NC0074268_Permit Issuance_20110411

•
Beverly Eaves Perdue -
Governor
rin
=NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality -
Coleen H. Sullins - - Dee Freeman
Director Secretary
•
April 11, 2011
tarry Cummings; Division Manager of'Wastewatar Treatment-=
City of Gastonia -
P.O. Box 1748
Gastonia, North Carolina 28053 -
Subject: Issuance of Permit NC0074268
Crowders Creek WWTP
Gaston County
Class IV Facility
Dear Mr. Cummings:
Division of Water Quality (Division) personnel have reviewed and approved your application for
renewal of the subject permit. Ao iidingly, we are forwarding the attached NPDES discharge permit.
It is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency
dated October 15, 2007.
This renewed permit reflects the following changes from the previous permit:
• The limit and monitoring requirement for chromium have been removed, due to a lack of
reasonable potential to cause an exceedance of the water quality standard.
• The monitoring requirements for copper, zinc, and silver have been reduced to quarterly. This is
due to a lack of reasonable potential for these action -level pollutants to cause an exceedance of
water quality standards.
• Effluent limits for total nickel have been removed, and monitoring changed to quarterly, also due to
a lack of reasonable potential.
• In accordance with Division policy, limits for total mercury have been changed to 12 ng/L for a
monthly average and 36 ng/L for a daily maximum. Monitoring frequency was reduced to monthly.
You may request a minor modification to change the monitoring frequency to quarterly, following
12 consecutive months of sampling results below 12 ng/L.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
Ari Equal Opportunity 1 Affirmative Action Employer
NorthCarolina
• •Naturally

• Quarterly monitoring for bis(2-ethylhexyl)phthalate has been added. A sample result for this
pollutant was above the federal water quality criteria for human health. •
• Color requirements were removed. This includes all effluent and instream monitoring.
• A new footnote for total chlorine residual (TRC) was added, which allows sample results up to 50
pg/L to be considered in compliance with the limit. The footnote also indicates that the permittee
shall continue to record and submit all values reported by a North Carolina certified laboratory
even if these values fall below 50 pg/I.
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing upon written request within thirty (30) days
after receiving this letter. Your request must take the form of a written petition conforming to Chapter
150E of the North Carolina General Statutes, and must be filed with the Office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such demand is
made, this permit remains final and binding.
This permit is not transferable except after notifying the Division of Water Quality. The Division may
modify and re -issue, or revoke this permit. Please notice that this permit does not affect your legal
obligation to obtain other permits required by the Division of Water Quality, the Division of Land
Resources, the Coastal Area Management Act, or other federal or local governments.
If you have questions, or if we can be of further assistance, please contact Mr. Gil Vinzani at
[[e-mail]] or call [phone].
Sincerely, vit,i(
Coleen H. Sullins
Enclosure: NPDES Permit FINAL NC0074268
Cc: US EPA Region IV, Pamala Myers
Mooresville Regional Office, Surface Water Protection Section
Environmental Services Section, Aquatic Toxicology Unit, Susan Meadows*
NPDES Unit Files
Central Files
*E-mail Copy
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748 •
Internet: www.ncwaterquality.org
An Equal Opportunity \ Affirmative Action Employer
•
NorthCarolina
Naturally

Permit NC0074268
'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:complianceewith-the:.provision:of North Carolina:Ceneral Statute 143-215,1;other,lavvfufstandards ....
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
on South York Road 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 Paris I, II, III, and IV
hereof.
The permit shall become effective May 1, 2011.
This permit and the authorization to discharge shall expire at midnight on August 31, 2015.
Signed this day: April 11, 2011
o -en H: Sullins, Director -
4Diviaion'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:
Continue to operate an existing 6.0 MGD wastewater treatment facility that includes the following
components:
• Mechanical bar screen
• Grit removal_
• Influent�pump'station
• 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
• Dissolved air floatation (DAF) unit
• Four anaerobic 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
on South York Road 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.
Page 2

_Crowders . Creek _WWTP___— NC007.4268
USGS Quad Name: Gastonia South
Receiving Stream: Crowders Creek
Stream Class: C
Subbasin: Catawba 03-08-37
Lat.: 35°10'10"
Long.: 81 °11'48"
HUC: 03050101
City ,of Gastonia

Permit NC0074268
A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
�--During;the-period beginning on the effective= date of the'.permit-and-lasting-'until:texpiration-; the-permittee.
is_authorized to discharge from 'outfall 001. Such discharges shall -.be limited and monitored by -the, " -
Permittee as specified below: • -
EFFLUENT CHARACTERISTICS
: LIMITS:-
•- MONITORING. REQUIREMENTS
Monthly,
Average;.
'. Weekly
Average
Daily
Max.
;. Measurement.
Frequency =
, Sample.' .
, Type:,,
'2Sample '.
Location.
Flow
6.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C 2
13.0 mg/L
19.5 mg/L
Daily
Composite
I and E
Total Suspended Solids 2 •
30.0 mg/L
45.0 mg/L
Daily
Composite
I and E
NH3as N
(April 1 - October 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
E
NH3 as N
.(November.l — March-31)-
1_Q.0 rng/L
:, _.
30.0 mg/L
...
Dail Y "
Com o
P sites
.., _ _E.,. . _....
Dissolved Oxygen 3
Daily
Grab
E, U, D
Fecal Coliform a
(geometric mean)
200/100 ml
400/100
ml
Daily
Grab
E, U, D
Temperature
' Daily
Grab
E, U, D
pH
Between 6.0 and 9.0 s. u.
Daily
Grab
E
Total Residual Chlorine 5
g/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
Chronic Toxicity b _
..' _
. Quarterly _
Composite
E
Bis(2-ethylhexyl)phthalate
Quarterly
Grab
E
Total Mercury
0.012 fig/O.g36
Quarterly
Grab
E
Total Nickel
-
Quarterly
Composite
E
Total Copper
Quarterly
Composite
E
Total Zinc
Quarterly
Composite
E
Total Silver
Quarterly
Composite
E
Annual Pollutant Scan "
Annual
Composite
E
Notes:
1. U. Upstream at NCSR 1108. D. Downstream at a) NCSR 2424 and b) NCSR 564. Instream 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. The Division shall consider all effluent TRC values reported below 50 pg/I to be in compliance with the
permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina
certified laboratory (including field certified), even if these values fall below 50 pg/I.
6. Chronic Toxicity (Ceriodaphnia), P/F at 41 % with testing in March, June, September and December (see
condition A (2)).
7. The permittee may request a minor modification to change the monitoring frequency to quarterly, following •
.12 consecutive months with values below 0.012 pg/L. EPA Method 1631 shall be used in all analyses.
8. - See condition A (3). —
There shall be no discharge of floating solids or foam in other than trace amounts.
Page 3'�

