NC0088722_Permit Issuance_20200203

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
February 3, 2020
Don Chamblee, Director of Public Works
Lincoln County
115 West Main Street
Lincolnton, North Carolina, 28092
Subject:
Dear Mr. Chamblee:
Final NPDES Permit Renewal &
Expansion Modification
Permit NCO088722
Killian Creek WWTP
Lincoln County
Grade III/IV Biological WPCS
SIC Code 4952
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007
(or as subsequently amended).
The following changes were made to the draft permit sent to you on December 11, 2019:
• The three years for sampling in Special Condition A. (6.) have been changed to 2022,
2023, & 2024 from 2021-2023 so that effluent data is more recent at the next permit
renewal. Parameter codes have also been added to this condition.
• Additional electronic submittal language has been added to Special Conditions A. (5.)-
(6.).
• Upstream hardness sampling has been added to Special Condition A. (1.). See the
hardness -dependent metals comment below.
• Winter ammonia -nitrogen limits have been reduced to twice the summer limits in Special
Condition A. (2.) to comply with 15A NCAC 02B .0404.
• Special Condition A. (7.) Notification of Increased Flow was added to the permit. This
condition was in the previous permit and was mistakenly left out of the draft.
The final permit maintains the following significant changes identified in the letter sent on
December 11, 2019:
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mall Service Center I Raleigh, North Carolina 27699-1617
919.707.9000

• The NC 2007-2014 Water Quality Standards (WQS) Triennial Review was approved by
the NC Environmental Management Committee (EMC) on November 13, 2014. The US
EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions.
The NC Division of Water Resources NPDES Permitting Unit is required to implement the
new dissolved metal standards in all permits public noticed after April 6, 2016. The new
standards for most metals include acute standards. Further, the freshwater standards for
several metals are expressed as the dissolved form of the metals, and seven metals have
hardness -dependent equations. As a result, the NPDES Permitting Unit will need site -
specific effluent hardness data and instream hardness data, upstream of the discharge, for
each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness and instream hardness sampling, upstream of the discharge, have been added to
the permit at a monitoring frequency of quarterly. [See A. (1.)-A. (4.)]
• Total copper and total zinc did not show reasonable potential to exceed WQS at flow tiers
exceeding 2.5 MGD, but they did exceed 50% of the allowable discharge limits, therefore,
those parameters have been added for monitoring at a frequency of quarterly starting with
the flow tier of 3.35 MGD. [See A. (2.)-A. (4.)]
• Flow tiers of 4.9 MGD and 6.6 MGD for expansion have been added. Please note the new
limits for BOD, ammonia -nitrogen, dissolved oxygen, total nitrogen, and total phosphorus
at those tiers. [See A. (4.)-A. (5.)]
• The Lincoln County reported total silver and total selenium at less than detection, with
detection levels of <5.0 µg/L and <10.0 µg/L respectively in their Priority Pollutant
Analyses. The County's allowable discharge concentrations range (based on flow) from
0.078-0.108 µg/L for total silver and 6.6-9.0 µg/L for total selenium. DWR's laboratory
identifies the target Practical Quantification Limits (PQLs) for total silver and total
selenium as 1.0 jig/L. 15A NCAC 2B .0505 (e) (4) requires that all test procedures must
produce detection and reporting levels that are below the permit discharge requirements
and all data generated must be reported to the approved detection level or lower reporting
level of the procedure. If no approved methods are capable of achieving a detection level
below the permit discharge requirement (or allowable discharge concentration) the method
with the lowest detection level must be used. The County should use sufficiently sensitive
test methods for all pollutants, including when performing Effluent Pollutant
Scans/Priority Pollutant Analyses.
• Instream monitoring for dissolved oxygen and temperature have been added starting with
the 2.5 MGD flow tier. [See A. (1.)-A. (4.)]
• The monitoring frequencies for BOD, ammonia, pH, TSS, and temperature increases from
3/week to daily once the annual average flow exceeds 2.25 MGD. At this tier the facility
becomes a Grade 4 Biological Water Pollution Control System
• Some of the wording has changed in Special Condition A. (5.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A. (6.) has been modified to include the specific three years in which
the Effluent Pollutant. Scan shall be performed (2022, 2023, and 2024). In addition, at the
end of the Special Condition, 2nd species Toxicity Testing Requirements for municipal
permit renewals per Federal Regulations [40 CFR 122.210)(5)] have been added.
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A. (1.)-A. (4.)]
• Regulatory citations have been added to the permit.
Page 2 of 3

• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The requirement to continue reporting discharge
monitoring data electronically using the NC DWR's Electronic Discharge Monitoring
Report (eDMR) internet application has been added to your NPDES permit. [See A. (8.)]
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-
6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental regulations.
If you have any questions concerning this permit, please contact David Hill at [phone] or
via email at [e-mail].
Sincerely,
aniel Smith, r
ivisire fo
ion of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Hannah Headrick
DWR/Mooresville Regional Office/Water Quality
Page 3 of 3

Permit NCO088722
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Lincoln County
is hereby authorized to discharge wastewater from a facility located at the
Killian Creek WWTP
7085 Old Plank Road
Stanley
Lincoln County
to receiving waters designated as Killian Creek in the Catawba River Basin in accordance with
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I,
II, III and IV hereof.
This permit shall become effective March 1, 2020
This permit and authorization to discharge shall expire at midnight on February 28, 2025.
Signed this day February 3, 2020
ev S.Dqffiiel Smith, D46ct9f v
sion of Water Resources
By the Authority of the Environmental Management Commission

Permit NCO088722
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked. As of this permit issuance, any previously issued permit bearing this number is
no longer effective. Therefore, the exclusive authority to operate and discharge from this facility
arises under the permit conditions, requirements, terms, and provisions included herein.
Lincoln County is hereby authorized to:
1. Continue to operate and maintain an existing 3.35 MGD wastewater treatment facility
consisting of the following components:
• Bar screen and grit collection
• Dual sequencing batch reactors
• Post equalization basin
• Effluent tertiary disk filters
• Dual bank ultraviolet disinfection
• Aerobic digestion
• Sludge holding tank
• Sludge dewatering including rotary drum thickener and rotary sludge press
• Reaeration
This facility is located at the Killian Creek Wastewater Treatment Plant, 7085 Old Plank
Road, Stanley, Lincoln County, and
2. After receiving an Authorization to Construct, construct a new 4.9 MGD wastewater treatment
plant, and upon submitting an Engineer's Certification form, operate said treatment works;
3. After receiving an Authorization to Construct, construct a new 6.6 MGD wastewater treatment
plant, and upon submitting an Engineer's Certification form, operate said treatment works;
4. Discharge from said treatment works at the location specified on the attached map via Outfall
001 into Killian Creek, classified C waters in the Catawba River Basin.
2of13

Permit NCO088722
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [2.5 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade III
Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning on the effective date of the permit and lasting until the average flow for a
calendar year exceeds 2.25 MGD or expiration, whichever occurs fast, the permittee is authorized to
discharge treated municipal wastewater from Outfall 001. Such discharges shall be limited and
monitored' by the permittee as specified below:
PARAMETER CHARACTERISTICS
PARAMETER CODE
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locatiou2
Flow 50050
2.5 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C3 C0310
30.0 mg/L
45.0 mg/L
3/Week
Composite
I and E
Total Suspended Solids' C0530
30.0 mg/L
45.0 mg/L
3/Week
Composite
I and E
NH3 as N C0610
(Apr I - Oct 3 1
1.5 mg/L
4.5 mg/L
3/Week
Composite
E
NH3 as N C0610
(Nov 1- Mar 31
4.3 mg/L
1 12.9 mg/L
3/Week
Composite
E
pH 00400
Between 6.0 and 9.0 Standard Units
3/Week
Grab
E
Temperature °C 00010
Monitor and Report
31Week
Grab
E
Fecal Coliform 31616
(geometric mean
200/ 100 mL
400/100 mL
3/Wcek
Grab
E
Total Nitroen^ m C0600
Monitor and Report
Monthly
Composite
E
Total Phosphorus m C0665
Monitor and Report
Monthly
Composite
E
Chronic Toxici 3 TGP3B
Pass/Fail at 56%
Quarterly
Composite
E
Pollutant Scans NCO]
Monitor and Report
Footnote 6
Footnote 6
E
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Hardness ° Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Gmb
U
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (8.).
2. Sample locations I -Influent, E-Effluent, U-Upstream at least 50 feet upstream from the outfall, D-Downstream at
Old Plank Road. Upstream and downstream samples shall be grab samples collected 3/week during June, July,
August, and September and 11week during the remainder of the year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
5. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 56% with testing in January, April, July, October. See
Special Condition A. (5.).
6. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A. (6.).
7. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
3of13

Permit NCO088722
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [3.35 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning upon the average flow for a calendar year exceeding 2.25 MGD and lasting
until expiration or expansion, whichever occurs first, the permittee is authorized to discharge treated
municipal wastewater from Outfall 001. Such discharges shall be limited and monitored' by the permittee
as specified below:
PARAMETER CHARACTERISTICS
PARAMETER CODE
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location 2
Flow 50050
3.35 MGD
Continuous
Recording
I or E
BOD, 5 day, 200C3 C0310
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
Total Suspended Solids CO530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N C0610
Apr 1- Oct 31
1.3 mg/L
3.9 mg L
Daily
Composite
E
NH3 as N C0610
(Nov 1- Mar 31
2.6 mg/L
7.8 mg/L
Daily
Composite
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature °C 00010
Monitor and Report
Daily
Grab
E
Fecal Coliform 31616
(geometric mean
200/ 100 mL
400/100 mL
Daily
Grab
E
Total Nitrogen' m C0600
Monitor and Report
Monthly
Composite
E
Total Phosphorus m C0665
Monitor and Report
Monthly
Composite
E
Total Copper (µg/L) 01042
Monitor and Report
Quarterly
Composite
E
Total Zinc (µg/L) 01092
Monitor and Report
Quarterly
Composite
E
Chronic Toxici 3 TGP3B
Pass/Fail at 63%
Quarterly
Composite
E
Pollutant Scan6 NCO]
Monitor and Report
Footnote 6
Footnote 6
E
Hardness' Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 003001
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Hardness' Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (8.).
2. Sample locations I -Influent, E-Effluent, U-Upstream at least 50 feet upstream from the outfall, D-Downstream at
Old Plank Road. Upstream and downstream samples shall be grab samples collected 31week during June, July,
August, and September and 11week during the remainder of the year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
5. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 63% with testing in January, April, July, October. See
Special Condition A. (5.).
6. The permittee shall perform three effluent pollution scans during the tern of this permit. See Special Condition
A. (6.).
7. Effluent hardness shall be performed in conjunction with sampling for hardness -dependent metals (cadmium,
copper, lead, nickel, silver, zinc).
8. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
4of13

Permit NCO088722
A. (3.) EFFLUENT LINIITATIONS AND MONITORING REQUIREMENTS [4.9 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning upon receipt of an Engineer's Certification for expansion to 4.9 MGD and
the average flow for a calendar year exceeds 3.0 MGD and lasting until expansion or expiration,
whichever occurs first, the permittee is authorized to discharge treated municipal wastewater from Outfall
001. Such discharees shall be limited and monitored[ by the nermittee as snecified below:
PARAMETER CHARACTERISTICS
PARAMETER CODE
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow 50050
4.9 MGD
Continuous
Recording
I or E
BOD, 5 day,20°C3 C0310
5.0 mg/L
7.5 mg/L
Daily
Composite
I and E
Total Suspended Solids C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N C0610
1.0 mg/L
3.0 mg/L
Daily
Composite
E
Dissolved Oxygen 00300
Daily Average? 6.0 mg/L
Daily
Composite
E
H 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature °C 00010
Monitor and Report
Daily
Grab
E
Fecal Colifonn 31616
(geometric mean
200/ 100 mL
400/100 mL
Daily
Grab
E
Total Nitrogen C0600
(April -October)
6.0 mg/L
Weekly
Composite
E
TKN4 (mg/L) 00625
(April -October)
Monitor and Report
Weekly
Composite
E
NO3-N+NO2-N4 (mg/L) 00630
(April -October)
Monitor and Report
Weekly
Composite
E
Total Nitrogen (mg/L) C0600
(November -March)
Monitor and Report
Weekly
Composite
E
Total Phosphorus C0665
1.0 mg/L
Weekly
Composite
E
Total Copper (µg/L) 01042
Monitor and Report
Quarterly
Composite
E
Total Zinc (µg/L) 01092
Monitor and Report
Quarterly
Composite
E
Chronic Toxici 3 TGP3B
Pass/Fail at 7 1 %
Quarterly
Composite
E
Pollutant Scan6 NCO]
Monitor and Report
Footnote 6
Footnote 6
E
Hardness' Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 00300
Monitor and Report
Variable'
Grab
U and D
Temperature °C 00010
Monitor and Report
Variable'
Grab
U and D
Hardnesss Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Grab
U
Footnotes:
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (8.).
2. Sample locations I -Influent, E-Effluent, U-Upstream at least 50 feet upstream from the outfall, D-Downstream at
Old Plank Road. Upstream and downstream samples shall be grab samples collected 3/week during June, July,
August, and September and 1hveek during the remainder of the year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
5. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 71 % with testing in January, April, July, October. See
Special Condition A. (5.).
6. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A. (6.).
Footnotes for A. (3.) continued on next page:
5of13

Permit NCO088722
Footnotes continued for A. (3.):
7. Effluent hardness shall be performed in conjunction with sampling for hardness -dependent metals (cadmium,
copper, lead, nickel, silver, zinc).
8. The pennittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [6.6 MGD]
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV
Biological Water Pollution Control System [15A NCAC 08G .0302]
During the period beginning upon receipt of an Engineer's Certification for expansion to 6.6 MGD and
the average flow for a calendar year exceeds 4.4 MGD and lasting until expiration, the permittee is
authorized to discharge treated municipal wastewater from Outfall 001. Such discharges shall be limited
and monitored' by the permittee ass ecified below:
PARAMETER CHARACTERISTICS
PARAMETER CODE
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location2
Flow 50050
6.6 MGD
Continuous
Recording
I or E
BOD 5 day,20°C3 C0310
5.0 mg/L
7.5 mg/L
Daily
Composite
I and E
Total Suspended Solids C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N C0610
LO mg/L
3.0 mg/L
Daily
Composite
E
Dissolved Oxygen 00300
Daily Average> 6.0 mg/L
Daily
Composite
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Temperature °C 00010
Monitor and Report
Daily
Grab
E
Fecal Coliform 31616
(geometric mean
200/ 100 mL
400/100 mL
Daily
Grab
E
Total Nitrogen C0600
(April -October)
6.0 mg/L
Weekly
Composite
E
TKN4 (mg/L) 00615
(April -October)
Monitor and Report
Weekly
Composite
E
NO3-N+NO2-N4 (mg/L) 00630
(April -October)
Monitor and Report
Weekly
Composite
E
Total Nitrogen (mg/L) C0600
(November -March)
Monitor and Report
Weekly
Composite
E
Total Phosphorus C0665
1.0 mg/L
Weekly
Composite
E
Total Copper (µg/L) 01042
Monitor and Report
Quarterly
Composite
E
Total Zinc (µg/L) 01092
Monitor and Report
Quarterly
Composite
E
Chronic Toxici s TGP3B
Pass/Fail at 77%
Quarterly
Composite
E
Pollutant Scan6 NC01
Monitor and Report
Footnote 6
Footnote 6
E
Hardness? Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Composite
E
Dissolved Oxygen (mg/L) 00300
Monitor and Report
VariableZ
Grab
U and D
Temperature °C 00010
Monitor and Report
Variablez
Grab
U and D
Hardness' Total as CaCO3 (mg/L) 00900
Monitor and Report
Quarterly
Guab
U
Footnote for A. (4.) continued on next page:
6of13

Permit NCO088722
Footnotes for A. (4.):
1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR
application system. See Special Condition A. (8.).
2. Sample locations I -Influent, E-Effluent, U-Upstream at least 50 feet upstream from the outfall, D-Downstream at
Old Plank Road. Upstream and downstream samples shall be grab samples collected 3/week during June, July,
August, and September and 1/week during the remainder of the year.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
5. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 77% with testing in January, April, July, October. See
Special Condition A. (5.).
6. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A. (6.).
7. Effluent hardness shall be performed in conjunction with sampling for hardness -dependent metals (cadmium,
copper, lead, nickel, silver, zinc).
8. The permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be
representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for
hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (5.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [I 5A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at effluent concentrations of 56/63/71/77% for flows 2.5/3.35/4.9/6.6
MGD respectively.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
January, April, July, and October. These months signify the first month of each three-month toxicity
testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase H Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code
TGP313 for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
7of13

Permit NCO088722
Or, results can be sent to the email, ATForms.ATBAncdenr.gov.
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.
A. (6.) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 143-215.1(b)]
The permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2022, 2023, and 2024. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
parameters are present in concentrations greater than applicable standards and criteria. Samples should be
collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not
sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total
recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate / Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphoms
Total dissolved solids
Hardness
C0610
Trans-1,2-dichloroethylene
50060
1,1-dichloroethylene
00300
1,2-dichloropropane
00630
1,3-dichloropropylene
00625
Ethylbenzene
00556
Methyl bromide
C0665
Methyl chloride
70295
Methylene chloride
00900
1,1,2,2-tetrachloroethane
8of13
34546
Bis(2-chloroethyl) ether
34273
34501
Bis (2-chloroisopropyl) ether
34283
C0541
Bis (2-ethylhexyl) phthalate
CO1o0
77163
4-bromophenylphenyl ether
34636
34371
Butyl benzyl phthalate
34292
34413
2-chlomnaphthalme
34581
34418
4-chlorophenyl phenyl ether
34641
34423
Chrysene
34320
81549
Di-n-butyl phthalate
39110

Permit NCO088722
Antimony
01097
Tetrachloroethylene
34475
Di-n-octyl phthalate
34596
Arsenic
01002
Toluene
34010
Dibenzo(a,h)anthmcene
34556
Beryllium
01012
1,1,1-trichloroethane
34506
1,2-dichlorobenzene
34536
Cadmium
01027
1,1,2-trichloroethme
34511
1,3-dichlorobenzene
34566
Chromium
C0034
Trichloroethylene
39180
1,4-dichlorobenzene
34571
Copper
01042
Vinyl chloride
39175
3,3-dichlorobenzidine
34631
Lead
01051
Acid-exrracrable compounds:
Diethyl phthalate
34336
Mercury (Method 1631 E)
COMER
P-chloro-m-cresol
34452
Dimethyl phthalate
34341
Nickel
01067
2-chlorophenol
34586
2,4-dinitrotolume
34611
Selenium
01147
2,4-dichlorophenol
34601
2,64nitrotoluene
C0626
Silver
01077
2,4-dimethylphenol
34606
1,2-diphenylhydmzine
34346
Thallium
01059
4,6-dinitro-o-cresol
34657
Fluoranthene
C0376
Zinc
01092
2,4-dinitrophenol
34616
Fluorene
34381
Cyanide
00720
2-nitrophenol
34591
Hexachlorobenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexachlorobutadiene
C0702
Volatile oreanic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
34386
Acrolein
34210
Phenol
34694
Hexachloroethane
34396
Acrylonitrile
34215
2,4,6-trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
34403
Benzene
34030
Base -neutral compounds:
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
34428
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
34438
Chloroethane
85811
Benzo(a)anthmcene
C0526
N-nitrosodiphenylamine
34433
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1,2,4-trichlorobenzene
C0551
l,l-dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis(2-chloroethoxy) methane
34278
Reporting. Test results shall be reported electronically using the Division's eDMR system or on DWR
Form DMR-PPA-I(or on a form approved by the Director) by December 31" of each designated sampling
year. The Pemuttee must at least report completion of the test in the eDMR system by entering "1" or
"Y" for parameter code NCO - Annual Pollutant Scan. If utilizing the DWR Form submit to the
following address:
NC DEQ / DWR / NPDES Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Or the form may be uploaded at: httos://edocs.deg.nc.gov/Forms/NPDES W W-EDMR-Supplcmental-
Form
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal
facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to
additional tonicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5). The US EPA
requires four (4) toxicity tests for a test organism other than the test species currently required in this permit.
The multiple species tests should be conducted either quarterly for a 12-month period prior to submittal of
9of13

Permit NCO088722
the permit renewal application, or four tests performed at least annually in the four and one half year period
prior to the application. These tests shall be performed for acute or chronic toxicity, whichever is specified
in this permit. The multiple species toxicity test results shall be filed with the Aquatic Toxicology Branch
at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent to the email: ATForms.ATB(a)ncdenr.gov.
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E (Toxicity
Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal application to
the NPDES Permitting Unit.
A. (7.) NOTIFICATION OF INCREASE IN FLOW [G.S. 143-215.1(a)]
The permitte shall inform the Division when the flow average for the calendar year reaches the designated
flow triggers in Special Conditions A. (1.) - A. (4.). A letter shall be submitted to the Mooresville
Regional Office and the NPDES permitting group at the following addresses:
Water Quality Regional Operations Supervisor
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Compliance and Expedited NPDES Permitting Unit
Atm. Charles Weaver
1617 Mail Service Center
Raleigh, NC 27699-1617
A. (8.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,
2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Reportine Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)I
10 of 13

Permit NC0088722
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing, signing,
and submitting one signed original and a copy of the computer printed eDMR to the following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband access,
then a temporary waiver from the NPDES electronic reporting requirements may be granted and
discharge monitoring data may be submitted on paper DMR forms (MR 1,1.1, 2, 3) or alternative forms
approved by the Director. Duplicate signed copies shall be submitted to the mailing address above.
See "How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the initial
recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each
type of electronic submission and for each state. Instructions on how to access and use the appropriate
electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting
11 of 13

Permit NC0088722
Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-
pollutant-discharge-el imination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Reguest a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers must be submitted in writing to the
Division for written approval at least sixty (60) days prior to the date the facility would be required
under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver
shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be
submitted electronically to the Division unless the permittee re -applies for and is granted a new
temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not
transferrable. Only permittees with an approved reporting waiver request may submit monitoring data
and reports on paper to the Division for the period that the approved reporting waiver request is
effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://dw.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11,
Section B. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section
B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting
purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North Carolina's
eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following
web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION
WILL BE ACCEPTED:
"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
fines and imprisonment for knowing violations."
12 of 13

Permit NCO088722
5. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time [40 CFR 122.41].
13 of 13

