NC0024112_Permit Issuance_20090710

LTIFAA
NC®ENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
July 10, 2009
Ms. Leigh A. Conder,
Hamby Creek WWTP Superintendent
The City of Thomasville
P.O. Box 368
Thomasville, North Carolina 27361
Dee Freeman
Secretary
Subject: Issuance of NPDES Permit NCO024112
Hamby Creek WWI?
Davidson County
Dear Ms. Conder,
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North
Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
This final permit includes following major changes from the draft permit sent to you on April 21, 2009:
• Daily maximum limits were added to the permit in response to EPA requirement and base on the 40 CFR
Part 122.45 (d)(2).
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.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748 NorthCarol.i.na
Internet: www.ncwaterquality.org % f��r
An Equal Opportunity 1 Affirmative Action Employer N 6l 1911if

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 Sergei Chernikov at
telephone number [phone].
Sincerely,
J, e� K-
/' Coleen H. Sullins
cc: US EPA, Marshall Hyatt
WSRO-Surface Water Protection
NPDES File
Central Files
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604 one
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748 NorthCarolina
Internet www.ncwaterquality.org a �����r� //, ,
An Equal Opportunity 1 Affirmative Action Employer � �/ L "J

Permit NCO024112
STATE OF NORTH CAROLINA -"
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards. and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and
the Federal Water Pollution Control Act, as amended, the
City of Thomasville
is hereby authorized to discharge wastewater from a facility located at the
Hamby Creek WWTP
110 Optimist Park Road
Davidson County
to receiving waters designated as Hamby Creek in the Yadkin -Pee Dee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III, and IV hereof.
The permit shall become effective August 1, 2009.
This permit and the authorization to discharge shall expire at midnight on April 30, 2014.
Signed this day July 10, 2009.
foleen H. Sullins, Director
n of Water Quality
By Authority of the Environmental Management Commission

Permit NC0024112
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 City of Thomasville
is hereby authorized to:
Continue to operate the existing 4.0 MGD wastewater treatment facility, consisting of a corrun utor,
grit removal chamber, two primary clarifiers, two roughing filters, three fine -bubble aeration basins,
three secondary clarifiers, a 6 MG reaeration lagoon, and chlorine disinfection; and
2. After receiving an Authorization to Construct permit from the Division, construct wastewater treatment
facilities not to exceed 6.0 MGD design flow.
3. Discharge treated wastewaters from said facility into Hamby Creek, a Class C water in the Yadkin -Pee
Dee River Basin, at the location specified on the attached map.

NCO024112 - Hamby Creek WWTP
Latitude: 35050'54" Sub -Basin: 03-07-07
Longitude: 80006'51" Quad #: D18SE
Stream Class: C
Receiving Stream: Hamby Creek
ate
Facility . `gg w ;
Location �.
tNOh Map not to scale

Permit NCO024112
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.0 MGD)
During the period beginning on August 1, 2009 and lasting until expansion above 4.0 MGD flow or expiration, the Permittee shall
be authorized to discharge treated wastewater from Outfall 001 subject to the following effluent limitations and monitoring
requirements:
PARAMETER-,''.1'Monthly
EFFLUENT LIMITATIONS t:
MONITORING_ REQUIREMENTS,
Average :
, .Weekly
Average '
Daly
Maxirnitm- "`
Meisumment
' , Frequencym
Sample
.Type #
Sample `
iocaUont
Flow
4.0 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 5-day, 200C 1 (Apr 1 - Oct 31)
(Nov 1- Mar 31)
5.0 mg/L
10.0 mg/L
7.5 mg/L
15.0 mg/L
Daily
Composite
Influent &
Effluent
Total Suspended Solids '
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
NH3-N, mg/L (Apr 1 - Oct 31)
(Nov 1-Mar 31)
2.0 mg/L
3.0 mglL
6.0 mg/L
9.0 mglL
Daily
Composite
Effluent
Fecal Coliforrn..(geornetric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Dissolved Oxygen
Daily average shall not be less than 6.0 mg/L
Daily
Grab
Effluent._
pH
> 6.0 and < 9.0 standard units at all times
Daily
Grab
Effluent
Temperature, °C
Daily
Grab
Effluent
Conductivity, umhoslcm2
Daily
Grab
Effluent •
Total Residual Chlorine2 (pg/L)
18.0
Daily
Grab
Effluent
Total Phosphorus 3 (mg/L)
Weekly
Composite
Efflue it
Total Phosphorus:3 (Apr 1- Oct 31)
(Nov 1- Mar 31)
3,570 lb seasonal total
5,040 lb seasonal total
Seasonally
Seasonally
Calculated
Calculated
Effluent
Effluet
Total Cadmium (Ng/L)
2/Month
Composite
Effluent
Total Lead (Ng/L)
27.0
34.0
Weekly
Composite
Effluent
Total Nickel (pg/L)
94.1
261.0
Weekly
Composite
Effluent
Total Cyanide4 (Ng/L)
2/Month
Grab
Effluent
Total Chromium (pg/L)
53.5
1022
Weekly
Composite
Effluent
Total Copper (Ng/L)
2/Month
Composite
Effluent
Total Silver (Ng/L)
2/Month
Composite
Effluent
Total Zinc (Ng/L)
2/Month
Composite
Effluent
Total Selenium (Ng/L)
5.3
56.0
Weekly
Composite
Effluent
Total Mercury (ng/L)
13.0
13.0
Weekly
Grab
Effluent
Total Nitrogen
Monthly
Composite
Effluent
Chronic Toxicity5
Ceriodaphnia, P/F @ 90% (6)
Quarterly
Composite
Effluent
Pollutant Scan
Annually
Footnote 6
Effluent
Footnotes:
1. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 % of the respective influent values.
2. Facility shall report all effluent TRC values reported by a NC certified laboratory including field certified. Effluent values below 50 µg/L
will be treated as zero for compliance purposes.
3. Monitoring for total phosphorus shall be conducted and calculated as prescribed above and in Condition A.(3.) of this permit.
4. The quantitation level for cyanide (CN) shall be 10 µg/L. CN levels reported < 10 µg/L shall be considered zero for compliance purposes.
5. Ceriodaphnia P/F @ 90%; February, May, August, November; see Condition A.(5.) of this permit.
6. See Condition A. (6.) and A. (1.) of this permit.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO024112
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (6.0 MGD)
During the period beginning upon expansion above 4.0 MGD flow and lasting until expiration, the. Permittee shall be authorized
to discharge treated wastewater from Outfall 001 subject to the following effluent limitations and monitoring requirements:
PARAMETER• `
EFFLUENT LIMITATIONS , - -,, ,, '
j MONITORING REQUIREMENTS -
Monthly-'
Average .
Weekly.'.
Average
Daily.
Maximum
Measurement.
Frequency
Sample"
: Type
Sample'. ,
"Location .
Flow
6.0 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 5-day, 200C 1 (Apr 1 - Oct 31)
(Nov 1- Mar 31)
4.0 mg/L
6.0 mg/L
6.0 mg/L
9.0 mg/L
Daily
Composite
Influent &
Effluent
Total Suspended Solids 1
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
NH3-N, mg/L (Apr 1 - Oct 31)
(Nov 1- Mar 31)
1.0 mg/L
3.0 mg/L
3.0 mg/L
9.0 mg/L
Daily
Composite
Effluent
Fecal Coliforrn (geometric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Dissolved Oxygen
Daily average shall not be less than 6.0 mg/L
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units at all times
Daily
Grab
Effluent
Temperature, °C
Daily
Grab
Effluent
Conductivity2 umhos/cm
Daily
Grab
Effluent
Total Residual Chlorine3 (Ng/L)
18.0
Daily
Grab
Effluent
Total Phosphorus 3 */L)
Weekly
Composite
Effluent
Total Phosphorus 3 (Apr 1 - Oct 31):,
(N^v 1- Mar 31)
3,570 lb seasonal total
5,0401b seasonal total
Seasonally
Seasonally
Calculated
Calculated
Effluent
Effluent
Total Cadmium (Ng/L) :.
;
2/Month
Composite
Effluent
Total Lead (Ng/L)
26.0
34.0
Weekly
Composite
Effluent
Total Nickel (pg/L)
92.1
261.0
Weekly
Composite
Effluent
Total Cyanide4 (Ng/L)
2/Month
Grab
Effluent
Total Chromium (Ng/L)
52.3
1022
Weekly
Composite
Effluent
Total Copper (Ng/L)
2/Month
Composite
Effluent
Total Silver (Ng/L)
2/Month
Composite
Effluent
Total Zinc (Ng/L)
2/Month
Composite
Effluent
Total Selenium (Ng/L)
5.2
56.0
Weekly
Composite
Effluent
Total Mercury (ng/L)
13.0
13.0
Weekly
Grab
Effluent
Total Nitrogen
Monthly
Composite
Effluent
Chronic Toxicity5
Ceriodaphnia, P/F @ 90%
Quarterly
Composite
Effluent
Pollutant Scan
Annually
Footnote 6
Effluent
Footnotes:
1. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 % of the respective influent values.
2. Facility shall report all effluent TRC values reported by a NC certified laboratory including field certified. However, effluent values
below 50 µg/L will be treated as zero for compliance purposes.
3. Monitoring for total phosphorus shall be conducted and calculated as prescribed above and in Condition A.(3.) of this permit.
4. The quantitation level for cyanide (CN) shall be 101Lg/L. CN levels reported < 10 µg/L shall be considered zero for compliance purposes.
5. Ceriodaphnia P/F @ 90%; February, May, August, November; see Condition A.(5.) of this permit.
6. See Condition A. (6.) and A. (7.) of this permit.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO024112
A. (3.) INSTREAM MONITORING REQUIREMENTS
(a) Beginning - on the effective date of this permit and lasting through the expiration date, the
Permittee shall perform instream sampling upstream and downstream of Outfall 001 as specified
below, unless exempted per paragraph (b) below:
PARAMETERS°
SAMPLE TYPE'
",
NGFREQUENCY MOIVITORI
SAMPLE
LOCATION (t>
Jun 1-Sep 30
Oct 1- May 31
Temperature
Surface
3/week
Weekly
U, D
Dissolved Oxygen
Surface
3/week
Weekly
U, D
Fecal Coliform
(geometric mean)
Surface
3/week
Weekly
U, D
Conductivity
Surface
3/week
Weekly
U, D
Total Phosphorus
Surface
Monthly
Monthly
U, D
TKN
Surface
Monthly
Monthly
U, D
NH3-N, as N
Surface
Monthly
Monthly
U,.D
NO2-N + NO3-N
Surface
Monthly
Monthly
U, D
Chlorophyll -a .
Surface
Monthly
Monthly
D
Footnotes:
(1) Sample locations: U - Upstream at Baptist Children's Home Road, D - Downstream at SR
2017 and on Abbotts Creek at Center Street below the confluence with Leonard Creek.
(b) Coordinated Instream Monitoring Program, Yadkin -Pee Dee River Basin Association. The
Permittee shall be provisionally exempted from the instream monitoring requirements specified in
paragraph (a) above, so long as the Permittee remains a party in good standing in an active
instream monitoring Memorandum of Agreement signed with the Division. If the Permittee's
participation in the MCA is terminated, the requirements in paragraph (a) shall be reinstated
immediately and automatically.
(c) Notification of Terminated Membership. If the Permittee's participation in the MCA is
terminated for any reason, the Permittee shall notify the Division in writing within five (5)
working days, unless the termination is initiated by the Division.