A (2) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
:.
The effluent discharge ,shall at=no time: exhibit observable inhibition
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 II 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 dischargebelow all treatment processes.
Permit NC0074268
of reproduction or significant mortality:
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 thetwo
following rnonth`s as'desc"r'ibedin`'"North'Caroliria Phase 11 ChronicWhole-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 b.e entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter
code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3
(original) is to be sent to the following address:
Attention: 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.
•
Page 4

Permit NC0074268
A (3) EFFLUENT'POLLUTANT'SOAW t..
•
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 (Method 1631 E)
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
f ,Eth-ylbenzene
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 compounds:
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
Chrysene'
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
I ndeno(1,2,3-cd) pyrene
Isophorone
Naphthalene
Nitrobenzene
N-n itrosod i-n-p ropylam i n e
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
-Test-results-shalt-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. • •
Page 5
. s.

Veinzani, Gil
From: [e-mail]
Sent: Monday, February 14, 2011 10:09 AM
To: Vinzani, Gil; Belnick, Tom
Subject: Crowders Creek WWTP (NC0074268), City of Gastonia
Good morning Gil,
This email serves as your notice of "no comments" to the draft permit for the Crowders Creek WWTP
(NC0074268).
Thank you for the opportunity to review this draft permit. As always should substantial changes to this
document be made prior to issuance please allow Region 4 another opportunity for review.
If you require a more formal letter for your files I will be happy to provide one for you.
Sincerely,
Pamala Myers
Pamala Myers
404.562.9421
myers.pamala @ epa.dov
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch Water
Protection Division I Municipal and Industrial NPDES Section U.S. EPA, Region 4 I 61 Forsyth St. SW I
Atlanta, GA 30303

(TASTCNIA
Great Place. Great People. Great Promise.
Department of Public Works and Utilities
Wastewater Treatment Division
March 2, 2011
Mr. Gil Vinzani, PE
NPDES Program
Division of Water Quality
1617 Mail Service Center
Raleigh. NC 27699-1617
Re: Draft NPDES Permit
NC0074268 Crowders Creek WWTP
Dear Mr. Vinzani:
.P[NBWCE N
[MAR - 9 2011
DENR-WATER QUALITY
POINT SOURCE BRANCH
Thank you for sending us the draft of Crowders Creek WWTP's renewed NPDES permit.
We have reviewed this draft, and appreciate the thorough preparation and the changes
that were made in limits and monitoring frequencies following your data review. In
accordance with your request, we would like to submit the following comments for
potential modifications for the final permit:
• Effluent Channel: When the Crowders WWTP was built, a channel was
constructed from the discharge pipe to Crowders Creek. We would like this
designated as an effluent channel in the plant component listings to clear up any
possible confusion in the future.
• Trace Amounts of Foam or Solids: Our current permit contains a note on the
Effluent Limitations and Monitoring Page that "There shall be no discharge of
floating solids or visible foam in other than trace amounts". The wording in the draft
permit does not include the "in other than trace amounts" portion. We feel an
he/1 II to of I floating solids or visible foam is unreasonable and request
a..vVlUly restriction al a.11 J II.Av
the trace amounts qualification be included again.
• Monitoring Frequencies: The North Carolina Water Quality Alliance submitted a
February 22, 2011 letter to Mr. Jeff Poupart regarding the frequency of POTW
NPDES Permit Monitoring. We request that our permit monitoring for BOD, TSS,
ammonia -nitrogen, priority pollutants and whole effluent toxicity be evaluated in
regards to the concerns raised in that letter.
• General Conditions: We ask that the first sentence of Part II Section C Item II
Proper Operation and Maintenance be removed. That sentence reads "The
Permittee shall at all times provide the operation and maintenance resources
necessary for the operation of the existing facilities at optimum efficiencies."
aqa ONAL
ISO 14001 Certified
Pure and Clean for our Fields and Streams
PO Box 1748 • Gastonia, NC 28053-1748

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
CERTIFIED MAIL: 7009 0820 0001 5800 7391

NCDENR/DWQ
NPDES PERMIT FACT SHEET
City of Gastonia/ Crowders Creek WWTP
NC0074268
acili Informatio
.)facility Name:
(2) Permitted Flow
(3.) Facility Class:
(4.)Pretreat Program:
(5.) Permit Status:
Crowders Creek WWTP
(6.) County_- —
(7.) Regional Office:
(8.)USGSTopoQuad:
(9.)USGS Quad Map:
6.0 MGD
IN/
Full
Permit Renewal
Gaston
Mooresville
C14NW
Gastonia South
Characterlsl
(1.) Receiving Stream:
(2.) Sub -basin:
(3.) Str. Index Number:
_(4.)Str. Classification:
(5.) 303(d) Listed:
(6.) 10-digit HUC
Crowders Creek
03-08-37
11 -13 Vie)_
C ..
Yes; fecal coliform
10305010115
(7.) Drainage Area:
(8)Summer 7Q10:
(9.) Winter 7Q10 :
110 30Q2:
(11.) Average Flow:
(12.) IWC %:
`70.4mi2 r
13.3 CFS
20 CFS
28 CFS
82 CFS
42%
-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, Bessemer City, and Clover, SC. The City of
Kings Mountain is served only as an emergency connection. In addition Crowders
Creek WWTP also accepts waste from five significant industrial users (SIUs) and has a
full long term monitoring plan (LTMP). The largest of the SIU's is Carolina By -Products,
which processes poultry meal and feather meal. It contributes an average daily process
flow of 129,400 GPD.
Crowders Creek is listed on the 2010 Impaired Waters list for ecological/biological
integrity and for fecal coliform. Potential sources are urban runoff, industrial point
sources and storm sewers.
Compliance Summary
A report was extracted from BIMS to find all violations since January 2006. Therewas
only one; a dissolved oxygen violation in April 2007. There were no WET test violations
during this review period, and there were none during the last renewal period either
(since March 2001).
DMR Data Review
Flows averaged 2.3 MGD during 2010. This compares to an average of about 2.1 MGD
for 2008-2009.
DMRs were reviewed for the period of January 2008- October 2010. Monthly average
data for some conventional parameters is summarized in the Table 1. The facility is
currently averaging flows at 45% of their capacity with maximum average monthly flows
at 70% capacity.

