NC0025542_Fact Sheet_20210526

Fact Sheet
NPDES Permit No. NC0025542
Permit Writer / Email Contact: Diana Yitbarek / [e-mail]
Date: 5/26/2021
Division/Unit: NC DEQ Division of Water Resources / NPDES Municipal Permitting Unit
Fact Sheet Template: Version 1/9/2017
Permitting Action:
❑X Renewal
❑ Renewal with Expansion
❑ New Discharge
❑ Modification (Fact Sheet should be tailored to mod request)
Note: A complete application should include the following:
• For New Dischargers, EPA Form 2A or 2D requirements, Engineering Alternatives Analysis, Fee
• For Existing Dischargers (POTW), EPA Form 2A, three effluent pollutant scans, four 2nd species WET tests.
• For Existing Dischargers (Non-POTW), EPA Form 2C with correct analytical requirements based on industry
category.
Complete applicable sections below. If not applicable, enter NA
1. Basic Facility Information
Table 1. Facility Information
Facility Information
Applicant/Facility Name:
City of Hickory/ Hickory - Catawba Wastewater Treatment Plant (WWTP)
Applicant Address:
PO Box 398, Hickory, N.C. 28603
Facility Address:
104 6th Avenue NE, Catawba, NC 28609
Permitted Discharge Flow:
1.5/3 0 million gallons per day (MGD)
Facility Type/Waste:
Major Municipal/ Domestic
Facility Class:
Class III (1.5 MGD)/ Class IV (3.0 MGD) Biological - 15A NCAC 08G .0302
Treatment Units:
Mechanical bar screening and grit removal structures, two oxidation ditches,
two secondary clarifiers, four tertiary filters, chlorine contact basin,
dechlorination, cascade aerator, sludge pump station, and two sludge holding
tanks
Pretreatment Program
(Y/N/Inactive)
Inactive
County:
Catawba
Region:
Mooresville Regional Office (MRO)
Permitting Action: The City of Hickory (City) applied for NPDES permit renewal for Hickory -Catawba WWTP
in January 2020. The WWTP has a design capacity of 1.5 MGD and is currently authorized to discharge 1.5 MGD
(up to 3.0 MGD upon obtaining authorizations) into Lyle Creek, a class WS-IV, critical area (CA) waters. The
Page 1 of 16

class WS-IV denotes use as a source of water supply for drinking, culinary, or food processing purposes. The
Hickory -Catawba Creek WWTP (Facility) serves about 3500 customers within the Town of Catawba and in the
Southeast area of the Catawba County. The pretreatment program is inactive. Per February 22, 2021, City's email,
there are no significant industrial users (SIUs) in the Facility's service area.
October 30, 2019, City's cover letter for renewal application requests reducing monitoring for this Facility per
2012 DWQ Guidance Regarding the Reduction of Monitoring Frequencies in NPDES Permits for Exceptionally
Performing Facilities. February 22, 2021, City's email, clarifies the requested parameters to reduce monitoring;
BOD, TSS, NH3/N, and Fecal Coliform. These requests are addressed below in this fact sheet.
Facility Background: When the City purchased the Facility in 2003, the capacity of the plant was 0.225 MGD. In
2010, the City requested modification and expansion of the plant to 1.5 MGD (phase I) and 3.0 MGD (phase II).
The old facility was demolished, and phase I expansion was completed in August 2015. At the present time, this
fact sheet assessment is based on a wastewater plant flow of 1.5 MGD.
2. Receiving Waterbody Information:
Table 2. Receivin Waterbodv Information
Outfalls/Receiving Stream(s):
Outfall 001 [35°42'55.3"N 81°04'25.8"W]/Lyle Creek
Stream Segment/Assessment
Unit (AU):
11-76-(4.5)
Stream Classification:
WS-IV, CA
Drainage Area (mi2):
72.8*
Summer 7Q10 (cfs)
13*
Winter 7Q10 (cfs):
19*
30Q2 (cfs):
27.62*
Average Flow (cfs):
80*
Instream Waste Concentration
(IWC) (% effluent):
15 % at 1.5 MGD (7Q10S)
26 % at 3.0 MGD (7Q10S)
303(d) listed/parameter:
No
Subject to TMDL/parameter:
Yes/Mercury Statewide TMDL implemented in 2012
Basin/Sub-basin/ Hydrologic unit
code (HUC):
Catawba River Basin/03-08-32/03050101
USGS Topo Quad/State Grid:
Catawba/E14NE
*Statistical data taken from the previous fact sheet per Division's guideline.
Lyle Creek is a little over 20 miles in total length and is split into three segments. The creek begins in the City of
Hickory, flows east through the City of Conover and into Lake Norman at the Town of Catawba. Between the
municipalities, the creek drains agricultural land. Since 1992, the biological community has been stable but of
moderate quality. The benthic site had the highest specific conductivity level (122 µS/cm) of any other site in this
and surrounding watersheds in 2007. For more information, see the 2010 Catawba River Basinwide Water Quality
Plan.
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3. Effluent Data Summary
Effluent data for Outfall 001 is summarized below from June 2016 through December 2020.
Table 3. Effluent Data Summary with permit limits Outfall 001. Parameters listed as in the last permit.
Parameter
Units
Average
Max.
Min.
Permit Limit
Flow
MGD
0.08
0.87
0.02
MA 1.5 MGD
BOD5
mg/1
2.5
14
2.0
MA 10.0 mg/I
WA 15.0 mg/I
NH3N
mg/1
0.70
10.3
0.01
MA 2.0 mg/I
WA 6.0 mg/I
Total Suspended
Solids (TSS)
mg/1
3.7
30.0
2.5
MA 30.0 mg/I
45.0 mg/I
Dissolved Oxygen
(DO)
mg/17.9
15.10
5.10
DA >_ 5.0 mg/I
Fecal Coliform
#/100 ml
2.06
(Geomean)
3600.00
1.00
MA 200/100m1
WA 400/100m1
pH
SU
6.9
9.0
6.0
6.0 < pH < 9.0
Total Residual
Chlorine (TRC)
µg/1
20
20
20
DM 28.00 pg/I
Temperature
°C
18.5
29
3.7
Total Zinc
µg/1
70.1
430.0
27.8
Bis (2-Ethylhexyl)
Phthalate
µg/l
5.25
9.20
4.90
Total Hardness [as
CaCO3]
m n
g
47.5
66.3
37.2
Total Nitrogen (TN)
mg/1
4.9
14.0
0.73
Total Phosphorus
(TP)
mg/11.72
5.20
0.12
*MA -Monthly Average, WA -Weekly Average, DM -Daily Maximum, DA=Daily Average.
Table 4 Summary of Conductivity values from May 2016 to October 2016 at Outfall 001
Parameter
Units
Average
Max
Min.
Conductivity
µmho/cm
541.6
1209.0
55.0
Table 5. Effluent Data Summary from expanded effluent pollutant scan at Outfall 001
Parameter
Units
Average
Max.
Chloroform
µg/1
37.9
78.5
Copper
µg/1
17.5
24
Dichlorobromomethane
1.1g/1
7.5
17.8
Lead
µg/1
0.15
0.15
Methyl Bromide
µg/1
4.4
11.7
Mercury*
ng/1
2.9
5.5
*See section 6.6 Mercury Statewide Total Maximum Daily Load (TMDL) Evaluation
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Sample results for the sampled metals not included above, such as antimony, arsenic, beryllium, cadmium,
chromium, cyanide, nickel, selenium, silver, and thallium, were less than the method detection limit. The
compounds in the above table were analyzed in the reasonable potential analysis (RPA) and discussed below
in the RPA section of this fact sheet.
Given the former conductivity results (>1000 µmho/cm) and the results from the expanded effluent pollutant
scan, the reissued permit will include a condition to conduct an industrial waste survey (IWS) to identity and
control potential pollutant sources.
4. Instream Data Summary
Instream monitoring may be required in certain situations, for example, 1) to verify model predictions when
model results for instream DO are within 1 mg/1 of instream standard at full permitted flow; 2) to verify model
predictions for outfall diffuser; 3) to provide data for future total maximum daily load (TMDL); 4) based on
other instream concerns. Instream monitoring may be conducted by the Permittee, and there are also
Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee (in which
case instream monitoring is waived in the permit as long as coalition membership is maintained).
Instream data summary and instream monitoring proposed for this permit action:
1. The current permit requires instream [upstream (U) and downstream (D)] monitoring for dissolved oxygen
(DO), temperature, total nitrogen, total phosphorous, and chlorophyll A. Monitoring of upstream hardness
is required as well. The U sampling location is at Highway 10, about 1000 feet from the outfall. The D
sampling location is at Marina off Canvasback Ln, about 4000 feet from the outfall.
Instream monitoring requirements for total nitrogen, total phosphorous, and chlorophyll A were added per the
recommendation of the Modeling and Assessment Branch. Catawba River Nutrient Management Strategy
requires limiting nutrients from any expanding discharger to avoid potential over -allocation in Lake Norman. The
facility started conducting instream sampling for total nitrogen, total phosphorous and chlorophyll A after
expansion to 1.5 MGD. The figures below summarizes instream and effluent (Eff) data from the analyzed period,
September 2016 - September 2020.
Figure 1. Average, maximum, and minimum instream and effluent data summary for T, DO, TN, and TP
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Temperature, C
Upstream
Effluent
Downstream
■ Average
17.9
18.5
19.6
• Max
27.0
29.0
28.0
• Min
0.0
3.7
2.8
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
DO, mg/I
Upstream
Effluent
Downstream
■ Average
7.4
8.0
6.8
• Max
15.4
15.1
15.9
• Min
1.4
5.1
1.4
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35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Total Nitrogen, mg/I Total Phosphorus, mg/I
Upstream
Effluent
Downstream
■ Average
1.3
7.3
1.0
• Max
4.6
30.0
7.3
• Min
0.3
0.9
0.2
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Upstream
Effluent
AL
Downstream
■ Average
0.3
2.8
0.3
• Max
0.7
6.4
1.4
• Min
0.3
0.3
0.3
T-tests were run to analyze relationships between instream sample results. A statistically significant difference
is determined when the t-test p-value result is < 0.05.
Temperature: The maximum downstream temperature was 28 degrees Celsius, and the maximum temperature
differential between the upstream and downstream samples was seven degrees Celsius. It was concluded that
there is a statistically significant difference between the upstream and downstream temperatures.
DO: The minimum downstream DO detected was 1.4 mg/1 on 9/21/2016, and the maximum DO differential
between the upstream and downstream samples was 10.7 mg/1. The downstream and upstream DO were detected
below 5.0 mg/1 57 and 19 times, respectively. It was concluded that there is a statistically significant difference
between upstream and downstream DO.
Total Nitrogen (TN): The maximum downstream TN detected was 7.3 mg/1. It was concluded that there is a
statistically significant difference between upstream and downstream TN.
Total Phosphorous (TP): The maximum downstream TP detected was 1.4 mg/1. It was concluded that there is
no statistically significant difference between upstream and downstream TP.
Figure 2. Average, maximum, and minimum upstream and downstream data summary for Chlorophyll A
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Chlorophyll A, µg/I
1
Upstream
Downstream
■ Average
8.5
9.3
• Max
14.4
14.9
• Min
2.0
2.0
Chlorophyll A: The maximum downstream chlorophyll A detected was 1.4 mg/l. It was concluded that there is
a statistically significant difference between upstream and downstream chlorophyll A.
The nutrient and chlorophyll A data collected provide useful information for nutrient criteria development.
Page 5 of 16

Figure 3. Average, maximum, and minimum instream and effluent data summary for Fecal Coliform
7000.0
6000.0
5000.0
4000.0
3000.0
2000.0
1000.0
0.0
Fecal Coliform, #/100 ml
Upstream
Effluent
Downstream
• GeoMean
442.5
2.1
452.6
• Max
6000.0
3600.0
6000.0
• Min
88.0
1.0
11.0
Instream monitoring for fecal coliform was removed in the previous permit cycle, 2016, as the receiving body is
not listed as impaired for fecal coliform. The Permittee has voluntarily collected instream fecal coliform samples.
Fecal Coliform: The maximum upstream and downstream fecal coliform detected was 6000/100 ml. The
maximum effluent fecal coliform detected was 3600/100 ml. After running the T-test, it was concluded that there
is no statistically significant difference between upstream and downstream fecal coliform.
Hardness: Effluent hardness and instream hardness sampling, upstream of the discharge are being sampled at a
monitoring frequency of quarterly.
Is this facility a member of a Monitoring Coalition with waived instream monitoring (Y/N): N
Name of Monitoring Coalition: NA
5. Compliance Summary
From January 2016 to January 2021, the Facility received a total of five notices of violation (NOVs) for
exceeding monthly average (MA) and weekly average (WA) limits for ammonia and not reaching the daily
minimum (Dmin) for DO. The Facility also received six Enforcement Cases for exceeding MA and WA limits
for ammonia. The MRO representative, Wes Bell, is working with the Facility to monitor the Facility's
compliance performance. The report on limit violations that proceeded to NOV or Enforcement Case were as
follows:
• Ammonia - 6 MA limit exceedances and 4 WA limit exceedances. The maximum MA limit exceedance
was 5.2 mg/1 and the maximum WA limit exceedance was 8.9 mg/1, both in 2020.
• DO - 1 Dmin not reached in 2017.
Summary of the compliance record with aquatic toxicity test limits and any second species test results (past 5
years): The Facility passed seventeen of eighteen quarterly chronic toxicity tests from February 2016 to May
2020. February 2017 test failed, therefore multiple -concentration testing were performed in each of the two
following months (March and April 2017) as described in North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure. The results of these follow-up tests were acceptable. The Facility complied with all 2nd
species WET tests. The four 2nd species tests were performed in November 2018, February 2019, May 2019,
and August 2019.
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Summary of the results from the most recent compliance inspection:
The last facility inspection conducted in January 2021 by Wes Bell rated the facility as very reliable and
reported one compliance issue regarding the influent sampling. The ORC and staff are aware and are looking
for a new influent sampling location above all side streams.
6. Water Quality -Based Effluent Limitations (WQBELs)
6.1 Dilution and Mixing Zones
In accordance with 15A NCAC 2B.0206, the following stream flows are used for dilution considerations for
development of WQBELs: 1Q10 streamflow (acute Aquatic Life); 7Q10 streamflow (chronic Aquatic Life;
non -carcinogen HH); 30Q2 streamflow (aesthetics); annual average flow (carcinogen, HH).
Stream flow values were extracted from the previous fact sheets (2010 and 2015). In 2010, the 7Q10 and
average annual flow were updated.
If applicable, describe any other dilution factors considered (e.g., based on CORMIX model results): NA
If applicable, describe any mixing zones established in accordance with 15A NCAC 2B. 0204(b): NA
6.2 Oxygen -Consuming Waste Limitations
Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to ensure
protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits (e.g., BOD=
30 mg/1 for Municipals) may be appropriate if deemed more stringent based on dilution and model results.
If permit limits are more stringent than TBELs, describe how limits were developed:
The current permit limits for BOD are based on a Water Quality Analysis Simulation Program (WASP) model
run for the proposed wasteflow of 3.0 MGD in 2007. The model and its documentation were reviewed by
DWQ's Modeling and TMDL Unit (MTU), and a technical memorandum were submitted in May 2008. It was
determined that based on the model results for a 3.0 MGD flow that limits consistent with tertiary treatment and
effluent aeration is the most viable option for consideration of an expansion of discharge into Lyle Creek. With
the issuance of speculative limits, it was recommended that frequent monitoring be required downstream of the
discharge to ensure that DO levels do not fall below 5.0 mg/1. No changes for DO nor BOD are proposed for
this permit cycle.
6.3 Ammonia and Total Residual Chlorine Limitations
Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of 1.0
mg/1 (summer) and 1.8 mg/1 (winter). Acute ammonia limits are derived from chronic criteria, utilizing a
multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals.
Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection of
aquatic life (17 ug/1) and capped at 28 ug/1 (acute impacts). Due to analytical issues, all TRC values reported
below 50 ug/1 are considered compliant with their permit limit.
Describe any proposed changes to ammonia and/or TRC limits for this permit renewal:
Ammonia: There are no proposed changes for ammonia. The current permit sets MA (2.0 mg/1) and WA (6.0
mg/1) limits for ammonia for the 1.5 MGD flow tier, and sets summer and winter MA and WA limits for
ammonia for the 3.0 MGD flow tier [summer, MA (1.0 mg/1) and WA (3.0 mg/1) and winter MA (2.0 mg/1) and
WA (6.0 mg/1)]. In previous permit cycles a WASP model indicated that BOD5 and NH3 had been over
allocated in Lyle Creek under prior wasteload allocation (WLA) procedures. The modeling was done to
Page 7 of 16

establish NPDES permit limits for the Town of Conover WWTP (discharging upstream of Catawba) to protect
the DO standard and was used to guide recommendation for future expansions and new facilities in the Lyle
Creek watershed. Expanding facilities in the Lyle Creek watershed received and will receive BOD and NH3
limits that will hold their load of oxygen consuming waste constant. WASP model results predicted that at 3.0
MGD limits of BOD5 = 5 mg/1 and NH3 = 2 mg/1 would protect dissolved oxygen in Lyle Creek. The limits at
1.5 MGD would be year round limits with no differentiation during the summer and winter months. The
ammonia limits will be the same as the previous permit cycle.
With this permit renewal, the City requested monitoring frequency reduction for ammonia. Upon performing
the monitoring reduction in frequency evaluation from a period of three years (12/2017 to 12/2020), this
facility has received four non -monthly average limit violations in the past year for ammonia; therefore, this
facility does not meet the approval criteria for monitoring reduction for ammonia
TRC: The facility uses chlorination as its primary disinfection. The current permit limits TRC at 28 ug/L as a
daily maximum for 1.5 and 3.0 MGD. The facility is considered compliant with its permit since all reported
values were 20 ug/L. The Division recommends verifying equipment calibration protocols. No changes are
proposed for TRC
6.4 Reasonable Potential Analysis (RPA) for Toxicants
The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC RPA
procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero background;
3) use of Y2 detection limit for "less than" values; and 4) stream flows used for dilution consideration based on
15A NCAC 2B.0206. Effective April 6, 2016, NC began implementation of dissolved metals criteria in the RPA
process in accordance with guidance titled NPDES Implementation oflnstream Dissolved Metals Standards,
dated June 10, 2016.
The RPAs were conducted for permitted flows of 1.5 MGD and 3.0 MGD with a 7Q10S of 13 cubic feet per
second (cfs) and site -specific hardness values on the effluent toxicant data collected in the Permittee's 2016 to
2020 effluent pollutant scans and DMRs. Pollutants of concern included toxicants with positive detections and
associated water quality standards/criteria. The data set was limited for arsenic, beryllium, cadmium, chromium,
cyanide, lead, nickel, selenium, silver, chloroform, methyl bromide, and dichlorobromomethane. Based on this
analysis, the following permitting actions are proposed for this permit:
• Effluent Limit with Monitoring. The following parameters will receive a water quality -based effluent
limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable water quality
standards/criteria:
For the 3.0 MGD flow tier: Bis(2-ethylhexyl) phthalate
• Monitoring Only. The following parameters will receive a monitor -only requirement since they did
not demonstrate reasonable potential to exceed applicable water quality standards/criteria, but the
maximum predicted concentration was >50% of the allowable concentration:
For 1.5 MGD: Zinc, copper , bis(2-ethylhexyl) phthalate, and dichlorobromomethane (based on a
limited dataset. No value exceeded the Allowable discharge concentration)
For 3.0 MGD: Zinc, copper
• No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since they
did not demonstrate reasonable potential to exceed applicable water quality standards/criteria and the
maximum predicted concentration was <50% of the allowable concentration: Antimony, arsenic,
beryllium, cadmium, chromium, cobalt, lead, molybdenum, nickel, silver, selenium, tin, titanium,
vanadium, and total phenolic compounds.
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• POTW Effluent Pollutant Scan Review: Five effluent pollutant scans were evaluated for additional
pollutants of concern.
o The following parameter(s) will receive a water quality -based effluent limit (WQBEL) with
monitoring, since as part of a limited data set, two samples exceeded the allowable discharge
concentration:
For 1.5 MGD: Methyl bromide
For 3.0 MGD: Methyl bromide and dichlorobromomethane
o The following parameter(s) will receive a monitor -only requirement, since as part of a limited
data set, one sample exceeded the allowable discharge concentration: NA
• Additional notes:
o Silver: The City of Hickory reported total silver at less than detection, with detection levels of
< 5.0 µg/L and < 0.5 µg/L, in the Effluent Pollutant Scans. Based on the RPA, the City's total
silver allowable discharge concentrations are 0.395 µg/L for 1.5 MGD and 0.228 µg/L for 3.0
MGD.
15A NCAC 2B .0505 (e) (4) requires that all test procedures must produce detection and
reporting levels that are below the permit discharge requirements, and all data generated must
be reported to the approved detection level or lower reporting level of the procedure. If no
approved methods can achieve a detection level below the permit discharge requirement
(or allowable discharge concentration) the method with the lowest detection level must be
used. The City should use sufficiently sensitive test methods for all pollutants, including when
performing Effluent Pollutant Scans. Failure to use the lowest silver detection value may
result in the inclusion of effluent monitoring for silver at the next permit renewal.
6.5 Toxicity Testing Limitations
Permit limits and monitoring requirements for Whole Effluent Toxicity (WET) have been established in
accordance with Division guidance (per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits issued
to Major facilities or any facility discharging "complex" wastewater (contains anything other than domestic
waste) will contain appropriate WET limits and monitoring requirements, with several exceptions. The State
has received prior EPA approval to use an Alternative WET Test Procedure in NPDES permits, using single
concentration screening tests, with multiple dilution follow-up upon a test failure.
Describe proposed toxicity test requirement: This is a Major Publicly Owned Treatment Work (POTW), and a
chronic WET limit will continue on a quarterly frequency at Outfall 001 at 15% at 1.5 MGD using
Ceriodaphnia dubia. For the 3.0 MGD flow tier, a quarterly chronic WET limit would apply at 26% effluent
concentration, using Ceriodaphnia dubia, as well.
6.6 Mercury Statewide Total Maximum Daily Load (TMDL) Evaluation
There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply with
EPA's mercury fish tissue criteria (0.3 mg/kg) for human health protection. The TMDL established a wasteload
allocation for point sources of 37 kg/year (81 lb/year) and is applicable to municipals and industrial facilities
with known mercury discharges. Given the small contribution of mercury from point sources (-2% of total
load), the TMDL emphasizes mercury minimization plans (MMPs) for point source control. Municipal
facilities > 2 MGD and discharging multiple quantifiable levels of mercury (>1 ng/1) received an MMP
requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a pollutant of concern.
Effluent limits may also be added if annual average effluent concentrations exceed the WQBEL value (based on
the NC WQS of 12 ng/1) and/or if any individual value exceeds a TBEL value of 47 ng/1.
A mercury evaluation was conducted in accordance with the Permitting Guidance developed for the
implementation of the statewide Mercury TMDL to determine the need for a limit. Below find summaries of
Page 9 of 16

compliance mercury data from 2016 to 2020. Based on the dataset, the water quality -based effluent limitation
(WQBEL) for mercury is 79.1 and 45.5 ng/1 for 1.5 MGD and 3.0 MGD.
Table 6. Mercury Effluent Data Summary - 1.5 MGD
2016
2017
2018
2019
2020
# of Samples
1
1
2
2
Mercury Annual Average (ng/1)
2.3
3.4
3.0
1.29
1.77
Mercury Annual Max (ng/1)
2.29
3.37
3.18
1.695
1.77
TBEL (ng/1)
47
WQBEL (ng/1)
79.1
Table 7. Mercury Effluent Data Summary - 3.0 MGD
2016
2017
2018
2019
2020
# of Samples
1
1
2
2
1
Mercury Annual Average (ng/1)
2.3
3.4
3.0
1.29
1.77
Mercury Annual Max (ng/1)
2.29
3.37
3.18
1.695
1.77
TBEL (ng/1)
47
WQBEL (ng/1)
45.5
Describe proposed permit actions based on mercury evaluation: Mercury evaluation results used EPA Method
1631E. No annual average mercury concentration exceeded the WQBEL, and no individual mercury sample
exceeded the TBEL. The maximum value reported in this period was 3.37 ng/1. No mercury limit is required.
The mercury minimization plan (MMVIP) will continue to be required under the 3.0 MGD flow tier because
multiple quantifiable levels (> 1 ng/L) of mercury were reported, and this flow tier is > 2 MGD.
6.7 Other TMDL/Nutrient Management Strategy Considerations
If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation within this
permit:
Effluent and instream monitoring for total nitrogen (TN) and total phosphorous (TP) have been included in the
permit per 15A NCAC 02B .0508 for Effluent and recommendation of Basin Planning Section for instream
monitoring. The permit reflects the monthly nutrient (TP and TN; TKN + NO3-N + NO2-N) monitoring for 1.5
MGD and 3.0 MGD flows.
Annual nutrient TN and TP loads: The TN and TP annual loads were calculated with the monthly monitoring
reported during Jan 2017 to Dec 2020. The Facility is currently operating at a flow limit of 1.5 MGD and there
is a proposal to increase it to 3.0 MGD.
Page 10 of 16

Table 8. Nutrients Effluent Data Summary
Parameter
2017
2018
2019
2020
Annual TN load, lb/yr
1,137
1,355
1,219
2,067
Annual TP load, lb/yr
507
603
711
569
6.8 Other WQBEL Considerations
If applicable, describe any other parameters of concern evaluated for WQBELs: NA
If applicable, describe any special actions (HQW or ORW) this receiving stream and classification shall comply
with in order to protect the designated waterbody: NA
If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A
NCAC 2H.0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo:
Based on the RPA predicting a maximum effluent methyl bromide concentration that is greater than the allowable
discharge concentration based on state water quality standards, monthly monitoring for methyl bromide has been
added to the permit [See A. (1) and A. (2)]. To provide an opportunity for the City to develop a plan to assess
sources of methyl bromide in order to come in compliance with the limits in Section A. (1.), a 3-year schedule of
compliance has been added to the permit.
Since the methyl bromide limit is below its current PQL (< 2 µg/L), to show compliance with the limit, the
Division expects non -detects at the PQL (unless the PQL changes before May 25, 2024, and the Permiee can
show compliance with the limit).
If applicable, describe any water quality standards variances proposed in accordance with NCGS 143-215.3(e)
and 15A NCAC 2B. 0226 for this permit renewal: NA
7. Technology -Based Effluent Limitations (TBELs)
Municipals (if not applicable, delete and skip to Industrials)
Are concentration limits in the permit at least as stringent as secondary treatment requirements (30 mg/1
BOD5/TSS for Monthly Average, and 45 mg/1 for BOD5/TSS for Weekly Average). YES
If NO, provide a justification for alternative limitations (e.g., waste stabilization pond). NA
Are 85% removal requirements for BOD5/TSS included in the permit? YES
If NO, provide a justification (e.g., waste stabilization pond). NA
8. Antidegradation Review (New/Expanding Discharge)
The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not
degrade water quality. Permitting actions for new or expanding discharges require an antidegradation review in
accordance with 15A NCAC 2B.0201. Each applicant for a new/expanding NPDES permit must document an
effort to consider non -discharge alternatives per 15A NCAC 2H.0105( c)(2). In all cases, existing instream
water uses and the level of water quality necessary to protect the existing use is maintained and protected.
If applicable, describe the results of the antidegradation review, including the Engineering Alternatives
Analysis (EAA) and any water quality modeling results: NA
Page 11 of 16

