NC0020389_Permit Modification_20060120

Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
y Alan W. Klimek, P.E., Director
4Q
Division of Water Quality
January 20, 2006
Mr. Keith Langdon, Town Manager
Town of Benson
P.O. Box 69
Benson, North Carolina 27504
Subject: NPDES Permit Modification
Permit Number NCO020389
Town of Benson WWTP
Johnston County
Dear Mr. Langdon:
The Division sent the draft NPDES permit NCO020389 modification to public notice on November 23, 2005
and the public notice comment period has now ended.
In accordance with your permit modification request and our review, the Division is forwarding herewith a
modification to the subject permit. Enclosed please find the modified permit. This permit modification 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).
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 Mrs. Dawn Jeffries at telephone number
[phone], extension 595.
Sincerely,
f : Alan W. Klimek
Enclosure: Permit Modification
cc: Raleigh Regional Office, Surface Water Protection Section
Aquatic Toxicology Unit
NPDES Files
EPA Region 4
The Wooten Company
120 N. Boylan Avenue
Raleigh, NC 27603
Attn: Vance Brooks, P.E.
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-161 7 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

t Permit NCO020389
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 provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Water Quality '
Commission, and the Federal Water Pollution Control Act, as amended, the
Town of Benson
is hereby authorized to discharge wastewater from a facility located at the
Benson Wastewater Treatment Facility
770 Hannah Creek Road (south of I-95)
Four Oaks
Johnston County
to receiving waters designated as Hannah Creek in the Neuse River Basin in accordance with the
discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III
and IV hereof.
This permit shall become effective March 1, 2006.
This permit and authorization to discharge shall expire at midnight on April 30, 2008.
Signed this day January 20, 2006.. -
Alan W. Iftimek, P.E., D' ector
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO020389
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.
The Town of Benson is hereby authorized to:
1. Continue to operate an existing 1.5 MGD wastewater treatment facility consisting of
the following components:
• Bar screen
• Grit removal
• Parshall flume with flow measurement
• Influent screw pumps
• Three extended aeration/oxidation basins
• Four secondary clarifiers
• Tertiary filters
• Chlorine contact basin
• Dechlorination
• Post aeration
• Alum and lime storage/handling units,
• Aerated sludge lagoon
• Two stabilization lagoons (also act as influent flow storage)
• Lagoon effluent return pump station; and
This facility is located at the Benson WWTF off Hannah Creek Road in Four Oaks, Johnston
County.
2. Upon receiving an Authorization to Construct from the Division of Water Quality,
construct and operate a 1.9 MGD wastewater treatment system.
I
3. Operate facilities for reuse water of up to 0.02324 MGD in accordance with Non -
Discharge permit number WQ0022501.
4. Discharge wastewater from said treatment works at the location specified on the
attached map into Hannah Creek, classified C-NSW waters in Neuse River Basin.

t
Latitude: 35°23'21
Longitude: 78°30'29"
Quad #: F24NE .
Receiving Stream: Hannah Creek
Stream Class: C-NSW
Subbasin: 30404
NCO020389..
ToNvn of Benson
WWTP
Facility
Location`
o{/OyVW
SCALE 1:24000

Permit NCO020389
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS.
During the period beginning on the effective date of the permit and lasting until expansion above 1.5 MGD,
the Permittee is authorized to discharge 1.5 MGD of municipal wastewater from outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below: ;
mLIMITSs�1
z ,
-x%
Mea
RINGFtEQUIREMENTSt�
a Sam le "
p�
w� Sarnpfex
xk - ;
Mont 1 W FdWeekl
Y Y.r
+Daily
yremenb.
t...
CHARAGsF ERSTICSx �y
t:u, r .,:'_z
,Frequency
e.�T
T „�,
x
�,, Wcatron
- -_
s
Influent or
Flow
15 MGD
.
Continuous
Recording
Effluent
Total Monthly Flow (MG)
Monitor and Report
Monthly
Recorded or
Calculated
Effluent
Influent &
0 2
BOD, 5 day (20 C) [April 1-0October 31]
5.0 mg/I
7.5 mg/l
Daily
Composite
Effluent
BOD, 5 day (200C)2 [November 1—March
10.0 mg/1
15.0 mg/I
Daily
Composite
Influent
Effluent
31
Influent &
2
Total Suspended Solids
30.0 mg/I
45.0 mg/i
Daily
Composite
• Effluent
NH3 as N Aril 1— October 31
2.0 m /I
6.0 m /I
Daily
Composite
Effluent
NH3 as N rNovember 1— March 311
4.0 m /I
12.0 m /I
Daily
composite
Effluent
Daily
Grab
Effluent
Dissolved Oxygen3
Dissolved Oxygen
Variablel
Grab
U& D
Fecal Coliform(geometric mean
200/100 ml
400/100 ml
Daily
Grab
Effluent
Fecal Coliform (geometric mean) .
Variablel
Grab:
U& D
Total Residual Chlorine
17 /L
Daily
Grab
Effluent
TKN m /L 4
Monitor and Report -
Weekly
Composite
Effluent
NO2 + NO3 m /L 4
Monitor and Report
Weekly
Composite
Effluent
Total Nitrogen m /L 4
Monitor and Report
Weekly
Composite
Effluent
s
Monitor and Report(pounds/month)
Monthly
Calculated
Effluent
33,790 pounds/year
Annually
Calculated
Effluent
Total Nitrogen Load.
hos horus6
Total Phosphorus 6
2.0 mg/L (Quarterly Average)
Weekly
Composite
Effluent ..
Temperature °C
Daily
Grab
Effluent
Temperature (oC)
Variablel
Grab
U& D,.
Conductivity
Daily
Grab
Effluent
Conductivity
Variablel
Grab
U& D
Quarterly
Composite
Effluent
Chronic Toxici
Total Chromium
50 /I 1,022 /I
Weekly
Composite
Effluent
Total Nickel
88 /I 261 /I
Weekly
Composite
Effluent
Total Mercury
0.012 /I
Weekly
Grab
Effluent.
Total Copper
2/Month
Com osite
Effluent
Total Zinc
2/Month
Composite
Effluent
H
6.0 - 9.0 standard units
Dail
Grab
Effluent
Footnotes:
1. U: Upstream at the culvert on NCSR 1158. D: Downstream at (1) NCSR 1227 and (2) I-95 culvert. Stream samples shall be grab
samples collected 3/Week from June to September and 1 /Week during the remaining months of the year. Instream monitoring
is provisionally waived in light of the Permittee's participation in the Lower Neuse Basin Association. Instream
monitoring shall be conducted as stated in this permit should the Permittee end its participation in the Association.
2. The monthly average effluent BOD5 .and Total Suspended Solids concentrations shall not exceed 15% of the respective influent
value__(85%removal). --_---
3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/l..
4. For a given wastewater sample, Total Nitrogen = TKN + NO3-N + NO2-N where TKN is Total Kjeldahl Nitrogen, and NO3-N
and NO2-N are Nitrate and Nitrite Nitrogen, respectively. .
5. Total Nitrogen Load is the mass quantity of Total Nitrogen discharged in a given period of time. See A. (4). The annual TN Load
Emit shall become effective with the calendar year beginning on January 1, 2003. Compliance with this limit shall be d t rmined in
accordance with condition A. (5), Annual Limits for Total Nitrogen.
6. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during the calendar quarter
Qanuary-March, April June, July -September, October -December).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90%: January, April, July, and October [see condition A. (3)]. Toxicity monitoring shall
coincide with metals monitoring.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

