NC0024112_Permit Issuance_20050627

Michael F. Easley
Governor
Z William G. Ross, Jr., Secretary
NCDENR North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
June 27, 2005
Mr. Kelly Craver
Assistant City Manager
City of Thomasville
P.O. Boa 368
Thomasville, North Carolina 27361
Subject: Issuance of IVPDES Permit NC0024112 (Major
Modification)
Hamby Creek W WIP
Davidson County
Dear Mr. Craver.
Division personnel have reviewed and approved your application for the Modification 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 May 9,1994 (or as subsequently amended).
This final permit includes no major changes from the draft permit sent to you on April 27, 2005.
If anyparts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
yvu, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit This permit does not affect the legal requirements to obtain
other permits which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be
required. If you have any questions concerning this permit, please contact Sergei Chernikov at telephone number
[phone],extension 594.
Sincerely,
ORIGINAL SIGNED BY
SUSAN A. WILSON
Alan W. Klimek, P.E.
cc: NPDES Unit
Winston-Salem Regional Office / Surface Water Protection Section
Pretreatment Unit
Aquatic Toxicology Unit
Mr. Roosevelt Childress, EPA Region IV
Mr. Keith West, P.E.
Pease Associates, P.O. Boa 18725
Charlotte, NC 28218
N. C. Division of Water Quality / NPDES Unit Phone: [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax: [phone]
Internet: h2o.enr.state.nc.us DENR Customer Service Center..1800623-7748

Permit NC0024112
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 WW `P
BaptistChildren's Home 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, 2005.
Ibis permit and the authorization to discharge shall expire at midnight on April 30, 2009.
Signed this day June 27, 2005. ORIGINAL SIGNED BY
SUSAN A. W►LSON
Alan Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit N00024112
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 comminutor,
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.

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Latitude: 35050'54" Sub -Basin: 03-07-07
Longitude: 80n06'51"
Faculty
Quad #: D18SE
Location
Stream Class: C
Receiving Stream: Hamby Creek
Permitted Flow: 4.0 MGD
North
CityoCvine
rtcO02411oozanz
Hamby Creek Wastewater Treatment Plant

Permit NGDO24112
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.0 MGD)
During the period beginning on August 1, 2005 and lasting until expansion above 4.0 MGD flow or expiration, the Pezmittee is
authorized to discharge treated wastewater from outfa.0 001 subject to the following effluent limitations and monitoring
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS
'MONITORINGREQUTREMENTS
Monthly
Average
Weekly
Average
Dafly
Maximum
Measurement
Frequency
Sample
Type
Sample
Location i
Flow
4.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20-C (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
CmmPnSitC
I, E
Total Suspended Solids 2
30.0 mg/L
45.0 mg/L
Daily
Composite
I, E
NH3-N, mg/L (Apr I - Oct 31)
(Nov I- Mar 31)
2.0 mg/L
3.0 rWL
6.0 mg/L
9.0 mel.
Daily
Composite
E
Fecal Coliform (geomeaic mean)
200/100 ml.
400/100 mL
Daily
Grab
E
Dissolved Oxygen
Daily avenge shall not be less than 6.0 mg/L
Daily
Grab
E
pH
Shall be within the range of
6.0 to 9.0 standard units at all titres
Dad y
Grab
E
Temperature, °C
Daily
Grab
E
Conductivity, umhos/cmr
Daily
Grab
E
Total Residual Odonnd (W/L)
18.0
Daily
J Grab
E
Total Phosphonu 4 (Apr 1- Oct 31)
(Nov 1- Mar 31)
N/A (mg/L)
3,5701b seasonal total
N/A (mg/L)
5,040 lb seasonal total
Weekly
Seasonally
Weekly
Seasonally
Composite
Calculated M
Composite
Calalated 0)
E
E
Total Cadmium (ug/L)
2.1
15.0
Weekly
Composite
E
Total Lead (ug/L)
2/Month
Comp ;ite
E
Total Nickel (ug/L)
94.1
261.0
Weekly
Composite
E
Total Cyanides (ug/L)
2/Month
Grab
E
Total Chromium (ug/L)
533
1022.0
Weekly
Composite
E
Total Copper (ug/L)
2/Month
Composite
E
Total Silver (ug/L)
2/Month
Composite
E
Total Zinc (ug/L)
2/Month
Composite
E
Total Selenium (ug/L)
53
56.0
Weekly
Composite
E
Total Mercury (ng/L)
Monthly
Grab
E
Total NnmVn
Monthly
Composite
E
Chronic Tm cAys
Ceriodaphciia, P/F @ 90% (4)
Quarterly
Composite
E
Pollutant Scan
Annually
Footnote 7
E
Footnotes,
1. Sample locations: I - Influent, E- Effluent.
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 % of the respective influent values.
3. Facility is allowed 18 month from the effective date of the permit to comply with the total residual chlorine limit. This time period
is allowed in order for the facilitytobudget and design/construrt the dechlorination or alternative disinfection systems.
4. Monitoring for total phosphorus shall be conducted and calculated as prescribed above and in Condition A(3.) of this permit
5. The quanfaation level for cyanide (CN) shall be 10 µg/L. IN levels reported as less than 10 pg/L shall be considered zero for compliance
purposes.
6. Ceriodaphnia P/F ® 90%; February, May, August, November, see Condition A(4.) of this permit.
7. See Condition A (6) 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:
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location u
Flow
6.0 MGD I
Continuous
Recording
I or E
BOD, 5-day, 20-C (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
I, E
Total Suspended Solids ]
30.0 mg/L
45.0 mg/L
Daily
Composite
I, E
NH3-N, nel, (Apr I - Oct 31)
(Nov 1- Mar 31)
1.0 mg/L
3.0 mg/L
3.0 mg/L
9.0 mg/L
Day
Composite
E
Fecal Caliform (geometric mean)
200/100 mL
400/100 mL
Daily
Grab
E
Dissolved Oxygen
Daly avenge shall not be less than 6.0 mg/L
Daily
Grab
E
pH
Shall be within the range of
6.0 to 9.o standard units at all times
Daily
Grab
E
Temperature, °C
Daily
Grab
E
Conductivity, um hcs/cnrt
Daily
Grab
E
Total Residual ChImin,3 (uug/L)
18.0
Daily
Grab
E
Total Phosphors 4 (Apr I - Oct 31)
(Nov 1- Mar 31)
N/A (mg/L)
3,570 lb seasonal total
N/A (mg/L)
5,040 lb seasonal total
Weekly
Seasonally
Weekly
Seasonally
Composite
Calculated 0)
Composite
Calculated (3)
E
E
Total Cadtrium (ug/L)
2.1
15.0
Weekly
Composite
E
Total Lead (ug/L)
2/Month
Composite
E
Total Nickel (ng/L)
92.1
261.0
Weekly
Composite
E
Total Cyanides (ug/L)
2/Month
Grab
E
Total Chromium (ug/L)
523
1022.0
Weekly
Composite
E
Total Copper (ug/L)
2/Month
Composite
E
Total Silver (ug/L)
2/Month
Composite
E
Total Zinc (ug/L)
2/Month
Composite
E
Total Selenium (ug/L)
51
56.0
Weekly
Composite
E
Total Mercury (trg/L)
Monthly
Grab
E
Tod Nitrogen
Monthly
Composite
E
Chronic Toxicity&
Ceriodaphnia, P/F @ 96% (1)
Quarterly
Composite
E
Pollutant Scan
Annually
Foomote 7
E
Footnotes
1. Sample locations: I - Influent, E- Effluent.
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 % of the respective influent val r s.
3. Facility is allowed 18 month from the effective date of the permit to comply with the total residual chlorine limit. finis time period
is allowed in order for the facility to budget and design/constmcr the dechlorination or alternative disinfection systems.
4. Monitoring for total phosphors shall be conducted and calculated as prescribed above and in Condition A.(3) of this permit.
5. The quant'vation level for cyanide (a,� shall be 10 µg/L. CN levels reported as less than 10 µg/L shall be considered zero for compliance
purposes.
6. Ceriodaphnia P/F @ 90%; February, May, August, November, see Condition A.(4.) of this permit.
7. See Condition A. (6) of this permit
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NO0024112 '
A. (3.) INSTREAM MONITORING REQUIREMENTS
(a) Beginning on August 1, 2005 and fasting through the permit expiraion date, the Permittee shall perform
instream sampling as specified below, unless exempted per paragraph (b) below.
PARAMETERS
SAMPLE
TYPE
MONITORINGFREQUENCY
SAMPLE
LOCATION (n
June 1- September 30
October 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
(1) U Upstream of outfall 001 at Baptist C hildren's Horne Road D: Downstream at NCSR
2017 and on Abbotts Creek at Center Street below the confluence with Leonard Creek
(b) Coordinated lnstream 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 MOA 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 MOA is terminated for any
reason, the Perminee shall notify the Division in writing within five (5) workrng days, unless the
termination is initiated by the Division.
A. (4.) TOTAL PHOSPHORUS MONITORING
The Permittee shall calculate the seasonal mass loading of total phosphorus ('TP) as the stun of monthly
loadings, according to the following equations:
(a) Monthly Mass Loading (lb/mo) = TP x Q x 8.34
TP = average TP concentration (mg/L) of the composite samples collected during the month
Q = 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 (lb/season) = E (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.

Permit NCO024112
A. (5.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriokrplirca c uNi at an effluent concentration of 96.09/6 (at 6.0 MGD).
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Caiaa Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of February, May, August and November. Effluent
sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a fail= 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/fad results and THu3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR / DWQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Fors 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.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minirmim control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Permit N00024112 '
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 Emit" 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.
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"
Trans-lZ-dichlomethylene
Bit (2-chlomethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethAe-A phthalate
Narate/Nitrite
1,3-dichlompropylene
4-bromphenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalae
Oil and grease
Methyl bromide
2-chloromphthalene
Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
C hrysene
Hardness
1,1,2,2-tetnchloroethane
Di-n-butyl phthalare
Antimony
Tetnchloroethyiene
Di-n-octyl phthalate
Arsenic
Toluene
Drbenzo(a,h)amhncene
Beryllium
1,1,1-ttichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlomberzene
Chromium
Trrhlomethylene
1,4-dirhlorobenzene
GDpper
vinyl chloride
3,3-dirhlorobenzidme
Lead
AalettnrCalkmn'
Diethyl phthalate
Mercury.
P-chlomm-cresol
Dimethyl phthalate
NEW
2-chlomphenol
2,4-dinkrotoluene
Selenium
2,4-dichlompheml
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydnzine
lballiurtt
4,6-dinitmo-cresol
Fluoranthene
zinc
2,4-dinkrophenol
Flumene
Cyanide
2-nitropheml
Hexachloroberrzene
Total phenolic compounds
4-nitrophenol
Finxachlombutadvne
Vd�kmmvc
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylomtr&
2,4,6-trichlomphenol
Indeno(1,2}cd)pyrene
Benzene
Rnennrtml ns>m"dr
Isophomne
Bromoform
Acenaphthene
Naphthalene
Cubon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthrxene
N-nkro odi-o-pmpylarnrne
Chlorodibrom ornethane
Benzidime
ISnitrosodimethyhnnir e
Chlomethane
Benzo(a)anthruene
N-nitrosodiphenyhumne
2-chlomedtylvmyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyre-
Dichlombromomethme
Benzo(Aperylene
1.2,4-trichlombenzene
1,1-dicb1omethan"
Benzo(k)fhmranthene
1,2-dichlomethane
Bit (2-chlomethoxy) methane
Test results shall be reported to the Division in DWQ Form A MR PPAI or in a form approved by the Director within 90 days
of sampling. The report shall be submitted to the following address: NC DENR / DWQ / Central Files,1617 Mail Service
Center, Raleigh, North Carolina 27699-1617.