NPDES Permit Fact Sheet
Page 2
Crowders Creek WWTP
NC0074268
Table 1. DMR Data 2008-2010
Average
0.50
1.92
8.93
5.04
0.245
Maximum
8.5
13.8
13.9
21
0.9
Minimum
<0.01
<0.01
6.3
0.6
D.1
Permit
Limit
2 (summer)
10 (winter)
30.0
> 6.0
6.0 (summer)
1.0
Instream data for color, dissolved oxygen, and conductivity were reviewed for the period
January 2008 to October 2010. A summary of monthly average data is included in the
following tables. All downstream DO values were greater than the water quality
standard. The discharge appears to be having minimal impact on the receiving stream.
Table 2. Instream Data 2008-2010
ADMI COLOR
UPSTREAM
DOWNSTREAM A
DOWNSTREAM B
2010
36.56
41.84 (+14%)
44.70 (+22%)
2009
39.23
48.52 (+24%)
47.78 (+22%)
2008
29.93
30.44 (+1.7%)
30.04 (+0.4%)
DISSOLVED OXY
UPSTREAM
DOWNSTREAM A
DOWNSTREAM B
2010
9.69
9.41 (-3.0%)
9.52 (-1.9%)
2009
9.45
9.16 (-3.1 %)
9.30 (-1.6%)
2008
9.43
8.97 (-4.9%)
9.09 (-3.6%)
CONDUCTIVITY
UPSTREAM
DOWNSTREAM A
DOWNSTREAM B
2010
167
178 (+28(3/0)
181 (+30%)
2009
168
199 (+18%)
209 (+24%)
2008
191
274 (+43%)
281 (+47%)
Color Review
As part of the permit application, the facility has requested that Tier I facility color permitting
requirements be removed. They pointed to the evidence of a very clear effluent since
January 2003 when the last of the textile dye housed moved from the area. A check of the
list of SIU's confirms that there are no textile dying facilities.
An analysis of the, upstream/downstream color monitoring results (top table) shows color is
only slightly higher downstream.. Since color is no longer a pollutant of concern, it was
decided to grant the facility's request and remove color monitoring requirements.
RP Analysis
RPAs were performed for all toxicant parameters monitored through the permit, the PPA
application data,and the pretreatment LTMP. Maximum predicted concentrations for the

NPDES Permit Fact Sheet
Page 3
Crowders Creek WWTP
NC0074268
following parameters were less than 50% of the allowable concentrations: arsenic,
beryllium, cadmium, chromium, total phenolic compounds, cyanide, lead, selenium, and
toluene.
Although there was no reasonable potential, maximum predicted concentrations for the
following were found to be over 50% of allowable concentrations: copper, nickel, silver,
and zinc. Quarterly monitoring was deemed appropriate for these parameters.
Regarding mercury, there was one hit above the 12 ng/L standard, from the sample
taken on March 29, 2010. Following recent guidelines and division policy, limits of 12
ng/L monthly average and 36 mg/L daily maximum were applied, with•a monthly
monitoring requirement. The permittee may request a minor modification to change the
monitoring frequency to quarterly following 12 consecutive months with sample results
below 12 ng/L.
The facility performed four priority pollutant analyses as part of the renewal application
requirements. The analyses reported four hits for chloroform but each was well below
the human health standard of 1.70 pg/L. Methyl Bromide and dichloromethane each had
one hit, but they were well below the EPA human health national criteria. Based on this
information, none of these can be considered a parameter of concern
There was one hit for bis (2-ethylhexyl) phthalate in the March 2007 PPA (14,ug/L),
which exceeds the EPA water quality criteria (2.2 pg/L) for this pollutant. Hits in the
sample results for this parameter may sometimes be shown to be due to laboratory
contamination. Quarterly monitoring was proposed for this parameter, to acquire more
data.
Permit Changes Summary
• The limit and monitoring requirement for chromium have been removed, due to
its lack of reasonable potential to cause an exceedance of the water quality
standard.
• The monitoring requirements for copper, zinc, and silver have been reduced to
quarterly. This is due to a lack of reasonable potential for these action -level
pollutants to cause an exceedance of water quality standards.
• Limits for nickel have been removed, and monitoring changed to quarterly, also
due to a lack of reasonable potential.
• Following Division policy, mercury monitoring was reduced from weekly to
monthly, and limits were changed to 12 ng/L monthly average and 36 mg/L daily
maximum.
• Quarterly monitoring for bis (2-ethylhexyl) phthalate has been added. A sample
result for this pollutant was above the federal water quality criteria for human
health.
• Color requirements were removed. This includes all effluent and instream
monitoring.
• A new footnote for total chlorine residual (TRC) was added, which allows
sample results up to 50 ,ug/L to be considered in compliance with the limit.
The footnote also indicates that the permittee shall continue to record and
submit all values reported by a North Carolina certified laboratory even if,
these values fall below 50,ug/I.

NPDES Permit Fact Sheet Crowders Creek WWTP
Page 4 NC0074268
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: February 2, 2011
Permit Scheduled to Issue: April, 2011
State Contact Information
If you have any questions on any of the above information or on the attached permit,
please contact Gil Vinzani at [phone] or at [e-mail].
Signature
Date
Aoril 6. 2011

