NC0023973_Renewal (Application)_20220512

tN STATE
d W.r 7k, 4 ,
ROY COOPER`" oS
Governor
ELIZABETH S.BISER xrtk^'want°
Secretary ` QW M N
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
May 12, 2022
Cape Fear Public Utility Authority
Attn: Kenneth Waldroup, Executive Dir.
235 Government Center Dr
Wilmington, NC 28403
Subject: Permit Renewal
Application No. NC0023973
Wilmington Southside WWTP
New Hanover County
Dear Applicant:
The Water Quality Permitting Section acknowledges the May 12, 2022 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://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,
Wren edford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
North Carol Departmnt of Enl Quality I on of er
Wilmington Regionalina Officee 1127Cardlnalvironmenta Drive ExtensionDivisi I WllmingtoWatn.NoResourcesrth Carollna28405
� 4�+D 910.796.7215

MI Cape Fear
Public Utility Authority
Stewardship.Sustainabllity.Service.
May 9, 2022 RECEIVED
Gary Perlmutter i;ii:\Y 1 2 2022
NC DENR—Division of Water Resources—NPDES Permitting
1617 Mail Service Center NCDEQIDWRINPDES
Raleigh, NC 27699-1617
•
Re: Renewal Application— NPDES Permit NC0023973
M'Kean Maffitt (Southside) Wastewater Treatment Plant
Cape Fear Public Utility Authority(CFPUA)
New Hanover County, North Carolina
Dear Mr. Perlmutter:
NPDES Permit NC0023973 for CFPUA's Southside WWTP expires on November 30, 2022, and the
renewal application is due to DWR no later than June 3, 2022. To fulfill this deadline and provide time
for processing prior to expiration, the necessary NPDES permit renewal application is attached. It
consists of the following components:
1. NPDES Form 2A Basic Application
2. NPDES Form 2A Supplemental Application, Parts D, E, and F and supplemental notes
3. Chemical Addendum disclosure form as required by Session Law 2018-5, Senate Bill 99,Section
13.1(r) and supplemental attachment of additional pollutants
4. Topographic Map
5. Southside WWTP Existing Site Plan and Expanded Capacity Plan
6. Southside WWTP Process Flow Diagrams for 12, 16, 20, and 24 MGD with Narrative
7. Southside WWTP Major Equipment List
8. Sludge Management Plan
9. Exceptional Compliance Data Summary for maintaining monitoring reduction
Monitoring reductions at this facility for CBOD, TSS, and Enterococci began in September 2013 due to
meeting NCDENR's criteria for exceptional compliance, which includes:
• This facility has had no civil penalty assessments for permit limit violations for each of the three
target parameters during the past three years.
• Neither CFPUA nor CFPUA employees have been convicted of criminal violations of the Clean
Water Act within the past five years.
• This facility is not currently under an SOC for effluent limit noncompliance for the three target
parameters.
• The North Carolina and ECHO database interface results in incorrect recording of data at times.
There have been no violations at the Southside WWTP in the past three years for limits or
monitoring frequency requirements, so violations listed in ECHO are in error.
• As demonstrated in the attached data summary, the three-year arithmetic means of effluent
data for CBOD5 and TSS is less than 50 percent of the monthly average permit limit for each of

the parameters. The three-year geometric mean of effluent data for Enterococci is also less
than fifty percent of the monthly geometric mean permit limit.
• No daily sampling results during the three-year period are over 200 percent of the monthly
average limit for CBOD5 or TSS.
• Only two daily sampling results are over 200 percent of the weekly average limit for Enterococci.
• There have been no weekly average limit violations or monthly average limit violations for
CBOD5.TSS or Enterococci during the past three years.
• A reduction in effluent monitoring for this facility should not impair DWQ's assessment of
downstream uses. The consistency of our data over the three-year period supports that a
reduction in the frequency of monitoring should provide sufficient data to evaluate the water
quality of our discharge.
The Southside WWTP has maintained its exceptional compliance record and requests that the
monitoring reduction stay in force through this next permitting cycle.
The Southside WWTP permit modification includes phased capacity expansions and treatment upgrades
for design flows of 16, 20,and 24 MGD. The schedules for these improvements are included in Section
2.6 of the attached NPDES permit application for renewal,the first of which is scheduled to begin
construction in FY 2025 during this next permit cycle. Although these expansions will result in a higher
volume of wastewater being discharged into the Lower Cape Fear River,the treatment processes will be
upgraded to include advanced tertiary treatment. These improvements will ultimately result in a higher
quality effluent discharge from this facility. A Finding of No Significant Impact was submitted in October
2013 prior to the approval and issuance of this phased permit. Additional permits and Authorization to
Construct(ATC) will be obtained prior to beginning the first expansion. CFPUA requests the phased-in
permits remain in effect through this next permit cycle to enable CFPUA to move forward in a timely
manner to effectively address the needs of the community without compromising effluent quality.
Changes since the last NPDES permit renewal:
1. Replaced chlorine feed with UV disinfection
The Southside WWTP has eliminated the chlorine feed and began disinfection via a new dual UV
disinfection system with each channel capable of treating 15 MGD peak hourly flow. An ATC was
issued by NCDEQ on October 9, 2018, and an Engineer's Certification was submitted upon
construction completion to NCDEQ on May 14, 2020, by Anthony W. Boahn, P.E. CFPUA has
incorporated UV disinfection into the NPDES permit renewal application in Section 3.9, as
appropriate.
2. Advanced the Southside WWTP upgrade and expansion project
CFPUA has also advanced the planned upgrade and expansion of the Southside WWTP from starting
construction in FY 2031 to FY 2025.
3. Addition of an NPDES Copper discharge limit
The NPDES permit issued in March 2018 included a new copper limit for the Southside discharge. It
also included a schedule of compliance to allow time to investigate paths to compliance with a
compliance deadline of March 1, 2022. This deadline has since been extended to November 29,
2022,to coincide with the end of the current permit cycle. As part of this renewal, CFPUA is
requesting an extension into this next permit cycle to further investigate, permit,design, construct,

and implement one of two options: 1)a chemical coagulation process addition or 2) an outfall
diffuser into the navigational channel of the Lower Cape Fear River.
4. Copper Removal Investigations
As noted in each of the annual reports submitted to NCDEQ and the ongoing discussions between
NCDEQ and CFPUA, staff have been working several parallel paths towards compliance throughout
this permit cycle. These paths have included:
• Increased monitoring within the plant to evaluate total and dissolved copper in the wastewater
and recycle streams to try to maximize treatment efficiencies as much as possible.
• Monitoring in the collection system for both total and dissolved copper and customer water
usage to identify potential single source control points for permitting and reduction of influent
copper.
• Optimization of the public water supply corrosion control system in the northern portion of the
service area and addition of corrosion control in the public water system serving the southern
portion of the service area.
• A dilution study to determine the mixing zones as they relate to chronic and acute copper
standards.
• An investigation and preliminary evaluation of a site-specific copper criteria Water Effects Ratio.
• Initiation of planning for and preliminary design of a diffuser and outfall line into the Cape Fear
River to eliminate the side stream discharge.The first step is to begin the permit coordinating
process to determine the likelihood of receiving an ATC from all vested agencies.
• Jar and pilot testing of chemical coagulation for removal of copper from the wastewater
treatment effluent.
The following paragraphs discuss these actions in greater detail.
Plant Optimization
Staff continues to evaluate operational practices to determine if in-plant changes can be made to
optimize copper removal without affecting the efficiencies of other treatment processes. This facility is
a secondary treatment facility with trickling filters and is not designed for maximizing removal of
compounds such as copper. Despite best efforts, the effluent total copper concentration has remained
above the daily maximum permit limit of 5.8 ug/L for most of the year. Over the past several years, staff
have been able to adjust the treatment process during the warm summer months to achieve compliance
with the daily maximum most of the time. However,these operational changes are not sustainable
year-round. As the weather cools, copper-removal efficiencies decline. Compliance with the monthly
average of 3.7 ug/L has been achieved occasionally, but not consistently. Treatment optimization will
continue but will not result in consistent compliance with the established NPDES permit limits.
Source Investigations
CFPUA has been unable to identify any single source or isolate an area of consistent higher contributions
of copper. Data reviews and increased monitoring of the influent and effluent, as well as collection
system sampling at various pump stations, have not pinpointed any specific sources of copper to target
for permitting and reduction in the influent concentration to the Southside WWTP. The data continues
to show no consistent copper correlation between the influent and effluent highs and lows, rainfall, nor
the peaks in individual outfall lines.

Corrosion Control Optimization
Service areas that discharge to the Southside WWTP receive drinking water from two separate water
systems. The northern service area receives water from the Sweeney Water Treatment Plant. The
southern portion of the service area receives water from the Monterey Heights groundwater well
system. A review of collection system data and the periodic Lead and Copper monitoring identified
customers' in-home plumbing in these systems as a potential source of copper. Both systems have been
very effective at maintaining levels of both lead and copper well below drinking water standards.
However, a review of the levels in the drinking water testing indicates that even though copper levels
are very low compared to drinking water standards,the levels at some customers' homes are higher
than the limits imposed at the wastewater treatment facility. Therefore, CFPUA determined both its
water and wastewater customers can be better served by optimizing the corrosion inhibitor in the
Sweeney water system and by adding orthophosphate corrosion inhibitor to the finished water in the
Monterrey Heights groundwater system.
In the Sweeney water system, staff optimized its corrosion control processes. In early summer 2021,
staff switched from a 50:50 ortho:poly-phosphate blend corrosion inhibitor to a 70:30 blend and began
increasing the orthophosphate dosage from 0.8 mg/L to 1.0 mg/L. This blend has a higher percentage of
orthophosphate,the portion of the phosphate that provides the coating on the plumbing and inhibits
leaching of copper. CFPUA has also invested over$85,000 to install corrosion control chemical feed
systems at the seven wells that serve Monterey Heights groundwater customers. The systems were
activated and began feeding 70:30 polyphosphate blend in early May 2021. Due to the complex nature
of the chemical corrosion inhibitor and its potential interaction with the natural barrier that has built up
over the years,the feed rate was slowly increased from an initial feed rate of 0.6 mg/L to 1.4 mg/L. The
slow increases prevented abrupt changes in water chemistry that could degrade water quality. The
target orthophosphate residual in the system was 1.0 mg/L. By mid-August, monitoring in the
distribution system indicated the orthophosphate levels were consistent. Based on weekly monitoring
of the influent copper levels at the Southside WWTP during this change,the total copper levels have
maintained a slight downward trend since these measures began in 2021. However,the decrease has
not been impactful enough to enable sustained NPDES compliance with the copper limits.
Dilution Study
CFPUA invested over$35,000 into a mixing analysis to determine an appropriate dilution factor for the
Southside's discharge into the Lower Cape Fear River, but this option has not provided a route to
sustained compliance for CFPUA. Due to the near field mixing of a side stream discharge,the dilution
study resulted in a less than 2:1 dilution and would not result in limits that would support compliance
for the facility. These results have prompted further multi-agency discussions regarding the potential
for a diffuser discharge out into the navigational channel of the Lower Cape Fear River.
Water Effects Ratio Study
CFPUA invested approximately$40,000 to pursue a potential site-specific copper criterion via a water
effects ratio (WER). Tetra Tech, CFPUA's consultant, CFPUA, NCDEQ, EPA, and various other partners
have discussed the protocols for a copper WER in this estuarine environment. These discussions
included the critical conditions that would be considered for development of a WER and the appropriate
species to be used given the estuarine waters. CFPUA has evaluated a pilot study using the agreed-upon
methodology and species. Based on discussions with NCDEQ and our consultants, CFPUA decided to not
pursue this path for achieving compliance.

