WQ0023213_Final Permit_20070921

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Michael F. Easley, Governor
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William G. Ross Jr., Secretary
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North Carolina Department of Enviranment and Natural Resources
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Coleen H. Sullins, Director
Division of Water Quality
September 21, 2007
Roger Spach, Water Resources Superintendent
City of Lexington Water Resources Department
28 W. Center Street
Lexington, North Carolina 28292
Subject: Permit No. WQ0023213
Correction and Revision
Lexington Golf Course
Wastewater Treatment and Reclaimed Water
Utilization System
Davidson County
Dear Mr. Spach:
In accordance with your written request received on February 8, 2007 and subsequent request for
modification received on September 20, 2007, we are forwarding herewith a corrected and modified
Permit No. WQ0023213, dated September 21, 2005, for the subject facility.
The following corrections and modifications have been made:
The descriptive portion of the permit has been amended to allow the City to utilize the
reclaimed water for land application to areas owned by the City intended to be accessible to
the public. Uses may also include vehicle washing, soil compaction for construction purposes,
and street sweeping (not street washing).
2. Anew condition (Permit Condition 1.9) has been added that lists the criteria that must be met to use
the reclaimed water for irrigation outside of the Lexington Golf Course.
3. The Annual Loading Rate to Irrigation Zone 4 under Permit Condition 11.7 has been increased from
3.82 inches per year to 23.82 inches per year. The original value was an incorrect number that was
furnished by the permit application.
Please replace the existing permit, issued on August 25, 2005, with this corrected and modified
permit, dated September 21, 2007.
If you have any questions regarding this request, please do not hesitate to contact David Goodrich at (919)
715-6162. Thank you for your cooperation.
Sincerely,
/ q"7
t
for Col �HSullins
cc: Davidson County Health Department
Winston-Salem Regional Office, Aquifer Protection Section
Greg Wells, P.E. — Willis Engineering
Technical Assistance and Certification Unit
APS Central Files
LAU Files
14%Carolina
Aquifer Protection Section 1636 Mail Service Center Raleigh, NC 27699-1636 Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 2728 Capital Boulevard Raleigh, NC 27604 FAX [phone]
An Equal 0pportunitylAffirmative Argon Employer— 50°% Recycledl10% Post Consumer Paper

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
WASTEWATER TREATMENT AND RECLAIMED WATER UTILIZATION 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
City of Lexington
Davidson County
FOR THE
construction and operation of a 300,000 GPD reclaimed water scalping treatment facility and reclaimed
water utilization system consisting of an interceptor vault diverting flow to an influent pump station with
dual 208 gallon per minute (GPM) pumps, a communitor, a 300,000 gallon fine bubble aeration basin
with two (2) 1,100 cubic feet per minute (CFM) centrifugal blowers, one (1) 58,130 gallon clarifier with a
312 GPM return/waste sludge pump, one (1) tertiary disc filter, a 1,038 gallon chlorine contact basin, an
effluent flow measuring device, an effluent composite sampler, a turbidimeter, and a 500,000 gallon
storage tank; and the
construction and operation of a reclaimed water utilization system consisting of dual 1,100 GPM pumps
operating at 312 TDH, approximately 88 acres of spray irrigation area with 891 sprinkler heads and all
associated piping, valves, controls, and appurtenances to serve the Lexington Golf Course with no
discharge of wastes to the surface waters, pursuant to the application received July 5, 2005and 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. In addition, under the conditions of this permit,
the City may utilize the reclaimed water for land application to areas owned by the City intended to be
accessible to the public. Uses may also include vehicle washing, soil compaction for construction
purposes, and street sweeping (not street washing).
This permit shall be effective from the date of issuance until March 31, 2009, shall void Permit No.
WQ0023213 issued August 25, 2005, and shall be subject to the following specified conditions and
limitations:
I. PERFORMANCE STANDARDS
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, the approved plans and specifications, and other
supporting materials. If this project is to be com leted in hales and partially certifiedyou shall
retain the reMonsibility to track further construction approved under the same permit, and shall
provide a final certificate of cam letion once the entire project has been c2mp leted. Mail the
Certification to the Land Application Unit, 1636 Mail Service Center, Raleigh, NC 27699-1636.

