NC0021369_Renewal (Application)_20230705

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Ricky McGuinn
Town of Columbus
PO Box 146
Columbus, NC 28722-0146
Subject: Permit Renewal
Application No. NCO021369
Columbus WWTP
Polk County
Dear Permittee:
NORTH CAROLINA
Environmental Quality
July 05, 2023
The Water Quality Permitting Section acknowledges the July 5, 2023 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. 15OB-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•//dgq nc gov/permits-regulationsJpermit-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,
C�
Cynthia Demery
Administrative Assistant
Water Quality Permitting Section
North Carolina Department of Environmental Qualhy I Division of Water Resources
Ashevile Regional Office 1 2090 US. Highway 70 1 Swannanoa. North Carolina 28778
+aw� 82S.296.4500

North Carolina
Department of Environmental Quality Modified Application Form 2A
Revised March 2021
Division of Water Resources
Modified Application
Form 2A
Minor Sewage Facilities < 0.1 MGD
and No Pretreatment Program
NPDES Permitting Program
RECEIVED
JUL 0 5 2023
NCDEQ/DWR/NPDES
Note: Complete this form if your facility is a MINOR new or existing publicly owned treatment works.

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO021369
Columbus WWTP
Modified March 2021
NC Department of Environmental Quality - Application for NPDES Permit to Discharge Wastewater
Form
MINOR SEWAGE FACILITIES (Before completing this form, please read the instructions. Failure to follow
NPDES
the instructions ma result in denial of the alication.
•
• •z• •• i
Facility name
1.1
Town Of Columbus WWTP
Mailing address (street or P.O. box)
P.O. Box 146
City or town
State
ZIP code
o
Columbus
NC
28722
Contact name (first and last)
Title
Phone number
Email address
w
Christopher Cochran
Orc
[phone]
[e-mail]
c
Location address (street, route number, or other specific identifier) ❑ Same as mailing address
355 Levi Rd
U-
City or town
State
ZIP code
Columbus
NC
28722
1.2
Is this application for a facility that has yet to commence discharge?
❑ Yes 4 See instructions on data submission ❑✓ No
requirements for new dischargers.
1.3
Is applicant different from entity listed under Item 1.1 above?
❑✓ Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
Town Of Columbus
Applicant address (street or P.O. box)
r
P.O. Box 146
eo
City or town
State
ZIP code
Columbus
NC
28722
Contact name (first and last)
Title
Phone number
Email address
n
Tim Barth
Town Manager
[phone]
n
a
1.4
Is the applicant the facility's owner, operator, or both? (Check only one response.)
❑ Owner ✓❑ Operator ❑ Both
1.5
To which entity should the NPDES permitting authority send correspondence? (Check only one response.)
Facility and applicant
❑ Facility ❑ Applicant (they are one and the same)
1.6
Indicate below any existing environmental permits. (Check all that apply and print or type the corresponding permit
number for each.
€
Existing Environmental Permits
n
❑✓ NPDES (discharges to surface
❑ RCRA (hazardous waste)
❑ UIC (underground injection
c
water)
control)
E
NCO021369
❑ PSD (air emissions)
❑ Nonattainment program (CAA)
❑ NESHAPs (CAA)
W
VA
Ocean dumping (MPRSA)
❑TftFTV7M0
UVED
Other (specify)
�C
.J
�.J
JIJ 0 5 2023
Page 1
N DECK/DWR/NPDES

