NC0074268_Permit Issuance_20060315

Mr. Larry Cummings
City of Gastonia
P.O. Box 1748
Gastonia, North Carolina
Dear Mr. Cummings:
28053-1748
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
March 15, 2006
Subject: Issuance of NPDES Permit
NC0074268
Crowders Creek WWTP
Gaston County
Division personnel have reviewed and approved your application for renewal of the subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,1994 (or
as subsequently amended).
As previously noted, this permit contains a nickel limit that will take effect October 1, 2007.
After 12 months you may submit a request to have the limit and monitoring requirement reviewed
based on data submitted during the 12-month period.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty
(30) days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such
demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect the
legal requirements to obtain other permits which may be required by the Division of Water Quality or
permits required by the Division of Land Resources, the Coastal Area Management Act or any other
Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Toya Fields at telephone
number [phone], extension 551.
t'
cc: Central Files
Mooresville Regional Office/Surface Water Protection
NPDES Unit
Marshall Hyatt, EPA Region IV
Aquatic Toxicology
PERCS Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
512 N. Salisbury Street, Raleigh, North Carolina 27604 On the Internet at http://h2o.enr.state.nc.us/
An Equal Opportunity/Affirmative Action Employer
Noce hCarolina
7atura//y

Permit NC007.4268
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 Gastonia
is hereby authorized to discharge wastewater from a facility located at the
Crowders Creek Wastewater Treatment Plant
off U.S. Highway 321 south of Gastonia
Gaston County
to receiving waters designated as Crowders Creek in the Catawba 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 April 1, 2006.
This permit and the authorization to discharge shall expire at midnight on August 31, 2010.
Signed this day March 15, 2006.
n W. Klimek, P.E. , Director
'vision of Water Quality
By Authority of the Environmental Management Commission

Permit NC0074268
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 Gastonia is hereby authorized to:
1.Continue to operate an existing 6.0 MGD wastewater treatment facility that includes the
following components:
••• Mechanical bar screen
••• Grit removal
❖ Influent pump station
•2 Dual primary clarifiers
❖ Dual anoxic/oxic basins for biological phosphorus removal (includes anaerobic
basins with mechanical mixers and aerobic basins with diffused aeration)
:• Dual final clarifiers
• Two polishing/stabilization ponds
❖ Chlorine contact chamber (gas)
❖ SO2 dechlorination
• Static post aerator
•3. Dissolved air floatation (DAF) unit
••• Fouranaerobic digesters
❖ Gravity sludge thickener
❖ Filter belt press dewatering unit
❖ Alum and caustic addition
This wastewater treatment facility is located at the' Crowders Creek Wastewater
Treatment Plant off U.S. Highway 321 south of Gastonia in Gaston County.
2. Discharge wastewater from said treatment works at the location specified on the attached
map into Crowders Creek, 'classified C waters in the Catawba River Basin.

USES Quad:. Name: Gastonia South
Receiving Stream: CrowdersCreek
Stream Class: C
SublaOni Catawba 03-08-37
Lat.: 35°10'10':
Long.: 81°11'48"

.c
• k • Permit NC0074268
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as
sp
EFFLUENT
CHARACTERISTICS
_
'LIMITS
Daily
Maximum
MONITORING
Measurement
Frequency
REQUIREMENTS
Sample
T rpe
Recording
Sample,
Location'
I or E
Monthly
Average
Weekly
Average f
Flow
6.0 MGD
Continuous
BOD, 5-day, 20°C2
13.0 mg/L
19.5 mg/L
Daily
Composite
I and E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3 as N
(April 1- October 31)
2.0 mg/L
6.0 mg/L
Daily -,
Composite
E
NH3 as N
(November 1-March 31)
10.0 mg/L
30.0 mg/L
Daily
Composite
E
Dissolved Oxygen3
Daily
Grab
E, U, D
Fecal Coliform
(geometric mean) 4
200/100 ml
400/100 ml
Daily
Grab
E, U, D
Temperature
Daily
Grab
E, U, D
Total Residual Chlorines
28 pg/L
Daily
Grab
E
Conductivity
_
3/week
Grab
E, U, D
Total Nitrogen (NO2+ NO3 + TKN)
(April 1- October 31)
6.0 mg/L
Weekly
Composite
E
Total Nitrogen (NO2+ NO3 + TKN)
(November 1- March 31)
.
Weekly
Composite
E
Total Phosphorus -
1.0 mg/L
Weekly
Composite
E
Color6
Monthly
Grab
U, D
Color6
Monthly
Composite
E
Chronic Toxicity
Quarterly
Composite
E
Cyanide
12.2 pg/L
22 pg/L
Weekly
Grab ,
E
Total Mercury9
0.03 pg/L
Weekly
Grab
E
Total Nickel10
214 pg/L
261 pg/L
Weekly .
Composite
E
Total Nickel
2/Month
Composite
E
Total Copper
2/month
Composite
E
Total Zinc
2/month
Composite
E
Total Silver
2/month
Composite
E
pH
Between 6.0 and 9.0 s.u.
Daily
Grab
E
Annual Pollutant Scann
Annual
Composite
E
Notes:
1.
U= Upstream at NCSR 1108. D= Downstream at a) NCSR 2424 and b) NCSR 564. Instrearn monitoring shall be grab
samples taken 3/week (June -September) and 1/week (October -May).
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
4. Instream fecal coliform monitoring is required 3/week during summer months only (June -September). Downstream
samples need only be taken at NCSR 2424.
5. Compliance with the limit for Total Residual Chlorine shall be based upon a daily average value.
6. As a Tier 1 Facility, Crowders Creek WWTP must monitor for color at upstream and downstream monitoring stations
on a monthly basis, from April to October. In addition, monthly color samples of the effluent must be taken year-
round (see A. (3) for more information and other effluent color requirements).
7. Chronic Toxicity (Ceriodaphnia), P/F at 41% with testing in March, June, September and December (see A. (2)).
8. The detection limit for cyanide is 10.0 pg/L. If the measured levels of cyanide are below the detection limit, then the
measurement is considered to be zero for purposes of compliance evaluation and should be reported on the DMR as <
10.0 pg/L.
9. EPA Method 1631 shall be used in all mercury analyses.
10. The nickel limit shall take effect October 1, 2007.
11. See special condition A (4).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

-l.
Permit NC007.4268
J
A. (2) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 41%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or,
"North Carolina Phase ll Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of March, June, September, and December. Effluent
sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THY3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month..
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.

Permit NC0074268
A. (3) COLOR PERMITTING REQUIREMENTS FOR TIER 3 FACILITY
Crowders Creek WWTP has been classified as a Tier 1 color discharger in accordance with North Carolina's Color
Permitting Strategy. The Permittee will conduct color monitoring of instream stations (upstream, downstream) on
a monthly basis during summer season (April -October). The Permittee will record whether a color plume was
observed around the outfall pipe during the monthly instream sampling events, and include that information on
the monthly discharge monitoring report. Effluent samples will be collected monthly for color on a year-round
basis. Color samples will be analyzed for ADMI color at natural pH. Effluent samples will consist of 24-hour
composites, while instream samples will be collected as grabs. Samples will be analyzed by a state certified
laboratory.:
If data show that water quality standards for color are being violated by the discharge permitted by the terms of
this permit, then the Director may reopen this permit for the purpose of imposing additional requirements
pursuant to 15A NCAC 2H.0114. Alternatively, if future conditions change and color isno longer a component of
the influent wastestream, then the perrnittee may request a permit modification to remove color permit
requirements.

Permit NC0074268 .�
A. (4) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in.
accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer,
winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as
"total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive as
provided by the appropriate analytical procedure.
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen.
Nitrate/Nitrite
Total Kjeldahl nitrogen
Oil and grease
Total Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane 1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene •
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene'
1,1,1-trichloroethane •
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable comvounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene •
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
.Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether'
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether.
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chryserie
Di-n-butyl phthalate
Di-n-octyl phthalate •
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene.
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director,
within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address:
Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

•
NCDENR/ DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Gastonia/ Crowders Creek WWTP
NC0074268
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(1.) Facility Name: Crowders Creek WWTP
(2.) Permitted Flow MGD): ( 6.0 MGD
! (6.) County: Gaston
(3.) Facility Class: j IV
; (7.) Regional Office: Mooresville _,__
4. Pretreatment Program: Full
(5.) Permit Status: Existing
1 (8.) USGS Topo Quad: C14NW
(9) USGS Quad Name:
.�
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KlaclV�Otl Vt7 �,a.@��. a s B`§`Y�X?.rty .,.kt
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(1.) Receiving Stream: I Crowders Creek
i (7.) Drainage Area (mi2): j 70.4
(2.) Sub -basin: ! 03-08-37
(8.) Summer 7Q10 (cfs): 13.3
(3.) Stream Index Number: j
(9.) Winter 7Q10 (cfs): 20
(4.) Stream Classification: C
i (10.) 30Q2 (cfs): ' 28
(5.) 303(d) Status: Yes; fecal coliform
j (11.) Average Flow (cfs): j 82
(6.) 305(b) Status:
' (12.) IWC %: 42
1.0 Proposed Changes Incorporated Into Permit Renewal
➢ The facility will receive a delayed limit of 214 µg/L for nickel.
➢ Add APAM
> Add weekly average ammonia limits
2.0 Summary
Crowders Creek WWTP is one of two wastewater treatment plants operated by the City of
Gastonia. The plant has a permitted flow of 6.0 MGD. The facility serves the southwestern
portion of the City of Gastonia and accepts domestic wastewater from Bessemeer City, Clover,
SC, and the western portion of the City of Kings Mountain. In addition the town also accepts
waste from 8 SIUs and has a full LTMP which they will be required to continue implementing.
Crowders Creek is listed on the 2003 Impaired Waters list for fecal coliform. Potential sources are
listed as urban runoff, industrial point sources and storm sewers.
3.0 Compliance Summary
DMR Data Review
DMRs were reviewed for the period of January 2002- October 2005. Monthly average data for
conventional parameters is summarized in the following table. The facility is currently averaging
flows at 45% of their capacity with maximum average monthly flows at 70% capacity.

NPDES Permit Fact Sheet - 12/27/05
Page 2
Crowders Creek WWTP
NC0074268
Flow n,
(MGD)
Tempi
(deg C)
TRC
(ug/L) .
BOD'
(mg/L)
NIi3-N
,.,,;(mg/L) .:.(
,,TSS
(mg/L).
Fecal
(##/100mL)
D O "°
.. (mg/I)
TN
(mg/L).
TP
(mg/L)
�.
Conductivity.'
656.77
Avg
2.72
18.95
<20
2.06
0.58
3.21
#DIV/0!
8.99
6.69
0.40
Max
4.20
27.66
<20
6.14
9.24
12.35
0.00
11.23
13.95
0.97
1678.08
Min
1.86
9.89
<20
0.30
0.03 -
0.00
0.00
7.36
2.24
0.10
473.07
Limit
6.0
-
28
13
2 (s) ,10 (w)
30.0
200
> 6.0
6.0 (s)
1.0
-
Instream data was reviewed for the years 2004 and 2005. A summary of monthly average data is
included in the following table. Temperature, fecal coliform and color appear slightly higher
downstream, however that may be due to stream features. The discharge appears to eb havig
minimal impact on the receiving steram.
Upstream
Downstream A
Downstream B
TEMP
(°C)
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
TEMP
(°C) '
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
TEMP
(°C)
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
Avg
14.6
9.4
180.1
265.8
24.0
15.0
9.2
. 173.6
387.4
26.6
15.1
9.3 .
182.5
#DIV/0!
29.7
Max
23.1
12.6
316.5
418.0
49.8
23.5
12.5
247.4
734.0
54.0
23.8
12.6
343.8
0.0
54.3
Min
4.0
7.5
130.3
178.0
11.9
4.4
7.3
125.6
186.0
11.8
4.4
7.5
130.0
0.0
15.5
RPA Analysis
RPAs were performed for the permitted parameters cyanide, mercury, copper, zinc, silver, and
toluene. Maximum predicted concentrations for all pollutants except toluene were higher than
the allowable concentrations. Silver, zinc and copper are action level parameters, however,
therefore 2/month monitoring will continue as is in the current permit. Limits for cyanide and
mercury will also be retained. Toluene monitoring, however, will be removed from the permit.
RPAs were also performed for the following parameters based on data collected as part of the
LTMP: arsenic, cadmium, chromium, lead, molybdenum, nickel, and selenium. With the
exception of nickel, maximum predicted concentrations for all parameters were well below the
allowable concentrations. The facility will receive a delayed limit of 214 µg/L for nickel. -
The facility performed 3 priority pollutant analyses as part of the renewal application
requirements. The analyses reported one out of three hits for both'chloroform (5.0 µg/L) and
chlorodibromomethane (5.3 µg/L) however EPA criteria for these pollutants are far above these
values at 902 µg/L and 2150 µg/L, repectively. There were two hits for bis(2-
ethylhexyl)phthalate of 16 µg/L and 23 µg/L, however neither NC nor EPA have water quality
criteria for this pollutant. ECOTOX gives a recommended criterion of 370 µg/L. Based on this
information, none of these parameters appear to be pollutants of concern.
WET Test Results
The facility has a chronic wet test requirement at 41% effluent concentration. The WWTP has
passed 19/19 test administered since March 2001.
Compliance History