ermrt 0020389.
Ae EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS.
During the period, beginning after expansion above 1.5 MGD and lasting until expiration, the Permittee is
authorized to discharge 1.9 MGD of municipal wastewater from outfall 001. Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENTSr�
�a
�=
?` i.� X; a , .._.
m MONITORINGsREQUtREMENTS
G ,
..
ARACTERISTICS .� .t:
.Fa-z�34rz.ae�verageAverageMax�mumR3
Cn ks
Monthlyapaily�
4r rY� l' s��y:.
Measurement
Wmj -reguencyPe��
`..k, 2 ,W
Sa fe -
Sam le
a�f _ocatton,
Flow
1.9 MGD
Continuous
Recording
Influent or
Effluent
Total Monthly Flow (MG) _
Monitor and Report
Monthly
Recorded or
Effluent
Calculated
BOD, 5 day (200C)2 [April 1-October 31]
5.0 mg/1
7.5 mg/I
Daily
Composite
Influent &.
BOD, 5 day (20oC)2 [November i-March
Effluent
31
10.0 mg/I
15.0 mg/I
Daily
Composite
Influent &
Effluent
Total Suspended Solids2.
30.0 mg/1
45.0 mg/1 .
Daily
Composite
Influent &
NH3 as N Aril 1- October 311
1.0 m /I
3.0 m /I
Daily
Composite
Effluent
Effluent
NH3 as N November 1- March 311
2.0 mg/1
6.0 m /l
Daily
Composite
Effluent
Dissolved Oxygen3-
Daily
Grab
Effluent
Dissolved Oxygen
1
Variable
Grab
U& D .
Fecal Coliform (geometric mean
200/100 ml
400/100 ml
Dail
Grab
Effluent
Fecal Coliform (geometric mean)
Variable'
Grab
U& D
Total Residual Chlorihe .
17 /L
Dail
Grab
Effluent
TKN m /L 4>.
Monitor and Report
Weekly
Composite
.
Effluent
NOz + NO3 m /L 4
Monitor and Report
Weekly
Composite'
Effluent
Total Nitro en m /L a
Monitor and Report :
Weekly
Composite
Effluent
s
Total Nitrogen Load
Monitor and Report (pounds/month)Month'
Calculated
Effluent
33,790 pounds/year
Annual'
_
Calculated
Effluent
Total Phosphorus
2.0 mg/L (Quarterly Average)
Weekly
Composite
Effluent
Temperature oC
Daily
Grab
Effluent
Temperature (oC)
Variable'
Grab
U& D
Conductivity
Daily
Grab
Effluent
Conductivity
Variable'MGrab
U& D
Chronic ToxicityQuarterly
Effluent
Total Chromium
50 g/1 1,022 /1
WeeklyComposite
Effluent
Total Nickel
88 /I 261 /I
WeeklyComposite
Effluent
Total Mercury0.012
/I
Weekly
Effluent .
Total Co er .
2/Month
Effluent
Total Zinc
2/Month
Effluent
H
6.0 - 9.0 standard units
Dail
Grab
Effluent
r.00tnotes:
'1. U: Upstream at the culvert on NCSR 1158. D: Downstream at (1) NCSR 1227 and (2) I-95 culvert. Stream samples shall be grab
samples collected 3/Week from June to September and 1/Week during the remaining months of the year. Instream monitoring
is provisionally waived in light of the Permittee's participation in the Lower Neuse Basin Association.' Instream
monitoring shall be conducted as stated in this permit should the Permittee end its participation in the Association.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent.
value (85% removal).
3._. The -daily average dissolved ofygen effluent concentration shall not be less than 6.0 mg/l..
4. For a given wastewater sample, Total Nitrogen = TKN + NO3-N + NO2-N where TKN is Total Kjeldahl Nitrogen, and NO3-N
and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
5. Total Nitrogen Load is the mass quantity of Total Nitrogen discharged in a given period of time. See A. (4). 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 condition A. (5), Annual Limits for Total Nitrogen.
6. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during the calendar quarter
Qanuary-March, April June, July -September, October -December).
7. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90%: January, April, July, and October [see condition A. (3)]. Toxicity monitoring shall
coincide with metals monitoring.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO020389
A. (3) 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 90%.
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 subsequentversions 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 January, April, July and October. 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:
NC DENR / DWQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch
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 Branch 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,Ahis permit. -may be -- ---
re-opened and modified to include alternate monitoring requirements or limits.
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 NCO020389
A. (4) CALCULATION OF TOTAL NITROGEN LOADS:-;
a- The Permittee shall calculate monthly and annual TN Loads as follows:
L Monthly TN Load (pounds/month) = TN x TMF x 8.34.
where:
TN the average Total Nitrogen 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 (mglL x MG) to pounds
ii. Annual TN Load (pounds/year) Sum of the 12.Monthly TN Loads for the
calendar year
b. The Permitte'e 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. (5) 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:.
1.. the Permittee's annual TN Load is less than or equal to said limit, or
ii. the Permittee is a Co-Permittee Member 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 Permittee'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:
NCDWQ / NPDES Unit .
Attn: Neuse River Basin Coordinator '
Mail Service Center .
Raleigh, NC 27699-1617
a. 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.
H. Association roster(s) and members' TN allocations will be updated annually and
in accordance with'state and federal program requirements:

Permit NCO'020389
A. (7) `.EFFLUENT POLLUTANT SCAN.
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table. The
analytical methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to
determine whether parameters are present in concentrations greater than applicable standards and
criteria. Samples shall represent seasonal variations. Unless otherwise indicated, metals shall be
analyzed as "total recoverable."
Ammonia (as N)
Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
. Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalene
Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachloroethylene
Di-n-oclyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1,1,1-tnchloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-tdchloroethane
1,3-dichl obenzene
Chromium
Trichloroethylene
1,4-dichlorobenz ne e
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury
P-chloro-m-creso
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene .
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydrazine
Thallium
4,6-dinitro-o-cresol
Fluoranthene '
Zinc
2,4-dinitr6phenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Volatile organic compounds:
Pentachlorophenol
Hexachlorocycloo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-tnchlorophenol
Indeno(1,2,3-cd)pyrene
Benzene
Base -neutral compounds:
Isophorone -
Bromoform
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene .
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodimethylamine
Chloroethane
Senzo(a)anthracene
N-nitrosodiphenylamine .
2-chloroethyNinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene '
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-trichlorobenzene
. 1,1-dichloroethane _ _ _ _ _ _ _
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
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.

