disposal (i.e., through pump and haul activities); one 1,000-gallon tank for the storage of the remediated -
groundwater and its conveyance to final disposal{i.e., through the infiltration gallery); and all associated piping,
valves, electrical and instrumentation/control systems, and other related appurtenances required to make complete
and functional remediated groundwater disposal facilities.

The approved disposal facilities shall consist of the following minimum components: facilities to recycle up to
2,000 gallons per day of remediated groundwater in the Kentec Facility for reuse in the parts cleaning process;
facilities to collect, transport via railcar, and dispose of up to 20,000 gallons per day of remediated groundwater in
wastewater treatment facilities serving E.I. DuPont de Nemours and Company's Kinston, NC PIant (i_e., NPDES
Permit No. NC0003760), also known as "pump and haul" activities; and the facilities to discharge up to 8,640
gallons per day of remediated groundwater into one 4,625-square foot infiltration gallery approximately 18.5 feet
wide, 250-feet long, and one foot deep; and all associated piping, valves, electrical and instrumentation/control
systems, and other related appurtenances required to make complete. and functional remediated groundwater
disposal facilities
This permit shall be effective from the date of issuance until March 31, 2009, shall void Permit No_
WQ0005906 issued November 30, 2001, and shall be subject to the following specified conditions and
limitations:
1. PERFORMANCE STANDARDS
This permit shall become voidable if the soils fail to adequately assimilate the wastes and may be
rescinded unless the facilities are installed, maintained, and operated in a manner which will protect
the assigned water quality standards of the surface waters and ground waters.
2. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those actions that may be
required by the Division of Water Quality (Division), such as the construction of additional or
replacement treatment or disposal facilities.
3. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface
or groundwaters resulting from the operation of this facility.
4. Any residuals generated from these treatment facilities must be disposed in accordance with General
Statute 143-215.1 and in a manner approved by the Division.
5. Diversion or bypassing of the untreated groundwater from the treatment facilities is prohibited.
1�. OPERATION AND MAINTENANCE REQUIREMENTS
The facilities shall be properly maintained and operated at all times.
2. Upon classification of the wastewater treatment and spray irrigation facilities by the Water Pollution
Control System Operators Certification Commission (WPCSOCC), the Permittee shall designate and
employ a certified operator to be in responsible charge (ORC) and one or more certified operator(s) to
be back-up ORC(s) of the facilities in accordance with I5A NCAC 8G .0201. The ORC shall visit
the facilities in accordance with 15A NCAC SG .0204 or as specified in this permit and shall comply
with all other conditions specified in these rules.
The facilities shall be effectively maintained and operated as a non -discharge system to prevent the
discharge of any wastewater resulting from the operation of this facility.
4. The Permittee shall provide for the maintenance of an audible and visual high-water alarm on all pumping
and storage facilities associated with the groundwater remediation and disposal facilities.
5. No wastes other than remediated groundwater from E.I. DuPont de. Nemours and Company's Kentec
Facility shall be disposed of in the permitted disposal facilities.

6. When the option to pump and haul remediated groundwater is exercised, the remediated groundwater a
shall not exceed the following Iimitations:
Monthly Average Maximum
Parameter Railcar Concentration Railcar Concentration
1,I-Dichloroethane 14 µg/L 21 µg/L
I,I-Dichloroethene 14 µg/L 21 µg/L
1,4-Dioxane 200 µg/L 200 µg/L
:1
The Corrective Action Plan for the Kentec Facility, dated July 11, 1991, states that the facilities are
capable of producing concentrations of 1,1-Dichloroethane, I,I-Dichloroethene, and 1,4-Dioxane of
seven micrograms per Iiter, seven micrograms per liter, and 100 micrograms per Iiter, respectively.
7. When the option to pump and haul remediated groundwater is exercised, remediated groundwater shall be
collected in a 20,000-gallon railcar, and each shall be sampled and analyzed to determine compliance with
Condition H. 5. prior to being introduced into any pnmary components at the wastewater treatment facility
serving E.Z. DuPont de Nemours and Company's Kinston, NC Plant. The introduction rate of remediated
groundwater shall not exceed 20,000 gallons in a 24-hour period.
III. MONITORING AND REPORTING REOUIREMENTS
1. Any monitoring deemed necessary by the Division to insure surface and ground water protection will
be established and an acceptable sampling reporting schedule shall be followed.
2. When the option -to pump and haul remediated groundwater is exercised, an accurate record of the pump
and haul activities shall be maintained by the Permittee. The following minimum information shall be
documented:
a. Date remediated groundwater is removed,
b. Name of the facility from which remediated groundwater is removed,
c. Name of the facility receiving the remediated groundwater,
d. Volume of remediated groundwater removed, and
e. Analytical results of remediated groundwater sampling stipulated in Condition 11. 5. and Condition H.
6_
The record of the pump and haul activities shall be submitted monthly to the Water Quality Section of the
Division's Washington Regional Office on or before the fifteenth day of the month following the activities
being reported. Mail the record to the NCDENR-DWQ, Washington Regional Office, 943 Washington
Square Mall. Washington, NC 27889.
Noncompliance Notification:
The Permittee shall report by telephone to the Washington Regional Office, telephone number (252)
946-6481, as soon as possible, but in no case more than 24 hours or on the next working day
foIIowing the occurrence or first knowledge of the occurrence of any of the following:
a. Any occurrence at the groundwater remediation facility which results in the treatment of
significant amounts of contaminated groundwaters which are abnormal in quantity or
characteristic, such as the dumping of the contents of a basin or tank, the known passage of a slug
of hazardous substance through the facility, or any other unusual circumstances;
b. Any process unit failure, due to known or unknown reasons, that renders the groundwater
treatment and disposal system incapable of adequate treatment and disposal, such as mechanical
or electrical failures of pumps, aerators, compressors, etc_;

