NC0021890_Renewal Application_20181024

ROY COOPER NORTH CAROLINA
GoLer nor Environmental Quality
MICHAEL S- REGAN
Secretary
LINDA CUTPEPPER
Interim Director
November 05, 2018
Chris Graybeal
Town of Granite Falls
PO Drawer 10
Granite Falls, NC 28630-0010
Subject: Permit Renewal
Application No. NCO021890
Granite Falls WWTP
Caldwell County
Dear Applicant:
The Water Quality Permitting Section acknowledges the October 24, 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.
ec: WQPS Laserfiche File w/application
Sincerely,
Wren Thed ord
Administrative Assistant
Water Quality Permitting Section
=X�i1NCa9ac�D F 5
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North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-807-6300

FACILITY NAME AND PERMIT NUMBER:
Granite Falls VWVTP, NCO021890
BASIC APPLICATION INFORMATION
PERMIT ACTION REQUESTED: RIVER BASIN:
Renewal Catawba
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 Town of Granite Falls Wastewater Treatment Plant
Mailing Address Post Office Drawer 10
Granite Falls NC 28630
Contact Person
Title Water Resources Director
Telephone Number ([phone] RECEIVED/DENR/DWR
Facility Address 60 Meandering Way OCT 2 5 2w
(not P.O. Box) Granite Falls NC 28630 Water Resour :es
A.2. Applicant Information. If the applicant is different from the above, provide the following: Permitting Section
Applicant Name
Mailing Address
Contact Person
Title
Telephone Number
Is the applicant the owner or operator (or both) of the treatment works?
x❑ owner x❑ operator
Indicate whether correspondence regarding this permit should be directed to the facility or the applicant.
x❑ 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 NCO021890 PSD
UIC Other
RCRA Other
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
Town of Granite Falls 4,643 Separate Municipal
Total population served 4,643
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:
Granite Falls WWTP, NCO021890 Renewal Catawba
A.S. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes x❑ 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 x❑ No
A.S. 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 121" month of "this year' occurring no more than three months prior to this application submittal.
a. Design flow rate .900 MGD
Two Years Ago Last Year This Year
b. Annual average daily flow rate .302 .346 .382
C. Maximum daily flow rate 1.758 1.351 1.620
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.
x❑ 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.? x❑ 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:
d
Location:
Number of acres:
Annual average daily volume applied to site:
Is land application ❑ continuous or ❑ intermittent?
Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works?
x❑ No
❑ Yes x❑ No
MGD
❑ Yes x❑ 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:
Granite Falls WWTP, NCO021890
Renewal
Catawba
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).
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
Mailing Address
Contact Person
Title
Telephone Number ( )
If known, provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility.
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
x❑ No
If yes, provide the following for each disposal method:
Description of method (including location and size of site(s) if applicable):
Annual daily volume disposed by this method:
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:
Granite Falls WWTP, NCO021890 Renewal Catawba
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
b. Location Granite Falls
28630
(City or town, if applicable)
(Zip Code)
Caldwell
NC
(County)
(State)
35' 47' 51" N
81 ° 24' 40" W
(Latitude)
(Longitude)
C. Distance from shore (if applicable)
ft.
d. Depth below surface (if applicable)
ft.
e. Average daily flow rate .382
MGD
f. Does this outfall have either an intermittent or a periodic discharge? ❑ Yes
x❑ No (go to A.g.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?
A.10. Description of Receiving Waters.
