NC0055786_Application_20181108

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ROY COOPER NORTH CAROLINA
Governor Environmental Quality
NIICHAEL S- REGAN
secretwy
LINDA CULPEPPER
Interim Director
November 08, 2018
Tom Johnson, Water Resources Dir.
City of Lexington
28 W Center St
Lexington, NC 27292-3099
Subject: Permit Renewal
Application No. NCOOSS786
Lexington Regional WWTP
Davidson County
Dear Applicant:
The Water Quality Permitting Section acknowledges the November 8, 2018 receipt of your permit renewal application
and supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW
permitting branch. Per G.S. 150E-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
https://deg. nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
Wren Thed rd
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-807-6300

® �1
LEXINGTON
NORTH CAROL 1 N A
WATER RESOURCES
Q h A L I T F F I R S T
October 29, 2018
NCDENR/DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: NPDES Permit — NCO055786
Lexington Regional WWTP
Davidson County
Application for Permit Renewal
Dear Sir/Madam:
RECEIVEDI@ENpjDWR
to 0 8 Z919
Water Resource Section
perm►ttin9
By this letter and attachments, I am requesting renewal of the NPDES permit for the City of Lexington's
Regional WWTP — NC0055786.
At the time of this application for renewal, The City of Lexington WWTP has completed only one of the
required four multiple species toxicity tests. The City has another multiple species toxicity test
scheduled for 4t1 quarter of 2018 and 1st quarter 2019. The City of Lexington WWTP has consistently
passed quarterly toxicity testing for the past four years. It is our hope that this history will be taken into
consideration.
Attached are the following: EPA Form 2A — Original plus 2 copies with attachments
Sludge Management Plan: The City disposes of the sludge generated at this facility through its Compost
Facility — WQ0001318.
Please forward comments and questions to my attention at 336-248-3930 ext. 3926 or to
[e-mail]
Sincerely,
r"
Water Resources - Public Works - Engineering
28 West Center Street- Lexington, NC 27292 - 336.248-3930
WA A.I,i N1NG'rONNC.c()v

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED
Lexington Regional WWTP, NCO055786 renewal
FORM
2A NPDES FORM 2A APPLICATION OVERVIEW
NPDES
APPLICATION OVERVIEW
RIVER BASIN:
Yadkin Pee -Dee
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet
and a "Supplemental Application Information" packet. The Basic Application Information packet is divided
into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or
equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental
Application Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPLICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.8. A treatment works
that discharges effluent to surface waters of the United States must also answer questions A.9 through A.12.
B. Additional Application Information for Applicants with a Design Flow >_ 0.1 mgd. All treatment works that have design flows
greater than or equal to 0.1 million gallons per day must complete questions B.1 through B.6.
C. Certification. All applicants must complete Part C (Certification).
SUPPLEMENTAL APPLICATION INFORMATION:
D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets
one or more of the following criteria must complete Part D (Expanded Effluent Testing Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to provide the information.
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E (Toxicity Testing
Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to submit results of toxicity testing.
F. Industrial User Discharges and RCRAICERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users (SIUs) or receives RCRA or CERCLA wastes must complete Part F (Industrial User Discharges
and RCRA/CERCLA Wastes). SIUs are defined as:
1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations (CFR) 403.6 and
40 CFR Chapter I, Subchapter N (see instructions); and
2. Any other industrial user that:
a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works (with certain
exclusions); or
b. Contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant; or
C. Is designated as an SIU by the control authority.
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer
Systems).
ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 1 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
BASIC APPLICATION INFORMATION
PART A. BASIC APPLICATION INFORMATION FOR ALL APPLICANTS:
All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet.
A.I. Facility Information.
Facility Name Lexington Regional Wastewater Treatment Plant
Mailing Address City of Lexington
28 West Center Street. Lexington, NC 27292
Contact Person Tom Johnson
Title Water Resources Director
Telephone Number [phone] ext. 3926
Facility Address 500 Glendale Road, Lexington, NC 27292
(not P.O. Box)
A.2. Applicant Information. If the applicant is different from the above, provide the following:
Applicant Name
Mailing Address
Contact Person _
Title
Telephone Number ( )
Is the applicant the owner or operator (or both) of the treatment works?
® owner ® operator
Indicate whether correspondence regarding this permit should be directed to the facility or the applicant.
❑ facility ® applicant
A.3. Existing Environmental Permits. Provide the permit number of any existing environmental permits that have been issued to the treatment works
(include state -issued permits).
NPDES NCO055786 PSD
UIC Other W00001318wQ0023213:WQ0016165
RCRA Other NCG110093
A.4. Collection System Information. Provide information on municipalities and areas served by the facility. Provide the name and population of each
entity and, if known, provide information on the type of collection system (combined vs. separate) and its ownership (municipal, private, etc.).
