NC0024147_Renewal (Application)_20220322

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ROYCOOPER ,~ Al, 't
Governor '• .-.. v
ELIZABETH S.BISER `. "^aum .
Secretary ``@` "a =
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
March 22, 2022
City of Sanford
Attn: Victor Czar, Public Works Dir.
PO Box 3729
Sanford, NC 27331-3729
Subject: Permit Renewal
Application No. NC0O24147
Big Buffalo WWTP
Lee County
Dear Applicant:
The Water Quality Permitting Section acknowledges the March 22, 2022 receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. Per G.S. 150B-3 your current permit does not expire until permit decision on the application is made.
Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
httos://deo.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
3.c.b*NCOLAW
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
cc: Anthony Young-Hazen
ec: WQPS Laserfiche File w/application
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of Environmental Quaftty I Division of Water R00 Barrett Drive 1 Raelgh,North Carolina 276
1

NPDES Permit Application
No.NC0024147
Big Buffalo
Wastewater Treatment Plant
54NORTH CAROLINA
March 2022

swipe.
PO Box 3729 v . �' Fax:[phone]
Sanford,NC 27331-3729 e Phone: [phone]
mato Email: [e-mail]
CITY OF SANFORD
March 17,2022 Victor I.Czar,P.E.
Public Works Director
Mr.Mike Montebello
Water Quality Permitting Section—NPDES Unit
Division of Water Resources
North Carolina Department of Environmental Quality
1617 Mail Service Center
Raleigh, State,27699-1617
Re: NPDES Permit Renewal
Big Buffalo Wastewater Treatment Plant(NC0024147)
City of Sanford
Dear Mr. Montebello:
The City of Sanford Public Works Department is permitted to discharge 12.0 million gallons per day
(mgd)of treated effluent from the Big Buffalo Wastewater Treatment Plant(WWTP)to the Deep River
via North Carolina National Pollutant Discharge Elimination System(NPDES)Permit NC0024147.Our
NPDES permit is scheduled to expire on September 30,2022.
The enclosed application is for the renewal of this permit. In accordance with the requirements of federal
(40 CFR 122)and state(15A NCAC 2H.0105(3))regulations,we are submitting three signed copies of
the completed application package and associated attachments and figures. The application package
includes the following information delineated by tabs:
• Tab A: NPDES Permit Application EPA Form 2A
• Tab B: EPA Form 2A Additional Information(Topographic Map,Process Flow Diagram
and Process Narrative)
• Tab C: Big Buffalo WWTP Sludge Management Plan
• Tab D: Summary of First Species Effluent Toxicity Testing, 2017 to 2021
• Tab E: Annual Priority Pollutant Analysis Results,2018 to 2021
• Tab F: Second Species Effluent Toxicity Testing,2017 to 2021
• Tab G: Summary and Analytical Data for Upstream Hardness Testing
• Tab H: Summary of Emerging Compounds(PFAS and 1,4-Dioxane)
• Tab I: Technical Memorandum in support of the Reduction of Monitoring Frequency for
Exceptionally Performing Facilities
We offer the Division of Water Resources(DWR)the following comments:

1. Whole Effluent Toxicity Testing
The Draft NPDES permit currently contains a requirement for quarterly chronic whole effluent toxicity
(WET)testing.Prior to the changes implemented as a result of the Triennial Review,quarterly chronic
WET testing was implemented in conjunction with the water quality action level status for copper,zinc,
silver,and iron.The approved Water Quality Standard Triennial Review approach removes the action
level status of these four pollutants.EPA requirements for toxicity testing include four WET serial
dilution tests conducted annually in the 4.5-year permit cycle or four serial dilution tests in the 12-month
period prior to renewal. Tests must be conducted using multiple species.
There are two provisions in the North Carolina Administrative Code(NCAC)that allow DWR the
authority to depart from quarterly chronic toxicity testing in favor of EPA requirements.Modification of
test requirements is codified in 15A NCAC 02B .0508(b). Specific frequency of WET testing defined by
individual permit conditions is codified in 15A NCAC 02B .0508(d)(**).
The Big Buffalo WWTP consistently passed the quarterly chronic pass/fail WET tests during the previous
permit cycle.We respectfully request that the Division reduce chronic toxicity testing to EPA frequency
and requirements.
2. Metals and Reasonable Potential
Hazen and Sawyer conducted a reasonable potential analysis using our effluent metals,upstream
hardness,and effluent hardness data from January 2017 to December 2021.Arsenic,cadmium,
chromium,copper, lead,nickel,silver, selenium,and zinc all demonstrated maximum predicted effluent
concentrations less than 50% of the allowable receiving stream concentration. We have been using a
lower analytical detection level for metals via EPA Method 200.8 (ICP-MS)for data collected as part of
our Long-Term Monitoring Plan.
We would like to note that all of our Long-Term Monitoring Plan data for silver between 2017 and 2021
was less than the 1.0 ug/L detection level using EPA Method 200.8. Our Priority Pollutant Analysis scan
data was analyzed with a 5.0 ng/L detection level for silver using EPA Method 200.7. Our understanding
is that the use of the larger Long Term Monitoring Plan data set with the lower analytical detection level
will not result in additional monitoring or a permit limit for silver provided that the entire data set is less
than analytical detection.
Our NPDES permit contains an effluent monitoring requirement for copper.As stated in the current Fact
Sheet(page 7),the basis for this monitoring requirement is the maximum predicted copper concentration
was greater than 50%of the allowable receiving stream concentration using data prior to 2017. The
effluent monitoring requirement for copper should be removed from our permit based on the updated
reasonable potential analysis.
3. Reduction of Monitoring Frequency
In accordance with 15A NCAC 2B .0508(b)(1)and the October 2012 DWR Guidance Document for the
Reduction of Monitoring Frequency for Exceptionally Performing Facilities,we request a continuation in
reduction in monitoring frequency for biochemical oxygen demand(BOD5),total suspended solids(TSS),
ammonia, and fecal coliform.Effluent sampling results from the past three years demonstrate that all state

regulatory and guidance requirements have been met in support of this request.A complete summary of
the sampling data and analysis for the reduction of monitoring frequency is attached in Tab I of this
renewal application package.An Excel spreadsheet with the supporting calculations will be sent to DWR
upon request.
4. Upstream Hardness Data
The City has been collecting hardness data upstream of our effluent outfall as of January 2017 based on
the NPDES Implementation of Instream Dissolved Metals Standards—Freshwater Standards(2016)
guidance document issued by DWR. The hardness data is reported on our DMRs;however,we have
provided a summary table in Tab G of this application package.
5. Mercury
A summary of our effluent mercury data is provided in Table 1. In 2017,2018,and 2019 the results
indicate a result greater than the 1.0 ng/L detection level using Method 1631 for one sample out of the
five samples taken each year.The 2020 and 2021 data demonstrate results less than the 1 ng/L detection
level.The annual average does not exceed the water quality based effluent limit(WQBEL)of 12.0 ng/L.
Only one industry discharges mercury to our WWTP and only on an intermittent basis.
Table 1: Summary of Effluent Mercury
2017 2018 2019 2020 2021
Number of samples 5 5 5 5 5
Annual average 1.23 1.32 1.74 < 1.0 < 1.0
concentration,ng/L
Maximum 2.15 2.62 4.7 < 1.0 < 1.0
concentration,ng/L
The City is in compliance with the Dental Amalgam Rule per 40 CFR 441.The Rule requires three parts:
Part 1 —Outreach(Notification and Identification)to Dental Dischargers; Part II—Industrial Waste
Surveys; and Part III—One Time Compliance Report(OTCR)Activities by POTW.Guidance was
provided by DWR for options to implement each Part. The following is a discussion of the
implementation options we selected:
• Part I,Option 3 (Individual Dental Discharger Outreach)
o We developed a list of potential Dental Dischargers and provided notification via email,
letter, or certified mail per 40 CFR Part 441.
• Part II, Option 1 (Eliminate Dental Dischargers from IWS process as they are unlikely to have a
reasonable potential to adversely impact the POTW)
o We mailed One Time Compliance Reports(e.g.,Dental Facility Mercury Surveys)to the
27 dentists identified in the Big Buffalo WWTP sewershed.Approximately one-third of the
OTCRs were returned. The survey completion deadline was near the start of the COVID-19
pandemic in March 2020,which caused many of these facilities to close. The returned
surveys indicated that several Dental Dischargers no longer use mercury-containing
amalgams.For the Dental Dischargers that are still using mercury-containing amalgams,

the mercury is collected separately and disposed of off-site by a third party.We intend to
re-mail the surveys to all 27 identified dentists to update our database now that the
pandemic is waning.
• Part III, Option 1 (Receive OTCR,Review OTCR,and Retain OTCR)
o We prepared the OTCRs and mailed them to Dental Dischargers.The survey responses
were reviewed. The documents remain on file in our office.
Our understanding is that the Mercury Strategy for existing municipal facilities without a mercury permit
limit includes the following:
• Monitoring for mercury in conjunction with the priority pollutant analysis.
• Developing an MMP that would identify contributors and goals for reduction[the
facility has consistent detectable mercury concentrations in the effluent.
Our effluent does not have consistent detectable mercury. Out of 25 data points,the results of our effluent
mercury sampling have demonstrated only three results higher than the detection level of 1.0 ng/L. These
three samples were at least two and a half years old.Additionally,the City has complied with the Dental
Amalgam Rule. Therefore,a Mercury Minimization Plan(MMP)should not be applied to our permit in
this next permit cycle.
6. Other Contaminants
We are submitting additional information with this NPDES renewal package per Session Law 2018-5
(Senate Bill 99, Section 13.1(r)). At the request of DWR,we conducted additional effluent sampling for
1,4-dioxane. This analysis was conducted per EPA Method 624.1,which is a certified method in 40 CFR
Part 136. The 1,4-dioxane sample results have been added to Table D of EPA Form 2A. A summary of
the 1,4-dioxane data is also included in Tab H of this NDPES renewal application package.
At the request of DWR,we also conducted influent and effluent sampling for a series of PFOA/PFOS
analytes in 2019 and 2020.This sampling is not certified by the City as there is no certified analytical
method per 40 CFR Part 136 for these analytes. This data has been provided to DEQ previously;however,
a summary of this data is provided in Tab H of this NPDES renewal application.
7. Summary
We request the following information as part of the draft permit preparation:
• A copy of the draft permit to review prior to public notice with a 30-day comment period.
• A copy of the permit Fact Sheet.
• Documentation for any methodology,data,and assumptions used in any permit
modification, including an electronic copy of DWR's Reasonable Potential Analyses
spreadsheet.
• A copy of any comments that are received from the public during the public notice
period, if applicable.

In conclusion,we appreciate the time and effort of the NPDES Unit to consider our comments and
requests for this permit renewal. Please do not hesitate to call me at(919)777-1117 or email me at
[e-mail] if you have any questions.
Sincerely,
Victor Czar, PE
Public Works Director
cc: Jeff Poupart,Division of Water Resources
Paul Weeks,PE, City of Sanford
Scott Siletzky,City of Sanford
Sarah Jordan,City of Sanford
Mary Sadler, PE,Hazen and Sawyer

City of Sanford
Big Buffalo Wastewater Treatment Plant
NPDES Permit No.NC0024147
Outfall 001
Table of Contents
Tab A. EPA Form 2A
Tab B. EPA Form 2A Additional Information
a. Topographic Map
i. B.2-Figure 1
b. Process Narrative (Attachment 1)
c. Process Flow Diagram
i. B.3 Figure 1
Tab C. Sludge Management Plan
Tab D. Summary of First Species Effluent Toxicity Testing,2017 to 2021
Tab E. Annual Priority Pollutant Analysis Results,2018 to 2021
Tab F. Second Species Toxicity Testing Results,2017 to 2021
Tab G. Summary and Analytical Data for Upstream Hardness Testing
Tab H. Summary of Emerging Compounds(PFAs and 1,4-Dioxane)
Tab I. Technical Memorandum in support of the Reduction of Monitoring Frequency for
Exceptionally Performing Facilities

Tab A

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Form
2A
NPDES
a EPA
U.S. Environmental Protection Agency
Application for NPDES Permit to Discharge Wastewater
NEW AND EXISTING PUBLICLY OWNED TREATMENT WORKS
SECTION 1. BASIC
APPLICATION INFORMATION FOR ALL APPLICANTS (40 CFR 122.21(j)(1) and (9))
Facility Information
1.1
Facility name
Big Buffalo Wastewater Treatment Plant
Mailing address (street or P.O. box)
P.O. Box 3729
City or town
Sanford
State
NC
ZIP code
27331
Contact name (first and last)
Scott Siletzky
Title
Water Reclamation Facility Admir,istrator
Phone number
[phone]
Email address
[e-mail]
Location address (street, route number, or other specific identifier)
5327 Iron Furnace Road
❑ Same as mailing
address
City or town
Sanford
State
NC
ZIP code
27330
1.2
Is this application for a facility that has yet to commence discharge?
❑ Yes 4 See instructions on data submission
requirements for new dischargers.
✓
No
Applicant Information
1.3
Is applicant
✓
different from entity listed under Item 1.1 above?
Yes ❑ No 4 SKIP to Item 1.4.
Applicant name
City of Sanford Public Works Department
Applicant address (street or P.O. box)
P.O. Box 3729
City or town
Sanford
State
NC
ZIP code
27331
Contact name (first and last)
Victor Czar
Title
Public Works Director
Phone number
[phone]
Email address
[e-mail]
1.4
Is the applicant the facility's owner, operator, or both? (Check only one response.)
❑ Owner ❑ Operator
✓
Both
1.5
To which entity should the NPDES permitting
❑ Facility
✓
authority send correspondence? (Check only one response.)
Applicant ❑ Facility and applicant
(they are one and the same)
Existing Environmental Permits
1.6
Indicate below any existing environmental permits. (Check all that apply and print or type the corresponding permit
number for each.)
Existing Environmental Permits
✓
NPDES (discharges to surface
water)
NC0024147
❑ RCRA (hazardous waste)
❑ UIC (underground injection
control)
❑ PSD (air emissions)
❑ Nonattainment program (CAA)
❑ NESHAPs (CAA)
❑ Ocean dumping (MPRSA)
❑ Dredge or fill (CWA Section
404)
✓
Other (specify)
WQ0000543 / WQ0020248
EPA Form 3510-2A (Revised 3-19)
Page 1

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Collection System and Population Served
1.7
Provide the collection system information requested below for the treatment works.
Municipality
Served
Population
Served
Collection System Type
(indicate percentage)
Ownership Status
no % separate sanitary sewer
0 Own 0 Maintain
Sanford
26,945
% combined storm and sanitary sewer
0 Own 0 Maintain
❑ Unknown
0 Own 0 Maintain
% separate sanitary sewer
0 Own ❑ Maintain
% combined storm and sanitary sewer
❑ Own ❑ Maintain
❑ Unknown
0 Own ❑ Maintain
% separate sanitary sewer
0 Own ❑ Maintain
% combined storm and sanitary sewer
0 Own 0 Maintain
❑ Unknown
0 Own 0 Maintain
% separate sanitary sewer
0 Own 0 Maintain
% combined storm and sanitary sewer
0 Own ❑ Maintain
Total
Population
Served
26,945
❑ Unknown
❑ Own ❑ Maintain
Separate Sanitary Sewer System
Combined Storm and
Sanitary Sewer
Total percentage of each type of
sewer line (in miles)
o
no/o
0
/o
Indian Country
1.8
Is the treatment works located in Indian
❑ Yes
Country?
✓
No
1.9
Does the facility discharge to a receiving
❑ Yes
water that flows through
✓
Indian Country?
No
Design and Actual
Flow Rates
1.10
Provide design and actual flow rates
in the designated spaces.
Design Flow Rate
12.o mgd
Annual Average Flow Rates (Actual)
Two Years Ago
Last Year
This Year
5.72 mgd
6.09 mgd
4.11 mgd
Maximum Daily Flow Rates (Actual)
Two Years Ago
Last Year
This Year
13.16 mgd
17.63 mgd
14.75 mgd
Discharge Points
by Type
1.11
Provide the total number of effluent discharge points to waters of the United States by type.
Total Number of Effluent Discharge Points by Type
Treated Effluent
Untreated Effluent
Combined Sewer
Overflows
Bypasses
Constructed
Emergency
Overflows
1
0
0
0
0
EPA Form 3510-2A (Revised 3-19)
Page 2

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Outfalls and Other Discharge or Disposal Methods
Outfalls Other Than to Waters of the United States
1.12
Does the POTW discharge wastewater to basins, ponds,
discharge to waters of the United States?
❑ Yes
or other
surface impoundments that do not have outlets for
4 SKIP to Item 1.14.
✓ No
1.13
Provide the location of each surface impoundment and associated discharge information in the table below.
Surface Impoundment Location and Discharge Data
Location
Average Daily Volume
Discharged to Surface
Impoundment
Continuous or Intermittent
(check one)
gpd
❑ Continuous
❑ Intermittent
gpd
❑ Continuous
❑ Intermittent
gpd
❑ Continuous
0 Intermittent
1.14
Is wastewater applied to land?
❑ Yes
4 SKIP to Item 1.16.
✓ No
1.15
Provide the land application site and discharge data requested below.
Land Application Site and Discharge Data
Location
Size
Average Daily Volume
Applied
Continuous or
Intermittent
(check one)
acresgpd
❑ Continuous
❑ Intermittent
acresgpd
❑ Continuous
❑ Intermittent
acresgpd
❑ Continuous
❑ Intermittent
1.16
Is effluent transported to another facility for
❑ Yes
treatment prior to discharge?
4 SKIP to Item 1.21.
1 No
1.17
Describe the means by which the effluent is transported (e.g., tank truck, pipe).
1.18
Is the effluent transported by a party other than
❑ Yes
the applicant?
4 SKIP to Item 1.20.
✓
No
1.19
Provide information on the transporter below.
Transporter Data
Entity name
Mailing address (street or P.O. box)
City or town
State
ZIP code
Contact name (first and last)
Title
Phone number
Email address
EPA Form 3510-2A (Revised 3-19)
Page 3