'700
55
Outfall 001 nil
Cha
& Facility
0
�. \% / `)� /71 Ch Rock Hi
;CO
10
N I
'4V sly 780, 1.0
wovik�
00
t
#
04.
OP
p
Latitude: 35*252V
Longitude; 81'01'50" NCO088722 Facility A
USGS Quad: Lowesville Lincoln County Location
Stream Class: C Killinn Creek VVIWT?
Subbasin: 03-08-33 HUC: 03050101 T�O�S �C
Receiving Stream: Killian Creek North MAP NOT

Fact Sheet
NPDES Permit No. NCO088722
Permit Writer/Email Contact David Hill, [e-mail]:
Date: October 30, 2019
Division/Branch: NC Division of Water Resources/NPDES Complex Permitting
Fact Sheet Template: Version 09Jan2017
Permitting Action:
D Renewal
® Renewal with Expansion
0 New Discharge
O Modification (Fact Sheet should be tailored to mod request)
Note: A complete application should include the following:
• For New Dischargers, EPA Form 2A or 21) requirements, Engineering Alternatives Analysis, Fee
• For Existing Dischargers (POTW), EPA Form 2A, 3 effluent pollutant scans, 4 21d species WET
tests.
• For Existing Dischargers (Non-POTW), EPA Form 2C with correct analytical requirements based
on industry category.
Complete applicable sections below. If not applicable, enter NA.
1. Basic Facility Information
Facility Information
Applicant/Facility Name:
Lincoln County/Killian Creek WWTP
Applicant Address:
115 West Main Street, Lincolnton, NC28092
Facility Address:
7085 Old Plank Road, Stanley, NC 28164
Permitted Flow:
1.68/2.5/3.35 MGD Current + 4.9/6.6 MGD expansion
Facility Type/Waste:
Major Municipal. 100% Domestic
Facility Class:
Class EM
Treatment Units:
Bar screen/grit collection, Dual SBR, Post equalization basin, Effluent
tertiary disk filters, UV disinfection, Aerobic digestion, sludge holding
tank, sludge dewatering, reaeration
Pretreatment Program (Y/l)
N
County:
Lincoln
Region
Mooresville
Briefly describe the proposed permitting action and facility background: Lincoln County has applied
for an NPDES permit renewal of the Killian Creek WWTP at 3.35 MGD with expansion to 6.6
MGD in an application submitted May 2018. An Engineering Alternatives Analysis(EAA) was
Page 1 of 10

provided with the application. Additional information for the application and EAA was requested
with additional supporting documents supplied in February and October 2019 while the County
pursued additional funding from the Division of Water Infrastructure(DWI). An Engineer's
Certification stamped July 21, 2016 was received for the completion of expansion upgrades to 3.35
MGD under AtC 088722A02. Application I&I was estimated at 21gpd/capita or 228gpd/im pipe.
2. Receiving Waterbody Information:
Receiving Waterbody Information
Outfalls/Receiving Stream(s):
Outfall 001 — Killian Creek
Stream Segment:
11-119-2-(0.5)
Stream Classification:
C
Drainage Area (m?):
46.8
Summer 7Q 10 (cfs)
3.1
Winter 7Q 10 (cfs):
7.5
30Q2 (cfs):
10.8
Average Flow (cfs):
53
IWC (% effluent):
56/63/71/77% @ 2.5/3.35/4.9/6.6 MGD
303(d) listed/parameter:
No
Subject to TMDL/parameter:
Yes- State wide Mercury TMDL implementation. Lake Wylie
TMDL (see section 6)
Basin/Sub-basin/HUC:
Catawba/030833/03050101
USGS Topo Quad:
G17NE
Flows updated -USGS June 2, 2017
3. Effluent Data Summary
Effluent data for Outfall 001 is summarized below for the period of January 2016 through April 2019.
Table 1. Effluent Data Summary Outfall. 001
Permit
Parameter
Units
Average
Max
Min
Limit
Flow
MGD
1.0
2.41
0.014
MA 1.68+
BOD
mg/L
6.5
5658.80
< 2
WA 45
MA 30
NH3N summer
mg/L
0.93
17.5
< 0.5
WA 5.1
MA 1.7
WA 5.5
NH3N winter
mg/L
0.76
17.4
< 0.5
MA 16.5
Page 2 of 10

TSS
mg/L
2.9
24
< 2.5
WA 45.0
MA 30.0
pH
SU
7.2
7.73
6.7
6.0 >_ pH:5
9.0
Fecal coliform
#/100 ml
60.8
950
< 2
(geometric)
WA 400
MA 200
Dissolved Oxygen (DO)
mg/L
8.5
10.6
6.2
DA >_5.0
Temperature
° C
19.9
28
12
TN
mg/L
4.12
10.6
1.5
TP
mg/L
3.73
8.83
0.9
Total Zinc
mg/L
70.2
119
0.1
MA -Monthly Average, WA -Weekly Average, DM -Daily Maximum, DA=Daily Average
4. Instream Data Summary
Instream monitoring may be required in certain situations, for example: 1) to verify model predictions
when model results for instream DO are within 1 mg/L of instream standard at full permitted flow; 2) to
verify model predictions for outfall diffuser; 3) to provide data for future TMDL; 4) based on other
instream concerns. Instream monitoring may be conducted by the Permittee, and there are also
Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee (in
which case instream monitoring is waived in the permit as long as coalition membership is maintained).
If applicable, summarize any instream data and what instream monitoring will be proposed for this
permit action: The current permit does not require instream monitoring. Instream monitoring for
DO and temperature will be required upon expansion to 4.9 and 6.6 MGD because the predicted
DO sag is within 1 mg/L of the instream standard of 5 mg/L. To gauge the effect of the discharge on
the stream as flows increase, instream monitoring will be added to the 2.5 and 3.35 MGD flow tiers.
The DO minimum predicted in the Level B model for the expanded flows occurs at the outfall. The
downstream station at Old Plank Road is approximately 0.6 miles below the outfall. DO at this
location is predicted to be similar to that at the outfall and should provide good representation of
the discharge's effects on Killian Creek. This section of Killian Creek is not listed as impaired.
However, the headwaters of Killian Creek and Forney Creek at less than a mile above and draining
to this segment are impaired for exceeding fish community criteria.
Is this facility a member of a Monitoring Coalition with waived instream monitoring (YIN): NO
Name of Monitoring Coalition: NA
5. Compliance Summary
Summarize the compliance record with permit effluent limits (past 5 years): The facility reported 9
ammonia limit violations from 2016-current, with the violations occurring in 2018 and 2019.
Summarize the compliance record with aquatic toxicity test limits and any second species test results
(past 5 years): The facility passed 18 of 19 quarterly chronic toxicity tests, as well as all 4 second
Page 3 of 10

species toxicity tests. The October 2018 failure was followed by two consecutive passing multi -
concentration tests.
Summarize the results from the most recent compliance inspection: The last facility inspection
conducted in October 2019 reported that the facility was well maintained and operated.
6. Water Quality -Based Effluent Limitations (WQBELs)
Dilution and Mixing Zones
In accordance with 15A NCAC 2B.0206, the following streamflows are used for dilution considerations
for development of WQBELs: 1 Q 10 streamflow (acute Aquatic Life); 7Q 10 streamflow (chronic Aquatic
Life; non -carcinogen HH); 30Q2 streamflow (aesthetics); annual average flow (carcinogen, W.
If applicable, describe any other dilution factors considered (e.g., based on CORMLXmodel results): NA
If applicable, describe any mixing zones established in accordance with 15A NCAC 2B.0204(b): NA
Oxygen -Consuming Waste Limitations
Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to
ensure protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits
(e.g., BOD= 30 mg/L for Municipals) may be appropriate if deemed more stringent based on dilution and
model results.
If permit limits are more stringent than TBELs, describe how limits were developed: Limitations for
BOD are based on a 2017 Streeter Phelps model (Level B) for instream DO protection at the
expanded flows of 4.9 and 6.6 MGD. Flow tiers up to 3.35 MGD have secondary limits which had
been verified by prior Level B models.
Ammonia and Total Residual Chlorine Limitations
Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of
1.0 mg/L (summer) and 1.8 mg/L (winter). Acute ammonia limits are derived from chronic criteria,
utilizing a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals.
Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection
of aquatic life (17 µg/L) and capped at 28 µg/L (acute impacts). Due to analytical issues, all TRC values
reported below 50 µg/L are considered compliant with their permit limit.
Describe any proposed changes to ammonia andlor TRC limits for this permit renewal: Ammonia -
nitrogen limits are based on a Level B model for DO protection at expanded flows. Ammonia limits
through the 3.35 MGD tier were based on previous wasteload allocations. The winter ammonia
limit in the 3.35 MGD flow tier has been reduced to twice the summer limit to comply with 15A
NCAC 2B .0404. The facility uses W disinfection so TRC limits do not apply.
Reasonable Potential Analysis (RPA) for Toxicants
The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC
RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero
background; 3) use of %2 detection limit for "less than" values; and 4) streamflows used for dilution
consideration based on 15A NCAC 213.0206. Effective April 6, 2016, NC began implementation of
Page 4 of 10

dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10, 2016.
A reasonable potential analysis was conducted on effluent toxicant data collected between January 2016
and April 2019. Pollutants of concern included toxicants with positive detections and associated water
quality standards/criteria. Based on this analysis, the following permitting actions are proposed for this
permit:
• Effluent Limit with Monitoring. The following parameters will receive a water quality -based
effluent limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable
water quality standards/criteria: None.
• Monitoring Only. The following parameters will receive a monitor -only requirement since they
did not demonstrate reasonable potential to exceed applicable water quality standards/criteria,
but the maximum predicted concentration was >50% of the allowable concentration: Zinc (for
flow >2.5 MGD), Copper* (for flow > 2.5 MGD).
• No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since
they did not demonstrate reasonable potential to exceed applicable water quality
standards/criteria and the maximum predicted concentration was <50% of the allowable
concentration: None.
• POTW Effluent Pollutant Scan Review: Three effluent pollutant scans were evaluated for
additional pollutants of concern.
o The following parameter(s) will receive a water quality -based effluent limit (WQBEL)
with monitoring, since as part of a limited data set, two samples exceeded the allowable
discharge concentration: None.
o The following parameter(s) will receive a monitor -only requirement, since as part of a
limited data set, one sample exceeded the allowable discharge concentration: None.
*Based on a limited data set (n=3) with one known value (9 µg/L) at approximately 1/ the
allowable stream standard for stream hardness values of 25-50 mg/L at flows > 2.5 MGD.
Positive detections reported on the application were verified against laboratory reports. Selenium
and silver need to be reported to lowest PQLs for future PPAs.
Toxicity Testing Limitations
Permit limits and monitoring requirements for Whole Effluent Toxicity (WET) have been established in
accordance with Division guidance (per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits
issued to Major facilities or any facility discharging "complex" wastewater (contains anything other than
domestic waste) will contain appropriate WET limits and monitoring requirements, with several
exceptions. The State has received prior EPA approval to use an Alternative WET Test Procedure in
NPDES permits, using single concentration screening tests, with multiple dilution follow-up upon a test
failure.
Describe proposed toxicity test requirement: This is a Major POTW, and chronic WET limits at
45/56/63/71/77% effluent for flows of 1.68/2.5/3.35/4.9/6.6 MGD will continue on a quarterly
frequency.
MercM Statewide TMDL Evaluation
There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply
with EPA's mercury fish tissue criteria (0.3 mg/kg) for human health protection. The TMDL established a
wasteload allocation for point sources of 37 kg/year (81 lb/year), and is applicable to municipals and
industrial facilities with known mercury discharges. Given the small contribution of mercury from point
sources (^2% of total load), the TMDL emphasizes mercury minimization plans (MMPs) for point source
control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (>1 ng/L) will
Page 5 of 10

receive an MMP requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a
pollutant of concern. Effluent limits may also be added if annual average effluent concentrations exceed
the WQBEL value (based on the NC WQS of 12 ng/L) and/or if any individual value exceeds a TBEL
value of 47 ng/L
Table 2. Mercury Effluent Data Summary
2016
2017
2019
-Mercury
Maximum Conc., n
< 0.5
2.11
5.62
TBEL, n
47
WQBEL, n
26.5-15.6 2.5-6.6 MGD
Describe proposed permit actions based on mercury evaluation: Since no annual average mercury
concentration exceeded the WQBEL, and no individual mercury sample exceeded the TBEL, no
mercury limit is required. As the facility is discharging < 2MGD, no NEWP will be required at this
time.
Other TMDL/Nutrient Management Strategy Considerations
If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation
within this permit: Killian Creek drains to the Catawba River as part of the Lake Wylie
impoundment. Lake Wylie is impaired for Chlorophyll a. A TMDL was approved in February 1996
which specifies TN limits of 6 mg/L (summer) and 1 mg/L TP for new and expanding dischargers to
this section of the Lake Wylie watershed.
Other WQBEL Considerations
If applicable, describe any other parameters of concern evaluated for WQBELs: NA
If applicable, describe any special actions (HQW or OR99 this receiving stream and classification shall
comply with in order to protect the designated waterbody. NA
If applicable, describe any compliance schedules proposed for this permit renewal in accordance with
15A NCAC 2H. 0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo: NA
If applicable, describe any water quality standards variances proposed in accordance with NCGS 143-
215.3(e) and 15A NCAC 2B. 0226 for this permit renewal: NA
7. Technology -Based Effluent Limitations (TBELs)
Municipals (if not applicable, delete and skip to Industrials)
Are concentration limits in the permit at least as stringent as secondary treatment requirements (30 mg1L
BOD51TSSfor Monthly Average, and 45 mg/L for BOD51TSSfor Weekly Average). YES
If NO, provide a just fication for alternative limitations (e.g., waste stabilization pond). NA
Are 85% removal requirements for BOD51TSS included in the permit? YES
If NO, provide a justication (e.g., waste stabilization pond). NA
S. Antidegradation Review (New/Expanding Discharge):
The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not
degrade water quality. Permitting actions for new or expanding discharges require an antidegradation
Page 6 of 10

review in accordance with 15A NCAC 2B.0201. Each applicant for a new/expanding NPDES pdrmit
must document an effort to consider non -discharge alternatives per 15A NCAC 2H.0105( c)(2). In all
cases, existing instream water uses and the level of water quality necessary to protect the existing use is
maintained and protected.
If applicable, describe the results of the antidegradation review, including the Engineering Alternatives
Analysis (EAA) and any water quality modeling results:
To support the proposed expansion, Lincoln County provided an EAA in April 2018. The Division
requested additional information on the 20-year cost for land application/water reuse and was
provided with an updated EAA in February 2019. The alternatives evaluated included no action,
connection to another WWTP, land application and water reuse, and expansion of the existing
discharge. Connection to another facility was determined to be infeasible due to the need for
additional transmission infrastructure and expansion of the nearest potential receiving WWTP
above its currently permitted capacity. No action was deemed infeasible based on population
growth estimates and current permitted capacity commitments. Land application was determined
to be economically infeasible based on typical piedmont soil hydraulics and the total amount of land
needed for irrigation; >1,400 acres not including buffers, setbacks, and storage ponds, in addition
to the cost of treatment plant upgrades. Expansion of the existing SBR system was determined to be
the most economical alternative. The Division concurs with this alternative.
Table 3.20-Year Present Worth Alternative Costs
Alternative
20 PVCA
Water Reuse & Land Application
$87,232,264
Expansion of existing SBR WWTP-surface discharge
$48,881,394
Expansion with MBR-surface discharge
$60,776,592
The EAA also provided population projections based on four scenarios which included population
by: % land area, % of 2013 population, township(s) growth, and the Metrolina Community Viz
model. The third scenario was chosen as most applicable after objection from the DWI over the
County's original choice of the Metrolina model. The total expanded capacity accounted for the
projected growth rate in scenario three along with committed permitted flows of existing capacity,
extension of service in the County's Long -Range Capital Improvement Plan, industrial/commercial
flow, and internal plant recycle. This coverage area is experiencing growth due to the proximity to
Lake Norman, Charlotte -Mecklenburg and Hickory growth, and highway
extensions/improvements. This WWTP also exists due to the regionalization of two prior WWTPs
under the Lincoln County 2007 201 Facilities Plan and the resultant closure of the Forney Creek
WWTP. The Division concurs with the projected flows.
The County is receiving money through DWI's Clean Water State Revolving Fund and were
subject to the State Environmental Policy Act (SEPA) review. An Environmental Assessment(EA)
was prepared and reviewed with a Finding of No Significant Impact on August 16, 2019 and
reissued November 2019 after DWI requested amendments to the EA.
Limits for the expanded flows were developed using a Level B model (Streeter -Phelps model with
NC regional specific parameters). Further discussion on the results can be found in sections 4 and
6.
9. Antibacksliding Review:
Page 7 of 10

Sections 402(o)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit
backsliding of effluent limitations in NPDES permits. These provisions require effluent limitations in a
reissued permit to be as stringent as those in the previous permit, with some exceptions where limitations
may be relaxed (e.g., based on new information, increases in production may warrant less stringent TBEL
limits, or WQBELs may be less stringent based on updated RPA or dilution).
Are any effluent limitations less stringent than previous permit (YES/NO): NO
If YES, confirm that antibackslidingprovisions are not violated: NA
10. Monitoring Requirements
Monitoring frequencies for NPDES permitting are established in accordance with the following
regulations and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 2B.0500; 2)
NPDES Guidance, Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance,
Reduction of Monitoring Frequencies for Exceptionally Performing Facilities (10/22/2012 Memo); 4)
Best Professional Judgement (BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are
not considered effluent limitations under Section 402(o) of the Clean Water Act, and therefore anti -
backsliding prohibitions would not be triggered by reductions in monitoring frequencies.
For instream monitoring, refer to Section 4.
11. Electronic Reporting Requirements
The US EPA NPDES Electronic Reporting Rule was finalized on December 21, 2015. Effective
December 21, 2016, NPDES regulated facilities are required to submit Discharge Monitoring Reports
(DMRs) electronically. Effective December 21, 2020, NPDES regulated facilities will be required to
submit additional NPDES reports electronically. This permit contains the requirements for electronic
reporting, consistent with Federal requirements.
12.Summary of Proposed Permitting Actions:
Table 4. Current Permit Conditions and Proposed Changes 1.68-6.6 MGD
Parameter
Current Permit
Proposed Change
Basis for Condition/Change
Flow
MA 1.68-3.35 MGD
Add 4.9 and 6.6 MGD
Expansion. 15A NCAC 2B .0505
tiers, remove 1.68
MGD tier
BODS
MA 30 mg/L
MA 5 mg/L
WQBEL. Based on protection of DO
WA 45 mg/L
WA 7.5 mg/L
standard. 15A NCAC 2B.0200
(@4.9/6.6 MGD)
NH3-N
Summer:
MA 1 mg/L
WQBEL. Based on protection of
MA 1.7-1.3 mg/L
WA 3 mg/L
DO standard, 15A NCAC 213.0200
WA 5.1-3.9 mg/L
(@4.9/6.6 MGD)
Winter:
MA 5.5-3.5 mg/L
WA 16.5-10.5 m
TSS
MA 30 mg/L
No change
TBEL. Secondary treatment
WA 45 mg/L
standards/40 CFR 133 / 15A NCAC
2B .0406
Page 8 of 10

Fecal coliform
MA 200 /100m1
No change
WQBEL. State WQ standard, 15A
WA 400 /100ml
NCAC 2B.0200
DO
None
> 6 mg/L Daily Ave.
WQBEL. Based on protection of
(@4.9/6.6 MGD)
DO, 15A NCAC 2B .0200
pH
6-9 SU
No change
WQBEL. State WQ standard, 15A
NCAC 2B .0200
Total Nitrogen
Monitor Only
6 mg/L (Apr -Oct)
WQBEL. Required individual
(@4.9/6.6 MGD)
TN/TP nutrient limits 1996 Lake
Add TKN and
Wylie TMDL and to comply with
Nitrate/Nitrite
NC chl-a WQS. 15A NCAC
monitoring
2B.0200. Monitoring requirement
15A NCAC 02B .0508
Total Phosphorus
Monitor Only
1 mg/L
WQBEL. Required individual
TN/TP nutrient limits 1996 Lake
(@4.9/6.6 MGD)
Wylie TMDL and to comply with
NC chl-a WQS, 15A NCAC
2B.0200. Monitoring requirement
15A NCAC 02B .0508
Total Copper
None
Quarterly Monitoring
Reasonable potential to exceed WQS
starting at 3.35 MGD
15A NCAC 02B at flow > 2.5 MGD
tier
Total Zinc
Quarterly Monitoring
No change
Reasonable potential to exceed WQS
15A NCAC 02B
Hardness
None
Effluent and Upstream
Requirement for hardness -dependent
Quarterly Monitoring
metals, 15ANCAC 02B
Toxicity Test
Chronic limit,
56/63/71/77% @
WQBEL. No toxics in toxic
52/56/68% effluent
2.5/3.35/4.9/6.6 MGD
amounts. 15A NCAC 2B.0200 and
15A NCAC 2B.0500
Effluent Pollutant
Three per permit cycle
No change
40 CFR 122
Scan
Instream
None
Add instream
DO sag within 1 mg/L of standard.
Monitoring
DO/Temperature at
Water -quality based monitoring
2.5 MGD tier
requirement 15A NCAC 02B .0508
Electronic
No requirement
Add Electronic
In accordance with EPA Electronic
Reporting
Reporting Special
Reporting Rule 2015.
Condition
MGD — Million gallons per day, MA - Monthly Average, WA — Weekly Average, DM — Daily Max
13. Public Notice Schedule:
Permit to Public Notice: December 18, 2019
Page 9 of 10

Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following
the publication date of the public notice. Any request for a public hearing shall be submitted to the
Director within the 30 days comment period indicating the interest of the party filing such request and the
reasons why a hearing is warranted.
14. Fact Sheet Addendum (if applicable):
Were there any changes made since the Draft Permit was public noticed (Yes/No): Yes
If Yes, list changes and their basis below:
• The three years for sampling in Special Condition A. (6.) have been changed to 2022,
2023, & 2024 from 2021-2023 so that effluent data is more recent at the next permit
renewal. Parameter codes have also been added to this condition.
• Additional electronic submittal language has been added to Special Conditions A. (5.)-
(6.).
• Upstream hardness sampling has been added to Special Condition A. (1.) to satisfy
hardness -dependent metals standards.
• Winter ammonia -nitrogen limits have been reduced to twice the summer limits in Special
Condition A. (2.) to comply with 15A NCAC 02B .0404.
• Special Condition A. (7.) Notification of Increased Flow was added to the permit. This
condition was in the previous permit and was mistakenly left out of the draft.
15. Fact Sheet Attachments (if applicable):
• RPA Spreadsheet Summary
• Dissolved Metals Implementation/Freshwater or Saltwater
• WET results
• Limit Violations Report
Page 10 of 10