• NPDES Permit Fact Sheet — 12/27/05
Page 3 NC0074268
The Crowders Creek WWTP had one fecal coliform weekly average violation, one mercury
weekly average violation, three monthly average TN violations, and one pH minimum value
violation over the course of the permit cycle. The fecal coliform violation and pH violation
resulted in enforcement cases. No action was taken on the TN violations since the facility was
under an SOC at the time. Due to operational difficulties prior to 2002, the facility had high
nitrogen levels and was unable to meet its summer nitrogen limit effective in 2001. Since 2002,
however, improvements have been made and there have not been any TN violations. The facility
has not had any permit violations since August 2003 and appears to be well operated and
maintained.
•
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: August 31, 2005
Permit Scheduled to Issue: November 1, 2005
5.0 State Contact Information
Crowders Creek WWTP
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature Date
Regional Office Comments:
i v,
Regional Reco = dation by:
Signatur
Date 6./,Ol4' _
Reviewed and accepted by:
Regional Supervisor:
Signature L- : ✓'
Date `Z l v1 6,

NPDES Permit Fact Sheet— 12/27/05
Page 4
Crowders Creek WWTP
NC0074268
NPDES Unit Supervisor:
Signature Date

x
A UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
� >W REGION 4
o�Q ATLANTA FEDERAL CENTER
Z.«•61 FORSYTH
ir44 PROS-GO2 ATLANTA, GEORGIAT 0REET 303-8960
5 2006
JAN 2 6 2006'
Ms. LeToya Fields
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
Crowders Creek WWTP
Permit No. NC0074268
Dear Ms. Fields:
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 it are received. Otherwise, please send us one copy of the final
permit when issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
F E S - l 2006
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

Re: comments on Crowders Creek WWTP - NC0074268
Subject: Re: comments on Crowders Creek WWTP - NC0074268
From: Toya Fields <[e-mail]>
Date: Wed, 25 Jan 2006 11:44:13 -0500
To: [e-mail]
Ok, I can make all these changes. Thanks for your help.
Toya
[e-mail] wrote:
In Part A.1:
4/!:I1. for the two color parameters, there should not be a footnote 7 in
the measurement frequency column.
6( 2. a,11 metals should be expressed as total.
. shouldn't Hg monitoring be via grab sample, since Method 1631 is
being required?
4. in the opening table in the fact sheet, the IWC should be 41%.
Toya Fields - toya.fields@nmai],..net
Environmental Engineer I
Western NPDES Program
Division of Water Quality
Tel: [phone] x 551
Fax: [phone]
Toya Fields <[e-mail]>
Environmental Engineer I
Western NPDES Program
Division of Water Quality
1 of 1 3/14/2006 1:48 PM

a5tonia
P.O. BOX 1748
aotonia, , ortfj Carolina 28053-1748
WASTEWATER TREATMENT DIVISION
January 17, 2006
Ms. LeToya Fields
Western NPDES Program
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Draft NPDES Permit
NC0074268 Crowders Creek WWTP
Dear Ms. Fields:
lit
H3Nd2ie 338110S 1NIOd
AII1Vf10 831VM - 8N30
900ZZ 330
_R.Aaaaa
Thank you for sending us the draft of Crowders Creek WWTP's renewed NPDES permit.
We have reviewed this draft, and in accordance with your request, we are submitting the
following comments, both of which relate to the Effluent Limitation and Monitoring
Requirements chart in Section A(1):
• olor: The measurement frequency for color is monthly which has a footnote of "7".
(e believe the correct footnote number should be "6".
• Memory: The sample type for mercury is listed as a "Composite". Proper technique
e required 1631 mercury method and an August 12, 2003 letter from DWQ titled
PDES Mercury Requirement — EPA Method 1631", dictate that grab samples be used
for this method. We request that the sample type be changed to "Grab".
We appreciate your work on this very thorough permit and have no other comments on
the draft at this time. If I can be of any assistance please feel free to call me at
704-866-6991 or e-mail at [e-mail].
Sincerely,
CITY OF GASTONIA
Larry W. Cummings
Division Manager — Wastewater Treatment
cc: D. Rex Gleason, P.E. - DWQ — Mooresville Regional Office
Matthew Jordan, P.E. - Director of Public Works & Utilities - Gastonia
David Shellenbarger — Assistant Division Manager WWT — Gastonia
David Morgan - Senior Plant Operator/ORC Crowders WWTP — Gastonia
CERTIFIED MAIL: 7005-0390-0003-4042-5949
A A
An on a..wy Assessors
ISO 14001 Certified
Pure andClean for our Dekka and Streams

Draft Permit Review
Subject: Draft Permit Review
From: John Giorgino <[e-mail]>
Date: Tue, 14 Feb 2006 10:19:53 -0500
To: Toya Fields <[e-mail]>
Hi Toya, I have reviewed NC0074268 - Crowders Creek WWTP, and have no comments.
Thanks for forwarding it.
-John
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: [e-mail]
Web Page: http://www.esb.enr.state.nc.us
1 of 1 3/14/2006 2:45 PM

PUBLIC; NOTI
STATE OF NORT,
,CARQL INA -' , v
ENVIRONMENTAL ,,MAN-
AGEMENT COMMISSION/"x':
NPDES "UNIT a'...
1617 �� MAIL , :SSRVICEr;`
CENTER
•RALEIGH 1 C 27699 161
NOTIFICATION_';
TENT' t TO s ISSUE A^
NPDES' f, WASTEWATER f'
PERMITz
On the basis,of thorough;•
staff review and';application j
of ;f NG Geriefal Statute;',
143.21; Public„law 92-500'4
and',other lawful':'.standards';?•
and 'regulations `tithe North:'
Cajolirta, Environmental,z:
management Commission
proposes to:issue a nation=„
al x Pollutant Discharge ;
mmations `System Gastonia, NC
Eh
(NP,,,DES) wastewaterdis a,
Charge; permit". to {the per Gaston County
sons(s); listed''below effec-
tnre 45 "days from the pub-=.
hsh date of this not ce I, Melissa Birchfield Legal Advertising Manager of the The Gaston Gazette, do
,.
Written pomments regard, ethat the advertisement of
ing theproposed,permd will!
beaccpted until 3o days •PUBLIC NOTICE —NOTIFICATION OF INTENT TO
after the publishdate ofthis-
notice All comments re ; ISSUE A NPDES WASTEWATER PERMIT
ceroed;pnor to°that date are 0
considered in tha?final de "
termiriations�;fegarding the
proposed ,permit.3 The Di"
rector,of the -Ng:Ertl/102ft of,'r
Water •Quality may; decide i;
to hold a public meeting far t
the)proposed pei•rrnt should:,#Measuring 10.35 inches appeared in The Gaston Gazette, newspaper published in Gaston
thelDnnsion reQeive)a sig
nrficant degree of public m ACounty, Gastonia, NC, in issues
terest ,fr�
Copies of draft per,
and other supporvng mfmorlt;1 'DECEMBER 31, 2005
the
mationon,fileused tokde.`.
terming conditions present
m the?draft permit are avail -
able upc n requesLand pay
merit of the obit's of repro- <i
diction `Mail ;comments.;
and/or'.;, requests.„ for infor?_,`lr
matioh to • the NC Division' u,
of .Water Quality at the'!
above ;address ;br d411Sth'e l
Point °Source Branch at
(919� �733 5083 =?extension'
520.Please ;include trthe;
NPDEs f permit ` num r;'1'Sworn to and subscribed before me this
(N00074268) many coin- ��
murncatwn Interested per S.;
sons may also Alti,f=the Di=
vision of Water Qbahty at }�
512,-h1 Salisbury tstreet '
Raleigh NC`276044148't
between the `hours
a m and 5 00 1 p m to re 1
view nformatioiton file
The Town of 'Gastonia"
(PO $ox;1748 kGastopia
N C.?8053) has applied fob
renewal of, NPDES5 permit]
NC00774268 forthe Crowd;,.
ers:Creek WWTP1,in,Gas�„
toV_Dounty Thisipermtteda
faciiitydischarges 6 0 MGD:;
treated -, wastewater $to
Crowders Creektin the Ca ,':
cawsa','River Basin Cur
rently:BOP ammonia ndra,
gen total residual chlonn0
total r1;nitrogen; cyanides
mercury and4ckle re,
water,„'ality limited This;r
discharquge may'affect`future,
allocation Iri. this: portion of:.
the"Catawba Rnrer Basin 1.
` 3.4: f ' f
\1C-December 3`1, 206eT
AFFIDAVIT OF INSERTION OF
ADVERTISEMENT
The Gaston Gazette
elissa Birchfield
Legal Advertising
day ofl�����t,[
&fa__ %rzta)
certify
, 2006
Carla Norris Potter, Notary Public
My Commission Expires September 14, 2008

NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Gastonia/ Crowders Creek WWTP
NC0074268
Facility reformation , ,� e,9 h �1,ff
(1.) Facility Name: Crowders Creek WWTP
(2.) Permitted Flow MGD): 6.0 MGD 6. County: Gaston
(3.) Facility Class: _.__.....__..__.__..._.__` IV —____........._..—._(7.) Regional Office: Mooresville -
(4.) Pretreatment Program: Full (8.) USGS Topo Quad:........._....__C14NW _.._....__._... — _
(5.) Permit Status: Existing (9.) USGS Quad Name:
Stream Characteristics
# _
(1.) Receiving Stream: Crowders Creek— (7.) Drainage Area (mi2): 70.4
— — f _
(2.) Sub -basin: 03-08-37 8 Summer 7Q10 (cfs): 13.3
(3.) Stream Index Number: - • (9.) Winter 7Q10 (cfs): 20
(4.) Stream Classification: ' C (10.) 30Q2 (cfs): 28
(5.) 303(d) Status: Yes; fecal coliform (11.) Average Flow (cfs): _ 82 _.. _._.._.__..:._--...__.._.._
(6.) 305(b) Status: (12.) IWC %: 42
1.0 Proposed Changes Incorporated Into Permit Renewal
➢ The facility will receive a delayed limit of 214 tg/L for nickel.
➢ Add APAM
➢ Add weekly average ammonia limits
2.0 Summary
Crowders Creek WWTP is one of two wastewater treatment plants operated by the City of
Gastonia. The plant has a permitted flow of 6.0 MGD. The facility serves the southwestern
portion of the City of Gastonia and accepts domestic wastewater from Bessemeer City, Clover,,
SC, and the western portion of the City of Kings Mountain. In addition the town also accepts
waste from 8 SIUs and has a full LTMP which they will be required to continue implementing.
Crowders Creek is listed on the 2003 Impaired Waters list for fecal coliform. Potential sources are
listed as urban runoff, industrial point sources and storm sewers.
3.0 Compliance Summary
DMR Data Review
DMRs were reviewed for the period of January 2002- October 2005. Monthly average data for
conventional parameters is summarized in the following table. The facility is currently averaging
flows at 45% of their capacity with maximum average monthly flows at 70% capacity.