Diffuser Feasibility Investigations
CFPUA's preliminary work with Tetra Tech, McKim &Creed, NCDEQ,and several other agencies
regarding the installation of a diffuser in the Lower Cape Fear River along the navigational channel side
of the island across from Southside's current discharge location is another path that has and continues
to be explored. To date several multi-agency meetings have occurred, preliminary modeling has been
completed, and approximately$60,000 has been spent investigating the feasibility of this option. The
full design and construction of a diffuser is anticipated to cost millions of dollars. It will also take a
substantial amount of time to permit and construct in this environmentally sensitive area that is a
navigational channel for large container ships,the U.S. Coast Guard, and a playground for general
recreational activities. CFPUA is continuing to work with our consultants to further explore this option.
Remaining steps include completion of an optimal diffuser design, request of speculative limits for the
revised outfall design, preparation of a supplement to existing environmental assessment, and a CAMA
permit application. All of which would need to be completed and approved prior to requesting an ATC
to move forward with this option.
Chemical Coagulation
The last option has been the addition of a chemical coagulant to substantially remove the copper in the
treatment process. Staff have worked with two chemical suppliers and performed three bench scale
analyses of eleven different chemicals in various concentrations. These analyses have indicated several
of the chemicals may be an option for achieving compliance with the NPDES permit limits. Staff have
chosen a product, USALCO's DeIPAC 2450, to perform a full-scale pilot test at the Southside WWTP.
Using temporary storage tanks, the first of several trials of the full-scale pilot ran from February 7 to 15,
2022,followed by a longer trial with varying dosages from March 14 to April 7, 2022. Due to the
variations in treatment efficiencies throughout the year, staff is planning to operate the pilot test for
several weeks in the late spring and summer months to evaluate the effectiveness of the coagulant
during these various conditions. Thus far, the chemical coagulant was consistently effective at the
higher dosage of around 80 mg/L, but less effective as the dosage was reduced to 40 and 60 mg/L. Staff
are evaluating the overall impact to the processes, including any unintended consequences such as
declining treatment efficiencies for other parameters,toxicity, solids increase, dewatering processes,
and associated cost constraints.
Next Steps
The two options CFPUA is continuing to pursue are the chemical coagulation and the outfall diffuser.
Both will take additional time to assess and implement beyond the November 29, 2022 compliance
deadline set in the compliance schedule. For the chemical coagulation option, CFPUA is requesting an
extension into this next permit cycle. This extension will enable CFPUA to complete the full-scale pilot,
determine the best option for copper treatment, design a permanent chemical storage and feed system,
obtain an ATC, bid, construct, perform startup testing, and begin optimization of the system for
compliance.
If the chemical coagulation option does not achieve sustained compliance, CFPUA would then request
additional time to design, permit, and construct the outfall diffuser option. The outfall diffuser option, if
feasible, is anticipated to cost millions of dollars and will take several years to implement. It is worth
noting that CFPUA's 10-year Capital Improvement Plan (CIP) includes a $150 million planned upgrade
and expansion of the Southside WWTP starting construction in FY 2025. Constructing the diffuser outfall
ahead of the design and construction of the actual treatment plant upgrade would be inefficient and risk
additional expense to our customers. CFPUA is currently spending more than$46 million on

unanticipated water treatment upgrades to address PFAS contamination in the Cape Fear River for
protection of the public health. These same customers would be expected to cover the duplication of
cost of the diffuser outfall in advance of the Southside WWTP upgrade and expansion.
The most effective and efficient option for CFPUA, our ratepayers and the Lower Cape Fear River
ecosystem would be to extend the compliance schedule in the next permit cycle to align with the 10-
year CIP. CFPUA would incorporate the outfall diffuser into the overall plant upgrade project at that
time. The upgrade and expansion include tertiary treatment processes, which will result in improved
removal efficiencies and higher quality effluent, enabling CFPUA to comply with the existing permit limit
as well as the future limits. Once the expansion is complete, the limits will be reduced by half due to a
discharge into "High Quality Waters". Furthermore, if authorized by all vested agencies, the removal of
the side stream discharge and inclusion of an outfall diffuser will improve mixing within the discharge
area.
As demonstrated by our efforts to date, CFPUA is committed to work with NCDEQ to develop the best
plan possible for achieving copper compliance for the Southside WWTP. An extension of the compliance
schedule as a part of this NPDES permit renewal will allow CFPUA to continue its determined path to
copper compliance.
We appreciate the assistance NCDEQ has provided as staff have been working through these options,
and we look forward to continuing to work with you on this process. Please let me know if there are any
questions or whether this application is deemed complete. If all considerations are otherwise in order,
we await receipt of a draft permit and compliance schedule for review.
Sincerely,
14) Z)r-itVer(5 )
Kenneth Waldroup, P.E.
Executive Director, Cape Fear Public Utility Authority
Cc: Julie Grybz, NCDEQ
Michael Montebello, NCDEQ
Morella Sanchez, NCDEQ
Tom Tharrington, NCDEQ
Carel Vandermeyden, CFPUA
Beth Eckert, CFPUA
Matt Hourihan, CFPUA
Steve Styers, CFPUA

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
2A 4"/EPA 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
M'Kean Maffitt(Southside)WWTP
Mailing address(street or P.O.box)
235 Government Center Drive
City or town State ZIP code
o Wilmington NC 28403
Contact name(first and last) Title Phone number Email address
Milton Vann Wastewater Treatment Super' [phone] [e-mail]
Location address(street,route number,or other specific identifier) ❑ Same as mailing address
co 3436 River Road
u_
City or town State ZIP code
Wilmington NC 28412
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?
O Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
Cape Fear Public Utility Authority
= Applicant address(street or P.O.box)
235 Government Center Drive
City or town State ZIP code
Wilmington NC 28403
Contact name(first and last) Title Phone number Email address
4.3
a Kenneth Waldroup Executive Director [phone] [e-mail]
1.4 Is the applicant the facility's owner,operator,or both?(Check only one response.)
❑ Owner ❑ Operator El Both
1.5 To which entity should the NPDES permitting authority send correspondence?(Check only one response.)
El Facility ❑ 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.)
Existing Environmental Permits
❑ NPDES(discharges to surface ❑ RCRA(hazardous waste) ❑ UIC(underground injection
water) control)
NC0023973
o ❑ PSD(air emissions) ❑ Nonattainment program(CAA) ❑ NESHAPs(CM)
NC-07533R09
y ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 0 Other(specify)
404)
Land Application Class A&B
EPA Form 3510-2A(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
1.7 Provide the collection system information requested below for the treatment works.
Municipality Population Collection System Type
Served Served (indicate percentage) Ownership Status
100 %separate sanitary sewer 0 Own 0 Maintain
City of 43,488 %combined storm and sanitary sewer ❑ Own 0 Maintain
Wilmington ❑ Unknown 0 Own 0 Maintain 1
c 100 %separate sanitary sewer El Own 0 Maintain
New Hanover 22,948 %combined storm and sanitary sewer 0 Own 0 Maintain
County ❑ Unknown 0 Own 0 Maintain
a %separate sanitary sewer 0 Own 0 Maintain
c %combined storm and sanitary sewer 0 Own 0 Maintain
co 0 Unknown 0 Own 0 Maintain
q; %separate sanitary sewer 0 Own 0 Maintain
cn %combined storm and sanitary sewer 0 Own 0 Maintain
0 Unknown 0 Own 0 Maintain
co
Total
w Population 66,436
0 Served
Separate Sanitary Sewer System Combined Storm and
Sanitary Sewer
Total percentage of each type of ° °
/o
sewer line(in miles) Zoo /0
1.8 Is the treatment works located in Indian Country?
o ❑ Yes El No
0
co 1.9 Does the facility discharge to a receiving water that flows through Indian Country?
c ❑ Yes El No
1.10 Provide design and actual flow rates in the designated spaces. Design Flow Rate
12 mgd
_ Annual Average Flow Rates(Actual)
Two Years Ago Last Year This Year
co
cts
c 7.002 mgd 7.412 mgd 7.561 mgd
• `L Maximum Daily Flow Rates(Actual)
o Two Years Ago Last Year This Year
14.714 mgd 12.70 mgd 11.918 mgd
u) 1.11 Provide the total number of effluent discharge points to waters of the United States by type.
o Total Number of Effluent Discharge Points by Type
CL T Constructed
En 1—. Treated Effluent Untreated Effluent Combined SewerCD Bypasses Emergency
Overflows Overflows
u)
—.— — —
o I 1 o 0 0 0
EPA Form 3510-2A(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
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 and associated discharge information in the table below.
Surface Impoundment Location and Discharge Data
Average Daily Volume Continuous or Intermittent
Location Discharged to Surface
Impoundment (check one)
❑ Continuous
gpd ❑ Intermittent
❑ Continuous
gpd ❑ Intermittent
❑ Continuous
gpd ❑ Intermittent
-o
2 1.14 Is wastewater applied to land?
❑ Yes 0 No 4 SKIP to Item 1.16.
c 1.15 Provide the land application site and discharge data requested below.
H Land Application Site and Discharge Data
o Continuous or
`o Average Daily Volume
Location Size A lied Intermittent
pp (check one)
= acresgpd 0 Continuous
o ❑ Intermittent
d 0 Continuous
acres
o gp ❑ Intermittent
-o 0 Continuous
R acres gpd 0 Intermittent
73 1.16 Is effluent transported to another facility for treatment prior to discharge?
o ❑ Yes ❑✓ 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.
Transporter 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
EPA Form 3510-2A(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
1.20 In the table below,indicate the name,address,contact information,NPDES number,and average daily flow rate of the
receiving facility.
Receiving Facility Data
-0 Facility name Mailing address(street or P.O.box)
City or town State ZIP code
0
Contact name(first and last) Title
0
Phone number Email address
0.
NPDES number of receiving facility(if any) 0 None Average daily flow rate mgd
c 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)?
s ❑ Yes ❑ No 5 SKIP to Item 1.23.
o 1.22 Provide information in the table below on these other disposal methods.
Information on Other Disposal Methods
o Disposal Location of Size of Annual Average Continuous or Intermittent
Method Disposal Site Disposal Site Daily Discharge (check one)
A Description Volume
Ta"
acres gpd ❑ Continuous
❑ Intermittent
❑ Continuous
acres gpd ❑ Intermittent
acres gpd ❑ Continuous
❑ Intermittent
itt nt
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.
cn y Consult with your NPDES permitting authority to determine what information needs to be submitted and when.)
R 3 Discharges into marine waters(CWA Water quality related effluent limitation(CWA Section
❑ Section 301(h)) ❑ 302(b)(2))
❑Q 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 Information
Contractor 1 Contractor 2 Contractor 3
0
Contractor name
(company name)
o Mailing address
(street or P.O.box)
City,state,and ZIP
code
cContact name(first and
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
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
SECTION 2.ADDITIONAL INFORMATION(40 CFR 122.21(j)(1)and(2))
c Outfalls to Waters of the United States
2.1 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
o ❑✓ Yes ❑ 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
';� and infiltration.
1,512,200 gpd
Indicate the steps the facility is taking to minimize inflow and infiltration.
Ongoing sewer maintenance program and continuing efforts to identify and correct excessive I&I problems
3
0
2.3 Have you attached a topographic map to this application that contains all the required information?(See instructions for
0.
specific requirements.)
ta
0- ❑✓ Yes ❑ No
E 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.)
EC c ❑✓ Yes ❑ No
2.5 Are improvements to the facility scheduled?
El Yes 0 No 4 SKIP to Section 3.
Briefly list and describe the scheduled improvements.
is 1. Upgrade and expansion with phased design flow of 16 mgd,20 mgd,and 24 mgd capacity. 16 mgd capacity.
as
E
2. Upgrade and expansion with phased design flow of 16 mgd,20 mgd,and 24 mgd capacity. 20 mgd capacity.
w
0
a) 3. Upgrade and expansion with phased design flow of 16 mgd,20 mgd,and 24 mgd capacity. 24 mgd capacity.
m
cc) 4.
2.6 Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
Affected Attainment of
Scheduled Begin End Begin
> Outfalls Operational
2 Improvement Construction Construction Discharge
(from above) (list outfall (MM/DD/YYYY) (MM/DD/YYYY) (MMIDD/YYYY) Level
number) (MM/DD/YYYY)
1. 001 01/01/2025 12/31/2029 12/31/2029 12/31/2029
-o
N 2. 001 12/31/2034 12/31/2039 12/31/2039 12/31/2039
3. 001 12/31/2041 12/31/2044 12/31/2044 12/31/2044
4.
2.7 Have appropriate permits/clearances concerning other federal/state requirements been obtained?Briefly explain your
response.
❑✓ Yes 0 No 0 None required or applicable
Explanation:
A Finding of No Significant Impact per NCGS 113A-1,et seq was received in October 2013.Remaining permits will be
received nrinr to the rnmmenrina the nhaced exnancinnc
EPA Form 3510-2A(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
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 North Carolina
H
13 County New Hanover
0 City or town Wilmington
s Distance from shore N/A ft. ft. ft.
0.
Depth below surface N/A ft. ft. ft.
Average daily flow rate 7.561 mgd mgd mgd
Latitude 34° 09' 56"
Longitude 77° 56' 56"
3.2 Do any of the outfalls described under Item 3.1 have seasonal or periodic discharges?
o ❑ Yes ❑ No 4 SKIP to Item 3.4.
3.3 If so,provide the following information for each applicable outfall.
H Outfall Number Outfall Number Outfall Number
Number of times per year
0 discharge occurs
a Average duration of each
discharge(specify units)
cAverage flow of each mgd mgd mgd
discharge
CO
in Months in which discharge
occurs
3.4 Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes 0 No 4 SKIP to Item 3.6.
3.5 Briefly describe the diffuser type at each applicable outfall.
0.
Outfall Number Outfall Number Outfall Number
fq
u• 5 3 6 Does the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
discharge points?
• w ❑ Yes ❑ No 4SKIP 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
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
3.7 Provide the receiving water and related information(if known)for each outfall.
Outfall Number 001 Outfall Number Outfall Number
Receiving water name Cape Fear River
Name of watershed,river,
c or stream system DWR Sub-basin 03-06-17
c U.S.Soil Conservation
Service 14-digit watershed 03030005050010
code
CD Name of state Cape Fear
management/river basin
U.S.Geological Survey
cp 8-digit hydrologic 03030005
cataloging unit code
Critical low flow(acute) Tidal cfs cfs cfs
Critical low flow(chronic) Tidal cfs cfs cfs
Total hardness at critical mg/L of mg/L of mg/L of
low flow 26 CaCO3 CaCO3 CaCO3
3.8 Provide the following information describing the treatment provided for discharges from each outfall.
Outfall Number 001 Outfall Number Outfall Number
Highest Level of 0 Primary 0 Primary 0 Primary
Treatment(check all that 0 Equivalent to 0 Equivalent to 0 Equivalent to
apply per outfall) secondary secondary secondary
El Secondary 0 Secondary 0 Secondary
❑ Advanced 0 Advanced 0 Advanced
❑ Other(specify) 0 Other(specify) 0 Other(specify)
0
o Design Removal Rates by
Outfall
b)
BOD5 or CBOD5 85
1°i TSS 85 %
0 Not applicable 0 Not applicable 0 Not applicable
Phosphorus % o 0
Not applicable 0 Not applicable 0 Not applicable
Nitrogen
/o /o
Other(specify) 0 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
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
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.
d
0
U
Outfall Number Outfall Number Outfall Number
e- Disinfection type
uv
N
• Seasons used
uv
Dechlorination used? ID 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?
O 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 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 o01 Outfall Number Outfall Number
Acute Chronic Acute Chronic Acute Chronic
Number of tests of discharge 17
water _
Number of tests of receiving
water
3.13 Does the treatment works have a design flow greater than or equal to 0.1 mgd?
❑ Yes ❑ No 4 SKIP to Item 3.16.
0 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.
cp
3.15 Have you completed monitoring for all applicable Table B pollutants and attached the results to this application
package?
El Yes ❑ 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. ElNo 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?
El Yes ❑ 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
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
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?
No 4 Complete tests and Table E and SKIP to
ElYes ❑ Item 3.26.
3.20 Have you previously submitted the results of the above tests to your NPDES permitting authority?
0 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 Summary of Results
(MM/DD/YYYY)
See Table E
m
c
0
co 3.22 Regardless of how you provided your WET testing data to the NPDES permitting authority,did any of the tests result in
o toxicity?
❑ Yes 0 No 4 SKIP to Item 3.26.
F3.23 Describe the cause(s)of the toxicity:
C
d
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?
Not applicable because previously submitted
ElYes ❑ information to the NPDES sermittin• authori .
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?
El Yes El No 4 SKIP to Item 4.7.
d 4.2 Indicate the number of SIUs and NSCIUs that discharge to the POTW.
Number of SIUs Number of NSCIUs
1
0
2 4.3 Does the POTW have an approved pretreatment program?
_ 0 Yes El No
g 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
application or(2)a pretreatment program?
ElYes ❑ No 4 SKIP to Item 4.6.
Tp 4.5 Identify the title and date of the annual report or pretreatment program referenced in Item 4.4.SKIP to Item 4.7.
Cape Fear Public Utility Authority 2021 Pretreatment Annual Report submitted February 16,2022.
4.6 Have you completed and attached Table F to this application package?
❑ Yes ❑ No
EPA Form 3510-2A(Revised 3-19) Page 9