' City of Gastonia Crowders Creek WWTP REASONABLE POTENTIAL ANALYSIS
NC0074268
Qw (MGD) = 6.00
1Q10S (cfs) = 11.00
7Q1OS (cfs) = 13.30
7Q1OW (cfs) = 20.00
30Q2 (cfs) = 28.00
Avg. Stream Flow, QA (cfs) = 82.00
Receiving Stream: Crowders Creek
WWTP/WTP Class: IV
IWC @ 1Q10S = 45.81%
IWC @ 7Q1OS = 41.15%
IWC @ 7Q1OW = 31.74%
IWC @ 30Q2 = 24.93%
IWC@QA= 10.19%
Stream Class: C
Outfall 001
Qw=6MGD
t
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
NC WQS / Applied t/2 FAV /
Chronic Standard
Acute
J
0
a
1-
z
REASONABLE POTENTIAL RESULTS
Max Pred
n # Det. Cw
Allowable Cw
Arsenic
Arsenic
Beryllium
Cadmium
C
C
NC
50 FW(7Q10s)
10 HH/WS(Qavg)
6.5 FW(7Q10s)
ug/L
ug/L
ug/L
45 1
45 1
4 0
Note: n<12
Limited data set
6.3
6.3
4.7
Default C.V.
Acute: NO WQS
- Chronic: 121.5
No value > Allowable Cw _ _
Chronic: 98.1
No value > Allowable Cw _
Acute: NO WQS
- Chronic: 15.8
No value > Allowable Cw
RECOMMENDED ACTION
Chlorldes (AL)
'Chlorinated Phenolic Compounds
Total Phenolic Compounds
Chromium
Copper (AL)
Cyanide
NC
NC
NC
NC
NC
NC
NC
2 FW(7Q10s) 15
230,000 FW(7Q10s)
1
A(30Q2)
300 A(30Q2)
50 FW(7Q10s) 1022
7 FW(7Q10s) 7
5 FW(7Q10s) 22
10
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
45 0
_ 0 0
0 0
4 0
Note: n<12
Limited data set
45 0
136 104
169 0
1.2
N/A
N/A
118.5
Default C.V.
1.0
10
5.0
Acute: 32.7
- Chronic: 4.9
No value > Allowable Cw
Acute: NO WQS
Chronic: 558,931
Acute: NO WQS
Chronic: 4.0
Acute: NO WQS
- Chronic: 1,203.4
No value > Allowable Cw
Acute: 2,231.0
- Chronic: 121.5
No value > Allowable Cw
Acute: 15.9 _
Chronic: -17.0
No value > Allowable Cw
Acute: 48.0
- Chronic: 12.2
No value > Allowable Cw
No RP, ' Predicted Max < 50% of Allowable Cw""-'
Monitoring; required
No RP , Predicted Max a 50% o1Allowable Cw
apply,Quarterly Monitoring
Page 1 of 2
RPA-Gastonia CC, rpa
4/6/2011

City of Gastonia Crowders Creek WWTP REASONABLE POTENTIAL ANALYSIS
NC0074268
Outfall 001
Qw = 6 .MGD
Fluoride
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver (AL)
Zinc (AL)
Toluene
Bis(2-ethylhexyl) phthalate
NC
NC
NC
NC
NC
NC
NC
NC
NC
C
1800 FW(7Q10s)
25 FW(7Q10s) 33.8
12 FW(7Q10s)
160 WS(7Q10s)
25 WS(7Q10s) 261
5 FW(7Q10s) 56
0.06 FW(7Q10s) 1.23
50 FW(7Q10s) 67
11 FW(7Q10s)
2.2 HH(Qavg)
0.5
ug/L
ug/L
ng/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
0 0
45 0
185 185
41 17
151 151
44 1
112 0
123 123
19 2
4 1
Note: n<12
Limited data set
0 0
0 0
N/A
1.0
18.6
202.8
57.7
3:0
1.060
85.5
5.55000
66.36000
Default C.V.
N/A
N/A
Acute: NO WQS
- Chronic: 4,374.2
Acute: 73.8
- Chronic: 60.8
No value > Allowable Cw
Acute: NO WQS.
- Chronic: 29.2
No value > Allowable Cw
Acute: NO WQS
Chronic: 388.8
No value > Allowable Cw
Acute: 569.7
- Chronic: 60.8
No value > Allowable Cw
Acute: 122.2
- Chronic: 12.2
No value > Allowable Cw
Acute: 2.685
Chronic: 0.146
112 value(s) > Allowable Cw
Acute: 146.3
- Chronic: 121.5
No value > Allowable Cw
Acute: NO WQS
- Chronic: 26.73147
No value > Allowable Cw
Acute: NO WQS
Chronic: 21.58979
No value > Allowable Cw
Acute:
Chronic:-----------
Acute:
Chronic:
Apply 12/36 limds with monthly monitoirng
No RP Predicted Max a50°%oofAllowable=Cw
apply Quarterly Monitoring ...4.
RP for Limited Dataset (n<B samples} apply
Quarterly; Monitoring
Page 2 of 2
RPA-Gastonia CC, rpa
4/6/2011