1000 srb��
A UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
'02 ° ATLANTA FEDERAL CENTER
e 61 FORSYTH STREET
��41 veot0r'4 ATLANTA, GEORGIA 30303-6960
MAY 0 9 2005
Sergei Chemikov, Ph.D
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
Hamby Creek WWTP
Permit No. NCO024112
Dear Dr. Chemikov:
R@120 V IN
MAY 1 1 2005
In accordance with the EPA/NCDENR MOA, 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 if
significant comments objecting to the permit are received. Otherwise, please send us one copy of
the final permit when issued.
Sincerely,
w� �4y 0rX
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
Internet Address (URL) • http://www.spa.gov
RecycledfRocyclabie . Printed with Vegetable 00 Based Inks on Recycled Paper (Minimum 3WI. Postconsumer)

interest.
PUBLIC
fotherd per-
NOTICE
upporaft
mo[ and rt-
ing information on file
used to determine con -
STATE OF NORTH
ditions present in the
CAROLINA
draft permit are availa-
ENVIRONMENTAL
ble upon request and
MANAGEMENT
payment of the costs of
COMMISSION/NPOES
reproduction. Mail com-
UNIT
ments and/or requests
1617 MAIL
for information to the
SERVICE CENTER
NC Division of Water
RALEIGH, NC
Quality at the above
27699.1617
address or call the Point
Source Branch at (919)
NOTIFICATION
733-5083, extension
OF INTENT
520. Please include the
NPDES permit number
TO ISSUE A
(munication. m interest d
NPDES
persons may also visit
WASTEWATER
the Division of Water
PERMIT
Qualit' at 5e2 N..nau�
On the basis of thor.
the hours of 8:00 a.m.
ough staff review and
and 5:00 p.m. to review
application of NC Gen-
Information on file.
eral Statute 143.21,
Public Law 92-500 and
The City of Thomasville
other lawful standards
(P.O. Box 368. Thomas -
and regulations, the
ville, NC 27361) has ap-
North Carotin Envimn-
plied for a modification
mental Management
to its NPDES wastewa-
Commission proposes
to issue a National PoI-
ter penTlit. The City
wishes to expand the
lutant Discharge Elimi-
nation System (NPDES)
wastewater permit to
6.0 MGD. with a contin-
wastewater cischarrgge
ued discharge of treat-
0 the persons)
ed municipal was[ewa-
Pstetl below effective
ter into the Hamby
45 days from the pub-
Creek, a Class C water
fish date of this notice.
in the Yadkin -Pee Dee
River Basin. Currently
Written comments ne-ed
the proposed
BOD, ammonia nitm-
en, cadmium, nickel,
permit will he accepted
permit
chromium, selenium,
until 30 days after the
and total residual chlor-
publish date of this no,
ine are water quality
lice. All Comments re-
limited. This discharge
ceived prior, to that
may affect future allo-
date are Considered in
cations in this portion
the final determinations
regarding the pmposed
of the Yadkin -Pee Dee
River Basin.
the NC Division of Wa- April 30, 2005
ter Quality may decide
to hold a public meet
-
Iing far the Pmposedf OF PUBLICATION q
STATE OF NORTH CAI Storm received the
sign fi- Lexinglon,N.C. 2005
DAVIDSON C�OQU�NTY II cant degree 0f public
/�LUI� Ujr(J of THE DISPATCH, a newspaper published in the city of
Lexington, County and State aforesaid, being duly sworn, says the foregoing legal of
which the attached is a true copy, was published in said newspaper once the1�
b
�lt,.t . n

FACI' SHEET - NPDES PERMIT
Page 1
Fact Sheet- NPDES Permit
City of Thomasville
NPDES No. NCO024112
Facili
Receiving Stream
Facility Name:
Hamby CreekWWTP
Receiving
Stream:
Hamby Creek
Permitted Flow
Subbasin:
(MGD):
6.0
030707
Facility Class:
IV
Index No.:
Facility Status:
Existing
Stream Class:
C
Permit Status:
Major Modification.
Expansion to 6.0 MGD
303(d)Listed:
Yes
County-
Davidson
Use Support:
Not Supporting
Regional Office:
Winston-Salem
Drainage Area
(mi)
13.3
USGS Topo
Summer 7Q10
Quad:
D18SE
(cfs)
0.43
Winter 7Q10
(cfs):
1.3
30Q2 (cfs):
1.7
Average Flow
(cfs):
12.0
IWC (%):
96
SUMMARY:
The City of Thomasville owns and operates a 4.0 MGD activated sludge wastewater treatment plant.
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 9 Significant Industrial Users.
The Thomasville W WT P 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. Fecal Coliform limits at the water quality standard have been placed in the permit
(consistent with all NPDES permits).
The proposed expansion reflects population/flow projections to the year 2020. Project also
includes major improvements, including biological nutrient removal, which is needed to meet new
TP limit. Final speculative limits were submitted to the town via letter dated April 8, 2004 through
Construction Grants and Loans. Mr. West of Pease and Associates have selected one of the options
for oxygen consuming waste from the speculative limits letter and has informed Sergei C hemikov in
the telephone conversation (May 5, 2005) of the choice.

FACT SHEET -NPDESPERMIT
Page 2
City of Thomasville completed an Environmental Assessment (EA) on June 10, 2004 and received a
Finding of No Significant Impact on December 14, 2004. The 201 Facilities Plan was approved on
February 7, 2005. A complete application for expansion has been submitted on February 11, 2005.
The EA contained an Engineering Report outlining alternatives to discharge. Discharge to the
surface water was found to be the most feasible option for the additional 2.0 MGD of wastewater
flow. DWQ has determined that the proposed expansion is necessary to accommodate important
economic or social development in the area in which the waters are located. This fact sheet and
permit reflect the modification for the increased flow to 6.0 MGD.
REASONABLE POTENTIAL ANALYSIS
The following parameters are monitored through the permit: Cd, Pb, Nr, CN, Cr, Cu, Ag, Zn, Ft.
The following parameters are monitored quarterly through the pretreatment program: As, Cd, Cr,
Cu, Pb, Hg, Mo, Ni, Se, Zn, CN, Ag, Sb. The permit will continue to require the City to implement
its pretreatment program
Reasonable potential analysis was conducted for. Ag, As, Cd, CN, Cu, Cr, Hg, Ni, Pb, Se, and Zn.
(see attached).
TOXICITY TESTING:
Type of ToxicityTest: Chronic P/F
Existing Limit: 001: Chronic P/F @ 90%
Recommended Limit: 001: Chronic P/F @ 96%
Monitoring Schedule: February, May, August, November
COMPLIANCE SUMMARY:
Facility has a negative compliance record. Expansion and improvement of the plant 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.
PROPOSED CHANGES:
• MaratorirugFmuaraa: Monitoring frequencies for Pb and CN have been reduced to
2/Month due to the removal of the limits.
• Linau: Based on the Reasonable Potential Analysis, limits for Pb and CN have been
removed. Other limits for an expanded phase have been reduced due to the increase in IWG
PROPOSED SCHEDULE
Draft Permit to Public Notice: April 27, 2005 (est.)
Permit Scheduled to Issue: June 6, 2005 (est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact
Sergei Chemikov at [phone] ext. 594.

Ai,q- /C/,,JQ NC
Page 3
REGIONAL OFFICE COMMENT:
NAME: l/�— DATE: 71,zgk r
EPA COMMENT:
NAME: DATE:

Facility Nam =
Thomasville
NPDES k =
NCO024112-001
Qw (MCD) =
6
7Q]Os (cfs)=
0.43
!WC('-)=
95.58
FINAL RESULTS
Cyanide
Max. Pred Cw 13.7
Allowable Cw 5.2
d Dev. 1.1180
can 5.3
V. 0.2130
of data points 20
Factor =
1.37
Value
10.0 µg/l
Pred Cw
13.7 µg/1
vable Cw
5.2 µg/1
v-%
Date
n <
I <
2 <
3 <
4 <
5 <
6 <
7 <
8 <
9 <
10 <
It <
12 <
13 <
14 <
15 <
16 <
17 <
18
19 <
20 <
Parameter = C de
Standard
a1 Data BDL=1/2DL
1
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
10.0
5.0
5.0
1
1
1
1
1
1
1
10
10
10
10
10
10
10
10
10
10
10
10

Facility Name=
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QIOs (c6s)=
0.43
lWC ("/) =
95.58
FINAL RESULTS
Cyanide
Max. Pred Cw 13.7
Allowable Cw 5.2
RESULTS
Std Dev.
1.1180
Mean
5.3
C.V.
0.2130
Number
of data points
20
Mull Factor =
1.37
Max. Value
10.0 µg/l
Max. Pred Cw
13.7 µg/l
Allowable Cw
5.2 µg/I
�UN
Date
n <
1 <
2 <
3 <
4 <
5 <
6 <
7 <
8 <
9 <
10 <
11 <
12 <
13 <
14 <
15 <
16 <
17 <
18
19 <
20 <
Parameter = Cyanide
Standard = 5.0 µg/1
Actual Data BDL=1/2DL
101
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
10.0
5.0
5.0
1
1
10
10
1
1
1
10
10
10
10
10
10
10
10
10
10
10
10
,I) ��Oj )

Facility Name =
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QI0s (c6s)=
0.43
IWC (%) =
95.58
FINAL RESULTS
Silver
Max. Pred Cw 49.51
Allowable Cw 0.06
RESULTS
itd Dev. 2.2520
vlean 1.6
_V. 1.4455
of data points ="
Factor =
4.95
Value
10.00 µg/I
Pred Cw
49.51 µg/l
vable Cw
0.06 µgtl
Ac+oA.., 1wd
A/
Parameter = Silver
Standard = 0.06 µg/l
Date n < Actual Data BDL=1/2DL
I
2
3
-1
0
7
8
9
10
11
12
13
14
15
16
17
18
191
201
1
1.00
0.50
0.50
1.25
1.40
2.50
1.20
2.50
2.50
2.50
2.50
10.00
0.25
0.25
0.50
0.25
0.25
0.23
0.25
0.25
<
1
<
1
1.25
1.1
2.5
1.21
<
5
<
51
<
51
<
51
1
<
0.5
<
0.5
<
1
<
0.5
<
0.5
<
0.5
<
0.51
<
1 0.5
("I-C,w)-C-

Facility Name =
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7Q10s (cfs)=
0.43
IWC(%)=
95.58
FINAL RESULTS
Arsenic
Max. Pred Cw 10.04
Allowable Cw 2.3
Dev. 0.8104
in 1.7
0.4732
of data points 20
Factor =
1.97
Value
5.1 µg/I
Pred Cw
10.04 µg/I
vable Cw
52.3 µg/I
Parameter = Arsenc
Standard = 50.0 µg/1
Date n
<
Actual Data
BDL=1/2DL
I
<
3.0
1.5
2
<
3.0
1.5
3
<
4.3
2.2
4
<
3.0
1.5
5
<
3.0
1.5
6
<
3.0
1.5
7
5.1
5.1
8
<
3.0
1.5
9
<
3.0
1.5
10
<
3.0
L5
I
<
3.0
1.5
12
<
3.0
1.5
13
<
3.0
1.5
14
<
3.0
1.5
15
<
3.0
1.5
16
<
3.0
1.5
17
<
3.0
1.5
18
<
3.0
1.5
19
<
3.0
1.5
20
<
3.0
1.5
wl� � A V G G Il Uli/ � R Cw
2- Al CIL
VJ

