NC0020656_Permit (Issuance)_20091015

HPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0020656
Laurinburg / Leith Creek WWTP
Document Type: :
`Permit Issuance';
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
October 15, 2009
This document is printed on reuse paper - igiore any
content on the re'rerse side

-.ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
October 15, 2009
Mr. Edward F. Burchins, City Manager
City of Laurinburg
P. O. Box 249
Laurinburg, North Carolina 28353
Subject: Issuance of NPDES Permit NC0020656
Leith Creek WWTP
Scotland County
Dear Mr. Burchins:
The Division of Water Quality (DWQ or the Division) personnel have reviewed and approved your application
for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES discharge permit. It is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 10, 2007, or
as subsequently amended.
This permit includes the following changes in the effluent limitations and monitoring page from the draft permit
sent to you on August 26, 2009:
1. Mercury monitoring in the effluent was changed. A monthly average was added to conform to EPA
requirements. In addition, Method 1631E is specified, and the sample type was corrected from
composite to grab.
2. The incorrect numerical footnotes regarding instream sampling were corrected. Additionally, an
incorrect footnote on Dissolved Oxygen was deleted.
3. The requirement for semi-annual monitoring for mercury in sludge was deleted. Total mercury
monitoring of sludge is already done quarterly under non -discharge Permit No. WQ0002526.
If any parts, measurement frequencies, or sampling requirements contained in this permit are unacceptable,
you have the right to an adjudicatory hearing upon written request within thirty (30) days after receiving this
letter. Your request must take the form of a written petition conforming to Chapter 150B of the North Carolina
General Statutes, and must be filed with the office of Administrative Hearings, 6714 Mail Service Center,
Raleigh, North Carolina 27699-6714. Unless such demand is made, this permit remains final and binding.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, Nbrth Carolina 27604
Phone: [phone] FAX: [phone] \ Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity t Affirmative Action Employer
horthCarolina
atura!!y •

This permit is not transferable except after notifying the Division of Water Quality. The Division may modify and
re -issue, or revoke this permit. Please notice that this permit does not affect your legal obligation to obtain other
permits required by the Division of Water Quality, the Division of Land Resources, the Coastal Area
Management Act, or other federal or local governments.
If you have questions, or if we can be of further service, please contact Gil Vinzani at [qil.vinzani @ ncdenr.govl or
call [phone].
fj( Coleen H. Sullins
Enclosure: NPDES Permit FINAL NC0020656
cc: Fayetteville Regional Office/Surface Water Protection Section
NPDES Permit File
Central Files
Aquatic Toxicology Unit, Attention: Susie Meadows (E-mail copy)
EPA Region 4, Attention: Marshall Hyatt
1617 Mail Service Center. Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] \ Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An tqual Opportunity 1 Alfirmarwe Action Employer
One
NorthCarolina
Naturally

Permit No. NC0020656
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
City of Laurinburg
is hereby authorized to discharge wastewater from a facility located at
Leith Creek WWTP
620 Hall Street
Laurinburg, North Carolina
Scotland County
to receiving waters designated as Big Shoe Heel Creek in the Lumber River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
The permit shall become effective November 1, 2009.
This permit and the authorization to discharge shall expire at midnight on August 31, 2014.
Signed this day October 15, 2009
i Cofieen Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit No. NC0020656

SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
City of Laurinburg
is hereby authorized to:
1. Continue to operate the existing 4.0 MGD wastewater treatment facility located at Leith Creek
WWTP, 620 Hall Street, Laurinburg, Scotland County, and consisting the following treatment
components:
■ Mechanical bar screen
• Mechanical grit removal
• Influent flow monitoring
• Aerated equalization basin
• Influent pump station
• Flow splitter box
• Two (2) 1-MGD extended aeration basins with secondary clarification
• 2 MGD oxidation ditch with secondary. clarification
■ Chlorination
• Effluent flow measurement
■ Two aerobic digesters
• Sludge drying beds
• Effluent force main
• Cascade aeration
2. Discharge treated wastewater from said treatment works (via Outfall 001) into Big Shoe Heel Creek,
a Class C Swamp water in the Lumber River Basin, at the location specified on the attached map.

