WQ0007317_Final Permit_19930716

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27604
James B. Hunt, Jr., Governor
July 16, 1993
Mr. Bobby Brantley, Executive Vice President
Dillon Supply Company
Post Office Box 1111
Raleigh, North Carolina 27602
Dear Mr.Brantley:
Jonathan B. Howes, Secretary
Subject: Permit No. WQ0007317
Dillon Supply Company
Groundwater Remediation System
Infiltration Gallery
Wake County
In accordance with your application received December 2, 1992, we are forwarding herewith
Permit No. WQ0007317 dated July 16, 1993, to Dillon Supply Company for the construction and
operation of the subject groundwater remediation system Please note this permit contains requirements for
periodic sampling, monitoring and analysis of both groundwater and soils.
This permit shall be effective from the date of issuance until June 30, 1998, and shall be subject to
the conditions and limitations as specified therein. Please 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 compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable to you, you have
the right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 130B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
Regional Offices
Asheville Fayetteville Mooresville Raleigh . Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/571-4700 919/946-6481 919/395-3900 9191896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
- An Equal Opportunity Affirmative Action Employer

One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this matter, please contact Mr. John Seymour at 9191733-5083.
Sincerely,
A. rPrestrHoward, Jr., P.E.
Director
cc: Wake County Health Department
Raleigh Regional Office, Water Quality Section
Raleigh Regional Office, Groundwater Section
Jack Floyd, Groundwater Section
Applied Environmental Services Inc.
Facilities Assessment Unit
Training and Certification.

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
INFILTRATION GALLERY 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
Dillon Supply Company
Wake County
FOR THE
construction and operation of a 575 GPD groundwater remediation system consisting of two recovery
wells with 3 GPM capacity pumps, a 10 gpm diffused aerator tank with a 105 CFM capacity blower, a 50
gallon storage dosing tank with transfer pump, dual cartridge filters (30 -micron pleated polypropylene
cartridges) piped in parallel, a totalizing flow meter, two carbon canister filters rated at 10 gpm and piped
in series, an 18 foot by 31 foot infiltration gallery area consisting of three disposal trenches each 2 foot by
4 foot by 30 feet long with 3 inch diameter gravity drains (on 8 foot centers), a soil venting system, and all
associated piping, valves, controls, piezometers and appurtenances to serve Dillon supply Company with
no discharge to the surface waters, pursuant to the application received December 2, 1992, and in
conformity with the project plan, specifications, and other supporting data subsequently filed and
approved by the Department of Environment, Health and Natural Resources and considered a part of this
permit.
This permit shall be effective from the date of issuance until June 30, 1998, and shall be subject to
the following specified conditions and limitations:
Upon completion of construction and prior to operation of this permitted facility, a
certification must be received from a professional engineer certifying that the permitted
facility has been installed in accordance with this permit and the approved plans and
specifications. Mail the Certification to the Permits and Engineering Unit, P.O. Box
29535, Raleigh, NC 27626-0535.
2. The Raleigh Regional Office, telephone number 919/ 571-4700 shall be notified at Ieast
forty-eight (48) hours in advance of operation of the installed facilities so that an in-place
inspection can be made. Such notification to the regional supervisor shall be made during
the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding State Holidays.

3 . This permit shall become voidable if the soils fail to adequately absorb 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.
4. 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 as
may be required by this Division, such as the construction of additional or replacement
treatment or disposal facilities.
5. 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.
b. Any sludge generated from these treatment facilities must be disposed of in accordance with
General Statute 143-215.1 and in a manner approved by the North Carolina Division of
Environmental Management.
7. Diversion or bypassing of the untreated groundwater from the treatment facilities is
prohibited.
8. Dillon Supply Company must install and begin operation of the approved groundwater
remediation system within 45 days from receipt of all permits required for its operation.
9. The groundwater remediation system shall operate until analysis from at least three (3)
consecutive sampling events indicates that contaminants in the groundwaters and soils are
at/or below limits set by:
A) The Groundwater Classification Standards (NCAC 2L) and /or
B) Limits approved by the Director of the Division of Environmental
Management.
H. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee shall
employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of
the wastewater treatment facilities. The operator must hold a certificate of the type and
grade at least equivalent to or greater than the classification assigned to the wastewater
treatment facilities by the Certification Commission. The Permittee must also employ a
certified back-up operator of the appropriate type and grade to comply with the conditions
of Title ISA, Chapter 8A, .0202. The ORC of the facility must visit each Class I facility at
least weekly and each Class II, III, and IV facility at least daily, excluding weekends and
holidays, and must properly manage and document daily operation and maintenance of the
facility and must comply with all other conditions of Title 15A, Chapter 8A, .0202. Once
the facility is classified, the Permittee must submit a letter to the Certification Commission
which designates the operator in responsible charge within thirty days after the wastewater
treatment facilities are 50% complete.
3. 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.
7