NPDES Permit Fact Sheet- 12/27/05
Page 2
Crowders Creek WWTP
NC0074268
Flow °
(MGD)
Temp.
(deg C)
TRC
(ug/L)
BOD
(mg/L)
NH3-N-`,
(mg/L),'
TSS
`(mg/L)
Fecal
(#/100 mL)
D.O.
(mg/L)'
8.99
= TN
(mg/L.),
6.69
'TP
(mg/L)
0.40
- Conductivity
656.77
Avg
2.72
18.95
<20
2.06
0.58
3.21
#DIV/0!
Max
4.20
27.66
<20
6.14
9.24
12.35
0.00
11.23
13.95
0.97
1678.08
Min
1.86
9.89
<20
0.30
0.03
0.00
0.00
7.36
2.24
0.10
473.07
Limit
6.0
-
28
13
2 (s) ,10 (w)
30.0
200
> 6.0
6.0 (s)
1.0
-
Instream data was reviewed for the years 2004 and 2005. A summary of monthly average data is
included in the following table. Temperature, fecal coliform and color appear slightly higher
downstream, however that may be due to stream features. The discharge appears to eb havig
minimal impact on the receiving steram.
Upstream
Downstream A
Downstream B
TEMP
(°C)
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
TEMP
(°C)
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
TEMP
(°C)
DO
(mg/L)
Conductivity
(umhos/cm)
Fecal
Color
Avg
14.6
9.4
180.1
265.8
24.0
15.0
9.2
173.6
387.4
26.6
15.1
9.3
182.5
#DIV/0!
29.7
Max
23.1
12.6
316.5
418.0
49.8
23.5
12.5
247.4
734.0
54.0
23.8
12.6
343.8
0.0
54.3
Min
4.0
7.5
130.3
178.0
11.9
4.4
7.3
125.6
186.0
11.8
4.4
7.5
130.0
0.0
15.5
RPA Analysis
RPAs were performed for the permitted parameters cyanide, mercury, copper, zinc, silver, and
toluene. Maximum predicted concentrations for all pollutants except toluene were higher than
the allowable concentrations. Silver, zinc and copper are action level parameters, however,
therefore 2/month monitoring will continue as is in the current permit. Limits for cyanide and
mercury will also be retained. Toluene monitoring, however, will be removed from the permit.
RPAs were also performed for the following parameters based on data collected as part of the
LTMP: arsenic, cadmium, chromium, lead, molybdenum, nickel, and selenium. With the
exception of nickel, maximum predicted concentrations for all parameters were well below the
allowable concentrations. The facility will receive a delayed limit of 214 µg/L for nickel.
The facility performed 3 priority pollutant analyses as part of the renewal application
requirements. The analyses reported one out of three hits for both chloroform (5.0 µg/L) and
chlorodibromomethane (5.3 µg/L) however EPA criteria for these pollutants are far above these
values at 902 µg/L and 2150 µg/L, repectively. There were two hits for bis(2-
ethylhexyl)phthalate of 16 µg/L and 23 µg/L, however neither NC nor EPA have water quality
criteria for this pollutant. ECOTOX gives a recommended, criterion of 370 µg/L. Based on this
information, none of these parameters appear to be pollutants of concern.
WET Test Results
The facility has a chronic wet test requirement at 41% effluent concentration. The WWTP has:
passed 19/19 test administered since March 2001.
Compliance History

NPDES Permit Fact Sheet — 12/27/05 Crowders Creek WWTP
Page 3 NC0074268
The Crowders Creek WWTP had one fecal coliform weekly average violation, one mercury
weekly average violation, three monthly average TN violations, and one pH minimum value
violation over the course of the permit cycle. The fecal coliform violation and pH violation
resulted in enforcement cases. No action was taken on the TN violations since the facility was
under an SOC at the time. Due to operational difficulties prior to 2002, the facility had high
nitrogen levels and was unable to meet its summer nitrogen limit effective in 2001. Since 2002,
however, improvements have been made and there have not been any TN violations. The facility
has not had any permit violations since August 2003 and appears to be well operated and
maintained.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: August 31, 2005
Permit Scheduled to Issue: November 1, 2005
5.0 State Contact Information
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature Date
Regional Office Comments:
Regional Recommendation by:
Signature Date
Reviewed and accepted by:
Regional Supervisor:
Signature
Date

NPDES Permit Fact Sheet — 12/27/05
Page 4 '
Crowders Creek WWTP
NC0074268
NPDES Unit Supervisor:
Signature Date

To (k ac/O
NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request 12/16/2005
Facility
City of Gastonia- Crowders Creek
Permit #
NC0074268
Region
Mooresville
Requestor
Toya Fields
Pretreatment A-F Towns- Dana Folley (ext. 523)
Contact G-M Towns- Jon Risgaard (ext. 580)
N-Z Towns- Deborah Gore (ext. 593)
COMMENTS TO PRETREATMENT UNIT:
PRETREATMENT UNIT COMPLETES THIS PART:
Status of Pretreatment Program (circle all that apply)
1) the facility has no SIU's and does have a Division approved Pretreatment Program that is INACTIVE
2) the facility has no SIU's and does not have a Division approved Pretreatment Program e
131`the facifity has ( +s-deveioprrtgj a Pretreatment Pro ram
3a) is Full Program with LTMP,, - or 3b) is Modified Program with STMP +,F
4) the facility MUST develop a Pretreatment Program - Full Modified
5) additional conditions regarding Pretreatment attache(deor listed below cy(S`
��1)
Flow Permitted MGD Actual MGD ()31-d 7
5 C"
STMP time frame:
most recent
Industrial a, Co,..S (,
Domestic o . CSA
next cycle
I
(S)
T
MP
Pollutant
Check List
POC due to
NPDES/Non-
Discharge
Permit Limit
Required
by EPA`
Required by
503 Sludge**
POC due to SIU""
Site specific POC (Provide Explanation)""
STMP
Frequency
effluent
at
LTMP
Frequercy
efflue0f
at
_.
B
BOD
✓
,/TSS
✓
4
Q M
V
NH3
V
4
Q M
A
Arsenic
✓
4 1
Q M
i
Cadmium
J
V
L
4
Q M
J
Chromium
4
L
4
k Q M
4
Copper
'1
v
L
4
Q M
'/r
Cyanide
V
j.
4
( Q M
4
Lead
4
V
—
4
! Q M
V
Mercury
V
v'
L
4
Q M
V
Molybdenum
V
4
. Q M
4
Nickel '
4
J
L_
4
Q M
tf
Silver
L_
4
Q M
/
Selenium
'✓
4
6 Q M
4Zinc
4
1—
4
t Q M
VI:
n YlDG o c,,
\/
4
I Q M
'
,/T
r
191-165`'
V
L
4
Q M
4
or5 ,.,•c IV
L
4
Q M
I
a ar'IA.Fs
4
1 Q
J
+011(Pn r2.
4
Q
V
(.O )
4
Q /
*Always in the LTMP
"Only in the LTMP if the POTW land applies sludge
***Only in LTMP while the SIU is connected to the POTW
" is a specific concern to the POTW (ex -Chlorides for a POTW who accepts Textile waste)
— Only in LTMP when the
all LTMP/STMP effluent data
on DMRS?/
Yes t ^---. 4444°
pollutant
Q= Quarterly
No (attach data)
M=Monthly
Comments:
available in spreadsheet?
Yes No
f
_ _
/
�f
version 10/8/03
NPDES Pretreatment.request.form.031008
Revised: August 4, 2000

REASONABLE POTENTIAL ANALYSIS
Crowders Creek WWTP
NC0074268
Time Period 2002-2005
Qw (MGD) 6
7Q10S (cfs) 13.3
7QIOW (cfs) 20
30Q2 (cfs) 28
Avg. Stream Flaw, QA (cfs) 82
Rec'ving Stream Crowders Creek
,WWTPClass IV
IWC (%) C4 7Q10$ 41.15
7Q10W 31.741
30Q2 24.933
QA 10.186
Stream, Class 'C
Outfall 001
Qw.=6MGD.
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
NC WQS/ 'h FAV/
Chronic Acute
POL
Units
REASONABLE POTENTIAL RESULTS
n A Dot Max Prod Cw Allowable Cw
RECOMMENDED ACTION
Arsenic
Cadmium
Chromium
Copper
NC
NC
NC
NC
, 50
2.0 15
50 1022
7 AL 7
ug/L
ug/L
ug/L
ug/L
24 1
24 0
24 1
82 81
3.5
1.2
4.3
40.5
Acute: N/A
Chronic: 122
Acute: 15
Chronic: 5
Acute: 1,022
Chronic: 122
Acute: 7
Chronic:. 17
Monitored as part of
Maximu'ni predicted > allowable Action level paramete
Cyanide
Lead
Mercury
Molybdenum
Nickel
NC
'NC
NC
A
NC
5 N 22
25 N 33.8
12.
3500
88 261
10
ug/L
ug/L
ng/L
ug/L
ug/L
198 16
24 0
114 76
22 22
24 24
25.1
1.0
42.8
80.3
394.3700
Acute: 22
Chronic: 12
Acute: 34
Chronic: 61
Acute: N/A
Chronic: 29
Acute: N/A
Chronic: 14,038
Acute: 261
Chronic: 214
/ Toluene
NC
11
ug/L
26 0
0.5
Acute: N/A
Chronic: 27
MaXpredicted > atlowabt
Retain limit.',;
Max predicted > alIOW
Retain limit
Max prediotel > allowable
Delayed iimit77 ,,
Ne detections
Remove monitoring requiremt
Selenium
Silver
Zinc
NC
NC
NC
5 56
0 AL 1.23
50.0 AL 67
ug/L
ug/L
ug/L
24 0
82 0
82 82
1.0
1.0
168.8
0 0
0 0
N/A
N/A
Acute: . 56
Chronic: 12
Acute:
Chronic: 0
Acute: 67
Chronic:- 122
Acute: N/A
Chronic: Error @ Typ
MOmtored asrpert of LTMP.;.
Max predicted > alloweple
Actioo'ledel:parameter::;Pelein monitoring
Max predicted allowable Action level parameter
Retain=monitoring ., "�
Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
Freshwater Discharge
74268_rpa.xls, rpa
12/27/2005

REASONABLE POTENTIAL ANALYSIS
Arsenic
Cadmium
Date Data BDL=1/2DL Results
1 Oct 2005 . 7 n 1.0 CM lieu 0.2858
2' Sep-2005 <? 2.0: 1.0 Mean 1.0583
3' Aug-2005, 2,01.0 C.V. 0.2700
4: ' Jul-2005 < i 2.0: 1.0 n 24
5, Jun-2005 <9 2.0; 1.0
6 May-2005 < 2.0 1.0 Mult Factor = 1.4500
7; Apr-2005 <: 2.0 1.0 Max. Value 2.4 ug/L
8; Mar-2005 < 2.0` 1.0 Max. Pred Cw 3.5 ug/L
9, Feb-2005 <. 2.0. 1.0
10 Jan-2005 a < 2.0' 1.0
11 ' Dec-2004 < 2.0 1.0
123 2.01 1.0
13 Nov-2004 4 2.0 1.0
14 Oct-2004 t <1 2.0 1.0
15 Sep-2004 < 2.0' 1.0
16 Aug-2004 9 < 2.0'= 1.0
17 Jul-2004 /<} 2.0' 1.0
18 Jun-2004 f ' 2.4, 2.4
19 May-2004'}� a 2:0; 1.0
20: `:Apr-2004 <° 2.0 1.0
21 Mar-2004 < 2.01.0
22; <€ 2.0 1.0
23: Feb-2004 (c 2.0. 1.0
24,• Jan-2004" < " 2.0' 1.0
25' -
26:
27
28
291
30,
31
32--
33','.
34'
35'_
36;
37
38
391
40;
41
42'
43'`
441
45;
46 is
47
48;
49'
50`
51;
52.'
53':
54;
55'
56,
57
58'
59',
60!
61:
62:
63
64;,
65f,
67
68
69
70,`
Date
1, Oct-2005.
2 Sep-2005
3; ,Aug-2005
4' JuI-2005
5i. Jun-2005
61 May-2005
7, Apr-2005'
8 ; ' Mar-2005
9 Feb-2005
10: Jan-2005
11: Dec-2005
12,
13 Nov-2004
14, Oct-2004
15 Sep-2004
16' Aug-2004
171 JuI-2004
18' Jun-2004
19;, May-2004
20:. Apr-2004
21 Mar-2004
221•
23 Feb-2004
24: Jan-2004
25:
261
27 i
28=
29
}
30:
31 ,
32
33;
34,
35,:
36
37`
38!
39`,
40
41 :":
42=`'
43,
44!_
45;
46 i
471
48
49: "•
50;
51
53
54
55,
56 s`
57'
58 ;3
59
60.
61;
62,..
63
64! ,,
65:
66:
67I'
68
69re'•
70''
Data
BDL=1/2DL Results
2, 1.0 Std Dev. 0.1412
2 1.0 Mean 0.9583
2' 1.0 C.V. 0.1473
• 2 1.0 n 24
2 1.0
2 1.0 Mult Factor = 1.2300
2: 1.0 Max. Value 1.0 ug/L
2 1.0 Max. Pred Cw 1.2 ug/L
2 1.0
2 1.0
2 • 1.0
1 0.5
2 1.0
2 1.0
1.0
2 1.0
2 : 1.0
2;
•2 0
1�
. 2
1.0
1.0
1.0
1.0
0.5
1.0
1.0
-1 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
71
72.
73.
74
75'.
76;
77;
78'
79; -
80
81
82
83,-
84;
85'.
86,
87'
88
89'
90'
91,
92
93'
94
95;
96`
97
98.i'
99, '
100.`
101
102
1031
104,
105"
106! 1 '
107!
108!'
109 '
110,
111,
1121
1131
114;
1151
116 '
117
118'
119, -
120
121;
122'.
123
124
125j-
126.
127;
128:
129'
130',
131;
132,
133:
134:
135
136=
1371
138;
1391
140;
141'
142;
143;
144;1
71
72
73
74
75'
76
77
78,
79'
80
81
82;
83:
84
85
86
87'
88
89'
90,
91'
92`
93.
94
95
96'
971
98
99'
100'
101
102'
103,
104
1051'
106
107;
108'
109,
110,
111
112:
113
114:
115;
1161
117'
1181
1191
120
121' '
122`
123;
124;
125`
126;
1271
128
129'
130;
131;
1321
133'
134;
135.
136,
137;
138' -
139;
140
141.
142,'
143
144`
74268_rpa.xls, data
2 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
145
146
147'
148'
149'
150'
1511
152
153
154
155:,
156'
157;
158
159
160'
161'
162E
163 `
164'
165!
166:
167 !
168".
169(
170: °
171'.
172
173
174;.
175;�
1764.
177r
178
179
180j
181':
182r�°
183 °_°
184
185
186
187�
188j0-,
189°
190
1911
192' ,
193;
194i
195E
196,
197
198
199,.`
200
145:
146'
147:
148-
149,
150 -
151,
152
153
154'
155
156
157;
158,
160,
1611
162
163, ° .
164
165
166
167."
168
169
170;
171
172; °
173i
174
175
176➢
177
1781
1791
180
181;
182'
183
184'
185
186°.
187j
188i
189
190
191:
192'
193,'
194:
195:
196', °
197
198 ,
199'
200:
74268_rpa.xls, data
12/27/2005