Facility Name=
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QIOs (cfs)=
0.43
lWC (%) =
95.58
FINAL RESULTS
Cadmium
Max. Pred Cw J21
Allowable Cw
RESULTS
Std Dev.
0.3482
Mean
0.3
C.V.
1.0240
Number
of data points
20
Mull Factor =
3.58
Max. Value
1.8 µg/t
Max. Pred Cw
6.4 µg/I
Allowable Cw
2.1 µg/I
Parameter = Cadmium
Standard = 2.0 1 µg/l
Date n
<
Actual Data
BDL=1/2DL
I
<
0.5
0.25
2
<
0.5
0.25
3
0.5
0.50
4
<
0.5
0.25
5
<
0.5
0.25
6
<
0.5
0.25
7
<
0.5
0.25
8
<
0.5
0.25
9
<
0.5
0.25
10
<
0.5
0.25
11
<
0.5
0.25
12
<
0.5
0.23
13
<
0.5
0.25
14
<
0.5
0.25
15
1.8
1.80
16
<
0.5
0.25
17
<
0.5
0.25
18
<
0.5
0.25
19
<
0.5
0.25
20
<
0.5
0.25
� t,

Facility Name = Thomasville Parameter = Co
NPDES # = NCO024112-001 Standard = 7.0 µg/I
Qw (MGD) = 6
7QIOs (*)= 0.43 Date n < Actual Data BDL=1/2DL
IWC (%) = 95.58 1 < EA2
5.0
21.0
FINAL. RESULTS - 17.0
Copper 23.0
Max. Pred Cw 74.5 5 24.0
Allowable Cw 7.3 6 33.0
7 39 39.0
8 34 34.0
RESULTS 9 23 23.0
Std Dev. 9.7304 10 31 31.0
Mean 27.0 11 27 27.0
C.V. 0.3611 12 14 14.0
13 1 14.0
Number 14 25.0
of data points 20 15 2 29.0
16 2 28.0
Mull Factor = 1.691 17 3 35.0
Max. Value 44.0 µg/I 18 3 34.0
Max. Pred Cw 74.5 µg11 19 3 39.0
Allowable Cw 7.3 µg/1 20 44.0
N,3 � I ,,'+ , C,�CAi vti `-wd

0
Facility Name=
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QIOs (cfs)=
0.43
IWC (%) =
95.58
FINAL RESULTS
Chromium
Max. Prod Cw 70.5
Allowable Cw 52.3
Dev. 7.4631
in 13.3
0.5630
points 20
Factor =
2.20
Value
32.0
Pred Cw
70.5
vable Cw
52.3
Parameter = I Chromium
Standard = F50.0 µ A
Date n < Actual Data BDL=1/2DL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
2(
<
2
10.0
10.0
10.0
10.0
15.0
25.0
25.0
13.0
15.0
10.0
5.5
2.5
8.4
9.7
5.0
12.0
15.0
22.0
32.0
10.0
<
2
<
201
<
2
15
251
251
13
151
101
5.51
<
51
8.41
9.71
<
1
1
15
2
3
1
{J�z)1 I L
sz,3/�Jb

Facility Name =
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
4
7QIOs (cfs)=
0.43
(WC (%) =
95.58
FINAL RESULTS
Mercury
Max. Pred Cw 0.00202
Allowable Cw 0.01255
d Dev. 0.00000
can 0.00202
V. 0.00000
of data points 23.00000
ult Factor =
1.000001
Max. Value
0.00202
Max. Pred Cw
0.00202
Allowable Cw
0.01255
20 values below detect
Parameter = M
Standard = 0.012 µg/l
Date n
<
Actual Data
BDL=1/2DL
1
<
0.00404
0.00202
2
<
0.00404
0.00202
3
<
0.00404
0.00202
4
<
0.00404
0.00202
5
<
0.00404
0.00202
6
<
0.00404
0.00202
7
<
0.00404
0.00202
8
<
0.00404
0.00202
9
<
0.00404
0.00202
10
<
0.00404
0.00202
11
<
0.00404
0.00202
12
<
0.00404
0.00202
13
<
0.00404
0.00202
14
<
0.00404
0.00202
15
<
0.00404
0.00202
16
<
0.00404
0.00202
17
<
0.00404
0.00202
18
<
0.00404
0.00202
19
<
0.00404
0.00202
20
<
0.00404
0.00202
21
<
0.00404
0.00202
22
<
0.00404
0.00202
23
<
0.00404
0.00202
n/0 )Cr--A) till
et l�� ),J' -1.Op I

Facility Nam =
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7Q10s (cfs)=
0.43
1WC (%) =
95.58
FINAL RESULTS
Nickel
Max. Pred Cw 140
Allowable Cw 92.1
RESULTS
Sid Dev.
14.0825
Mean
27.0
C.V.
0.5216
Number
of data points
20
Mull Factor =
2.09
Max. Value
67.000 µgfl
Max. Pred Cw
140.251 µgjl
Allowable Cw
92.1 µgo
Parameter = Nickel
Standard = 88.0 µgn
Date n < Actual Data BDL=1/2DL
I <
2
10.000
2 <
2
10.000
3
15
15.000
4
1
16.000
5
1
16.000
6
27
27.000
7
5
50.000
8
201
20.000
9
241
24.000
10
431
43.000
11
251
25.000
12
211
21.000
13
181
18.000
14
241
24.000
15
3
32.000
16
27
27.000
17
3
36.000
18
37
37.000
19
67
67.000
20
2
22.000
�C

Facility Name -
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QIOs (cjs)=
0.43
1WC(-/o)=
95.58
FINAL RESULTS
Lead
Max. Pred Cw 4.6
Allowable Cw 26.15
RESULTS
Std Dev.
0.5334
Mean
1.3
C.V.
0.4151
Number
of data points
20
Mult Factor =
1.82
Max. Value
2.5
µg/l
Max. Pred Cw
4.6
µg/I
Allowable Cw
26.2
µg/I
4 CIA�
Parameter = Lead
Standard = 25.0 µg/I
Date n < Actual Data BDL=1/2DL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
<
2
1.0
1.0
1.7
2.4
1.8
2.3
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
2.5
1.0
<
2
1.7
2.4
17
2.3
<
2
<
2
<
2
<
2
<
2
<
2
<
2
<
2
<
2
<
2
<
2
<
2
2.5
<
2
rj j L,

Facility Name=
Thomasville
NPDES N =
NCO024112-001
Qw (MGD) =
6
7QIOs (*)=
0.43
IWC (%) =
95.58
FINAL RESULTS
Selenium
Max. Pred Cw 15.8
Allowable Cw 5.2
d Dev. 1.197S
can 1.9
V. 0.6438
of data points 20
Factor =
2.43
Value
6.5 µg/I
Prod Cw
15.8 µg/I
vable Cw
5.2 µg/I
Parameter = Selenium
Standard = 1 5.0 µg/1
Date n < Actual Data BDL=1/2DL
2
3
4
5
6
1J:3
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1.5
1.5
1.5
1.5
1.5
1.5
6.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
3.7
1.5
1.5
1.5
1.5
6.5
<
3
<
3
<
3
<
3
<
3
<
31
<
3
<
3
3.7
<
3
<
3
<
3
<

Facility Name=
Thomasville
NPDES # =
NCO024112-001
Qw (MGD) =
6
7QIOs (*)=
0.43
FINAL RESULTS
Zinc
Max. Pred Cw
108.9
Allowable Cw
52.3
Allowable #/day
0.0
Rd Dev. 10.6715
Kean 53.8
:.V. 0.1985
points 20
Factor =
1.34
Value
81.0 µM
Pred Cw
108.9 µo
vable Cw
52.3 µgfl
Datc
Parameter = Zinc
Standard 1 50.0 Iggll
n < Actual Data BDL=1/2DL
1
541
54.0
2
41
41.0
3
511
51.0
4
521
52.0
5
6
66.0
6
58
58.0
7
401
40.0
8
41
41.0
9
421
42.0
10
48
48.0
11
811
81.0
12
57
57.0
13
43
43.0
14
5
50.0
15
6
67.0
16
561
56.0
17
60.0
18
5
50.0
19
67
67.0
20
51 51.0
_ "t I,,
i ?.✓-E/1

��iPease
Architects - Engineers
February 11,2005
NCDENR — DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Reference: Hamby Creek WWTP Upgrade and Expansion
Thomasville, North Carolina
Pease Commission No. 2002032.02
Subject: Permit Modification Application
NPDES Permit No. NCO024112
Gentleman:
/ f,or Red j fi2pgS�
Pease Associates
Post Office Box 18725
M5 East Indenendence Blvd.
Chadotte, NC 28218
Phone [phone]
Fax [phone]
Attached is the subject Application for the referenced project for your review. A FNSI has been
issued for the referenced project. Plans and specifications and SRF Loan Application have been
submitted to the Construction Grants and Loans Section. Approval of the Modification of the permit
is required prior to issuance of an Authorization to Construct (ATC) for the project.
Your assistance with reviewing the Application as quickly as possible would be greatly appreciated.
A check for the processing fee payable to NCDENR in the amount of $860.00 is enclosed.
I
D L5 5 11
U I
n F E B 2 1 2005 �I
--- — J
0y
Over 60 years of architectural and engineering design excellence

NCDENR - DWQ
Page 2
February 11, 2005
If you have any questions, please call.
i
Sincerely,
c A. Keith West, P.E.
Executive Vice President
Chief Operating Officer
AKW/mbb
Enclosure
cc: Mr. Kelly Craver, City of Thomasville
Mr. Morgan Huffman, City of Thomasville
Mr. Dan Blaisdell, NCDENR-DWQ
Mr. Cecil Madden, NCDENR-DWQ
N: \ 2002032-00 \ Uile \ Ph5\ Review -Approve\ 2002032025011NCDENR-DWQ021105akw.doc
Pease Associates Architects - Engineers

Hamby Creek WWTP NPDES Permit No. 0024112 Modification B.3
-------------
-
- -------- ------- ----------xam
i�
p
e�
ne
OVaOM
souoe
it e
I
__caaR___
_
c 333 � 3
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ii
6
ame ve a,
III—�
�I
0
Pease
A hdems- Engkreeis
FINAL DRAWINGS
FOR REVIEW
PURPOSESONLY
City of Thomasville
North Carolina
Hamby Creek
Wastewater
Treatment Plant
Upgrade and
Expansion
Flow
Diagram
C7.02

C
I
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Pease
Nchilect• - En01noers
FINALDRAWINGS
FOR REVIEW
PURPOSESONLY
City of Thomasville
North Carolina
Hamby Creak
Wastewater
Treatment Plant
Upgrade and
Expansion
�r
New
Hydraulic
Profile
C1.03

