NC0020559_PERMIT ISSUANCE_20070815

NPDES ®OCUNENT SCANNING COVER SHEET
NPDES Permit:
NCO020559
Henderson WWTP
Document Type: I
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Speculative Limits
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
August 15, 2007
Whig document iS printed on reuse paper aazy
content oa the reverse Side

Michael F. Easley
©� A Governor
NCDENR William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
August 15, 2007
Thomas M. Spain, WWTP Director
City of Henderson
P.O. Box 1434
Henderson, North Carolina 27536-1434
Subject: Issuance of NPDES Permit NCO020559
Henderson Water Reclamation Facility
Vance County
Dear Mr. Spain:
The Division of Water Quality (the Division) hereby issues the attached NPDES permit for the subject
facility. We issue this permit 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.
The Division has reviewed your comments on the draft permit dated June 28, 2007 and have included your
requests and corrections. We have added no other corrections to the draft permit.
If any parts, monitoring frequencies, or sampling requirements contained in this permit are unacceptable, you
have the right to an adjudicatory hearing, upon written request, within thirty (30) days following receipt of
this letter. You must submit this request in the form of a written petition, conforming to Chapter 150B of the
North Carolina General Statutes, and file it with the office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit shall be final and
binding.
Please notice that this permit is not transferable except after notifying the Division. The Division may modify, or
revoke and reissue this permit. This permit does not affect your legal requirements to obtain other permits
required by the Division of Water Quality, the Division of Land Resources, the Division of Coastal
Management, or by other federal or local governments.
If you have questions, or if we may be of further service, please call Joe Corporon at [phone], extension
597 or email [e-mail].
Sincerely, /
.(�r: Coleel/1/i
Enclosure: NPDES Permit NCO020559
cc: Raleigh Regional Office/Surface Water Protection Section
CNPDES Program,lEast
Pretreatment Unit
Aquatic Toxicology Unit
Central Files
EPA Region 4
N. C. Division of Water Quality / NPDES Unit Phone: [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax: [phone]
Internet: h2o.enr.slate.nc.us DENR Customer Service Center: 1 800 623-7748

1'i�ii(�` 91111► 1111 ]
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
(NPDES)
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 Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended, the
City of Henderson
is hereby authorized to discharge wastewater from a facility located at the
Henderson Water Reclamation Facility
1646 West Andrews Avenue, Henderson
Vance County
to receiving waters designated as Nutbush Creek in the Roanoke River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, and III hereof.
The permit shall become effective October 1, 2007.
This permit and the authorization to discharge shall expire at midnight on March 31, 2012.
Signed this day August 15, 2007
' / - - _ V �.
r Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO020559
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this 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 described herein.
City of Henderson
is hereby authorized to:
1. continue to operate an existing 4.14 MGD wastewater treatment facility consisting of the following
wastewater treatment components:
■ Bar screen and grit chamber
• Primary clarifiers
• Trickling filters
• Secondary clarifiers
■ Pure oxygen activated sludge nitrification basin
• Final clarifiers
• Tertiary filters
• Post aeration
• UV disinfection with sodium hypochlorite backup
• Dissolved air flotation sludge thickening
• Pure oxygen aerobic digester
■ Anaerobic digesters
• Aerobic digester
• Sludge holding tank
• Sludge drying bed
located at the Henderson Water Reclamation Facility, 1646 West Andrews Avenue in Henderson,
Vance County, and
2. after receiving an Authorization to Construct permit from the Division of Water Quality, construct
and operate wastewater treatment facilities with an ultimate capacity of 6.0 MGD, and
3. discharge via Outfall 001 from said treatment works, at the location specified on the attached map,
into Nutbush Creek, a Class C waterbody located within the Roanoke River Basin.

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.City of Henderson
Henderson Water Reclamation Facility
Stale Grid/Quad: B 25 SW / Henderson Latitude: 36' 21' 01" N
Receivinp Stream: Nutbush Creek Longitude: 78' 24'40" W
Drainage Basin: Roanoke Sub -Basin: 03-02.06
Stream Class: C
Facility
Location
(map not to scale)
7DES Permit NCO020559
NORTHVance County

Permit NCO020559
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.14 MGD)
Beginning on the effective date of this permit and lasting until expansion above 4.14 MGD, the Permittee is
authorized to discharge treated wastewater from outfall 001. Such discharges shall be limited and monitored by
the Permittee as specified below:
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
PARAMETER
Monthly
Weekly
Daily
Measurement
Sample
Sample
Average
Average
Maximum
Frequency
Type
Location'
Flow
4.14 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 2
6.0 mg/L
9.0 mg/L
Daily
Composite
Influent and
(April 1- October 31)
Effluent
BOD, 5-day, 20°C z
12.0 mg/L
18.0 mg/L
Daily
Composite
Influent and
(November 1 — March 31)
Effluent
Total Suspended Solids 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and
Effluent
NH3 as N
3.0 mg/L
9.0 mg/L
Daily
Composite
Effluent
(April 1- October 31)
NH3 as N
6.0 mg/L
18.0 mg/L
Daily
Composite
Effluent
(November 1 - March 31)
Total Phosphorus
1.0 mg/L quarterly average
Weekly
Composite
Effluent
(April I- September 30) 3
Total Phosphorus
1.5 mg/L quarterly average
Weekly
Composite
Effluent
(October 1 - March 3 1)3
Total Residual Chlorine °
17 µg/L
Daily
Grab
Effluent
Fecal Coliform (geometric
200/100 ml
400/100 ml
Daily
Grab
Effluent
mean)
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Dissolved Oxygen
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Conductivity
Daily
Grab
Effluent
Total Nitrogen
_
Monthly
Composite
Effluent
(NOr+NO3+TKN)
Total Mercury'
0.012 µg/L
Weekly
Grab
Effluent
Total Zinc
2/Month
Composite
Effluent
Total Copper
2/Month
Composite
Effluent
Chronic Toxicity 6
Quarterly
Composite
Effluent
Notes:
1. See A. (3.) for instream sampling requirements.
2. The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the
respective influent value (i.e., 85% removal required).
3. The Permittee shall base Total Phosphorus compliance upon a quarterly average of weekly samples.
4. Chlorine monitoring and limit apply only if chlorine is added to the treatment system.
5. Sampling and analysis for mercury shall conform to analytical techniques specified in test method EPA
1631E.
6. Chronic Toxicity (Ceriodaphnia) at 90 % with testing in January, April, July and October [see A. (4.)].
7. Additional PPA and annual 2n1 Species testing is required by this permit [see Special Conditions A. (5.) and A. (6.)]
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit NCO020559
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (6.0 MGD)
Beginning upon expansion above 4.14 MGD and lasting until expiration, the Permittee is authorized to discharge
treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Weekly
Daily
Measurement
Sample
Sample
Average
Average
Maximum
Frequency
Type
Location'
Flow
6.0 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5-day, 20°C 2
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent and
(April 1- October 31)
Effluent
BOD, 5-day, 20°C
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent and
(November 1 — March 31)
Effluent
I
Total Suspended Solids 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and
Effluent
NH3 as N
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
(April I- October 3 1 )
NH3 as N
4.0 mg/L
12.0 mg/L
Daily
Composite
Effluent
(November 1 -March 31)
Total Phosphorus 3
0.5 mg/L quarterly average
Weekly
Composite
Effluent
Total Residual Chlorine a
17 µg/L
Daily
Grab
Effluent
Fecal Coliform (geometric
200/100 ml
400/100 ml
Daily
Grab
Effluent
mean)
PH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Dissolved Oxygen
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Temperature
Daily
Grab
I Effluent
Conductivity
Daily
Grab
Effluent
Total Nitrogen
Monthly
Composite
Effluent
(NOz+NO,+TKN)
Total Mercury
0.012 µg/L
Weekly
Grab
Effluent
Total Zinc
2/Month
Composite
Effluent
Total Copper
2/Month
Composite
Effluent
Chronic Toxicity
Quarterly
Composite
Effluent
Notes:
1. See A. (3.) for instream sampling requirements.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective
influent value (i.e., 85% removal required).
3. The Permittee shall base Total Phosphorus compliance upon a quarterly average of weekly samples.
4. Chlorine monitoring and limit apply only if chlorine is added to the treatment system.
5. Sampling and analysis for mercury shall conform to analytical techniques specified in test method EPA 1631E.
6. Chronic Toxicity (Ceriodaphnia) at 90 %; January, April, July and October (see A. (4.)].
7. Additional PPA and 2" Species testing is required by this permit (see Special Conditions A. (5.) and A. (6.)]
The Perrnittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit NCO020559
A. (3.) INSTREAM MONITORING REQUIREMENTS
Effluent Characteristics
Monitoring Require ents
Measurement
Frequency
Sample
Type
Sample
Locationl
Dissolved Oxygen
Weekly
Grab
U, D1, D2
H
Weekly
Grab
U, DI, D2
Temperature
Weekly
Grab
U, D1, D2
Conductivity
Weekly
Grab
U, D1, D2
Dissolved Oxygen Aril — October
Monthly
Profile 2
D1, D2
H A ril-October
Monthly
Profile 2
D1, D2
Temperature (April -October)
Monthly
Profile 2
D1, D2
Secchi Depth (April -October)
Monthly
Composite
D1, D2
NO2. NO3 (April -October)
Monthly
Composite'
D1, D2
NH3-N (April -October)
Monthly
Composite 3
D1, D2
TKN (April -October)
Monthly
Composite 3
D1, D2
Total Phosphorus (April -October)
Monthly
Composite 3
D1, D2
Chloro h ll-a (April -October)
Monthly
Composite '
D1, D2
Notes:
1. U = upstream at NC Highway 39. D 1 = downstream at the power lines. D2 = downstream
immediately above the confluence of Indian and Crooked Creeks.
2. Profiles should be taken at one (1) meter intervals.
3. Composites shall be collected as spatial composites throughout the photic zone (i.e. two
times the secchi depth.)
As per 15A NCAC 213.0505 (c) (4), stream sampling may be discontinued at such time as flow conditions in
the receiving waters or extreme weather conditions will result in a substantial risk of injury or death to
persons collecting samples. In such cases, on each day that sampling is discontinued, written justification for
the discontinuance shall be specified in the monitoring report for the month in which the event occurred.
This provision shall be strictly construed and may not be utilized to avoid the requirements of 15A NCAC
213.0500 when performance of these requirements is attainable. When there is discontinuance pursuant to
this provision, stream sampling shall be resumed at the first opportunity after the risk period has ceased.
A. (4.) 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 subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February
1998) or subsequent versions. The tests will be performed during the months of January, April, July and
October. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.

