NC0080853_Fact Sheet_20240222

NCDEQ/DWR/NPDES
FACT SHEET - FOR EXPIDITED RENEWAL
NPDES PERMIT NCO080853 — Revised DRAFT v3
Table 1 --Facility Information
Applicant/Facility Name: Nokia of America Corporation WWTP
Applicant Address: 3370 Old Lexington Road,Winston-Salem
Facility Address: Salem Business Park(same as above)
Facility Contacts: John Galasso,Remediation Manager [e-mail]]
Conan Fitzgerald,PE 919-461-1291 [[e-mail]
Permitted Flow/Actual Revised by the Permittee to 0.062 MGD [as calculation error, 16Nov2023]
Flow: 0.070 (5- ear ave.); 0.050 (ave. last 9 months)
Type of Waste: GW-REM for chlorinated hydrocarbons and 1-4,Dioxane
WWTP Class/Permit WPCS Class PC-1 /
Status: Active; Renewal
County: Forsyth County
Miscellaneous
Receiving Stream: UT to Salem Creek Regional Office: Winston-Salem(WSRO)
Stream Class/Segment: Class C/ 12-94-12-(4) State Grid/ Winston Salem East,NC
USGSQuad:
No?Downstream,Yes
303(d)Listed?/NO Middle Fork Salem Creek
INFO Impaired for Fecal/ Permit Writer: Joe R. Coiporon, P.G.
recreation
Hydrological Unit: 03-07-04 Date: Updated 221762024
HUC: 0304010113
s7Q10 (cfs) 0.0
w7Q 10 (cfs) 0.0
Average Flow(cfs): 0.0
IWC (%): 100%
Outfall:
• Permittee requests to Lat. 360 03' 18"N
Comments on DRAFT: revise permitted flow. Long. 80' 13' 5 1"W
• BIMS receiving-
stream flow corrected.
For Renewal: Nokia of America Corporation (Nokia or the Permittee)proposes no operational changes
to the currently permitted groundwater treatment system featuring a low-profile air stripper.
BACKGROUND/SITE HISTORY--There is no folder/no records for Nokia [NC0080853] on the
server's NPDES Permit Files.Nokia submitted updates to the previous permit on January 2,2019,
approved by DWR, as summarized as:
• Granulated Activated Carbon(GAC)was noted as back-up in the prior permit, available in the
event of an increase in influent contaminant concentrations,however a GAC filter was not used.
• On March 22,2021,AECOM notified NCDEQ's Water Quality Permitting Section of Nokia's
intention to discontinue filtration. AECOM noted that the filters were part of the permitted
treatment system,primarily to prevent clogging within the GAC filters.
• Removed GAC units from normal operation eliminating the need to maintain the filtration units.
They remain in the treatment building but have been bypassed, as approved by the Water Quality
Permitting Section by email the same day that the request was made.
Page 1 of 8