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Outfalls and Other Discharge or Disposal Methods Continued
1.20
In the table below, indicate the name, address, contact information, NPDES number, and average daily flow rate of the
receiving facility.
Receiving Facility Data
Facility name
Mailing address (street or P.O. box)
City or town
State
ZIP code
Contact name (first and last)
Title
Phone number
Email address
NPDES number of receiving facility (if any) 0 None
Average daily flow rate mgd
1.21
Is the
have
✓
wastewater disposed of in a manner other than those already mentioned in Items 1.14 through 1.21 that do not
outlets to waters of the United States (e.g., underground percolation, underground injection)?
Yes ❑ No 4 SKIP to Item 1.23.
1.22
Provide information in the table below on these other disposal methods.
Information on Other Disposal Methods
Disposal
Method
Description
Location of
Disposal Site
Size of
Disposal Site
Annual Average
Daily Discharge
Volume
Continuous or Intermittent
(check one)
Reuse Water
Distribution
City of Sanford
Golf Course
152 acres
9,000 gpd
0 Continuous
❑ Intermittent
acres
gpd
0 Continuous
0 Intermittent
acres
gpd
0 Continuous
0 Intermittent
Variance
Requests
1.23
Do
Consult
❑
✓
you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)? (Check all that apply.
with your NPDES permitting authority to determine what information needs to be submitted and when.)
Discharges into marine waters (CWA ❑ Water quality related effluent limitation (CWA Section
Section 301(h)) 302(b)(2))
Not applicable
Contractor Information
1.24
Are any operational or maintenance aspects (related to
the responsibility of a contractor?
❑ Yes ✓
wastewater treatment and effluent quality) of the treatment works
No +SKIP to Section 2.
1.25
Provide location and contact information for each contractor in addition to a description of the contractor's operational
and maintenance responsibilities.
Contractor Information
Contractor 1
Contractor 2
Contractor 3
Contractor name
(company name)
Mailing address
(street or P.O. box)
City, state, and ZIP
code
Contact name (first and
last)
Phone number
Email address
Operational and
maintenance
responsibilities of
contractor
EPA Form 3510-2A (Revised 3-19)
Page 4

EPA
SECTION
c
Identification Number
110007670332
2. ADDITIONAL INFORMATION
Outfalls to Waters of
NPDES Permit Number
NC0024147
(40 CFR 122.21(j)(1) and
the United States
Facility Name
Big Buffalo WWTP
(2))
Form Approved 03/05/19
OMB No. 2040-0004
2.1
Does the treatment
works have a design flow greater than or equal to 0.1 mgd?
❑ No 4 SKIP to Section 3.
✓ Yes
Inflow and Infiltration
2.2
Provide the treatment works' current average daily volume of inflow
and infiltration.
Average Daily Volume of Inflow and Infiltration
1,014,000 gpd
Indicate the steps the facility is taking to minimize inflow and infiltration.
The City of Sanford is maintaining ongoing efforts to assess, minimize and correct inflow and infiltration in their
distribution system.
Topographic
Map
2.3
Have you attached
specific requirements.)
a topographic map to this application that contains all the required information? (See instructions for
❑ No
✓ Yes
Flow
Diagram
2.4
Have you attached
(See instructions
a process flow diagram or schematic to this application that contains all the required information?
for specific requirements.)
❑ No
✓ Yes
Scheduled Improvements and Schedules of Implementation
2.5
Are improvements to the facility scheduled?
❑ Yes
No 4 SKIP to Section 3.
✓
Briefly list and describe the scheduled improvements.
1.
2.
3.
4.
2.6
Provide scheduled or actual dates of completion for improvements.
Scheduled or Actual Dates of Completion for Improvements
Scheduled
Improvement
(from above)
Affected
Outfalls
(list outfall
number)
Begin
Construction
(MM/DD/YYYY)
End
Construction
(MM/DD/YYYY)
Begin
Discharge
(MM/DD/YYYY)
Attainment of
Operational
Level
(MM/DD/YYYY)
1.
2.
3.
4.
2.7
Have appropriate permits/clearances concerning other federal/state requirements been obtained? Briefly explain your
response.
❑ Yes ❑ No ❑ None required or applicable
Explanation:
EPA Form 3510-2A (Revised 3-19)
Page 5

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Description of Outfalls
ORMATION ON EFFLUENT DISCHARGES (40 CFR 122.21(j)(3) to (5))
Provide the following information for each outfall. (Attach additional sheets if you have more than three outfalls.)
Outfall Number o01
Outfall Number N/A
Outfall Number N/A
State
NC
County
Lee
City or town
Sanford
Distance from shore
N/A ft.
ft.
ft.
Depth below surface
N/A ft.
ft.
ft.
Average daily flow rate
4.11 mgd
mgd
mgd
Latitude
35° 33' Or
°
°
Longitude
79° 13' 29" W
"
Seasonal or Periodic Discharge Data
3.2
Do any of the outfalls described
❑ Yes
under Item 3.1 have seasonal or
periodic
✓
discharges?
No 4 SKIP to Item 3.4.
3.3
If so, provide the following information
for each applicable outfall.
Outfall Number
Outfall Number
Outfall Number
Number of times per year
discharge occurs
Average duration of each
discharge (specify units)
Average flow of each
discharge
mgd
mgd
mgd
Months in which discharge
occurs
Diffuser Type
3.4
Are any of the outfalls listed under Item 3.1 equipped with a diffuser?
❑ Yes
✓
No 4 SKIP to Item 3.6.
3.5
Briefly describe the diffuser t pe at each applicable outfall.
Outfall Number
Outfall Number
Outfall Number
Waters of
the U.S.
3.6
Does
discharge
✓
the treatment works discharge or plan to discharge wastewater to waters of the United States from one or more
points?
Yes ❑ No 4SKIP to Section 6.
EPA Form 3510-2A (Revised 3-19)
Page 6

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Receiving Water Description
3.7
Provide the receiving water and related information (if known) for each outfall.
Outfall Number 001
Outfall Number NSA
Outfall Number NSA
Receiving water name
Deep River
Name of watershed, river,
or stream system
Deep River
U.S. Soil Conservation
Service 14-digit watershed
code
030300030607
Name of state
management/river basin
Cape Fear
U.S. Geological Survey
8-digit hydrologic
cataloging unit code
03030003
Critical low flow (acute)
22.5 (7Q10) cfs
cfs
cfs
Critical low flow (chronic)
N/A cfs
cfs
cfs
Total hardness at critical
low flow
mg/L of
42 CaCO3
mg/L of
CaCO3
mg/L of
CaCO3
Treatment Description
3.8
Provide the following information describing the treatment provided for discharges from each outfall.
Outfall Number 001
Outfall Number NSA
Outfall Number NIA
Highest Level of
Treatment (check all that
apply per outfall)
0 Primary
0 Equivalent to
secondary
❑ Secondary
0 Advanced
❑ Other (specify)
0 Primary
0 Equivalent to
secondary
0 Secondary
0 Advanced
0 Other (specify)
❑ Primary
❑ Equivalent to
secondary
0 Secondary
0 Advanced
0 Other (specify)
Design Removal Rates by
Outfall
BOD5 or CBOD5
98
TSS
98 %
%
ok
Phosphorus
❑ Not applicable
86 %
0 Not applicable
°h)
0 Not applicable
%
Nitrogen
❑ Not applicable
87 %
0 Not applicable
° /o
0 Not applicable
°
/o
Other (specify)
N/A
0 Not applicable
%
0 Not applicable
0 Not applicable
EPA Form 3510-2A (Revised 3-19)
Page 7

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Treatment Description Continued
3.9
Describe the type of disinfection used for the effluent from each outfall in the table below. If disinfection varies by
season, describe below.
Ultraviolet Disinfection
Outfall Number
001
Outfall Number
Outfall Number
Disinfection type
UV Disinfection
Seasons used
All Seasons
Dechlorination used?
i
Not applicable
❑ Not applicable
❑ Yes
❑ No
❑ Not applicable
❑ Yes
❑ No
❑ Yes
❑ No
Effluent Testing Data
3.10
Have you completed
monitoring for all Table A parameters and attached the results to the application package?
❑ No
1 Yes
3.11
Have you conducted
discharges or
any WET tests during the 4.5 years prior to the date of the application on any of the facility's
on any receiving water near the discharge points?
❑ No 4 SKIP to Item 3.13.
1 Yes
3.12
Indicate the number of acute and chronic WET tests conducted since the last permit reissuance of the facility's
discharges by outfall number or of the receiving water near the discharge points.
Outfall Number 001
Outfall Number
Outfall Number
Acute
Chronic
Acute
Chronic
Acute
Chronic
Number of tests of discharge
water
5
19
Number of tests of receiving
water
o
0
3.13
Does the treatment
works have a design flow greater than or equal to 0.1 mgd?
❑ No 4 SKIP to Item 3.16.
1 Yes
3.14
Does the POTW use chlorine for disinfection, use chlorine elsewhere
reasonable potential to discharge chlorine in its effluent?
❑ Yes 4 Complete Table B, including chlorine.
in the treatment
process, or otherwise have
Complete Table B, omitting chlorine.
1 No 4
3.15
Have you completed
package?
monitoring for all applicable Table B pollutants and attached the results to this application
❑ No
1 Yes
3.16
Does one or more
• The facility
• The POTW
• The NPDES
sample other
each of its
Yes
of the following conditions apply?
has a design flow greater than or equal to 1 mgd.
has an approved pretreatment program or is required to develop such a program.
permitting authority has informed the POTW that it must sample for the parameters in Table C, must
additional parameters (Table D), or submit the results of WET tests for acute or chronic toxicity for
discharge outfalls (Table E).
4 Complete Tables C, D, and E as
applicable. ❑ No 3 SKIP to Section 4.
✓
3.17
Have you completed
package?
monitoring for all applicable Table C pollutants and attached the results to this application
❑ No
✓ Yes
3.18
Have you completed
attached the results
monitoring for all applicable Table D pollutants required by your NPDES permitting authority and
to this application package?
No additional sampling required by NPDES
❑ permitting authority.
✓ Yes
EPA Form 3510-2A (Revised 3-19)
Page 8

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
Effluent Testing Data Continued
3.19
Has the POTW
or (2) at least
conducted either (1) minimum of four quarterly WET tests for one year preceding this permit application
four annual WET tests in the past 4.5 years?
❑ No 4 Complete tests and Table E and SKIP to
Item 3.26.
✓ Yes
3.20
Have you previously submitted the results of the above tests
❑ Yes
to your NPDES permitting
No 4 Provide
authority?
results in Table E and SKIP to
✓
Item 3.26.
3.21
Indicate the dates the data were submitted to your NPDES permitting authority and provide a summary of the results.
Date(s) Submitted
(MM/DD/YYYY)
Summary of Results
3.22
Regardless of how you provided your WET testing data to the NPDES permitting authority, did any of the tests result in
toxicity?
❑ Yes ❑ No 4 SKIP to Item 3.26.
3.23
Describe the cause(s) of the toxicity:
3.24
Has the treatment works conducted a toxicity reduction evaluation?
❑ Yes ❑ No 4 SKIP to Item 3.26.
3.25
Provide details of any toxicity reduction evaluations conducted.
3.26
Have you completed
Table E for all applicable outfalls and attached the results to the application package?
❑ Not applicable because previously submitted
information to the NPDES permittin. authorit .
✓ Yes
Industrial Discharges and Hazardous Wastes
N 4. INDUSTRIAL
4.1
DISCHARGES
Does the POTW
AND HAZARDOUS WASTES (40 CFR 122.21(j)(6) and (7))
receive discharges from SIUs or NSCIUs?
❑ No 4 SKIP to Item 4.7.
1 Yes
4.2
Indicate the number of SIUs and NSCIUs that discharge to the POTW.
Number of SIUs
Number of NSCIUs
3
8
4.3
Does the POTW
have an approved pretreatment program?
❑ No
1 Yes
4.4
Have you submitted
identical to that
application or
either of the following to the NPDES permitting authority that contains information substantially
required in Table F: (1) a pretreatment program annual report submitted within one year of the
(2) a pretreatment program?
❑ No 4 SKIP to Item 4.6.
✓ Yes
4.5
Identify the title and date of the annual report or pretreatment program referenced in Item 4.4. SKIP to Item 4.7.
4.6
Have you completed
and attached Table F to this application package?
❑ No
✓ Yes
EPA Form 3510-2A (Revised 3-19)
Page 9

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
CSO Map and Diagram in Industrial Discharges and Hazardous Wastes Continued
4.7
Does the POTW receive, or has it been notified tha
regulated as RCRA hazardous wastes pursuant to
❑ Yes
it will receive, by truck, rail, or dedicated
40 CFR 261?
pipe, any wastes that are
4.9.
✓ No 4 SKIP to Item
4.8
If yes, provide the following information:
Hazardous Waste
Number
Waste Transport Method
(check all that apply)
Annual
Amount of
Waste
Received
Units
❑ Truck
❑ Dedicated pipe
❑ Rail
❑ Other (specify)
❑ Truck
❑ Dedicated pipe
❑ Rail
❑ Other (specify)
❑ Truck
❑ Dedicated pipe
❑ Rail
❑ Other (specify)
4.9
Does the POTW receive, or has it been notified that
including those undertaken pursuant to CERCLA and
❑ Yes
it will receive, wastewaters that originate
Sections 3004(7) or 3008(h) of RCRA?
from remedial activities,
5.
✓ No 4 SKIP to Section
4.10
Does the POTW receive (or expect to receive) less than 15 kilograms per month of non -acute hazardous wastes as
specified in 40 CFR 261.30(d) and 261.33(e)?
❑ Yes 4 SKIP to Section 5. ❑ No
4.11
Have you reported the following information in an attachment to this application: identification and description of the
site(s) or facility(ies) at which the wastewater originates; the identities of the wastewater's hazardous constituents; and
the extent of treatment, if any, the wastewater receives or will receive before entering the POTW?
❑ Yes ❑ No
N 5. COMBINED
SEWER OVERFLOWS (40 CFR 122.21(j)(8))
5.1
Does the treatment works have a combined sewer
❑ Yes
system?
6.
✓ No 4SKIP to Section
5.2
Have you attached a CSO system map to this application? (See instructions for map requirements.)
❑ Yes ❑ No
5.3
Have you attached a CSO system diagram to this application? (See instructions for diagram requirements.)
❑ Yes ❑ No
EPA Form 3510-2A (Revised 3-19)
Page 10

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
CSO Outfall Description
5.4
For each CSO outfall, provide the following information. (Attach additional sheets as necessary.)
CSO Outfall Number
CSO Outfall Number
CSO Outfall Number
City or town
State and ZIP code
County
Latitude
°
Longitude
"
Distance from shore
ft.
ft.
ft.
Depth below surface
ft.
ft.
ft.
CSO Monitoring
5.5
Did the POTW monitor any of the following items in the past year for its CSO outfalls?
CSO Outfall Number
CSO Outfall Number
CSO Outfall Number
Rainfall
• Yes • No
• Yes • No
• Yes • No
CSO flow volume
• Yes • No
• Yes • No
• Yes • No
CSO pollutant
concentrations
• Yes • No
• Yes • No
• Yes • No
Receiving water quality
• Yes • No
• Yes • No
• Yes • No
CSO frequency
• Yes • No
• Yes • No
• Yes • No
Number of storm events
• Yes • No
• Yes • No
• Yes • No
CSO Events in Past Year
5.6
Provide the following information for each of your CSO outfalls.
CSO Outfall Number
CSO Outfall Number
CSO Outfall Number
Number of CSO events in
the past year
events
events
events
Average duration per
event
hours
❑ Actual or ❑ Estimated
hours
❑ Actual or ❑ Estimated
hours
❑ Actual or ❑ Estimated
Average volume per event
million gallons
❑ Actual or ❑ Estimated
million gallons
❑ Actual or ❑ Estimated
million gallons
❑ Actual or ❑ Estimated
Minimum rainfall causing
a CSO event in last year
inches of rainfall
❑ Actual or ❑ Estimated
inches of rainfall
❑ Actual or ❑ Estimated
inches of rainfall
❑ Actual or ❑ Estimated
EPA Form 3510-2A (Revised 3-19)
Page 11

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
CSO Receiving Waters
5.7
N 6. CHECKLIST
Provide the information in the table below for each of your CSO outfalls.
CSO Outfall Number
CSO Outfall Number
CSO Outfall Number
Receiving water name
Name of watershed/
stream system
U.S. Soil Conservation
Service 14-digit
watershed code
(if known)
■
Unknown
• Unknown
• Unknown
Name of state
management/river basin
U.S. Geological Survey
8-Digit Hydrologic Unit
Code (if known)
0 Unknown
0 Unknown
• Unknown
Description of
water quality impacts
receiving stream
(see instructions
exam•les
AND
known
on
by CSO
for
CERTIFICATION
mark the
specify in Column
are required to
STATEMENT (40 CFR 122.22(a)
sections of Form 2A that you
2 any attachments that you
provide attachments.
and (d))
have completed and are submitting
are enclosing to alert the permitting
with your application. For
authority. Note that not
Checklist and Certification Statement
6.1
In Column 1 below,
each section,
all applicants
Column 1
Column 2
Section
1: Basic Application
for All Applicants
❑ w/ variance request(s) ❑ w/ additional attachments
Information
Section
2: Additional
1 w/ topographic
map
attachments
1
w/ process flow diagram
✓
❑ w/ additional
Information
3: Information on
Discharges
✓ w/ Table
A
B
C
1
w/ Table D
Section
✓
1 w/ Table
1
w/ Table E
Effluent
❑ w/ additional attachments
1 w/ Table
Section
4: Industrial
and Hazardous
1 w/ SIU
and NSCiU attachments
attachments
✓
w/ Table F
1 Discharges
❑ w/ additional
Wastes
❑ Section 5: Combined Sewer
Overflows
❑ w/ CSO map ❑ w/ additional attachments
❑ w/ CSO system diagram
Section
6: Checklist and
Statement
❑ w/ attachments
✓
Certification
6.2
Certification Statement
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible
for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations.
Name (print or type first and last name)
Victor Czar
Official title
Public Works Director
Signature
Date signed
EPA Form 3510-2A (Revised 3-19)
Page 12

EPA Identification Number
NPDES Permit Number
Facility Name
Outfall Number
110007670332
NC0024147
Big Buffalo WWTP
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE A. EFFLUENT PARAMETERS
Pollutant
FOR ALL POTWS
Maximum Daily
Discharge
Average Daily Discharge
Analytical
Methods
Methods(
ML or MDL
include units )
Value
Units
Value
Units
Number of
Samples
Biochemical oxygen demand
❑ BOD5 or o CBOD5
(report one)
25.00
mg/L
2.48
mg/L
598
o ML
SM 5210B 2 mg/L 0 MDL
Fecal coliform
2420.00
MPN/100mL
44.16
MPN/100mL
594
SM 9222D PN/100mL El ML
0 MDL
Design flow rate
29.90
mgd
5.338
mgd
1,645
ill
pH (minimum)
5.40
s.0
pH (maximum)
7.30
s.0
Temperature (winter)
22.00
°C
15.79
°C
439
Temperature (summer)
28.00
°C
23.70
°C
682
Total suspended solids (TSS)
120.00
mg/L
3.02
mg/L
595
SM 2540D 2.5 mg/L 0 ML
O MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A (Revised 3-19)
Page 13

This page intentionally left blank.