NPDES Pennit Number
Facility Name
Modified Application Form 2A
NCO021369
7 Columbus WWTP
Modified March 2021
1.7
Provide the collections stem information
requested below for the treatment works.
Municipality
Population
Collection System Type
Ownership Status
Served
Served
indicate percentage)
% separate sanitary sewer
❑ Own ❑ Maintain
d
% combined storm and sanitary sewer
❑ Own ❑ Maintain
it
d
❑ Unknown
El Own ❑ Maintain
c
% separate sanitary sewer
❑ Own ❑ Maintain
w
% combined storm and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
❑ Own ❑ Maintain
a%
separate sanitary sewer
❑ Own ❑ Maintain
a
% combined storm and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
❑ Own ❑ Maintain
d%
separate sanitary sewer ❑ Own ❑ Maintain
% combined storm and sanitary sewer ❑ Own ❑ Maintain
❑ Unknown ❑ Own ❑ Maintain
Total
d
Population
ci
Served
Combined Storm and
Separate Sanitary Sewer System Sanitary Sewer
%
%sewer
Total percentage of each type of
line in miles)100
z'
1.8
Is the treatment works located in Indian Country?
'o
❑ Yes ✓❑ No
r-
1.9
Does the facility discharge to a receiving water that flows through Indian Country?
c
❑ Yes ❑✓ No
1.10
Provide design and actual flow rates in the designated spaces.
Design Flow Rate
0.800 mgd
Annual Average Flow Rates Actual
Two Years Ago
Last Year
This Year
0
0.155 mgd
0.139 mgd
0.150 mgd
w u'
Maximum Daily Flow Rates Actual
Two Years Ago
Last Year
This Year
0.99 mgd
0.454 mgd
0.586 mgd
1.11
Provide the total number of effluent discharge points to waters of the State of North Carolina by type.
E
Total Number of Effluent Discharge Points by Type
a n
CD T
LM
Treated Effluent
Untreated Effluent
Combined Sewer
Bypasses
Constructed
Emergency
T
r a
Overflows
Overflows
_N
�
1
Page 2

-T
NPDES Permit Number
-T
Facility Name
Modified Application Form 2A
NCO021369
Columbus WWTP
Modified March 2021
Outfalls Other Than to Waters of the State of North Carolina
1.12
Does the POTW discharge wastewater to basins, ponds, or other surface impoundments that do not have outlets
for discharge to waters of the State of North Carolina?
❑ Yes ❑✓ No + SKIP to Item 1.14.
1.13
Provide the location of each surface impoundment and associated discharge information in the table below.
Surface Im oundment Location and Dischar a Data
Average Daily Volume
Continuous or Intermittent
Location
Discharged to Surface
(check one)
Impoundment
❑ Continuous
gpd
❑ Intermittent
❑ Continuous
gpd
❑ Intermittent
❑ Continuous
gpd
H
❑ Interm ittent
v
ter0
1.14
Is wastewater applied to land?
❑ Yes ❑✓ No SKIP to Item 1.16.
to
1.15
Provide the land application site and discharge data requested below.
y
Land Application Site and Discharge Data
c
Average Daily Volume
Continuous or
Location
Size
Applied
Intermittent
LM
check one
'°
A
acres
gpd
❑ Continuous
❑ Intermittent
0
acres
gpd
❑ Continuous
❑ Intermittent
❑ Continuous
acres
gpd
❑ Intermittent
M
1.16
Is effluent transported to another facility for treatment prior to discharge?
o
El Yes m No 4 SKIP to Item 1.21.
1.17
Describe the means by which the effluent is transported (e.g., tank truck, pipe).
1.18
Is the effluent transported by a party other than the applicant?
❑ Yes ❑ No 4 SKIP to Item 1.20.
1.19
Provide information on the transporter below.
Trans orter Data
Entity name
Mailing address (street or P.O. box)
City or town
State
ZIP code
Contact name (first and last)
Title
Phone number
Email address
Page 3

NPDES Permit Number
Facility Name
Modified Application Form 2A
NC0021369
Columbus WWTP
Modified March 2021
1.20
In the table below, indicate the name, address, contact information, NPDES number, and average daily flow rate of the
receiving facilit .
Receiving F cility Data -
Facility name
Mailing address (street or P.O. box)
a►
c
City or town
State
ZIP code
0
Contact name (first and last)
Title
0
d
Phone number
Email address
o
NPDES number of receiving facility (if any) El None
Average daily flow rate mgd
o.
0
1.21
Is the wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do
i5
not have outlets to waters of the State of North Carolina (e.g., underground percolation, underground injection)?
d
❑ Yes ❑✓ No + SKIP to Item 1.23.
r
0
1.22
Provide information in the table below on these other disposal methods.
B
Information on Other Dis osal Methods
o
Disposal
Location of
Size of
Annual Average
Daily Discharge
Continuous or Intermittent
Method
Description
Disposal Site
Disposal Site
Volume
(check one )
❑ Continuous
acres
gpd
❑ Intermittent
O
acres
gpd
❑ Continuous
❑ Intermittent
acres
gpd
❑ Continuous
❑ Intermittent
1.23
Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)? (Check all that apply.
Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
C
ElDischarges into marine waters (CWA El quality related effluent limitation (CWA Section
Cc
Section 301(h)) 302(b)(2))
❑ Not applicable
1.24
Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works
the responsibility of a contractor?
❑ Yes ❑✓ No +SKIP to Section 2.
1.25
Provide location and contact information for each contractor in addition to a description of the contractor's operational
and maintenance responsibilities.
Contractor Information
Contractor 1
Contractor 2
Contractor 3
0
Contractor name
(company name
€
Mailing address
c
street or P.O. box
S
City, state, and ZIP
o
code
Contact name (first and
ci
last
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
Page 4