• Chemical additives, formerly added to control fouling,were eliminated prior to the January 2019
permit.As was confirmed by email correspondence with the Water Quality Permitting Section on
February 13,2023,no additional analyses beyond what is required under the permit is necessary
for this submittal.
RECEIVING STREAM INFORMATION-Nokia's WWTP discharges to an unnamed tributary(UT)to
upper Salem Creek,classified C within the Upper Yadkin,Yadkin Pee-Dee River Basin. The facility
treats local groundwater for chlorinated hydrocarbons lost to the environment-no domestic discharge.
Although the water quality of the UT is unknown(no data),the downstream segment of Salem Creek is
impaired for fecal coliform/recreation likely due to the dense industrial and urban population.
It is significant to note for this renewal that the Basinwide Information System(BIMS)reflects
receiving-stream flows consistent with the mainstem of Salem Creek—not the UT at the outfall.
Therefore,until new stream data are provided,this renewal assumes zero flow conditions [7Q10/30Q2
=0.0 cfs], i.e., an instream waste concentration(IWC)= 100%. This Renewal will update BIMS.
INSTREAM MONITORING-monitoring not previously required/no changes recommended.
SUMMARY OF REPORTED DATA(JAN202 I-SEP2023)
Table 2
Effluent Characteristics Minimum Average Maximum Sample Count
Flow MGD 0.005 0.070 0.10 949
Total Suspended Solids m /L 0.2 2.35 2.6 35
Oil and Grease(per 100 ml 4.8 6.55 39.5 34
1,4 Dioxane( /L) 3.4 5.89 8.4 10
Tetrachloroethylene (µg/L) 1 1.0 1.9 1 3.9 33
INSPECTION/CORRESPONDENCE-WSRO last inspected the facility and generated a Staff Report
dated 140ct2021. Inspector Gary Hudson thus described the facility: "The ground water remediation site
appeared to be very well maintained."
PERMIT COMPLIANCE-During Nokia's previous two(2)years,WET testing resulted in four(4)
notices of violation [NOV/NODs]; one(1)resulted in a frequency violation and two(2)violations
resulted in enforcement cases (Table 3).
Table 3
CILrI MONTH TEAR N710L DATE UNITS TIDE ACTION CONM ENT UPDATE
Nokia 4 2023 04/20/2023 WET violation Proceed to Enforce NC NOV molly_nicholson
Nokia 3 2023 03/22/2023 WET violation Proceed to NOV NC NOV molly.nicholson
Nokia 2 2023 02/09/2023 WET violation Proceed to Enforce NC NOV 001 molly.nicholson
Nokia 12 2022 Effluent 1A dioxane 12/31/2022 ug/1 Frequency Proceed to NOD gary.hudson
Nokia 12 2022 12/06/2022 WET violation Proceed to NOV NC NOV 001 molly-nicholson
Nokia 9 2022 09/06/2022 WET violation Proceed to NOV NC NOV madison.myers
Nokia 3 2022 03/15/2022 WET violation Proceed to NOV NC NOV zach.thomas
SUMMARY/JUSTIFICATION for RENEWAL-REVISED
1. Effluent Flow-Based on input from the Permittee, and on effluent flow data averages from the
previous permit cycle,permitted effluent flow is revised from the previous 0.302 MGD to 0.062
MGD for this renewal.
2. Receiving-Stream Flows in BIMS are suspected to reflect the mainstem of Salem Creek
[Ave flow=0.40 cfs; 30Q2=0.14 cfs; 7Q10w=0.13 cfs; and 7Q10s=0.05 cfs]. It is
unlikely that these flows represent the unnamed tributary(UT)upstream at the outfall.
Page 2 of 8

It follows therefore that DWR has applied zero flow [7Q 10/30Q2=0.0 cfs] to recalculate
reasonable potential analyses(RPAs)and wasteload allocations(WLAs)for this revised
draft v2.Renewal assumes IWC= 100%. BIMS will reflect these data until new UT stream
flows may be provided.
3. Public Notice-Because of recent changes in discharge and receiving-stream flow, additional
Public Notice is required[per EPA].
4. Tetrachloroethylene(PCE)—based on revised IWC at 100%, PCE continues to show
reasonable potential to exceed its surface water-quality standard. Therefore,monitoring
continues Monthly with limits in accord with the RPA.New Limits=3.3 µg/L Monthly
Average(MA), and Daily Max(DM)=6.6 µg/L(MA x 2).
5. O&G—renewal revises the previous analytical parameter code from 00556 to 00552 (as
appropriate for industrial discharges); added limits of 15 mg/L MA and 30 mg/L DM.
6. TSS—renewal retains 30 mg/L as DM [anti-backsliding] and adds 15 mg/L MA [EPA
requires both limits].
7. 1,4-Dioxane effluent data do not show reasonable potential[see attached RPA MAX
Predicted= 10 µg/L,Allowable=80 µg/L]. However,influent 1,4-Dioxane is NOT
remediated by current treatment technology(air striping) and reportedly originates from
offsite. Therefore,renewal considers 1,4-Dioxane a new parameter of concern [see RPA].
Monitoring is hereby revised from Quarterly to Monthly without limits, in order to establish
a viable effluent database [Table A. (1.)].Monitoring and reporting are subject to Special
Condition A. (4.).
8. pH- added monitoring to the permit[as required by EPA for all industrial discharges]
9. Updates - Supplement to Permit Cover Sheet, other permit texts, Electronic Reporting [A.
(5.)] and the Site Map.
REVISED SCHEDULE OF ISSUANCE
Draft Permit to Public Notice: November 15, 2023
Re-draft to Public Notice January 23, 2024
Permit submitted for final signature February 23, 2024
Permit scheduled to issue (Tentative) March 14, 2024
Effective Date (Tentative) April 1, 2024
NPDES DIVISION CONTACT
If you have questions on any of the above information or on the attached permit,please email Joe R.
Corporon,P.G. [e-mail]].
I
NAME: DATE: UPDATED 22FEB2024
Page 3 of 8

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 5. NC Dissolved Metals Water Quality Standard s/A uatic Life Protection
Parameter Acute FW, µg/1 Chronic FW, Acute SW, µg/l Chronic SW,
(Dissolved) µg/1 (Dissolved) µg/l
(Dissolved) (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 213.0200 (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, /l
Cadmium, Acute WER*{1.136672-[ln hardness](0.041838)} e"{0.9151 [In
hardness]-3.14851
Cadmium, Acute Trout WER*{1.136672-[ln hardness](0.041838)} e^{0.9151[ln
waters hardness]-3.62361
Page 4 of 8

