NC0079057_Renewal (Application)_20230525

�,a STATE a
11
ROY COOPER 1
Governor
-
� nnw .�
ELIZABETH S.BISER "'+u
•�xgu„m9w°.
Secretary n,
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
May 25, 2023
Town of Monteo
Attn: Joshua O'Brien, Director
PO Box 246
Manteo, NC 27954-0246
Subject: Permit Renewal
Application No. NC0079057
Manteo WWTP
Dare County
Dear Applicant:
The Water Quality Permitting Section acknowledges the May 25, 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. 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://deq.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
ren T edford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
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NorthWashington CarolinaRegional Department of EnvironmealWashingtonnt QualitySquare Mall!Divisio Washington of Watern.Resources
Q 9 Office 943 North Carolina 27889
komara ur..�u aNif / 252 946 6481

[ETOWN a
OF .l
PRESERVE II VIT
PROSPER
Water and Sewer Department
May 19, 2023
Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: REQUEST FOR NPDES PERMIT RENEWAL OF TOWN OF MANTEO WWTP
PERMIT No. NC0079057
Manteo WWTP
Dare County
Please take this letter as the official request for the renewal of the Town's Wastewater
Treatment Plant (WWTP) Permit. All applicable applicant information and attachments have
been provided as listed below:
1. Cover Letter
2. Completed Application Form (EPA FORM 2A, Table A-B)
3. Letter describing our Sludge Management Plan for the WWTP
4. Sample Results provided for a request of continuance on current Reduced Monitoring as
existing on current WWTP permit
5. Map of Outfall 001
6. Process flow diagram of the WWTP
I am requesting a continuance of Reduced Monitoring as it exists on our current WWTP permit
for BOD5, TSS, NH3-N and Enterococci to keep to a 2/week minimum frequency. We have not
exceeded weekly or monthly limits for these target parameters in the last three years. No civil
penalties for any of these target parameters have been issued in the last three years. The
WWTP is not under an SOC for these target parameters nor is the WWTP on the EPA Quarterly
Noncompliance Report for these target parameters. Neither the permittee or any of its
employees are under investigation or have committed criminal violations in the previous five
years. There were 0 total BOD5, TSS and NH3-N results over the 200%threshold for the last
three years, under the limit of 15. There were 1 total Enterococci results over the 200%
threshold for the last three years, under the limit of 20. Please see below for averages on the
requested target parameters that are all under the 50% criteria for the last three years:
1

Three-year arithmetic means: Parameter: Result:
BOD5 (April—October) .44 mg/L
BOD5 (November- March) 1.17 mg/L
TSS 0 mg/L
NH3-N (April—October) .01 mg/L
NH3-N (November- March) .04 mg/L
Three-year geometric mean: Parameter: Result:
Enterococci 1.6/ 100 mL
Percent of monthly limit: Parameter: Result:
BOD5 (April — October) 9 %
BOD5 (November- March) 12 %
TSS 0 %
NH3-N (April — October) 1 %
NH3-N (November- March) 1 %
Enterococci 5 %
I am also requesting a continuance of Reduced Monitoring as it exists on our current WWTP
permit for instream sampling for Outfall 001 as one sampling trip per week all year as opposed
once per week in the winter months and three times weekly in June,July, August and
September as it was required previously. In order to sample, we must use a boat to get to each
of the five sample sites within Shallowbag Bay. At times during the summer, due to storms or
maintenance requirements to the boat, and other operational duties, we have found it difficult
to meet that requirement. The summer months have become cumbersome on scheduling and
staff as well as the fuel cost for maintaining that many days a week. All sample results have all
come back within normal ranges with no abnormalities and have been submitted each month
with our EDMRs.
According to the Town of Manteo's "Compliance for Total Copper and Dibromochloromethane
Limitations Action Plan" as required in Section A (4) in our current permit (Schedule of
Compliance for Total Copper and Dibromochloromethane Limitations), we have been feeding a
dual-chemical program to reduce the Total Copper in the effluent by injecting small doses of a
copper/metal precipitant along with an inorganic/organic coagulant into the splitter box prior
to the secondary clarifiers by way of 55-gallon drums and small chemical piston pumps via vinyl
tubing. We are currently working our way through the funding process to replace our current
liquid chlorination and dechlorination process with ultraviolet
et disinfection to achieve long term
compliance with the new Dibromochloromethane limit in our current permit. The Ultraviolet
(UV) Disinfection and Resiliency Upgrade Project will also replace our current 300kw WWTP
standby generator with a 500kw WWTP standby generator which will be able to provide
standby power to all WWTP processes as opposed to those that are currently only deemed
"essential." Project number for the UV Disinfection and Resiliency Upgrade Project is Project
No. CS370798-03. The Bid and Design Package will be submitted by Green Engineering on the
town's behalf before the milestone deadline of August 1st, 2023. Since July 15t, 2022, the date
2