REASONABLE POTENTIAL ANALYSIS
Date
07/10/2009
08/07/2009
09/04/2009 .<
10/02/2009
11 /06/2009
12/04/2009
01/08/2010
'02/05/2010
03/05/2010
03/12/2010
04/09/2010
05/07/2010
06/04/2010
' 07/02/20'10
08/06/2010
09/03/2010
10/08/2010
' , 6/1/2006
7/1/2007
9/1/2008
12/1/2009
7/6/2007
8/3/2007
9/7/2007
;. 10/5/2007
1'1/2/2007
12/7/2007
1/4/2008
2/1/2008
3/7/2008
4/4/2008
5/2/2008
6/6/2008
7/3/2008,
8/1/2008
9/5/2008
9/26/2008
10/3/2008
11/7/2008
12/5/2008
1/2/2009..
Arsenic - FW Standard
Data
BDL=1/2DL Results
2 1 Std Dev.
2 1 Mean
2 1 C.V.
2 1 n
4.1 4.1
1 Mult Factor =
1 Max. Value
1 Max. Pred Cw
1
1
1
1
1
1
1
1
1
1
1
1
1
:USE:ONLY;.
FASTS b
SPECIA4'
VaCues W IZHn
a
0.4621
1.0689
0.4323
45
1.53
4.1 ug/L
6.3 ug/L
2
Arsenic - HH/WS Standards
Date Data BDL=1/2DL Results
1 07/10/2009 < 2 1 Std Dev.
2 08/07/2009 < 2 1 Mean
3 09/04/2009 < 2 1 C.V.
4 10/02/2009 < 2 1 n
5 11/06/2009 0 4.1 4.1
6 12/04/2009 < 2 1 Mult Factor =
7 01/08/2010 < 2 1 Max. Value
8 02/05/2010 < 2 1 Max. Pred Cw
9 03/05/2010 < 2 1
10 03/12/2010 < 2 1
11 04/09/2010 < 2 1
12 05/07/2010 < 2 1
13 06/04/2010 < 2 1
14 07/02/2010 < 2 1
15 08/06/2010 < 2 1
16 09/03/2010 < 2 1
17 10/08/2010 < 2 1
18 6/1/2006 < 2 1
19 7/1/2007 < 2 1
20 9/1/2008 < 2 1
21 12/1/2009 < 2 1
22
23 7/6/2007 < 2 1
24 8/3/2007 < 2 1
25 9/7/2007 < 2 1
26 10/5/2007 < 2 1
27 11/2/2007 < 2 1
28 12/7/2007 < 2 1
29 1/4/2008 < 2 1
30 2/1/2008 < 2 1
31 3/7/2008 < 2 1
32 4/4/2008 < 2 1
33 5/2/2008 < 2 1
34 6/6/2008 < 2 1
35 7/3/2008 < 2 1
36 8/1/2008 < 2 1
37 9/5/2008 < 2 1
38 9/26/2008 < 2 1
39 10/3/2008 < 2 1
40 11/7/2008 < 2 1
41 12/5/2008 < 2 1
42 1/2/2009 < 2 1
4P-11:5 SECTION,
0.4621
1.0689
0.4323
45
1.53
4.1 ug/L
6.3 ug/L
RPA-Gastonia CC, data
- 1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Date
6/1/2006
7/1/2007
9/1/2008
12/1/2009,
Data
Beryllium
BDL=1/2DL Results
2 1 Std Dev.
2, 1 Mean
2, 1 C.V. (default)
1 n
Mult Factor =
Max. Value
Max. Pred Cw
0.0000
1.0000
0.6000
4
4.74
1.0 ug/L
4.7 ug/L
4
Date
1 07/10/2009
2 -08/07/2009
3; 09/04/2009
4f 10/02/2009
5 11/06/2009
6' 12/04/2009
7
8
9
10
11
12, 05/07/2010
13 i '06/04/2010
14? 07/02/2010
15' 08/06/2010
16: 09/03/2010
171 10/08/2010
18; 6/1/2006
19! 7/1/2007
20 9/1/2008
21, 12/1/2009
22/
23. 7/6/2007
24' 8/3/2007
25 9/7/2007
261 10/5/2007
27. 11/2/2007
28i 12/7/2007
'29i 1/4/2008
30' 2/1/2008
31 3/7/2008
321 4/4/2008,
331 5/2/2008
34' 6/6/2008
35, 7/3/2008
361, 8/1/2008
37 9/5/2008
38i 9/26/2008
39 10/3/2008
40! 11/7/2008
Cadmium
Data BDL=1/2DL Results 3"/',GOPY1
2 1 Std Dev. 0.1439
2' 1 Mean 0.9556
2; 1 C.V. 0.1506
2 1 n 45
2' 1
2 1 MultFactor = 1.17
01/08/2010 < 2 1 Max. Value 1.0 ug/L
02/05/2010 r2; 2 1 Max. Pred Cw 1.2 ug/L
03/05/2010 ; 2; 1
03/12/2010 *< 2 1
04/09/2010 < 2 1
2 1
2 1
2 1
2, 1
2 1
1
14 0.5
1€ 0.5
0.5
1 0.5
, 2t 1
2 1
2 1
2, 1
2E 1
2i 1
1
2 1
2 1
2; 1
2 1
2, 1
2; 1
1
1
1
1
1
2`
2
2'
-1-
RPA-Gastonia CC, data
1/25/2011