Cadmium, Chronic WER*{1.101672-[ln hardness](0.041838){ e"{0.7998[1n
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*{1.46203-[ln hardness](0.145712){ • e All.273[ln hardness]-
1.460}
Lead, Chronic WER*{1.46203-[ln 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{
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.
Page 5 of 8

1. To perform a RPA on the Freshwater hardness-dependent metals the Permit Writer
compiles the following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically
calculates the 1 Q 10 using the formula 1 Q 10= 0.843 (s7Q 10, cfs) 0.993
• Effluent hardness and upstream hardness, site-specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness-dependent metal of concern
and for each individual discharge, the Permit Writer must first determine what effluent
and instream(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for
any hardness data and contacts the Permittee to see if any additional data is available for
instream hardness values,upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation
using a default hardness of 25 mg/L (CaCO3 or(Ca+Mg)). Minimum and maximum
limits on the hardness value used for water quality calculations are 25 mg/L and 400
mg/L, respectively.
If the use of a default hardness value results in a hardness-dependent metal showing
reasonable potential, the permit writer contacts the Permittee and requests 5 site-specific
effluent and upstream hardness samples over a period of one week. The RPA is rerun
using the new data.
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) x (s7Q 10, cfs *Avg. Upstream Hardness,
mg/L)
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the IQ 10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total
recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site-specific
translators, if any have been developed using federally approved methodology.
Page 6 of 8

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:
Caiss = 1
Ctotal 1 + { [Kpo] [ss(I I a)I [10-1] }
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
4. The numeric standard for each metal of concern is divided by the default partition
coefficient(or site-specific translator)to obtain a Total Recoverable Metal at ambient
conditions.
In some cases, where an EPA default partition coefficient translator does not exist(ie.
silver), the dissolved numeric standard for each metal of concern is divided by the EPA
conversion factor to obtain a Total Recoverable Metal at ambient conditions. This
method presumes that the metal is dissolved to the same extent as it was during EPA's
criteria development for metals. For more information on conversion factors see the June,
1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable
concentration (permit limits) for each pollutant using the following equation:
Ca= (s7Q 10+ Qw)Cwgs)—(s7Q10) (C121
Qw
Where: Ca=allowable effluent concentration (µg/L or mg/L)
Cwqs =NC Water Quality Standard or federal criteria(µg/L or mg/L)
Cb=background concentration: assume zero for all toxicants except NH3* (µg/L or
mg/L)
Qw=permitted effluent flow (cfs, match s7Q 10)
s7Q 10= summer low flow used to protect aquatic life from chronic toxicity and
human health through the consumption of water, fish, and shellfish from
noncarcinogens (cfs)
* Discussions are on-going with EPA on how best to address background
concentrations
Flows other than s7Q 10 may be incorporated as applicable:
IQ 10 =used in the equation to protect aquatic life from acute toxicity
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
Page 7 of 8

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 (RPA) for this
permit included:
Parameter Value Comments (Data Source)
Average Effluent Hardness (mg/L) N/A Metals/Hardness not
[Total as, CaCO3 or(Ca+Mg)] monitored.
Average Upstream Hardness (mg/L) N/A Metals/Hardness not
[Total as, CaCO3 or(Ca+Mg)] monitored.
7Q10 summer(cfs) 0.0
1 Q 10 (cfs) 0.0
Permitted Flow (MGD) — Revised from 0.30 to 0.062
Page 8 of 8

WINSIY)N-SALENI
JOURNAL
See Proof on Next Page
AFFIDAVIT OF PUBLICATION
Winston-Salem Journal
418 N Marshall St
[phone]
State of Florida, County of Orange, ss:
Before the undersigned, a Notary Public duly commissioned,
qualified, and authorized by law to administer oaths, personally
appeared the Publisher's Representative, Laquansay Nickson
Watkins,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 Winston-Salem Journal 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
Carolina.
PUBLICATION DATES:
Jan. 27, 2024
NOTICE ID: eNSAB7iUJOgNaLEbfC5E
PUBLISHER ID: COL-NC-600054
NOTICE NAME: NC0080853
Publication Fee: $320.00
(signed) i�Q�ctQ/�dOff
J�Adky ii,� PAMELA BAE
64'
C : Notary Public•State c f Florida
VERIFICATION Commissionst,i.,
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• Expires on - k .
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State of Florida
County of Orange
Subscribed in my presence and sworn to before me on this: 02/01/20 4
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Notary Public
Notarized online using audio-video communication
NCO080853 - Page 1 of 2