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State Grid/Quad:
Drainage Basin:
Receiving Stream:
Stream Class:
City of Laurinburg
Leith Creek WWTP
H21 S W/Laurinburg Latitude: 34° 45' 2.9" N
Lumber River Longitude: 79° 23' 12.3" W
Big Shoe Heel Creek •
C NSW Sub -Basin: 03-07-55
7
i . ,titnr.,;.c.r,
NPDES Permit No. NC0020656
Scotland County

Permit NC0020656
A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittee is authorized to
discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the
Permittee as specified below:
PARAMETER.
F
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly '
Average.
Weekly
Average
Daily
- Maximum
Measurement
Frequency`
Sample '
' Type
Sample Location/
Flow
4.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 2
20.0 mg/L
30.0 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent & Effluent
NH3—N
5.0 mg/L
15.0 mg/L
Daily
Composite
Effluent
Total Residual Chlorine3
28 pg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Dissolved Oxygen
Daily effluent dissolved oxygen
concentration shall not be less than
5.0 mg/I.
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Conductivity
Daily
Grab
Effluent
pH
pH shall not be less than 6.0 standard
units nor greater than 9.0 standard units
Daily
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Chronic Toxicity's
Quarterly
Composite
Effluent
Total Copper
Monthly
Composite
Effluent
Total Zinc
Monthly
Composite
Effluent
Total Mercury
(Method 1631 E)
39ng/L
39ng/L
Monthly
Grab
Effluent
Dissolved Oxygen
3/Week5
Grab
U, D1, D2
Fecal Coliform
3/Week5
Grab
U, D1, D2
Temperature
3/Week5
Grab
U, D1, D2
Conductivity
3/Week5
Grab
U, D1, D2
Annual Pollutant Scan
See A (3)
Notes:
1. U- Upstream at least 100-ft above outfall, D1- Downstream at NCSR 1612, D2- Downstream at NCSR 1108, S-
Sludge.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
3. The Division received EPA approval to allow a 50 pg/L TRC compliance level. You must report actual results on
DMR submittals, but for compliance purposes, all TRC valued below 50 pg/L will be deemed compliant.
4. Chronic Toxicity (Ceriodaphnia) at 31%; February, May, August, November [see A (2)].
5. Upstream/downstream samples shall be collected 3/Week for June -September and 1/Week for October -May.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0020656
A (2) CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 31 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions. The tests will be performed during the months of
February, May, August, and November, Effluent sampling for this testing shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the
highest concentration having no detectable impairment of reproduction or survival and the lowest
concentration that does have a detectable impairment of reproduction or survival. The definition of
"detectable impairment," collection methods, exposure regimes, and further statistical methods are
specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -
February 1998) or 'subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter
code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3
(original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Environmental Sciences Section at the address cited above. Should the permittee fail to monitor during
a month in which toxicity monitoring is required, monitoring will be required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation and reporting of the data submitted on the DMR and all
AT Forms submitted..
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.

Permit NC0020656
A (3) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached
table (using a sufficiently sensitive detection level in accordance with 40 CFR Part 136). Samples shall
represent seasonal variations. Unless otherwise indicated, metals shall be analyzed as "total metals".
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (Method 1631 E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1 ,2-dichloroethylene
1 ,1-dichloroethylene
1 ,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4, 6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- A MR-PPA1 or in a form approved by the
Director within 90 days of sampling. The report shall be submitted to the following address: Division of
Water Quality, Water Quality Section, Central Files, 1617 Mail Service Center, Raleigh, North Carolina
27699-1617. This submittal must also be included with the next permit renewal application form.

Vinzani, Gil
From: [e-mail]
Sent: Thursday, September 10, 2009 11:18 AM
To: Vinzani, Gil
Subject: RE: comments re NC0020656, Laurinburg Leith Creek WWTP
thanks for making those changes. EPA has no comments on this permit.