Permit NCO020559
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 11 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 TGP311
for the pass/fail results and THP313 for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be
sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than
30 days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form
indicating the facility name, permit number, pipe number, county, and the month/year of the report with the
notation of "No Flow" in the comment area of the form. The report shall be submitted to the Environmental
Sciences 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, this 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.
A. (5.) ANNUAL WHOLE EFFLUENT TOXICITY - 2" SPECIES TESTING
The Permittee shall provide four (4) additional toxicity analyses to verify the absence of chronic toxicity. This
WET testing shall be similar to that described in Section A.(4.) except conducted with an alternate species. 2°a
Species Testing shall occur approximately annually except to provide seasonal results. Please consult with
your North Carolina -certified laboratory for details. Report test results to the Division within 90 days of
sampling. Two copies of the report shall be submitted along with the DMRs to the following address: NC
DENR / DWQ / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

Permit NC0020559
A. (6.) Effluent Pollutant Scan
The Permittee shall perform an annual pollutant scan of its treated effluent for the following parameters:
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
Total Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalenc
Total Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysenc
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachlorocthylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
I,I,I-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydra7ine
Thallium
4,6-dinitro-o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadicne
Volatile organic compounds:
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-trichlorophenol
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
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethylvinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-tichlorobenzene
1,1-dichloroethane
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chlorocthoxy) methane
1. The total set of samples analyzed during the current term of the permit must represent seasonal variations.
2. Samples shall be collected and analyzed in accordance with analytical methods approved under 40 CFR Part 136.
3. Unless indicated otherwise, metals must be analyzed and reported as total recoverable.
4. Test results shall be reported to the Division in DWQ Form- DMR-PPAI or in a form approved by the Director,
within 90 days of sampling. Two copies of the report shall be submitted along with the DMRs to the following
address: NC DENR / DWQ / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

NCDENR / DWQ / NPDES Program
FACT SHEET
FOR NPDES PERMIT RENEWAL
Permit NC0020559
INTRODUCTION
City of Henderson / Henderson Water Reclamation Facility, herein called Henderson or the Permittee,
requires a National Pollutant Discharge Elimination System (NPDES) permit to dispose treated wastewater
to the surface waters of the state. The permittee's 5-year NPDES permit expired March 31, 2007 and they
have requested renewal from the Division of Water Quality (the Division). This Fact Sheet summarizes
background information and rationale used by the Division's NPDES Program to determine permit limits
and monitoring conditions for renewal.
FACILITY RECORDS REVIEW
Facility Description. Henderson WWTP (Table 1) is 4.14 MGD (6.0 MGD upon expansion), Grade IV,
publicly owned treatment works (POTW) with a Pretreatment Program. The treatment system consists of a
bar screen and grit chamber, Parshall flume, influent flow meter, primary clarifiers, trickling filters,
secondary clarifiers, pure -oxygen activated -sludge nitrification basin, final clarifiers, tertiary filters, post
aeration, UV disinfection (with sodium hypochlorite backup), dissolved air flotation sludge thickening, .
pure -oxygen aerobic digester, sludge holding tank and sludge drying beds.
Table 1.
n ,4xG?:- xA:SykE -'�'xr-'4 ti353 ui�l11�.- .,,yyx -..a v Sc•ik{..ax- «ri,�'«t.�'n�rr��wx-"c lairx .w"�^. s'�
A. we
yy��, k:� {!t� , u>FacilttyxInformatton;��h t 2�� '� y
iApphca
City of Henderson / City of Henderson Water Reclamation Facility
jApp]icanfFpddiess � c� i'S
P.O. Box 1434, Henderson, NC 27536
kFacilityAddiess
k I%
1646 West Andrews Ave., Henderson, NC
Pemvtted Floa (M GD33 NMA
Phased Permit: 4.14 and 6.0 (upon expansion)
gTsyp�eofW�aste�"° m§
Domestic (90%) / Industrial (10%)
Facility�Grade%'Pernut"StaNs
Grade IV / Renewal
Dr"a Wage BasPiiS'/Countysai�"y
Roanoke River Basin / Vance County
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Nutbush Creek
r joq 8 ."
rRegional,Office;��;�,
Raleigh
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sStream�Classtficanoti a
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Fact Sheet
Renewal -- NPDES Permit NCO020559
Page I of 5

CORRESPONDENCE -
Staff Report. Raleigh Regional Office (RRO) conducted its annual facility inspection and Shannon
Langley (RRO) prepared a Staff Report dated October 19, 2006. RRO found the facility in good
condition and generally in compliance with the permit, but notes that recent flooding events have
inundated the plant. Increase in local residential development and sewer collection system stormwater
inflow and infiltration (1/0 have exacerbated this problem. RRO recommends that the Permittee
adequately protect, and certify that treatment units are protected from, a 100-year flood. RRO further
recommends that the NPDES Program renew the permit in accordance with the Basin Plan.
Division Records and Permittee's Renewal Application. The current permit expired on March 31,
2007, and the Division received the Permittee's prompt request to renew (Standard Form C) on
September 29, 2006. The Permittee requested that Division renewal keep the phased limit page for
flow expansion to 6.0 MGD, as previously approved and permitted. This request will be granted.
COMPLIANCE REVIEW
Waste Load Allocation (WLA). The Division prepared a WLA for the receiving stream in March 1994
and developed effluent limits and monitoring requirements considering proposed flows of 4.14 MGD and
6.0 MGD. At 4.14 MGD permitted, the current in -stream waste concentration (IWC) of 97 % considered a
summer 7Q10 flow of 0.2 efs in Nutbush Creek. The Division views these limits and monitoring
requirements appropriate for renewal except as outlined below (see Renewal Summary).
Verifying Existing Stream Conditions. This facility discharges to Nutbush Creek [Stream Index No.
23-8-(1)], a Class C waterbody within the Roanoke River Basin. Nutbush Creek is impaired [DWQ
303(d) list, February 2003] based on biological data. Although the causes of impairment are currently
"unknown," the Division suspects that contributors to impairment include this major municipal point
source, storm sewer point sources, and non -point source urban runoff.
DMR Instream Data and Effluent Flow Review. The Division reviewed 48 months of monthly
Discharge Monitoring Reports (DMRs) for January 2003 through December 2006. The Permittee's
DMRs appear regular, thorough, and complete. The Division compared daily flows for years 2005, 2006,
and part of 2007. These data yield a 27-month average flow of 2.4 MGD, or a discharge amounting to
about 58 % of currently permitted capacity (Phase 1).
Reasonable Potential Analyses (RPA) — Pollutants of Concern (POCs). The Division established
renewal permit limits and monitoring for metals and toxicants by evaluating the Permittee's analytical
database from January 2005 through March 2007. To establish POCs, the Division reviewed the permit
application, discharge monitoring reports (2003 through 2006), pretreatment data, and the Basin Plan. The
Division applied the standard Reasonable Potential Analysis (RPA) to calculate a maximum predicted
concentration for each POC. Each maximum was then compared to the POC's freshwater Chronic
Standard (Table 2) and also to its Final Acute Value (%2 FAV) for freshwater (Table 3).
Note: The Division also calculated RPA for the permitted Phase II flow (6.0 MGD) and the results
are identical to Phase I shown below (4.14 MGD).
Fact Sheet
Renewal -- NPDES NCO020559
Page 2 of 5