c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass directly to
receiving waters without treatment of all or any portion of the influent to such station or facility;
or
d. Any time that self -monitoring information indicates that the groundwater treatment and disposal
system is not in compliance with any specified permit limitations.
Occurrences outside normal business hours may also be reported to the Division's Emergency
Response personnel at telephone number [phone], [phone], or [phone].
Persons reporting such occurrences by telephone shall also file a written report in letter form within
five (5) days following first knowledge of the occurrence. This report must outline the actions taken
or proposed to be taken to ensure that the problem does not recur.
IV. GROUNDWATER REQUIREMENTS
1. System Performance Requirements:
a. The groundwater remediation facilities shall consistently achieve at least 95 percent of the
contamination present in the influent groundwater or the Groundwater Quality Standards
stipulated in 15A NCAC 2L (i.e., whichever is higher) prior to discharge into the infiltration
gallery. If the facilities fail to achieve this performance standard consistently. additional
groundwater remediation facilities or changes in operation may be required,
2. Operational Requirements:
a. The groundwater recovery, treatment and disposal system shall be inspected weekly. If it is
determined that the system is malfunctioning, all repairs should be made as soon as possible and
reported to the Washington Regional Office within 48 hours. If not already performed, all
components of the groundwater recovery, treatment and disposal system shall be properly
weather proofed to prevent freezing and failure of the system-
b. The infiltration gallery shall be operated above the water table at all times.
3. Sampling Requirements:
a. The influent and effluent from the treatment system shall be sampled monthly for the following
parameters:
1.1-Dichloroethene PH
1, I -Dichloroethene 1,4-Di oxane
b. Shallow groundwater monitoring welIs MW-1, MW-3, MW-4A, MW-6, MW-7A, MW-8, MW-
10A, MW-11A, MW-14A, and MW-15 as well as deep groundwater monitoring wells MW-4B,
MW-7B, and MW-14B shall be sampled every January and July for the following parameters:
1,IDichloroethane pH
l,l-Dichloroethene Water Level
1.,4-Dioxane

Shallow groundwater monitoring wells MW-9 and MW-12 shall be sampled on a schedule to be
prescribed by the Groundwater Section of the Division's Washington Regional Office after
review of the results from each sampling event. Sampling shall be for the following parameters:
1, I -Dichloroethane pH
1,1-Diehl oroethene Water Level
1,4-Dioxane
Water levels in the groundwater monitoring wells shall be measured prior to sampling the
groundwater for the remaining parameters. The depth to water in each well shall be measured
from the surveyed point on the top of the casing, which shall be surveyed relative to a common
datum.
c. Surface water monitoring location SWA I shall be sampled every January and July for the
following parameters:
1, I-Dichloroethane 1,4-Dioxane
1,1-Dichloroethene
d. EPA Method 601 shall be used for the analyses of I,1-Dichloroethane and 1,1-Dichloroethene,
and EPA Method 8260B shall be used for the analysis of 1,4-Dioxane. The detection limit for all
parameters shall be at or below the groundwater quality standards stipulated in 15A NCAC 2L or
the lowest practical limit possible by the laboratory. Any parameters detected above the Method
Detection Limit (MDL), but below the PQL of 0.5 µg/L shall be qualified (i.e., estimated) and
reported.
e. Any laboratory selected to analyze parameters shall be Division -certified for those parameters
required.
4. Documentation and Reporting Requirements:
a. The results of the sampling and analysis shall be received on the most -recent version of
"Groundwater Quality Monitoring: Compliance Report Form" (i.e., GW-59 Form) with copies of
the laboratory analyses attached by the Division's Groundwater Section on or before the last
working day of the month following the sampling month.
b. AlI reports shall be mailed to the following addresses:
NCDENR-DWQ
Groundwater Section
Permits and Compliance Unit
1636 Mail Service Center
Raleigh, NC 27699-1636
Updated blank reporting forms may be downloaded from the web site for the Division's
Groundwater Section at http://gw.chnr_state.nc.us/ or requested from one of the two addresses
listed above.