Name Population Served Type of Collection System Ownership
NCO055786 + G:Oi)0 Separate Municipal
Total population served 30.ouu
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 2 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
• Lexington Regional WWTP, NCO055786 renewal Yadkin Pee -Dee
A.5. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes ® No
b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows
through) Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant (i.e., the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 12t" month of "this year" occurring no more than three months prior to this application submittal.
a. Design flow rate 6.5 mgd
Two Years Ago Last Year This Year
b. Annual average daily flow rate 3.0 2.5 2.7
C. Maximum daily flow rate 9.2 11.9 11.5
A.7. Collection System. Indicate the type(s) of collection system(s) used by the treatment plant. Check all that apply. Also estimate the percent
contribution (by miles) of each.
® Separate sanitary sewer 100 %
❑ Combined storm and sanitary sewer %
A.8. Discharges and Other Disposal Methods.
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes ❑ No
If yes, list how many of each of the following types of discharge points the treatment works uses:
i. Discharges of treated effluent
ii. Discharges of untreated or partially treated effluent
iii. Combined sewer overflow points
iv. Constructed emergency overflows (prior to the headworks)
V. Other
b. Does the treatment works discharge effluent to basins, ponds, or other surface impoundments
that do not have outlets for discharge to waters of the U.S.? ❑ Yes
If yes, provide the following for each surface impoundment:
Location:
Annual average daily volume discharge to surface impoundment(s)
Is discharge ❑ continuous or ❑ intermittent?
C. Does the treatment works land -apply treated wastewater?
If yes, provide the following for each land application site:
Location: on site (Permit # W00016165)
Number of acres: 3.88
1
® No
mgd
® Yes ❑ No
Annual average daily volume applied to site: .008 mgd
Is land application ❑ continuous or ® intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works? ® Yes
❑ No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 3 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
If yes, describe the mean(s) by which the wastewater from the treatment works is discharged or transported to the other treatment works
(e.g., tank truck, pipe).
Lexington operates a conjunctive use plant (W00023213) that intercepts wastewater from an outfall leading to the Regional Plant This
water is treated to reuse standards with a package plant and is used to irrigate the Lexington Golf Course.
If transport is by a party other than the applicant, provide:
Transporter Name
Mailing Address _
Contact Person _
Title
Telephone Number
For each treatment works that receives this discharge, provide the following:
Name Lexington Golf Course Coniunctive WWTP and Reclaimed Water Utilization System (WQ0023213)
Mailing Address City of Lexington
28 West Center Street, Lexington NC 27292
Contact Person Tom Johnson
Title Water Resources Director
Telephone Number [phone] ext. 3926
If known, provide the NPDES permit number of the treatment works that receives this discharge N/A
Provide the average daily flow rate from the treatment works into the receiving facility. <0,3 mgd
e. Does the treatment works discharge or dispose of its wastewater in a manner not included
in A.8. through A.8.d above (e.g., underground percolation, well injection): ® Yes ❑ No
If yes, provide the following for each disposal method:
Description of method (including location and size of site(s) if applicable):
Spray irrigation on approximately 87 acre golf course.
Annual daily volume disposed by this method: weather dependent
Is disposal through this method ❑ continuous or ® intermittent?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 4 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Lexington Regional WWTP, NCO055786 renewal Yadkin Pee -Dee
WASTEWATER DISCHARGES:
If you answered "Yes" to question A.8.a, complete questions A.9 through A.12 once for each outfall (including bypass points) through
which effluent is discharged. Do not include information on combined sewer overflows in this section. If you answered "No" to question
A.8.a, go to Part B, "Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall.
a. Outfall number 001
b Location Lexington 27292
(City or town, if applicable) (Zip Code)
(County)
(State)
35P46'06"
80P 14'14"
(Latitude)
(Longitude)
C. Distance from shore (if applicable)
ft.
d. Depth below surface (if applicable)
ft.
e. Average daily flow rate 2_;
mgd
f. Does this outfall have either an intermittent or a periodic discharge? CI Yes
❑ No (go to A.9.g.)
If yes, provide the following information:
Number f times per year discharge occurs:
Average duration of each discharge: -.____
Average flow per discharge: _
mgd
Months in which discharge occurs: _
g. Is outfall equipped with a diffuser? ❑ Yes
® No
A.10. Description of Receiving Waters.
a. Name of receiving water Abbotts Creek
b. Name of watershed (if known)
United States Soil Conservation Service 14-digit watershed code (if known):
C. Name of State Management/River Basin (if known):
United States Geological Survey 8-digit hydrologic cataloging unit code (if known):
d. Critical low flow of receiving stream (if applicable)
acute cfs chronic _
e. Total hardness of receiving stream at critical low flow (if applicable):
cfs
mg/I of CaCO3
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 5 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
A.11. Description of Treatment
a. What level of treatment are provided? Check all that apply.
® Primary ® Secondary
❑ Advanced ❑ Other. Describe.
b. Indicate the following removal rates (as applicable):
Design BOD5 removal or Design CBOD5 removal 98 (influent design = 271 effluent limit 5) %
Design SS removal 82 (influent design = 169 effluent limit 30) %
Design P removal 83 (influent design = 6 effluent limit 1) %
Design N removal n/a %
Other
C. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe:
Sodium Hypochlorite
If disinfection is by chlorination is dechlorination used for this outfall? ® Yes ❑ No
Does the treatment plant have post aeration? ® Yes ❑ No
A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data
collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a
minimum, effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outfall number: 001 (Jan 2016 thru Aug 2018)
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
PARAMETER
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.0
S.U.
pH (Maximum)
8.4
S.U.
