WQ0001026_Annual Performance_20240215

Performance Annual Report
I. General Information
Facility/System Name: City of Washington WWTP/System
Responsible Entity: City of Washington
Persons in Charge/Contact: Lonnie Woolard/Michael Mitchell
Applicable Permits: NC0020648 / NC0081191 / WQ0019179
WQ0001026 / WQCS00087
Description of Treatment Process and Collection System:
Wastewater Treatment Plant — 3.65 MGD WWTP consisting of influent metering, mechanical
bar screens, automatic aerated grit chamber, splitter box, aeration basin, two activated sludge
oxidation ditches, four secondary clarifiers with scum removal and pumped return sludge, five
tertiary deep bed denitrification sand filters with methanol storage and feed system, dual
parallel chlorine contact chambers with flow paced liquid sodium hypochlorite feed, sodium
bisulfite dechlorination system, post aeration, lime storage tower and dual lime injection vaults,
caustic soda and alum feed system, four concrete sludge thickening lagoons, sludge
recirculation pump station, effluent pump station, discharge into Tar River and water reuse
system.
Collection System — Collection system consists of 74.035 miles of gravity sewer mains from 6"
to 24" in diameter and 30.354 miles of force mains with 5329 service connections.
II. Performance
Permit Violations / Environmental Regulations:
February 24, 2023: — An estimated 1000 gallons of wastewater spilled from the Runyon Creek
Outfall line with approximately 50 gallons entering into Runyon Creek. This spill was a result of
a failure in the sewer line. Equipment was used to dike the ditch while repairs were being
made. The sewer was then pumped out of the ditch and discharged back into the collection
system. No known environmental impacts occurred as a result of the spill.
December 13, 2023:- An estimated 20 gallons of wastewater spilled into a storm drain at 300
N. Market Street. This spill was a result of someone removing the sewer clean out lid because
of a blockage in the sewer line. The sewer line was cleared of obstruction, the vac truck was
used to clean the area, and the sewer clean out lid was'replaced. No known environmental
impacts occurred as a result of the spill.

III. Notification
A statement will be printed on the March 2024 utility bill mailed to City sewer users stating
where to get a copy of the Wastewater Performance Annual Report. The report will also be
posted on the City of Washington's website.
Utility bill notice for March 2024 bills:
Copies of Washington's Wastewater Performance Report for 2023 are available on the
City's website or by calling 252-975-9310.
IV. Certification
I Certify under penalty of law that this report is complete and accurate to the best of my
knowledge. I further certify that this report has been made available to the users or
customers of the named system and that those users have been notified of its availability.
�- 2 aL4-�,?
Lonnie Woolard Date
Water Resources Superintendent
City of Washington
Michael Mitchell Date
Water & Sewer Supervisor
City of Washington

Wastewater Collection Report
During 2023 the Wastewater Collection Division responded to the following complaint calls:
139 — Sewer tap stoppages
14 — Mainline stoppage
110 — Customer sewer complaint calls
249 - Total sewer complaint calls
The City of Washington Wastewater Collection Division provides routine sewer maintenance.
We routinely clean sewers as a preventive step to reduce the number of stoppages. In 2023, we
performed routine maintenance on 55 sewer taps. We cleaned and flushed a total of 4.93 miles
of sewer mains and installed 2 cleanout on taps.
The Wastewater Collection Division made 15 repairs to the sewer system in 2023. These repairs
range from cleanouts to mainline repairs.
The Wastewater Collection Division inspected the outfall line right of way twice and mowed the
outfall line during 2023. The Division also inspected all high -priority lines monthly during 2023.