Public Notice
North Carolina Environmental Management Commission/NPDES Unit
1617 Mail Service Center
Raleigh,NC 2 76 99-16 1 7
The North Carolina Environmental Management Commission proposes
to issue a NPDES wastewater discharge permit to the person(s)listed
below. Written comments regarding the proposed permit will be accept-
ed until 30 days after the publish date of this notice.The Director of the
NC Division of Water Resources(DWR)may hold a public hearing should
there be a significant degree of public interest. Please mail comments
and/or information requests to DWR at the above address. Interested
persons may visit the DWR at 512 N.Salisbury Street,Raleigh,NC 27604
to review the information on file. Additional information on NPDES per-
mits and this notice may be found on our website:https://deq.nc,govl
public-notices-hearings,or by calling(919)707-3601. Nokia of America,
3370 Old Lexington Road,requests to renew permit NCO080853 for its
groundwater rernediation treatment plant,Winston-Sale,Forsyth Coun-
ty.This facility discharges to a UT to Salem Creek,Yadkin River Basin.
he parameter Tetrach oroethylene(PCE)is water-quality limited.This
discharge may affect future wasteload allocations in this portion of the
Yadkin River Basin.
WSJ:January 27,2024.COL-NC-600054
NC0080853 - Page 2 of 2

2014 Generic RPA- 95% Probability/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information Table 2. Parameters of Concern
❑CHECK IF HQW OR ORW Name Type Chronic Modifier Acute PQL Units
Facility Name Nokia of America Corporation Par01
WWTP/WTP Class PC-1 Par02
NPDES Permit NCO080853 Par03
Outfall 001 Par04
Flow,Qw(MGD) 0.062 Par05 Tetrachloroethene C 3.3 FW 3.3 pg/L
Receiving Stream LIT to Salem Creek Par06
Stream Class C Par07
7Q10s(cfs) 0.00 Par08
7Q10w(cfs) 0.00 Par09
30Q2(cfs) 0.00 Par10
QA(cfs) Par11
1Q10s(cfs) 0.00 Par12
Data Source(s) FLOW(not weather-dependednt):calculated using Par13 1,4 Dioxane C 80 FW 80 pg/L
❑CHECK TO APPLY MODEL 0.062 MGD average over the past two(2)years Par14 Oil&Grease NC 15 FW 20 mg/L
Par15
Par16
Par17
Par18
Follow directions for data entry. In some cases a Par19
comment menu list the available choices or a Par20
dropdown menu will provide a list you may select
from.Error message occur if data entry does not Par21
meet input criteria. Par22
80853 Nokia RPA v7 zero flow 21 Dec2023, input
2/23/2024

REASONABLE POTENTIAL ANALYSIS
80853 Nokia RPA v7 zero flow 21 Dec2023,data
1 2/23/2024

REASONABLE POTENTIAL ANALYSIS
Tetrachloroethene Values"then"COPY" '1,4 Dioxane Values"then"COPY"
.Maximum data points .Maximum data points
=58 =58
Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results
1 2021 3.9 3.9 Std Dev. 1.0077 1 2021 5.5 5.5 Std Dev. 1.2982
2 2021 2.4 2.4 Mean 1.7788 2 2021 5.3 5.3 Mean 5.8900
3 2021 1.4 1.4 C.V. 0.5665 3 2021 5.6 5.6 C.V. 0.2204
4 2021 < 1 0.5 n 33 4 2021 6.6 6.6 n 10
5 2021 < 1 0.5 5 2022 5.9 5.9
6 2021 1.5 1.5 Mult Factor= 1.1600 6 2022 5.3 5.3 Mult Factor= 1.2400
7 2021 1.1 1.1 Max.Value 3.9 Ng/L 7 2022 7 7 Max.Value 8.4 Itg/L
8 2021 < 1 0.5 Max.Fred Cw 4.5 pg/L 8 2023 8.4 8.4 Max.Fred Cw 10.4 Ng/L
9 2021 < 1 0.5 9 2023 5.9 5.9
10 2021 1.4 1.4 10 2023 3.4 3.4
11 2021 1.4 1.4 11
12 2021 2.9 2.9 12
13 2022 1.8 1.8 13
14 2022 < 1 0.5 14
15 2022 < 1 0.5 15
16 2022 2.1 2.1 16
17 2022 1.6 1.6 17
18 2022 2.6 2.6 18
19 2022 1.5 1.5 19
20 2022 < 1 0.5 20
21 2022 1.5 1.5 21
22 2022 1.2 1.2 22
23 2022 1.4 1.4 23
24 2022 2.7 2.7 24
25 2023 2.9 2.9 25
26 2023 3.4 3.4 26
27 2023 3.5 3.5 27
28 2023 < 1 0.5 28
29 2023 2.5 2.5 29
30 2023 2.1 2.1 30
31 2023 2.3 2.3 31
32 2023 2.5 2.5 32
33 2023 3.1 3.1 33
34 34
35 35
36 36
37 37
38 38
39 39
40 40
41 41
42 42
43 43
44 44
45 45
46 46
47 47
48 48
49 49
50 50
51 51
52 52
53 53
54 54
55 55
56 56
57 57
58 58
80853 Nokia RPA v7 zero flow 21 Dec2023,data
-2- 2/23/2024