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
0utfall Number
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE B. EFFLUENT PARAMETERS
Pollutant
FOR ALL POTWS WITH A FLOW EQUAL
Maximum Daily Discharge
TO OR GREATER THAN 0.1 MGD
Average Daily Discharge
Analytical
Methods
ML or MDL
(include
units)
Value
Units
Value
Units
Number of
Samples
Ammonia (as N)
6.70
mg/L
0.78
mg/L
1,007
SM 4500NH3
0 ML
< 1 mg/L 0 MDL
Chlorine
(total residual, TRC)2
NA
NA
NA
NA
NA
NA
❑ ML
NA ❑ MDL
Dissolved oxygen
5.60
mg/L
8.49
mg/L
1,113
SM 45000G
0 ML
< 0.5 mg/L 0 MDL
Nitrate/nitrite
14.96
mg/L
3.34
mg/L
239
EPA 300
0 ML
< 0.1 mg/L 0 MDL
Kjeldahl nitrogen
16.30
mg/L
1.49
mg/L
240
SM 4500NH3
0 ML
< 1 mg/L 0 MDL
Oil and grease
<5.0
mg/L
<5.0
mg/L
59
EPA 1664A
0 ML
< 5 mg/L 0 MDL
Phosphorus
6.70
mg/L
1.60
mg/L
246
EPA 365.2
0 ML
< 0.5 mg/L 2 MDL
Total dissolved solids
439.00
mg/L
340.25
mg/L
4
SM 2540C
0 ML
< 10 mg/1 l7 MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
2 Facilities that do not use chlorine for disinfection, do not use chlorine elsewhere in the treatment process, and have no reasonable potential to discharge chlorine in their effluent are not
required to report data for chlorine.
EPA Form 3510-2A (Revised 3-19)
Page 15

This page intentionally left blank.

TABLE
EPA Identification Number
110007670332
C. EFFLUENT PARAMETERS
NPDES Permit Number
NC0024147
FOR SELECTED POTWS
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
Average
Outfall Number
001
Daily Discharge
Analytical
Method1
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
Value
Units
Value
Units
Number of
Samples
Metals, Cyanide, and Total Phenols
Hardness (as CaCO3)
100
mg/L
66.93
mg/L
58
SM 2340-C
0 ML
1.0 mg/L 0 MDL
Antimony, total recoverable
0.0125
mg/L
0.0125
mg/L
4
200.7
ML
0.025 mg/L 0 MDL
Arsenic, total recoverable
0.0050
mg/L
0.0016
mg/L
59
200.7/200.8
ML
0.003 mg/L 0 MDL
Beryllium, total recoverable
0.0025
mg/L
0.0025
mg/L
4
200.7
0 ML
0.005mg/L 0 MDL
Cadmium, total recoverable
0.0010
mg/L
0.0003
mg/L
59
200.7/200.8
ML
0.0005 mg/L 0 MDL
Chromium, total recoverable
0.0060
mg/L
0.0027
mg/L
59
200.7/200.8
0 ML
0.005 mg/L 0 MDL
Copper, total recoverable
0.0060
mg/L
0.0027
mg/L
59
200.7/200.8
ML
0.002 mg/L 0 MDL
Lead, total recoverable
0.0050
mg/L
0.0013
mg/L
59
200.7/200.8
ML
0.002 mg/L 0 MDL
Mercury, total recoverable
4.70E-06
mg/L
9.04E-07
mg/L
25
1631
0 ML
1.0 ng/L 0 MDL
Nickel, total recoverable
0.0140
mg/L
0.0074
mg/L
59
200.7/200.8
ML
0.005 mg/L 0 MDL
Selenium, total recoverable
0.0050
mg/L
0.0018
mg/L
59
200.7/200.8
0 ML
0.003 mg/L 0 MDL
Silver, total recoverable
0.0025
mg/L
0.0007
mg/L
59
200.7/200.8
0 ML
0.001 mg/L 0 MDL
Thallium, total recoverable
0.0100
mg/L
0.0100
mg/L
4
200.7
0.02mg/L ❑ ML
E MDL
Zinc, total recoverable
0.0740
mg/L
g
0.0460
mg/L
g
59
200.7/200.8
0.01 mg/L ML
0 MDL
Cyanide
0.0025
mg/L
0.0025
mg/L
58
335.4
0.005 mg/L ML
0 MDL
Total phenolic compounds
0.032
mg/L
0.0145
mg/L
4
420.1
0.01 mg/L D ML
0 MDL
Volatile Organic Compounds
Acrolein
25
µg/L
25
µg/L
4
EPA 624
0 ML
50 µg/L 0 MDL
Acrylonitrile
5
µg/L
5
µg/L
4
EPA 624
0 ML
10 p.g/L 0 MDL
Benzene
0.5
µg/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
Bromoform
0.5
µg/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
EPA Form 3510-2A (Revised 3-19)
*MDL was reported for Analytical Method 200.8 or as applicable.
Page 17

TABLE
EPA Identification Number
110007670332
C. EFFLUENT PARAMETERS
NPDES Permit Number
NC0024147
FOR SELECTED POTWS
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
Average
Outfall Number
001
Daily Discharge
Analytical
Method1
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
Value
Units
Value
Units
Number of
Samples
Carbon tetrachloride
0.5
µg/L
0.5
µg/L
4
EPA 624
1 p.g/L❑ ML
O MDL
Chlorobenzene
0.5
µg/L
0.5
µg/L
4
EPA 624
1 /L ❑ ML
µg 0 MDL
Chlorodibromomethane
0.5
µg/L
0.5
µg/L
4
EPA 624
0 ML
1 p.g/L 0 MDL
Chloroethane
2.5
µg/L
2.5
µg/L
4
EPA 624
5 µg/L 0 ML
O MDL
2-chloroethylvinyl ether
2.5
µg/L
2.5
µg/L
4
EPA 624
5 µg/L 0 ML
0 MDL
Chloroform
0.5
µg/L
0.5
µg/L
4
EPA 624
1 /L 0 ML
µg 0 MDL
Dichlorobromomethane
0.5
p.g/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
0 MDL
1,1-dichloroethane
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
1,2-dichloroethane
0.5
µg/L
0.5
µg/L
4
EPA 624
1 /L 0 ML
µg 0 MDL
trans-1,2-dichloroethylene
0.5
µg/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
1,1-dichloroethylene
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
1,2-dichloropropane
0.5
p.g/L
0.5
µ
4
EPA 624
1 µg/L 0 ML
0g/L MDL
1,3-dichloropropylene
0.5
µg/L
0.5
p.g/L
4
EPA 624
0 ML
1 µg/L 0 MDL
Ethylbenzene
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
Methyl bromide
2.5
µg/L
2.5
µg/L
4
EPA 624
5 µg/L 0 ML
0 MDL
Methyl chloride
2.5
µg/L
2.5
µg/L
4
EPA 624
5 µg/L 0 ML
O MDL
Methylene chloride
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
1,1,2,2-tetrachloroethane
0.5
µg/L
0.5
µg/L
4
EPA 624
1 p.g/L 0 ML
MDL
Tetrachloroethylene
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
Toluene
0.5
p.g/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
1,1,1-trichloroethane
0.5
µg/L
0.5
µg/L
4
EPA 624
1 µg/L 0 ML
O MDL
1,1,2-trichloroethane
0.5
p.g/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
EPA Form 3510-2A (Revised 3-19)
Page 18

TABLE
EPA Identification Number
110007670332
C. EFFLUENT PARAMETERS
NPDES Permit Number
NC0024147
FOR SELECTED POTWS
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
Average
Outfall Number
001
Daily Discharge
Analytical
Method1
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
Value
Units
Value
Units
Number of
Samples
Trichloroethylene
0.5
µg/L
0.5
µg/L
4
EPA 624
0 ML
1 µg/L 0 MDL
Vinyl chloride
2.5
µg/L
2.5
µg/L
4
EPA 624
0 ML
5 µg/L 0 MDL
Acid -Extractable Compounds
p-chloro-m-cresol
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L l7 MDL
2-chlorophenol
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L 0 ML
O MDL
2,4-dichlorophenol
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
2,4-dimethylphenol
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L t ML
O MDL
4,6-dinitro-o-cresol
25
µg/L
25
µg/L
4
EPA 625
0 ML
50 µg/L l7 MDL
2,4-dinitrophenol
25
µg/L
25
µg/L
4
EPA 625
50 µg/L LI ML
0MDL
2-nitrophenol
5.0
µg/L
5.0
µg/L
4
EPA 625
0
10 µg/L ML
O MDL
4-nitrophenol
25
µg/L
25
µg/L
4
EPA 625
50 µg/L ML
0MDL
Pentachlorophenol
25
µg/L
25
µg/L
4
EPA 625
50 µg/L 0 ML
O MDL
Phenol
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
2,4,6-trichlorophenol
5.0
µg/L
5.0
µg/L
4
EPA 625
10 MA0 ML
0 MDL
Base -Neutral Compounds
Acenaphthene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L 2 ML
O MDL
Acenaphthylene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 /L 0 ML
µg l7 MDL
Anthracene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L l7 MDL
Benzidine
25
µg/L
25
µg/L
4
EPA 625
0 ML
50 µg/L 0 MDL
Benzo(a)anthracene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L l7 MDL
Benzo(a)pyrene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
3,4-benzofluoranthene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
EPA Form 3510-2A (Revised 3-19)
Page 19

TABLE
EPA Identification Number
110007670332
C. EFFLUENT PARAMETERS
NPDES Permit Number
NC0024147
FOR SELECTED POTWS
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
Average
Outfall Number
001
Daily Discharge
Analytical
Method1
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
Value
Units
Value
Units
Number of
Samples
Benzo(ghi)perylene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
O MDL
Benzo(k)fluoranthene
5.0
µ
5.0
µg/L
4
EPA 625
10 /L ❑ ML
µgg/L 0 MDL
Bis (2-chloroethoxy) methane
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Bis (2-chloroethyl) ether
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Bis (2-chloroisopropyl) ether
5.0
µg/L
5.0
µ
4
EPA 625
10 /L 0 ML
µg 0g/L MDL
Bis (2-ethylhexyl) phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg /L 0 ML
0 MDL
4-bromophenyl phenyl ether
5.0
µg/L
5.0
µ
4
EPA 625
10 /L 0 ML
MA 0 MDL
Butyl benzyl phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
2-chloronaphthalene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
4-chlorophenyl phenyl ether
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
l7 MDL
Chrysene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
di-n-butyl phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
l7 MDL
di-n-octyl phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Dibenzo(a,h)anthracene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
1,2-dichlorobenzene
5.0
µ
5.0
µg/L
4
EPA 625
10 /L ❑ ML
MA 0 MDL
1,3-dichlorobenzene
5.0
µg/L
5.0
µg/L
4
EPA 625
g/L 0 ML
10 µO MDL
1,4-dichlorobenzene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 /L 0 ML
µg 0 MDL
3,3-dichlorobenzidine
25.0
µg/L
25
µg/L
4
EPA 625
50 µ0g/L 0 ML
MDL
Diethyl phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Dimethyl phthalate
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µ0g/L ML
MDL
2,4-dinitrotoluene
5.0
p.g/LMA
5.0
µg/L
4
EPA 625
10 /L ML
0 MDL
2,6-dinitrotoluene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 /L 0 ML
µg 0 MDL
EPA Form 3510-2A (Revised 3-19)
Page 20

TABLE
EPA Identification Number
110007670332
C. EFFLUENT PARAMETERS
NPDES Permit Number
NC0024147
FOR SELECTED POTWS
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
Average
Outfall Number
001
Daily Discharge
Analytical
Method1
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
Value
Units
Value
Units
Number of
Samples
1,2-diphenylhydrazine
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Fluoranthene
5.0
µg/L
5.0
µ
4
EPA 625
10 g/L ❑ ML
µg/L 0 MDL
Fluorene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Hexachlorobenzene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Hexachlorobutadiene
5.0
µ
5.0
µg/L
4
EPA 625
10 /L ❑ ML
µgg/L 0 MDL
Hexachlorocyclo-pentadiene
25
µg/L
25
µg/L
4
EPA 625
0 ML
50 µg/L 0 MDL
Hexachloroethane
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Indeno(1,2,3-cd)pyrene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
O MDL
Isophorone
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Naphthalene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
0 MDL
Nitrobenzene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
N-nitrosodi-n-propylamine
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
N-nitrosodimethylamine
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
0 MDL
N-nitrosodiphenylamine
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
Phenanthrene
5.0
µg/L
5.0
µg/L
4
EPA 625
10 µg/L ❑ ML
0 MDL
Pyrene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L 0 MDL
1,2,4-trichlorobenzene
5.0
µg/L
5.0
µg/L
4
EPA 625
0 ML
10 µg/L O MDL
1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR Chapter I, Subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A (Revised 3-19)
Page 21

This page intentionally left blank.

EPA Identification Number
110007670332
TABLE D. ADDITIONAL POLLUTANTS
NPDES Permit Number
NC0024147
AS REQUIRED BY NPDES PERMITTING
Maximum Daily Discharge
Facility Name
Big Buffalo WWTP
AUTHORITY
Average
Outfall Number
001
Daily Dischar e
Analytical
Method
Form Approved 03/05/19
OMB No. 2040-0004
ML or MDL
(include units)
Pollutant
list
(list)
Value
Units
Value
Units Number of
Samples
•
No additional sampling is required by NPDES permitting authority.
1,4 - Dioxane
2.43
µg/L
1.34
µg/L
7
624.1
1.0 µg/L 2 MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
E ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
❑ ML
❑ MDL
1Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required
under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2A (Revised 3-19)
Page 23

This page intentionally left blank.

EPA Identification Number
110007670332
TABLE E. EFFLUENT MONITORING
The table provides response space
NPDES Permit Number
NC0024147
FOR WHOLE EFFLUENT TOXICITY
for one whole effluent toxicity sample.
Facility Name
Big Buffalo WWTP
Copy the table to report additional
Outfall Number
001
test results.
Form Approved 03/05/19
OMB No. 2040-0004
Test Information
Test Number
01
Test
Number 02
Test Number 133
Test species
Ceriodaphnia dubia
Ceriodaphnia dubia
Ceriodaphnia dubia
Age at initiation of test
<24 Hours
<24 Hours
<24 Hours
Outfall number
001
001
001
Date sample collected
09/18/2017
06/11/2018
03/11/2019
Date test started
09/19/2017
06/12/2018
03/12/2019
Duration
7 days
7 days
7 days
Toxicity Test Methods
Test method number
EPA 1002.0
EPA 1002.0
EPA 1002.0
Manual title
ort-Term Methods for Es[imaringthe Chronic Toxici of Effluents and Recieving Water to
Freshwater Organisms
hort-Term Methods for Estima[ingthe Chronic Toxicity of Effluents and Recieving Waterto
Freshwater Organisms
ort-Term Methods for Es[imatingthe Chronic Toxici of Effluents and Recieving Water to
Freshwater Organisms
Edition number and year of publication
4th Edition, 2002
4th Edition, 2002
4th Edition, 2002
Page number(s)
pp. 53-111
pp. 53-111
pp. 53-111
Sample Type
Check one:
❑ Grab
❑ Grab
composite
❑ Grab
24-hour composite
' 24-hour
'
24-hour composite
Sample Location
Check one:
❑ Before Disinfection
❑ Before Disinfection
❑ Before disinfection
' After Disinfection
' After Disinfection
'
After disinfection
❑ After Dechlorination
❑ After Dechlorination
❑ After dechlorination
Point in Treatment Process
Describe the point in the treatment process
at which the sample was collected for each
test.
Final Effluent
Final Effluent
Final Effluent
Toxicity Type
Indicate for each test whether the test was
performed to asses acute or chronic toxicity,
or both. (Check one response.)
❑ Acute
❑ Acute
❑ Acute
Chronic
'Chronic
'Chronic
❑ Both
❑ Both
❑ Both
EPA Form 3510-2A (Revised 3-19)
Page 25

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Outfall Number
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample. Copy the table to report additional test results.
Test Number
01
Test Number
02
Test Number
03
Test Type
Indicate the type of test performed. (Check one
response.)
❑ Static
❑ Static
❑ Static
1 Static -renewal
✓ Static -renewal
1
Static -renewal
❑ Flow -through
❑ Flow -through
❑ Flow -through
Source of Dilution Water
Indicate the source of dilution water. (Check
one response.)
1 Laboratory water
1 Laboratory
water
water
✓
Laboratory water
❑ Receiving water
❑ Receiving
❑ Receiving water
If laboratory water, specify type.
Soft Synthetic Freshwater
Soft Synthetic Freshwater
Soft Synthetic Freshwater
If receiving water, specify source.
Type of Dilution Water
Indicate the type of dilution water. If salt
water, specify "natural" or type of artificial
sea salts or brine used.
1 Fresh water
✓ Fresh water
(specify)
1
Fresh water
❑ Salt water (specify)
❑ Salt water
❑ Salt water (specify)
Percentage Effluent Used
Specify the percentage effluent used for all
concentrations in the test series.
0, 11.25, 22.5, 45, 67.5, 90%
0, 11.25, 22.5, 45, 67.5,
90%
0, 9.75, 19.5, 39, 78,
100%
Parameters Tested
Check the parameters tested.
✓ pH
❑ Ammonia
1 pH
❑ Ammonia
oxygen
1
pH
❑ Ammonia
oxygen
❑ Salinity
❑ Salinity
Q Temperature
❑ Salinity
MI
Dissolved oxygen
511 Dissolved
MI Dissolved
MI Temperature
MI
Temperature
Acute Test Results
Percent survival in 100% effluent
N/A
%
N/A %
N/A
LCso
N/A
N/A
N/A
95% confidence interval
N/A
%
N/A %
N/A %
Control percent survival
N/A
%
N/A %
N/A %
EPA Form 3510-2A (Revised 3-19)
Page 26

EPA Identification Number
110007670332
TABLE E. EFFLUENT MONITORING
The table provides response space
NPDES Permit Number
NC0024147
FOR WHOLE EFFLUENT TOXICITY
for one whole effluent toxicity sample.
Facility Name
Big Buffalo WWTP
Copy the table to report additional
Outfall Number
001
test results.
Form Approved 03/05/19
OMB No. 2040-0004
Test Number 01
Test Number 02
Test Number 03
Acute Test Results Continued
Other (describe)
N/A
N/A
N/A
Chronic Test Results
NOEC
90 %
90 %
100 %
IC25
N/A %
N/A %
N/A %
Control percent survival
82.5 %
100 %
100 %
Other (describe)
N/A
N/A
Quality Control/Quality Assurance
Is reference toxicant data available?
✓
Yes
❑ No
1
Yes
❑ No
1
Yes
❑ No
Was reference toxicant test within
acceptable bounds?
1
Yes
❑ No
Yes
❑ No
Yes
❑ No
What date was reference toxicant test run
(MM/DD/YYYY)?
09/20/2017
06/13/2018
03/13/2019
Other (describe)
N/A
N/A
N/A
EPA Form 3510-2A (Revised 3-19)
Page 27

This page intentionally left blank.