Permit NCO024112
W
A. (4.) TOTAL PHOSPHORUS MONITORING
The Permittee shall calculate the seasonal mass loading of total phosphorus as the sum of monthly loadings,
according to the following equations:
(a) Monthly Mass Loading (pounds/month) = TP x Q x 8.34
where: TP = the average total phosphorus concentration (mg/L) of the
composite samples collected during the month
Q = the total volume of wastewater discharged during the month at
each outfall (MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
(b) Seasonal Mass Loading (pounds/season) _ Y_ (Monthly Mass Loadings) for the
season
The Permittee shall report the total phosphorus concentration for each sample and the monthly mass
loading in the appropriate self -monitoring report and the seasonal mass loading of total phosphorus in ,the
final self -monitoring report for the season.
A. (5.) 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 90.0% (at 6.0 MGD).
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" (Revrised-February
1998) or subsequent versions. The tests will be performed during the months of February., May, August
and November. Effluent sampling for this testing. shall be performed at the NPDES permitted final
effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the
highest concentration having no detectable impairment of reproduction or survival and the lowest
concentration that does have a detectable impairment of reproduction or survival. The definition of
"detectable impairment," collection methods, exposure regimes, and further statistical methods are specified
in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998)
or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B
for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to
be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621

Permit NCO024112
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, this permit may be re -opened and
modified to include'alternate monitoring requirements or limits. i
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT
Forms submitted.
NOTE:, Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than, the Kist.
day of -the month following the month of the initial monitoring.
A. (6.) NON -DETECTION REPORTING AND DETERMINATION OF COMPLIANCE
When pursuant to this permit a pollutant analysis is conducted using an approved analytical protocol with
the appropriate minimum detection level and a result of "non -detectable" or "below quantitation limit" is
obtained, the Permittee shall record that result as reported. For the purpose of determining compliance with
a permit limit for the pollutant, the numerical value of that individual analytical result shall be zero.

Permit NCO024112
A. (7.) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table (using a sufficiently sensitive
detection level in accordance with 40 CFR Part 136). Samples shall represent seasonal variations. Unless otherwise indicated, metals shall be
analyzed as "total 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-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1,1,1-trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chrornium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Aad-extractable m%m ormde•
Diethyl phthalate
Mercury
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver t
2,4-dimethylphenol
1,2-diphenylhydrazine
Thallium
4,6-dlnitro-o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nit4henol
Hexachlorobutadiene
Volatile =anic com�oundr:
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-trichlorophenol
Indeno(1,2,3-cd)pyrene
Benzene
Bare -neutral onormdc
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-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

% `
FACT SHEET - NPDES PERMIT
Page 1
Facili
Facility Name:
Permitted Flow
(MGD):
Facility Class:
Facility Status:
Permit Status:
County:
Regional Office:
USGS Topo
Quad:
SUMMARY:
Hamby Creek WWTP
6.0
IV
Existing
Major Modification.
Expansion to 6.0 MGD
Davidson
Winston-Salem
D 18SE
Fact Sheet - NPDES Permit
City of Thomasville
NPDES No. NCO024112
Receiving, Stream
Receiving
Stream: Hamby Creek
Subbasin:
Index No.:
Stream Class:
303(d) Listed:
Use Support:
Drainage Area
(miz):
Summer 7Q10
(cfs)
Winter 7Q10
(cfs):
30Q2 (cfs):
Average Flow
(cfs):
IWC (%):
030707
C
Yes
Impaired (nutrients, Cu, and
biological -integrity)
13.3
0.43
1.3
1.7
12.0
96
The City of Thomasville owns and operates a 4.0 MGD activated sludge wastewater treatment plant,
it is currently undergoing an expansion to 6.0 MGD. Project also includes major improvements,
including biological nutrient removal, which is needed to meet new TP limit. This facility is a major
municipal treatment plant that serves 20,050 people. City has a separate sewer. collection system.
Waste sludge is anaerobically digested and then applied to land under Non -Discharge Permit No.
WQ0006050. The City administers an industrial pretreatment program to control the discharge of
industrial and commercial wastes into its collection system and treatment works. Industrial sources
include 8 Significant Industrial Users. The permit will continue to require the City to implement its
pretreatment program
The Thomasville WWTP discharges treated municipal wastewater to Hamby Creek, a Class C water_
in the Yadkin -Pee Dee River basin. General water quality is rated as Poor and Fair in this portion of
the basin, due both to point source dischargers and nonpoint source runoff. Hamby Creek is
impaired due to elevated levels of fecal coliforms. Currently, a TMDL is being developed to address
this issue.
I