Table 1
Facility Name
W WTP/WTP Class
NPDES Permit
Outfall
Flow, Ow (MGD)
Receiving Stream
HUC Number
Stream Class
Apply WS Hardness WQC
7Q10s (cfs)
70110w (cfs)
3002 (cfs)
QA (cfs)
1G10s (cfs)
Effluent Hardness
Upstream Hardness
Combined Hardness Chronic
Combined Hardness Acute
Data Sources)
"CHECK TO APPLY MODEL
Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
t Information
EJCHECK IF HQW OR ORW WQS
Killian Creek WWTP
NC0088722
001
2.500
Killian Creek
C
3.10
7.50
10.80
53.00
2.59
50.23 mg/1- (Avg)
25 mg/L (Avg)
39.02 mg/L
40.12 mg/L
Fer01
Fri
Pri
Par04
Par05
ParG6E
Par07
Pil
Parts
Par-10
Peril
Par12
Par13
Par14
Part
Parts
PaH7
Pri
Parts
Par20
Par21
Pal
Par23
Pri
Table 2. Parameters of Concern
Name wos Type Chronic Modifier Acute PCL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health Water Supply
C
10
HHANS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic. Life
NC
0.8259
FW
4.8961
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
11, Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NCI
300 1
A
I
ug/L
Chromium 111
Aquatic Life
NC
169.5253
FW
1333.4184
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
11.5282
FW
16.3539
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
4.8457
FW
128.2880
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
54.2583
FW
500.1975
pg/L
Nickel
water supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.6688
ug/L
Zinc
Aquatic Life
NC
184.7994
FW
187.6924
ug/L
2.5_88722RPA2019, input
10/18/2019

Killian Creek WWTP
NCO088722
Freshwater RPA -
Qw (MGD) = 2.5000
IQ10S (cfs) = 2.59
7Q10S (cfs) = 3.10
7Q10W (cfs) = 7.50
30Q2 (cfs) = 10.80
Avg. Stream Flow, QA (cfs) = 53.00
Receiving Stream: Killian Creek
95% Probability195% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
WWTP/WTP Class: III
[WC% @ IQIOS = 59.93812838
IWC% @ 7Q IOS = 55.55555556
IWC% @ 7Q10W = 34.06593407
IWC% @ 30Q2 = 26.40545145
IW%C @ QA = 6.813186813
Stream Class: C
Outfall 001
Qw=2.5MGD
COMBINED HARDNESS (mg/L)
Acute = 40.12 mg/L
Chronic = 39.02 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
N
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
A
~
Z)
Chronic Stands Acute
n # Det. Max Pred Cw Allowable Cw
Acute (FW): 567.3
Arsenic
C
150 FW(7QIOs) 340
ug/L
----------------------------------
0 0
N/A
Chronic (FW): 270.0
Arsenic
C
10 HH/WS(Qavg)
ug/L
Chronic (HH) 146.8
-
Acute: 108.45
Beryllium
NC
6.5 FW(7QIOs) 65
ug/L
0 0
N/A
_ _ ____ ___
___________:`____________:
Chronic: 11.70
Acute: 8.169
Cadmium
NC
0.8259 FW(7QIOs) 4.8961
ug/L
0 0
NIA
_ _____________
_ ________ ---------
Chronic: 1.487
Acute: NO WQS
Chlorides
NC
230 FW(7QIOs)
mg/L
0 0
N/A
_ _ -------------------
.0
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(30Q2)
ug/L
0 0
N/A
_ _______ ___
--------------- ------
Chronic: 3.8
Acute: NO WQS
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
0 0
NIA
_ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Chronic: 1,136.1
Acute: 2,224.7
Chromium [[I
NC
169.5253 FW(7QIOs) 1333.4184
µg/L
0 0
N/A
----------------
Chronic: 305.1
Acute: 26.7
Chromium VI
NC
11 FW(7QIOs) 16
µg/L
0 0
N/A
_ _
C hronic: 19.8
Chromium, Total
NC
µg/L
0 0
N/A
2.5 88722RPA2019, rpa
Page 3 of 5 10/18/2019

Killian Creek WWTP a Outfall 001
NCO088722 Freshwater RPA- 95% Probabilitv/95% Confidence USina Metal TrnnSlntnrc nr.r - 9 c nnr_n
:Aanc '_7.2S
Copper
NC
11.5282 FW(7QIOs) 16.3539
ug/l.
3 1
27.00
Note: n <Y
(default)
____ _
Chronic: 20.75
see factsheei, section 6 Reasonable Potential
Limited data set
No value> Allowable Cw
Analysis
Acute: 36.7
Cyanide
NC
5 FW(7QIOs) 22
10
ug/L
0
Acute: NO WQS
Fluoride
NC
1800 FW(7QIOs)
ug/L
0 n
\
__Chronic: _540.0__
_____._._____________.____
Acute: 214.034
Lead
NC
4.8457 FW(7QIOs) 128.2880
ug/L
0 0
N/A
__Clvonic:
Acute: NO WQS
Mercury
NC
12 FW(7QIOs)
0.5
ng/L
0 0
N/A
_ _ _ __
____________________
Acute: NO WQS
Molybdenum
NC
2000 HH(7QIOs)
ug/L
0 o
N/A
_
--Chronic:----3,600.0--
------------
Acute (FW): 834.5
Nickel
NC
54.2583 FW(7QIOs) 500.197$
pg/L
0 U
N/A
Chronic(FW)---97.7 --
---_----- --
Nickel
NC
25.0000 WS(7QIOs)
pg/L
Chronic (W5) 4$.0
Acute: 93.4
Selenium
NC
5 FW(7QlOs) _ 56
ug/L
0 0
N/A
Acute: 1.116
Silver
NC
0.06 FW(7QIOs) 0.6688
ug/L
0 f)
N/A
_
__Chronic: ____0.108 __
----
Acute: 313.1
zinc
NC
184.7994 FW(7QIOs) 187.6924
ug/L
14 14
161.8
___ _
Chronic: 332.6
No RP, Predicted Max<50%of Allowable Cw-No
No value> Allowable Cw
Monitoring required
Acute:
n
N/A
__Chron_ _
ic:__________
Acute:
f) 0
N/A
__C_h_
ronic:__________
Acute:
2.5_88722RPA2019, rise
Pn9c n a15 10/18/2019

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
[]CHECK IF HQW OR ORW WQS
Facility Name
Killian Creek WWTP
WWTP/WTP Class
III
NPDES Permit
NC0088722
Outfall
001
Flow, Qw (MGD)
3.350
Receiving Stream
Killian Creek
HUC Number
_
Stream Class
C
3.10
❑Apply WS Hardness WQC
7410s (cfs)
7Q10w (cfs)
7.50
30Q2 (cfs)
10.80
CIA (cfs)
53.00
2.59
1 Q10s (cfs)
Effluent Hardness
50.23 mg/L (Avg)
_—_______
.____________
Upstream Hardness
________.-._
_ _ _ _ _ _ _ 25 mg/L.
Combined Hardness Chronic
40.8 mg/L
Combined Hardness Acute
_ _ _ _ _ _ _ _
41.84 ri
____________________
Data Source(s)
❑CHECK TO APPLY MODEL
Perot
Paro2
Par03
Par04
Par05
Pari
Pori
Par08
Par09
Part
Peril
Par12
Par13
Par14
Par15
Par16
Part?
Pri
Par19
Par2o
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name was Type Chronic Modifier Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HHANS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Lit.
NC
0.8543
FW
5.0778
ug/L
Chlorides
Aquatic uf.
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
Water Supply
NCI
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NCI
300
A
ug/L
Chromium III
Aquatic Life
NC
175.8397
FW
1379.8194
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
11.9766
FW
17.0103
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
5.0932
FW
134.4025
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
1
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
56.3472
FW
518,1877
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
1
Silver
Aquatic Life
NC
0.06
FW
0,7186
ug/L
Zinc
Aquatic Life
NC
191.9252
FW
194.4535
ug/L
3.3_88722RPA2019, input
10/18/2019

Killian Creek WVVTP z
NCO088722 Freshwater RPA - 95% Probability195% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) = 3.3500 WWTP/WTP Class: III
1Q10S (cfs) = 2.59 IWC% @ IQ10S = 66.72020559
7Q IOS (cfs) = 3.10 IWC% @ 7Q 1 OS = 62.61682243
7QIOW (cfs) = 7.50 IWC%@ 7Q10W = 40.90998621
30Q2 (cfs) = 10.80 IWC% @ 30Q2 = 32.46834454
Avg. Stream Flow, QA (cfs) = 53.00 IW%C @ QA = 8.922971173
Receiving Stream: Killian Creek Stream Class: C
Outfall 001
Qw = 3.35 MGD
COMBINED HARDNESS (mPJL)
Acute = 41.84 mg/L
Chronic = 40.8 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
F
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
a
2
n
ed
Chronic AcuteAcute
n # Det. Max Pred Cw Allowable Cw
Standard
Acute (FW): 509.6
Arsenic
C
150 FW(7Q10s) 340
ug/L
---------------------------------------------
0 0
N/A
Chronic (FW) 239.6
Arsenic
C
10 HHIWS(Qavg)
ug/L
Chronic (HH) 112.1
-
Acute: 97.42
Beryllium
NC
6.5 FW(7Q1Os) 65
ug/L
0 0
N/A__
-
Chronic: 10.38
Acute: 7.611
Cadmium
NC
0.8543 FW(7Q1Os) 5.0778
ug/L
0 0
N/A
_ _ _ ------------- ___
--Chronic:
______
----- - -
1.364
Acute: NO WQS
Chlorides
NC
230 FW(7Q10s)
mg/L
0 0
N/A
Chronic: 367.3
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(30Q2)
ug/L
0 0
N/A
_ _ _______ __
--Chronic:
_____ ______-_- - ____
- ---
3.1-
Acute: NO WQS
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
0 0
N/A
_ ___
_--________-_-__ -_-_
Chronic: 924.0
Acute: 2,068.1
Chromium III
NC
175.8397 FW(7Q10s) 1379.8194
µg/L
0 0
N/A
_ _ ____ _ ___
- -Chronic:
______ -_ - _
280.8
Acute: 24.0
Chromium VI
NC
11 FW(7Q10s) 16
µg/L
0 0
N/A
-----------
-----------------
Chronic: 17.6
Chromium, Total
NC
µg/L
0 0
N/A
Page 3 of 5
3.3 88722RPA2019, rpa
10/18/2019

Killian Creek WWTP a Outfall 001
NCO088722 Freshwater RPA- 95%Probability/95%Confidence Usina Metal Translatnrs n,., - -z zr nnI--n
Acute: 25.49
Copper
NC
11.9766 FW(7QIOs) 17.0103
ug/L
3 1
27.00
n < 9
C.V.(de(aull)
n_______ 3__
___h_i1_
RPNote: for Llmited 5ataset(n<8samples)-apply
Limited data set
No value> Allowable Cw
Quarterly Monitoring
Acute: 33.0
Cyanide
NC
5 FW(7QIOs) 22
10
ug/L
0 0
N/A
__Chronic:
Acute: NO WQS
Fluoride
NC
1800 FW(7QIOs)
ug/L
0 n
N/A
Chromic: 2,874.6__
Acute: 201.442
Lcad
NC
5.0932 FW(7QIOs) 134.4025
-ug/L
0
__t,hronic: _8.134
_-_-_________-___-________
Acute: NO WQS
fdercury
NC
12 FW(7QIOs)
0.5
ng/L
0
_
Chronic: I9.2
------------------------
Acute: NO WQS
Molybdenum
NC
2000 }iH(7QIOs)
ug/L
0 0
S :1
_ _
Chronic: ____3,194.0_—
--------------------------
Acute (FW): 776.7
Nickel
NC
56.3472 FW(7QIOs) 518.1877
µg/L
_ _ _ _
0 0
N/A
Chronic (FW)-___90.0 __
___.______________________
Nickel
NC
25.0000 WS(7QIOs)
µg/L
Chronic (WS) 39.9
Acute: 83.9
Selenium
NC
5 FW(7QIOs) 56
ug/L
0 0
N/A
Acute: 1.077
Silver
NC
0.06 FW(7QIOs) 0.7186
ug/L
0 0
N/A
_
Chronic: 0.096
Acute: 291.4
Zinc
NC
191,9252 FW(7QIOs) 194.4535
ug/L
13 14
161.8
Chronic: 306.5
No RP ,Predicted Max z 50 % of Allowable Cw
No value > Allowable Cw
apply Cuerledy Monhodng -
Acute:
a 0
N/A
Acute:
0
N/A
_
—_Chmnic:__________
_____________-_______-____
Acute:
Page 4 of 5 3.3_88722RPA2019. rpa
10/1812019

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
❑CHECK IF HQW OR ORW WQS
Facility Name
Killian Creek WWTP
WWTP/WTP Class
III
NPDES Permit
NC0088722
Outfall
001
Flow, Qw (MGD)
4.900
Receiving Stream
Killian Creek
HUC Number
Stream Class
C
❑Apply WS Hardness WQC
7410s (cfs)
3.10
7010w (cfs)
7.50
3002 (cfs)
10.80
CIA (cfs)
53.00
1 Q10s(cfs)
•- 2.59
Effluent Hardness
50.23 mg/L (Avg)
Upstream Hardness
_ _ _ _ _ _ _ 25 mg/L (Avg)
Combined Hardness Chronic
42.92 mgIL
-----------------------------------
Combined Hardness Acute
_ _ _ _ _ _ _ 43.82 mg/L_
Data Source(s)
❑CHECK TO APPLY MODEL
P.ar01
Par02
Par03
Par04
Par05
Par06E
Par07
Par08
Par09
Par10
Part I
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name wos Type Chronic Modifier Acute PQL Units
Arsenic
Aquacnc Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HHANS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.8876
FW
5.2869
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
11, Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
183.2848
FW
1433.1020
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
12.5061
FW
17.7682
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
5.3888
FW
141.5086
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
58.8133
FW
538.8705
pg/L
Nickel
water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ugh.
Silver
Aquatic Life
NC
0.06
FW
0.7781
ug/L
Zinc
Aquatic Life
NC
200,3381
FW
202.2270
ug/L
4.9_88722RPA2019, input
10/18/2019

Killian Creek WWTP
NCO088722
Freshwater RPA -
Qw (MGD) = 4.9000
1Q IOS (cfs) = 2.59
7QIOS (cfs) = 3.10
7QIOW (cfs) = 7.50
30Q2 (cfs) = 10.80
Avg. Stream Flow, QA (cfs) = 53.00
Receiving Stream: Killian Creek
95% Probability195% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
WWTP/WTP Class: III
IWC% @ 1Q10S = 74.57044674
IWC% @ 7Q IOS = 71.01449275
IWC%@ 7Q1OW = 50.31467373
IWC% @ 30Q2 = 41.28839359
IW%C @ QA = 12.53403746
Stream Class: C
Outfall 001
Qw = 4.9 MGD
COMBINED HARDNESS (me/L)
Acute = 43.82 mg/L
Chronic = 42.92 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
(a
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
°'
�
Chronic Applied Acute
n # Det. Max Pred Cw Allowable Cw
Acute (FW): 455.9
Arsenic
C
150 FW(7Q1Os) 340
ug/L
_ _ _ _ — _ ___
____ ____ ___ _ _
_- —
0 0
N/A
Chronic (FW): 211.2
Arsenic
C
10 HH/WS(Qavg)
ug/L
Chronic (HH)--_-79.8 �—
— —_— — —�— —_--- _ - ——
Acute: 87.17
Beryllium
NC
6.5 FW(7Q10s) 65
ug/L
0 0
N/A___
_________
Chronic: 9.15
Acute: 7.090
Cadmium
NC
0.8876 FW(7Q10s) 5.2869
ug/L
0 0
N/A
— ______
Chronic: 1.250
Acute: NO WQS
Chlorides
NC
230 FW(7Q1Os)
mg/L
0 0
N/A
____ _ ___
________ __ __ __` __
•
Chronic:
_
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(30Q2)
ug/L
0 0
N/A
______.4 __
--Chronic:
_________________ _ ___ _
2
Acute: NO WQS
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
0 0
N/A
— �
Chronic: 726.E
Acute: 1,921.8
Chromium III
NC
183.2848 FW(7QIOs) 1433.1020
µg/L
0 0
N/A
_ _ _
--Chronic:
________ --- _________ __ _
258.1
Acute: 21.5
Chromium VI
NC
11 FW(7Q10s) 16
µg/L
0 0
N/A
__—_____ ____
Chronic: 15.5
Chromium, Total
NC
µg/L
0 0
N/A
4.9 88722RPA2019, rpa
Page 3 of 5 10/18/2019

Killian Creek WWTP z Outfall 001
NCO088722 Freshwater RPA- 95% Probability/95% Confidence Using Metal Translators Qw = 4.9 MGD
Acute: 23.83
Copper
NC
12.5061 FW(7QIOs) 17.7682
ug/L
3 1
27M0
_ _ _ ___
_ _
,ode: n < 9
t'A, Idclaull)
Chronic: 17.61
RP for Limited Dataset (n<8 samples) - apply
Limited datn set
No value > Allowable Cw
Cwrtedy Monitoring
Acute: 29.5
Cyanide
NC
5 FW(7QIOs) 22
10
ug/L
0 0
N/A
Acute: NO WQS
Fluoride
NC
1800 FW(7QIOs)
us/L
0 0
N/A
Acute: 189.765
Lead
NC
5.3888 FW(7QIOs) 141.5086
ug/L
0 0
N/A
---------_—�--
Acute: NO \VQS
Mercury
NC
12 FW(7Q I Os)
0.5
ng/l.
Il 0
N/A
_
—_Chronic:Acute:
NO NO WQS
Molybdenum
NC
2000 HH(7QIOs)
ug(L
0 0
N:A
Acute (FW): 722.6
Nickel
NC
58,8133 FW(7QIOs) 538.8705
µg/L
_ _ --
------------------------
0 0
N/A
Chronic (FW)--�82.8
Nickel
NC
25.0000 WS(7Q10s)
µg/L
Chronic(WS) 35.2
Acute: 75.1
Selenium
NC
5 FW(7QIOs) 56
ug/L
0 0
N/A
_Chronic: _—_—_ 7.0 --
----------
Acute: 1.043
Sliver
NC
0.06 FW(7QIOs) 0.7781
ug/L
0 0
N/A
-------
Acute: 271.2
zinc
NC
200.3381 FW(7QIOs) 202.2270
ug/L
14 14
161.8
Chronic: 282.1 ___
_ ___ _ _ _ __
No RP Pmtlicied Max z 50%of Allowable Cw
No value> Allowable Cw
apply Ouadedy Monitodng
Acute:
0 0
N/A
________
Chronic:
________ _______
Acute:
0 0
N/A
—_Chronic:
Acute:
4.9_88722RPA2019, rya
Page 4 of 5 10/18/2019

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
I
❑CHECK IF HQW OR ORW WQS
Facility Name
Killian Creek WWTP
WWTPIWTP Class
III
NPDES Permit
NC0088722
Outfall
001
Flow, Qw (MGD)
6.600
Receiving Stream
Killian Creek
HUC Number
Stream Class
C
❑Apply WS Hardness WQC
7010s (cfs)
3.10
7Q10w (cfs)
7.50
3002 (cfs)
10.80
QA (cfs)
53.00
1 Q10s(cfs)
- -
• -- 2.59
Effluent Hardness
50.23 mg/L (Avg)
Upstream Hardness
25 mg/L (Avg)
_____�__
------------------------
Combined Hardness Chronic
44.37 m9 /L
----------------------------------
Combined Hardness Acute
_ _
_ _ _ 45.14 m L
Data Source(s)
❑CHECK TO APPLY MODEL
Pare1
Par02
Par03
Par04
Par05
Par061111
Parity
Par08
Par09
P.ar10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Paris
Parts
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name wos Type Chronic A.We, Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HH/WS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.9101
FW
5.4255
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
NCI
300 1
A
I ug/L
Chromium III
Aquatic Life
NC
1 188.3262
FW
1468.3357
ug/L
Chromium VI
Aquatic Life
NCI
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
12.8653
FW
18,2716
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
5.5913
FW
146.2561
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
ng/L
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
60.4851
FW
552.5612
pg/L
Nickel
water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.8188
ug/L
Zinc
Aquatic Life
NC
206.0417
FW
207.3729
uglL
6.6_88722RPA2019, input
10/18/2019

Killian Creek WWTP Z
NCO088722 Freshwater RPA - 95% Probabilityl95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MGD) = 6.6000
WWTP/WTP Class: 111
1Q10S (cfs) = 2.59
IWC% @ 1Q10S = 79.79719189
7Q 1 OS (cis) = 3.10
IWC% @ 7Q IOS = 76.74418605
7Q IOW (cfs) = 7.50
IWC% @ 7Q IOW = 57.69881557
30Q2 (cfs) = 10.80
IWC% @ 30Q2 = 48.64479315
Avg. Stream Flow, QA (cfs) = 53.00
IW%C @ QA = 16.17902894
Receiving Stream: Killian Creek
Stream Class: C
Outfall 001
Qw=6.6MGD
COMBINED HARDNESS (me/L)
Acute = 45.14 mg/L
Chronic = 44.37 mg/L
PARAMETER
NC STANDARDS OR EPA CRITERIA
F
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
a
0
Chronic Stan lrAcute
n # Det. Max Pred Cw Allowable Cw
Acute (FW): 426.1
Arsenic
C
150 FW(7Q10s) 340
ug/L
____________
0 0
N/A
_____
Chronic (FW) 195.5
Arsenic
C
10 HH/WS(Qavg)
ug/L
Chronic (HH)------
61.8
— .--------�-----_— — —_—_-
Acute: 81.46
Beryllium
NC
6.5 FW(7Q l Os) 65
ug/L
0 0
N/A
_ _ _ _ _ _ _ _ _ _
-_ — —
- -
Acute: 6.799
Cadmium
NC
0.9101 FW(7Q IOs) 5.4255
ug/L
0 0
N/A
Acute: NO WQS
Chlorides
NC
230 FW(7Q10s)
mg/L
0 0
N/A
_ _ —
--Chronic:
_—__ -_—___ — _- _
— _--- --- --
299.7
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(30Q2)
ug/L
0 0
N/A
_ _ _ —
--Chronic:
— __ -- _--- _ _: _
— -- --- ----
2.1
Acute: NO WQS
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
0 0
N/A
_ _ _ — _ _ _ _
_
Chronic: 616.7
Acute: 1,840.1
Chromium Ill
NC
188.3262 FW(7Q1Os) 1468.3357
µg/L
0 0
N/A
_ _ _
_— — — ______ __
-
Acute: 20.1
Chromium VI
NC
11 FW(7Q10s) 16
µg/L
0 0
N/A___
____ ____—_ --------------7_
Chronic: 14.3
Chromium, Total
NC
µg/L
0 0
N/A
Page 3 of 5
6.6 88722RPA2019, rpa
10/18/2019