r
REASONABLE POTENTIAL ANALYSIS
Chromium
Copper
Date
1 • Oct-2005
2 .Sep-2005
3 Aug-2005
4 Jul-2005
5' Jun-2005
6 May-2005
7 Apr-2005
8 ` Mar-2005
9 Feb-2005
10 Jan-2005
11 Dec-2004
12•
13 Nov-2004
14 . Oct-2004
15 Sep-2004
16. Aug-2004
17 Jul-2004'
18 Jun-2004
19- May-2004
20; Apr-2004
21 Mar-2004
22
23 Feb-2004
24. Jan-2004
25.
26:
27
28
29
30
31:
32:
33,
34
35::
36,
37
38!'
39
40
41,
42'.
43,
44
45.,
463
47,
48'
49
50,
51'
52;'
53'
54:
55
56
57,
58,,
59,
60'
61;
62
63,
64
65'
66
67,
68
69
70
Data
2
2`
2'
t•<k 2'
<4 2`
< 2
2
2
<1 2
< 2
3•
2
2
2'
2,
2
2
BDL=1/2DL Results
1.0 Std Dev. 0.3770
1.0 Mean 1.1042
1.0 C.V. 0.3415
1.0 n 24
1.0
1.0 Mult Factor = 1.5900
1.0 Max. Value 2.7 ug/L
1.0 Max. Pred Cw 4.3 ug/L
1.00
1.00
1.00
2.70
1.00
1.00
1.00
1.00
1.00
1.00
1.00
2 1.00
2.0 : 1.00
2 1.00
2 ; 1.00
4 1.80
Date
1 03/15/02
2 07/30/02
3 07/31/02
4 08/27/02
5 08/28/02
6 09/26/02
7 09/27/02
8 10/29/02
9 10/30/02
10 11/26/02
11 11/27/02
12 12/16/02
13 12/23/02
14 01/15/03
15. 01/20/03
16 02/25/03
17 02/26/03
18 03/27/03
19 03/28/03
20 04/29/03
21 04/30/03
22 05/09/03
23 05/12/03
24 06/26/03
25 06/27/03
26 07/01/03
27 07/04/03 Q T
28 08/26/03'
29 08/27/03
30 09/03/03
31 09/12/03
32 10/28/03
33 10/29/03
34 11/27/03 '`-
35 11 /28/03
36 12/10/03
37 12/19/03
38 01/08/04''
39 01/19/04
40 02/24/04
41 02/25/04
42 03/26/04
43 03/29/04 b,
44 03/30/04
45 04/01 /04
46 04/09/04
47 05/28/04 , E
48 05/31 /04 1.F`
49 06/25/04
50 06/28/04
51 07/01/04
52 07/09/04
53 08/26/04
54 08/27/04 n ;�
55 09/06/04
56 09/30/04
57 10/27/04 '.
58 10/28/04
59 11/01/04
60 11/08/04 •m'
61 12/23/04
62 12/24/04
63 01/05/05
64 01/17/05
65 02/23/05 tr
66 02/24/05
67 03/30/05
68 03/31/05
69 04/28/05
70 04/29/05
Data BDL=1/2DL
Results
12 12.0 Std Dev. 4.6426
7.7 7.7 Mean 6.7561
12.6 12.6 C.V. 0.6872
9.8 9.8 n 82
12.8 12.8
6 6.0 Mult Factor = 1.5700
6.4 6.4 Max. Value 25.8 ug/L
9.7 9.7 Max. Pred Cw 40.5 ug/L
4 4.0
5.5 5.5
9.5 9.5
14 14.0
5.2 5.2
6.7 6.7
13.7 13.7
7 7.0
11.9 11.9
16.9 16.9
6.4 6.4
8.6 8.6
8.2 8.2
10.3 10.3
6.3 6.3
5.8 5.8
5.3 5.3
3.4 3.4
5.8 5.8
3.8 3.8
6.4 6.4
5.6 5.6
3.2 3.2
3.2 3.2
3.8 3.8
6.2 6.2
14 14.0
8.6 8.6
25.8 25.8
16.6 16.6
19.6 19.6
13.2 13.2
11.4 11.4
13.7 13.7
8 8.0
7.4 7.4
9.4 9.4
5.8 5.8
5.5 5.5
4.5 4.5
4.2 4.2
2.9 2.9
6.2 6.2
4.7 4.7
6.5. 6.5
5.2 5.2
3.6 3.6
2.3 2.3
3 3.0
3.4 3.4
2.5 2.5
2.6 2.6
2.2 2.2
15.2 15.2
2.2 2.2
2.1 2.1
2.4 2.4
2.8 2.8
3.8 3.8
2.8 2.8
2 2.0
4.4 4.4
4
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
71'
72'
73;
74;
75
76,
77 .
78'
79
80,
81
82:
83'
84
85
86
87'
88'
89
90;
91'
92
93'
94'
95'
96 !.
97,
981
99':,
100
101'
102;
103;.
104!
105,
106!
107,
108
109'•
110:`.
111
112!
113'
114:
115'
116:
117!
118!
119;.
120;'
121;
122;
123!
124•
1251
126:
127'.
128'
129;
130
131,
132
133.
134,
135;
136
137!
138!.
139„
140.
141'
142.
143j•
144
71
72
73
74
75
76
77
78
79
80
81
82
83:
84'
85
86' .
87:
88
89
90'
91'
92!
93
94'
95!
96:
97;
98!
99;
100!
101
102'
1031:
104!
1051
106
107'
108!
109;
110i
111 !
112
113!
114!
115;
116'
117;
118!
119'
120i
121
122,-
123j
124;
125j
126j
127i
128;
129'
130:
131!
132
133'.
134',
1351
136'
137!
138
139
140;
141
142!
143'
144'
05/30/05 ` 2.4 2.4
05/31/05 z 2 1.0
06/27/05 4.4 4.4
06/28/05 ;"'` 4 4.0
07/01/05 3.2 3.2
07/05/05 3.8 3.8
08/29/05 4.4 4.4
08/30/05 3.8 3.8
09/01/05 3.6 3.6
09/09/05 2.8 2.8
10/26/05 ` ,, 3.2 3.2
10/27/05 3.2 3.2
-5-
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
145
146!
147'•
148•
149
150;
151.
152! .
153
154
155!
1561
157
158!
159'
160:
161'
162i
163i
1641
165;
166:
167;
168:
1691
1701
171;
172
173
174!
175
176; .
1771
178:
179;
180
1811
182:
,183!.
184'
185!
186
187;
1881
1891
190'
191'
192!
193'
194
195;
196
197,
198`,
199
2001
145;
146:
147'
148;
149
150}
151:
152;
153!
1541
155!
1561
157.
1581
159'
1601
161,
1621
163E
164
165
1661
167
168!
1691
170{1{
171)
1721
173
174
175
176
1771
178
179!
1801
181:
1821
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
-6-
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
Cyanide
Lead
Date Data
1 02/19/02
2 02/20/02
3 02/21/02
4 03/20/02i
5 03/21/02
6 03/22/02
7 03/25/02 <'
8 03/26/02
9 04/19/02 �(
10 04/22/02
11 04/23/02
12 04/24/02
13 05/24/02 a<'
14 05/27/02
15 05/28/02
16 05/29/02 >4
17 05/31/02
18 06/19/02 4
19 06/20/02
20 06/21/02
21 06/24/02
22 07/23/02
23 07/24/02
24 07/25/02
25 07/26/02
26 07/29/02
27 08/21/02 <;
28 08/22/02
29 08/23/02.
30 08/26/02
31 09/19/02 "
32 09/20/02
33 09/23/02
34 09/24/02
35 09/25/02 '<
36 10/23/02 <_
37 10/24/02 5�
38 10/25/02 _4
39 10/28/02
40 11/20/02
41 11/21/02
42 11/22/02
43 11/25/02
44 12/09/02
45 12/25/02
46 12/26/02-
47 12/27/02E;
48 01/01/03,,;z8,
49 01/03/03
50 01/28/03r<�
51 01/29/03
52 01/30/03
53 02/19/03
54 . 02/20/03
55 02/21/03
56 02/24/03
57 03/20/03
58 03/21/03
59 03/24/03
60 03/25/03 �.
61 03/26/03
62 04/22/03
63 04/23/03 <'
64 04/24/03 <i
65 04/28/03 4
66 05/02/03E,
67 05/26/03 ,c
68 05/27/03
69 05/28/03
70 '05/29/03
BDL=1/2DL Results
10 5.0 Std Dev. 1.4236
10 5.0 Mean 5.1540
10 5.0 C.V. 0.2762
10.3 10.3 n 198
23 23.0
10 5.0 MuIt Factor = 1.0900
10 5.0 Max. Value 23.0 ug/L
10 5.0 Max. Pred Cw 25.1 ug/L
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
12.2 12.2
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10. 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0'
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
'10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0`
10 5.0
Date
Oct-2005;
Sep-2005
3 `Aug ,2005_,
4 Jul-2005
5= Jun-2005
6 May-2005;`
7 Apr-2005
8f •Mar-2005'=
9 Feb-2005
10! Jan-2005
11' Dec-2004
12'
13 Nov-2004,
14 Oct-2004
15! ° Sep-2004
16' • `Aug-2004'
17 , Jul-2004-
18` Jun-2004
19 May-2004+_
20 ~; Apr-2004 }a
21' Mar-2004
221 . a
23,! Feb-2004`
24' Jan-2004
2
25t
26 4,
27!
28r
29
30 r' .,'
31 t,,
32
33 Ef,
34 E'
35 ,„!
36 !>•'
37(,
381
39
40! .,
41`
42jl
43;
44x'°_
45
46!
47'
48„,'
491.°
501
511'
52 t:"
541,..
55
56 #`.;'
57
58 t ''_
59t
60
61
62¢
63='=
64
65
66L'
67 {.
68_
69
70
Data
BDL=1/2DL Results
1.0 Std Dev.
1.0 Mean
1.0 C.V.
1.0 n
1.0
1.0 Mult Factor =
1.0 Max. Value
1.0 Max. Pred Cw
1.000
1.000
1.000
1.000
1.000.
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.0000
1.0000
0.0000
24
1.0000
1.0 ug/L
1.0 ug/L
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
' 71 06/19/03 <j
72 06/20/03
73 06/23/03 <1
74 06/24/03 =<:`
75 06/25/03
76 07/25/03 <s
77 07/28/03 <'
78 07/29/03 ' <'
79 07/30/03 'G
80 08/20/03 <'
81 08/21/03
82 08/22/03
83 08/25/03
84 09/24/03 : <
85 09/25/03
86 09/26/03
87 09/29/03
88 09/30/03
89 10/22/03 <'
90 10/23/03 <!
91 10/24/03 vG
92 10/27/03
93 11 /21 /03
94 11/24/03 <1
95 11/25/03 <
96 11/26/03 <�
97 12/05/03
98 12/24/03"<,
99 12/25/03 (;
100 12/26/03 -<
101 12/29/03 ,<?
102 01/01/04 <
103 01/27/04 <'
104 01/28/04 <<`
105 01/30/04 <'
106 02/18/04 <<
107 02/19/04 <,
108 02/20/04 <'
109 02/23/04 ` <i
110 03/22/04
111 03/23/04
112 03/24/04
113 03/25/04 <r
114 04/23/04 <`
115 04/26/04 <<
116 04/28/04
117 04/29/04 <'
118 04/30/04
119 05/21/04 <i
120 05/24/04 <`
121 05/25/04
122 05/26/04 .,
123 06/21 /04
124 06/22/04
125 06/23/04 <'
126 06/24/04 <
127 07/23/04
128 07/27/04 <_
129 07/28/04
130 07/29/04 <f
131 07/30/04
132 08/20/04 <
133 08/23/04.
134 08/24/04
135 08/25/04
136 09/23/04
137 09/27/04 .,
138 09/28/04
139 09/29/04
140 10/20/04
141 10/21/04
142 10/22/04
143 10/25/04 <'
144 10/26/04 <;
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
10 5.0
5 5.0
2 5.0
10 5.0
10 5.0
10 5.0
10 5.0
• 3 5.0
10 5.0
3 5.0
10 5.0
6 5.0
10 5.0
3 5.0
6 5.0
4 5.0
2 5.0
10 5.0
3 5.0
2 5.0
10 5.0
2.1 5.0
10 5.0
10 5.0
10 5.0
71;
72'
73.
74;
75;.
76
77
78
79,
80
81
82'' 83
84'
85'
86;
87'
88
89!
90;
91
92.
93'
94;
95•
96
97'
98;
99'
100'
101'
102•
103'
104,
105
106
107;
1081
109'
110,
111;,
112
1131
1141,
115:
116,
117!
118
119'
120
121
1221
1231
1241
125;
126;;
127'
128:
129
130:
131
132'
1331
134;
135
136
137
138!
139
140i
141,
142!
143`
144•
74268_rpa.xls, data
- 8 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
145 11/23/04 < 10
146 11 /24/04 < 10
147 11 /25/04 10
148 11/26/04 < 10
149 12/03/04< 10
150 12/22/04 < 10
151 12/28/04' < 10
152 12/29/04<' 10
153 12/30/04! 10
154 12/31/04 2.6
155 01 /25/05 10
156 01/26/05 < 10
157 01 /28/05 <; 10
158 01 /31 /05 < 10
159 02/17/05 <', 10
160 02/18/05 < 10
161 02/21/05 10
162 02/22/05 < 10
163 03/23/05< 10
164 03/24/05 .< 10
165 03/25/05 <i 10
166 03/28/05 }<= 10
167 04/21/05 < 10
168 04/22/05 :< 10
169 04/25/05 < 10
170 04/26/05 99 10
171 04/27/05 <r 10
172 05/23/05 < 10
173 05/24/05 < 10
174 05/25/05 fl< 10
175 05/26/05<10
176 06/21/05 < 10
177 06/22/05 10
178 06/23/05 a<' 10
179 06/24/05 % 10
180 07/22/05 < 10
181 07/26/05 E 10
182 07/27/05 <' 10
183 07/28/05 < 10
184 07/29/05 < 10
185 08/22/05 < 10
186 08/23/05t 10
187 08/24/05 ;'<; 10
188 08/25/05 < 10
189 08/26/05 < 10
190 09/23/05 <;; 10
191 09/27/05 `<' 10
192 09/28/05 <, 10
193 09/29/05 < 10
194 09/30/05 ' < 10
195 10/20/05 10
196 10/21/05 k< 10
197 10/24/05 < 10
198 10/25/05 < 10
199;.._;
200'
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
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
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
5.0
5.0
5.0
145. '
146
147•
148'
149
150!
151:
152
153'
154'
155'
156'
157 .
158
159
160.
161.
162
163'
164,
165
166:
167:
168
169'
170'
171
172'
173'
174:
175
176
177;
178,
179
180'
181
182
183;,
184E
185:
186:
187
188i
189,_
190'
191 -
192
193;
194;
195:
1961
197
198)
1991.
200
- 9 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
Mercury
Molybdenum
Date Data BDL=1/2DL Results
1 .._ Std Dev. 3.1272
2 Mean 2.0949
3 C.V. 1.4928