Vinzani, Gil
From: Vinzani, Gil
Sent: Thursday, September 10, 2009 11:16 AM
To:'[e-mail]'
Subject: RE: comments re NC0020656, Laurinburg Leith Creek WWTP
Hi, Marshall:
Yes, it's great to have another set of eyes check the limits page, especially footnotes:
1. Noted. I will delete that footnote.
2. a. Yes, I will note the method on the Table, and change composite to grab. "Composite"
was a carryover mistake from the last permit. (You may note that the PPA scan for mercury
listed in A(3) did reference method 1631E)
b. Ah yes, we've been discussing that among ourselves. In this case, I will add a
monthly average equal to the weekly average.
3. Footnote 7 will be changed to footnote 6. It refers to the frequency of
upstream/downstream sampling.
Thanks again.
Gil Vinzani, Engineer
Eastern NPDES Program
919-807-6395
E-mail correspondence to and from this address may be subject to the NC Public Records Act
Original Message
From: [e-mail][mailto:[e-mail]]
Sent: Thursday, September 10, 2009 10:37 AM
To: [e-mail]
Subject: comments re NC0020656, Laurinburg Leith Creek WWTP
1. Footnote 4 for dissolved oxygen should be deleted. It refers to
chronic WET.
2. a. Mercury monitoring should be via grab sample using Method 1631E.
b. Use of a weekly average limit only is not consistent with the
NPDES regs. Recommend either setting the monthly avg equal to the
weekly avg or adding a daily max limit .
3. Footnote 7 is missing.
let me know your response. thanks.
Marshall
1

AFFIDAVIT OF PUBLICATION
NORTH CAROLINA
Cumberland County
Public Notice
North Carolina
Environmental Management
Commission/NTDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
Notice of Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environ -
mental Management Com -
mission proposes to issue a
NPDES wastewater dis -
charge permit to the
person(s) listed below.
Written comments regarding
the proposed permit will be
accepted until 30 days after
the publish date of this no-
tice. The Director of the NC
Division of Water Quality
(DWQ) may hold a public
hearing should there be a
significant degree of public
interest Please mail com -
ments and/or information re-
quests to DWQ at the above
address. Interested persons
may visit the DWQ at 512 N.
Salisbury Strut, Raleigh. NC
to review information on file.
Additional information on
NPDES permits and this no -
tice may be found on our
wtyebrsgite: www.ncwaterquali -
ty.org by calling (919)
gCity of Laurinburg requested
renewal of permit
NC0021661 for Pilkmgton
North American WWI? in
Scotland County; this per -
mitted discharge Is heated
wastewater to an unnamed
tributary to Shoe Heel Creek,
Lumber River Basin.
The City of Laurinburg ap
plied for renewal of NPDES
Permit NC0020656 for the
discharge of treated waste -
water into the Big Shoe Heel
Creek. This discharge may
affect future allocations in
this poruon of the Lumber
River -Basin.
Town of Rowland requested
renewal of permit
NC0069612 for Rowland
WWTP in Robeson County;
this permitted discharge is
treated wastewater to Big
Shoe Heel Creek, Lumber
River Basin.
Town of Marlon requested
renewal of permit
NC0027120 for Manton
WWTP in Robeson County:
this permitted discharge is
treated wastewater to Shoe
Heel Creek, Lumber River
Basin.
Notice of Intent to Issue a
NPDES Wastew•aterPermit
1645495
Before the undersigned, a Notary Public of said County and state, duly
commissioned and authorized to administer oaths, affirmations, etc.,
personally appeared. CINDY L. OROZCO -
Who, being duly sworn or affirmed, according to law, doth depose and say
that he/she is LEGAL SECRETARY
of THE FAYETTEVILLE PUBLISHING COMPANY, a corporation organized
and doing business under the Laws of the State of North Carolina, and
publishing a newspaper known as the FAYETTEVILLE OBSERVER, in the
City of Fayetteville, County and State aforesaid, and that as such he/she
makes this affidavit; that he/she is familiar with the books, files and
business of said Corporation and by reference to the files of said publication
the attached advertisement of CL Legal Line
PUBLIC NOTICE NC ENVIRONMENTAL MANAGEME
of NC DIVISION OF WATER QUALITY
was inserted in the aforesaid newspaper in space, and on dates as follows:
8/29/2009
and at the time of such publication The Fayetteville Observer was a
newspaper meeting all the requirements and qualifications prescribed by
Sec. No. 1-597 G.S. of N.C.
The above is correctly copied from the books and files of the aforesaid
corporation and publication.
LEGAL SECRETARY
Title
Cumberland County, North Carolina
Sworn or affirmed to, and subscribed before me, this 3 day
of September, A.D., 2009.
In Testimony Whereof, I have hereunto set my hand and affixed my
official seal, the d.y .nd year foresaid.
irsten E. Speer, Notary Pu'-lic
My commission expires 12th day of September, 2011. o,><>ts91rrrr//,
•`�ckSTEN,
MAIL TO: NC DIVISION OF WATER QUALITY - n No tie:,
V
1617 MAIL SERVICE CENTER - s,
RALEIGH, NC 27699 ; �`s; JJ'�; .; . C
'',''� CI I A ae�i+�``�
0001645495