DENR/ DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES Permit NCO020389
Facility Information
Applicant/Facility Name:
Town of Benson/Benson WWTP
Applicant Address:
P.O. Box 69, Benson, North Carolina 27501
Facility Address:
770 Hannah Creek Road; Four Oaks, North Carolina 27524
Permitted Flow
1.5 MGD expanding to 1.9 MGD
Type of Waste:
domestic (70%) and industrial (30%) with pretreatment program;
Facility/Permit Status:
Class IV /Active; Expansion
County:
Johnston County
Miscellaneous
Receiving,Stream:
Hannah Creek
Regional Office:'
Raleigh
Stream Classification:.
C-NSW
State Grid /.USGS Quad:
F24NE/Benson, NC
303(d) Listed?
yes-
Permit Writer:
Dawn Jeffries
Subbasin:
03-04-04
Date:
November 17, 2005
Drainage Area (miz):.
10.5
Lat. 35° 23' 22" N Long. 78° 30' 03" W
Summer 7Q10 (cfs)
0.0
Winter 7Q1.0 (cfs):
0.0
30Q2 (efs)
0.075
Average Flow _(cfs):
12.0
IWC (%):
100%
SUMMARY OF FACILITY INFORMATION AND WASTELOAD ALLOCATION
The Town of Benson WWTP currently has a permitted flow of 1.5 MGD to serve its
3,232 customers, and is requesting an expansion to 1.9 MGD. Average flow in 2004
was 76% of permitted flow. The town is requesting this expansion based upon its own
20-year projected growth and its agreement with Johnston County to provide
wastewater treatment to the Four Oaks area, which is currently not serviced. The
Raleigh Regional Office has reviewed and commented on the Alternatives Analysis,
and does not object to the request. The Division has determined that the proposed
expansion is necessary to accommodate social and economic growth in the area and
that it will not result in contravention of surface water quality standards or loss of
designated uses in the receiving stream.
This facility discharges to Hannah Creek, classified C-NSW in subbasin 03-04-04 of
the Neuse River Basin. This portion of Hannah Creek is impaired due to dissolved
oxygen. At the time of the last renewal in late 2003, downstream oxygen levels were
noted to be lower than the standard (5.0 mg/L) nearly half the time. However, no
upstream data was available, and the facility's effluent DO levels were consistently
above 7 mg/L. Average effluent BOD levels were 3 mg/L and average ammonia levels
were 0.66 mg/L. It should also be noted that the area is somewhat swamp -like even
though it is not classified as such. In light of the available information, the permit
was renewed and an additional upstream monitoring station was added, which is
covered by Lower Neuse Basin Association. Data gathered will be evaluated by the
Division to determine what additional measures should be taken.
Limits for BODs and NH3-N for this expansion were developed based upon not
increasing the ultimate BOD loading in the receiving water, as it is impaired for DO.
Current ultimate BOD loading @ 1.5 MGD with 5/2 limits totals 237.69 lbs/day.
Ultimate BOD loading @ 1.9 MGD with 5/ 1 limits totals 229.77 lbs/day.
Fact Sheet
NPDES NCO020389 Renewal
Page 1.

Existing Effluent Limits () 1.5 MGD
Qw = 1.5 MGD
BOD5 = 5 mg/l (summer); 10 mg/l (winter)
NH3 = 2 mg/l (summer); 4 mg/l (winter)
TSS = 30 mg/l
DO = 6 mg/l (summer)
Fecal Coliform = 2 0 0 / 100 ml
Total Residual Chlorine = 17 µg/1
Total Nitrogen = 33,790 lbs/yr
Total Phosphorus = 2.0 mg/L (quarterly average)
Total chromium = 50 µg/L
Total Nickel = .88 µg/ L
Total mercury = 0.012 µg/ L
pH = 6.0 - 9.0 standard units
Recommended Effluent Limits (a) 1.9 MGD
Qw = 1.9 MGD
BOD5 = 5 mg/l (summer); 10 mg/l (winter)
NH3 = 1 mg/l (summer); 2 mg/1 (winter)
TSS = 30 mg/l
DO = 6 mg/l
Fecal Coliform = 200/ 100 ml
Total Residual Chlorine = 17 µg/1
Total Nitrogen = 33,790 lbs/yr
Total Phosphorus = 2.0 mg/L (quarterly average)
Total chromium = 50 µg/L
Total Nickel = 88 µg/ L
Total mercury = 0.012 µg/L
pH = 6.0 - 9.0 standard units
TOXICITY TESTING
Current Requirement (for 1.5 MGD): Chronic Toxicity (Ceriodaphnia) P/F @ 90%;
January, April, July, October
Recommended Requirement (for 1.9 MGD): Chronic Toxicity (Ceriodaphnia) P/F @
90%; January, April, July, October
COMPLIANCE SUMMARY
The facility has passed all toxicity tests since 2001, and has had two limits violations
in 2004/2005; one for BOD in 2005 and one for flow in 2004.
PROPOSED CHANGES
• Increase flow limit from 1.5 MGD to 1.9 MGD
• Reduce ammonia limits to 1 mg/L (summer) and 2 mg/L (winter) at higher flow
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
November 23, 2005
January 16, 2006
Fact Sheet
NPDES NCO020389 Renewal
Page 2

NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached
permit, please contact Dawn Jeffries at [phone] ext. 595.
NAME: DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR:
DATE:
Fact Sheet
NPDES NCO020389 Renewal
Page 3

REGIONAL OFFICE COMMENTS
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Fact Sheet
NPDES NC}020389 Renewal
. Page 33

T � W
o
Q
0
��~rq4 PRO'i"� 2
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
DEC 0 8 2005
Ms. Dawn Jeffries
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permit
Benson WWTP- Permit No. NCO020389
Dear Ms. Jeffries:
In accordance with the EPA/NCDENR NPDES MOA, we have completed review of
the draft permit specified above and have no comments or objections to its conditions. We
request that we be afforded an additional review opportunity only if significant changes are
made to the draft permit prior to issuance or if significant comments objecting to it are
received. Otherwise, please send us one copy of the final permit when issued.
If you have any questions, please call me at [phone].
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, & Technical Assistance Branch
Water Management Division
Intemet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable 01 Based Inks on Recycled Paper (Minimum 30% Postconsumer)