Permit Modification
Existing Processes
The Hamby Creek Wastewater Treatment Plant receives sewage from the
City of Thomasville via sanitary sewer and provides treatment before it is
discharged to Hamby Creek. Preliminary treatment at the plant consists
of manual barscreen, comminutor, grit collector, grit pump, and grit
washer. The comminutor grinds of sheds the large materials entering the
plant. The manual barscreen provides a bypass of the comminutor for
servicing ant high flows. The grit collector, pump, and washer remove
sand, cinders, and gravel from the influent flow that could cause abrasion
of units in the plant.
Primary treatment consists of the primary clarifiers, which remove the
settleable solids from the influent and trickling filters using rock media.
This helps to lower the BOD loading on the plant's secondary treatment
processes.
Secondary treatment consists of 6 activated sludge basins utilizing
blowers for oxygenation and three final clarifier units. Effluent from the
clarifiers is pumped to a polishing pond with three floating aerators.
Disinfection of effluent from the polishing pond is done by chlorine gas
injection and flash mixing, effluent then falls over two short waterfalls
and is discharged via a pipeline to the confluence of Hamby and North
Hamby Creeks.
Activated sludge from the bottom of the secondary clarifiers is pumped
back and the flow is split between the primary clarifiers and return
sludge mixed with influent to the aeration basin. Sludge is wasted from
the primary clarifiers by pumping it to the anaerobic digesters.
Processes for Permit Modification
Primary Treatment
Influent Flow Measurement/Screening
The first, of two, preliminary treatment structures will include influent
flow measurement (Parshall flume), temperature and pH monitoring,
Hamby Creek W WTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Pease Associates Architects -Engineers Page 1 of 13
B.3

influent sampling, and screening/compaction of influent solids. The
primary component in this structure is the installation of an influent filter
screen.
Screen Opening: 3 mm
Inclination angle: 750
Screen Width: 4'-0"
Performance: BOD Removal > 60%
Total Coliform Organism Removal > 90%
Screenings Volume Reduction > 75%
Head loss (clean) at peak flow of 15 MGD: 13 inches water
Grit Removal
Grit removal is an important preliminary treatment process to protect
rotating equipment and prevent settling of heavy grit solids throughout
the WWTP. To accomplish this, a low -head vortex grit removal system is
proposed.
Tray diameter: 9'-01,
Performance: 95% removal of >100 micron material
Headloss at Design Flow of 6 MGD: 6 inches
The two existing primary clarifiers are no longer needed with the
proposed BNR system that is included in the design. The two primary
clarifiers shall be stripped of existing equipment, but the concrete
clarifiers shall remain and be used as emergency sludge storage tanks.
The existing roughing filters are no longer needed as part of the treatment
train; therefore, piping modifications will be made to bypass the two
existing roughing filters and the associated recycle pump station.
Nutrient Removal
The need for Phosphorus and Nitrogen removal is the major process
change, and this will be achieved with the use of a Biological Nutrient
Removal (BNR) process, which involves major changes to the secondary
aeration basins, provisions for chemical trimming, and tertiary filtration.
BNR will be utilized for the removal of BOD, COD, TSS, Nitrogen, and
Phosphorus. The BNR process will be designed for nitrification and
denitrification and phosphorus removal, utilizing anaerobic; axoxic and
Hamby Creek W WTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 2 of 13
Pease Associates Architects - Engineers B.3

oxic zones; internal recirculations of the MLSS; and external return of the
activated sludge.
Preliminary designs for the BNR system include the U.S. Filter/Kruger
Products AVO process and the GL&V/Dory Oliver EIMCO Carrousel
AVC process.
The BNR process design is based upon a 6.0-MGD initial flow condition
and 215 mg/L influent BOD concentration. Each design attempted to
incorporate the existing 6 aeration basins. Significant modifications were
required to utilize the existing basins, and based on the Value
Engineering Study, new construction was deemed more cost effective
than renovating the existing aeration basins. The EIMCO system utilizes
three oxidation -ditch, loop reactors including 125 Hp vertical aerators
with center island drives for aeration.
Process SRT: 15 days
Aeration AOR: 19,150 lbs O,/day
Aeration SOR: 29,475 lbs O,/day
Power Required: 351 Hp
Hydraulic Detention Times:
Anaerobic:
0.8 hours
First Anoxic:
1.1 hours
Oxic:
4.3 hours
Second Anoxic:
0.6 hours
Reaeration:
0.5 hours
Chemical treatment with alum and caustic is incorporated to trim
phosphorus to meet effluent limits on a periodic basis. Final polishing of
nutrients and solids removal is achieved with the use of tertiary filters.
Secondary Treatment
A two new 100-foot-diameter final clarifiers are proposed to provide the
required clarification requirements for BNR at the expanded flowrate of 6
MGD. The other two existing 55-foot-diameter final clarifiers will be
taken out of service as clarifiers.
Number of Clarifiers: 2
Diameter: 100'-0"
Sidewater Depth: 14'-0"
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Pease Associates Architects - Engineers Page 3 of 13
B.3

Overflow Rate: 382 gpd/sf
Tertiary Treatment
Effluent Filtration
The biologically treated and clarified effluent is discharged from the final
clarifiers to effluent filters for final polishing. The objective of the
filtration process will be to remove additional nutrients and suspended
solids so that the effluent will consistently meet the NPDES effluent limits
including a total phosphorus.
The proposed filters are the rotating, automatic-backwashing, synthetic
media discfilters units. Three filter units are provided for the 6.0 MGD
design. The Discfilters are a simple design requiring minimal headloss
(typically 8 —10 inches). The filter backwashing cycle uses an automated,
rotating spray header system to remove filtered solids from the media.
Water for backwashing will be the filtered effluent. Filter controls will be
capable of operating either in fully automatic, semi -automatic, or manual.
UV Disinfection
New effluent limits require that chlorinated wastewater be dechlorinated
prior to discharge. This would necessitate the construction of a new
chlorine contact chamber with an approximate 30-minute detention time,
followed by dechlorination with a sulfur dioxide system.
An alternative disinfection process to chlorination was also evaluated.
This process is ultraviolet (UV) disinfection. UV disinfection was not
originally included in the conceptual design due to the inherent color of
the wastewater due to textile industry discharges to the WWTP; however,
newer UV technology warranted another evaluation of LTV as a
disinfection option for the Hamby Creek effluent.
Technological and economic comparisons were made between UV and
chlorination/dechlorination systems and between the different UV
technologies.
First, UV was determined to be a viable disinfection option for the City
after some recent sampling and testing on the WWTP secondary clarifier
effluent. Although color is still prevalent in the wastewater (color has
dropped due to the reduction in dying operations is the drainage basin),
the transmissivity of the water is fairly typical for wastewaters in this area
and allows UV to be an economically viable option.
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 4 of 13
Pease Assoclates Architects - Engineers I33

Comparing UV and Chlorination/Dechlorination technologies, several
factors favored the selection of UV including the following:
• UV would eliminate chemical storage and handling
requirements
• UV would eliminate many disinfection byproducts
produced by chlorine addition
• Selected (in -line) UV system required smaller footprint
that chlorination/dechlorination system
• Selected in -line UV system could easily be located within
the effluent filter building
• Ease of maintenance and operator attention for UV over
chlorination / dechlorination
As far as a comparison between UV technologies, traditional in -channel
UV systems and the more recent in -line configurations were evaluated.
Advantages of the in -line UV system over the conventional in -channel
designs include the following:
• Footprint requirements for the in -line systems are a
fraction of the footprint required for the in -channel designs
• In -line systems allowed the UV system to be conveniently
located inside the filter building
• In -line systems provide ensure consistent UV provided to
each gallon treated, whereas the in -channel systems have
more room for short circuiting
• Less maintenance required on in -line systems
Estimated construction costs of the two systems were essentially the
same. The in -line UV equipment was more expensive than the in -channel
but was offset by the savings in lower cost of concrete structures, etc.
Based on the information provided above, the in -line UV system was
selected. Basic design information is provided below.
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 5 of 13
Pease Associates Architects -Engineers B 3

Number of Units: 2
UV Configuration: Closed vessel, in -line
UV Type: Medium pressure, high intensity
Vessel Dimensions: 28" diameter
Number of Lamps: 16 per vessel
Power Requirements: 4.5 kW per lamp
Post Aeration
The post aeration system will consist of a diffused aeration basin using
positive displacement blowers and fine bubble diffusers for aeration. The
objective of this unit process is to ensure the effluent dissolved oxygen
(DO) concentration meets the minimum NPDES permit limit of 6.0 mg/L.
Effluent Reuse
As part of the Hamby Creek WWTP upgrade and expansion, treated
effluent from the plant is proposed to be pumped to the City of
Thomasville's Winding Creek Golf Course. The golf course is located
approximately 3 miles north of the treatment plant and is bordered on the
south by Business Highway 85, on the north by Hunts Fork Creek, on the
west by Jacob Street, and on the east by Highway 109.
A pump station, located at the treatment plant, will pump treated effluent
through an 8-inch diameter force main to a proposed storage tank at the
golf course. A second pump station will pump water from the storage
tank into the golf course's existing irrigation system.
The location of the Hamby Creek WWTP, Winding Creek Golf Course,
proposed force main alignment, and additional associated improvements
are indicated in Figure 4.
Water Demand Requirements at Winding Creek Golf Course:
The golf course currently requires a maximum of approximately 370,000
gallons per day (gpd) to irrigate the entire golf course. Irrigation
typically occurs on a 12-hour cycle in the evening. 370,000 gallons over a
12-hour period equals a maximum flow rate of approximately 515 gallons
per minute (gpm). This maximum flow rate typically occurs three times a
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 6 of 13
Pease Associates Architects -Engineers B 3

week during summer months. The average flow rate during summer
months is approximately 340 gpm over a 12-hour period.
During summer months it is estimated that the golf course will ultimately
require a maximum of approximately 864,000 gpd, or approximately
1,200 gpm, over a 12-hour period to irrigate the entire course. The
average summer -time flow rate is projected to be approximately 600 gpm.
Average Demand
Requirements
Maximum Demand
quirements
Daily
Demand
(mgd)
24-hour
Flowrate
(gpm)
12-hour
Flowrate
(gpm)
ly
tDemand
d)(gpm)
24-hour
Fowrate
12-hour
Flowrate
(gpm)
Existin (2003)
0.245
170
340
70
257
515
Pro osed
0.432
300
600
0.864
600
1,200
Description of Proposed Improvements:
Presented next is a description of proposed improvements needed for the
wastewater treatment plant, golf course, and distribution system.
Treatment Plant Improvements
With completion of proposed treatment plant improvements, treated
effluent will enter an effluent metering vault after all treatment processes
for discharge to Hamby Creek. The effluent metering vault will be
located adjacent to and downstream of the effluent filters and ultraviolet
(UV) disinfection. The effluent metering vault consists of two wet wells
separated by a weir. Treated effluent enters the first wet well, flows over
the weir into the second chamber, and continues on to a static aerator
prior to discharge to Hamby Creek.
Two vertical turbine pumps, proposed to be installed in the first wet well
chamber of the effluent metering vault, will pump water back to the
effluent filter and UV building through a separate high pressure reuse
line. Within the filter/UV building, the effluent will pass through a
second UV unit installed on the reuse discharge line and then continue on
to the golf course. A second pass through the UV unit is needed to meet
fecal coliform limits for reuse. Figure 3 includes the proposed reuse
upgrades.
Hamby Creek W WTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 7 of 13
Pease Associates Architects - Engineers B.3

It is recommended that two 75-hp vertical turbine pumps be used for this
application. Each pump will have a capacity of approximately 700 gpm
at a total dynamic head (TDH) of 225 feet. One pump will alternate as the
duty pump and the other will remain as a back-up.
Force Main Alignment
An 8-inch diameter force main is proposed to be installed between the
WWTP and the Golf Course to transmit reuse water. Piping is proposed
to be installed within existing City of Thomasville and North Carolina
Department of Transportation (NCDOT) rights -of -way and existing City
easements. It is anticipated that no right-of-way acquisition will be
required as part of this project. The proposed alignment for the force
main is indicated on Figure 4 and generally follows Baptist Children's
Home Road, King Street, Piney Wood Street, and Jacob Street. The total
length is approximately 18,000 feet and includes a railroad crossing and
State Highway crossing. Both crossings will be cased and are proposed to
be constructed by the bore and jack method. The highway crossing will
be adjacent to an existing State owned overpass. Initial field
investigations indicate that the preferred location for the proposed force
main would be on the western side of the above described alignment.
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 8 of 13
Pease Associctes Architects -Engineers B 3