NCDENR / DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Laurinburg
NPDES No. NC0020656
wkiWrataaig
Fac•
ilit
(1) Facility Name:
Leith Creek WWTP
(2) Permitted Flow:
4.0 MGD
(6) County:
Scotland
(3) Facility Class:
IV
(7) Regional Office:
Fayetteville
(4) Facility Status:
Existing
(8) USGS Topo Quad:
H21 SW
(Laurinburg NC)
(5) Permit Status:
Renewal
[ream?C ' ate trsties
(1) Receiving Stream:
Big Shoe Heel Creek
(2) Subbasin:
030705
(Lumber Basin)
(8) Drainage Area (mi2):
83.00
(3) Index No.:
(4) Stream
Classification:
14-34
C Swamp
(9) Summer 7010 (cfs)
(10) Winter 7Q10 (cfs):
13.8
24
(5) 303(d) Listed:
No
(11) 30Q2 (cfs):
35
95.00
(12) Average Flow (cfs):
(13) IWC (%):
31
Summary
This facility is a major municipal treatment plant operating in Scotland County. It serves 17,242
people in the City of Laurinburg. The facility has permitted flow of 4.0 MGD, discharging into
Big Shoe Heel Creek. There is a small industrial component to the discharge, but no
pretreatment program is required. Residuals are land applied under permit WQ0002526.
DMR Review
A review of the DMRs was done for the period from January 2005 until June 2009. Recent
flows (since 1/1/08) averaged 2.54 MGD, or 63.5% of design flow. Effluent BOD the past year
averaged 4.28 mg/L. Monthly averages for selected parameters are included in the regional
staff report.
Compliance Review
BIMS shows six limits violations during this period: two for suspended solids in 2005, two for pH
in 2006, one for fecal coliform in 2005, and one monthly exceedance for flow (4.04 MGD) in
2008.

NPDES PERMIT FACT SHEET City of Laurinburg
Page 2 NPDES No. NC0020656
Other notable events include an overflow at the treatment plant on August 1, 2005, for which an
NOV was written, and a plan of action drafted by the Town to prevent future occurrences.
Additionally, during a site visit by staff in February of 2009, a discolored effluent stream with
solids was observed at the ouffall. Additionally, on February 18, 2009, a sludge spill occurred
near the small sludge holding tank. This spill was contained on site (see facility staff report,
letter from Dale Lopez to WWTP Director Ellis).
Reasonable Potential Analysis
• Both zinc and copper showed reasonable potential to exceed the action level standard.
As action level parameters, they will continue to be monitored monthly, as per the
existing permit.
• Effluent total Fluoride did not show reasonable potential to exceed the standard.
• Mercury showed reasonable potential (max predicted of 95 ng/L)
Toxicity Testing
Type of Toxicity Test:
Existing Limit:
Monitoring Schedule:
Chronic P/F (Ceriodaphnia).
Chronic P/F 31 % concentration
February, May, August, and November
The facility failed its toxicity test in November 2006 and also failed the follow-up test in.
December 2006. The Division's Aquatic Toxicology Unit indicated that, since the Town has
passed all their toxicity tests since then, there is no reason to consider a limit for copper or zinc.
Proposed Changes
1. Add a mercury limit of 39 pg/L. Similar to the last cycle, the statistical analysis of the
mercury effluent data showed reasonable potential to exceed water quality standard.
Therefore, a limit will be added to the permit, with monthly monitoring required. Again,
this data may be reevaluated during the next renewal period.
2. Delete the monitoring requirement for fluoride, due to lack of reasonable potential.
3. Add the standard footnote for TRC evaluation. This acknowledges the 50 pg/L
quantitation limit.
The existing monitoring frequency for the action level parameters of zinc and copper remains
unchanged, based on the recommendation of the Aquatic Toxicity Unit.
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: August 26, 2009
Permit Scheduled to Issue: October 1, 2009
State Contact
If you have any questions on any of the above information or on the attached permit, please
contact Gil Vinzani at [phone].
w
ktf (ty..„
Page 2
Version: August 25, 2009

