NC0021644_Permit (Issuance)_20031126

NPDES DOCUMENT !;CANNINO COVER SHEET
NPDES Permit:
NC0021644
La Grange WWTP
Document Type:
rPermit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
November 26, 2003
This document is printed on reuse paper - igizore any
content on the rejrerse side

F W A Te Michael F. Easley
� R 0 ��,p,� Governor
7 vl DENR William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
p• x "°`3sc. Alan W. Klimek, P.E., Director
Division of Water Quality
November 26, 2003
,\1r. Mike Taylor
Town of La Grange
P.O. Box 368
La Grange, North Carolina 28551
Subject: Issuance of NPDES Permit NC0021644
La Grange WWfP
Lenoir County
Dear Mr. Taylor:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we arc forwarding the attached NPDES discharge permit. This permit 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 May 9, 1994 (or as subsequently amended).
This final permit includes no major changes from the draft permit sent to you on August 27, 2003.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain
other permits which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit, please contact Mike Templeton at telephone number (919)
733-5083, extension 541.
cc: Central Files
Washington Regional Office/Water Quality Section
NPDES Unit
Neuse River Foundation
N. C. Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
Internet: h2o.enr.state.nc.us
Sincerely,
ORIGINAL SIGNED BY
Michael E. Templeton
Alan W. Klimek, P.E.
Phone: [phone]
lax: [phone]
DENR Customer Service Center: 1 800 623-7748

•
Permit N00021644
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, the
Town of La Grange
is hereby authorized to discharge wastewater from a facility located at the
La Grange Wastewater Treatment Plant
East King Street
La Grange
Lenoir County
to receiving waters designated as an unnamed tributary to Moseley Creek in the Neuse
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 January 1, 2004.
This permit and the authorization to discharge shall expire at midnight on June 30, 2008.
Signed this day November 26, 2003.
ORIGINAL SIGNED BY
Michael E. Templeton
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

l
Permit NCU021644
•
SUPPLEMENT TO PERMIT COVER SHEET
All previous N PDES Permits issued to this facility, whether for operation or discharge arc 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.
The Town of La Grange is hereby authorized to:
1. Continue to operate an existing 0.75 MGD wastewater treatment facility that
includes the following components:
• Automatic grit remover
• Comminutor
• Manual bar screen
• Influent flow measurement by Parshall flume
• Two equalization basins with lift pumps to the oxidation ditch
• Biological treatment in two parallel, mechanically -aerated oxidation
ditches
• Four submersible velocity mixers
• Three secondary clarifiers with scum removal and gravity sludge return
• Three parallel low -rate sand filters for tertiary treatment
• Effluent flow measurement by V-notch weir
• Chlorine contact chamber with flow -paced gas chlorine feed
• Dechlorination with sulfur dioxide
• Post -aeration
• Fixed mechanical aerator
2. Discharge from said treatment works at the location specified on the attached
map into an unnamed tributary to Moseley Creek, currently a class C-Swamp
NSW water in the Neuse River Basin.
Y8 Q 314C)12.1A01 C,.1 q
notsIgrrr9T 3:lfsf1o..'41

Town of La Grange WWTP
State Grid,Quad:
Latitude
Longitude
Receiving Stream
Stream Cbn&
F 27 SE / La Grange, NC
35' 18' 45" N
77° 46' 32" W
UT of Moseley Creek
C - SW - NSW
Permitted Flow: 0.750 MGD
Drainage Basin: Nee River Basin
Sub -Basin: 03-04-05
Facility
Location
not to scale
North
NPDES Permit NC0021644
Lenoir County

Permit NC0021644
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Permittec is authorized to discharge
treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittec as specified
below:
PARAMI ETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
'Type
Sample Location I
Flow
0.750 MGD
Continuous
Recording
Influent or Effluent
Total Monthly Flow
Monitor and Report (MG/month)
Monthly
Recorded or
Calculated
Influent or Effluent
BOD5, 20°C (April 1 — October 31)2
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent & Effluent
BOD5, 20°C
(November 1 - March 31)2
10.0 mg/L
15.5 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Solids (TSS) 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent & Effluent
NH3 as N (April 1— October 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
NH3 as N (November 1— March 31)
4.0 mg/L
12.0 mg/L
Daily.
Composite
Effluent
Total Residual Chlorine
17 µg/L
Daily
Grab
Effluent
pH
Between 6.0 and 9.0 standard units
Daily
Grab
Effluent
Fecal Coliform (geometric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Dissolved Oxygen
Daily average must be > 5.0 mg/L
Daily
Grab
Effluent
Dissolved Oxygen
Variable3
Grab
U, Di, D2
Temperature, 0C
Daily
Grab
Effluent
Temperature, 0C
Variable3
Grab
U, Di, D2
Total Zinc
Quarterly
Composite
Effluent
Total Phosphorus
2.0 mg/L (quarterly average),
Weekly
Composite
Effluent
TKN 5
Monitor and Report (mg/L)
Weekly
Composite
Effluent
NO3-N + NO2-N5
Monitor and Report (mg/L)
Weekly
Composite
Effluent
TN 5
Monitor and Report (mg/L)
Weekly
Composite
Effluent
TN Load6
Monitor and Report (pounds/month)
8,447 pounds/year (annual mass loading)?
Monthly
Annually
Calculated
Calculated
Effluent
Effluent
footnotes:
1. U: Upstream at NCSR 1540. Di: Downstream at NCSR 1518. D2: Downstream at NCSR 1327.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of their respective influent value (85%
removal).
3. Instream samples shall be collected three times per week (3/week) during the months of June through September and once per
week (1 /week) the remainder of the year. lnstream monitoring is provisionally waived based on the Town of La Grange's
membership in the Lower Neuse River Basin Association (LNBA). If at any time during the term of this permit, membership
in the LNBA is terminated, the Permittec shall notify the Division immediately, and immediately begin conducting instream
monitoring as stipulated in this permit.
4. The quarterly average for total phosphorus shall be the average of composite samples collected during each calendar quarter
(January -March, April _June, July -September, October -December).
5. For a given wastewater sample, TN = + NO;-N + NO2-N, where TN is 'Total Nitrogen, TKN is Total Kjeldahl
Nitrogen, and NO_;-N + NO2-N are nitrate and nitrite nitrogen, respectively.
6. TN Load is the mass quantity of 'Total Nitrogen discharged in a given period of time. See A. (2), Calculation of TN Loads.
7. The annual TN Load limit shall become effective with the calendar year beginning on January 1, 2003. Compliance with this
limit shall be determined in accordance with Special Condition A. (3) of this permit, Annual Limits for Total Nitrogen.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