Golf Course Improvements
The golf course currently pumps water directly from the City of
Thomasville's water distribution system via a pumping station located
adjacent to the club house at the golf course. Water is pumped directly
into the golf course's existing irrigation system. The existing pump
station is an above ground enclosure housing two 30 hp pumps each with
a capacity of approximately 375 gpm.
In order to prevent a cross connection and possible contamination of the
City's potable water system, the golf course irrigation system will need to
be completely disconnected from the existing pump station and City
water system. A new storage tank and pump station is recommended to
be built adjacent to the golf course's maintenance yard, off of Jacob Street,
at the western edge of the golf course.
The storage tank is needed to provide equalization storage. Equalization
storage is defined as the amount of water required to meet water system
demands in excess of delivery capacity available from the supply source.
In this case storage is being provided to make up the difference between
irrigation system demands and pumping capacity at the treatment plant,
as illustrated below:
Golf Course Irrigation System Demand Requirements:
1,200 gpm for 12 hours = 864,000 gallons
Treatment Plant Reuse Pump Station Capacity:
700 gpm for 12 hours = 504,000 gallons
Needed Storage at Golf Course:
864,000 gal - 504,000 gal = 360,000 gallons
It is recommended that the City construct a ground level, welded steel
storage tank with a capacity of approximately 360,000 gallons. It is
recommended that two 30-hp vertical turbine pumps be located in a vault
adjacent to the storage tank. It is recommended that each pump have a
pumping capacity of approximately 600 gpm at a TDH of approximately
100 feet.
System Operations
Under normal operating conditions, treated effluent will enter the
effluent metering vault at the WWTP for discharge to Hamby Creek.
Typically, effluent will be released to the creek. At such time that the golf
Hamby Creek W WTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 9 of 13
Pease Associates Architects -Engineers B.3

course initiates irrigation, either manually or by an automated program,
pumps at the golf course will begin drawing water out of the storage
tank. As the level in the storage tank begins to drop, a signal will be sent
to the WWTP to turn on the reuse pumps located in the effluent metering
wet well. One pump will run until the storage tank at the golf course is
full.
Should one of the pumps fail, the second pump will automatically begin
pumping. Should both pumps fail, treated effluent will continue to be
released to Hamby Creek as normal. Back-up power for the effluent
metering pumps is not required since effluent is continuously being
released to Hamby Creek through the wet well structure regardless of
whether or not the pumps are running.
Flow Metering and Effluent Monitoring
Flow metering, UV disinfection, and online monitoring of turbidity will
be provided within the proposed UV disinfection building, proposed to
be constructed as part of the treatment plant upgrade.
The construction cost estimate for the proposed effluent reuse system is
approximately $1.9 million. This estimate is included in Section 5.0
(Present Worth Analysis).
Sludge Handling
As discussed above, a new DAF thickener is proposed to thicken the
secondary sludges prior to transfer to the existing anaerobic digesters that
have sufficient detention time to meet sludge -age requirements of the 503
Regulations for Class B sludges at 6.0 MGD. A new anaerobic digester
mixing system is proposed as well as new heat exchangers and purge
units.
Per the plans and specifications submitted for review, all digested solids
shall be stored in covered storage tanks. Digester gas will be used as fuel
for boiler/heat exchangers and any waste gas from the digesters will be
flared to reduce odors from this operation.
The two existing primary clarifiers at the plant will be abandoned in the
new BNR process. Therefore, the existing primary clarifiers components
will be removed and the clarifiers used as emergency sludge storage for
digested residuals.
More details are discussed in Section 4.3, Biosolids Management
Hamby Creek W WTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 10 of 13
Pease Associates Architects - Engineers B.3

Administrative Offices
The existing Laboratory and Administrative Offices are cramped for
space. Also the City is presently conducting analyses and storing samples
at another location as part of its Industrial Pretreatment Program. To
consolidate this effort with the other on -going plant analyses, it would be
advantageous to provide additional space within the Administrative
Offices for combining operations.
The existing Administrative Offices also contain the WWTP
instrumentation and monitoring panel. The existing analog -type
instrumentation system is expensive to maintain and it is difficult to
obtain spare parts. It is, therefore, suggested that this system be replaced
with a new PC -based digital system. This up-to-date approach will assist
in operation as well as in record keeping and monitoring of the plant.
To provide for the additional chemical analyses and to accommodate the
new instrumentation, it is proposed that the current Administrative
Offices be modified and enlarged.
Effluent Outfall
The present effluent from the WWTP discharges into a 30-inch-diameter
outfall, which parallels Hamby Creek to a point 6,700 feet downstream of
the WWTP. As discussed in Section 3.2, the NCDENR model analysis
indicated that there is no difference in impact to the stream if the effluent
is discharged at the WWTP or at the existing 30-inch discharge point.
A hydraulic analysis of the existing 30-inch outfall was conducted to
determine if the expanded flow of 6 MGD could be accommodated by the
existing outfall. The analysis indicated that the expanded flow of 6 MGD
could be accomodated by the 30-inch outfall (See calculations in
Appendix I).
Biosolids Management
A Sludge Management Study was completed for the City of Thomasville in
December 1989. The Study analyzed and compared several alternative
approaches to managing biosolids (sludges) from Thomasville. Since that time,
changes have occurred and the effects of the proposed treatment upgrade need
to be incorporated and evaluated. This section examines the options feasible to
the City and updates costs and factors considered in the earlier report.
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Pease Associates Architects -Engineers Page 11 of 13
B.3

Major relevant changes, which have been incorporated, include:
1) The land application option, which utilized contracted services for
hauling liquid sludges, incorporated a costly 1.3-MG concrete storage
tank for four months of storage of liquid sludges. The present selected
plan reduces the capital costs for this proposed tank by utilizing the
existing reaeration lagoon for storage.
2) An additional option to consider is transporting dewatered sludges to the
City of Thomasville for the manufacture of compost.
Based on these two changes, three new sludge management alternatives were
economically compared:
1) Alternative A, which is to utilize the lime stabilization process using the
N-Viro process (using updated factors);
2) Alternative B, which is to utilize the land -application process using
contracted services to land apply wet anaerobically digested sludges to
permitted land; and
3) Alternative C, which is to haul dewatered belt filter press sludge cake to
the City of Thomasville for composting.
The economic comparison that includes development of capital costs and
operation and maintenance as well as a present -worth analysis for the biosolids
options is given in Appendix H and summarized below.
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Page 12 of 13
Pease Associates Architects - Engineers B.3

ALTERNATIVE BIOSOLIDS MANAGEMENT PLANS
Alternative
Capital Costs
Annual O & M
Salvage Value
Present Worth
A
$1,393,100.00
$112,700.00
$348,000.00
$2,423,000.00
B
316,250.00
154,900.00
63,300.00
1,823,700.00
C
813,000.00
115,000.00
406,500.00
2,667,800.00
As presently practiced, Alternative B—Land Application of Wet Sludges —is still
the most economical approach as illustrated above. It is recommended that this
technique be continued. The City plans to maintain its contracts with its residuals
management contractor, EMA, to provide suitable disposal sites as required for
the 20-year planning period.
Sludge volume calculations at the new design flowrate of 6.0 MGD, a copy of the
City's contract with EMA, and documentation by EMA of adequate land capacity
for sludge disposal for the 20-year design period are provided in Appendix J.
N:\2002032-00\CFile\Phl-4\Report-Study\20020320005020105020105npdespermitmod.doc
Hamby Creek WWTP NPDES Permit No. 0024112 Modification
Pease Commission No. 2002032.00
Pease Associates Architects -Engineers Page 13 of 13
B.3

Hamby Creek WWTP NC 0024112 Permit Modification
B.5.b Are the planned improvement of implementation schedule required by local, state, or
federal agencies? Yes/No
Improvements required to meet new NPDES permit limits set by NCDENR, Division
of Water Quality (DWQ).
B.5.c If B.5.b "yes", briefly describe, including new maximum daily flow rate.
The proposed new average daily flow is 6.0 MGD. Improvements required based on
new Total Phosphorus (TP) effluent limit. To meet this limit, a Biological Nutrient
Removal (BNR) system is designed as well as new final clarifiers and effluent filters.
Additional processes are included to replace existing deteriorated equipment and/or
meet the expanded flow rate of 6 MGD. These processes include new influent
screening, new vortex grit removal, new UV disinfection, new post aeration, upgraded
sludge thickening and sludge digestion, upgraded chemical storage and feed facilities,
and other miscellaneous equipment to complete the scope of the upgrade and expansion
project. See Attachment B.3
N:\2002032-00\CFile\Phl-4\Report-Study\ Hamby Creek WWTP NC 0024112Permit Modificatlon0201Q5.d0
Pease Associates Architects - Engineers

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
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?
® 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. 5
b. Number of CIUs. 4
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: Valsoat
Mailing Address: 1015 Trinity Street
Thomasville NC 27360
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
This facility cleans test & reconditions drums & totes
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): Clean reconditioned drums & totes
Raw material(s): caustic soda sulfuric acid ferricchloride calcium chloride oraestol A3040 LTR oreastol 254D
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 (glad) and whether the discharge is continuous or intermittent.
15,000 glad (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 (glad) 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 ® Yes ❑ No
b. 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 755" & 7550-22. Page 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ® 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. 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 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.)
FA 5. 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.
END OF PART F.
REFER TO 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 19 of 21

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Modification Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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 of, an approved pretreatment program?
® 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. 5
b. Number of CIUs. 4
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: Thomas Mfg Inc
Mailing Address: 1024 Randolph Street
Thomasville NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture of brass & cooper plumbing supplies
F.5. Principal Product(s) and Raw Materiai(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Plumnino valves & fittings
Raw matenal(s): Brass & cooper plating
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.
30,000 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.
5,500 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
SIC-3471433
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ® 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. 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 CERCLA/RCRAlor other remedial waste originates (or is excepted to odgniate 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.)
FA 5. 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):
It. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO 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 19 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
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?
® 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. 5
b. Number of ClUs. 4
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: Hill Hosiery Mill Inc
Mailing Address: Post Office Box 2127
Thomasville NC 27361-2127
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacturing dyeing finishing boarding & packaging socks
F.S. Principal Product(s) 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): Hosiery
Raw material(s): Yam dye chemicals dying assistants
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the ootlection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
8,000 gpd ( continuous or X 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.
1,400 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
EPA Form 3510-2A (Rev. 1.99). Replaces EPA fortes 7550-6 & 7550-22, Page 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin - Pee Dee
FS. 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:
FA 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 CERCLAIRCRAJor 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.
END OF PART F.
REFER TO 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 19 of 21

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Hamby Creek WWTP, NCO024112 Modification Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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 of, an approved pretreatment program?
® 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. 5
b. Number of CIUs. 4
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: Singer Hosiery Mill Inc
Mailing Address: Post Office Box 758
Thomasville NC 27361
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Knil dye board & finish socks
F.5. Principal Product(s) and Raw Materlal(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal produc(s): Socks
Raw matedal(s): Yarn & dye chemicals
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 ( continuous or X intermittent) When Running
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.
300 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. 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 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ® 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 Amours[ nit
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remedlation 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.)
FA 5. 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.
END OF PART F.
REFER TO 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 7550-8 8 7550-22.

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
Ali 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?
® 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. 5
b. Number of CIUs. 4
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. It 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: Post Office Box 1847
Thomasville NC 27361
FA. Industrial Processes. Describe all the Industrial processes that affect or contribute to the SIU's discharge.
Minor Manufacturing
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): Mirrors printed glass fabricated glass products
Raw materal(s): Glass paint silver, cooper. inks
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.
22,500 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.
2,500 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
433
EPA Form 351 D-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ❑ 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
FA I. 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. Remedlation 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 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.
END OF PART F.
REFER TO 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 8 7550-22.