FACT SHEET - NPDES PERMIT
Page 2
REASONABLE POTENTIAL ANALYSIS
Reasonable potential analysis was conducted for: Ag, Al, As, Cd, Cr, Cu, CN, Sb, Pb, Hg, Mo, Ni,
Se, and Zn. (please see attached).
TOXICITY TESTING:
Type of Toxicity Test: Chronic P/F
Existing Limit: 001: Chronic P/F @ 90%
Recommended Limit: 001: Chronic P/F @ 90%
Monitoring Schedule: February, May, August, November
COMPLIANCE SUMMARY:
Facility has a negative compliance record with numerous violations of many monitored parameters.
During the last permit cycle the facility has been working on the expansion and improvement of the
plant, which should alleviate existing compliance problems.
INSTREAM MONITORING:
Instream monitoring is required for temperature, dissolved oxygen, fecal coliform, conductivity,
total phosphorus, TKN, ammonia nitrogen, nitrate + nitrite nitrogen, and chlorophyll -a.
1
PROPOSED CHANGES:
• Limits. Based on the Reasonable Potential Analysis both limits for Cd have been removed,
daily maximum limit for Cr was removed, daily maximum limit for Se was removed, limits for
Hg and Pb were added.
• Monitoring Frequencies.* Monitoring frequency for Cd has been reduced to 2/Month due. to
the removal of the limits. Monitoring frequencies for Hg and Pb were increased to weekly due
to the addition of the limits.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: April 21, 2009 (est.)
Permit Scheduled to Issue: ,June 14, 2009 -(est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact
Sergei. Chernikov at [phone].
REGIONAL OFFICE CMUMENT:
NAME: DATE:

REASONABLE POTENTIAL ANALYSIS
Hamby Creek WWTP
NC00
Time Period 2006-2009
Ow (MGD) 4
WWTP Class IV
7010S (cfs) 0.43
/WC (%) @ 7010S 93.514
7010W (cfs) 1.3
@ 701OW 82.667
3002 (cfs) 1.7
@ 3002 78.481
Avg. Stream Flow, QA (cfs) 12
@ QA 34.066
Rec'ving Stream Hamby Creek WWTP
Stream Class C
Outfall 001
Qw = 4 MGD
STANDARDS&
PARAMETER
TYPE
CRITERIA (2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
Nc Wos / V. FAY/
n a Dot Max prod Cie Allowable tea
(1)
chronic Acute
Acute: N/A
Arsenic
C
50
ug/L
14 0
2.5
_ _ _
_no limit _ _ _ _ _ _ - _ _ _ _ _ _ _
Chronic: 147
Acute: NIA
no limit
Aluminum
C
8000.0
ug/L
10 7 2036.6
_ _ _ _ _ .................................
Note: n<12
Chronic: 23,484
Limited data set
I
Acute: 15
Cadmium
NC
2 15
ug/L
60 0
1.0
remove the limit _
—_
j Chronic: 2
— — — — _-_-_ _ _ _ _
reduce the monitoring to 2/Month
Acute: 1,022
keep the weekly average limit
Chromium
NC
50 1,022
ug/L
59 8
209.2
_ _ _ __
Chronic: 53
I
_ _ _ _ _ _ _ _ _ _ _ _ _ _
remove the daily maximum limit
Acute: 7
Copper
NC
7 AL 7.3
ug/L
31 25
1113.0
no limit _ _ _ _ _ _ _ _ _ _ _ _ _
Chronic: 7
action level standard
Acute: 22
Cyanide
NC
5 N 22
10
ug/L
28 2
5.0
no limit-_-_ _ _ _ _-_-_ _ _ _ _ _
Chronic: 5
Acute: N/A
Antimony
NC
640
ug/L
14 0
12.5
--_._-_-_-
noliimit-_-_-_-_-_-_-_-_---_-----_
Chronic: 684
Acute: 34
add the limit
Lead
NC
25 N 33.8
ug/L
30 2
36.0 li_
_ _ _ _ _ _
--_ _
_ _ _ _
Chronic: 27 -
-- _ _
increase the monitoring to weekly
I Acute: N/A
Mercury
NC
12
2.0000
ng/L
16 13
141.4800 j_ _ _ _ _
add the limit
Chronic: 13
increase the monitoring to weekly
i Acute: NIA
Molybdenum
A
3,500
ug/L
14 0
6A j_ _ _ _ _
no limit ___ _ _ _ _ _ _ _ _ _ _ _
Chronic: 4,460
Acute: 261
keep the limit
Nickel
NC
88 261
ug/L
59 56
845.8
_ _ _ _ _
Chronic: 94
------------------------------
Acute: 56
keep the weekly average limit
Selenium
NC
5.0 56
ug/L
59 2
13_
_ ___
___ _ _ _ _ _ _-_ _ _ _ _ _
Chronic: 5
remove the daily maximum limit
Acute: 7
Silver
NC
0.06 AL 1.23
ug/L
32 1
8.0
�_ _ ___
no limit _ _ _ _ _ _-_ _ _ _ _ ___
Chronic: 0
action level standard
Acute: 67
Zinc
NC
50 AL 67
ug/L
31 31
590.5
no limit _ _ _ _-_-_-_-_ _ _ _ __
Chronic: 53 jaction
level standard
Legend., Freshwater Discharge
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
24112-rpa-4 mgd-2009.xls, rpa
4/16/2009

REASONABLE POTENTIAL ANALYSIS
Hamby Creek WWTP
NCOO
Time Period 2006-2009
Quit (MGD) 6
WWTP Class IV
7Q10S (cfs) 0.43
IWC (%) @ 7Q10S 95.581
7Q10W(cfs) 1.3
@ 7Q10W 87.736
30Q2 (cfs) 1.7
@ 30Q2 84.545
Avg. Stream Flow, QA (cfs) 12
@ QA 43.662
Rec'ving Stream Hamby Creek
Stream, Class C
Outfall 001
Qw = 6 M GD
STANDARDS 8
PARAMETER
TYPE
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCWQS/ %FAVr
n #Dnt htrx Prod Cw All—bl. Cw
(1)
I
" f
Chronic Acute
,
Acute: N/A
Arsenic
C
50
ug/L
14 0
2.5
_ __
nolimit _--- _ _ _ — — --___
Chronic: 115
_
Acute: N/A
no limit -
Aluminum
C
8000.0
ug/L
10 7 2036.E
_ _ __ _
---
_ ` -�—_—_—_—_—___ ---
-------- — ----
Note: n<12
Chronic: ,323
_
'
Limited data set
Acute: 15
-
Cadmium
NC
2 15
ug/L
60 0
1.1
---2 -
remove. the limit - — —_—_ _—_
--------- -- — --- ---
Chronic:
reduce the monitoring to 2/Mohth
Acute: 1.022
keep the weekly average. limit
Chromium
NC
50 1,022
ug/L
59 8
209.2
_ _ _ __
_ _______—__
Chronic: 52
removethedailymaximum-limit
Acute: 7
- -
Copper
NC
7 AL 7.3
ug/L
31 25
1113.0
_ ____
no limit _ _ _ — —_—_—---____
Chronic: 7
action level standard
Acute: 22
- -
Cyanide
NC
5 N 22
10
uglL
28 2
5.0
I---------_
n
----_ _-----_—_—_—----_—_
iChronic: 5
,
Acute: N/A
Antimony
NC
640
ug/L
14 0
12.5
_ __
_noli_mit_. _ --_ _ -----
Chronic: 670
- -
Acute: 34
add the limit .
Lead
NC
25 N 33.8
ug/L
30 2
36.0
—C
-- __—_ --- _ _—_—_
— —
Chronic:__26
- .—
increase the monitoring towee kly
Acute: N/A
Mercury
NC
12
2,0001
ng/L
16 13
141.4800
__
add the limit,
_ _ _
Chronic: 13
Increase the �rnonitoring to weekly ,
Acute: N/A
Molybdenum
A
3,500 -
ug/L
14 0
6.4
_ _ _
no limit-, - _ _ __ - _ _ _
Chronic: 4,140
Acute: 261
keep the limit -
Nickel
NC
88 261
ug/L
59 56
845.8
-
—--------------------- — ---
Chronic: 92
Acute: 56
keep the weekly avbiage limit. '',1
Selenium
NC
5.0 56
ug/L
59 2
7.3'_
_ '_ _ ______
Chronic: 5
_ ___-
removethe;dailymaximumaimib. =.
Acute: 1
-
Silver
NC
0.06 AL 1.23
ug/L
32 1
8.0
no limit - _ _ -----------------------
_ _ ____
Chronic: 0
action level standard
Acute: 67
Zinc
NC
50 AL 67
ug/L
31 31
590.5
_ _ _
noiimrt._
Chronic: 52
action level standard
- f
Legend: "Freshwater Discharge
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
24112-rpa-2009.xis, rpa
4/16/2009