9. Antibacksliding Review
Sections 402(o)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit backsliding
of effluent limitations in NPDES permits. These provisions require effluent limitations in a reissued permit to
be as stringent as those in the previous permit, with some exceptions where limitations may be relaxed (e.g.,
based on new information, increases in production may warrant less stringent TBEL limits, or WQBELs may be
less stringent based on updated RPA or dilution).
Are any effluent limitations less stringent than previous permit (YES/NO): NO
If YES, confirm that antibacksliding provisions are not violated: NA
10.Monitoring Frequency Requirements
Monitoring frequencies for NPDES permitting are established in accordance with the following regulations and
guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 2B.0500; 2) NPDES Guidance,
Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance, Reduced Monitoring
Frequencies for Facilities with Superior Compliance (10/22/2012 Memo); 4) Best Professional Judgement
(BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are not considered effluent limitations
under Section 402(o) of the Clean Water Act, and therefore anti -backsliding prohibitions would not be triggered
by reductions in monitoring frequencies.
The facility met the approval criteria for monitoring reduction for BOD, TSS, and Fecal Coliform; therefore, the
monitoring frequency for these parameters was changed from 3/Week to 2/Week for both effluent and influent
where applicable.
As mentioned in Section 6.3 of this fact sheet, with this permit renewal, the City requested monitoring frequency
reduction for ammonia. Upon performing the monitoring reduction frequency evaluation from a period of three
years (12/2017 to 12/2020), this facility has received four non -monthly average limit violations in the past year for
ammonia; therefore, this facility does not meet the approval criteria for monitoring reduction for ammonia
For instream monitoring, refer to Section 4.
11.Electronic Reporting Requirements
The US EPA NPDES Electronic Reporting Rule was finalized on December 21, 2015. Effective December 21,
2016, NPDES regulated facilities are required to submit Discharge Monitoring Reports (DMRs) electronically.
While NPDES regulated facilities would initially be required to submit additional NPDES reports electronically
effective December 21, 2020, EPA extended this deadline from December 21, 2020, to December 21, 2025. The
current compliance date, effective January 4, 2021, was extended as a final regulation change published in the
November 2, 2020 Federal Register This permit contains the requirements for electronic reporting, consistent
with Federal requirements.
12.Summary of Proposed Permitting Actions
Table 9. Current Permit Conditions and Proposed Changes for 1.5 MGD and 3.0 MGD
Parameter
Current Permit Limits
and Monitoring
Frequency
Proposed Change
Basis for Condition/Change
Flow
MA 1.5 MGD
and 3.0 MGD
Continuous monitoring
No changes
15A NCAC 2B .0505
The average flow for the past five years
was less than 1.15 MGD
Page 12 of 16

BOD5
For 1.5 MGD
MA 10.0 mg/I
WA 15.0 mg/I
For 3.0 MGD
Summer:
MA 5.0 mg/1
WA7.5mg/1
Winter:
MA 10.0 mg/I
WA 15.0 mg/I
3/week for 1.5 MGD
Daily for 3.0 MGD
Monitoring frequency
decreased to 2/week
for 1.5 MGD
Waste load allocation for plant
expansion based on WASP Model
Monitoring according to 15A 02B.
0508
2012 DWQ Guidance Regarding
the Reduction of Monitoring
Frequencies in NPDES Permits for
Exceptionally Performing Facilities
TSS
For 1.5 MGD and 3.0
MGD MA 30 mg/1
WA 45 mg/1
3/week for 1.5 MGD
Daily for 3.0 MGD
Monitoring frequency
decreased to 2/week
for 1.5 MGD
TBEL. Secondary treatment
standards/40 CFR 133 / 15A NCAC 2B
.0406.
2012 DWQ Guidance Regarding the
Reduction of Monitoring Frequencies in
NPDES Permits for Exceptionally
Performing Facilities
NH3-N
For 1.5 MGD
MA 2.0 mg/I
WA 6.0 mg/1
For 3.0 MGD
Summer:
MA 1.0 mg/1
WA 3.0 mg/1
Winter:
MA 2.0 mg/1
WA 6.0 mg/I
3/week for 1.5 MGD
Daily for 3.0 MGD
No changes
Waste load allocation for plant
expansion based on WASP Model
Monitoring according to 15A 02B
.0508
DO
For 1.5 MGD and 3.0
MGD DO shall not be
less than 6 mg/1
Monitor and report
effluent
3/week for 1.5 MGD
Daily for 3.0 MGD
Monitor and report
instream for 1.5 MGD
and 3.0 MGD
at a variable** frequency
No changes
Based on a water quality model to
protect DO levels in Lyle Creek
Monitoring according to 15A 02B. 0508
Page 13 of 16

Fecal coliform
(Geometric Mean)
MA 200 /100m1
WA 400 /100m1
for 1.5 MGD and 3.0
MGD
3/week for 1.5 MGD
Daily for 3.0 MGD
Monitoring frequency
decreased to 2/week
for 1.5 MGD
WQBEL. State WQ standard, 15A NCAC
2B .0200.
2012 DWQ Guidance Regarding the
Reduction of Monitoring Frequencies in
NPDES Permits for Exceptionally
Performing Facilities
pH
6 - 9 S.U.
for 1.5 and 3.0 MGD
3/week for 1.5 MGD
Daily for 3.0 MGD
No changes
WQBEL. State W.Q. standard, 15A
NCAC 2B .0200
TRC
DM 28.0 µg/I
for 1.5 MGD and 3.0
MGD
3/week for 1.5 MGD
Daily for 3.0 MGD
No changes
WQBEL. State WQ standard, 15A NCAC
2B .0200. The Division considers all
effluent TRC values reported below 50
ug/1 to be in compliance with the
permit.
Temperature
Monitor and report
effluent daily for
for 1.5 MGD and 3.0
MGD
Monitor and report
instream for 1.5 MGD
and 3.0 MGD
at a variable** frequency
No changes
15A NCAC 2B.0200 and 15A NCAC
2B.0500
Total Copper
Quarterly monitoring
for 3.0 MGD
Added quarterly
monitoring for 1.5
MGD and keeping
quarterly monitoring
for 3.0 MGD
Based on RPA. Predicted Max >_ 50% of
Allowable Cw
Total Zinc
Quarterly monitoring
for 1.5 MGD and 3.0
MGD
No changes
Based on RPA. Predicted Max > 50% of
Allowable Cw
Total Lead
Quarterly monitoring
for 3.0 MGD
Removed quarterly
monitoring for 3.0
MGD
Based on RPA. Predicted Max < 50% of
Allowable Cw
Bis(2-ethylhexyl)
Phthalate
Quarterly monitoring
for 1.5 MGD
Monthly monitoring for
3.0 MGD
MA: 6.1 µg/I
Updated MA limit for
3.0 MGD as 5.8 µg/I
Based on RPA. Predicted Max > 50% of
Allowable Cw
EPA National Recommended Water
Quality Criteria for Human Health
Page 14 of 16

Methyl Bromide
None
Added monthly
monitoring for 1.5
MGD and MA limit:
0.26 µg/I
Added monthly
monitoring for 3.0
MGD and MA limit:
0.15 µg/I
3-year schedule of
compliance has been
added to the permit for
1.5 MGD
Based on RPA. RP exists. Predicted Max
> Allowable Cw. 5 values > Allowable
Cw
North Carolina In -Stream Target Values
for Surface Waters
Dichlorobromomethane
None
Added quarterly
monitoring for 1.5
MGD
Added monthly
monitoring for 3.0
MGD and MA limit:
17.3 µg/I
Based on RPA. RP exists. Predicted Max
> Allowable Cw
North Carolina In -Stream Target Values
for Surface Waters
Total Hardness
Quarterly monitoring
upstream and in
effluent
for 1.5 MGD and 3.0
MGD
No changes
Hardness -dependent dissolved metals
water quality standards approved in
2016
Total Nitrogen (TN)
Monitor and report
effluent monthly for
for 1.5 MGD and 3.0
MGD
Monitor and report
instream for 1.5 MGD
and 3.0 MGD
at a variable**
frequency
No changes
15A NCAC 02B .0508 for Effluent
and recommendation of Basin
Planning Section for instream
monitoring
Total Phosphorus (TP)
Monitor and report
effluent monthly for
for 1.5 MGD and 3.0
MGD
Monitor and report
instream for 1.5 MGD
and 3.0 MGD
at a variable**
frequency
No changes
15A NCAC 02B .0508 for Effluent and
recommendation of Basin Planning
Section for instream monitoring
Page 15 of 16

Chlorophyll A
For 1.5 MGD and 3.0
MGD
monitor and report
instream at a variable**
frequency
No changes
Per recommendation of Basin Planning
Section for instream monitoring
Chronic Toxicity Test
Chronic limit, 15% at 1.5
MGD or 26% at 3.0 MGD
No changes
WQBEL. No toxics in toxic amounts.
15A NCAC 2B.0200 and 15A NCAC
2B.0500
Effluent Pollutant Scan
Three times per permit
cycle for 1.5 MGD and
3.0 MGD
Next scans must be
performed in each of
the following years:
2023, 2024, and 2025.
40 CFR parts 423 and 122
Mercury Minimization
Plan (MMP)
MMP required
for 3.0 MGD
No changes
Consistent with EPA approved 2012
Statewide Mercury TMDL
Electronic Reporting
Electronic reporting
special condition
for 1.5 MGD and 3.0
MGD
Added language for
new electronic
reporting deadline
December 21, 2025
In accordance with EPA Electronic
Reporting Rule 2015 and Rule -Phase 2
Extension
*MA - Monthly Average, WA - Weekly Average, DM - Daily Max.
* * Variable monitoring frequency for total nitrogen, total phosphorous, and chlorophyll a is defined as follows: twice per month during
June 1 through September 30 and monthly from October 1 through May 31.
Variable monitoring frequency for dissolved oxygen and temperature is defined as follows: Samples collected three times per week
during June 1 through September 30 and once per week October 1 through May 31.
13.Public Notice Schedule
Permit to Public Notice: April 7, 2021
Per 15A NCAC 2H .0109 & .0111, The Division will receive comments for a period of 30 days following the
publication date of the public notice. Any request for a public hearing shall be submitted to the Director within
the 30 days comment period indicating the interest of the party filing such request and the reasons why a hearing
is warranted.
14.Fact Sheet Addendum (if applicable)
Were there any changes made since the Draft Permit was public noticed (Yes/No): No
If Yes, list changes and their basis below: NA
15.Fact Sheet Attachments (upon request)
1. RPA Sheets Summary for 1.5 and 3.0 MGD. Each sheet contains: input information tab, data analyzed
tab, and results summary tab.
2. BOD and TSS Removal Rate calculations
3. Data Summary for Reduced NPDES Permit Monitoring Reduction Frequency Assessment
4. NH3/TRC/Fecal Waste Load Allocation (WLA) Spreadsheet for 1.5 and 3.0 MGD
5. Mercury TMDL Calculations for 1.5 and 3.0 MGD
6. Toxicity Summary/WET testing
7. Instream data summary and ttest
8. Monitoring Report Violations summary
9. Compliance Evaluation Inspection
10. Renewal Application Addendums - Addendum Form 2A
11. Correspondence
12. NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
13. Signed effluent pollutant scans
14. Public Water Supply memo
15. Affidavit
Page 16 of 16

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Limited dataset. No RP, Predicted Max < 50 % of
Allowable Cw - No Monitoring required, other than
pollutant scan (PS)
A- ll values in limited dataset reported non -detect < 1
ug/L - No Monitoring required, other than PS.
No - RP, Predicted Max < 50 % of Allowable Cw - No
Monitoring required, other than PS.
N- o RP, Predicted Max < 50 % of Allowable Cw - No
Monitoring required, other than PS.
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a: No monitoring required other than PS if all Total
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Total Cr is < allowable Cw for Cr VI.
Pr- edicted Max > 50% Allowable Cw. No value >
Allowable Cw. Apply Quarterly Monitoring
REASONABLE POTENTIAL RESULTS
ri # Det. Max Pred Cw Allowable Cw
Acute (FW): 1,913.5
Chronic (FW) 988.7
Max MDL = 10 Ch_ _
ronic (HH) 354.1
Max MDL = 10
Acute: 365.82
Chronic: 42.84
Max MDL = 1
Acute: 23.640
Chronic: 4.821
Max MDL = 1
Acute: NO WQS
Chronic: 12.9
Max MDL = 0.1
Acute: 6,499.2
Chronic: 979.6
Acute: 90.0
Chronic: 72.5
knowable Cw
Max reported value = 2.5
Max MDL = 5
Acute: 78.00
Chronic: 66 24
No value > Allowable Cw
Acute:—_—_—_123.8
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Note: n < 9
Limited data set
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Note: n < 9
Limited data set
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Note: n < 9
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dataset. No value > Allowable concentration.
Pr- edicted Max > 50% of Allowable Cw. No value >
Allowable concentration. Continue Quarterly
Monitoring
R- P exists. Predicted Max > Allowable Cw , 5
value(s) > Allowable Cw. Monitor monthly and add
permit limit
Acute: NO WQS
0.55 WS(Qavg) µg/L 5 3 41.29600 _____ _______________________
Note: n <9 C.V. (default) Chronic: 19.47473 RP exists. Predicted Max > Allowable Cw, no value >
Limited data set No value> Allowable Cw Allowable Cw, limited data set. Apply Quarterly
Monitoring
Chronic: 33.0
Max MDL = 10
Acute: 593.364
Chronic: 26.688
No value > Allowable Cw
Acute (FW): 2,426.5
Chronic (FW): 312.2
Max MDL =5
Chronic (WS): 164.8
Max MDL = 5
Acute: 315.2
Chronic: 33.0
Max MDL = 10
Acute: 2.783
Chronic: 0.395
Max MDL = 5
Acute: 910.3
Chronic: 1,063.0
No value > Allowable Cw
Acute: NO WQS
Chronic: 395 484
No value > Allowable Cw
Acute: NO WQS
Chronic: 11.33075
No value > Allowable Cw
Acute: NO WQS
Chronic: 0.26366
5 value(s)> Allowable Cw
C.V. (default)
NO DETECTS
5.800
C.V. (default)
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-
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Note: n < 9
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4.0489 FW(7Q10s) 105.4315
47.3612 FW(7Q10s) 431.1483
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Table 2. Parameters of Concern
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O)
1
J
O)
1
J_
O)
1
0
N-
LO
0
p
V
CO
N/A
Ln
4.4269
M
O0
(M
N
CO
Q
Z
14.6681
N
N
112.7685
453.6479
Q
Z
CO
in
0.5483
0)
0)
O
u_2
i
2
LL
LL
>
Q
Q
LL
LL
LL
LL
LL
LL
LL
LL
>
L�L
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5j
1
1
L_
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0.7625
O
300
155.4680
z
10.5327
U)
1,800
4.3060
(N
8
49.6174
25.0000
1C)
00
0
168.9694
co
o
0.04
0
0
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
0
Z
O
Z
0
Z
0
Z
0
Z
O
Z
0
Z
0
Z
0
Z
O
Z
0
O
Z
Aquactic Life
Human Health
Water Supply
Aquatic Life
Aquatic Life
Water Supply
Water Supply
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Aquatic Life
Water Supply
Aquatic Life
Water Supply
Aquatic Life
Aquatic Life
Aquatic Life
Water Supply
Human Health
Aquatic Life
Arsenic
Arsenic
Beryllium
Cadmium
Chlorides
Chlorinated Phenolic Compounds
Total Phenolic Compounds
Chromium III
Chromium VI
Chromium, Total
Copper
Cyanide
Fluoride
Lead
Mercury
Molybdenum
Nickel
Nickel
E
3
.c
T.)
0)
N,
>
U
c
Chloroform
Bis(2--ethylhexyl) phthalate
Methyl Bromide
T
N M W O N- CO M 0 N M V W O N OO 07 O • N M
O O O 0 0 0 0 0 NNNNN
a • a • a • a • a • a • a • a • a a a a a a a • a • a • a • a • a • a • a • a • a
WWI
Hickory -Catawba VWVTP
>
NC0025542
0
O
0
O
4)
2
0
J
O
O
co
O
0
ch
Facility Name
WWTPIWTP Class
NPDES Permit
0
Flow, Qw (MGD)
Receiving Stream
HUC Number
Stream Class
❑✓ Apply WS Hardness WQC
O
0
0
CO
N
0
0
co
0
V) w N
(.) u w (i
u w
O • O N V� O
55005
47.49 mg/L (Avg)
30.68 mg/L (Avg)
J
0)
E
1
()
J
0)
E
L()
co
Effluent Hardness
Upstream Hardness
Combined Hardness Chronic
Combined Hardness Acute
w
0
0
a
0
0
w
0

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
COMBINED HARDNESS
WWTP/WTP Class: IV
30.1762109
z
W
U
K
(0
1- a
o.
w
a60
zw
0
vj
0 vj
W Q
a4
= W
7 d'
0 N
14.40966842
Effluent Hard: 0 value > 100 mg/L
Effluent Hard Avg = 47.49 mg/L
O
O
(O
O
CO
O
0
2
N
O
O co O O N O 0
O 1- O O co O U1
cri
M N ▪ co J
E
w w W W W y
0 0 N Q� bA
0 0 o a
a adCY 3 '5'
N o
w �
a
.
RECOMMENDED ACTION
Limited dataset. No RP, Predicted Max < 50 % of
Allowable Cw - No Monitoring required, other than
pollutant scan (PS)
A- ll values in limited dataset reported non -detect < 1
ug/L - No Monitoring required, other than PS.
No - RP, Predicted Max < 50 % of Allowable Cw - No
Monitoring required, other than PS.
N- o RP, Predicted Max < 50 % of Allowable Cw - No
Monitoring required, other than PS.
See Chromium, Total
See Chromium, Total
a: No monitoring required other than PS if all Total
Chromium samples are < 5 pg/L or Pred. max for
Total Cr is < allowable Cw for Cr VI.
Pr- edicted Max > 50% Allowable Cw. No value >
Allowable Cw. Apply Quarterly Monitoring
REASONABLE POTENTIAL RESULTS
ri # Det. Max Pred Cw Allowable Cw
Acute (FW): 1,126.8
Chronic (FW) 569.4
Max MDL = 10 _ _
Chronic (HH) 182.0
Max MDL = 10
Acute: 215.41
Chronic: 24.67
Max MDL = 1
Acute: 14.670
Chronic: 2.894
Max MDL = 1
Acute: NO WQS
Chronic: 6 9
Max MDL = 0.1
Acute: 4,020.2
Chronic: 590.1
Acute: 53.0
Chronic: 41.8
knowable Cw
Max reported value = 2.5
Max MDL = 5
Acute: 48.61
Chronic: 39 98
No value > Allowable Cw
Acute: 72.9 --_
0 h
U 2
1.16
C.V. (default)
NO DETECTS
1.160
C.V. (default)
NO DETECTS
0.1
C.V. (default)
NO DETECTS
<
a
< u h
Al L
r
5 0
Note: n < 9
Limited data set
5 0
Note: n < 9
Limited data set
5 0
Note: n < 9
Limited data set
5 0
Note: n < 9
Limited data set
O
0
O
0
Tot Cr value
5 0
Note: n < 9
Limited data set
7
N
O
sewn
t,,
t.
t.
t.
t.
t.
t.
t.
t.
t.
lbd
o
NC STANDARDS OR EPA CRITERIA
Chronic Applied Acute
Standard
150 FW(7Q10s) 340
10 HH/WS(Qavg)
v,
o
a
w
0.7625 FW(7Q10s) 4.4269
1 A(30Q2)
155.4680 FW(7Q10s) 1213.1031
11 FW(7Q10s) 16
10.5327 FW(7Q10s) 14.6681
N
N
o_
a
w
v,
111
U
U
Z
Z
Z
Z
Z
Z
Z
z
PARAMETER
Arsenic
Arsenic
E
0
m
Cadmium
Chlorinated Phenolic Compounds
Chromium III
Chromium VI
Chromium, Total
Copper
a
72

L
0
4-
C
r
4-
C0
C
y
0
0
C
0
U
0)
O
L
a
0)
a
L
0
4-
N
L
u_
mited dataset. Predicted Max < 50% of Allowable
Cw. No Monitoring required, other than pollutant scan
S)
Li- mited dataset. No RP, Predicted Max < 50% of
Allowable Cw - No Monitoring required, other than
pollutant scan (PS)
No - RP. All values reported non -detect < 5 ug/L
Predicted Max < 50% of Allowable Cw - No
Monitoring required other than PS
Predicted Max > 50% of Allowable Cw. Limited
dataset. No detects. Method with the lowest PQL
must be used
R- P exists. Predicted Max > Allowable Cw. Limited
dataset. Apply Quarterly Monitoring. Method with the
lowest PQL must be used
Predicted Max > 50% of Allowable Cw. No value >
Allowable Cw. Continue Quarterly Monitoring
- ----------------------------
Predicted Max > 50% of Allowable Cw. Limited
dataset. No value > Allowable concentration.
R- P exists. Predicted Max > Allowable Cw. 1 value >
Allowable concentration. Continue Quarterly
Monitoring and update MA limit to 5.8 ug/I
R- P exists. Predicted Max > Allowable Cw , 5
value(s) > Allowable Cw. Monitor monthly and add
permit limit
Acute: NO WQS
0.95 WS(Qavg) µg/L 5 3 41.29600 _____ _______________________
Note: n <9 C.V. (default) Chronic: 17.29409 RP exists. Predicted Max > Allowable Cw, 1 value >
Allowable Cw, limited data set. Apply Quarterly
Limited data set 1 value(s)> Allowable Cw Monitoring and add permit limit
Chronic: 19.0
Max MDL = 10
Acute: 373.712
Chronic: 16.344
No value > Allowable Cw
Acute (FW): 1,503.4
Chronic (FW): 188.3
Max MDL =5
Chronic (WS): 94.9
Max MDL = 5
Acute: 185.6
Chronic: 19.0
Max MDL = 10
Acute: 1.817
Chronic: 0.228
Max MDL = 5
Acute: 564.0
Chronic: 641.4
No value > Allowable Cw
Acute: NO WQS
Chronic: 227 742
No value > Allowable Cw
Acute: NO WQS
Chronic: 5.82538
1 value(s)> Allowable Cw
Acute: NO WQS
Chronic: 0.15183
5 value(s)> Allowable Cw
C.V. (default)
NO DETECTS
5.800
C.V. (default)
U
`+N . w
0.'O Q
v
11.6
C.V. (default)
NO DETECTS
5.800
C.V. (default)
NO DETECTS
7
O
182.12000
C.V. (default)
12.97200
27.14400
C.V. (default)
Note: n < 9
Limited data set
5 1
Note: n < 9
Limited data set
t
T cl
VI'a
C v
V
z I-
5 0
Note: n < 9
Limited data set
5 0
Note: n < 9
Limited data set
M
M
5 4
Note: n < 9
Limited data set
-
5 2
Note: n < 9
Limited data set
4.3060 FW(7Q10s) 112.7685
49.6174 FW(7Q10s) 453.6479
25.0000 WS(7Q10s)
0
a
w
0.06 FW(7Q10s) 0.5483
168.9694 FW(7Q10s) 170.1997
0
a
o
0.32 HH(Qavg)
0.04 FW(7Q10s)
Z
Z Z
Z
Z
Z
Z
U
Z
U '
'p
W
J
W W
Y Y
U U
Selenium
W
jq
U
C
N
Chloroform
Bis(2--ethylhexyl) phthalate
Methyl Bromide
Dichlorobromomethane
co
O
a

REASONABLE POTENTIAL ANALYSIS
H1
Effluent Hardness
Date Data BDL=1/2DL Results
1 10/5/2016 47.5 47.5 Std Dev.
2 11/1/2016 66.3 66.3 Mean
3 2/7/2017 56.6 56.6 C.V.
4 3/21/2017 51.5 51.5 n
5 4/11/2017 47.3 47.3 10th Per value
6 5/2/2017 46.4 46.4 Average Value
7 8/8/2017 51.6 51.6 Max. Value
8 11/6/2017 51.2 51.2
9 2/6/2018 49 49
10 5/8/2018 46.1 46.1
11 8/7/2018 45.5 45.5
12 11/6/2018 42.9 42.9
13 2/5/2019 46 46
14 5/7/2019 41 41
15 8/6/2019 52.7 52.7
16 11/5/2019 45.2 45.2
17 2/4/2020 37.8 37.8
18 5/5/2020 37.2 37.2
19 8/4/2020 45.6 45.6
20 11/10/2020 42.4 42.4
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
H2
Upstream Hardness
6.5695
47.4900
0.1383
20
40.68 mg/L
47.49 mg/L
66.30 mg/L
Date Data BDL=1/2DL Results
1 10/5/2016 34.7 34.7 Std Dev.
2 11/1/2016 35.8 35.8 Mean
3 2/7/2017 33.9 33.9 C.V.
4 3/21/2017 33 33 n
5 4/11/2017 35.4 35.4 10th Per value
6 5/2/2017 29.3 29.3 Average Value
7 8/2/2017 21.5 21.5 Max. Value
8 11/6/2017 31.3 31.3
9 2/6/2018 27.3 27.3
10 5/8/2018 25.7 25.7
11 8/15/2018 33 33
12 11/6/2018 33.7 33.7
13 2/5/2019 30.4 30.4
14 5/7/2019 25.6 25.6
15 8/6/2019 30.2 30.2
16 11/5/2019 32.1 32.1
17 2/4/2020 30.2 30.2
18 5/5/2020 29.7 29.7
19 8/4/2020 27.8 27.8
20 11/10/2020 32.9 32.9
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
3.7009
30.6750
0.1206
20
25.69 mg/L
30.68 mg/L
35.80 mg/L
25542 RPA 3.0.xlsm, data
- 1 3/10/2021