t
the town was given to be compliant within the schedule of compliance, we have only had one
daily maximum permit exceedance for Total Copper in January 2023 which was a result of 6.0
ug/L (.02 ug/L above the daily maximum). We have not exceeded the limit for
Dibromochloromethane within this timeframe. Please see below for average sample results for
both Total Copper and Dibromochloromethane:
Sample results from July 1', 2022 through April 2023:
Parameter Monthly Average Monthly Aver. Limit Daily Max Limit
Total Copper 2.1 ug/L 3.7 ug/L 5.8 ug/L
Dibromochloromethane 11.3 ug/L 21.0 ug/L 21.0 ug/L
No physical changes have been made at the WWTP nor have there been any other permit
exceedances since the issuance of our last permit.
Sincerely,
‘r :=y17cD
Josh O'Brien
Water and Sewer Director
Town of Manteo
PO Box 246
Manteo, NC 27954
[phone] (office)
[phone] (cell)
[e-mail]
3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
Form U.S.Environmental Protection Agency
2A 43EPA Application for NPDES Permit to Discharge Wastewater
NPDES NEW AND EXISTING PUBLICLY OWNED TREATMENT WORKS
SECTION 1.BASIC APPLICATION INFORMATION FOR ALL APPLICANTS(40 CFR 122.21(j)(1)and(9))
1.1 Facility name
Town of Manteo
Mailing address(street or P.O.box)
PO Box 246
City or town State ZIP code
Manteo NC 27954
Contact name(first and last) Title Phone number Email address
2 Joshua O'Brien Water and Sewer Director 252
( )216-5314 [e-mail]
R Location address(street,route number,or other specific identifier) 0 Same as mailing address
co710 Bowsertown Rd.
City or town State ZIP code
Manteo NC 27954
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
c Applicant address(street or P.O. box)
City or town Stat
o
e ZIP code
c
.r
Contact name(first and last) Title Phone number Email address
1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
❑ Owner El Operator ❑ Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
❑ Facility 0 Applicant 0 Facility and 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.)
a. Existing Environmental Permits
✓❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
water) control)
g NC0079057 —
0 PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CAA)
c
w
co
1 El Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section ❑ Other(specify)
404)
EPA Form 3510-2A(Revised 3-19)
Page 1