REASONABLE POTENTIAL ANALYSIS
Arsenic
Aluminum
Date
Data
BDL=1/2DL
Results
Date
Data
BDL=1/2DL
Results
1
P
5
2.5
Std Dev.
0.0000
1 �.
286
286.0
Std Dev.
131.1486
2
5
2.5
Mean
2.5000
2
50
25.0
Mean
133.8000
3
5.
2.5
C.V.
0.0000
3 , .
70
70.0
C.V.
0.9802
4
5
2.5
n
14
41.
:;_
76
76.0
n•
10
5
<
5
2.5
5 ;'
397
397.0
6<
5.
2.5
MultFactor=
1.0000
6
r
50
25.0
MultFactor=
5.1300
7
rc
5
2.5
Max. Value
2.5 ug/L
7
<
50
25.0
Max. Value
397.0 ug/L
8
<
5:
2.5
Max. Pred Cw
2.5 ug/L
8
6-
66
66.0
Max. Pred Cw
2036.6 ug/L
_
9
�f
�.
5
2.5
9 , � -
254
254.0
105
,.
5
2.5
10
t
114
114.0
11
<;
5
2.5
11,
y
12<
5
2.5
12, -
13
<
5
2.5
13
14
<
5
2.5
14
15
a
-
15 '.
16.
x
16
17
t
17?
18
xl
-
'
(
20
21
211
22
22 -
23
it
23,
24
24
25
25
26
� --
26
t -e
27
l q
`.
27,'
28
28
t �o
29
i'
O
29
t
30
a ;y
30 '
n
r et
31
°
31
991
32
32
33
h-
33.
34
-
34 ..
35
a
35,
3
36:
F=
361 ,
1
37
37 '
$r
38
!
38
.
39
�`
39.
40
t
40 ,
,
fs
41
15
41
r.; z
42
t�
42
g
43
N
43,:
44
¢¢
4446 ,
l.y
46
47
47
48.-
48
v°
-
49
49
50
�`=I
50
51;.
51
r
t
52
j .
.
52
r ,.
531
53
54
54 .
t ,
55
E*
55
56
.
56
�
p
57
57
58
58
59
59
60
60 T i
,.
199
;
199 r
200';--
200
n .
24112-rpa-2009.xis, data
-1 - 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Cadmium
Chromium
Date
Data
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
1<
2
1.0
Std Dev.
0.0000
1
< F St
2.5
Std Dev.
12.9360
2
<#�
2•
1.0
Mean
1.0000
2
< 5
2.5
Mean
6.1271
3
! <3
2.
1.0
C.V.
0.0000
3
.6
6.0
C.V.
2.1113
4
<
2
1.0
n
60
4
< 5
2.5
n
59
5<
'.
2
1.0
5<
5
2.5
6
2
1.0
MultFactor=
1.0000
6
5
2.5
MultFactor=
3.1700
7
<
2"
1.0
Max. Value
1.0 ug/L
_'
7 .,
5
2.5
Max. Value
66.0 ug/L
8 '""<
2.
1.0
Max. Pred Cw
1.0 ug/L
8
< 5
2.5
Max. Fred Cw
209.2 ug/L
Ct
k� '
10
2'
1.00
10
5
2.5
11
2'
1.00
11<
5
2.5
12
<_
2
1.00
12
5
2.5
13<°
2
1.00
13
r 5
2.5
14
E<
2•
1.00
14 "'
�< 5
2.5
15
2
1.00
15
< ., 5
2.5
16<
17
} tl
<
2
2
1.00
1.00
16
17
5
5
2.5
2.5
18
[<;
2
1.00
18<
5
2.5
19
r <?
2
1.00
19
1"" - '- 5
2.5
20
_.v
<
2
1.00
20
4 5
2.5
21
<
2
1.00
21
5
5.0
22
'1
2'
1.00
22<
5
2.5
23
«
2'
1.00
23
< '_ 5
2.5
24
<
2
1.00
24#<
5
2.5
25<
2
1.00
25
k<'_- 5
2.5
26
�c
2
1.00
26
< 5
2.5
27
t<
2
1.00
27<Z,"
5
2.5
28
, <
[ <
2
1.00
28<
. 5
z
2.5
29
2
1.00
29
5
2.5
30
<
2
1.00
30
€ <; - 5
2.5
31<
2
1.00
31
< 51
2.5
32<
2
1.00
32
5
2.5
33<k
2
1.00
33
10.0
10.0
34
[ «
2
1.00
34
< 5
2.5
35
4`
2
1.00
35
[ < ,,, 5
2.5
36<
2'
1.00
36<t
S
2.5
37
<
2
1.00
37
< 5
2.5
38
<<j
2
1.00
38
< 5
2.5
39
(c
2
1.00
39
< 5
2.5
40
<
2
1.00
40
< 5
2.5
41
2
1.00
41
5
2.5
42 .
;
2;
1.00
42
< 5
2.5
43
«
2'
1.00
43
5
2.5
44
2
1.00
44
' 6.0
6.0
45
2'
1.00
45
g� ' 32.0
32.0
46
<
R '.•
2,
1.00
46<
5
2.5
47
48
<
<
2
2
1.00
1.00
47
48
t - 48.0
5
48.0
2.5
49
<
2•
1.00
49
< $
2.5
50
2'
1.00
50 `
':- < 5
2.5
51
<
2
1.00
51
. 61.0.
61.0
52
<
2`
1.00
52 ::<
5
2.5
53
<
2'
1.00
53
< 5'
2.5
54
<g
2•
1.00
54
`- L 66.0
66.0
55
2'
1.00
55
5
2.5
56
<'
2'
1.00
56
< 5
2.5
57
<;
2!
1.00
57
5:'
2.5
58
e
" 2;
1.00
58 ;"
< 5'
p
2.5
59
<
2.
1.00
59
5
2.5
60
2.
1.00
60
�<
199
199
u
200
200:
24112-rpa-2009.xls, data
-2- 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Copper
Cyanide
Date
Data
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
1
<
5
2.5
Std Dev.
43.0119
1 L<� 5
5.0
Std Dev.
0.0000
2
5
2.5
Mean
19.1613
2<"5
5.0
Mean
5.0000
3
��,
S
10
10.0
C.V.
2.2447
3 ' 5`
5.0
C.V.
0.0000
4
L %q
8
8.0
n
31
�<`
#
4 <{ 5
5.0
n
28
5
5
2.5
55,
5
5.0
5.0
MultFactor=
1.0000
6
�
10
10.0
MultFactor=
5.2500
6 l<
I�<
5.0
Max. Value
5.0 ug/L
7
7
7.0
Max. Value
212.0 ug/L
7 5
8
e
12
12.0
Max. Pred Cw
1113.0 ug/L
8 < _ 5
5.0
Max. Pred Cw
5.0 ug/L
9
�y
7
7.0
9 < 5
5.000
10 '`
k
11
11.0
10 '' .5
5.000
11
7
7.0
5
5.000
12
t j
15
15.0
12 c 5
5.000
13
8
8.0
13 ��< 5
5.000
14d
7
7.0
14 8< 5
5.0
15<
5
2.5
15 < 5
5.0
_
lkz?16
8
8.0
16 S
5.0
17
<'
i
5
2.5
17 < 5
'.
5.0
18 -
�
L
11
11.0
18 �� � 5
5.0
19
6
6.0
19 5-
5.0
20
7
7.0
20 4 5
5.0
21
�v
7
7.0
21 <' 5'
5.0
22,
�
6
6.0
22 ' _ 9:
5.0
23
7
7.0
23; $.:
5.0
24
.2
36
36.0
24, < ` ,5
5.0
25
137
137.0
25 < 5
5.0
26{
12
12.0
26 5`
5.0
27
7
7.0
27 <, .. .,5
5.0
28
212
212.0
28 < 5
'
5.0
29
; ";
9
9.0
29
30
«
5
2.5
30
31
�� ��
12
12.0
31 �
32
32 a
33
33
34
! T°;
34 ..
35
�<
x
35 �y
36
a
38
37
w
37
38
38
39
u._ ;
39'
40
40
41
41 r
42 . "
k'K
42 G
43 :
43'. :' Gffl
44-.-
44,
45
6
45
46
r , °
b
46 t
47
47
48 .
€ ;
48 ;
49 '' ..
r
49
50
s�
50 ° x
51,
51,
52„
r _
52..1
53
53 4
54
, $
5Al
4
55
a.
E ,
55
56
�
56 `
57,:'
57 t
58
58t
59
59 r
60
60
199
199
200
m
200
24112-rpa-2009.xls, data
- 3 - 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Antimony
Lead
Date
Data
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
1
`
25
12.5
Std Dev.
0.0000
1
2.5
Std Dev.
2.4614
2
- 25
12.5
Mean
12.5000
2
�5'
2.5
Mean
3.1000
3
t,
25
12.5
C.V.
0.0000
3
.�
2.5
C.V.
0.7940
4
��
25
12.5
n
14
4
< 5-
2.5
n
30
5`<
25
12.5
5
C < 5.
2.5
6
<
25•
12.5
Mult Factor =
1.0000
6
.; r �4 5,
2.5
Mu It Factor =
2.4000
7 -<
25
12.5
Max. Value
12.5 ug/L
7
< : 5
"5
2.5
Max. Value
15.0 ug/L
8
<
25
12.5
Max. Pred Cw
12.5 ug/L
8
<
2.5
Max. Pred Cw
36.0 uglL
9
<
`c
25
12.5
9
< ` ;5
2.5
10
25
12.5
10-
<. 5
2.5
11
<
25
12.5
11
5
2.5
12
<r
25
12.5
12 ,
< ' `5
2.5
13
<
25
12.5
13
,5
2.6
14
u <
25
12.5
14<
"• 5
2.5
15
15.1
,-8
8.0
16
16
< 5'<
2.5
17
17
<� 5
2.5
18
t ',
18
< 5'
2.5
19
k
19
5
2.5
'
20
20
< 5
2.5
21s
21
S
�.<� � 5
2.5
22
22<
51
2.5
23
l
23
< , 5
i
2.5
24
24
1'S
15.0
25M1
25
f < 5
2.5
26
26
_ rc 5'
2.5
27
27
Y < 5'
- 2.5
28
28
< 5
2.5
29 ,
29
< 5
2.5
30Np1i
30
< 51
2.5
31
"
31
32
t s#S
32
w
33
33
}
34
35
1
34
35
a�
1
37
37
38`'
38
39
39
M
40
r ,a
40
r
41
H41
42
42
1 ..
43
43
LVA
44e
44
'
Ar
45
45
`
46
I ;
46
47
<
47
48
48
°
49
k
49
A
50
50
u
51
51
52
52
a
53
P
53
54
54
9
55
i t
55,
56
56
�
57
r
57
58
E
58
59
59
60
60
199
y
199�121
24112-rpa-2009.x1s, data
4- 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Mercury
Molybdenum
Date
Data
BDL=1/2DL
Results
Date
Data
BDL=1/2DL
Results
1
t,$
1.57
1.00
Std Dev.
7.5907
1 -
-
% . 5.
2.5
Std Dev.
0.67
2
2.40.
2.40
Mean
5.5994
2 ; , •<
10.
5.0
Mean
4.82
3
54
1.18
1.00
C.V.
1.3556
3
<
10
5.0
C.V.
0.14
4
<
1.00
1.00
n
16
4 ' ,
<
10.
5.0
n
14
5
<;
1.00
1.00
5
10,
5.0
6
f<
1.00
1.00
MultFactor=
5.40
6<
.10
5.0
MultFactor=
1.2700
7
t
2.74
2.74
Max. Value
26.2 ng/L
7
!<
10
5.0
Max. Value
5.0 ug/L
8
tW
2.32
2.32
Max. Fred Cw
141.5 ng/L
8 .
<
�4
10
5.0
Max. Fred Cw
6.4 ug/L
9
4.98
4.98
9
10'
5.0
10
2.73
2.73
10•
?;10
5.0
11
Mar-2008
w `i
16.10
16.10
11
<
10
5.0
12
Feb-2008
° -
18.00
18.00
12
< ,
10
5.0
13
5.85
5.85
13 '
<
10
5.0
14
Dec-2007
26.20
26.20
14
<',
10'
5.0
15
Cr
2.27
2.27
15 :.
16
1.89
1.00
16
17
k.;
17 '
18
18:.
19!
19 -
x
.�,
-
..
22
22
-
23
rc•' _
23
24
24`'
25
25 _
¢
264
26
27
+
27
28
28
29
29
30
•(,
30
31
I• r,µ
�
31 '
r
32
32
#v
33
33
34
(
34 ;
35
( :?
35
1
36
36
q},
37
37
38
P
38. .
39
Ft
39
40
k `
40
t
41
¢_
41-'
42
42
43
E .;"
43
45
I '2
45'
{
(:Y46-
47
k `
47
48
48
.`
49
49
L
-
50
50
51
51
}
,
53
53
54
54
55}
(
55
s
56
t ,1
i
56
57
57
58
58
59
59
i
60
60
199
199
200
,,
200;.:.
'
24112-rpa-2009.xls, data
- 5 - 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Nickel
Selenium
Date
Data
BDL=1/2DL
Results
Date - Data
BDL=1/2DL
Results
1
-
14
14.0
Sid Dev.
37.6335
1 ',
2.5
Std Dev.
0.5654
2
9
9.0
Mean
19.6017
2< 5
2.5
Mean
2.6017
3
4
{
l
10
10.0
C.V.
1.9199
3< 5
2.5
C.V.
0.2135
10
10.0
n
59
4 < 5
2.5
n
59
5
-<
101
101.0
5 c 5:
2.5
6
16
16.0
MultFactor=
3.0100
6 < 5
2.5
MultFactor=
1.2100
7
13
13.0
Max. Value
281.0 ug/L
7 < S
2.5
Max. Value
6:0 ug/L
8"-.
16
16.0
Max. Pred Cw
845.8 ug/L
8 c 5,
2.5
Max. Pred Cw
7.3 ug/L
9
10
.5
5.0
9 "5,
2.5
8
8.0
10`.< '.5`
_ 2.5
11
6
6.0
11��'5:
2.5
12.
<
5
2.5
12 { 5
2.5
13
3'
9
9.0
13 < 5
2.5
14
6
6.0
14 5'
2.5
15<
5
2.5
15
2.5
16'
I
(
7
7:0
16 5
2.5
17
8
8.0
17 .' 5
2.5
18
9
9.0
18 5
2.5
19
12
12.0
19 f 5
2.5
20
t
,' 9
9.0
20
2.5
21
n.
9
9.0
21 6' `
6.0
22
}
12
12.0
22 ' - . < 5.
2.5
23
12
12.0
23 < 5
2.5
24
"-
7
7.0
24 = ,;<5 5j
2.5
25
9
9.0
25 < 5"
2.5
26
8
8.0
26 < &
2.5
27
12
12.0
27 < 5
2.5
28
C
10
10.0
28 < 5
2.5
29 -
12
12.0
29 4,. 5.
2.5
30,
13
13.0
30<; 5
2.5
31
f
11
11.0
31 I~z' 5'
2.5
32
Y
13
13.0
32 itE < 5
2.5
33
i
14
14.0
33 4< 5
2.5
34,
13
13.0
34 < 5
2.5
35'
"i
13
13.0
35 < 5'
2.5
36
9
9.0
36 { < 5.
2.5
37
I
8
8.0
37 < -5
2.5
38
` '-
18
18.0
-
38 5
� .
2.5
39 .
��;;�
16'
16.0
39 < 5
2.5
40
%
19
19.0
40 8'
2:5
41
15
15.0
41.1< 5.
2.5
42
r
5
2.5
42< 5
2.5
43
".
7
7.0
43 - < 5
2.5
44
15
15.0
44< 5
2.5
45
20
20.0
45 14< 5.
2.5
46
10
10.0
46 t < 5
2.5
47
yr
50
50.0
47 5
2.5
48
l
42
42.0
48 t c 5'
2.5
49 iN
25
25.0
49< 5!
2.5
50
14
14.0
50<5-
2.5
51 Feb 2008
281
281.0
51 - < '5
2.5
52
'1
20
20.0
52 < _a
2.5
53
14
14.0
53 < 5i
2.5
54
53
53.0
54 5
2.5
55
20
20.0
55 < 'S
2.5
56
7
7.0
t
56<� 5'
2.5
57
��
19
19.0
57 I" 5 '
5.0
58
17
17.0
58
2.5
59
14
14.0
59 5`
2.5
60
60
199
200_
-
199 '
200
24112-rpa-2009-xis, data
- 6 4/16/2009