III. MONITORING AND REPORTING RE0111REMENTS
1. Any monitoring deemed necessary by the Division of Environmental Management to insure
surface and ground water protection will be established and an acceptable sampling
reporting schedule shall be followed.
2. Dillon Supply Company shall collect a minimum of two soil samples from two borings
located in areas known to contain petroleum contaminated soils in order to better
characterize the effectiveness of the remediation system on an annual basis. The Analysis
used shall be the California GC Method with SW -846 Method 5030 and 3550 as split
samples of the soil as described in the DEM publication titled, "Guidelines For Remediation
Of Soil Contaminated By Petroleum" September 1991. The results of the sampling and
analysis shall be sent to the Groundwater Section in the Raleigh Regional Office.
2. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office, telephone number
919/ 571-4700 as soon as possible, but in no case more than 24 hours or on the next
working day following the occurrence or first knowledge of the occurrence of any of the
following:
a. Any occurrence at the wastewater treatment facility which results in the treatment of
significant amounts of wastes 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 render the facility
incapable of adequate wastewater treatment 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.
d. Any time that self-monitoring information indicates that the facility is not in
compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter
form within 15 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.
ra-WRIBUIL`
1. The groundwater treatment system must achieve treatment efficiency that meets 2L
groundwater standards. if the treatment efficiency falls consistently below these standards
then additional treatment facilities may be required.
2. Monitor wells MW -3, 4, 6, and 7 shall be sampled every March, June, September, and
December for water levels and EPA methods 601,602, and 610, plus Xylenes and MTBE.
The water level shall be made prior to sampling for the remaining parameters.
The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management P.O. Box 29535, Raleigh, N.C. 27626-0535 on form GW -59
[Compliance Monitoring Report Form] every April, July, October, and January.
3

3. Monitor wells MW -1 and 2 shall be sampled every June and December for water levels and
EPA methods 601, 602, and 610, plus Xylenes and MTBE. The water level shall be made
prior to sampling for the remaining parameters.
The results of the sampling and analysis shall be sent to the N.C. Division of
Environmental Management P.O. Box 29535, Raleigh, N.C. 27626-0535 on form GW -59
[Compliance Monitoring Report Form] every July and January.
4. The effluent from the treatment system shall be sampled initially after start up and then once
every two (2) weeks for the first three (3) months and monthly thereafter for EPA methods
601, 602, and 610, plus Xylenes and MTBE.
The results of the sampling and analysis shall be sent to the Groundwater Section in the
Raleigh Regional Office, within 30 days of sample collection.
5. Piezometer wells shall be added to each infiltration gallery. These wells shall extend from
the bottom of the gallery to land surface, and shall be screened from the bottom of the
gallery to the lateral lines in the trench. The exact placement shall be approved by the
Raleigh Regional Office. The water level shall be measured every two weeks for the first
three months and monthly thereafter. The results shall be sent to the groundwater Section
in the Raleigh Regional Office within thirty (30) days of collection.
6. Water table contour maps shall be developed every March, June, September, and
December. The map shall be made from measurements taken in all monitor and recovery
wells. The results shall be sent to the Groundwater Section in the Raleigh Regional Office
every April, July, October, and January.
7. Isopleth maps shall be constructed every March, June, September, and December for the
following: benzene, toluene, ethylbenzene, xylenes, MTBE, and total contaminant plume.
The results shall be sent to the Groundwater Section in the Raleigh Regional Office every
April, July, October and January.
8. All components of the groundwater recovery, treatment and disposal system shall be
properly weather -proofed to prevent freezing and failure of the system.
9. 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 Raleigh Regional Office.
10. Two (2) weeks prior to system start-up, the Permittee shall notify the Division of
Environmental Management's Raleigh Regional Office that operation is about to
commence.
11. Upon completion of two (2) successive monitor well sampling events, if no compounds are
detected EPA EPA Method 601 and 610, the permittee may request, in writing, for the
deletion of methods 601 and 610 from the analytical requirements of the permit.
12. Any additional groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
13. Thecompliance Boundary 'for the disposal system is specified by regulations in 15 NCAC
2L, Groundwater Classifications and Standards. An exceedance of Groundwater Quality
Standards beyond the Compliance Boundary is subject to penalty provisions applicable
under General Statute 143-215.6(1)x.
4

For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the infiltration gallery or 50 feet within the
property boundary.
Any sale or transfer of property which affects the location of the compliance boundary shall
be reported immediately to the Director. The permittee shall not transfer land within an
established compliance boundary unless the permittee has satisfied all the requirements of
15A NCAC 2L .107 (e and f).
The REVIEW BOUNDARY for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. A REVIEW BOUNDARY is
established around disposal systems midway between the Compliance Boundary and the
perimeter of the waste disposal area. When the concentration of any substance equals or
exceeds the maximum allowable concentration of that substance at the REVIEW
BOUNDARY, as determined by monitoring, the permittee shall either (i) demonstrate,
through predictive calculations or modeling, that natural site conditions, facility design and
operational controls will prevent a violation of standards at the Compliance Boundary; or,
(ii) submit a plan for the alteration of existing site conditions, facility design or operational
controls that will prevent a violation of standards at the Compliance Boundary, and
implement that plan upon its approval by the Director.
V. INSPEC, IONS
1. 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 keep an inspection log or summary including at least 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 upon
request to the Division of Environmental Management or other permitting authority.
3. Any duly authorized officer, employee, or representative of the Division of Environmental
Management may, upon presentation of credentials, enter and inspect any property,
premises or place on or related to the disposal site and facility at any reasonable time for the
purpose of determining compliance with this permit; may inspect or copy any records that
must be kept under the terms and conditions of this permit; or may obtain samples of
groundwater, surface water, or leachate.
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans, specifications and other supporting data.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
5

3. 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 of Environmental Management 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.
4. The Permittee shall obtain a well construction permit from. the Raleigh Regional Office prior
to construction of the recovery wells.
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 limitations contained in this permit may subject the
Permittee to an enforcement action by the Division of Environmental Management 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 15 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 limitations as it may deem appropriate.
Permit issued this the 16th day of July, 1993
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
0 1 L-0 - qYK cx'�2�" Ael
A. Prestonoward, Jr., P E., Director
Division of nvironmental Management
By Authority of the Environmental Management Commission
Permit No. WQ0007317
2

Permit No. WQ0007317
July 16, 1993
Engineer's Certification
1, , 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
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 the approved plans and specifications.
Signature
Date
Registration N

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