REASONABLE POTENTIAL ANALYSIS
Total Phenolic Compounds
Date Data BDL=1/2DL Results
6/1/2096 ` <, 50' 25 Std Dev.
.7/1/2007 � . 50! 25 Mean
9/1/2008: 25 C.V. (default)
12/1/2009 r< 50. 25 n
Mult Factor =
Max. Value
Max. Pred Cw
0.0000
25.0000
0.6000
4
4.74
25.0 ug/L
118.5 ug/L
8
Date Data
1 . 07/10/2009 7-1
2 108/07/2009
31' 09/04/2009'
41 10/02/2009
5, 11/06/2009
6; 12/04/2009
73 '01 /08/2010
8 ,r,,02/05/2010
91, ,03/05/2010
10, 03/12/201:0
11 04/09/2010
12:1, 05/07/2010
13 06/04/2010
14 '07/62/2010;
15: 08/06/2010 d
16i '09/03/2016
177 10/08/2010
181 1 6/1/2006
19;,
20 9/1/2008
211 12/1 /2009'
22; ,
231 .7/6/2007
24; 8/3/2007 ci „ 2;
251; 9/7/2007,
26 _. 10/.5/2007,
271 , .11/2/2007'
28;112/7/2007,
29! 1 /4/2008
:2/1/2008,
31;1„ 3/7/2908
32' 4/4/2008 < '21
33; ` 5/2/2608 2j
34:, 6/6/2608 - :2:;
351 7/p/200,8
36F 8/1/2008
37, , 9/5/2008
38! t,9/26/2008,_
39 10/3/2008 2`
40. 11/7/2008 , 2E
41 " 12/5/2008
Chromium
BDL=1/2DL . Results
2 1 Std Dev.
2' 1 Mean
2: 1 C.V.
1 n
1
2. 1 Mult Factor=
1 Max. Value
1 Max. Pred Cw
1
1
1
1
1
1
1
1
1
1
1
1
1
2',
2,
2
2i
2'
0.0000
1.0000
0.0000
45
1.00
1.0 ug/L
1.0 ug/L
RPA-Gastonia CC, data
- 1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Copper (AL)
BDL=1/2DL Results
7.9 7.9 Std Dev.
2 1 Mean
4.2 4.2 C.V.
2.2 2.2 n
2 1
2.8 2.8 Mult Factor =
3.9 3.9 Max. Value
2 1 Max. Pred Cw
2 1
2 1
2 1
2 1
2 1
2 1
2 1 e
2 1
2 1
2 1
2 1
2 1
2 ' 1
2 1
2 1
2.6 2.6
2.4 2.4
2 1
2 1
2.6 2.6
2 1
2 1
2.1 2.1
2.9 2.9
2 1
2 1
2 1
3.8 3.8
2 1
3.5 3.5
2.7 2.7
3.2 3.2
3.8 3.8
0.8917
2.0875
0.4272
136
1.22
7.9 ug/L
9.6 ug/L
10
Date
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''
Data
Cyanide
BDL=1/2DL Results
10 5 Std Dev.
10` 5 Mean
10. 5 C.V.
"10 5 n
10 5
10 5 Mult Factor =
10! 5 Max. Value
10 5 Max. Pred Cw
10 5
105
10 5
10' 5
'10 5
10' 5
10 5
10 5
=10 5
10; 5
10 5
10t 5
10, 5
5
10' 5
10 5
16 5
'10 5
10- 5
16 5
10€ 5
10: 5
5
TO 5
„10 5
TO 5
10 5
5
10 5
1o) 5
10; 5
10 5
210 5
0.0000
5.00
0.0000
169
1.00
5.0 ug/L
5.0 ug/L
RPA-Gastonia CC, data
- 1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Lead
Date Data BDL=1/2DL Results
07/10/2009 < - ,2- 1 Std Dev. 0.0000
08/07/2009 < 2: 1 Mean 1.0000
09/04/2009 <d 2 1 C.V. 0.0000
' 10/02/2009 ' <; 2 1 n 45
11/06/2009'< 2: 1
' 12/04/2009 ` < 2 1 Mult Factor = 1.00
01/08/2010 2 1 Max. Value 1.0 ug/L
' 02/05/2010 ; <° 2 1 Max. Pred Cw 1.0 ug/L
03/05/2010 <3 2 1
03/12/2010 < 2'. 1
' 04/09/2010 ` <_ ' 2, 1
' 05/07/2010' < 2 1
06/04/2010 21 1
07/02/2010 - <; • 2 1
' 08/06/2010 -2= 1
09/03/2010" ¢. 2# 1
10/08/2010 < 2 1
6/1/2006 c{ ` , 1
2, 1
9/1/2008 < 2 1
12/1/2009 < 2, 1
1
' 7/6/2007 21 1
8/3/2007 . 4 ` 2
1'',8/7/2007
10/5/2007
11/2/2007
. 5 2/7/200'7
1/4/2008 < 2= 1
,' 2/1/2008 , , `2i 1
3/7/2008 `c, 2 1
' - 4/4/2008 . 1
5/2/2008 & �s"2 1
6/6/2008 . 2i 1
7/3/2008 - <; 2k 1
8/1/2008 < 2 1
a 9/5/2008 ` <_ 2 1
9/26/2008. + <i ' ' - ' 2 1
10/3/2008 < . ' 2 1
",11/7/2008, ' �; z 1
"12/5/2008 `t, 2F 1
13
4
5
6
7
8
9."
10
11
12
13,
14
15;
16 oa
17
18'.
Date
Mercury
Data BDL=1/2DL
3.05, 3.05
3.66' 3.66
4 08,
8 66
306'
4.68
5.31
8.72
814`
3.44,
•
4.44'
2.76'•
1.9
Results
Std Dev.
Mean
C.V.
4.08 n
8.66
3.06 Mult.Factor =
4.68''Max. Value
5.3 Max. Pred Cw
8.72
8.14
3.44
4.44
2.76
1.9
'56' 1.56
1;611.61
2,78: 2.78
20' 3.26' 3.26
B ;
21; , . `1.94 1.94
22 1.72 1.72
23. 1 48. 1.48
24;, � °3.411, 3.41
25;
26 2 54,. 2.54
27! ,1.96t 1.96
28 2.45" 2.45
29' ° 1.84`. 1.84
30 , 1.75` 1.75
31,'
321,
33:' .2.42 2.42
2.21. 2.2
35 ` 1,21 1.2
36 `= 1.02. 1.02
37, 1:45' 1.45
38 t:58: 1.58
39'' 13� 1.3
40: , ` �. 1° 1
41'" ,
asri
PEC14`
1.8209
2.8524
0.6384
185
•
RPA-Gastonia CC, data
- 1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Date Data
07/10/2009
