HomeMy WebLinkAboutNCG590044_Fact Sheet_20240222NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO079821 / NCG590044
Sydney Deuterman / Compliance & Expedited Permitting Unit / sydney.deuterman&deq.nc.gov / Feb 2024
FACILITY INFORMATION
Facility Name
R.A. Thomas Water Treatment Plant (WTP)
Applicant Name
City of Winston-Salem / William Brewer, WTP Superintendent
Applicant Contact Email
billb&cityofws.org
Applicant Mailing Address
PO Box 2511, Winston-Salem, NC 27107
Facility Physical Address
1201 S. Martin Luther King Jr. Dr., Winston-Salem, NC 27107
Max, Monthly Avg Flow (MGD)
0.6514 MGD
Type of Waste
Filter backwash and decant from lagoons
Facility Class
PC-1
County
Forsyth
Permit Status
I Renewal/Transfer
Regional Office
I WSRO
STREAM CHARACTERISTICS
Receiving Stream
UT to Salem Creek
(Middle Fork Muddy Creek)
Stream
Classification
C
Stream Segment
12-94-12-(4)
Outfall Lat.
360 05' 13" N
7Q10 - Summer (cfs)
0
Outfall Long.
800 13' 05.4" W
7Q10 - Winter (cfs)
0
Drainage basin
Yadkin Pee -Dee
30Q2 (cfs)
0
Subbasin
03-07-04
Average Flow (cfs)
0
HUC
030401011304
IWC (%)
100%
303(d) List
Impaired — see section below
FACILITY SUMMARY
R.A. Thomas WTP operates a conventional water treatment plant with a design potable flow rate of 18
MGD and an estimated wastewater discharge of 0.6514 MGD (based on the maximum, monthly average
over the past three years). This facility utilizes coagulation, flocculation, sedimentation, filtration, and
disinfection for the treatment of potable water and wastewater. Raw water is sourced from the Yadkin River
and Salem Lake. The facility consists of the following wastewater treatment units;
• one (1) poly -blend unit for wash water polymer
• two (2) metering pumps for sodium bisulfite feed
• two (2) tanks [400-gallon for sodium bisulfite]
• one (1) equalization basin [0.55 MG for wash water retention]
• four (4) EQ wash water pumps [1.12 MGD each for pumping wash water to clarifier]
• one (1) wash water clarifier [0.40 MG for wash water treatment]
• three (3) residual station waste pumps [0.20 MGD each for pumping basin residuals to
residual lagoons for drying]
• two (2) residuals lagoons [1.76 MG's each]
• one (1) flume flow meter
• Chemical usage consists o£
o aluminum sulfate
o fluoride
o sodium bisulfite
o sodium hypochlorite
o sodium hydroxide
o zinc orthophosphate
o wash water polymer
o potassium permanganate
Fact Sheet for Permit RenewaVrransfer
Feb 2024 - NPDES Permit NC007982UNCG590044 - Page 1
RECEIVING STREAM — 303(d) LIST
The R.A. Thomas WTP discharges to an unnamed tributary to Salem Creek (Middle Fork Muddy Creek).
Salem Creek runs from the Winston-Salem Water Supply Dam at Salem Lake to Muddy Creek. This
receiving stream is listed as impaired on the 2022 303(d) list. The segment of the receiving stream which
the WTP discharges to (12-94-12-(4)a) is impaired for Fish Community, while the downstream segments
are impaired for Benthos, Copper, Zinc, and Turbidity.
RENEWAL SUMMARY
The facility has requested to transfer coverage to the NCG590000 General Permit. Based on the general
permit's requirements, they are eligible for coverage and will be switching over. The new permit number is
NCG590044. The individual permit will be rescinded.
COMPLIANCE HISTORY
R.A. Thomas WTP had no enforcements during the last permit cycle, however an NOD was issued for
monitoring Turbidity in September 2018. The most recent inspection (January 2023) showed the facility to
be in compliance.