REASONABLE POTENTIAL ANALYSIS
Silver
Zinc
Date
Data
BDL=1/2DL
Results
Date Data
BDL=1/2DL
Results
1<
5.
2.5
Std Dev.
0.6187
1 40
40.0
Std Dev.
45.5350
2 .
-<
5
2.5
Mean
2.6094
2 * 45
45.0
Mean
63.3548
3<
5`
2.5
C.V.
0.2371
3 48
48.0
C.V.
0.7187
4
4
5
2.5
n
32
4 x 4T
47.0
n
31
5
?
k,<
5;
2.5
¢
5 � �; 72`
72.0
6<,
5
2.5
Mult Factor =
1.3300
,
6 52
52.0
Mult Factor=
2.2200
7
a�
e
5
2.5
Max. Value
6.0 ug/L
753
53.0
Max. Value
266.0 ug/L
8
5
2.5
Max. Pred Cw
8.0 ug/L
8 1O5.
105.0
Max. Pred Cw
590.5 ug/L
9t
5
2.5
9 38'
38.0
10
<
5
2.5
10 46�
46.0
11
<
5
2.5
11 1 44
44.0
12
N295
2.5
121 60,
60.0
13
6 <
5
2.5
13 4T
470
14
<;
5
2.5
14� 51.
51.0
15
c}
5
2.5
15
50.0
16
ERZ,
5
2.6
5" -
16 "82s
82.0
17'<
5
2.5
17 50
50.0
18�
5
2.5
18 84'
84.0
19
5•
2.5
19 68`
62
68.0
62.0
20<
21<
5
5
2.5
2.5
20 '�
21 f4 60
60.0
22
E
5.
2.5
22 _" 9 ti8
68.0
23
< 4,
5
2.5
23 x ; 32
32.0
24
-
Vc4
5
2.5
24 `84°
84.0
25
5
2.5
25 2Ei6'.
266.0
26
2c'w
6
6.0
26 ' 44,
44.0
27
<
5
2.5
27 ; 17
17.0
28
<
5
2.5
28 NU,27'
27.0
29
<w
a=x•
5
2.5
29 30
30.0
30
<=
5
2.5
30 152
152.0
31
<
5
2.5
31 40
40.0
32
S
r �t
�r
5
2.5
32 g a
�
33
33
34
Q
34
35
35�
36
36 = 3
37¢
37 .$
38
t
38
39RA40
y
'
40
x
41
FY
41 _ €"
42
43
rp
42 e
43�
45
45 Tyre
46
46
47
.
47 _
48,
48�
49 .
.
..,
49
50,,
p"kiff
50
51t
51
52<,
52
53
��
53 �
54
VS •
54 IVA
55
qi
55
56
56
57
574
58
58
.
i
59
59
60
z
60
199
199
200
.,
2
00
24112-rpa-2009.xls, data
- 7 - 4/16/2009