REASONABLE POTENTIAL ANALYSIS
Par01 & Par02
Arsenic
Date Data BDL=1/2DL Results
1 2/2/2016 < 10 5 Std Dev.
2 8/8/2017 < 10 5 Mean
3 11/6/2018 < 10 5 C.V. (default)
4 5/9/2019 < 10 5 n
5 2/4/2020 < 10 5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
0.0000
5.0000
0.6000
5
2.32
5.0 ug/L
11.6 ug/L
25542 RPA 3.0.xlsm, data
- 2 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
Par03
Beryllium
Date Data BDL=1/2DL Results
1 2/2/2016 < 1 0.5 Std Dev.
2 8/8/2017 < 1 0.5 Mean
3 11/6/2018 < 1 0.5 C.V. (default)
4 5/9/2019 < 1 0.5 n
5 2/4/2020 < 1 0.5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par04
Cadmium
0.0000
0.5000
0.6000
5
2.32
0.50 ug/L
1.16 ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 < 1.0 0.5 Std Dev.
2 8/8/2017 < 1.0 0.5 Mean
3 11/6/2018 < 1.0 0.5 C.V. (default)
4 5/9/2019 < 1.0 0.5 n
5 2/4/2020 < 1.0 0.5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
0.0000
0.5000
0.6000
5
2.32
0.500 ug/L
1.160 ug/L
25542 RPA 3.0.xlsm, data
- 3 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
Par05
Chlorides
Date Data
BDL=1/2DL Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
Use "PASTE SPECIAL -
Values.' then "COPY" .
Maximum data points =
58
Par06
Chlorinated Phenolic Compounds
NO DATA 1
NO DATA 2
NO DATA 3
0 4
5
N/A 6
N/A mg/L 7
N/A mg/L 8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Date Data
2/2/2016 <
8/8/2017 <
11/6/2018 <
5/9/2019 <
2/4/2020 <
BDL=1/2DL Results
0.1 0.05 Std Dev.
0.1 0.05 Mean
0.1 0.05 C.V. (default)
0.1 0.05 n
0.1 0.05
Mult Factor =
Max. Value
Max. Pred Cw
Use "PASTE SF
Values" then "I
. Maximum c
points = 5
0.0000
0.0500
0.6000
5
2.32
0.1
0.1
25542 RPA 3.0.xlsm, data
- 4 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
'ECIAL
COPY"
iota
i8
Par07
Total Phenolic Compounds
ug/L
ug/L
Date Data BDL=1/2DL Results
1 Std Dev.
2 Mean
3 C.V.
4 n
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
NO DATA
NO DATA
NO DATA
0
Mult Factor = N/A
Max. Value N/A ug/L
Max. Pred Cw N/A ug/L
Par08
Use "PASTE SF
Values" then "I
. Maximum c
points = 5
Date Data BDL=1/2DL Results
1 Std Dev. NO DATA
2 Mean NO DATA
3 C.V. NO DATA
4 n 0
5
6 Mult Factor = N/A
7 Max. Value N/A
8 Max. Pred Cw N/A
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Chromium III
25542 RPA 3.0.xlsm, data
- 5 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
'ECIAL
COPY"
iota
i8
Par09
Chromium VI
pg/L
pg/L
Date Data BDL=1/2DL Results
1 Std Dev.
2 Mean
3 C.V.
4 n
5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par10
Chromium, Total
NO DATA
NO DATA
NO DATA
0
N/A
N/A pg/L
N/A pg/L
Date Data BDL=1/2DL Results
1 2/2/2016 < 5.0 2.5 Std Dev.
2 8/8/2017 < 5.0 2.5 Mean
3 11/6/2018 < 5.0 2.5 C.V. (default)
4 5/9/2019 < 5.0 2.5 n
5 2/4/2020 < 5.0 2.5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SF
Values" then "I
. Maximum c
points = 5
0.0000
2.5000
0.6000
5
2.32
2.5
5.8
25542 RPA 3.0.xlsm, data
- 6 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
'ECIAL
COPY"
iota
i8
Pall
Copper
pg/L
pg/L
Date Data BDL=1/2DL Results
1 2/2/2016 5.2 5.2 Std Dev.
2 5/4/2016 < 38 19 Mean
3 5/18/2016 < 38 19 C.V.
4 6/1/2016 < 38 19 n
5 6/15/2016 < 38 19
6 7/6/2016 < 38 19 Mult Factor =
7 7/20/2016 < 38 19 Max. Value
8 8/3/2016 < 38 19 Max. Pred Cw
9 8/17/2016 < 38 19
10 9/8/2016 < 38 19
11 9/23/2016 < 38 19
12 10/5/2016 < 50 25
13 10/19/2016 < 50 25
14 8/8/2017 < 5 2.5
15 11/6/2018 3.9 3.9
16 5/9/2019 1.2 1.2
17 2/4/2020 4.8 4.8
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par12
Cyanide
8.0218
15.1529
0.5294
17
1.39
25.00 ug/L
34.75 ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 < 0.1 5 Std Dev.
2 8/8/2017 < 0.1 5 Mean
3 11/6/2018 < 0.1 5 C.V. (default)
4 5/9/2019 < 0.1 5 n
5 2/4/2020 < 0.1 5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SF
Values" then "I
. Maximum c
points = 5
0.0000
5.00
0.6000
5
2.32
5.0
11.6
25542 RPA 3.0.xlsm, data
- 7 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
'ECIAL
COPY"
iota
i8
Par14
Lead
ug/L
ug/L
Date BDL=1/2DL Results
1 2/2/2016 < 0.10 0.05 Std Dev.
2 8/8/2017 0.15 0.15 Mean
3 11/6/2018 < 5.00 2.5 C.V. (default)
4 5/9/2019 < 5.00 2.5 n
5 2/4/2020 < 5.00 2.5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par15
Mercury
1.3150
1.5400
0.6000
5
2.32
2.500 ug/L
5.800 ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 2.29 2.29 Std Dev.
2 8/8/2017 3.37 3.37 Mean
3 10/22/2018 < 5.54 3.18 C.V. (default)
4 11/6/2018 3.18 0.883 n
5 1/9/2019 < 3.39 1.695
6 5/9/2019 0.883 2.77 Mult Factor =
7 2/4/2020 1.77 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SF
Values" then "I
. Maximum c
points = 5
0.9475
2.3647
0.6000
6
2.01
3.4
6.8
25542 RPA 3.0.xlsm, data
- 8 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
'ECIAL
COPY"
iota
i8
Par16
Molybdenum
ng/L
ng/L
Date Data BDL=1/2DL Results
1 Std Dev.
2 Mean
3 C.V.
4 n
5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par17 & Par18
Nickel
NO DATA
NO DATA
NO DATA
0
N/A
N/A ug/L
N/A ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 < 5.00 2.5 Std Dev.
2 8/8/2017 < 5.00 2.5 Mean
3 11/6/2018 < 5.00 2.5 C.V. (default)
4 5/9/2019 < 5.00 2.5 n
5 2/4/2020 < 5.00 2.5
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PAS
SPECIAL-Va
then "COP
Maximum
points =
0.0000
2.5000
0.6000
5
2.32
2.5
5.8
25542 RPA 3.0.xlsm, data
- 9 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
TE
dues
data
58
pg/L
pg/L
Par19
Selenium
Date Data BDL=1/2DL Results
1 2/2/2016 < 10.00 5 Std Dev.
2 8/8/2017 < 10.00 5 Mean
3 11/6/2018 < 0.50 0.25 C.V. (default)
4 5/9/2019 < 0.50 0.25 n
5 2/4/2020 < 0.50 0.25
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE
SPECIAL -Values
then "COPY" .
Maximum data
points = 58
Par20
Silver
2.6017
2.1500
0.6000
5
2.32
5.0 ug/L
11.6 ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 < 5.00 2.5 Std Dev.
2 8/8/2017 < 5.00 2.5 Mean
3 11/6/2018 < 0.50 0.25 C.V. (default)
4 5/9/2019 < 0.50 0.25 n
5 2/4/2020 < 0.50 0.25
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE f.
Values" then
Maxim um dat:
58
1.2324
1.1500
0.6000
5
2.32
2.500
5.800
25542 RPA 3.0.xlsm, data
- 10 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
SPECIAL -
"COPY".
points =
Par21
Zinc
ug/L
ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 55.8 55.8 Std Dev.
2 5/4/2016 38 38 Mean
3 5/18/2016 64 64 C.V.
4 6/1/2016 65 65 n
5 6/15/2016 61 61
6 7/6/2016 73 73 Mult Factor =
7 7/20/2016 147 147 Max. Value
8 8/3/2016 52 52 Max. Pred Cw
9 8/17/2016 62 62
10 9/8/2016 38 38
11 9/23/2016 42 42
12 10/5/2016 < 50 25
13 10/19/2016 < 50 25
14 11 /1 /2016 138 138
15 2/7/2017 94.7 94.7
16 3/21/2017 83.8 83.8
17 4/11/2017 65.9 65.9
18 5/2/2017 39.8 39.8
19 8/8/2017 33.5 33.5
20 11/6/2017 49.1 49.1
21 2/6/2018 121 121
22 5/8/2018 39.9 39.9
23 8/7/2018 39.9 39.9
24 11/6/2018 49.1 49.1
25 2/5/2019 43.2 43.2
26 5/7/2019 35.2 35.2
27 5/9/2019 37.4 37.4
28 8/6/2019 44.6 44.6
29 11/5/2019 27.8 27.8
30 2/4/2020 430 430
31 5/5/2020 57.9 57.9
32 8/4/2020 36 36
33 11/10/2020 51.7 51.7
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Par22
Chloroform
71.3971
68.6758
1.0396
33
1.28
430.0 ug/L
550.4 ug/L
Date Data BDL=1/2DL Results
1 2/2/2016 28.6 28.6 Std Dev.
2 8/8/2017 78.5 78.5 Mean
3 11/6/2018 < 2 1 C.V. (default)
4 5/9/2019 73 73 n
5 2/4/2020 7.70 7.7
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
25542 RPA 3.0.xlsm, data
- 11 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
Use "PASTE SPECIAL -
Values" then "COPY" .
Maxim um data points - 58
Par23
Bis(2--ethylhexyl) phthalate
36.1953
37.7600
0.6000
5
2.32
78.500000 pg/L
182.120000 pg/L
Date Data BDL=1/2DL Results
1 11/1/2016 < 5 2.5 Std Dev.
2 1/3/2017 < 5 2.5 Mean
3 4/5/2017 < 5 2.5 C.V.
4 7/5/2017 < 5 2.5 n
5 10/2/2017 9.2 9.2
6 1/2/2018 < 5 2.5 Mult Factor =
7 4/2/2018 < 5.1 2.55 Max. Value
8 7/18/2018 < 4.9 2.45 Max. Pred Cw
9 10/2/2018 < 5 2.5
10 1/9/2019 < 5 2.5
11 4/1/2019 < 5 2.5
12 7/9/2019 < 5 2.5
13 10/1/2019 < 5 2.5
14 1/6/2020 < 5 2.5
15 4/6/2020 < 5 2.5
16 7/6/2020 < 5 2.5
17 10/5/2020 < 5 2.5
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL -Values" then
"COPY" . Maxim um data points = 58
Par24
Methyl Bromi
1.6251
2.8941
0.5615
17
1.41
9.200000 pg/L
12.972000 pg/L
Date Data BDL=1/2DL
1 2/2/2016 4.4 4.4
2 8/8/2017 < 2 1
3 11/6/2018 11.7 11.7
4 5/9/2019 < 2 1
5 2/4/2020 < 2 1
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
25542 RPA 3.0.xlsm, data
- 12 - 3/10/2021

REASONABLE POTENTIAL ANALYSIS
ide
Results
Std Dev.
Mean
C.V. (default)
n
Mult Factor =
Max. Value
Max. Pred Cw
Use "PASTE SPECIAL -
Values" then "COPY" .
Maxim um data points - 58
Par25
Dichlorobromomethane
4.6446
3.8200
0.6000
5
2.32
11.700000 pg/L
27.144000 pg/L
Date Data BDL=1/2DL Results
1 2/2/2016 4.1 4.1 Std Dev.
2 8/8/2017 11.7 11.7 Mean
3 11/6/2018 < 2 1 C.V. (default)
4 5/9/2019 17.8 17.8 n
5 2/4/2020 < 2 1
6 Mult Factor =
7 Max. Value
8 Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
7.4005
7.1200
0.6000
5
2.32
17.800000 pg/L
41.296000 pg/L
25542 RPA 3.0.xlsm, data
- 13 - 3/10/2021

-1
CV
0
CV
00
m
Hickory - Catawba WWTP
NCOO25542
@
2 £
To §
> 2
0
@
s
4-,
c_
0
�
v
1-
k
k
m e o m»» e#_#»#»# e m t m e t e t m e#_
m o 0 o e o m e t o= o m o e m m e== o# o o e e
« 4 a a a a a a a a CO a a a a& a a a a a CO a a«
e e e e e e e e e e e e e e e e e e e e e e e e e e
November-18
December-18
61
I . % % % %
a a
G 2 y •'_ / § E
� / 2 ® /
m
October-19
November-19
December-19
January-20
February-20
0
0 0 0 0 \ 0
/ / § m E
/ ®2 -, \ k
e
m
October-20
November-20
December-20
January-21
February-21
CO e e e m m# t» o=» e e o o e# e m e t m »oee # o#
m o t e#» e t 0 e t t e m# e e t m e# t m m e CC) e=_
a a a a a a a a a a a a a a« a a a a a a& 3 a a a a 3«
e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e
October-16
November-16
December-16
January-17
February-17
N
\ \ \ f
/ • / § k
/ ® 2 < k
e
m
October-17
November-17
December-17
January-18
February-18
00
% _ _ _ _ 00
% e e e %
/ » - § m E /
/ < > 2 Q \ o
® e \
m
Overall TSS removal rate
CC
CC
k
k
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» = e » _ = e = _ » » _ _ _ _ » » _ _ _ _ _ = e = »
e e e e e e e e e e e e e e e e e e e e e e e e e
November-18
December-18
% % C % ,_
\ 2 / / § \ E
§ ƒ / > Q 2 \ 3
October-19
November-19
December-19
January-20
February-20
0r \ \\\ N// \ E §
/ ®2 -, k
e
m
October-20
November-20
December-20
January-21
February-21
/
\
>
q
0_
» 0 0# e t t e m# e t m» 0# e e e m e e e m e# e# e
e@@@@ w w 0 g g w@ 0 e 0 g g 0 w m w m@ 0 w w f D f
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e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e
\
/ \
October-16
November-16
December-16
January-17
February-17
\ N N f qj
a a
S• E / § \ E
/ ® 2 < IDA k
e
m
October-17
November-17
December-17
January-18
February-18
% _ _ _ _ % 00
2 / ® � %
y '_ / § \ E a
/ ® � < m cc
e /
m
Overall CBOD removal rate

Reduction in Frequency Evaluation
Hickory - Catawba WWTP
Class III /1.5 MGD
NC0025542
12/29/2017 - 12/29/2020
T
u
ra
Facility Class/Flow:
Permit No.
Review period (use
3 yrs)
LL
Z
>-
Approval Criteria:
z
z
z
z
I1. Currently under Special Orders by
Consent (SOC) (3)
2. On EPA Quarterly noncompliance
report
3. Facility or employees convicted of
CWA violations within the last five
years (2)
4. More than one civil penalty
assessment for permit limit
violations for each target parameter
during previous three years (1)
}
}
Z
}
M1•
r-I
A
asessment
M1•
N
A
Z Z r Z
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0
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w
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}
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}
2.091666667
2.845824411
0.528381295
0.753938088
2
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0
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0
0
J J J 0
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Data Review
0
0
00
rn
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ra
c
O
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E
Fecal Coliform

z
J
z
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\ / / z ) OD \ {
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document li
Conclusion: The facility meets the approval criteria for monitoring reduction for BOD, TSS, and Fecal Coliform

NH3/TRC WLA Calculations
Facility: City of Hickory/ Hickory - Catawba Wastewater Treatment Plant (WWTP)
PermitNo. NC0025542
Prepared By: Diana Yitbarek
Enter Design Flow (MGD):
Enter s7Q10 (cfs):
Enter w7Q10 (cfs):
1.5
13
19
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
Upstream Bkgd (ug/I)
IWC (%)
Allowable Conc. (ug/I)
Maintain limit at 28 ug/I
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
Maintain 200/100 ml MA limit
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/I)
13 s7Q10 (CFS)
1.5 DESIGN FLOW (MGD)
2.325 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 Upstream Bkgd (mg/I)
15.17 IWC (%)
112 Allowable Conc. (mg/I)
Current MA limit: 2.0 mg/I
There were no MA ammonia exceedances in summer
Daily Max (summer): 5.8 mg/I
Maintain limit
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/I)
w7Q10 (CFS)
200/100mI DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
6.59 Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Current MA limit: 2.0 mg/I
Maximum MA ammonia (winter): 5.2 mg/I
Daily Max (winter): 10.3 mg/I
Maintain limit
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
13
1.5
2.325
1.0
0.22
15.17
5.4
19
1.5
2.325
1.8
0.22
10.90
14.7
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
Summer: April 1 - Oct 30
Winter: Nov. 1 - March 31

NH3/TRC WLA Calculations
Facility: City of Hickory/ Hickory - Catawba Wastewater Treatment Plant (WWTP)
PermitNo. NC0025542
Prepared By: Diana Yitbarek
Enter Design Flow (MGD):
Enter s7Q10 (cfs):
Enter w7Q10 (cfs):
3
13
19
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
Upstream Bkgd (ug/I)
IWC (%)
Allowable Conc. (ug/I)
Maintain limit at 28 ug/I
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
Maintain 200/100 ml MA limit
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/I)
13 s7Q10 (CFS)
3 DESIGN FLOW (MGD)
4.65 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 Upstream Bkgd (mg/I)
26.35 IWC (%)
65 Allowable Conc. (mg/I)
Current MA limit: 1.0 mg/I
There were no MA ammonia exceedances in summer
Daily Max (summer): 5.8 mg/I
Maintain limit
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/I)
w7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
3.80 Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Current MA limit: 3.0 mg/I
Maximum MA ammonia (winter): 5.2 mg/I
Daily Max (winter): 10.3 mg/I
Maintain limit
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
13
3
4.65
1.0
0.22
26.35
3.2
19
3
4.65
1.8
0.22
19.66
8.3
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
Summer: April 1 - Oct 30
Winter: Nov. 1 - March 31

Hickory -Catawba WWTP /NC0025542
O
• U
•
ct
Acji
ct
ct
V--I
U
N
o
N N
O c-I c-I
N
Ol
N
c-I
W
-1
0
N
N
O
m
00
-1
m
N
m
m
lO
0
N
-1
m
N
T -1
Ol
N
# of Samples
J
OA
J
W
CO
J
00
J
W
CO

Hickory -Catawba WWTP /NC0025542
O
• U
•
ct
Acji
ct
ct
V--I
U
N
o
N N
O c-I c-I
N
Ol
N
c-I
W
0
N
N
O
m
00
m
N
N
O
N
N
m
m
lO
0
N
ir
# of Samples
J
OA
J
W
CO
J
00
J
W
CO

Whole Effluent Toxicity Testing and Self Monitoring Summary
V
O
VI
0
Jan Apr Jul Oct
New Hanover
a
E
0
V
0
Z
LL o_ o_ o_
n CO m o
0 0 0 0
V
O
VI
0
N
Feb May Aug Nov
rn
rsi
LL
V
t0
on
00
O
00
O1
[C
New Hanover
N
O
Nn
chr lim: 4.6%
z;
7-1
C
O, m
m 6 m o_
ai ai
n CO m o
0 0 0 0
V
0
0,
Feb May Aug Nov
on
V
f0
m
County: Catawba
NC0025542/001
Catawba WWTP
NonComp: Single
chr lim: 1.5 MGD @ 1
za
n
n CO m o
0 0 0 0 0
V
O
VI
0
N
Mar Jun Sep Dec
NC0038822/001
Central Care WWTP
0'
o-
v
0
O1
E
L
V
O
0
N
0
00
O1
m
d D D D
C
C
O,
n CO m o
0 0 0 0
0
U
0
0,
Mar Jun Sep Dec
W
c
G
f0
m
0
cc
O
00
O1
OC
E
O
V
T
0
O
V
NC0021865/001
Chadbourn WWTP
7Q10: 0.15
cu
CO
V7
a
E
O
V
0
Z
chr lim: 90%
d d d
C a a a 6o LL
n CO m o
0 0 0 0 0
Page 16 of 122
Legend: P= Fathead minnow (Pimphales promelas), H=No Flow (facility is active), s = Split test between Certified Labs

Parameter
Data
Location
00010 - Temperature, Water Deg. Centigre
Average of Value Max of Value Min of Value
Upstream
Effluent
Downstream
00300 - Oxygen, Dissolved (DO)
Upstream
Effluent
Downstream
17.9
18.5
19.6
7.4
8.0
6.8
00900 - Hardness, Total (as CaCO3)
Upstream
Effluent
30675.0
47490.0
27.0
29.0
28.0
15.4
15.1
15.9
35800.0
66300.0
0.0
3.7
2.8
1.4
5.1
1.4
21500.0
37200.0
31616 - Coliform, Fecal MF, MFC Broth, 42
32230 - Chlorophyll A
Upstream
Effluent
Downstream
1757.7
29.8
1456.4
6000.0 88.0
3600.0 1.0
6000.0 11.0
Upstream
Downstream
8.5 14.4 2.0
9.3 14.9 2.0
C0600 - Nitrogen, Total - Concentration
Upstream
Effluent
Downstream
C0665 - Phosphorus, Total (as P) - Conce
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
■
Upstream
Upstream
Effluent
Downstrea m
1.3
7.3
1.0
4.6
30.0
7.3
0.3
0.9
0.2
Total Phosphorus, mg/I
Effluent
0.3
2.8
0.3
0.7
6.4
1.4
0.3
0.3
0.3
Downstream
C0665 - Phosphgirkef80 (aIiatoffliation
Parameter
Location
Average
C0665 - Phosphorus, Total (as P) - Concent Upstream
Effluent
Downstream
Max Min
0.3
2.8
0.3
0.7
6.4
1.4
0.3
0.3
0.3

35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
-. -
Upstream
Total Nitrogen, mg/I
Effluent Downstream
C0600-Nib 8talP8Werlirni3n
Parameter Location Average Max Min
C0600 - Nitrogen, Total - Concentration Upstream 1.3 4.6 0.3
Effluent 7.3 30.0 0.9
Downstream 1.0 7.3 0.2
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Upstream
Temperature, C
Effluent Downstream
00010 - TempIAMFOFWaterNoft. Ce 8-ade
Parameter Location Average Max Min
00010 - Temperature, Water Deg. Centigrad( Upstream 17.9 27.0 0.0
Effluent 18.5 29.0 3.7
Downstream 19.6 28.0 2.8

18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Upstream
Parameter
00300 - Oxygen, Dissolved (DO)
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
DO, mg/I
1
Effluent Downstream
00300 I00300 PaVWDislicA4M (DdYlin
1
Location (Average Max Min
Upstream 7.4 15.4 1.4
Effluent 8.0 15.1 5.1
Downstream 6.8 15.9 1.4
Chlorophyll A, µg/I
■
■
Upstream ■ Average ■ MaxD i4l feam
Location 'Average Max Min
Upstream
Downstrea m
8.5 14.4 2.0
9.3 14.9 2.0

Data
Parameter
Location
Average of Value
Max of Value
Min of Value
31616 - Coliform, Fecal MF, MFC Broth, 42
Upstream
Effluent
Downstream
1757.7
29.8
1456.4
6000.0
3600.0
6000.0
88.0
1.0
11.0
31616 - Coliform, Fecal MF, MFC Broth, 44.5 C Total
234.1888268
6000
1
Parameter
7000.0
6000.0
5000.0
4000.0
3000.0
2000.0
1000.0
0.0
Upstream
Location Average Max Min
Upstream 1757.7 6000.0 88.0
Effluent 29.8 3600.0 1.0
Downstream 1456.4 6000.0 11.0
Fecal Coliform, #/100 ml
■ Averemeril Max ■ Min
Downstream

1 2
Average of Value
Parame Location
00010 - Temperature, Water [ F-Test Two -Sample for Variances
Years
Date
Day Downst Upstream Diff
2016
Jun
1 22 21 1
2 23 23 0
6 22 23 -1
7 22 21 1
8 23 20 3
13 24 22 2
14 24 23 1
15 25 23 2
20 22 24 -2
21 22 22 0
22 24 25 -1
27 25 24 1
28 23 23 0
291 22 22 0
Jul
Aug
Sep
51 23 21 2
6 26 24 2
7 25 24 1
11 25 25 0
12 23 23 0
13 25 25 0
18 25 24 1
19 23 23 0
20 25 24 1
25 25 25 0
26 24 25 -1
27 27 26 1
1 24 23 1
2 25 25 0
3 23 24 -1
8 22 22 0
9 23 22 1
10 25 25 0
15 24 26 -2
16 26 25 1
17 26 25 1
22 24 23 1
23 23 23 0
24 25 25 0
29 24 23 1
30 24 24 0
31 24 23 1
6� 22 21 1
7 23 21 2
8 23 22 1
12 23 22 1
13 22 22 0
14 22 22 0
19 23 23 0
20 23 22 1
Variable 1
Variable 2
Mean
Variance
Observations
df
F
P(F<=f) one -tail
F Critical one-tE
19.58430913
44.57127904
427
426
1.201883182
0.029028083
1.173000352
17.91662763
37.08453508
427
426
Comment: The variance of Variable 1 is higher than the
The variances of the two sets are unequal.
t-Test: Two -Sample Assuming Unequal Variances
Variable 1
Variable 2
Mean
Variance
Observations
Hypothesized N
df
t Stat
P(T<=t) one -tail
t Critical one-tai
P(T<=t) two -tail
t Critical two-tai
19.58430913
44.57127904
427
0
845
3.813585535
7.34637E-05
1.646658895
0.000146927
1.962775363
17.91662763
37.08453508
427
We look at the p-value, two tail. Since we set alpha valL
There is a statistically significant difference between thl

2016
2017
Sep
21
26
27
28
Oct 5
12
19
26
31
Nov
Dec
1
7
14
22
28
5
12
19
27
Jan
3
10
17
23
30
Feb
6
13
20
27
Mar
1
6
13
22
27
Apr
3
10
17
24
May
1
8
15
22
30
Jun
5
6
7
12
13
14
19
20
21
26
27
28
Jul
22 21
22 22
21 21
21 21
16 16
20 18
15 16
8.3 8.1
15 15
17 16
9.3 8.5
10 9.8
4.9 4.4
13 14
6.4 8.3
8.7 9.1
7.4 7.3
9.6 10
9 9.2
5.7 6
7.3 7
10 10
7.1 7.3
5.5 6
5.8 6.3
5.2 6.1
7.8 8.2
6.1 7
11 13
8 8.3
8.2 9.3
8 8.3
11 11
16 16
13 14
17 18
14 14
15 16
14 14
16 18
10 10
12 10
15 13
19 19
20 18
22 22
20 22
22 22
23 23
24 23
24 23
24 21
24 21
24 19
25 23
1
0
0
0
0
2
- 1
0.2
0
1
0.8
0.2
0.5
- 1
- 2
- 0
0.1
- 0
- 0
- 0
0.3
0
- 0
- 1
- 1
- 1
- 0
- 1
- 2
- 0
- 1
- 0
0
0
- 1
- 1
0
- 1
0
- 2
0
2
2
0
2
0
- 2
0
0
1
1
3
3
5
2

2017
2018
Jul
5
6
10
11
12
17
18
19
24
25
26
31
Aug
1
2
7
8
9
14
15
16
21
22
23
28
29
30
Sep
Oct
5
6
7
11
12
13
18
19
20
25
26
27
2
9
16
23
30
Nov
6
15
21
29
Dec
4
13
19
28
Jan
26 23
25 22
26 22
27 23
26 24
26 23
26 21
27 23
27 23
27 23
27 24
26 21
27 22
26 21
24 23
26 22
26 21
27 23
27 23
26 23
27 25
28 25
27 25
26 21
25 20
25 20
24 19
24 20
23 16
22 16
21 16
21 18
23 22
23 20
23 20
22 19
26 25
24 22
15 21
23 22
21 19
20 17
17 11
17 16
13 9
12 6.4
10 5.3
11 8.3
7.2 2.8
8 6.4
5.9 2.5
2 3.7 0
8 3.9
10 1.4
19 2.8 3.6
3
3
4
4
2
3
5
4
4
4
3
5
5
5
1
4
5
4
4
3
2
3
2
5
5
5
5
4
7
6
5
3
1
3
3
3
1
2
-6
1
2
3
6
1
4
5.6
4.7
2.7
4.4
1.6
3.4
3.7
3.9
-1
-1

2018
Jan
22
30
Feb
6
12
20
27
6
13
20
27
Mar
Apr
2
10
17
24
May
1
8
15
23
30
Jun
4
5
6
11
12
13
18
19
20
25
26
27
Jul
2
3
5
9
10
11
16
18
19
23
24
25
30
31
Aug
4.3 4.7
6.5 7.1
5.1 4.7
8.7 14
9.6 11
11 10
10 9
7.9 5.7
12 13
10 10
13 14
13 12
11 10
16 15
12 15
17 17
19 20
21 21
20 20
22 22
21 19
21 19
23 23
22 20
22 20
24 25
24 25
23 22
25 24
23 22
22 22
24 24
24 24
25 24
20 20
26 26
24 24
25 24
25 24
27 25
22 22
25 24
26 25
24 23
27 27
1 26 24
6 26 24
7 25 23
8 25 24
13 25 22
14 25 23
151
24 23
20 25 23
21 25 24
22 22 25
-0
-1
0.4
-5
-1
1
1
2.2
-1
0
-1
1
1
1
-3
0
-1
0
0
0
2
2
0
2
2
-1
-1
1
1
1
0
0
0
1
0
0
0
1
1
2
0
1
1
1
0
2
2
2
1
3
2
1
2
1
-3

2018
2019
Aug
27
28
30
Sep
4
5
6
10
11
12
17
18
19
24
25
26
Oct
2
3
8
9
10
15
16
17
22
23
24
29
30
31
Nov
6
12
19
26
Dec
4
13
17
28
31
Jan
9
14
22
28
Feb
5
11
18
25
Mar
4
11
18
25
Apr
25 22
25 23
25 241
26 24
26 24
26 24
25 22
26 22
25 23
23 22
23 22
23 24
24 21
23 20
23 21
23 21
23 20
23 20
24 21
24 21
23 21
21 16
21 18
21 19
18 12
17 11
17 11
15 12
15 11
15 11
16 15
8.4 13
11 6.9
10 10
9.6 8.9
4.7 4.9
7.8 8
7.5 7.3
11 11
9.2 9.5
6.7 6.5
3 3.1
6.3 6.1
7.6 8.9
7.4 7.5
8 6.9
8.3 8.4
9 9.5
9.3 11
9.9 8
11 11
1 12 10
8 15 16
15 15 16
22 15 13
3
2
1
2
2
2
3
4
2
1
1
- 1
3
3
2
2
3
3
3
3
2
5
3
2
6
6
6
3
4
4
1
- 5
4.1
0
0.7
- 0
- 0
0.2
0
- 0
0.2
- 0
0.2
- 1
- 0
1.1
- 0
- 1
- 2
1.9
0
2
- 1
- 1
2

2019
Apr
29 17 17
May
7
13
20
28
Jun
3
4
5
10
11
12
17
18
19
24
25
26
Jul
1
2
3
8
9
10
15
16
17
22
23
24
29
30
31
Aug
5
6
7
12
13
14
19
20
21
26
27
28
Sep
3
4
5
9
10
11
16
17
18
23
24
19 18
19 19
20 20
23 21
23 20
23 19
24 20
22 20
22 19
18 18
21 21
22 21
21 21
23 21
22 21
23 21
23 23
23 23
23 22
26 23
27 23
23 23
22 22
25 23
25 24
27 24
26 23
25 20
26 22
26 21
26 22
26 21
25 22
22 22
26 22
27 23
26 23
27 23
27 23
27 23
25 20
25 20
24 20
25 21
25 22
25 22
25 21
26 22
26 22
26 21
26 21
22 22
22 19
24 20

2019
2020
Sep
25
30
Oct 1
7
14
21
28
Nov
5
11
18
25
Dec
2
10
16
23
30
Jan
6
17
21
28
Feb
4
10
18
24
Mar
2
9
16
24
30
Apr I 6
13
22
27
May
5
11
18
26
Jun
1
2
3
8
9
10
15
16
17
22
23
24
29
30
Jul
6
7
8
23 19
25 22
25 22
24 18
21 17
18 14
19 15
16 10
15 9.4
12 8.9
10 7.5
10 9.6
9.7 10
8.5 8.5
8.3 8
11 14
6.9 5.8
9.4 8.8
6.2 4.9
L 7 7.8
10 11
8.4 7.6
8.8 9
8.2 8.9
7.9 7.2
7.8 7
12 11
13 13
14 16
15 14
17 17
17 14
16 14
18 17
16 13
19 18
18 18
19 17
19 17
21 19
22 22
23 22
23 22
21 19
19 16
19 16
22 20
22 20
22 20
24 21
24 22
25 21
25 22
26 22
25 22
4
3
3
6
4
4
4
6
5.6
3.1
2.5
0.4
-0
0
0.3
-3
1.1
0.6
1.3
-1
-1
0.8
-0
-1
0.7
0.8
1
0
-2
1
0
3
2
1
3
1
0
2
2
2
0
1
1
2
3
3
2
2
2
3
2
4
3
4
3