Killian Creek WWTP a Outfall 001
NCO088722 Freshwater RPA- 95% Probability/95% Confidence Using Metal Translators Qw = 6.6 MGD
Acute: 22.90
Copper
NC
12.8653 FW(7QIOs) 18.2716
ug/L
3 1
27.00
___ _______ ___
_ _ _ _ _ _ _ _ _
Note: n59
C.V.(defaull)
Chronic: 16.76
;-;Note:
RPforlWm Dataset(n<8 samples) -apply
Limited data set
No value> Allowable Cw
Quarterly Monitoring
Acute: 27.6
Cyanide
NC
5 FW(7QIOs) 22
10
ug/L
0 0
N/A
_
Acute: NO WQS
Fluoride
NC
1800 FW(7QIOs)
ug/L
0 0
N/A
_
Chronic: _2,345.5_— ------
Acute: 183.285
Lead
NC
5.5913 FW(7QIOs) 146.2561
ug/L
0 0
N/A
Acute: NO WQS
Mercury
NC
12 FW(7QIOs)
0.5
ng/L
0 0
N/A
Acute: NO WQS
Molybdenum
NC
?uuu III-1(7Q10s)
ugfL
0 0
N/A
Acute (FW): 692.5
-
Nickel
NC
60.4851 FW(7QIOs) 552.5612
µg'L
0 0
N/A
Nickel
NC
25.0000 WS(7QIOs)
µg/L
Chronic (WS) 326
Acute: 70.2
Selenium
NC
5 FW(7QIOs) 56
ug/L
0 0
N/A
_
Chronic: 6.5
Acute: 1.026
Silver
NC
0,06 FW(7QIOs) 0.8188
ug/L
0 0
N/A
Acute: 259.9
zinc
NC
206.0417 FW(7QIOs) 207.3729
ug/L
14 14
161.8__
Cluonto: 268.5
No RP, Predicted Max a 50% of Allowable Cw
No value> Allowable Cw
apply Quarterly Monitoring
Acute:
0 o
N/A
•C11romC:
Acute:
0 o
N/A
Acute:
6.6_88722RPA2019, Ma
Page 4 of 5 10/18/2019

REASONABLE POTENTIAL ANALYSIS
M
M151
HIIwb XWn•.
�^M.Mw.e
Gqw
5e
�»l
�r�
Oi
uw
Wv6l .Y
or
BNmS Yr.
YILAy
»
'
x mr»n
m
m5i c..�awm
o
zm�m�ie
r er
r cw.�aryi
x
x
mmM
Sry
.sm �.
;
W.onea
zim y�i
w
r�ma
reap
io
m
n
»
m
m
n
+e
n
a
a
a
a
a
e
47
41
n
m
u
a
y
y
m
y
b
y

NCO088722
NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently
approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft
permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as
approved.
Table 1. NC Dissolved Metals Water Oualitv Standards/Aauatic Life Protection
Parameter
Acute FW, µg/1
(Dissolved)
Chronic FW, µg/l
(Dissolved)
Acute SW, µg/1
(Dissolved)
Chronic SW, µg/l
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life
standards for Mercury and selenium are still expressed as Total Recoverable Metals due to
bioaccumulative concerns (as are all human health standards for all metals). It is still necessary
to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC
2B.0200 (e.g., arsenic at 10 µg/1 for human health protection; cyanide at 5 µg/L and fluoride at
1.8 mg/L for aquatic life protection).
Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/I
Cadmium, Acute
WER*{1.136672-[In hardness](0.041838)) • e^{0.9151 [In hardness]-3.1485)
Cadmium, Acute Trout waters
WER*{1.136672-[In hardness](0.041838)) • e^(0.9151[in hardness]-3.6236)
Cadmium, Chronic
WER*{1.101672-[In hardness](0.041838)) • e^{0.7998[In hardness] -4.4451}
Chromium III, Acute
WER*0.316 - e^(0.8190[ln hardness]+3.7256)
Chromium III, Chronic
WER*0.860 • e^(0.8190[ln hardness]+0.6848)
Copper, Acute
WER*0.960 • e^{0.9422[ln hardness]-1.7001
Copper, Chronic
WER*0.960 - e^ {0.8545 [ln hardness]- 1.702)
Lead, Acute
WER* { 1.46203-[ln hardness] (0.145712)) • e^ (1.273 [In hardness]- 1.460)
Lead, Chronic
WER* { 1.46203-[In hardness](0.145712)) • e^ { 1.273 [In hardness] -4.705)
Nickel, Acute
WER*0.998 • e^{0.8460[ln hardness]+2.255}
Nickel, Chronic
WER*0.997 • e^(0.8460[ln hardness]+0.0584)
Pagel of 4

NCO088722
Silver, Acute
WER*0.85 - e^(1.72[ln hardness]-6.59)
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 • e^(0.8473[ln hardness]+0.884)
Zinc, Chronic
WER*0.986 - e^(0.8473[in hardness]+0.884)
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of
the dissolved and hardness -dependent standards requires additional consideration in order to establish the
numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness
and so must be calculated case -by -case for each discharge.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The
discharge -specific standards must be converted to the equivalent total values for use in the RPA
calculations. We will generally rely on default translator values developed for each metal (more on that
below), but it is also possible to consider case -specific translators developed in accordance with
established methodology.
RPA Permittinit Guidance/WOBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,
based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable
standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If
monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below
detection level), then the Division may remove the monitoring requirement in the reissued permit.
1. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically calculates
the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, cfs) 0.993
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of concern and for
each individual discharge, the Permit Writer must first determine what effluent and instream
(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any
hardness data and contacts the Permittee to see if any additional data is available for instream
hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the
hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively.
If the use of a default hardness value results in a hardness -dependent metal showing reasonable
potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and
upstream hardness samples over a period of one week. The RPA is rerun using the new data.
Page 2 of 4

NCO088722
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic)
_ (Permitted Flow, cfs *Avg. Effluent Hardness, mg j) + (s7Q 10, cfs *Avg. Upstream Hardness, m /gU
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total recoverable
metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any
have been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream
ambient conditions. This factor is calculated using the linear partition coefficients
found in The Metals Translator. Guidance for Calculating a Total Recoverable
Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the
equation:
C is = 1
Ctotal 1 -+- f [Kpo] [ss(l+a)] [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used,
and
Kpo and a = constants that express the equilibrium relationship between dissolved
and adsorbed forms of metals. A list of constants used for each hardness -dependent
metal can also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard for each metal of concern is divided by the default partition coefficient (or
site -specific translator) to obtain a Total Recoverable Metal at ambient conditions.
In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the
dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to
obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is
dissolved to the same extent as it was during EPA's criteria development for metals. For more
information on conversion factors see the June, 1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7Q 10 + Qw) (Cwgs) — (s7Q 10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q 10)
s7Q 10 = summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Flows other than s7Q 10 may be incorporated as applicable:
1 Q 10 = used in the equation to protect aquatic life from acute toxicity
Page 3 of 4

NC0088722
QA = used .in the equation to protect human health through the consumption of water,
fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern.
Data entered must have been taken within four and one-half years prior to the date of the permit
application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper
concentration of each pollutant. The Predicted Max concentrations are compared to the Total
allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds
the acute or chronic Total allowable concentrations, the discharge is considered to show
reasonable potential to violate the water quality standard, and a permit limit (Total allowable
concentration) is included in the permit in accordance with the U.S. EPA Technical Support
Document for Water Quality -Based Toxics Control published in 1991.
7. When appropriate, permit writers develop facility specific compliance schedules in accordance
with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on
40 CFR 122.47 Compliance Schedule Requirements.
8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and
hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data
results may be used as a conservative surrogate in cases where there are no analytical results
based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for
total chromium will be compared against water quality standards for chromium In and
chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are
inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the
accuracy of the permit limits and to build a more robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analvsis for this nermit ;nchicied-
Parameter
Value
Comments (Data Source)
Average Effluent Hardness (mg/L)
50.2
Average from 3 PPA
[Total as, CaCO3 or (Ca+Mg)]
Average Upstream Hardness (mg/L)
25-50
Decisions made using 25-50
[Total as, CaCO3 or (Ca+Mg)]
hardness sans instream values
7Q10 summer (cfs)
3.1
USGS 2017
1 Q 10 (cfs)
2.59
Calculated, DWR regression eq.
Permitted Flow (MGD)
1.68-
6.6
Date: 10/ 18/ 19
Permit Writer: David Hill
Page 4 of 4

ILI rBitI:Z9A' IIr_,*F.ltdItF.fi6TiM
Facility: Killian Creek WWTP
PermitNo. NC0088722
Prepared By: David Hill
Enter Design Flow (MGD): 2.5
Enter s7Q10 (cfs): 3.1
Enter w7Q10 cfs : 7.5
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS)
3.1
s7Q10 (CFS)
3.1
DESIGN FLOW (MGD)
2.5
DESIGN FLOW (MGD)
2.5
DESIGN FLOW (CFS)
3.875
DESIGN FLOW (CFS)
3.875
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
55.56
IWC (%)
55.56
Allowable Conc. (ug/1)
31
Allowable Conc. (mg/1)
1.6
1.5 a i- '
1.3 a 4.9
Ammonia (Winter)
1.7-'6 b•e
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
7.5
Monthly Average Limit:
200/100ml
DESIGN FLOW (MGD)
2.5
(If DF >331; Monitor)
DESIGN FLOW (CFS)
3.875
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
1.80
Upstream Bkgd (mg/1)
0.22
IWC (%)
34.07
Allowable Conc. (mg/1)
4.9
4.1 'a 3.35
3,vaN.9
Total Residual Chlorine
3. D le la. U
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

Whole Effluent Toxicity Testing and Self Monitoring Summary
Kenly WWFP
NCO064891/001
County:
Johnston
Region:
FRO
Basin:
NEU06
Mar Jun Sep Dec
SOC_JOC:
Cerl7dPF
Begin:
8/1/2018
chr lim: 22%
+
NonComp:
Single
7Q10: 3.41
PF: 0.63 IWC:
22 Freq: Q
1
F M
A
M
J
l
A
S
O
N
2015
-
Pas
-
Pass
-
Pass
-
-
2016
-
Pass
-
-
Pa:i
-
Pass
-
-
2017
- Pass
-
-
Pass
-
-
Pass
-
2018
-
- Pass
-
-
Pa.
Pass
-
2019
-
- Pass
-
-
Pass
-
-
-
-
Kenric Road WFP
N00084204/001
County:
Robeson
Region:
FRO
Basin:
WM51
Jan AprJul Oct
SOC_10C:
Cerl7dPF
Begin:
8/1/2014
Chr Cer PF Monit: 90
NonComp;
7010:
PF:
IWC:
Freq: Q
l
F M
A
M
J
J
A
S
O
N
2015
Pass
- -
Pass
-
-
-
-
-
Fail
-
2016
Pass
- -
Fail
-
-
Fall
-
-
Fail
-
2017
Fall
- -
Fail
-
-
Pau
-
-
Fall
-
2018
Fail
- -
Fall
-
-
Fail
-
-
Fall
-
2019
Fail
- -
Fail
-
-
NR
-
-
-
-
Kerr lake Regional WTP
NC0083101/001
County:
Vance
Region:
RRO
Basin:
ROA05
Jan Apr Jul Oct
SOC_JOC:
Cer17dPF
Begin:
6/1/2012
Chr Monit: 90%
NonComp:
7Q10:
PF:
IWC:
Freq: Q
J
F M
A
M
l
J
A
S
O
N
2015
Fall
- -
Fall
-
-
Fall
-
-
Pais
-
2016
Pass
- -
Pass
-
-
Pass
-
-
Pass
-
2017
Pass
- -
Pass
-
-
Pass
-
-
Pa.
-
2018
Pa.
Pais
-
-
Fall
-
-
Pa.
-
2019
Pass
- -
Pass
-
-
Pass
-
-
-
-
Kershaw WTP
NCO088331/001
County:
Pamlico
Region:
WARO
Basin:
NEU10
MarJun Sep Dec
SOC_JOC:
Mysd24PF
Begin:
11/1/2018 AcP/F Monit: 90%M
NonComp:
7Q30: NA
PF:
IWC:
Freq: Q
J
F M
A
M
J
J
A
S
O
N
2015
-
- Pass
-
-
Pass
-
-
Pass
-
-
2016
-
- Pass
-
Fall
-
-
Pass
-
-
2017
-
- Pass
-
Pau
-
-
Pass
-
2018
-
- Pass
-
Pass
-
-
H
Pais
-
2019
-
- Fail
-
-
Pass
-
-
-
-
-
Killian Creek WWrP-Lincoln
NCO088722/001
County:
Lincoln
Region:
MRO
Basin:
CT833
Jan Apr Jul Oct
SOC_IOC:
Ceri7dPF
Begin:
3/1/2015
Chr Lim: 52%@1.68
NonComp:
7Q30: 2.4
PF: 1.68
IWC:
52/68 Freq: Q
J
F M
A
M
l
J
A
S
O
N
2015
Pass -
- Pass -
- Pass -
- Pais
2016
Pass -
- Pass -
- Pas -
- Pas
2017
Pass -
- Pass -
- Pass -
- Pass
2018
Pass -
- Pass -
- Pass -
- Fail
2019
Pa 'loo(P) -
- Pa. 100ffl -
- Pass »00(P) -
- -
Pass
D
vaa,
Pass
Pass
Pass
U7
0
D
Pass
Pass
Pa.
Pass
to
Pass
Legend: P= Fathead minnow (Pimohales oromelas), H=No Flow (facility is active). s =Split test between Certified labs Page 61 Of 124

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test Date:8/23/2019
Facility: Lincoln Co. - KCWWTP
La zz
: Meritech, [no. (Lab #NCO27)
x z,
Slgnpqcf Opersto;,Un Resopsible Charge
x '- /
Sl a re of Laboratory Supervis
NPDES # NCOD 88722
MAIL ORIGINAL TO: Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Pipe#: 001 County: Lincoln I
Test Initiation Date/Time 8/13/2019 3:20 PM Avg Wt/Surv. Control 0.693
% Eff. Repl. 1 2 3 4
Control Surviving #
Original #
Wt/0691nal (mg)
13 Surviving #
Original #
Wt/original (mg)
10
10
10
10
10
10
10
10
0.694
0.652
0.737
0.689
9
10
10
1 10
10
10
10
10
0.586
0.782
0.672
0.630
% Survivall 100.0
Test Organisms
ja Cultured in -House
M Outside Supplier
Avg Wt (mg)l 0.693 Hatch Date: 8/12119
% SurvIvall 97.5 Hatch Time: 3:00 pm CT
Avg Wt (mg) 1 0.668
26 Surviving #
10
10
10
10
% Survival 100.0
Original #
High Concentration
PH (SU) lntt/Ftn
DO (mg/L) [nit/Fin
Temp (C) Init/Fln
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Condudivity (umhos/an)
Chlorlas(mg/L)
Temp. at Racelpt (-C)
10
10
10
10
10
10
10
10
10
10
10
10
10
7.96 / 6.81
7.47 16.88
7.71 r 7.08
7.52 / 7.91
8.08 / 6.45
7.77 / 7.45
7.78 / 8.19
7.72 / 7.97
8.12 / 8.09
7.74 / 8.11
7.86 / 8.35
8.29 18.00
7.84 r 8.13
8.02 17.72
8.09 / 6.10
6.62 / 6.78
7.82 r 8.77
7.42 / 7.82
7.83 1 6.23
7.64 r 7.04
7.60 r 6.57
24.7 / 24.8
25.0 / 25.4
25.2 / 24.9
24.5 r 25.0
24.6 125.0
25.0 / 24.6
24.6 r 24.9
1 2 3
8/12/2019
8/14/2019
8/15/2019
24.1
24.2
24.3
62
62
80
88
126
139
438
479
482
<0.1
<0.1
<0.1
0.7
2.3
2.3
Dilution H2O Batch # 1430 1432 1433
Hardness (mg/L) 82 88 92
Alkalinity (mg/L) 101 56 58
Conductivity (umhoslan) 380 283 288
Survival
Growth
Normal
r. it
Fit
Ham. Var.
rAT
FIV
NOEC
100
100
LOEC
>100
>100
ChV
>100
>100
Method
Steeps
Dunnett's
Overall Result
ChV >100
Stets
Survival
Growth
Cone.
Crit[csl CekulaLed
Critical Calculated
13
10 16
2.41 0.5786
26
10 18
2.41 0.6126
52
10 18
2.41-1.0494
78
10 18 --
2,41 0.5502
100
10 16
2.41 1.1989

MONITORING REPORT(MR) VIOLATIONS for:
Permit: NCO0887T', MRs Between - 2016 and ` - 2019 Region: %
Facility Name: /, Param Name % County: %
Major Minor: %
Report Date: 10/10/19 Page: 1 of 1
Violation Category:Limit Violation Program Category:
Subbasin:% Violation Action: %
PERMIT: NCOOBB722
FACILITY: Lincoln County -Killian Creek WWTP
COUNTY: Lincoln
REGION: Mooresville
Limit Violation
MONITORING
VIOLATION
UNIT OF
CALCULATED
%
REPORT
OUTFALL
LOCATION
PARAMETER
DATE
FREQUENCY
MEASURE
LIMIT
VALUE
Over
VIOLATION TYPE
VIOLATION ACTION
08-2018
001
Effluent
Nitrogen, Ammonia Total (as
08104/18
3 X week
mg/I
5.1
10.3
102.0
Weekly Average
Proceed to
N)- Concentration
Exceeded
Enforcement Case
08 -2018
D01
Effluent
Nitrogen, Ammonia Total (as
O8/31I18
3 X week
mg/I
1.7
2.57
51.3
Monthly Average
Proceed to
N)- Concentration
Exceeded
Enforcement Case
04-2019
001
Effluent
Nitrogen, Ammonia Total (as
04/06/19
3 X week
mg/1
5.1
5.77
13.1
Weekly Average
Proceed to NOV
N) - Concentration
Exceeded
04-2019
001
Effluent
Nitrogen, Ammonia Total (as
04/13/19
3 X week
mg8
5.1
8.42
65.0
Weekly Average
Proceed to NOV
N) - Concentration
Exceeded
04-2019
001
Effluent
Nitrogen, Ammonia Total (as
04/30119
3 X week
mg/I
1.7
3.98
134.4
Monthly Average
Proceed to NOV
N) - Concentration
Exceeded
08-2019
001
Effluent
Nitrogen, Ammonia Total (as
08117/19
3 X week
mg/I
5.1
8.13
59.5
Weekly Average
Proceed to NOV
N) - Concentration
Exceeded
08-2019
001
Effluent
Nitrogen, Ammonia Total (as
OW4119
3 X week
mg/I
5.1
10.6
107.8
Weekly Average
Proceed to NOV
N) - Concentration
Exceeded
08-2019
001
Effluent
Nitrogen, Ammonia Total (as
08/31/19
3 X week
mg/I
1.7
4.88
186.9
Monthly Average
Proceed to NOV
N) - Concentration
Exceeded
09-2019
001
Effluent
Nitrogen, Ammonia Total (as
09/30/19
3 X week
mg/I
1.7
1.75
3.1
Monthly Average
None
N) - Concentration
Exceeded

90 DDICKSON
7929-2019 community infrastructure consultants
October 1, 2019
Mr. David Hill
NPDES Complex Unit
Division of Water Resources
North Carolina Division of Water Quality
Re: Killian Creek WWTP
Request for Additional Information
NPDES Application NCO088722
FUTST MMU
RECEIVED
OCT 04 2019
NCDEQ/DWR/NPDES
Per Lincoln County's letter of October 1, the subject application was place on hold pending receipt
of a FONSI. Lincoln County would now like to request the subject NPDES Permit application be
activated for approval.
The following is a response to your letter of June 27, 2018:
1. Since the original NPDES Permit application of April 25, 2018, Lincoln County has received
approval for a CWSRF loan (Project No. CS370825-02) requiring the submittal of an
Engineering Report/Environmental Information Document (ER/EID) with related SEPA
review and issuance of a FONSI. A 20-year Present Value Cost Analysis (PVCA) was
included within the ER/EID. The ER/EIC has been approved by the NC Division of
Environmental Quality (DEQ) and the FONSI issued and approved.
2. Attached is the requested Supplemental Part D Expanded Effluent Testing Data for the
NPDES Application (Page 10-14) reflecting 3 pollutant scans, corrected pollutant detections
levels where below or equal to the ML/MDL, corrected concentration levels and updated
test methods for the Volatile Organic Compounds, Acid -Extractable Compounds, and Base -
Neutral Compounds.
3. As noted above, the CWSRF requirements included the SEPA review and the FONSI has
been issued and approved by the State Clearinghouse.
616 Colonnade Drive
Charlotte, NC 28205
Tel. [phone]
",xv \v.wkd ickson.com
Aviation • Water Resources • Community Development • Energy

Mr. David Hill
October 3, 2019
Page 2
4. Also attached are the following revised pages of the Application:
a. Page 3 reflecting updated flow data for 2016 to 2018.
b. Page 9 with an updated signature.
Thank you for your corporation on this application. Should you have any further questions or need
additional information, please contact me at 704-651-7982 or email at
[e-mail].
Sincerely,
W.K. Dickson & Co. Inc.
Charles R. Froneberger, PE
Technical Manager
cc: Don Chamblee, Lincoln County
�D IICKSON