08/07/2009
09/04/2009
10/02/2009
11/06/2009
12/04/2009
01/08/2010
02/05/2010
03/05/2010
03/12/2010
04/09/2010
05/07/2010
06/04/2010
07/02/2010
08/06/2010
09/03/2010
10/08/2010
7/6/2007
8/3/2007
9/7/2007
10/5/2007
11/2/2007
12/7/2007
1/4/2008
' 2/1/2008
3/7/2008'
4/4/2008
5/2/2008
6/6/2008
7/3/2008
8/1/2008
9/5/2008'
9/26/2008
10/3/2008
1'1/7/2008
12/5/2008
1/2/2009
-3/6/2009
4/3/2009
5/1/2009
6/5/2009
Molybdenum
2
2
2
2,
52.8i
2,
2:
2
2.
2_
24.9
13.6;
23.8,
14.2
4.11
2.8;
2.6
a41
4.4i
3.2
5€
6.8;
4.7:
8.1•
2,
2
2
2
2
2'
2
BDL=1/2DL
1
1
1
1
1
52.8
1
1
1
1
1
1
1
1
1
1.8
1.4
24.9
13.6
23.8
14.2
4.1
2.8
2.6
3.4
4.4
3.2
5
6.8
4.7
8.1
1
1
1
1
1
1
1
1
1
1
Results
Std Dev. 9.5267
Mean 4.9171
C.V. 1.9375
n 41
Mult Factor =
Max. Value
Max. Pred Cw
3.84
52.8 ug/L
202.8 ug/L
15
Date
1
2
3
4,
5:
61�ry
7j
8'
9
10
11:
12; .. •_
13 :-
14
15'
16
17
18
19
20'
21
22i
23.
24
25';
261
271
281',
29 i
30',
31
32;
331
34'
351
36
37,
38,
39'.
40'
41„
42'
Nickel
Data BDL=1/2DL
9.2, 9.2
41.5 41.5
21.5' 21.5
33.3 ,
26.7'
15.8,
10
8.8
9.1
5.5,
5.5:
4.6
11.6'
5.3;
2.7'
3.4:
3.7.
3,2!
3.3
3.7
3.8
3
4.4'
3.7
3.2'
4.3;
3.8'
3.1i
3.2'.
3.6'
3:2;
4.2;
3.71
3.4
. 3.6
3.7'
V
33.3
26.7
15.8
10
8.8
9.1
5.5
5.5
4.6
11.6
5.3
2.7
3.4
3.7
3.2
3.3
3.7
3.8
3
4.4
3.7
3.2
4.3
3.8
3.1
3.2
3.6
3.2
4.2
3.7
3.4
3.6
4
3.7
Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
5.0889
5.9967
0.8486
151
1.39
41.5 ug/L
57.7 ug/L
RPA-Gastonia CC, data
-1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
16
Date
1 07/10/2009
2 08/07/2009
3: 09/04/2009
4' 10/02/2009
5`- 11/06/2009
6'12/04/2009
7 0,1/08/2010
8. 02/05/2010
9;'03/05/2010
10' 03/12/2010
11 04/09/2010
12 05/07/2010
13 06/04/2010
14 07/02/2010
15' 08/06/2010
16 09/03/2010
17; 10/08/2010
18, 6/1/2006
19'
20;..9/1/2008
21 12/1/2009
22'
23' 7/6/2007
24. 8/3/2007
251 9/7/2007
26 „r 10/5/2007
27;' 11/2/2007
28 :12/7/2007
29 ` 1/4/2008
30 2/1/2008
31 3/7/2008
32' -4/4/2008
33 t 5/2/2008
34`.' 6/6/2008
35' 7/3/2008
36, 8/1/2008
371, 9/5/2008
38. 9/26/2008
39 10/3/2008
401 11/7/2008
41 ; 12/5/2008
Selenium
BDL=1/2DL Results
2 1 Std Dev.
2.4 2.4 Mean
2, 1 C.V.
2, 1 n
2 1
2� 1 Mult Factor =
2' 1 Max. Value
2; 1 Max. Pred Cw
2, 1
2 1
2 1
2 1
1
1
1
1
1
1
2,
2
2
0.2111
1.0318
0.2045
44
1.23
2.4 ug/L
3.0 ug/L
17
Date
1 6/1/2006
2 7/1/2007
3 9/1/2008
4, 12/1/2009
5
6'
7,
8
9
10'
11:
12'„
13"
14:
15',
16,
17
18'
19
20i
21'
22
23,
24
25:
26.,
271
28;
29!
30',
31
32,
33,
34!
35,
36:
37,
38
39
40
41:
Silver (AL)
Data BDL=1/2DL Results
2 1 Std Dev.
2' 1 Mean
2 1 C.V.
1 n
1 Mult Factor =
1 Max. Value
1 Max. Pred Cw
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0.0932
0.9821
0.0949
112
1.06
1.000 ug/L
1.060 ug/L
RPA-Gastonia CC, data
-1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Date
Data
Zinc (AL)
BDL=1/2DL Results
44 44 Std Dev.
Mean
70.9 70.9 C.V.
54.4 54.4 n
50.4€ 50.4
65 3, 65.3 Mult Factor =
51.4 51.4 Max. Value
37` 37 Max. Pred Cw
32.3. 32.3
34.8 34.8
35.6: 35.6
32.8' 32.8
32 32
34.4. 34.4
53.4, 53.4
41.7= 41.7
46: 46
38.2: 38.2
49.6, 49.6
34.8 34.8
39.61 39.6
351 35
37"i91 37.9
55.7 55.7
49.1 49.1
53.1 < 53.1
40.8. 40.8
53,4
731
60.2
43.8=
53.4
73.1
60.2
43.8
11.7083
40.1870
0.2913
123
1.17
73.1 ug/L
85.5 ug/L
19
Date
2
3
4,
5,
6
71
8,Jan. 6 2006
9 6/1/2006
10
11 9/1/2008 ,<
12i 12/1/2009.
13!
14' 7/6/2007
15! 10/5/2007
16 1/4/2008
17, 4/4/2008
18. 7/3/2008
19' 10/3/2008
201. 112/2009
21 4/3/2009 ,
221
23'
24:
25:
26
28;
29'
30 i
31
321
33''
34;
35
36,
37.
38
39..
40
41;`'
Data
Toluene
BDL=1/2DL Results
2 1, 2.1 Std Dev.
0.5 Mean
1 C.V.
0.5 n
1.1
0.5 Mult Factor =
0.5 Max. Value
0.5 Max. Pred Cw
0.25
2.5
0.5409
0.9711
0.5570
19
2.22
2.500000 ug/L
5.550000 ug/L
RPA-Gastonia CC, data
- 1 - 1/25/2011