Effluent Data
Isw����ai _ Il- - k.. 7fl74
Parameter
Flow
Residual
Chlorine
BOD
Ammonda
Nitrogen
Total
Nitrogen
TOW
Phosphorus
Total
Suspnded
ReaMw
Dissolved
OxyVa
Fecal
Coatorm
Turbld
Settleable
Matter
Codmi m
Chromium
Nickel
Cyanide
Lead
ZINC
Sawn
Amer*
Merc
8elenkae
Mo emet
COD
Acute
Tozk
unks
MGD
MPN
NTU
MIL
*Arth
Unbs
PtF
A r4h
A r4h
A Nh
A nth
A Ah
A nth
A mh
A roh
A nth
A mth
A r#tt
A nth
A Nh
A nth
A Nh
A uxh
A nth
A uxh
A nitu
A nth
A ntlt
A rttll
Res
A Nh
A rddrJamm
2.36W
10
<2
0.00
OAS
0.53
<2.5
9.1
1.0
am
<0.1
<t
<5
<10
<6
<6
30
<6
<6
<1
<10
<10
7A - 7.8
18
Februa
2.0631
11
<2
0.05
1.64
0."
<2.5
6A
1.0
am
<0.1
<t
<5
<10
<6
<5
29
46
46
41
<10
<10
7.3.7.0
17
Paas
Marsh
2-TW
<10
42
0.04
125
0.60
<2.5
5.9
1.0
0.23
40.1
41
45
<10
46
<6
42
29
45
<5
41
<10
<10
7A-7A
11
April
2A616
12
42
0.03
1."
0.03
<2A
8.5
1.0
020
40.1
Cl
46
<10
<6
<6
42
23
0
<6
Cl
<10
410
7.3 - 7.7
a
may
2.3226
13
42
0.03
0.97
OAS
0.5
SA
2.1
0.17
40.1
<1
11
24
46
46
<2
39
46
<6
41
<10
<10
7.8 - 7A
12
Pau
Jut»
22050
14
<2
0.04
126
0.70
r2.5
8.1
1.1
0.15
<9.1
<1
45
<10
45
<5
<2
20
45
<6
41
<19
<10
7.7.7.8
a
July
22494
1s
<2
0.03
133
0.69
<2A
7.5
1.0
0.19
40.1
Cl
45
<10
45
<5
42
23
0
<6
41
<10
CIO
7.0-7A
15
August
2.1S96
t0
42
0A3
2.97
0.63
<2A
7A
to
021
<0.1
Cl
<s
<10
45
<6
2
20
45
45
41
<10
<10
7.6-7.9
17
Pass
September
2-W4
13
<2
OAS
3,43
0A6
<xA
7.7
1.3
0.17
<0.1
41
45
<10
45
<6
<2
23
0
46
41
<10
410
7A - 7.9
17
October
2.1521
14
<2
0.03
3.52
0.70
92.5
8A
1.0
0.19
40.1
<1
45
<10
45
45
42
23
46
<6
Cl
<10
CIO
7.7.7.8
10
November
2.0790
<10
12
0.06
1.61
0.00
42.5
9.0
1.0
0.13
40.1
<1
45
CIO
45
<5
<2
37
<6
<5
Cl
410
<t0
7A-7.8
a
Pass
December
2.5249
12
<2
0.05
1.19
OAT
dA
9A
1.0
021
<0.1
<t
45
<10
45
<6
<2
33
45
<6
Cl
<10
410
72.7.9
14
A ear
23719
I
<2
0.04
1.80
0.04
42.5
aA
121
020
<O.1
41
45
<10
0
46
42
28
45
<6
<t
-T
<10
410
72-7.9
13
NPDE8
Permit Units
3.65
17
13.1
I
1.0
30
5.0 or
I greater
200
T
�7
May t:r a micKei values were rerun ana nignest value reportea
Cr #1-11 02 - 9.5 mglL Ni #1- 24 02 - 22 nig/L
Influent Data
Inwrrnr - rinrnrnhn► 9fl9Z
Parameter
SOD
AmmoeYa
N en
Total
N en
Total
Phosphorus
Total
Suspended
Residua
Turbidity
Settleable
Mahar
Cadmium
ChromiumNickel
ankle
Lead
Co
Zh+c
8awr
Anenlc
Marc
8elenbm
Molybdenum
COD
uttlts
NTU
M11L
u
A mAlr
A »ffi
A nth
A ntfi
A rgtt
A r9h
A nth
A nthral+
A rgtt
A ttttl
A tWt
A rdh
A t4h
A fRh
A mitt
A r4h
A rah
Res
A mh
January
1"
21.6
27A0
4A0
133
$7.3
ale
<1
c5
<6
20
80
<s
<6
<02
<10
<10
72.7.3
274
Februa
127
20.1
24.34
3.30
119
49.1
8.1
<10<6
<6
17
105
<5
<6
40.2
<1O
410
7.0-7A
317
March
195
232
32.00
4.70
277
80.0
12.2
<10
<9
c6
78
381
c6
<6
<0.2
<10
<10
7.0-7A
SW
April
13S
19.7
29.00
3.94
143
47.6
82
<10
<5
<5
2a
118
<5
<5
<O2
<10
410
7.0.7.3
389
Ma
170
22.7
27.92
4.2a
156
64.0
9.1
<12
<6
<5
30
102
<5
<d
<02
410
<10
7.0-72
343
Jura
133
20A
36=
5.15
121
67.9
62
<10
<5
<s
45
171
CS
<5
<02
410
<10
7.0.72
443
J
139
23.1
35.34
4A7
148
642
82
<1
6
<6
33
117
<6
<5
<02
<10
<10
7.0-73
343
A ust
169
24.8
29.02
4A0
ISO
63.9
9.0
<10
<5
48
25
129
<5
<6
0.2
410
<t0
7.0-7.3
357
September
1 143
19.8
1 29.19
4.03
143
47.1
10.7
41
11
14
46
46
21
78
<5
0
<02
410
<10
7.1.7.3
312
October
101
24A
1 29.74
4.50
183
68A
10.6
<1
<5
<t0
0
496
38
122
45
c6
<0.2
<1O
410
72 - 7.3
347
November
tag
23.9
3438
4AS
132
64.7
12.0
<1
c6
<10
46
46
25
94
<5
45
402
<10
<10
72-7.3
300
December
146
20.5
35.67
3.77
131
40A
103
<1
46
410
<5
46
32
103
45
45
<02
<10
<t0
7.1-7.3
402
AWN-
152
22.5
30.95
431
160
60.9
9A
<1
6
410
<6
45
33
134
<5
<5
402
410
<10
7.0.7.4
368
NPDES
Permlt Lknaa
May ter a, NlcKel values were rerun ana mgnest valtme reponou
Cr #1- <5 02 - 5 mglL N) 01-12 02 -12 mg1L