2. The Winston-Salem Regional Office, telephone number [phone], shall be notified at least
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.
The reclaimed water utilization facilities shall be effectively maintained and operated at all times
so that there is no discharge to the surface waters, nor any contamination of ground waters, which
will render them unsatisfactory for normal use. In the event that the facilities fail to perform
satisfactorily, including the creation of nuisance conditions or failure of the irrigation area to
adequately assimilate the wastewater, the Perm.ittee shall take immediate corrective actions
including those actions that may be required by the Division of Water Quality, such as the
construction of additional or replacement wastewater treatment and disposal facilities.
4. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to
surface water or ground water resulting from the operation of this facility.
The 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.
6. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited.
7. The following buffers shall be maintained:
a. 100 feet between wetted areas and water supply wells,
b. 100 feet between wetted areas and waters classified as SA,
c. 25 feet between wetted areas and surface waters not classified as SA,
d. 100 feet between wastewater treatment units and wells,
e. 50 feet between reclaimed water storage/irrigation ponds and property lines, and
f. 50 feet between wastewater treatment units and property lines.
Public access to the irrigation sites shall be controlled during active site use. Such controls may
include the posting of signs showing the activities being conducted at each site. A sign shall be
posted in plain sight in the clubhouse showing these activities.
9. For Use of the reclaimed water for irrigation outside of the Lexington Golf Course the following
criteria must be met:
Notification shall be provided to inform the public and City employees of the use of
reclaimed water and that the reclaimed water is not intended for drinking.
b. The City shall develop and maintain a program of record keeping for the distribution of
reclaimed water.
Land application of the reclaimed water must be on property owned by the City.
d. - Use of reclaimed water for vehicle washing shall be conducted in a manner to ensure
minimal surface runoff and the City shall provide educational information to the users on
the proper use of the reclaimed water.
e. The City shall develop and maintain an education program for the proper use of
reclaimed water for each type of use to be utilized by the City.
f. The City shall develop and maintain a program of routine review and inspection of
reclaimed water users.

10. The following shall be requirements for the reclaimed water distribution, storage, and utilization
facilities:
a. All reclaimed water valves, storage facilities, and outlets shall be tagged or labeled to warn
the public or employees that the water is not intended for drinking. Where appropriate, such
warning shall inform the public or employees to avoid contact with the water.
b. All reclaimed water piping, valves, outlets, and other appurtenances shall be color -coded,
taped, or otherwise marked to identify the source of the water as being reclaimed water,
i. All reclaimed water piping and appurtenances shall be either colored purple (i.e., Pantone
522) and embossed or integrally stamped or marked "CAUTION: RECLAIMED
WATER — DO NOT DRINK" or be installed with a purple (i.e., Pantone 522)
identification tape or polyethylene vinyl wrap. The warning shall be stamped on opposite
sides of the pipe and repeated every three feet or less.
ii. Identification tape shall be at least three inches wide and have white or black lettering on
purple (i.e., Pantone 522) field stating "CAUTION: RECLAIMED WATER — DO NOT
DRINK." Identification tape shall be installed- on top of reclaimed water pipelines,
fastened at least every 10 feet to each pipe length and run continuously the entire length
of the pipe.
c. All reclaimed water valves and outlets shall be of a type, or secured in a manner, that permits
operation by authorized personnel only.
d. Above -ground hose bibs (i.e., spigots or other hand -operated connections) shall not be
present. Hose bibs shall be located in locked below -grade vaults that shall be clearly labeled
as being of non -potable quality. As an alternative to the use of Iocked below -grade vaults
with standard hose bibs services, hose bibs, which can only be operated by a special tool or
connected to a special hose connection, may be placed in non -lockable underground services
boxes clearly labeled as non -potable water.
II. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times
2. Upon classification of the wastewater treatment and 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 15A 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.
3. A suitable, year-round vegetative cover shall be maintained on the irrigation areas.
4. Irrigation shall not be performed during inclement weather or when the ground is in a condition
that will cause runoff.
5. Adequate measures shall be taken to prevent wastewater runoff from the irrigation field.
6. 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. The following loading rates shall not be exceeded:
Irrigation
Area
Annual Loading Rate
Instantaneous
Zone
(acres)
Predominate Soil
(in/yr)
Loading Rate
(in/hr
1
19.44
Cecil / Enon
16.41
0.20
2
9.17
Cecil / Enon
52.2
0.10