4 09/16/03 cl 1 0.5 n 114
5 09/17/03 <1 1 ' 0- .5
6 09/18/03 <s 1 0.5 Mult Factor = 1.8600
7 09/19/03 <: 1 ` 0.5 Max. Value 23.0 ng/L
8 10/16/03 ,<g 1 , 0- .5 Max. Pred Cw 42.8 ng/L
9 10/17/03 <i 1 0.5
10 10/20/03 << 1 0.5
11 10/21 /03 < 1 • 0.5
12 10/22/03 <1 0.5
13 11/13/03 . 1 . 1.2
14 11/14/03 1 1.2
15 11/17/03 5 1 ' 1.2
16 11/18/03 . j 1 1.1
17 12/16/03 t< 1 0.5
18 12/17/03 2 1.7
19 12/18/03 2 1.9
20 12/19/03 2 , 2.3
21 12/24/03 , ° 3 2.6
22 01/16/04 ' 4: 3.7
23 01/19/04 �gg 2 • 1.8
24 01/21/04 �E - .3; 2.9
25 01/22/04 4 ' 4.2
26 02/12/04 " 4 7 i 7.0
27 02/13/04 - 6 : 6.2
28 02/16/04 4 4.2
29 02/17/04 3= ` 4 = 4.2
30 03/16/04 'F 4 . 4.4
31 03/17/04 2 2.0
32 03/18/04 2 ' 1.5
33 03/19/04 n 2 < 2.2
34 04/15/04 , 2 1 1.7
35 04/16/04 = 1 1 1.4
36 04/20/04 2 2.5
37 04/21/04 - 1 1.2
38 04/22/04 T 2 ' 1.6
39 05/14/04 i 4 i 3.5
40 05/17/04 2.' 1.7
41 05/18/04 . 1 ' 1.2
42 05/19/04 <p 1 : 0.5
43 06/15/04 1 1.5
44 06/16/04 2 • 1.6
45 06/17/04 = # 1 = 1.4
46 06/18/04 . { 2 1.6
47 06/21/04 .r F 2 : 2.2
48 07/16/04 <, 1 ' 0.5
49 07/19/04 < 1 1 0.5
50 07/20/04 1 1 0.5
51 07/21/04 1 : 0- .5
52 08/16/04 ' 1 , 1.2
53 08/17/04 e. 1 0.5
54 08/18/04 <1 1 0.5
55 08/19/04 41, 1 . 0.5
56 08/20/04 < 1 , 0.5
57 09/16/04 3 ; 3.3
58 09/17/04 1 1.4
59 09/20/04 1 1.0
60 09/21/04 4 ' 4.0
61 10/14/04 1 1.1
62 10/15/04 <' 1 ` 0.5
63 10/18/04 t <1 1 ' 0.5
64 10/19/04 , "' 1 : 1.1
65 11/15/04 - 1 1 1.1
66 11/16/04 < ' ' 1 ' 0.5
67 11/17/04 '1 1.2
68 11/18/04 1 1.4
69 11/23/04 ' . 2 ' 1.7
70 12/16/04 j 4 ; • 3.7
1
2:
3
4
5
6:
7
8'
9
10
11,
12'
13,
14:
15'
16
17'
18'
19:
20
21_,
22;
23'
24
25,
26
27
28`
29
30
31;
32'
33,
34,
35
36
37,
38
39'
40'
41
42,
43;
44:
45
46;
47,
48,
49,
50
51'
521
53.
54,
55
56,
57:
58:
59.
60,
61
62'
63'
64
65,
66,°
67'
68:
69
70,
Date Data BDL=1/2DL Results
Oct-2005 '-1- 6.9 6.9 Std Dev. 9.7827
Sep-2005 ` 4 5.6 5.6 Mean 14.7545
Aug-2005 9 « 6 6.0 C.V. 0.6630
Jul-2005 5.6' 5.6 n 22
Jun-2005 23.9 23.9
May-2005 122 12.2 Mult Factor = 2.3900
Apr-2005 g 4' 4.0 Max. Value 33:6 ug/L
Mar-2005 3.2 3.2 Max. Pred Cw 80.3 ug/L
Feb-2005 9 ` 8.8
Jan-2005 15 14.6
Dec-2004 12 12.4
Nov-2004 (tt , 26 26.1
Oct-2004 ( 20 ' 20.4
Sep-2004 34 33.6
Aug-2004 26 26.2
Jul-2004 : 30 29.6
Jun-2004 4 32 ` 32.3
May-2004 14 . 13.8
Apr-2004 [ 14: 13.8
Mar-2004 5 4.5
Feb-2004 9 • 8.8
Jan-2004 � 12 ; 12.3
74268_rpa.xls, data
-10 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
71 12/17/04
72 12/20/04
73 12/23/04
74 01/17/05
75 01/18/05
76 01/20/05
77 01/21/05
78 02/11/05
79 02/14/05
80 02/15/05
81 02/16/05
82 03/16/05
83 03/17/05
84 03/18/05
85 03/21/05
86 03/23/05
87 04/14/05
88 04/15/05
89 04/18/05
90 04/19/05
91 05/16/05
92 05/17/05
93 05/18/05
94 05/19/05
95 05/20/05
96 06/15/05
97 06/16/05
98 06/17/05
99 06/20/05
100 07/15/05
101 07/18/05
102 07/19/05
103 07/20/05
104 08/16/05
105 08/17/05
106 08/18/05
107 08/19/05
108 08/22/05
109 09/16/05
110 09/19/05
111 09/20/05
112 09/21/05
113 10/14/05
114 10/17/05
115 10/18/05
116 10/19/05
117 10/20/05
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
13'
3
1
21
2
2
2
2
2f
7`
3
31
2
6'
21
1
2
1
1
1
1
6
2
1
1
1
1
1
13.4
2.7
1.1
0.5
1.2
1.5
1.8
2.3
2.1
2.0
2.3
7.1
2.7
3.0
2.2
6.4
1.5
1.4
1.5
1.4
1.7
1.2
1.1
0.5
1.4
6.1
1.6
1.2
0.5
1.4
1.1
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
1.1
19.0
23.0
0.5
0.5
0.5
0.5
0.5
711
72;
73,
74
75
76,
77.
78
79'
80
81;
821
83
84
85'
86'
87
88,
89
90'
91,
92;
93
94
95,.
961
971'
98'
99,
1001
1011
1021 .
103
1041
105'
106
107',
108
1091
1101
111
112
1131
114.
115,
116:'
117;.
1181
119' '
120;
121
122'
123.
124;
125.
126
127
128'
129j
1301
131!
132,
133
134,
135
136:
137j
1381
139;
140'
141
142
143
144'
'- 11 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188,
189
190'
191,
192'
193'
194
195,
196
197'
198
199
200:
145
146
147:
148:
149:
150'
151'
152
153;
154,
155
156'
157
158'
159
160•
161'
1621
163:
164
165'
1661
167
168
169'
170'
171:
172,
173'
174
175',
176'
177;
1781
179:
180'
181
182
183'
1841
185,
186:
187:
188;
189'
190,
1911
192`
193'
194'
195
196:
1971
198'
199,
200;
74268_rpa.xls, data
- 12 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
Nickel
Toluene
Date
1 Oct-2005
2;Sep-2005
3 ` Aug-2005
4, Jul-2005
5 Jun-2005
6 - May-2005
7 Apr-2005
8, Mar-2005
9; Feb-2005
10 Jan-2005
11: Dec-2004
12,
13 Nov-2004'
141 Oct-2004-
15 Sep-2004
16.1 Aug=2004.
17! JuI-2004
18` Jun-2004
191- ,May-2004
20; Apr-2004
21; Mar-'2004
22,;. „;
23' Feb-2004
24,., Jan-2004
25 !.
26 .-
27
28•
29;
30'- '
31'
32
33;
34;
35
36 :'
37'
38=
39{;.
40a
41;
42
43,'
44'
45's;
46'`
47:
48;
49
50'
51
52•
53`
54 `
55;
56,
57;
58•'
59.
60
61 ',
62'
63.
641
65;
66;
67•
68.
69
70;
Data BDL=1/2DL
7.2' 7.2
11.3 11.3
13.4' 13.4
8.6; 8.6
11' 11.0
8.4 8.4
9.5' 9.5
' 6.2, 6.2
31.6; 31.6
7.3' 7.3
113.0 113.0
16.0 16.0
9.4 9.4
7.4. 7.4
77.6 77.6
14.7` 14.7
13.6 13.6
28.0' 28.0
17.0€ 17.0
` 23.6, 23.6
17.2' 17.2
16.0 16.0
31.6 31.6
27.6. 27.6
Results
Std Dev. 24.4570
Mean 21.9667
C.V. 1.1134
n 24
Mult Factor = 3.49
Max. Value 113.0 ug/L
Max. Pred Cw 394.4 ug/L
Date
1 01 /17/02 <„
2 01/18/02
3 02/13/02 g < I
4 02/14/02
5 03/14/02 5s
6 03/15/02
7 04/15/02
8 04/16/02 Cry
9 05/16/02
10 05/17/02 C
11 06/13/02 ate,
12 06/14/02 <1
13 07/16/02 j
14 10/16/02
15 01 /17/03 ,<
16 04/15/03 1
17 07/17/031`<
18 10/16/63
19 01/16/041<a
20 04/15/04G.
21 07/15/04
22 10/14/04
23 01/17/05
24 04/14/05
25 07/14/05
26 10/14/05
271
28 I ,'
29;''
30`
31_
32'
33
34 h.
351;
36::
37"
38;
39,.
40;
41
42,-
433,
44e-.
45
46j
47
48d
49i
50:
511
52`,°.,
53'
54''
55'.
56
57;i
58'
59.
60;
61;"
62 -.
63
64=
65
66°
67`
68
69;;.
70
Data
BDL=1/2DL Results
1 0.5 Std Dev. 0.00
1 0.5 Mean 0.50
0.5 C.V. 0.00
1; 0.5 n 26
1 0.5
1 0.5 Mult Factor = 1.0000
1 0.5 Max. Value 0.5 ug/L
1 0.5 Max. Pred Cw 0.5 ug/L
1' 0.5
1 0.5
1' 0.5
1 0.5
1 0.5
i 0.5
1'
1
1'
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
- 13 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
71
72,
73..
74 -
75
76
77
78
79
80
81
82
83`
84
85
86 •
87
88
89
90'
91.
92
93
94'
95
96'
97
98
99'
100.
101;
102
103' " -
104
105
1061.
107
108
109!
110'.'
111;
112!
113;
114,
115
116
117;"
118:
119
120.
121'=
122 •
123
124'
125!
126`
127
128_
129'
130,
131,,
132
133
134,
135!
136;
137
138
139
140'
141i '
142
143
144
71,
72,
73
74
75`
76
77
78
79:
80
81;
82'.
83'
84.
85'
86
87'
88'
89'
90;
91
921
93
94
95:
96,
971
981
99
100,
101:
102;
103'
104,
105;
106!
107!
108
109,
110
111
112
113:
114`
115'.
1161
117'
118E
119'
120i
121i
122!
123'
124
125,
126,
127'
128:
129;
130:
131,
132,
133,
1341
135
136
137'
138
139'
140.
141,
142'
143
144,
74268_rpa.xls, data
- 14 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
145,
146,
147,
1481
149
150
151'
152
153'
154i
155 '
156:
157;
158'
159,
160
161
162;-
163;
164`
165;
166:
167!
168i
169
170:
171;
172;
173i
1741
175j
176i
177:
1781
179',
180,
181
1821
183
184
1851-
186
187'
1881
1891
190i
1911
192
193:
194'
195i
196
1971,
198'
199;
200
145;
146,
147
148'
149
150'
151;
152,
153•
1541
155:
156
157,
158'
159'
1601
161
162;
163:
164,
165;
1661
167:
1681
1691
1700
171!
172'
173'
174'
1751
176:
177
178!
179
1801
181
182;
1831
1841
185
186
187E
188
169
190
191i
1921
193
194!
1951
196;
197;
198,
1991
200,
--15-
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
Selenium
Silver
Date
1 Oct-2005
2 Sep-2005
3. Aug-2005
4, Jul-2005
5 Jun-2005
6 May-2005
7 Apr-2005
8, Mar-2005
9 . Feb-2005
10 Jan-2005
11 Dec-2004
12
13' Nov-2004
14, Oct-2004
15, Sep-2004
16, Aug-2004
17 Jul-2004
18 Jun-2004
19 May-2004
20 Apr-2004
21 Mar-2004
22'
23 Feb-2004
24: Jan-2004
25'
26
27
28,
29:
30'
31
32'
33'
34.
35;
36;
37
38,
39:
40'
41'
42'
43
44
45
46'
47'
48;
49!
50
51;
52'
53:
541
55;
56:
57,
58''
59,
60•
61.
62
63
64!
65 '
66:
67:
68:
69
70,
Data
BDL=1/2DL Results
2; 1.0 Std Dev.
2! 1.0 Mean
2 1.0 C.V.
2' 1.0 n
2; 1.0
2! 1.0 MultFactor=
2! 1.0 Max. Value
2; 1.0 • Max. Pred Cw
2 I 1.0
2 ; 1.0
2 ' 1.0
2 . 1.0
2 , 1.0
2 , 1.0
2 { 1.0
2 ' 1.0
2 ' 1.0
2 . 1.0
2 1.0
2 ' 1.0
2 ! 1.0
2 , 1.0
2 ! 1.0
2 1.0
0.0000
1.0000
0.0000
24
1.0000
1.0 ug/L
1.0 ug/L
Date Data
1 03/07/02
2 07/05/02 `<
3 07/08/02 <
4 08/29/02
5 08/30/02 ' <
6 09/03/02 <
7 09/30/02 "<
8 10/03/02 ;.`
9 10/31 /02 .r<
10 11/28/02 <
11 11/29/02 <
12 12/13/02 <
13 12/24/02 <
14 01/01/03 '<
15 01/03/03 <
16 02/27/03
17 02/28/03 <
18 03/04/03 <
19 03/31/03 <
20 04/09/03 <,
21 04/16/03 <
22 05/15/03 =<
23 05/20/03 <,
24 06/03/03
25 06/30/03 <
26 07/15/03
27 07/23/03 <
28 08/28/03 .<
29 08/29/03
30 09/25/03 ,<:
31 09/29/03 <
32 10/30/03
33 10/31/03
34 11/03/03
35 11/14/03
36 12/05/03
37 12/25/03
38 01/09/04
39 01/26/04
40 02/26/04
41 02/27/04
42 03/05/04
43 03/11/04
44 03/31/04
45 04/13/04
46 04/26/04
47 05/14/04
48 05/17/04
49 06/29/04
50 06/30/04
51 07/16/04
52 07/30/04
53 08/30/04
54 08/31/04
55 09/10/04
56 09/24/04
57 10/04/04
58 10/29/04
59 11/25/04
60 11/26/04
61 12/03/04
62 12/06/04
63 01/07/05
64 01/27/05
65 02/25/05
66 02/28/05
67 03/07/05
68 03/18/05
69 04/01/05
70 04/06/05
BDL=1/2DL Results
2 1.0 Std Dev. 0.0000
2' 1.0 Mean 1.0000
2' , 1.0 C.V. 0.0000
2 1.0 n 82
2' 1.0
2' 1.0 Mult Factor = 1.0000
2 1.0 Max. Value 1.0 ug/L
2, 1.0 Max. Pred Cw 1.0 ug/L
2 1.0.
2 1.0
2' 1.0
2. 1.0
2 1.0
2 1.0
2 1.0
2, 1.0
2 1.0
2. 1.0
2 1.0
2' 1.0
2, 1.0
2. 1.0
2. 1.0
2; 1.0
2; 1.0
2' 1.0
2 1.0
2' 1.0
2, 1.0
2, 1.0
2: 1.0
2, 1.0
2' 1.0
2: 1.0
2; 1.0
1.0
2; 1.0
2' 1.0
2' 1.0
2' 1.0
2: 1.0
2; 1.0
2; 1.0
2! 1.0
2! 1.0
2, 1.0
2, 1.0
2; 1.0
2' 1.0
21 1.0
2; 1.0
2; 1.0
2` 1.0
2, 1.0
2' 1.0
2' 1.0
2: 1.0
2' 1.0
2! 1.0
2: 1.0
2 1.0
2, 1.0
2 1.0
2: 1.0
2' 1.0
2` 1.0
2; 1.0
2, 1.0
2' 1.0
2, 1.0
-16-
74268_rpa.xls, data
12/27/2005 •

