NC0023884_Revised Long Term Monitoring Plan_20210216

ii)
February 8, 2021
REcov
Mr. Michael Montebello ED
NC Division of Water Resources FEB j 6 2021
Water Quality Permitting NCD
Municipal Unit-Permitting EQ/DW
1617 Mail Service Center RiNPDES
Raleigh,NC 27699-1617
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 1—Updated language to include that Uncontrollables are composite and/or grab
samples.
• Page 2--Updated industry name changes for Agility Fuel Solutions,Nouryon,
Continental Structural Plastics, Thorneburg Hosiery Mills and Supply One.
• Page 4--Updated "Pollutant of Concern(POC): Reason for Inclusion"table under
SIU Permit Limit column to include Arsenic and Chloride parameters.
• Page 4--Updated "Parameter Detection Limits"table.
• Page 5—Marked "X" for Mo and Se sampling in Aeration Basin under"Sampling
Plan"table; Marked"X" for 0 & G under SIU's in the "Sampling Plan"table; and
added Chloride, Sulfate, Phenol, Barium, Styrene, Aluminum, and Boron under SIU's
in the "Sampling Plan"table.
Please contact me at [phone] if you have any questions regarding Salisbury's LTMP.
Si cerely,
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 R c
Revised February 8, 2021 FEB 16 2021 4d
IVCDEQ/pwR/NP
DES
Sampling Points and Frequencies:
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 —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- Discharge to Grant& Town Creek Treatment Train
AFS-Agility Fuel Solutions(Town)
CSP—CSP Composites,LLC-Continental Structural Plastics(Grant)
FRE—Freirich Foods(Grant)
HBD—HBD, Industries(Town)
HIT—Hitachi Metals(Grant)
IP —Innospec Performance Chemicals(Grant)nt)
NRN—Nouryon Surface Chemistry(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 Sampling Points and Frequency
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
Grant Aeration GAB Effluent from aeration Grab GAB samples
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 Sampling Points and Frequency
Sample Location Sample ID I, 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.
Page 3

Pollutants of Concern (POC): Reason for Inclusion
POC List NPDES 503 Sludge SIU 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/I Pollutant *DL,
pg/I
Mercury .0002 **Mercury .001
(method 245.1) (method 1631E)
Nitrite+Nitrate 0.3 Arsenic 2.0
**Oil&Grease 5 Cadmium 0.50
BOD 2 Lead 2.0
COD 10 Silver 1.0
TSS 2.5 Chromium 5
TKN 1 Copper 2.0
NH3-N 0.1 Molybdenum 10
Total Phosphorus 0.01 Nickel 5
%Solids 25 Zinc 10
Chloride Selenium 5.0
Sulfate **Total Cyanide 10.0
**Phenol **Styrene 10.0
Aluminum Barium
Antimony Boron
* 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 Cyanid Oil&Grease,and Mercury(1631 E method),
Phenol and Styrene which are grabs.
Page 4

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