Chernikov, Sergei
From: [e-mail]
Sent: Thursday, June 04, 2009 10:11 AM
To: Chernikov, Sergei
Subject: RE: comments on NC0024112, Thomasville Hamby Creek
Thanks for your responses. EPA has no comments on this draft permit.

Chernikov, Sergei
From: Hyatt. [e-mail]
Sent: Wednesday, May 20, 2009 3:23 PM
To: [e-mail]
Cc: Bon [e-mail]; [e-mail]
Subject: comments on NC0024112, Thomasville Hamby Creek
Sergei:
I apologize for getting these to you so late in the 30-day review period. Please email your
response when you can.
Marshall
1. In reviewing the fact sheet's reasonable potential assessment for copper and zinc and the
facility's WET DMR results, there were consecutive chronic WET failures in August and
September 2007. Our files contain a copy of an 11/28/07 letter from NC to the facility
indicating that the facility must decide by 1/2/08 whether to accept copper and zinc limits
or pursue alternatives based on these WET
failures. We have no record of what the facility decided. The only
subsequent WET result in PCS is from 2/08 and is a pass. This information alone does not
support NC's conclusion that copper and zinc
limits are not needed. If you are aware of what the facility decided
(and the ultimate results if they pursued regulatory relief), please let me know.ji"`
2. For chromium, selenium, and mercury, I understand how you concluded that no daily maximum
was needed based on your RPA. Based on that conclusion, the only limit you have for these
parameters is a weekly average. However, 40 CFR Part 122.45(d)(2) requires that all POTWs
contain both monthly average and weekly average limits. For other
parameters in this permit, your use of both weekly average and daily maximum limits is more
stringent than the NPDES regulation and is acceptable. For these three parameters, adding
either a monthly average or daily maximum limit equal to the weeky average limit would be pp��
acceptable. 0—
3. For mercury, shouldn't Parts A.1 and A.2 require grab sampling and use of EPA Method
1631E to assess compliance? O
VYL-
1

Winston-Salem Journal
Advertising Affidavit Account Number
3425332
Winston-Salem Journal
Date
P.O Box 3159
Winston-Salem, NC 27102 CEj\jE1D
4, 2009
NCDENR/DWQ/SURFACE WATER PROTECTION IZE
ATTN: JOVONAH D. WEEDEN
1617 MAIL SERVICE CENTER ppR 2 $
RALEIGH, NC 27699-1617
WATER ovAu�
R N
Date Category Description w^� SO a Total Cost
04/24/2009 Legal Notices
PUBLIC NOTICE
North Carolina Environmental
Management Commission/NPDES Unit
2617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environmental Management
Commission proposes to issue a NPDES wastewater
discharge permit to the person(s) listed below.
Written comments regarding the proposed Permit
will be accepted until 30 days after the publish, date
of this notice. The Director of the NC Division of
Water Quality (DWQ) may hold a public hearing
should there be a significant degree of public inter-
est. Please mail comments and/or information re-
quests to DWQ at the above address. Interested
persons may visit the DWQ at 512 N. Salisbury
Street, Raleigh, NC to review information on file.
Additional information on NPDES permits and this
notice may be found on our website: www.ncwater-
quality.org, or by calling [phone].
Alcatel -Lucent USA requested renewal of permit
NCO080853 for Salem Business Park [gw remedia-
tion) in Forsyth County. This facility discharges
remediated groundwater to Salem Creek in the
Yadkin -Pee Dee River Basin. Currently total sus-
pended solids and tetrachloroethene are water
quality limited.
The Davie County Water System requested renewal
of permit NCO024872 for Cooleemee WWTP in Davie
County; this permitted discharge Is treated munici-
pal wastewater to South Yadkin River, Yadkin River
Basin.
The City of Lexington requested renewal of permit
NCO055786 for Lexington Regional WWTP In David-
son County; this permitted discharge is treated mu-
nicipal wastewater to Abbotts Creek, Yadkin River
Basin.
The City of Thomasville requested renewal of per-
mit NCO024112 for Hamby Creek W k WWTP in Davidson
County; this permitted discharge is treated mu-
nicipal wastewater to Hamby Creek, Yadkin River
Basin.
The Town of Denton requested renewal of NPDES
permit NCO082949 for the Denton Water Treatment
Plant in Davidson County; this permitted discharge
is treated filter backwash wastewater to an un-
named tributary to the Yadkin River in the Yadkin -
Pee Dee River Basin.
WSJ: April 24, 2009
PUBLIC NOTICE North Carolina Envi
2 x 61 L 417.83
Media General Operations, Inc.
Publisher of the
Winston-Salem Journal
Forsyth County
Before the undersigned, a Notary Public of Forsyth County, North Carolina, duly
commissioned, qualified, and authorized by law to administer oaths, personally appeared
D.H. Stanfield, who by being duly sworn deposes and says: that he is Controller of the
Winston-Salem Journal, engaged in the publishing of a newspaper known as Winston-Salem
Journal, published, issued and entered as second class mail in the City of Winston-Salem, in
said County and State: that he 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 Winston-Salem Journal on the following dates:
04/24/2009
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
the requirements and qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
Statutes of North Carolina.
This 24th day of April, 2009
(sign��atu�ree(oofperson mak V
davit)
Sworn to and subscribed before me, this 24th day of April,
My Commission expires
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