•
EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
1.7 Provide the collection system information requested below for the treatment works.
Municipality Population Collection System Type Ownership Status
Served Served (indicate percentage)
100 %separate sanitary sewer ❑ Own ❑ Maintain
1 Town of Manteo 1600 %combined storm and sanitary sewer ❑ Own 0 Maintain
0 Unknown ❑ Own ❑ Maintain
c ___ %separate sanitary sewer ❑ Own ❑ Maintain
%combined storm and sanitary sewer ❑ Own 0 Maintain
_ ❑ Unknown 0 Own ❑ Maintain
%separate sanitary sewer 0 Own ❑ Maintain
" %combined storm and sanitary sewer El Own ❑ Maintain
$ ❑ Unkncwn ❑ Own 0 Maintain
%separate sanitary sewer 0 Own 0 Maintain
%combined storm and sanitary sewer 0 Own 0 Maintain
n 0 Unknown 0 Own 0 Maintain
Total
Population
ra Served
Separate Sanitary Sewer System Co bI torm'and
Sanitary Sewer
Total percentage of each type of % %
sewer line(in miles) 100
1.8 Is the treatment works located in Indian Country?
0 Yes 0 No
1.9 Does the facility discharge to a receiving water that flows through Indian Country?
❑ Yes ❑✓ No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate ,
.600 mgd
1 _ Annual Average Flow Rates(Actual)
Two Years Ago LDe
ast Year _ This Year __
c a z7s mgd .,�.w.. .261 mgd �___..______..__..____- .245 mgd
.2'ri
t§ _ Maximum Daily Flow Rates(Actual)
'two Years Ago Last Year This Year _
.700 mgd .627 mgd .393 mgd
1 Provide the total number of effluent discharge points to waters of the United States by type.
Total Number of Effluent Dischar a Points by type _
°'! Treated Effluent Untreated Effluent Combined Sewer
Constructed
° Overflows Bypasses Emergency
:. Overflows
in 1
EPA Form 3510-2A(Revised 3-19)
Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
Outfalls Other Than to Waters of the,United States- - -
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 United States?
❑ Yes ❑✓ No 4 SKIP to Item 1.14.
1.13 Provide the location of each surface impoundment ana associated discharge information in the table below.
Surface lmpo and ent tocti , and*ire;Data . .., _n _ .
Averatle Daf1"harne Continuous or MCetrmlttent`
Location Discharged to Surface
itnpoundm8rt* w., (check orte)
0 Continuous
gpd ❑ Intermittent
0 Continuous
gpd ❑ Intermittent 1
0 Continuous
gpd 0 Intermittent
I 1.14 Is wastewater applied to land?
❑ Yes ❑✓ No 4 SKIP to Item 1.16.
1.15 Provide the land application site and discharge data requested below.
...,.. Land Application.Sittant � .,„
Volume Continuous or. ., .
Location Site ' Applied lntelmIttent
_01)` acres gpd
0 Continuous
ifs ❑ Intermittent
acres d 0 Continuous
gp 0 Intermittent
V acres d 0 Continuous
gp cu
0 Intermittent
1.16 Is effluent transported to another facility for treatment prior to discharge?
p ElYes 0No 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 appl cant?
❑ Yes 0 No 4 SKIP to Item 1.20.
1.19 Provide information on the transporter below.
itarISporter bafa .
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
EPA Form 3510-2A(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040 0004
1.20 In the table below, indicate the name,address,contact information, NPDES number,and average daily flow rate of the
receiving facility.
eceiving Facility Data: ..
-g Facility name Mailing address(street or P.O.box)
c
'c City or town State ZIP code
0
(..)
Contact name(first and last) Title
I Phone number Email address
NPDES number of receiving facility(if any) ❑None Average daily flow rate mgd
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 not
have outlets to waters of the United States(e.g., underground percolation, underground injection)?
❑ Yes 0 No 4 SKIP to Item 1.23.
• 1.22 Provide information in the table below on these other disposal methods.
t , , Information on Other Disposal Methods
Disposal Location of Sizthode of Annual-Average D�, dnuoua w intermittent
Is scrlpti Disposal Site Disposal Site Daily Discharge
Description p . ...,.. . . Volute (check one)
8 aacres d 0 Continuous
9P ❑ Intermittent
acresgpd ❑ 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.)
❑ Discharges into marine waters(CWA ❑ Water quality related effluent limitation(CWA Section
a
Section 301(h)) 302(b)(2))
0 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 0 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;InWrmiatiOn;
Contractor I contractor 2 Contractor 3
Contractor name
(company name)
Mailing address
(street or P.O.box)
City,state,and ZIP —
code
g Contact name(first and
t, last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
EPA Form 3510-2A(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
I Outfalts to Water*of the United States .
It 2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
�a� El Yes 0 No.4 SKIP to Section 3.
2.2 Provide the treatment works'current average daily volume of inflow Average Deily Volume of Infirm/and Infiltration ,
and infiltration.
gpd
Indicate the steps the facility is taking to minimize inflow and infiltration.
li Monitoring rainfall with rain gauge at WWTP verses flow meters installed at pump stations in collection system.Use of
gsmoke testing,pipe cameras and CCTV inspections for determining possible l&I locations for point repairs.This year
replaced oldest pump station that is nearest to Shallowbag Bay and sound-rise events(inflow).
2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
ispecific requirements.)
o 0 Yes ❑ No
2.4 Have you attached a process flow diagram or schematic to this application that contains all the required information?
3 (See instructions for specific requirements.)
.8
W . 0 Yes ❑ No
2.5 Are improvements to the facility scheduled?
0 Yes ❑ No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
I 1. UV Disinfection and Resiliency Upgrade.Project NO.CS370798-03
2.
3.
a 4.
2.6 Provide scheduled or actual dates of completion for improvements.
Si Scheduled or Actuaf of Compti+ Ion for:tmprr mants
Scheduled ... AffectedSegln '(n 1 atnM+en.
Cfutfalls t�atlerrm's
Improvement a (list outfall Construction Construction t►ein I7illtcht a
(from above) toot
number) (MM/[�d1YYYY) .,, . (MMIi�.. ....Y),,.,. ,.I ITI ONTYY�,,.
1. 001 05/01/2024
g 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:
We are currently going through the funding process milestones required by NC DWI for this project.Referenced date of
begin rnnctrurtinn ahnva is a milactnna data Rid
and f)acian Package will he cuhmittarl for review by Auuuct 1 711I7�
EPA Form 3510-2A(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
SECTION 3.INFORMATION ON EFFLUENT DISCHARGES(40 CFR 122.21(j)(3)to(5))
3.1 Provide the following information for each outfall.(Attach additional sheets if you have more than three outfalls.)
Outfall<Number 001 Outfall Number __ Outfall Number .. ...
State NC
gCounty Dare
0 City or town Manteo
C!
C
0 Distance from shore 3600 ft. ft. ft.
uz
IDepth below surface 11 ft. ft. ft.
Average daily flow rate mgd mgd mgd
Latitude 35° 54' 24" °
Longitude 75° 39' 28" ° II 0
"
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
RI 0 Yes ✓❑ No 4 SKIP to Item 3.4.
to
2 3.3 If so,provide the following information for each applicable outfall.
Outfall Number. Outfall Number . . ,,. . Outfalr`Number _.
Number of times per year
discharge occurs
a Average duration of each
t discharge(specify units) _
c Average flow of each
discharge mgd mgd mgd
Months 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.
a 3.5 Briefly describe the diffuser type at each applicable outfall.
• 1— Outten Number0o1 Outfell'Number OWN`Number
12"DIP diffuser with 2"copper
risers
% uS 3.6 Does the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
I discharge points?
❑✓ Yes 0 No 9SKIP to Section 6.
EPA Form 3510-2A(Revised 3-19)
Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
3.7 Provide the receiving water and related information(if known)for each outfall.
Outfall Number ooi Outfall Number_____ OutfaliNum er
Receiving water name Shallowbag Bay
Name of watershed,river, Pasquotank River Basin
or stream system
.2" U.S.Soil Conservation
1 Service 14-digit watershed
al code
t Name of state
3 management/river basin
.o U.S.Geological Survey
8-digit hydrologic
recataloging 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 provided for discharges from each outfall.
Outfall Number poi_ . OutfaW Number . ..., Outten Number
Highest Level of 0 Primary ❑ Primary 0 Primary
Treatment(check all that 0 Equivalent to 0 Equivalent to 0 Equivalent to
apply per outfall) secondary secondary secondary
O Secondary 0 Secondary 0 Secondary
O Advanced 0 Advanced 0 Advanced
O Other(specify) 0 Other(specify) 0 Other(specify)
Tertiary
IDesign Removal Rates by
IDuffel!
BODs or CBODS 98 % %°
°
0 TSS 85 % % %
It
VI Not applicable 0 Not applicable 0 Not applicable
Phosphorus
ok
0 Not applicable 0 Not applicable 0 Not applicable
Nitrogen
90 %
Other(specify) la Not applicable 0 Not applicable 0 Not applicable
% •% %
EPA Form 3510-2A(Revised 3-19)
Page 7