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 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?
❑ Yes ❑ No SKIP to Item 4.9.
4.8 If yes,provide the following information:
Annual
Hazardous Waste Waste Transport Method Amount of Units
Number (check all that apply) Waste
Received
❑ Truck 0 Rail
a ❑ Dedicated pipe ❑ Other(specify)
O
U
❑ Truck 0 Rail
❑ Dedicated pipe ❑ Other(specify)
O
N ❑ Truck 0 Rail
❑ Dedicated pipe ❑ Other(specify)
111
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?
❑ Yes ❑ No 4 SKIP to Section 5.
N 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. 0 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?
O Yes ❑ No
SECTION 5.COMBINED SEWER OVERFLOWS(40 CFR 122.21(j)(8))
5.1 Does the treatment works have a combined sewer system?
ra
❑ Yes ID No 4SKIP to Section 6.
5.2 Have you attached a CSO system map to this application?(See instructions for map requirements.)
a ❑ Yes ❑ No
0 5.3 Have you attached a CSO system diagram to this application?(See instructions for diagram requirements.)
❑ Yes ❑ No
EPA Form 3510-2A(Revised 3-19) Page 10

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
5.4 For each CSO outfall,provide the following information.(Attach additional sheets as necessary.)
CSO Outfall Number CSO Outfall Number 1 CSO Outfall Number
City or town
0
w
•a State and ZIP code
0
N
o County
c
Latitude °
0
0 °
U
Longitude 0
Distance from shore ft. ft. ft.
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 Number
Rainfall ❑Yes 0 No ❑ Yes ❑No ❑ Yes ❑No
0) .
c
`0 CSO flow volume 0 Yes ❑No ❑ Yes ❑No ❑ Yes ❑No
CSO pollutant ❑ Yes 0 No ❑ Yes 0 No ❑ Yes 0 No
o concentrations
co
C' Receiving water quality 0 Yes ❑No ❑Yes ❑No ❑ Yes 0 No
CSO frequency ❑ Yes ❑ No ❑ Yes 0 No ❑ Yes ❑ No
Number of storm events ❑ Yes ❑ No ❑ Yes ❑ No 0 Yes ❑No
5.6 Provide the following information for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
co
Number of CSO events in events events events
o' the past year
0
Average duration per hours hours hours
c event ❑Actual or 0 Estimated 0 Actual or❑Estimated 0 Actual or 0 Estimated
d
o Average volume per event million gallons million gallons million gallons
c> 0 Actual or 0 Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
Minimum rainfall causing inches of rainfall inches of rainfall inches of rainfall
a CSO event in last year 0 Actual or❑Estimated 0 Actual or 0 Estimated 0 Actual or 0 Estimated
EPA Form 3510-2A(Revised 3-19) Page 11

f -
EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
5.7 Provide the information in the table below for each of your CSO outfalls.
CSO Outfall Number CSO Outfall Number CSO Outfall Number
Receiving water name
Name of watershed/
stream system
d U.S.Soil Conservation 0 Unknown 0 Unknown 0 Unknown
Service 14-digit
watershed code
'> (if known)
Name of state
cc management/river basin
U.S.Geological Survey 0 Unknown 0 Unknown 0 Unknown
8-Digit Hydrologic Unit
Code(if known)
Description of known
water quality impacts on
receiving stream by CSO
(see instructions for
exam des
SECTION 6.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(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
Information for All Applicants ❑ w/variance request(s) 0 wl additional attachments
❑ Section 2:Additional r❑ wl topographic map wl process flow diagram
r
Information ❑ w/additional attachments
0 w/Table A El w/Table D
El Section 3: Information on 0 w/Table B 0 w/Table E
Effluent Discharges
❑ wl Table C ❑ w/additional attachments
Section 4:Industrial ❑ wl SIU and NSCIU attachments ❑ w/Table F
❑✓ Discharges and Hazardous
Wastes ❑ w/additional attachments
w ❑ Section 5:Combined Sewer ❑ w/CSO map ❑ wl additional attachments
Overflows
❑ w/CSO system diagram
REiSection 6:Checklist and 0 w/attachments
Certification Statement
fn
6.2 Certification Statement
u
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
i e k. d EP.cw1 VC
Signature Date signed /14).04/
5140
EPA Form 3510-2A(Revised 3-19) Page 12

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004
TABLE A.EFFLUENT PARAMETERS FOR ALL POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Methods (include
Value Units Value Units Samples units)
Biochemical oxygen demand
❑BODs or o CBOD5 20 mg/L 8 mg/L 470 SM 5210 B-2016 2 mg/L o ML
❑MDL
(report one)
0 ML
Fecal coliform N/A N/A N/A N/A N/A N/A N/A 0 MDL
Design flow rate 12 MGD N/A N/A N/A
pH(minimum) 6.9 s.u.
pH(maximum) 8.0 s.u.
ii
Temperature(winter) 24 deg C 18 deg C 300
Temperature(summer) 28 deg C 25 deg C 447
2 ML
Total suspended solids(TSS) 32.7 mg/L 6.5 mg/L 316 SM 2540-D-2015 2.5 mg/L ❑MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures(Le.,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 13

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EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
TABLE B. EFFLUENT PARAMETERS FOR ALL POTWS WITH A FLOW EQUAL TO OR GREATER THAN 0.1 MGD
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method' (include
Value Units Value Units Samples units)
0 ML
Ammonia(as N) 40.2 mg/L 28.5 mg/L 471 SM 4500 NH3 D-201: 0.25 mg/L 0 MDL
Chlorine N/A N/A N/A N/A N/A N/A N/A 0 MDL
❑ML
residual,TRC)2
(totalML
Dissolved oxygen 8.3 mg/L 7.0 mg/L 747 Hach 10360-2011,RE 0.2 mg/L ❑❑MDL
Nitrate/nitrite 7.69 mg/L 2.43 mg/L 36 SM 4500 NO3 F-201: 1.00 mg/L ML
0 MDL
0 ML
Kjeldahl nitrogen 43.2 mg/L 32.8 mg/L 36 EPA 351.2 Rev 2.0 1.00 mg/L ❑MDL
E ML
Oil and grease 23.2 mg/L 4.81 mg/L 21 EPA 1664 Rev.B 5.0 mg/L ❑MDL
E ML
Phosphorus 4.75 mg/L 3.91 mg/L 36 Hach 8190 TNT 0.05 mg/L ❑MDL
Total dissolved solids 307 mg/L 280 mg/L 4 EPA 160.1 50 mg/L 2 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).
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