If by the above method,.a POC showed reasonable potential to exceed its % FAV, the Division
included a permit limit as a Daily Maximum to protect the receiving stream against acute toxic
affects. Similarly, if the maximum exceeded the chronic standard, a Weekly Average limit was added
to the permit. Table Comments and Renewal Actions reference the previous permit, effective January
1, 2003. Findings and renewal actions are summarized in Renewal Summary, Table 4.
Table 2. Henderson WRF -- Chronic RPA Findings and Renewal Action
" �
c 3`t "F,*
.
a
s Hits
x
y✓vv ,".Y
d —k dt... ; aCI'A�'Ulffiw'ab
✓ Maximum
y T+tN
�x
ncentration-
RP*
, �.aaalei��� +Samples
ya 'Comments°/•t „ �"Parameter
Svc a
��
P7
7Ny/n,
9c qr
tt�
„R3�3t�l
No changes to permit. Action
Copper
108
108
34 µg/L
7 µg/L
Yes
Level Standard — no toxicity
problem, therefore no limit
103
103
13 n L
12 n L
Yes
No changes to the permit.
MBAS , ;u, a
77
1
271 µg/L
500 µg/L
No
Delete permit monitoring
to pretreatment program)
Nickel P,% �;
32
32
23 µg/L
91 µg/L
No
Delete permit monitoring
p g
to pretreatment program)
Silve
61
0
Not detected
_
Delete permit monitoring
,Ssk.+-?;:.=-x•F•
to pretreatment program)
3ilj ' P
No changes to permit. Action
1Z nt cF i I F";
53
53
99 µg/L
52 µg/L
Yes
Level Standard —no toxicity'5t19problem,
therefore no limit
*RP = data indicate reasonable potential to exceed instrearn Water Quality Standard.
Table 3. Henderson WRF -- Acute RPA Findings and Renewal Action
1 N nGs�w J
Parameter,
Samples
s�,t
�Hrt's L,
N Mixfmum
. +
ry M,
w,,
Main J �
a
n �ii.
n-Predicted,.,
AT,a r,�
�
rCMCt�
r
/n
ssi
„tRenewalAction r.
No changes to permit. Action
tCopper�E
108
108
34 µg/L
7 µg/L
Yes
Level Standard — no toxicity
1 .;
problem, therefore no limit
"rtir `
No acute criteria - standard
`sad'
M�e'rcury
103
103
13 n/L
g
..
—
based onbio-accumulation
[iR�sr.. �rrixfd.t`
see Table 2
»MBAS a4;,'
77
1
271 L
_
—
No Acute Standard
a y'"
Nicl el., p
32
32
23 µg/
261 µg/L
No
Delete permit monitoring
see Table 2
Silver t1+a?
61
0
Not detected
Delete permit monitoring
e
see Table 2
�4
No changes to permit. Action
Zme `2� . 'r '
53
53
99 µg/L
67 µg/L
Yes
Level Standard — no toxicity
t
problem therefore no limit
*RP = data indicate reasonable potential to exceed instream Water Quality Standard.
Effluent Total Residual Chlorine (TRC). The Permittee currently disinfects effluent using ultra -violet
(UV) facilities, but reserves chlorination and de -chlorination facilities as redundant backup. Effluent
Monitoring currently includes a Weekly Average TRC limit of 17 µg/L (compliance applicable only if
chlorine is used). No other changes recommended.
Whole Effluent Toxicity (WET) Testing. The Division reviewed Henderson's quarterly Whole
Effluent Toxicity testing records from January 2003 through January 2007 (25 quarterly tests including
Fact Sheet
Renewal -- NPDES NC0020559
Page 3 of 5

second -species tests). These tests indicate, "pass" except for two - in July 2004 and April 2005. These
exceptions were followed by monthly tests indicating, "pass" at >100 %.
Compliance Notices of Violation (NOVs) and Penalty Assessment. The Permittee has an excellent
permit compliance record with no penalties assessed since September 2001.
Pretreatment Compliance. The Permittee manages an NCDENR-approved Long Tenn
Management Plan (LTMP) or Pretreatment Program, as required under federal regulations 40CFR
403 and NC State regulations 15A NCAC 2H.0900. As of this reporting, Henderson services 4
significant industrial users (SlUs) detailed in the application to renew (Supplemental Application
Information, Part F). The Division requires this facility to continue this Pretreatment Program.
RENEWAL SUMMARY
The following permit changes and renewal recommendations reference the previous permit (effective
January 1, 2003).
Effluent Monitoring
Tnhle a. Permit Renewal — Summary of Chanties to Previous Permit:
P,aTametei•_r
;`RPx�;
;WPM u' 'V enenewal Action-O.. � t..
aTRCR 'ts�aSE
_
Added 17 u 2 limit and monitoring for Total Residual Chlorine(only if used for disinfection
Co'"' a S'srat
Yes
No changes to thepermit; continue monitoring 2/Month
;rMer'cur::-; aX
Yes
No changes to thepermit; continue monitoring 1/Week
;•MBAS';`rF;'Cvi;:'
No
Deleted monitoring to pretreatment LTMP, as appropriate)
:, v ., ,,,
,Nickel�rM;rG+�*z,>..�
No
Deleted monitoring to pretreatment LTMP, as appropriate)
1Sitve'r-;"il,f tli[;
No
Deleted monitoring to pretreatment LIMP, as appropriate)
zi
Yes_I
No changes to thepermit; continue monitoring 2/Month
'RP = data indicate reasonable potential to exceed parameter -specific instream water -quality standard.
Instream Monitoring: --Previous Requirements:
Upstream (U)—1/Week
Dissolved Oxygen (DO)
PH
Temperature
Conductivity
Renewal: -- No changes recommended.
Downstream at DI & D2
(1/Month — April through October)
Dissolved Oxygen (DO)
PH
Temperature
Conductivity
Secchi Depth
NO2 + NO3
Ammonia (NH3)
TKN
Total Phosphorus
Fact Sheet
Renewal -- NPDES NC0020559
Page 4 of 5

PROPOSED SCHEDULE OF ISSUANCE
Draft Permit to Public Notice: June 20, 2007
Permit Scheduled to Issue: August 20, 2007
NPDES UNIT CONTACT %
If you have questio"arding y of 2lie above information or on the attached permit, please
contact Joe Corporon at (9)9) 7 5083 xt. 597.
TE:13���Z
COMMENTS
NAME: DATE:
REGIONAL SUPER
NPDES SUPERVISOR: DATE:
Fact Sheet
Renewal -- NPDES NCO020559
Page 5 of 5

REASONABLE POTENTIAL ANALYSIS
Henderson WWTP
NCO020559
Time Period Jan2005-Mar2007
Ow (MGD) 4.14
WWTP Class IV
7010S (cis) 0.2
IWC (%) ® 7010S 96.977
7010W (cis) 0.4
0 7Q 10W 94.132
30Q2 (cis) 0.5
® 3002 92.771
Avg. Stream Flow, OA (c/s) 3.5
® CIA 64.707
Rec'ving Stream Nutbush Creek
Stream Class C
Outfall 001
Ow = 4.14 MGD
STANDARDS&
PARAMETER
TYPE
CRITERIA(2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
111
Nh.k Acute
n a0at Abxl cw Allowable Cw
Chronk Acute
Acute: 7
RP=YES
Copper
NO
7 AL 7.3
ug/L
106 106
34
Chronic---7
RP=YES----_------------
Acute: N/A
Mercury
NC
12
2.0000
rg/L
103 103
13
Chronic:---12
RP=YES---_---------------_---_
Acute: N/A
MBAS
NC
500
ug/L
77 1
271.2
Chronic 516
RP=NO __-_-___-_._-_-_-__— ----
Acute: 261
RP=NO
Nickel
NC
all261
ugrL
32 32
23
--------_---------------
Chronic: 91
RP=NO
Acute: 1
Not Detected
Sliver
NO
0.06 AL 1.23
ug/L
61 0
1.0
___ _
Chronic 0
Not Detected
Acute: 67
RP=YES
Zinc
NC
50 AL 67
ug/L
53 53
99.2
Chronic---52
flP=YES-----------------_----
Legend: •• Freshwater Discharge
C= Carcinogenic
NC= Non -carcinogenic
A=Aesthetic
20559 RPA - 2007, rpa
6/122007