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
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.
Current disinfection is sodium hypochlorite liquid feed.Currently going through funding process to replace this with UV
disinfection.
c
0
V
Outfall Number ow.
Number . ., Outfall Number ,
Disinfection type
Sodium Hypochlorite -
t Seasons used
All
Dechlorination used? 0 Not applicable 0 Not applicable
pp 0 Not applicable
❑✓ Yes 0 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 0 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 4 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
discharges by outfall number or of the receiving water near the discharge points.
Outfall Number 001 Outfall Number Outfalli Number�,
Acute Chronic Acute Chronic Acute Chronic
Number of tests of discharge
water 1.5
Number of tests of receiving
water
3.13 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
0Yes 0 No 4 SKIP to Item 3.16.
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?
rw
✓❑ 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 0 No
3.16 Does one or more of the following conditions apply?
• The facility has a design flow greater than or equal to 1 mgd.
• The POTW has an approved pretreatment program or is required to develop such a program.
• The NPDES permitting authority has informed the POTW that it must sample for the parameters in Table C,must
sample other additional parameters(Table D),or submit the results of WET tests for acute or chronic toxicity for
each of its discharge outfalls(Table E).
❑ Yes 4 Complete Tables C, D,and E as
applicable. ❑ No 4 SKIP to Section 4.
3.17 Have you completed monitoring for all applicable Table C pollutants and attached the results to this application
package?
❑ Yes 0 No
3.18 Have you completed monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
attached the results to this application package?
❑ Yes ❑ No additional sampling required by NPDES
permitting authority.
EPA Form 3510-2A(Revised 3-19)
Page 8

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
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?
❑ Yes ❑ No 4 Complete tests and Table E and SKIP to
Item 3.26.
3.20_ Have you previously submitted the results of the above tests to your NPDES permitting authority?
❑ Yes ❑ No 4 Provide results in Table E and SKIP to
Item 3.26.
3.21 Indicate the dates the data were submitted to your NPDES permitting authority and provide a summary of the results.
Date(s)Submitted Summery of Results
(MMiD©/Y.YYY)
0
3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
toxicity?
0 Yes ❑ No 4 SKIP to Item 3.26.
I3.23 Describe the cause(s)of the toxicity:
3.24 Has the treatment works conducted a toxicity reduction evaluation?
0 Yes 0 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 •ermittin• authorit .
SECTION 4.INDUSTRIAL DISCHARGES AND HAZARDOUS WASTES(40 CFR 122.21(j)(6)and(7))
4.1 Does the POTW receive discharges from SIUs or NSCIUs?
❑ Yes ✓❑ No 4 SKIP to Item 4.7.
4.2 Indicate the number of SIUs and NSCIUs that discharge to the POTW.
Number of SIUsNumbbr of NSCIUs
4.3 Does the POTW have an approved pretreatment program?
❑ Yes ❑ No
4.4 Have you submitted either of the following to the NPDES permitting authority that contains information substantially
identical to that required in Table F:(1)a pretreatment program annual report submitted within one year of the
2 application or(2)a pretreatment program?
0 Yes ❑ No 4 SKIP to Item 4.6.
4.5 identify the title and date of the annual report or pretreatment program referenced in Item 4.4. SKIP to Item 4.7.
•
4.6 Have you completed and attached Table F to this application package?
Yes 0 No
EPA Form 3510-2A(Revised 3-19) Page 9

I EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040 0004
4.7 Does the POTW receive,or has it been notified that it will receive,by truck,rail,or dedicated pipe, any wastes that are
regulated as RCRA hazardous wastes pursuant to 40 CFR 261?
0 Yes ❑✓ No 4 SKIP to Item 4.9.
4.8 If yes,provide the following information:
Annual
Hazardous Waste Waste Transport Method Amount of Unite
Number (check all that apply) Waste
.. . .. .� .,....., .,... .. . _.,. fre ... ..... ... . ...
0 Truck 0 Rail
❑ Dedicated pipe ❑ Other(specify)
0
❑ Truck 0 Rail
4 ❑ Dedicated pipe ❑ Other(specify)
I ❑ Truck ❑ Rail
0 Dedicated pipe ❑ Other(specify)
4.9 Does the POTW receive,or has it been notified that it will receive,wastewaters that originate from remedial activities,
including those undertaken pursuant to CERCLA and Sections 3004(7)or 3008(h)of RCRA?
i
❑ Yes 0 No 4 SKIP to Section 5.
4.10 Does the POTW receive(or expect to receive)less than 15 kilograms per month of non-acute hazardous wastes as
specified in 40 CFR 261.30(d)and 261.33(e)?
❑ Yes 4 SKIP to Section 5. ✓❑ No
4.11 Have you reported the following information in an attachment to this application:identification and description of the
site(s)or facility(ies)at which the wastewater originates;the identities of the wastewater's hazardous constituents;and
the extent of treatment,if any,the wastewater receives or will receive before entering the POTW?
❑ Yes ✓❑ No
SECTION 5.COMBINED SEWER OVERFLOWS(40 CFR 122.21(j)(8))
5.1 Does the treatment works have a combined sewer system?
❑ Yes ❑✓ No+SKIP to Section 6.
f5.2 Have you attached a CSO system map to this application?(See instructions for map requirements.)
0 Yes 0 No
5.3 Have you attached a CSO system diagram to this application?(See instructions for diagram requirements.)
0 ❑ Yes ❑ No
EPA Form 3510-2A(Revised 3-19) Page 10

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
5.4 For each CSO outfall,provide the following information. (Attach additional sheets as necessary.)
CSO Outfall Number CSO OutfaII Number .. .... CSO Outten Number,...n. ..y
City or town
IState and ZIP code
0
gCounty
Latitude II "
, I
S Longitude °
u
Distance from shore ft. ft. ft.
i Depth below surface ft. ft. ft.
5.5 Did the POTW monitor any of the following items in the past year for its CSO outfalls?
CSO Outfall Number...,,. CSO Outfall Number CSO OUtfall mbe►
Rainfall 0 Yes 0 No ❑ Yes 0 No ❑ Yes ❑ No
I
0 CSO flow volume ElYes 0 No ElYes 0 No ElYes 0 No
sc
g CSO pollutant ❑ Yes 0 No 0 Yes 0 No ❑ Yes ❑ No
0 concentrations
C) Receiving water quality ❑ Yes ❑No ❑ Yes ❑ No 0 Yes 0 No
CSO frequency 0 Yes 0 No 0 Yes 0 No ❑ Yes ❑ No
Number of storm events ❑ Yes ❑ No 0 Yes 0 No ❑ Yes 0 No
5.6 Provide the following information for each of your CSO outfalls.
CSO Outfall Number„, CSO Outfall Number— CSO Outran Number,
y
Number of CSO events in
the past year events events events
o.
I* Average duration per hours hours hours
event 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
million gallons million gallons million gallons
Average volume per event
0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
i '
M nlmum rainfall causing inches of rainfall inche
s of rainfall inches of rainfall
a CSO event in last year 0 Actual or 0 Estimated 0 Actual or 0 Estimated ❑Actual or❑Estimated
EPA Form 3510-2A(Revised 3-19) Page 11