Permit NCt11121'6-f4
A. (2)
CALCULATION OF TOTAL NITROGEN LOADS
a. The Permittee shall calculate monthly and annual TN Loads as follows:
i. Monthly TN Load (pounds per month) = TN x TMF x 8.34
Where:
TN = the average TN concentration (mg/L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the month (MG/month)
8.34 = conversion factor, from (mg/L x MG) to pounds
ii. Annual TN Load (pounds per year) = Sum of the 12 Monthly TN Loads for the calendar
year
b. The Permittee shall report monthly Total Nitrogen results (mg/L and pounds/month) in the discharge
monitoring report for that month and shall report each year's annual results (pounds/year) in the
December report for that year.
A. (3.) ANNUAL LIMITS FOR TOTAL NITROGEN
a. Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River basin
are annual limits and are applied for the calendar year.
b. For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit in this
Permit if:
i. the Permittee's annual TN Load is less than or equal to said limit, or
ii. the Permittee is a Co-Permittee i\lember of a compliance association.
c. The TN Load limit in this Permit (if any) may be modified as the result of allowable changes in the
Pcrmittee's TN allocation.
i. Allowable changes include those resulting from purchase of TN allocation from the Wetlands
Restoration Fund; purchase, sale, trade, or lease of allocation between the Permittee and other
dischargers; regionalization; and other transactions approved by the Division.
ii. The Permittee may request a modification of the TN Load limit in this Permit to reflect allowable
changes in its TN allocation. Upon receipt of timely and proper application, the Division will
modify the permit as appropriate and in accordance with state and federal program requirements.
iii. Changes in TN limits become effective on January 1 of the year following permit modification.
The Division must receive application no later than August 31 for changes proposed for the
following calendar year.
iv. Application shall be sent to:
NCDENR / DWQ / NPDES Unit
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
cl. If the Permittee is a member and co-Permittee of an approved compliance association, its TN discharge
during that year is governed by that association's group NPDES permit and the TN limits therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar year in which it
is identified as such in Appendix A of the association's group NPDES permit.
ii. Association roster(s) and members' TN allocations will be updated annually and in accordance
with state and federal program requirements.
iii. If the Permittee intends to join or leave a compliance association, the Division must be notified of
the proposed action in accordance with the procedures defined in the association's NPDF S
permit.
(1) Upon receipt of timely and proper notification, the Division will modify the permit as appropriate and
in accordance with state and federal program requirements.
(2) Membership changes in a compliance association become effective on January 1 of the year following
modification of the association's permit.
c. The TN monitoring and reporting requirements in this Permit remain in effect until expiration of this
Permit and are not affected by the Permittee's membership in a compliance association.

NORTH CAROLINA
WAYNE COUNTY.
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and State,
duly commissioned, qualified, and authorized by law to administer oaths,
personally appeared
Scott Bizzell
who being first duly sworn, deposes and says: that he (she) is
Legal Clerk
(Publisher, or other officer or employee authorized to make affidavit)
of WAYNE PRINTING COMPANY, INC., engaged in the publication of
a newspaper known as GOLDSBORO NEWS-ARGUS, published,
issued, and entered as second class mail in the city of Goldsboro in said
County and State; that he (she) is authorized to make this affidavit and
sworn statement; that the notice or other legal advertisement, a true
copy of which is attached hereto, was published in GOLDSBORO
NEWS-ARGUS on the following dates:
September 5, 2003
and that the said newspaper in which such notice, paper, document, or
legal advertisement was published was, at the time of each, and every
such publication, a newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General Statutes of North Carolina
and was a qualified newspaper within the meaning of Section 1-597 of the
General Statutes of North Carolina.
This 30 day of
September
(Signature of per!'! making affidavit)
Sworn to and subscribed before me, this 30 day of
, 20 03
My Commission expires:
nber , 2003
Notary Public
/01(9f0S
iNr.E
{{I OCT 2 2003
L.�
DENR-WATER QUALITY
POINT SOURCE BRANCH
CLIPPING OF LEGAL
ADVERTISEMENT
ATTACHED HERE
PUBLIC NOTICE
STATE OF NORTH CAROUNA
• ENVIRONMENTAL
MANAGEMENT COMMISSION!
NPDES UNIT
1617 MAIL SERVICE CENTER
• RALEIGH, NC 27699-1617 .
NOTIFICATION OF INTENT
TO ISSUE A
NPDES WASTEWATER PERMIT
On the basis of thorough staff
review and' application of NC
W.92.500 and other lawful
standards and regulations, the
North Carolina Environmental
Management Commission pro-
poses to Issue a National Pollu-
nt tteem (NPDES)ewastewater dis-
charge permit to the person(s)
listed below effective 45 days
from the publish date of this
notice.
Written comments regarding
the proposed permit will be ac-
cepted until 30 days after the
publish date of this notice. All
comments received prior to
that date are considered in the
final determinations regarding
the proposed permit. The Direc-
tor of the NC Division of Water
Quality may decide to hold a
public meeting for the proposed
permit should the Division re-
ceive a significant degree of
public interest.
Copies of the draft permit and
other supporting information on
file used to determine condi-
tions present in the draft permit
are available upon request and
payment of the costs of repro-
duction. Mail comments and/or
requests for Information to the
NC Division of Water Quality at
the above address or call Ms.
Valery Stephens at (919) 733-
5083, extension 520. Please in-
clude the NPDES permit num-
ber (attached) in any communi-
cation. Interested persons may
also visit the Division of Water
Quality at 512 N. Salisbury
Street, Raleigh, NC 27604-1148
between the hours of 8:00 a.m.
and 5:00 p.m. to review infor-
mation on file.
City of Kinston - Peachtree
WWTP, P.O. Bo 339, Kinston,
North Carolina 28502, has ap-
plied for renewal of its munici-
pal permit, NPDES No.
NC0020541, discharging 6.75
MGD municipal wastewater to
an unnamed tributary to the
Neuse River in the Neuse River
Basin. BOD5, ammonia, residu-
al chlorine, and dissolved oxy-
gen are water quality limited.
This may affect future dis-
charges in this portion of the
basin.
Kinston Regional Water Rec-
lamation Facility (formerly Kin-
ston - Northside WWTP), P.O.
Box 339, Kinston, North Caroli-
na 28502, has applied for re-
newal of its municipal permit
discharging to an unnamed
tributary to the Neuse River in
the Neuse River Basin. This
permitincludes the renewal of
the existing 4.5 MGD flow along
with the expansion phase to
11.85 MGD and relocation of
the discharge: to the Neuse Riv-
er (after elimination of the Kin-
ston - Peachtree WWTP dis-
charge). BOD5, ammonia,
chlorine, and dissolved oxygen
are water quality limited. This
may affect future discharges in
this portion of the Neuse River
basin.
The Town of La Grange (P.O.
Box 368, La Grange, NC 28551)
has applied for renewal of
NPDES permit NC0021644 for
its WWTP in Lenoir County. This
permitted facility discharges
treated domestic wastewater to
an unnamed tributary to Mosely
Creek in the Nouse River Basin.
Currently BOD, total Phosphor
rus, total nitrogen, ammonia ni-
, trogen and total residuat chlor-
ine are water quality limited.
This discharge May affect fu-
ture allocations in this portion
of the Neuse Rr bastn.
Legal # 029
September 5, 2003