AFFIDAVIT OF PUBLICATION
NORTH CAROLINA.
PUBLIC NOTICE Fake County.) Ss.
STATE OF
ENVTH CANA
IRONMENTAL
C�WOIISSIO
NPDIES UNIT -
7 MAIL
SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF
INTENT
A NTOSUE
IS
WASTEWATER PERMIT
On the basis of Thorough staff
review and application of NC
General5tndtlawful.Wgn anoher
Elimination system
(NPDES) wastewater dis-
charge permit to the per-
sons) listed below effective
45 days from the publish date
of this notice. -
Written comments regarding
the proposed Permit will be
Quality may
a public meet-
oposed permit
(sion receive a
aree of public
Copies of the draft permit and
other supporting information
on file used to determine con-
ditions Present in the draft
permit are available upon re -
costs ofndrep oduct on. fthe
Ma
comments and/or request for
information to the NC Divi.
sion of Water Quality at the
above address or call, the
Before the undersigned, a Notary Public of Chatham
County North Carolina, duly commissioned and authorized to
administer oaths, affirmations, etc., personally appeared
Donna Clayton, who, being duly sworn or affirmed, according
to law, doth depose and say that she is Billing Manager -Legal
Advertising of The News and Observer a corporation
organized and doing business under the Laws of the State of
North Carolina, and publishing a newspaper known as The
News and Observer, in the City of Raleigh , Wake
County and State aforesaid, 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 I-
597 of the General Statutes of North Carolina, and that as such
she makes this affidavit; that she is familiar with the books,
files and business of said corporation and by reference to the
files of said publication the attached advertisement for NC
DIVISION OF WATER QUALITY was inserted in the
aforesaid newspaper on dates as follows: 11/25/05
Account Number: 73350831
the hours of o:oo a.m. ano
5.00 p.m. to review informs-
tion on file.
The Town of Benson (NPDES
Permit NC0020389) has ap-
' • .�1,
plied for expansion of its per-
mit discharging to Hannah the above is correctly
Neuse River Ba-
copied from the books and files of the aforesaid Corporation and publication.
Creek in the
sin. Currently, BOD, ammo-
nia nitrogen, total residual
chlorine, total nitrogen, total
phosphorus, chromium, nick.
el and mercury arewa er
quality limited. This dis-
charge may affect future al- I
locations in the receiving
stream.
Weyerhaeuser Company.
U..f AAnin Cf� F.Iemlan.
N&O: November 25, 2005
_........._......la_ _..................._.___...---.._....._
Billing Manager -Legal A rtising
Sworn or affirmed to, and subscribed before me, this
28 day of NOVEMBER , 2005 AD
In Testimony Whereof, I have hereunto set my hand
and affixed my official seal, the day and year aforesaid.
..._.........- _._.....___......_...
Notary Public
My commission expires I of March 2009.

Draft Permit Revigw(2)
Subject: Draft Permit Review(2)
Date: Tue, 20 Dec 2005 11:30:21 -0500
From: John Giorgino <[e-mail]>
To: Dawn Jeffries <[e-mail]>
Hi Dawn, I have reviewed the following:
NCO020389 Town of Benson - no comments
NC0004618 Alamac-Lumberton WWTP - no comments
Thanks for forwarding them.
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: [e-mail]
Web Page: http://www.esb.enr.state.nc.us
I of 1 12/20/2005 12:38 P1V

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Message -ID: <[e-mail]>
Date: Fri, 03 Jun 2005 13:01:21 -0400
From: Barry Herzberg <[e-mail]>
User -Agent: Mozilla Thunderbird 0.5 (Windows/20040207)
X-Accept-Language: en -us, en
MIME -Version: 1.0
To: Zi-giang Chen <[e-mail]>,
Ken Schuster <[e-mail]>
CC: Jay Zimmerman <[e-mail]>
Subject: Town of Benson PER
Content -Type: text/plain; charset=ISO-8859-1; format=flowed
Content -Transfer -Encoding: 7bit
Zi-Qiang:
RRO-SWP has reviewed the PER for the Town of Benson as per your request
dated May 12, 2005.We offer the following comments:
1) Page 13, article 3.2.4: As a matter of information, a permit
modification has been issued to Johnston County to send 150,000 gpd from
Four Oaks to Benson (WQ0019649). The addition of this flow to the
average WWTP flow in 2004 would put the facility at 86% of capacity.
There are no other significant permits not yet tributary to the WWTP.
2) The topographic maps included in the PER of the general area are
outdated. Interstate 40, which passes between the Town.and the WWTP, is
not shown. The area topography has been altered by the I-40
interchange. See also item 3, next.
3) Page 56, article 7.3.4.4: Current topo maps indicate the area
surrounding the plant on the east, south and west sides is wetlands,
marshlands and/or swamplands, contrary to the statement made in the PER.
4) Page 57, article 7.3.4.10: Similar to item 3 above, current topo
maps contradict the statement made in the PER regarding
marshlands/swamplands.
5) Page 63, article 7.3.8: It should be noted that the Town is
responsible for obtaining any and all permits required, not just those
mentioned in the PER.
Feel free to call if I can offer any other info. I hope to be doing a
recon inspection in Benson next week or two, and will advise if I see
anything .
Barry

Michael F. Easley, Governor
William 0. Ross..lr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Memorandum
To: Mark Hubbard
From: Barry Herzberg
Through: Ken Schuster
Date: November 7, 2005
Subject: Authorization to Construct
Town of Benson WWTP
NCO020389
Johnston County
The Raleigh Regional Office has completed its' review of the specifications submitted with your request
of October 19, 2005, and offers the following comments: Note that our review does not include standard
terms and conditions. Also, we will provide comments on plans separately from this letter, as we are not
yet in receipt of construction drawings.
The Raleigh Regional Office several months ago commented on the outdated topographic maps
included in the PER that did not accurately reflect the existing conditions around the treatment
facility. As we noted in that review, the area topography has been significantly altered due to the
Interstate 40 - Interstate 95 interchange which was not shown on the submitted topo maps.
Current topo maps indicate areas close to the proposed construction might be wetlands and/or
swampland, and we feel it would be appropriate for the engineer to provide updated comments
regarding area topography.
2. Spec section 01312, article 1.01 A: This article makes reference to this section of the
specification covering admin and supervisory personnel, general installation provisions and
cleaning and protection. The articles that follow, however, cover contractor responsibilities,
admin procedures and conservation.
3. Spec section 01330, article 1.04 H: O&M manuals should also be provided on CD or DVD.
The RRO will provide comments on plans after receipt.
Please advise if we can provide any additional information.,
NorthCarolina
Naturally
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-1628 FAX [phone]
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper

Instream DO data
Subject: Instream DO data
Date: Thu, 08 Dec 2005 09:58:20 -0500
From: Dawn Jeffries <[e-mail]>
Organization: NC DENR DWQ
To: Mitch Hayes <[e-mail]>
Mitch,
As I have been writing the permit for Benson's expansion, I have gotten
the instream DO data both upstream and downstream from their discharge
in Hannah Creek.
As far as this permit goes, the data probably won't make much
difference. That is because the ultimate BOD loading in the creek is
actually less with the tighter ammonia limits that go along with the
expansion.
However, I thought you might want to see this and maybe check it out.
The downstream DO levels are sometimes extremely low (below 1 even)
which makes me wonder what's going on...
Hope it helps...
Dawn
Name: instream data.xls
eta instream data.xls Type: EXCEL File (application/msexcel)
Encoding: base64
Download Status: Not downloaded with message
f of 1 12/8/2605 1:51 PI\