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
4952 NC0079057 Town of Manteo OMB No.2040-0004
5.7 Provide the information in the table below for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number. , CSO Outten Number_
Receiving water name
Name of watershed/
stream system
U.S. Soil Conservation ❑Unknown 0 Unknown ❑Unknown
Service 14-digit
.a watershed code
(if known)
Name of state
ii management/river basin
0 U.S.Geological Survey ❑Unknown 0 Unknown ❑Unknown
8-Digit Hydrologic Unit
Code(if known)
Description of known
water quality impacts on
receiving stream by CSO
(see instructions for
exam.les
SECTION 6.CIECKLIST AND CERTIFICATION STATEMENT(40 CFR IV.22(a)and(d))
6.1 In Column 1 below,mark the sections of Form 2A that you have completed and are submitting with your application.For
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 0 wl variance request(s) ✓❑ w/additional attachments
Information for All Applicants
0 Section 2:Additional 0 w/topographic map 0 wl process flow diagram
Information 0 w/additional attachments
0 w/Table A 0 w/Table D
• ❑ Section 3: Information on El Effluent Discharges w/Table B ❑ w/Table E
❑ w/Table C 0 w/additional attachments
,1g Section 4: Industrial 0 w/SIU and NSCIU attachments ❑ w/Table F
to ❑ Discharges and Hazardous
Wastes ❑ w/additional attachments
❑ Section 5:Combined Sewer 0 w/CSO map 0 w/additional attachments
LI
Overflows ❑ w/CSO system diagram
Section 6:Checklist and
❑ Certification Statement 0 wl attachments
6.2 Certification Statement
J
1 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
Joshua O'Brien
Water and Sewer Director
Signature / Date signed
76-
(-'4"-i----:— l0 1
EPA Form 3510-2A(Revised 3-19)
Page 12

EPA Identification Number I NPDES Permit Number
Facility Name Duffel!Number Form Approved 03105l19
4952 NC0079057
Town of Manteo 001 OMB No.2040-0004
TABLE A.EFFLUENT PARAMETERS FOR ALL POTWS
Pollutant Avery Daily DischargeAnaryficid ML orMDL
Value Units NumF r Method' (include units)
Biochemical oxygen demand
o
0 BOD5 or 0 CBOD5 7 mg/L
resort one 1.01 mg/L 104 SM 5210 B 2 mg/L ML
❑MDL
Enterococci 120 cfu/100 ml 1.25
cfu/100m1 104 EPA 1600 1 cfu ❑ML
Design flow rate
❑MDL
.627MGD .250 MGD
356
pH(minimum) 6.8 su
pH(maximum) 7.6 su
Temperature(winter) 22.1 C
16.7 C 103
Temperature(summer) 28.6 C
24.4 C 148
Total suspended solids(TSS) 3.8 -------
mg/L .03 mg/L 104 SM 2540 D 2.5 mg/L 0 ML
I 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 MDL
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 13

This page intentionally left blank.

EPA Identification Number NPDES Permit Number
� Facility Name Outfall Number Form Approved 03/05/19
4952 NC0079057
Town of Manteo OMB No.2040-0004
TABLE B.EFFLUENT PARAMETERS FOR ALL POTWS WITH A FLOW EQUAL TO OR GREATER THAN 0.1 MGD
PollutantMaximum Daily Discharge. Average Daily Discharge
Value Units Value Analytical ML or MIX
method' (include units)
Ammonia(as N) o mg/L
0 mg/L 104 5M4500 NH3 D 1 mgJL ❑ML
❑MDL
Chlorine
(total residual,TRC)2 14 ug/L .45 ug/L 156 10041 ULR 50 ug/L ❑ML
Dissolved oxygen 10.3 g ❑MDL
mg/L 8.43 mg/L 156 SM 4500 0 G 1 m JL o ML
0 ML
Nitrate/nitrite g ❑MDL
15.3 mg/L 6.89
mg/L 15 EPA 353.2 .02 mg/L ❑MDL
—
Kjeldahl nitrogen 1.5 mg/L
.87 mg/L 15 EPA 531.2 .5 mg/L ❑ML
Oil and grease g ❑MDL
❑ML
0 MDL
Phosphorus
ML
4.72 mg/L 2.2
mg/L 15 SM 4500 P(F-H) .04 mg/L 0 MDL -
Total dissolved solids
❑ML
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❑MDL
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 15