DENR/D W Q
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES Permit NC0021644
Facility Information
Applicant/Facility Name:
Town of La Grange/La Grange Wastewater Treatment Plant
Applicant Address:
P.O. Box 368; La Grange, North Carolina 28551
Facility Address:
East King Street; La Grange, North Carolina 28537
Permitted Flow
0.750 MGD
Type of Waste:
Domestic (100%)
Facility/Permit Status:
Class IV /Renewal
County:
Lenoir County
Miscellaneous
Receiving Stream:
UT to Moseley
Creek
Regional Office:
Washington (WaRO)
Stream Classification:
C-Sw-NSW
State Grid / USGS Quad:
F27SE/La Grange.
NC
303(d) Listed?
No
Permit Writer:
Natalie V. Sierra
Subbasin:
03-04-07
Date:
August 25, 2003
Drainage Area (mi2):
0.44
Summer 7Q10 (cfs)
0
Winter 7Q10 (cfs):
0
30Q2 (cfs)
0.08
Average Flow (cfs):
IWC (%):
0.53
100%
•
Lat. 35° 18' 34" N Long. 77° 46' 34" W
BACKGROUND
The La Grange WWTP is a 0.750 MGD plant providing treatment for domestic wastewater from the
Town of La Grange. The existing permit for this facility was issued on October 9, 2000 and expired on
June 30, 2003. The Permittee applied for renewal using EPA Form 2A on December 30, 2002.
At the last permit renewal, this facility was one of a group selected for public hearing by the Neuse River
Foundation. Public comments of note were primarily concerned with the impact of severe inflow and
infiltration (I/I) problems; the Neuse River Foundation stated that the system was operating at over 86%
of the annual capacity. La Grange had obtained grant monies to rehabilitate the collection system but
had not made sufficient progress in the opinion of the public. The subsequently submitted Wastewater
Management Plan, along with a 2002 update suggests that the Town has been fairly aggressive about
obtaining funds to rehabilitate the collection system. The renewal application states that efforts made to
date have reduced flow to the WWTP by approximately 103,000 gallons per day. In addition, the Town
has received funds from the Lower Neuse Basin Association (LNBA) to reduce nitrogen by
approximately 14, 700 pounds per year.
Instream Monitoring and Verification of Existing Conditions and DMR Data Review
This facility discharges to Moseley Creek in sub -basin 03-04-07 of the Neuse River Basin. At the point
of discharge, Moseley Creek is not listed as impaired (as per the 2002 303(d) list). The Neuse River
estuary to which it drains, however, is on the 303(d) list for chlorophyll -a. As a result, Moseley Creek
has been given the nutrient sensitive (NSW) additional classification and Moseley MSD must adhere to
the nutrient limitations set out by basin plans and the Nitrogen TMDL.
The Town of La Grange is a member of the Lower Neuse Basin Association (LNBA), and instream
monitoring is performed through the LNBA. Only downstream data for Moseley Creek were available
for review. Temperature, dissolved oxygen (D.O.), pH, conductivity, turbidity, total suspended solids
(TSS), fecal coliform, ammonia nitrogen (NH3-N), total Kjeldahl nitrogen, total nitrogen and total
phosphorus data were all collected and reviewed. All parameter values seem typical with the exception
Fact Sheet
.I'Ut.ti NC.002 I 644 Renewal
Page 1

of periodically elevated fecal coliform levels. Since no upstream data is collected for Moseley Creek, it
is impossible to determine the source.
This permit contained limits for flow, BOD, TSS, NH3-N, D.O., fecal coliform, total nitrogen (TN), total
phosphorus (TP), pH and total residual chlorine. Effluent temperature must be monitored, but is not
limited. Data from Discharge Monitoring Reports (DMRs) was reviewed from January 2001 through
June 2003. Monthly average data for conventional parameters are summarized in Table 1, while
nutrients and toxicants are summarized in Table 2. The monthly average limit for flow has been violated
for the last three months of review (April - June 2003). This may be attributable to I/I, given the large
volume of rainfall experienced in North Carolina recently.
1111210211111
Maximum
Minimum
Flow Temp. D.O. BOD
(MGD) (deg. C) (mg/L) (mg/L)
0.488
0.8146
0.3108
18.75
27.07
10.22
7.48
8.94
6.3
1.00
2.41
0
TSS
(mg/L)
1.06
4.2
0.05
Fecal
(#/100m1)
31.76
173.24
2.3
Table 1 - NC0021644 Monthly average effluent data for conventional parameters (January 2001-June 2003)
Maximum
Minimum
Total Residual
Chlorine (mg/L)
6.72
11.43
0
NH3-N Total Nitrogen Total Phosphorus
(mg/L)
0.23
0.92
0
(mg/L) (mg/L)
4.50
14.77
2.41
0.45
1.77
0.02
Table 2 - NC0021644 Monthly average effluent data (January 2001-June 2003)
Correspondence
The Washington Regional Office (RRO) conducted two site visits to evaluate compliance with the permit
and prepared a Staff Report in conjunction with this permit renewal. The staff report does not note any
deficiencies and recommends renewal of the permit. The two Compliance Evaluation Inspections
indicate a well -run facility and note the progress of the I/I rehabilitation work.
Within this permit term, the Town of La Grange has received one Notice of Violation for a violation of
the dissolved oxygen limit in July 2002. With the exception of the recent flow violation, the facility has
otherwise been compliant with the terms of the NPDES permit.
PERMITTING STRATEGY
Waste Load Allocation (WLA)
The Division prepared the last WLA for the previous permit renewal. The previous and current effluent
limits were based on guidelines and water quality standards. The Division has judged previous
parameters and limits to be appropriate for renewal with some exceptions (see Priority Pollutant Analysis
and Neuse TMDL).
Weekly average ammonia limits based on a 3:1 ratio with the monthly average (but no higher than 35.0
mg/L) will be implemented in this permit. This is a new statewide policy that resulted from EPA
requirements. The current summer monthly average limit is 2.0 mg/L, which results in a summer weekly
average limit of 6.0 mg/L. Likewise, the winter monthly average limit is 4.0 mg/L, so the winter weekly
average limit is 12.0 mg/L.
An annual pollutant scan will not be added to this permit, as it is a 100% domestic facility under 1 MGD.
Priority Pollutant Analysis
The Priority Pollutant Analysis (PPA) submitted with the renewal application indicated detection of the
following: zinc and chloroform. The level at which chloroform was detected is consistent with
laboratory contamination. Quarterly zinc monitoring will be added to the NPDES permit to monitor the
levels of this toxicant in the effluent.
Neuse TMDL
The permit includes nutrient limits consistent with the Nutrient Management Strategy rule (TI5A NCAC
2B .0234).
Fart Sheet
�PI)i:S NC00221644 Rencw al
1'4.

Nitrogen
The Environmental Management Commission adopted Nutrient Management Strategy rules in December
1997, classifying the entire Neuse River Basin as Nutrient Sensitive Waters. The point source rule (T15A
NCAC 2B .0234) sets Total Nitrogen (TN) discharge limits for all point source dischargers larger than
0.5 MGD.
The rule also allows dischargers to form a group compliance association and work together to reduce
nitrogen; this option allows the association members added flexibility in controlling nitrogen discharges.
At the same time, the association is subject to a group NPDES permit ensuring that the association and its
individual members are accountable if they exceed the applicable nitrogen limits.
Under the rule, there are three types of TN limit in the Neuse:
1. the individual limits in the dischargers' individual permits,
2. the aggregate limit in an association's group NPDES permit, and
3. the individual allocations/limits for each Association member, also in that association permit.
A discharger may be subject to the first type of limit, or to the second and third, but never to all three at
the same time. The discharger is first subject to the TN limit (if any) in its individual NPDES permit. If
becomes a co-Permittee to a compliance association's group NPDES permit, it is then governed by the
TN limits in that permit. If the association complies with its group TN limit in a given year, all members
are deemed to be in compliance with their individual allocations/ limits in the group permit. If the
association exceeds its limit, the members then become subject to their individual allocations/ limits as
well.
Regardless of which permit governs a TN discharge, allocations/ limits will likely change over time as
the dischargers purchase, sell, trade, lease, or otherwise transfer nitrogen allocations. The Division will
modify the affected permits as necessary to ensure that the limits are kept up to date and reflect any such
transactions.
Under the new rule, the Permittee receives a TN Load limit of 8,447 lb./yr., a calendar year limit. This
limit will be calculated annually. In addition to this limit, the Permittee will be required to report total
monthly flow, total kjeldahl nitrogen and the sum of nitrate and nitrite in addition to the existing
requirement to report monthly total nitrogen concentrations and loads.
The Town is a member of the Neuse River Compliance Association at this time. So long as it remains a
co-Permittee member, it is deemed to be in compliance with the TN limit in this permit, and its TN
discharge is governed instead by the Association's group NPDES permit, issued December 30, 2002.
Phosphorus: The Permitee's 2.0 mg/L Total Phosphorus limit is carried forward in the new permit.
SUMMARY OF PROPOSED CHANGES
In keeping with Division policies, the following will be incorporated into the permit:
• New weekly average ammonia limit
• Updated Neuse Total Nitrogen language
• Monitoring and reporting requirements for total monthly flow, TKN, nitrate and nitrite.
• Added quarterly monitoring for zinc
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
ATTACHMENTS: DMR data summary, Instream data
August 27, 2003
October 31, 2003
Fact Sheet
`PI )I :; `(:Ou2 1(44 IZt nevi;a1
Page 3