IWC Calculations
Facility: Laurinburg WWTP
NC0020656
Prepared By: GTV
Enter Design Flow (MGD):
Enter s7Q10 (cfs):
Enter w7Q10 (cfs):
4
13.8
24
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
Upstream Bkgd (ug/I)
IWC (%)
Allowable Conc. (ug/I)
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
13.8
4
6.2
17.0
0
31.00
55
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/I)
w7Q10 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
3.23 Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mg/I)
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/1
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/I (winter)
5. BAT for Major Municipals: 1 mg/I (year-round)
13.8
4
6.2
1.0
0.22
31.00
2.7
24
4
6.2
1.8
0.22
20.53
7.9
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
NPDES Server/Current Versions/WLA; TB 1/16/2009

&u1 of Oturiouvi
OFFICE OF THE TREATMENT PLANTS DIRECTOR
March 18, 2009
Mrs. Dina Sprinkle
NCDENR / Water Quality / Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
All-Ameilca City
RECEIVE20031B"
Subject: Renewal Application Packet DENR - WATER QUALITY
Permit# NC0020656
Leith Creek Wastewater Treatment Ph& DINT SOURCE BRANCH
Dear Mrs. Sprinkle:
We have enclosed the additional fathead minnow toxicity test needed for the permit
renewal requirements and a schematic of the wastewater flow and process for your
review.
Along with the above mentioned information we are sending a narrative of our treatment
process.
The City of Laurinburg's collection system consists of 34 pump stations located
throughout the system. There are 123.7 miles of gravity sewers and 24 miles of force
mains. Our Leith Creek Plant consist of two types of treatment, one extended aeration
plant, consisting of 2 aeration basins, 2 clarifiers, 2 chlorine contact chambers and one
return sludge pump station with 3 pumps, total capacity 2.0 million gallons per day
(MGD)
The second plant is an oxidation ditch style with 1 clarifier, 1 chlorination point and 1
return sludge pump station with 3 dual speed pumps, total capacity 2.0 MGD, for a total
treatment capacity of 4.0 MGD. The facility has 2 aerobic digesters, (1) 150,000-gallon
tank and (1) 650,000-gallon tank with course air diffusers.
Sincerely,
LQ-kR
Robert A. Ellis
City of Laurinburg
Treatment Plants Director
Cc: Dale Lopez, Division of Water Quality
603 LAUCHW00D DRIVE • P.O. BOX 249 • LAURINBURG, N.C. 28353 0 PHONE: [phone] FAX: [phone]

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DIVISION OF WATER QUALITY
March 11, 2009
MEMORANDUM
TO: Dina Sprinkle
Point Source Branch
FROM: Dale Lopez, Environmental Specialist
THROUGH: Belinda S. Henson, Regional Supervisor Surface Wat Protectin Section, FRO
SUBJECT: Application for NPDES Permit NC0020656
Laurinburg (Leith Creek) Wastewater Treatment Plant
PO Box 249
Laurinburg, NC 28379
Scotland County
Please find enclosed a staff report and recommendations from the Fayetteville Regional
Office concerning the application for a new NPDES Permit.
If you have any questions or require any further information, please advise.
/DL
Enclosures