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin - Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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?
® 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. 5
b. Number of CIUs. 4
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: Strouoe Mirror Company
Mailing Address: Post Office Box 728
Thomasville NC 27361
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Fabrication to customer specifications of clear glass & mirrored stock sheet Converts clear glass to mirror.
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): Beveled Edge Minors glass mirrored stock sheets
Raw materal(s): [Tear & tinted glass silver, copper mirror backing Paint cerium coolant water, mild detergent
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.
90,000 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.
4 100 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. Categorical pretreatment standards ® 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 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
-T
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 M 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 Numbs Amoun Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATIONICORRECTIVE 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 Drigln. Describe the site and type of facility at which the CERCLAIRCRAIor 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.
END OF PART F.
REFER TO 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 19 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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?
® 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. 5
b. Number of CIUs. 4
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 addi0onal pages
as necessary.
Name: Images of America Inc
Mailing Address: Post Office Box 1127
Thomasville NC 27361-1127
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Electroplated tubular steel frames
F.5. Principal Product(s) and Raw Materiai(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Manufacturing chairs tables etc
Raw material(s): Steel nickel chrome steel tubing brass cyanide
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 ( continuous or X 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.
1,000 gpd ( continuous or X intermittent)
F.I. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. Categorical pretreatment standards ® 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 8 7550-22, Page 16 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ® 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. 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 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.
END OF PART F.
REFER TO 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 7550-0 & 7550-22. Page 19 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin — Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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?
® Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the numberof each of the following typeset
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 5 __
b. Number of ClUs. 4
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: Celand Yam Dvers
Mailing Address: Post Office Box 2220
Thomasville NC 27361-2220
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Spun Yarn received in natural colors & dyed to specified colors
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): Dyed cotton yams Polyester yams & acrylic yams
Raw material(s): Cotton polyester, acrylic yams dves-organic hydrocarbons dyeing assistants -organic hydrocarbons finishing chemicals
softeners & waxes.
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.
450,000 gpd ( continuous or X intermittent) Batch
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.
1,500 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits M Yes ❑ No
b. 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 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 M 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. 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 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.
END OF PART F.
REFER TO 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 19 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
Yadkin - Pee Dee
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
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?
® 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. 5
b. Number of CIUs. 4
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
Mailing Address: 216E Holly Hill Road
Thomasville NC 27360
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Processing chemicals for textile
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 chemicals & auxiliaries See Attached sheet Exhibit 1
Raw material(s): See Attached sheet Exhibit 2
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.
1,000 gpd ( continuous or X 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.
600 gpd ( continuous or X intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
EPA For 3510-2A (Rev. 1-99). Replaces EPA fors 7550-6 & 7550-22. Page 18 of 21

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Hamby Creek WWTP, NCO024112
Modification
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 ® 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. Remediatlon 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 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.
END OF PART F.
REFER TO 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 8 7550-22.

FIXING AGENTS
CCOFIX C-82 - A fixing agent for direct dyes
ellulose, antibleeding agent for prints.
iCOFIX AS LIQUID - A fixing agent for acid
on nylon and blends to produce superior
ifastness.
.ARRIERS/DYE TRANSFER
AGENTS I
CO CARRIER LO - Non -chlorinated carrier for
Eyeing of polyester.
CO CARRIER NTE - A self -emulsifiable liq-
carrier for polyester and polyester blends.
able for atmospheric or HT dyeing.
SPECIALAUXILIARIES
SCOLUBE T -Highly effective nonionic/ an-
c dyebath lubricant.
SCOSPERSE FR 106 - Effective leveling agent
fiber reactives on cotton. Excellent
patibilizing agent. Minimizes backstaining
otton with all dyes.
SCOSTABE 246 -A silicate free stabilizer for
,di baths containing hydrogen peroxide.
PCOLATE 24 - Sequestering agent (EDTA
z).
?SCO BINDER PAD - Soft pigment padding
3er; no roll buildup; good fastness properties.
,able for pigment printing.
rIMIGRANT PAD - Effective andudgrant for
went pad dyeing.
XILIARY 218 - Concentrated softener for pig -
at pad dyeing.
YEDGE GUM SNC SERIES - Solvent -based
ns; prevents cut edges from curling; suitable
tricot fabrics (except acetate and its blends)
i is especially recommended for nylon and
Ion blend fabrics.
LyEDGE GUM NP - Water based anti -curling
in to be used on knit fabrics.
7FTFNEF
DEPCOSOL CAW SERIES - Non -yellowing cat-
onic softeners for cotton, rayon and wool.
DEPCOSOL NIS SERIES - Non -yellowing non-
ionic softeners for cotton and polycotton blends
when finishing with a resin; napping softener
with soft hand.
DEPCOSOFT NP - a napping softener that gives
a scroopy hand on nylon and triacetate fabrics
and imparts lubricity without slippage.
GRESCOSOFT 1 S36 SERIES - Cationic softeners
for cotton, cotton/polyester knits, cotton/poly
terry cloths and knitted acrylic fibers.
GRESCOSOFT PEM SERIES - Nonionic softeners
for durable press resin application on cellulose
and cellulose/polyester blends.
CAUTION.,
We recommend that, at the minimum, gloves and
protective goggles be worn when handling any
chemical. Material Safety Data Sheets from
Gresco should be read prior to and in connec-
tion with the application of our products.
DISCLAIMER
Information contained herein is to our best
knowledge true and accurate, but all recommen-
dations or suggestions are made without guar-
antee. Since conditions of use are out of our con-
trol, Gresco disclaims any liability incurred in
connection with the use of our products and in-
formation contained herein. No person is autho-
rized or empowered to make any statement or
recommendations so made shall bind Gresco.
Furthermore, nothing contained herein shall be
construed as a recommendation to use any prod-
uct in conflict with existing patent covering any
material or its use, and no license implied or in
fact is granted herein under the claims of any
patents.
GRESCO
216 East Holly Hill Road
Thomasville, NC 27360
Phone: [phone]
Fax: [phone]
Textile
Chemicals
Auxiliaries
Corporate Quality Policy
I
to
H
•5
N
Gresco is totally committed to providing
products and services that meet our
customer requirements and expectations in
a timely and cost-effective manner.
Management's goal is to involve every
employee in the continuous quality
improvement of our operations, and
encourage full participation in Gresco's
total quality efforts.

ANTIFOAM M90 - Stable silicone defoamer for use
in atmospheric scouring, dyeing and finishing
baths.
ANTIFOAM 8100 - Stable amino -functional sili-
cone defoamer for atmospheric and high tem-
perature wet processing and finishing.
ANTIFOAM Q - Non -silicone defoamer for atmo-
spheric or HT dyeing; readily redispersible.
GRESCO DESIZE 24 - A high temperature stable
alpha amylase enzyme for starch desizing.
CO -LASE SERIES - Cellulase enzymes for cellulo-
sics to improve hand, appearance; minimize
fuzzing and pilling.
GRESCO WASH SERIES - Cellulase enzymes for
cellulosics to provide washdown properties; im-
prove hand and appearance.
PEROXZYME C - Catalase enzyme for hydrogen
peroxide decomposition.
PRO -LASE SERIES - Protease enzymes for wool,
silk, etc.
•1J0LM!
OPTIC WHITE PAR - Opticalbrightener for acrylic
and modacrylic fibers; neutral cast.
OPTIC WHITE CD300 - Optical brightener for
cellulose and nylon; reddish cast.
OPTIC WHITE BU - Optical brightener for cellu-
lose and nylon; bluish cast.
OPTIC WHITE CF - Optical brightener for nylon
and acetate.
OPTIC WHITE PE - Optical brightener for poly-
ester; bluish cast.
OPTIC WHITE PER - Optical brightener for poly-
ester; reddish cast.
MODIFIERS
DEPCO RESIN R206 - A highly concentrated co-
polymer for improving fabric drapeability and
hand.
GRESCO FINISH SRF- Fluorochemical soil release
properties.
GRESCO BINDER NAM - An efficient copolymer
for improving fabric resiliency and anti -snagging.
RESIN 39 - A copolymer for providing a soft hand
and reduce pilling.
LEVELING AGENTS
DEPCONOL I I I - Highly recommended as a lev-
eling agent in dyeing of cotton and acrylics.
GRESCOLEV C - An anionic leveling agent for
direct dyes.
GRESCOLEV NL - A nonionic leveling agent used
in dyeing polycotton, acrylic -cotton and nylon
blends.
GRESCONOL LP - A nonionic dye leveling agent
for acid, neutral and basic dyes; antiprecipitant
for acid/basic dyes on nylon and acrylic lends.
GRESCOSPERSE 343-H - Anionic leveling and
dispersing agent for acid and premetallized dyes
on nylon, wool and their blends; and disperse
dyes on polyester; also an excellent
compatibilizer.
DEPCOLEVEL JDS - An anionic dispersing agent
exhibiting excellent leveling and penetrating
qualities for acid and disperse dyes on nylon tri-
cot, acetate tricot and blends of both fibers.
DEPCOSPERSE LQD - A nonionic leveler/dis-
persant/lubricant used alone or with an emulsi-
fied carrier system for HT polyester dyeing.
DYEING ASSISTANT BK-A versatile anionic wet-
ting/dyeing assistant and leveler for use in one -
bath scouring and dyeing of cotton and synthe-
tics.
GRESCOTRGE JL - Highly effective workh
nonionic scouring agent.
GRESCOSCOUR JNF Low foaming noni
scouring/wetting agent for jets.
GRESCOSCOUR AQL-2 - Excellent caustic st
ity. Efficient anionic for scouring and/or ble
ing.
GRESCO WET 200 - Highly concentrated ani
wetting and rewetting agent for all types c
bers.
GRESCOTERGE NAN- Concentrated all purl
workhorse, nonionic scouring and wetting of
GRESCOSCOUR SOL - Low foaming, low c
solvent scour.
JET CLEANER 339 - Nonionic cleaner for je: c
ing equipment. Suitable for use with caustic
hydro.
MIGRATING/RETARDER
AGENTS
DEPCOLEVEL 12S2 SERIES - Cationic level
agents for use with basic dyes on acrylic fibc
DEPCO RETARDER SERIES - Cationic retard
agents for basic dyes on acrylic fibers.
PRINTING AGENTS
AUXILIARY 218 - A concentrated softener for l
ment printing that gives soft prints, improi
smoothness and ruining properties with no c
rimental effects on wetfastness.
BINDER 813 - An extra durable binder desigr
to carry metallic powders for printing and cc
ing of all types of natural and synthetic fabri(
LOW CROCK 100, 321 -Anticrocking agents
aqueous and oil phase pigment printing on
types of fabrics.
RESIN 39 - A polyacrylate emulsion resin bin(
for pigment printing; excellent durability; s
hand; also recommended for pigment paddir

8/10/01 at 09:34:19.92 BXHIBIT 2 Pace: 3
Gresco Manufacturing, Inc.
Inventory Valuation Report
As of Aug 31, 2001
Filter Criteria includes: 1) IDs from RM0001 to RM4000; 2) Active Items; 3) Stock item. Report order is by ID. Report is printed with Tnmcated Long
Descriptions.
Item Description
WRL 01395
POLYSTYRENE 666
CARBOPOLPRT
ASTRO SET ST-ACB
CYANAMER P-21
MAGNASOFT HSSD
KF 28 GEL BASE
ULTRASOFT CPE-35
GMS
ULTRASOFT NPE-40 (WAS V
TAYLOR 101
METHOCELF4M
DIETHANOLAMINE
FORMALDEHYDE 37%
INDIAGE RFW
ECOSTONE L 300
TANCOSET TA-501
DITONATIOUS EARTH-CELA
PRIMAFAST SGL (PRIMFAST
HYDROGEN PEROXIDE 35%
INDIAGE MAX L
MACROLEX BLUE RR
OPTISIZE 160
OPTISIZE HT 520
INDIAGE NEUTRA G
INDIAGE SUPER GX
2-ETHYL HEXANOL
DA-6 ISODECYL ALCOHO
LAURIC ACID FLAKE
RETARDER 276 G
ADOGEN 442
SORBITOL 70°/u
WACKER HDK N-20
RAW MAILS NO COST
RAW MAILS MISC @ .10 LB.
MAGNASOFT HWS
ETHAL DA-4(DO NOT USE)
CALCIUM PEROXIDE
MB-EASE HPA
OEPCOSOL CAW 100
DDBSA ACID FORM
FINISHED GOODS @ NO COS
FINISHED GOODS @ .10 LB
MAGNESIUM PEROXIDE
HODGSON 3449
AF-2340
ETHOX TAM 100 70%
PARANOL VA-928
ACETIC ACID 84%
CALCIUM CHLORIDE
DIPROPYLENE GLYCOL
HBCD(HEXABROMOCYCLO
AA-A41 PARA CHEM
PYROSANS-FRC
DECARBROMODIPHENYL O
EXOLIT AP 422
THPC,UREA PRE-CONDENS
PHT-4
ALBRIGHT & WI SON ABN
PHOSPHORIC ACID
FYROL FR-2
ETHAL DA4
ANTIBLAZE NR-25
SOLKA FLOC 300
ATH