NPDES CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Natalie Sierra at [phone] ext. 551.
NAME: 5:;&<- DATE: a
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
I'aet Sheet
NPDI.S N(.1102 1644 Renewal
Page 4

NC0021644 - Town of LaGrange
Temp. (deg. Fecal (#/I (10 NE13-N
Date Flog (MGD) Cl D.O. (mg/L) ,13OD (nrg/L) "1:SS (mg/I.,) ml.) '1RC (ug/L) (mg/1.,) TN (mg/L) L'P (mg/L)
Jan-01 0.404
Feb-01 0.4367
Mar-01 0.5431
Apr-01 0.5469
May-01 0.3807
Jun-01 0.5989
Jul-01 0.5095
Aug-01 0.5749
Sep-01 0.5028
Oct-01 0.363
Nov-01 0.33733
Dec-01 0.312839
Jan-02 0.494581
Feb-02 0.494821
Mar-02 0.5609871
Apr-02 0.601867
May-02 0.487903
Jun-02 0.401167
Jul-02 0.433516
Aug-02 0.376
Sep-02 0.340633
Oct-02 0.310806
Nov-02 0.3573
Dec-02 0.389032
Jan-03 0.353129
Feb-03 0.460357
Mar-03 0.696871
Apr-03 0.799133
May-03 0.766677
Jun-03 0.8146
10.82 8.94 1.56 0.4 2.6 8 0.06 1-1. 77 0.85
12.9 8.88 0.2 0.2 3.9 4.6 0.05 0.86
13.71 8.51 1.27 4.2 3 9.5 0.92 0.74
17.14 7.65 0 0.3 2.3 5.05 0.25 3.7 0.11
20.48 6.8 0 0.2 3.2 5 0.38 0.02
24.06 7.35 0.24 0.5 7.2 2.05 0.11 0.02
25.4 7.55 0.3 0.6 11.6 7.24 0 5.16 0.19
26.23 7.44 0 0.1 5.8 8.43 0 0.48
24.38 7.56 0.4 0.2 9.3 2.63 0.36 0.895
20.53 6.93 0.13 0.1 6.1 2.96 0.33 4.87 0.5
17.56 7.325 0.55 0.25 13.41 3.75 0.433 7.97 0.16
15.63 6.82 0.63 0.17 34.48 7.06 0.17 5,13 0.09
12.03 7.13 2.35 2.46 173.24 10.71 0.22 4 0.09
12.83 7.47 2.41 2.99 70.498 11.1 0.14 3.7 0.05
14.94 8.54 2.02 1 29.86 10.15 0.06 3.8 0.05
19.1 7.19 2.22 1.88 47.62 11.23 0.06 5.05 0.025
21.49 6.3 2.18 1.14 10.36 11.18 0.11 4.42 1.77
25.35 6.495 0.56 0.35 40.26 2.1 0.04 3.7 1.16
26.85 6.55 0.11 0.3 37.6 8.77 0.05 4.395 1.57
27.07 7.21 0.42 0.37 37.14 8.41 0.04 4.844 1.28
25.595 7,26 0.45 0.05 41.44 7.9 0.06 4.5075 0.59
22.34 8.17 2.28 1.03 40.56 10.78 0.05 2.68 0.23
16.83 7.88 2.06 1.74 29.97 10 0.56 2.69 0.2
12.45 6.85 1.02 0.22 36.21 0 0.16 4.11 0.38
10.22 6.93 0.75 1.95 32.298 1.67 0.91 3.02 0.24
10.83 7.44 0.25 0.27 25.07 0.7 0.38 3.12 0.13
14.74 7.85 0.57 1.68 108.72 0 0.14 2.94 0.16
16.74 8.07 1.06 2.41 38.44 8.095 0.21 2.41 0.16
20.5 7.66 1.72 2.05 21.56 11.19 0.24 3.48 0.33
23.61 7.51 2.41 2.67 29.18 11.43 0.41 3.65 0.23
Average (1.488 18.7 • 7.48 1.00 .1.06 31.76 6.72 0.23 4.50 0.45
Maximum 0.8146 27.07 8.94 2.41 .2 173.24 11.43 0.92 14 7, 1.77
Minimum 0.3108 10.22 6.3 0 0.05 2.3 0 0 2.4i 0.02

DATE
11/09/2000
12/15/2000
01/29/2001
02/27/2001
03/30/2001
04/19/2001
05/07/2001
05/22/2001
06/12/2001
06/25/2001
07/09/2001
07/17/2001
08/09/2001
08/24/2001
09/12/2001
09/25/2001
10/11/2001
11/15/2001
12/05/2001
01/14/2002
02/13/2002
03/25/2002
04/19/2002
05/06/2002
05/27/2002
06/10/2002
06/20/2002
07/11/2002
07/18/2002
08/13/2002
08/27/2002
09/09/2002
09/25/2002
10/10/2002
11 /21 /2002
12/12/2002
17.9
10.0
7.2
11.9
11.0
11.0
15.6
24.1
27.0
22.8
22.3
21.3
23.8
22.8
20.2
20.4
15.9
13.1
12.4
6.9
9.9
14.8
21.8
17.9
21.0
20.5
22.7
24.1
26.3
24.5
23.7
22.3
21.4
19
13
10
U
N
0
J
U
N
173.
J 3 `= • Z 2
o
a_ E
ii v T
13
I C L
I 0
0. U h H
6.7 6.6 120 3.4 3
8.4 6.4 122 2.8 2.5
10.2 6.8 109 4.8 4
8.4 6.0 108 4.4 1.5
7.8 6.1 110 11 4
9.4 6.5 111 20 1 <
7.7 6.3 117 2.6 2.7
6.4 6.3 113
5.1 6.8 113 8 14.4
5.2 6.0 94
6.8 6.8 108 1.9 2.2
7.3 7.1 109 1.7
6.3 6.7 114 1 4
5.3 6.5 100
6.3 6.7 100 1.8 1.5
5.4 6.6 94
7.2 6.6 102 1.8 1 <
8.0 6.8 114 1.2 1.3
8.2 6.9 120 2.4 3.5
9.2 5.9 111 5.3 3.3
9.1 6.7 115 4.1 1
8.8 6.7 108 3 1.5
7.2 6.4 109 3.8 2.6
9.4 6.2 99 4 2.5
9.0 6.6 102
9.0 6.6 100 2 2.5 <
8.7 6.7 113
5.4 6.0 100 4 3.1
95
111 1.9 1.1
102
108 1.4 1.1
8.1 6.3
7.53 6.83
7 6.6
7.4 6.8
7.9 6.2
7 6.6
7.6 6.4
8.4 6.3
111
117
150
128
2
cc
U)
I-
E
O
O
0
c
0)
E
O
J
U E
M
u_ Z
68
52
164
108
94
110
72
0.01
0.05
0.12
0.06
0.03
0.06
0.02
110 0.06
60 0.03
40 0.12
48 0.08
88 0.01 <
19 0.01
98 0.03
118 0.07
44 0.04
91 0.03
133 0.09
185 0.07
J
rn
E
C') J P
E
zE z E
N Z To
Z I-- I- I--
2.14
2.14
3.1
2.32
0.39
2.4
2.19
0.6
0.6
0.3
0.5
0.6
0.7
0.4
2.74
2.74
3.4
2.82
0.99
3.1
2.59
0.11
0.05
0.07
0.05
0.05
0.15
0.11
0.52 0.4 0.92 0.12
1.6 0.5 2.1 0.11
1.76 0.3 0.12
1.34 0.4 1.74 0.16
2.04 2.04 0.06
1.7 0.1 1.8 0.07
1.65 0.3 1.95 0.16
1.25 0.5 1.75 0.09
1.96 0.5 2.46 0.06
1.75 0.5 2.25 0.1
1.48 0.8 2.3 0.19
1.37 0.6 1.97 0.12
66 0.03 1.85 0.4 2.25 0.08
8400 0.02 0.49 0.7 1.19 0.2
< 78 0.03 < 2.02 0.3 0.07
K 290 0.01 1.87 0.3 0.09
2.1 2.0 U 116 0.01
4.7 2.6 116 0.05
3.1 2.2 250 0.01
2.01 0.3
1.30 0.5
1.50 0.3
0.09
0.07
0.06
Average
18.1
7.6
6.5
109.9
4.0
2.8
423.8
0.0
1.7
0.5
2.2
0.1
Maximum
27.0
10.2
7.1
150.0
20.0
14.4
r
8400.0
0.1
3.1
0.8
3.4
0.2
Minimum
6.9
5.1
5.9
94.1
1.0
1.0
19.0
0.0
0.4
0.1
0.9
0.1
NC0021644