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EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method1 (include units)
Value Units Value Units Samples
Metals,Cyanide,and Total Phenols
ML
Hardness(as CaCO3) 98.2 mg/L 88.8 mg/L 3 SM 2340 C 2.00 mg/l 0 MDL
0 ML
Antimony,total recoverable <0.50 ug/L <0.50 ug/L 3 EPA 200.8 0.50 ug/L 0 MDL
Arsenic,total recoverable 0.65 ug/L 0.198 ug/L 12 EPA 200.8 1.00 ug/L ML
0 MDL
CI ML
Beryllium,total recoverable <0.10 ug/L <0.10 ug/L 5 EPA 200.8 0.10 ug/L 0 MDL
ML
Cadmium,total recoverable <0.10 ug/L <0.10 ug/L 12 EPA 200.8 0.10 ug/L 0 MDL
CI Chromium,total recoverable 0.96 ug/L .268 ug/L 12 EPA 200.8 1.00 ug/L ML
0 MDL
CI ML
Copper,total recoverable 10.1 ug/L 5.94 ug/L 98 EPA 200.8 1.00 ug/L 0 MDL
CI Lead,total recoverable 0.314 ug/L 0.086 ug/L 12 EPA 200.8 0.20 ug/L ML
0 MDL
CI ML
Mercury,total recoverable 4.69 ng/L 2.55 ng/L 13 EPA 1631E 0.50 ng/L 0 MDL
CI ML
Nickel,total recoverable 3.30 ug/L 1.63 ug/L 12 EPA 200.8 1.00 ug/L 0 MDL
Selenium,total recoverable <1.00 ug/L <1.00 ug/L 12 EPA 200.8 1.00 ug/L 0 ML
❑MDL
Silver,total recoverable <0.10 ug/L <0.10 ug/L 14 EPA 200.8 0.10 ug/L 0 ML
0 MDL
Thallium,total recoverable <0.10 ug/L <0.10 ug/L 3 EPA 200.8 0.10 ug/L O ML
0 MDL
CI ML
Zinc,total recoverable 19.0 ug/L 13.4 ug/L 12 EPA 200.7 10.0 ug/L 0 MDL
0 ML
Cyanide <0.008 mg/L <0.008 mg/L 12 SM4500 CN E-2011 0.008 ug/t ❑MDL
Total phenolic compounds <5.00 ug/L <5.00 ug/L 3 EPA 420.4 5.00 ug/L CIO
ML
❑MDL
Volatile Organic Compounds
CI ML
Acrolein <5.00 ug/L <5.00 ug/L 3 EPA 624.1 5.00 ug/L 0 MDL
CI ML
Acrylonitrile <5.00 ug/L <5.00 ug/L 3 EPA 624.1 5.00 ug/L 0 MDL
0 ML
Benzene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
CI ML
Bromoform <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ❑MDL
EPA Form 3510-2A(Revised 3-19) Page 17

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
0MB No.2040-0004
NC0023973 M'Kean Maffitt WWTP 001
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method, (include units)
Value Units Value Units Samples
Carbon tetrachloride <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 ML
❑MDL
9 ML
Chlorobenzene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ❑MDL
El Chlorodibromomethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ML
❑MDL
El ML
Chloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
El ML
2-chloroethylvinyl ether <5.00 ug/L <5.00 ug/L 3 EPA 624.1 5.00 ug/L 0 MDL
0 ML
Chloroform 1.34 ug/L 0.447 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
0 ML
Dichlorobromomethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
1,1-dichloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 ML
❑MDL
1,2-dichloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ML
0 MDL
ML
trans-1,2-dichloroethylene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L El MDL
1,1-dichloroethylene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ML
0 MDL
CI ML
1,2-dichloropropane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
CI ML
1,3-dichloropropylene <2.00 ug/L <2.00 ug/L 3 EPA 624.1 2.00 ug/L 0 MDL
El ML
Ethylbenzene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
El Methyl bromide <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ML
0 MDL
Methyl chloride <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L El ML
0 MDL
ID ML
Methylene chloride <2.00 ug/L <2.00 ug/L 3 EPA 624.1 2.00 ug/L 0 MDL
0 ML
1,1,2,2-tetrachloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ❑MDL
Tetrachloroethylene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L ML
0 MDL
CIML
Toluene 1.59 ug/L 0.530 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
1,1,1-trichloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L D ML
❑MDL
CIML
1,1,2-trichloroethane <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
EPA Form 3510-2A(Revised 3-19) Page 18

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method1 (include units)
Value Units Value Units Samples
O ML
Trichloroethylene <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
O ML
Vinyl chloride <1.00 ug/L <1.00 ug/L 3 EPA 624.1 1.00 ug/L 0 MDL
Acid-Extractable Compounds
O ML
p-chloro-m-cresol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
2-chlorophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 1:10 ML
MDL
2,4-dichlorophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
0 MDL
2,4-dimethylphenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
0 MDL
4,6-dinitro-o-cresol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
g ❑MDL
0 ML
2,4-dinitrophenol <18.8 ug/L <18.8 ug/L 4 EPA 625.1 18.8 ug/L ❑MDL
2-nitrophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L O ML
0 MDL
4-nitrophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ML
❑MDL
0 ML
Pentachlorophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
E ML
Phenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
2,4,6-trichlorophenol <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L O ML
0 MDL
Base-Neutral Compounds
E ML
Acenaphthene <0.942 ug/L I <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
Acenaphthylene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L ❑MMDL
O ML
Anthracene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
E ML
Benzidine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
0 ML
Benzo(a)anthracene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ugh!. 0 MDL
ID ML
Benzo(a)pyrene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
3,4-benzofluoranthene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 u g 0/L ML
MDL
EPA Form 3510-2A(Revised 3-19) Page 19

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004 j
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method1 (include units)
Value Units Value Units Samples
ML
Benzo(ghi)perylene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L El MDL
El ML
Benzo(k)fluoranthene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
O ML
Bis(2-chloroethoxy)methane <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
El Bis(2-chloroethyl)ether <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ML
0 MDL
Bis(2-chloroisopropyl)ether <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ML
0 MDL
0 ML
Bis(2-ethylhexyl)phthalate 1.35 ug/L 0.338 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
El ML
4-bromophenyl phenyl ether <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
0 ML
Butyl benzyl phthalate <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
CI ML
2-chloronaphthalene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
4-chlorophenyl phenyl ether <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L O M
❑MDL
O ML
Chrysene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ugh!. ❑MDL
0 ML
di-n-butyl phthalate <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
di-n-octyl phthalate <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
Dibenzo(a,h)anthracene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L l0 ML
MDL
1 1,2-dichlorobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L CI ML
0 MDL
1,3-dichlorobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
1,4-dichlorobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
3,3-dichlorobenzidine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
Diethyl phthalate <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
❑MDL
O ML
Dimethyl phthalate <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
2,4-dinitrotoluene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ML
0 MDL
2,6-dinitrotoluene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0/L ML
MDL
EPA Form 3510-2A(Revised 3-19) Page 20

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP 001 OMB No.2040-0004
W
TABLE C. EFFLUENT PARAMETERS FOR SELECTED POTWS
Maximum Daily Discharge Average Daily Discharge Analytical ML or MDL
Pollutant Number of Method1 (include units)
Value Units Value Units Samples
O ML
1,2-diphenylhydrazine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
El ML
Fluoranthene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
El ML
Fluorene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L❑MDL
O ML
Hexachlorobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ❑MDL
El ML
Hexachlorobutadiene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ❑MDL
O ML
Hexachlorocyclo-pentadiene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 MDL
Hexachloroethane <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ❑MMDL
El ML
Indeno(1,2,3-cd)pyrene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
lsophorone <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
Naphthalene . <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L l0 ML
MDL
O ML
Nitrobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L O MDL
N-nitrosodi-n-propylamine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
❑MDL
El ML
N-nitrosodimethylamine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ❑MDL
N-nitrosodiphenylamine <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L ML
0 MDL
El ML
Phenanthrene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ug/L 0 MDL
CI ML
Pyrene <0.942 ug/L <0.942 ug/L 4 EPA 625.1 0.942 ugh 0 MDL
1,2,4-trichlorobenzene <9.42 ug/L <9.42 ug/L 4 EPA 625.1 9.42 ug/L 0 ML
0 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 21

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EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP 001 OMB No.2040-0004
W
TABLE D.ADDITIONAL POLLUTANTS AS REQUIRED BY NPDES PERMITTING AUTHORITY
Maximum Daily Discharge Average Daily Dischar e
Pollutant Analytical ML or MDL
(list) Value Units Value Units Number of Methods (include units)
Samples
❑ No additional sampling is required by NPDES permitting authority.
El ML
Chlorine(total residual,TRC) 49 ug/L 4.51 ug/L 356 SM 4500 CI G-2011 10 ug/L 0 MDL
Aluminum,total recoverable 68.0 ug/L 39.4 ug/L 12 EPA 200.7 10.0 ug/L ❑ML
❑MDL
❑ML
Barium,total recoverable 15.0 ug/L 11.9 ug/L 12 EPA 200.8 1.00 ug/L 0 MDL
❑ML
Boron,total recoverable 288 ug/L 266 ug/L 2 EPA 200.7 50.0 ug/L ❑MDL
Iron,total recoverable 360 ug/L 222 ug/L 12 EPA 200.7 10.0 ug/L ❑ML
0 MDL
Molybdenum,total recoverable 0.69 ug/L 0.06 ug/L 12 EPA 200.8 2.00 ug/L ❑ML
❑MDL
0 ML
1,4-dioxane 2.21 ug/L 2.21 ug/L 1 EPA 624.1 1.00 ug/L ❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
❑MDL
❑ML
0 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 23
1

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EPA Identification Number NPDES Permit Number Facility Name Duffel!Number Form Approved 03/05/19
OMB No.2040-0004
NC0023973 M'Kean Maffitt WWTP 001
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample.Copy the table to report additional test results.
Test Information
Test Number 1 Test Number 2 Test Number 3
Test species Pimephales promelas Pimephales promelas Pimephales promelas
Age at initiation of test <24 hours <24 hours <24 hours
Outfall number o01 001 001
Date sample collected 12/03/2018 03/04/2019 03/02/2020
Date test started 12/04/2018 03/05/2019 03/03/2020
Duration 7 days 7 days 7 days
Toxicity Test Methods
Test method number Method 1000.0 Method 1000.0 Method 1000.0
Manual title EPA-821-R-02-013 EPA-821-R-02-013 EPA-821-R-02-013
Edition number and year of publication Fourth Edition,October 2002 Fourth Edition,October 2002 Fourth Edition,October 2002
Page number(s) 1—335 1—335 1—335
Sample Type
Check one: ❑ Grab ❑ Grab ❑ Grab
0 24-hour composite CI 24-hour composite CI 24-hour composite
Sample Location
Check one: 0 Before Disinfection ❑ Before Disinfection ❑ Before disinfection
❑After Disinfection ❑After Disinfection ❑After disinfection
CI After Dechlorination CI After Dechlorination 0 After dechlorination
Point in Treatment Process
Describe the point in the treatment process Final Effluent Final Effluent
at which the sample was collected for each Final Effluent
test.
Toxicity Type
Indicate for each test whether the test was ❑Acute ❑Acute ❑Acute
performed to asses acute or chronic toxicity,
or both.(Check one response.) ❑' Chronic E Chronic ❑' Chronic
❑ Both ❑ Both ❑ Both
EPA Form 3510-2A(Revised 3-19) Page 25