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Killian Creek WWTP, NCO088722 I Plant Expansion Catawba
A.5. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes ® No
b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows
through) Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant (i.e., the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 12' month of 'this year' occurring no more than three months prior to this application submittal.
a. Design flow rate 3.35 MOD 16.6 MGD Future mgd
Two Years Ago Last Year This Year
(Jan — Dec 2016) (Jan —Dec 2017) (Jan —Dec 2018)
b. Annual average daily flow rate 0.979 0.942 1.043
C. Maximum daily flow rate1.329 1.621 1.612 2.411
A.7. Collection System. Indicate the type(s) of collection system(s) used by the treatment plant. Check all that apply. Also estimate the percent
comnbution (by miles) of each.
® Separate sanitary sewer 100 %
❑ Combined storm and sanitary sewer %
A.8. Discharges and Other Disposal Methods.
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes (Future) ❑ No
If yes, list how many of each of the following types of discharge points the treatment works uses:
I. Discharges of treated effluent 01
it. Discharges of untreated or partially treated effluent N/A
iii. Combined sewer overflow points NIA
iv. Constructed emergency overflows (prior to the headworks) N/A (Other than sewer system overflow)
V. Other
b. Does the treatment works discharge effluent to basins, ponds, or other surface impoundments
that do not have outlets for discharge to waters of the U.S.? ❑ Yes ® No
If yes, provide the following for each surface impoundment:
Location: NIA RECEIVEu
Annual average daily volume discharge to surface impoundmerd(s) NIA mgd
Is discharge ❑ continuous or ❑ intermitter' Q 4 2019
G. Does the treatment works land -apply treated wastewater? r,1 a 1�t/o I1.Ie ES ❑ Yes ® No
If yes, provide the following for each land application site: 1Y�DC�DVYN IYrDGJ
Location:
Number of acres: NIA
Annual average daily volume applied to site: NIA mgd
Is land application ❑ continuous or ❑ intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another
treatment works? ❑ Yes ® No
PA Form 3510-2A (Rev. 1-99). Replaces EPA fortes 755M & 7550-22. Page 3 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWfP — NCO088722
Plant Expansion Permit
Catawba
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to Instructions to determine who Is an officer for the purposes of this
certification. All applicants must complete all applicable sections of Form 2A, as explained In the Application Overview. Indicate below which
parts of Form 2A you have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed
Form 2A and have completed all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
® Basic Application Information packet Supplemental Application Information packet:
O Part D (Expanded Effluent Testing Data) WA— NEW FACIUTY
O Part E(Toxicily Testing: aiomonitoring Data) WA—NEWFACIUTY
❑ Part F (Industrial User Discharges and RCRWCERCLA Wastes) WA
❑ Part G (Combined Sewer Systems) WA
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel property gather and evaluate the information submitted. Based on my inquiry of the person or personswho
manage the system or those persons directly responsible for gathering the information, the information is, to the best of my kno+Aedge and belief, true,
accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations.
Name and official title Don nCCbamb``lee. Director Pudic Works
'oof
[�
Signature
Telephone number (7041736-8497
Dale signed
Upon request of the permitting authority, you must submit any other information necessary to assure we i �C� ca tires at the treatment
works or identify appropriate permitting requirements. t V LL
UCT 0 4 2019
NCDEQ/DWR/NPDES
SEND COMPLETED FORMS TO:
NCDENR/ DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
PA Form 3510.2A (Rev. 1.99). Replaces EPA forms 7550-6 & 7550.22. Page 9 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
Killian Creek WWfP, NCO088722
Plant Expansion
RIVER BASIN:
Catawba
Permit
SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has (or is
required to have) a pretreatment program, or is otherwise required by the permitting authority to provide the data, then provide effluent testing data for
the following pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each
outfall through which effluent is discharged. Do not include information on combined sewer overflows in this section. All information reported must be
based on data collected through analyses conducted using 40 CFR Part 136 methods. In addition, these data must comply with QA/QC requirements
of 40 CFR Part 136 and other appropriate QA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the
blank rows provided below any data you may have on pollutants not specifically listed in this form. At a minimum, effluent testing data must be based
on at least three pollutant scans and must be no more than four and one-half years old.
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
MUMDL
POLLUTANT
M
Number
Conc.
Units
MSs
Units
Conc.
Units
as
Units
of
s
Samples
METALS (TOTAL RECOVERABLE), CYANIDE, PHENOLS, AND HARDNESS.
ANTIMONY
<25.0
ug//L
g
<25.0
ug//L
9
3
EPA 200.7
5.ug 25
u &fl-
ARSENIC
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 200.7
10.0 ug/L
BERYLLIUM
<1.0
ug//L
9
<5.0
ugl/L
9
3
EPA 200.7
1.0 & 5
0 &
CADMIUM
<1.0
ug//L
g
<2.0
ug//L
g
3
EPA 200.7
1.0
CHROMIUM
<5.0
ug//L
g
<5.0
ug//L
g
3
EPA 200.7
5.0 ug/L
COPPER
9
ugl/L
9
<6.3
ugf/L
g
3
EPA 200.7
5.0 u9/L
LEAD
<5.0
ug//L
9
<10.0
ug/IL
9
3
EPA 200.7
5.0 & ug/L
MERCURY
5.62
ug11L
9
<2.7
ug//L
9
3
EPA 1631 E
0.50 ug/L
NICKEL
5.1
ug//L
g
<6.7
ugHL
g
3
EPA 200.7
5.0 ug/L&
10.0 ug/L
SELENIUM
10.0
ug//L
9
<10.0
ug//L
9
3
EPA200.7
10.0 ug/L
SILVER
<5.0
ugHL
g
<5.0
ug//L
9
3
EPA 200.7
5.0 ug/L
THALLIUM
<20.0
ug//L
g
<20.0
ug//L
g
3
EPA 200.7
10.0&
20.0 ug/L
ZINC
119
ug//L
9
81.4
ug//L
g
3
EPA 200.7
10.0 ug1L
CYANIDE
<0.008
mg//L
g
<0.008
ug//L
9
3
EPA 335.4
SM 4500-CN-E
0.005 &
0.008
ug/L
TOTAL PHENOLIC
0.015
mg/AL
9
<0.012
mg/L
g
3
EPA 420.4
0.01 mg/L
COMPOUNDS
HARDNESS (as CaCO3)
60.9
mg//L
kg
50.5
mg/L
kg
3
EPA 200.7
SM 2340B
1.0 mg/L
Use this space (or a separate sheet) to provide information on other metals requested by the permk wdter
PA Forth 3510-2A (Rev. 1-99). Replaces EPA forms 7550-e & 7550-22. Page 10 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, NCO088722
Plant Expansion Permit
Catawba
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
ML/MDL
Number
Conc.
Units
Mass
Units
Conc.
Units
MassFU7nitsof
METHOD
amples
VOLATILE ORGANIC COMPOUNDS
<5.0 &
ACROLEIN
<50.0
ug/L
g
<50.0
ug/L
g
3
EPA 624.1
<50.0
uglL
ACRYLONITRILE
<10.0
ug/L
9
<50.0
ug/L
9
3
EPA 624.1
10.0&50
ug/L
BENZENE
<2.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 & 2.0
ug/L
BROMOFORM
<1.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 & 2.0
ug/L
CARBON
<2.0
ug/L
9
<2.0
ug/L
9
3
EPA 624.1
1.0 ug/L
TETRACHLORIDE
CHLOROBENZENE
<2.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 g/ 2.0
ug/L
CHLORODIBROMO-
<2 0
ug/L
g
<2.0
ug/L
g
3
EPA 624.1
1.0 ug/l.
METHANE
CHLOROETHANE
<5.0
ug/L
g
<5.0
ug(L
g
3
EPA 624.1
2.0 & 5.0
ug/L
2-CHLOROETHYLVINYL
<5.0
ug/L
9
<5.0
ug/L
9
3
EPA 624.1
5.0 ug/L
ETHER
1.0&2.0
CHLOROFORM
<2.0
ug/L
g
<2.0
uglL
g
3
EPA 624.1
ug/L
DICHLOROBROMO-
<2.0
uglL
g
<2.0
ug/L
g
3
EPA 624.1
1.0 & 2.0
METHANE
ug/L
1,1-DICHLOROETHANE
c2.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 & 2.0
ug2
1,2-DICHLOROETHANE
<2.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 & 2.0
ug/L
TRANS-I,2-DICHLORO-
<20
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 2.0
ug/L
ETHYLENE
LORD-
<2.0
ug/L
g
<2.0
ug/L
g
3
EPA 624.1
1.0 & 2.0
ug2
ETHYLENE
ETHYLENE
2
1.0 & 2.0
1,2-DICHLOROPROPANE
c2.0
UgIL
g
<2.0
uglL
9
3
EPA 624.1
U&
1,3-DICHLORO-
<1.0
ug/L
g
<2.0
uglL
g
3
EPA 624.1
1.0 & 2.0
ugIL
PROPYLENE
ETHYLBENZENE
<2.0
ug/L
g
<2.0
ug/L
9
3
EPA 624.1
1.0 & 2.0
ug/L
METHYL BROMIDE
<5.0
ug/L
9
<5.0
ug/L
9
3
EPA 624.1
1.0, 2.0 &
5.0 ug/L
METHYL CHLORIDE
<5.0
U9IL
g
<5.0
ug/L
g
3
EPA 624.1
2.0 & 5.0
ug/L
METHYLENE CHLORIDE
c2.0
uglL
g
<2.0
ug/L
g
3
EPA 624.1
1.0 g 2.0
Ug2
1.0 & 2.0
1,1,2,2-TETRA-
CHLOROETHANE
<2.0
ug/L
9
<2.0
ug/L
9
3
EPA 6241
ug2
PA Farm 3510-2A (Rev. 1-99). Replaces EPA farms 7550-6 & 7550-22. Page 11 of 24

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:
Catawba
Outfall number. 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
MUMDL
POLLUTANT
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
TETRACHLORO-
ETHYLENE
<2.0
ug/L
g
<2.0
ug/L
g
3
EPA 624.1
1.0 & 2.0
ug/L
TOLUENE
<2.0
ug/L
g
<2.0
ug/L
g
3
EPA 624.1
1.0uglL 2.0
TRICHLOROETHYLENE
<5.0
ug//L
g
<5.0
ug//L
g
3
EPA 624.1
5.0 ug/L
VINYL CHLORIDE
<5.0
ug//L
9
<5.0
ug//L
9
3
EPA 624.1
2.0 gl 5.0
uglL
Use this space (or a separate sheet) to provide information on other volatile organic compounds requested by the permit writer
ACID -EXTRACTABLE COMPOUNDS
P-CHLOR0.M-CRESOL
<10.0
ugllL
9
<10.0
ugl/L
g
3
EPA 624.1
5.0 & 10.0
ug/L
2-CHLOROPHENOL
<10.0
ug//L
9
<10.0
ug//L
g
3
EPA 624.1
5.0 & 10.0
ug/L
Z4-DICHLOROPHENOL
<10.0
ug//L
9
<10.0
ug//L
g
3
EPA 624.1
5.0 & 10.0
UgIL
2,4-DIMETHYLPHENOL
<10.0
ug//L
9
<10.0
ug//L
g
3
EPA 624.1
10.0 ug/L
4,6-DINITRO-O-CRESOL
<50.0
ug//L
g
<50.0
ugl/L
g
3
EPA 624.1
20.0 &
50.0 ug(L
2,4-DINITROPHENOL
<50.0
ug//L
g
<50.0
ug//L
g
3
EPA 624.1
50.0 ug/L
2-14ITROPHENOL
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 624.1
5.0 & 10.0
ug/L
4-NITROPHENOL
<50.0
ug//L
g
<50.0
ug//L
g
3
EPA 624.1
50.0 ug/L
PENTACHLOROPHENOL
<50.0
ug//L
9
<50.0
ug//L
9
3
EPA 624.1
10.0 &
50.0 ug/L
PHENOL
<10.0
ug//L
g
<10.0
ug//L
9
3
EPA 624.1
5.0
ug/L
2,4,6-
TRICHLOROPHENOL
<10.0
ug//L
9
<10.0
uglR
g
3
EPA 624.1
10.0 ug/L
Use this space (or a separate sheet) to provide information on other acid -extractable compounds requested by the permit writer
BASE -NEUTRAL COMPOUNDS
ACENAPHTHENE
<10.0
ugllL
g
<10.0
ug//L
9
3
EPA 625.1
5.0 8 10.0
ug/L
ACENAPHTHYLENE
<10.0
ug//L
g
<10.0
ug//L
9
3
EPA 625.1
5.0 & 10.0
ug/L
ANTHRACENE
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 625.1
5.0 a 10.0
ug/L
BENZIDINE
<50.0
ug//L
9
<50.0
ug//L
g
3
EPA 625.1
50.0 ug/L
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 12 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek VWVTP, NCO088722
Plant Expansion Permit
Catawba
Outfall number. 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
Number
ANALYTICAL
MUMDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
BENZO(A)ANTHRACENE
<10.0
ug//L
9
<10.0
ug//L
g
3
EPA 625.1
5"8"0.0
ug/L
BENZO(A)PYRENE
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 625.1
10.0 ug/L
3.4 BENZO-
FLUORANTHENE
<10.0
ug//L
9
<10.0
ugl/L
9
3
EPA 625.1
5.0 & 10.0
ug/L
5.0 & 10.0
BENZO(GHI)PERYLENE
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 625.1
ug/L
BENZOA
FLUORANTHENE
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 625.1
10.0 ug/L
BIS (2-CHLOROETHOXY)
<10.0
ug//L
9
<10.0
ug//L
9
3
EPA 625.1
5.0 & 10.0
ug/L
METHANE
BIS (2-CHLOROETHYL}
<10.0
ug//L
9
<8.3
ug//L
9
3
EPA 625.1
5.0 & 10.0
ug/L
ETHER
5.0 & 10.0
BIS (2-CHLOROISO-
<10.0
ug//L
9
<8.3
ugl/L
g
3
EPA 625.1
ug/L
PROPYL)ETHER
5.0 & 10.0
BIS (2-ETHYLHEXYL)
<10.0
ug//L
9
<8,3
ug//L
9
3
EPA 625.1
ug/L
PHTHALATE
5.0 & 10.0
4-BROMOPHENYL
<10.0
ug//L
9
<8.3
ugl/L
g
3
EPA 625.1
ug(L
PHENYLETHER
5.0 & 10.0
BUTYL BENZYL
<10.0
ugl/L
9
<8,3
ug//L
9
3
EPA 625.1
ug/L
PHTHALATE
5.0 & 10.0
2-CHLOR0-
<10.0
ug//L
9
<8.3
ug//L
g
3
EPA 625.1
ug/L
NAPHTHALENE
5.0 & 10.0
4-CHLORPHENYL
<10.0
ug//L
9
<8.3
ug/IL
g
3
EPA 625.1
ug/L
PHENYLETHER
5.0 & 10.0
CHRYSENE
<10.0
ug//L
9
<8,3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
DI-N-BUTYL PHTHALATE
<10.0
ug//L
9
<8.3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
DI-N-OCTYL PHTHALATE
<10.0
ug//L
9
<8.3
ugl/L
9
3
EPA 625.1
ug/L
5.0 & 10.0
DIBENZO(A,H)
<10.0
ugl/L
9
<8.3
ug//L
9
3
EPA 625.1
ug/L
ANTHRACENE
5.0
1,2-DICHLOROBENZENE
< 10.0
ugl/L
9
<8.3
ug//L
9
3
EPA625.1
g.0
5.0 & 10.0
1,3-DICHLOROBENZENE
<10.0
ug//L
9
<8.3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
1,4-DICHLOROBENZENE
<10.0
ug//L
9
<8.3
ug/A.
9
3
EPA 625.1
ug/L
3,3-DICHLORO-
<50.0
ug//L
g
9
<41.7
ug//L
9
3
EPA 625.1
25.0&
50.0 ug/L
BENZIDINE
5.0 & 10.0
DIETHYL PHTHALATE
<10.0
ug//L
9
<8.3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
DIMETHYL PHTHALATE
<10.0
ug//L
9
<8,3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
2,4-DINITROTOLUENE
<10.0
ug//L
9
<8,3
ug//L
9
3
EPA 625.1
ug/L
5.0 & 10.0
2,6-0INITROTOLUENE
<100
ug//L
9
<8.3
ug//L
g
3
EPA 625.1
ug/L
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 13 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, NCO088722
Plant Expansion Permit
Catawba
Outfall number. 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
MLIMDL
Number
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
1,2-DINYL-
<10.0
ug//L
g
<10.0
ug//L
9
3
EPA 625.1
5.0 & 10.0
ug/L
HYDRAZINE AZI
FLUORANTHENE
10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
5.0&10.0
ug/L
5.0 & 10.0
FLUORENE
10.0
ug//L
g
<10.0
ugHL
g
3
EPA 8270
ug/L
5 0
HEXACHLOROBENZENE
10.0
ug//L
9
<10.0
ugl/L
g
3
EPA 8270
ug/L
HEXACHLORO-
10.0
ug//L
g
<10.0
ugl/L
g
2
EPA 8270
5.0 & 10.0
ug/L
BUTADIENE
HEXACHLOROCYCLO-
<50.0
ugllL
g
<10.0
ugf/L
g
3
EPA 8270
10.0&
PENTADIENE
50.0 ug/L
HEXACHLOROETHANE
<10.0
ugf/L
g
<10.0
ugl/L
g
3
EPA 8270
10.0 ug/L
INDENO(1,2,3-CD)
<10
U911L
g
<10.0
ugl/L
g
3
EPA 8270
5.0&10.0
PYRENE
ug/L
ISOPHORONE
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
10.0 ug/L
NAPHTHALENE
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
5.0 & 10.0
ug/L
5.0 & 10.0
NITROBENZENE
<10.0
ug//L
g
<10.0
ugf/L
g
3
EPA 8270
ug/L
5.0 & 10.0
N-NITROSODI-N-
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
ugfL
PROPYLAMINE
5.0 & 10.0
N-NITROSODI-
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
uglL
MITROSMINE
N-NITROSODI-
<10.0
ug//L
g
<10.0
ug//L
g
3
EPA 8270
10.0 ugfL
PHENYLAMINE
5.0 & 10.0
PHENANTHRENE
<10.0
ug//L
g
<10.0
U911L
g
3
EPA 8270
ug/L
5.0 & 10.0
PYRENE
<10.0
ug//L
9
<10.0
ug//L
g
3
EPA 8270
ug/L
5.0 & 10.0
1,2.4-
<10.0
ug//L
g
<10.0
ugl/L
g
3
EPA 8270
ug/L
TRICHLOROBENZENE
Use this space (or a separate sheet) to provide information on other base -neutral compounds requested by the permit wi ter
Use this space (or a separate sheet) to provide information on other pollutants (e.g., pesticides) requested by the permit writer
END OF PART D.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550.6 & 7550-22, Page 14 of 24

`�a� COUNTY OF LINCOLN, NORTH CAROLINA
11 5 WEST MAIN STREET, 2,ND FLOOR CITIZENS CENTER, LINCOLNTON, NORTH CAROLINA 28092
20R� CA0.�y�C
DEPARTMENT OF PUBLIC WORKS
PHONE [phone]
FAX [phone]
April 25, 2018
Ms. Julie Grzyb, Supervisor
NC Department of Environment and Natural Resources
Division of Water Resources
NPDES Complex Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Proposed Killian Creek W WTP Expansion
NPDES Permit No. NCO088722
Lincoln County, NC
Dear Ms. Grzyb:
RECElVEDIDENRIDWR
MAY 10 2018
Water Resources
Permitting Section
Lincoln County proposes to increase the capacity of the subject Killian Creek W WTP from the current permitted
design capacity 3.3 mgd to a new design capacity of 6.6 mgd to meet the growth needs within the eastern area of
Lincoln County. Attached are the following items:
• Three (3) copies of the related Engineering Alternative Analysis (EAA)
• Application fee of $1030
• NPDES Form 2A Application for Plant Expansion including:
o Topographic and aerial maps
o Process Flow diagrams
o Process narratives
We have requested and received speculative NPDES Permit limitations from the NPDES Complex Permitting Unit
dated July 26, 2017 for this proposed expansion and have included a copy of this letter within Appendix C of the
EAA. We would like to request the new permit be tiered for an effluent flow of 4.95 mgd and 6.6 mgd.
Should you need any additional information, please contact our engineer, Charles R. Froneberger, P.E. with WK
Dickson & Co., Inc. at email bfroneber er wkdickson.com or me at email [e-mail].
Sincerely,
Donald V. Chamblee, P.E.
Public Works Director
Lincoln County

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
FORM
2A RPTYE
2A APPL
APPLICATION OVERVIEW
PERMIT ACTION REQUESTED:
Plant Expansion Permit
OVERVIEW
RIVER BASIN:
Catawba
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet
and a "Supplemental Application Information" packet. The Basic Application Information packet is divided
into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than or
equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental
Application Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPLICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A.1 through A.8. A treatment works
that discharges effluent to surfacewaters of the United States must also answer questions A.9 through A.12.
B. Additional Application Information for Applicants with a Design Flow 2 0.1 mgd. All treatment works that have design Flows
greater than or equal to 0.1 million gallons per day must complete questions BA through B.6.
C. Certification. All applicants must complete Part C (Certification).
SUPPLEMENTAL APPLICATION INFORMATION:
D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets
one or more of the following criteria must complete Part D (Expanded Effluent Testing Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to provide the information.
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E (Toxicity Testing
Data):
1. Has a design flow rate greater than or equal to 1 mgd,
2. Is required to have a pretreatment program (or has one in place), or
3. Is otherwise required by the permitting authority to submit results of toxicity testing.
F. Industrial User Discharges and RCRA/CERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users (SIUs) or receives RCRA or CERCLA wastes must complete Part F (Industrial User Discharges
and RCRA/CERCLA Wastes). SIUs are defined as:
1. All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations (CFR) 403.6 and
40 CFR Chapter I, Subchapter N (see instructions); and
2. Any other industrial user that:
a. Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works (with certain
exclusions); or
b. Contributes a process wastestream that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant; or
C. Is designated as an SIU by the control authority.
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer
Systems).
ALL APPLICANTS MUST COMPLETE PART C (CERTIFICATION)
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7560-22. Page 1 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WVVfP , NCO088722
Plant Expansion Permit
Catawba
BASIC APPLICATION INFORMATION
PART A. BASIC APPLICATION INFORMATION FOR ALL APPLICANTS:
All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet
A.1. Facility Information.
Facility Name Killian Creek WWTP
Mailing Address 7085 Old Plank Road
Stanley, NC 28164
Contact Person James Timothy Simmons
Title ORC—WWTP Superintendent
Telephone Number [phone]
Facility Address 7085 Old Plank Road
(not P.O. Box) Stanley NC 28164
A.2. Applicant Information. If the applicant is different from the above, provide the following:
Applicant Name Lincoln CountyNC
Mailing Address 115 West Main Street
Lincolnton NC 28092
Contact Person Mr. Don Chamblee
Title Public Works Director
Telephone Number [phone]
Is the applicant the owner or operator (or both) of the treatment works?
® owner ® operator
Indicate whether correspondence regarding this permit should be directed to the facility or the applicant.
❑ facility ® applicant
A.3. Existing Environmental Permits. Provide the permit number of any existing environmental permits that have been issued to the treatment works
(include state -issued permits).
NPDES NCO088722 PSD
UIC Other Stormwater NCG 110000
RCRA Other Certificate of Coverage NCG 110153
A.4. Collection System Information. Provide information on municipalities and areas served by the facility. Provide the name and population of each
entity and, if known, provide information on the type of collection system (combined vs. separate) and its ownership (municipal, private, etc.).
Name Population Served Type of Collection System Ownership
East Lincoln County 16,509 Separate Lincoln County
Total population served 16,509 See Additional Information Page 22
PA Form 3510-2A (Rev. 1-99). Replaces EPA farms 7550-6 & 7550-22. Page 2 of 24