imap://charles.weaver%40dwq.derv. ncmail.net@cros. ncmail. net:143/...
Subject: comments on permits
From: Mike Templeton <[e-mail]>
Date: Mon, 25.Aug 2003 19:30:58 -0400
To: Natalie Sierra <[e-mail]>, Charles Weaver <[e-mail]>
Natalie -
Thanks for all the permits - surfs up!
Here are the few comments I can offer on the drafts. All appear ready to go forward with little or no
change on your part. Once you have them ready, pis forward them to Charles. I noticed some minor
formatting corrections (odd page breaks, for instance), but I'll leave it to Charles to look at the documents
and make any necessary changes before he prints them out.
Elizabethtown - Looks good - go for it.
Murphy - In the cover letter, you shouldn't have to apologize for past errors. Suggest you word it in a
more straightforward way:
"The Instream Waste Concentration (IWC) for the toxicity limit at 1.4 MGD has been
changed to 2.2% to correct an error in the previous permit renewal."
Spruce Pines - A couple of points in the fact sheet may be worth clearing up: It sounds like the Town
expanded its plant to handle the higher flows caused by I/I rather than fix the I/I problem. Is that
correct? Also, it sounds like all of the industrial users left once the Town started implementing its
pretreatment program. Is that how it went?
La Grange - One minor point - the table on p.1 of the Fact Sheet gives an IWC of "90% for toxicity
purposes." Since there is no tox limit, should this be dropped to avoid confusion?
Contentnea MSD - There is a potential issue regarding "effluent channel" status and their discharge
point - did the Region ever mention the issue? It came up during the 2000 renewal but was never
resolved that I know of. In short, the plant discharges to a man-made channel, several hundred yards
long, that runs to the creek. Our limits are based on the IWC at the creek; it appears they should be
changed to reflect the IWC in the channel (approx. 100%).
That's it. I'll be gone Tuesday, back on Wednesday. See you then (so to speak).
-MikeT
Michael E. Templeton, P.E.
North Carolina Division of Water Quality
NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
919-733-5083 x541 FAX: [phone]
mailto:[e-mail]
1 of 1 8/26/2003 11:37 AM

SOC PRIORITY PROJECT: YESNO_X_
IF YES, SOC NO.
To: Permits and Engineering Unit
Water Quality Section
MAR - 3 2003
Attn: Jackie Nowell
Date: February 27, 2003
NPDES STAFF REPORT AND RECOMMENDATION
Lenoir County
Permit No. NC0021644
PART I - GENERAL INFORMATION
1. Facility and Address: LaGrange WWTP
P.O. Box 368
LaGrange NC 28551
2. Date of Investigation: January 28, 2003
3. Report Prepared by: Kristin Jarman
4. Person(s) contacted and telephone number(s):
Mr. Wesley Sutton - ORC [phone]
5. Directions to Site: From Highway 903 North in LaGrange, turn east on East King
Street. Proceed to end and turn left, through gate in chain link fence to WWTP.
6. Discharge Point:
Latitude: 35 18' 34" Longitude: 77 46' 34"
Attach a USGS map extract and indicate treatment facility site and discharge
point on map.
USGS Quad. No. USGS Quad Name: LaGrange NC
7. Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography (relationship to flood plain included): Site is on the side and crest of
a hill above the flood plain of Moseley Creek, approximately 20-30 feet above
MSL.

rep
9. Location of nearest dwelling: approx. 1500 feet southwest of the site.
10. Receiving stream or affected surface waters: Moseley Creek
a. Classification: C Sw NSW
b. River Basin and Subbasin No.: 03-04-05
c. Describe receiving stream features and pertinent downstream uses:
Mainly drainage and wildlife habitat support.
PART II —DESCRIPTION OF DISCARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: .75 MGD
b. What is the current permitted capacity of the Wastewater Treatment
facility? .75 MGD
c. Actual treatment capacity of the current facility (current design capacity)?
.75 MGD
d. Date(s) and construction activities allowed by previous Authorizations to
Construct issued in the previous two years: NA
e. Please provide a description of existing or substantially constructed
wastewater treatment facilities: Automatic grit remover, a comminutor,
manual bar screen, influent flow meter, secondary biological treatment
(activated sludge) in 2 parallel, mechanically -aerated oxidation ditches (2
each, submersible velocity mixers (total 4), 2 parallel secondary clarifiers
with scum removal and gravity sludge return, 3 parallel low -rate sand
filters for tertiary treatment, effluent flow meter, chlorine contact chamber
with gas chlorine feed, dechlorination with sulfer dioxide, post aeration
with fixed mechanical aerator.
f. Please provide a description of proposed wastewater treatment facilities:
None
g•
Possible toxic impacts to surface waters: None known
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify
DWQ permit no. WQ0010488
Residuals Contractor: Synagro Southeast , Inc.
Telephone No. 336-766-0328

b. Residuals stabilization: PSRP_x_ PFRP Other
c. Landfill:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating sheet): Grade IV
Biological WPCS
4. SIC Code: 4952
Wastewater Code of actual wastewater, not particular facilities.
001-- Primary 01_ Secondary 03
Main Treatment Unit Code: 107 3
PART III —OTHER PERTINTENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public
monies involved? (municipals only) NA
2. Special monitoring or limitations (including toxicity) requests: None
3. Additional effluent limits requested: None
4. Other:
PART IV —EVALUATION AND RECOMMENDATION
The Washington Regional Office recommends that this permit be reissued. Please send a
copy of the draft permit to this office before the Public Notice is issued.
Signature 4 ' - port Preparer
l�
Water uality Regional Supervisor
Date