2020
Jul
13 27 23
14 27 22
15 27 23
20 27 24
21 26 23
22 26 22
27 27 23
28 26 23
291 26 23
Aug
3
4
5
10
11
12
17
18
19
24
25
26
31
Sep
2
8
9
10
14
15
16
21
22
23
28
29
30
Oct
5
12
19
26
Nov
2
9
16
23
Dec
1
7
15
21
29
26 23
26 22
25 21
26 22
25 22
26 22
24 21
24 21
25 21
24 21
24 25
25 21
26 22
25 22
23 23
20 19
25 20
25 21
24 21
24 20
23 19
21 14
20 14
20 13
21 19
22 20
20 17
18 14
20 18
17 12
18 15
15 11
16 14
15 13
13 12
11
8.6
8.7
8.4
5.1
9.3
8.8
7.9
9.1
5.6
4
5
4
3
3
4
4
3
3
3
4
4
4
3
4
3
3
4
3
-1
4
4
3
0
1
5
4
3
4
4
7
6
7
2
2
3
4
2
5
3
4
2
2
1
1.7
-0
0.8
-1
-1

Average of Value
Years Date
2016
2017
2018
2019
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
2020 Jan
Feb
Mar
Apr
1 2
Parame Location
00010 - Temperature, Water Deg. Centigrade
Downst Upstream
23.07
24.67
24.13
22.25
14.86
10.84
8.025
22.57
24.08
23.87
21.67
14.62
10.54
8.675
7.82 7.9
6.08 6.72
9.24 9.98
15 15.5
13.4 13.6
21.75 20.5
26.23 22.69
26.21 22.43
23 19.42
19.2 18
13 9.175
8.025 5
4.24 3.36
8.6 9.925
9.975 9.425
13.25 12.75
17.8 18.6
22.67 21.92
24.57 24
24.85 23.38
24.42 22.42
20 16.33
11.35 11.23
8.12 8.02
6.3 6.3
7.825 7.925
9.8 9.875
14.8 14.4
20.25 19.5
22 20.17
24.87 22.53
25.58 21.83
24.62 21.08
21.4 17.2
13.25 8.95
9.5 10.02
7.375 6.825
8.85 9.125
10.94 10.84
16.25 14.75

2020 May 17.75 16.5
Jun 21.43 19.5
Jul 26.15 22.54
Aug 25.08 21.85
Sep 22.36 18.71
Oct 18.25 14.75
Nov 14.75 12.5
Dec 8.36 8.14

Sum of Value
Jun
Jul
e upstream and downstream T
Sep
1
2
6
7
8
13
14
15
20
21
22
27
28
29
5
6
7
11
12
13
18
19
20
25
26
27
1
2
3
8
9
10
15
16
17
22
23
24
29
30
31
6
7
8
12
13
14
19
20
2
Parameter Location
00300 - Oxygen, Dissolved (DO)
Downstream Upstream
6.3 7.3
6.5 6.2
8.4 6
6.6 8
6 6.9
7.6 8
6.2 6.1
5.7 6
7 5.9
6.3 6.4
6.3 6.5
6.1 5.9
6.2 6
6.4 6.2
6.4
6.3
6.2
6.3
6.3
6.2
6.2
5.3
5.1
6.4
6.4
5.6
6.2
6.2
6.2
6.3
6.4
6.3
6.2
9.2
6.8
6.2
6.4
5.8
6.5 6.8
6.3 6.2
6.2 6.4
6.8 9
6.6 6.5
6.2 6.3
4.7 4.9
4.7 5
4.5 5.4
4.6 5.9
3.9 5.7
4.5 4.5
4.4 5.2
4.8 4.5
4.9 5.8
4.7 5.8
4.8 5.6
5.1 5.2
4.3 5I
1.4 6
5.6 7.4
5.5 2.4
2.9 5
Diff
-1
0.3
2.4
-1.4
-0.9
-0.4
0.1
-0.3
1.1
-0.1
-0.2
0.2
0.2
0.2
0.2
0.1
0
0
-0.1
-0.1
0
-3.9
-1.7
0.2
0
-0.2
-0.3
0.1
-0.2
-2.2
0.1
-0.1
-0.2
-0.3
-0.9
-1.3
-1.8
0
-0.8
0.3
-0.9
-1.1
-0.8
-0.1
-0.7
-4.6
-1.8
3.1
-2.1

2016 Sep
2017
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
21
26
27
28
5
12
19
26
31
1
7
14
22
28
5
12
19
27
3
10
17
23
30
1
6
13
20
27
1
6
13
22
27
3
10
17
24
1
8
15
22
30
5
6
7
12
13
14
19
20
21
26
27
28
Jul 3
4.2 4.91
5.9 6.3
7 7.4
4.9 6
6.2 7.2
6.3 6.3
6.2 6.3
7 6.9
8.1 8.8
7.2 8.8
5.9 6
6.2 6.2
8.9 10.3
6.4 6.3
6.4 6.4
6.3 6.2
6.2 6.3
6.2 6.2
6.4
6.3
6.2
6.3
6.2
6.4
6.3
6.2
6.3
6.3
6.2
5.9
5.2
5.1
6.1
6.2
5.9
5.1
5.1
6.1
6.2 6.2
5.4 5.4
6.1 6.2
5.7 6
5.6 5.8
5.1 5.2
5.8 5.9
5.2 5.2
5.9 6
5.2
5.2
5.2
5.9
5.8
5.21
5.3
5.2
5.9
5.9
5.6 5.5
5.2 5.3
5.3 5.3
7.4 7
5.1 5.2
6.2 6.8
5.2 5.4
4.6 5.3
5.5 6
6 4.9
4.5 5.6
5.5 6.6
6.2 6
- 0.7
- 0.4
- 0.4
- 1.1
-1
0
- 0.1
0.1
- 0.7
- 1.6
- 0.1
0
- 1.4
0.1
0
0.1
- 0.1
0
0
0
0
0
- 0.1
0
0
0.1
0
0
0
0
- 0.1
- 0.3
- 0.2
- 0.1
- 0.1
0
- 0.1
0
- 0.1
0
0
- 0.1
0.1
- 0.1
0
0.4
- 0.1
- 0.6
- 0.2
- 0.7
- 0.5
1.1
- 1.1
- 1.1
0.2

2017
Jul
Aug
Sep
Oct
Nov
Dec
2018 Jan
5
6
10
11
12
17
18
19
24
25
26
31
1
2
7
8
9
14
15
16
21
22
23
28
29
30
5
6
7
11
12
13
18
19
20
25
26
27
2
9
16
23
30
6
15
21
29
4
13
19
28
7.1
5.8
5.2
5.8
7.8
4.7
5.1
5.3
3.9
4.7
4.6
5.1
6.2
5.1
7
6.1
6.7
6.6
7.5
7.1
6.4
6.7
6.4
6.8
5.1 6.5
6.1 6.9
6.9 7.4
6 7.7
6.1 8
5.8 7.2
6.3 7.9
6 9.7
4.8 5.9
5 5.8
5.1 6.7
4.9 6.9
5.9 7.5
5.5 6.8
6.3 7.9
5.4 6.8
5.7 8.2
6.7 8.3
7.4 8.1
6.8 7.4
6.2 6.4
5.3 6.9
6.3 7.3
6.4 6.9
5.9 6.3
5.3 7
7.8 5.6
6 5.8
6.1 5.8
5.7 5.2
6.9 7.9
7.6
8.3
8.3
8.7
7.8
8.1
9.2
11.1
8 11
9.7 11.4
11.2 11.2
10 13.3
10.5 151
8 10.7
10 15.4
19 12.5 13.9
0.9
0.7
- 1.8
- 0.3
1.1
- 1.9
- 2.4
- 1.8
- 2.5
- 2
- 1.8
- 1.7
- 1.4
- 0.8
- 0.5
- 1.7
- 1.9
- 1.4
- 1.6
- 3.7
- 1.1
- 0.8
- 1.6
- 2
- 1.6
- 1.3
- 1.6
- 1.4
- 2.5
- 1.6
- 0.7
- 0.6
- 0.2
- 1.6
- 1
- 0.5
- 0.4
- 1.7
2.2
0.2
0.3
0.5
- 1
- 0.2
0.2
- 0.9
- 2.4
- 3
- 1.7
0
- 3.3
- 4.5
10.7
-15.4
- 1.4

2018
Jan
Feb
Mar
Apr
May
Jun
Jul
22 12 9.1
30 11.7 10.6
6
12
20
27
6
13
20
27
2
10
17
24
1
8
15
23
30
4
5
6
11
12
13
18
19
20
25
26
27
2
3
5
9
10
11
16
18
19
23
24
25
30
31
Aug 1
6
7
8
13
14
15
20
21
22
15.9
12.4
10.7
10
9.4
9.6
9.4
11
15.1
10.4
10.8
9.9
12.4
10.3
8.6
10
10.6 9.2
11.2 10.6
9.8 10.8
8.4 9.1
9.1 8.5
7 9.1
9.3 9.4
7.5 7.6
6.8 7
7.4
7.1
7.1
7.3
8.8
6.2
6.4
6.5
8.1
6.3
6.4
6.5
7.6
7.7
7.6
7.8
6.3
6.5
6.8
6.7
7.5
6.6
6.6
6.3
6.4
6.3
6.5
6.3
6.1
6.5
6.4
6.3
8.4
6.5
6.5
6.5
6.4
6.1
6.3
6.4
6.2
6.7
6.2
6.6
6.3
6.2
8.2
6.4
6.4
6.4
6.2
6.3
6.8
6.1
6.7
6.8
4
6
5.5
5.5
4.9
5.7
6.2
6.5
6.51
6.4
5.3
4.5I
4.3
1.4
4.9
4.9
2.9
1.1
0.8
2
- 0.1
0.1
- 3
- 0.7
0.8
1
1.4
0.6
- 1
- 0.7
0.6
- 2.1
- 0.1
- 0.1
- 0.2
- 0.2
- 0.6
- 0.5
- 0.5
2.5
- 0.3
- 0.4
- 0.2
0.6
- 0.3
- 0.2
0.2
0.1
- 0.1
0.3
- 0.4
- 0.1
- 0.1
0.1
0.1
0.2
0.1
0.1
0.1
0.2
- 0.2
0.6
- 0.4
0.2
0.4
- 1.3
1.5
1.2
4.1
0
0.8

2018
2019
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
27 5 4.6
28 5.8 5.6
30 5.6 2.3
4
5
6
10
11
12
17
18
19
24
25
26
1
2
3
8
9
10
15
16
17
22
23
24
29
30
31
6
12
19
26
4
13
17
28
31
9
14
22
28
5
11
18
25
4
11
18
25
3.5 4.8
4.2 4.9
4.3 4.9
4.3 4.8
4.8 5.4
4.8 5.4
5.2 7
4 6.6
4.1 6.1
5.2 7.1
4.9 6.4
4.4 5.9
4.8 5.7
5 5.4
5 5.1
4.6 5.3
4.3 6.4
5.5 6.3
5.7 6.3
5.9 7
5.7 7.1
7.3 8.6
6 8.6
6 8.5
6.3 8.3
6.4 8.8
7.2 9.7
6.5
9.8
9.9
10
7.1
7.3
10.7
9.8
9 9.6
11.1 11.6
9.8 10.6
11 12.2
10.6 10.8
8.7 9.2
11.7 12
10.7 10.9
10.9 10.9
11.2
10.2
10.5
10.7
11.9
10.6
11.6
10.9
8.4
10.7
9.8
10.8
10.1
9.8
8.7
10.5
1 8.6 8.2
8 9.9 10.4
15 8.4 7.9
22 7.6 9.2
0.4
0.2
3.3
- 1.3
- 0.7
- 0.6
- 0.5
- 0.6
- 0.6
- 1.8
- 2.6
- 2
- 1.9
- 1.5
- 1.5
- 0.9
- 0.4
- 0.1
- 0.7
- 2.1
- 0.8
- 0.6
- 1.1
- 1.4
- 1.3
- 2.6
- 2.5
- 2
- 2.4
- 2.5
- 0.6
2.5
- 0.8
0.2
- 0.6
- 0.5
- 0.8
- 1.2
- 0.2
- 0.5
- 0.3
- 0.2
0
- 0.7
- 0.4
- 1.1
- 0.2
- 1.7
0.9
1.1
0.3
0.4
- 0.5
0.5
- 1.6

2019
May
Jun
Jul
Aug
7
13
20
28
3
4
5
10
11
12
17
18
19
24
25
26
1
2
3
8
9
10
15
16
17
22
23
24
29
30
31
5
6
7
12
13
14
19
20
21
26
27
28
3
4
5
9
10
11
16
17
18
23
24
8 8.1
7.6
6.4
6.3
6.2
8.1
7.1
7.3
7.1
5.3
6.2
6.1
6.7
6.1
6.4
6.9
6.7
6.6
5.6
5.1
4.8
6.2
6.5
6.2
6.7
6.8
6.8
7.1
6.9
6.5
5.9
5.6
5.6
5 5.4
6.1 6.3
6 5.7
6.2 6.4
5.7 6
6.2 6.4
6.3 6.1
5.9 6.2
5.1 5.2
5.3 6
5.1 5.8
6.1 6.2
4.9 5.6
5.5 5.1
4.6 5.1
4.6 5.4
4.7 6.2
4.1 5.4
4.2 5
4.4 5
3.7 5.4
3.9 5
3.9 5.6
3.6 4
6.3 7.1
5.3 6.5
5.1 6.4
5.6 6.6
5.4 6.4
5 6.2
4.2 6.1
3.7 5.3
4 5.2
4.8 4.7
4.4 4.9
5.5 5.7
5 5.8
5.1 6.1
- 0.1
- 0.5
- 0.7
- 1
- 0.9
- 0.9
- 0.3
- 0.1
0
- 0.7
- 0.4
- 0.2
- 0.2
0.1
- 0.3
- 0.5
- 0.8
- 0.4
- 0.2
0.3
- 0.2
- 0.3
- 0.2
0.2
- 0.3
- 0.1
- 0.7
- 0.7
- 0.1
- 0.7
0.4
- 0.5
- 0.8
- 1.5
- 1.3
- 0.8
- 0.6
- 1.7
- 1.1
- 1.7
- 0.4
- 0.8
- 1.2
- 1.3
- 1
- 1
- 1.2
- 1.9
- 1.6
- 1.2
0.1
- 0.5
- 0.2
- 0.8
- 1

2019
2020
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
25 4.9 5.8
30 5.7 6
1
7
14
21
28
5
11
18
25
2
10
16
23
30
6
17
21
28
4
10
18
24
2
9
16
24
30
6
13
22
27
5
11
18
26
1
2
3
8
9
10
15
16
17
22
23
24
29
30
1
6
7
8
5 6.4
5.3 6.1
5.8 6.7
6.3 7.1
6.4 7.7
6 7.7
7.7 10.3
8 9.3
8.7 10.7
9.6
9.6
9.9
10.6
11.3
11.7
10.4
11.6
11.3
9.7
10
9.8
9.4
10.4
12.2
9.8
12.2
11.7
11.4 11.2
10.4 10.2
10.7 10.9
11.8 12
10.5
10.8
9.7
10.2
7.8
11.4
11.2
10.3
11.4
7.3
9.3 10
7.6 8.1
8.4 11.3
7 9.2
8.1
8.2
8.7
8.3
8.4
9.7
8.2
7.8
7.4 8.21
8.3 8.7
7.7 8
7.3 7.5
7.2 7.8
7.4 7.7
7.3 7.8
8 8.7
7.8 8.9
7.7 8.4
7.2 8.4
7.6 8.6
8.2 8.7
7.1 7.7
7.2 7.6
8.4 8
7.5 7.9
7.7 7.6
- 0.9
- 0.3
- 1.4
- 0.8
- 0.9
- 0.8
- 1.3
- 1.7
- 2.6
- 1.3
- 2
- 2.1
- 0.8
- 1.7
- 0.7
1.6
- 2.2
0
- 2.8
- 1.3
0.2
0.2
- 0.2
- 0.2
- 0.9
- 0.4
- 0.6
- 1.2
0.5
- 0.7
- 0.5
- 2.9
- 2.2
- 0.3
- 1.5
0.5
0.5
- 0.8
- 0.4
- 0.3
- 0.2
- 0.6
- 0.3
- 0.5
- 0.7
- 1.1
- 0.7
- 1.2
- 1
- 0.5
- 0.6
- 0.4
0.4
- 0.4
0.1

2020
Jul
Aug
Sep
Oct
Nov
Dec
13
14
15
20
21
22
27
28
29
3
4
5
10
11
12
17
18
19
24
25
26
31
1
2
8
9
10
14
15
16
21
22
23
28
29
30
5
12
19
26
2
9
16
23
1
7
15
21
29
8 7.1
7.5 7.9
7.1 7.3
7.1 6.8
7.2 7.7
7.2 7.5
5.8 7.5
6 7.2
6.2 7.2
5.5 6.3
5.9 8
5.4 7.9
6.5 6.3
6.4 6
6.4 6.7
6.9 7.5
7 7.5
8.5 9.5
6.5 7.2
6.6 6.5
6.4 7
5.9 5.8
6.2 7.8
7.2 7.3
6 5.9
6.2 6.6
6.5 7.6
5.3 7.4
6.1 7.6
6.3 7.8
6.7 9
6.8 9.3
6.9 9
7.4 8.2
7.5 8.6
7.8 8.5
8.2
7.5
7.7
6.9
10.1
8.7
10.3
8.7
6.5
7.5
6.9
7.9
8.7
8.4
8.3
10.6
8.6
10.1
9.4
10.9
11.4
10.4
10.3
10.1
10.7
11.8
0.9
- 0.4
- 0.2
0.3
- 0.5
- 0.3
- 1.7
- 1.2
- 1
- 0.8
- 2.1
- 2.5
0.2
0.4
- 0.3
- 0.6
- 0.5
- 1
- 0.7
0.1
- 0.6
0.1
- 1.6
- 0.1
0.1
- 0.4
- 1.1
- 2.1
- 1.5
- 1.5
- 2.3
- 2.5
- 2.1
- 0.8
- 1.1
- 0.7
- 1.9
- 1.2
- 2.6
- 1.8
- 2.2
- 0.9
- 1.4
- 2.7
- 1.8
- 0.2
- 0.7
0.2
- 0.4

F-Test Two -Sample for Variances
Variable 1 Variable 2
Mean 7.364637002 6.768384075
Variance 4.162244175 3.752448791
Observation: 427 427
df 426 426
F 1.109207455
P(F<=f) one- 0.142592142
F Critical onE 1.173000352
Comment:
We accept the null hypothesis. The variances of the two sets are equal.
t-Test: Two -Sample Assuming Equal Variances
Variable 1 Variable 2
Mean 6.768384075 7.364637002
Variance 3.752448791 4.162244175
Observation: 427 427
Pooled Varia 3.957346483
Hypothesize( 0
df 852
t Stat -4.379529195
P(T<=t) one- 6.68678E-06
t Critical one 1.646644046
P(T<=t) two- 1.33736E-05
t Critical two- 1.962752233
We look at the p-value, two tail. Since we set alpha value at 0.05, if the p-value is less than 0.05, we can
There is statistically significant difference between the upstream and downstream DO

Sum of Value
Year
2016
See James' nutrient study
1 2 Nick - Have you had a permit th
Parameter Location TNxTMFx8.34, Ib/mo
CO600 - Nitrogen, Total - Concentration
Date Day Downstream Upstream
Jun
Jul
Aug
1
6
15
22
29
6
13
20
27
3
10
17
24
31
Sep
Oct
7
14
21
28
Nov
1
Dec
5
2017 Jan
3
Feb
1
Mar
1
Apr
3
Ma
Jun
5
19
Jul
5
19
Aug
2
16
Sep
say that there is a statisti
Oct
2018
Nov
Dec
Jan
Feb
Mar
Apr
Ma
5
19
Jun
2
6
4
2
6
6
2
5
19
Jul
10
24
Aug
7
21
Sep
0.84 1.7
0.67 0.27
0.29 1.1
0.91 1.2
1.1 0.89
7.3 1.2
1.8 1.7
0.71 0.65
0.81 0.79
0.94 1.1
1 1
2.6 1.2
0.82 1.1
1.1 0.81
0.76 1
1.1 0.99
1.4 0.87
0.57 0.54
0.62 0.61
1.4 0.62
0.75 0.72
1 1.2
1.2 1.3
0.97 0.91
3.9 4
1.2 1.2
0.42 1.4
0.73
0.37
1.5
1.3
0.78
0.19
1
1.7
0.37
0.29
1.1
0.91
0.79
0.52
0.52
0.52
1.2
0.52
0.52
0.52
0.42
0.77
0.58
1.2
1.8
0.72
0.65
1.4
0.54
0.52
1
1.1
0.52
0.53
0.83
1.1
1.1
0.52
0.52 0.66
0.52 0.97

2018
Sep
18
0.52 1.3
Oct
2
0.52 0.75
Nov
6
0.52 0.89
Dec
4
0.83 1
2019
Jan
9
0.81 1.3
Feb
5
0.92 1.2
Mar
5
1.2 1.4
Apr
1
0.96 1.3
May
7
1.3 1.9
Jun
4
0.65 1.4
18
0.85 1.7
Jul
9
0.78 1.5
23
1.3 1.8
Aug
6
1 2.3
20
0.94 4.1
Sep
3
0.66 1.3
17
1 1.5
Oct
1
0.64 1.7
Nov
5
0.81 1.1
Dec
2
0.78 1.7
2020
Jan
6
1 1.6
Feb
4
0.91 2.9
Mar
9
1.2 1.8
Apr
6
0.56 0.91
May
5
1.1 3.4
Jun
1
1 1.2
16
0.89 0.69
Jul
6
1 2
21
1.3 2.4
Aug
4
0.93 4.6
17
1.5 1.6
Sep
1
1.2 1.2
14
1.1 1.7
Oct
19
0.58 1.1
Nov
10
0.77 2.3
Dec
7
1.1 1.3

https://pubs.usgs.gov/wri/wri034191/pdf/newrir03-4191.pdf
at collects upstream and downstream TN and TP, if yes, can you please share the permit number? I would like tc
Diff F-Test Two -Sample for Variances
- 0.86
0.4 Variable 1 Variable 2
- 0.81 Mean 0.969411765 1.344
- 0.29 Variance 0.720891317 0.586429048
0.21 Observations 85 85
6.1 df 84 84
0.1 F 1.229289919
0.06 P(F<=f) one -tail 0.173002223
0.02 F Critical one -tail 1.43472934
- 0.16
0
1.4
- 0.28
0.29 Comment: The variance of Variable 1 is higher than the variance of Variable 2. As a re:
- 0.24 We accept the null hypothesis. The variances of the two sets are equal.
0.11
0.53
0.03 t-Test: Two -Sample Assuming Equal Variances
0.01
0.78 Variable 1 Variable 2
0.03 Mean 0.969411765 1.344
- 0.2 Variance 0.720891317 0.586429048
- 0.1 Observations 85 85
0.06 Pooled Variance 0.653660182
- 0.1 Hypothesized Mean D 0
- 0.1 df 168
0 t Stat -3.020456483
- 0.98 P(T<=t) one -tail 0.001459214
- 0.77 t Critical one -tail 1.653974208
- 0.93 P(T<=t) two -tail 0.002918429
- 0.22 t Critical two -tail 1.974185191
- 1.51
- 0.73
- 0.62 We look at the p-value, two tail. Since we set alpha value at 0.05, if the p-value is less
0.37
- 0.25
- 0.06 There is statistically significant difference between the upstream and downstream TN
- 0.68
- 0.6
- 0.2
- 0.13
- 0.88
- 0.46
- 0.58
- 0.31
- 0.57
0.58
- 0.14
- 0.45

see what analysis pw perform on this data (before handling the package to MT.)(ie., does it make sense to ca
Sum of Value
Year
2016
Date
Jun
Jul
Aug
cult, Excel calculates the correct F
Sep
Oct
Nov
Dec
2017
Jan
Feb
Mar
Apr
than 0.05, we can sa
2018
Jun
Jul
Aug
Sep
that there
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Jun
Jul
Aug
Sep
Parameter Location
CO665 - Phosphorus, Total (as P) - Concentration
Day
Downstream Upstream
6
15
22
29
6
13
20
27
3
10
17
24
31
0.3
0.3
0.3
0.3
0.3
1.4
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
7
14
21
28
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
5
0.3 0.3
1
0.31 0.3
5
0.3
0.3
3
0.3
0.3
1
0.3
0.3
1
0.3
0.3
3
0.7
0.68
0.3
0.3
5
19
0.34
0.3
0.32
0.3
5
19
0.3
0.3
0.3
0.3
2
16
0.3
0.3
0.3
0.3
5
19
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
5
19
0.3
0.3
0.3
0.3
10
24
0.3
0.3
0.3
0.3
7
22
0.3 0.3
0.3 0.3
0.3
0.3
Diff
0
0
0
0
0
1.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0.01
0
0
0
0
0.02
0
0.02
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

2018
Sep
18
0.3 0.3
Oct
2
0.3 0.3
Nov
6
0.3 0.3
Dec
4
0.3 0.3
2019
Jan
9
0.3 0.3
Feb
5
0.3 0.3
Mar
4
0.3 0.3
Apr
1
0.3 0.3
May
7
0.3 0.3
Jun
4
18
0.3 0.3
0.3 0.3
Jul
9
23
0.3 0.3
0.3 0.3
Aug
6
20
0.3 0.3
0.3 0.3
Sep
3
17
0.3 0.3
0.3 0.3
Oct
1
0.3 0.3
Nov
5
0.3 0.3
Dec
2
0.3 0.3
2020
Jan
6
0.3 0.3
Feb
4
0.3 0.3
Mar
9
0.3 0.3
Apr
6
0.3 0.3
May
5
0.3 0.3
Jun
1
15
0.3 0.3
0.3 0.3
Jul
6
21
0.3 0.3
0.3 0.3
Aug
4
17
0.3 0.3
0.3 0.3
Sep
1
14
0.3 0.3
0.3 0.3
Oct
5
0.3 0.3
Nov
10
0.3 0.3
Dec
7
0.3 0.3

ilculate lb/month lb/year?)
F-Test Two -Sample for Variances
Variable 1 Variable 2
Mean 0.318235294 0.304705882
Variance 0.015993277 0.001701401
Observation: 85 85
df 84 84
F 9.400065854
P(F<=f) one- 2.84817E-21
F Critical onE 1.43472934
Comment: The variance of Variable 1 is higher than the variance of Variable 2. As a result, Ex
We accept the null hypothesis. The variances of the two sets are unequal.
t-Test: Two -Sample Assuming Unequal Variances
Variable 1 Variable 2
Mean 0.318235294 0.304705882
Variance 0.015993277 0.001701401
Observation: 85 85
Hypothesize) 0
df 102
t Stat 0.93770676
P(T<=t) one- 0.175305094
t Critical one 1.659929976
P(T<=t) two- 0.350610188
t Critical two- 1.983495259
We look at the p-value, two tail. Since we set alpha value at 0.05, if the p-value is less than 0.1
There is not statistically significant difference between the upstream and downstream TP

Sum of Value
Year
2016
Jun
Jul
Aug
cel calculates the correct
Sep
Oct
Parameter Location
32230 - Chlorophyll A
Day Downstream Upstream
1
8
15
22
29
6
13
20
27
3
10
17
24
31
7
14
21
28
Nov
Dec
1
5
2017
Jan
Feb
Mar
Apr
Ma
3
1
1
3
Jun
5
19
Jul
10
24
Aug
2
16
Sep
05, we can say that there
2018
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
5
19
Jun
2
6
4
4
6
6
2
8
5
19
Jul
10
24
Aug
7
21
Sep
6.57
11.7
3.55
12.3
14.9
10.4
11.6
11.4
7.43
10.9
14.2
12.5
8.41
8.77
14.4
10.2
4.77
11.9
6.52
9.05
10.9
9.83
10.6
12.7
10.1
6.92
9.05
4.84
11.5
6.98
6.03
8.9
10.9
7.51
9.94
9.1
7.54
6.98
6.56
7.89
8.91
10.2
11
9.29
5.83
9.16
6.5
6.86
7.69
8.61
9.94
8.34
12.2 9.25
12.2 9.41
10.8 9.64
11.7 9.5
12.6 9.15
11.6 12.8
11.8 8.97
9.78 9.32
8.38
8.08
9.65
9.31
7.18
7.47
10.9
8.58
9.54
10.6
8.34
8.78
6.89
6.65
10.7
9.2
10.1 9.01
9.48 9.67
12.8 11.4
12.4 8.99
11.7 11.2
8.28 7.83
8.97 8.7
Diff
- 7.83
1.5
- 1.22
0.4
8.38
1.35
0.7
1.57
- 3.17
- 1.8
4.1
5.58
- 0.64
3.93
0.6
- 0.53
- 3.91
- 0.2
1.71
- 2.18
0.06
1.03
1.22
1.59
1.06
0.95
2.95
2.79
1.16
2.2
3.45
- 1.2
2.83
0.46
- 1.16
- 2.52
1.31
0.53
0.29
0.82
0.2
- 0.62
1.09
- 0.19
1.4
3.41
0.5
0.45
0.27