3
7.24
Cecil / Chewacia
27.99
0.50
4
19.76
Cecil / Pacolet
23.82
0.15
5
6.34
Cecil
10.80
0.10
6
10.89
Cecil / Pacolet
40.77
0.25
7
5.38
Cecil / Enon
34.43
0.10
8
9.71
Cecil
26.13
0.15
8. No type of wastewater other than that from City of Lexington reclaimed water scalping facility
shall be irrigated onto the irrigation area.
9. Upon construction, the Permittee shall submit as-builts of the irrigation system demonstrating that
the spray heads are in compliance with wetland buffers [Regulation 15A NCAC 2H
.0219(k)(1)(C)(i)(N)]. Please submit the information to:
Winston-Salem Regional Office
Water Quality Section
Attention: Sherri Knight
585 Waughton Street
Winston-Salem, North Carolina 27107
10. Freeboard in the effluent storage tank shall not be less than two (2) feet at any time.
11. A waste -level gauge, to monitor waste levels in the storage tank, shall be installed prior to
operation of the scalping facility. This gauge shall have readily visible permanent markings
indicating the maximum liquid level at the top of the temporary liquid storage volume, minimum
liquid level at the bottom of the temporary liquid storage volume, and top of the tank elevations.
Caution must be taken not to damage the integrity of the tank when installing the gauge.
12. All wastewater exceeding the limit for fecal coliform (daily maximum concentration of 25 per
100 ml) or turbidity (instantaneous maximum of 10 NTU) shall be routed to the outfall for
treatment at the City of Lexington WWTF (NC0055786).
111. MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring (including groundwater, surface water, soil or plant tissue analyses) 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. Influent flow shall be continuously monitored and daily flow values shall be reported on Form
NDMR.
The Permittee shall install an appropriate flow measurement device consistent with approved
engineering and scientific practices to ensure the accuracy and reliability of influent flow
measurement. Flow measurement devices selected shall be capable of measuring flows with a
maximum deviation of less than 10 percent from true flow, accurately calibrated at a minimum of
once per year, and maintained to ensure that the accuracy of the measurements is consistent with
the accepted capability of that type of device. The Permittee shall keep records of flow
measurement device calibration on file for a period of at least three years. At a minimum, data to
be included in this documentation shall be;
a. Date of flow measurement device calibration
b. Name of person performing calibration
c. Percent from true flow

3. As an indicator of proper operation and maintenance, the facility shall produce an effluent in
compliance with the following limitations:
Parameter
Monthly Averagea
Daily (Instantaneous) Maximum
Flow
300,000 GPD
BOD5 (5-day, 20°C)
10 mg/l
15 mg/l
NH3 as N
4 mg/1
6 mg/l
TSS
5 mg/l
10 mg/l
Fecal Coliforrn
14 per 100 ml b
25 per 100 ml
Turbidity
10 NTU
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
a
b
Monthly averages for all but fecal coliform shall be the arithmetic mean of all samples
collected during the reporting period.
Monthly average for fecal coliform shall be the geometric mean of all samples collected
during the reporting period.
c
Daily maximum shall be the maximum value of all samples collected during the reporting
period.
The Permittee shall monitor the effluent from the subject facilities at a point prior to irrigation for
the following parameters:
Parameter
Sampling Point
Sampling Frequency
Type of Sample
Flow
Influent or Effluent
Continuous
Recording
Turbidity
Effluent
Continuous
Recording
BOD5 (5-day, 20°C)
Effluent
*2/Month
Composite
NH3 as N
Effluent
*2/Month
Composite
TSS
Effluent
*2/Month
Composite
Fecal Coliform
Effluent
*2/Month
Grab
Settleable Matter
Effluent
Daily
Grab
Residual Chlorine
Effluent
Daily
Grab
NO3
Effluent
**Triannually
Grab
TDS
Effluent
Triannually
Grab
TOC
Effluent
Triannually
Grab
Chloride
Effluent
*'Triannually
Grab
PH
Effluent
**Triannually
Grab
* 2/Month sampling frequency only during the months of April through October. During the
remainder of the year, these parameters shall be monitored monthly.
** Triannually sampling shall be conducted during March, July and November.
If Groundwater sampling indicates or predicts problems with the compliance with Groundwater
Standards, this permit will be modified to include additional and/or more restrictive limitations.
F1