WOODARD 11. GURLEY, MAYOR
ELLIOTT SUTTON, MAYOR PRO TEM
COUNCIL MEMBERS
JOSEPH T. HARRISON
RUBY ADAMS
HOLTON HARRISON
CHRIS HUMPHREY
BOBBY WOOTEN
December 23, 2002
TOWN OF LA GRANGE
P.O. BOX 368
120 EAST RAILROAD STREET
LA GRANGE, NORTH CAROLINA 28551
Phone [phone] Fax [phone]
CERTIFIED MAIL 7002 2030 0007 5732 7193
Mrs. Valery Stephens
NC DENR/Water Quality/Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Permit NC 0021644 Renewal
Town of La Grange WWTP
Lenoir County
Dear Mrs. Stephens:
MIKE TAYLOR, TOWN MANAGER
PHYLLIS T. HARRISON
TOWN CLERK and FINANCE OFFICER
JOHN L. SULLIVAN, JR.
CHIEF OF POLICE
AUBREY ROUSE
DIRECTOR OF PUBLIC WORKS
DEC 3 0 2002
Enclosed you will find three (3) completed applications to renew the Town's NPDES
permit.
In 1999 the Town received a grant from the Lower Neuse Basin Association to reduce
nitrogen by approximately 14,700 pounds per year. The Town has performed
approximately $3,600,000 improvements to reduce I/I in the wastewater collection
system which has reduced flow to the WWTP by approximately 103,000 gallons per
day. These two items are the only changes that have been made since the issuance of
the last permit that affect the WWTP.
If any additional information is needed feel free to contact me.
Sincerely,
1h4 -raaa-•
Mike Taylor
Town Manager

B.3 Process Flow Diagram Narrative
MI The Town of La Grange wastewater treatment plan schematic diagram and supporting
documentation provides an accurate depiction of flows within the treatment facility. As
indicated by the diagram, influent enters the plant and passes through the grit chamber
cow, and communitor/by-pass screen. After flowing through a parshall flume to provide a
record of instantaneous inflow rates, the wastewater flume enters a raw water pump
station which directs the stream to the oxidation ditches. Effluent from the oxidation
r-► ditches flows by gravity to the clarifiers. Effluent from the clarifiers enters the tertiary
sand filters for additional treatment. Effluent from the sand filter enters into the chlorine
contact tank. Dechlorination is provided through the addition of sulfur dioxide. Following
dechlorination, the wastewater receives post -aeration prior to discharge.
A portion of the settled sludge from the clarifiers is returned to the oxidation ditches via
'-' the raw water pump station. The remaining portion is directed to either a digester or a
sludge holding lagoon. Digested sludge is land applied as conditions allow.
pm
P,
MI
fall

LAGRANGE WASTEWATER TREATMENT
PLANT
LAGRANGE, NORTH CAROLINA
December 1994
THE WOOTEN COMPANY
Engineering • PIanning • Architecture
Raleigh/Greenville, North Carolina

TABLE I-1
arl
DESIGN DATA OF LA GRANGE WASTEWATER TREATMENT PLANT
Design Year
Population Equivalent (based upon 0.171b BODs/personlday
' "' Design Wastewater Flows, mgd
f gal
Average Daily Flow
Maximum Daily Flow
Peak Daily Flow
2010
0.750
1.500
1.875
Design Wastewater Characteristics
BOD5 (Biochemical Oxygen Demand), mg/L 200
Y
TSS (Total Suspended Solids), mg/L 210
TKN (Total Kjeldahl Nitrogen), mg/L 40
NH3-N (Ammonia Nitrogen as N), mg/L 15
Total Phosphorus as P, mg/L 6
Total Alkalinity as CaCO3, mg/L 120
pH, Standard Unit
6.8 - 7.2
Temperature, ° C Winter = 10; Summer = 25
Effluent Limitations
Summer Winter
Average daily flow, mgd 0.750 0.750
BOD5, mg/L 5 10
TSS, mg/L 30 30
NH3, mg/L 1 1.8
Dissolved Oxygen, mg/L 6 6
Fecal Coliforrn, geometric mean 200/100 mL 200/100 mL
Total Residual Chlorine, µg/L 17 17
Total Phosphorus, as P, mg/L 2 1
Grit Removal System
Number of Units, Pista Vortex Type 1
Chamber diameter, ft 6.5
Chamber depth, ft 3.67
Chamber volume, gal 911
Detention time at maximum flow, min. 0.87
Grit hopper diameter, ft 3
Grit removal and dewatering: by air lift and screw classifier
Grit removal: by landfill i n g
Mechanical Screen
Number of Units
Channel width, ft 1.25
Bar spacing, inch 0.75
Unit capacity, mgd 1.375

TABLE I-1
DESIGN DATA OF LA GRANGE WASTEWATER TREATMENT PLANT
(continued)
Accessories: Manual and automatic control for rake activation. Provide
conveyor belt and dumpster.
Bypass Screen
Number of Units 1
Chamber width, ft 1.25
Bar spacing, inch 1.25
Unit capacity, mgd 1.875
Method of cleaning Manual
Parshall Flume (For Influent Flow Measurement)
Number of units, 6-inch size 1
Accessories: Flow indicator, recorder, and torn 1 i zer
Oxidation Ditches:
Number of units 1
Liquid depth, ft 8
Unit volume, mil. gal 0.45
Total volume, mil. gal 0.90
Detention time, hr, at avg. daily flow 28.8
BOD5 to oxidation ditches, lb BOD5/1000 cu ft 10.39
MLVSS concentration, mg/L 2730
F/M, lb BOD5 /lb MLVSS 0.06
MCRT, days 24
Number of aerators, 42-inch diam x 22 ft
brush rotor with 25-hp drive unit, each/tank 1
Total number of aerators 2
Total horsepower provided, hp 50
Aerator capacity at 8.7-inch immersion,
lb 02 /hp-hp/ft of rotor 2.48
Total aeration capacity, lb 02 /hp/hr 109
Total oxygenation capacity, lb 02 /lb BODR 2.14
Clarifiers
Number of Units, 30-ft diam x 12 ft SWD, each
Unit volume, gal 63,448
Total Volume, gal 190,334
Detention Time, hr, at avg. daily flow 6
Unit surface area, sq ft 706
Total surface area, sq ft 2118
Surface Overflow Rate, gpd/sq ft y354
Unit weir length, ft 88
Total weir length, ft 264
Weir overflow rate, gpd/lin ft 2840