2018
Sep
18
9.12 7.57
Oct
2
10.6 10.9
Nov
6
10 8.81
Dec
4
7.53 9.48
2019
Jan
9
8.3 5.35
Feb
5
6.32 5.24
Mar
4
6.63 6.62
Apr
1
9.07 7.7
May
7
6 4.5
Jun
4
7.84 10.6
18
11.5 8.64
Jul
9
11.8 8.3
23
11.8 6.58
Aug
6
8.75 7.14
20
13.1 6.91
Sep
3
6.01 6.48
17
6.86 12
Oct
1
10 6.27
Nov
5
7.65 5.18
Dec
2
5.88 6.41
2020
Jan
6
4.7 3.56
Feb
18
7.16 5.21
Mar
9
8.07 9.02
Apr
6
11.8 10.5
May
5
11.1 12.2
Jun
2
12 5.15
16
12 10.7
Jul
6
8 13.1
21
8.33 5.34
Aug
4
11.7 9.49
17
9.31 8.34
Sep
1
11.6 12.8
14
8.84 8.66
Oct
5
8.57 6.64
Nov
10
2 2
Dec
7
2 2
1.55
-0.3
1.19
-1.95
2.95
1.08
0.01
1.37
1.5
-2.76
2.86
3.5
5.22
1.61
6.19
-0.47
-5.14
3.73
2.47
-0.53
1.14
1.95
-0.95
1.3
-1.1
6.85
1.3
-5.1
2.99
2.21
0.97
-1.2
0.18
1.93
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

F-Test Two -Sample for Variances
Variable 1 Variable 2
Mean 9.344823529 8.506941176
Variance 6.470180028 6.022916723
Observation: 85 85
df 84 84
F 1.074260251
P(F<=f) one- 0.371739399
F Critical onE 1.43472934
Comment: The variance of Variable 1 is higher than the variance of Variable 2. As a result, Excel calc
We accept the null hypothesis. The variances of the two sets are equal.
t-Test: Two -Sample Assuming Equal Variances
Variable 1 Variable 2
Mean 9.344823529 8.506941176
Variance 6.470180028 6.022916723
Observation: 85 85
Pooled Varia 6.246548375
Hypothesize( 0
df 168
t Stat 2.185533435
P(T<=t) one- 0.015116895
t Critical one 1.653974208
P(T<=t) two- 0.03023379
t Critical two- 1.974185191
We look at the p-value, two tail. Since we set alpha value at 0.05, if the p-value is less than 0.05, we
There is statistically significant difference between the upstream and downstream Chlorophyll A

Sum of Value
Year
2016
Date
Jun
ulates the correct F value,
2
Parameter Location
31616 - Coliform, Fecal MF, MFC Broth, 44.5 C
Day Downstream Upstream
1
2
6
7
8
13
14
15
20
21
22
27
28
29
Jul
5
6
7
11
12
13
18
19
20
25
26
27
Aug
;an say that there is a stat
Sep
1
2
3
8
9
10
15
16
17
22
23
24
29
30
31
127 6000
1600 1000
580 88
38 547
40 500
23 180
26 225
26 223
11 177
100 155
220 183
120 203
6000 6000
2200 2600
1400 3100
5700 5300
800 600
310 300
6000 6000
6000 6000
1800 1000
500 570
380 6000
390 280
460 580
300 540
6000 6000
3300 3900
6000 6000
6000 6000
6000 6000
1900 1388
338 540
373 430
270 360
3200 4000
593 620
313 407
200 420
213 220
100 187
6 283 300
7 195 213
8 87 390
12 150 135
13 175 1000
14 240 150
19 140 110
20 200 185
Diff
-5873
600
492
-509
-460
-157
-199
-197
-166
-55
37
-83
0
-400
-1700
400
200
10
0
0
800
-70
-5620
110
-120
-240
0
-600
0
0
0
512
-202
-57
-90
-800
-27
-94
-220
-7
-87
-17
-18
-303
15
-825
90
30
15

2016
Sep
21 1100 520
26 3600 6000
27 6000 6000
28 1500 1300
Oct
5
12
19
26
31
220 190
220 280
125 115
84 125
200 110
580
-2400
0
200
30
-60
10
-41
90
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

F-Test Two -Sample for Variances
Variable 1 Variable 2
Mean 1757.689655 1456.37931
Variance 5326569.481 4466157.257
Observation: 58 58
df 57 57
F 1.192651574
P(F<=f) one- 0.254073626
F Critical onE 1.55175754
860412.2
Comment: The variance of Variable 1 is higher than the variance of Variable 2. As a result, Excel calculates the co
We accept the null hypothesis. The variances of the two sets are equal.
t-Test: Two -Sample Assuming Equal Variances
Variable 1 Variable 2
Mean 1757.689655 1456.37931
Variance 5326569.481 4466157.257
Observation: 58 58
Pooled Varia 4896363.369
Hypothesize( 0
df 114
t Stat 0.733290775
P(T<=t) one- 0.232443182
t Critical one 1.658329969
P(T<=t) two- 0.464886363
t Critical two- 1.980992298
We look at the p-value, two tail. Since we set alpha value at 0.05, if the p-value is less than 0.05, we can say that t
There is not statistically significant difference between the upstream and downstream DO

N
(B
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
w
a
Limit Violation
VIOLATION ACTION
VIOLATION TYPE
PARAMETER
LOCATION
N > > > (/) 0 > N N N N
as as
O D U U O as m W z O U O U O U O U
-O c O O O _ -O c -O C -O c
N N c 0 "' a) N a) a) N N a) a)
U E -O -O -O O '- -O N E N E N E N E
O o w aoi aoi %) aoi o 2 0 2 2 0
d i U U < 0 i a i a i a i
o O O O o m O o 0 0 0
c d a d z U d c c c c
w w w w w
Proceed to
Enforcement Case
a) a) a) a) a) a) a) a) a) a) a)
a) a) a) a) ii a) ii a) ii a) ii a) ii a) ii a) ii a)
ii
a`) a) a`) a) a`) a) a`) a) a`) a) a`) a) a`W a) a`W a) a`) a) a) a) a`) a)
> 'O > 'O > 'O > 'O > 'O > 'O > 'O > 'O > 'O > 'O > 'O
< a) < a) < a) < a) < a) < a) < a) < a) < a) < a) < a)
>, a) >, a) _T a) >, a) >, a) >, a) _T _T a) a) _T a) a)
U U U U U U U U U U U
-c X -c X Y X -c X -c X -c X Y X Y X -c X Y X -c X
c w c w N w c w c w c w N w N w c w N w c w
o o
Proceed to NOD
Proceed to NOD
Proceed to NOV
O O O
Z Z Z
ED ED E -O
0 7 0 7 0
E € E € E s
c m c m c m
VIOLATION ACTION
VIOLATION TYPE
O O O) l() O O O N Co. N- O
co 0
co c‘s
w
1 w
M co N co crs N O M N- Oa) N co co co J❑
M N I� M N N O W Ln N N N N U
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J
act
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) H U)
E E E E E E E E E E E E E E Z W
>-
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Y Y Y Y Y Y Y Y Y Y Y Y Y Y z
a) a) a) a) a) a) a) a) a) a) a) a) a) a) w
a) a) a) a) a) a) a) a) a) a) a) a) a) a) D
0
X X X X X X X X X X X X X X a
M M M M M M M M M M M M M M a
z
� N— rn as rn c) c) c) c) c) c) N- N- N- O
N N N N N N I- F
\ O CO Co - — 00 In aii V — N M a Q
co co — N CO CO 0 7 N .— co 7 O d❑
V N N CVN N N M M CO CO N- �
0 0 0 0 0 0 0 0 0 0 0 0 0
...O
6 6 6 6 6 6 6 6 6 6 6 c❑F O F O F O F F2FFFF F O 2=====2 01K3.asm.asm
.as.asm a)
O G) O O O O O O O O O O W O
o E o E o E o E o E o E o E o E o E o E o E
U U U U U U U U U U U
E o E o E o E o E o E o E o E o E o E o E o
< U < U < U < U < U < U < U < U < U < U < U
c c c c c c c c c c c (7
rn rn rn rn rn rn rnZ CDCDCDCDx
O O O O O O O O O O O
z z z z z z z z z z z
Oxygen, Dissolved (DO)
Oxygen, Dissolved (DO)
.. .. .. .. .. .. .. .. .. .. .. .. .. ..
c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a)
- - - - - - - - - - - - - w w w w w w
w w w w w w w w
w w w w w w w w w w w w w w
PARAMETER
LOCATION
J
a
c F
c, c, c, O O c, c, c, c, c, c, c, c, O O
O O O O O O O O O O O O O O 0
O_
I— N- as O) O) O O O O O O I— N- N- >
N N N N N N Z H
O 0 0 0 0 0 0 0 0 0 0 0 0 0 a s
N N N N N N N N N N N N N N — 0 0
1 1 1 1 1 1 1 1 1 1 1 1 1 1 Q I- a
V N N CV N N N M M CO co Z In
O O O O O O O O 0 0 0 0 O c O a
o

0
(B
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
LL
0
O D
0
o_ O
zF
00
o I- a
2 In
o 0 Ct
• D D 0 0 0 0
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w o w o w o w o w o w o w o w o w o w o w o aD
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
as as as as as as as as as as as as as as as as
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O O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
N N N N N N N N N N N N N N N N

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
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as
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z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
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as as as as as as as as as as as as as as as as
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N N N N N N N N N N N N N N N N
N N N N N N N N
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
C F
O D
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o_ O
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c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s • To 4 s
0 • 0 0 • 0 0 • 0 0 • 0 0 0 • 0 0 • 0 0 • 0 0
a) a) - a) a) - a) a) - a) a) - a) a) a) - a) a) - a) a) - a)
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g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m E m
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N N N N N N N N N N N N N N N N
M M M M M M M M
O O O O O O O O O O O O O O O O

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
0
VIOLATION ACTION
VIOLATION TYPE
FREQUENCY
PARAMETER
LOCATION
D D D D D D
as
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c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
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a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(o (o (o (o (o (o (o (o (o (o (o (o (o (o (o (o
o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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o ▪ o ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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CT a a a a a a a a a a a a a a a
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
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m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s To 4 s
0 • 0 0 • 0 0 • o 0 • o 0 0 • 0 0 • 0 0 o 0
t s t
o o - o o - o o - o o - o - o o o o o o o
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g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m EL
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0
0
O
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N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
C F
O D
0
o_ O
zF
E 00
Ct
o I- a
CC
o 0
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cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
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a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
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O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
C C C C C C C C C C C C C C C C
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(o io io io io io io io io io io io io io io io
> • > > > > > > > > > > > > > > • >
O ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
C C C C C C C C C C C C C C C C
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0 • 0 0 0 0 • 0 0 • 0 0 0 • 0 0 • 0 0 0 0
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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N N N N N N N N N N N N N N N N
CO CO CO CO
O • O O O O O O O O O O O O O O O

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
C F
O D
T6 0
o_ O
zF
E 00
o I—0_
E 0
-0 -0 -0 -0 0 0 0 0 0 0 0 0 0 0 0 0
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cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE c• E cE
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O 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(o (o (o (o (o (o (o (o (o (o (o (o (o (o (o (o
> • > > > > > > > > > > > > > > • >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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N N N N N N N N N N N N N N N N
ao ao ao ao M M M M M M M M M M 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w o w o w 0 (U 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
as as as as as as as as as as as as as as as as
o o O O O O O O O O O O O O O 0
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O ▪ o ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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CT a a a a a a a a a a a a a a a
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UU)) a) a) a) a) a)) N N a) a) a) a) a) a) a) a)
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✓ V \ \ 00 W - 0- 0 00 l() LC) N N
N N N N O O N N O O
0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL U LL U LL U LL C.)LL C.)LL U LL U LL U LL U LL U
To • To 4 To • To 4 To • To 4 To • To 4 To • To • To 4 To • To 4 To • To 4 To
o • o o • o o • o o • o o o • o o • o o • o o
i C• .i s i C• .i s i C• .i s i C• .i s i C• .i C.i s i s i s i C• .i s i s
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m EL
O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O o O O O O O O O O O O O O O 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Downstream
Downstream
Downstream
Downstream
Downstream
Downstream
Downstream
Downstream
O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O
N N N N N N N N N N N N N N N N
O 0 0 0 0 0 - N N

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
• 10 10 10 • 10 • 10 10
as
> > > > > > > > > > > > > > > >
C c C C c c c C c C c C C c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
C c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> > > > > > > > > > > > > > > >
O ▪ o ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
CT a a a a a a a a a a a a a a a
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
O O O O O O O O O O O O O O O O
o o O O O O O O O O O O O O O O
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
a>) a• a)) a• a)) aa)) aa)) aa)) a) a) a• a)) a• a)) aa)) a• a)) aa)) aa)) aa)) a)
> > > > > > > > > > > > > > > >
N- N- N- N- N- N- N- N- co co co co co co co co
O) O) CO CO M M O O (0 CO M M O O I- N-
O O — — N N co co O O N N N N
• 0 0 0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U
m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s • To 4 s
o • o o • o o • o o • o o o • o o • o o • o o
i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s
o o o o o o o o o o o o o o o o
o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m EL
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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Downstream
E
a)
a)
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E
a)
a)
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O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
o o O O O O O O O O O O O O O O
N- N- N- N- N- N- N- N- 00 CO CO CO CO CO CO 00
O O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
N N N N N N N N N N N N N N N N
- O - 0 - 0 - 0 - 0 - 0 - 0 - 0

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
O D
T6 0
o_ O
zF
E 00
o I- a
0 0
CC
10 10 10
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w o w o w o w o w o w o w o w o w o w o w o aD
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
as as as as as as as as as as as as as as as as
o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> > > > > > > > > > > > > > > >
o ▪ o ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
CT a a a a a a a a a a a a a a a
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
O O O O O O O O O O O O O O O O
o o O O O O O O O O O O O O O O
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
a) a) a) a) a) a)) N N a) a) a) a) a) a) a) a)
> > > > > > > > > > > > > > > >
co co co co co co co co co co co co co co co co
M M O O I- isz V V M M O O N- V V
O O 7 7 7 7 N N O O — — — — N N
N N N N N N N N M M co co co co CO- CO-
c, O O O O O O O O O O O O O O O
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL U LL U LL U LL C.)LL C.)LL U LL U LL U LL U LL U
m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s • To 4 s
0 • 0 0 • 0 0 • o 0 • o 0 0 • 0 0 • 0 0 • o 0
i C• .i s i C• .i s i C• .i s i C• .i s i C• .i C.i s i s i s i C• .i s i s
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m EL
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Downstream
Downstream
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Downstream
Downstream
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Downstream
Downstream
O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
o o O O O O O O O O O O O O O O
CO CO CO CO CO CO CO CO 00 CO CO CO CO CO CO CO
O - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0
N N N N N N N N N N N N N N N N
N N N N N N N N CO CO CO CO CO CO CO CO
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

MONITORING REPORT(MR) VIOLATIONS for:
O
0
O
(
0
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
O D
T6 0
o_ O
zF
E 00
o I- a
0 0
CC
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w o w o w o w o w o w o w o w o w o w o w o aD
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> > > > > > > > > > > > > > > >
O ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
CT a a a a a a a a a a a a a a a
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
O O O O O O O O O O O O O O O O
o o O O O O O O O O O O O O O O
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
a)) a)) a)) a)) a)) a)) >N >N a) a) a) a) a) a) a)
N
> > > > > > > > > > > > > > > >
CO CO CO CO CO CO co co co co co co co co co co
V V \ \ 0) W In In N 'eV -
CO CO 0 0 - - N N N N 0 0
M M V V V V V V V V lf) lf) lf) L() L() L()
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U U U U U U U U U U U U U U U
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U LL U
m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s • To 4 s
0 • 0 0 • 0 0 • 0 0 • 0 0 0 • 0 0 • 0 0 • 0 0
a) () - () () - () () - () () - () w () - () () - () () - ()
i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m E m
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Downstream
E E
as as
a) a)
N
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o_ o_
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E E
as as
a) a)
0) N
o_ o_
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E
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a)
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O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
o o O O O O O O O O O O O O O O
CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO
O - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
N N N N N N N N N N N N N N N N
CO CO V V V V V V V V lf) LC) LC) lf) lf) lf)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0
(B
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
C F
O D
0
o_ O
zF
E 00
o I- a
CC
o 0
• as
> > > > > > > > > > > > > > > >
C C C C C C C C C C C C C C C C_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w o w o w o w o w o w o w o w o w o w o w o aU
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
C C C C C C C C C C C C C C C C
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
(o (o (o (o (o (o (o (o (o (o (o (o (o (o (o (o
> • > > • > > > > > > > > > • > > > • >
O ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
C C C C C C C C C C C C C C C C
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
CT a a a a a a a a a a a a a a a
1
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
O O O O O O O O O O O O O O O O
o o O O O O O O O O O O O O O O
Y Y Y Y Y Y Y Y Y Y Y Y Y Y
a) a) a) N N N N N N N N N N a)
a) N N N N N N N N N N N N a)
X X X X X X X X X X X X X X
co co co co co co co co co co co co co co
CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO
(0 CO N N
N N O O O O - - N N M M O O
O O O O O O O O O O O O O O O O
U U U U U U U U U U U U U U U U
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL C.)LL C.)LL C.)LL C.)LL C.)LL U LL U LL U LL U LL U
2 is, 2is, 2( 2 is, 2 in t in 2( 2 is, 2in 2 is, 2 is, 2 in 2Li, 2Li, 2 is, 2 in
m • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s To 4 s
0 • 0 0 • 0 0 • 0 0 • 0 0 0 • 0 0 • 0 0 0 0
a) () - () () - () () - () () - () w () - () () - () () - ()
i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o - o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m EL
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U U U U U U U U U U U U U U U
Downstream
E
a)
a)
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E
a)
a)
w
o_
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E
a)
a)
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o o O O O O O O O O O O O O O O
CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO
O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
N N N N N N N N N N N N N N N- C) N
O O O • O O O O O O O O O • O O O O

O
(B
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
O
0
O
(
0
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
LL
O ct
H • Q
W
2
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
O D
T6 0
o_ O
zF
E 00
o I- a
• CC
o 0
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o w o w o w 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
as as as as as as as as as as as as as as as as
o o O O O O O O O O O O O O O 0
> > > > > > > > > > > > > > > >
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
CT a a a a a a a a a a a a a a a
E E - E - E - E - E - E - E - E - E - E - E - E - E - E - E
O O O O O O O O O O O O O O O O
o o O O O O O O O O O O O O O O
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y
a) a) a) N N N N N N N N N N N N a)
a) N N N N N N N N N N N N N N a)
X X X X X X X X X X X X X X X X
co co co co co co co co co co co co co co co co
co co co co co co co co co co co co co co co co
N N N N 0 0 N N 0 0 0 0
CO COa a rn rn rn rn
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
u_ LL LL LL LL LL LL LL LL LL LL LL LL LL LL LL
LL U LL U LL U LL U LL U LL U LL C.)LL C.)LL C.)LL C.)LL C.)LL U LL U LL U LL U LL U
cs • m 4 s • m 4 s • To 4 s • m 4 s • m • m 4 s • m 4 s To 4 s
0 • 0 0 • 0 0 • 0 0 • 0 0 0 • 0 0 • 0 0 0 0
i s i s i s i s i s i s i s i s i s i s i s i s i s i s i s i -c-
2 o o o o o o o o o o o o o oo
- o - o - o - o - o - o - o - o - o - o - o - o - o - o - o
g m E m E m E m E m E m E m E m E m E m E m E m E m E m E m E m
O o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O o O O O O O O O O O O O O O 0
U U 0 0 0 0 0 0 0 0 0 0 0 0 0 0
E m E m m E m E m E m E m E m E
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O_ ▪ 3 O_ ▪ 3 3 O_ ▪ 3 O_ ▪ 3 O_ ▪ 3 O_ ▪ 3 O_ ▪ 3 O_
D 0 D O 0 D 0 D 0 D 0 D 0 D 0 D
D
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D
D
D
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D
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O • - O - O - O - O - O - O - O - O - O - O - O - O - O - O - O
o o O O O O O O O O O O O O O O
a0 CO CO CO CO CO 00 CO 00 CO CO CO CO CO CO CO
O - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0
N N N N N N N N N N N N N N N N
CO CO CO CO CO CO CO CO 0) 0) 0) 0)
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
O D
T6 0
o_ O
zF
E 00
CC
o I- a
CC
o 0
D D D 0 0 0 0
as
> > > > > > > > > > > > > > > >
c c c c c c c c c c c c c c c c_
cE cE cE cE c€ cE c€ cE cE cE cE c€ cE cE cE cE
o w o w o a`) o w o w o w o w o w o w o w o w o w o w o w o w o aD
a d t d t d t d t d t d t d t d t d t d t d t d t d t d t d t d
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
z z z z z z z z z z z z z z z z
c c c c c c c c c c c c c c c c
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> > > > > > > > > > > > > > > >
o ▪ o ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0 ▪ 0
c c c c c c c c c c c c c c c c
a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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O 0 0 0 0 0

MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
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▪ D D D D D
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MONITORING REPORT(MR) VIOLATIONS for:
O
0
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0
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
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J
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c F
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MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
O D
T6 0
o_ O
zF
E 00
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MONITORING REPORT(MR) VIOLATIONS for:
O
0
O
(
0
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
0
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
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J
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LL
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MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
LOCATION
J
J
Q
LL
c F
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O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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N
0
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MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
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VIOLATION ACTION
VIOLATION TYPE
H
2
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J
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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0 0 0 0 0 0 0 0 0 0 0 0 0 0

Page 21 of 27
0
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
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J
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0 0 0 0 0 0

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O
0
0
N
MONITORING REPORT(MR) VIOLATIONS for:
Permit: NC0025542 MRs Betweei 1 - 2016 and
Violation Action: %
Subbasin: %
Param NamE %
Facility Name: %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
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PARAMETER
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- 0 - 0 - 0 - 0 - 0 - 0 - 0 - 0

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0
0
0
0_
0
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
a
VIOLATION ACTION
VIOLATION TYPE
H
2
J
FREQUENCY
PARAMETER
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J
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a) a) a) a) a) a) a) a) a) a) a) a) a) a) a) a)
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

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0
0
0
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N
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
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VIOLATION ACTION
VIOLATION TYPE
H
2
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J
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a) a) a) as as as a) as as as as as as as as a)
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Violation Action: %
Subbasin: %
Param NamE %
Facility Name: %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
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Page 26 o1 27
0
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MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
0
VIOLATION ACTION
VIOLATION TYPE
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PARAMETER
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Page 27 o1 27
MONITORING REPORT(MR) VIOLATIONS for:
Violation Action: %
Subbasin: %
Param Nam( %
Major Minor:
REGION: Mooresville
COUNTY: Catawba
FACILITY: City of Hickory - Catawba WWTP
NC0025542
F
5
W
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VIOLATION ACTION
VIOLATION TYPE
FREQUENCY
PARAMETER
LOCATION
Frequency Violation
1-
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N
O

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
January 19, 2021
Shawn Pennell, Public Utilities Director
City of Hickory
Post Office Box 398
Hickory, North Carolina 28603-0398
Subject: Compliance Evaluation Inspection
Hickory -Catawba WWTP
NPDES Permit No. NC0025542
Catawba County
Dear Mr. Pennell:
Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the subject
facility on January 14, 2021, by Mr. Wes Bell of this Office. Please inform the facility's Operator -in -Responsible
Charge (ORC) of our findings by forwarding a copy of the enclosed report.
Should you have any questions concerning this letter, please do not hesitate to contact Mr. Bell at (704) 235-
2192, or via email at [e-mail].
Enclosure:
Inspection Report
QE
NORTH CAROLINA
Department ,t En*o.,rapbl Qualllp
Sincerely,
T—DocuSigned by:
—A14CC681AF27425...
W. Corey Basinger, Regional Supervisor
Water Quality Regional Operations Section
Division of Water Resources, NCDEQ
North Carolina Department of Environmental Quality I Division of Water Resources
Mooresville Regional Office 1610 East Center Avenue, Suite 301 I Mooresville, North Carolina 28115
704.663.1699

United States Environmental Protection Agency
EPA Washington, D.C. 20460
Water Compliance Inspection Report
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code
1 IN I 2[ I
211I1111 111111111
NPDES yr/mo/day Inspection
3 I NC0025542 111 121 21/01/14 117
Type
181 I
II 111111111
Inspector Fac Type
191 s I 2011
II 1111111 I I II I
66
11 1
Inspection Work Days
67I2.0
Facility Self -Monitoring Evaluation Rating B1 QA Reserved
I 7° I4 I 71 IN I 72 I N I 73I I 174 I 751
11 1
I I I I I I 180
l
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES Dermit Number)
Catawba WWTP
End Of Sixth Ave Nw
Catawba NC 28609
Entry Time/Date
09:25AM 21/01/14
Permit Effective Date
16/11/01
Exit Time/Date
12:05PM 21/01/14
Permit Expiration Date
20/04/30
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
David Archambault/ORC/828-234-7419/
Todd Atwell Bumgarner//828-322-5075 /
Other Facility Data
Name, Address of Responsible Official/Title/Phone and Fax Number
Contacted
Warren Wood,PO Box 398 Hickory NC 286010398/City Manager/828-323-7412/
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Flow Measurement Operations & Maintenar Records/Reports
Self -Monitoring Progran Sludge Handling Dispo: Facility Site Review Effluent/Receiving Wate
Laboratory
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s)
Wes Bell
of Inspector(s) Agency/Office/Phone and Fax Numbers Date
,-DocuSigned by: DWR/MRO WQ/704-663-1699 Ext.2192/
?4l, B 1/19/2021
'-A61696D90CC3437...
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
W. Corey Basinger DWR/Division of Water Quality/704-235-2194/
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
1- DocuSigned by:
1/19/2021
�A14CC681AF27425...
Page# 1

NPDES yr/mo/day
31 NC0025542 111 121 21/01/14
I17
Inspection Type
18 [j
1
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Page# 2

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Permit
(If the present permit expires in 6 months or less). Has the permittee submitted a new
application?
Is the facility as described in the permit?
# Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: The Division received the facility's permit renewal application on 1/16/2020.
The City implements a Division -approved Industrial Pretreatment Program.
The last compliance evaluation inspection at this facility was performed by DWR staff on
12/12/2018.
Record Keeping
Are records kept and maintained as required by the permit?
Is all required information readily available, complete and current?
Are all records maintained for 3 years (lab. reg. required 5 years)?
Are analytical results consistent with data reported on DMRs?
Is the chain -of -custody complete?
Dates, times and location of sampling
Name of individual performing the sampling
Results of analysis and calibration
Dates of analysis
Name of person performing analyses
Transported COCs
Are DMRs complete: do they include all permit parameters?
Has the facility submitted its annual compliance report to users and DWQ?
(If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operatc
on each shift?
Is the ORC visitation log available and current?
Is the ORC certified at grade equal to or higher than the facility classification?
Is the backup operator certified at one grade less or greater than the facility classification'
Is a copy of the current NPDES permit available on site?
Facility has copy of previous year's Annual Report on file for review?
Yes No NA NE
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• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
•
•
•
•
•
•
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❑ ❑ • ❑
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❑ ❑ ❑ •
Page# 3