4. The Permittee shall maintain adequate records tracking the amount of wastewater disposed.
These records shall include, but are not necessarily limited to the following information:
a. Date and time of irrigation,
b. Volume of wastewater irrigated,
c. Zone irrigated,
d. Length of time zone is irrigated,
e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each zone,
f. Weather conditions, and
g. Maintenance of cover crops.
5. Freeboard in the storage tank shall be recorded weekly.
6. Three (3) copies of all monitoring data [as specified in Conditions 11I(2) and I11(3)] on Form
NDMR-1 and three (3) copies of all operation and disposal records [as specified in Conditions
111(4) and III(5)] on Form NDAR-1 shall be submitted monthly on or before the last day of the
following month. All information shall be submitted to the following address:
NC Division of Water Quality
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
7. A record shall be maintained of all residuals removed from this facility. This record shall include
the name of the hauler, permit authorizing the disposal or a letter from a municipality agreeing to
accept the residuals, date the residuals were hauled, and volume of residuals removed.
8. A maintenance log shall be maintained at this facility including but not limited to the following
items:
a. Daily sampling results of dissolved oxygen in the aeration basin and at the clarifier weir.
b. Visual observations of the plant and plant site.
c. Record of preventative maintenance (changing of filters, adjusting belt tensions, alarm
testing, diffuser inspections and cleanings, etc.).
d. Date of calibration of flow measurement device.
e. Date and results of power interruption testing on alternate power supply.
9. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem Regional Office, telephone number
[phone], 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 sludge digester; 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.
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 has gone out of
compliance with its 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, Vertical Separation Requirements:
Industrial waste shall not be applied or discharged onto or below the land surface when the
vertical separation between the waste and the seasonal high water table is less than three (3) feet,
unless the perrnittee has demonstrated to the Director or his delegate, by using predictive
calculations or modeling methods acceptable to the Director or his delegate, that such placement
will not result in the contravention of classified groundwater standards.
2. Applicable Boundaries:
The COMPLIANCE BOUNDARY and REVIEW BOUNDARY for the waste disposal area(s) is
specified by regulations in 15A NCAC 211, Waste Not Discharged to Surface Waters, specifically
.0219(k)(1)(C)(i)(III). The Compliance Boundary and the Review Boundary for groundwater
shall be established at the property boundary. An exceedance of Groundwater Quality Standards
at or beyond the Compliance Boundary is subject to remediation action according to 15A NCAC
2L .0106(d)(2).
V. INSPECTIONS
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 wastewater treatment and disposal 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 or other permitting
authority.
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
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.

2. This permit is effective only with respect to the nature and volume of wastes described in the
application and other supporting data.
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.
4. Failure to abide by the conditions and limitations 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.
The issuance of this permit does not exempt 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, including but not limited to applicable river
buffer rules in 15A NCAC 2B.0200, erosion and sedimentation control requirements in 15A
NCAC Chapter 4 and under the Division's General Permit NCG010000, and any requirements
pertaining to wetlands under 15A NCAC 2B .0200 and 2H .0500.
6. The Permittee shall retain a set of approved plans and specifications for the subject facility for the
life of the project.
7. The Permittee shall pay the annual administering and compliance fee within thirty days of 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 211,0205 (c)(4).
8. 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 21" day of September, 2007
NORTH CAROLINA ENVIPONMENTAL MANAGEMENT COMMISSION
or Cole H. Sullins, Director
Divisi of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0023213