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Killian Creek WWTP, NCO088722 Plant Expansion Catawba
A.S. Indian Country.
a. Is the treatment works located in Indian Country?
❑ Yes ® No
b. Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows
through) Indian Country?
❑ Yes ® No
A.6. Flow. Indicate the design flow rate of the treatment plant (i.e., the wastewater flow rate that the plant was built to handle). Also provide the
average daily flow rate and maximum daily flow rate for each of the last three years. Each year's data must be based on a 12-month time period
with the 1V month of "this year" occurring no more than three months prior to this application submittal.
a. Design flow rate 3.36 MGD 16.6 MGD Future mgd
Two Years Aao Last Year This Year
(Jan — Dec 2015) (Jan —Dec 2016) (Jan —Dec 2017)
b. Annual average daily flow rate 1.004 0.979 0.942
C. Maximum daily flow rate 1.661 1.329 1.621
A.7. Collection System. Indicate the type(s) of collection system(s) used by the treatment plant. Check all that apply. Also estimate the percent
contribution (by miles) of each.
® Separate sanitary sewer 100 %
❑ Combined storm and sanitary sewer %
A.B. Discharges and Other Disposal Methods.
a. Does the treatment works discharge effluent to waters of the U.S.? ® Yes (Future) ❑ No
If yes, list how many of each of the following types of discharge points the treatment works uses:
1. Discharges of treated effluent
ii. Discharges of untreated or partially treated effluent
iii. Combined sewer overflow points
iv. Constructed emergency overflows (prior to the headworks)
V. Other
It. Does the treatment works discharge effluent to basins, ponds, or other surface impoundments
that do not have outlets for discharge to waters of the U.S.? ❑ Yes
If yes, provide the following for each surface impoundment:
Location:
Annual average daily volume discharge to surface impoundment(s)
Is discharge ❑ continuous or ❑ intemrittent?
G. Does the treatment works land -apply treated wastewater?
If yes, provide the following for each land application site:
Location:
Number of acres:
NIA (Other than sewer system overflowl
❑ Yes
Annual average daily volume applied to site: NIA mgd
Is land application ❑ continuous or ❑ intermittent?
d. Does the treatment works discharge or transport treated or untreated wastewater to another ❑ Yes
treatment works?
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
---..c�cnpnoirm-memoa (mcluamg location —and f site(s) if applicable):
Annual daily volume disposed by this method:
Is disposal through this method ❑ continuous or 0 intermittent?
mgd
® No
M
oy -

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek VVWTP, NCO088722
Plant Expansion
Catawba
If yes, describe the mean(s) by which the wastewater from the treatment works is discharged or transported to the other treatment works
(e.g., lank truck, pipe).
N/A
If transport is by a party other than the applicant, provide:
Transporter Name
Mailing Address
Contact Person
Title
Telephone Number ( )
For each treatment works that receives this dischame, provide the following:
Name
Mailing Address
Contact Person
Title
Telephone Number ( )
If known, provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility.
mgd
e. Does the treatment works discharge or dispose of its wastewater in a manner not included
in A.S. through A.8.d above (e.g., underground percolation, well Injection): ❑ Yes
® No
If yes, provide the following for each disposal method:
Description of method (including location and size of site(s) if applicable):
N/A
Annual daily volume disposed by this method:
Is disposal through this method ❑ continuous or ❑ intermittent?
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 4 of 24

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Killian Creek WWTP, NCO088722 Plant Expansion Permit Catawba
WASTEWATER DISCHARGES:
If you answered "Yes" to question A.8.a, complete questions A.9 through A.12 once for each outfall (including bypass points) through
which effluent is discharged. Do not Include information on combined sewer overflows in this section. If you answered "No" to question
AA✓ go to Part "Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall.
a. Outfall number 001
b. Location WA
(City or town, if applicable)
(Zip Code)
(County)
(State)
35°-25'-24.8'N
81°-01'-49.6"W
(Latitude)
(Longitude)
C. Distance from shore (if applicable)
N/A ft.
d. Depth below surface (if applicable)
N/A - Surface ft.
e. Average daily flow rate
(Current Permit = 3.35). Future Permit Request 6.6 mgd
f. Does this outiall have either an intermittent or a periodic discharge?
❑ Yes ® No (go to A.9.g.)
If yes, provide the following information:
Number f times per year discharge occurs:
Average duration of each discharge:
Average flow per discharge:
mgd
Months in which discharge occurs:
g. Is outfall equipped with a diffuser?
❑ Yes ® No
A.10. Description of Receiving Waters.
a. Name of receiving water Killian Creek
b. Name of watershed (if known) Killian Creek / Dutchman Creek/Catawba
United States Soil Conservation Service 14-digit watershed code (if known): Unknown
C. Name of Stale Management/River Basin (if known): Catawba
United States Geological Survey 8-digit hydrologic cataloging unit code (if known): Unknown
d. Critical low flow of receiving stream (if applicable)
acute Unknown- cis chronic Unknown cis
e. Total hardness of receiving stream at critical low flow (if applicable): Unknown mg/I of CaCO3
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 6 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, , NCO088722
Plant Expansion
Catawba
A.11. Description of Treatment (See Description of Treatment Unit —Additional Information, page 22.)
a, What level of treatment are provided? Check all that apply.
❑ Primary ❑ Secondary
® Advanced ❑ Other. Describe: Tertiary Filtration using Disk Filter System
b. Indicate the following removal rates (as applicable):
Design BOD5 removal or Design CBOD5 removal 89 (BOD5) %
Design SS removal 89 %
Design P removal N/A A this time %
Design N removal N/A A this time %
Other %
C. What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe:
Ultraviolet Disinfection
If disinfection is by chlorination is dechlorination used for this outfall? ❑ Yes ® No
Does the treatment plant have post aeration? ® Yes ❑ No
A.12. Effluent Testing Information. All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters. Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharged. Do not include information on combined sewer overflows in this section. All Information reported must be based on data
collected through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QAIQC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a
minimum, effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outiall number:
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
PARAMETER
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.7
S.U.
pH (Ma)dmum)
7.4
SM.
Flow Rate
1.612
MGD
0.954
MGD
365(daily x 12 Mo
Temperature (Winter)
18.5
°C
13.5
°C
92(daily x 4 Mo
Temperature (Summer)
27
°C
24.5
°C
92(daily x 4 Mo
' For old please report a minimum and a maximum dai1v value
MAXIMUM DAILY
AVERAGE DAILY DISCHARGE
POLLUTANT
DISCHARGE
ANALYTICAL
MLIMDL
Numberof
METHOD
Conc.
Units
Cone.
Units
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL OXYGEN
BOD5
17.6
m /L
5.4
m /L
156
SM5210B
2.0m /L
DEMAND (Report one)
CBOD5
FECAL COLIFORM
950
#/100 mL
77
#//L 0
156
SM9222D
1 # / 100 mL
TOTAL SUSPENDED SOLIDS (TSS)
7
m /L
3
m /L
156
SM2540D
2.5 m /L
END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 6 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, NCO088722
Plant Expansion Permit
Catawba
BASIC APPLICATION INFORMATION
PART B. ADDITIONAL APPLICATION INFORMATION FOR APPLICANTS WITH A DESIGN FLOW GREATER THAN OR
EQUAL TO 0.1 MGD (100,000 gallons per day).
All applicants with a design flow rate 2 0.1 mgd must answer questions B.1 through B.6. All others go to Part C (Certification).
B.1. Inflow and Infiltration. Estimate the average number of gallons per day that flow Into the treatment works from inflow and/or infiltration.
Inflow is estimated (a) 21 pod/capita and infiltration estimated 228 gpdfim. See Additional Information on page 22 /23.
Briefly explain any steps underway or planned to minimize inflow and infiltration.
Lincoln County has an ongoing Drogram to routinely clean and inspect both visually and by TV, the gravity collection
system. The low pressure sewer mains operate under pressure, so 1/1 is not an issue.
B.2. Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries. This
map must show the outline of the facility and the following information. (You may submit more than one map if one map does not show the entire
area.) See attached map.
a. The area surrounding the treatment plant, including all unit processes.
b. The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which
treated wastewater is discharged from the treatment plant. Include auffalls from bypass piping, If applicable.
c. Each well where wastewater from the treatment plant is injected underground.
d. Wells, springs, other surface water bodies, and drinking water wells that are: 1) within %mile of the property boundaries of the treatment
works, and 2) listed in public record or otherwise known to the applicant.
e. Any areas where the sewage sludge produced by the treatment works is stored, treated, or disposed.
I. If the treatment works receives waste that is classed as hazardous under the Resource Conservation and Recovery Act (RCRA) by truck, rail,
or special pipe, show on the map where the hazardous waste enters the treatment works and where it is treated, stored, and/or disposed.
B.3. Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant, including all bypass piping and all
backup power sources or redundancy in the system. Also provide a water balance showing all treatment units, including disinfection (e.g.,
chlorination and dechlorination). The water balance must show daily average flow rates at influent and discharge points and approximate daily flow
rates between treatment units. Include a brief narrative description of the diagram.
B.4. Operation/Maintenance Performed by Contractor(s).
Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works the responsibility of a
contractor? ❑ Yes ® No
If yes, list the name, address, telephone number, and status of each contractor and describe the contractor's responsibilities (attach additional
pages if necessary).
Name: N/A
Mailing Address:
Telephone Number. ( )
Responsibilities of Contractor:
B.5. Scheduled Improvements and Schedules of Implementation. Provide information on any uncompleted Implementation schedule or
uncompleted plans for Improvements that will affect the wastewater treatment, effluent quality, or design capacity of the treatment works. If the
treatment works has several different implementation schedules or is planning several improvements, submit separate responses to question B.5
for each. (If none, go to question B.6.)
a. List the outfall number (assigned in question A.9) for each outfall that is covered by this implementation schedule.
001 - Planned addition of eauipment necessary to increase capacity to 6.6 mad by 2021. See Additional Information
Page 22.
b. Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies.
❑ Yes ® No New facility is designed to meet area growth demands.
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 755" & 7550-22. Page 7 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, N/A— New Facility
Plant Expansion Permit
Catawba
C. If the answer to B.5.b is "Yes," briefly describe, including new maximum daily inflow rate (if applicable).
d. Provide dates imposed by any compliance schedule or any actual dales of completion for the implementation steps listed below, as
applicable. For improvements planned independently of local, State, or Federal agencies, indicate planned or actual completion dates, as
applicable. Indicate dates as accurately as possible.
Schedule Actual Completion
Implementation Stage MM/DD/YYYY MM/DD/YYYY
- Begin Construction 06/01/2019
- End Construction 12/31/2020
- Begin Discharge Continued discharge - increased rapacity
- Attain Operational Level 1/1/2021 / /
e. Have appropriate permits/clearances concerning other Federal/State requirements been obtained? ❑ Yes ® No
Describe briefly: See Additional Information, page 22. Design for expanded facility Is currently in progress to include related permitting. ,
B.6. EFFLUENT TESTING DATA (GREATER THAN 0.1 MGD ONLY).
Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the Indicated
effluent testing required by the permitting authority for each ouffall throunh which effluent is discharged. Do not include information
on combine sewer overflows in this section. All Information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition, this data must comply with QAfQC requirements of 40 CFR Part 136 and other appropriate
QAIQC requirements for standard methods for analytes not addressed by 40 CFR Part 136. At a minimum effluent testing data must be
based on at least three pollutant scans and must be no more than four and on -half years old.
Ouffall Number 001
MAXIMUM DAILY
AVERAGE DAILY DISCHARGE
DISCHARGE
ANALYTICAL
POLLUTANT
METHOD
MLIMDL
Conc.
Units
Cone.
Units
Numberof
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA (as N)
6.1
mg/L
0.7
mg/L
156
EPA 350.1
0.1 mg/L
CHLORINE (TOTAL
NIA (UV)
NIA (UV)
RESIDUAL, TRC)
DISSOLVED OXYGEN
10.7
mglL
8.8
mglL
169
SM 4500-OG
0.1 mg/L
TOTAL KJELDAHL
1.3
mglL
1.04
mg/L
3
EPA 361.2
0.60 mg/L
NITROGEN (TKN)
NITRATE PLUS NITRITE
15
mglL
6.13
mg/L
3
EPA 353.2
0.10 mg/L
NITROGEN
OIL and GREASE
ND
mg/L
ND
mg/L
3
EPA 1664A
6 mg/L
PHOSPHORUS (Total)
6.5
mg/L
3.1
mglL
12
EPA 366.1
0.050
TOTAL DISSOLVED SOLIDS
312
mg lL
286.3
mg/L
3
SM 2450C
25.0 mg/L
(TDS)
OTHER
END OF PART B.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 8 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP — NCO088722
Plant Expansion Permit
Catawba
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to Instructions to determine who is an officer for the purposes of this
certification. All applicants must complete all applicable sections of Form 2A, as explained in the Application Overview. Indicate below which
parts of Form 2A you have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed
Form 2A and have completed all sections that apply to the facility for which this application is submitted.
Indicate which parts of Form 2A you have completed and are submitting:
® Basic Application Information packet Supplemental Application Information packet:
❑ Part D (Expanded Effluent Testing Data) N/A— NEW FACILITY
❑ Part E (Toxicity Testing: Biomonitodng Data) N/A— NEW FACILITY
❑ Part F (Industrial User Discharges and RCRA/CERCLA Wastes) WA
❑ Part G (Combined Sewer Systems) N/A
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision In accordance with a system
designed to assure that qualified personnel properly gather and evaluate the Information submitted. Based on my Inquiry of the person or persons who
manage the system or those persons directly responsible for gathering the information, the information is, to the best of my knowledge and belief, true,
accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations.
Name and official title n Chamblee, Chamblee Dire four of Public
^Works
Signature ' 'N - Y S
Telephone number 7 36-8497
Date signed ) �7 -2J r�
Upon request of the permitting authority, you must submit any other information necessary to assure wastewater treatment practices at the treatment
works or identify appropriate permitting requirements.
SEND COMPLETED FORMS TO:
NCDENR/ DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
PA Form 3510-2A (Rev. 1.99). Replaces EPA forms 7550-6 8 7550-22. Page 9 of 24

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WVVfP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART D. EXPANDED EFFLUENT TESTING DATA
Refer to the directions on the cover page to determine whether this section applies to the treatment works.
Effluent Testing: 1.0 mgd and Pretreatment Works. If the treatment works has a design flow greater than or equal to 1.0 mgd or it has (or is required
to have) a pretreatment program, or is otherwise required by the permitting authority to provide the data, then provide effluent testing data for the following
pollutants. Provide the indicated effluent testing information and any other information required by the permitting authority for each ouffall through which
effluent is discharged. Do not include information on combined sewer overflows in this section. All Information reported must be based on data collected
through analyses conducted using 40 CFR Part 136 methods. In addition, these data must comply with QA/QC requirements of 40 CFR Part 136 and
other appropriate CA/QC requirements for standard methods for analytes not addressed by 40 CFR Part 136. Indicate in the blank rows provided below
any data you may have on pollutants not specifically listed in this form. At a minimum, effluent testing data must be based on at least three pollutant
scans and must be no more than four and one-half years old.
Outfall number: 001 (Complete once for each oulfall discharging effluent to waters of the United States.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
MLIMDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
Of
Samples
METALS (TOTAL RECOVERABLE), CYANIDE, PHENOLS, AND HARDNESS.
ANTIMONY
5.0
ug//L
g
5.0
ug//L
g
2
EPA 200.7
5.0 ug/L
ARSENIC
10.0
ug//L
g
10.0
ug//L
g
2
EPA 200.7
10.0 ug/L
BERYLLIUM
1.0
ug//L
g
1.0
ug//L
g
2
EPA 200.7
1.0 ug/L
CADMIUM
1.0
ug//L
g
1.0
ug//L
g
2
EPA 200.7
1.0 ug/L
CHROMIUM
5.0
ug//L
g
5.0
ug//L
g
2
EPA 200.7
5.0 ug/L
COPPER
5.0
ug//L
g
5.0
ugf/L
g
2
EPA 200.7
5.0 ug/L
LEAD
5.0
ug//L
g
5.0
ug//L
g
2
EPA 200.7
5.0 ug/L
MERCURY
0.5
ug9L
g
0.5
ug//L
g
2
EPA 1631E
0.50 ug/L
NICKEL
5.0
ug//L
g
5.0
ug//L
g
2
EPA 200.7
5.0 ug/L
SELENIUM
10.0
ugHL
g
10.0
ug//L
g
2
EPA 200.7
10.0 ug/L
SILVER
5.0
ugHL
g
5.0
ugl/L
g
2
EPA 200.7
5.0 ug/L
THALLIUM
10.0
ug//L
g
10.0
ug//L
g
2
EPA 200.7
10.0 ug/L
ZINC
109
ug//L
g
109
ug//L
g
13
EPA 200.7
10.0 ug/L
CYANIDE
0.005
mg//L
g
0.005
ug//L
g
2
SM 4500-CN-E
0.005 ug/L
TOTAL PHENOLIC
COMPOUNDS
0.015
mg//L
g
0.013
mg/L
g
2
EPA 420.4
0.01 mg/L
HARDNESS (as CaCO3)
60.9
mg//L
kg
49.4
mg/L
kg
2
SM 2340E
0.65 mg/L
Use this space (or a separate sheet) to
provide information on other metals requested by the permit writer
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 10 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek VWVfP, NCO088722
Plant Expansion Permit
Catawba
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
ML/MDL
Number
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
VOLATILE ORGANIC COMPOUNDS
ACROLEIN
10.0
ugIL
g
10.0
ugIL
g
2
EPA 8260
10.0 ugIL
ACRYLONITRILE
10.0
ug/L
g
10.0
ugIL
g
2
EPA 8260
10.0 ugIL
BENZENE
1.0
ug/L
g
1.0
ugIL
g
2
EPA 8260
1.0 ugIL
BROMOFORM
1.0
ug/L
g
1-0
ug/L
g
2
EPA 8260
1.0 ug/L
CARBON
TETRACHLORIDE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ug/L
CHLOROBENZENE
1.0
ug/L
g
1.0
ugIL
g
2
EPA 8260
1.0 ugIL
CHLORODIBROMO-
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
METHANE
CHLOROETHANE
1.0
ugIL
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
2-CHLOROETHYLVINYL
10.0
ug/L
g
10.0
ug/L
g
2
EPA 8260
10.0 ug/L
ETHER
CHLOROFORM
1.0
ug/L
g
1.0
ugIL
g
2
EPA 8260
1.0 ugIL
DICHLOROBROMO-
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ug/L
METHANE
1,1-DICHLOROETHANE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
1,2-DICHLOROETHANE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
I,2-DICHLORO-
1.0
ug/L
g
1.0
ugIL
g
2
EPA 8260
1.0 ug/L
ETHYLENE
ETHYL
1,1-DICHLORO-
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ug/L
ETHYLENE
1,2-DICHLOROPROPANE
1.0
ug/L
g
1.0
ugIL
g
2
EPA 8260
1.0 ugIL
1,3-DICHLORO-
1.0
ugIL
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
PROPYLENE
ETHYLBENZENE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
METHYL BROMIDE
2.0
ug/L
g
2.0
ug/L
g
2
EPA 8260
2.0 ugIL
METHYL CHLORIDE
1.0
ugIL
g
1.0
ugIL
g
2
EPA 8260
1.0 ugIL
METHYLENE CHLORIDE
2.0
ug/L
g
2.0
ug/L
g
2
EPA 8260
2.0 ugIL
1,1,2,2-TETRA
CHLOROETHANE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
TETRACHLORO-
ETHYLENE
1.0
ugIL
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
TOLUENE
1.0
ug/L
g
1.0
ug/L
g
2
EPA 8260
1.0 ugIL
PA Form 3510-2A (Rev. 1-99). Replaces EPA fors 7550-6 & 7550-22. Page 11 of 24