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Record Keeping Yes No NA NE
Comment: The records reviewed during the inspection were organized and well maintained. Discharge
Monitoring Reports (eDMRs) were reviewed for the period December 2019 through
November 2020. All monitoring frequencies were correct. Weekly average effluent
ammonia violations were reported in March and April 2020. Monthly average effluent
ammonia violations were reported in January, March and April 2000. These violations have
been previously addressed by the Division through the issuances of Notice of Violations
(NOVs) and/or civil penalty assessments.
Laboratory
Are field parameters performed by certified personnel or laboratory?
Are all other parameters(excluding field parameters) performed by a certified lab?
# Is the facility using a contract lab?
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
Celsius)?
Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees?
Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ • ❑
❑ ❑ • ❑
Comment: Influent and effluent analyses are performed under the City of Hickory's municipal laboratory
certification #203. Pace Analytical Services, Blue Ridge Labs and ETT Environmental have
also been contracted to provide analytical support.
Influent Sampling
# Is composite sampling flow proportional?
Is sample collected above side streams?
Is proper volume collected?
Is the tubing clean?
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
Celsius)?
Is sampling performed according to the permit?
Yes No NA NE
• ❑ ❑ ❑
❑ • ❑ ❑
• ❑ ❑ ❑
▪ ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: The subject permit requires influent BOD and TSS composite samples. Sampler aliquot
checks are performed (and documented) multiple times per month.
Filter backwash, plant drainage system and decant (sludge holding tanks) all discharge
upstream of the influent sampling location; however, the ORC and staff do not decant during
influent sampling events. The City is currently investigating a new influent sampling location
above all side streams.
Effluent Sampling
Is composite sampling flow proportional?
Is sample collected below all treatment units?
Is proper volume collected?
Yes No NA NE
▪ ❑ ❑ ❑
▪ ❑ ❑ ❑
• ❑ ❑ ❑
Page# 4

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Effluent Sampling
Is the tubing clean?
# Is proper temperature set for sample storage (kept at less than or equal to 6.0 degrees
Celsius)?
Is the facility sampling performed as required by the permit (frequency, sampling type
representative)?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: The subject permit requires composite and grab effluent samples. Sampler aliquot checks
are performed (and documented) multiple times per month.
Upstream / Downstream Sampling Yes No NA NE
Is the facility sampling performed as required by the permit (frequency, sampling type, an( • ❑ ❑ ❑
sampling location)?
Comment:
Operations & Maintenance
Is the plant generally clean with acceptable housekeeping?
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable
Solids, pH, DO, Sludge Judge, and other that are applicable?
Yes No NA NE
▪ ❑ ❑ ❑
▪ ❑ ❑ ❑
Comment: The wastewater treatment facility appeared to be properly operated and well maintained.
The facility staff incorporate a comprehensive process control program with all
measurements being properly documented and maintained on -site. In-depth operation and
maintenance records were also being maintained on -site. The facility is also equipped with
a SCADA System.
Although not required, the facility is visited by certified operators seven days per week.
Bar Screens
Type of bar screen
a.Manual
b.Mechanical
Are the bars adequately screening debris?
Is the screen free of excessive debris?
Is disposal of screening in compliance?
Is the unit in good condition?
Comment:
Grit Removal
Type of grit removal
a.Manual
Yes No NA NE
•
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▪ ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
Page# 5

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Grit Removal
b.Mechanical
Is the grit free of excessive organic matter?
Is the grit free of excessive odor?
# Is disposal of grit in compliance?
Comment: Screenings and grit are disposed at the County Landfill.
Oxidation Ditches
Are the aerators operational?
Are the aerators free of excessive solids build up?
# Is the foam the proper color for the treatment process?
Does the foam cover less than 25% of the basin's surface?
Is the DO level acceptable?
Are settleometer results acceptable (> 30 minutes)?
Is the DO level acceptable?(1.0 to 3.0 mg/I)
Are settelometer results acceptable?(400 to 800 ml/I in 30 minutes)
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: One of two oxidation ditch trains was in service due to low influent flows. Each oxidation
ditch train is equipped with an anaerobic and anoxic basin. Soda ash is added to maintain
alkalinity/pH levels and a microbial supplement is added to provide an additional carbon
source.
Secondary Clarifier Yes No NA NE
Is the clarifier free of black and odorous wastewater?
Is the site free of excessive buildup of solids in center well of circular clarifier?
Are weirs level?
Is the site free of weir blockage?
Is the site free of evidence of short-circuiting?
Is scum removal adequate?
Is the site free of excessive floating sludge?
Is the drive unit operational?
Is the return rate acceptable (low turbulence)?
Is the overflow clear of excessive solids/pin floc?
Is the sludge blanket level acceptable? (Approximately'/ of the sidewall depth)
• ❑ ❑ ❑
• ❑ ❑ ❑
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• ❑ ❑ ❑
Comment: Both secondary clarifiers were operational; however, only one clarifier was in service.
Page# 6

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Pumps-RAS-WAS
Are pumps in place?
Are pumps operational?
Are there adequate spare parts and supplies on site?
Comment:
Filtration (High Rate Tertiary)
Type of operation:
Is the filter media present?
Is the filter surface free of clogging?
Is the filter free of growth?
Is the air scour operational?
Is the scouring acceptable?
Is the clear well free of excessive solids and filter media?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Yes No NA NE
Down flow
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
Comment: All four tertiary filters were operational; however, only one filter was in service.
Disinfection -Liquid
Is there adequate reserve supply of disinfectant?
(Sodium Hypochlorite) Is pump feed system operational?
Is bulk storage tank containment area adequate? (free of leaks/open drains)
Is the level of chlorine residual acceptable?
Is the contact chamber free of growth, or sludge buildup?
Is there chlorine residual prior to de -chlorination?
Comment:
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
De -chlorination Yes No NA NE
Type of system ? Liquid
Is the feed ratio proportional to chlorine amount (1 to 1)? ❑ ❑ ❑
Is storage appropriate for cylinders? ❑ ❑ • ❑
# Is de -chlorination substance stored away from chlorine containers? ❑ ❑ ❑
Comment:
Are the tablets the proper size and type? ❑ ❑ • ❑
Are tablet de -chlorinators operational? ❑ ❑ • ❑
Number of tubes in use?
Page# 7

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
De -chlorination Yes No NA NE
Comment:
Flow Measurement - Effluent
# Is flow meter used for reporting?
Is flow meter calibrated annually?
Is the flow meter operational?
(If units are separated) Does the chart recorder match the flow meter?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
Comment: The flow meter is calibrated twice per year and was last calibrated on 1/16/2020 by
Diversified Integration, Inc.
Effluent Pipe
Is right of way to the outfall properly maintained?
Are the receiving water free of foam other than trace amounts and other debris?
If effluent (diffuser pipes are required) are they operating properly?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
❑ ❑ • ❑
Comment: The effluent appeared clear with no floatable solids or foam. The receiving stream did not
appear to be negatively impacted.
Aerobic Digester
Is the capacity adequate?
Is the mixing adequate?
Is the site free of excessive foaming in the tank?
# Is the odor acceptable?
# Is tankage available for properly waste sludge?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Comment: The facility is equipped with two aerated sludge holding tanks. Sludge is transported by City
personnel to the Regional Compost Facility for continued processing/treatment.
Standby Power
Is automatically activated standby power available?
Is the generator tested by interrupting primary power source?
Is the generator tested under load?
Was generator tested & operational during the inspection?
Do the generator(s) have adequate capacity to operate the entire wastewater site?
Is there an emergency agreement with a fuel vendor for extended run on back-up power?
Is the generator fuel level monitored?
Yes No NA NE
• ❑ ❑ ❑
• ❑ ❑ ❑
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▪ ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
• ❑ ❑ ❑
Page# 8

Permit: NC0025542
Inspection Date: 01/14/2021
Owner - Facility: Catawba WWTP
Inspection Type: Compliance Evaluation
Standby Power Yes No NA NE
Comment: The backup generator is tested twice per month with one of these tests being under a load.
The generator is serviced by City personnel and Cummings has also been contracted to
perform repairs, etc.
Page# 9

Attachment A —Request for Missing Information
Table 2. EPA Application Form 2A Missing Information
40 CFR
122.21(j)(1)
1.1 >
Email address of facility contact
Keith Rhyne, [e-mail]
1,2
Applicant email address
Shawn Pennell, [e-mail]
1 3 :`
Email address of the organization transporting the discharge for treatment prior to discharge
City of Hickory, Keith Rhyne, [e-mail]
14 ':
Email address of the organization receiving the discharge for treatment prior to discharge
City of Hickory Regional Compost Facility, Paul Spencer, [e-mail]
1 5 ;
Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(n)? (Check all that apply. Consult
with your NPDES permitting authority to determine what information needs to be submitted and when.)
Discharges into marine waters (CWA Section Water quality related effluent limitation (CWA
301(h)) Section 302(b)(2))
El Not applicable
1.6
40 CFR
Email address of contractor responsible for operational or maintenance
Andrew Foy, afoy , hicko nc.gov
122.216)(6)
aspects of the treatment works
1 7
Indicate the number of SIUs and NSCIUs that discharge to the POTW.
Number of SIUs
Number of ClUs
0
0
40 CFR
1,8 ':
122.22(a) and (d)
were prepared under my direction or supervision in
properly gather and evaluate the information submitted.
system, or those persons directly responsible for gathering the
and belief, true, accurate, and complete. I am aware that
the possibility of fine and imprisonment for knowing
Certification Statement
1 certify under penalty of law that this document and all attachments
accordance with a system designed to assure that qualified personnel
Based on my inquiry of the person or persons who manage the
information, the information submitted is, to the best of my knowledge
there are significant penalties for submitting false information, including
violations.
Name (print or type first and last name)
Warren Wood
Official title
City Manager — City of Hickory
Signat re
Date signed

2/24/2021 Mail - Yitbarek, Diana - Outlook
[External] RE: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
Caleb Bynum <[e-mail]>
Mon 2/22/2021 12:58
To: Yitbarek, Diana <[e-mail]>
2 attachments (407 KB)
Catawba WWTP - Request for Missing Information.pdf; Catawba EPF Justification and Analyses.pdf;
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment
to Report Spam.
Good afternoon, Diana.
I have been able to gather the information that you requested to help complete the Catawba WWTP permit
renewal. I will address each of your requests using the numbering you established below.
1. See attached.
2. Outfall Coordinates: 35.715580 N, 81.073474 W
Upstream (Lyle Creek @NC 10) : 35.715112 N, 81.077798 W
Downstream (@ Marina off Canvasback Ln) : 35.710036 N, 81.060843 W
3. None
4. The City of Hickory would like to request reduced monitoring for BOD, TSS, NH3/N, and Fecal Coliform. I
have attached the EPF Justification and Analysis document that was included with the permit renewal for
reference.
5. The City of Hickory does not conduct an IWS for the Catawba WWTF as there are no industries in the
service area. However, as a continuous IWS effort, the City would be notified if any new industry moved
into the Catawba WWTF service area. At that point a completed short -form would be required from the
user along with any other documentation deemed necessary.
Let me know if you have any questions.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
HICKORY
42 Middle
Life. Well C t&d
From: Yitbarek, Diana [mailto:[e-mail]]
Sent: Friday, February 12, 2021 4:17 PM
To: Caleb Bynum <[e-mail]>
Subject: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: This email originated from outside of the organization
https://outlook.office365.com/mail/inbox/id/AAQkADNmOTIxZjdhLTEyMWYtNDEzMS1 iOGNiLTkxNmZhYWJmZThIMAAQACfx0M44QwdNoMmNE%2... 1/2

2/24/2021 Mail - Yitbarek, Diana - Outlook
Good afternoon, Caleb
I recently started reviewing the October 30, 2019, NPDES permit application for renewal for the
Catawba WWTP. Please provide additional or revised information to address the following
comments:
1. Please complete this short form to meet the new application requirements for the updated
application form 2A.
2. Please revise the outfall coordinate location (32°42155"N 81°04'25" W) and provide
coordinates for the upstream and downstream location points (approximate coordinates from
google maps would suffice).
3. If there are additional pollutants with certified methods to be reported, please submit this
Chemical Addendum. If applicable, list the selected certified analytical method used.
4. I noted the cover letter included a request for this plant to be designated as an exceptionally
performing facility and requested reduced monitoring. Please specify the parameters for which
the City would like to request frequency monitoring reduction.
5. Please submit the last industrial waste survey (IWS) performed for the Catawba WWTP service
area
We'll appreciate it if you provide this information within the next three weeks; if you need more
time, please let me know.
Thanks for your continued cooperation with the NPDES program and your work protecting public
health and the environment.
Please let me know if you have any questions.
Best,
-Diana
Diana Yitbarek
Engineer
T: [phone]
[e-mail]
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources
Mailing: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street, Rm. 925T, Raleigh, NC 27604-1170
E
..•,.,:••
OnpvinwM aI fm+r r•Irr nial 0ciai��r
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.
https://outlook.office365.com/mail/inbox/id/AAQkADNmOTIxZjdhLTEyMWYtNDEzMS1 iOGNiLTkxNmZhYWJmZThIMAAQACfx0M44QwdNoMmNE%2... 2/2

Re: [External] RE: (methyl bromide) NC0025542, Catawba WWTP, City of Hickory,
Catawba County, MRO
Yitbarek, Diana <[e-mail]>
3/29/202
To: Bynum, Caleb M <[e-mail]>
Bcc: Montebello, Michael J <[e-mail]>
Good afternoon, Caleb - Thanks for your message.
Analytical methods shall be in accordance with 40 CFR Part 136. If no approved methods can
achieve results below the PQL/below the permit discharge requirement, the method with the lowest
detection level must be used. According to the NC DEQ Methods and PQL list (revised on
1/22/2021), the current method for Methyl Bromide/Bromomethane with the lowest detection level
is EPA 624/SW-846 8260 B (PQL 2 ug/I).
I can't specify the method in the permit, but I will add the above language to the fact sheet.
I will move forward with the compliance schedule. The draft permit will be public noticed on
4/6/2021.
Please let me know if you have any questions.
-Diana
Diana Yitbarek
Engineer
T: [phone]
dianayitbarekE ncdenr.gov
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources
Mailing. 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street, Rm. 925T, Raleigh, NC 27604-1170
Qs,)
7�t ,rrn
o.�naune�� aumiir
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.
From: Caleb Bynum <[e-mail]>
Sent: Monday, March 29, 2021 08:37
To: Yitbarek, Diana <[e-mail]>
Subject: [External] RE: (methyl bromide) NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment
to Report Spam.
Good morning, Diana.

I appreciate you taking the time to walk us through that RPA process. Is there language in the permit that makes it
clear what test result will be considered in compliance? I believe you said that a result of below the PQL will be
considered in compliance, but I just want to make sure that its clear in the permit.
I just wanted to make sure there was no other method of writing in an end to the compliance schedule in the
permit. We would like to move forward with the compliance schedule that you laid out in your first email.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
HICKORY
U£$. Welt CraF[d
From: Yitbarek, Diana [mailto:[e-mail]]
Sent: Friday, March 26, 2021 3:52 PM
To: Caleb Bynum <[e-mail]>
Subject: (methyl bromide) NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: This email originated from outside of the organization
Good afternoon, Caleb
Thanks for your message.
1. I confirm that the proposed Methyl Bromide limit is 0.26 pg/I for the 1.5 MGD flow tier based on
the reasonable potential analysis (RPA). In some cases, the RPA calculates the limit below the
PQL. For this RPA, we used the methyl bromide data provided in the last effluent pollutant
scans and the water quality standard for aquatic life, 0.04 ug/L. The RPA is conducted in
accordance with 40 CFR 122.44 (d) (i). The NC RPA procedure utilizes the following: 1) 95%
Confidence Level/95% Probability; 2) assumption of zero background; 3) use of 1/2 detection
limit for "less than" values; and 4) stream flows used for dilution consideration based on 15A
NCAC 26.0206. I am attaching the RPA output table.
2. The City could "cancel" the compliance schedule by submitting a major permit modification.
Further information on permit modification processes is here.
a. You are correct. Methyl Bromide will be required as a grab sample.
Please let me know if you have any questions.
Have a good weekend!
-Diana
Diana Yitbarek
Engineer
T: [phone]
[e-mail]
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources

Mailing: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street, Rm. 925T, Raleigh, NC 27604-1170
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.
From: Caleb Bynum <[e-mail]>
Sent: Wednesday, March 24, 2021 16:17
To: Yitbarek, Diana <diana.yitbarekjncdenr.gov>
Subject: [External] RE: (methyl bromide) NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
rCAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Diana,
We have been discussing this one around the office pretty extensively, and we have a few questions.
1. Will you confirm that the proposed Methyl Bromide limit is 0.26 pg/I as provided below? What is the
reason for having a limit that far below the PQL for the contaminant?
2. Is there a means for us to "cancel" the compliance schedule if after a year of testing we
determine that we do not have a problem with Methyl Bromide? With it being a grab sample, it is
more subject to contamination from surrounding elements than a composite sample. We feel that the
elevated samples could have been a result of contamination rather than from an influent source.
However, without more information it is hard to know.
We do not want to decline the compliance schedule and then have a problem meeting the limit, but
we also don't want to go through the additional effort for three years if we don't actually have a
problem.
I appreciate your help on this.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
cid:image002.jpg@010E6B31.81355A50
From: Yitbarek, Diana[mailto:[e-mail]]
Sent: Monday, March 22, 2021 12:40 PM
To: Caleb Bynum <[e-mail]>
Subject: (methyl bromide) NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: This email originated from outside of the organization
Good afternoon, Caleb

Thanks for the information provided. We are close to completing the draft permit and need your
input on the following:
Background Information:
Based on the reasonable potential analysis (RPA), we plan on including a Monthly Average limit for
methyl bromide (0.26 pg/I). Here is the methyl bromide data provided in the last effluent pollutant
scans:
Date Data
2/2/2016 4.4
8/8/2017 < 2
11 /6/2018 11.7
5/9/2019 < 2
2/4/2020 < 2
To provide an opportunity for the City to develop a plan to assess sources of methyl bromide in
order to come in compliance with the limits, we could add to the permit a 3-year schedule of
compliance to the permit, as follows:
1. One year after the effective date, the Permittee shall submit to the Division of Water Resources a
Corrective Action Plan summarizing the actions or strategy to be taken to achieve compliance with
the methyl bromide limits at outfall 001. Specific dates for completion or implementation of each
action shall be included.
2. Two years after the effective date, the Permittee shall identify sources of the pollutant and
evaluate source reduction alternatives. The Permittee shall submit a report to the Division
summarizing actions taken in accordance with the Corrective Action Plan.
3. Three years after the effective date, the Permittee shall achieve compliance with methyl bromide
limits specified in Section A.(1).
Upon approval of the Corrective Action Plan by the Division, the report and actions become an
enforceable part of this permit. Any modifications to the schedule shall be requested to the Division
at least ninety (90) days before the deadline. Modifications to the schedule in excess of four months
will be subject to public notice.
Here is where I need your input:
Please let us know whether the City needs us to include the compliance schedule.
Thanks,
-Diana
Diana Yitbarek
Engineer
T: [phone]
[e-mail]
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources
Mailing: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street, Rm. 925T, Raleigh, NC 27604-1170
i d: i mage001.j pg@01 D72006. F3 D624B0
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.

From: Caleb Bynum <[e-mail]>
Sent: Thursday, March 4, 2021 14:03
To: Yitbarek, Diana <diana.yitbarekjncdenr.gov>
Subject: [External] FW: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Good afternoon, Diana.
Please see below for the response from our pretreatment coordinator concerning the required 2nd species test
results, and the corrected numbers for the eDMR entries.
Let me know if you need any more information from us.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
cid:image002.jpg@010E6B31.81355A50
From: David Cox
Sent: Thursday, March 4, 2021 7:57 AM
To: Caleb Bynum <cbynum hickorync.gov>
Subject: RE: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
Good morning Caleb,
1. The 2nd species toxicity results were attached to the renewal and are on page 30. All required Fathead
Minnow sampling was conducted and I have attached the spreadsheet with the monitoring results for
your reference.
2. Hardness — 5/8/18 — 46,100 ug/I
Zn — 10/5/16 — <50 ug/I
Zn — 10/19/16 — <50 ug/I
Zn — 5/8/18 — 39.9 ug/I
Zn — 11/5/19 — 27.8 ug/I
These were all unit errors. The eDMR system doesn't automatically input Hardness and Zn into the
template, so we have to manually add those parameters (along with units and sample type) each month.
Let me know if you need anything else. Thanks,
David R. Cox
Pretreatment Coordinator
dcox©hickorync.gov
City of Hickory

[phone]
www.hickorync.gov
,,city logo (email)
From: Caleb Bynum
Sent: Wednesday, March 3, 2021 4:08 PM
To: David Cox <[e-mail]>
Subject: FW: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
David,
Would you mind looking at the email below from Diana, and get the information together that she is asking for? I
can send you a copy of what I sent with the renewal if you need it for reference.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
cid:image002.jpg@010E6B31.81355A50
From: Yitbarek, Diana [mailto:[e-mail]]
Sent: Wednesday, March 3, 2021 3:55 PM
To: Caleb Bynum <cbynumPhickorync.gov>
Subject: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: This email originated from outside of the organization
Good afternoon, Caleb - Thank you for the information provided. I will appreciate your
support with the following:
1. The permit for this facility requires four toxicity tests for a test organism other than
Ceriodaphnia. Our database shows records for three 2nd species tests (11/2018,
2/2019, and 8/2019). Please double-check your records and submit the 2nd species
test lab results.
2. Please clarify/correct the eDMR entries for the following values: hardness on
5/18/2018 (46100 mg/I.); zinc on 10/5/16 and 10/19/16 (<50 mg/I); zinc on 5/8/18
(39.9 mg/I) and 11/5/19 (27.8 mg/I).
Thanks!
-Diana
Diana Yitbarek
Engineer
T: [phone] M: [phone]
diana yitbarekAncdenr.gov
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources
Mailing. 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street Rm. 925T Raleigh NC 27604-1170

id: image004.png401D720C6.F3D624B0
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.
From: Caleb Bynum <[e-mail]>
Sent: Monday, February 22, 2021 12:58
To: Yitbarek, Diana <[e-mail]>
Subject: [External] RE: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
rCAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to Report Spam.
Good afternoon, Diana.
I have been able to gather the information that you requested to help complete the Catawba WWTP permit
renewal. I will address each of your requests using the numbering you established below.
1. See attached.
2. Outfall Coordinates: 35.715580 N, 81.073474 W
Upstream (Lyle Creek @NC 10) : 35.715112 N, 81.077798 W
Downstream (@ Marina off Canvasback Ln) : 35.710036 N, 81.060843 W
3. None
4. The City of Hickory would like to request reduced monitoring for BOD, TSS, NH3/N, and Fecal Coliform. I
have attached the EPF Justification and Analysis document that was included with the permit renewal for
reference.
5. The City of Hickory does not conduct an IWS for the Catawba WWTF as there are no industries in the
service area. However, as a continuous IWS effort, the City would be notified if any new industry moved
into the Catawba WWTF service area. At that point a completed short -form would be required from the
user along with any other documentation deemed necessary.
Let me know if you have any questions.
Thanks,
Caleb Bynum, El
Utilities Engineer
City of Hickory Public Utilities
[e-mail]
[phone]
cid:image002.jpg@010E6B31.81355A50
From: Yitbarek, Diana [mailto:[e-mail]]
Sent: Friday, February 12, 2021 4:17 PM
To: Caleb Bynum <[e-mail]>
Subject: NC0025542, Catawba WWTP, City of Hickory, Catawba County, MRO
CAUTION: This email originated from outside of the organization
Good afternoon, Caleb
I recently started reviewing the October 30, 2019, NPDES permit application for renewal for the
Catawba WWTP. Please provide additional or revised information to address the following

comments:
1. Please complete this short form to meet the new application requirements for the updated
application form 2A.
2. Please revise the outfall coordinate location (32°42155"N 81°04'25" W) and provide
coordinates for the upstream and downstream location points (approximate coordinates from
google maps would suffice).
3. If there are additional pollutants with certified methods to be reported, please submit this
Chemical Addendum. If applicable, list the selected certified analytical method used.
4. I noted the cover letter included a request for this plant to be designated as an exceptionally
performing facility and requested reduced monitoring. Please specify the parameters for which
the City would like to request frequency monitoring reduction.
5. Please submit the last industrial waste survey (IWS) performed for the Catawba WWTP service
area
We'll appreciate it if you provide this information within the next three weeks; if you need more
time, please let me know.
Thanks for your continued cooperation with the NPDES program and your work protecting public
health and the environment.
Please let me know if you have any questions.
Best,
-Diana
Diana Yitbarek
Engineer
T: [phone]
[e-mail]
NPDES Municipal Permitting Unit
NC Department of Environmental Quality/ Division of Water Resources
Mailing: 1617 Mail Service Center, Raleigh, NC 27699-1617
Physical: 512 N. Salisbury Street, Rm. 925T, Raleigh, NC 27604-1170
cid:image004.png@O1D720C6.F3D624B0
*Please check with the appropriate staff before visiting our offices, as we may be able to handle your requests by phone or email. We can
also be available via Microsoft Teams if requested. Thanks for your patience and stay safe.
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.

Permit No. NC0025542
NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently
approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft
permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as
approved.
Table 1. NC Dissolved Metals Water Quality Standards/Aquatic Life Protection
Parameter
Acute FW, µg/1
(Dissolved)
Chronic FW, µg/1
(Dissolved)
Acute SW, µg/1
(Dissolved)
Chronic SW, µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life
standards for Mercury and selenium are still expressed as Total Recoverable Metals due to
bioaccumulative concerns (as are all human health standards for all metals). It is still necessary
to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC
2B.0200 (e.g., arsenic at 10 µg/1 for human health protection; cyanide at 5 µg/L and fluoride at
1.8 mg/L for aquatic life protection).
Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/I
Cadmium, Acute
WER*{1.1366724ln hardness](0.041838)} - e^{0.9151 [ln hardness]-3.1485}
Cadmium, Acute Trout waters
WER*{1.1366724ln hardness](0.041838)} - e^{0.9151[ln hardness]-3.6236}
Cadmium, Chronic
WER*{1.1016724ln hardness](0.041838)} - e^{0.7998[ln hardness]-4.4451}
Chromium III, Acute
WER*0.316 - e^{0.8190[ln hardness]+3.7256}
Chromium III, Chronic
WER*0.860 • e^{0.8190[ln hardness]+0.6848}
Copper, Acute
WER*0.960 • e^{0.9422[ln hardness]-1.700}
Copper, Chronic
WER*0.960 • e^{0.8545[ln hardness]-1.702}
Lead, Acute
WER*{1.462034ln hardness](0.145712)} • e^{1.273[ln hardness]-1.460}
Lead, Chronic
WER*{1.462034ln hardness](0.145712)} • e^{1.273[ln hardness]-4.705}
Nickel, Acute
WER*0.998 • e^{0.8460[ln hardness]+2.255}
Nickel, Chronic
WER*0.997 • e^{0.8460[ln hardness]+0.0584}
Page 1 of 4

Permit No. NC0025542
Silver, Acute
WER*0.85 • e^{1.72[ln hardness]-6.59}
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 • e^{0.8473[ln hardness]+0.884}
Zinc, Chronic
WER*0.986 • e^{0.8473[ln hardness]+0.884}
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of
the dissolved and hardness -dependent standards requires additional consideration in order to establish the
numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness
and so must be calculated case -by -case for each discharge.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The
discharge -specific standards must be converted to the equivalent total values for use in the RPA
calculations. We will generally rely on default translator values developed for each metal (more on that
below), but it is also possible to consider case -specific translators developed in accordance with
established methodology.
RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,
based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable
standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If
monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below
detection level), then the Division may remove the monitoring requirement in the reissued permit.
1. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q10 (the spreadsheet automatically calculates
the 1Q10 using the formula 1Q10 = 0.843 (s7Q10, cfs) 0.993
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of concern and for
each individual discharge, the Permit Writer must first determine what effluent and instream
(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any
hardness data and contacts the Permittee to see if any additional data is available for instream
hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the
hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively.
If the use of a default hardness value results in a hardness -dependent metal showing reasonable
potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and
upstream hardness samples over a period of one week. The RPA is rerun using the new data.
Page 2of4

Permit No. NC0025542
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic)
= (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) + (s7Q10, cfs *Avg. Upstream Hardness, mg/L)
(Permitted Flow, cfs + s7Q10, cfs)
The Combined Hardness for acute is the same but the calculation uses the 1Q10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total recoverable
metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any
have been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream
ambient conditions. This factor is calculated using the linear partition coefficients
found in The Metals Translator: Guidance for Calculating a Total Recoverable
Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the
equation:
Cdiss = 1
Ctotal 1 + { [KPoI �SS(1+a)l r 1 0-6l }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used,
and
Kpo and a = constants that express the equilibrium relationship between dissolved
and adsorbed forms of metals. A list of constants used for each hardness -dependent
metal can also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard for each metal of concern is divided by the default partition coefficient (or
site -specific translator) to obtain a Total Recoverable Metal at ambient conditions.
In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the
dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to
obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is
dissolved to the same extent as it was during EPA's criteria development for metals. For more
information on conversion factors see the June, 1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7Q10 + Qw) (Cwqs) — (s7Q10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q10)
s7Q10 = summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Flows other than s7Q10 may be incorporated as applicable:
1Q10 = used in the equation to protect aquatic life from acute toxicity
Page 3 of 4