City of Thomasville
Hamby Creek WWTP
October 31, 2008
NC DENR/ DWQ / NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Attention: NPDES Unit
RE: Permit Renewal for NC 0024112
Dear Mr. Tedder,
The City of Thomasville WWTP respectfully submits one original and 2 copies of the permit
application with supporting documentation. This includes topographic maps, flow diagrams, the
application, DMR's for the one year of data requested, plus DMR's for previous years where PPA was
tested, and finally all toxicity tests for the past 4.5 years. Please note that only 3 two species tests have
been submitted. The fourth had been scheduled for May 2008 however during personnel changeovers
it was missed. It has been rescheduled for the first week of November 2008. Results will be
submitted as soon as they are available.
Please do not hesitate to contact me for any questions regarding this application.
Sincerely,
1
r \
Leigh A. "Misty" Conder
Hamby Creek WWTP Superintendent
cc: Morgan Huffman, Public Services Director
PO Box 368 Phone: [phone]
Thomasville, NC 27361 Fax: [phone]

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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?
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. 3
b. Number of Cl Us. 5
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: Advanced Motorsports Coatings
Mailing Address: 17 High Tech Blvd.
Thomasville NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Anodized aluminum coatings (Type II and Type III) of small parts along with some dyeing of parts
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): Anodized aluminum Darts for the motorsport industry
Raw material(s): Coating of ore -manufactured parts
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.
4.500 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.
500 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. , Categorical pretreatment standards X 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 39 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
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 X 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/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.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 40 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
C. Number of non -categorical SIUs. 3
d. Number of CIUs. 5
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: Brasscraft - Thomasville
Mailing Address: 1024 Randolph St.
Thomasville, NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Plating of plumbing valves and fittings
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): Plumbing valves. fittings
Raw material(s): Brass, copper, nickel, chrome plating
F.6. Flow Rate.
C. 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)
d. 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.
6,500 gpd (X 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 X 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 41 of 44

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Renewal
Yadkin Pee Dee
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.
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 X 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.)
N/A
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):
N/A
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
N/A
4: END OF `PART F. .
REFER TO THEAPPLICATION OVERVIEW (PAGE 1) TO ®ETERMINEW,H,ICH OTHER PARTS,
OF FORM 2A°YOU-MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 42 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal - Yadkin Pee Dee
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.
e. Number of non -categorical SIUs.
f. Number of CIUs.
3
5
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: Custom Drum Services
Mailing Address:
High Point, NC 27264
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Reconditions steel and plastic drums and totes by chemical treating and washing them out.
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): Reconditioned steel and plastic drums and totes
Raw material(s): sodium hydroxide, water, paints, boiler chemicals
F.6. Flow Rate.
e. 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.
5,000 gpd ( continuous or X intermittent)
f. 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.
210 gpd ( continuous or X 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?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 43 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
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 X No (go to F.12)
FA 0. 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.
C. 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):
N/A
d. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
N/A
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 44 of 44

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NC0024112
Renewal Yadkin Pee Dee
777777
SUPPI..EMENTAL APPLiCAT10N�iIIWORMATION �_ : x
PART F INDUS TRIADISGH L USEt ARGES)AND [2CRAfCE> ICLA WASTE$;.;
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.
g. Number of non -categorical SIUs. 3
h. Number of CIUs. 5
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: Finch Industries, Inc..
Mailing Address: PO Box 1847
Thomasville, NC 27361
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Processing chemicals for textiles and for motorsports racing tracks
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): Mirror manufacturing. glass fabrication, and screen printing
Raw material(s): Glass, paint silver, copper, inks
F.6. Flow Rate.
g. 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.
29.000 gpd (X continuous or intermittent)
h. 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.
2,500 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards X Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
433
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 45 of 44

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Renewal
Yadkin Pee Dee
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.
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 X No (go to F.12)
FA 0. 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.)
N/A
FA5. Waste Treatment.
e. 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):
N/A
f. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
N/A
„ a ENDOF "PART F.
REFER"T'O "THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE'
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 46 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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?
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.
I. Number of non -categorical SIUs.
j. 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: Gresco Manufacturing, Inc.
Mailing Address: 216 E. Holly Hill Rd.
Thomasville, NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Preparation of textile or motorsports chemicals based on blending or synthesis of formulations.
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): Textile auxiliary chemicals and motorsports track coatings.
Raw material(s): see attached listing
F.6. Flow Rate.
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.
250 gpd ( continuous or X intermittent)
j. 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.
2,650 gpd ( continuous or X 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?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 47 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
I 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 X No (go to F.12)
FA 0. 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.
g. 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):
N/A
h. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
N/A
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 48 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
k. Number of non -categorical SIUs. 3
I. Number of Cl Us. 5
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: Imaaes of America. Inc.
Mailing Address: 829 Blair St.
Thomasville, NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture of chairs, tables, sofas for healthcare using electroplating and powder coating of steel frames. Some metals fabrication and upholstery
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): Steel frame chairs, tables, etc.
Raw material(s): Steel, nickel, chrome, brass, cyanide, foam for uoholsterv, upholstery fabrics
F.6. Flow Rate.
k. 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.
0 gpd ( continuous or X intermittent) (Note: this industry is shutting down)
I. 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.
100 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards X 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 49 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
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 X 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.
i. 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):
N/A
j. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
N/A
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 50 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
M. Number of non -categorical SIUs. 3
n. Number of CIUs. 5
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: McIntyre Metals, Inc.
Mailing Address: 310 Kendall Mill Rd.
Thomasville, NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture of metal disolav racks
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): Metal disolays from wire, tube and sheet metal
Raw material(s): Steel. Aluminum, powder coatings, cleaning materials
F.6. Flow Rate.
M. 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.
1,500 gpd ( continuous or X intermittent) (Note: this industry hasn't started up yet)
n. 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.
720 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits X Yes ❑ No
b. Categorical pretreatment standards X Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
433
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 51 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
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 X 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
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.)
N/A
F.15. Waste Treatment.
k. 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):
N/A
I. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 52 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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.
o. Number of non -categorical SIUs. 3
p. Number of Cl Us. 5
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: Unilin Flooring
Mailing Address: 550 Clonicer Drive
Thomasville, NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture of laminate flooring. Decor, overlay and backer paper are dipped into a resin mixture, dried and cut. The yapper is pressed onto HDF
board, then milled into planks.
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): Laminate Flooring
Raw material(s): Printed paper rolls. HDF board. formaldehyde based resin, chemical hardeners, melamines. aluminum oxide.
F.6. Flow Rate.
o. 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.
560 gpd ( continuous or X intermittent)
p. 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.
1567 gpd ( continuous or X 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?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 53 of 44

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Renewal Yadkin Pee Dee
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 X 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 X No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
FA 1. 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.) X No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/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.
M. 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):
n. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 54 of 44