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:
Catawba
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
ML/MDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
TRIC
TRIOHLOROETHANE
1.0
ugHL
g
1.0
ugHL
g
2
EPA 8260
1.0 ug/L
1,1,2
TRICHLOROEfHANE
1.0
ug//L
g
1.0
ug//L
g
2
EPA 8260
1.0 ug/L
TRICHLOROETHYLENE
1.0
ug//L
9
1.0
ug//L
g
2
EPA 8260
1.0 ug/L
VINYL CHLORIDE
1.0
ug//L
g
1.0
ug//L
9
2
EPA 8260
1.0 ug/L
Use this space (or a separate sheet) to provide information on other volatile organic compounds requested by the permit writer
ACID -EXTRACTABLE COMPOUNDS
P-CHLORO-M-CRESOL
0
2-CHLOROPHENOL
10.0
ug//L
g
10.0
ug//L
g
2
EPA827
2,4-DICHLOROPHENOL
10.0
ug//L
9
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
2,4-DIMETHYLPHENOL
10.0
ugHL
9
10.0
ug//L
9
2
EPA 8270
10.0 uglL
4,6-DINITRO-0-CRESOL
20.0
ug//L
g
20.0
ug//L
9
2
EPA 8270
20.0 ug1L
2,4-DINITROPHENOL
50.0
ug//L
g
50.0
ug//L
9
2
EPA 8270
50.0 ug/L
2-NITROPHENOL
10.0
ug//L
9
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
4-NITROPHENOL
60.0
ug//L
9
50.0
ug//L
9
2
EPA 8270
50.0 ug/L
PENfACHLOROPHENOL
25.0
ug//L
9
25.0
ug//L
g
2
EPA 8270
25.0 ug/L
PHENOL
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
TRIOHLOROPHENOL
RIC
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
Use this space (or a separate sheet) to provide Information on other acid -extractable compounds requested by the permit writer
BASE -NEUTRAL COMPOUNDS -
ACENAPHTHENE
10.0
ug//L
g
10.0
ugl/L
g
3
EPA 8270
10.0 ug/L
ACENAPHTHYLENE
10.0
ug//L
g
10.0
ug//L
9
3
EPA 8270
10.0 ug/L
ANTHRACENE
10.0
ug//L
9
10.0
ug//L
9
3
EPA 8270
10.0 ug/L
BENZIDINE
50.0
ug//L
g
50.0
ug//L
9
3
EPA 8270
50.0 ug/L
BENZO(A)ANTHRACENE
10.0
ug//L
g
10.0
ug//L
9
3
EPA 8270
10.0 ug/L
BENZO(A)PYRENE
10.0
ugHL
g
10.0
ug//L
g
3
EPA 8270
10.0 ug/L
PA Farm 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 8 7550-22. Page 12 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek VVWrP, NCO088722
Plant Expansion Permit
Catawba
Outfall number: 001 (Complete once for each outfall discharging effluent to waters of the United States.)
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Number
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
of
METHOD
Samples
FLUORANTHENE
RANT
10.0
ug/IL
g
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
BENZO(GHI)PERYLENE
10.0
ugHL
g
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
BENZO(
10.0
ugHL
9
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
FLUORANTHENE
BIS (2-CHLOROETHOXY)
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
METHANE
BIS (2-CHLOROETHYL)-
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
ETHER
BIS (2-CHL-
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
THER
PROPYL)EETHER
BIS (2-ETHYLHEXYL)
10.0
ug//L
g
10.0
ug/L
g
2
EPA 8270
10.0 ug/L
PHTHALATE
HE
10.0
ug//L
g
10.0
ugnL
9
2
EPA 8270
10.0 ug/L
PHENYLETHER
PHENYLETHERR
BUTYL BENZYL
10.0
ug//L
9
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
PHTHALATE
ORO-
H THALENE
NA
NAPHTHAL
10.0
ug//L
g
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
L
10.0
ugHL
9
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
ETHER
PHENYL ETHER
PHENYL
CHRYSENE
10.0
ug/lL
9
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
DI-N-BUTYL PHTHALATE
10.0
ug//L
g
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
DI-N-OCTYL PHTHALATE
10.0
ugHL
g
10.0
ug/lL
g
EPA 8270
10.0 ug/L
DIBENZO(A,H)
10.0
ugHL
g
10.0
ugHL
gEPA
8270
10.0 ug/L
ANTHRACENE
r=2
1,2-DICHLOROBENZENE
10.0
ugHL
9
10.0
ug//L
gEPA
8270
10.0 ug/L
1,3-DICHLOROBENZENE
10.0
ugHL
g
10.0
ugHL
gEPA
8270
10.0 ug/L
1,4-DICHLOROBENZENE
10.0
ugHL
9
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
3,3-DICHLORO-
20.0
ug//L
9
20.0
ugUL
g
2
EPA 8270
20.0 ug/L
BENZIDINE
DIETHYL PHTHALATE
10.0
ug//L
g
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
DIMETHYL PHTHALATE
10.0
ug//L
9
10.0
ug//L
9
2
EPA 8270
10.0 ug/L
2,4-DINITROTOLUENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
2,6-DINITROTOLUENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
1,2-DIPHENYL-
10.0
ug//L
9
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
HYDRAZINE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7660-6 & 7550-22. Page 13 of 24

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:.
Catawba
Outfall number. 001 (Complete once for each cuffall discharging effluent to waters of the United Stales.)
POLLUTANT
MAXIMUM DAILY DISCHARGE
AVERAGE DAILY DISCHARGE
ANALYTICAL
METHOD
ML/MDL
Conc.
Units
Mass
Units
Conc.
Units
Mass
Units
Number
of
Samples
FLUORANTHENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
FLUORENE
10.0
ugl/L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
HEXACHLOROBENZENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
HEXA-
DIENE
BUTADIENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
HEXACHLOROCYCLO-
PENTADIENE
10.0
ug/IL
g
10.0
ugHL
g
2
EPA 8270
10.0 ugIL
HEXACHLOROETHANE
10.0
ugHL
g
10.0
ugHL
g
2
EPA 8270
10.0 ug/L
INDENO(1,2,3-CD)
PYRENE
10.0
ug/lL
g
10.0
ugf/L
g
2
EPA 8270
10.0 ug/L
ISOPHORONE
10.0
ugl/L
g
10.0
ugl/L
g
2
EPA 8270
10.0 ug/L
NAPHTHALENE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
NITROBENZENE
10.0
ug//L
g
10.0
ug//L
g
2
It
EPA 8270
10.0 ugIL
N-NPROSODI
PROPYLAMINE
10.0
ugl/L
g
10.0
ug//L
g
2
EPA 8270
10.0 ugIL
N-NITROSODI-
METHYLAMINE
METHY
10.0
ugl/L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
N-NiTROSODI-
PHENYLAMINE
10.0
ug//L
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
PHENANTHRENE
10.0
ugIL
g
10.0
ugllL
g
2
EPA 8270
10.0 ug/L
PYRENE
10.0
ug/IL
g
10.0
ug//L
g
2
EPA 8270
10.0 ug/L
1,2,4
TRICHLOROBENZENE
10.0
ug/IL
g
10.0
ug/lL
g
2
EPA 8270
10.0 ugIL
Use this space (or a separate sheet) to provide information on other base -neutral compounds requested by the permit writer
Use this space (or a separate sheet) to provide information on other pollutants (e.g., pesticides) requested by the permit writer
END OF PART D.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 14 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP , NCO088722
Plant Expansion Permit
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART E. TOXICITY TESTING DATA
POTWs meeting one or more of the following criteria must provide the results of whole effluent toxicity tests for acute or chronic toxicity for each of the
facility's discharge points: 1) POTWs with a design flow rate greater than or equal to 1.0 mgd; 2) POTWs with a pretreatment program (or those that are
required to have one under 40 CFR Part 403); or 3) POTWs required by the permitting authority to submit data for these parameters.
• At a minimum, these results must include quarterly testing for a 12-month period within the past 1 year using multiple species (minimum of two
species), or the results from four tests performed at least annually in the four and one-half years prior to the application, provided the results
show no appreciable toxicity, and testing for acute and/or chronic toxicity, depending on the range of receiving water dilution. Do not include
information on combined sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate QA/QC
requirements for standard methods for analyses not addressed by 40 CFR Part 136.
• In addition, submit the results of any other whole effluent toxicity tests from the past four and one-half years. If a whole effluent toxicity test
conducted during the past four and one-half years revealed toxicity, provide any information on the cause of the toxicity or any results of a
toxicity reduction evaluation, if one was conducted.
• If you have already submitted any of the information requested in Part E, you need not submit it again. Rather, provide the information
requested in question EA for previously submitted information. If EPA methods were not used, report the reasons for using alternate methods.
If test summaries are available that contain all of the information requested below, they may be submitted in place of Part E.
If no biomonitoring data is required, do not complete Part E. Refer to the Application Overview for directions on which other sections of the forth to
complete.
E.I. Required Tests.
Indicate the number of whole effluent toxicity tests conducted in the past four and one-half years
chronic acute
E.2. Individual Test Data. Complete the following chart for each whole effluent toxicity test conducted in the last four and one-half years. Allow one
column per test (where each species constitutes a test). Copy this page'rf more than three tests are being reported.
Test number: Test number: Test number:
a. Test information. Testing for aquatic species has not been performed within this permit testing cycle at this date.
Test Species & test method number
Age at initiation of test
Outfall number
Dates sample collected
Date test started
Duration
b. Give toxicity test methods followed.
Manual title
Edition number and year of publication
Page number(s)
c. Give the sample collection method(s) used. For multiple grab samples, indicate the number of grab samples used.
24-Hour composite
Grab
d. Indicate where the sample was taken in relation to disinfection. (Check all that apply for each.)
Before disinfection
After disinfection
After dechlorination
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 755" & 7550-22. Page 15 of 24

FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:
Catawba
Test number: 01 Test number: 02 Test number: 03
e. Describe the point in the treatment process at which the sample was collected.
Sample was collected:
I. For each test, include whether the test was intended to assess chronic toxicity, acute toxicity, or both
Chronic toxicity
Acute toxicity
g. Provide the type of test performed.
Static
Static -renewal
Flow -through
h. Source of dilution water. If laboratory water, specify type; if receiving water, specify source.
Laboratory water
Receiving water
i. Type of dilution water. If saltwater, specify "natural' or type of artificial sea salts or brine used.
Fresh water
Salt water
j. Give the percentage effluent used for all concentrations in the test series.
k. Parameters measured during the test. (Stale whether parameter meets test method specifications)
pH
Salinity
Temperature
Ammonia
Dissolved oxygen
I. Test Results.
Acute:
Percent survival in 100%
effluent
°
/o
LCs
95% C.I.
%
%
%
Control percent survival
%
%
%
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 16 of 24

Other (describe)
FACILITY NAME AND PERMIT NUMBER:
Killian Creek WWTP, NCO088722
PERMIT ACTION REQUESTED:
Plant Expansion Permit
RIVER BASIN:
Catawba
Chronic:
NOEC
%
%
%
Icss
%
%
%
Control percent survival
%
%
%
Other (describe)
m. Quality Control/Quality Assurance.
Is reference toxicant data available?
Was reference toxicant test within
acceptable bounds?
What date was reference toxicant test
run (MWDD/YYYY)?
Other(describe)
E.3. Toxicity Reduction Evaluation. Is the treatment works involved in a Toxicity Reduction Evaluation?
❑ Yes ❑ No If yes, describe:
E.4. Summary of Submitted Biomonitoring Test Information. If you have submitted biomonitoring test information, or information regarding the
cause of toxicity, within the past four and one-half years, provide the dates the information was submitted to the permitting authority and a summary
of the results.
Date submitted: / / (MM/DD/YYYY)
Summary of results: (see instructions)
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 17 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WVVfP, N00088722
Plant Expansion Permit
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant Industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject to, an approved pretreatment program?
❑ Yes ® No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
Industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 1 — Duke Energy (non -categorical)
b. Number of CIUs. NIA — NO CIUs in system.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Duke Energy Corporation— Lincoln Combustion Turbine Station
Mailing Address: 6769 Old Plank Road
Stanley NC 28164
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Wastewater from industrial water treatment process including filtration and ion exchange units for deionizalion of boiler feed waters.
F.S. Principal Product(s) and Raw Material(s).. Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Electric energy
Raw material(s): Combustion turbine Power generation utilizing natural gas with diesel fuel backup
F.S. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
<84,000 gpd ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits I@ Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
WA
PA Forth 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WWTP, NCO088722
Plant Expansion Permit
Catawba
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
WA
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ® No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
WA
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
N/A
F.15. Waste Treatment
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
N/A
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22, Page 19 of 24

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Killian Creek WVVTP, NCO088722
Plant Expansion Permit
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART G. COMBINED SEWER SYSTEMS — N/A
If the treatment works has a combined sewer system, complete Part G.
G.I. System Map. Provide a map indicating the following: (may be included with Basic Application Information)
a. All CSO discharge points.
b. Sensitive use areas potentially affected by CSOs (e.g., beaches, drinking water supplies, shellfish beds, sensitive aquatic ecosystems, and
outstanding natural resource waters).
C. Waters that support threatened and endangered species potentially affected by CSOs.
G.2. System Diagram. Provide a diagram, either in the map provided in GA or on a separate drawing, of the combined sewer collection system that
includes the following information.
a. Location of major sewer trunk lines, both combined and separate sanitary.
b. Locations of points where separate sanitary sewers feed into the combined sewer system.
C. Locations of in -line and off-line storage structures.
d. Locations of flow -regulating devices.
e. Locations of pump stations.
CSO OUTFALLS:
Complete questions G.3 through G.6 once for each CSO discharge point
G.3. Description of Outfall.
a. Outfall number N/A
b. Location
(City or town, if applicable) (Zip Code)
(County) (State)
(Latitude) (Longitude)
C. Distance from shore (if applicable) ft.
J. Depth below surface (if applicable) ft.
e. Which of the following were monitored during the last year for this CSO?
❑ Rainfall ❑ CSO pollutant concentrations ❑ CSO frequency
❑ CSO flow volume ❑ Receiving water quality
f. How many storm events were monitored during the last year?
GA. CSO Events.
a. Give the number of CSO events in the last year.
events (❑ actual or ❑ approx.)
b. Give the average duration per CSO event.
hours (❑ actual or ❑ approx.)
PA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550.6 & 7550-22. Page 20 of 24

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Killian Creek WWTP, NCO088722 Plant Expansion Permit Catawba
C. Give the average volume per CSO event.
million gallons (❑ actual or ❑ approx.)
d. Give the minimum rainfall that caused a CSO event in the last year
Inches of rainfall
G.S. Description of Receiving Waters.
a. Name of receiving water:
b. Name of watershed/dver/stream system:
United State Soil Conservation Service 14-digit watershed code (if known):
C. Name of Slate Management/River Basin:
United States Geological Survey 8-digit hydrologic cataloging unit code (if known):
G.6. CSO Operations.
Describe any known water quality impacts on the receiving water caused by this CSO (e.g., permanent or intermittent beach closings, permanent or
intermittent shell fish bed closings, fish kills, fish advisories, other recreational loss, or violation of any applicable Slate water quality standard).
WA
END OF PART G.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE.
PA Form 3510-2A (Rev. 1.99). Replaces EPA forms 7550-6 & 7550-22. Page 21 of 24

Additional information, if provided, will appear on the following pages.
ADDITIONAL INFORMATION
KILLIAN CREEK WWTP NPDES FORM 2A APPLICATION
NPDES Number: NC0088722
The following information is submitted as additional information to the NPDES Permit Application for the Killian
Creek WWTP:
Item # A.4 Collection System Information
The Killian Creek WWTP currently serves an area primarily in the Catawba Springs Township within the
Forney Creek and Killian Creek drainage basins. Based upon US Census information, the total 2015
population of this area is estimated to be approximately 24,444 capita. It is estimated that approximately
53.8% of this population or approximately 13,151 capita was served in 2015 by sewer. The current served
population estimate of 16,509 capita is based upon an interpopulation of projected population and served
percentage between 2015 and 2025.
Future proposed sewer expansions in the Anderson Creek and Leepers Creek drainage basins combined with
population growth within the Catawba Springs Township projects a potential sewer service population
approaching 54,189 capita by the year 2037.
Item # A.11 Description of Existing Treatment Process
The current wastewater treatment process permitted for 3.3 mgd consists of the following treatment units:
• Influent headworks including mechanically cleaned screen, by-pass manually cleaned screen and
vortex grit collection system.
• Sequencing Batch Reactors (SBR's) — 2 Basins
• Post Equalization Basin
• Effluent Tertiary Disk Filters
• Ultraviolet (UV) Disinfection
• Effluent V-notch Weir
• Reaeration Channel
• Aerobic Digestion — Primary and Secondary
• Sludge Holding Tank
• Sludge Dewatering Rotary Filter Press
A process flow diagram and narrative description of the current treatment system is attached
Item B.1 Inflow and Infiltration
Computation of inflow and infiltration at the Killian Creek WWTP is impacted by the sequencing batch reactor
(SBR) process and a post SBR equalization basin that can have an impact on effluent flow patterns.
Additionally, Duke Energy has a periodic discharge of process water not included in the potable water supply
that can impact the daily flow pattern.
Calculations of inflow utilizing a four (4) day dry period followed by a 1-inch or greater rainfall event indicate an
inflow for the collection system of 22 gpd/capita.
Calculations of infiltration utilizing wastewater flows from the two (2) wettest months compared to water use
records yields an estimated infiltration of 228 gpd/inch diameter mile; therefore, the infiltration was considered
to be negligible. This is likely associated with the large percentage of low pressure sewers within the system in
developed areas around Lake Norman.
NPDES FORM 2A Additional Information Page 22 of 24

Item B.5 Scheduled Improvements
The Killian Creek WWfP has a current NPDES tiered permit with an upper permitted discharge capacity of
3.35 mgd. The rapidly growing development within the service area projects a future wastewater treatment
capacity of approximately 6.6 mgd by the year 2037. To meet this treatment capacity, it is proposed to expand
the current treatment system by duplicating the current treatment process with the addition of the following unit
processes:
• New headworks including mechanical bar screen with manual screen by-pass, vortex grit removal
system and grit classifier.
• Influent flow splitter to distribute influent flow between four (4) sequencing batch reactors (SBR's).
• Alum addition system to supplement the SBR biological phosphorus removal.
• Two (2) new SBR basins utilizing jet aeration.
• Modifications to the existing SBR system to change from 5 each 4.8-hour cycles/day to 4 each 6-hour
cycles/day to increase anoxic contact for improved biological phosphorus removal and modifications to
the influent piping to better distribute flow within each SBR.
• Two (2) new effluent disk filters.
• Two (2) new ultraviolet disinfection (UV) channels with two (2) banks of UV lamps per channel.
• One (1) new rotary drum thickener for thickening waste activated sludge.
• Two (2) new aerobic digesters and one (1) new sludge holding tank.
• Two (2) new rotary disk filters for dewatering digested sludge.
The proposed equipment additions are to allow an increase in the plant capacity to 3.35 mgd and are not
associated with any imposed regulatory compliance or implementation schedules. These equipment additions
and several other plant modifications currently under consideration are to be accomplished in accordance with
the NCDER "Authorization to Construct" permitting program.
Attached are flow diagrams of the liquid train and solids handling process and a narrative description.
NPDES FORM 2A Additional Information Page 23 of 24

l 1 ` �a
1,
t, lDuke Energy
Drinking Water Well
Mile
NN
- �- � •° � Outfall 001 Location V'
Drinking Water Wells
1
fora x�it Rwk Hit
1 ey jaj jjoW
if
Q
y �' ) � .' "liaic� ' `. — `` '\� ( -� ' - .�. •yam.
CO
j:
National Geogiephic Society rceibeH
N
Killian Creek WWTP
NPDES Permit Renewal F&WK
1:z4,000 July 2014 rDICKSON
community Infrastructure consultants

N
Legend Killian Creek WWTP
Influent & Effluent Line NPDES Permit Renewal F&WK
1:10,000 July 2014 W D I C KSO N
communlly inlmstructum consultants

LIQUID TRAIN PROCESS FLOW DIAGRAM @ Q = 3.36 MGD PAGE 1 OF 2
KILLIAN CREEK WWTP
LINCOLN COUNTY
KILLIAN CREEK COLLECTION SYSTEM AND LIFT STATION #37
Q = 3.35 MGD (PLANT DESIGN AVERAGE DAILY FLOW)
HEADWORKS
CYLINDRICAL MECHANICAL BAR SCREEN
MANUALLY CLEANED BAR SCREEN BY-PASS
VORTEX GRIT SEPARATOR
GRIT CLASSIFIER
INFLUENT 24" PARSHALL FLUME W/ ULTRASONIC FLOW METER
FROM PLANT RECYCLE PUMP STATION (SEE PAGE 2)
Q=0.24MGD
SEQUENCING BATCH REACTORS
1 EA FLOATING MIXER PER SBR
10 DIFFUSED AIR MANIFOLDS PER SBR
4 BLOWERS (W/ 1 STANDBY)
1 EA SUBMERSIBLE SLUDGE PUMP PER SBR (W/ SHELF SPARE)
TO SOLIDS HANDLING SYSTEM (SEE PAGE 2)
Q = 0.13 MGD @ 0.5% Solids
POST EQUALIZATION BASIN
5 VARIABLE SPEED PUMPS
Q = 1.73 MGD
-----------------
EFFLUENT FILTER S
EFFLUENT FILTERS 3 DISK FILTER UNITS W/ 8 DISK/UNIT
FILTER BY-PASS
I
L- - - - -1- - - - *FILTER BACKWASH TO PLANT RECYCLE PUMP STATION (SEE PAGE 2)
Q = 1.68 MGD Q = 0.05 MGD
ULTRAVIOLET
ULTRAVIOLET DISINFECTION SYSTEM
DISINFECTION SYSTEM 4 UV BANKS W/ 8 UV MODULES & 128 LAMPS
EFFLUENT V NOTCH WEIR W/ ULTRASONIC FLOW METER
EFFLUENT REAERATION
IQ = 3.28 MGD
DISCHARGE 001 TO KILLIAN CREEK

SOLIDS HANDLING PROCESS FLOW DIAGRAM @ Q = 3.36 MGD PAGE 2 OF 2
KILLIAN CREEK WWTP
WASTE ACTIVATED SLUDGE
FROM SBR WAS PUMPS PAGE 1
__________________________ DIGESTER #1�BY—PASS
Q = 0.133 MGD @ 0.5% SOLIDS '
AEROBIC
DIGESTER#1 __________________�
DIGESTER DECANT t
Q = 0.111 MGD I
I
I
I AEROBIC SLUDGE DIGESTERS
Q = 0.011 MGD @ 2% SOLIDS FLOATING MIXERS
DIFFUSSED AERATION
I 4 BLOWERS (W/ 1 STANDBY)
AEROBIC f ---------------------------
_ i SLUDGE DECANTERS
DIGESTER :#2] I
-- - - - - - - - - - - - - - - - -
►I
DIGESTER DECANT
Q = 0.005 MGD
LIQ—UJRDJSP_QSAL 0-PUQN------------ boo t
I
Q = 0.006 MGD @ 2% SOLIDS ; I
1
SLUDGE HOLDING I SLUDGE HOLDING BASIN
BASIS FLOATING MIXERS
DECANT I DIFFUSED AERATION
Q = 0.01 MGD 1
Q = 0.006 MGD @ 2% SOLIDS I
I
SLUDGE PUMP t SLUDGE PUMP STATION
STATION LIQUID DISPOSAL OPTION _ SLUDGE MACERATOR
— -------------------
3 ROTARY LOBE PUMPS
t
Q = 0.006 MGD @ 2% SOLIDS I ROTARY PRESS SLUDGE DEWATERING
I 2 - POLYMER DILUTION & FEED SYSTEMS
ROTARY PRESS I 2 - ROTARY SLUDGE PRESSES
SLUDGE I SLUDGE CONVEYORS
-------- - - - - --
---►I
DEWATERING FILTRATE I
Q = 0.005 MGD
t FILTER BACKWASH (FROM PAGE 1)
SLUDGE = 1216 LBS/D @ 20% SOLIDS 1 I Q = 0.05 MGD
Q=0.185
,I PLANT RECYCLE
DEWATERED SLUDGE DISPOSAL PUMP STATION
TO LANDFILL OR LAND APPLICATION (DUPLEX PUMPS)
DISPOSAL OPTION Q = 0.006 MGD t
I Q = 0.235 MGD
♦ RECYCLE TO SBR SYSTEM
LIQUID SLUDGE (SEE PAGE 1)
TO LAND APPLICATION
DISPOSAL OPTION