Flow Rate
11.9
mg
2.7
ring
973
Temperature (Winter)
22
C
14.1
C
391
Temperature (Summer)
30
C
23.8
C
581
For pH please report a minimum and a maximum daily value
MAXIMUM DAILY
AVERAGE DAILY DISCHARGE
POLLUTANT
DISCHARGE
ANALYTICAL
ML/MDL
Number of
METHOD
Conc.
Units
Conc.
Units
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN
BOD5
16.5
Mg/1
1.06
Mg/1
668
DEMAND (Report one)
CBOD5
FECAL COLIFORM
6000
/100m1
4.12
/100m1
668
TOTAL SUSPENDED SOLIDS (TSS)
16.7
M /I
2.60
Mg/1
668
END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 6 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
BASIC APPLICATION INFORMATION
PART B. ADDITIONAL APPLICATION INFORMATION FOR APPLICANTS WITH A DESIGN FLOW GREATER THAN OR
EQUAL TO 0.1 MGD (100,000 gallons per day).
All applicants with a design flow rate >_ 0.1 mgd must answer questions B.1 through B.6. All others go to Part C (Certification).
B.1. Inflow and Infiltration. Estimate the average number of gallons per day that flow into the treatment works from inflow and/or infiltration
500,000 gpd
Briefly explain any steps underway or planned to minimize inflow and infiltration.
10% of the collection system sewer lines are inspected annually. TV inspection of se
B.2. Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries. This
map must show the outline of the facility and the following information. (You may submit more than one map if one map does not show the entire
area.)
a. The area surrounding the treatment plant, including all unit processes.
b. The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which
treated wastewater is discharged from the treatment plant. Include outfalls from bypass piping, if applicable.
c. Each well where wastewater from the treatment plant is injected underground.
d. Wells, springs, other surface water bodies, and drinking water wells that are: 1) within V4 mile of the property boundaries of the treatment
works, and 2) listed in public record or otherwise known to the applicant.
e. Any areas where the sewage sludge produced by the treatment works is stored, treated, or disposed.
f. If the treatment works receives waste that is classified as hazardous under the Resource Conservation and Recovery Act (RCRA) by truck, rail,
or special pipe, show on the map where the hazardous waste enters the treatment works and where it is treated, stored, and/or disposed.
B.3. Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant, including all bypass piping and all
backup power sources or redunancy in the system. Also provide a water balance showing all treatment units, including disinfection of sewer
linesection (e.g., chlorination and dechlorination). The water balance must show daily average flow rates at influent and discharge points and
approximate daily flow rates between treatment units. Include a brief narrative description of the diagram.
BA. Operation/Maintenance Performed by Contractor(s).
Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works the responsibility of a
contractor? ® Yes ❑ No
If yes, list the name, address, telephone number, and status of each contractor and describe the contractor's responsibilities (attach additional
pages if necessary).
Name: CITI Ilc
Mailing Address: 4030 Yancey Rd
Charlotte NC 28217
Telephone Number: (_704) 969-2484
Responsibilities of Contractor: Maintain and calibrate plant instrumentation.
B.5. Scheduled improvements and Schedules of Implementation. Provide information on any uncompleted implementation schedule or
uncompleted plans for improvements that will affect the wastewater treatment, effluent quality, or design capacity of the treatment works. If the
treatment works has several different implementation schedules or is planning several improvements, submit separate responses to question B.5
for each. (If none, go to question 13.6.)
a. List the outfall number (assigned in question A.9) for each outfall that is covered by this implementation schedule.
n/a
b. Indicate whether the planned improvements or implementation schedule are required by local, State. or Federal agencies.
El Yes L9 No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 7 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
C. If the answer to B.5.b is "Yes," briefly describe, including new maximum daily inflow rate (if applicable).
d. Provide dates imposed by any compliance schedule or any actual dates of completion for the implementation steps listed below, as
applicable. For improvements planned independently of local, State, or Federal agencies, indicate planned or actual completion dates, as
applicable. Indicate dates as accurately as possible.
Schedule Actual Completion
Implementation Stage MM/DD/YYYY MM/DD/YYYY
Begin Construction
End Construction
Begin Discharge
Attain Operational Level
e. Have appropriate permits/clearances concerning other Federal/State requirements been obtained? ❑ Yes ❑ No
Describe briefly:
B.6. EFFLUENT TESTING DATA (GREATER THAN 0.1 MGD ONLY).
Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated
effluent testing required by the permitting authority for each outfall through which effluent is discharged. Do not include information
on combine sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate
QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a minimum effluent testing data must be
based on at least three pollutant scans and must be no more than four and on -half years old.
Outfall Number: 01
MAXIMUM DAILY
AVERAGE DAILY DISCHARGE
DISCHARGE
ANALYTICAL
POLLUTANT
METHOD
MLlMDL
Conc.
Units
Conc.