NCG59 GENERAL PERMIT ELIGIBILITY
• Conventional treatment technology - eligible
• They've passed > 75% of TOX tests within the last 4 years — eligible
• They've passed all of the last four TOX tests — eligible
• No metal limits required — eligible
• Conclusion: Eligible for NCG59 General Permit.
WHOLE EFFLUENT TOXICITY (WET) TESTING
In accordance with current strategies designating this facility as a conventional water treatment plant to
freshwater, WET testing is required in this permit as Quarterly, Chronic [TGP3B] Pass/Fall Limit with
Ceriodaphnia dubia at an effluent concentration of 90%. This facility has passed every toxicity test
except one (July 2021) in the last 3 years.
REASONABLE POTENTIAL ANALYSIS
A reasonable potential analysis (RPA) was performed for a discharger going to a freshwater stream. A flow
(Qw) of 0.6514 MGD was used based on the maximum, monthly average flow between Dec 2020 and Dec
2023.
Based on this analysis, the following permitting actions are proposed for this permit:
• Copper — no detections, so no reasonable potential to exceed water quality standards; monthly
monitoring should be maintained as it is a parameter of concern and the data submitted was not
reported down to the PQL.
• Fluoride — no reasonable potential to exceed water quality standards; monthly monitoring should
be maintained as it is a parameter of concern, and the permittee has indicated it has the potential to
be discharged.
• Zinc — no reasonable potential to exceed water quality standards; maintaining monthly monitoring
should be maintained as it is a parameter of concern, and the permittee has indicated it has the
potential to be discharged.
Fact Sheet for Permit RenewaVrransfer
Feb 2024 - NPDES Permit NCO07982UNCG590044 - Page 2
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
City of Winston-Salem
Attn: William Brewer, WTP Superintendent
PO Box 2511
Winston-Salem, NC 27107
Dear Mr. Brewer:
NORTH CAROLINA
Environmental Quality
January 18, 2024
Subject: Request for Additional Information
NPDES Renewal Application
NCO079821
R.A. Thomas WTP
Forsyth County
On August 1, 2014, the Division of Water Resources (DWR) issued General Permit NPDES NCG590000 for
wastewaters from Greensand and Conventional type water treatment plants. This permit was developed to
expedite the issuance and reissuance of these types of permits.
The City of Winston-Salem's existing Individual NPDES permit for its R.A. Thomas Water Treatment Plant
(WTP) at is up for renewal and qualifies for coverage under NCG590000. The annual permit fee for the general
permit is $100 verses $1,150 for an Individual permit and monitoring is less frequent than that listed in
NC0079821.
Similar to Individual NPDES permits, General Permits expire every five years but all permittees with coverage
under this general permit do not have to submit a renewal application. The General Permit is reissued every five
years and all Permittees covered under it will receive a new Certificate of Coverage automatically if all permit
annual fees have been paid.
To switch to the General permit, the City of Winston-Salem will need to make a written request to DWR. Please
note, the issuance of the General Permit would require the rescission of your individual permit. The Division
suggests that you review the attached file containing the General Permit and decide whether you would like the
Division to renew the individual permit or proceed with issuance of a Certificate of Coverage for the WTP. Note
that the R.A. Thomas WTP operates a greensand water treatment system that discharges to freshwater, so the
facility would be subject to the limitations listed on page 7 (B. (3) Conventional WTP Effluent Limitations and
Monitoring Requirements — Discharging to Freshwater) in the attached General permit.
To request that the Division proceed with issuing the General Permit instead of renewing the existing Individual
permit, the City should respond with the wording below, or equivalent text:
The City of Winston-Salem has reviewed the Division of Water Resources General Permit
NCG5900000 for greensand and conventional type water treatment plants and requests that
the discharge from the R.A. Thomas WTP be covered under this new general permit. The City
of Winston-Salem understands that the Division will rescind the individual NPDES permit for
the R.A. Thomas WTP NC0079821 when the Certificate of Coverage for the General Permit
NCG590000 is issued to the City of Winston-Salem for the WTP.