c (151K- �AVD6L�JtJsVAM
49CATION Date DOxygen_: DOxygen_300
HANNAH CF 8/25/2005 5.1 2.4
HANNAH CF 8/13/2005 4.2 3.9
HANNAH CF , 7/20/2005 5.2 5.5', STi� Y� 'l� S(� l r5is (4661� Cis m%�s
HANNAHCF 7/9/2005 4.8 1.2 11` �� tT�,►��""��P��'
HANNAH CF 6/29/2005 5.3 5.6 /y p r�
HANNAH CF 6/11/2005 4.4 0.7 �()�i '�1 h $ l T�°� ( Ok SI . I ZZ / 6�e `f I
HANNAH CF 5/31/2005 5.5 . 5.7rj � /,�
HANNAH CF 5/28/2005 4.3 1.7+ � p �Y�$ S l (�cr j�.l CriJ rl 6 r' F t /v r04/) (,ems 0Q ivw -k C k LPn�
HANNAH CF 4/20/2005 6.6 6.8
HANNAH CF 3/30/2005 7.2 7.9
HANNAH CF 2/23/2005 8 8.7
HANNAH CF 1/19/2005 10.8 10.2
HANNAH CF 12/8/2004 6.4 7.2 /
HANNAH CF 11/10/2004 7.9 7.2
HANNAH CF 10/20/2004 6.7 2.4(
HANNAH CF 9/19/2004 5.6 3.6�
HANNAH CF 9/15/2004 5.3 5.6 ✓ J[ �� �y( ;G( �7 %(/ 3
HANNAH CF 8/21/2004 4.5 0.7
HANNAH CF 8/18/2004 5.3 5.5
HANNAH CF 7/21/2004 5.2 5.4
HANNAH CF 7/4/2004 6 3 4j /
HANNAH CF 6/27/2004 7.4 2.4 �/'�� / d -`7 S
HANNAH CF 6/16/2004 7.6 8.1 `
HANNAH CF 5/27/2004 7.1 7.8
HANNAH CF 5/22/2004 4.2 0.9 _ O 3 1 e
HANNAH CF 4/21/2004 8.4 8.7 p /
HANNAHCF 3/31/2004 10:3 10.6 "�
HANNAH CF 2/25/2004 10.2 9.7 ( S r t�afLvU�✓✓li�
HANNAH CF- 1/18/2001.7
HANNAH CF 12/18/2003 11.2
HANNAH CF 11/12/2003 9.4
HANNAH CF 10/22/2003 8'.5 / i�� t f Ue' ✓t y / 5 c(2P�r /� vLa�L e- ' " �� '
HANNAH CF 9/17/2003 9.5
HANNAH CF 9/3/2003 6.6
HANNAH CF 8/20/2003 5.6 �� d( C % �n'I►r `C �/
HANNAH CF 8/6/2003 4.9 I
HANNAH CF 7/9/2003 6//� (co', �\ �O�
HANNAH CF 7/2/2003 6.2 �% �-/ rC
HANNAH CF 6/26/2003 1.1
HANNAH CF 6/19/2003 7.6 i 1-1 ✓I D f �d ss i j � ,
HANNAH CF 5/22/2003 8.4
HANNAH CF 5/16/2003 2
HANNAH CF 4/23/2003 9.9
HANNAH CF 3/12/2003 9.6 C1 G�TtX, 17 �t c�nclUs i
HANNAH CF 2/26/2003 10.1
HANNAH CF 1/22/2003 9.1
HANNAH CF 12/16/2002 9.3
HANNAH CF 11/22/2002 4.5
HANNAH CF 10/4/2002 1
HANNAH CF 9/23/2002 0.9
HANNAH CF 9/11/2002 0.5
HANNAH CF 8/23/2002 4.99
HANNAH CF 8/9/2002 3.63 ^^�
HANNAH CF 7/16/2002 2.8 f+alv l� • ' [�'E�'�'G,/ ��+i "l?%� `tGG�Ci [ 5 r /��' "u �p"" "L
HANNAH CF 7/9/2002 3.7
HANNAH CF 6/21 HANNAH CF /2002 7.9
HANNAH CF 5/23/2002 5.3
HANNAH CF 5/10/2002 5.7 /'►1`
HANNAH CF /1/2002 5.6
3
HANNAH CF /19/2002 5.8
HANNAH CF 2/12/2002 7.2 �/ 4
HANNAH CF 1/9/2002 7.9
HANNAH CF 12/4/2001 1.7
HANNAH CF 11/12/2001 3.1 CA�P�
HANNAH CF 10/8/2001 3.8
HANNAH CF 9/21/2001 2.6
HANNAH CF /2001 1.7/1i�c
HANNAH CF 8/21/21/2001 0.8- (/ 4HANNAH CF 8/7/2001 1.3HANNAH CF 7/13/2001 2 HANNAH CF 7/5/2001 2.5HANNAH CF 6/20/2001 2'"
HANNAH CF 6/7/2001 3.9
HANNAH CF 5/17/2001 4.5
HANNAH CF 5/2/2001 7.7
HANNAH CF 4/13/2001 5.1
HANNAH CF 3/27/2001 10.6
HANNAH CF 2/22/2001 6.7
HANNAH CF 1/24/2001 8.5
HANNAH CF 12/12/2000 6.4
HANNAH CF 11/7/2000 4.3
HANNAH CF 10/19/2000 4.2
HANNAH CF 9/20/2000 2.5
HANNAH CF 9/13/2000 1.5
HANNAH CF 8/25/2000 2.4
HANNAH CF 8/9/2000 1
HANNAH CF 7/25/2000 3.9
HANNAH CF 7/12/2000 3.3

HANNAH CF
6/27/2000
2.7
HANNAH CF
6/9/2000
3.9
HANNAH CF
5/24/2000
3.1
HANNAH CF
5/11/2000
0.1
HANNAH CF
4/6/2000
5
HANNAH CF
3/10/2000
7.4
HANNAH CF
2/9/2000
9.3
HANNAH CF
1/6/2000
6.6
HANNAH CF
12/9/1999
6.5
HANNAH CF
11/11/1999
4.5
HANNAH CF
10/26/1999
4.1
HANNAH CF
10/12/1999
2.5
HANNAH CF
9/28/1999
3.8
HANNAH CF
9/9/1999
0.7
HANNAH CF
8/19/1999
0.5
HANNAH CF
8/5/1999
0.5
HANNAH CF
7/22/1999
0.5
HANNAH CF
7/8/1999
0.5
HANNAH CF
6/23/1999
0.6
HANNAH CF
6/2/1999
0.7
HANNAH CF
5/18/1999
2.4
HANNAH CF
5/4/1999
3.4
HANNAH CF
4/15/1999
4.2
HANNAH CF
3/2/1999
6.2
HANNAH CF
2/4/1999
4.6
HANNAH CF
1/6/1999
8.9
HANNAH CF
12/8/1998
1.5
HANNAH CF
11/3/1998
1.7
HANNAH CF
10/13/1998
1.2
HANNAH CF
8/18/1998
0.5
HANNAH CF
8/4/1998
0.5
HANNAH CF
7/21/1998
4
HANNAH CF
7/7/1998
1.3
HANNAH CF
6/16/1998
4.4
HANNAH CF
6/2/1998
7.7
HANNAH CF
5/19/1998
6
HANNAH CF
5/5/1998
5.8
HANNAH CF
4/3/1998
6.2
HANNAH CF
3/5/1998
11.4
HANNAH CF
2/9/1998
10.5
HANNAH CF
1/6/1998
12.2
HANNAH CF
12/4/1997
8.9
HANNAH CF
11/5/1997
3.8
HANNAH CF
10/8/1997
1.8
HANNAH CF
9/17/1997
1.4
HANNAH CF
9/4/1997
0.8
HANNAH CF
8/14/1997
0.6
HANNAH CF
8/5/1997
1.5
HANNAH CF
7/11/1997
0.5
HANNAH CF
7/2/1997
3.5
HANNAH CF
6/12/1997
4
HANNAH CF
6/4/1997
2.2
HANNAH CF
5/19/1997
2.4
HANNAH CF
5/7/1997
6
HANNAH CF
4/2/1997
6.2
HANNAH CF
3/5/1997
8.5
HANNAH CF
2/5/1997
7.2
HANNAH CF
12/12/1996
7.2
HANNAH CF
11/15/1996
7.8
HANNAH CF
10/10/1996
5.6
HANNAH CF
8/19/1996
5.6
HANNAH CF
8/7/1996
5.3
HANNAH CF
7/14/1996
6.4
HANNAH CF
7/3/1996
32
HANNAH CF
6/15/1996
6.6
HANNAH CF
6/5/1996
3.8
HANNAH CF
5/18/1996
7
HANNAH CF
5/8/1996
7.8
HANNAH CF
4/3/1996
11.2
HANNAH CF
3/6/1996
8
HANNAH CF
2/8/1996
11.8
HANNAH CF
1/5/1996
9.6
HANNAH CF
12/6/1995
8.2
HANNAH CF
11/10/1995
7.8
HANNAH CF
10/4/1995
4
HANNAH CF
9/21/1995
3
HANNAH CF
9/13/1995
3
HANNAH CF
8/16/1995
3.8
HANNAH CF
8/2/1995
1.8
HANNAH CF
7/21/1995
1.2
HANNAH CF
7/12/1995
2
HANNAH CF
6/20/1995
7.5
HANNAH CF
6/7/1995
4.6
HANNAH CF
5/22/1995
7.9
HANNAH CF
5/8/1995
6.8
HANNAH CF
4/8/1995
7.2
HANNAH CF
3/10/1995
9.8
HANNAH CF
2/2/1995
10.2
HANNAH CF
1/10/1995
2.6
HANNAH CF
12/5/1994
4.4