EPA Identification Number
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Outfall Number
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample. Copy the table to report additional test results.
Test Information
Test Number
04
Test
Number 05
Test Number NA
Test species
Ceriodaphnia dubia
Ceriodaphnia dubia
NA
Age at initiation of test
<24 Hours
<24 Hours
NA
Outfall number
001
001
NA
Date sample collected
12/14/2020
09/20/2021
Date test started
12/15/2020
09/21/2021
Duration
7 days
7 days
NA
Toxicity Test Methods
Test method number
EPA 1002.0
EPA 1002.0
NA
Manual title
ort-Term Methods forEs[imatingtheChronlcToxici of Effluents andRecievingWater[o
Freshwater Organisms
hort-Term Methods forestima[ingtheChronicToxicityofEffluentsandRecievingWaterto
Freshwater Organisms
NA
Edition number and year of publication
4th Edition, 2002
4th Edition, 2002
NA
Page number(s)
pp. 53-111
pp. 53-111
NA
Sample Type
Check one:
❑ Grab
❑ Grab
composite
❑ Grab
❑ 24-hour composite
24-hour composite
l 24-hour
Sample Location
Check one:
❑ Before Disinfection
❑ Before Disinfection
❑ Before disinfection
❑ After disinfection
❑ After dechlorination
After Disinfection
After Disinfection
❑ After Dechlorination
❑ After Dechlorination
Point in Treatment Process
Describe the point in the treatment process
at which the sample was collected for each
test.
Final Effluent
Final Effluent
NA
Toxicity Type
Indicate for each test whether the test was
performed to asses acute or chronic toxicity,
or both. (Check one response.)
❑ Acute
❑ Acute
❑ Acute
Chronic
❑ Both
Chronic
'Chronic
❑ Both
❑ Both
EPA Form 3510-2A (Revised 3-19)
Page 25

EPA Identification Number
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
0utfall Number
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample. Copy the table to report additional test results.
Test Number
04
Test Number
05
Test Number
N/A
Test Type
Indicate the type of test performed. (Check one
response.)
❑ Static
❑ Static
❑ Static
❑ Static -renewal
❑ Flow -through
✓ Static -renewal
✓ Static -renewal
❑ Flow -through
❑ Flow -through
Source of Dilution Water
Indicate the source of dilution water. (Check
one response.)
1 Laboratory water
✓ Laboratory
water
water
❑ Laboratory water
❑ Receiving water
❑ Receiving water
❑ Receiving
If laboratory water, specify type.
Soft Synthetic Freshwater
Soft Synthetic Freshwater
NA
If receiving water, specify source.
Type of Dilution Water
Indicate the type of dilution water. If salt
water, specify "natural" or type of artificial
sea salts or brine used.
✓ Fresh water
✓ Fresh water
(specify)
❑ Fresh water
❑ Salt water (specify)
❑ Salt water (specify)
❑ Salt water
Percentage Effluent Used
Specify the percentage effluent used for all
concentrations in the test series.
o, 11.25, 22.5, 45, 67.5, 90%0,
11.25, 22.5, 45, 67.5,
90%
NA
Parameters Tested
Check the parameters tested.
✓ pH
❑ Ammonia
✓ pH
❑ Ammonia
oxygen
❑ pH
❑ Salinity
❑ Temperature
❑ Ammonia
❑ Dissolved oxygen
❑ Salinity
❑ Salinity
Q Temperature
5J
Dissolved oxygen
rJ Dissolved
CA Temperature
Acute Test Results
Percent survival in 100% effluent
N/A
%
N/A
%
NA %
LCso
N/A
N/A
NA
95% confidence interval
N/A
%
N/A
%
NA %
Control percent survival
N/A
%
N/A
%
NA %
EPA Form 3510-2A (Revised 3-19)
Page 26

EPA Identification Number
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
0utfall Number
001
Form Approved 03/05/19
OMB No. 2040-0004
TABLE E. EFFLUENT MONITORING FOR WHOLE EFFLUENT TOXICITY
The table provides response space for one whole effluent toxicity sample. Copy the table to report additional test results.
Test Number 04
Test Number 05
Test Number N/A
Acute Test Results Continued
Other (describe)
N/A
N/A
NA
Chronic Test Results
NOEC
90 %
90 %
NA
IC25
N/A %
N/A %
NA %
Control percent survival
100 %
100 %
NA %
Other (describe)
N/A
N/A
NA
Quality Control/Quality Assurance
Is reference toxicant data available?
✓
Yes
❑ No
1
Yes
❑ No
❑ Yes
❑ No
Was reference toxicant test within
acceptable bounds?
1
Yes
❑ No
Yes
❑ No
❑ Yes
❑ No
What date was reference toxicant test run
(MM/DD/YYYY)?
12/16/2020
09/22/2021
Other (describe)
N/A
N/A
NA
EPA Form 3510-2A (Revised 3-19)
Page 27

This page intentionally left blank.

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 01
SIU 02
SIU 03
Name of SIU
Arauco
Caterpillar Boone Trail
Caterpillar Womack
Mailing address (street or P.O. box)
985 Corinth Rd
2018 Boone Trail Rd
5000 Womack Rd
City, state, and ZIP code
Moncure, NC 27559
Sanford, NC 27330
Sanford, NC 27330
Description of all industrial processes that affect
or contribute to the discharge.
Use of hardwood chips and sawdust,
softwood chips and sawdust, urea
formaldehyde resin, wax, and potassium
hydroxide solution to form composite panels
Paint system prewash of metal parts.
Steam boiler blow down, air compressor
receiver tank condensate, air dryer
condensate, laboratory sink, and process
wastewater.
List the principal products and raw materials that
affect or contribute to the SIU's discharge.
Principal Products: Composite panels
including MDF, particleboard and HDF.
Raw Materials: Hardwood chips and sawdust,
softwood chips, urea formaldehyde resin,
wax, potassium hydroxide solution.
Principal Products: Electro-deposition &
(top coat) wet paint miscellaneous metal
parts
Raw materials: Electro-deposition coating,
wet paint, aqueous cleaners, zinc
phosphate, sealer, acids, caustics .
NA
Indicate the average daily volume of wastewater
discharged by the SIU.
150,00o gpd
27,000 gpd
37,300 gpd
How much of the average daily volume is
attributable to process flow?
150,00o gpd
27,000 gpd
37,300 gpd
How much of the average daily volume is
attributable to non -process flow?
NA gpd
NA gpd
NA gpd
Is the SIU subject to local limits?
Yes ❑ No
Yes ❑ No
J Yes ❑ No
Is the SIU subject to categorical standards?
✓ Yes ❑ No
1 Yes ❑ No
1 Yes ❑ No
EPA Form 3510-2A (Revised 3-19)
Page 29

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 01
SIU 02
SIU o3
Under what categories and subcategories is the
SIU subject?
Timber Products Processing Point Source /
429
Metal Finishing - Coatings / 433
Metal Finishing - Coatings / 433
Has the POTW experienced problems (e.g.,
upsets, pass -through interferences) in the past 4.5
years that are attributable to the SIU?
❑ Yes ' No
❑ Yes
'
No
❑ Yes
'
No
If yes, describe.
NA
NA
NA
Click to go back to the beginning of Form
EPA Form 3510-2A (Revised 3-19)
Page 30

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 04
SIU 05
SIU 06
Name of SIU
Charah
Coty
Hydro Tube
Mailing address (street or P.O. box)
1604 Colon Road
1400 Broadway Road
2645 Mt. Pisgah Church Road
City, state, and ZIP code
Sanford, NC 27332
Sanford, NC 27332
Sanford, NC 27332
Description of all industrial processes that affect
or contribute to the discharge.
Coal ash leachate from permanent disposal
site
Fragrances and Bath & Body Preparations
Sawing, Bending, Drilling, and Powder
Coating for Metal Tubing Fabrications
List the principal products and raw materials that
affect or contribute to the SIU's discharge.
Principal Products: Coal combustion
by-products including run-off via rainfall
Raw Material: Coal Ash
Principal Products: Shampoos, Gels,
Lotions, Creams, Powders, and Fragrances
Raw Materials: Ethanol, Surfactants,
Stabilizers, preservatives and FDC color
solutions.
Principal Products: Metal Tube
Assemblies and Coating
Raw Materials: Carbon Steel and Stainless
Steel
Indicate the average daily volume of wastewater
discharged by the SIU.
29,500 gpd
66,098 gpd
7,500 gpd
How much of the average daily volume is
attributable to process flow?
29,500 gpd
27,641 gpd
4,200 gpd
How much of the average daily volume is
attributable to non -process flow?
NA gpd
38,457 gpd
3,300 gpd
Is the SIU subject to local limits?
' Yes ❑ No
' Yes ❑ No
' Yes ❑ No
Is the SIU subject to categorical standards?
❑ Yes ' No
❑ Yes ' No
' Yes ❑ No
EPA Form 3510-2A (Revised 3-19)
Page 29

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 04
SIU 05
SIU 06
Under what categories and subcategories is the
SIU subject?
NA
NA
Metal Finishing - Coatings / 433
Has the POTW experienced problems (e.g.,
upsets, pass -through interferences) in the past 4.5
years that are attributable to the SIU?
❑ Yes ' No
❑ Yes
'
No
❑ Yes
'
No
If yes, describe.
NA
NA
NA
Click to go back to the beginning of Form
EPA Form 3510-2A (Revised 3-19)
Page 30

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 07
SIU 08
SIU 09
Name of SIU
Moen
Pfizer
STI Polymer
Mailing address (street or P.O. box)
2609 Cox Mill Road
4300 Oak Park
5618 Clyde Rhyne Dr
City, state, and ZIP code
Sanford, NC 27330
Sanford, NC 27330
Sanford, NC 27330
Description of all industrial processes that affect
or contribute to the discharge.
Metal cutting, buffing, chrome plating, alloy
plating, vibratory finishing, physical vapor
deposition, stamping, powder coating and
plastic molding
Vaccine manufacturing and development
Manufacture of synthetic resins and
adhesives
List the principal products and raw materials that
affect or contribute to the SIU's discharge.
Principal Products: Household faucet
components
Raw Materials: Nickel, Resin, Aluminum,
Plastic, and Copper
Principal Products: HIBBTITER Vaccine, Prevnar Vaccine,
Meningitec Vaccine, CRM 197 (Carrier Protein)
Raw Materials: Sodium Phosphate, Amino Acids, Sodium
Chloride,Caustics, Ammonium Sulfide, Ethyl Alcohol, Sucrose,
Calcium Chloride, Phosphoric Acid, Sulfuric Acid
Principal Products: Polymers for paints
and adhesives
Raw Materials: Acrylic, vinyl acrylic,
acrylic/acrylonitrile, and styrene acrylic
polymer
Indicate the average daily volume of wastewater
discharged by the SIU.
294,000 gpd
422,610 gpd
25,000 gpd
How much of the average daily volume is
attributable to process flow?
252,013 gpd
403,922 gpd
24,950 gpd
How much of the average daily volume is
attributable to non -process flow?
41,987 gpd
18,688 gpd
5o gpd
Is the SIU subject to local limits?
Yes ❑ No
Yes ❑ No
J Yes ❑ No
Is the SIU subject to categorical standards?
✓ Yes ❑ No
1 Yes ❑ No
1 Yes ❑ No
EPA Form 3510-2A (Revised 3-19)
Page 29

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 07
SIU 08
SIU 09
Under what categories and subcategories is the
SIU subject?
Metal Finishing - Coatings / 433
Pharmaceutical subpart - Fermentation /
439
Organic Chemicals, Plastics, and Synthetic
Fibers --- Subpart K indirect discharge
point source / 414
Has the POTW experienced problems (e.g.,
upsets, pass -through interferences) in the past 4.5
years that are attributable to the SIU?
❑ Yes ' No
❑ Yes
'
No
❑ Yes
'
No
If yes, describe.
NA
NA
NA
Click to go back to the beginning of Form
EPA Form 3510-2A (Revised 3-19)
Page 30

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 10
SIU 11
SIU NA
Name of SIU
Trion
Tyson
NA
Mailing address (street or P.O. box)
101 McNeill Rd.
800 E Main St
NA
City, state, and ZIP code
Sanford, NC 27330
Sanford, NC 27332
NA
Description of all industrial processes that affect
or contribute to the discharge.
Manufacture of air cleaners, fan filter units,
air diffusers, humidifiers, and medical
products, (shearing, cutting, forming,
welding, painting , and assembly of metal
parts)
Process wash down water (bakery -flour &
corn products by mixing, forming, baking,
frying, cooling, and packaging), domestic,
cooling water.
NA
List the principal products and raw materials that
affect or contribute to the SIU's discharge.
Principal Products: Duct Mount Air Cleaners,
CIA Air Cleaners, Fan Filter Units, Air
Diffusers, and Humidifiers
Raw Materials: Sheet Metal, Cleaners, Paint,
Xylene
Principal Products: Tyson Mexican Original
Foods (Taco Shells and Tortillas)
Raw Materials: Flour, Corn Products etc.
NA
Indicate the average daily volume of wastewater
discharged by the SIU.
28,350 gpd
so,000 gpd
NA
gpd
How much of the average daily volume is
attributable to process flow?
16,200 gpd
so,000 gpd
NA
gpd
How much of the average daily volume is
attributable to non -process flow?
12,150 gpd
NA gpd
NA
gpd
Is the SIU subject to local limits?
❑ Yes
❑ No
Yes ❑ No
❑ Yes J No
Is the SIU subject to categorical standards?
❑ Yes
❑ No
✓ Yes ❑ No
❑ Yes 1 No
EPA Form 3510-2A (Revised 3-19)
Page 29

EPA Identification Number
110007670332
NPDES Permit Number
NC0024147
Facility Name
Big Buffalo WWTP
Form Approved 03/05/19
OMB No. 2040-0004
TABLE F. INDUSTRIAL DISCHARGE INFORMATION
Response space is provided for three SIUs. Copy the table to report information for additional SIUs.
SIU 10
SIU 11
SIU
Under what categories and subcategories is the
SIU subject?
Metal Finishing - Coatings / 433.15
NA
NA
Has the POTW experienced problems (e.g.,
upsets, pass -through interferences) in the past 4.5
years that are attributable to the SIU?
❑ Yes ' No
❑ Yes
'
No
❑ Yes ❑ No
If yes, describe.
NA
NA
NA
Click to go back to the beginning of Form
EPA Form 3510-2A (Revised 3-19)
Page 30

Tab B

Big Buffalo WWTP
Effluent Discharge 001
Lat: 35° 33' 03" N
Long: 79° 13' 29" W
(Lat: 35.55083)
(Long: -79.22472)
Big Buffalo WWTP Parcel Boundary
Big Buffalo WWTP Influent Piping
^e Big Buffalo WWTP Effluent Piping
SCALE
0 0.25 0.5
Miles
1 in = 0.5 miles
Hazen
Figure
Big
Outfall #001
City
1 - Location Map
Buffalo WWTP
and Receiving Stream
of Sanford, NC

BIG BUFFALO WWTP
PROCESS NARRATIVE
Influent Distribution Box:
The Big Buffalo WWTP influent from the Big Buffalo Interceptor and the Northview (Little
Buffalo) force main are combined at the plant influent distribution box. Filter backwash and
digester supernatant are also returned to the influent distribution box. A 48-inch sluice gate is
used to control flow from the Big Buffalo Interceptor into the plant, and four other sluice
gates are used to control wastewater flow to the two screening facilities.
Influent Screens:
Four influent screens are provided at the plant, each of which is a filter screen with a clear
opening of 0.25 inches. A manual bar screen is provided as a backup for the four influent
screens. The screens remove large solids and debris from the influent wastewater to protect
downstream equipment and treatment processes. Peak flow capacity of each influent screen is
13.5 mgd. The manual bar screen has a peak flow capacity of 36 mgd.
Influent Flow Measurement and Sampling:
An influent Parshall flume is used to measure the plant influent flow rate. The Parshall flume has
a throat width of 3 feet, and has a normal flow range of 0 to 40 mgd, corresponding to water
depths of 0 to 2.85 feet through the flume. An influent sample pump and sampler are used to
collect the influent sample for laboratory testing.
Grit Removal:
Two detritor-type grit collectors are provided for grit removal. The grit collectors are designed to
remove settleable grit, such as sand and gravel, which can damage downstream equipment and
accumulate in process tankage. Three recessed impeller -type grit pumps carry grit slurry
through three 4-inch pipes to three grit cyclone/classifier units located on the second floor of the
Grit Handling Building. One grit pump is used as a backup pump for both grit collectors. One grit
cyclone/classifier unit is a backup for the other two cyclone/classifiers. The dewatered grit is
discharged to a dumpster.
Water discharged from the cyclone/classifiers is combined in the Grit Handling Building and
discharged through nozzles to the influent "baffle well" of the New Influent Pump Station to
break up scum and floating material which accumulates in the baffle well. The discharge water
from the cyclone/classifiers can also be discharged to the grit collector influent channel.
Influent Pump Stations and Force Mains:
Seven dry pit, immersible influent pumps each provide a pumping capacity of 4,170 gpm, four at
74 feet of head and three at 96 feet of head. The total firm pumping capacity is 36 mgd. Five
influent pumps are located in the New Influent Pump Station, and the other two pumps are
located in the Old Influent Pump Station. The wet wells for the two influent pump stations are
interconnected by a gated 24-inch pipe, which allows each of the wet wells to be isolated for

dewatering and maintenance. The three high head pumps in the New Influent Pump Station are
designed to be used for pumping to the flow equalization tank. Two 36-inch diameter force
mains are used to convey the influent flow from the influent pump stations to the flow
equalization tank and the BNR basins. The force mains also receive RAS flow from the two RAS
pump stations for conveyance to the BNR basins. The force main diameters are increased from
36-inches to 42-inches to accommodate the RAS and flow equalization tank effluent flows.
Flow Equalization Tank:
One 150-foot diameter flow equalization tank, with a volume of 3.0 million gallons, is provided
for equalizing normal diurnal flows and peak wet weather flows. The stored wastewater then
flows by gravity to the BNR basins when high flow conditions subside.
BNR Basins:
The Big Buffalo WWTP has four sloped wall BNR basins with a total volume of 7.0 million
gallons (MG). The BNR basins were originally two basins, and were converted to the four BNR
basins by the addition of longitudinal center walls and baffle walls to separate the BNR zones.
Jet mixing systems are provided in the anaerobic and anoxic zones for mixing. Fine bubble
diffusers are provided in the aerobic zones for aeration, and single drop diffusers are provided in
the reaeration zones. Two reaeration zones are provided, one in each pair of BNR basins. Air
for the aerobic and reaeration zones is provided by two large and two small high speed, single -
stage, centrifugal blowers in the Blower Building. The aeration blowers can also provide air to
the jet mixing systems in the anoxic zones, if needed for nitrification. Operation in the BNR
mode is required for at least part of the year to meet seasonal mass loading limits for nitrogen
and phosphorus. Methanol or another supplemental carbon source can be added to the second
anoxic zone of the BNR basins, if needed to provide an additional food source for denitrification.
Effluent weirs are used to control water level in the BNR basins and to split flow to the
secondary clarifiers.
Secondary Clarifiers:
The plant has three 85-foot diameter and two 105-foot diameter secondary clarifiers. The
clarifiers have suction -type sludge removal mechanisms, with separate solids removal/drain
pipes for heavy solids removal. The five secondary clarifiers provide an overflow rate of 350
gpd/ft2 at the plant design capacity of 12 mgd.
Return Activated Sludge (RAS) Pump Stations and Waste Sludge Pumps:
Return activated sludge flow is provided by six RAS pumps in two RAS pump stations. Three of
the RAS pumps each provide a capacity of 2,361 gpm at 33 feet of head, and the other three
RAS pumps each provide a capacity of 2,100 gpm at 38 feet of head, for a total firm pumping
capacity of 12.8 mgd. The return sludge flow from each of Secondary Clarifiers No. 1-3 is
controlled through a control valve and Parshall flume.
The return sludge flow from each of Secondary Clarifiers No. 4 and 5 is controlled by varying
the speed of the RAS pumps. Sludge is wasted from RAS Pump Station No. 1 to the solids
handling facilities using two waste activated sludge (WAS) pumps, each with a pumping
capacity of 600 gpm.