t
REASONABLE POTENTIAL ANALYSIS
71
72
73'
74;
75`
76'
77
78,
79'
80.
81
82'
83
84
85'
86:
87
88
89'
90
91,
92
93.
94
95
96:
97;
98:
99
100,
101!
102;
103
104
105!
106,
107.
108.
109
110:
111;
112:
113
114;
115i
116!',
117!
118
119!
120;
1211
122'
1231
124'
125'
1261
127 !
128,
129:
130,
131;
132!
133'
134
135
136
137!
138
139;
140.
141,
142
143;
144;
71 05/12/05
72 05/18/05
73 06/29/05
74 06/30/05
75 07/15/05
76 07/27/05
77 08/05/05
78 08/31/05
79 09/16/05
80 09/27/05
81 10/28/05
82 10/31/05
83
84
85,
86
87;
88;
89
90;
91'
92:
93
94;
95
96
97,
98!
99
100'
101
102f
103
104
105
106
107
108!
109
110
111
112j
113,
114!
115
116
117
118!
119'
120.
121,
122!
123•
1241
125!
126.
1271
128;
129
130i
131!
1321
133
134
1351
i
136;
137;
138!
1391
1401
141
142,
1431
144i
2
2
2
2'
2;
2'
2
2
2
2
2
2
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
- 17 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
145 {
146
147`
148;
149:
150i
151;
152;
153!
154:
155'
156?
157
158
159:
160;
161;
162
1631
164:
1651
1661
167
168
1691
170
171
172;
173!
174
175:
1761,
177i
178'
1791
180i
1811
182;
1831:
1841.
1851
186,
187;
188;
1891
190;
191'
192
193:
.1941
1951
196,
1971
1981
199i
200!
145
146
147,
149,
150
151
152
153
154'
155
156
157
158
159
160
161
162
163
164'
165
166
167
168
169
170
171
172
173
174,
175
176,
177
178
179
180
181
182
183
184
185
186
187,
188'
189'"
190
191
192'
193
194,
195
196,
197
198
199'
200
74268_rpa.xls, data
-18 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
Zinc
0
Date Data BDL=1/2DL Results
1 03/13/02 ` 56.2 56.2 Std Dev. 15.6075
2 07/15/02 ; 44.6 44.6 Mean 48.0305
3 07/22/02 39.7 39.7 C.V. 0.3250
4 08/07/02 47.2 47.2 n 82
5 08/12/02 59.1 59.1
6 09/11/02 26.5 26.5 Mult Factor = 1.2600
7 09/20/02``� 28.2 28.2 Max. Value 134.0 uglL
8 10/10/02p 31.1 31.1 Max. Pred Cw 168.8 ug/L
9 10/18/02 " 26.2 26.2
10 11/04/02
35.4 35.4
11 11/12/02 74.2 74.2
12 12/16/02 „u 62.6 62.6
13 12/27/02 "' ` 34.7 34.7
14 01/20/03 47.6 47.6
15 01/21/03 44.7 44.7
16 02/07/03 `, 41.2 41.2
17 02/10/03 oEe3 40.1 40.1
18 03/14/03 57.8 57.8
19 03/21/03 48.3 48.3
20 04/04/03 •a; 51.7 51.7
21 04/22/03 52.6 52.6
22 05/26/03 53.5 53.5
23 05/30/03 42.4 42.4
24 06/09/03 r-".:r 43.2 43.2
25 06/18/03 48.2 48.2
26 07/04/03 22.8 22.8
27 07/12/03 =" 29.4 29.4
28 08/04/03 43 43.0
29 08/14/03 54.8 54.8
30 09/02/03 y . 53.6 53.6
31 09/12/03 ' 58.6 58.6
32 10/07/03 58.4 58.4
33 10/16/03 58.9 58.9
34 11/22/03 `_< 27.3 27.3
35 11/24/03 r_ 33.6 33.6
36 12/22/03 51.6 51.6
37 12/24/03 ,; 91.5 91.5
38 01/19/04 >' 134 134.0
39 01/26/04 ,` 51 51.0
40 02/06/04 50.2 50.2
41 02/13/04 sa 61.2 61.2
42 03/05/04 36.8 36.8
43 03/15/04 40.1 40.1
44 03/25/04 k ,= 36.1 36.1
45 04/02/04 '`" 41.4 41.4
46 04/09/04 ; r_ 45 45.0
47 05/07/04 43.4 43.4
48 05/31/04:.41.2 41.2
49 06/03/04 56.2 56.2
50 06/07/04 25.2 25.2
51 07/03/04 "r'" 43 43.0
52 07/07/04 ' `00. 44 44.0
53 08/05/04 0.A- 53.4 53.4
54 08/13/04 ' 44.4 44.4
55 09/06/04 42.5 42.5
56 09/30/04 35.8 35.8
57 10/15/04„„n 28.8 28.8
58 10/22/04 ' i 43.8 43.8
59 11/15/04_'! 45.8 45.8
60 11/22/04 <0:° 44.6 44.6
61 12/20/04,, 56.9 56.9
62 12/23/04 y' 74.8 74.8
63 01/17/05 455 55.0
64 01/24/05 47.8 47.8
65 02/03/05 -_ 65.6 65.6
'a :.
66 02/07/05 63.8 63.8
67 03/04/05 ' 51.2 51.2
68 03/25/05 46.8 46.8
69 04/15/05 49.2 49.2
70 04/21/05 53.6 53.6
1
2'
3'.
5'
6:
7'
8;
9,
10
11'
12:
13'
14
15'
16
17
18'
19:
20
21.
22
23:
24'
25.
26;
27;
28;
29'
30i
31;
32!
33
34;
35
361
37!
38:
39
40;
411
421
43;.
44
451
46:
47:
48'.
49i.
50
51i
52
53!
54'
55,
56;
57!
58 ;'
59:
60!
611
62'
63
641
65
66
67;
68'
69!
70
Date Data BDL=1/2DL
Results
Std Dev. NO DATA
Mean NO DATA
C.V. NO DATA
n 0
Mult Factor N/A
Max. Value 0.0 0
Max. Pred Cw N/A 0
-.19 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
71
72
73
74
75
76
77
78
79
80
81
82
83.
84
85
86
87
88,
89
90
91'
92
93.
94
95
96'
97,
98,
99!
100
101
102;
103'
104
105'
106:
107,
108
109•
110
111'
112.
113
114
115,
116
117T
118;
119;
120
121
122
123'
124
125
126
127'
128'
129,
130,
131,
132'
133
134.
136'
137'
138'
139;
140'
141•
142
143
144,
05/27/05 _ 58 58.0
05/30/05 72.6 72.6
06/01/05 56.4 56.4
06/10/05 60.1 60.1
07/01/05 `'" 37.2 37.2
07/08/05 42.3 42.3
08/10/05 35.8 35.8
08/19/05 43 43.0
09/02/05 44.2 44.2
09/06/05 ' 44 44.0
10/04/05 34.2 34.2
10/14/05 "' 37.6 37.6
{
71
72
73
74
75'
76'
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93,
94'
95
96
97
98'
99
100,
101
102'
103'
104'
105,
106.
107
108:
109:
110'
111,
112
113
114
115:
116
117,
118,
119,
120,
121
122
123:
124
125
126,
127'
128'
129'
130.
131'
132,
133
134
135
136.
137
138,
139'
140
141
142
143
144,
74268_rpa.xls, data
- 20 - 12/27/2005