POWER SUPPLY SCHEMATIC DIAGRAM
KILLIAN CREEK WWTP
DUKE ENERGY SUPPLY POWER
1050 KW, 480 V
PAGE 1 OF 1
DIESEL FUEL ENGINE
GENERATOR SET
'IC TRANSFER SWITCH
SS OF INCOMING POWER

INTENTIONALLY LEFT_ BLANK

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
A. LIQUID TRAIN PROCESS FLOW DIAGRAM @ Q = 3.35 MGD
1. Headworks
Wastewater enters the plant at the plant headworks. The plant headworks system includes a
mechanically cleaned cylindrical bar screen, by-pass manually cleaned bar screen, vortex grit
collector with a grit classifier and influent parshall flume.
The mechanically cleaned screen removes solids greater than 1/4" diameter. Screening from
the mechanical screen are washed and dewatered in an auger screw conveyor and placed into
a dumpster for landfill disposal. The manually cleaned bar screen with 1" bar openings
serves as a backup in event of failure of the mechanical screen.
A vortex grit separator is provided for removal of grit material potentially damaging to
downstream equipment. Grit removed from the wastewater is transferred to a grit classifier
for washing and dewatering in an auger conveyor as it is transferred into a dumpster for
landfill disposal.
An influent 24" Parshall flume and ultrasonic flow meter is provided for monitoring and
record influent flows and providing input to the influent sampler for flow proportional flow
sampling.
2. Sequencing Batch Reactors
Two sequencing batch reactors (SBR) provide biological treatment of the wastewater for
organic and solids reduction. Each SBR reactor includes a floating mixer for basin mixing,
fine bubble diffused aeration assemblies for aeration, floating decanters for effluent removal
and a sludge pump for transfer of waste activated sludge to the aerobic digesters. The SBR
process includes eight (8) potential phases of operation as follows:
• Static fill - fill with not mixing or aeration
• Mixed fill - fill with mixing without aeration
• Aerated fill -
• React -
• Settle -
• Decant -
• Sludge Wasting
• Idle -
fill with mixing and aeration
mixing and aeration with no fill
no mixing or aeration
removal of effluent supernatant
removal of sludge
no mixing or aeration
Wastewater is rotated between the SBR basins on a time cycle or based upon level.
Equipment redundancy is provided with multiple blowers with one unit provided as a reserve
in event of mechanical problems with either of the other two units. There is one (1)
submersible waste activated sludge transfer pump in each SBR basin with a shelf spare pump
maintained in storage in event of mechanical problems.
3. Post Equalization Basin
SBR effluent removed through the decanters is transferred into a post equalization basin for
storage following the short duration, high flow decanting operation. Variable speed pumps
then transfer the secondary treated effluent to the filtration system to provide a relative
Page 1 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
constant flow rate through the downstream filters and disinfection system. The current
system includes five (5) transfer pumps.
4. Effluent Filters
Effluent filtration is currently provided by three (3) disk filter units containing twelve (12)
filter disks per unit. Each filter has a maximum hydraulic capacity of 4.2 mgd and is
designed to produce an effluent containing less than 5 mg/l suspended solids. Filters
backwash is initiated on head loss through the filter by pulling filtered water back through
the filter media with the backwash sent to the plant drain for return to the SBR system.
5. Ultraviolet Disinfection
The ultraviolet disinfection system provides for reduction of fecal coliform. The ultraviolet
system currently includes 2 channels with two UV banks with 3 modules of 30 ultraviolet
lamps capable of treating up to 4.2 mgd per bank providing 100% backup when one bank is
taken out of service.
The ultraviolet system includes a final effluent V-notch weir and ultrasonic flow meter for
final effluent monitoring, recording and pacing an automatic flow proportional sampler.
6. Effluent Reaeration
Final effluent from the ultraviolet disinfection passes through a static reaeration structure in
route to the discharge point at Killian Creek. Aeration is provided by turbulence created in
the effluent flow as it encounters velocity baffles and the flow drops in elevation across the
structure.
Page 2 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
B. SOLIDS HANDLING PROCESS FLOW DIAGRAM @ Q = 3.35 MGD
1. Aerobic Sludge Digesters
The two stage aerobic sludge digestion process is capable of producing a final biosolids
product meeting the 40 CFR 503 requirements for Class B biosolids complying with the
pathogen reduction (mean cell residence of 60 days at 150 C) and vector attraction
requirements (38% reduction of volatile solids).
Waste activated sludge from the SBR system is first pumped into Aerobic Digester No. 1
where it can be decanted or pumped to a rotating drum thickener to yield an approximate 2%
to 2.4% solids. The sludge is then transferred to Digester No. 2 for further mixing, aeration
and decanting to maintain a minimum 2% solids consistency. Digester mixing is provided by
a floating mixer in each digester with aeration provided by coarse bubble diffusers. Four (4)
positive displacement blowers are provided with one unit for each digester and two (2)
blowers providing standby capacity to either digester.
As the digestion process is completed, the final Class B biosolids may be transferred to either
the sludge holding tank or directly to liquid tank trucks for land application.
2. Sludge Holding Tank
The sludge holding tank provides additional storage for the stabilized biosolids prior to
transfer to the dewatering process or liquid sludge disposal tank trucks. The storage tank
includes two floating mixers and a coarse bubble diffused aeration system. Periodic aeration
is possible by temporary diversion of air from Digester #2.
3. Sludge Pump Station
The sludge pump station includes a sludge macerator to reduce any large solids materials
potentially causing interference in the dewatering process and three (3) rotary lobe transfer
pumps. The rotary lobe transfer pumps are variable speed pumps and are controlled by the
sludge dewatering rotary press system to feed sludge to the dewatering process. One of the
rotary lobe pumps serves as a backup with the other pumps used for normal dewatering
operations.
4. Rotary Press Sludge Dewatering System
Two (2) rotary press sludge dewatering presses are available to receive waste biosolids
transferred from the sludge holding tanks by the rotary lobe sludge transfer pumps. Polymer
is added, and the mixture flocculated as it is feed to the rotary presses for final dewatering to
produce a final biosolids consistency capable of passing the paint filter test for landfill
disposal. The dewatered sludge is then transferred directly to the Lincoln County landfill.
Page 3 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
5. Alternative Liquid Land Application
The plant has piping options permitting the transfer of acceptable liquid biosolids directly to
a truck for transfer to approved land application sites. Prior to land application, the biosolids
must be confirmed to meet the required regulatory requirements for pathogen and vector
attraction.
C. POWER SUPPLY SCHEMATIC DIAGRAM @ Q = 3.35 MGD
The Killian Creek WWTP is supplied with a primary power source with an emergency
secondary power supply from a diesel fuel engine generator. The engine generator set is
each capable of providing secondary power to maintain the operation of the WWTP
operations in event of loss of the primary power.
An automatic transfer switch and controls are provided to automatically start the engine
generator upon loss of the primary power supply and transfer to the secondary power from
the engine generator. Upon re-establishment of the primary power source, the engine
generator operation will be terminated, and power supply transferred back to the primary
supplier.
Upon loss of primary power at the WWTP, the SCADA system will provide an alarm at the
WWTP Lab/Operations building control panel advising of the loss of primary power and
activation of the emergency engine generator set.
Page 4 of 4

LIQUID TRAIN PROCESS FLOW DIAGRAM @ Q = 6.6 MGD PAGE 1 OF 2
KILLIAN CREEK WWTP
LINCOLN COUNTY
KILLIAN CREEK COLLECTION SYSTEM AND LIFT STATION #37
= 6.6 MGD (PLANT DESIGN AVERAGE DAILY FLOW)
HEADWORKS
2 Ea. CYLINDRICAL MECHANICAL BAR SCREEN
HEADWORKS HEADWORKS 2 Ea. MANUALLY CLEANED BAR SCREEN BY-PASS
2 Ea. VORTEX GRIT SEPARATOR
2 Ea. GRIT CLASSIFIER
2 Ea. INFLUENT 24" PARSHALL FLUME W/ ULTRASONIC FLOW METER
TOTAL FLOW IN SCADA
SBR FLOW
SPLITTER ♦_________________
FROM PLANT RECYCLE PUMP STATION (SEE PAGE 2)
Q = 0.51 MGD
Q = 7.1 MGD
EACH SEQUENCING BATCH REACTORS
SBR #1 SBR 02 SBR 03 SBR 04 1 EA FLOATING MIXER PER SBR
10 DIFFUSED AIR MANIFOLDS PER SBR
4 BLOWERS (WI 1 STANDBY)
1 1 1 I
1 EA SUBMERSIBLE SLUDGE PUMP PER SBR (W/ SHELF SPARE)
1 1 1 1
I I 1
- — — — — ————L— — — — — ——— -— — — — — —— --y--- ► TO SOLIDS HANDLING SYSTEM (SEE PAGE 2)
Q = 0.33 MGD @ 0.5°% Solids
POST EQ BASIN #1 POST EQ BASIN #2
I I I POST EQUALIZATION BASIN
5 VARIABLE SPEED PUMPS
= 6.79 MGD
-�EFFLUENT FILTERS
EFFLUENT FILTERS 5 DISK FILTER UNITS W/ 8 DISK/UNIT
FILTER BY-PASS
I
L — — — — — — — — *FILTER BACKWASH TO PLANT RECYCLE PUMP STATION (SEE PAGE 2)
Q=6.6MGD Q=0.2MGD
ULTRAVIOLET ULTRAVIOLET DISINFECTION SYSTEM
DISINFECTION SYSTEM 4 UV CHANNELS W/ 2 UV BANKS/EA
• 8 UV BANKS W/ 3 UV MODULESIBANK & 10 LAMPS/MODULES
l 240 LAMPS TOTAL
EFFLUENT V-NOTCH WEIR W/ ULTRASONIC FLOW METER
EFFLUENT REAERATION
IQ = 6.59 MGD
DISCHARGE 001 TO KILLIAN CREEK

SOLIDS HANDLING PROCESS FLOW DIAGRAM @ Q = 6.6 MGD PAGE 2 OF 2
KILLIAN CREEK WWTP
WASTE ACTIVATED SLUDGE
FROM SBR WAS PUMPS PAGE 1
__________________________ DIGESTER #1♦BY-PASS
Q = 0.329 MGD @ 0.5% SOLIDS
AEROBIC ; AEROBIC SLUDGE DIGESTERS #1 & #3
DIGESTER #1 & #3 DIGESTER #1 & #3 - WAS HOLDING FOR RDT/DIGESTION
DIGESTER #1 - FLOATING MIXER & COARSE BUBBLE AERATION
DIGESTER #3 - JET MIXING/AERATION
4 BLOWERS (2 DUTY & 2 STANDBY)
1ROTARY DRUM
THICKENERS - - - - - - - - - - - - - - - R ROTARY DRUM THICKENERS - 2 EA.
(2 EA FILTRATE = 0.278 MGD I DESIGN CAPACITY = 400 GPM / EA
i I INFLUENT SOLIDS - 0.5 - 0.8%
I EFFLUENT SOLIDS - 2 - 5%
Q = 0.051 MGD @ 3% SOLIDS t
I
I
� I
AEROBIC f____________________________DIGESTER#2&#4
DIGESTER I DIGESTER #2 - FLOATING MIXER & COARSE BUBBLE AERATION
#2 & #4 t DIGESTER #4 - JET MIXING/AERATION
t 4 BLOWERS (2 DUTY & 2 STANDBY)
I
I
I IQIJJD DJSP_OSALDET110N-----------♦,
I
Q = 0.051 MGD @ 2% SOLIDS
I
SLUDGE HOLDING SLUDGE HOLDING BASINS #1 & #2
BASINS ' I FLOATING MIXERS
DECANT , I DIFFUSED AERATION
� I
Q = 0.051 MGD @ 2% SOLIDS
I
SLUDGE PUMP SLUDGE PUMP STATION #1 & #2
STATIONS LIQUID DISPOSAL OPTION _ ♦ I 2 SLUDGE MACERATORS
I 6 ROTARY LOBE PUMPS (4 DUTY & 2 STANDBY)
t
Q = 0.051 MGD @ 2% SOLIDS ROTARY PRESS SLUDGE DEWATERING
1 4 - POLYMER DILUTION & FEED SYSTEMS
ROTARY PRESS I 4 - ROTARY SLUDGE PRESSES
SLUDGE - - - - - - - - - - - - - - 2 SLUDGE CONVEYOR SYSTEMS
DEWATERING FILTRATE t
Q=0.044MGD I
I FILTER BACKWASH (FROM PAGE 1)
SLUDGE = 8,746 LBS/D @ 16% SOLIDS ; ; Q = 0.01 MGD
IQ = 0.42
-- - - - - - - PLANT RECYCLE
DEWATERED SLUDGE DISPOSAL PUMP STATION
TO LANDFILL OR LAND APPLICATION (DUPLEX PUMPS)
DISPOSAL OPTION t
IQ=0.43MGD
RECYCLE TO SBR SYSTEM
LIQUID SLUDGE (SEE PAGE 1)
TO LAND APPLICATION
DISPOSAL OPTION

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
A. LIQUID TRAIN PROCESS FLOW DIAGRAM @ Q = 6.6 MGD
1. Headworks
Wastewater enters the plant at the plant headworks. The plant headworks system currently includes a
mechanically cleaned cylindrical bar screen, by-pass manually cleaned bar screen, vortex grit
collector with a grit classifier and influent parshall flume. Expansion for the design capacity of 6.6
mgd will include the duplication of the existing headworks system.
The mechanically cleaned screens remove solids greater than diameter. Screening from the
mechanical screen are washed and dewatered in an auger screw conveyor and placed into a dumpster
for landfill disposal. The manually cleaned bar screens with 1" bar openings serves as a backup in
event of failure of either of the mechanical screens.
The vortex grit separators provide for removal of grit material potentially damaging to downstream
equipment. Grit removed from the wastewater is transferred to a grit classifier for washing and
dewatering in an auger conveyor as it is transferred into a dumpster for landfill disposal.
An influent 24" Parshall flume and ultrasonic flow meter is provided in each of the two (2) headword
systems for flow monitoring. The flows are totalized to provide an influent flow record and provide
input to the influent sampler for flow proportional flow sampling.
2. Sequencing Batch Reactor (SBR) Flow Splitter
Flow from the two (2) headworks systems is combined in the SBR flow splitter and distributed to the
SBR reactors by individual sluice gates operated automatically by the SBR control system. Alum can
also be added within the basin to assist with controlling effluent phosphorus levels.
3. Sequencing Batch Reactors
Four (4) sequencing batch reactors (SBR) provide biological treatment of the wastewater for organic
and solids reduction. The existing two (2) SBR reactors include floating mixers for basin mixing,
fine bubble diffused aeration assemblies for aeration. The proposed two (2) new SBR reactors will
include a jet mixing and aeration system eliminating the need for floating mixers and diffuser
assemblies. Each of the reactors will utilize floating decanters for effluent removal and sludge pumps
within each basin for transfer of waste activated sludge to the aerobic digesters.
The SBR process includes eight (8) potential phases of operation as follows:
• Static fill - fill with not mixing or aeration
• Mixed fill - fill with mixing without aeration
• Aerated fill -
• React -
• Settle -
• Decant -
• Sludge Wasting
• Idle -
fill with mixing and aeration
mixing and aeration with no fill
no mixing or aeration
removal of effluent supernatant
removal of sludge
no mixing or aeration
Wastewater is rotated between the SBR basins on a time cycle or based upon level.
Equipment redundancy is provided with multiple blowers with one unit provided as a reserve in event
of mechanical problems with either of the other two units. There is one (1) submersible waste
activated sludge transfer pump in each SBR basin with a shelf spare pump maintained in storage in
event of mechanical problems.
Page 1 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
4. Post Equalization Basin
SBR effluent removed through the decanters is transferred to post equalization basins for storage
following the short duration, high flow decanting operation. Variable speed pumps then transfer the
secondary treated effluent to the filtration system to provide a relative constant flow rate through the
downstream filters and disinfection system. The current system includes five (5) transfer pumps with
the proposed expansion to provide an new poste equalization basin and five (5) transfer pumps.
5. Effluent Filters
Effluent filtration is currently provided by three (3) disk filter units containing twelve (12) filter disks
per unit. The expansion to 6.6 mgd proposes to add two (2) new filters. Each filter has a maximum
hydraulic capacity of 4.2 mgd and is designed to produce an effluent containing less than 5 mg/1
suspended solids. Filters backwash is initiated on head loss through the filter by pulling filtered water
back through the filter media with the backwash sent to the plant drain for return to the SBR system.
6. Ultraviolet Disinfection
The ultraviolet disinfection system provides for reduction of fecal coliform. The ultraviolet system
currently includes 2 channels with two UV banks with 3 modules of 30 ultraviolet lamps capable of
treating up to 4.2 mgd per bank providing 100% backup when one bank is taken out of service. The
proposed expansion to 6.6 mgd will add two (2) new UV channels and four (4) new UV banks for a
total of eight (8) UV banks with each capable of treating up to 4.2 mgd capacity to provide 100%
backup capacity.
The ultraviolet system currently includes a final effluent 90-degree V-notch weir and ultrasonic flow
meter for final effluent monitoring, recording and pacing an automatic flow proportional sampler. As
the flow increases, the effluent weir will be changed to a 4-foot rectangular weir.
7. Effluent Reaeration
Final effluent from the ultraviolet disinfection passes through a static reaeration structure in route to
the discharge point at Killian Creek. Aeration is provided by turbulence created in the effluent flow
as it encounters velocity baffles and the flow drops in elevation across the structure.
Page 2 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
B. SOLIDS HANDLING PROCESS FLOW DIAGRAM @ Q = 6.6 MGD
1. Aerobic Sludge Digesters
The existing two -stage aerobic sludge digestion process is proposed to be duplicated for the plant
expansion to 6.6 mgd. The expanded solids handling system is designed to be capable of producing a
final biosolids product meeting the 40 CFR 503 requirements for Class B biosolids complying with
the pathogen reduction (mean cell residence of 60 days at 151 C) and vector attraction requirements
(38% reduction of volatile solids) for land application or dewatering and landfill disposal.
Waste activated sludge from each SBR system will be pumped into Aerobic Digester No. 1 or No. 3
where it can be decanted or pumped to a rotating drum thickener to yield an approximate 2% to 2.4%
solids for transfer to Digester No. 2 or No. 4 for further mixing, aeration and decanting to maintain a
minimum 2% solids consistency. The existing digesters utilize floating mixers with aeration provided
by coarse bubble diffusers. The proposed new Digester No. 3 and 4 are proposed to utilize jet mixing
and aeration. The four (4) existing positive displacement blowers are to be duplicated for the new
digestors providing each system with four (4) blowers with one blower serving as standby.
As the digestion process is completed, the final biosolids may be transferred to either the sludge
holding tanks or directly to liquid tank trucks for land application.
2. Sludge Holding Tanks
Two (2) sludge holding tanks are proposed to provide additional storage for the stabilized biosolids
prior to transfer to the dewatering process or liquid sludge disposal tank trucks. The existing storage
tank includes two floating mixers and a coarse bubble diffused aeration system. The new storage tank
with the new SBR/digester system is proposed to utilize jet mixing /aeration.
3. Sludge Pump Stations
The proposed plant expansion to 6.6 mgd will add a new sludge pump station similar to the existing
pump station. Each sludge pump station will include a sludge macerator to reduce any large solids
materials potentially causing interference in the dewatering process and three (3) rotary lobe transfer
pumps. The rotary lobe transfer pumps are variable speed pumps and are controlled by the sludge
dewatering rotary press system to feed sludge to the dewatering process. One of the rotary lobe
pumps serves as a backup with the other pumps used for normal dewatering operations.
4. Rotary Press Sludge Dewatering Systems
The proposed plant expansion to 6.6 mgd will include a duplication of the existing dewatering system
providing a total of four (4) rotary sludge presses for dewatering biosolids. The rotary press sludge
dewatering units receive waste biosolids transferred from the sludge holding tanks by the rotary lobe
sludge transfer pumps. Polymer is added, and the mixture flocculated as it is feed to the rotary
presses for final dewatering to produce a final biosolids consistency capable of passing the paint filter
test for landfill disposal. The dewatered sludge is then transferred directly to the Lincoln County
landfill.
Page 3 of 4

NARRATIVE DESCRIPTION OF PROCESS FLOW DIAGRAMS
KILLIAN CREEK WWTP
5. Alternative Liquid Land Application
The plant has piping options permitting the transfer of acceptable liquid biosolids directly to a truck
for transfer to approved land application sites. Prior to land application, the biosolids must be
confirmed to meet the required regulatory requirements for pathogen and vector attraction.
C. POWER SUPPLY SCHEMATIC DIAGRAM @ Q = 3.35 MGD
The Killian Creek WWTP is supplied with a primary power source with an emergency secondary
power supply from a diesel fuel engine generator. The engine generator set is each capable of
providing secondary power to maintain the operation of the WWTP operations in event of loss of the
primary power.
An automatic transfer switch and controls are provided to automatically start the engine generator
upon loss of the primary power supply and transfer to the secondary power from the engine generator.
Upon re-establishment of the primary power source, the engine generator operation will be
terminated, and power supply transferred back to the primary supplier.
Upon loss of primary power at the WWTP, the SCADA system will provide an alarm at the WWTP
Lab/Operations building control panel advising of the loss of primary power and activation of the
emergency engine generator set.
Page 4 of 4