Denitrification Filters:
The Big Buffalo Plant has 14 denitrification filters, six of which are 14 feet by 14 feet and have a
media depth of 36 inches, and eight of which are 9.5 feet by 42 feet and have a media depth of
72 inches. The 14 filters have sand media, and provide a filter loading rate of 2 gpm/ft2 at the
plant design flow of 12 mgd. A filter bypass weir in Filter Facility No. 1 (Filters No. 1-6) is
provided to automatically divert excess flow around the filters when high water levels are
experienced in the filters.
The former chlorine contact tanks are used for backwash storage. A washwater reclaim
equalization tank is used prior to draining backwash water to the head of the plant. Two
backwash pumps and two air scour blowers are used for normal backwashes and for "bumping"
the filters to remove nitrogen gas when the filters are operated in the denitrification mode.
Methanol or another supplemental carbon source can be added to the filters for denitrification.
Ultraviolet Disinfection Facility and Effluent Flow Measurement:
An ultraviolet (UV) disinfection system, with low pressure, high output, vertical lamps
submerged in the wastewater, is used for disinfection of plant effluent. Four UV disinfection
channels are provided, each with three modules with 36 lamps in each module, and each with a
peak flow capacity of 9 mgd. A Parshall flume downstream of the UV channels is provided for
effluent flow measurement.
Off -Site Water Reclamation and Effluent Water Use:
The off -site reclaimed water (RCW) system consists of two 700-gpm submersible pumps,
disinfection with sodium hypochlorite solution, and approximately 21,000 linear feet of 12-inch
force main to a storage pond at the Sanford Municipal Golf Course. One on -site RCW pump is
provided for on -site irrigation, and has a capacity of 35 gpm. Three 70-gpm non -potable water
(NPW) pumps are used to provide non -potable water for spray at the secondary clarifier inlets
and influent pump stations, belt washwater for the gravity belt thickeners and other intermittent
uses.
Plant Outfall and Discharge Structure:
The plant outfall consists of approximately 2,200 feet of 48-inch pipe to a discharge structure at
the Deep River.

32039-006-Flow Schematic cdr
PLANT
INFLUENT
Q=12.0 mg
FBWR Q=0.35 mgd
♦ BAR SCREENS (4)
4
GRIT
COLLECTOR
(2)
Q=12.52 mgd
FILTRATE Q=0.17 mgd
ALUM,
METHANOL
INFLUENT
PUMP
STATIONS
(2)
_TEIER÷
AERATION
BASINS (4)
Q=18.52 mgd
RAS
ALUM,
METHANOL
FBWR FBW Q=0.35 mgd
WASHWATER
RECLAIM
TANK(1) SECONDARY
CLARIFIERS
(5)
Q=6.0 mgd
WAS
SUPERNATANT Q=0.0 mgd
GRAVITY BELT
THICKENER
(2)
Q=0.20 mgd
Hazen
AEROBIC
DIGESTERS
(4)
SLUDGE
STORAGE
TANKS
(2)
o �
DENITRIFICATION UV
FILTERS DISINFECTION
(14)
Q=12.32 mgd Q=12.32 mgd
RAS
PUMP
STATION (1)
Q=0.03 mgd
M -►
LQ=11.95 mgd
RECLAIMED
WATER
PUMP STATION
TRUCK HAULING
TO LAND
APPLICATION
EFFLUENT TO
DEEP RIVER
SODIUM
HYPOCHLORITE
RECLAIMED
WATER TO
GOLF COURSE
LEGEND
FBW FILTER BACKWASH
FBWR FILTER BACKWASH RETURN
RAS RETURN ACTIVATED SLUDGE
WAS WASTE ACTIVATED SLUDGE
M
FLOW METER
PUMPS
Figure 2:
Process Flow Schematic
Big Buffalo WWTP
NPDES Permit Renewal Application
City of Sanford, NC

Tab C

Big Buffalo Wastewater Treatment Plant
City of Sanford
Residuals Management Plan

BIG BUFFALO WWTP
RESIDUALS MANAGEMENT PLAN
The solids handling facilities at the Big Buffalo WWTP includes of two gravity belt thickeners,
four aerobic digesters, two sludge storage tanks, and associated pumps and process
equipment. The City of Sanford contracts with Synagro Technology to land apply the biosolids
produced at the Big Buffalo WWTP.
At the Big Buffalo WWTP, Waste Activated Sludge (WAS) is pumped from the Return Activated
Sludge (RAS) Pump Station to the Sludge Thickening Building. Waste sludge is thickened by
the 1.7-meter gravity belt thickeners (GBT) to a total solids concentration ranging between
4 and 5%. The thickened sludge is then pumped by two progressing cavity pumps to one of the
four 100-ft diameter aerobic digesters. Polymer is added to the gravity belt thickeners to
improve performance and solids capture.
Aerobic digestion is accomplished through the use of jet mixing and jet mixing/aeration headers
with separate blowers for aeration and mixing of the sludge. After a sufficient period of time of
aerobic digestion within the sludge storage tanks for volatile solids destruction, the digested
sludge flows by gravity to one of the two 750,000 gallon sludge storage tanks. Thickened
aerobically digested sludge is pumped from the sludge storage tanks into trucks for land
application. The solids are land applied to privately -owned agricultural sites.
Volatile solids reductions consistently exceed the minimum 38% required for compliance with
regulations for Class B biosolids. The volatile solids destruction at design conditions for the
12 mgd plant exceeds 49% with the operation of the four aerobic digestors with jet mixing and
the two sloped wall sludge storage tanks with floating aerators. The Big Buffalo WWTP solids
handling facilities are designed for an annual average solids production of 14,400 Ib. of dry
solids per day or 1,200 Ibs/MG of wastewater treated.
The four 100-foot diameter aerobic digesters provide adequate aerobic digestion and sludge
storage capacity required for the design annual average flow of 12 mgd. Under design annual
average conditions, the aerobic digesters provide approximately 233 days of retention time.
The sloped wall sludge storage tanks provide an additional 61 days of storage at annual
average conditions. The solids comply with 40 CFR Part 503 requirements for vector attraction
reduction by achieving a volatile solids reduction of greater than 38 percent, and comply with
pathogen reduction requirements by laboratory testing for fecal coliforms.
The Big Buffalo Plant currently disposes of its solids by land application of liquid digested
biosolids on agricultural lands under a permit issued by the N.C. Division of Water Resources
(Permit No. WQ0000543). The permit specifies the allowable solids application rates and the
monitoring requirements to assure the protection of public health and the environment. The City
of Sanford currently has approximately 1,070 acres of land application area dedicated for the
disposal of biosolids. This land area is adequate capacity for the amount of biosolids produced
at the plant with a 12 mgd design flow.
SCREENINGS AND GRIT DISPOSAL
The preliminary treatment facilities at the Big Buffalo WWTP consist of two fine screens, with a
bypass channel; and two detritors (grit collectors) and associated grit pumps, cyclones, and
classifiers. Each fine screen has an associated compactor to remove excess water prior to
transporting the screenings to the landfill. The two detritors remove grit from the treatment
1

stream prior to being pumped to the BNR basins. The removed grit is discharged to dumpsters
for disposal in a landfill.
2

Tab D

Big Buffalo Wastewater Treatment Plant
City of Sanford
First Species Effluent Toxicity Testing Data
2017-2021

Summary of Big Buffalo WWTP - City of Sanford
First Species Effluent Toxicity Testing Summary Table
Sample Date
Contract Lab
Organism
Location
Pass/Fail
% Control Organisms Producing 3rd Brood
Monday, March 13, 2017
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, June 12, 2017
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
91.7%
Monday, September 18, 2017
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, December 11, 2017
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
91.7%
Monday, March 12, 2018
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, June 11, 2018
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, September 17, 2018
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
91.7%
Monday, December 10, 2018
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
91.7%
Monday, March 11, 2019
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, June 10, 2019
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, September 16, 2019
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, December 9, 2019
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, March 9, 2020
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, June 8, 2020
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, September 21, 2020
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, December 14, 2020
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, March 8, 2021
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, June 14, 2021
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%
Monday, September 20, 2021
Meritech, Inc.
Ceriodaphnia
dubia
EFF
Pass
100%

Tab E

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: June
Year: 2018
Facility Name: Big Buffalo WWTP
ORC: Scott Siletzky
Phone: [phone]
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Analytical Laboratory
Ammonia (as N)
Composite
EPA 350.1
1.0
< 1.0
mg/L
1
6/13/2018
Big Buffalo WWTP
Dissolved oxygen
Grab
SM 45000G
0.1
7.8
mg/L
1
6/13/2018
Big Buffalo WWTP
Nitrate/Nitrite
Composite
EPA 353.2
0.1
2.64
mg/L
1
6/13/2018
Meritech Inc
Total Kjeldahl nitrogen
Composite
EPA 351.1
0.2
2.37
mg/L
1
6/13/2018
Meritech Inc
Total Phosphorus
Composite
EPA 200.7
0.02
3.16
mg/L
1
6/13/2018
Meritech Inc
Total dissolved solids
Composite
SM 2540C
10
439
mg/L
1
6/13/2018
Meritech Inc
Hardness
Composite
SM 2340B
1
72
mg/L
1
6/13/2018
Meritech Inc
Chlorine (total residual, TRC)
Grab
SM 4500 C1G
20
N/A
pg/L
1
6/13/2018
Oil and grease
Metals (total recoverable), cyanide
Antimony
Grab
and total phenols
Composite
EPA 1664A
EPA200.7
5.0
0.025
< 5
< 0.025
mg/L
mg/L
1
1
6/13/2018
6/13/2018
Meritech Inc
_
Meritech Inc
Arsenic
Composite
EPA200.7
0.010
< 0.010
mg/L
1
6/13/2018
Meritech Inc
Beryllium
Composite
EPA200.7
0.005
< 0.005
mg/L
1
6/13/2018
Meritech Inc
Cadmium
Composite
EPA200.7
0.002
< 0.002
mg/L
1
6/13/2018
Meritech Inc
Chromium
Composite
EPA200.7
0.005
< 0.005
mg/L
1
6/13/2018
Meritech Inc
Copper
Composite
EPA200.7
0.002
0.005
mg/L
1
6/13/2018
Meritech Inc
Lead
Composite
EPA200.7
0.010
< 0.010
mg/L
1
6/13/2018
Meritech Inc
Mercury
Grab
EPA 1631
1.00
2.62
ng/1
1
6/13/2018
Meritech Inc
Nickel
Composite
EPA 200.7
0.010
0.011
mg/L
1
6/13/2018
Meritech Inc
Selenium
Composite
EPA200.7
0.010
< 0.010
mg/L
1
6/13/2018
Meritech Inc
Silver
Composite
EPA200.7
0.005
< 0.005
mg/L
1
6/13/2018
Meritech Inc
Thallium
Composite
EPA200.7
0.020
< 0.020
mg/L
1
6/13/2018
Meritech Inc
Zinc
Composite
EPA 200.7
0.010
0.074
mg/L
1
6/13/2018
Meritech Inc
Cyanide
Grab
EPA335.4
0.005
< 0.005
mg/L
1
6/13/2018
Meritech Inc
Total phenolic compounds
Volatile organic compounds
Grab
Grab
EPA 420.1
EPA624
0.010
50
0.032
< 50
mg/L
µg/L
1
1
6/13/2018
6/13/2018
Meritech Inc
Meritech Inc
Acrolein
Acrylonitrile
Grab
EPA624
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Benzene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Bromoform
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Carbon tetrachloride
Grab
EPA 624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Chlorobenzene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Chlorodibromomethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1, 2 Dibromoethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Chloroethane
Grab
EPA624
5.0
< 5.0
µg/L
1
6/13/2018
Meritech Inc
2-chloroethylvinyl ether
Grab
EPA 624
5.0
< 5.0
µg/L
1
6/13/2018
Meritech Inc
Chloroform
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Dichlorobromomethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Dichlorodifluoromethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1,1-dichloroethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1,2-dichloroethane
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1,4-Dichlorobenzene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1,2-Dichlorobenzene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
1,3-dichlorobenzene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Trans-1,2-dichloroethylene
Grab
EPA624
1.0
< 1.0
µg/L
1
6/13/2018
Meritech Inc
Form - DMR- PPA-1
Page 1

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: June
Year: 2018
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Volatile organic compounds (Cont.
1,1-dichloroethylene
Grab
EPA 624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
1,2-dichloropropane
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
cis-1,3 dichloropropylene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
trans-1,3-dichloropropylene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Ethylbenzene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Methyl bromide
Grab
EPA 624
5.0
< 5.0
pg/L
1
6/13/2018
Meritech Inc
Methyl chloride
Grab
EPA 624
5.0
< 5.0
pg/L
1
6/13/2018
Meritech Inc
Methylene chloride
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
1,1,2,2-tetrachloroethane
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Tetrachloroethylene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Toluene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
1,1,1-trichloroethane
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
1,1,2-trichloroethane
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Trichloroethylene
Grab
EPA624
1.0
< 1.0
pg/L
1
6/13/2018
Meritech Inc
Trichlorofluoromethane
Grab
EPA624
5.0
< 5.0
µg/L
1
6/13/2018
Meritech Inc
Vinyl chloride
Grab
EPA 624
5.0
< 5.0
pg/L
1
6/13/2018
Meritech Inc
Acid -extractable compounds
P-chloro-m-cresol
Composite
EPA 625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
2-chlorophenol
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
2,4-dichlorophenol
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
2,4-dimethylphenol
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
4,6-dinitro-o-cresol
Composite
EPA625
50
< 50
pg/L
1
6/13/2018
Meritech Inc
2,4-dinitrophenol
Composite
EPA625
50
< 50
pg/L
1
6/13/2018
Meritech Inc
2-nitrophenol
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
4-nitrophenol
Composite
EPA625
50
< 50
pg/L
1
6/13/2018
Meritech Inc
Pentachlorophenol
Composite
EPA625
50
< 50
pg/L
1
6/13/2018
Meritech Inc
Phenol
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
2,4,6-trichlorophenol
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Base -neutral compounds
Acenaphthene
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Acenaphthylene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Anthracene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Benzidine
Composite
EPA625
50
< 50
pg/L
1
6/13/2018
Meritech Inc
Benzo(a)anthracene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Benzo(a)pyrene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
3,4 benzofluoranthene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Benzo(g,h,i)perylene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Benzo(k)fluoranthene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Bis (2-chloroethoxy) methane
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Bis (2-chloroethyl) ether
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Bis (2-chloroisopropyl) ether
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Bis (2-ethylhexyl) phthalate
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
4-bromophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Benzyl butyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
2-chloronaphthalene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
4-chlorophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Form - DMR- PPA-1
Page 2

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: June
Year: 2018
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Units of
Measurement
Number
of
samples
Base -neutral compounds (cont.)
Chrysene
Composite
EPA 625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Di-n-butyl phthalate
Composite
EPA 625
10
< 10
µg/ L
1
6/13/2018
Meritech Inc
Di-n-octyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Dibenzo(a,h)anthracene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
1,2-dichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
1,3-dichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
1,4-dichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
3,3-dichlorobenzidine
Composite
EPA625
50
< 50
µg/L
1
6/13/2018
Meritech Inc
Diethyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Dimethyl phthalate
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
2,4-dinitrotoluene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
2,6-dinitrotoluene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
1,2-diphenylhydrazine
Composite
EPA 625
10
< 10
pg/L
1
6/13/2018
Meritech Inc
Fluoranthene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Fluorene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Hexachlorobenzene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Hexachlorobutadiene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Hexachlorocyclopentadiene
Composite
EPA 625
50
< 50
µg/L
1
6/13/2018
Meritech Inc
Hexachloroethane
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Indeno(1,2,3-cd)pyrene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Isophorone
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
2-Methylnaphthalene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Naphthalene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Nitrobenzene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
N-nitrosodi-n-propylamine
Composite
EPA 625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
N-nitrosodimethylamine
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
N-nitrosodiphenylamine
Composite
EPA 625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Phenanthrene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Pyrene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
1,2,4,-trichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
6/13/2018
Meritech Inc
Authorized Representative name
Signature
Date
I certify under penalty of law that this document and all attachments were prepared under my direction
ana supervision in accoraance wim a system to aesign to assure mat quaunea peraonnei properly
gatner ana evaluate tne information submittea. tsasea on my inquiry of tne person or persons tnat
manage the system, or those persons directly responsibel 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.
Form - DMR- PPA-1
Page 3