TABLE I-1
tAlq
RIO
PRI
n
farl
raq
DESIGN DATA OF LA GRANGE WASTEWATER TREATMENT PLANT
(continued)
Lime Feed System
Lime storage capacity, cu ft
Lirne feed rate, lb hydrated lime/hr
Chemical Phosphorus Removal Facilities
Alum Feed System:
Total Phosphorus, mg/L
Phosphorus Removal in Cell Synthesis,
Design Mole Ratio, AI:P
Alum Dose, mg/L
Number of Metering Pumps
Metering Pump Capacity, gal/hr, each
Number of 5,000-gal Bulk Storage Tanks
Accessories: Pacing of metering pump
piping, controls, spill containment, and housing.
Polymer Feed System:
Number of metering pumps
Metering pump capacity, gal/hr, each
Number of gal, mixing/aging tank
Accessories: Pacing of metering pump with effluent flowmeter, necessary
piping, controls, spill containment, and housing.
Tertiary Filtration
Filters:
1880
2-50
Influent = 6; Effluent = 1
mg/LP = 1
100 mg / L BOD,
2.2:1
85.21
0- 10
with effluent flowmeter, necessary
Number of filters, 10 ft x 10 ft, mixed media type
Total surface area, sq ft
Filtration rate at average flow, gpm/sq ft
Filtration rate at maximum flow, gpm/sq ft
Filtration rate at peak flow, gpm/sq ft
Maximum wash rate at 21 °C, gpm/sq ft
Filter media: Anthracite: 2-ft 3-inch depth of the media. Particle sizes
ranging from 1.2 mm to 1.6 mm, with not more
than 13% by weight being larger than 1.6 mm
nor more than 18% by weight being smaller
than 1.2 mm. Sp. gravity of anthracite is 1.57.
Sand: 12-inch depth of the media. Particle sizes
ranging from 0.5 mm to 0.84 mm, with not
more than 10% by weight being larger than
0.84 mm nor more than 25% by weight being
smaller than 0.50 mm. Sp. gravity of sand is
2.50.
2
5
3
300
1.74
3.47
4.34
22.5
I - 8

TABLE I-1
MIR
I1
Su,
fart
DESIGN DATA OF LA GRANGE WASTEWATER TREATMENT PLANT
(continued)
Gravel: 13-inch depth of the media, which consists of:
4 inches of 1/8-inch x No. 16 mesh
3 inches of 1/8-inch x 3/8-inch
3 inches of 3/8-inch x 1-inch. ••
3 inches of 5/8-inch x 1-inch
Undergrain system: Wheeler bottom type.
Filter Backwash Pumps:
Number of pumps 2
Pump capacity, gpm, at 35 ft TDH, each 2250
Drive horsepower, hp, each pump 30
Surface Wash Pumps:
Number of pumps 2
Pump capacity, gpm, at 198 ft TDH 100
Filter Backwash Clear Water Storage Tank
Number of Tanks 1
Tank Volume, gal 22,670
Chlorination System
Chlorine Contact Tanks:
Number of tanks, 21-ft 6-inch x 8-ft 6-in x 5-ft 0-inch SWD 2
Unit volume, gal 6250
Total Volume, gal 12,500
Detention time at average daily flow, minutes 30
Chlorine Feed System
Number of chlorinators
Chlorine feed rate
Number of one -ton cylinders
Dechiorination System
Number of sulfonators
Sulfur dioxide feed rate, lb/day
Number of 150-1b SO2 cylinders
Postaeration
Number of Units, 18-ft 0-inch x 18-ft 6-inch x 6-ft 0-inch
Total volume, gal
Detention time, at average daily flow, minutes
Type of aeration: submerged, self -aspirating type
20 - 200
4
0-25
1
14,945
28

TABLE I -I
DESIGN DATA OF LA GRANGE WASTEWATER TREATMENT PLANT
(continued)
Number of aerator, 7-1/2 hp 1
Aerator capacity CWTR at 41 cu ft/min air flow and STP, in lb 02/hr 25
Aerobic SIudge Digestion
Number of Tanks, 45 ft diam x 15.0 ft SWD
Tank volume, cu ft
Volatile solids reduction, percent
Sludge retention time, days, at 2% solids
Type of aeration
Aeration Capacity, cfrn/1000 cu ft
Stabilization Lagoons (Used for flow equalization.)
Number of Lagoons
Size of each lagoon
Area at water surface:
Area at bottom:
Side slopes
Liquid depth
Volume of each lagoon, gal
Total volume, gal
Pumps:
Raw Wastewater plus sludge
recirculation pumps
Filter backwash pumps
Surface ash pumps
Lagoon supernatant return
pumps
Digested Sludge pumps
Lagoon #1
780 x 334 = 260,520 sq ft
775 x 320 = 248,000 sq ft
2:1
3.5 ft
4
2
2
2
2
* Capacity lised is for each pump.
6,655,856
hp/each Unit
10
30
7.5
5
10
1
28,844
40
30
Coarse bubble, diffused air
25
Lagoon #2
780x334=260,520sgft
775 x 320 = 248,000 sq ft
2:1
3.5 ft
6,665,856
13,3.11,708
TDH Design Capac i v.
35 ft
35 ft
198 ft
55 ft
32 ft
630 gpm
2250 gpm
100 gpm
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LAGRANGE WASTEWATER TREATMENT PLANT
LAGRANGE , NORTH CAROLINA

N MI
DESIGN AND PERFORMANCE DATA FOR THE TOWN OF LA GRANGE
WASTEWATER TREATMENT PLANT
Design Year 2010
Population Equivalent (based upon 0.17 lb BOD5/person/day) 7,359
Design Wastewater Flows, mgd
Average Daily Flow 0.750
Maximum Daily Flow 1.500
Peak Daily Flow 1.875
Design Wastewater Characteristics
BOD5 (Biochemical Oxygen Demand), mg/L 200
TSS (Total Suspended Solids), mg/L 210
TKN (Total Kjeldahl Nitrogen), mg/L 40
NH3-N (Ammonia Nitrogen as N), mg/L 25
Total Phosphorus as P, mg/L 6
., Total Alkalinity as CaCO3 , mg/L 120
pH, Standard Unit 6.8 - 7.2
N M
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Effluent Limitations
Average daily flow, mgd
BOD5, mg/L
TSS, mg/L
NH3, mg/L
Dissolved Oxygen, mg/L
Fecal Coliform, geometric mean
Total Residual Chlorine, µg/L
Total Phosphorus, as P, mg/L
Actual Plant Performance
14 mg/L
12 mg/L
10 mg/L
8 mg/L
6 mg/L
4 mg/L
2 mg/L
0mg/L'
Summer Winter
0.750 0.750
5 10
30 30
1 1.8
6 6
200/100 mL 200/100 rnL
17 17
2 2