Permit No. NC0025542
QA = used in the equation to protect human health through the consumption of water,
fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern.
Data entered must have been taken within four and one-half years prior to the date of the permit
application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper
concentration of each pollutant. The Predicted Max concentrations are compared to the Total
allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds
the acute or chronic Total allowable concentrations, the discharge is considered to show
reasonable potential to violate the water quality standard, and a permit limit (Total allowable
concentration) is included in the permit in accordance with the U.S. EPA Technical Support
Document for Water Quality -Based Toxics Control published in 1991.
7. When appropriate, permit writers develop facility specific compliance schedules in accordance
with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on
40 CFR 122.47 Compliance Schedule Requirements.
8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and
hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data
results may be used as a conservative surrogate in cases where there are no analytical results
based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for
total chromium will be compared against water quality standards for chromium III and
chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are
inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the
accuracy of the permit limits and to build a more robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included:
Parameter
Value
Comments (Data Source)
Average Effluent Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
47.49
Data provided in DMRs
Average Upstream Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
30.68
Data provided in DMRs
7Q10 summer (cfs)
13
NPDESFiles
1Q10 (cfs)
10.76
Calculated in RPA
Permitted Flow (MGD)
1.5
NPDES permit application
Date: 3/10/2021
Permit Writer: Diana Yitbarek
Page 4 of 4

BICKPY
North Carolina
Life. Well Crafted.
Public Utilities
February 16, 2016
NCDENR
Division of Water Quality
Water Quality Section
Attn: NPDES unit
1617 Mail Service Center
Raleigh, NC 27699-1617
City of Hickory
Hickory Regional Laboratory
310 Cloninger Mill Rd.
Hickory, NC 28601
Phone: [phone]
Fax: [phone]
Email: [e-mail]
RECEIVED/NCDEQ DWR
FEB . 9 2016
Water Quality Section
Dear Sir/Madam,
Attached is a copy of the City of Hickory's Catawba POTW (NC0025542) PPA analyses.
If additional information is needed, please advise.
Sincerely,
Paula Prestwood
Senior Lab Technician
City of Hickory

Annual Monitoring and Pollutant Scan
Facility Name City of Hickory - Catawba POTW
Date of sampling 2/2/2016
Analytical Laboratory Pace Analytical Services, Inc.
NPDES #
ORC
Phone
Month
Year
February
2016
NC0025542
Watkins Bradberry
[phone]
, Y,,:'-' :,,,. , •-•,;,11,, -.,,,,;. , ,, ' ,'.--7:
„. --,i;
Paraineiii,-- c ,,, -- _ -
;,,,:-*A.-,,i1-::;7•,'--:-,,;• -..-,:
,,zssanipie.-':•
'-'_;7.i';PW:i.:V:'
'- •-'•L-4,•::;'?'--Y-.'" • •
Analytical
:'';':-.Metiiiiif-::=
r'' ', '''''''''''[ i;,:4,"`J':*;
. iiiiiiii40611,:
':':' Le41';:;::2::
!;;;- N.,-'.,,; ,:-,.•2 ',•.-: -,-''
kS,g114P-' f:
;,_; ReSii1i:7,:'
;y Att.,_,:4::::, ;,•:: .4,i,:
':,., •'''Yni',9fre-;4'
:,:ligaiiiienient
si,:,::,-,
Number of
!-;-1,: iiiniPleS--
Ammonia (as N)
Composite
350.1
0.10
ND
mg/L
1
Dissolved oxygen
Grab
Nitrate/Nitrite
Composite
353.2
0.20
15.1
mg/L
1
Total Kjeldahl nitrogen
Composite
351.2
0.50
ND
mg/L
1
Total Phosphorus
Composite
365.1
0.050
1.6
mg/L
1
Total dissolved solids
Composite
2540C
25.0
310
mg/L
1
Hardness
Composite
2340B
662
43400
ug/L
1
Chlorine (total residual, TRC)
Grab
Oil and grease
Grab
1664B
5.0
ND
mg/L
1
ii*iilir(irei;_iiirii''4iiiii0$1:6), ICiiiiicfe',''iiii,`" iiitlii4eiiiiii:;;',,W,:,:.:2::„ ;:2',3,rt ::..:',.,:51:; ii':•.'-:,;:i'6,':'k:::: -;''''',•%i:::-.e.:-.-f.-InfiZ.Y.:-:i.A:' :..'.:-.:'
-=':,:::. . :;:::"
Antimony
Composite
200.7
5.0
ND
ug/L
1
Arsenic
Composite
200.7
10.0
ND
ug/L
1
Beryllium
Composite
200.7
1.0
ND
ug/L
1
Cadmium
Composite
200.7
1.0
ND
ug/L
1
Chromium
Composite
200.7
5.0
ND
ug/L
1
Copper
Composite
200.7
5.0
5.2
ug/L
1
Lead
Composite
200.8
0.10
ND
ug/L
1
Mercury
Composite
1631E
0.50
2.29
ng/L
1
Nickel
Composite
200.7
5.0
ND
ug/L
1
Selenium
Composite
200.7
10.0
ND
ug/L
1
Silver
Composite
200.7
5.0
ND
ug/L
1
Thallium
Composite
200.7
10.0
ND
ug/L
1
Zinc -
Composite
200.7
10.0
55.8
ug/L
1
Cyanide
Grab
4500CNE
0.0080
ND
mg/L
1
Total phenolic compounds
Grab
420.4
0.010
0.011
mg/L
1
V4iaOle-,i)igliiiiOinii;iiliiiiit;',;,SI'',1:16:4-c!,:F," ''',";V:',1:',V';'','-\i:VA::•:. ll',',:-..1':.-;':-=:;_7::',.i:E!;:::1:1 j,' ' - -4:-.e;t.,4., ' ''.',A-tifi')7,.'"2
'',i:t•'''-,‘"
Acrolein
Grab
624
5.0
ND
ug/L
1
Acrylonitrile
Grab
624
50.0
ND
ug/L
1
Benzene
Grab
624
2.0
ND
ug/L
1
Bromoform
Grab
624
2.0
ND
ug/L
1
Carbon tetrachloride
Grab
624
2.0
ND
ug/L
1
Chlorobenzene
Grab
624
2.0
ND
ug/L
1
Chlorodibromomethane
Grab
624
2.0
ND
ug/L
1
Chloroethane
Grab
624
2.0
ND
ug/L
1
2-chloroethylvinylether
Grab
624
5.0
ND
ug/L
1
Chloroform
Grab
624
2.0
28.6
ug/L
1
Dichlorobromomethane
Grab
624
2.0
4.1
ug/L
1
1,1-dichloroethane
Grab
624
2.0
ND
ug/L
1
1,2-dichloroethane
Grab
624
2.0
ND
ug/L
1
Trans-1,2-dichloroethylene
Grab
624
2.0
ND
ug/L
1
Page 1

Annual Monitoring and Pollutant Scan
Facility Name: City of Hickory - Catawba POTW
NPDES #: NC0025542
Si-ra'Oietet, ' , ' j' : ,--
Ii:'11‘::9:',E':
,SAffif,i1--,
;1-iiiii)eZ'
:Analytical.,:
f_. lifilidi
4:21iii4ititi4priii-,
,I;T,,,,-;-:,,E1,:ii-,1:
Sample--',:'f
4 iC..:Il'e'iii f'-'
Units of ,
Miii4iieiiiiiitt:
i:. Phip'!n! of.:
:: .:,- samples - , •
: 74,I-Y;;;;6'44 .4;',:-', .=.: ....:`,i;'; r :1- ''' ', ' ,-_,\IV::;1:'::.. ,,' ,,,,,,,;
:A"? 's `•___
1 >1-dichloroethylene
Grab
624
2.0
ND
ug/L
1
1,2-dichloropropane
Grab
624
2.0
ND
ug/L
1
1,3-dichloropropylene
Grab
624
2.0
ND
ug/L
1
Ethylbenzene
Grab
624
2.0
ND
ug/L
1
Methyl bromide
Grab
624
2.0
4.4
ug/L
1
Methyl chloride
Grab
624
2.0
ND
ug/L
1
Methylene chloride
Grab
624
2.0
ND
ug/L
1
1,1,2,2-tetrachloroethane
Grab
624
2.0
ND
ug/L
1
Tetrachloroethylene
Grab
624
2.0
ND
ug/L
1
Toluene
Grab
624
2.0
ND
ug/L
1
1,1,1-trichloroethane
Grab
624
2.0
ND
ug/L
1
1,1,2-trichloroethane
Grab
624
2.0
ND
ug/L
1
Trichloroethylene
Grab
624
2.0
ND
ug/L
1
Vinyl chloride
Grab
624
2.0
ND
ug/L
1
Aiialiitieiiii;i::(3iig*ii *-' ,,,,:,;:'',,.,4:--_-,',:',141,:TA ,--::•il- :,' ,A- -.'-':F.;5,
P-chloro-m-creso
Grab
625
10.0
ND
ug/L
1
2-chlorophenol
Grab
625
5.0
ND
ug/L
1
2,4-dichlorophenol
Grab
625
5.0
ND
ug/L
1
2,4-dimethylphenol
Grab
625
10.0
ND
ug/L
1
4,6-dinitro-o-cresol
Grab
625
20.0
ND
ug/L
1
2,4-dinitrophenol
Grab
625
50.0
ND
ug/L
1
2-nitrophenol
Grab
625
5.0
ND
ug/L
1
4-nitrophenol
Grab
625
50.0
ND
ug/L
1
Pentachlorophenol
Grab
625
10.0
ND
ug/L
1
Phenol
Grab
625
5.0
ND
ug/L
1
2,4,6-trichlorophenol
Grab
625
10.0
ND
ug/L
1
ii-i--i,,,eiiiiii,!--•-'inciia.:Nt;:'i,:;; (q,',z',.-,i4, -.i:'-<-'-;"';';;;k‘-:';111':=1;`•-'!0-.1-!::-.:‘,i-:.•:!q2';,--,;,<,=4.,':'•-4.:=*'''jYK'-'.,;_:4'l's':':'‘,',','::.-4••-•27:',:i:'E rK"-,`' ''
Acenaphthene
Grab
625
5.0
ND
ug/L
1
Acenaphthylene
Grab
625
5.0
ND
ug/L
1
Anthracene
Grab
625
5.0
ND
ug/L
1
Benzidine
Grab
625
50.0
ND
ug/L
1
Benzo(a)anthracene
Grab
625
5.0
ND
ug/L
1
Benzo(a)pyrene
Grab
625
5.0
ND
ug/L
1
3,4 benzofluoranthene
Grab
625
5.0
ND
ug/L
1
Benzo(ghi)perylene
Grab
625
5.0
ND
ug/L
1
Benzo(k)fluoranthene
Grab
625
5.0
ND
ug/L
1
Bis (2-chloroethoxy)methane
Grab
625
10.0
ND
ug/L
1
Bis (2-chloroethyl)ether
Grab
625
5.0
ND
ug/L
1
Bis (2-chloroisopropyl)ether
Grab
625
5.0
ND
ug/L
1
Bis (2-ethylhexyl)phthalate
Grab
625
5.0
ND
ug/L
1
4-bromophenylphenylether
Grab
625
5.0
ND
ug/L
1
Butylbenzylphthalate
Grab
625
5.0
ND
ug/L
1
2-chloronaphthalene
Grab
625
5.0
ND
ug/L
1
4-chlorophenylphenylether
Grab
625
5.0
ND
ug/L
1
Page 2

Annual Monitoring and Pollutant Scan
Facility Name: City of Hickory - Catawba POTW -
NPDES #: NC0025542
- _ 1.
•'S
Pr yl., - t
a ain ei�
et
Ii
m� l'`
a e�.
r.,
S '+r
�o e.F:
":JIB �i`
nY�l�'h
A a t cal'>
Me�h'�
�iaifitatioii�
?LeveL,.;•<�.'
�Saiii"� le..'=,
Result�a.'=�
.i
``-Ua is of
a .
�Measuremeat�`
Number�o f.
`s am 11es;:
s ase=iieiiti0:: com0iinds`1(4 ii - -
Chrysene
Grab
625
5.0
ND
ug/L
1
Di-n-butyl phthalate
Grab
625
5.0
ND
ug/L
1
Di-n-octyl phthalate
Grab
625
5.0
ND
ug/L
1
Dibenzo(a,h)anthracene
Grab
625
5.0
ND
ug/L
1
1,2-dichlorobenzene
Grab
625
5.0
ND
ug/L
1
1,3-dichlorobenzene
Grab
625
5.0
ND
ug/L
1
1,4-dichlorobenzene
Grab
625
5.0
ND
ug/L
1
3,3-dichlorobenzidine
Grab
625
25.0
ND
ug/L
1
Diethyl phthalate
Grab
625
5.0
ND
ug/L
1
Dimethyl phthalate
Grab
625
5.0
ND
ug/L
1
2,4-dinitrotoluene
Grab
625
5.0
ND
ug/L
1
2,6-dinitrotoluene
Grab
625
5.0
ND
ug/L
1
1,2-diphenylhydrazine
Grab
625
5.0
ND
ug/L
1
Fluoranthene
Grab
625
5.0
ND
ug/L
1
Fluorene
Grab
625
5.0
ND
ug/L
1
Hexachlorobenzene
Grab
625
5.0
ND
ug/L
1
Hexachlorobutadiene
Grab
625
5.0
ND
ug/L
1
Hexachlorocyclo-pentadiene
Grab
625
10.0
ND
ug/L
1
Hexachloroethane
Grab
625
5.0
ND
ug/L
1
Indeno(1,2,3-cd)pyrene
Grab
625
5.0
ND
ug/L
1
Isophorone
Grab
625
10.0
ND
ug/L
1
Naphthalene
Grab
625
5.0
ND
ug/L
1
Nitrobenzene
Grab
625
5.0
ND
ug/L
1
N-nitrosodi-n-propylamine
Grab
625
5.0
ND
ug/L
1
N-nitrosodimethylamine
Grab
625
5.0
ND
ug/L
1
N-nitrosodiphenylamine
Grab
625
10.0
ND
ug/L
1
Phenanthrene
Grab
625
5.0
ND
ug/L
1
Pyrene
Grab
625
5.0
ND
ug/L
1
1,2,4,-trichlorobenzene
Grab
625
5.0
ND
ug/L
1
I certify under penalty of law that this document and all attachments were prepared under my direction
and supervision in accordance with a system to design to assure that qualified personnel properly
gather and evaluate the information submitted. Based on my inquiry of the person or persons that
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.
l.174 l7s/,`i? 5 arfrciberry
Authorized Representative name
rcf
Signature
Date " � — 6/6-
Page 3

HICKQRY
North Carolina
Life Well Crafted
Public Utilities
August 28, 2017
NCDEQ
Division of Water Resources
Water Quality Section
Attn: NPDES unit
1617 Mail Service Center
Raleigh, NC 27699-1617
City of Hickory
Hickory Regional Laboratory
310 Cloninger Mill Rd
Hickory, NC 28601
Phone [phone]
Fax [phone]
Email pprestwood@hickorync gov
RECEIVED/NCDEQ/DWR
SEP 01 2017
Water Quality
Permitting Section
Dear Sir/Madam,
Attached is a copy of the City of Hickory's Catawba POTW (NC0025542) PPA analyses.
If additional information is needed, please advise.
Sincerely,
Paula Prestwood
Senior Lab Technician
City of Hickory

Annual Monitoring and Pollutant Scan
Facility Name
Date of sampling
Analytical Laboratory
City of Hickory - Catawba POTW
8/8/2017
Pace Analytical Services, LLC
NPDES #
ORC
Phone
Month
Year
August
2017
NC0025542
Watkins Bradberry
[phone]
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Ammonia (as N)
Composite
350 1
0 10
ND
mg/L
1
Dissolved oxygen
Grab
1
Nitrate/Nitrite
Composite
353 2
0 020
1 9
mg/L
1
Total Kjeldahl nitrogen
Composite
351 2
0 50
0 64
mg/L
1
Total Phosphorus
Composite
365 1
0 25
5 2
mg/L
1
Total dissolved sohds
Composite
2540C
25 0
318
mg/L
1
Hardness
Composite
2340B
662
52700
ug/L
1
Chlorine (total residual, TRC)
Grab
1
Oil and grease
Grab
1664B
5 0
ND
mg/L
1
Metals (total recoverable), cyanide and total phenols
Antimony
Composite
200 7
5 0
ND
ug/L
1
Arsenic
Composite
200 7
10 0
ND
ug/L
1
Beryllium
Composite
200 7
1 0
ND
ug/L
1
Cadmium
Composite
200 7
1 0
ND
ug/L
1
Chromium
Composite
200 7
5 0
ND
ug/L
1
Copper
Composite
200 7
5 0
ND
ug/L
1
Lead
Composite
200 8
0 10
0 15
ug/L
1
Mercury
Grab
1631E
0 50
3 37
ng/L
1
Nickel
Composite
200 7
5 0
ND
ug/L
1
Selenium
Composite
200 7
10 0
ND
ug/L
1
Silver
Composite
200 7
5 0
ND
ug/L
1
Thalhum
Composite
200 7
10.0
ND
ug/L
1
Zinc
Composite
200 7
10 0
34 1
ug/L
1
Cyanide
Grab
4500CNE
0 0080
ND
mg/L
1
Total phenolic compounds
Grab
420 4
0 010
ND
mg/L
1
Volatile organic compounds
Acrolem
Grab
624
5 0
ND
ug/L
1
Acrylonitrile
Grab
624
50 0
ND
ug/L
1
Benzene
Grab
624
2 0
ND
ug/L
1
Bromoform
Grab
624
2 0
ND
ug/L
1
Carbon tetrachloride
Grab
624
2.0
ND
ug/L
1
Chlorobenzene
Grab
624
2 0
ND
ug/L
1
Chlorodibromomethane
Grab
624
2 0
ND
ug/L
1
Chloroethane
Grab
624
2 0
ND
ug/L
1
2-chloroethylvinylether
Grab
624
5 0
ND
ug/L
1
Chloroform
Grab
624
2 0
78 5
ug/L
1
Dichlorobromomethane
Grab
624
2 0
11 7
ug/L
1
1,1-dichloroethane
Grab
624
2 0
ND
ug/L
1
1,2-dichloroethane
Grab
624
2 0
ND
ug/L
1
Trans-1,2-dichloroethylene
Grab
624
2 0
ND
ug/L
1
Page 1

Annual Monitoring and Pollutant Scan
Facility Name: City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Volatile organic compounds (Cont.)
1,1-dichloroethylene
Grab
624
2 0
ND
ug/L
1
1,2-dichloropropane
Grab
624
2 0
ND
ug/L
1
1,3-dichloropropylene
Grab
624
2 0
ND
ug/L
1
Ethylbenzene
Grab
624
2 0
ND
ug/L
1
Methyl bromide
Grab
624
2.0
ND
ug/L
1
Methyl chloride
Grab
624
2 0
ND
ug/L
1
Methylene chloride
Grab
624
2 0
ND
ug/L
1
1,1,2,2-tetrachloroethane
Grab
624
2.0
ND
ug/L
1
Tetrachloroethylene
Grab
624
2 0
ND
ug/L
1
Toluene
Grab
624
2 0
ND
ug/L
1
1,1,1-trichloroethane
Grab
624
2 0
ND
ug/L
1
1,1,2-trichloroethane
Grab
624
2 0
ND
ug/L
1
Trichloroethylene
Grab
624
2 0
ND
ug/L
1
Vinyl chlonde
Grab
624
2 0
ND
ug/L
1
Acid -extractable compounds
P-chloro-m-creso
Grab
625
10 0
ND
ug/L
1
2-chlorophenol
Grab
625
5 0
ND
ug/L
1
2,4-dichlorophenol
Grab
625
5 0
ND
ug/L
1
2,4-dirnethylphenol
Grab
625
10 0
ND
ug/L
1
4,6-dmitro-o-cresol
Grab
625
20.0
ND
ug/L
1
2,4-dinitrophenol
Grab
625
50 0
ND
ug/L
1
2-nitrophenol
Grab
625
5 0
ND
ug/L
1
4-rutrophenol
Grab
625
50 0
ND
ug/L
1
Pentachlorophenol
Grab
625
10 0
ND
ug/L
1
Phenol
Grab
625
5 0
ND
ug/L
1
2,4,6-trichlorophenol
Grab
625
10 0
ND
ug/L
1
Base -neutral compounds
Acenaphthene
Grab
625
5.0
ND
ug/L
1
Acenaphthylene
Grab
625
5 0
ND
ug/L
1
Anthracene
Grab
625
5 0
ND
ug/L
1
Benzidme
Grab
625
50 0
ND
ug/L
1
Benzo(a)anthracene
Grab
625
5 0
ND
ug/L
1
Benzo(a)pyrene
Grab
625
5.0
ND
ug/L
1
3,4 benzofluoranthene
Grab
625
5 0
ND
ug/L
1
Benzo(ghi)perylene
Grab
625
5.0
ND
ug/L
1
Benzo(k)fluoranthene
Grab
625
5 0
ND
ug/L
1
Bis (2-chloroethoxy)methane
Grab
625
10.0
ND
ug/L
1
Bis (2-chloroethyl)ether
Grab
625
5 0
ND
ug/L
1
Bis (2-chloroisopropyl)ether
Grab
625
5 0
ND
ug/L
1
Bis (2-ethylhexyl)phthalate
Grab
625
5 0
ND
ug/L
1
4-bromophenylphenylether
Grab
625
5 0
ND
ug/L
1
Butylbenzylphthalate
Grab
625
5 0
ND
ug/L
1
2-chloronaphthalene
Grab
625
5 0
ND
ug/L
1
4-chlorophenylphenylether
Grab
625
5 0
ND
ug/L
1
Page 2

Annual Monitoring and Pollutant Scan
Facility Name:
City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Base -neutral compounds (cont.)
Chrysene
Grab
625
5
ND
ug/L
1
Di-n-butyl phthalate
Grab
625
5
ND
ug/L
1
Di-n-octyl phthalate
Grab
625
5
ND
ug/L
1
Dibenzo(a,h)anthracene
Grab
625
5
ND
ug/L
1
1,2-dichlorobenzene
Grab
625
5
ND
ug/L
1
1,3-dichlorobenzene
Grab
625
5
ND
ug/L
1
1,4-dichlorobenzene
Grab
625
5
ND
ug/L
1
3,3-dichlorobenzidine
Grab
625
25
ND
ug/L
1
Diethyl phthalate
Grab
625
5
ND
ug/L
1
Dimethyl phthalate
Grab
625
5
ND
ug/L
1
2,4-dinitrotoluene
Grab
625
5
ND
ug/L
1
2,6-dinitrotoluene
Grab
625
5
ND
ug/L
1
1,2-diphenylhydrazine
Grab
625
5
ND
ug/L
1
Fluoranthene
Grab
625
5
ND
ug/L
1
Fluorene
Grab
625
5
ND
ug/L
1
Hexachlorobenzene
Grab
625
5
ND
ug/L
1
Hexachlorobutadiene
Grab
625
5
ND
ug/L
1
Hexachlorocyclo-pentadiene
Grab
625
10
ND
ug/L
1
Hexachloroethane
Grab
625
5
ND
ug/L
1
Indeno(1,2,3-cd)pyrene
Grab
625
5
ND
ug/L
1
Isophorone
Grab
625
10
ND
ug/L
1
Naphthalene
Grab
625
5
ND
ug/L
1
Nitrobenzene
Grab
625
5
ND
ug/L
1
N-nitrosodi-n-propylamme
Grab
625
5
ND
ug/L
1
N-nitrosodimethylamine
Grab
625
5
ND
ug/L
1
N-mtrosodiphenylamme
Grab
625
10
ND
ug/L
1
Phenanthrene
Grab
625
5
ND
ug/L
1
Pyrene
Grab
625
5
ND
ug/L
1
1,2,4,-trichlorobenzene
Grab
625
5
ND
ug/L
1
I certify under penalty of law that this document and all attachments were prepared under my direction
and supervision in accordance with a system to design to assure that qualified personnel properly
gather and evaluate the information submitted. Based on my inquiry of the person or persons that
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 impnsonment for knowing violations.
W6C oA5 @cibCt7Cr
Authorized Representative n
p e
Signature
Date ,S'- 2 ? " 1-7
Page 3

faesNsoiNcol✓ngovm.
QILL 1 2 aS
WGRO 10KNLOFFVG
ooRLsV11.1- �1-0
Facility Name
Date of sampling
Analytical Laboratory
City of Hickory - Catawba POTW
11/6/2018
Pace Analytical
Annual Monitoring and Pollutant Scan
NPDES #
ORC
Phone
Month
Year
November
2018
NC0025542
Josh Archambault
[phone]
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Ammonia (as N)
Composite
350.1
0.10
1,0
mg/L
1
Dissolved oxygen
Grab
45000G
0.10
8.1
mg/L
1
Nitrate/Nitrite
Composite
353.2
0.020
3.0
mg/L
1
Total Kjeldahl nitrogen
Composite
351.2
0.50
1.7
mg/L
1
Total Phosphorus
Composite
365.1
0.050
1.2
mg/L
1
Total dissolved solids
Composite
2540C
25.0
219
mg/L
1
Hardness
Composite
2340E
662.0
40700
ug/L
1
Chlorine (total residual, TRC)
Grab
4500CLG
20.0
ND
ug/L
1
Oil and grease
Grab
1664E
5.0
ND
mg/L
1
Metals (total recoverable), cyanide and total phenols
Antimony
Composite
200.7
5.0
ND
ug/L
1
Arsenic
Composite
200.7
10.0
ND
ug/L
1
Beryllium
Composite
200.7
1.0
ND
ug/L
1
Cadmium
Composite
200.8
0.080
ND
ug/L
1
Chromium
Composite
200.7
5.0
ND
ug/L
1
Copper
Composite
200.8
1,0
3.9
ug/L
1
Lead
Composite
200.7
5.0
ND
ug/L
1
Mercury
Grab
1631E
0.50
3.18
ng/L
1
Nickel
Composite
200.7
5.0
ND
ug/L
1
Selenium
Composite
200.8
0.50
ND
ug/L
1
Silver
Composite
200.8
0.50
ND
ug/L
1
Thallium
Composite
200.7
5.0
ND
ug/L
1
Zinc
Composite
200.7
10.0
49.1
ug/L
1
Cyanide
Grab
4500CNE
0.0080
ND
mg/L
1
Total phenolic compounds
Grab
420.4
0.010
ND
mg/L
1
Volatile organic compounds
Acrolein
Grab
624
5.0
ND
ug/L
1
Acrylonitrile
Grab
624
50.0
ND
ug/L
1
Benzene
Grab
624
2.0
ND
ug/L
1
Bromoform
Grab
624
2.0
ND
ug/L
1
Carbon tetrachloride
Grab
624
2.0
ND
ug/L
1
Chlorobenzene
Grab
624
2.0
ND
ug/L
1
Chlorodibromomethane
Grab
624
2.0
ND
ug/L
1
Chloroethane
Grab
624
2.0
ND
ug/L
1
2-chloroethylvinylether
Grab
624
5.0
ND
ug/L
1
Chloroform
Grab
624
2.0
ND
ug/L
1
Dichlorobromomethane
Grab
624
2.0
ND
ug/L
1
1,1-dichloroethane
Grab
624
2.0
ND
ug/L
1
1,2-dichloroethane
Grab
624
2.0
ND
ug/L
1
Trans-1,2-dichloroethylene
Grab
624
2.0
ND
ug/L
1
Page 1