SEP-29-2005 13:32 FROM:THE WOOTEN COMPANY 919 8343589 TO:9197330719
)ZOUR OAKS/BENSON INTERCONNECTOR AND TOM'N 01; BENSON
0.4 MC:D WWTP EXPANSION INTER-LOC'Ai, AGREEMENT
- r r f!.
THIS ACTFEMENT (the "Agreernent") is entered into as of tile) l.`' day of May
2005 by and between Jo1111S1u1t C:oiutty, the 'Town of Benson and the 7 own of Clayton,
No11h Carolina. j.
WITNESSETH
P.2/5
WHEREAS the Town ()f Clayton has purchased treatment capacity in tl')e. Johr]steln
County Central Wastewater Treatl,ient Plant (WWTP) and hati the need for an additional
trcatmenl capacity allocation; and
W 1-1IEREAS Johnston County's expanded WWTP will be a.11ocatcd at: 90% of its capacity
when it conjes on line in May of 2005, and the. County must initiate further expansion of
its wastewater treatment capacity; oud
WHEREAS the Town of Benson's wastewater treatment facility currently has surplus
treatment capacity and t.he'l�'own intends t. duct additional capacity, and that. it will
allow Jolutston County to purcha§e 0.150 mil if Johnston County WcatitirWater
transmission facilities are extended towof L3cnson's wastewater trc,,
t to on ni plant;
and
WHEREAS the 'Down of Benson will penult the C:ounty's iltitiul ternporary capacity
purchase to become permanent and desires to sell additional perlslanelit treatlr►eait
allocations whim its WWTP is expanded; and
Wlll!;REAS Johnston COU1.3ty has recelveil a $500,000 North Carolina Rural C(True)'
hconiomic Incentive Grant to corlShuut it Four Oaks to Benson wastewater force main
interco)ulector that will allow Johnston Caunly to transpoll waslewmer to tile 'i own of
Bensoia's WWTP for truatment; and
W11,VREAS ilic T own of Benson leas received a $425,000 North (_'aroll"Li Mural Center
f cont)trlic Incentive Gr::tnt to IncrViSC its WWTP capiicily by 0.4 tng(i to allow Johttstorl
C'ount.y to purchase :1 rennanenl t.rc atrrtettt. capacity allouation in thc expanded facility,
NOW, TI:IRREFORY, in conside)Jholl of the mutivil covenants and promises sel lorth
herein, Johnston County, thu Town of Benson and tau: ,yawn of (.` ayton hereby agrec as
iirllow:

SEP,-29-2005 13:32 FROM:THE WOOTEN COMPANY 919 0343589 TO:9197330719 P.3/5
AR'rIC'L1�, 1 T1,RM (�1' •a G]R EwNT AN)) `CFK.MINATInI\
1. 1'hc Town Of Clayton will purcl ase a i,arcit�l fcc of $k)UU,(lU0 an(iClol nst.on
t .150 nlbil -otrl )ohnstoil County fora cal. y
4ounty will allocate a capacity. of 0.150 nl�;d in its �'�u' fp f(tr use by tile.
Town of Claytira.
ls011
2. Johnston County will design and C.Onstts rt tll nipil►i tml rOvemc:nR".t
gTile
wastewater force, inain and colilnecessary y P
2UU OOU �Cxsloll
estimated cost of the projectis$1, ,=1 and c.ilnslntct a' 0.�+ ttiKil WWTP.
3. The Town of 13cnson will de .__ _-
4. Thr. 'Town of Bensnn will allocate a cal`aclty c( cost 11�0� treatment ill
shalt be`equal too
use by Johnston County. The cofee jO y
t1le bulk wastewater treatment fie Johnston County charges the Town of
Clayton and its other bulk. Customers. The cotnnli,dity cost. iS subject to
upward adjustment annually. The clir.Tent bulk commodity fee, charged by the
('ounty is $2.15 per 1,000 gallons.
5, fohnston County will pay thy. Town of Benson ice, in the atnuuntwill
S300,000 for the •150 0 )0 d wastewater ailocat.ion. Johnston County
pay a fee cafe $125,000- ':'ts a di post against It future wastewater capacity
allocation.
Y ill the.
6. T11e Town of Benson will sell additional capacity to .tollnstonVal11 ))(cost per
future. l'hc Town agl"ees to sell at least 150,000 gpd. 'fhe ut1 t i
gpd) of the Cuture wastewater 51 ocatirnl spa I be ncgoll:itcd butwccn the Town
of Benson and the County within 11111t1s of the th(:n current actual capital Gists
for wastewater plant expansions by the respcet.ive pau•ties.
�. Assigumcnt. "this Agreelncrlt shall insure to thc. bel"61t of and be. binding
upon the parties hereto and their resllcctivc heirs, executors, admssigilauhis
legal repruselltat'lves atld successors. Neither party ulay assign this
A�;reernent, or any of its rights or obligations hctcunder, without the prlul'
writt.c n c<msene of the other party auld any such slllelllplcd asstg111ni ul spat! hi
void, except that i it ler party ttlily :tsstlni this Agivelllc.tlt and/or any of its
rights and/or OW),gat.1oils hereunder, without tb(: other par y's consent, Upon
writ:tcn not.icE: to the: otller pally, tit any cotrlp�ny that at•quirc� gill, ur
substantially all, of the assets of the. party seeking to ))'Like the assil;nrllcnt..
�. Noli(.i When writtcll nolice is required by tills AgIven'1cnt, 1t shall be
cutlsidcrcil as served when do ivercd ul person ol: sent by l I.S. til:st-class mail
to the tcshec(ive n prescnlativr. of the parties 111 ttic following ad(lresscs, or
such subsc(luent ilddresscs l01 which Iloti -e is Liv111 1711f5Ut1111 to tl'ili Atticic:
hake, 2 of 4