lilE'TOWN 11 p
OF
r�'Ii
PRESERVE Or PROSPER
Water and Sewer Department:
May 19, 2023
Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: DESCRIPTION OF SLUDGE MANAGEMENT PLAN
PERMIT No. NC0079057
Manteo WWTP
Dare County
Our sludge is wasted from our Secondary Clarifiers based on determination of MLSS, SVI, temp and other operational
factors. We closely monitor all lab results as well as fixed probes within our process units that communicate with our
SCADA system to make these decisions. The WAS is moved from our Clarifiers manually to an aerobic digester where it
is aerated for the appropriate amount of time based on the season for proper digestion of solids. When there is no
available volume left in the Digester,we turn the aerator off to allow the sludge to settle and are able to return a clear
supernatant back to the Headworks of the Treatment Plant. Once done with decanting,the aerator is returned to
working order. At the point that the sludge blanket in the Digester is too high that it effects the quality of supernatant,
we then move the thickened blanket to our Sludge Holding Lagoon for storage and further aeration and mixing.
We operate the Sludge Holding Lagoon in the same manner as the Digester for further digestion and thickening of solids.
When the Sludge Holding Lagoon has reached the appropriate percentage of solids, we stabilize the sludge by raising the
pH to above 12 standard units for 24 hours. Once the stabilization has been achieved,the sludge is hauled by truck and
land applied. The hauling is conducted by a contracted company as well as the land application of sludge.
Sincerely,
Josh O'Brien
Water and Sewer Director
Town of Manteo
PO Box 246
Manteo, NC 27954
[phone] (office)
[phone] (cell)
[e-mail]
1

Town of Manteo WWTP, NC 0079057
NPDES Sampling Results May 2020 through March 2023
Parameter: Monthly 200%
BODs TSS NH3-N Enterococci Limits:
Sampling date: Limt Threshold
05/04/20 0 0 0 0 BODs
05/06/20 0 0 0 2 (Apr. - Oct.) 5.0 mg/L 10.0 mg/L
05/11/20 2 0 0 0 BODs 10.0 mg/L 20.0 mg/L
05/13/20 0 0 0 0 (Nov. - Mar.)
05/19/20 0 0 0 4 TSS 30.0 mg/L 60.0 mg/L
05/21/20 0 0 0 10 NH3-N 2.0 mg/L 4.0 mg/L
05/26/20 0 0 0 17 (Apr. - Oct.)
05/28/20 0 0 0 15 NH3-N 4.0 mg/L 8.0 mg/L
06/01/20 0 0 0 14 (Nov. - Mar.)
06/03/20 0 0 0 15 Enterococci
06/08/20 0 0 0 1 35 / 100 mL 70/ 100 mL
(geo. mean)
06/10/20 0 0 0 31
1 06/15/20 0 0 0 0
06/18/20 0 0 0 0
06/22/20 0 0 0 0
06/24/20 0 0 0 1
06/29/20 0 0 0 0
07/01/20 0 0 0 0
07/06/20 0 0 0 0
07/08/20 0 0 0 2
07/13/20 0 0 0 0
07/15/20 0 0 0 2
07/20/20 0 0 0 12
07/22/20 0 0 0 2
07/27/20 0 0 0 2
07/29/20 0 0 0 0
08/03/20 0 0 0 1
08/06/20 0 0 0 4
08/10/20 0 0 0 2
08/12/20 0 0 0 1
08/17/20 0 0 0 3
08/19/20 0 0 0 5
08/24/20 0 0 0 1
08/26/20 0 0 0 0
08/31/20 0 0 0 1
09/02/20 0 0 0 4
09/08/20 0 0 0 1
09/10/20 0 0 0 16
09/15/20 0 0 0 3
09/17/20 0 0 0 2
09/21/20 0 0 0 0
09/23/20 0 0 0 0
PAGE 1 OF 8

Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
09/28/20 0 0 0 0 BODs
10/01/20 0 0 0 8 5.0 mg/L 10.0 mg/L
(Apr. - Oct.)
10/05/20 0 0 0 0 BODs 10.0 mg/L 20.0 mg/L
10/07/20 0 0 0 0 (Nov. - Mar.)
10/12/20 0 0 0 0 TSS 30.0 mg/L 60.0 mg/L
10/14/20 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
10/20/20 0 0 0 0 (Apr. - Oct.)
10/22/20 0 0 0 0 NH3-N
10/26/20 0 0 0 2 4.0 mg/L 8.0 mg/L
(Nov. - Mar.)
10/28/20 0 0 0 1 Enterococci 35 / 100 mL 70/ 100 mL
11/02/20 0 0 0 0 (geo. mean)
11/04/20 0 0 0 2
11/10/20 0 0 0 0
11/11/20 0
11/12/20 0 0 0 0
11/16/20 0 0 0 0
11/18/20 0 0 0 5
11/23/20 0 0 0 0
11/25/20 0 0 0 0
11/30/20 0 0 0 0
12/02/20 0 0 0 0
12/07/20 0 0 0 0
12/09/20 0 0 0 0
12/15/20 0 0 0 0
12/17/20 0 0 0 0
12/21/20 0 0 0 0
12/23/20 0 0 0 0
12/28/20 0 0 0 1
12/30/20 0 0 0 0
01/05/21 0 0 0 2
01/07/21 0 0 0 0
01/11/21 0 0 0 0
01/13/21 0 0 0 0
01/19/21 0 0 0 0
01/21/21 0 0 0 0
01/25/21 0 0 0 0
01/27/21 0 0 0 0
02/01/21 0 0 0 0
02/03/21 0 0 0 0
02/08/21 0 0 0 0
02/10/21 0 0 0 0
02/15/21 0 0 0 0
02/17/21 0 0 0 0 PAGE 2 OF8