Annual Monitoring and Pollutant Scan
Facility Name: City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Volatile organic compounds (Cont.)
1,1-dichloroethylene
Grab
624
2.0
ND
ug/L
1
1,2-dichloropropane
Grab
624
2.0
ND
ug/L
1
1,3-dichloropropylene
Grab
624
2.0
ND
ug/L
1
Ethylbenzene
Grab
624
2.0
ND
ug/L
1
Methyl bromide
Grab
624
2.0
11.7
ug/L
1
Methyl chloride
Grab
624
2.0
ND
ug/L
1
Methylene chloride
Grab
624
2.0
ND
ug/L
1
1,1,2,2-tetrachloroethane
Grab
624
2.0
ND
ug/L
1
Tetrachloroethylene
Grab
624
2.0
ND
ug/L
1
Toluene
Grab
624
2.0
ND
ug/L
1
1,1,1-trichloroethane
Grab
624
2.0
ND
ug/L
1
1,1,2-trichloroethane
Grab
624
2.0
ND
ug/L
1
Trichloroethylene
Grab
624
2.0
ND
ug/L
1
Vinyl chloride
Grab
624
2.0
ND
ug/L
1
Acid -extractable compounds
P-chloro-m-creso
Grab
625
9.4
ND
ug/L
1
2-chlorophenol
Grab
625
4.7
ND
ug/L
1
2,4-dichlorophenol
Grab
625
4.7
ND
ug/L
1
2,4-dimethylphenol
Grab
625
9.4
ND
ug/L
1
4,6-dinitro-o-cresol
Grab
625
18.9
ND
ug/L
1
2,4-dinitrophenol
Grab
625
47.2
ND
ug/L
1
2-nitrophenol
Grab
625
4.7
ND
ug/L
1
4-nitrophenol
Grab
625
47.2
ND
ug/L
1
Pentachlorophenol
Grab
625
9.4
ND
ug/L
1
Phenol
Grab
625
4.7
ND
ug/L
1
2,4,6-trichlorophenol
Grab
625
9.4
ND
ug/L
1
Ease -neutral compounds
Acenaphthene
Grab
625
4.7
ND
ug/L
1
Acenaphthylene
Grab
625
4.7
ND
ug/L
1
Anthracene
Grab
625
4.7
ND
ug/L
1
Benzidine
Grab
625
47.2
ND
ug/L
1
Benzo(a)anthracene
Grab
625
4.7
ND
ug/L
1
Benzo(a)pyrene
Grab
625
4.7
ND
ug/L
1
3,4 benzofluoranthene
Grab
625
4.7
ND
ug/L
1
Benzo(ghi)perylene
Grab
625
4.7
ND
ug/L
1
Benzo(k)fluoranthene
Grab
625
4.7
ND
ug/L
1
Bis (2-chloroethoxy)methane
Grab
625
9.4
ND
ug/L
1
Bis (2-chloroethyl)ether
Grab
625
4.7
ND
ug/L
1
Bis (2-chloroisopropyl)ether
Grab
625
4.7
ND
ug/L
1
Bis (2-ethylhexyl)phthalate
Grab
625
4.7
ND
ug/L
1
4-bromophenylphenylether
Grab
625
4.7
ND
ug/L
1
Butylbenzylphthalate
Grab
625
4.7
ND
ug/L
1
2-chloronaphthalene
Grab
625
4.7
ND
ug/L
1
4-chlorophenylphenylether
Grab
625
4.7
ND
ug/L
1
Page 2

Annual Monitoring and Pollutant Scan
Facility Name:
City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Number of
samples
Base -neutral compounds (cont.)
Chrysene
Grab
625
4.7
ND
ug/L
1
Di-n-butyl phthalate
Grab
625
4.7
ND
ug/L
1
Di-n-octyl phthalate
Grab
625
4.7
ND
ug/L
1
Dibenzo(a,h)anthracene
Grab
625
4.7
ND
ug/L
1
1,2-dichlorobenzene
Grab
625
4.7
ND
ug/L
1
1,3-dichlorobenzene
Grab
625
4.7
ND
ug/L
1
1,4-dichlorobenzene
Grab
625
4.7
ND
ug/L
1
3,3-dichlorobenzidine
Grab
625
23.6
ND
ug/L
1
Diethyl phthalate
Grab
625
4.7
ND
ug/L
1
Dimethyl phthalate
Grab
625
4.7
ND
ug/L
1
2,4-dinitrotoluene
Grab
625
4.7
ND
ug/L
1
2,6-dinitrotoluene
Grab
625
4.7
7.3
ug/L
1
1,2-diphenylhydrazine
Grab
625
4.7
ND
ug/L
1
Fluoranthene
Grab
625
4.7
ND
ug/L
1
Fluorene
Grab
625
4.7
ND
ug/L
1
Hexachlorobenzene
Grab
625
4.7
ND
ug/L
1
Hexachlorobutadiene
Grab
625
4.7
ND
ug/L
1
Hexachlorocyclo-pentadiene
Grab
625
9.4
ND
ug/L
1
Hexachloroethane
Grab
625
4.7
ND
ug/L
1
Indeno(1,2,3-cd}pyrene
Grab
625
4.7
ND
ug/L
1
Isophorone
Grab
625
9.4
ND
ug/L
1
Naphthalene
Grab
625
4.7
ND
ug/L
1
Nitrobenzene
Grab
625
4.7
ND
ug/L
1
N-nitrosodi-n-propylamine
Grab
625
4.7
ND
ug/L
1
N-nitrosodimethylamine
Grab
625
4.7
ND
ug/L
1
N-nitrosodiphenylamine
Grab
625
9.4
ND
ug/L
1
Phenanthrene
Grab
625
4.7
ND
ug/L
1
Pyrene
Grab
625
4.7
ND
ug/L
1
1,2,4,-trichlorobenzene
Grab
625
4.7
ND
ug/L
1
I certify under penalty of law that this document and all attachments were prepared under my direction
and supervision in accordance with a system to design to assure that qualified personnel properly
gather and evaluate the information submitted. Based on my inquiry of the person or persons that
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.
s. 0 /rc1,c, - h 14
Authorized Representative name
ignature
Date ia - 6 -
Page 3

ED(NCO NRIDW51
JUN I 0 ?ON
Annual Monitoring and Pollutant Scan
WOROS
MOORESVILLE REGIONAL OFFICE
Facility Name
Date of sampling
Analytical Laboratory
City of Hickory - Catawba POTW
5/9/2019
Pace Analytical Services, LLC
NPDES #
ORC
Phone
Month
Year
May
2019
NC0025542
Josh Archambault
[phone]
Parameter
Parameter
Code
Sample '
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Ammonia (as N)
C0610
Composite
350.1
0.10
ND
mg/L
Dissolved oxygen
00300
Grab
45000G
0.10
7.76
mg/L
Nitrate/Nitrite
00630
Composite
353.2
0.040
0.64
mg/L
Total Kjeldahl nitrogen
00625
Composite
351.2
0.50
0.75
mg/L
Total Phosphorus
C0665
Composite
365.1
0.050
1.8
mg/L
Total dissolved solids
70295
Composite
2540C
25.0
308
mg/L
Hardness
00900
Composite
2340B
662
44800
ug/L
Chlorine (total residual, TRC)
50060
Grab
4500CLG
20.0
ND
ug/L
Oil and grease
00556
Grab
1664B
5.0
ND
mg/L
Metals (total recoverable), cyanide and total phenols
Antimony
01097
Composite
200.7
5.0
ND
ug/L
Arsenic
01002
Composite
200.7
10.0
ND
ug/L
Beryllium
01012
Composite
200.7
1.0
ND
ug/L
Cadmium
01027
Composite
200.8
0.080
ND
ug/L
Chromium
01034
Composite
200.7
5.0
ND
ug/L
Copper
01042
Composite
200.8
1.0
1.2
ug/L
Lead
01051
Composite
200.7
5.0
ND
ug/L
Mercury
COMER
Grab
1631E
0.50
0.883
ng/L
Nickel
01067
Composite
200.7
5.0
ND
ug/L
Selenium
01147
Composite
200.8
0.50
ND
ug/L
Silver
01077
Composite
200.8
0.50
ND
ug/L
Thallium
01059
Composite
200.7
10.0
ND
ug/L
Zinc
01092
Composite
200.7
10.0
37.4
ug/L
Cyanide
00720
Grab
4500CNE
0.0080
ND
mg/L
Total phenolic compounds
32730
Grab
420.4
0.020
0.022
mg/L
Volatile organic compounds
Acrolein
34210
Grab
624
5.0
ND
ug/L
Acrylonitrile
34215
Grab
624
50.0
ND
ug/L
Benzene
34030
Grab
624
1.0
ND
ug/L
Bromoform
32104
Grab
624
2.0
ND
ug/L
Carbon tetrachloride
32102
Grab
624
2.0
ND
ug/L
Chlorobenzene
34301
Grab
624
2.0
ND
ug/L
Chlorodibromomethane
34306
Grab
624
2.0
2.2
ug/L
Chloroethane
85811
Grab
624
2.0
ND
ug/L
2-chloroethylvinylether
34576
Grab
624
10.0
ND
ug/L
Chloroform
32106
Grab
624
5.0
73.0
ug/L
Dichlorobromomethane
32101
Grab
624
2.0
17.8
ug/L
1,1-dichloroethane
34496
Grab
624
2.0
ND
ug/L
1,2-dichloroethane
32103
Grab
624
2.0
ND
ug/L
Trans-1,2-dichloroethylene
34546
Grab
624
2.0
ND
ug/L
Page 1

Annual Monitoring and Pollutant Scan
Facility Name: City of hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Parameter
Code
Sample .`
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Volatile organic compounds (Cont.)
1,1-dichloroethylene
34501
Grab
624
2.0
ND
ug/L
1,2-dichloropropane
C0541
Grab
624
2.0
ND
ug/L
1,3-dichloropropylene
51044
Grab
624
2.0
ND
ug/L
Ethylbenzene
37371
Grab
624
1.0
ND
ug/L
Methyl bromide
34413
Grab
624
2.0
ND
ug/L
Methyl chloride
34418
Grab
624
2.0
ND
ug/L
Methylene chloride
34423
Grab
624
5.0
ND
ug/L
1,1,2,2-tetrachloroethane
34516
Grab
624
2.0
ND
ug/L
Tetrachloroethylene
34475
Grab
624
2.0
ND
ug/L
Toluene
34010
Grab
624
1.0
ND
ug/L
1,1,1-trichloroethane
34506
Grab
624
2.0
ND
ug/L
1,1,2-trichloroethane
34511
Grab
624
2.0
ND
ug/L
Trichloroethylene
39180
Grab
624
2.0
ND
ug/L
Vinyl chloride
39175
Grab
624
2.0
ND
ug/L
Acid -extractable compounds
P-chloro-m-creso
34452
Grab
625
10.0
ND
ug/L
2-chlorophenol
34586
Grab
625
5.0
ND
ug/L
2,4-dichlorophenol
34601
Grab
625
5.0
ND
ug/L
2,4-dimethylphenol
34606
Grab
625
10.0
ND
ug/L
4,6-dinitro-o-cresol
34657
Grab
625
20.0
ND
ug/L
2,4-dinitrophenol
34616
Grab
625
50.0
ND
ug/L
2-nitrophenol
34591
Grab
625
5.0
ND
ug/L
4-nitrophenol
34646
Grab
625
50.0
ND
ug/L
Pentachlorophenol
39032
Grab
625
10.0
ND
ug/L
Phenol
34694
Grab
625
5.0
ND
ug/L
2,4,6-trichlorophenol
34621
Grab
625
10.0
ND
ug/L
_
Base -neutral compounds
Acenaphthene
34205
Grab
625
5.0
ND
ug/L
Acenaphthylene
34200
Grab
625
5.0
ND
ug/L
Anthracene
CO220
Grab
625
5.0
ND
ug/L
Benzidine
39120
Grab
625
50.0
ND
ug/L
Benzo(a)anthracene
C0526
Grab
625
5.0
ND
ug/L
Benzo(a)pyrene
34247
Grab
625
5.0
ND
ug/L
3,4 benzofluoranthene
C0531
Grab
625
5.0
ND
ug/L
Benzo(ghi)perylene
34521
Grab
625
5.0
ND
ug/L
Benzo(k)fluoranthene
34242
Grab
625
5.0
ND
ug/L
Bis (2-chloroethoxy)methane
34278
Grab
625
10.0
ND
ug/L
Bis (2-chloroethyl)ether
34273
Grab
625
5.0
ND
ug/L
Bis (2-chloroisopropyl)ether
34283
Grab
625
5.0
ND
ug/L
Bis (2-ethylhexyl)phthalate
CO100
Grab
625
5.0
ND
ug/L
4-bromophenylphenylether
34636
Grab
625
5.0
ND
ug/L
Butylbenzylphthalate
CO292
Grab
625
5.0
ND
ug/L
2-chloronaphthalene
34581
Grab
625
5.0
ND
ug/L
4-chlorophenylphenylether
34641
Grab
625
5.0
ND
ug/L
Page 2

Annual Monitoring and Pollutant Scan
Facility Name: City of hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Parameter
Code
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Base -neutral compounds (cont.)
Chrysene
34320
Grab
625
5.0
ND
ug/L
Di-n-butyl phthalate
39110
Grab
625
5.0
ND
ug/L
Di-n-octyl phthalate
34596
Grab
625
5.0
ND
ug/L
Dibenzo(a,h)anthracene
34556
Grab
625
5.0
ND
ug/L
1,2-dichlorobenzene
34536
Grab
625
5.0
ND
ug/L
1,3-dichlorobenzene
34566
Grab
625
5.0
ND
ug/L
1,4-dichlorobenzene
34571
Grab
625
5.0
ND
ug/L
3,3-dichlorobenzidine
34631
Grab
625
25.0
ND
ug/L
Diethyl phthalate
34336
Grab
625
5.0
ND
ug/L
Dimethyl phthalate
34341
Grab
625
5.0
ND
ug/L
2,4-dinitrotoluene
34611
Grab
625
5.0
ND
ug/L
2,6-dinitrotoluene
CO626
Grab
625
5.0
ND
ug/L
1,2-diphenylhydrazine
34346
Grab
625
5.0
ND
ug/L
Fluoranthene
CO376
Grab
625
5.0
ND
ug/L
Fluorene
34381
Grab
625
5.0
ND
ug/L
Hexachlorobenzene
CO700
Grab
625
5.0
ND
ug/L
Hexachlorobutadiene
CO702
Grab
625
5.0
ND
ug/L
Hexachlorocyclo-pentadiene
34386
Grab
625
10.0
ND
ug/L
Hexachloroethane
CO396
Grab
625
5.0
ND
ug/L
Indeno(1,2,3-cd)pyrene
34403
Grab
625
5.0
ND
ug/L
Isophorone
34408
Grab
625
10.0
ND
ug/L
Naphthalene
34696
Grab
625
5.0
ND
ug/L
Nitrobenzene
34447
Grab
625
5.0
ND
ug/L
N-nitrosodi-n-propylamine
34428
Grab
625
5.0
ND
ug/L
N-nitrosodimethylamine
34438
Grab
625
5.0
ND
ug/L
N-nitrosodiphenylamine
34433
Grab
625
10.0
ND
ug/L
Phenanthrene
34461
Grab
625
5.0
ND
ug/L
Pyrene
34469
Grab
625
5.0
ND
ug/L
1,2,4,-trichlorobenzene
CO551
Grab
625
5.0
ND
ug/L
"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 managed 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 thereare significant
penalties for submitting false information, including the posibility of fines and imprisonment for
knowing violations."
Josh,, b,• c( flr c f b Ck i 4-
Authorized Representative name
Date t--5- -i
Page 3

North Carolina
Life. - Veil „rafted.
Public Utilities
February 27, 2020
Division of Water Resources
610 E. Center Ave.
Suite 301
Mooresville, NC 28115
City of Hickory
Hickory Regional Laboratory
310 Cloninger Mill Rd.
Hickory, NC 28601
Phone: [phone]
Fax: [phone]
Email: [e-mail]
RECEIVEDINCDENR/DWR
MAR -
WOROS
MOORIERAIILLE REGIONAL OFFION
Dear Sir/Madam,
Attached is a copy of the City of Hickory's Catawba POTW (NC0025542) PPA analyses.
If additional information is needed, please advise.
Sincerely,
Paula Prestwood
Senior Lab Technician
City of Hickory

Annual Monitoring and Pollutant Scan
Facility Name
Date of sampling
Analytical Laboratory
City of Hickory - Catawba POTW
2/4/2020
Pace Analytical
NPDES #
ORC
Phone
Month
February
ear
NC0025542
Josh Archambault
[phone]
Parameter
Parameter
Code
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Ammonia (as N)
CO610
Composite
350.1
0.10
5.1
mg/L
Dissolved oxygen
00300
Grab
4500OG
0.10
10.0
mg/L
Nitrate/Nitrite
00630
Composite
353.2
0.040
2.6
mg/L
Total Kjeldahl nitrogen
00625
Composite
351.2
0.50
6.1
mg/L
Total Phosphorus
CO665
Composite
365.1
0.050
0.21
mg/L
Total dissolved solids
70295
Composite
2540C
25.0
327
mg/L
Hardness
00900
Composite
2340B
662
39400
ug/L
Chlorine (total residual, TRC)
50060
Grab
4500CLG
20.0
ND
ug/L
Oil and grease
00556
Grab
1664B
5.0
ND
mg/L
Metals (total recoverable), cyanide and total phenols
Antimony
01097
Composite
200.7
5.0
ND
ug/L
Arsenic
01002
Composite
200.7
10.0
ND
ug/L
Beryllium
01012
Composite
200.7
1.0
ND
ug/L
Cadmium
01027
Composite
200.8
0.080
ND
ug/L
Chromium
01034
Composite
200.7
5.0
ND
ug/L
Copper
01042
Composite
200.8
1.0
4.8
ug/L
Lead
01051
Composite
200.7
5.0
ND
ug/L
Mercury
COMER
Grab
1631E
0.50
1.77
ng/L
Nickel
01067
Composite
200.7
5.0
ND
ug/L
Selenium
01147
Composite
200.8
0.50
ND
ug/L
Silver
01077
Composite
200.8
0.50
ND
ug/L
Thallium
01059
Composite
200.7
10.0
ND
ug/L
Zinc
01092
Composite
200.7
10.0
430
ug/L
Cyanide
00720
Grab
4500CNE
0.0080
ND
mg/L
Total phenolic compounds
32730
Grab
420.4
0.020
ND
mg/L
Volatile organic compounds
Acrolein
34210
Grab
624
5.0
ND
ug/L
Acrylonitrile
34215
Grab
624
5.0
ND
ug/L
Benzene
34030
Grab
624
1.0
ND
ug/L
Bromoform
32104
Grab
624
2.0
ND
ug/L
Carbon tetrachloride
32102
Grab
624
2.0
ND
ug/L
Chlorobenzene
34301
Grab
624
2.0
ND
ug/L
Chlorodibromomethane
34306
Grab
624
2.0
ND
ug/L
Chloroethane
85811
Grab
624
2.0
ND
ug/L
2-chloroethylvinylether
34576
Grab
624
5.0
ND
ug/L
Chloroform
32106
Grab
624
2.0
7.7
ug/L
Dichlorobromomethane
32101
Grab
624
2.0
ND
ug/L
1,1-dichloroethane
34496
Grab
624
2.0
ND
ug/L
1,2-dichloroethane
32103
Grab
624
2.0
ND
ug/L
Trans-1,2-dichloroethylene
34546
Grab
624
2.0
ND
ug/L
Page 1

Annual Monitoring and Pollutant Scan
Facility Name:
City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Parameter
Code
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Volatile organic compounds (Cont.)
1,1-dichloroethylene
34501
Grab
624
2.0
ND
ug/L
1,2-dichloropropane
CO541
Grab
624
2.0
ND
ug/L
1,3-dichloropropylene
51044
Grab
624
2.0
ND
ug/L
Ethylbenzene
37371
Grab
624
1.0
ND
ug/L
Methyl bromide
34413
Grab
624
2.0
ND
ug/L
Methyl chloride
34418
Grab
624
2.0
ND
ug/L
Methylene chloride
34423
Grab
624
2.0
ND
ug/L
1,1,2,2-tetrachloroethane
34516
Grab
624
2.0
ND
ug/L
Tetrachloroethylene
34475
Grab
624
2.0
ND
ug/L
Toluene
34010
Grab
624
1.0
ND
ug/L
1,1,1-trichloroethane
34506
Grab
624
2.0
ND
ug/L
1,1,2-trichloroethane
34511
Grab
624
2.0
ND
ug/L
Trichloroethylene
39180
Grab
624
2.0
ND
ug/L
Vinyl chloride
39175
Grab
624
2.0
ND
ug/L
Acid -extractable compounds
P-chloro-m-creso
34452
Grab
625
10.0
ND
ug/L
2-chlorophenol
34586
Grab
625
5.0
ND
ug/L
2,4-dichlorophenol
34601
Grab
625
5.0
ND
ug/L
2,4-dimethylphenol
34606
Grab
625
10.0
ND
ug/L
4,6-dinitro-o-cresol
34657
Grab
625
10.0
ND
ug/L
2,4-dinitrophenol
34616
Grab
625
50.0
ND
ug/L
2-nitrophenol
34591
Grab
625
5.0
ND
ug/L
4-nitrophenol
34646
Grab
625
50.0
ND
ug/L
Pentachlorophenol
39032
Grab
625
10.0
ND
ug/L
Phenol
34694
Grab
625
5.0
ND
ug/L
2,4,6-trichlorophenol
34621
Grab
625
10.0
ND
ug/L
Base -neutral compounds
Acenaphthene
34205
Grab
625
5.0
ND
ug/L
Acenaphthylene
34200
Grab
625
5.0
ND
ug/L
Anthracene
CO220
Grab
625
5.0
ND
ug/L
Benzidine
39120
Grab
625
50.0
ND
ug/L
Benzo(a)anthracene
CO526
Grab
625
5.0
ND
ug/L
Benzo(a)pyrene
34247
Grab
625
5.0
ND
ug/L
3,4 benzofluoranthene
CO531
Grab
625
5.0
ND
ug/L
Benzo(ghi)perylene
34521
Grab
625
5.0
ND
ug/L
Benzo(k)fluoranthene
34242
Grab
625
5.0
ND
ug/L
Bis (2-chloroethoxy)methane
34278
Grab
625
10.0
ND
ug/L
Bis (2-chloroethyl)ether
34273
Grab
625
5.0
ND
ug/L
Bis (2-chloroisopropyl)ether
34283
Grab
625
5.0
ND
ug/L
Bis (2-ethylhexyl)phthalate
CO100
Grab
625
5.0
ND
ug/L
4-bromophenylphenylether
34636
Grab
625
5.0
ND
ug/L
Butylbenzylphthalate
CO292
Grab
625
5.0
ND
ug/L
2-chloronaphthalene
34581
Grab
625
5.0
ND
ug/L
4-chlorophenylphenylether
34641
Grab
625
5.0
ND
ug/L
Page 2

Annual Monitoring and Pollutant Scan
Facility Name: City of Hickory - Catawba POTW
NPDES #: NC0025542
Parameter
Parameter
Code
Sample
Type
Analytical
Method
Quantitation
Level
Sample
Result
Units of
Measurement
Base -neutral compounds (cont.)
Chrysene
34320
Grab
625
5.0
ND
ug/L
Di-n-butyl phthalate
39110
Grab
625
5.0
ND
ug/L
Di-n-octyl phthalate
34596
Grab
625
5.0
ND
ug/L
Dibenzo(a,h)anthracene
34556
Grab
625
5.0
ND
ug/L
1,2-dichlorobenzene
34536
Grab
625
5.0
ND
ug/L
1,3-dichlorobenzene
34566
Grab
625
5.0
ND
ug/L
1,4-dichlorobenzene
34571
Grab
625
5.0
ND
ug/L
3,3-dichlorobenzidine
34631
Grab
625
25.0
ND
ug/L
Diethyl phthalate
34336
Grab
625
5.0
ND
ug/L
Dimethyl phthalate
34341
Grab
625
5.0
ND
ug/L
2,4-dinitrotoluene
34611
Grab
625
5.0
ND
ug/L
2,6-dinitrotoluene
C0626
Grab
625
5.0
ND
ug/L
1,2-diphenylhydrazine
34346
Grab
625
5.0
ND
ug/L
Fluoranthene
C0376
Grab
625
5.0
ND
ug/L
Fluorene
34381
Grab
625
5.0
ND
ug/L
Hexachlorobenzene
CO700
Grab
625
5.0
ND
ug/L
Hexachlorobutadiene
CO702
Grab
625
5.0
ND
ug/L
Hexachlorocyclo-pentadiene
34386
Grab
625
10.0
ND
ug/L
Hexachloroethane
CO396
Grab
625
5.0
ND
ug/L
Indeno(1,2,3-cd)pyrene
34403
Grab
625
5.0
ND
ug/L
Isophorone
34408
Grab
625
10.0
ND
ug/L
Naphthalene
34696
Grab
625
5.0
ND
ug/L
Nitrobenzene
34447
Grab
625
5.0
ND
ug/L
N-nitrosodi-n-propylamine
34428
Grab
625
5.0
ND
ug/L
N-nitrosodimethylamine
34438
Grab
625
5.0
ND
ug/L
N-nitrosodiphenylamine
34433
Grab
625
10.0
ND
ug/L
Phenanthrene
34461
Grab
625
5.0
ND
ug/L
Pyrene
34469
Grab
625
5.0
ND
ug/L
1,2,4,-trichlorobenzene
C0551
Grab
625
5.0
ND
ug/L
"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 managed 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 thereare significant
penalties for submitting false information, including the posibility of fines and imprisonment for
knowing violations."
jk ircl�oMDacA(�
Authoriped Rep ese ative hne
gnature
Date
-090
//gik-e-
Page 3

ROY COOPER
Governor
DIONNE DELLI-GATTI
Secretary
5, DANIEL SMITH NORTH CANA.
D rector Environmental Qrtalit
MEMORANDUM
To:
April 6, 2021
Clinton Cook
NC DEQ / DWR / Public Water Supply
Mooresville Regional Office
From: Diana Yitbarek
NC DEQ / DWR / Municipal Permitting Unit
Subject: Review of Draft NPDES Permit NC0025542
Hickory -Catawba WWTP
Catawba County
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
May 6, 2021. If you have any questions on the draft permit, please contact me at 919-707-9130 or via
e-mail [diana.yitbarek(a7ncdenr.gov].
RESPONSE: (Check one)
§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§
Concur with the issuance of this permit provided the facility is operated and maintained properly,
the stated effluent limits are met prior to discharge, and the discharge does not contravene the
designated water quality standards.
Concurs with issuance of the above permit, : ,-
T. liA,V6 No APft.: Ikeel.F,° ExreK-7156 IN r`(ei, (`(Et lrAr'Iot•C U ' Tie cLeAt..1 b ATC-te,
ACT"''Et ,uirea-lF:s,fAN!? (AVC t lI JlrtAL U JP TAN I & Z2 - 4E It•-iFe) iArk nj
ZPiP 702 , S , z uz.. r �'. i -Aif & No 13/K G f j2 ¶P©51 J& TU-{ I✓ f ir-t cr.
Opposes the issuance of the above permit, based on reasons stated below, or attached:
Signature:
Date: 4,7z7I ZP:2_'
NoCareslinir0epartment of Environmental i t+alit}' 1 Division of Water Resources
S1Z7vort15Salisbury Street 1 1617 Mall Service
919.707.9000
North Carolina 27699-1617

Hickory Daily Record
Advertising Affidavit
PO Box 968
Hickory, NC 28603
NCDEQ/DWR
ATTN: WREN THEDFORD
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3611028
Date
April 07, 2021
Date
Category Description
Ad Number Ad Size
04/07/2021
Legal Notices
Public Notice North Carolina Environmental Management Comi 0000711963
2x29L
Publisher of
Hickory Daily Record
Catawba County
Before the undersigned, a Notary Public duly commissioned, qualified,
and authorized by law to administer oaths, personally appeared the
Publisher's Representative who by being duly sworn deposes and says:
that he/she is authorized to make this affidavit and sworn statement; that
the notice or other legal advertisement, a copy of which is attached hereto,
was published in the Daily Record on the following dates:
04/07/2021
and that the said newspaper in which such notice, paper document, or
legal advertisement was published, was at the time of each and every such
publication, a newspaper meeting all the requirements and qualifications
of Section 1-597 of the General Statutes of North CaroYtna.
Billing Representative
Newspaper reference: 0000711963
Sworn to and subscribed before me, this 7th day of April, 2021.
wary Public
State of Virginia
County of Hanover
My commission expires:
Richard A. Hundley
Notary Public
Commonwealth of Virginia
Notary Hegistratidn No. 7904041
Commission Exp. Jan 31, 2024
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

North na Environmental Mara emer't Commissio PDES Unit
1617 Mail Service Center
Ralet h NC Z7699-1617
Notice of Intent to Issue a NPDES Wastewater Permit NC0025542 Caa-
ermm to person(S)
propoWWTP The North Carolina Environmental ses to issue a NPDES wastewater dischargep permit
the ion
listed below. Written comments regarding the proposed permit will be hoid . puDi hearing
ac-
cepted until 30 days alter the publish date of this notice. The Director o
significant degree of public interest. Please mail com-
ments NC Division of Water Resources (DWR)may
ments there a DWR at the above address. Interest-
ed persons
sod/omayvinformation requests to Street, Raleigh, NC
ed persons visit the DWR at 512 N. Salisbury
wm information nc DESate
27604 to this lmay on on ourtwebs to h atrod .nc. per-
mits and this notice may w t r_ e r s- rm its w st w to -
divis on t r res urc
1.
The City of Hickory (P.O. Box 398, Hickory, N.C. 8603) has requested re-
newal
Catawba Wastewater
located in Catawba County. This permitted facility
of NPDES Permit NC0025542 for its Hickory
Treatment Plant, en, total
intreated rent domestic mical oxygenodemand, dissolved Catawba
bn River
Basin. Currently, pH, ammonia, total residual chlorine,
andsusmethyl
solids, fecal water qualityer limited arameters in the permit.
and misch ge may affecttfutureallocations pin this segment of Lyle
This discharge
Creek. Publish: April 7, 2021.