Units
Number of
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA (as N)
10,02
Mg/I
0.49
Mg/I
668
CHLORINE (TOTAL
94
Ug/i
15.4
Ug/I
668
RESIDUAL, TRC)
DISSOLVED OXYGEN
11.5
Mg/I
8.3
Mg/I
973
TOTAL KJELDAHL
7.84
Mg1I
1.87
Mg/I
32
NITROGEN (TKN)
NITRATE PLUS NITRITE
7 67
Mgll
4.35
Mgll
32
NITROGEN
OIL and GREASE
PHOSPHORUS (Total)
3.1
Mg/I
0 77
Mg/I
138
TOTAL DISSOLVED SOLIDS
(TDS)
OTHER
END OF PART B.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Pare 8 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
, Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to instructions to determine who is an officer for the purposes of this
certification. All applicants must complete all applicable sections of Form 2A, as explained in the Application Overview. Indicate below which
parts of Form 2A you have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed
Form 2A and have completed all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
N Basic Application Information packet Supplemental Application Information packet:
® Part D (Expanded Effluent Testing Data)
® Part E (Toxicity Testing: Biomonitoring Data)
® Part F (Industrial User Discharges and RCRA/CERCLA Wastes)
❑ Part G (Combined Sewer Systems)
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who
manage the system or those persons directly responsible for gathering the information, the information is, to the best of my knowledge and belief, true,
accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations,
Name and official title Tom Johnson Watw Resources director
Signature ~�
Telephone number [phone] ext 3926
to/zt/ Ib
Date signed
Upon request of the permitting authority, you must submit any other information necessary to assure wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
NCDENR/ DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 9 of 22

FACILITY NAME AND PERMIT NUMBER:
Lexington Regional WWTP, NCO055786
PERMIT ACTION REQUESTED:
renewal
RIVER BASIN:
Yadkin Pee -Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has (or is required
to have) a pretreatment program, or is otherwise required by the permitting authority to provide the data, then provide effluent testing data for the following
pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each outfall through which
effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported must be based on data collected
through analyses conducted using 40 CFR Part 136 methods- In addition, these data must comply with QA/QC requirements of 40 CFR Part 136 and
other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the blank rows provided below
any data you may have on pollutants not specifically listed in this form. At a minimum, effluent testing data must be based on at least three pollutant
scans and must be no more than four and one-half years old.
Outfall number: 0 (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
ML/MDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
METALS (TOTAL RECOVERABLE), CYANIDE, PHENOLS, AND HARDNESS.
ANTIMONY
3
Ug/I
<3
Ug/I
EPA200.8
ARSENIC
5
Ug/I
<5
Ug/I
311313-04
BERYLLIUM
I
Ug/I
<1
Ug/I
EPA200 7
CADMIUM
<1
Ug/I
<1
Ug/I
3
311313-04
CHROMIUM
Ug/I
<5
Ug/I
3
EPA200.7
COPPER
<10
Ug/I
<10
Ug/I
?
EPA200-7
LEAD
<5
Ug/I
<5
Ug/I
311313-04
MERCURY
15
Ng/I
<1
Ng/I
EPA1631E
NICKEL
<10
Ug/I
<10
Ug/I
EPA200.7
SELENIUM
<10
Ug/I
<10
Ug/I
3
311313-04
SILVER
<5
Ug/I
<5
Ug/I
EPA200.7
THALLIUM
Ug/I
<1
Ug/I
3
EPA200.8
ZINC
65
Ug/I
49
Ug/I
3
EPA200.7
CYANIDE
< 005
Mg/I
< 005
Mg/I
450OCNE-99
TOTAL PHENOLIC
COMPOUNDS
S
Ug/I
<5
Ug/1
420 1-78
HARDNESS (as CaCO3)
618
Mg/I
64-6
Mg/I
3
2340C-97
Use this space (or a separate sheet) to provide information on other metals requested by the permit writer
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 10 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
Outfall number: 01 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Number
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
VOLATILE ORGANIC COMPOUNDS
ACROLEIN
<100
Ugll
<100
Ugll
3
EPA624
ACRYLONITRILE
<50