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: March
Year: 2019
Facility Name: Big Buffalo WWTP
ORC: Scott Siletzky
Phone: [phone]
arameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Analytical Laboratory
Ammonia (as N)
Composite
EPA 350.1
1.0
< 1.0
mg/L
1
3/12/2019
Big Buffalo WWTP
Dissolved oxygen
Grab
SM 45000G
0.1
9.5
mg/L
1
3/12/2019
Big Buffalo WWTP
Nitrate
Composite
353.2 R2-93
1.90
mg/L
1
4/9/2019
Environmental ONE
Nitrite
Composite
353.2 R2-93
0.02
mg/L
1
4/9/2019
Environmental ONE
Nitrate/Nitrite
Composite
EPA 353.2
0.1
14.1
mg/L
1
3/12/2019
Meritech Inc
Total Kjeldahl nitrogen
Composite
EPA 351.1
0.2
2.24
mg/L
1
3/12/2019
Meritech Inc
Total Phosphorus
Composite
EPA 200.7
0.02
3.34
mg/L
1
3/12/2019
Meritech Inc
Total dissolved solids
Composite
SM 2540C
10
307
mg/L
1
3/12/2019
Meritech Inc
Hardness
Composite
SM 2340B
1
52
mg/L
1
3/12/2019
Meritech Inc
Chlorine (total residual, TRC)
Grab
SM 4500 C1G
20
< 20
µg/L
1
4/8/2019
Big Buffalo WWTP
Oil and grease
Metals (total recoverable), cyanide
Grab
and total phenols
Composite
EPA 1664B
EPA200.7
5.0
0.025
< 5
< 0.025
mg/L
mg/L
1
1
3/12/2019
3/12/2019
Meritech Inc
i
Meritech Inc
Antimony
Arsenic
Composite
EPA200.7
0.010
< 0.010
mg/L
1
3/12/2019
Meritech Inc
Beryllium
Composite
EPA200.7
0.005
< 0.005
mg/L
1
3/12/2019
Meritech Inc
Cadmium
Composite
EPA200.7
0.002
< 0.002
mg/L
1
3/12/2019
Meritech Inc
Chromium
Composite
EPA200.7
0.005
< 0.005
mg/L
1
3/12/2019
Meritech Inc
Copper
Composite
EPA 200.7
0.002
0.005
mg/L
1
3/12/2019
Meritech Inc
Lead
Composite
EPA200.7
0.010
< 0.010
mg/L
1
3/12/2019
Meritech Inc
Mercury
Grab
EPA 1631
1.00
< 1
ng/1
1
3/12/2019
Environmental ONE
Nickel
Composite
EPA200.7
0.010
< 0.010
mg/L
1
3/12/2019
Meritech Inc
Selenium
Composite
EPA200.7
0.010
< 0.010
mg/L
1
3/12/2019
Meritech Inc
Silver
Composite
EPA200.7
0.005
< 0.005
mg/L
1
3/12/2019
Meritech Inc
Thallium
Composite
EPA200.7
0.020
< 0.020
mg/L
1
3/12/2019
Meritech Inc
Zinc
Composite
EPA200.7
0.010
0.044
mg/L
1
3/12/2019
Meritech Inc
Cyanide
Grab
EPA335.4
0.005
< 0.005
mg/L
1
3/12/2019
Meritech Inc
Total phenolic compounds
Volatile organic compounds
Acrolein
Grab
Grab
EPA 420.1
EPA624
0.010
50
< 0.010
< 50.0
mg/L
i
pg/L
1
-
1
3/12/2019
3/12/2019
Meritech Inc
el
Meritech Inc
Acrylonitrile
Grab
EPA624
10
< 10.0
pg/L
1
3/12/2019
Meritech Inc
Benzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Bromoform
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Carbon tetrachloride
Grab
EPA 624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Chlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Chlorodibromomethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1, 2 Dibromoethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Chloroethane
Grab
EPA624
5.0
< 5.00
µg/L
1
3/12/2019
Meritech Inc
2-chloroethylvinyl ether
Grab
EPA624
5.0
< 5.00
pg/L
1
3/12/2019
Meritech Inc
Chloroform
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Dichlorobromomethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,1-dichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,2-dichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,4-Dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,2-Dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,3-dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Trans-1,2-dichloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Form - DMR- PPA-1
Page 1

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: March
Year: 2019
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Volatile organic compounds (Cont.
1,1-dichloroethylene
Grab
EPA624
1.0
< 1.00
µg/L
1
3/12/2019
Meritech Inc
1,2-dichloropropane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
cis-1,3 dichloropropylene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
trans-1,3-dichloropropylene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Ethylbenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Methyl bromide
Grab
EPA 624
5.0
< 5.00
pg/L
1
3/12/2019
Meritech Inc
Methyl chloride
Grab
EPA 624
5.0
< 5.00
pg/L
1
3/12/2019
Meritech Inc
Methylene chloride
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,1,2,2-tetrachloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Tetrachloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Toluene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,1,1-trichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
1,1,2-trichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Trichloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
3/12/2019
Meritech Inc
Trichlorofluoromethane
Grab
EPA624
5.0
< 5.00
µg/L
1
3/12/2019
Meritech Inc
Vinyl chloride
Grab
EPA 624
5.0
< 5.00
pg/L
1
3/12/2019
Meritech Inc
Acid -extractable compounds
P-chloro-m-cresol
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
2-chlorophenol
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
2,4-dichlorophenol
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
2,4-dimethylphenol
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
4,6-dinitro-o-cresol
Composite
EPA625
50
< 50
pg/L
1
3/12/2019
Meritech Inc
2,4-dinitrophenol
Composite
EPA625
50
< 50
pg/L
1
3/12/2019
Meritech Inc
2-nitrophenol
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
4-nitrophenol
Composite
EPA625
50
< 50
pg/L
1
3/12/2019
Meritech Inc
Pentachlorophenol
Composite
EPA625
50
< 50
pg/L
1
3/12/2019
Meritech Inc
Phenol
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
2,4,6-trichlorophenol
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Base -neutral compounds
Acenaphthene
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Acenaphthylene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Anthracene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Benzidine
Composite
EPA625
50
< 50
pg/L
1
3/12/2019
Meritech Inc
Benzo(a)anthracene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Benzo(a)pyrene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
3,4 benzofluoranthene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Benzo(g,h,i)perylene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Benzo(k)fluoranthene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Bis (2-chloroethoxy) methane
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Bis (2-chloroethyl) ether
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Bis (2-chloroisopropyl) ether
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Bis (2-ethylhexyl) phthalate
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
4-bromophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Benzyl butyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
2-chloronaphthalene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
4-chlorophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Form - DMR- PPA-1
Page 2

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: March
Year: 2019
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Base -neutral compounds (cont.)
Chrysene
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Di-n-butyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Di-n-octyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
Dibenzo(a,h)anthracene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
1,2-dichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
3/12/2019
Meritech Inc
1,3-dichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
1,4-dichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
3,3-dichlorobenzidine
Composite
EPA625
50
< 50
µg/L
1
3/12/2019
Meritech Inc
Diethyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Dimethyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
2,4-dinitrotoluene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
2,6-dinitrotoluene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
1,2-diphenylhydrazine
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Fluoranthene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Fluorene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Hexachlorobenzene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Hexachlorobutadiene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Hexachlorocyclopentadiene
Composite
EPA 625
50
< 50
µg/L
1
3/12/2019
Meritech Inc
Hexachloroethane
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Indeno(1,2,3-cd)pyrene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Isophorone
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
2-Methylnaphthalene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Naphthalene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Nitrobenzene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
N-nitrosodi-n-propylamine
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
N-nitrosodimethylamine
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
N-nitrosodiphenylamine
Composite
EPA 625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Phenanthrene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Pyrene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
1,2,4,-trichlorobenzene
Composite
EPA625
10
< 10
µg/L
1
3/12/2019
Meritech Inc
Authorized Representative name
Signature
Date
I certify under penalty of law that this document and all attachments were prepared under my direction
ana supervision m accoraance wim a system to aesign to assure mat quaunea peraonnei properly
gatner ana evaluate the information submittea. liasea on my inquiry of the person or persons tnat
manage the system, or those persons directly responsibel 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.
Form - DMR- PPA-1
Page 3

Permit No.: NC0024147
Outfall: 001
Annual Monitoring and Pollutant Scan Month: December
Year: 2020
Facility Name: Big Buffalo WWTP
ORC: Scott Siletzky
Phone: [phone]
arameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Analytical Laboratory
Ammonia (as N)
Composite
EPA 350.1
1.0
< 1.0
mg/L
1
12/15/2020
Big Buffalo Creek WWTP
Dissolved oxygen
Grab
SM 45000G
0.1
8.9
mg/L
1
12/15/2020
Big Buffalo Creek WWTP
Nitrate
Composite
353.2 R2-93
4.75
mg/L
1
12/15/2020
Environmental One
Nitrite
Composite
353.2 R2-93
0.04
mg/L
1
12/15/2020
Environmental One
Nitrate/Nitrite
Composite
EPA 353.2
0.1
5.11
mg/L
1
12/15/2020
Meritech
Total Kjeldahl nitrogen
Composite
EPA 351.1
0.2
1.65
mg/L
1
12/15/2020
Meritech
Total Phosphorus
Composite
EPA 200.7
0.02
0.949
mg/L
1
12/15/2020
Meritech
Total dissolved solids
Composite
SM 2540C
10
293
mg/L
1
12/15/2020
Meritech
Hardness
Composite
SM 2340B
1
56
mg/L
1
12/15/2020
Meritech
Chlorine (total residual, TRC)
Grab
SM 4500 C1G
20
< 20
µg/L
1
12/15/2020
Big Buffalo Creek WWTP
Oil and grease
Metals (total recoverable), cyanide
Grab
and total phenols
Composite
EPA 1664B
EPA200.7
5.0
0.025
< 5
< 0.025
mg/L
mg/L
1
1
12/15/2020
12/15/2020
Meritech
Meritech
Antimony
Arsenic
Composite
EPA200.7
0.010
< 0.010
mg/L
1
12/15/2020
Meritech
Beryllium
Composite
EPA200.7
0.005
< 0.005
mg/L
1
12/15/2020
Meritech
Cadmium
Composite
EPA200.7
0.002
< 0.002
mg/L
1
12/15/2020
Meritech
Chromium
Composite
EPA200.7
0.005
0.006
mg/L
1
12/15/2020
Meritech
Copper
Composite
EPA200.7
0.002
0.005
mg/L
1
12/15/2020
Meritech
Lead
Composite
EPA200.7
0.010
< 0.010
mg/L
1
12/15/2020
Meritech
Mercury
Grab
EPA 1631
1.00
< 1.0
ng/1
1
12/15/2020
Meritech
Nickel
Composite
EPA200.7
0.010
0.014
mg/L
1
12/15/2020
Meritech
Selenium
Composite
EPA200.7
0.010
< 0.010
mg/L
1
12/15/2020
Meritech
Silver
Composite
EPA200.7
0.005
< 0.005
mg/L
1
12/15/2020
Meritech
Thallium
Composite
EPA200.7
0.020
< 0.020
mg/L
1
12/15/2020
Meritech
Zinc
Composite
EPA200.7
0.010
0.051
mg/L
1
12/15/2020
Meritech
Cyanide
Grab
EPA335.4
0.005
< 0.005
mg/L
1
12/15/2020
Meritech
Total phenolic compounds
Volatile organic compounds
Acrolein
Grab
Grab
EPA 420.1
EPA624
0.010
50
< 0.010
< 50.0
mg/L
i
pg/L
1
-
1
12/15/2020
12/15/2020
Meritech
IIII
Meritech
Acrylonitrile
Grab
EPA624
10
< 10.0
pg/L
1
12/15/2020
Meritech
Benzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Bromoform
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Carbon tetrachloride
Grab
EPA 624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Chlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Chlorodibromomethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1, 2 Dibromoethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Chloroethane
Grab
EPA624
5.0
< 5.00
µg/L
1
12/15/2020
Meritech
2-chloroethylvinyl ether
Grab
EPA624
5.0
< 5.00
pg/L
1
12/15/2020
Meritech
Chloroform
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Dichlorobromomethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,1-dichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,2-dichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,4-Dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,2-Dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,3-dichlorobenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Trans-1,2-dichloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Form - DMR- PPA-1
Page 1

Permit No.: NC0024147
Outfall: 001
Annual Monitoring and Pollutant Scan Month: December
Year: 2020
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Volatile organic compounds (Cont.
1,1-dichloroethylene
Grab
EPA 624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,2-dichloropropane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
cis-1,3 dichloropropylene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
trans-1,3-dichloropropylene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Ethylbenzene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Methyl bromide
Grab
EPA 624
5.0
< 5.00
pg/L
1
12/ 15/2020
Meritech
Methyl chloride
Grab
EPA 624
5.0
< 5.00
pg/L
1
12/15/2020
Meritech
Methylene chloride
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,1,2,2-tetrachloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Tetrachloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Toluene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,1,1-trichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
1,1,2-trichloroethane
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Trichloroethylene
Grab
EPA624
1.0
< 1.00
pg/L
1
12/15/2020
Meritech
Trichlorofluoromethane
Grab
EPA624
5.0
< 5.00
pg/L
1
12/15/2020
Meritech
Vinyl chloride
Grab
EPA 624
5.0
< 5.00
pg/L
1
12/15/2020
Meritech
Acid -extractable compounds
P-chloro-m-cresol
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
2-chlorophenol
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
2,4-dichlorophenol
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
2,4-dimethylphenol
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
4,6-dinitro-o-cresol
Composite
EPA625
50
< 50
pg/L
1
12/15/2020
Meritech
2,4-dinitrophenol
Composite
EPA625
50
< 50
pg/L
1
12/15/2020
Meritech
2-nitrophenol
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
4-nitrophenol
Composite
EPA625
50
< 50
pg/L
1
12/15/2020
Meritech
Pentachlorophenol
Composite
EPA625
50
< 50
pg/L
1
12/15/2020
Meritech
Phenol
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
2,4,6-trichlorophenol
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Base -neutral compounds
Acenaphthene
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Acenaphthylene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Anthracene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Benzidine
Composite
EPA625
50
< 50
pg/L
1
12/15/202o
Meritech
Benzo(a)anthracene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Benzo(a)pyrene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
3,4 benzofluoranthene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Benzo(g,h,i)perylene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Benzo(k)fluoranthene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Bis (2-chloroethoxy) methane
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Bis (2-chloroethyl) ether
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Bis (2-chloroisopropyl) ether
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Bis (2-ethylhexyl) phthalate
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
4-bromophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
12/15/202o
Meritech
Benzyl butyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
2-chloronaphthalene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
4-chlorophenyl phenyl ether
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Form - DMR- PPA-1
Page 2

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: December
Year: 2020
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Base -neutral compounds (cont.)
J
Chrysene
Composite
EPA 625
10
< 10
µg/L
1
12/15/2020
Meritech
Di-n-butyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
12/15/2020
Meritech
Di-n-octyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Dibenzo(a,h)anthracene
Composite
EPA625
10
< 10
µg/L
1
12/15/2020
Meritech
1,2-dichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
1,3-dichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
1,4-dichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
3,3-dichlorobenzidine
Composite
EPA625
50
< 50
pg/L
1
12/15/2020
Meritech
Diethyl phthalate
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
Dimethyl phthalate
Composite
EPA 625
10
< 10
µg/L
1
12/15/2020
Meritech
2,4-dinitrotoluene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
2,6-dinitrotoluene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
1,2-diphenylhydrazine
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Fluoranthene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Fluorene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Hexachlorobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Hexachlorobutadiene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Hexachlorocyclopentadiene
Composite
EPA 625
50
< 50
pg/L
1
12/15/2020
Meritech
Hexachloroethane
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Indeno(1,2,3-cd)pyrene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Isophorone
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
2-Methylnaphthalene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Naphthalene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Nitrobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
N-nitrosodi-n-propylamine
Composite
EPA 625
10
< 10
pg/L
1
12/15/2020
Meritech
N-nitrosodimethylamine
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
N-nitrosodiphenylamine
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Phenanthrene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Pyrene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
1,2,4,-trichlorobenzene
Composite
EPA625
10
< 10
pg/L
1
12/15/2020
Meritech
Authorized Representative name
Signature
Date
I certify under penalty of law that this document and all attachments were prepared under my direction
ana supervision m accoraance wim a system to aesign to assure mat quaunea peraonnei properly
gatner ana evaluate the information submittea. tsasea on my inquiry of the person or persons tnat
manage the system, or those persons directly responsibel 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.
Form - DMR- PPA-1
Page 3