NPDES Permit Number Facility Name Modified Applicator) I-orm ZA
NCO021369 Columbus WWTP Modified March 2021
SECTION 2. ADDITIONAL INFORMATION (40 CFR 122.210)(1) and (2))
c Outfalls to Waters of the State of North Carolina
2.1
Does the treatment works have a design flow greater than or equal to 0.1 mgd?
rn
o
ElYes ❑✓ No -* SKIP to Section 3.
`0
2.2
Provide the treatment works' current average daily volume of inflow
Average Daily volume of Inflow and Infiltration
gpd
t.
and infiltration.
Indicate the steps the facility is taking to minimize inflow and infiltration.
v
c
v
3
0
c
z
2.3
Have you attached a topographic map to this application that contains all the required information? (See instructions for
CL
Q,
specific requirements.)
o
CL
❑ Yes ❑ No
10
2.4
Have you attached a process flow diagram or schematic to this application that contains all the required information?
E
1O
o
(See instructions for specific requirements.)
�
" AG o
❑ Yes No ❑
2.5
Are improvements to the facility scheduled?
❑ Yes ❑ No SKIP to Section 3.
Briefly list and describe the scheduled improvements.
0
d
E
d
c.
2.
E
0 0
U)
d
3.
3
1,
N
U )
-o
4.
cc
2.6
Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Im rovements
07
i
Scheduled
Affected
Outfalls
Begin
End
Begin
Attainment of
Operational
o
Im rovement
p
(list outfall
Construction
Construction
Discharge
Level
E
(from above)
number
(MM/DD/YYYY)
(MM/DD/YYYY)
(MM/DD/YYYY)
MMIDD/YYY
v
d
-0
1.
d
L
2.
3.
4.
2.7
Have appropriate permits/clearances concerning other federal/state requirements been obtained? Briefly explain your
response.
❑ Yes ❑ No ❑ None required or applicable
Explanation:
Page 5

NPDES Permit Number
Facility Name Modified Application Form 2A
NC0021369
Columbus WWTP Modified March 2021
SECTION
3. INFORMATION
ON
EFFLUENT DISCHARGES
(40 CFR 122.210)(3) to (5))
for each outfall. (Attach additional sheets if you have more than three outfalls.)
3.1
Provide the following information
Outfall Number
Outfall Number
Outfall Number
State
NC
County
Polk
O
City or town
Columbus
0
0
c
Distance from shore
25 ft,
Y
a
.o
Depth below surface
0 ft.
ft.
ft.
0
Average daily flow rate
0.148 mgd
mgd
mgd
Latitude
35' 15' 13" N
o
Longitude
82 09, 56" W
o
3.2
Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
cc
o
❑ Yes ✓❑ No 4 SKIP to Item 3.4.
d
3.3
If so, provide the following information for each applicable outfall.
Outfall Number
Outfall Number
Outfall Number
i�
Number of times per year
o
c
discharge occurs
a
Average duration of each
o
discharge (specify units
cAverage
flow of each
mgd
mgd
mgd
U)
discharge
WMonths
in which discharge
occurs
3.4
Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes ❑✓ No 4 SKIP to Item 3.6.
3.5
Briefly describe the diffuser pe at each applicable outfall.
Outfall Number
Outfall Number
Outfall Number
d
3
0
c
Does the treatment works discharge or plan to discharge wastewater to waters of the State of North Carolina from
vi
1
3.6
one or more discharge points?
3 w
❑ Yes ❑✓ No -*SKIP to Section 6.
Page 6