To: Permit and Engineering Unit
Water Quality Section
Attention: Dina Sprinkle
Date: March 11, 2009
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY: Scotland
Permit No.: NC0020656
PART 1— GENERAL INFORMATION
1. Facility and Address: Laurinburg (Leith Creek) Wastewater Treatment Plant
PO Box 249
Laurinburg, NC 28356
2. Date of Investigation: February 18, 2009
3. Report Prepared by: Dale Lopez, Environmental Specialist FRO
4. Person Contacted and Telephone Number:
Robert Ellis [phone]
5. Directions to Site:
From Fayetteville, travel on Hwy 95 South, pass through Lumberton, then turn right on
Exit 14 (Hwy 74). Turn right, then an immediate left onto Business Hwy 74. Travel
approximately two miles and turn left onto Hall Street, travel approximately one mile and
turn left onto E. Covington Street. Go straight onto Read Street. The Laurinburg Leith
Creek Wastewater Treatment Plant will be at the end of the street and on the left.
6. Discharge Point(s), List for all discharge points:
Latitude: 34°45'00" N Longitude: 79°27'45" W
Attach a U.S.G.S. map extract and indicate the treatment facility site and the discharge point on
the map.
U.S.G.S. Quad No.
U.S.G.S. Quad Name:

7. Site size and expansion area consistent with the application?
(Yes.
8. Topography (relationship to the flood plain):
9. Location of the nearest dwelling:
Not evaluated
'Not evaluated
10. Receiving stream or affected surface waters:
a. Classification:
'Lumber River Index Number 14-34 Classification C, Swl
b. River Basin No. Lumber River 03-07-55 and Sub basin No.:
1LUM55
c. Describe receiving stream features and the pertinent downstream uses:
The discharge from the Laurinburg wastewater treatment facility flows to Big
Shoe Heel Creek, at a point with a 7Q10 of 13.8 cfs flow (as according to the
Whole Effluent Toxicity Testing Self -Monitoring Summary --- see attachment).
It is classified as Class C, Sw waters, which promotes aquatic life propagation and
survival, fishing, wildlife, secondary recreation, and agriculture.
PART II - DISCRIPTION OF WASTES AND TREATMENT WORKS
Volume of wastewater to be permitted:
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Wastewater Treatment facility?
4.0 MGD
4.0 MGD
Actual treatment capacity of the current facility (current design capacity)?
4.0 MGDI
d. Please provide a description of the existing or substantially constructed
wastewater treatment facility:
The Laurinburg WWTP is a 4 MGD wastewater treatment facility consisting of
mechanical bar screen, mechanical grit removal, influent Parshall Flume and ultrasonic
flow monitoring device, aerated equalization basin (E.Q. basin), influent pump station
(overflow from the influent pump station goes to the E.Q. pump station, and then to a six
million gallon Equalization Basin with six floating aerators), flow splitter box divides
flow equally between dual 1-MGD extended aeration basins (both aeration basins with
secondary clarification), a 2-MGD oxidation ditch with secondary clarification, dual
chlorine contact basin using bleach disinfectant, dechlorination, effluent force main
pumps treated wastewater approximately one mile to the effluent Parshall Flume
(equipped with ultrasonic flow monitoring device), cascade step aeration, and discharge
of treated wastewater into Big Shoe Heel Creek (Lumber River Basin) Sludge is treated
in two aerobic digesters and sludge drying beds, then land applied at the Laurinburg
Maxton Airport Commission land application site with Land Application of Residuals
Permit Number WQ0002526.
e. Possible toxic impacts to the surface waters:

2. Residuals handling and utilizing/disposal scheme:
a. If residuals are being land applied, please specify the DWQ Permit No.
WQ0002526
Residual Contractor:
Telephone:
b. Residual stabilization:
c. Landfill:
e.
Other disposal/utilization scheme (specify):
IN/AI
3. Treatment plant classification (attach completed rating sheet):
4. Alternative Analysis Evaluation:
Has the facility evaluated all of the non -discharge options available?
regional perspective for each of the options that were evaluated.
Connection to Regional Sewer System:
Land Application:
Water Reuse:
none evaluated
none evaluated
none evaluated
Please provide the

PART IV — EVALUATION AND RECOMMENDATIONS
1. The applicant is not requesting modification of the facility or increasing flow at this time.
2. A review of the compliance data did not reveal any significant violations.
3. Based upon the previous Compliance Evaluation Inspection (CEI) that was conducted on
February 18, 2009, all units were in service, and this facility continues to comply with the
requirements of the NPDES permit for wastewater treatment.
4. This Office recommends continuation of the Special Conditions for the Whole Effluent
Toxicity monitoring.
5. This Office recommends that a formal Sludge Management Plan be included as a
requirement in the NPDES Permit and that it will be updated as needed and as
determined by the Division of Water Quality.
6. Based upon the above information, this Office recommends reissuance of the said permit
for the continued operation of an existing 4.0 MGD wastewater treatment facility
consisting of an influent pump station, mechanical bar screen, grit chamber, influent flow
monitoring, aerated equalization basin, flow splitter box, dual one million gallon per day
extended aeration basins with secondary clarification, chlorine contact chamber,
dechlorination, effluent force main, cascade aeration, and two aerobic sludge digesters,
and drying beds located at the Laurinburg Leith Creek Wastewater Treatment plant,
southeast of the City of Laurinburg, in Scotland County.