❑ Yes x❑ No
a. Name of receiving water Gun Powder Creek
b. Name of watershed (if known) Upper Catawba
United States Soil Conservation Service 14-digit watershed code (if known):
C. Name of State Management/River Basin (if known): Catawba River Basin
United States Geological Survey 8-digit hydrologic cataloging unit code (if known): 03050101
d. Critical low flow of receiving stream (if applicable)
acute cfs chronic cfs
e. Total hardness of receiving stream at critical low flow (if applicable): 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:
Granite Falls WWTP, NCO021890
Renewal
Catawba
A.11. Description of Treatment
a. What level of treatment are provided? Check all that apply.
❑ Primary x❑ Secondary
❑ Advanced ❑ Other. Describe:
b. Indicate the following removal rates (as applicable):
Design BOD5 removal or Design CBOD5 removal BOD5 88 %
Design SS removal 85
Design P removal NA %
Design N removal NA %
Other %
C. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe:
Chlorine Gas
If disinfection is by chlorination is dechlorination used for this outfall? x❑ Yes ❑ No
Does the treatment plant have post aeration? x❑ 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
PARAMETER
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.0
S.U.
pH (Maximum)
7.6
s.u.
Flow Rate
2.34
MGD
0.382
MGD
Continous
Temperature (Winter)
15.7
Celsius
13.9
Celsius
99
Temperature (Summer)
26.3
Celsius
23.3
Celsius
117
• For pH please report a minimum and a maximum daily value
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
MUMDL
Conc.
Units
Conc.
Units
Number of
METHOD
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN
BOD5
23.2
mg/I
5.5
mg/1
410
SM5210 B-
DEMAND
2001
(Report one)
CBOD5
FECAL COLIFORM
350
/100m1
38.0
/100ml
410
SM9222D-
2006 MF
TOTAL SUSPENDED SOLIDS (TSS)
37.0
Mg/I
8.6
mg/I
410
SM2540D-
2011
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:
Granite Falls WVVfP, NCO021890
Renewal
Catawba
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.
111,000 gpd
Briefly explain any steps underway or planned to minimize inflow and infiltration.
Flow monitoring, Flow testing , Smoke testing, Line repair and replacement as budget funding allows
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 '% 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 (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 x❑ 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:
Mailing Address:
Telephone Number: ( )
Responsibilities of Contractor:
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 B.6.)
a. List the outfall number (assigned in question A.9) for each outfall that is covered by this implementation schedule.
001
b. Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies.
❑ Yes x❑ No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 8 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Granite Falls , NCO021890
Renewal
Catawba
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: 001
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
MLIMDL
Conc.
Units
Conc.
Units
Number of
METHOD
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA (as N)
4.4
mg/I
0.7
mg/I
410
ASTM D1426
CHLORINE (TOTAL
RESIDUAL, TRC)
21.0
Ug/I
<20
Ug/I
410
SM4500CLG
DISSOLVED OXYGEN
10.5
mg/I
8.2
mg/I
410
SM45000G-
2001 LDO
TOTAL KJELDAHL
NITROGEN (TKN)
3.08
m /I
g
1.6
m g /I
11
SM20 450ONB
NITRATE PLUS NITRITE
NITROGEN
16.0
m /I
g
8.10
m /I
g
11
SM20 4500
NO3
OIL and GREASE
PHOSPHORUS (Total)
4.7
mg/I
3.25
mg/I
11
SM20
ED4500
TOTAL DISSOLVED SOLIDS
(TDS)
OTHER Total Nitrogen
17.12
mg/I
9.72
mg/I
11
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 8 7550-22. Page 9 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Granite Falls WWTP, NCO021890
Renewal
Catawba
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:
x❑ 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 Chris Gra
Signature
Telephone number [phone]
Date signed 10/17/18
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 10 of 22