Ug/I
<50
Ug/I
3
EPA624
BENZENE
<5
Ug/I
<5
Ugll
3
EPA624
BROMOFORM
<5
Ug/l
<5
Ugh
3
EPA624
CARBON
<5
Ug/I
<5
Ug/i
3
EPA624
TETRACHLORIDE
CHLOROBENZENE
<5
Ugll
<5
Ug/I
3
EPA624
CHLORODIBROMO-
<5
Ug/I
<5
Ugll
3
EPA624
METHANE
CHLOROETHANE
<10
Ugll
<10
Ugll
3
EPA624
2-CHLOROETHYLVINYL
<5
Ugll
<5
Ug/I
3
EPA624
ETHER
CHLOROFORM
8-9
Ugll
<5
Ug/I
3
EPA624
DICHLOROBROMO-
<5
Ugll
<5
Ugll
3
EPA624
METHANE
1.1-DICHLOROETHANE
<5
Ug/I
<5
Ug/I
3
EPA624
1,2-DICHLOROETHANE
<5
Ug/I
<5
Ug/I
3
EPA624
TRANS- I,2-DICHLORO-
<5
Ug11
<5
Ugll
3
EPA624
ETHYLENE
1,1-DICHLORO-
<5
Ugil
<5
Ugll
3
EPA624
ETHYLENE
1,2-DICHLOROPROPANE
<5
Ugli
<5
Ugll
3
EPA624
1,3-DICHLORO-
<5
Ug/I
<5
Ug/I
3
EPA624
PROPYLENE
ETHYLBENZENE
<5
Ugh
<5
Ugll
3
EPA624
METHYL BROMIDE
<5
Ug/I
<5
Ug/I
3
EPA624
METHYL CHLORIDE
<10
Ugll
<10
Ug/l
3
EPA624
METHYLENE CHLORIDE
<10
Ugll
<10
Ugll
3
EPA624
1,1,2,2-TETRA-
<5
Ugll
<5
Ugll
3
EPA624
CHLOROETHANE
TETRACHLORO-
<5
Ugll
<5
Ugll
3
EPA624
ETHYLENE
TOLUENE
<5
Ugh
<5
Ug/I
3
EPA624
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 11 of 22

FACILITY NAME AND PERMIT NUMBER:
Lexington Regional WWTP, NCO055786
PERMIT ACTION REQUESTED:
renewal
RIVER BASIN:
Yadkin Pee -Dee
Outfall number: _ (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
ML/MDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
1,1,1
TRICHLOROETHANE
<5
Ug/I
<5
Ug/I
3
EPA624
1,1,2
TRICHLOROETHANE
<5
Ug/I
<5
Ug/I
3
EPA624
TRICHLOROETHYLENE
<5
Ug/I
<5
Ug/I
3
EPA624
VINYL CHLORIDE
<5
Ug/I
<5
Ug/I
3
EPA624
Use this space (or a separate sheet) to provide information on other volatile organic compounds requested by the permit writer
ACID -EXTRACTABLE COMPOUNDS
P-CHLORO M-CRESOL
<50
g'!
<50
Ug/I
EPA625
2-CHLOROPHENOL
<10
Ugl
<10
Ug/I
3
EPA625
2,4-DICHLOROPHENOL
<10
<10
Ug/I
EPA625
2,4-DIMETHYLPHENOL
<10
y
<10
Ug/I
3
EPA625
4.6-DINITRO-0-CRESOL
<50
ilal
<50
Ug/I
3
EPA625
2A-DINITROPHENOL
<10
Uq
<10
Ug/I
3
EPA625
2-NITROPHENOL
<10
Ug'l
<10
Ug/I
3
EPA625
4-NITROPHENOL
<50
iJg
<50
Ug/I
3
EPA625
PENTACHLOROPHENOL
<50
y
<50
Ug/I
EPA625
PHENOL
<10
Hy!
<10
Ug/I
EPA625
2,4,6-
TRICHLOROPHENOL
<10
tJg!i
<10
Ug i
3
EPA625
Use this space (or a separate sheet) to provide information on other acid -extractable compounds requested by the permit writer
BASE -NEUTRAL COMPOUNDS
ACENAPHTHENE
<10
Ug/I
<10
Ug/I
3
EPA625
ACENAPHTHYLENE
<10
Ug/I
<10
Ug/I
3
EPA625
ANTHRACENE
<10
Ug/I
<10
Ug/I
EPA625
BENZIDINE
<100
Ug/I
<100
Ug/I
3
EPA625
BENZO(A)ANTHRACENE
<10
Ug/I
-10
Ug/I
EPA625
BENZO(A)PYRENE
<10
Ug/I
<10
Ug/I
3
EPA625
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 12 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
, Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
Outfall number: 01 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Number
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
3,4 BENZO-
<10
Ug/I
<10
Ug/I
3
EPA625
FLUORANTHENE
BENZO(GHI)PERYLENE
<10
Ug/I
<10
Ug/I
3
EPA625
BENZO(K)
<10
Ug/I
<10
Ug/1
3
EPA625
FLUORANTHENE
BIS (2-CHLOROETHOXY)
<10
Ug/I
<10
Ug/I
3
EPA625
METHANE
BIS (2-CHLOROETHYL)-
<10
Ug/l
<10
Ugh
3
EPA625
ETHER
BIS (2-CHLOROISO-
<10
Ug/I
<10
Ug/I
3
EPA625
PROPYL)ETHER
BIS (2-ETHYLHEXYL)
<20
Ug/I
<20
Ug/I
3
EPA625
PHTHALATE
4-BROMOPHENYL
<10
Ug/l
<10
Ug/I
3
EPA625
PHENYLETHER
BUTYL BENZYL
<10
Ug/I
<10
Ug/I
3
EPA625
PHTHALATE
2-CHLORO-
<10
Ug/I
<10
Ug/I
3
EPA625
NAPHTHALENE
4-CHLORPHENYL
<10
Ug/I
<10
Ug/I
3
EPA625
PHENYLETHER
CHRYSENE
<10
Ug/I
<10
Ug/I
3
EPA625
DI-N-BUTYL PHTHALATE
<10
Ug/I
<10
Ug/I
3
EPA625
DI-N-OCTYL PHTHALATE
<10
Ug/I
<10
Ug/I
3
EPA625
DIBENZO(A,H)
<10
Ug/I
<10
Ug/I
3
EPA625
ANTHRACENE
1,2-DICHLOROBENZENE
<10
Ug/I
<10
Ug/I
3
EPA625
1,3-DICHLOROBENZENE
<10
Ug/I
<10
Ug/I
3
EPA625
1,4-DICHLOROBENZENE
<10
Ug/I
<10
Ug/I
3
EPA625
3,3-DICHLORO-
<10
Ug/l
<10
Ug/I
3
EPA625
BENZIDINE
DIETHYL PHTHALATE
<10
Ug/I
<10
Ug/I
3
EPA625
DIMETHYL PHTHALATE
<10
Ug/I
<10
Ug/I
3
EPA625
2,4-DINITROTOLUENE
<10
Ug/I
<10
Ug/I
3
EPA625
2,6-DINITROTOLUENE
<10
Ug/I
<10
Ug/I
3
EPA625
1,2-DIPHENYL-
<10
Ug/I
<10
Ug/I
3
EPA625
HYDRAZINE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 13 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