REASONABLE POTENTIAL ANALYSIS
145'
146 '
147;
148
149
150
151
152
153
154'
155
156
157
158
159
160
161
162'
163,
164.
165.
166
167
168'
169;
170'
171'
172,
173'
174'
175'
176,
177
178;
179
180
181,
182]
183
184
185'
186'
187'
188,
189'
190,
191'
192:
193
194
195'
196
197
198'
199
200
145,
146
147
148
149'
150,
151:
152i
153'
154
155!
156'
157,
158'
159'.
160
161
162
163.
164'
165-
166 ,
167
1681
169'
170
171
172,
173;
174!
175
176
177
178;
179
180
181;
182'
183
184
185
186;
187'
188'
189'
190
191;
192'
193'
194:
195'
196'
197;
198
199:
200'
,21 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
t
0
Date
Data BDL=1/2DL Results
Std Dev. NO DATA
} Mean NO DATA
C.V. NO DATA
n 0
Mult Factor = N/A
Max. Value 0.0 0
Max. Pred Cw N/A 0
22_
74268_rpa.xls, data
12/27/2005

ti
REASONABLE POTENTIAL ANALYSIS
71
72,
73,
74
75
76,
77',
78'
79,
80.
81:
82'
83.
84'
85,
86,
87.
88;
891
90'.
91.
92'
93;
94!
951
96'
97l
98!
991'
100,
101; ,
102
103:
104
105'.
106;
107
1081,
1091'�.
1101/
111',
116'�
117
118 r:
1191
120'
1211'
122(
123)
1241'
1251-
1267
127'
128'.'
1291
130
131r-:
132;
133
134i
135
1361:'
1371
138E
140'
141
142'
143
144,
" -23 -
74268_rpa.xls, data
12/27/2005

REASONABLE POTENTIAL ANALYSIS
145
146
147
148
149''
150'
151
152
153
154
155
156
157
158
159
160
161
162
163
164,
165
166
167
168
169
170
171'
172
173
174
175
176
177
178
179
180
181.
182'
183
184;
185,
186
187
188
189,
190
191
192
193
194
195.
196
197
198
199
200'
1
74268_rpa.xls, data
- 24 - 12/27/2005

SOC Priority Project: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Carolyn Bryant
Date: May 24, 2005
NPDES STAFF REPORT AND RECOMMENDATION
County: Gaston
MRO No.: 05-43-1--=---7- ,,7,' "-
Permit No. NC0074268
PART I - GENERAL INFORMATION
1. Facility and address: Crowders Creek WWTP
City of Gastonia
Post Office Box 1748
Gastonia, North Carolina 28053
n
r
i
MAY 3 1 2005
DENR - WATER QUALITY
POINT SOURCE BRANCH
2. Date of investigation: 5-18-2005
3. Report prepared by: Samar Bou-Ghazale, Env. Engineer I
4. Persons contacted and telephone number: Mr. David Morgan, ORC, [phone]
5. Directions to site: The facility is located approximately 3/4 mile north of the North
Carolina/South Carolina border on the west side of Highway 321 in Gaston County.
6. Discharge point(s), List for all discharge points:
Latitude: 35 ° 10' 10" Longitude: 81° 11' 46"
Attach a USGS map extract and indicate treatment facility site and discharge point on map.
U.S.G.S. Quad No.: G14NW U.S.G.S. Quad Name: Gastonia South, NC -SC
7. Site size and expansion area consistent with application? Yes.
8. Topography (relationship to flood plain included): Slopes range from 5 to 10%, the WWTP is not
in a flood plain.
9. Location of nearest dwelling: None within 1000 feet.
10. Receiving stream or affected surface waters: Crowders Creek.

Page Two
a. Classification: C
b. River Basin and Subbasin No.: Catawba 030837
c. Describe receiving stream features and pertinent downstream uses: Receiving stream is
approximately 40 feet wide x 3-5 feet deep with sandy/muddy bottom. General "C"
classification uses downstream (rural/agriculture).
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 6.0 MGD (ultimate design capacity)
b. Current permitted capacity of the wastewater treatment facility: 6.0 MGD
c. Actual treatment capacity of the current facility (current design capacity): 6.0 MGD
d. Date(s) and construction activities allowed by previous Authorizations to Construct issued
in the previous two years: N/A
e. Please provide a description of existing or substantially constructed wastewater treatment
facilities: The existing WWT facilities consist of a mechanical bar screen, grit removal
chamber, an influent pump station, dual primary clarifiers, dual anoxic/oxic basins, dual
final clarifiers, two polishing ponds, a chlorine contact chamber (gas), SO2
dechlorination, a static post aerator, a DAF (dissolved air floatation) unit, four anaerobic
digesters, one gravity sludge thickener, one filter belt press dewatering unit, and alum and
caustic addition.
f. Please provide a description of proposed wastewater treatment facilities: N/A
g. Possible toxic impacts to surface waters: This facility serves several industries which may
have toxic discharges including heavy metals.
h. Pretreatment Program (POTWs only): Approved.
2. Residuals handling and utilization/disposal scheme:
a. Residuals are land applied. DWQ Permit No. WQ0001793.
Residuals Contractor: Amsco
Telephone No.: [phone].
b. Residuals stabilization: PSRP
c. Landfill: Waste from the grit chamber and bar screen are removed by BFI and transported
to Gaston County landfill.
3. Treatment plant classification: Class IV
4. SIC Code(s): 4952 Wastewater Code(s) 01
Main Treatment Unit Code: 01303

Page Three
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies involved
(municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: None at this time.
3. Important SOC, JOC or Compliance Schedule dates (Please indicate): N/A
4. Alternative Analysis Evaluation: N/A
5. Air quality and/or groundwater concerns or hazardous materials utilized at this facility that may
impact water quality, air quality, or groundwater: No AQ or GW concerns, nor are hazardous
materials utilized at this facility with the exception of chlorine.
PART IV - EVALUATION AND RECOMMENDATIONS
The City of Gastonia has applied for Permit renewal for the subject facility. The WWTP appeared
to be in good operational condition.
A review of the past year's self -monitoring data, from 03/2004 through 02/2005, revealed no
violations. Also, the City of Gastonia is in compliance with its pretreatment program.
Pending review and approval by P& E, it is recommended that the permit be renewed as
requested.
e;;;4.711L-
Signature of report p • are Date
Surface Water Pr ection y Regional Supervisor Date

r
(itp of atonic
P.O. BOX 1748
aOtonia, , .ortij (Carolina 28053-1748
WASTEWATER TREATMENT DIVISION
FEB 282005
Ms. Valery Stephens
NC DENR - DWQ
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699
February 16, 2005
Re: Renewal Application of Permit NC0074268 Crowders Creek WWTP
Dear Ms. Stephens:
On behalf of the City of Gastonia, I am requesting renewal of the National Pollutant
Discharge Elimination System Permit #NC0074268 for the Crowders Creek Wastewater
Treatment Plant. A permit application and associated information including a sludge
management plan are being submitted along with this letter. This permit renewal
application is being submitted by the March 4, 2005 deadline to comply with
requirement to apply 180 days prior to the date of permit expiration (August 31, 2005).
As requested, please find the original signed version of this information along with two
copies.
The Crowders Creek Wastewater Treatment Plant continues to operate as an advanced
biological nutrient removal plant treating municipal wastewater for the City of Gastonia.
Several minor upgrades have taken place at the plant since the previous permit renewal
request, which have all been made to enhance the treatment process and efficiency.
Examples include installation of an improved chlorine/sulfur dioxide control system,
sludge pumping improvements, and modifications to allow flushing water use for
chemical feed. Several other projects are underway including an upgrade of chemical
feed systems, rehabilitation of the primary digester (which will include a new digester
cover and mixing system), upgrade to the main lift station, installation of a mixer in Oxic
Zone 4 in order to operate as an additional anoxic zone, and improvements to the
SCADA process control.
All analyses have been tested by North Carolina certified laboratories in accordance
with 40 CFR Part 136 requirements. This application includes all data gathered for the
American Quality A....w,.
1S0 14001 Certified
Pure andCCean for our gieLds and Streams

last four and one half years up through December 31, 2004. Efforts have been made to
obtain seasonal variation in the sampling as much as was possible.
If you would like any additional information, or if I can be of any assistance please feel
free to call me at 704-866-6991 or e-mail at [e-mail].
Sincerely,
6-6
Larry W. Cummings
Division Manager of Wastewater Treatment
City of Gastonia
cc: Mathew W. Jordan, P.E., Director of Public Works & Utilities, Gastonia
David Hux — Assistant Division Manager of Operations, Gastonia
David Shellenbarger — Assistant Division Manager of Compliance, Gastonia
David Morgan — Senior Plant Operator, Gastonia
Nancy Matherly— Industrial Chemist, Gastonia
Certified Mail: 7002 1000 0004 8617 2905

Permit Renewal Package for
NPDES Permit # NC0074268
Crowders Creek Wastewater Treatment Plant
City of Gastonia
Submitted: 2-21-04

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Crowders Creek WWTP, NC0074268
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Section B.1. Inflow and Infiltration.
Briefly explain any steps underway or planned to minimize inflow and infiltration.
The City of Gastonia seeks to correct all sources of inflow or infiltration. The Crowders Wastewater
Treatment Plant and most of the collection system that feed into it are relatively new and in good condition.
While inflow and infiltration have been of some concern in the Crowders Creek basin, the City has been
particularly concerned with the older portion of Gastonia's collection system that feeds into the Long
Creek Wastewater Treatment Plant, and has concentrated its efforts there. The City has performed smoke
testing as part of a sewer system evaluation study to identify sources and extent of inflow/infiltration.
Based on these identified sources the City is undergoing efforts to eliminate them. The following is the
major project that has been identified in the collection system that feeds into Crowders Creek WWTP and
its current status:
• Crowders Creek Outfall — Raise twenty-five manholes of the collection system at the influent of
Crowders Creek WWTP to prevent excess water from being treated when flooding occurs at low
lying points at the influent of the WWTP. Increase plant performance during flood events to treat
as much flow as possible and prevent flooding wastewater treatment plant influent station.
Targeted for fiscal year 2005/2006. Estimated cost - $37,500
The Crowders Creek WWTP receives flow from three satellite systems, which are responsible for their
own collection systems. Gastonia encourages all these systems to perform inflow and infiltration reduction
work and all report performing at least some minor I & I work. The City of Kings Mountain additionally
reports to have relined 378 feet of gravity sewer, rebuilt 36 manholes, rehabbed 6 manholes, and repaired
three sections of water main that were leaking into the sewer main.