.SEP,-29-2085 13:32 FROM:THE WOOTEN COMPANY 919 8343589 TO:9197330719 P.4/5
'TO T11L. C(.')uN'f Y:
rrlobttston County
Attn: lZtck J. l-lest.c1
P.O. Box 1049
Stnithlicld, N.(7 27577
V0 T1-1F'I,OWN OF BENSON'.
"yown of Be.11SOD
Attn: Keith l..angdon
P.O. Box 69
13cnson, N.C:. 27504
TO THE TOW N OF CL.AYTON:
Town of Claytcirt
Attn: Stevc; Biggs
P.U. Box 979
Clayton, N.C. 27520
9. Modification, Atncndment, Supplement or Waivcr. No ntoclitieation,
amendintnt, supplement to or waiver of this Abreimcttt or arty of its
provision,.; shall he binding i►pon the parties bc�t�eto unless made m writin.g and
duly signed by authorized representative~ of both poetic
10. ticverahility. In the event any one or snore of the provision of flee Agt'ectnthe
shall for ally _rettsrnti be head ;to be invalid, illegal or uncnforcuablc,
Tefflaming provisions of this Agmeinent shall be untiitpaircd, and the invalid,
be rcplaceil by � tttutually acceptable
Illegal or unenforceable provision shall
pl:oviSiult,
which being valid, legal, and cnlorccable comes closest to the
intention or orccah c
of the parties underlying, the invalid, illegal, uni n1
provision.
1 1 _ G'attirety of thc. Agreement. This AKdeS ll )r�'tou5' agreement,, included rromises
between the parties and-
ritten oral, bctwcen the panics with respect to
and representation, whether wor
the stilhjection matter hcre0f.
Pave 3 of 4

SER-29-2005 13:33 FROM:THE WOOTEN COMPANY 919 8343589 TO:9197330719
WHEREOF, t.Ile 11,,irlies hereto, ceachtinder due. and prol)cl'
i ris Of the dav, month, and year lust above
itithon
havc exc-tAlle'd kills A-91U-men ...•
7. day oWzv2005
,UC13 *Yll' i IS tilt!
written.
Attest: ,
()It, Deputy Clerk to the
Board ()fC0fTll11isSionCl'5
Attest'
Connie S01TcII
Benson "Mown Cicrk
Attest:
ShcrryScog I -S
ciaytoj, -town Clerk
JOHNSTON COUNTY
honorable Cookie: I.
jolulston County Board of (.0111rilissioncrs
T('WN OFBENSON
Hont. rul )IC I)o jild I.]. J01111SO11, Mayor
M a na ge r
-f 0 F CLAYT N
`0
C L
I 1c)"tn0-.)rjjbjc Jody McLeod, Mayor
-
nija 01
Pzigv 4 AA
P. 5/5

WArF9�G
� q
�? r
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Memorandum
To: Joe Corporon
From: Barry Herzberg
Through: Ken Schuster*"
Date: August 18, 2005
Subject: Town of Benson
NPDES Permit NCO020389
Preliminary Engineering Report and Alternatives Analysis
Johnston County
Joe
CG&L requested that RRO-SWP review the PER for the Town of Benson on May 12, 2005. We
have examined the contents of the documents and find that the PER/EA is as previously
submitted. On June 3, we provided CG&L with the following comments:
Page 13, article 3.2.4: As a matter of information, a permit modification has been issued
to Johnston County to send 150,000 gpd from Four Oaks to Benson (WQ0019649). The
addition of this flow to the average WWTP flow in 2004 would put the facility at 86% of
capacity. There are no other significant permits not yet tributary to the WWTP.
2. The topographic maps included in the PER of the general area are outdated. Interstate
40, which passes between the Town and the WWTP, is not shown. The area topography
has been altered by the 1-40 interchange. See also item 3, next.
3. Page 56, article 7.3.4.4: Current topo maps indicate the area surrounding the plant on
the east, south and west sides is wetlands, marshlands and/or swamplands, contrary to
the statement made in the PER.
4. Page 57, article 7.3.4.10: Similar to item 3 above, current topo maps contradict the
statement made in the PER regarding marshlands/swamplands.
5. Page 63, article 7.3.8: It should be noted that the Town is responsible for obtaining any
and all permits required, not just those mentioned in the PER.
NorthCarolina
Naturally
North Carolina Division of Water Quality Raleigh Regional Office Surface Water Protection Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 1628 Mail Service Center Raleigh, NC 27699-1628 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

To update our review, we would add the following comments:
6. Sewer extension permit WQ0019649, as mentioned in item 1 above, covers the Town of
Four Oaks to Benson force main and pump station. On June 15, 2005, we again
modified this permit to reduce the length of 12-inch force main. The permitted flow from
Four Oaks to Benson remains the same at 150,000 gpd. The Benson WWTP, including
the 150,000 gpd Four Oaks flow, is at 87% capacity on paper - - actual tributary flow is
75.6%, based on CY 2004. Actual flow for the 12 months ended June 2005 is down from
the 2004 annual, and would put the plant at 84.3% paper and 72.9% actual.
7. We failed to mention in our comments to CG&L that Hannah Creek, Benson's receiving
stream, is on the 303(d) list for aquatic life impairment, low DO.
We also briefly reviewed the NPDES Permit Application, and comment only that the topo
map is unacceptable - - the 1-40/1-95 interchange is less than a quarter mile from the plant,
and is not shown on the map!
Please advise if we can provide any additional information.
End
HAEAA Comments\Benson EA.doc

Section B - Chapter 4
Neuse River Subbasin 03-04-04
Hannah Creek and Mill Creek
CCCCCCCCCCCCCCCCCCCCCCCCCC-CCCCCCCCCCCCCCCCCCCCCCCCC,
4.1 Subbasin Overview
Subbasin 03-04-04 at a Glance
Land and Water Area
Total area:
277 miZ
Land area:
277 mil
Water area:
0 mil
Population Statistics
2000 Est. Pop.:
31,658 people
Pop. Density:
108 persons/miZ
Land Cover (percent
Forest/Wetland: 50.1
Surface Water: 1.1
Urban: 1.9
Cultivated Cropland: 45.9
Pasture/
Managed Herbaceous: 0.2
Counties
Johnston and Wake
Municipalities
Benson and Four Oaks
Population growth in this subbasin is concentrated on the
I-95 corridor between Benson and Smithfield. The
northern part of the subbasin is in agriculture land use.
There are 2,741 acres of managed public lands in this
subbasin mostly associated with Howell Woods at
Johnston Community College near the confluence with..,:
Hannah Creek and Mill Creek.
The Benson WWTP (1.5 MGD, map #87) is the only
NPDES wastewater discharge permitted in this subbasiri�"`'
(Figure B-4). There are no individual NPDES stormwater
permits in the subbasin. Refer to,Appendix I for
identification and more information on NPDES permit
holders. Wake County will be required to develop a
stormwater program under Phase „II (page 76). Johnston" "!
and Wake counties have submitted model stormwater
ordinances as required by the Neuse NSW strategy
stormwater rules (page 64). There are also 39 registered
animal operations in this subbasin.
There were two benthic macroinvertebrate community
samples (Figure B-4 and Table B-9) collected in 2000 as
part of basinwide monitoring. Both sites remained the
same. Refer to 2001 Neuse River Basinwide Assessment Report http://www.esb.enr.state.nc.us/bar.html
and Section A, Chapter 3 for more information on monitoring.
Use support ratings are summarized in Part 4.2 below. Recommendations, current status and
future recommendations for waters that were impaired in 1998 are discussed in Part 4.3 below.
Current status and future recommendations for newly impaired waters are discussed in Part 4.4
below. Water quality issues related to the entire subbasin are discussed in Part 4.5. Unless
otherwise noted, all discussions are for the aquatic life and secondary recreation use support
category. Refer to Appendix III for a complete list of monitored waters by use support category
and more information on supporting monitored waters.
Section B: Chapter 4 - Neuse River Subbasin 03-04-04 129