North Carolina Department of Environmental Quality I Division of Water Resources
NORTH CAROUNA
!lI 512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617
919.707.9000
oePemmem ofenv�ronmemai auai\ /�
Page 2 of 2
Request for Additional Info
NCO079821 Renewal
The written request shall be signed by an authorized City of Winston-Salem official in accordance with 15A
NCAC 02H .0106(e).
If you have questions concerning this matter, please contact me via e-mail at sydney.deutermankdeq.nc.gov.
Please let me know how you would like us to proceed within the next two weeks, preferably by February 1,
2024. If we do not get a response by that date, the Division will proceed with the renewal of individual permit
NC0079821.
Sincerely,
16bJ��
Sydney Deuterman
Environmental Specialist II
NPDES Compliance and Expedited Permitting
Attachments: NCG590000 General Permit & Technical Bulletin
cc: NPDES File [Laserfiche]
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
!ll��� 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORrH CARO[. NA 919.707.9000
oepanmem of envi--tai auar�
Winston Sabrm / Forsyth County
uteletibities
Watvr + aslrwaler •
Administration, P.O. Box 2511, Winston-Salem, NC 27102
336-727-8000 • wsfcutilities.org
January 19, 2024
Sydney Deuterman — Environmental Specialist II
NC DEQ - NPDES Compliance Expedited Permitting
512 North Salisbury Street
Raleigh, NC 27699-1617
Dear Ms. Deuterman,
The City of Winston-Salem has reviewed the Division of Water Resources General Permit NCG590000 for
greensand and conventional type water treatment plants and requests that the discharge from the R.A.
Thomas WTP be covered under this new general permit. The City of Winston-Salem understands that
the Division will rescind the individual NPDES permit for the R.A. Thomas WTP — NCO079821 when the
Certificate of Coverage for the General Permit NCG590000 is issued to the City of Winston-Salem for the
water treatment plant.
Thank you for your consideration of this matter. Should you have any questions please feel free to
contact me by email at or by phone at 336-727-2161.
Sincerely,
William C. Brewer
Deputy Director of Utilities — Water/Wastewater Treatment
*rliF . iu+ TO : m -FRWF City Council: Mayor Allen Joines; Mayor Pro Tern pore Denise D. Adams, North Ward; Barbara Hanes Burke, Northeast Ward; Robert C. Clark, West Ward;
John C. Larson, South Ward; Jeff Maclntosh, Northwest Ward; Kevin Mundy, Southwest Ward; Annette Scippio, East Ward; James Taylor, Jr., Southeast Ward;
City Manager W. Patrick Pate
County Commissioners: Chair Don Martin; Vice Chair Gloria D. Whisenhunt; Dan Besse; Richard V. Linville; Tonya D. McDaniel; David R. Plylen, Malishai
� CALL. IL1 ' i,. r�:ra:±' Woodbury; County Manager Dudley Watts, Jr.
TEXT. 355�481-LINK Winston-Salem/Forsyth County Utility Commission: Chair L. Wesley Curtis, Jr.; Vice Chair Chris Parker; Simpson O. Brown, Jr.; Stephen Doughton; Harold
r-t,jii�k d,-Opfw-,,Pq Eustache; Tom Griffin; Yvonne H. Hines; Hugh W. Jernigan; Duane Long; Calvin McRae; Charles Wilson
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57
58
REASONABLE POTENTIAL ANALYSIS
H2
Use "PASTE SPECIAL
Effluent Hardness Values" then "COPY" Upstream Hardness
. Maximum data
points = 58
Date Data
BDL=1/2DL
7/8/2019
12
12
10/7/2019
23
23
1/13/2020
22
22
4/6/2020
20
20
7/6/2020
22
22
10/5/2020
16
16
1 /4/2021
18
18
4/5/2021
18
18
7/6/2021
22
22
10/4/2021
20
20
1/3/2022
24
24
4/4/2022
22
22
7/5/2022
44
44
10/3/2022
22
22
1 /3/2023
12
12
4/3/2023
16
16
7/3/2023
27
27
10/2/2023
28
28
Results
Std Dev.
