NC0023884_LTMP_20240213

February 8, 2024
Mr. Michael Montebello
NC Division of Water Resources
Water Quality Permitting
Municipal Unit -Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
Sa/isbury�R�wan
RECEIVED
ELB 12 2JL4
NCDEQ/DWR/NPDES
Subject: City of Salisbury Revised Long Term Monitoring Plan
Dear Mr. Montebello:
The City of Salisbury is submitting a revised Long Term Monitoring Plan (LTMP) with the
following revision:
• Page 2—Dropped Hitachi Metals (HIT) Industry from list of industries discharging to
POTW. (Facility now closed).
• Page 5—Updated parameter Oil & Grease with an "X" as a sampled parameter for
our Uncontrollable Sites.
Please contact me at [phone] if you have any questions regarding Salisbury's LTMP.
Si cerely,
.4 V AW"
Jeffery A Greer
Pretreatment Program Coordinator
Enclosure: Revised Salisbury LTMP
cc: PT Files
1915 Grubb Ferry Road Salisbury -Rowan Utilities Telephone [phone]
Salisbury, NC 28144-1248 Environmental Services Division Fax [phone]

City of Salisbury
City of Salisbury WWTP
NPDES NC0023884
Long Term Monitoring Plan
Revised February 8, 2024
Sampling Points and Frequencies:
RECEIVED
FEB 1-2 202A
NCDE.QIDWRINPDES
Salisbury has a unique situation in that we have two Treatment Trains at two separate physical locations
that the SIU's discharge into. The chlorinated effluent from the Town Creek Treatment Train (TE) is
combined with the Grant Creek Treatment Train chlorinated effluent (GE). The combined chlorinated
effluents (YE) join together on the Grant Creek property are dechlorinated, then flow through cascade
aeration, and then discharge into the Yadkin River. Although not permitted as separate WWTPs, Town
Creek and Grant Creek Treatment Trains will be treated as separate WWTPs in the LTMP with data from
both sites used to determine pollutant removal efficiencies and plant inhibition thresholds.
All SIUs and Locals are monitored per IU Permit requirements and all POC's once per year. The City
uses a Yearly Monitoring Plan. The Plan is followed as closely as possible weather permitting. If an SIU
is not monitored in the month indicated, it is monitored as soon as possible.
Uncontrollables are composite and/or grab samples at points in the collection system that serves
residential, commercial (including dentists and other medical), and any unpermitted non-SIUs.
Uncontrollable sampling, though not required, will be monitored annually.
Salisbury will use the actual sludge that is disposed of as our sludge sampling requirement per our sludge
disposal permit (WQ0001956) and EPA 503 regs.
Grant Treatment Train
GR — Grant Influent (sampled post preliminary processes, prior to residual side streams and primary
process).
GE — Grant Effluent (sampled at end of chlorine contact basin)
GAB — Grant Aeration Basin (sampled prior to influent of secondary clarification, due to accessibility)
GS - Grant Sludge to Disposal (digester sludge to disposal, sludge taken at end of belt press)
Town Treatment Train
TR — Town Influent (sampled post preliminary processes, prior to residual side streams)
TE — Town Effluent (sampled at end of chlorine contact basin)
TAB 1 — Town Aeration Basin # 1 (sampled at effluent end of aeration basin)
TAB2 — Town Aeration Basin#2 (sampled at effluent end of aeration basin)
TS - Town Sludge to Disposal ( digester sludge to disposal, sludge taken at end of belt press)
Final Effluent (Yadkin Effluent)
YE — Grant and Town Creek Treatment Trains chlorinated combined effluents are dechlorinated then
composite sampled prior to the cascade.