OUjofCaurnvurg AII-America City
11111
OFFICE OF THE TREATMENT PLANTS DIRECTOR
RECE/February 5, 2009, ss 2 3 1967
Mrs. Dina Sprinkle
NCDENR / Water Quality / Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
r - (:t
.. L
DENR - WATER QUALITY
Subject: Renewal Application Packet POINT SOURCE BRANCH
Permit# NC0020656
Leith Creek Wastewater Treatment Plant
Dear Mrs. Sprinkle:
Enclosed is the NPDES Form 2A Application for Permit Number NC0020656, the
City of Laurinburg's Leith Creek WWTP. We are requesting a renewal for this permit.
Question B 1: The governing board originally adopted the CIP March 19, 2002. Since
then the CIP has been updated annually to reflect the needs of the collection system and
pump stations to help eliminate Inflow & Infiltration concerns. Copies of the current CIP
are attached for your review.
The Authorized Representative for this facility is Mr. Craig Honeycutt, City Manager.
Sludge that is generated at this facility is land applied at Laurinburg-Maxton Airport in
connection with Land Application of Residuals Permit Number WQ0002526. Leith
Creek WWTP has two aerobic digesters with a total volume of 800,000 gallons. We try
to perform four land application events per year for a total of 3.2 million gallons.
However if we need to apply more we will lime stabilize to perform these events more
frequently.
We have one additional fathead minnow toxicity test to complete for the permit renewal
requirements. This test is being analyzed by our contract lab at this time. We will
forward the results as soon as we receive them.
If you have any questions concerning this Renewal request please contact me at 910-277-
0214
Sincerely,
Robert E. Ellis
Treatment Plants Director
603 LAUCHWOOD DRIVE • P.O. BOX 249 • LAURINBURG, N.C. 28353 • PHONE: [phone] • FAX: [phone]

Sewer Plan

CIP 5 Yr Plan
Capital Improvements (5) Year Plan
Sewer Lift Stations
Year
Pump Stations
Cost
2008-2009
Upgrade 74 Bypass Pump Station (Pumps, Motors & Valves)
$
90,000.00
2009-2010
Engineering Study to minimize the number of pump stations
30,000.00
2010-2011
Engineering & Plans for Bridge Creek Pump Station
40,000.00
2011-2012
Upgrade Electrical Controls at Pump Station
30,000.00
2012-2013
Upgrade Electrical Controls at Pump Station
30,000.00
220,000.00

Five Year Capital Projects
Sewer Projects
Year
Street
Problem
Est. Cost
City cost
Total cost
2009-2010
McKay Street
total cost
$675,000.00
$275,000.00
$ 775,000.00
grant
$500,000.00
city cost
$175,000.00
New Construction and repairs
$100,000.00
2010-2011
Creedle St. and area
total cost
$748,438.00
$174,843.00
$ 848,438.00
grant
$673,595.00
city cost
$74,843.00
New Construction and repairs
$100,000.00
2011-2012
Cronly Street
bad pipe
$287,548.00
$387,548.00
$387,548.00
New Construction and repairs
$100,000.00
$387,548.00
2012-2013
Fairly Street
bad pipe
$202,559.00
$503,059.00
$503,059.00
Gill to Dickson Street
bad pipe
$200,500.00
New Construction and repairs
$100,000.00
$503,059.00
2013-2014
S. Main to Biggs Street
bad pipe
$47,100.00
$362,975.00
$362,975.00
Biggs to Wilson Street
bad pipe
$121,675.00
Foraker to Taft Street
bad pipe
$94,200.00
New Construction and repairs
$100,000.00
$362,975.00