REASONABLE POTENTIAL ANALYSIS
Oil&Grease Values"then"COPY"
.Maximum data points
=58
Date Data BDL=1/2DL Results
1 2021 < 5 2.5 Std Dev. 7.1837
2 2021 < 5 2.5 Mean 4.3103
3 2021 < 5 2.5 C.V. 1.6666
4 2021 < 5 2.5 n 34
5 2021 < 5.1 2.55
6 2021 < 4.9 2.45 Mult Factor= 1.3600
7 2021 22.9 22.9 Max.Value 39.5 mg/L
8 2021 < 5 2.5 Max.Fred Cw 53.7 mg/L
9 2021 < 4.9 2.45
10 2021 < 4.9 2.45
11 2021 < 4.9 2.45
12 2021 < 4.8 2.4
13 2021 < 4.9 2.45
14 2022 < 4.9 2.45
15 2022 < 5 2.5
16 2022 < 5 2.5
17 2022 < 4.9 2.45
18 2022 < 5 2.5
19 2022 < 4.9 2.45
20 2022 < 4.9 2.45
21 2022 < 4.8 2.4
22 2022 < 4.9 2.45
23 2022 < 4.8 2.4
24 2022 < 4.9 2.45
25 2022 < 4.9 2.45
26 2023 < 4.9 2.45
27 2023 < 4.9 2.45
28 2023 39.5 39.5
29 2023 < 4.9 2.45
30 2023 < 4.9 2.45
31 2023 7.9 7.9
32 2023 < 4.9 2.45
33 2023 < 4.8 2.4
34 2023 < 4.9 2.45
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
80853 Nokia RPA v7 zero flow 21 Dec2023,data
-3- 2/23/2024

Nokia of America Corporation REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO080853 2014 Generic RPA-95% Probability/95% Confidence Qw = 0.062 MGD
MAXIMUM DATA POINTS=58
Qw(MGD)= 0.06 WWTP/WTP Class: PC-1
1Q10S(cfs)= 0.00 IWC @1Q10S = 100.00%
7QIOS(cfs)= 0.00 IWC @ 7Q10S= 100.00%
7Q10W(cfs)= 0.00 IWC @ 7Q10W= 100.00%
30Q2(cfs)= 0.00 IWC @ 30Q2= 100.00%
Avg.Stream Flow,QA(cfs)= NO CIA DATA IWC @ QA= N/A
Receiving Stream: UT to Salem Creek Stream Class: C
PARAMETER TYPE STANDARDS&CRITERIA(2) REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION
J
(1) NC WQS/ Applied '/2 FAV/ a z Max Pred
Chronic Standard Acute ' n #Det. Cw Allowable Cw
Tetrachloroethene C 3.3 FW 3.3 µg/L 33 25 4.5
Acute: 3.3 RPA for non-AL-apply Monthly Monitoring with Limit
_ _____ ____
Chronic: 3.3 RPA for non-AL-apply Monthly Monitoring with Limit
3 values >Allowable Cw
Acute: 80 No RP, Predicted Max<50%of Allowbale Cw-
However,current treatment system does not
1,4 Dioxane C 80 FW 80 µg/L 10 10 10 rememdiate.Therefore,Monitor Monthly with
Iimits.Add Compliance Period.
Chronic: 80 No RP, Predicted Max<50—%of A- owbale Cw-
However,current treatment system does not
NO DETECTS No value>Allowable Cw rememdiate.Therefore,Monitor Monthly with
Iimits.Add Compliance Period.
Acute: 20 RP=Yes;parameter of concern;add limits;retain
Oil&Grease NC 15 FW 20 mg/L 34 3 54 Monthly monioring
Chronic: 15 RP=Yes;parameter of concern;add limits;retain
2 value(s)>Allowable Cw Monthly monioring
80853 Nokia RPA v7 zero flow 21 Dec2023,rpa
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