dWAT�c
�QG
Michael F. Easley, Governor
O�
State of North Carolina
WilliG. Jr., Secretary
to r
Department of Environment Nat ral Resources
7 ={
O .0
Alan W. Klimek, P.E., Director
Division of Water Quality
April 8, 2004
MEMORANDUM
TO: Hannah Stallings
Construction Grants & Loans Section
FROM: Mike Templeton
NPDES Unit
SUBJECT: City of Thomasville Project No. CS370619-02
Revised Draft Environmental Assessment, 2/4/2004
NPDES Permit No. NCO024112
Davidson County
I have reviewed Thomasville's revised draft environmental assessment (EA) on behalf of the NPDES
Unit and offer the following comments. Feel free to call me at 733-5083, ext. 541, if you have any
questions or comments on these.
Effluent Limitations. Table 1 of the EA lists existing discharge limits and speculative limits for the
facility. Several of the speculative limits are incorrect.
• The speculative limits for BODs and ammonia are based on DWQ's letter of March 30,1995.
The Division has since established new permitting strategies in its Yadkin -Pee Dee River
Basinwide Water Quality Plan (1998, 2003), and these speculative limits should no longer be
used for planning purposes.
The permitting strategy in the Yadkin -Pee Dee plan calls for no increase in loading from
existing discharges to the Abbotts Creek Arm of High Rock Lake. In its 2001 comments, the
NPDES Unit referred to the Plan and noted that "the City should expect that discharge
limitations for BODs and ammonia for any expansions above 4.0 MGD will be no greater that
the currently permitted levels on a mass basis. Where the concentration -based speculative
limits developed in 1995 differ from these mass limits, the more restrictive of the two shall
apply." The revised EA still does not appear to reflect this strategy.
The City's current limits for BODs and ammonia are 5 mg/L and 2 mg/L, respectively
(summer). Assuming the ultimate CBOD is 2.0 times the BOD5 limit and ultimate NBOD is 4.5
times the ammonia limit, the load allowed under the current permit is:
((5 x 2.0) + (2 x 4.5)) mg/L x 4.0 MGD x 8.34 = 634 lb/day (summer)
Using the speculative limits given in 1995, the load would increase substantially with the
expansion:
((5 x 2.0) + (1 x 4.5)) mg/L x 6.0 MGD x 8.34 = 7261b/day (summer)
In order to maintain the currently permitted load at the higher flow limit, the Division must
reduce either the BOD5 limit or the ammonia limit or some combination of the two. The
following table summarizes the above results and shows possible combinations of BOD5 and
ammonia limits (summer) that would maintain the current loading at 6.0 MGD:
North Carolina Division of Water Quality [phone]
1617 Mail Service Center FAX [phone]
Raleigh, North Carolina 27699-1617 On the Internet at http://h2o.enr.state.nc.us/

City of Thomasville - Draft Environmental Assessment
April 8, 2004
Flow
(MGD)
BODs
(mglL)
NHrN
(mqk)
Load
(Iblday)
4.0
5.0
2.0
634
6.0
5.0
1.0
726
6.0
5.0
0.6
634
6.0
4.5
0.8
634
6.0
4.0
1.0
634
6.0
3.5
1.3
1 634
6.0
1 3.0
1 1.5
1 634
These results are presented for illustration only and are not intended to represent new
speculative limits.
• Upon permit renewal or modification, the Division will add weekly average limits for
ammonia to implement a recent policy change. The new ammonia limits will be three times
the corresponding monthly average limit. This change is being implemented in municipal
permits state-wide and is necessary to ensure consistency with federal NPDES regulations. (In
similar fashion, non -municipal permits will receive daily maximum limits set at six times their
monthly average limits.)
• The speculative limits for metals and cyanide are based on faulty assumptions. These limits
are calculated to prevent the instream concentrations from exceeding NC water quality
standards. As permitted flow increases, the limits will be reduced. Upon receipt of the permit
application for expansion, the Division will evaluate effluent data and determine which
parameters require limits and what those limits will be.
• The revised EA references a 2aa set of speculative limits that were provided by letter on July
16,1999. There is no record of the letter in DWQ's Central Files. Please provide a copy for our
files.
Adequacy of Existing Discharge Line. The 2001 copy of the 201 Facilities Plan proposed to
discharge peak flows in excess of the discharge line's 10 MGD capacity into Hamby Creek adjacent
to the treatment plant. The NPDES Unit noted certain concerns with the proposal at that time. The
revised EA does not mention the proposed discharge, nor does it indicate whether the overflows are
still expected to occur. Please clarify how this matter has been resolved.
cc: Winston-Salem Regional Office
NPDES Files
2

n I e i C I D I E I F I G I H .I K I L
1 City of Thomasville Summer
2 Hamby Creek WWTP
3 NCO024112
4
5 Current Permit Limits:
6 BOD-t 5 mg(L
7 NH3-1 2 mgIL
8 0t 4MGD
2
4.5
6 MGD
t Permitted Load =
634 la BODWday
[(10 mg(L BOD x 2)«(4
mg4 NH3 x 4.5)) x 4 x 8.34
t'10&2' limits and 6.0 MGD:
726
BOD-2
NH3-2 Load-2
NH" BOD3
Load-3
5
0.59 634
1
4.08
634
4.5
OB1 634
0.9
4.31
634
3.0
4
104 634
0.8
4.53
634
35
126 634
03
4.76
634
3
148 634
0.6
4.98
634
2.5
2.5
1.70 634
0.5
5.21
634
2
193 634
0.4
5.43
634
2.0
1.5
2.15 634
0.3
5.66
634
_
1
2.37 634
0.2
5.88
634
05
2.59 634
0.1
6.11
634
g
1.5
z
z
10
OS
ordered
hin . Calcu
SOD NH3 Fora
05 26 CSOf
1.0 24
1.5 2.1
20 19
2.5 1.7
3.0 1.5
35 1.3
4.0 1.0
4.1 1.0
43 0.9
4.5 0.8
4.5 0.8
4.8 03
5.0 O6
5.0 0,6
5.2 05
5.4 0.4
53 03
5.9 02
For an Dan
= NH3 of: CBOD=
CBOD & NH3 for Fixed BODu Load
10 2.0 30 4.0 5.0 6.0 70
CBOD(mg&)
Name Reference
CBOW_BOD
�MMO$B$I1
NBODu_NH3N
�mmer!$B$12
Q1
�mmed$BSB
0_2
xumm rIM16
B00 1
�mmed$B$6
1300_2
x rnmeO.W24.W33
BOD_3
s Mmed$F$24:$FS33
NH31
�ummer!$B$7
NH3 2
�summerl$B$24:$B$33
NH33
�summen$ES24$E$33
Load-1
�summerl$D$18
Load 2
�summer!$C$24SC$33
Load 3
�Mnner!,Mt.$G$33
BOW Given
NH3-2 =(Loa�-HBOD_2'CBODu_BDD'O 2'8.34)Yt8.34'U'NBODUNH3N)
Load-2 =((BOE�-2'CBODu_BODN(NH3_2'NBODu_NH3N))'O_2'8.34
NH33 Given
BOD-3 =iLoad 1-(NH3_3'NBODu_NH3N'Q2'8.34)Y(8.34'02'CBODu_BOD)
Load-3 =((BOO_3'CBODu_BOD)+(NH3_3'NBODu_NH3N))'G_2'8.34
BODu loads.)ds, summer
&112005

A I B I C I D
E
F
G
H
J N L
1
City of Thomasville
Winter
2
Hamby Creek WWTP
3
NCO024112
4
5
Current Permit Limits:
6
WD-1 ID mg/L
7
*G-1 4 myL
8
a1 4 MOD
9
10
Aoume:
11
CBODwBOD 2
12
NBODu/NH3N 4.5
13
14
15
Future Discharge:
16
Q2 6 MGD
17
18
Current Penwhed Load = 1268
lb BODWday
19
((10 mgtL BOD x2)+ i4 mg(L NH3 x 4.5)f x 4 x
8.34
20
Load at"1062" limits and 6.0 MOD:
1,226
21
22
23
BOD-2 NH3-2 Load-2
NH3-3
BOD-3
Load-3
CBOD & NH3 for Fixed BON Load
24
12 030 1268
5
1.42
1268
25
11 0.74 1268
4.5
254
1268
6.0
26
10 1.19 1268
4
3.67
1268
27
9 1.63 126E
3.5
4.79
1268
28
8 2.07 1268
3
5.92
1268
5.0
29
7 2.52 1268
2.5
7.04
1268
1
30
6 2.96 1268
2
8.17
1268
4.0
31
5 3,41 1268
1.5
9.29
1268
_
32
4 3.85 1268
1
10.42
1268
E 3.0
33
3 4.30 1268
0.5
11.54
1268
34
s
z
35
20
36
37
1 0
38
39
40
41
-
1.0 2.0 3.0 4.0
5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0
42
43
CBOD (m94)
44
45
Data ordered
46
Ifor graphing Calcutators'.
BOD NH3 Fora Get
IForan
Get
Name
Beterence
47
48
1.4 5.0 CBOD of: NH3 =
NH3 of:
CBOD=
CBODu_BOD
=wmte0SBS 11
49
2.5 45 1 2.37
2.51
NBODu NH3N
=winter'SB312
50
3.0 4.3
O_1
=winter!$B$8
51
3.7 4D
O_2
=winter!$B$16
52
4.0 3.9
BOC_1
=winted$BS6
53
4.8 3.5
B00_2
=%vmAed$A$24:$A$33
54
5.0 34
BOD 3
=winted$F$24:$F$33
55
5.9 3.0
NH3-1
=winted$B$7
56
6.0 3.0
NH3-2
=winted$B$24:$B$33
57
7.0 2.5
NH3_3
=mnted$E$24:$E$33
58
7.0 2.5
Load_t
=Ynnted$D$18
59
60 2.1
Load 2
=- Med$C$24 $C$33
60
82 2.0
Load-3
=Ynnted$G$24 $G$33
61
9.0 1.6
62
9.3 1.5
13002 Given
63
10.0 12
NH3-2 -(Load_1-(BOD_2-CBODu_BOD'CL2'8.34)y(8.34'Q2-NBODt1_NH3N)
64
10.4 1.0
Load-2=((BOD_2'CBOW_BOD)+(N113_2-NBODu_NH3N))'LL2'8.34
65
11.0 0.7
NH3-3 Given
86
11.5 0.5
B003=(Load_l-(NH3_3'NBODu_NH3N'0-
2'8.34)Y(8.34'O 2'CBODu BOD)
67
12.0 0.3
Load-3=((BOD_3'CBODu_BOD)+(NH3_3'NBODu_NH3N))'0_2.8.34
68
BODu lcads.xls, winter
3M 112005