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample.Copy the table to report additional test results.
Test Number 1 Test Number 2 Test Number 3
Test Type
Indicate the type of test performed.(Check one ❑ Static ❑ Static ❑ Static
response.)
❑r Static-renewal 2 Static-renewal ❑r Static-renewal
❑ Flow-through ❑ Flow-through ❑ Flow-through
Source of Dilution Water
Indicate the source of dilution water.(check 0 Laboratory water El Laboratory water 0 Laboratory water
one response.)
❑ Receiving water ❑ Receiving water ❑ Receiving water
If laboratory water,specify type. Soft synthetic water Soft synthetic water Moderately hard synthetic water
If receiving water,specify source.
Type of Dilution Water
Indicate the type of dilution water.If salt ❑r Fresh water El Fresh water ✓❑ Fresh water
water,specify"natural"or type of artificial
sea salts or brine used. ❑ Salt water(specify) CISalt water(specify) CISalt water(specify)
Percentage Effluent Used
Specify the percentage effluent used for all
concentrations in the test series. 0.75%,1.5%,3.0%,6.0%,12% 0.75%,1.5%,3.0%,6.0%,12% 0.75%,1.5%,3.0%,6.0%,12%
Parameters Tested
Check the parameters tested. ®pH ® Ammonia ® pH El Ammonia ® pH ® Ammonia
El Salinity ® Dissolved oxygen ® Salinity ® Dissolved oxygen ® Salinity ® Dissolved oxygen
®Temperature ® Temperature ® Temperature
Acute Test Results
Percent survival in 100%effluent % % %
LCso
95%confidence interval
Control percent survival
EPA Form 3510-2A(Revised 3-19) Page 26

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP 001 OMB No.2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample.Copy the table to report additional test results.
Test Number 1 Test Number 2 Test Number 3
Acute Test Results Continued
Other(describe)
Chronic Test Results
NOEC 12 % 12 % 12 %
IC25 >12 % >12 % >12 %
Control percent survival ioo % 100 % 100 %
Other(describe)
ChV>12% ChV>12% ChV>12%
Quality Control/Quality Assurance
Is reference toxicant data available? ❑✓ Yes ❑ No 0 Yes ❑ No ElYes ❑ No
Was reference toxicant test within
acceptable bounds? 0 Yes 0 No 0 Yes 0 No 0 Yes ElNo
What date was reference toxicant test run 12/04/2018 03/05/2019 03/03/2020
(MM/DD/YYYY)?
Other(describe)
EPA Form 3510-2A(Revised 3-19) Page 27

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EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WWTP OMB No.2040-0004
TABLE F.INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs.Copy the table to report information for additional Sills.
SIU SIU SIU
Name of SIU
Mailing address(street or P.O.box)
City,state,and ZIP code
Description of all industrial processes that affect
or contribute to the discharge.
List the principal products and raw materials that
affect or contribute to the SIU's discharge.
Indicate the average daily volume of wastewater
discharged by the SIU. gpd gpd gpd
How much of the average daily volume is
attributable to process flow? gpd gpd gpd
How much of the average daily volume is
attributable to non-process flow? gpd gpd gpd
Is the SIU subject to local limits?
❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
Is the SIU subject to categorical standards?
❑ Yes ❑ No ❑ Yes ❑ No ❑ Yes ❑ No
EPA Form 3510-2A(Revised 3-19) Page 29

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
NC0023973 M'Kean Maffitt WTP OMB No.2040-0004
W
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs.Copy the table to report information for additional SIUs.
SIU SIU SIU
Under what categories and subcategories is the
SIU subject?
Has the POTW experienced problems(e.g.,
upsets,pass-through interferences)in the past 4.5 ❑ Yes ❑ No ❑ Yes ❑ No D Yes ❑ No
years that are attributable to the SIU?
If yes,describe.
EPA Form 3510-2A(Revised 3-19) Page 30

2022 SSWWTP Permit Renewal Application Notes
Section 3 Notes
• 3.12; 13 single dilution, and 4 alternate species multiple dilution
• 3.14; "No" selected because plant no longer uses chlorine disinfection. There is chlorine data during
the summary period from 1/1/19 to 7/7/20. Chlorine data is summarized in Table D instead of Table B.
• 3.20 and 3.21; toxicity data has already been submitted to permitting authority, however, results are
also summarized in Table E.
Data summary from 1/01/2019 to 12/31/2021
Tables A— D reporting guidelines
• Parameters with all non-detects
o Maximum value = < most common reporting limit
o Average value = < most common reporting limit
o RL = most common reporting limit of< values
o Method = most recent
• Parameters with all detects
o Maximum value = maximum reported value
o Average value = calculated average of all reported values
o RL = most recent reporting limit
o Method = most recent
• Parameters with both detects and non-detects
o Maximum value = maximum reported value
o Average value = calculated average of all detects and < values where < = 0
o RL = most recent reporting limit
o Method = most recent
Table A parameter notes
• CBOD
o Method year revised during summary period, 2011 and 2016
• TSS
o Method year revised during summary period, 2011 and 2015
• Design flow rate
o 12MGD
Table B parameter notes
• Ammonia
o Multiple methods and reporting limits, SM 4500 NH3 D-2011 and 0.25 mg/L applies to all but
three results.

• Chlorine
o Reported in Table D
• Nitrate/nitrite
o Multiple methods and reporting limits, reported most recent
• TKN
o Multiple methods and reporting limits, reported most recent
• Oil and Grease
o Multiple reporting limits, reported most recent
• Phosphorus
o Multiple methods and reporting limits, reported most recent
• Total dissolved solids
o Multiple methods and reporting limits, reported most recent
Table C parameter notes
• Antimony
o All ND; reported most common reporting limit and most recent method
• Arsenic
o Both detects and non-detects; reported most recent reporting limit and method
• Beryllium
o All ND; reported most common reporting limit and most recent method
• Cadmium
o All ND; reported most common reporting limit and most recent method
• Chromium
o Both detects and non-detects; reported most recent reporting limit and method
• Copper
o All detects; reported most recent reporting limit and method
• Lead
o Both detects and non-detects; reported most recent reporting limit and method
• Mercury (low-level)
o All detects; reported most recent reporting limit and method
• Nickel
o All detects; reported most recent reporting limit and method
• Selenium
o All ND; reported most common reporting limit and most recent method
• Silver
o All ND; reported most common reporting limit and most recent method
• Thallium
o All ND; reported most common reporting limit and most recent method
• Zinc
o All detects; reported most recent reporting limit and method
• Cyanide
o All ND; reported most common reporting limit and most recent method
• Total Phenol

o All detects; reported most recent reporting limit and method
p p g
• Volatile Organic Compounds
o All parameters (except Chloroform and Toluene) are ND; reported most common reporting
limit and most recent method
o Chloroform
• Both detects and non-detects; reported most recent reporting limit and method
o Toluene
• Both detects and non-detects; reported most recent reporting limit and method
• Acid Extractable Compounds
o All parameters ND; reported most common reporting limit and most recent method
• Base Neutral Compounds
o All parameters (except Bis (2-ethylhexyl) phthalate) are ND; reported most common reporting
limit and most recent method
o Bis (2-ethylhexyl) phthalate
• Both detects and non-detects; reported most recent reporting limit and method
Table D parameter notes
• Chlorine
o Both detects and non-detects; reported most recent reporting limit and method
o Two results are <50 ug/L; one result is >36 ug/L.
• Aluminum
o All detects; reported most recent reporting limit and method
• Barium
o All detects; reported most recent reporting limit and method
• Boron
o All detects; reported most recent reporting limit and method
• Iron
o All detects; reported most recent reporting limit and method
• Molybdenum
o Both detects and non-detects; reported most recent reporting limit and method
• 1,4-dioxane
o One sample result

EPA Identification Number NPDES Number Facility Name Outfall Number
NC0023973 Southside WWTP 1
Method Number(if Estimated Concentration (If
Pollutant(Required) CAS number Applicable) Reason Pollutant Believed Present in Discharge Known)
EPA624.1 SIM Commonly used compound and low levels are in the water supply-no
1,4-Dioxane 123-91-1 specific dischargers have been identified 2.21 ug/L
CFPUA staff had samples from the process control effluent location analyzed by identified certified methods for pollutants that are certified by the NC State Lab. This includes
pollutants that are not included in the routine NPDES permit monitoring and priority pollutant list. This"Detected" pollutants are summarized in a"Disclosure of Poillutants"
table that is attached. This summary includes results for PFAS and other pollutants at this process control location,which CFPUA believes is a good estimate of the value that
would be present in the effluent,Outfall 001,discharge.

Disclosure of Pollutants Detected at the Southside Wastewater Treatment Process Control Effluent Location
Composite or Reporting Contract Lab
Date Time Sample Location Parameter Results Units Test Method Lab Name Lab Project# Comments
Grab Limit Certification#
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical- PEAS compounds in red tont are new
1/6/2022 10:13 AM Grab NVHOS 5.81 ng/L 1.29 Dilution(non- N/A
Control Location Wilmington to the CFPUA List as of 1/6/22
potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location PMPA 10.5 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
2,3,3,3-Tetrafluoro-2-
(1,1,2,2,3,3,3-
heptafluoropropoxy)-propanoic PEAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location acid or 4.06 ng/L 0.27 Dilution(non- Wilmington N/A
Hexafluoropropyleneoxide potable water)
dimer acid(HFPO-DA or
PEPrOPrA or GenX)
Perfluorooctanesulfonate or PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Perfluorooctane sulfonic acid 6.69 ng/L 0.25 Dilution(non- N/A
Control Location Wilmington
(PFOS) potable water)
N-methylperfluoro-1-
octanesulfonamidoacetic acid PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location or N-Methylperfluorooctane 0.818 ng/L 0.27 Dilution(non- Wilmington N/A
sulfonamido acetic acid potable water)
(NMeFOSAA)
PEAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Byproduct 4(BP4);R-PSDA 27.9 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
PEAS by Isotope
SSWWTP Effluent Process Byproduct 5(BPS);Hydrolyzed Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location PSDA 6.91 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
PEAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location R-EVE 4.31 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
Sodium 2,3,3,3-tetrafluoro-2- PFAS by Isotope
SSWWTP Effluent Process (perfluoroethoxy)propanoic Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location acid or Perfluoroethoxypropyl 25.5 ng/L 1.29 Dilution(non- N/A
Wilmington
carboxylic acid(PEPA) potable water)
SSWWTP Effluent Process Perfluoropentanoic acid PFAS by Isotope Enthalpy Analytical-
1/6/2022 10:13 AM Grab 9.63 ng/L 0.27 Dilution(non- N/A
Control Location (PFPeA) Wilmington
_ potable water)
Perfluoropentanesulfonate or PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluoropentane sulfonic acid 0.389 ng/L 0.26 Dilution(non- N/A
Wilmington
(PFPeS) potable water) g
Fluorotelomer sulfonate 6:2 or PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location 1H,1H,2H,2H-Perfluorooctane 0.527 ng/L 0.26 Dilution(non- Wilmington N/A
sulfonic acid(6:2 FTS) potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location FBSA 0.323 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)