Table 1. Project Information
Facility Name
WWTP Grade
NPDES Permit
Outfal I
Flow, Qw (MGD)
Receiving Stream
Stream Class
7010s (cfs)
7010w (cfs)
3002 (cfs)
QA (cfs)
Time Period
Data Source(s)
Henderson Water Reclamation Facility
IV
NC0020559
001
4.1
Nutbush Creek
C
0.2
0.4
0.5
3.5
Jan2005-Mar2007
BIMS / DMRs
Par01
Par02
Par03
Par04
Par05
ParO6
Par07
Par08
ParOg
Par10
Par11
Par12
Par13
Par14
Par15
Table 2. Parameters of Concern
Name Type Chronic Modifier Acute PQL Units
ug/L
ug/L
ug/L
ug/L
Copper
NC
7
AL
7.3
ug/L
ug/L
ug/L
ug/L
Mercury
NC
12
2.0
ng/L
MBAS
NC
500
ug/L
Nickel
NC
88
261
ug/L
ug/L
ug/L
Silver
NC
0.06
AL
1.23
ug/L
Zinc
NC
50
AL
67
ug/L
20559 RPA - 2007, input
6/12/2007

Table 1. Project Information
Facility Name
WWTP Grade
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
Stream Class
7010s (cfs)
7010w (cfs)
3002 (cfs)
CIA (cfs)
Time Period
Data Source(s)
Henderson WWTP
IV
NCO020559
001
4.1
Nutbush Creek
C
0.2
0.4
0.5
3.5
Jan2005-Mar2007
BIMS / DMRs
Par01
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Part
Par12
Par13
Par14
Par15
Table 2. Parameters of Concern
Name Type Chronic Modifier Acute PQL Units
ug/L
ug/L
ug/L
ug/L
Copper
NC
7
AL
7.3
ug/L
ug/L
ug/L
ug/L
Mercury
NC
12
2.0
ng/L
MBAS
NC
500
ug/L
Nickel
NC
88
261
ug/L
ug/L
ug/L
Silver
NC
0.06
AL
1.23
ug/L
Zinc
NC
50
AL
67
ug/L
20559 RPA - 2007, input
6/12/2007

REASONABLE POTENTIAL ANALYSIS
Copper
Mercury
Date
Data
BDL-112DL
Results
Date
Data
BDL=1/2DL
Results
1
2005
13.
13.0
Sid Dev.
4.4876
1
2005
1.37
1.00
Std Dev.
1.2087
2
2005
12.
12.0
Mean
8.5370
2
2005
1.28
1.00
Mean
1.8483
3
2005
C.V.
0.5257
3
2005
C.V.
0.6539
4
2005
`
12.
12.0
n
108
4
2005
1.86
1.00
n
103
5
2005
8.
8.0
5
2005
1.36
1.00
-
6
2005
11.
11.0
Mull Factor =
1.3400
6
2005
1.22
1.00
Mult Factor =
1.45
7
2005
13.
13.0
Max. Value
25.0 ug/L
7
2005
1.51
1.00
Max. Value
9.0 ng/L
8
2005
17.
17.0
Max. Fred Cw
33.5 ug/L
8
2005
Max. Fred Cw
13.0 ngrL
9
2005
;:
5.
5.0
9
2005
2.65
2.65
10
2005
-
9.
9.0
10
2005
1.74
1.00
11
2005
-
10.
10.0
11
2005
1.69
1.00
12
2005
17.
17.0
12
2005
-
1.48
1.00
"
13
2005
9.
9.0
13
2005
:
1.8
1.00
14
2005
14
2005
15
2005
14.
14.0
15
2005
2.71
2.71
16
2005
;
16
2005
17
2005
17
2005
1.38
1.00
corrected
18
2005
`_
18
2005
3.58
3.58
corrected
19
2005
10.
10.0
19
2005.
3.27
3.27
corrected
20
2005
20
2005
2.7
2.70
corrected
21
2005
21
2005
1.19
1.00
corrected
22
2005
22
2005
1.97
1.00
corrected
23
2005
23
2005
1.61
1.00
corrected
24
2005
24
2005
25
2005
25
2005
1.76
1.00
26
2005
11.
11.0
26
2005
27
2005
11.
11.0
27
2005
3.47
8.47
28
2005
-'
13.
13.0
28
2005
1.62
1.00
29
2005
18.
18.0
29
2005
1.77
1.00
30
2005
-
30
2005
-
31
2005
9.
9.0
31
2005
1.3
1.00
32
2005
32
2005
1.23
1.00
33
2005
6.
6.0
33
2005
2.09
2.09
34
2005-
7.
7.0
34
2005
1.38
1.00
35
2005
35
2005
1.11
1.00
36
2005
8.
8.0
36
2005
2.39
2.39
37
2005
9.
9.0
37
2005
3.87
3.87
38
2005
10.
10.0
38
2005
3.85
3.85
39
2005
,'
6.
&0
39
2005
2.01
2.01
40
2005
40
2005
41
2005
7.
7.0
41
2005
4.78
4.78
42
2005
8.
8.0
42
2005
-
2.89
2.89
43
2005
12.
12.0
43
2005
1.18
1.00
44
2005
'
11.
11.0
44
2005
'
45
2005
9.
9.0
45
2005
1.21
1.00
46
2005
7.
7.0
46
2005
2.91
2.91
47
2005
9.
9.0
47
2005
1.3
1.00
48
2005
.
8.
8.0
48
2005
".
1.25
1.00
49
2005
6.
6.0
49
2005
'
2.12
2.12
50
2005
4.
4.0
50
2005
.';
1.44
1.00
51
2005
'
51
2005
52
2005
9.
9.0
52
2005
.
1.07
1.00
53
2005
7.
7.0
53
2005
2.25
2.25
54
2005
:
54
2005
55
2005
55
2005'
56
2005
7.
7.0
56
2005
'
2.51
2.51
57
2005
7.
7.0
57
2005
`
1.32
1.00
58
2005
,
13.
13.0
58
2005
,:.
1.48
1.00
59
2005
,
6.
6.0
59
2005
1.26
1.00
60
2005
60
2005
"
61
2005
,:.
61
2005:
62
2005
11.
11.0
62
2005
1.23
1.00
63
2006
;
63
2006
64
2006
12.
12.o
64
2006
1.27
1.00
65
2006
),
11.
11.0
65
2006
3.16
3.16
66
2006
-
66
2006
67
2006
'.
6.
6.0
67
2006
1.59
1.00
68
2006
n.
13.
13.0
68
2006
-,
1.84
1.00
69
2006
'
7.
7.0
69
2006
3.07
3.07
70
2006
8.
8.0
70
2006
3.12
3.12
71
2006
'..
11.
11.0
71
2006
1.73
1.00
20559 RPA - 2007, data
-3- 6/12/2007