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO021369
Columbus WWTP
Modified March 2021
3.7
Provide the receiving water and related information if known for each outfall.
Outfall Number
Outfall Number
Outfall Number
Receiving water name
unnamed tributatary of White
Name of watershed, river,
White Oak creek
c
or stream system
o
U.S. Soil Conservation
H
Service 14-digit watershed
o
code
Name of state
Broad
3
management/river basin
rn
U.S. Geological Survey
8-digit hydrologic
cataloging unit code
Critical low flow (acute)
cfs
cfs
cfs
Critical low flow (chronic)
cfs
cfs
cfs
Total hardness at critical
mg/L of
mg/L of
mg/L of
low flow
CaCO3
CaCO3
CaCO3
3.8
Provide the following information
describing the treatment pr vided for discharges from each outfall.
Outfall Number 001
Outfall Number
Outfall Number
Highest Level of
III Primary
❑ Primary
❑ Primary
Treatment (check all that
❑ Equivalent to
❑ Equivalent to
❑ Equivalent to
apply per outfall)
secondary
secondary
secondary
❑ Secondary
❑ Secondary
❑ Secondary
❑ Advanced
❑ Advanced
❑ Advanced
❑ Other (specify)
❑ Other (specify)
❑ Other (specify)
c
cDesign
Removal Rates by
Outfall
U)
W
BOD5 or CBOD5
85 %
%
%
d
E
d
TSS
85 %
* Not applicable
❑ Not applicable
❑ Not applicable
Phosphorus
%
%
%
❑ Not applicable
❑ Not applicable
❑ Not applicable
Nitrogen
50 %
%
%
Other (specify)
❑ Not applicable
❑ Not applicable
❑ Not applicable
Page 7

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO021369
Columbus WWTP
Modified March 2021
3.9
Describe the type of disinfection used for the effluent from each outfall in the table below. If disinfection varies by
season, describe below.
v
d
3
C
r
C
O
r_
Outfall Number 001
Outfall Number
Outfall Number
0
Disinfection type
Chlorine gas
d
0
Seasons used
d
d
Dechlorination used?
❑ Not applicable
❑ Not applicable
❑ Not applicable
~
❑✓ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
3.10
Have you completed monitoring for all Table A parameters and attached the results to the application package?
✓❑ Yes ❑ No
3.11
Have you conducted any WET tests during the 4.5 years prior to the date of the application on any of the facility's
discharges or on any receiving water near the discharge points?
❑✓ Yes ❑ No -* SKIP to Item 3.13.
3.12
Indicate the number of acute and chronic WET tests conducted since the last permit reissuance of the facility's
by outfall number or of the receiving water near the discharge points.
-discharges
Outfall Number
Outfall Number
Outfall Number
Acute
Chronic
Acute
Chronic
Acute
Chronic
cc
0
Number of tests of discharge
a'
C
'a+
water
Number of tests of receiving
r
water
r=
d
Ui
w
3.14
Does the POTW use chlorine for disinfection, use chlorine elsewhere in the treatment process, or otherwise have
reasonable potential to discharge chlorine in its effluent?
❑ Yes 4 Complete Table B, including chlorine. ✓❑ No 4 Complete Table B, omitting chlorine.
3.15
Have you completed monitoring for all applicable Table B pollutants and attached the results to this application
package?
❑✓ Yes ❑ No
Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
3.18
attached the results to this application package?
❑✓ No additional sampling required by NPDES
❑ Yes permittingauthority.
Page 8

NPDES Permit Number
Facility Name
Modified Application Form 2A
NCO021369
Columbus WWTP
Modified March 2021
3.19
Has the POTW conducted either (1) minimum of four quarterly WET tests for one year preceding this permit application
or (2) at least four annual WET tests in the past 4.5 years?
+ Complete tests and Table E and SKIP to
El Yes El
Item 3.26.
Item
3.20
Have you previously submitted the results of the above tests to your NPDES permitting authority?
❑✓ Yes ❑ No + Provide results in Table E and SKIP to
Item 3.26.
3.21
Indicate the dates the data were submitted to our NPDES permitting authority and provide a summary of the results.
Date(s) Submitted
Summary of Results
MWDD
all Passed
01/31/2023
3
C
a+
C
O
g
3.22
Regardless of how you provided your WET testing data to the NPDES permitting authority, did any of the tests result in
c
toxicity?
E
❑ Yes ❑✓ No 4 SKIP to Item 3.26.
w
3.23
Describe the cause(s) of the toxicity:
C
G1
7
tt
W
3.24
Has the treatment works conducted a toxicity reduction evaluation?
❑ Yes ❑ No 4 SKIP to Item 3.26.
3.25
Provide details of any toxicity reduction evaluations conducted.
3.26
Have you completed Table E for all applicable outfalls and attached the results to the application package?
❑ Yes Not applicable because previously submitted
information to the NPDES permittin authorit .
Page 9