Industries - Discharee to Grant & Town Creek Treatment Train
FRE — Freirich Foods (Grant)
HXA — Hexagon Agility (Town)
IPC — Innospec Performance Chemicals (Grant)
NRN — Nouryon Surface Chemistry (Grant)
TJN — Teijin automotive Technologies (Grant)
THR — Thorneburg Hosiery Mills, Inc. (Town)
Local SIUs and Uncontrollables
PCA — Packing Corporation of America (Local permit)
SPO — SupplyOne (Local permit)
CHG- China Grove (Satellite -uncontrollable)
LDS- Landis (Satellite -uncontrollable)
GRQ- Granite Quarry (Satellite -uncontrollable)
FAI- Faith (Satellite -uncontrollable)
ESP -East Spencer (Satellite -uncontrollable)
SPR-Spencer (Satellite -uncontrollable)
Grant Creek Treatment
Train Sam ling Points and Fre ncy
Sample Location
Sample ID
Description
Sample Type
Sample Frequency
Grant Influent
GR
Influent from collection
24 Hr Composite
system, sampled post
GR and GE sampled
preliminary processes,
quarterly on a
prior to residual side
workday and per
streams and primary
NPDES requirement
process
GAB samples
Grant Aeration
GAB
Effluent from aeration
Grab
Basin
basin, sampled prior to
collected once every
influent of secondary
6 months.
clarification, due to
accessibility
Grant Effluent
GE
Effluent from treatment
24 Hr Composite
train, sampled at end of
chlorine contact basin
Grant Sludge to
GS
Digester sludge to
Grab
GS samples collected
Disposal
disposal, sludge taken at
per sludge permit
end of belt press
WQ0001956 and 503
regulations
Page 2

Town Creek Treatment Train Sam ling Points and Fre uenc
Sample Location
Sample ID
Description
Sample Type
Sample Frequency
Town Influent
TR
Influent from collection
24 Hr Composite
system, sampled post
TR and TE sampled
preliminary processes,
quarterly on a
prior to residual side
workday and per
streams
NPDES requirement
Town Aeration
TAB 1 &
Effluent from aeration
Grab
Basin
TAB 2
basins, sampled
TAB 1 & 2 samples
separately at the effluent
collected once every
end of each aeration
6 months.
basin
Town Effluent
TE
Effluent from treatment
24 Hr Composite
train, sampled at end of
chlorine contact basin
Town Sludge to
TS
Digester sludge to
Grab
TS samples collected
Disposal
disposal, sludge taken at
per sludge permit
end of belt press
WQ0001956 and 503
regulations
City of Salisbury WWTP Sampling Point and Frequency
Code Name Description Type Frequency
YE
Combined
Grant and Town Creek
24 hr composite
sampled quarterly on
Effluent
Treatment
a workday and per
Trains dechlorinated
NPDES requirement
combined effluents
Note: Dechlorinated combined effluent YE (TE + GE = YE) will be analyzed for each of the POCs but
will not be used in the calculation of pollutant removal efficiencies, plant inhibition thresholds or in the
calculation of uncontrollable loadings.
Pollutants of Concern (POC): Reason for Inclusion
Page 3

POC List
NPDES
503 Sludge
SILT Permit Limit
Flow
X
X
X
BOD
X
X
COD
X
TSS
X
X
NH3-N
X
X
NO2+NO3
X
TKN
X
X
Total Phosphorus
X
X
Total Cyanide
X
X
Oil & Grease
X
% Solids
X
As
X
X
Cd
X
X
Cr
X
Cu
X
X
Pb
X
X
Hg
X
Mo
X
Ni
X
X
Se
X
Ag
X
X
Zn
X
X
Chloride
X
Parameter Detection Limits:
Pollutant
*DL, mg/l
Pollutant
*DL,
/I
Mercury
method 245.1
.0002
**Mercury
method 1631 E
.001
Nitrite + Nitrate
0.5
Arsenic
2.0
**Oil & Grease
10
Cadmium
0.50
BOD
2
Lead
2.0
COD
20
Silver
1.0
TSS
2.5
Chromium
5
TKN
1.5
Copper
2.0
NH3-N
0.5
Molybdenum
10
Total Phosphorus
0.2
Nickel
2.0
% Solids
25
Zinc
10
Chloride
1.0
Selenium
1.0
Sulfate
2.0
**Total Cyanide
5.0
**Phenol
.010
**Styrene
1.0
Aluminum
.050
Barium
10
Antimony
.010
Boron
50
* Detection Limits are typical but may vary with changes in sample matrix or analytical conditions.
**All POCs are 24 hour composites with the exception of Cyanide, Oil & Grease, and Mercury (1631 E method),
Phenol and Styrene which are grabs.
Sampling Plan
Page 4

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