REASONABLE POTENTIAL ANALYSIS
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
2006
24.
24.0
72
2006
1 7.
7.0
73
2006
' 16.
16.0
74
2006
r 15.
15.0
75
2006
9.
9.0
76
2006
16.
16.0
77
2006
16.
16.0
78
2006
'. 7.
7.0
79
2006
80
2006
6.
6.0
81
2006
e.
8.0
82
2006
8.
8.0
83
2006
; 25.
25.0
84
2006
3.
3.0
85
2006
' 11.
11.0
86
2006
87
2006
9.
9.0
88
2006
9.
9.0
89
2006
4.
4.0
90
2006
7.
7.0
91
2006
7.
7.0
92
2006
93
2006
10.
10.0
94
2006
5.
5.0
95
2006
9.
9.0
96
2006
8.
8.0
97
2006"
6.
6.0
98
2006
; 5.
5.0
99
2006
6.
6.0
100
2006
15.
15.0
101
2006
15.
15.0
102
2006
6.
6.0
103
2006
i
104
2006
5.
5.0
105
2006
6.
6.0 -
106
2006
��. 15.
15.0
107
2006
-- 15.
15.0
108
2006
6.
6.0
109
2006
3.
3.0
110
200s
4.
4.0
111
2006
4.
4.0
112
2006
4.
4.0
113
2006
4.
4.0
114
2006
.
115
2006
- 4.
4.0
116
2006
3.
3.0
117
2006
118
2006
119
2006
3.
3.0
120
2006
3.
3.0
121
2006
i 3.
3.0
122
2006
,.. 3.
3.0
123
2006
=. 9.
9.0
124
2007
125
2007
12.
12.0
126
2007
'' 2.
2.0
127
2007
128
2007
6.
6.0
129
2007
3.
3.0
130
2007
4.
4.0
131
2007
NN 3.
3.0
132
2007
; 3.
3.0
133
2007
r": 3.
3.0
134
2007
'+ 3.
3.0
135
2007
' 4.
4.0
136
2007
.5 4.
4.0.
137 =.
2007
7.
7.0
138
2007
5.
5.0
139
2006.
1.49 1.00
2006
2.27 2.27
2006
2.26 2.26
2006
1.38 1.00
2006
�'.
3.17 3.17
2006
'
3.08 3.08
2006
1.83 1.00
2006
1.4 1.00
2006
2006
2.35 2.35
2006
,.»
2.89 2.89
2006
2006
2. 2.00
2006
'.
3.28 3.28
2006
2.29 2.29
2006
_
2006
._
1.66 1.00
2006
2.41 2.41
2006
4.27 4.27
2006
3.13 3.13
2006
-.
2.68 2.68
2006
2006.
1.49 1.00
2006
`.
2.46 2.46
2006
2.09 2.09
2006
2.62 2.62
2006
2006
'
1.08 1.00
1.08 1.00
1.4 1.00
1.39 1.00
1.36 1.00
1.24 1.00
2.55 2.55
2005
1.69
1.00
2006
a
8.97
8.97
2006
.
2006
.;
2006
1.32
too
2006
1.57
1.00
2006
2.28
2.28
2006
r
2006
-,
2006
'.
2006
1.3
1.00
2007
2007
3.16
3.16
2007
1.94
1.00
2007
2007
1.32
1.00
2007
2.38
2.38
2007
�.
1.26
1.00
2007
"
2.15
2.15
2007
1.38
1.00
2007-
2.75
2.75
2007
1.9
to0
2007
1.68
1.00
2007
2.93
2.93
2007
`F.
1.77
1.00
2007
;3
2.55
2.55
-4-
20559 RPA - 2007. data
6/12/2007

REASONABLE POTENTIAL ANALYSIS
MBAS Nickel
Date Data BDL-12DL Results Date Data BDL=1/2DL Results
1 " 1kT < 200 100.0 Std Dev. 15.95 1 2005 - Sul Dev. 2.5095
2�+ < 200 100.0 Mean 101.82 2 2005 Mean 6.6563
v
3F �� < 200 100.0 C.V. 0.16 3 2005 C.V. 0.3770
4 t u� 240 240.0 n 77 4 2005 n 32
SA < 200 100.0 5 2005
6 '�"< 200 100.0 Mult Factor = 1.1300 6 2005 Mult Factor = 1.5600
71 •��t < 200 100.0 Max. Value 240.0 ug4 7 2005 Max. Value 15.0 u9/L
a'{p'I�Y `'�' < 200 100.0 Max. Fred Cw 271.2 ug/L a 2005 Max. Fred Cw 23.4 uglL
9' k ' 200 100.0 9 2005
c ret f
10 p�.r� 0 200 100.0 10 2005 '
200 100.0 11 2005 =,
121 200 100.0 12 2005 12. 12.0
13 1
1 < 200 100.0 13 2005
14't < 200 100.0 14 2005
15' . ?'"- h` < 200 100.0 15 2005 15. 15.0
16 ¢r%' 5 200 100.0 16 2005
17 t(1�;, a. 200 loco 17 2005
18#u t 200 100.0 18 2005
19 `'1"' ' < 200 100.0 19 2005 -
20 200 100.0 20 2005
211 1 < 200 100.0 21 2005 .
22e „- < 200 100.0 22 2005
23 ' 200 100.0 23 2005
24 r• 1G < 200 100.0 24 2005
'' 200 100.0 25 2005 11. 11.0
2s rtY e 200 100.0 26 2005 '
27` �.++ 200 100.0 27 2005
"''`" < 200 100.0 28 . 2005
29r, 200 100.0 29 2005.
30 t q , ' ' < 200 100.0 30 2005
31+'4 -< 200 100.0 31 2005
32 q' (ji, 5 200 100.0 32 2005
33 k rli < 200 100.0 33 2005
34„: ;< 200 100.0 34 2005
35 hot 200 100.0 35 2005 "
36% < 200 100.0 36 2005
37 ' < 200 100.0 37 2005
38 +.�'�+ < 200 100.0 38 2005
391"' ;p.'� a� < 200 100.0 39 2005
40 �r - 200 100.0 40 2005 -
41`' r r e 200 100.0 41 2005
42 , a, _ 200 100.o a2 2005
433•+ �, ,'' t44 200 100.0 43 2005
44s v < 200 100.0 44 2005
45.i 5 ''' 200 100.0 45 2005 _
46 =n''2 < 200 100.0 46 2005
47M� < 200 100.0 47 2005
4e1;°01F.< 200 100.0 as 2005
49200 100.0 49 2005
50' : 200 100.0 50 2005
51 200 100.0 51 2005
52 �Ery� b\ 200 100.0 52 2005 5. 5.0
53 pke, 200 100.0 53 2005 '
54 < < 200 100.0 54 2005
55;' �r +�• < 200 100.0 55 2005
ss �t 200 100.0 56 2005 , 7. 7.0
57 200 199.9 57 2005
sa 200 100.0 58 2005 `
59 -" 4 < 200 100.0 59 2005
so rrti*FRI < 200 100.0 60 2005 „
61 ,z,ss .� ' ti'� < 200 10g.o 61 2005
626'�t,y"� .g1Flk < 200 100.0 62 2005
63, g ° 200 100.0 63 2006
64'u" i1 ' t 200 100.0 64 2006 1
65 4,0�-,GiW.'� < 200 100.0 65 2006
e7^u,'+.��re < 200 100.0 66 2006
dJa < 200 100.0 67 2006
68 #� yq. 5 200 100.0 68 2006
69 'in x� I < 200 100.0 69 2006
70 `,.t"drar�"Qp < 200 100.0 70 2006 ,
7t."�4l:k!�"Y7i$ < 200 100.0 71 2006
20559 RPA - 2007, data
-5- 6/12/2007

REASONABLE POTENTIAL ANALYSIS
72
73
74
75
1 81
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
111
112
113
114
115
116
117
118
119
120
121
130
131
132
133
134
135
136
137
200 100.0
200 100.0
200 100.0
200 100.0
200 100.0
200 100.0
72 2006
73 2006
74 2006
75 2006
76 2006
77 2006
78 2006
79 2006
so 2006
81 2006
82 2006
83 2006
84 2006
85 2006
86 2006
87 2006
88 2006
89 2006
90 2006
91 2006
92 2006
93 2006
94 2006
95 2006
96 2006
97 2006
98 2006
99 2006
100 2006
101 2006
102 2006
103 2006
104 2006,
105 2006I
106 2006
107 2006
108 2006
109 2006
110 2006
111 2006
112 2006
113 2006
114 2006
115 2006
116 2006
117 2006
118 2006
119 2006
120 2006
121 2006
122 2006
123 2006
124 2006
125 2006
126 2006
127 2007
128 2007
129 2007
130 2007
131 2007
132 2007
133 2007'
134 2007
135 2007
136 2007
137 2007
138 2007
139 2007
140 2007
6. 6.0
6. 6.0
5. 5.0
8. 8.0
9. 9.0
6. 6.0
9. 9.0
5. 5.0
7. 7.0
6. 6.0
5. 5.0
7. 7.0
5. 5.0
5. 5.0
5. 5.0
5. &0
7. 7.0
5. 5.0
5. &0
5. 5.0
5. 5.0
6. 6.0
5. 5.0
5. 5.0
5. 5.0
-6-
20559 RPA - 2007, data
6/1212007