7.1061
Mean
21.5556
C.V.
0.3297
n
18
10th Per value
14.80 mg/L
Average Value
21.56 mg/L
Max. Value
44.00 mg/L
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
1 7/8/2019
54
54
Std Dev.
8.1746
2 10/7/2019
58
58
Mean
59.0000
3 1/13/2020
67
67
C.V.
0.1386
4 4/6/2020
63
63
n
18
5 7/6/2020
57
57
10th Per value
49.40 mg/L
6 10/5/2020
50
50
Average Value
59.00 mg/L
7 1/4/2021
66
66
Max. Value
69.00 mg/L
8 4/5/2021
64
64
9 7/6/2021
60
60
10 10/4/2021
62
62
11 1/3/2022
36
36
12 4/4/2022
68
68
13 7/5/2022
69
69
14 10/3/2022
61
61
15 1/3/2023
56
56
16 4/3/2023
48
48
17 7/3/2023
63
63
18 10/2/2023
60
60
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
-1-
79821 FW RPA 2024, data
1 /18/2024
REASONABLE POTENTIAL ANALYSIS
ill
Date Data
1 7/8/2019 <
2 10/7/2019 <
3 1/13/2020 <
4 4/6/2020 <
5 7/6/2020 <
6 10/5/2020 <
7 1/4/2021 <
8 4/5/2021 <
9 7/6/2021 <
10 10/4/2021 <
11 1/3/2022 <
12 4/4/2022 <
13 7/5/2022 <
14 10/3/2022 <
15 1/3/2023 <
16 4/3/2023 <
17 7/3/2023 <
18 10/2/2023 <
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
Copper
BDL=1/2DL
Results
10 5
Std Dev.
10 5
Mean
10 5
C.V.
10 5
n
10 5
10 5
Mu It Factor =
10 5
Max. Value
10 5
Max. Pred Cw
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58 Par13
5.0000
0.0000
18
1.00
5.00 ug/L
5.00 ug/L
Use "PASTE SPECIAL
Fluoride Values" then "COPY"
. Maximum data
points = 58
Date
Data
BDL=1/2DL
Results
1
7/8/2019
170
170
Std Dev.
44.3545
2
10/7/2019
180
180
Mean
185.5556
3
1/13/2020
190
190
C.V.
0.2390
4
4/6/2020
250
250
n
18
5
7/6/2020
150
150
6
10/5/2020
180
180
Mult Factor =
1.16
7
1/4/2021
150
150
Max. Value
250.0 ug/L
8
4/5/2021
230
230
Max. Pred Cw
290.0 ug/L
9
7/6/2021
170
170
10
10/4/2021
190
190
11
1/3/2022
240
240
12
4/4/2022
210
210
13
7/5/2022
210
210
14
10/3/2022
160
160
15
1/3/2023
< 100
50
16
4/3/2023
200
200
17
7/3/2023
200
200
18
10/2/2023
210
210
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
-2-
79821 FW RPA 2024, data
1 /18/2024
REASONABLE POTENTIAL ANALYSIS
1
2
3
4
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
Zinc
Values" then "COPY"
. Maximum data
points = 58
Date Data
BDL=1/2DL
Results
7/8/2019
37
37
Std Dev.
10.9054
10/7/2019
25
25
Mean
37.1111
1/13/2020
50
50
C.V.
0.2939
4/6/2020
55
55
n
18
7/6/2020
40
40
10/5/2020
45
45
Mult Factor =
1.20
1/4/2021
53
53
Max. Value
55.0 ug/L
4/5/2021
43
43
Max. Pred Cw
66.0 ug/L
7/6/2021
42
42
10/4/2021
35
35
1 /3/2022
43
43
4/4/2022
42
42
7/5/2022
17
17
10/3/2022
30
30
1 /3/2023
32
32
4/3/2023
35
35
7/3/2023
21
21
10/2/2023
23
23
-3-
79821 FW RPA 2024, data
1 /18/2024