•
Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
02/22/21 0 0 0 0 BODs 5.0 mg/L 10.0 mg/L
02/24/21 0 0 0 0 (Apr. - Oct.)
03/01/21 0 0 0 0 BODs 10.0 mg/L 20.0 mg/L
03/03/21 0 0 0 0 (Nov. - Mar.)
•
03/08/21 0 0 0.84 0 TSS 30.0 mg/L 60.0 mg/L
03/10/21 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
03/15/21 0 0 0 0 (Apr. - Oct.)
03/17/21 0 0 0 1 NH3-N
03/22/21 0 0 0 0 (Nov. - Mar.) 4.0 mg/L 8.0 mg/L
03/24/21 0 0 0 0 Enterococci
03/29/21 0 0 0 4 (geo. mean) 35 / 100 mL 70/ 100 mL
03/31/21 0 0 0 0
04/05/21 0 0 0 0
04/07/21 0 0 0 0
04/12/21 0 0 0 0
04/14/21 0 0 0 0
04/19/21 0 0 0 0
04/21/21 0 0 0 0
04/26/21 0 0 0 0
04/28/21 0 0 0 0
05/03/21 0 0 0 0
05/05/21 2 0 0 0
05/10/21 0 0 0 0
05/12/21 0 0 0 0
05/17/21 0 0 0 1
05/19/21 0 0 0 0
05/24/21 0 0 0 0
05/26/21 0 0 0 0
06/01/21 0 0 0 0
06/03/21 0 0 0 0
06/07/21 0 0 0 1
06/09/21 0 0 0 2
06/14/21 0 0 0 0
06/16/21 0 0 0 0
06/21/21 0 0 0 0
06/23/21 0 0 0 3
06/28/21 0 0 0 2
06/30/21 0 0 0 0
07/06/21 0 0 0 1
07/08/21 0 0 0 0
07/12/21 0 0 0 0
07/14/21 0 0 0 0
PAGE 3 OF 8

Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
07/20/21 0 0 0 0 BODs 5.0 mg/L 10.0 mg/L
07/22/21 0 0 1 3 (Apr. - Oct.)
07/26/21 3.5 0 0 0 BODs 10.0 mg/L 20.0 mg/L
07/28/21 0 0 0 1 (Nov. - Mar.)
08/02/21 0 0 0 42 TSS 30.0 mg/L 60.0 mg/L 1
08/04/21 2 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
08/09/01 0 0 0 1 (Apr. - Oct.)
08/11/21 2 0 0 2 NH3-N 4.0 mg/L 8.0 mg/L
08/16/21 0 0 0 4 (Nov. - Mar.)
08/18/21 0 0 0 1 Enterococci
08/23/21 0 0 0 1 (geo. mean) 35 / 100 mL 70/ 100 mL
08/25/21 0 0 0 0
08/30/21 0 0 0 0
09/01/21 0 0 0 0
09/07/21 0 0 0 0
09/09/21 0 0 0 0
09/13/21 0 0 0 11
09/15/21 0 0 0 0
09/20/21 2 0 0 1
09/22/21 0 0 0 0
09/27/21 2 0 0 3
09/29/21 2 0 0 1
10/04/21 0 0 0 0
10/06/21 2 0 0 0
10/11/21 0 0 0 0
10/13/21 0 0 0 0
10/18/21 2 0 0 1
10/20/21 0 0 0 0
10/25/21 2 0 0 0
10/27/21 2 0 0 0
11/01/21 2 0 0 3
11/03/21 0 0 0 0
11/08/21 0 0 0 0
11/10/21 2 0 0 1
11/15/21 2 0 0 0
11/17/21 2 0 0.4 0
11/22/21 0 0 0 0
11/24/21 2 0 0.3 0
11/29/21 0 0 0 0
12/01/21 2 0 0 0
12/06/21 0 0 0 0
12/08/21 0 0 0 4
PAGE 4 OF 8

Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
•
12/13/21 2 0 0 0 BODs 5.0 mg/L 10.0 mg/L
12 15 21 2 0 0 0 (Apr. - Oct.
12/20/21 0 0 0 0 BODs
10.0 mg/L 20.0 mg/L
12/22/21 0 0 0 0 (Nov. - Mar.)
12/27/21 0 0 0 1 TSS 30.0 mg/L 60.0 mg/L
12/29/21 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
01/03/22 2 0 0 43 (Apr. - Oct.) •
01/05/22 3 0 0 0 NH3-N 4.0 mg/L 8.0 mg/L
01/10/22 2 0 0 9 (Nov. - Mar.)
01/12/22 0 0 0 0 Enterococci
01/18/22 2 0 0 0 (geo. mean) 35 / 100 mL 70/ 100 mL
01/20/22 0 0 0 0
01/24/22 2 0 0 0
01/26/22 0 0 0 0
01/31/22 0 0 0 0
02/02/22 2 0 0 0
02/07/22 0 0 0 1
02/09/22 3 0 0 0
02/14/22 2 0 0 0
02/16/22 3 0 0 0
02/21/22 2 0 0 0
02/23/22 2 0 0 0
02/28/22 0 0 0 0
03/02/22 2 0 0 0
03/07/22 2 0 0 0
03/09/22 0 0 0 0
03/14/22 0 0 0 0
03/16/22 0 0 0 0
03/21/22 0 0 0 0
03/23/22 0 0 0 0
03/28/22 0 0 0 0
03/30/22 0 0 0 0
04/04/22 0 0 0 0
04/06/22 2 0 0 0
04/11/22 0 0 0 0
04/13/22 0 0 0 0
04/18/22 0 0 0 0
04/20/22 0 0 0 1
04/25/22 0 0 0 0
04/27/22 0 0 0 0
05/02/22 0 0 0 2
05/04/22 0 0 0 0
PAGE 5 OF 8

Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
05/09/22 0 0 0 0 BODs 5.0 mg/L 10.0 mg/L
05/11/22 2 0 0 0 (Apr. - Oct.)
05/16/22 0 0 0 1 BODs 10.0 mg/L 20.0 mg/L
05/18/22 0 0 0 0 (Nov. - Mar.)
05/23/22 0 0 0 3 TSS 30.0 mg/L 60.0 mg/L
05/26/22 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
05/31/22 0 0 0 0 (Apr. - Oct.)
06/02/22 0 0 0 0 NH3-N 4.0 mg/L 8.0 mg/L
06/06/22 0 0 0 0 (Nov. - Mar.) I
06/08/22 2 0 0 0 Enterococci 35 100 mL 70 100 mL
06/13/22 0 0 0 0 (geo. mean) / /
06/15/22 0 0 0 0
06/20/22 0 0 0 0
06/22/22 2 0 0 0
06/27/22 0 0 0 0
06/29/22 0 0 0 0
07/05/22 0 0 0 0
07/07/22 3 0 0 0
07/12/22 0 0 0 0
07/14/22 0 0 0 0
07/18/22 0 0 0 0
07/20/22 0 0 0 0
07/25/22 0 0 0 0
07/27/22 0 0 0 0
08/02/22 2 0 0 0
08/04/22 0 0 0 2
08/08/22 0 0 0 3
08/10/22 0 0 0 0
08/15/22 0 0 0 0
08/17/22 0 0 0 0
08/22/22 0 0 0 0
08/24/22 2 0 0 0
08/29/22 0 0 0 0
08/31/22 0 0 0 0
09/06/22 2 0 0 0
09/08/22 2 0 0 0
09/12/22 2 0 0 0
09/14/22 0 0 0 2
09/19/22 0 0 0 0
09/21/22 2 0 0 0
09/26/22 0 0 0 0
09/28/22 0 0 0 0
PAGE 6 OF 8
I

Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
10/03/22 2 0 0 8 BODs
5.0 mg/L 10.0 mg/L
10/05/22 3 0 0 4 (Apr. - Oct.)
10/10/22 0 0 0 0 BODs 10.0 mg/L 20.0 mg/L
10/12/22 2 0 0 0 (Nov. - Mar.)
10/17/22 0 0 0 0 TSS 30.0 mg/L 60.0 mg/L
10/19/22 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
10/24/22 0 0 0 0 (Apr. - Oct.)
10/26/22 2 0 0 0 NH3-N 4.0 mg/L 8.0 mg/L
10/31/22 2 0 0 120 (Nov. - Mar.)
11/02/22 2 0 0 0 Enterococci
11/07/22 0 0 0 0 (geo. mean) 35 / 100 mL 70/ 100 mL
11/09/22 4 0 0 0
11/14/22 0 0 0 1
11/16/22 3 0 0 1
11/21/22 0 0 0 0
11/23/22 2 0 0 0
11/28/22 2 0 0 0
11/30/22 2 0 0 0
12/05/22 0 0 0 0
12/07/22 7 0 0 0
12/12/22 2 0 0 0
12/14/22 2 0 0 0
12/19/22 0 0 0 0
12/21/22 0 0 0 0
12/27/02 0 0 3.8 0
12/29/22 2 0 0 0
01/03/23 0 0 0 0
01/05/23 2 0 0 0
01/09/23 3 0 0 0
01/11/23 4 0 0 0
01/17/23 3 0 0 2
01/19/23 2 0 0 0
01/23/23 4 0 0 6
01/25/23 3 0 0 0
01/30/23 2 0 0 0
02/01/23 7 0 0 0
02/06/23 0 0 0 0
02/08/23 0 0 0 60
02/14/23 0 0 0 0
02/16/23 0 0 0 0
02/20/23 2 0 0 0
02/22/23 3 0 0 0
PAGE 7 OF 8

t
I Town of Manteo WWTP, NC 0079057
NPDDES Sampling Results May 2014 through March 2017
Parameter: Monthly 200%
Limits:
Sampling date BODs TSS NH3-N Enterococci Limt Threshold
02/27/23 2 0 0 0 BODs 5.0 mg/L 10.0 mg/L
03/01/23 2 0 0 0 (Apr. - Oct.)
03/06/23 0 0 0 0 BODs 10.0 mg/L 20.0 mg/L
03/08/23 0 0 0 0 (Nov. - Mar.)
03/13/23 2 0 0 0 TSS 30.0 mg/L 60.0 mg/L
03/15/23 0 0 0 0 NH3-N 2.0 mg/L 4.0 mg/L
03/20/23 0 0 0 0 (Apr. - Oct.)
03/22/23 0 0 0 0 NH3-N 4.0 mg/L 8.0 mg/L
03/27/23 2 0 0 0 (Nov. - Mar.)
03/29/23 0 0 0 0 Enterococci
35/ 100mL 70/ 100mL
(geo. mean)
PAGE8OF8

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r�r,R. 1 `a; PROCESS FLOW DIAGRAM
w FILTER of , fF''_ 1°` . ,�� \,`` This diagram shows an overview of the Town's
"" FILTER I I `- AERATION c.iw ' wastewater treatment plant including all valves,
' `,' e ' �',, lines and bypass piping. Flow patterns are illustrated
-__� . _-W C 1 1 l with arrows on the appropriate lines. Emergency standby
0 r LD r A power is located next to the operations building with an
***Annual Average Daily x- DISTRIOIJTION ; I - automatic transfer switch located in the electrical control
RETURN pox .1
Flow Rate (effluent): P
i .,.. room that powers essential process units during a power
256 mgd outage. The WWTP is monitored with a SCADA system
that monitors 24 hours a day all units as well as
operational control for several plant processes.
***Annual Average Daily ***NOTE: The only flow meters installed
Flow Rate (RAS): at the WWTP between process
.390 mgd units or outfalls are the RAS flow
meter and the effluent flow meter
which are shown on this profile.
(Flows provided on this diagram represent a running year average
from May 2022 through April 2023)