REASONABLE POTENTIAL ANALYSIS
Silver
Zinc
Date
Data BDL-112DL
Results
Date
Data
BDL-112DL
Results
1
1.0
Std Dev.
0.0000
1
2005
-
Std Dev.
11.6252
2
< ° v2� 1.0
Mean
1.0000
2
2005
23.
23.0
Mean
38.6792
3
1.0
C.V.
0.0000
3
2005
"
C.V.
0.3769
4
i 2 1.0
n
61
4
2005
n
53
5
< i 21.0
5
2005
g
T' 1.0
Mull Factor =
1.0000
6
2005
Mult Factor =
1.3400
6
< ,, 2 1.0
Max. Value
1.0 ug/L
7
2005
Max. Value
74.0 ug4.
g
lr
< 2 1.0
Max. Pred Cw
1.0 ug0.
a
2005
Max. Pied Cw
99.2 uglL
9
< -_ 12 1.0
9
2005
10
$2' 1.0
10
2005
11
< N; 2 1.0
11
2005
'
12
2 . 2; 1.0
12
2005
13
1.0
13
2005
14
<' 21 1.0
14
2005
15
a011 10
15
2005
16
y2� 1.0
16
2005
17
-
P 2i 1.0
17
2005
e
1 1.0
2 2`
1E
2005
79
2' 1.0
19
2005
59.
59.0
20
�m
�h1•`412' 1.0
20
2005
21
w>
< a .k'2� 1.0
21
2005
-
22
c C 1 '2 ; 1.0
22
2005
23
< a . 2I 1.0
23
2005-
74.
74.0
24
2f 1.0
24
2005
�-
25
< 2 1.0
25
2005
28
< � 2j� 1.0
28
2005
27
�2 1.0
27
2005
28
dF21
< $1� 2 1.0
28
2005
29
< ; °" �2� 1.0
29
2005
;
30
< fi` 2� 1.0
30
2005
31
.< i 1.0
31
2005
32
< yn 21 1.0
32
2005
24.
24.0
33
< ;:j'14" Z 7.0
33
2005
34
2, 1.0
34
2005
.
35
<121 1.0
35
2005
36
< ��,pp.,,'�2, 1.0
36
2005
'.
37
'<p''21 1.0
37
2005
38
':21 1.0
38
2005
39
<p{p� 21 1.0
39
2005
40
< iA',;k,,rY.. 1.0
40
2005
k
41
"' �9 1.0
41
2005
42
< j Z 1.0
42
2005
43
<,`b�` 2, 1.0
43
2005
,
44
<M.12, 1.0
44
2005
45�„}2
1.0
45
2005
35.
35.0
46
'�< 42! 1.0
48
2005
;.
47
< "!p' 21 1.0
47
2005
48
�."-°21 1.0
48
2005
-
4a
< ?..2! 1.0
49
2005
'
50
<'gT�. 1.0
50
2005
66.
66.0
51
2'2, 1.0
51
2005
`
52
< 21 1.0
52
2005
;
53
2
� f '�� 21 1.0
53
2005
54
< a1(r42': 1.0
54
2005
55
1.0
tk2j
55
2005
56
1.0
e
56
2005..
57
i 2� 1.0
57
2005;
58
1 V 1.0
58
2005
59
<"21 1.0
59
2005
60
< 21! 1.0
60
2005
61
k
< k,' -Z 1.0
61
2005
62
r •'.T
62
2005
63;'�k
63
2006
,
64
�k
64
2006
65
, 1,'r
65
2006
28.
28.0
66
�{,,
66
2006
67
'`
�a..1i a
67
2006
68
„ ��
88
2006
54.
54.0
69
`
69
2006
70
�°,;,
70
2006
38.
38.0
71
71
2006
26.
26.0
20559 RPA - 2007, data
- 7 - 6/1212007

REASONABLE POTENTIAL ANALYSIS
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2006
2007
2007
2007
2007
2007
2007
49. 49.0
55. 55.0
43. 43.0
39. 39.0
36. 36.0
50. 50.0
44. 44.0
34. 34.0
51. 51.0
38. 38.0
30. 30.0
28. 28.0
34. 34.0
31. 31.0
33. 33.0
29. 29.0
49. 49.0
27. 27.0
28. 28.0
34. 34.0
46. 46.0
28. 28.0
34. 34.0
46. 46.0
30. 30.0
39. 39.0
26. 28.0
26. 26.0
27. 27.0
38. 38.0
57. 57.0
27. 27.0
21. 21.0
29. 29.0
32. 32.0
26. 26.0
37. 37.0
27. 27.0
29. 29.0
26. 26.0
35. 35.0
39. 39.0
-8.
20559 RPA - 2007, data
6/12/2007

0 sr"
1510
A ;z
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
w
REGION 4
i Q
ATLANTA FEDERAL CENTER
15, woe
"�
61 FORSYTH STREET
PRCIS
ATLANTA, GEORGIA 30303-8960
Jt,L 0 3 yp;
Mr. Joe Corporon
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
Henderson WRF
Permit No. NCO020559
Dear Mr. Corporon:
P�
-�' JUL 5 2007 !
In accordance with the EPA/NCDENR MCA, we have completed review of the draft
permit referenced above and have no comments. We request that we be afforded an additional
review opportunity only if significant changes are made to the draft permit prior to issuance or it'
significant comments objecting to it are received. Otherwise, please send us one copy of the final
permit when issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
Internet Address (URL) a http,//www,epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30 % Postconsumer)

J
CITY OF HENDERSON
Post Office Box 1434
Henderson, North Carolina 27536-1434
Henderson Water Reclamation Facility
1646 West Andrews Avenue
Henderson, North Carolina 27537
Phone: [phone] FAX
June 28, 2007
Mr. Joe Corporon, L.G.
NC DENR
Division of Water Quality
NPDES Program, East
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: City of Henderson Water Reclamation Facility
NPDES Permit ---Draft Review ---Comments and Requests
Permit No. NCO020559
Vance County
Dear Mr. Corporon,
After review of the new draft permit I have the following comments:
[phone]
ftJUL 2 200 D
D;-'iR - ',IATtR aU.1I ITy
PUINT SOUR E (a, e,y
1. In section A. (2.) the monitoring frequency for Total Nitrogen (NO2 + NO3 + TKN) is listed as
daily. The frequency at 4.14 MGD is listed as once per month. Also, the frequency in the old permit
at 6.0 MGD was once per month. I request that this frequency of monitoring be changed to once
per month. Daily is very excessive monitoring for Total Nitrogen when the discharge of Total
Nitrogen is not limited in the permit.
2. There is an error in section A. (2.) on monitoring for residual chlorine. It is listed as once per week
and should be daily.
The City was required to run four toxicity tests with an organism other than Cerodaphnia before the
Permit could be renewed. I didn't know about this until I was notified by someone from the NPDES
program. I had just barely enough time to perform the tests If this is going to be a continuing
requirement then why isn't it included in the NPDES permit? It really should be and I request
that it be added to our permit if it is going to be required for the next renewal cycle.

4. 1 agree with your decision to remove MBAS, nickel and silver from the permit in sections A. (1.) and
A. (2.) because they no longer show a reasonable potential to exceed water quality stream standards.
5. 1 also agree with your decision to add a residual chlorine limit of 17 ug/I (if and when we use
chlorine). It is necessary to keep a low chlorine residual to prevent aquatic toxicity problems in the
receiving stream.
If you need to discuss these comments you can reach me at 252-431-6081.
Sincerely,
Jn
Thomas M. Jain
Director HWRF
C: Mark Warren, Assistant City Manager
Jerry Bello, Chief Plant Operator
Darrel Johnson, Lab Supervisor