B.2 Topographical
Map of Crowders WWTP
Permit #NC0074268
Legend
Facility Boundary
Parcels
Ground Water Wells
.25 Mile Buffer
Roads
Sewer Nodes
Structures
Air Rel Valve in Manhole
Manhole
Abandon Manhole
Proposed Manhole
SLS
Abandon SLS
O Valve
Monitoring Well
Meter
b Plug
Inverted Siphon
Chemical Manhole
• Treatment Plant
e Uncoded Node
Abandon Uncoded Node
Sewer Lines
Lines
MAIN
► FORCE MAIN
USGS Quandrangle
Map Referenced:
Gastonia South
0 0.3 0.6 Miles
I 1 1
Bowling Green
Ihd , ridi
ds
Crowders Creek WWTP Outfall 001
Latitude 35 degrees 10' 10"
Longitude 81 degrees 11' 48"
Digesters for treatment and storage of sludge.

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Crowders Creek WWTP, NC0074268
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Section B.3. Process Flow Diagram or Schematic
Process Flow Description
The Crowders Creek WWTP is a 6-mgd facility operated by the City of Gastonia which
discharges to Crowders Creek. Influent wastewater enters the plant through a 42" gravity
feed sewer line and passes through coarse manual and fine mechanical screens and a
Detritor grit collector. Following preliminary treatment, the flow enters the main lift
station. Four influent pumps lift the influent flow to manhole #1 (MH-1) and the flow is
split to two primary clarifiers. The primary clarifier effluent is combined with the return
activated sludge (RAS) in MH-2 where the flow is split to two biological treatment sides.
The biological treatment follows a modified Ludzak-Ettinger process and consists of
anaerobic, anoxic and oxic basins, with optional step feed and internal oxic recycle
pumping for denitrification. Following the biological treatment process, flow is
combined in MH-3 and routed to the two final clarifiers. Sludge from these clarifiers is
routed to MH-2 as RAS or thickened in a dissolved air floatation thickener (DAFT) and
sent to the anaerobic digesters as waste activated sludge (WAS). The effluent flow from
these final clarifiers is again combined then split to two polishing ponds. Effluent from
these polishing ponds is disinfected in an open chlorine contact chamber by injection of
chlorine solution. Sulfur dioxide is injected into the chlorinated effluent for
dechlorination. Finally, the effluent is discharged through a three -stage static aeration
devices to a 48" line, which discharges to Crowders Creek. The plant has a belt filter
press and solids contact reactor that are currently not being utilized. The process flow
schematics show all of the processes of the treatment plant along with backup power
sources. The plant has three generators with outputs of 150 KW, 750 KW and 1000 KW
located throughout the plant.

AN
AX
Influent
6 mgd
Main Lift /
Screening /
Grit Removal
Crowders Creek WWTP — Process Flow Schematic
Primary 3
Clarifiers
3 mgd
Add
— Caustic
mgd
s
1a
E
Primary M
Sludge RAS
Acetic me d
Addition
AN
AN
0.43 mgd internal recycle
AX
1 mgd (in Summer only)
1 mgd (in Summer only)
Acetic Acid
Addition
AX
r etic A ,u
Addition
AX
Treatment Trains
0.43 mgd internal recycle
OX
Acetic Acid
Addition
4.5 mgd
4.5 mgd
9 mgd
Final Clarifiers
4.5 mg y
4.5mg y
. Splitter
Anaerobic
Anoxic
Oxic
RAS WAS
riri
*Plant design allows for multiple step feed
options into areation basin
6m*
Chlorine
Contact
6 mg
n,a"chlorinatior
Static
Aerator
To Crowders Creek
3
ca
Q

MaintenanceiStorage Buildin
Chemical Feed Buildin
Air Blower Building
DiscNed Air Floatation Tanks (DAFT---.
Solids Contact Reactor
Belt Press Build'
Storage
Retu Sludge Pump Station
M 2
C
7 Prima t / Primary\
Clarifier { Clarifier
A
3 .4wihole Ni
Flushing Water
Pumping Station
Lab/Operations Budding
Polishing
Pond #1
n Lift
Crowders Creek
Chb ' Contact Tanks
Crowders Creek WWTP — Location of Backup Electrical Generation

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
SIGNIFICANT INDUSTRIAL USER INFORMATION:
PERMIT ACTION REQUESTED:
Renewal
to the treatment works, copy
RIVER BASIN:
Catawba River Basin
questions F.3 through F.8 and
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
F.3.
F.4.
F.5.
F.6.
F.7.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: A.B. Carter
Mailing Address: PO Box 518
Gastonia, NC 28053
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Nickel plating, wire cleaning, copper coating, black oxide, groundwater remediation, washdown.
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): molded nylon and steel travelers, steel spinning rings, steel wire
Raw material(s): steel rod, nylon granules
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection
whether the discharge is continuous or intermittent.
19,000 gpd ( continuous or X intermittent)
system in gallons per day (gpd) and
into the collection system in gallons per
based on 25 gallons per person.
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent) *Flow
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Metal Finisher 40 CFR 433.15
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.
2004: User discharged excessive Nickel such that Crowders biosolids could not be land applied. City blended Crowders and Long WWTP biosolids to
obtain acceptable level of Nickel. User entered into a Consent Order with City which stipulates monetary penalties, expenditure for equipment, and improved
operation and treatment.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: Carolina By -Products Gastonia Division
Mailing Address: 5533 South York Road
Gastonia, NC 28052
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Discharge fromprocess, washdown, air quality units, boiler blowdown and domestic.
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): Poultry meal, feather meal, fat and grease
Raw material(s): meat, bones, feathers, blood, used cooking oil
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.
140,000 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.
15,000 gpd (X continuous or intermittent) *Flow based on 25 gallons per person.
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards 0 Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
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?
0 Yes ® No If yes, describe each episode.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: City of Bessemer City
Mailing Address: 132 W. Virginia Avenue
Bessemer City, NC 28016
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Domestic discharge from residential and business; 5,000god from 1 textile facility.
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): N/A
Raw material(s): Domestic wastewater
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.
5,000 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.
542,000 gpd (X continuous or intermittent) *Flow based on 25 gallons per person.
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?
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?
0 Yes ® No If yes, describe each episode.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: City of Kings Mountain
Mailing Address: PO Box 429
Kings Mountain. NC 28086
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Domestic. process, washdown, blowdown, cooling, non -cooling from residential. commercial and industrial sources: 29,000gpd from 1 metal finisher: 5,000 from
1 latex textile facility.
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 N/A
product(s):
Raw material(s): Domestic wastewater
F.B. 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.
34,000 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.
531,000 gpd (X continuous or intermittent) *Flow based on 25 gallons per person.
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards 0 Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
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?
0 Yes ® No If yes, describe each episode.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: Noveon
Mailing Address: 207 Telegraph Drive
Gastonia. NC 28056
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Process and washdown of OCPSF 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): latex resins and coatings
Raw material(s): styrene butadiene, vinvlidene chloride, acrylic monomer, surfactants
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.
33,000 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.
gpd ( continuous or intermittent) "Flow based on 25 gallons per person.
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards ® Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
OCPSF 40 CFR 414.85
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?
CO Yes ❑ No If yes, describe each episode.
2002: User contributed to Citv's violation of Total Nitrogen limit. User entered Consent Order with City. User paid civil penalty and ceased discharge of
one wastestream to City sewer system.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: Powder Coating Services Inc.
Mailing Address: 1260 Shannon Bradley Road
Gastonia, NC 28052
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Coatings, electrostatic painting, domestic through separate pipe
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): painted steel
Raw material(s): steel, paint, cleaners, sealant
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.
30,900 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.
*500 gpd ( continuous or intermittent) *Flow based on 25 gallons per person.
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Metal Finisher 40 CFR 433.17
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.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: Rauch Industries
Mailing Address: PO Box 609
Gastonia, NC 28053
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Process, domestic, cooling tower and boiler blowdown
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): painted glass Christmas ornaments and satin omaments
Raw material(s): glass, paint, ammoniacal silver nitrate
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per day (gpd) and
whether the discharge is continuous or intermittent.
3,000 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
8,400 gpd (X continuous or intermittent) *Flow based on 25 gallons per person.
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?
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.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
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: Town of Clover
Mailing Address: 500 Willow Street
Clover, SC 29710
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Discharge of domestic, cooling, non -contact cooling, washdown and process wastewater from residential and business sources.
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): N/A
Raw material(s): Domestic wastewater
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.
7,000 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.
290,000 gpd (X continuous or intermittent) *Flow based on 25 gallons per person.
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards 0 Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
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.

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Crowders Creek WWTP, NC0074268
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Sludge Management Plan
for
Crowders Creek Wastewater Treatment Plant
NPDES Permit # NC0074268
The Crowders Creek Wastewater Treatment Plant (WWTP) design for sludge handling consists
of anaerobic sludge digestion followed by land application. This plan describes the processes in
place for treating and disposing of this material.
Anaerobic Digestion:
The anaerobic digestion system consists of four anaerobic sludge digesters, each with a volume
of approximately 466,000 gallons, which treat the primary and waste -activated sludge from the
WWTP. On average, the City of Gastonia sends approximately 24,000 gallons of raw and
thickened wasted solids to these digesters each day for treatment. One of the digesters is heated
and operated as primary digester, two digesters are used as secondary digester and the other one
is utilized for sludge storage.
Raw sludge from the bottom of two primary clarifiers is pumped to the primary digester where it
is retained for at least 15 days at a temperature greater than 35 °C. Wasting from the secondary
clarifiers is also pumped to the primary digester, however these solids are first thickened in the
dissolved air floatation thickener (DAFT) unit. As sludge is pumped from the clarifiers to the
primary digester, a similar volume is pumped from the primary digester to the secondary
digesters. The digested sludge can then be stored in the remaining digester as needed until land
application.
Crowders final holding digester has a capacity of 466,000 gallons. Additionally, the City of
Gastonia operates a residuals storage facility at the City of Gastonia's Resource Recovery Farm
located between Dallas and Cherryville. This facility is capable of storing an additional eight
million gallons of biosolids when application activities are hindered by inclement weather.
The Crowders Creek WWTP currently complies with the 503 pathogen reduction requirement
for Class B biosolids by a PSRP process (40 CFR Part 257 Appendix II). Pathogen reduction is
demonstrated by documentation of primary digester MCRT and temperature, with fecal coliform
testing occasionally performed as back-up method. At a minimum, the primary digester
temperature and solids retention time (SRT) are recorded weekly. If high influent sludge flows
result in a reduced primary digester SRT, then the secondary digester SRT and temperature are

•
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Crowders Creek WWTP, NC0074268
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Sludge Management Plan (Continued)
also recorded. Vector attraction reduction is demonstrated by a measurement of 38% volatile
solids reduction using the Van Kleeck's equation or a 40 day additional anaerobic digestion
bench scale test. At least once per week, the % volatile solids of the raw sludge, DAFT sludge
and digested sludge are analyzed and the %VS reduction is calculated.
Land Application Program:
For beneficial reuse of these biosolids, the City of Gastonia utilizes land application for disposal
of these solids. For the past three years, Gastonia has had a contract with Otter Creek
Environmental to perform this land application but has recently started utilizing EMA Resources,
Incorporated to perform this function. Biosolids are land applied to 2,273.2 acres of local
farmland throughout the county, in accordance with NCDENR Land Application Permit
WQ0001793. One hundred eighty-two of those acres are on City owned land at the Resource
Recovery Farm and the remainder is private farmland.
Environmental Management System:
The City of Gastonia's Wastewater Treatment Division, which includes the biosolids program,
has implemented and operated under an ISO 14001 Environmental Management System since
2001. The City has seen many benefits from this program in better organization, improved
compliance, controlled environmental impacts and greater efficiencies. Because of these
benefits, the City is in the process of instituting the National Biosolids Partnership
Environmental Management Program. The City believes that this program will help further
improve some aspects of its biosolids handling. In particular, it is believed that through this
program the biosolids program will benefit from inclusion of the City's contractor in the
environmental management system, inclusion of the best management practices in the program,
improved public acceptance of the program and a greater emphasis on biosolids quality.
Future Plans:
Gastonia has just completed an extensive Wastewater Master Plan Study. One of the areas
identified for future work was the digester complex at the Crowders Creek WWTP. The
engineering firm of Black & Veatch is currently under contract and working on the design for
rehabilitation of these digesters to ensure their effective operation in the future.