c. The Permittee shall retain records of all monitoring information, including calibration and
maintenance records, continuous monitoring data, and reports required by this permit for at least
three years from the date of sample measurement, report, or applications. Records of this
monitoring information shall include, but shall not be limited to, the following:
i. Date, exact place, and time of sampling or measurements;
ii. Individual who performed the sampling or measurements;
ill. Date of performance of analyses;
iv. Analytical techniques or methods used; and
V. Results of such sampling, measurements, and analyses.
d. The Permittee shall report any monitoring or other information that indicates:
i. Any contaminant may cause an endangerment to an underground source of drinking water,
ii. Any non-compliance with a permit condition due to a malfunction of the groundwater
remediation and disposal facilities; or
iii. Any cause of fluid migration outside the injection zone or area.
The information shall be provided to the Groundwater Section of the Division's Washington
Regional Office verbally within eight hours, telephone number [phone], and as a written
submission within five days of the occurrence. The written submission shall contain a description
of the noncompliant event and its cause as well as the period of noncompliance, including exact
dates and times. If the noncompliant event is not corrected and is expected to continue, steps
taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliant event shall
be provided to the Groundwater Section of the Division's Washington Regional Office in a timely
manner.
e. Sixty days prior to closure of the infiltration gallery, the Permittee shall request a rescission of the
permit from the Division.
Applicable Boundaries:
a. The COMPLIANCE BOUNDARY for the disposal system shall be as specified by regulations in
15A NCAC 2L (i.e., "Groundwater Classifications and. Standards"). The Compliance Boundary
for a disposal system individually permitted after December 31, 1983 shall be established at
either (1) 250 feet from the waste disposal area or (2) 50 feet within the property boundary,
whichever is closest to the waste disposal area. An exceedance of groundwater quality standards
at or beyond the Compliance Boundary shall be subject to immediate remediation action
according to 15A NCAC 2L .0106(d)(2).
b_ In accordance with 15A NCAC 2L, a REVIEW BOUNDARY shall be established around the
disposal system midway between the Compliance Boundary and the perimeter of the waste
disposal area. Any exceedance of groundwater quality standards at the Review Boundary shall
require remediation action in accordance with 15A NCAC 2L .0106(d)(1).
6. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be
provided. As written by Groundwater Section
V. INSPECTIONS
L Adequate inspection, maintenance and cleaning shall be provided by the Permittee to insure proper
operation of the subject facilities.

2. The Permittee or his designee shall inspect the groundwater recovery and treatment facilities to
prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to the
release of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall
maintain an inspection log or summary including at Ieast the date and time of inspection, observations
made, and any maintenance, repairs, or corrective actions taken by the Permittee. This log of
inspections shall be maintained by the Permittee for a period of three years from the date of the
inspection and shall be made available to the Division or other permitting authority, upon request.
3. Any duly authorized officer, employee, or representative of the Division may, upon presentation of
credentials, enter and inspect any property, premises or place on or related to -the disposal site or
facility at any reasonable time for the purpose of determining compliance with this permit, may
inspect or copy any records that must be maintained under the terms and conditions of this permit,
and may obtain samples of groundwater, surface water, or leachate.
VI. GENERAL CONDITIONS
I. Issuance of this permit does not constitute approval for reimbursement from the Leaking Petroleum
Underground Storage Tank Cleanup Funds (15A NCAC 2P).
2. This permit shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other supporting data.
3. This permit is effective only with respect to the nature and volume of wastes described in the
application and other supporting data.
4. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or
there is a name change of the Permittee, a formal permit request must be submitted to the Division
accompanied by an application fee, documentation from the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered on its merits and
may or may not be approved.
5. A set of approved plans and specifications for the subject project must be retained by the Permittee
for the life of this project.
6. Failure to abide by the conditions and lirnitations contained in this permit may subject the Permittee
to an enforcement action by the Division in accordance with North Carolina General Statute 143-
215.6A to 143-215.6C
7. The annual administering and compliance fee must be paid by the Permittee within thirty (30) days
after being billed by the Division. Failure to pay the fee accordingly may cause the Division to
initiate action to revoke this permit as specified by 15A NCAC 2H .0205 (c)(4).
8. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,
rules, regulations, or ordinances which may be imposed by other government agencies (local, state,
and federal) which have jurisdiction.

9. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its extension.
Upon receipt of the request, the Commission will review the adequacy of the facilities described
therein, and if warranted, will extend the permit for such period of time and under such conditions
and Iimitations as it may deem appropriate.
Permit issued this the 4th day of April, 2003
NORTH OLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E_, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0005906
Q

Permit No. WQ0005906
April 4, 2003
ENGINEER'S CERTIFICATION
Partial Final
I, , as a duly registered Professional Engineer in the State of
North Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the project,
Project Name
Location and County?
for the Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation
of the construction such that the construction was observed to be built within substantial compliance and intent of
this permit, the approved plans and specifications, and other supporting materials.
Signature
Date
10
Registration No.

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DUP0NT KFN'I'I;C FACILITY
GROUNDWATER M-ME'DIATION sys,rL'M
LLNOIR COUNTY
WQ0005906/GW01163
SITE DETAIL M,