Composite or Reporting Contract Lab
Date Time Sample Location Parameter Results Units Test Method Lab Name Lab Project# Comments
Grab Limit Certification#
SSWWTP Effluent Process PFAS by Isotope Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorohexanoic acid(PFHxA) 13.3 ng/L 0.27 Dilution(non- Wilmington N/A 0122-711
potable water)
PEAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorooctanoic acid(PFOA) 5.11 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorodecanoic acid(PFDA) 0.475 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)
SSWWTP Effluent Process PFAS by Isotope Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location N-CMAmP-6:2 FOSA 3.75 ng/L 1.15 Dilution(non- Wilmington N/A
_ _ potable water)
Perfluorohexanesulfonate or PEAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorohexane sulfonic acid 3.17 ng/L 0.25 Dilution(non- Wilmington N/A
_ (PFHxS) potable water)
PFAS by Isotope
SSWWTP Effluent Process Perfluorobutyric acid or Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorobutanoic acid(PFBA) 8.03 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)
Perfluorobutanesulfonate or PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorobutane sulfonic acid 5.03 ng/L 0.32 Dilution(non- Wilmington N/A
(PFBS) potable water)
PFAS by Isotope
SSWWTP Effluent Process Perfluoroheptanoic acid Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location (PFHpA) 2.77 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Perfluorononanoic acid(PFNA) 0.561 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)
PFAS by Isotope
SSWWTP Effluent Process Perfluoro(3,5-dioxahexanoic) Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location acid(PFO2HxA) 8.80 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
PEAS by Isotope
SSWWTP Effluent Process Perfluoro(3,5,7-trioxaoctanoic) Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location acid(PFO3OA) 4.88 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
Perfluoro(3,5,7,9- PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location tetraoxadecanoic)acid 1.84 ng/L 1.37 Dilution(non- Wilmington N/A
(PFO4DA) potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location FHxSA 0.177 ng/L 1.15 Dilution(non- Wilmington N/A
_ potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location PFPA 46.1 ng/L 1.10 Dilution(non- Wilmington N/A
potable water)
PFAS by Isotope
SSWWTP Effluent Process Perfluoro-2-methoxyacetic acid Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location (PFMOAA) 269 ng/L 1.29 Dilution(non- Wilmington N/A
potable water)
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location Nafion Byproduct 2 0.544 ng/L 0.27 Dilution(non- Wilmington N/A
potable water)

Composite or Reporting Contract Lab
Date Time Sample Location Parameter Results Units Test Method Lab Name Lab Project It Comments
Grab Limit Certification>I
PFAS by Isotope
SSWWTP Effluent Process Enthalpy Analytical-
1/6/2022 10:13 AM Grab Control Location 5:3 FTCA 10.3 ng/L 1.87 Dilution(non- Wilmington N/A
potable water)
Enthalpy Analytical-
1/11/2022 10:17 AM Grab SSWWTP Effluent 1,4-Dioxane 2.21 ug/L 1.00 EPA624.1 SIM 495 22A0535
Richmond _
SSWWTP Effluent Process
60 mg/L 0.50 SM 4500-CI B CFPUA 141 1/26/2022 8:22 AM Composite Control Location Chloride
SSWWTP Effluent Process
1/26/2022 8:22 AM Composite Control Location Conductivity 751 umhos/cm 50.00 SM 2510 B CFPUA 141 15605-22
SSWWTP Effluent Process
1/26/2022 8:22 AM Composite Control Location Turbidity 7.2 NTU 0.10 SM 2130 B CFPUA 141
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Calcium 29.4 mg/L 0.0500 EPA 200.7 Rev 4.4 495
Control Location Richmond
SSWWTP Effluent Process Enthalpy Analytical-
Potassium 13.6 mg/L 0.50 EPA 200.7 Rev 4.4 Richmond
1/26/2022 8:22 AM Composite Control Location 495
SSWWTP Effluent Process 4.4 Richmond
Enthalpy Analytical-
1/26/2022 8:22 AM Composite Magnesium 4.52 mg/L 0.0100 EPA 200.7 Rev 495
Control Location
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Control Location Manganese 0.0437 mg/L 0.0100 EPA 200.7 Rev 4.4 Richmond 495
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Sodium 51.1 mg/L 0.50 EPA 200.7 Rev 4.4 495
Control Location Richmond
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Silicon 4.25 mg/L 0.100 EPA 200.7 Rev 4.4 495 22A1207
Control Location Richmond
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Strontium 0.121 mg/L 0.100 EPA 200.7 Rev 4.4 495
Control Location Richmond
SSWWTP Effluent Process Enthalpy Analytical-
Alklinity
1/26/2022 8:22 AM Composite Control Location 217 mg/L 5.0 SMZ2 2320B-2011 Richmond 495
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Control Location Fluoride 0.482 mg/L 0.100 EPA 300.0 Rev.2.1 Richmond 495
SSWWTP Effluent Process Enthalpy Analytical-
Sulfate 44.8 mg/L 1.0 EPA 300.0 Rev.2.1 Richmond
1/26/2022 8:22 AM Composite Control Location
495
SSWWTP Effluent Process Enthalpy Analytical-
1/26/2022 8:22 AM Composite Volatile Solids 124 mg/L 20.0 EPA 160.4 495
Control Location Richmond
Pace National-Mt.
SSWWTP Effluent Process
2/1/2022 8:15 AM Composite Control Location EPH(Aliphatic C19-C36) 0.104 mg/L 0.1 MADEP Juliet 375 MassDEP EPH Method-May 2004
SSWWTP Effluent Process Pace National-Mt. v1.1.pdf
2/1/2022 8:15 AM Composite Total Extractable Hydrocarbons 0.268 mg/L 0.1 MADEP 375
Control Location Juliet 92585611 -
SSWWTP Effluent Process Pace Analytical-
Orthophoshate 3.5 mg/L 0.50 SM 4500-P E-2011 Asheville
2/1/2022 8:15 AM Composite Control Location 40
SSWWTP Effluent Process
2/1/2022 8:15 AM Composite Control Location MBAS 0.31 mg/L 0.1 SM 5540 C-2011 Statesville Analytical 440 NEMI Method Summary.-5540 C

Composite or Reporting Contract Lab
Date Time Sample Location Parameter Results Units Test Method Lab Name Lab Project# Comments
Grab Limit Certification#
SSWWTP Effluent Process Eurofins Eaton-South
2/2/2022 8:08 AM Composite Adsorbable Organic Halides 0.33 mg/L 0.02 EPA 1650C E87052
Control Location Bend
Method 1650:Adsorbable Organic
SSWWTP Effluent Process Eurofins Eaton-South
2/2/2022 8:08 AM Composite Control Location AOX Result 1 0.35 mg/L 0.02 EPA 1650C Bend E87052 810-13697-1 Halides by Adsorption and Coulometric
Titration;Revision C Lepa.gov)
SSWWTP Effluent Process Eurofins Eaton-South
2/2/2022 8:08 AM Composite Control Location AOX Result 2 0.32 mg/L 0.02 EPA 1650C Bend E87052
Method 9020B:Total Organic Halides
2/2/2022 8:08 AM Composite SSWWTP Effluent Process (TOX),part of Test Methods for
Total Organic Halides(TOX) 967 mg/L 200 SW-846 9020 B GEL Laboratories 233
Control Location Evaluating Solid Waste,
Physical/Chemical Methods(epa.govj
SSWWTP Effluent Process 569320
2/2/2022 8:08 AM Composite Control Location Acidity 13.8 mg/L 1.00 5M 2310 B-2011 GEL Laboratories 233
SSWWTP Effluent Process
2/2/2022 8:08 AM Composite Control Location Color 70.0 PCU 10.0 SM 2120 B-2011 GEL Laboratories 233
SSWWTP Effluent Process
2/2/2022 9:46 AM Grab Control Location Total Organic Carbon(TOC) 13.2 mg/L 1.00 SM 5310 B-2014 GEL Laboratories 233
Method 8011:1,2-Dibromoethane and
1,2-Dibrom-3-Chloropropane by
SSWWTP Effluent Process Enthalpy Analytical- Microextraction and Gas
2/2/2022 9:46 AM Grab Control Location 1,2,3-Trichloropropane 0.000067 mg/L 0.00001 SW-846 8011 Richmond 495 22B0308 Chromatography,part of Test Methods
for Evaluating Solid Waste,
Physical/Chemical Methods(epa.gov)
55WWTP Effluent Process Nonhalogenated Volatile Pace Analytical-Gulf
2/2/2022 9:46 AM Grab 1.47 mg/L 1.00 618
Control Location Organics(Ethylene glycol) SW-846 8015 C Coast 92586021
SSWWTP Effluent Process TPH GASOLINE RANGE, Pace Analytical-
2/2/2022 9:46 AM Grab12
Control Location ORGANICS 3.5 mg/L 0.080 EPA 5030B/8015C Charlotte
SSWWTP Effluent Process SM 4500-NO2-B- Enthalpy Analytical-
2/15/2022 8:45 AM Composite Control Location Nitrite as N 0.11 mg/L 0.05 2011 Richmond 495 2261014

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SCALE M Figure 1 v
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Miles ti-p!Fear Earire..aatai Eaainaars&SCianLata M'Kean Maffitt(Southside)WWTP
1 in=0.5 miles '— --. NPDES Permit NC0023973

Cape Fear Public Utility Authority(CFPUA)
CFPUA Process Narrative
M'Kean Maffitt(Southside)WWTP Existing 12 mgd Rated Capacity Process Flow
The M'Kean Maffitt(Southside)WWTP is currently rated to treat up to 12 mgd. The Cape Fear Public Utility
Authority(CFPUA)is conducting planning and engineering efforts to expand the plant rated capacity in phases to
16 mgd,20 mgd,and an ultimate future expansion to 24 mgd. Figure 4 provides a schematic of the existing plant
unit processes for 12 mgd capacity, including a water balance through the plant. The following narrative
summarizes existing unit processes.
The CFPUA has multiple remote wastewater pump stations that collect flow from the service area to route to
the Southside WWTP. Wastewater flow from the influent force mains and the Northeast Interceptor combine
upstream of the screening/grit removal facility. Plant influent flows through two mechanical bar screens and
two grit collection systems. A manual bypass screen provides redundancy.
Flow is then split to two treatment trains,with one primary clarifier and one trickling filter per train. Primary
sludge and primary scum are pumped to the anaerobic digesters. Recirculation pumps recycle trickling filter
effluent back to the trickling filter influent box.
Trickling filter effluent flows by gravity to the aeration basin where it combines with return activated sludge(RAS).
The effluent from the aeration basin flows to the intermediate pump station and is split to the two secondary
clarifiers. RAS flows by gravity back to the aeration basin. Waste activated sludge pumped to the sludge
thickening building.
Secondary clarifier effluent(SCE)flows by gravity to the ultraviolet disinfection process. Effluent from the
ultraviolet disinfection process flows by gravity through the effluent weir box and into the river.
The phased plant expansion will also require that more stringent NPDES Permit limits be met. As such,the
existing 12 mgd site layout will require modification to accommodate the phased expansion with more
advanced treatment. Components of the existing infrastructure will be removed and some existing
infrastructure will be modified as part of this upgrade.
Treatment Upgrade and Expanded Rated Capacity Process Flow(16,20,and 24 mgd)
CFPUA is currently planning to upgrade the M'Kean Maffitt(Southside)WWTP to include more advanced
treatment processes. This includes expansions of capacity in phases of 16 mgd,20 mgd,and 24 mgd. A schematic
and water balance for each is provided in Figures 5,6,and 7 for the design capacity of 16 mgd,20 mgd,and 24
mgd, respectively. The following is a narrative description of the potential unit processes in the expanded capacity
scenarios.The final selection of unit processes will be made during the design of the plant expansion.