Permit No.: NC0024147
Outfall: 001
Annual Monitoring and Pollutant Scan Month: September
Year: 2021
Facility Name: Big Buffalo WWTP
ORC: Scott Siletzky
Phone: [phone]
A x10 dilution was used for the 624 volatile analysis.
arameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Analytical Laboratory
Ammonia (as N)
Composite
EPA 350.1
0.1
< 0.1
mg/L
1
9/21/2021
Meritech
Dissolved oxygen
Grab
SM 45000G
0.1
7.9
mg/L
1
9/21/2021
Big Buffalo Creek WWTP
Nitrate
Composite
353.2 R2-93
2.97
mg/L
1
9/20/2021
Environment 1
Nitrite
Composite
353.2 R2-93
0.05
mg/L
1
9/20/2021
Environment 1
Nitrate/Nitrite
Composite
EPA 353.2
0.1
2.96
mg/L
1
9/21/2021
Meritech
Total Kjeldahl nitrogen
Composite
EPA 351.1
0.2
1.33
mg/L
1
9/21/2021
Meritech
Total Phosphorus
Composite
EPA 200.7
0.02
3.02
mg/L
1
9/21/2021
Meritech
Total dissolved solids
Composite
SM 2540C
10
322
mg/L
1
9/21/2021
Meritech
Hardness
Composite
SM 2340B
1
68
mg/L
1
9/21/2021
Meritech
Chlorine (total residual, TRC)
Grab
SM 4500 C1G
0.05
< 0.05
mg/L
1
9/22/2021
Cameron Testing
Oil and grease
Metals (total recoverable), cyanide
Grab
and total phenols
Composite
EPA 1664B
EPA 200.7
5.0
0.025
< 5
< 0.025
mg/L
mg/L
1
1
9/21/2021
9/21/2021
Meritech
Meritech
Antimony
Arsenic
Composite
EPA 200.7
0.010
< 0.010
mg/L
1
9/21/2021
Meritech
Beryllium
Composite
EPA 200.7
0.005
< 0.005
mg/L
1
9/21/2021
Meritech
Cadmium
Composite
EPA 200.7
0.002
< 0.002
mg/L
1
9/21/2021
Meritech
Chromium
Composite
EPA 200.7
0.005
< 0.005
mg/L
1
9/21/2021
Meritech
Copper
Composite
EPA 200.7
0.002
0.004
mg/L
1
9/21/2021
Meritech
Lead
Composite
EPA 200.7
0.010
< 0.010
mg/L
1
9/21/2021
Meritech
Mercury
Grab
EPA 1631
1.00
< 1.0
ng/1
1
9/21/2021
Meritech
Nickel
Composite
EPA 200.7
0.010
< 0.010
mg/L
1
9/21/2021
Meritech
Selenium
Composite
EPA 200.7
0.010
< 0.010
mg/L
1
9/21/2021
Meritech
Silver
Composite
EPA 200.7
0.005
< 0.005
mg/L
1
9/21/2021
Meritech
Thallium
Composite
EPA 200.7
0.020
< 0.020
mg/L
1
9/21/2021
Meritech
Zinc
Composite
EPA 200.7
0.010
0.053
mg/L
1
9/21/2021
Meritech
Cyanide
Grab
EPA 335.4
0.005
< 0.005
mg/L
1
9/21/2021
Meritech
Total phenolic compounds
Volatile organic compounds
Acrolein
Grab
Grab
EPA 420.1
EPA624
0.010
50
0.016
< 500
mg/L
i
µg/L
1
1
9/21/2021
9/21/2021
Meritech
11.11
Meritech
Acrylonitrile
Grab
EPA 624
10
< 100
pg/L
1
9/21/2021
Meritech
Benzene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Bromoform
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Carbon tetrachloride
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Chlorobenzene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Chlorodibromomethane
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1, 2 Dibromoethane
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Chloroethane
Grab
EPA624
5.0
< 50
pg/L
1
9/21/2021
Meritech
2-chloroethylvinyl ether
Grab
EPA 624
5.0
< 50
pg/L
1
9/21/2021
Meritech
Chloroform
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Dichlorobromomethane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,1-dichloroethane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,2-dichloroethane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,4-Dichlorobenzene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,2-Dichlorobenzene
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,3-dichlorobenzene
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Trans-1,2-dichloroethylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Form - DMR- PPA-1
Page 1

Permit No.: NC0024147
Outfall: 001
Annual Monitoring and Pollutant Scan Month: September
Year: 2021
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Date of
Sampling
Volatile organic compounds (Cont.
1,1-dichloroethylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,2-dichloropropane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
cis-1,3 dichloropropylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
trans-1,3-dichloropropylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Ethylbenzene
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Methyl bromide
Grab
EPA 624
5.0
< 50
pg/L
1
9/21/2021
Meritech
Methyl chloride
Grab
EPA 624
5.0
< 10
pg/L
1
9/21/2021
Meritech
Methylene chloride
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,1,2,2-tetrachloroethane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Tetrachloroethylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Toluene
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,1,1-trichloroethane
Grab
EPA624
1.0
< 10
pg/L
1
9/21/2021
Meritech
1,1,2-trichloroethane
Grab
EPA624
1.0
<10
pg/L
1
9/21/2021
Meritech
Trichloroethylene
Grab
EPA 624
1.0
< 10
pg/L
1
9/21/2021
Meritech
Trichlorofluoromethane
Grab
EPA 624
5.0
< 50
pg/L
1
9/21/2021
Meritech
Vinyl chloride
Grab
EPA 624
5.0
< 50
pg/L
1
9/21/2021
Meritech
Acid -extractable compounds
P-chloro-m-cresol
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
2-chlorophenol
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
2,4-dichlorophenol
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
2,4-dimethylphenol
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
4,6-dinitro-o-cresol
Grab
EPA625
50
< 50
pg/L
1
9/21/2021
Meritech
2,4-dinitrophenol
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
2-nitrophenol
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
4-nitrophenol
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
Pentachlorophenol
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
Phenol
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
2,4,6-trichlorophenol
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Base -neutral compounds
Acenaphthene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Acenaphthylene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Anthracene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
Benzidine
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
Benzo(a)anthracene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Benzo(a)pyrene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
3,4 benzofluoranthene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Benzo(g,h,i)perylene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Benzo(k)fluoranthene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Bis (2-chloroethoxy) methane
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Bis (2-chloroethyl) ether
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
Bis (2-chloroisopropyl) ether
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Bis (2-ethylhexyl) phthalate
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
4-bromophenyl phenyl ether
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Benzyl butyl phthalate
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
2-chloronaphthalene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
4-chlorophenyl phenyl ether
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Form - DMR- PPA-1
Page 2

Permit No.: NC0024147 Annual Monitoring and Pollutant Scan
Outfall: 001
Month: September
Year: 2021
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number
of
samples
Base -neutral compounds (cont.)
Chrysene
Grab
EPA 625
10
< 10
µg/L
1
9/21/2021
Meritech
Di-n-butyl phthalate
Grab
EPA 625
10
< 10
µg/L
1
9/21/2021
Meritech
Di-n-octyl phthalate
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Dibenzo(a,h)anthracene
Grab
EPA625
10
< 10
µg/L
1
9/21/2021
Meritech
1,2-dichlorobenzene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
1,3-dichlorobenzene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
1,4-dichlorobenzene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
3,3-dichlorobenzidine
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
Diethyl phthalate
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Dimethyl phthalate
Grab
EPA 625
10
< 10
µg/L
1
9/21/2021
Meritech
2,4-dinitrotoluene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
2,6-dinitrotoluene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
1,2-diphenylhydrazine
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Fluoranthene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Fluorene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Hexachlorobenzene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Hexachlorobutadiene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Hexachlorocyclopentadiene
Grab
EPA 625
50
< 50
pg/L
1
9/21/2021
Meritech
Hexachloroethane
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Indeno(1,2,3-cd)pyrene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
Isophorone
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
2-Methylnaphthalene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
Naphthalene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Nitrobenzene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
N-nitrosodi-n-propylamine
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
N-nitrosodimethylamine
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
N-nitrosodiphenylamine
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Phenanthrene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
Pyrene
Grab
EPA 625
10
< 10
pg/L
1
9/21/2021
Meritech
1,2,4,-trichlorobenzene
Grab
EPA625
10
< 10
pg/L
1
9/21/2021
Meritech
Authorized Representative name
Signature
Date
I certify under penalty of law that this document and all attachments were prepared under my direction
ana supervision m accoraance wim a system to aesign to assure mat quaunea personnel properly
gatner ana evaluate the information submittea. tsasea on my inquiry of the person or persons tnat
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.
Form - DMR- PPA-1
Page 3

Tab F

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test
Date 9/29/2017
Facility Sanford
Labatory Mentech, Inc
Signature oator in Re Gorge
xr
Signature of Laboratory Supervisor
NPDES # NCOO 24147
lbliss-/°?
P
pe # 001 County Lee
Comments
MAIL ORIGINAL TO
Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N C 27699-1621
Test Initiation Date/Time 9/19/2017
% Eff
Control
Repl
Surviving #
Original #
Wt/original (mg)
11 25
Surviving #
Original #
Wt/original (mg)
22 5
Surviving #
Original #
Wt/original (mg)
45
Surviving #
Original #
Wt/original (mg)
67 5
Surviving #
Original #
Wt/original (mg)
90
Surviving #
Original #
Wt/original (mg)
Water Quality Data
Control
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlonne(mg/L)
Temp at Receipt (°C)
Dilution H2O Batch #
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
1
2
515PM
3
4
Avg Wt/Sury Control
10
8
5
10
10
10
10
10
0891
0722
0404
0848
10
10
8
9
10
10
10
10
0
940
1
006
0
654
0
776
9
10
10
10
10
10
10
10
0
868
0
996
1
081
0
879
10
9
8
10
10
10
10
10
0
999
0
901
0
824
1
123
10
8
9
10
10
10
10
10
1
066
0
952
0
909
1
186
10
9
10
10
10
10
10
10
1
165
0
969
1
016
0
962
Day
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
0 862
82 5
0 716
92 5
0 844
97 5
0 956
92 5
0 962
92 5
1 028
97 5
1 028
Test Organisms
Cultured In -House
Pr Outside Supplier
Hatch Date 9/18/17
Hatch Time 3 00 pm CT
0
1
2
3
4
5
808 /
786
819 /
782
815 /
781
813 /
784
816 /
790
815 /
790
820 /
762
692 /
723
795 /
674
812 /
690
784 /
691
807 /
715
800 /
703
793 /
578
247 /
247
247 /
248
250 /
253
248 /
255
244 /
255
249 /
242
244 /
248
0
1
2
3
4
5
6
770 /
807
797 /
805
781 /
802
796 /
803
777 /
805
788 /
815
795 /
790
694 /
735
787 /
690
823 /
674
785 /
653
790 /
670
786 /
707
797 /
582
244 /
248
241 /
248
244 /
243
250 /
256
254 /
259
247 /
252
255 /
251
1
2
3
9/18/2017
9/20/2017
9/21/2017
24 0
24 0
24 0
80
78
83
100
121
119
723
800
804
<0 1
<0 1
<0 1
24
14
13
1198
42
54
200
1199
1200
42
44
53
55
194
209
Normal
Horn Var
NOEC
LOEC
ChV
Method
Sury val
Yes
Yes
90
Growth
Fl
Fl
90
>90 >90
>90
>90
Steel's Dunnett's
Overall Result
ChV
>90
Stats
Conc
11 25
Survival
Critical
2 41
Calculated
-1 1655
Growth
Critical Calculated
2 41 -1 2506
22 5
2
41
-1
7483
2
41
-2
3470
45
2
41
-1
1655
2
41
-2
4033
67 5
2
41
-1
1655
2
41
-3
0543
90
2
41
-1
7483
2
41
-3
0518

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test
Date 6/21/2018
Facility Sanford WWTP
Laboratory Meritech, Inc
x%/
NPDES # NC00 24147
to- ww-1r
Signature of Operator in R
x
p
rge
Signature of Laboratory Supervisor
Pipe # 001 County Lee
Comments
MAIL ORIGINAL TO*
Watei Sciences Section
Aquatic Toxicology Blanch
Division of Water Resources
1621 Mail Sei vice Center
Raleigh, N C 27699-1621
Test Initiation Date/Time 6/12/2018
% Eff
Control
Repi
Surviving #
Original #
Wt/onginal (mg)
11 25
Surviving #
Original #
Wt/original (mg)
22 5
Surviving #
Original #
Wt/original (mg)
45
Surviving #
Original #
Wt/onginal (mg)
67 5
Surviving #
Original #
Wt/original (mg)
90
Surviving #
Original #
Wt/original (mg)
Water Quality Data
Control
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlonne(mg/L)
Temp at Receipt (°C)
Dilution H2O Batch #
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
1
2
525PM
3
4
Avg Wt/Sury Control
10
10
10
10
10
10
10
10
0
706
0
590
0
720
0
606
10
9
10
10
10
10
10
10
0
637
0
647
0
664
0
621
10
10
10
10
10
10
10
10
0
679
0
683
0
652
0
644
10
10
9
9
10
10
10
10
0
486
0
619
0
631
0
603
10
10
10
10
10
10
10
10
0
627
0
668
0
670
0
623
10
10
10
10
10
10
10
10
0
669
0
659
0
699
0
711
Day
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
0 656
100 0
0 656
97 5
0 642
100 0
0 665
95 0
0 585
100 0
0 647
100 0
0 685
Test Organisms
i Cultured In -House
F. Outside Supplier
Hatch Date 6/11/18
Hatch Time 3 00 pm CT
0
1
2
3
814 /
773
815 /
765
810 /
778
820 /
825
821 /
792
820 /
789
814 /
783
7 85 /
6 59
7 60 /
5 93
7 85 /
6 67
7 66 /
7 89
8 09 /
7 74
8 29 /
7 18
7 86 /
7 14
246 /
251
241 /
243
246 /
250
241 /
245
241 /
247
243 /
244
245 /
245
0
1
2
3
4
7 81 /
7 98
7 89 /
8 02
7 77 /
8 07
7 88 /
8 34
8 26 /
8 27
8 30 /
8 12
8 02 /
8 48
802 /
659
770 /
627
810 /
667
766 /
806
813 /
792
822 /
708
785 /
793
25 1 /
24 7
24 4 /
24 5
24 9 /
24 2
24 6 /
24 9
25 2 /
24 9
24 4 /
25 0
25 0 /
24 2
1
2
3
6/11/2018
6/13/2018
6/14/2018
24 0
24 0
25 0
66
76
70
116
119
121
728
764
718
<01
<01
<01
17
16
07
1277
44
55
175
1278
1279
42
42
55
52
205
201
1280
44
51
198
Normal
Horn Var
NOEC
LOEC
ChV
Method
Survival
F"l
ri
90
>90
>90
Growth
lrl
Ii
90
>90
>90
Steel's Dunnett's
Overall Result
ChV
>100
Stats
Cone
11 25
22 5
45
67 5
90
Survival
Critical
10
10
10
10
10
Calculated
16
18
14
18
18
Growth
Critical Calculated
2 41 0 4396
241
241
241
241
-0 2986
2 3475
0 2820
-0 9622
DWO Form AT-5 /1/04)

7
Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test
Date 3/21/2019
Facility Sanford
Laboratory Mentech, Inc
Signature of Operato Re�spoj�
NPDES # NCO() 24147
Signature of Laboratory Supervisor
Pipe # 001 County Lee
Comments
MAIL ORIGINAL TO
Water Sciences Section
Aquatic Toxicology Bi anch
Division of Water Resources
1621 Mail Service Center
Raleigh, N C 27699-1621
Test Initiation Date/Time 3/12/2019
% Eff
Control
Repl
Surviving #
Original #
Wt/onginal (mg)
Surviving #
Original #
Wt/onginal (mg)
Surviving #
Original #
Wt/onginal (mg)
9 75
195
39
Surviving #
Original #
Wt/onginal (mg)
78
Surviving #
Onginal #
Wt/onginal (mg)
100
Surviving #
Original #
Wt/onginal (mg)
Water Quality Data
Control
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp at Receipt (°C)
Dilution H2O Batch #
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
1
2
535PM
3
4
Avg Wt/Sury Control
10
10
10
10
10
10
10
10
0
618
0
668
0
576
0
547
10
10
10
10
10
10
10
10
0
546
0
665
0
627
0
686
10
10
9
10
10
10
10
10
0
510
0
551
0
653
0
720
9
10
10
10
10
10
10
10
0
506
0
587
0
527
0
604
9
10
10
10
10
10
10
10
0
468
0
545
0
557
0
650
10
10
10
10
10
10
10
10
0
460
0
578
0
606
0
574
Day
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
0 602
100 0
0 602
100 0
0 631
97 5
0 609
97 5
0 556
97 5
0 555
100 0
0 555
Test Organisms
1' Cultured In -House
F Outside Supplier
Hatch Date 3/11/19
Hatch Time 3 00 pm CT
0
1
2
3
4
5
6
823 /
782
813 /
819
809 /
789
819 /
805
828 /
794
827 /
802
821 /
790
799 /
741
769 /
691
786 /
738
758 /
778
790 /
740
790 /
751
780 /
708
24 6 /
24 7
24 8 /
24 2
24 6 /
24 6
25 6 /
24 1
25 5 /
24 7
24 7 /
24 3
24 9 /
24 1
0
1
2
3
4
5
6
673 /
721
702 /
743
667 /
719
678 /
741
741 /
733
704 /
736
721 /
737
8 46 /
7 23
7 70 /
7 30
7 97 /
7 25
7 50 /
7 87
7 99 /
7 30
7 82 /
7 38
7 70 /
7 29
25 1 /
24 0
24 7 /
24 7
25 3 /
24 2
25 3 /
24 1
25 9 /
24 9
25 2 /
24 4
25 0 /
24 3
1
2
3
3/11/2019
3/13/2019
3/14/2019
24 0
24 0
25 0
48
58
60
20
16
19
490
562
574
<0 1
<0 1
<0 1
25
22
05
1373
44
57
211
1374
1375
44
44
50
54
187
201
1376
46
54
194
Normal
Hom Var
NOEC
LOEC
ChV
Method
Survival
11-1
100
>100
>100
Growth
Il
Pl
100
>100
>100
Steel's Dunnett's
Overall Result
ChV
>100
Stats
Conc
975
Survival
Critical
10
Calculated
18
Growth
Critical Calculated
241 -05988
19 5
10
16
2 41
-0 1302
39
10
16
2 41
0 9634
78
10
16
2 41
0 9842
100
10
18
2 41
0 9946
ninm Fnmi nT--g Puna)

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test
Date 12/23/2020
Facility Sanford
Laboratory Mentech, Inc
x 4101 A , ,. I) .,.
Signature of 0 erator Resp siblp9harie
x
NPDES # NCOO 24147
Signature of Laboratory Supervisor
P
ipe # 001 County Lee
Comments
MAIL ORIGINAL TO
Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N C 27699-1621
Test Initiation Date/Time 12/15/2020
Eff
Control
Repl
Surviving #
Original #
Wt/onginal (mg)
11 25
Surviving #
Original #
Wt/original (mg)
22 5
Surviving #
Original #
Wt/original (mg)
45
Surviving #
Original #
Wt/original (mg)
67 5
Surviving #
Original #
Wt/onginal (mg)
90
Surviving #
Original #
Wt/onginal (mg)
Water Quality Data
Control
pH (SU) inii/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) lnit/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp at Receipt (°C)
Dilution H2O Batch #
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
1
2
5 00 PM
3
4
Avg Wt/Sury Control
10
10
10
10
10
10
10
10
0
455
0
551
0
474
0
508
10
10
10
10
10
10
10
10
0
578
0
581
0
606
0
534
9
10
10
10
10
10
10
10
0
494
0
508
0
629
0
500
10
9
10
10
10
10
10
10
0
582
0
444
0
498
0
548
9
10
10
10
10
10
10
10
0
501
0
498
0
389
0
506
10
10
10
10
10
10
10
10
0
578
0
563
0
464
0
513
Day
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
0 497
100 0
I 0 497
100 0
0 575
97 5
0 533
97 5
0 518
97 5
0 474
100 0
0 530
Test Organisms
17 Cultured In -House
Fr Outside Supplier
Hatch Date 12/14/20
Hatch Time 3 00 pm CT
0
3
4
6
783 /
772
791 /
774
780 /
775
796 /
790
786 /
763
785 /
777
789 /
754
8 15 /
7 58
8 00 /
7 63
7 94 /
8 00
8 24 /
8 16
8 17 /
7 51
8 12 /
7 80
8 02 /
7 28
24 8 /
24 8
25 1 /
24 8
24 4 /
24 3
24 9 /
24 5
24 9 /
24 8
24 3 /
24 7
24 2 /
24 9
0
1
2
5
6
737 /
792
773 /
793
715 /
787
768 /
791
770 /
765
731 /
773
747 /
756
819 /
762
800 /
775
810 /
809
819 /
811
810 /
752
779 /
774
791 /
713
24 2 /
24 2
24 2 /
25 7
25 6 /
24 4
25 5 /
24 3
25 9 /
24 3
25 2 /
24 2
24 9 /
24 5
1
2
3
12/14/2020
12/16/2020
12/17/2020
24 0
24 0
25 0
58
54
54
62
47
38
504
397
366
<0 1
<01
<0 1
16
14
17
1528
46
30
170
1529
1530
44
44
34
30
168
162
1531
44
32
164
Normal
Hom Var
NOEC
LOEC
ChV
Method
Survival
f
n
90
>90
>90
Growth
Pi
1"I
90
>90
>90
Steel's Dunnett's
Overall Result
ChV
>90
Stats
Cone
11 25
22 5
45
67 5
90
Survival
Critical
10
10
10
10
10
Calculated
18
16
16
16
18
Growth
Critical Calculated
2 41 -2 1089
241
241
241
241
-0 9697
-0 5696
0 6374
-0 8816
DWQ Form AT-5 (1/04)