Outfall number: (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Number
Con,.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
FLUORANTHENE
<10
Ug/I
<10
Ug/l
3
EPA625
FLUORENE
<10
Ugll
<10
Ug/I
3
EPA625
HEXACHLOROBENZENE
<10
Ug/I
<10
Ug/I
3
EPA625
HEXACHLORO-
<10
Ug/I
<10
Ug/I
3
EPA625
BUTADIENE
HEXACHLOROCYCLO-
<10
Ug/I
<10
Ug/I
3
EPA625
PENTADIENE
HEXACHLOROETHANE
<10
Ug/I
<10
Ug/I
3
EPA625
INDENO(1,2,3-CD)
<10
Ug/I
<10
Ug/I
3
EPA625
PYRENE
ISOPHORONE
<10
Ug/I
<10
Ug/I
3
EPA625
NAPHTHALENE
<10
Ug/l
<10
Ug/I
3
EPA625
NITROBENZENE
<10
Ug/I
<10
Ug/I
3
EPA625
N-NITROSODI-N-
<10
Ug/I
<10
Ugh
3
EPA625
PROPYLAMINE
N-NITROSODI-
<10
Ugll
<10
Ug/I
3
EPA625
METHYLAMINE
N-NITROSODI-
<10
Ug/I
<10
Ug/I
3
EPA625
PHENYLAMINE
PHENANTHRENE
<10
Ug/I
<10
Ug/I
3
EPA625
PYRENE
<10
Ug/I
<10
Ug/1
3
EPA625
1,2,4-
<10
Ug/I
<10
Ug/I
3
EPA625
TRICHLOROBENZENE
Use this space (or a separate sheet) to provide information on other base -neutral compounds requested by the permit writer
Use this space (or a separate sheet) to provide information on other pollutants (e.g., pesticides) requested by the permit writer
END OF PART D.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 14 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of the
facility's discharge points: 1) POTWs with a design flow rate greater than or equal to 1.0 mgd' 2) POTWs with a pretreatment program (or those that are
required to have one under 40 CFR Part 403): or 3) POTWs required by the permitting authority to submit data for these parameters.
• At a minimum, these results must include quarterly testing for a 12-month period within the past 1 year using multiple species (minimum of two
species), or the results from four tests performed at least annually in the four and one-half years prior to the application, provided the results
show no appreciable toxicity, and testing for acute and/or chronic toxicity, depending on the range of receiving water dilution. Do not include
information on combined sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC
requirements for standard methods for analytes not addressed by 40 CFR Part 136.
• In addition, submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity test
conducted during the past four and one-half years revealed toxicity, provide any information on the cause of the toxicity or any results of a
toxicity reduction evaluation, if one was conducted.
• If you have already submitted any of the information requested in Part E, you need not submit it again. Rather, provide the information
requested in question EA for previously submitted information. If EPA methods were not used, report the reasons for using alternate methods.
If test summaries are available that contain all of the information requested below, they may be submitted in place of Part E.
If no biomonitoring data is required, do not complete Part E. Refer to the Application Overview for directions on which other sections of the form to
complete.
E.1. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years. 18
® chronic ❑ acute information in E.2 is for fat head minnow test only. Copies attached. The City conducted only one of
the four required multi -species tests during the last year.
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test (where each species constitutes a test). Copy this page if more than three tests are being reported.
Test number: '1 Test number: Test number:
a. Test information.
Pimephales
Test Species & test method number
promelas/THP6c
Age at initiation of test
24 hrs
Outfall number
001
(9/24-9/25/18) &
Dates sample collected
(9/27-9/28/18)
Date test started
9/25/18
Duration
9/25-10/2/18
b. Give toxicity test methods followed.
Manual title
Edition number and year of publication
Page number(s)
c. Give the sample collection method(s) used. For multiple grab samples, indicate the number of grab samples used.
24-Hour composite
x
Grab
d. Indicate where the sample was taken in relation to disinfection. (Check all that apply for each.