NPDES Permit Number
racmry "arne Ivi I e CNN ­"
Modified March 2021
NCO021369
Columbus WWTP i
I
In Column 1 below, mark the sections of Form 2A that you have completed and are submitting with your application. For
6.1
each section, specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not
all applicants are required to provide attachments.
Column 1
Column 2
❑✓ Section 1: Basic Application
❑ wl variance request(s) ❑ wl additional attachments
Information for All Applicants
Section 2: Additional
❑ wl topographic map El w/ process flow diagram
El Information
❑ wl additional attachments
❑ w/ Table A ❑ w/ Table D
❑ Section 3: Information on
❑ w/ Table B ❑ w/ additional attachments
Effluent Discharges
E
❑ w/ Table C
d
6
U)
Section 4: Not Applicable
0
r
m
Section 5: Not Applicable
d
V
Section 6: Checklist and
❑
❑ wl attachments
Certification Statement
6.2
Certification Statement
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 submitted 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 (print or type first and last name)
Official title
Christopher Cochran
ORC
Signature
Date signed
Christopher Cochran
06/13/2023
Page 10

NPDES Permit Number
Facility Name
Outfall Number
NCO021369
Columbus WWTP
001
Modified Application Form 2A
Modified March 2021
Maximum Daily Discharge
Average Daily Discharge Analytical
ML or MDL
Value
Units
Pollutant
Number of Method'
Value Units
(include units)
Samples
Biochemical oxygen demandOML
© BOD5 or ElCBOD5
24
mg/I
1.99
mg/I
156 SM-5210B
2 mg/I ❑ MDL
(report one
Fecal coliform
<600
col/100 ml
0.08
col/100 ml
156 SM-92220
ML
1/100 ml 0 MDL
Design flow rate
0.800
MGD
0.150
MGD
365
pH (minimum)
7.2
S.U.
pH (maximum)
7.5
s.u.
Temperature (winter)
2
c
13
c
156
156
Temperature (summer)
23
c
21
c
Total suspended solids (TSS)
49
mg/I
2.45
mg/I
156 SM 2540D
OML
2.0 mg/I MDL
'Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., metnoas) approved unaer 4u L t-m iso ror ule analysis ui NUnuIdU RZ) UI NvuuLaI NaIanIULUI
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
Page 11

Number NPDES Permit Number Facility Name Outfall Number Modified Application Form 2A
Modified March 2021
NCO021369 Columbus WWTP 001
'
!' •! ! !
! !' 1 !
Average Daily Discharge
Analytical
ML or MDL
Maximum Daily
Discharge
Value
Units
Pollutant
Number of
Value Units Method
(include units)
Samples
Ammonia (as N)
9.2
mg/I
0.13
mg/I
156
SM-4500 NH3D
DIAL
0.10 mg/I ❑ MDL
Chlorine
48
Ug/I
22
Ug/I
156
SM 4500 CIA-2011
0.05mg/I ❑ ML
❑MDL
total residual, TRC 2
Dissolved oxygen
7.8
mg/I
3.95
mg/I
156
SM4500 OG2011
ML
0.1 mg/I 0 MDL
Nitratelnitrite
15.9
mg/I
2.81
mg/I
2
SM4500
ML
2.0mg/I 0 MDL
Kjeldahl nitrogen
<0.5
mg/I
0.65
mg/I
2
351.2
OML
0.5mg/I ❑ MDL
❑ ML
Oil and grease
❑ MDL
P
Phosphorus
2.74
mg/I
1.43
mg/I
2
SM450OPF
--T
0 ML
0.05 mg/I ❑ MDL
❑ ML
Total dissolved solids
1
1
1
1
1
1
L
❑ MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
2 Facilities that do not use chlorine for disinfection, do not use chlorine elsewhere in the treatment process, and have no reasonable potential to discharge chlorine in their effluent are not
required to report data for chlorine.
EPA Form 3510-2A (Revised 3-19) Page 12

