WQ0016165_Final Permit_20080829

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
August 29, 2008
Roger Spach, Water Resources Superintendent
City of Lexington
28 West Center Street
Lexington, North Carolina 27292
Subject: Permit No. WQ0016165
City of Lexington Conjunctive -Use
Wastewater Surface Irrigation
Davidson County
Dear Mr. Spach:
In accordance with your permit renewal request received June 13, 2008, we are forwarding
herewith Permit No. WQ0016165, dated August 29, 2008, to the City of Lexington for the continued
operation of the subject wastewater treatment and surface irrigation facilities.
This permit shall be effective from the date of issuance until July 31, 2013, shall void Permit No.
WQ0016165 issued January 14, 2004, 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.
♦ Condition III.& all waste application equipment must be tested and calibrated at least once
per permit cycle. Records of the calibration must be maintained for five years.
♦ Condition TVA,, the effluent from the subject facilities shall be monitored by the Permittee at
the frequency(ies) and location(s) for the parameter(s) specified in Attachment A.
♦ Condition IV.& 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.
♦ Condition IV.7., regarding maintenance log requirements.
If any parts, requirements, or limitations 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.
N'ortl-iCarolina
Naturally
Aquifer Protection Section 1636 Mail Service Center Raleigh, NC 27699-1636 Telephone : [phone]
Internet: WWW ncwatMualitv.ortr Location: 2728 Capital Boulevard Raleigh, NC 27604 Fax 1: [phone]
Fax 2: [phone]
An Fqual Opportunity/Affirmative Action Employer— 50% RecycledA 0% Post Consumer Paper Customer Service: [phone]

If you need additional information concerning this matter, please contact Chonticha McDaniel at
[phone] or [e-mail].
Sincerely,
.. j - d(2�
for Coleen H. Sullins
cc: Davidson County Health Department
Winston-Salem Regional Office; Aquifer Protection Section
Technical Assistance and Certification Unit
APS Central Files
LAU Files