Before disinfection
7-
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 15 of 22

After disinfection
After dechlorination x
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 16 of 22

FACILITY NAME AND PERMIT NUMBER:
Lexington Regional WWTP, NCO055786
PERMIT ACTION REQUESTED:
renewal
RIVER BASIN:
Yadkin Pee -Dee
Test number: 1 Test number: Test number:
e Describe the point in the treatment process at which the sample was collected.
Sample was collected:
effluent
f. For each test, include whether the test was intended to assess chronic toxicity, acute toxicity, or both
Chronic toxicity
x
Acute toxicity
g. Provide the type of test performed.
Static
Static -renewal
x
Flow -through
h. Source of dilution water. if laboratory water, specify type; if receiving water, specify source.
Laboratory water
Receiving water
i. Type of dilution water. If salt water, specify "natural' or type of artificial sea salts or brine used.
Fresh water
Salt water
j. Give the percentage effluent used for all concentrations in the test series.
15,30,60,80,100
k. Parameters measured during the test. (State whether parameter meets test method specifications)
pH
meets
Salinity
Temperature
meets
Ammonia
Dissolved oxygen
meets
I. Test Results.
Acute:
Percent survival in 100%
effluent
%
%
LC5o
95% C.I.
%
%
%
Control percent survival
%
%
%
Other (describe)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 17 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP; NCO055786
renewal
Yadkin Pee -Dee
Chronic:
NOEC
100 %
%
%
IC25
%
%
%
Control percent survival
97.5 %
%
%
Other (describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available?
no
Was reference toxicant test within
acceptable bounds?
What date was reference toxicant test
run (MM/DD/YYYY)?
Other (describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
❑ Yes ® No If yes, describe:
EA. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information, or information regarding the
cause of toxicity, within the past four and one-half years, provide the dates the information was submitted to the permitting authority and a summary
of the results.
Date submitted: _e / / (MM/DD/YYYY)
Summary of results: (see instructions)
END OF PART E.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 1
b. Number of CIUs d
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Cardinal Container Services
Mailing Address: PO Box 1866
Lexington NC 27292
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cleans and conditions drums
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s):
Raw material(s): drums and IBC's
F.6. Flow Rate.
a Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
34,000 gpd (x continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
5,000 gpd (x continuous or _ intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a, Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 19 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Lexington Regional WWTP, NCO055786 renewal Yadkin Pee -Dee
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes F) No If yes, describe each episode.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional
pages as necessary.
Name: Matcor Metal Fabrication
Mailing Address: PO Box 729
Lexington NC 27274
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
OEM parts for off road heavy equipment
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Heavy const equipment, welded components and enclosures
Raw material(s): hot and cold rolled A36 steel
F.6. Flow Rate.
c- Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
6.570 gpd (x continuous or .__ intermittent)
d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
640 gpd (rc continuous or _ intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ® No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?________ 433
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
El Yes ® No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 20 of 22

F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as
necessary.
Name: Leggett & Platt. Inc Plant #1
Mailing Address: 3040 Junior Order Home Rd
Lexington NC 27292
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Fabrication of metal furniture
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge.
Principal product(s): bed frames rails
Raw material(s):
F.6. Flow Rate.
e. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day
(gpd) and whether the discharge is continuous or intermittent.
15,000 gpd (x continuous or intermittent)
f. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in
gallons per day (gpd) and whether the discharge is continuous or intermittent.
3,000 gpd (x continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ® No
b. Categorical pretreatment standards ® Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as
necessary.
Name: Leggett & PlattInc Plant #2
Mailing Address: 161 Proctor Lane
Lexington NC 27292
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Assemble wood and metal pedestal beds
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge.
Principal product(s): pedestal beds
Raw material(s): wood. metals
F.6. Flow Rate.
g. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day
(gpd) and whether the discharge is continuous or intermittent.
8,000 gpd (x continuous or intermittent)
h. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in
gallons per day (gpd) and whether the discharge is continuous or intermittent.
300 gpd (x continuous or intermittent)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 21 of 22

F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ® No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?_ _ _ 433 _
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages as
necessary.
Name: Asco Power Technologies
Mailing Address: PO Box 689
Welcome NC 27274 _
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture of electrical transfer switches and enclosures
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's discharge.
Principal product(s): Heavy electrical switch devices and cabinets
Raw material(s): steel stainless steel cooper wire
F.6. Flow Rate.
i. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day
(gpd) and whether the discharge is continuous or intermittent.
8,000 gpd (x continuous or intermittent)
j. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in
gallons per day (gpd) and whether the discharge is continuous or intermittent.
1 000 gpd (x continuous or _ intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ® No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?_._ __ 433
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 22 of 22

RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes 1] No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
Ll Truck ❑ Rail ❑ Dedicated Pipe
FA 1. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
FA2. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) [I No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 23 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Lexington Regional WWTP, NCO055786
renewal
Yadkin Pee -Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART G. COMBINED SEWER SYSTEMS
If the treatment works has a combined sewer system, complete Part G.