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GRANITE FALLS WASTEWATER TREATMENT PLANT
PROCESS SCHEMATIC

Town of Granite Falls Facility
Granite Falls WWTP Location
Latitude: 35' 47' 5 1 " N State Grid: Granite Falls not to scale
Longitude: 81 ° 24' 40" W Permitted Flow: 0.900 MGD
Receiving Stream: Gunpowder Creek Stream Class: WS-1V CA NPDES Permit No. NCO021890
IDrainageBasin: Catawba River Basin Sub -Basin: 03-08-32 North Caldwell County

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Granite Falls WWTP, NCO021890 Renewal Catawba
A.5. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes x❑ 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 x❑ 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 121" month of "this year" occurring no more than three months prior to this application submittal.
a. Design flow rate .900 MGD
Two Years Ago
b. Annual average daily flow rate
Last Year This Year
.346 .382
C. Maximum daily flow rate 1.758 1.351 1.620
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.
x❑ 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.? x❑ 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:
x❑ No
Location:
Annual average daily volume discharge to surface impoundment(s) MGD
Is discharge ❑ continuous or ❑ intermittent?
C. Does the treatment works land -apply treated wastewater? ❑ Yes x❑ No
If yes, provide the following for each land application site:
Location:
Number of acres:
Annual average daily volume applied to site: MGD
Is land application ❑ continuous or ❑ intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works? ❑ Yes x❑ 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:
Granite Falls WWTP, NCO021890
Renewal
Catawba
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).
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
Mailing Address
Contact Person
Title
Telephone Number ( )
If known, provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility.
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
x❑ No
If yes, provide the following for each disposal method:
Description of method (including location and size of site(s) if applicable):
Annual daily volume disposed by this method:
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:
Granite Falls WWTP, NCO021890 Renewal Catawba
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 Granite Falls
28630
(City or town, if applicable)
(Zip Code)
Caldwell
NC
(County)
(State)
35° 47' 51" N
81° 24' 40" W
(Latitude)
(Longitude)
C.
Distance from shore (if applicable)
ft.
d.
Depth below surface (if applicable)
ft.
e.
Average daily flow rate .382
MGD
f.
Does this outfall have either an intermittent or a periodic discharge? ❑ Yes
x❑ 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
x❑ No
A.10. Description of Receiving Waters.
a. Name of receiving water Gun Powder Creek
b. Name of watershed (if known) Upper Catawba
United States Soil Conservation Service 14-digit watershed code (if known):
C. Name of State Management/River Basin (if known): Catawba River Basin
United States Geological Survey 8-digit hydrologic cataloging unit code (if known): 03050101
d. Critical low flow of receiving stream (if applicable)
acute cfs chronic cfs
e. Total hardness of receiving stream at critical low flow (if applicable): 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:
Granite Falls WWTP, NCO021890
Renewal
Catawba
A.11. Description of Treatment
a. What level of treatment are provided? Check all that apply.
❑ Primary x❑ Secondary
❑ Advanced ❑ Other. Describe:
b. Indicate the following removal rates (as applicable):
Design BOD5 removal or Design CBOD5 removal BOD5 88 %
Design SS removal 85 %
Design P removal NA %
Design N removal NA %
Other %
C. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe:
Chlorine Gas
If disinfection is by chlorination is dechlorination used for this outfall? x❑ Yes ❑ No
Does the treatment plant have post aeration? x❑ 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
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
PARAMETER
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.0
S.U.
pH (Maximum)
7.6
S.U.
Flow Rate
2.34
MGD
0.382
MGD
Continous
Temperature (Winter)
15.7
Celsius
13.9
Celsius
99
Temperature (Summer)
26.3
Celsius
23.3
Celsius
117
For pH please report a minimum and a maximum daily value
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Conc.
Units
Conc.
Units
Number of
METHODSamples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN
BOD5
23.2
mg/I
5.5
mg/I
410
SM5210 B-
2001
DEMAND (Report one)
CBOD5
FECAL COLIFORM
350
/100ml
38.0
/100ml
410
SM9222D-
2006 MF
TOTAL SUSPENDED SOLIDS (TSS)
37.0
Mg/I
8.6
mg/I
410
SM2540D-
2011
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 6 of 22

ROY COOPER NORTH CAROLINA
Goverr,or Environmental Quarity
MICH EL S- REGAN
Secretml
LINDA CULPEPPER
Interco¢ Director
October 24, 2018
Chris Graybeal
Town of Granite Falls
PO Drawer 10
Granite Falls, NC 28630-0010
Subject: Permit Renewal
Application No. N00021890
Granite Falls WWTP
Caldwell County
Dear Applicant:
The Water Quality Permitting Section acknowledges the October 24, 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. 150B-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-quidance/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.
ec: WQPS Laserfiche File w/application
Sincerely,
'$(0KR0-
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
.a,D E W:>
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mad Service Center I Raleigh, North Carolina 27699-1617
919-807-6300

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Granite Falls WWTP, NCO021890
Renewal
Catawba
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.S. 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.
111,000 gpd
Briefly explain any steps underway or planned to minimize inflow and infiltration.
Flow monitoring Flow testing Smoke testing Line repair and replacement as budget funding allows
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 % 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 (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.
B.4. 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 x❑ 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:
Mailing Address:
Telephone Number: ( )
Responsibilities of Contractor:
B.S. 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 B.6.)
a. List the outfall number (assigned in question A.9) for each outfall that is covered by this implementation schedule.
001
b. Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies.
❑ Yes x❑ No
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 8 of 22