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
SURFACE IRRIGATION SYSTEM 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
continued operation of a 9,000 gallon per day (GPD) surface irrigation treatment and disposal facility
consisting of a 3.84-acre spray irrigation area, forty (40) sprinkler heads with a maximum 57 foot cast,
and all associated piping, valves, and appurtenances to serve the City of Lexington Conjunctive -Use
Wastewater Spray irrigation site, with no discharge of wastes to the surface waters, pursuant to the
application received June 13, 2008, and subsequent additional information received by the Division of
Water Quality (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.
This permit shall be effective from the date of issuance until July 31, 2013, shall void Permit No.
WQ0016165 issued January 14, 2004, and shall be subject to the following specified conditions and
limitations:
I. SCHEDULES
No later than six (6) months prior to the expiration of this permit, the Permittee shall request renewal
of this permit on official Division form(s). Upon receipt of the request, the Division will review the
adequacy of the facilities described therein, and if warranted, will renew the permit for such period of
time and under such conditions and limitations as it may deem appropriate. Please note that Rule
15A NCAC 02T .0105(d) requires an updated site znap to be submitted with the permit renewal
application.
It. PERFORMANCE STANDARDS
The surface irrigation facilities shall be effectively maintained and operated at all times so that there
is no discharge to the surface waters, nor any contravention of groundwater or surface water
standards. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions due to improper operation and maintenance, or failure of the irrigation area to
adequately assimilate the wastewater, the Permittee shall take immediate corrective actions including
those actions that may be required by the Division, such as the construction of additional or
replacement wastewater treatment and disposal facilities.
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2. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to ground
or surface waters resulting from the operation of this facility.
3. All wells that are constructed for purposes of groundwater monitoring shall be constructed in
accordance with 15A NCAC 02C .0109 (Standards of Construction for Wells Other than Water
Supply) and any other state and local laws and regulations pertaining to well construction.
4. Effluent limitations shall not exceed those specified in Attachment A.
5. Application rate(s), whether hydraulic, nutrient, or other pollutant shall not exceed those specified in
Attachment B .
6. The compliance boundary for the disposal system is specified by rules in 15A NCAC 02L,
Groundwater Classifications and Standards. This disposal system was individually permitted on or
after December 30, 1983; therefore, the compliance boundary is established at either 250 feet from
the waste disposal area, or 50 feet within the property boundary, whichever is closest to the waste
disposal area. An exceedance of groundwater standards at or beyond the compliance boundary is
subject to remediation action according to 15A NCAC 02L .0106(d)(2) as well as enforcement
actions in accordance with North Carolina General Statute 143-215.6A through 143-215.6C.
7. The Permittee shall apply for a permit modification prior to any sale or transfer of property that
affects a compliance boundary to establish a new compliance boundary.
8. 1n accordance with 15A NCAC 02L .0107(d), no wells, other than monitoring wells, shall be
constructed within the compliance boundary except as provided by 15A NCAC 02L .0107(g).
9. The review boundary is established around the disposal systems midway between the compliance
boundary and the perimeter of the waste disposal area. Any exceedance of standards at the review
boundary shall require action in accordance with 15A NCAC 02L .0106.
10. The facilities permitted herein must be constructed according to the following setbacks:
a. The setbacks for Irrigation sites shall be as follows (all distances in feet):
i. Any habitable residence or place of public assembly under separate 400
ownership:
ii. Surface waters and drainage ways: 100
iii. Any well with exception of monitoring wells: 100
iv. Any property line: 150
v. Public right of way: 50
b. The setbacks for Treatment and storage units shall be as follows (all distances in feet):
i. Any well with exception of monitoring wells: 100
ii. Any property line: 50
III. OPERATION AND MAINTENANCE REQUIREMENTS
1, The facilities shall be properly maintained and operated at all times. 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. The Permittee shall maintain an Operation and
Maintenance Plan pursuant to 15A NCAC 02T .0507 including operational functions, maintenance
schedules, safety measures, and a spill response plan.
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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 08G .0200. The ORC shall visit
the facilities in accordance with 15A NCAC 08G .0200 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 such that crop health is optimized, allows
for even distribution of effluent, and allows inspection of the irrigation system.
4. Adequate measures shall be taken to prevent wastewater ponding or runoff from the irrigation field.
5. Irrigation shall not be performed during inclement weather or when the ground is in a condition that
will cause ponding or runoff.
6. All waste application equipment must be tested and calibrated at least once per permit cycle. Records
of the calibration must be maintained for five years.
7. No type of wastewater other than that from the City of Lexington's wastewater treatment plant
(NC0055786) shall be irrigated onto the irrigation area.
8. No traffic or equipment shall be allowed on the disposal area except while installation occurs or while
normal maintenance is being performed.
9. Public access to the land application sites shall be controlled during active site use. Such controls
may include the posting of signs showing the activities being conducted at each site.
10. The residuals generated from these treatment facilities must be disposed 1 utilized in accordance with
15A NCAC 02T .1100. The Permittee shall maintain a residual management plan pursuant to 15A
NCAC 02T .0508.
11. Diversion or bypassing of the untreated wastewater from the treatment facilities is prohibited.
IV. MONITORING AND REPORTING REQUIREMENTS
Any monitoring (including groundwater, surface water, soil or plant tissue analyses) deemed
necessary by the Division to ensure surface and ground water protection will be established and an
acceptable sampling reporting schedule shall be followed.
2. All laboratory analyses for effluent, ground waters, or surface waters shall be made by a laboratory
certified by the Division for the required parameter(s) under 15A NCAC 02H .0800.
3. Flow through the treatment facility shall be continuously monitored and daily average flow values
shall be reported on Form NDMR. Flow may be estimated from water use records provided water
use is metered. Daily average values shall be calculated by dividing monthly flow volume by the
number of days in the month.
4. The effluent from the subject facilities shall be monitored by the Permittee at the frequency(ies) and
location(s) for the parameter(s) specified in Attachment A.
5. The Permittee tracking the amount of wastewater disposed shall maintain adequate records. These
records shall include, but are not necessarily limited to, the following information:
a. Date of irrigation,
b. Volume of wastewater irrigated,
c. Field irrigated,
d. Length of time field is irrigated,
WQ0016165 Version 3.0 Shell Version 080229 Page 3 of 6