CLIPPING OF LEGAL ADVERTISEMENT
ATTACHED HERE
g�- �Op1
0
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL,
MANAGEMENT
COMMISSION/NPDES
UNIT
1617 Mail Service Center
Raleigh, NC 27699-1617
tNOTIFICATION OF
INTENT TO ISSUE
' A NPDES
WASTEWATER PERMIT'
06 the basis of thor-
ough staff review and ap-
)plication of NC General i
Statute 143.21, Public law
192-500 and other lawful)
standards and regula-
tions, the North Carolina)
Environmental Manage-
ment Commission pro- ,
poses to issue a National
'Pollutant Discharge Elimi-
nation System (NPDES)
wastewater discharge
'permit to the person(s)
listed below effective 45'
days from the publish
date of this notice.
Written comments re-
:garding the, proposed per-
mit will be -accepted until
,30 days after the publish
date of this notice. AIII
)comments received prior
ito that date are consid-,
,ered in the final determi-
nations regarding the pro-
posed permit. The Direc-
tor of the NC Division of
/
{Water Quality may decide
'to hold a public meeting
for the proposed permit
J
should the Division re-
Iceive a significant degree
i
of public interest.
Copies of the draft per- I
mit and other supporting
information on file used to
'determine conditions I
(present in the draft permit i
•are available upon re•1._,_.
quest and payment of the
- City of Henderson,
.costs of reproduction.
Henderson Water Recla-
)Mail comments and/or re-
mation Facility
.questsfor information to
(NC0020559) has applied)
the NC Division of Water
for renewal of its permit
Quality at the above ad:'
discharging to Nutbush.
dress or call Ms Frances
Creek within the Roanoke
Candelaria• (919) 733-
River Basin. The parame-'
15083, extension 520 at
ters BOD5 ammonia
the Point Source Branch.
(NH3 as N), Total Phos-
_
Please include the
phorus, Fecal Coliform,
NPDES permit number „Total.
Residual Chlorine
(attached) in any commu-'
(TRC), and Total Mercury
nication. Interested per-
are water -quality limited.
sons may also visit the Di-
This discharge may affect
)vision of Water Quality at,
future wasteload alloca-
1512 N. Salisbury Street,
tions' to the receiving
Raleigh, NC-27604-1148
stream.
between the hours of 8:00
a.m. and 5:00 p.m. to re-
June 22,.2007
view information on file_ j
_.
NORTH CAROLINA,
VANCECOUNTY.
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 _Phyllis Hawkins , who
being first duly sworn, deposes and says: that he/she
is
Pringipid QLerk
(Owner, partner, publisher, or other officer or employee
authorized to make this affidavit)
of Henderson Newspapers, Inc., engaged in the
publication of a newspaper known as The Daily
Dispatch, published, issued, and entered as second
class mail in the City of Henderson, 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 The Daily Dispatch on the
following dates:
June 22 2007
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 ofthe General Statutes of North Carolina.
Sworn to and subscribed before me, this 28 day of
My comlr(ssion expires:
June 28. 2008

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
(This form is best filled out on computer, rather than hard copy)
Date: 10/19/2006 County: Vance
To: NPDES Discharge Permitting Unit Permitee: Henderson WRF
Attn. NPDES Reviewer—&irolyn Bryant) Application/ Permit No.: NCO020559
Staff Report Prepared By: Shannon Langley
Project Name: City of Henderson Nutbush WRF
SOC Priority Project? (Y/N) N If Yes, SOC No. N/A n�MRN
A. GENERAL INFORMATION
1. This application is (check all that apply): ❑ New ® Renewal
❑ Modification
2. Was a site visit conducted in order to prepare this report? ® Yes or ❑ No.
a. Date of site visit: 09/19/2006 p
b. Person contacted and telephone number: Tom'Spain.(ORC):::1
c. Site visit conducted by: Shannon Langley
d. Inspection Report Attached: ® Yes or ❑ No.
r..
V
GIJ''
OCT 3 1 900^
3. Keeping BIMS Accurate: Is the following BIMS information (a. through e. below) correct?
® Yes or ❑ No. If No, please either indicate that it is correct on the current application or the
existing permit or provide the details. If none can be supplied, please explain:
Discharge Point: (Fill this section only if BIMS or Application Info is incorrect or missing)
(If there is more than one discharge pipe, put the others on the last page of this form.)
a. Location OK on Application ❑,
OK on Existing Permit ®, or provide Location:
b. Driving Directions OK on Application ❑,
OK on Existing Permit ®, or provide Driving Directions (please be accurate):
c. USGS Quadrangle Map name and number OK on ApplicationEl,
OK on Existing Permit ❑, or provide USGS Quadrangle Map name and number: B25SW
Henderson Quadrangle
d. Latitude/Longitude OK on Application ®, (check at htrv://www.tol)ozone.com These are often
inaccurate) OK on Existing Permit ❑, or provide Latitude: Longitude:
e. Receiving Stream OK on Application ❑,
OK on Existing Permit ❑, or provide Receiving Stream or affected waters: tributary to Nutbush
creek
a. Stream Classification: Class C
b. River Basin and Sub basin No.: Roanoke River basin. Subbasin No.: 03-02-06
c. Describe receiving stream features and downstream uses: Nutbush flows into John Kerr
Reservoir approximately one mile downstream. The reservoir is an important primary and

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
secondary recreation area and a drinking water supply. The Nutbush arm of the resovoir is
listed on the 303(d) list for impaired biological integrity.
For NEW FACILITIES Proceed to Section C, Evaluation and Recommendations
(For renewals or modifications continue to section B)
B. DESCRIPTION OF FACILITIES AND WASTES) (renewals and modifications only)
1. Describe the existing treatment facility: The facility consists of Influent barscreen, grit removal,
primary clarifiers, trickling filters, secondary clarifiers, pure oxygen nitrification basin, a third set of
clarifiers, tertiary filters, post aeration basin, UV disinfection, DAF unit, sludge digesters and storage
tanks, Influent and effluent flow measurement. Ferrous sulfate is added in the collection system to aid
with phosphorus removal.
2. Are there appropriately certified ORCs for the facilities? ® Yes or ❑ No.
Operator in Charge: Tom Spain Certificate # 6065 (Available in BIMS or Certification Website)
Back- Operator in Charge: Linda Leyen Certificate # 22337
3. Does the facility have operational or compliance problems? Please comment: This facility has
complied with existing permit limits. The problems associated with this facility are extreme surges of
flow during wet weather and an increased occurrence of flooding of treatment units from Nutbush
creek.
Summarize your BIMS review of monitoring data (Notice(s) of violation within the last permit cycle;
Current enforcement action(s)): The facility has met its permit limits during the last cycle. The
facility has lost some industrial clients during the last permit cycle. Nitrification has been consistent
with ammonnia levels discharged being very low. The facility does not denitrify. There are no
pending enforcement actions for the Wastewater plant. The RRO is considering different remedies
for continuing overflows within the sewer collection system and surcharged flow conditions during
wet weather. While these issues are being addressed under a different permit (WQCS00055) they do
have an effect on the wastewater reclamation facility during periods of high flow.
Are they currently under SOC, ❑ Currently under JOC, ❑ Currently under moratorium ❑? Have
all compliance dates/conditions in the existing permit, SOC, JOC, etc. been complied with? ❑ Yes
or ❑ No. If no, please explain:
4. Residuals Treatment: PSRP ® (Process to Significantly Reduce Pathogens, Class B) or
PFRP ❑ (Process to Further Reduce Pathogens, Class A)?
Are they liquid or dewatered to a cake?
Land Applied? Yes ® No ❑ If so, list Non -Discharge Permit No. Granville Farms WQ000838
Contractor Used: Granville Farms
FORM: NPDES-RRO 06/03. 9/03 2

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
Landfilled? Yes ❑ No® If yes, where?
Other'?
Adequate Digester Capacity? Yes ® No ❑ Sludge Storage Capacity? Yes ® No ❑
Please comment on current operational practices: Sludge is thickened via a DAF unit then sent to a
pure oxygen aerobic digester, a primary anaerobic digester and a secondary anaerobic digester. The
sludge is then pumped to a 1,000,000 gallon aerobic digester before being hauled away by Granville
Farms. An additional 1,000,000 gallon sludge tank and drying beds are availble if needed.
5. Are there any issues related to compliance/enforcement that should be resolved before issuing this
permit'? ❑ Yes or ® No. If yes, please explain:
C. EVAL UA TIONAND RECOMMENDATIONS
1. Alternative Analysis Evaluation: has the facility evaluated the non -discharge options available? Give
regional perspective for each option evaluated:
Spray Irrigation: N/A
Connect to Regional Sewer System: N/A
Subsurface: N/A
Other Disposal Options: N/A
2. Provide any additional narrative regarding your review of the application:
3. List any items that you would like NPDES Unit to obtain through an additional information
request. Make sure that you provide a reason for each item:
Recommended Additional Information
Reason
Certification that treatment units are adequately
protected from 100-year flood events.
Recent flooding has inundated the plant.
Lower clarifiers and DAF unit specifically
are most vulnerable units.
Flooding seems to be more prevalent due to
upstream development.
4. List specific Permit requirements that you recommend to be removed from the permit when
issued. Make sure that you provide a reason for each condition:
Recommended Removal Reason
FORM: NPDES-RRO 06/03, 9/03 3