GA. System Map. Provide a map indicating the following: (may be included with Basic Application Information)
a. All CSO discharge points.
b. Sensitive use areas potentially affected by CSOs (e.g., beaches, drinking water supplies, shellfish beds, sensitive aquatic ecosystems, and
outstanding natural resource waters).
C. Waters that support threatened and endangered species potentially affected by CSOs.
G.2. System Diagram. Provide a diagram, either in the map provided in G.1 or on a separate drawing, of the combined sewer collection system that
includes the following information.
a. Location of major sewer trunk lines, both combined and separate sanitary.
b. Locations of points where separate sanitary sewers feed into the combined sewer system.
C. Locations of in -line and off-line storage structures.
d Locations of flow -regulating devices.
e. Locations of pump stations.
CSO OUTFALLS:
Complete questions G.3 through G.6 once for each CSO discharge point.
G.3. Description of Outfall.
a. Outfall number
b. Location
(City or town, if applicable) (Zip Code)
(County) (State)
(Latitude) (Longitude)
C. Distance from shore (if applicable) ft.
d. Depth below surface (if applicable)
e. Which of the following were monitored during the last year for this CSO?
❑ Rainfall ❑ CSO pollutant concentrations ❑ CSO frequency
❑ CSO flow volume ❑ Receiving water quality
f. How many storm events were monitored during the last year?
GA. CSO Events.
a. Give the number of CSO events in the last year.
events ([] actual or ❑ approx.)
b Give the average duration per CSO event.
hours (❑ actual or ❑ approx.)
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 24 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
. Lexington Regional WWTP, NCO055786 renewal Yadkin Pee -Dee
C. Give the average volume per CSO event.
million gallons (❑ actual or ❑ approx.)
d. Give the minimum rainfall that caused a CSO event in the last year
Inches of rainfall
G.5. Description of Receiving Waters.
a. Name of receiving water:
b. Name of watershed/river/stream system:
United State Soil Conservation Service 14-digit watershed code (if known):
c. Name of State Management/River Basin:
United States Geological Survey 8-digit hydrologic cataloging unit code (if known):
G.6. CSO Operations.
Describe any known water quality impacts on the receiving water caused by this CSO (e.g., permanent or intermittent beach closings, permanent or
intermittent shell fish bed closings, fish kills, fish advisories, other recreational loss, or violation of any applicable State water quality standard).
END OF PART G.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 25 of 22

Permit #NC0055786
Section B.3. Narrative:
Wastewater Treatment Process
Influent -An average of 2.8 MGD enters the Lexington Regional Wastewater Treatment Plant through a
single outfall that parallels Abbotts Creek.
Preliminary Treatment - Wastewater first goes through a bar screen, then it goes through the plant's
first stage lift station. The lift station consists of 4 submersible pumps and one screw pump. The lift
station presently discharges into a grit separator. A coarse bar screen was initially between the pump
discharge and the grit separator. This was removed when the plant was upgraded in 2005. Within the
next 12 months, plant staff will install a fine screen where the old coarse screen was. After the
wastewater exits the grit separator, it flows through a parshall flume and then flows by gravity to a
second stage lift station which is identical to the first stage.
BNR — Following the second stage lift station, wastewater flows by gravity to the plants BNR system,
This system is presently operated for phosphorous removal only. Nitrogen removal is incidental. Alum
is added as needed to enhance phosphorous removal. The BNR system consists to two identical units
with the influent flow split equally between them.
Final Clarifiers —Wastewater exiting the two final clarifiers is split between two final clarifiers. Return
activated sludge is recycled through the BNR system and a portion of it is wasted into a DAF unit. The
overflow from the DAF unit is returned to the head of the second stage lift station
Polishing - Following the clarifiers, the settled wastewater flows by gravity into two polishing lagoons.
Disinfection - Exiting the lagoons, wastewater enters a chlorine contact tank where it is disinfected with
a concentrated sodium hypochlorite solution. When the wastewater exits the contact tank a sodium
bisulfate solution is added for dechlorination.
Post -aeration — Following the chlorine contact tank the effluent flows through a rectangular weir where
flow is measured and then flows into a post -aeration tank where it is aerated as needed.
Effluent —The effluent is sampled upon leaving the post aeration tank and flows by gravity into Abbotts
Creek. A portion of the effluent is land applied onto 4 acres of trees on the plant site under permit
#WQ0016165.

Sludge Handling
All sludge is wasted from the BNR system into a diffused air flotation unit. Concentrated sludge from
this unit is pumped directly into four old anaerobic digesters. These digesters are presently used to
store and dewater (supernatant) the sludge before it is pumped to the compost facility. Supernatant
from these units is discharged directly to the head of the BNR System.
Concentrated sludge from these units is pumped directly to the plant's compost facility (WQ0001318).
All water removed from the sludge and from rainfall at this facility is contained and gravity flows directly
into the treatment plant's second stage lift station.
Sand is periodically removed from the BNR system and is used in the composting process.
The two polishing lagoons are periodically cleaned. The sludge from this is either pumped directly to the
compost facility or indirectly to the old digesters and then to the compost facility.
Sand (grit) from the plant's grit removal unit is hauled to the compost facility and is incorporated into
the compost process.

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