e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings for each field,
f. Continuous monthly and year-to-date loadings for any non -hydraulic parameter specifically
limited in Attachment B for each field,
g. Weather conditions, and
h. Maintenance of cover crops.
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.
7. A maintenance log shall be maintained at this facility including but not limited to the following items:
a. Visual observations of the plant and plant site. A.
b. Record of preventative maintenance (changing of filters, adjusting belt tensions, alarm testing,
diffuser inspections and cleanings, etc.).
c. Date of calibration of flow measurement device.
d. Date and results of power interruption testing on alternate power supply.
8. Three (3) copies of all monitoring data [as specified in Conditions W. 3. and W. 4,] on Form NDMR
for each PPI and three (3) copies of all operation and disposal. records [as specified in Conditions IV.
51 on Form NDAR-1 for every field shall be submitted on or before the last day of the following
month. If no activities occurred during the monitoring month, monitoring reports are still required
documenting the absence of the activity. All information shall be submitted to the following address:
Division of Water Quality
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
9. An annual representative soils analysis (Standard Soil Fertility Analysis) shall be conducted on each
irrigation field and the results maintained on file by the Permittee for a minimum of five years. The
Standard Soil Fertility Analysis shall include, but is not necessarily limited to, the following
parameters:
Acidity
Manganese
Potassium
Calcium
Percent Humic Matter
Sodium
Copper
pH
Zinc
Magnesium
Base Saturation (by calculation).Phosphorus
Cation Exchange Capacity
Exchangeable Sodium Percentage
10. 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 including ponding in the irrigation field or runoff
from the irrigation fields.
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 disposal system resulting in a by-pass directly to receiving waters.
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d. Any time that self -monitoring information indicates that the facility has gone out of compliance
with its permit limitations including, but not limited to, freeboard measurements, effluent
limitations, exceedances of groundwater standards, or overloading of any field.
For any emergency that requires immediate reporting (e.g., discharges to surface waters, imminent
failure of a storage structure, etc.) outside normal business hours must be reported to the Division's
Emergency Response personnel at telephone number [phone], [phone], or (919) 733-
3300. 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.
V. INSPECTIONS
1. Adequate inspection and maintenance shall be provided by the Permittee to ensure 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 five 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
1. 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.
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. No variances to applicable rules governing the construction
and 1 or operation of the permitted facilities are granted unless specifically requested and granted in
this permit.
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) that have jurisdiction. Of particular concern to the Division are applicable river buffer
rules in 15A NCAC 02B .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 02B .0200 and 02H .0500.
WQ0016165 Version 3.0 Shell Version 080229 Page 5 of

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 on official Division form(s),
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. The
Permittee of record shall remain fully responsible for compliance until a permit is issued to the new
owner.
6. The Permittee shall retain a set of approved plans and specifications for the life of the facilities
permitted herein.
7. The Permittee shall maintain this permit until all permitted facilities herein are properly closed or
permitted under another permit issued by the appropriate permitting authority.
8. The Permittee must pay the annual fee 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
pursuant to 15A NCAC 02T .0105(e).
Permit issued this the 29"' of August, 2008
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
oicen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0016165
WQ0016165 Version 3.0 Shell Version 080229 Page 6 of 6

ATTACHMENT A - LIMITATIONS AND MONITORING REQUIREMENTS
PPI 001— WWTF Influent
Permit Number: WQ0016165 Version, 3,0
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Parameter Description - PCS Code
Monthly Average
Weekly Average
Daily Maximum
Measurement
Frequency
Sample
'Type
Flow, in conduit or thru treatment plant - 50050
6,500,000
GPD
Continuous
Recorder
PPI 002 — WWTF Effluent
EFFLUENT CHARACTERISTICS
EFFLUENT .LIMITS
MONITORING REQUIREMENTS
Parameter Description - PCS Code
Monthly Average
Weekly Average
Daily Maximum
Measurement
Frequency a
Sample
Type
Coliform, Fecal MF, M-FC Broth,44.5C - 31616
3 X year
Grab
BOD, 5-Day (20 Deg. C) - 00310
3 X year I
Grab
Solids, Total Suspended - 00530
3 X year
Grab
Nitrogen, Ammonia Total (as N) - 00610
3 X year
Grab
Nitrogen, Nitrate Total (as N) - 00620
3 X year
Grab
Nitrogen, Kjeldahl, Total (as N) - 00625
3 X year
Grab
Chlorine, Total Residual - 50060
Weekly
Grab
Flow, in conduit or thru treatment plant - 50050 b
9,000
GPD
Monthly
Estimate
a 3 X year monitoring shall be conducted in March, July & November.
Flow to Spray fields.
WQ0016165 Version 3.0 Attachment A Pagel of 2

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WQ00161u lersion 3.0 Attachment A ;e 2 oil

ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS
City of Lexington — Pilot Spray Irrigation
Permit Number: WQ0016165 Version: 3.0
UTILIZATION AREA INFORMATION
APPLICATION LIMITATIONS
Field/
Basin
Owner
County
Latitude
Longitude
Net Acreage
Dominant
Soil Series
Parameter
Hourly
Loading
Yearly
Loading
Units
01
City of Lexington
Davidson
35046'06"
80°14114"
3.84
CeB2
01284 - Application Surface Irrigation
0.3
30
inches
Total
3.84
WQ0016165 Version 3.0 Attachment B Page] oft

THIS PAGE BLANK
WQ0016 1 L, Version 3.0 Attachment B age 2 of 2

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City of Lexington
Conjunctive Use Spray irrigation Site
by tec 11 /03 from iexine3 doqq
200 0 200 400 Feet
N
WQ00016165/GW03133
2000 0 2000 4000 Feet