NPDES REGIONAL WATER QUALITY
STAFF REPORT AND RECOMMENDATIONS
5. List specific special requirements or compliance schedules that you recommend to be included in
the permit when issued. Make sure that you provide a reason for each special condition:
Recommended Addition Reason
6. Recommendation: ❑ Hold, pending receipt and review of additional information by regional office;
® Hold, pending review and approval of required additional information by NPDES permitting
office; ❑ Issue; ❑ Deny. If deny, please state reasons:
Reminder: attach inspection report if Yes wa4i)cked for 2 d.
7. Signature of report preparer:
Signature of WQS regional supervisor:
Date: 10 0'�e
/0//q / o-E
FORM: NPDES-PRO 06/03, 9/03 4

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Henderson Water Reclamation Facility,NCO020559
Renewal/Expansion
Roanoke River Basin
SUPPLEMENTAL APPLICATION INFORMATION,
PART 'F:INDUSTRIAL, USER DISCHARGES AND RCRAICERCLAIWASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
X Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 4
b. Number of ClUs.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.6 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Kennametal, Inc.
Mailing Address: P.O. Box 159
Henderson NC 27536
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cooling water. boiler tower blowdown. facility washdown and groundwater remediation unit.
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Metal powder processing
Rawmaterial(s): Various metal powders primarily containing tungsten
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
3.000 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater Flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards ❑ Yes X No
If subject to categorical pretreatment standards, which category and subcategory?
Supplement Page 18 of 22
NPDES FORM 2A Additional Information

Henderson Water Reclamation Facility, NCO020559
PERMIT ACTION REQUESTED:
Renewal/Expansion
RIVER BASIN:
Roanoke River Basin
F.S. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
Yes X No If yes, describe each episode.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW(PAGE TO^DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
Supplement Page 19 of 22
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED: RIVER BASIN:
Henderson Water Reclamation Facility,NCO02055
PPermit Renewal Roanoke River Basin
i.mwY .w,DIS.N A ^+E. _ t h t'.(Y --y riY ^.
'PART{FINDUSTRI;4L+iUSER�DISCHP;RGESANDRCRA/CERCLA�WAS�TES '
K i tU\C4 i<y 1'{21L4(llY".N14.SSVfSYLhSimGr'P.S�Itti45?n" riT 6 ucN'3tES n.RdaS.. x
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
EI Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 4
I Number of CIUs. 0 -
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: The TAMS Company
Mailing Address: 845 Commerce Road
Henderson NC 27536
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Mixing, extruding and cooking of pet meat
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Pet Foods
Rawmaterial(s): Grains Processed Meats
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
26,000 gpd (X continuous or_intermitlent)
b. Non -process wastewater Flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
I Categorical pretreatment standards ❑ Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Henderson Water Reclamation Facility,NCO020559
Permit Renewal
Roanoke River Basin
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ 'Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remedlatlon Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ® No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLAJRCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
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EPA Form 3510-2A (Rev. 1.99). Replaces EPA forms 7550-6 & 7550-22. Page 19 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED: RIVER BASIN:
Henderson Water Reclamation Facility, NCO020559
Renewal/Expansion Roanoke River Basin
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SUPPLEMENTAL /aPP,LICATIONINFORMATOI�A.
s 'r� �sDIS r 4 1 S n°'Fa :v pstro `N rc « g p^
PART FrINDUSTRIAL USER;pISCHARGES�AND RRR RA/CERCLAfWASTESItrJ y�} � if
All treatment works receiving discharges from slgniflcant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
X Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 4
b. Number of CIUs.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy.questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Larsdale Inc (Old Burkhart Site)
Mailing Address: 4 South Main Street Suite 7-2
Ipswich, MA 01928
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Discharge consists of remediated groundwater from old Burkhart site resulting from pickle brine
contamination.
F.5. Principal Products) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): n/a
Raw material(s): n/a
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
6,000 gpd. (X continuous or intermittent)
b. Non -process wastewater Flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards ❑ Yes X No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information
Siinnlement Pave IS of 22

Henderson Water Reclamation Facility
PERMIT ACTION REQUESTED:
Renewal/Expansion
:RIVER BASIN:NCO020559
anoke River Basin
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
Yes X No If yes, describe each episode.
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+IREFER TiaO T E APPLICATION O�VER�[IS W'( AG,E 1)fTOIDE�TiERMINE WH IC WHERPARTSa .
Supplement Page 19 of 22
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Henderson Water Reclamation Facility, NCO020559
Renewal/Expansion
Roanoke River Basin
SUPPLEMENTAL APPLICATION INFORMATION
5... li,oj'.L?.' cO. II$. .•e.n �.�".l.n a{£iat $, „ ,. m.,.,. n. .tdF4A t ifnla.".l. ill !'' tf
PART F:INDUSTRIAL"USER.DISCHARGES AND RCRA/CEkil-kWASTES,
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject of, an approved pretreatment program?
X Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 4
b. Number of ClUs.
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.6 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Walmart Distribution Center #6091
Mailing Address: 680 Vanco Mill Road
Henderson, NC 27537-7503
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cooling Tower Discharge, truck wash discharge facility washdown
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Frozen Food Distribution, truck maintenance center
Raw materal(s): None
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
20,000 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards ❑ Yes X No
If subject to categorical pretreatment standards, which category and subcategory?
PERMIT ACTION REQUESTED:
RIVER BASIN:
NPDES FORM 2A Additional Information
Supplement Page 18 of 22

Henderson Water Reclamation Facility, NCO020559
Expansion/Renewal
Roanoke River Basin
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
X Yes No If yes, describe each episode.
Foaming and high phosphorus.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ❑ No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLAIRCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
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££s , £ £,: END OF.'PART F
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REFER TO THE APPLICATION'OVERVIEW<(PAGE1)TO. DETERMINE WHICH�OTHER PARTS
£r OF FORM 2A YOU MUST COMPLETE {
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NPDES FORM 2A Additional Information
Supplement Page 19 of 22

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Description of Flow Diagram
Henderson Water Reclamation Facility
The flow enters the plant through 24" and 18" outfalls. It passes through an automatic
3/" barscreen, a grit chamber, and %" manual barscreen. It then passes through a Parshall
Flume with a flow meter and automatic refrigerated sampler.
The flow is then split among six primary clarifiers, then enters two primary trickling filters,
two secondary trickling filters and then six secondary clarifiers. The flow is then pumped to
a pure oxygen activated sludge basin and is split among four final clarifiers.
It is then pumped to four tertiary mixed media filters and flows to a chlorine contact tank,
then a post aeration tank and finally through a UV disinfection system and discharged to the
creek.
The primary, secondary and final sludges are pumped to a DAF for thickening, then to
two pure oxygen aerobic digesters, a heated and mixed primary anaerobic digester, a non
heated and non mixed secondary digester and finally to an aerobic digester where it is
stored until a private contractor can land apply it at agronomic rates.

M
City of Henderson Water Reclamation Facility
Sludge Management Program
The primary, trickling filter secondary and aeration tank activated sludges are processed
though a dissolved air floatation unit and thickened to a range of 4% to 6% solids.
Approximately 10,586 gallons of sludge at 4% to 6% solids are produced daily or
3,863,890 gallons per year.
The sludge is pumped to two pure oxygen aerobic digesters with an average detention
time of 2.4 days.
The sludge is heated in these digesters to a range of 110 degrees F to 130 degrees F by an,
autothermal biological reaction.
The sludge then enters a primary anaerobic digester with recirculation and gas perth
mixing.
The sludge is digested at 95 degrees F to 99 degrees F for an average of 20.8 days in this
digester.
The sludge then enters a secondary anaerobic digester.
The sludge is further digested in this tank at 60 degrees F for an average of 16.4 days.
The sludge is then pumped to a 1,000,000 gallon aerobic digester with an average
detention time of 60 to 80 days,
The stabilized sludge is land applied at agronomic rates to permitted farm land by a
private contractor, Granville Farms, Inc.
The sludge is analyzed monthly for total solids, total volatile solids and pH and quarterly
for compliance.
The undigested sludge is collected at the DAF discharge for testing. The digested sludge
is collected for testing at the discharge of the sludge holding tank that goes to land
application.
In addition, all of the required sludge permit analysis are performed quarterly and TCLP
annually.

Alum sludge from phosphorus removal may be generated in the final clarifiers but at
present Ferrous Sulfate added to the collection system is removing phosphorus.
If alum is used, this sludge will be thickened in the DAF and digested in the pure oxygen
aerobic digesters, primary and secondary anaerobic digesters and the aerobic digester.
The plant still has a 1,000,000 sludge storage tank and 26 sand drying beds that can be
used to store sludge if needed.