' flPli-2005 02:03PM FROM -Construction Grants And Loans
9I9'156229 T-952 P 00Z/002 F-57B
Permit NCO0241 12
Table 1. NPDES Effluent Limits for the Hamby Creek VHWTP
$FFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting through the expiation date, the Permittee shall be
authori2ed to discharge treated carasteaater from Outfall 001 subject to the following effluent limitations and
monitoring requirements:
E FF LU EN I i I MI[AIIV rva
h,.-m ,
-
- .•
EFFLUENT CN'ARACTERISTICS Mo tly',�-r-..`Weekly `` DaIIXy Moas,arement Sample
`'^ `-hAaximum�. r�Loratlon
Y • i''` :.rw 1^o
vote e�%�... Average.. '
r)-requency.r'r.
,Type-t s
4.0 MGD
Contnuous
Recording
I or E
now
600, 5-day, 20-C rat (Apr 1 - Oct 31)
5.0 mg/L 7.5 mg/L
Daily
Composite
I, E
(Nov 1- Mar 31)
10.0 mg/L 1S.0 mg/L
Total Suspended Solids lal
310.0 mg/L 45.0 mg/L
Daily
Composite
i, E
NH3-N, mg1L (Apr 1 - OR 31)
2.0 mg/L
Daily
Composite
E
(Nov 1- Mar 31)
3.0 mg/L
Fecal Collform (geometric mean)
2001100 mL 4001100 mL
Daily
Grab
E
Dissolved Oxygen
Dally average shall not be less than 6.0 mg/L
Dally
Grab
E
Shail be within the range of
Dally
Grab
E
pH
6.0 to 9.0 standard units at all times
Dally
Grab
E
Temperature, °C
Dally
Grab -
E
Conductivity, umhos/cma
E
Daily
Grab
Total Residual Chlorine
Total Phosphorus P1 (Apr 1- Oct 31)
N/A (mg/L)
31570 to seasonal total
Weekly
Seasonally
Composite
Calculaled ns
E
(Nov 1- Mar 31)
N/A (mg/L)
Weekly
Composite
I'I
E
`5)
Sptio b seasonal total
Seasonally
Calculated
Cadmium (ug/L)
2,1
Weekly
Composite
E
Lead (ug/L)
26.7
Weekly
Composite
E
Nickel (ug/L)
26.7 261.0
Weekly
Composite
E
Cyanide (ug/L)
5.3 22.0
Weekly
Grab
E
Chromium (ug/L)
2/Month
Composite
E
Capper (ug/L)
2/Month
Composite
E
Sliver (ug/L)
2/1VIonth
Composite
E
Zinc (ug/L)
2/Month
Composite
E
(ug/L)
Monthly
composite
E
Mercury
Monthly
Composite
E
Total Nitrogen
Cerladaphnia, P/F @ SO% t'l
Quarterly
Composite
E
Chronic Toxicity
_
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Footnotes:
(t) Sample locstiotrsa I - Influent, E - Efflueot
(2) -a' moothly avctzgc eftlumi HOD, and Iota Suspended 5obds conecaurations shall roc e[cced 13% of the sespeenve in0ucnt values.
(3) Efaucnt limitauom for Total phosphorus ah.0 txeomc effective April 1, 2004. Monitoring rcquicemeau sb%U apply, bcgunning on time
effeem•c date of the permit. Momtocin5 for tool phosphorus sball be conducted and eelcutated is prescnbed above aad is Condiuon A.(Y)
of du pcttnic
(4) See Condition A.(4.) of this permit.
e

9197156229 T-952 P 001/002 F-578
Q fb-2005 02:03PM FROM -Construction Grants And Loans
thetnosvillc - 10 jun 20D4 rev. to draft ea U
Subject: thomasville - 10 jun 2004 rev, to draft ca
From: Mike Templeton <[e-mail]
Date: Tue, 24 Aug 2004 12:12:52 -0400
To: Hannah Stallings <[e-mail]
CC: Lamy Horton <[e-mail]>
Hannah -
Post -it' Fax Note 7671
11103Ilb ar
p`apoeeI 2
To
ei
From
Ca1DOPr.
Ca.
Phone 1
Prone
Fax it
Fax 11
I have reviewed the revised draft EA (including the copy of Appendix I you provided) for
Thomasville's proposed expansion to 6.0 MGD capacity. The responses to my 4/8/04 comments, and
the resulting changes in the draft EA, appear to be satisfactory. However, I offer one final comment for
your consideration.
Outfall Hydraulic Capacity. Earlier versions of the document set the outfall line's maximum capacity
(gravity flow) at 10.0 MGD and proposed that excess flows be discharged to Hamby Creek adjacent to
the WWTP. We expressed reservations about such a bypass. This draft presents the results of computer
calculations (Appendix I) demonstrating that the capacity should be 15.0 MGD or more. Given the
significatice of the issue, I suggest that the calculations, and any other documentation of the line's
capacity, should be scaled and signed by a NC P.E. before we approve the final EA.
Mike Templeton
Michael E. Templeton. P.E.
North Carolina Division of Water Quality
Point Source Branch
1617 Mail Service Center, Raleigh, NC 27699-1617
919-733-5083 x541 FAX: [phone]
mailto:[e-mail]
9/28/2004 12:57 PM
t nfl

4 4 1 #
DENR # 1112
DWQ# 12857
DIVISION OF WATER QUALITY
Water Quality Section/ Point Source Branch
August 24, 2001
1f %MEGIM13
To: Milt Rhodes
DWQ SEPA Coordinator
From: Mike Templeton
NPDES Unit
Subject: City of Thomasville
201 Facilities Plan and Environmental Assessment, January 2001
NPDES Permit No. NCO024112
Davidson County
I have reviewed Thomasville's 201 facility plan and environmental assessment (EA) and offer the
following comments. Feel free to call me at extension 541 if you have any questions.
Regional Alternatives. In February 2001, the Division met with representatives of Thomasville,
Lexington, and Davidson County to discuss wastewater management issues and, in particular, nutrient
controls to protect water quality in High Rock Lake and its tributaries. In that meeting, the city and
county representatives expressed interest in and agreed to explore treatment and disposal options on a
more regional scale. The 201 plan and EA should be updated to describe any recent progress regarding
regional wastewater alternatives.
Reuse Alternatives. The 1998 Basinwide Plan recommends no new dischargers in the Hamby Creek
drainage and encourages Thomasville (and Lexington) to aggressively pursue reuse options before
requesting approval for additional loadings. The Division reiterated the strategy at the February meeting
and noted that the results of more recent water quality monitoring support continuing this approach. The
201 plan and EA should be updated to describe any recent progress regarding reuse alternatives.
Effluent Limitations. Consistent with the strategy in the 1998 Basinwide Plan, the City should expect
that discharge limitations for BOD5 and ammonia for any expansions above 4.0 MGD will be no greater
than the currently permitted levels on a mass basis. Where the concentration -based speculative limits
developed in 1995 differ from these mass limits, the more restrictive of the two shall apply. The 201 plan
and EA should be updated to reflect this necessary change in design effluent quality.
Adequacy of Existing Discharge Line. (Section 3.1.7, Preferred Alternative; Figure 3, Proposed
WWTP Flow Diagram; and Appendix B, Existing WWTP - Basis of Design) Peak flows in the expanded
wastewater system will exceed the capacity of the existing outfall line (10 MGD capacity, assuming
gravity flow). The City proposes to discharge the excess flows to Hamby Creek adjacent to the treatment
plant site.
The Division cannot presume to awrove the overflow at this time. Concerns over the potential impacts of
a discharge on water quality in Hamby Creek have already resulted in the City's relocating its outfall two
miles downstream of the plant site. In addition, the City's NPDES permit does not authorize a discharge
at a second outfall. Any proposed modifications to allow the second outfall must undergo public review
prior to approval.

1- •
City of Thomasville 201 Facilities Plan
August 24, 2001
Page 2
Before the Division can consider the overflow, the City must provide a more detailed description of the
anticipated discharge, such as frequency, duration, and quantity of the discharge events. The City must
also evaluate other reasonable means of managing these excess flows and demonstrate that the new
discharge point is the most economically feasible of the available alternatives. The analysis should
consider such alternatives as installing an enlarged outfall pipe, a second pipe, or a pump station to move
the additional flows, and providing flow equalization to reduce the peak flows through the plant. If the
analysis supports it, the Division will consider modifying the City's permit to authorize the outfall and
establish effluent limitations and monitoring requirements. It is reasonable for the City to assume that
any overflow to Hamby Creek must at a minimum meet advanced tertiary limits.
Mitigation of Secondary Impacts. (Sections 4.8.2, Existing Surface Water Quality, p. 10; 5.2.2,
Indirect and Cumulative Land Use Impacts, p. 21; and 6.2, Mitigation for Indirect and Cumulative
Impacts, p. 33) The document notes that surface waters in the Thomasville area are already impacted
by both point and nonpoint sources of pollution. Further, it is anticipated that growth will continue and
will potentially continue to threaten water quality in the streams. The 201 plan and environmental
assessment assert that the City will use existing plans and ordinances to prevent or mitigate these
impacts. In order to protect water quality in the area, it is imperative that the City continue to improve its
plans and ordinances and maintain its commitment to implementing them fully and effectively.
NPDES Effluent Limits. (Section 5.8.3, WWTP Effluent Impacts, pp. 24-25.)
IWCs. As noted in the 1995 speculative limits letter, the summer 7Q10 for current discharge
point is 0.43 cfs, and the instream wastewater concentrations for Thomasville's discharge
would be 941/o at 4.0 MGD and 96% at 6.0 MGD.
Phosphorus allocations. The seasonal Total Phosphorus allocations in the City's draft
NPDES permit are as follows:
• Summer (Apr -Oct): 3,570 lb TP, calculated as 0.5 mg/L at 4.0 MGD for 151 days;
equivalent to 16.7 lb/day.
• Winter (Nov -Mar): 5,040 lb TP, calculated as 1.0 mg/L at 4.0 MGD for 214 days;
equivalent to 33.4 lb/day.
These limits reflect changes in the nutrient control strategy for the Hamby and Abbotts
Creek drainages since the 1998 Basinwide Plan was issued.
Section 7.0, State and Federal Permits Required, p. 35. Note that:
• permits for wastewater collection projects are non -discharge but not NPDES permits and
• a separate non -discharge permit will also be required for any wastewater reuse project.
cc: Winston-Salem Regional Office
Lary Horton, CG&L Section
NPDES Files

t40
-i
-= DIVISION OF WATER QUALITY
February 21, 2000
To: Gloria Putnam
Local Government Assistance Unit
From: Susan A. Wilson
NPDES Unit
Subject: City of Thomasville EA
G MGD Expansion/ Rehab issues
NPDES No. NC0024112
Davidson County
I have reviewed portions of the Environmental Assessment submitted by Robert J.
Goldstein and Associates on behalf of the City of Thomasville. The proposed project
includes rehabilitation work to reduce inflow/infiltration (1/1) in the collection system
(and provide capacity for growth areas), as well as expansion of the current treatment
plant from 4 MGD to 6 MGD.
As stated in the Division's Yadkin -Pee Dee River Basinwide Water Dee River Basinwide Water Quall
Management PlanPlan (May. 1998) Hamby Creek is listed as Not Supporting its current
uses. Additionally, nutrient loading from major facilities have heavily impacted the
Abbotts Creek arm of High Rock Lake and the assimilative capacity in this area is
limited.
The facilities in this subbasin of the watershed are required to achieve substantial total
phosphorus reductions. As part of this strategy, the existing regional facilities will be
required to meet seasonal mass limits for phosphorus (based on 1997 permitted flows).
For the City of Thomasville, the plant expansion will require a total phosphorus value
for summer of 4000 pounds (approximately 17 lbs/day); for winter, 5000 pounds
(approximately 34 Ibs/day). These values should be incorporated into the planning
document. The current document specifies a total phosphorus limit of 0.5 mg/I for
summer and winter with the expansion to 6 MGD.
Although spray irrigation for the entire 6 MGD wasteilow may not be feasible, the City
should pursue any possible reuse of treated wastewater to reduce total loadings to
Hamby Creek. This may include discharge of treated wastewater onto golf courses,
recreational areas, etc. These scenarios must be investigated prior to application for
modification of the NPDES permit.
Should you, or the City, have further questions, please contact me at [phone],
ext. 510.
cc: Central Files
NPDES Files
WSRO/ Water Quality Section