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Mike Taylor
Town of La Grange
P. O. Box 368
La Grange, NC 28551
Dear Permittee:
t IT rA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
July 24, 1998
Subject: Data Verification for NPDES Permit NC0021644
La Grange WWTP
Lenoir County
The Division of Water Quality is conducting a critical short-term review of Total Nitrogen discharge data in the Neuse
River Basin. By this letter, we are requiring that you submit certain 1995 monitoring data to the Division no later than
August 7, 1998, as explained below.
In December 1997, the Environmental Management Commission (EMC) adopted the Neuse River Basin
Nutrient -Sensitive Waters Management Strategy rules (15A NCAC 2B.0200). The Division used 1995 Total Nitrogen (TN)
data from the permitted dischargers in the basin to estimate the annual nitrogen loading from all point sources. The
estimated TN load was used to establish the individual and group TN allocations found in the rules (15A NCAC
2B.0234).
Recent review of the data has raised questions about the validity of the estimated TN load. The Laboratory Certification
Unit has also reported that calculation errors are still common when determining values for TN concentration in effluent
samples. The Division is taking a fresh look at the 1995 TN data to determine whether they contain significant errors
which could affect the estimated TN load and allocations. The Division is scheduled to present findings from this review
at the September EMC meeting. It is essential that the data be gathered quickly and reviewed.
By this letter, the Division requires the subject facility to collect all laboratory data sheets and/or bench sheets for all
nitrogen species analyses (NO„ NO,, NH, and/or TKN) of the subject facility's effluent discharges monitored in calendar
year 1995. Submit the data to the Division no later than August 7, 1998. Send data packages to:
Charles Weaver
NC DENR - DWQ - NPDES Unit
P.O. Box 29535 or 512 North Salisbury Street
Raleigh, NC 27626 Raleigh, NC 27604
(mailing address) (physical address)
We appreciate your prompt attention to this matter. If you have any questions regarding this request, please contact
Mark McIntire at [phone] (extension 553), Charles Weaver (extension 511) or Mike Templeton (extension 541).
cc: Central Files
Washington Regional Office, Water Quality Section
NPDES Unit Files
Sincerely,
ii"."1( Preston Howard, Jr., P.E.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
November 10, 1999
Mr. Mike Taylor
Town of La Grange
P.O. Box 368
La Grange, North Carolina 28551
A7A
NCDENR
Subject: Authorization to Construct
ATC No. 021644ACC
NPDES Permit No. NC0021644
La Grange WWTP
Lenoir County
Dear Mr. Taylor:
The Division of Water Quality's NPDES Unit has reviewed your request for an Authorization to
Construct nitrogen control improvements at the La Grange WWTP. The Division finds the proposed
design to be satisfactory and hereby grants authorization for the following:
• installation of two (2) submersible velocity mixers in each of the existing oxidation
ditches (4 mixers total); and
• construction and installation of all related structures, piping, monitoring systems and
controls, and other appurtenances as specified in the design documents.
These improvements do not affect the approved design capacity of the treatment facilities, which shall
remain at 0.75 MGD.
The Division supports La Grange's efforts to provide additional nutrient removal capability at its
wastewater treatment facility. As you know, many other facilities in the Neuse River Basin face the same
challenge. It will take a concerted effort by all of the Neuse River dischargers to establish effective
nutrient controls by 2003.
The Division expects that the Town will make significant progress toward its stated nutrient reduction
target with the proposed project. One concern is that the proposal does not identify what reductions the
improvements are designed to produce. Instead, the Town will take a phased approach to reaching its
nitrogen target, making continued improvements as needed to reach the target. The Division supports the
phased approach with the understanding that:
(1) additional improvements may still be necessary, depending on what discharge limits (if any)
may apply to the plant and how well the modified plant performs; and
(2) our support of the phased approach does not extend any compliance date for achieving
necessary nutrient reductions.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer Internet: http://h2o.enr.state.nc.us/

La Grange WWTP
NPDES Permit No. NC0021644
ATC No. 021644ACC
Page 2
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NC0021644 issued January 24, 1993, and shall be subject to revocation unless the wastewater treatment
facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0021644.
Additional Conditions
In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement wastewater treatment or disposal facilities.
The Permittee shall notify the Washington Regional Office, telephone number [phone], at least
forty-eight (48) hours in advance of operation of the installed facilities, so that an in -place inspection can
be made. Such notification to the regional supervisor shall be made during the normal office hours of
8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.
Upon completion of construction and prior to operation of the modified facility, the Permittee shall
provide the Division with a certification from a professional engineer certifying that the permitted facility
has been installed in accordance with the NPDES Permit, this Authorization to Construct, and the
approved plans and specifications. Mail the Certification to the NPDES Unit, 1617 Mail Service Center,
Raleigh, North Carolina 27699-1617
The Permittee shall employ a certified wastewater treatment plant operator to be in responsible charge
(ORC) of the wastewater treatment facilities. The operator must hold a certificate of the type and grade at
least equivalent to or greater than the classification assigned to the wastewater treatment facilities by the
Certification Commission. The Permittee must also employ a certified back-up operator of the
appropriate type and grade to comply with the conditions of Title 15A, Chapter 8G, .0200. The ORC of
the facility must visit each Class I facility at least weekly and each Class II, III, and IV facility at least
daily, excluding weekends and holidays; and must properly manage and document daily operation and
maintenance of the facility and comply with all other conditions of Title 15A, Chapter 8G, .0200.
The Operational Agreement between the Permittee and the Environmental Management Commission is
incorporated herein by reference and is a condition of this Permit. Noncompliance with the terms of the
Operational Agreement shall subject the Permittee to all sanctions provided by G. S. 143-215.6 for
violation of or failure to act in accordance with the terms and conditions of this Permit.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Water Quality in accordance with North Carolina
General Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from complying with any
and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies
(local, state, and federal) which have jurisdiction.

La Grange WWTP
NPDES Permit No. NC0021644
ATC No. 021644ACC
Page 3
The Permittee shall maintain a copy of the approved plans and specifications on file for the life of the
facility. One (1) copy of the approved plans and specifications is enclosed for your records.
If you have any questions about this Authorization to Construct, please contact Mike Templeton, at (919)
733-5083, extension 541.
Sincerely,
L02.
err T. Stevens
Director
Enclosures: Project Plans and Specifications
Engineer's Certification Form
cc: Mr. Morris Brookhart (w/ certification form)
Washington Regional Office, Water Quality
Technical Assistance and Certification Unit
Central Files
NPDES Unit Files

To: Permits and Engineering Unit
Water Quality Section
Attention: Mike Templeton
Date: 07/14/99
AUTHORIZATION TO CONSTRUCT
NPDES PERMIT
REPORT AND RECOMMENDATIONS
County: Lenoir County
ATC No. 0021644ACC
PART I - GENERAL INFORMATION
1. Facility and Address: Town of La Grange, Attn: Mike Taylor,
Town Manager, PO Box 368, La Grange, NC 228551
2. Date of On -Site Investigation: site visit not needed for this
report
3. Report Prepared by: Al Hodge
4. Contact Person and Telephone Number: Mike Taylor, 252-566-3186
5. Verified Discharge Point(s), List for all discharge points:
<
Latitude: 35°-18'-4' Longitude: 77°-46'-3
U.S.G.S. Quad Name: La Grange
6. Site size and expansion area consistent with application?
_X_ Yes No If No, explain:
7. Topography (relationship to flood plain included):
Flat, elevation 20-30 ft. msl
8. Location of nearest dwelling: 1500 feet southwest
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Existing treatment facility:
a.What is the current permitted capacity of the facility?
0.750 MGD
b.Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two- (2)
years: N/A
c.What is the actual treatment capacity of the current facility
(design volume)? 0.750 MGD
Authorization to Construct Staff Report
Version 10/92
Page 1

d.Please provide a description of existing or substantially
constructed wastewater treatment facilities: one Pista Vortex
grit removal, one mechanical screen, one bypass screen,
parshall flume, two oxidation ditches at 0.45 million gallon
each, three clarifiers 63,448 gallons each, lime feed system,
alum feed system, polymer feed system, three tertiary filters,
filter backwash pumps, filter backwash tank, chlorine feed,
chlorine contact tanks, dechlorination system, post aeration,
aerobic sludge digestion tank, stabilization lagoon used for
flow equalization, two sludge pumps, two lagoon supernatant
pumps, two surface ash pumps, two filter backwash pumps, four
raw ww and sludge recirculation pumps
2. Please provide a description of proposed wastewater treatment
facilities: two bridge mixers with DO probes
3. Residuals handling and utilization/disposal scheme: Presently
using lagoons as sludge holding. New NPDES permit is to have a
condition requiring a final disposal permit.
4. Treatment plant classification (attach completed rating
sheet): II BNR
5. SIC Code(s): 4952
Wastewater Code(s) of actual wastewater, not particular
facilities i.e., non -contact cooling water discharge from a
metal plating company would be 14, not 56.
PART III - EVALUATION AND RECOMMENDATIONS: It is recommended the
permit request be granted.
Signature of report preparer:�
&Water Quality Regional Engineer:
Date: 7/(51'7°
Authorization to Construct Staff Report
Version 10/92
Page 2