Preliminary Treatment
For the 16 mgd expansion,an influent force main will convey wastewater to two mechanical screens,with a third
screen as a standby unit. In the 20 and 24 mgd expansion phases,all three mechanical screens will be required for
peak flows.A manual bar rack will be used as the standby unit in the 20 and 24 mgd capacity scenarios. In the
three expansion scenarios,a total of three grit collectors with capacities of 20 mgd each and six grit pumps will be
installed to remove grit prior entering to the primary clarifiers. The grit collector tanks will be sized to
accommodate future flows with no additional structural improvements.
The existing secondary clarifiers will be used for influent flow equalization storage in all expansion phases.
The tanks will be capable of storing 1.8 million gallons and will be capable of providing equalization of both
raw influent and primary effluent. The tanks will also serve as filter backwash waste storage. Pumps will be
installed to return equalized flow to the next treatment process.
Primary Clarifiers and Primary Sludge Pumping
In the 16 mgd expansion,two new 115-foot diameter primary clarifiers with influent and effluent piping will be
constructed. These two clarifiers are sufficient for a plant capacity of 24 mgd. Two duty and one standby primary
sludge pumps will convey primary sludge to the anaerobic digesters.The primary sludge pumps will include
variable frequency drives.
Aeration Basins
Four new aeration basins with volumes of 1.65 million gallons will be constructed for the 16 mgd capacity
expansion.An additional aeration basin of the same dimension will be added during each phase of expansion
from 20 to 24 mgd.
Secondary Clarifiers and Activated Sludge Pumping
Two 160-foot diameter secondary clarifiers will be constructed for the 16 mgd capacity expansion.A third
secondary clarifier will be added during the 20 mgd capacity expansion phase. A fourth clarifier will be added
for the 24 mgd capacity expansion phase. Four activated sludge pumps with variable frequency drives will
pump activated sludge to the WAS and RAS channels.
Tertiary Filters
Tertiary treatment filters will be added to the treatment processes for all three capacity expansion phases. The
tertiary filters will be deep bed filters with coarse monomedia sand. For the 16 mgd expansion,four 9.5-foot by
60-foot filters will be constructed. An additional tertiary filter will be added during each phase of expansion for a
total of 6 filters at 24 mgd.
Ultraviolet Disinfection
Ultraviolet disinfection will continue as the means of disinfection in the expansion to 16 mgd through 24 mgd
capacity.Seven UV channels will be constructed during the 16 mgd expansion,with five channels equipped with
low pressure, high intensity lamps. Lamps will be added to the unequipped channels during each phase of
expansion from 20 to 24 mgd,so that all seven channels will be equipped fter the 24 mgd upgrade. The lamps will
2
be designed to have the capability of providing a dose of 30 mJ/cm at the peak hour flow,with one channel out of
service at 24 mgd.

Waste Activated Sludge Thickening
A new thickening and dewatering facility will be part of the capacity expansion at the Southside WWTP.Two
gravity belt thickeners from the existing plant and one new gravity belt thickener will be used for WAS thickening.
Thickened WAS will be stored to equalize thickened sludge production to allow for 24 hour digester feeding with
intermittent thickening operations.
Anaerobic Digestion and Stabilization
Two new anaerobic digesters will be required for the expansion to 16 mgd.The two new digesters will have a
diameter of 85 feet and a volume of 1.061 million gallons each. An upgrade to the largest existing anaerobic
digester will be required for the expansion to 20 mgd. One additional anaerobic digester will be required for the
24 mgd expansion.
Digested Residuals Dewatering
Four belt filter presses designed to operate at a normal hydraulic loading rate of 75 gallons per minute per meter
and a solids loading rate of up to 750 dry pounds per hour per meter will be required to dewater anaerobically
digested residuals.The plant will be capable of storing dewatered cake for up to 45 days.

M'Kean Maffitt WWTP
Plant Process Schematic
Force
Main
` Secondary
Clarifier
Preliminary ' Primary Clarifier Trickling Filter --:\
Treatment
Recirculation
Bar Screens/Grit Pump Station
removal < > > UV
Splitter Primary Clarifier Trickling Filter Aeration Basin ' q Secondary System
Box Clarifier
Clarifier Intermediate
distribution Pump
Boxes AL Statinn
Return •
- IIIActivated
Sludge Cape
RAS Fear
River
'W III
Filtrate
Primary 1 ` 7
Sludge Pump Dig i Dig 3lir
Station
—____-----)
Digester TWAS Thickening WAS
Tank Bldg. PS
Bldg.
,------"--N ----- -./
Dig 2 Dig 4
Gas Primary
..... Dewatering Facility Offsite Sludge
Disposal
AL
Filtrate
PS
Revised 10/27/21

eri:p.,+,.146. p=24 mgd
0=12.0 mgd_* —�I
. i
—i . ► Apb�d� '�>� ♦ ► —► —
• c `eft:e6 ago
Bar Screens N.,,, Trickling Filter Aeration Tank intermediate
Grit Primary Clarifier O Pump Station
Removal (x2)
lir
Recirculation
Pump Station D=12.0 mgd
Cape Fear O )Q=12.0 mgd
;., Dechlorinatan Chlorine Disinfection \/
Secondary Clarifier
(x2)
RAS I I WAS
•
0.1,0 mod
Primary Sludge
TWAS Gravity Belt WAS Pump
Storage Thickening Station
Filtrate
_.• 0 S ti.
♦ "y
Primary Sludge Anaerobic Belt Filter Press Off-Site Disposal
Pump Station Digester
(x3)
r
. i 11
Ii-( 1 1
Filtrate Lime
Pump Station Stabilization
Figure 4:
Existing Process Flow Diagram
M'Kean Maffitt WWTP
NPDES Permit NC0023973
]D777.e01 fioD Fawn a Exallny Pmcass now Qa{ram 12 AM'1)(Amoiy

•
///T 0=32.0 mgd ^
Bar Screens N/ Aeraticxi Basin Intermediate
Grit Primary Clarifier (x4) Pump Station
Removal ((2)
0=16.0 mgd
Cape Fear
River � _o l 2..5
I I! O=16.0 mgd •
UV Disinfection J Tertiary Fihers
(x4) Secondary Clarifier
(x2)
RAS
0=17.3mgd
Primary Sludge
�- WAS 0=t3mgd 0
TWAS Gravity Belt RAS/WAS
Storage Thickening Pump Station
it Filtrate •
...._,. 0 ii.
it 0 raillW
Primary Sludge Anaerobic Bell Filter Press Off-Site Disposal
Pump Station Digester
(x2)
Filtrate Lime
Pump Station Stabilization
Figure 5:
16.0 MGD Process Flow Diagram
M'Kean Maffitt WWTP
30377-001-5riD Figura 5 Process Floe Diagram 16 MGD Cayaty NPDES Permit NC0023973

Q-40.0 mgd ^
Q=20.0 mgd—i -� \ / —IF
/ ♦ ► —4 (C�� —
• V V
Bar Screens Aeration Basin Intermediate
Grit Primary Clarifier (x5) Pump Station
Removal (x2)
Q=20.0 mgd
',,,,b Cape Fear
.._.4 River �— e 4 l )
I I Q=20.0 mgd
o )
/
UV Disinfection Tertiary Filters \\v/
(x5) Secondary Clarifier
(x3)
RAS
Q=21.7mgd
Primary Sludge
( �_ 4 WAS
L ___i Q=1.7mgd
TWAS Gravity Belt RAS/WAS
Storage Thickening Pump Station
+ Filtrate
,�♦-rT
—1, 0 liii
Primary Sludge Anaerobic Bell Filter Press Oft-Site Disposal
Pump Station Digester
(x3)
Filtrate Lime
Pump Station Stabilization
Figure 6:
20.0 MGD Process Flow Diagram
M'Kean Maffitt WWfP
NPDES Permit NC0023973
30077-001-500 FIgurn 6 Wucnca Flow 6a0ram 20 AIGD Capac ty

0=48.0 mgd
Q=24.0 mgd--► —i J —f I a ► —► ! e —
Bar Screens / J a � �/ Aeration Basin Intermediate
Grit Primary Clarifier (x6) Pump Station
Removal (x2)
0=20.0mgd
Cape Fear
River �_ o 1 CI=24.0 mgd
231 J I If f
UV Disinfection Tertiary Filters \/
(x6) Secondary Clarifer
(x4)
RAS
I jo S 26.0 rngd
Primary Sludge
Li.
f WAS
.. Q=2.O mgd
TWAS J Gravity Belt RAS/WAS
Storage Thickening Pump Station
Filtrate
• p
r
—i ► ► 'w2
Primary Sludge Anaerobic Belt Filter Press Off-Site Disposal
Pump Station Digester
(x4)
1 i
Filtrate Lime
Pump Station Staoitization
Figure 7:
24.0 MGD Process Flow Diagram
M'Kean Maffitt WWTP
30377-0e1h00 Flvre7 Prom.Flnw Grogram 2a MGG Cepanry NPDES Permit NC0023973

M'Kean Maffitt WWTP 3/29/22
NC0023973
M'Kean Maffitt WWTP
Equipment List
Bar Screens
Number of mechanical screens 2
Channel width 4 ft
Clear opening between bars 3/8 inch
Number of manual bar racks 2
Channel width 4 ft
Clear opening between bars 3/4 inch
Grit Collector
Number 2
Type Detritor
Average capacity of each unit 5 MGD
Diameter 14 ft
Grit Classifier
Number 2
Type Reciprocating Rake
Primary Clarifiers
Number 2
Type Circular, center feed
Inside Diameter 100 ft
Surface area, each 7,854 sq ft
Total Surface area 15,708 sq ft
Surface overflow at design flow 765 gpd/sq ft
Side water depth 12 ft
Volume of each tank 0.70 million gal
Total volume 1.41 million gal
Detention time at design flow 2.82 hr
Scum collector mechanism Scum beach
Primary Scum Pumps
Number 2
Type Submersible
Influent Sampling
Number 1
Type Time paced
Trickling Filters
Number 2
Diameter 180 ft
Type of media 1 rock, 1 plastic
Depth of media 5.25 ft
Page 1 of 6

M'Kean Maffitt WWTP 3/29/22
NC0023973
Surface area, each 25,450 sqft
Total surface area 50,900 sqft
Hydraulic loading rate 0.164 gpm/sqft
BOD loading rate 45 lb/day/1000 ft3
Recirculation Pumps
Number 3
Type Vertical Turbine
Capacity 1-4,200 gpm @ 21' TDH
2-4,200 gpm @16'TDH
Horsepower 1-40 HP, 2-30 HP
Aeration Basin
Number 1
Diameter 95 ft
Depth 10 ft
Volume 0.530 million gal
Detention time at design flow 1.06 hr
Type of aeration Course bubble diffused air
Number of diffusers 216
Blowers
Number 3
Type Multi-Stage Centrifugal
Capacity of each blower 2,000 icfm
Operating pressure 5.6 psi
Horsepower 100
Intermediate Pumps
Number 3
Type Screw
Capacity 10,400 GPM
Lift 11.46 ft
Horsepower 50
Final Clarifiers
Number 2
Type Circular, center feed; flocculator
Diameter 105 ft
Surface Area, each 8,660 sqft
Surface overflow rate at design flow 695 gpd/sqft
Side water depth 14 ft
Total volume 1.8 million gal
Detention time at design flow 3.6 hr
Type of solids removal system Scrapers
Scum collector mechanism Rotating scum pipe; Ducking skimmer
Scum Pumps
Number 2
Page 2 of 6