EPA Identification Number NPDES Permit Number Facility Name Outfall Number
moomeu rip i fled M � h 0 21
Modified March 2021
NC0021369 Columbus WWTP
Maximum Daily Discharge Average Daily Discharge
Analytical ML or MDL
Pollutant Number of
Method' (include units)
Value Units Value Units
Samples
Metals, Cyanide, and Total Phenols
Hardness (as CaCO3)
80
mg/I
75
mg/I
3
SM2340 C
ML
5.0mg/I 0 MDL
❑ ML
Antimony, total recoverable
❑ MDL
❑ ML
Arsenic, total recoverable
❑ MDL
❑ ML
Beryllium, total recoverable
❑ MDL
Cadmium, total recoverable
<0.001
mg/I
0
mg/I
12
200.8
0.001mg/I 0 ML
❑ MDL
❑ ML
Chromium, total recoverable
❑ MDL
Copper, total recoverable
0.024
mg/I
0.008
mg/I
12
200.8
0 ML
0.001mg/I ❑ MDL
Lead, total recoverable
<0.001
mg/I
0
mg/I
4
200.8
0 ML
0.001mg/I ❑ MDL
Mercury, total recoverable
1.57
mg/I
1.57
mg/I
1
1631E
0 ML
0.500ng/I ❑ MDL
❑ ML
Nickel, total recoverable
❑ MDL
❑ ML
Selenium, total recoverable
❑ MDL
Silver, total recoverable
<0.001
mg/I
0
mg/I
12
200.8
ML
O.00lmg/I 0 MDL
❑ ML
Thallium, total recoverable
❑ MDL
Zinc, total recoverable
0.007
mg/I
0.065
mg/I
4
200.8
0 ML
0.001 md ❑ MDL
Cyanide
0.006
mg/I
0.001
mg/I
12
SM4500NH3D
0.005 md ❑ MI
❑ MDL
❑ ML
Total phenolic compounds
❑ MDL
Volatile Organic Compounds
❑ ML
Acroleln
❑ MDL
❑ ML
Acrylonitrile
❑ MDL
❑ ML
Benzene
❑ MDL
❑ ML
Bromoform
❑ MDL
EPA Form 3510-2A (Revised 3-19) Page 13

EPA Identification Number NPDES Permit Number Facility Name Outfall Number
nnooineo Ap roan 1,
Modicanon
ffied March 2021
NCO021369 Columbus WWTP
MM •' �
Maximum Daily Discharge Average Daily Discharge
Analytical ML or MDL
Pollutant Number of
Method' (include units)
Value Units Value Units
Samples
❑ ML
Carbon tetrachloride
❑ MDL
❑ ML
Chlorobenzene
❑ MDL
❑ ML
Chlorodibromomethane
❑ MDL
❑ ML
Chloroethane
❑ MDL
❑ ML
2-chloroethylvinyl ether
❑ MDL
❑ ML
Chloroform
❑ MDL
❑ ML
Dichlorobromomethane
❑ MDL
❑ ML
1,1-dichloroethane
❑ MDL
❑ ML
1,2-dichloroethane
❑ MDL
❑ ML
trans-1,2-dichloroethylene
❑ MDL
❑ ML
1,1-dichloroethylene
❑ MDL
❑ ML
1,2-dichloropropane
❑ MDL
❑ ML
1,3-dichloropropylene
❑ MDL
❑ ML
Ethylbenzene
❑ MDL
❑ ML
Methyl bromide
❑ MDL
❑ ML
Methyl chloride
❑ MDL
❑ ML
Methylene chloride
❑ MDL
❑ ML
1,1,2,2-tetrachloroethane
❑ MDL
❑ ML
Tetrachloroethylene
❑ MDL
❑ ML
Toluene
❑ MDL
❑ ML
1, 1, 1 -trichloroethane
❑ MDL
❑ ML
1,1,2-trichloroethane
❑ MDL
EPA Form 3510-2A (Revised 3-19) Page 14

EPA Identification Number NPDES Permit Number Facility Name Outfall Number
Modified Application Form 2A
Modified March 2021
NCO021369 Columbus WWTP
Maximum Daily Discharge Average Daily Discharge
Analytical ML or MDL
Pollutant
Number of
Method' (include units)
Value Units Value Units
Sam les
Trichloroethylene
0 ML
❑ MDL
Vinyl chloride
OML
❑ MDL
Acid -Extractable Compounds
p-chloro-m-cresol
11 ML
❑ MDL
2-chlorophenol
0 ML
❑ MDL
2,4-dichlorophenol
0 ML
❑ MDL
2,4-dimethylphenol
EIML
❑ MDL
4,6-dinitro-o-cresol
❑ ML
❑ MDL
2,4-dinitrophenol
0 ML
❑ MDL
2-nitrophenol
0 ML
❑ MDL
4-nitrophenol
❑ ML
❑ MDL
Pentachlorophenol
❑ ML
❑ MDL
Phenol
❑ ML
❑ MDL
2,4,6-trichlorophenol
0 ML
❑ MDL
Base -Neutral Compounds
Acenaphthene
0 ML
❑ MDL
Acenaphthylene
0 ML
❑ MDL
Anthracene
❑ ML
❑ MDL
Benzidine
❑ ML
❑ MDL
Benzo(a)anthracene
0 ML
❑ MDL
Benzo(a)pyrene
❑ ML
❑ MDL
3,4-benzofluoranthene
❑ ML
❑ MDL
EPA Form 3510-2A (Revised 3-19) Page 15