Effluent Toxicity Report Form -Chronic Fathead Minnow Multi -Concentration Test
Date 10/4/2021
Facility Sanford
x
Lab. ato Mentech, I
it��
nc
NPDES # NCO()24147
Signature of Operator in Responssiblliha :,ems/-E—mail/Phone Number
.
Signature of Laboratory Supervisor
pe # 001 County Lee
Comments
MAIL ORIGINAL TO
Water Sciences Section
Aquatic Toxicology Branch
Division of Water Resources
1621 Mail Service Center
Raleigh, N C 27699-1621
Test Initiation Date/Time 9/21/2021
% Eff
Control
Repl
Surviving #
Original #
Wt/original (mg)
Surviving #
Original #
Wt/onginal (mg)
Surviving #
Original #
Wt/original (mg)
11 25
22 5
45
Surviving #
Original #
Wt/original (mg)
67 5
Surviving #
Original #
Wt/original (mg)
90
Surviving #
Original #
Wt/original (mg)
Water Quality Data
Control
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
High Concentration
pH (SU) Init/Fin
DO (mg/L) Init/Fin
Temp (C) Init/Fin
Sample
Collection Start Date
Grab
Composite (Duration)
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
Chlorine(mg/L)
Temp at Receipt (°C)
Dilution H2O Batch #
Hardness (mg/L)
Alkalinity (mg/L)
Conductivity (umhos/cm)
1
2
453PM
3
4
Avg Wt/Sury Control
10
10
10
10
10
10
10
10
0
766
0
610
0
720
0
699
9
10
10
10
10
.10
10
10
0
569
0 480
0
785
0
734
10
10
10
9
10
10
10
10
0
610
0
747
0
676
0
742
10
10
10
10
10
10
10
10
0635
0711
0640
0610
9
10
10
10
10
10
10
10
0
563
0
628
0
534
0
603
10
10
10
9
10
10
10
10
0
697
0
657
0
656
0
576
Day
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
% Survival
Avg Wt (mg)
0 699
100 0
0 699
97 5
0 642
97 5
0 694
100 0
0 649
97 5
0 582
97 5
0 647
Test Organisms
r Cultured In -House
I_ Outside Supplier
Hatch Date 9/20/21
Hatch Time 4 00-5 oopm
0
1
2
3
4
5
6
779 /
753
741 /
780
759 /
756
779 /
775
782 /
781
785 /
769
789 /
775
776 /
736
768 /
767
766 /
705
781 /
759
779 /
800
820 /
745
792 /
733
246 /
240
242 /
246
241 /
240
241 /
243
241 /
243
241 /
245
246 /
240
0
1
2
3
4
5
6
739 /
787
752 /
793
742 /
786
743 /
799
781 /
802
782 /
779
752 /
787
7 97 /
7 04
7 76 /
7 59
7 59 /
7 30
7 68 /
7 49
7 70 /
7 96
8 20 /
7 08
8 06 /
7 40
24 4 /
24 0
24 5 /
25 0
25 1 /
24 0
24 6 /
24 1
25 0 /
24 6
24 7 /
24 6
25 0 /
24 3
1
2
3
9/20/2021
9/22/2021
9/23/2021
23 8
24 4
241
68
64
62
74
80
72
646
561
483
<0 1
<0 1
<0 1
11
09
13
1598
46
33
162
1599
1600
46
46
31
30
169
175
1601
44
32
168
Normal
Hom Var
NOEC
LOEC
ChV
Method
Survival
irI
ri
90
>90
>90
Growth
F)
Fl
90
>90
>90
Steel's Dunnett's
Overall Result
ChV
>90
Stats
Conc
1125
22 5
45
67 5
90
Survival
Critical
10
10
10
10
10
Calculated
16
16
18
16
16
Growth
Critical Calculated
2 41 1 0537
241
0 0928
2 41 0 9238
2 41 2 1678
2 41 0 9702

Tab G

Big Buffalo Wastewater Treatment Plant
Summary of Upstream Total Hardness Data
Date
Upstream Total Hardness
mg/L as CaCO,
6/1/2020
24.00
7/2/2020
30.00
8/3/2020
30.00
9/1/2020
30.00
10/5/2020
28.00
11/3/2020
36.00
12/9/2020
36.00
1/11/2021
26.00
2/1/2021
30.00
3/1/2021
30.00
4/5/2021
30.00
5/3/2021
33.00
6/1/2021
34.00
7/6/2021
28.00
8/2/2021
37.00
9/2/2021
32.00
10/1/2021
34.00
11/1/2021
39.00
12/2/2021
44.00

Tab H

Summary of Emerging Compounds (PFAs and 1,4-Dioxane)
Enter data ONLY in blue cells!
POTW Name: Big Buffalo Creek WWTP NPDES #:
NC0024147
Influent Grab (ng/L)
NC0024147
Influent Grab (ng/L)
CAS Number
Analyte Name
Acronym
7/8/2019
*
8/6/2019 * 9/4/2019
*
10/14/2019 * 10/17/2019
*
1/2/2020 * 2/14/2020
*
3/4/2020
*
4/2/2020
*
5/8/2020
*
6/1/2020
335-67-1
Perfluorooctanoic acid
PFOA
11.6
11.5
11
12.9
12.1
9.8
9.05
12.1
11.2
9.82
11.7
1763-23-1
Perfluorooctanesulfonic acid
PFOS
46.3
40.8
1000
24.9
30.5
10.4
14.7
16.5
21.5
23.5
13.6
375-22-4
Perfluorobutanoic acid
PFBA
12.1
15.4
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-73-5
Perfluorobutanesulfonic acid
PFBS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
335-77-3
Perfluorodecanesulfonic acid
PFDS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
335-76-2
Perfluorodecanoic acid
PFDA
1.86
1.85
ND
U
2.56
2.34
1.21
0.750
0.776
1
ND
U
0.651
0.906
307-55-1
Perfluorododecanoic acid
PFDoA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-92-8
Perfluoroheptanesulfonic acid
PFHpS
ND18.8
ND
U
16.6
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-85-9
Perfluoroheptanoic acid
PFHpA
ND
U
77.5
122
34.4
80.9
12
10.5
23.5
21.9
U
12.4
7.04
355-46-4
Perfluorohexanesulfonic acid
PFHxS
31.9
6.38
21.3
ND
U
ND
U
ND
U
4.71
8.33
8.3
U
8.12
5.83
307-24-4
Perfluorohexanoic acid
PFHxA
ND
U
44.2
61.8
60.6
62.3
ND
U
13.2
20.8
19.9
U
22.3
13.6
68259-12-1
Perfluorononanesulfonic acid
PFNS
2.51
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-95-1
Perfluorononanoic acid
PFNA
ND
U
2.25
2.07
2.36
2.05
1.64
1.38
1.71
ND
U
1.1
2.12
754-91-6
Perfluorooctanesulfonamide
PFOSA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2991-50-6
2-(N-Ethylperfluorooctanesulfonamido) acetic acid
N-EtFOSAA
ND
U
0.134
1
ND
U
ND
U
ND
U
ND
U
0.0698
J
ND
U
ND
U
ND
U
ND
U
2355-31-9
2-(N-Methylperfluorooctanesulfonamido) acetic acid
N-MeFOSAA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2706-91-4
Perfluoropentanesulfonic acid
PFPeS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2706-90-3
Perfluoropentanoic acid
PFPeA
50.8
75.7
130
ND
U
96.3
ND
U
ND
U
54.7
ND
U
ND
U
56.9
376-06-7
Perfluorotetradecanoic acid
PFTeA
ND
U
0.239
1
ND
U
ND
U
ND
U
ND
U
0.0935
J
ND
U
ND
U
ND
U
ND
U
72629-94-8
Perfluorotridecanoic acid
PFTriA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2058-94-8
Perfluoroundecanoic acid
PFUnA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
0.165
1
757124-72-4
4:2 Fluorotelomer sulfonate
4:2 FTS
ND
U
1.25
1
6.86
ND
U
3.13
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
27619-97-2
6:2 Fluorotelomer sulfonate
6:2 FTS
80
ND
U
2650
9.39
931
23
519
2580
1840
ND
U
18.1
39108-34-4
8:2 Fluorotelomer sulfonate
8:2 FTS
1.78
6.09
4.68
ND
U
1.7
0.396
0.309
0.291
1
ND
U
1.61
ND
U
62037-80-3
Gen-X
HFPO-DA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
Sum of PFOA and PFOS
57.9
52.3
1011
37.8
42.6
20.2
23.75
28.6
32.7
33.32
25.3
Total
238.85
283.293
4026.31
147.11
1222.32
58.446
573.7623
2718.707
1922.8
79.501
129.961
1=The reported result is an estimate. The value is less than the minlmum calibration level but greater that the Estimated Detec
U =The analyte was not detected. The estimated Detection Limit(EDL) may be reported for this analyte.
ND=Indicates a Non -Detect
on Limit (EDL).
Influent Grab (ug/L)
7/8/2019
*
8/6/2019
*
9/4/2019
*
*
*
1/2/2020
*
2/14/2020
*� 3/4/2020
•
4/2/2020
*
5/8/2020
*
6/1/2020
1, 4 -Dioxane
2.91
4.67
13.2
< 1.0
< 1.00
1.64
I
I 2.8
I
I 1.18
I
I < 1.00
* Please enter applicable lab qualifiers
Enter data ONLY in blue cells!
POTW Name: Big Buffalo Creek WWTP NPDES #:
NC0024147
Effluent Grab (ng/L)
CAS Number
Analyte Name
Acronym
1/2/2020
1/17/2020
*
2/14/2020
*
3/4/2020
*
4/2/2020 *
5/8/2020
*
6/1/2020
335-67-1
Perfluorooctanoic acid
PFOA
11.2
10.0
9.23
14.9
15.2
12.4
13.8
1763-23-1
Perfluorooctanesulfonic acid
PFOS
12.2
14.0
IR
7.40
9.01
11.3
14.3
13.8
375-22-4
Perfluorobutanoic acid
PFBA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-73-5
Perfluorobutanesulfonic acid
PFBS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
335-77-3
Perfluorodecanesulfonic acid
PFDS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
335-76-2
Perfluorodecanoic acid
PFDA
ND
U
0.920
1-IR
0.713
0.631
J
0.606
1.01
1.28
307-55-1
Perfluorododecanoic acid
PFDoA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-92-8
Perfluoroheptanesulfonic acid
PFHpS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
0.29
375-85-9
Perfluoroheptanoic acid
PFHpA
14.3
37.7
30.6
41.3
75.7
33.1
25.2
355-46-4
Perfluorohexanesulfonic acid
PFHxS
ND
U
ND
U
ND
U
5.51
5.35
4.16
5.25
307-24-4
Perfluorohexanoic acid
PFHxA
ND
U
56.5
36.7
48.6
70.8
45.0
39.2
68259-12-1
Perfluorononanesulfonic acid
PFNS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
375-95-1
Perfluorononanoic acid
PFNA
1.47
1.44
1.43
1.61
1.47
1.32
1.62
754-91-6
Perfluorooctanesulfonamide
PFOSA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2991-50-6
2-(N-Ethylperfluorooctanesulfonamido) acetic acid
N-EtFOSAA
ND
U
0.408
1
0.250
0.0625
J
ND
U
0.0943
1
0.317
2355-31-9
2-(N-Methylperfluorooctanesulfonamido) acetic acid
N-MeFOSAA
ND
U
ND
U
0.661
0.357
J
ND
U
ND
U
0.465
2706-91-4
Perfluoropentanesulfonic acid
PFPeS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
1.15
2706-90-3
Perfluoropentanoic acid
PFPeA
ND
U
ND
U
ND
U
119
114
ND
U
43.1
376-06-7
Perfluorotetradecanoic acid
PFTeA
ND
U
ND
U-IR
ND
U
ND
U
ND
U
ND
U
ND
U
72629-94-8
Perfluorotridecanoic acid
PFTriA
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
2058-94-8
Perfluoroundecanoic acid
PFUnA
ND
U
ND
U
0.0546
J
ND
U
ND
U
ND
U
ND
U
757124-72-4
4:2 Fluorotelomer sulfonate
4:2 FTS
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
ND
U
27619-97-2
6:2 Fluorotelomer sulfonate
6:2 FTS
23
124
107
32.8
105
82.1
29.4
39108-34-4
8:2 Fluorotelomer sulfonate
8:2 FTS
ND
U
0.164
J
0.0789
J
0.0815
J
ND
U
ND
U
ND
U
62037-80-3
Gen-X
HFPO-DA
ND
U
ND
U
ND
U
ND
U
ND
U
2.63
0.321
Sum of PFOA and PFOS
23.4
24
16.63
23.91
26.5
0
26.7
27.6
0
Total
62.17
245.132
194.1175
273.862
399.426
0
196.1143
175.193
0
J =The reported result is an estimate. The value is less than the minlmum calibration level but greater that the Estimated Detec
U =The analyte was not detected. The estimated Detection Limit(EDL) may be reported for this analyte.
ND=Indicates a Non -Detect
on Limit (EDL).
Effluent Grab (ug/L)
1/2/2020
1/23/2020
2/14/2020
*
3/4/2020
*
4/2/2020
*
5/8/2020
*
6/1/2020
*
•
1,4-Dioxane I
1.64
<1.00
<1.00
2.43
2.41
1.41
<1.00

Tab l

Haze
Hazen and Sawyer
4011 WestChase Blvd, Suite 500
Raleigh, NC 27607 • 919.833.7152
Firm License No. C-0381
TECHNICAL MEMORANDUM
To:
Scott A. Siletzky
City of Sanford
From:
Hazen and Sawyer
Date:
February 11, 2022
Copies:
Subject:
Reduction of Monitoring Frequency Analysis
Big Buffalo Wastewater Treatment Plant NPDES Permit No. NC0024147
In support of the National Pollutant Discharge Elimination System (NPDES) permit renewal, a monitoring
frequency reduction analysis was conducted on the Big Buffalo Wastewater Treatment Plant (WWTP)
Discharge Monitoring Report (DMR) data from January 2019 through December 2021. The City of Sanford
would like to formally request a reduction in the monitoring frequency for biochemical oxygen demand
(BOD5), total suspended solids (TSS), ammonia, and fecal coliform as allowed by the Division of Water
Resources (DWR) for "Exceptionally Performing Facilities."
This analysis was performed in accordance with DWR's guidance document, Reduction of Monitoring
Frequencies in NPDES Permits for Exceptionally Performing Facilities (October 2012). Per DWR
guidance, the following criteria have been met by the City of Sanford:
• The Big Buffalo WWTP has not had any civil penalty assessments for permit limit
violations for either BOD5, TSS, ammonia, or fecal coliform.
• The City of Sanford and city employees have not been convicted of any criminal
violations of the Clean Water Act.
• The Big Buffalo WWTP is not currently under a Special Order by Consent (SOC).
• The Big Buffalo WWTP is not on the Environmental Protection Agency (EPA) Quarterly
Noncompliance Report for BOD5, TSS, ammonia, or fecal coliform.
Table 1 provides a summary of the data from January 2019 through December 2021 that supports a
reduction in the monitoring frequency for BOD5, TSS, ammonia, and fecal coliform. The three-year
arithmetic mean of effluent data is less than 50 percent of the permit limit for BOD5, TSS, and ammonia.
Sampling results for BOD5, TSS, and ammonia that are greater than 200 percent of the monthly average
permit limits have been provided in Table 1. Less than fifteen (15) BOD5, TSS, or ammonia samples have
been over 200% of monthly average permit limit. It should be noted that the statistical analysis for fecal
coliform is tabulated based on the IDEXX Colilert®-18/Quanti-Tray method, which uses units of Most
Probable Number (MPN) per 100 mL. The three-year geometric mean was calculated for this dataset and
is included in the attached supporting documentation. Only six (6) fecal coliform effluent sampling results
are over 200% of weekly average limit for fecal coliform.
Page: 1/2

Hazen
The Big Buffalo WWTP has met the monitoring requirements to be categorized as an Exceptionally
Performing Facility per DWR guidance and is eligible for a reduction in the monitoring frequency of BOD5,
TSS, ammonia, and fecal coliform. The Excel Spreadsheet, NPDES Permit NC0024147 MRF.xis, contains
data for the monitoring reduction frequency analysis.
Table 1: Summary of Monitoring Frequency Reduction Analysis for Big Buffalo WWTP
Approval Criteria 1 2
3-year average
Number of data points
Monthly average permit limit
Percent of permit limit
Number of samples over
200% of monthly average
permit limit
Number of samples over
200% of weekly average
permit limit
Data in compliance with DWR
Guidance?
BOD5
2.43 (winter)
2.07 (summer)
321
9.2 (winter)
5 (summer)
26% (winter)
41% (summer)
2 (winter)
0 (summer)
Yes
Ammonia
0.17 (winter)
0.09 (summer)
742
1.1 (winter)
1 (summer)
15% (winter)
9% (summer)
3 (winter)
2 (summer)
TSS
2.30
318
30 200
8% 6%
2
Fecal Coliform 3
12.84
315
6
Yes Yes Yes
Per Division of Water Resources Guidance Regarding the Reduction of Monitoring Frequencies in NPDES
Permits for Exceptionally Performing Facilities, October 2012.
2 Analysis is representative of data from January 2019 through December 2021.
3 Data from January 2019 through December 2021 using IDEXX Colilert®-18/Quanti-Tray method (MPN/100mL).
Page: 2/2