M'Kean Maffitt WWTP 3/29/22
NC0023973
Type Plunger
Maximum capacity of each pump 75 GPM
Horsepower 5
UV Chambers
Number 2(five-pass)
Length x Width x SWD (each tank) 50'x55'x505'
Total volume 452,000 gal
Detention time at design flow 27 min
UV Disinfection
Two Channels, four banks per channel, 24 (1000 watt) lamps per bank
Peak Flow 30 MGD (3 banks per channel) 36 MGD (4 banks per channel)
Flow 12M D
AverageG
Minimum Flow 1.00 MGD
Effluent Flow Measurement
Type Weir level measurement
Weir length 11 ft
Effluent Sampling
Number 2
Type Automatic Flow
Location NPDES sample point
Primary Sludge Pumps
Number 3
Type Diaphragm
Capacity 265 GPM
Total dynamic head 70 ft
Horsepower 5
Waste Activated Sludge Pumps
Number 2
Type Centrifugal
Capacity 230 GPM
Total dynamic head 55ft
Horsepower 7.5
Number 1
Type Centrifugal
Capacity 200 GPM
Total dynamic head 70 ft
Horsepower 15
Gravity Belt Thickener
Number 2
Belt width 2 meters
Page 3 of 6

M'Kean Maffitt WWTP 3/29/22
NC0023973
GBT Polymer System
Type Dry, Manual Mix
Number of tanks 2
Capacity per tank 750 gal
Number of metering pumps 2
TWAS Screw Conveyor
Diameter 12"
Capacity 600 cfh
Thickened Waste Activated Sludge Pumps (From GBT to TWAS Storage)
Number 2
Type diaphragm
Capacity 170 GPM
Total Dynamic Head 80 ft
Horsepower 5 HP
Thickened Waste Activated Sludge Storage Tank
number 1
Length x Width x SWD 17.5' x 17.5' x 14'
Volume 32,000 gal
Type of Mixer Mechanical
Thickened Waste Activated Sludge Transfer Pump (from TWAS Storage to Digesters)
Number 2
Type Progressive Cavity
Capacity 50 GPM
Total Dynamic Head 15 ft
Horsepower 3
Anaerobic Digesters
Number 1
Diameter 85 ft
Maximum side water depth 25 ft
Volume 1.06 million gal
Mixing system type Cannons
No. of mixers 7
Diameter of mixers 18
Number 3
Diameter 60 ft
Maximum side water depth 18 ft
Volume, each 381,000 gal
Total volume 1.14 million gal
Mixing system type (digester 1 and 3 only) Cannons
No. of mixers, per digester 6
Diameter of mixers 18
Digester Recirculation Pumps
Number 2
Page 4 of 6

M'Kean Maffitt WWTP 3/29/22
NC0023973
Type Horizontal non-clog
Capacity 150 GPM
Total Dynamic head 46 ft
Horsepower 15
Number 1
Type Horizontal recessed impeller
Capacity 360 GPM
Total Dynamic Head 26 ft
Horsepower 10
Digester Transfer Pump
Number 1
Type Centrifugal
Capacity 700 GPM
Horsepower 15
Sludge Heat Exchangers
Number 3
Capacity Two @ 750,000 BTU and One @ 1,500,000 BTU
Digester Gas Storage
Type Gas holder cover
Location Digester No. 2
Best Filter Press Feed Pumps
Number 3
Type Progressive Cavity
Capacity 200 GPM
TDH 45ft
Best Filter Presses
Number 2
Belt Width 2.0 meters
BFP Polymer Systems
Type Dry; manual mix
Number of mixing tanks 2
Number of storage tanks 4
Cake Unloading Station
Number of Hoppers 1
Number of Screw Conveyors 1
Number of Belt Conveyors 1
Sludge Storage Pad
Total Area 1.05 ac
Covered Area 0.61 ac
Page 5 of 6

M'Kean Maffitt WWTP 3/29/22
NC0023973
Standby Generator
Capacity 750 kW
Voltage 480 V
Fuel Tank 7000 gal
Screw Pump Generator
Capacity 200 kW
Voltage 480 v
Fuel Tank 1000 gal
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Cape Fear Public Utility Authority (CFPUA)
2022 NPDES Permit Renewal Application
CFPUA Residuals Management
Introduction
The Cape Fear Public Utility Authority (CFPUA) was created by the City of
Wilmington, NC and New Hanover County, NC on July 1, 2008 to consolidate
provision of water and wastewater services within their combined services areas.
Its core principles are stewardship, sustainability, and service, and its mission is to
provide high quality service in an environmentally responsible manner while
maintaining the lowest practicable cost. The Authority strives to provide the safest
and highest quality water and wastewater services with heightened consideration of
the unique environment within which it operates and the efficiency and
effectiveness of service as it impacts its customers whose user fees are its sole
funding source.
The Cape Fear Public Utility Authority (CFPUA) operates and maintains two
wastewater treatment plants (WWTP) and two water treatment plants (WTP) - the
James A. Loughlin WWTP (Northside Wastewater Treatment Plant - NSWWTP), the
M'Kean Maffitt WWTP (Southside Wastewater Treatment Plant - SSWWTP), the
Sweeney Water Treatment Plant (SWTP), and the Richardson Water Treatment
Plant (RWTP).
Residuals sources within these facilities include NSWWTP digested residuals,
SSWWTP digested residuals, SWTP alum residuals, and NSWWTP digestion system,
SSWWTP digestion system, and SWTP water treatment tankage contents removal
associated with periodic maintenance campaigns. Residuals produced by these
facilities are processed and managed in accordance with NCDENR Permit
WQ0001271 governing land application of Class B wastewater residuals and Permit
WQ0011869 governing distribution of Class A wastewater residuals. As applicable,
and in conformance with all regulatory programs/authorizations, the CFPUA also
supports a process of receiving non- CFPUA residuals for processing and disposal
under its residuals permits, including any modifications necessary to enable and
support this practice.
The NSWWTP is a 16 million gallon per day (MGD) advanced treatment level facility
located at 2311 N. 23rd Street in Wilmington, NC. It was originally placed into
service in 1970 as an 8 MGD secondary treatment facility, and many improvements
have been incorporated in the intervening period. Construction was completed in
2009 on an $80,000,000 plant expansion/upgrade project begun in 2005. Liquid
treatment processes installed at this facility include screening, grit removal,
primary sedimentation, activated sludge secondary biological treatment, filtration,
and ultraviolet (UV) disinfection. Solids treatment processes include gravity belt

thickening, anaerobic digestion, and belt filter press dewatering. The liquid leaving
the plant (effluent) is of extremely high quality as set forth in the facility's National
Pollutant Discharge Elimination System (NPDES) permit limits and is currently
returned to the environment bySolids/residuals discharge to the Cape Fear River.9
produced within the plant's processes are stabilized to North Carolina Class B land
application standards but are currently landfilled at a Municipal Landfill. Additionally,
they can be processed to North Carolina Class A Product/Distribution standards
using alkaline stabilization.
Residuals generated within the CFPUA's Sweeney Water Treatment Plant (SWTP)
are pumped to the NSWWTP for processing.
The SSWWTP is a 12 MGD secondary treatment level facility located at 3436 River
Road in Wilmington, NC. It was originally placed into service in 1972 as a 6 MGD
facility serving the city of Wilmington. It was later expanded to 12 MGD to serve
New Hanover County and the Town of Wrightsville Beach, and other improvements
were also incorporated throughout the intervening period. Improvements in the
capacity and level of treatment processes currently installed at this facility include
screening, grit removal, primary sedimentation, trickling filtration and activated
sludge secondary biological treatment, secondary clarification, and ultraviolet (UV)
disinfection. Solids treatment processes include gravity belt thickening, anaerobic
digestion, and belt filter press dewatering. The liquid leaving the plant (effluent) is
of high quality as set forth in the facility's National Pollutant Discharge Elimination
System (NPDES) permit limits and is currently returned to the environment by
discharge to the Cape Fear River. Solids/residuals produced within the plant's
processes are stabilized to North Carolina Class B land application standards but
are currently landfilled at a Municipal Landfill.

2021 Performance
NSWWTP
During 2021, the NSWWTP processed approximately 39,124,760 gallons of
anaerobically digested residuals at an average Total Solids (TS) concentration of
1.3% (1,916 Dry Tons (DT)) yielded 15,673 Cubic Yards (CY) (13,199 Wet Tons
(WT)) of cake at an average TS concentration of 16.0% following dewatering at the
NSWWTP.
SWTP
During 2021, the SWTP conveyed to the NSWWTP by pipeline approximately
18,965,829gallons of alum residuals at an average TS concentration of 1.4% (1,690
DT) and yielded 6,300 CY (5,290 WT) of cake at an average TS concentration of
20.7% following dewatering at the NSWWTP.
SSWWTP
During 2021, the SSWWTP processed approximately 15,315,000gallons of
anaerobically digested residuals at an average TS concentration of 1.3% (748 DT)
yielded 6,728 CY (5,609 WT) of cake at an average TS concentration of 14.7%
following dewatering at the SSWWTP.
CFPUA Residuals P rmi Permits
CFPUA currently possesses two residuals permits - Class A Residuals Permit
WQ0011869 and Class B Permit WQ0001271.
The Class A permit allows the conversion of a maximum of 8,270 DTPY of residuals
from the NSWWTP, SSWWTP, and SWTP into a maximum of 16,540 DTPY of Class
A EQ residuals for distribution using an alkaline stabilization process/system
located at the SSWWTP. No residuals were processed through this system during
CY 2021. This permit expires on 10.31.2025.
The Class B permit allows land application of a maximum of 8,270 DTPY of residuals
cake from the NSWWTP, SSWWTP, and SWTP onto permitted sites.
No residuals were land applied under this permit during CY 2021. During CY 2021,
approximately 28,701 CY were disposed of by landfilling. For the land
application permits, a total inventory of 2,964.97 acres on 107 sites is
currently identified/permitted within this permit. The permit expires on
03.31.2026.
CFPUA Residuals Management Contracting
In 2019, CFPUA transitioned to a direct in-house residuals management process
rather than contracting the services as done for the previous 30 years. Initially,
liquid residuals disposal was practiced, but cake residuals disposal has been the
preferred disposal method for most of that same period.

In continuing this approach, it is important to note the following goals:
♦ Factors such as wastewater infrastructure, regulatory impacts, and
market/economic climate must receive continuous assessment and may
result in changing technologies and quantity and quality of residuals.
♦ Due to the many regulatory and economic influences exerted beyond its
direct control, CFPUA embraces a policy of flexibility and diversity in its
overall residuals management strategy through development of other
residuals management processes and products.
♦ With the concerns of the emergence of PFAS known to be in CFPUA's
biosolids, as decided in 2019 lacking regulatory guidance, CFPUA
continues to be flexible in following these self-enforced
recommendations:
• Continue to landfill biosolids at least until the SWTP GAC treatment
facilities are operational. At that point, reevaluate levels of PFAS in
biosolids and regulatory framework for land application of biosolids to
determine return to land application is appropriate.
• Continue to characterize PFAS type and concentrations in wastewater
entering wastewater treatment plants.
• Research potential options for reducing PFAS concentrations in
wastewater

Monitoring Reduction Request Data Summary
M'Kean Maffitt WWTP Permit NCOO23973
NPDES Monitoring Data - January 1, 2019- December 31, 2021
CBOD mg/L Enterococcus #/100 ml TSS mg/L
Monthly limit 25.0 35 30.0
Weekly limit 40.0 276 45.0
CBOD mg/L Enterococcus #/100 ml TSS mg/L
50%of monthly limit= 12.5 17.5 15.0
3 year mean = 8.3 9.3 6.6
Is 3 year mean<50%of monthly
limit? Yes Yes Yes
200%of monthly limit= 50.0 60.0
#results>200%of monthly limit= 0 0
Are there more than 15 results>
200%of monthly limit? No No
200%of weekly limit= 552
#results>200%of weekly limit= 2
Are there more than 20 results>
200%of weekly limit? No
#weekly limits violations January
2019-December 2021= 0 0 0
Are there more than 2 non-monthly
average limit violations during
previous year? No No No