-1
WAKE
qquqy-;
vtieina
Angie
Legend
C) Subbasin Boundary
Ambient Monitoring Station
I -NBA Sites
Benthic Station
Fish Tissue Station
NPDES Discharges
Major
Minor
Use Support Rating
Supporting
Impaired
Not Rated
A/ No Data
/\. / County Boundary
I/V Primary Roads
CD, - Municipality
Fig,ute B-4 Neuse. River Subbasin
V
Rpn,q
JOHNSTON
0
u.
r
Newt(
ru
SAMPSON
: Ix.
5 0 5 10,1
ile
WAYNE
ARA
NCDENR
Planning Branch
QBasinwide PlannProktffm- 't—...
September 10, 26P2

Table B-10 DWQ Monitoring Locations in Subbasin 03-04-04
Benthic Macroinvertebrate Community Monitoring Sites
Map #`
Waterbody
County
Location
1995
2000
B-1
Mill Cr
Johnston
SR 1009
Good -Fair
Good -Fair
B-2
Hannah CrZ
Johnston
SR 1009
Good -Fair
Fair
B-2
Hannah CrZ
Johnston
SR 1009
Good -Fair
Fair
Ambient Monitoring Sites
Map #1
Waterbody
County
Location
Station #
Noted
Parameters'
A-14
Hannah Cr
Johnston
I-95
J5400000
DO
B = benthic macroinvertebrates; F = fish community; A = ambient monitoring station; SB = benthic macroinvertebrates special
study site; and SF = fish community special study site.
Z Historical data available at this site. Refer to Appendix II.
3 Parameters are noted if in excess of state standards in greater than 10 percent of all samples.
4 LNBA Sites (page 220). Only dissolved oxygen, chlorophyll a and fecal coliform were analyzed.
4.2 Use Support Summary
Use support ratings (page 54) in subbasin 03-04-04 Were assigned for aquatic life and secondary
recreation, fish consumption and water supply. All waters in the subbasin are considered
impaired on an evaluated basis because of fish consumption advisories (page 93). All water
supply waters are supporting on an evaluated basis based on reports from DEH regional water
treatment consultants.
There were 28.6 stream miles (12.5 percent) monitored during this assessment period.
Approximately 12 (43 percent) of the monitored stream miles are impaired. Refer to Table B-11
for a summary of use support ratings by use support category for waters in the subbasin. Use
support ratings for waters that were monitored and impaired in at least one use support category
or were impaired in 1998 are presented in Table B-12.
Section B: Chapter 4 - Neuse River Subbasin 03-04-04 131

Table B-11 Summary of Use Support Ratings by Use Support Category in Subbasin 03-04-04
Use Support
Rating
Basis
Aquatic Life and
Secondary
Recreation
Fish
Consumption
Primary
Recreation
Water
Supply
Supporting
Monitored
16.4 mi
0
0
0
All Waters
16.4 mi
0
0
4.7 mi
Impaired
Monitored
12.3 mi
0
0
0
1
All Waters
12.3 mi
227.1 mi
0
0
Not Rated
Monitored
0
0
0
0
No Data
N/A
198.5 mi
0
5.4 mi
0
Total
Monitored
28.6 mi
0
0
? :0
All Waters
227.1 mi
227.1 mi
5.4 mi
4.7 mi
Percent
Monitored
.12.5% mi
0%
0%
0%
Note: All waters include monitored, evaluated and waters that were not assessed.
Table B-12 Previously or Currently Impaired Waters in Subbasin 03-04-04
Name
1998
Status
2002
Status
Use Support
Category
Miles
Black Creek
Supporting
Impaired
Aquatic Life/Secondary Recreation
2.0
Hannah Creek
Supporting
Impaired
Aquatic Life/Secondary Recreation
10.3
Total 2002 Impaired Miles
12.3
4.3 Status. and Recommendations of Previously Impaired Waters
There were no impaired streams identified in the 1998 basin plan in this subbasin.
4.4 Status and Recommendations of Waters Newly Impaired Waters
4.4.1 Black Creek
Current Status
Black Creek (2.0 miles) from the dam at Holts Lake to the Neuse River is currently impaired
because dissolved oxygen was below 4 mg/l in 19 percent of samples.
Section B: Chapter 4 - Neuse River Subbasin 03-04-04 132

2002 Recommendations
DWQ and LNBA (page 220) will continue to monitor the site to detect any water quality
changes.
4.4.2 Hannah Creek
Current Status
Hannah Creek is currently supporting with a Good -Fair bioclassification at site B-2 from a 2001
resample. Low dissolved oxygen during summer months may be responsible for the
bioclassifcations dropping to Fair in the 2000 samples.
Upper Hannah Creek (10.3 miles) is currently impaired because dissolved oxygen (site A-1) was
below 4 mg/1 in 48 percent of samples. This segment includes the Benson WWTP discharge.
The Benson WWTP (map #87) has had past aquatic toxicity failures. Instream habitat is sparse
in the creek.
2002 Recommendations
DWQ and LNBA (page 220) will continue to monitor the site to detect any water quality
changes. DWQ will work with Benson to remedy toxicity problems and to determine the source
of low dissolved oxygen in Hannah Creek.
4.5 Status and Recommendations for Waters with Noted Impacts
The surface waters discussed in -this section are supporting designated uses (unless otherwise
noted) based on DWQ's use support assessment and are not considered to be impaired or were
monitored but not rated. However, notable water quality problems and concerns have been
documented for some waters based on this assessment. While these waters are not considered.
impaired, attention and resources should be focused on these waters to prevent additional
degradation or facilitate water quality improvement.
4.5.1 Mill Creek
Current Status and 2002 Recommendations
Mill Creek is currently supporting with a Good -Fair bioclassification at site B-1. There is
currently little development in this watershed and population density is 0-64 people/square mile.
The NCWRP has a project in this watershed (page 215) and has targeted this local watershed
(page 203).
Section B: Chapter 4 - Neuse River Subbasin 03-04-04
133

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