Notes on Preparation of 2008 NPDES Permit Renewal Application
A.6. Annual flow data is based on a yearly period from September 1, 2007 — August 31, 2008.
A.12. Where averaged values are reported for multiple samples and some samples are shown as <value,
the, averaged value is based on'/2 the detection limit for that method. This minimizes skewing the data by
not counting <values as zero or as if the value didn't have a < sign in place. Fecal averaging of < values
use 1 instead of the %2 detection limit rule since fecal data is reported in whole numbers and 0.5 would
round to 1. This is also consistent with DMR reporting. Copies of DMR effluent data from the past year
and for the two months in previous years where PPA was performed are included.
B.2.a & d. A topographic map of the surrounding area is included, which shows water bodies and any
wells.
B.2.b & e. A printout from the SCADA system has an overview of the major piping drawn on it and the
digesters labeled as the sludge storage/treatment area.. Note that the drawing is not to scale, but does give
majority of the layout correctly.
B.2.c & f. These are not applicable to the Hamby Creek WWTP.
B.3. Please see the attached process flow diagram and a labeled SCADA overview printout that detail
flows and layout. In general, the process proceeds as follows:
Two primary flows into the plant converge at MH100 (A) (Northside — gravity line, Southside — force
main). The combined flows then enter the headworks (B) where sampling and flow monitoring occur.
There are chemical feeds for pH adjustment (acetic acid or sodium hydroxide) just prior to entrance to the
headworks if needed. After flow measurement, waste proceeds to a Parkson mechanical screen (C) to
remove large debris, plastics and other untreatable materials. Collected solids are washed with reuse
water to remove organics and then compressed with a screw press to remove liquids. Compressed solids
are discharged to a dumpster for disposal at the landfill. Liquids, including those from the washing
process continue on to the grit removal system. In the event of high flow or maintenance to the
mechanical screen a rack screen is in parallel to the mechanical screen to handle any screen bypass flow.
The grit removal system (D) consists of three units — the headcell settling cone and pump, the slurry cup
grit washer, and the grit snail conveyor. The headcell uses centrifical flow around the settling cone
allowing the grit to settle to the bottom of the cone and be pumped out. The headcell also receives flow
from the digester supernatant, the belt press filtrate, and the solids building sump pump. De -gritted
wastewater continues over the weir at the top of the headcell to the head of the oxidation ditch. The grit .
which has been removed from the bottom of the settling cone is pumped to the slurry cup for washing to
remove fine organic materials. The washed grit is then transported by the grit snail conveyor to a
dumpster for disposal at the landfill. In the event any portion of the grit system is not operating correctly,
flow from the mechanical screen can be bypassed around the grit system and on to the oxidation ditch for
treatment.

Wastewater moves from the grit system to (MH101) (E), the entrance to a 5 stage Bardenpho process
oxidation ditch (F) for nutrient removal, BOD and TSS breakdown. MH101 also receives return activated
sludge from the clarifiers and the cannibal interchange tanks (MH103). Wastewater leaves the fourth
stage of the Bardenpho process and goes to the re -aeration tanks (G). This is the fifth stage of the process
although it is not built immediately next to the oxidation ditch. This aeration stage removes additional
Nitrogen. Wastewater then flows to MH103 (H) for splitting to the 2 — 100 ft clarifers. MH103 is.divided
into three sections — oxidation ditch mixed liquor, RAS/WAS, and clarifier effluent. Sludge settles in the
clarifiers (I) and is drawn off the bottom to go back to MH103. Clarifier effluent is returned to MH103 to
be pumped up to MH104 and then into the (J) filter/LJV building for final treatment. The effluent is
filtered by a tertiary disc filter and then disinfected by an in -line UV system. The disinfected effluent is
then discharged to a (K) static aerator for final aeration and discharge to outfall 001. Reuse water is also
pumped from the final effluent back to a pressurized storage tank in the filter/UV building for
dispersement to any systems requiring water for washing (mechanical screen, grit snail, drum screen,
reuse hydrants).
Sludge from the clarifiers is removed to MH103 where it can be pumped to the oxidation ditch as RAS
through MH101, to the digesters (M) via a secondary WAS pump station (L) as WAS, or to the cannibal
system. The RAS pumped up to MH101 can be pumped over to the solids building (0) for screening of
fine inorganics with the drum screen. The screened RAS can then be returned either to the oxidation
ditch or to the Cannibal process interchange tanks (N). The Cannibal solids reduction process uses
computer controlled ORP monitoring to regulate solids additions, withdrawals, and aeration cycles. The
effluent from the process is sent to the flocculation clarifier (R) for phosphorus precipitation. The
effluent returns to MH103 to renter the main process and the solids are wasted through the WAS pump
station.
Chemical feeds are available in various areas of the plant. The chemical building (P) includes metering
pumps, valuing to route chemicals where needed and the storage tanks for Alum, Sodium Hydroxide,
Acetic acid and Ferric Chloride. The sodium hydroxide and acetic acid are used for pH adjustment as
needed and can be fed to the headworks and to the effluent discharge at the static aerator. The alum is
used as a filtration aid in the disc filters and the ferric chloride is used to precipitate out phosphorus in the
floc clarifier and aid in settling in the clarifiers.
Backup power is provided by two 60OKW Genrac diesel generators (Q). Final sludge removal is
accomplished at the belt press building (S). Waste sludge from the digesters (M) is pumped to the belt
press building for either press operation for landfill of solids or loading of the liquid in the event of a land
application.
No bypass lines are present which would allow water/waste to be discharged to the creek. Corrective
action is in process to protect several storm drains from potential run-off around waste dumpsters.
A water balance on the plant is based on an average flow of 2.4 MGD. Minimal detention occurs at the
headworks and grit systems. The oxidation ditch process is broken down to each zone of the ditch as
follows: Anaerobic 5.3 hrs per train, First Anoxic 7.6 hrs per train, Oxidation 35.2 hrs per train, Second
Anoxic 2.6 hrs per train, and Re -aeration 1.3 hrs per train. The Final Clarifiers have a detention time of
19.4 hrs per tank. Detention in the disc filters and UV systems are minimal. An'exact water balance is
not possible due to the reuse water streams used in the plant for washing purposes. The reuse water flow

is not measured and may vary from day to day depending on the amount of washing done. In addition
supernatant from the digesters and filtrate from the belt press are returned to the headworks. These flows
are also not readily measured. Therefore accurately determining that 2.4 MGD came into the plant and
2.4 MGD exited the plant is not possible.
B.6 BOD, Chlorine, Fecal and TSS data are reported in two ways. The first value (maximum, average,
and total samples) includes data for one full year. The second set of numbers (following the slash) is
reporting data only from May 1, 2008 after the new plant has come on line and stabilized.
Part D. Some metals are noted to have maximums or averages below the listed detection limit. The
detection limits listed are based on those of our current contract laboratory supplier. The listed
maximums and averages include data from a previous supplier who had different detection limits. If the
limits are different, and results are listed at below detection limits, then the maximum and average is
based on the use of %2 the detection limit since < signs can't be averaged and using 0 or the detection limit
can bias the data. This practice is commonly used for pretreatment calculations. If both suppliers have
the same detection limit and all values are listed as below detection limit, then the maximum and average
are listed as below detection limit.
Part E. Toxicity testing is listed for all tests from November 2004 forward. A test done by the State
DWQ on June 13, 2005 indicated mortality, however a June 22, 2005 test by the City meet acceptance
criteria. The State's test was not from a fall 24 hour composite sample however. Test #6, August 10,
2005 failed but no apparent cause was determined for this failure and subsequent testing showed no
further toxicity. Tests #17, August 8, 2007 and #18, September 12, 2007 both failed. The City planned to
do TIE testing on effluent in response to the proposed copper and zinc action level, however, no further
toxicity has occurred in which to perform a TIE test. The copper and zinc levels where not out of
compliance limits for the failed tests, however, ammonia limits were. We believe the loss of our
nitrification processes resulted in ammonia levels high enough to be toxic. This problem has been
corrected.

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