EPA Idenfification Number NPDES Permit Number Facility Name Outfall Number
Modified Application Form 2A
NCO021369 Columbus WWTP
Modified March 2021
Maximum Daily Discharge Average Daily Discharge
Analytical ML or MDL
Pollutant
Number of
Method' (include units)
Value Units Value Units
Samples
Benzo(ghi)perylene
0 ML
❑ MDL
Benzo(k)fluoranthene
OML
❑ MDL
Bis (2-chloroethoxy) methane
❑ ML
❑ MDL
Bis (2-chloroethyl) ether
11 MIL
❑ MDL
Bis (2-chloroisopropyl) ether
11 ML
❑ MDL
Bis (2-ethylhexyl) phthalate
❑ ML
❑ MDL
4-bromophenyl phenyl ether
❑ ML
❑ MDL
Butyl benzyl phthalate
OMIL
❑ MDL
2-chloronaphthalene
0 ML
❑ MDL
4-chlorophenyl phenyl ether
❑ ML
❑ MDL
Chrysene
❑ ML
❑ MDL
di-n-butyl phthalate
❑ ML
❑ MDL
di-n-octyl phthalate
❑ ML
❑ MDL
Dibenzo(a,h)anthracene
❑ ML
❑ MDL
1,2-dichlorobenzene
❑ M
MDL
ElI
1,3-dichlorobenzene
❑ ML❑
MDL
1,4-dichlorobenzene
❑ ML
❑ MDL
3,3-dichlorobenzidine
❑ ML
❑ MDL
Diethyl phthalate
❑ ML
❑ MDL
Dimethyl phthalate
❑ ML
❑ MDL
2,4-dinitrotoluene
❑ ML
❑ MDL
2,6-dinitrotoluene
❑ ML
❑ MDL
EPA Form 3510-2A (Revised 3-19) Page 16

EPA Idenfification Number NPDES Permit Number Facility Name Outfall Number
Modified Application Form 2A
Modified March 2021
NCO021369 Columbus WWTP
' •• '•
Maximum Daily Discharge Average Daily Discharge
Analytical ML or MDL
Pollutant Number of
Method' (include units)
Value Units Value Units Samples
1,2-diphenylhydrazine
11 MIL
❑ MDL
Fluoranthene
❑ ML
❑ MDL
Fluorene
❑ ML
❑ MDL
Hexachlorobenzene
❑ ML
❑ MDL
Hexachlorobutadiene
❑ MI
❑ MDL
Hexachlorocyclo-pentadiene
0 ML
❑ MDL
Hexachloroethane
❑ ML
❑ MDL
Indeno(1,2,3-cd)pyrene
0 ML
❑ MDL
Isophorone
0 ML
❑ MDL
Naphthalene
❑ ML
❑ MDL
Nitrobenzene
❑ ML
❑ MDL
N-nitrosodi-n-propylamine
0 ML
❑ MDL
N-nitrosodimethylamine
0 MIL
❑ MDL
N-nitrosodiphenylamine
❑ ML
❑ MDL
Phenanthrene
❑ MIL I
❑ MDL
Pyrene
❑ MDL
1,2,4-trichlorobenzene
❑ ML
❑ MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I, Subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A (Revised 3-19) Page 17

NPDES Permit Number Facility Name Outfall Number
Modified Application Form 2A
Modified March 2021
NC0 )21369 Columbus WWTP
• •I • •• • • C •� •'
Maximum DailyDischarge Average Dail Dischar a
Analytical ML or MDL
Pollutant Number
(list) Value Units Value Units
Method' (include units)
Samples
❑ No additional sampling is required by NPDES permitting authority.
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required
under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
Page 18