REASONABLE POTENTIAL ANALYSIS
Bis(2-ethylhexyl) phthalate
Date Data BDL=1/2DL
6/1/2006 ,4 .. '- 10'
7/1/2007 14.
9/1/2008 < 10
12/1/2009 < 11.
5
14
5
5.5
Results
Std Dev.
Mean
C.V. (default)
n
4.4230
7.3750
0.6000
4
Mult Factor = 4.74
Max. Value 14.000000 ug/L
Max. Pred Cw 66.360000 ug/L
RPA-Gastonia CC, data
1/25/2011

North Carolina ) ss
Mecklenburg County)
The Charlotte Observer Publishing Co.
Charlotte, NC
Affidavit of Publication
THE CHARLOTTE OBSERVER
DINA SPRINKLE
NCDENR/DWQ/POINT SOURCE BRANCH
1617 MAIL SERVICE CENTER
RALEIGH NC 27699
REFERENCE: 30063432
6543172 notice of intent
Before the undersigned, a Notary Public of said
County and State, duly authorized to administer
oaths affirmations, etc., personally appeared,
being duly sworn or affirmed according to law,
doth depose and say that he/she is a
representative of The Charlotte Observer
Publishing Company, a corporation organized and
doing business under the laws of the State of
Delaware, and publishing a newspaper known as The
Charlotte Observer in the city of Charlotte,
County of Mecklenburg, and State of North Carolina
and that as such he/she is familiar with the
books, records, files, and business of said
Corporation and by reference to the files of said
publication, the attached advertisement was
inserted. The following is correctly copied from
the books and files of the aforesaid Corporation
and Publication.
PUBLISHED ON: 02/05
AD SPACE: 80 LINE
FILED ON: 02/10/1
NAME:
In
TITLE:
DATE:
Testimony Whereof I have hereunto set my hand and affixed my seal, the
North Public Notice
Carolina Environmental Management
Commission/NPDES Unit
1617 Mail Service Center
Notice of Intent al issue a 27699-1617
The
North Carolina Environmental
Wastewater Permit
I
to issue a NPDES steal Management n (s) listed below, wastewater discharge Comririssio
Written ge permit to the
d
' The Di ector or the day va, fterments gththe e P bj,sh d t permit th, will be
a public o, of C Drvrsioo of Water date W this notice. a interest. Pease should there be a Quality (eWQ) Of h
at abovemail comments and/or significant degree u s Old
DWQ the Salisbury address. Interested information requests
at Additional ry Street, Raleigh NC to persons
may visit rmati sts on
be.found itional information on NPDES'ea nd inform Day n
e ! al en or, or bysite. http://portcden permits notice may
Signod USA Incr, r calling [phone], /web/wq/swP/Ps/
S US , kilheread GWRrC al noCountyrt th 004260 for
Catawba istreatedBasin. wastewater t Perrrreeh
RCodiG Inc requested o Crowders Creek,
IncGfacilityd GW Gast 0 County; 0 this
fore permitted Catawbdischarge is
River treate R wastewater to Crowderper reek
The Town of Gastonia re s Creek,
the Crowds Quested renewal
discharge e 6.0 M k WWTp in Gas onof permit T is permitted
efor
d Creek in the Catawba River Basin.treated nlCiPal wastewater
hto Crow fitted
LP6543172ders
day and dear aforesaid.
Not
My Commission Expires: _/_/_
My Commission Expires May 27, 2011

P-16.”
crtzii//
NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form
PERMIT WRITER COMPLETES THIS PART:
PERMIT WRITERS - AFTER you get this form
Check
back from PERCS:
all that apply
Notify PERCS if LTMP/STMP data we said should
Date of Request
10/28/2010
municipal renewal
X
be on DMRs is not really there, so we can get it for
Requestor
Gil Vinzani
new industries
you (or NOV POTW).
Facility Name
City of Gastonia Crowder
Ck expansion
- Notify PERCS if you want us to keep a specific -
Permit Number
NC0074268
Speculative limits
POC in LTMP/STMP so you will have data for next
Region
Mooresville
stream reclass.
permit renewal.
- Email PERCS draft permit, fact sheet, RPA.
Basin
Catawba
stream relocation
- Send PERCS paper copy of permit (w/o NPDES
7Q10 change
boilerplate), cover letter, final fact sheet. Email RPA
other
if changes.
other
check applicable
PERCS staff: -
Other Comments to
PERCS:
x
CTB, CHO, LUM, NEW, ROA - Dana Folley (523)
HIW, LTN, NEU, YAD - Monti Hassan (371)
BRD, CPF, FRB, TAR - Sarah Morrison (208)
PERCS
Status of
PRETREATMENT STAFF COMPLETES THIS PART:
Pretreatment Program (check all that apply)
)-facility-has ne )ts; does have Division Pretreatment Program
that is INACTIVE
approved
-
21-faeility- as*n©-Sllks., does not have Division approved Pretreatment
Program
I/
3) facility has Sills and DWQ approved Pretreatment Program (list "DEV"
if program still under development)
te"-
3a) Full Program with LTMP
l
lb-)=Modified.Progr-am*with STMP
4) additional conditions regarding Pretreatment attached or listed below
S�,,TIGIIPime<frame: "
,09
o t'rg6erj
1/ / /
Flow, MGD
Permitted
Actual
Time perio for Actual
ext ccle:
V _________'""-
Industrial
467 - 3
07
(� i
L
Uncontrollable
n/a
a
GEC utA,R 1/e t
POC in
LTMP/
STMP
Parameter of
Concern (POC)
Check List
POC due to
NPDES/ Non-
Disch Permit
Limit
Required
by EPA*
Required
by 503
Sludge**
POC due
to SIU***
POTW POC
(Explain
below)****
STM
Effl
nt
eq
LTMP
Effluent
U
)
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V
BOD
v
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Q M•
✓
TSS
v
VQ
M
Q = Quarteriy-
v
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V
V
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Q M I
M = Monthly
V
Arsenic °
V4,
Q M
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'�
4v
V4
Q M
4
Chromium
4�4
Q M
al
Coppery .; ;`'',
4
v
✓
Q M
✓
Cyanide g
V
t/
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Q M
all data on DMRs?
4
Lead .�'`"
4
✓
✓
/4
Q M
YES
V
Mercury e
v'
v
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Q M
NO (attach data)
Molybdenum A
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✓
1 Q M
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Nickel-:
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4
Q M `
V
Selenium
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✓
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data in spreadsheet
/
Total Nitrogen �
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Q M
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1/
Phosphorus
V
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V
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*Always ili the LTI1(1P/STMP \ ** Only in LTMP/STMP if sludge land ;-pp or compos e (dif POCs for incinerators)
* Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer (ex., explanation of any POCs; info you have on IU related investigations into NPDES problems):
Pretreatment request form)
Revised: July 24, 2007

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City of Gastonia Crowders Creek WWTP EFFLUENT
Cd Cr Pb As Mo Se Toluene
ug/L ug/L ug/L ug/I ug/I ug/L UG/L
07/10/2009 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 2.1
08/07/2009 <2.0 <2.0 <2.0 <2.0 <2.0 2.4
09/04/2009 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
10/02/2009 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <1.0
11/06/2009 <2.0 <2.0 <2.0 4.1 <2.0 <2.0
12/04/2009 <2.0 <2.0 <2.0 <2.0 52.8 <2.0 <2.0
01/08/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
02/05/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
03/05/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
03/12/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
04/09/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
05/07/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
06/04/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
07/02/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
08/06/2010 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0
09/03/2010 <1.0 <1.0 <1.0 <1.0 1.8 <1.0
10/08/2010 <1.0 <1.0 <1.0 <1.0 1.4 <1.0
<1.0
1.1
<1.0
<1.0
Total *16.0 *16.0 *16.0 *19.1 *70.0 *17.4 *6.2
Avg. *0.9 *0.9 *0.9 *1.1 *4.1 *1.0 *0.9
Min. *0.5 *0.5 *0.5 *0.5 *1.0 *0.5 *0.5
Max. *1.0 *1.0 *1.0 *4.1 *52.8 *2.4 *2.1
Std. Dev.

Eff
Eff
Eff
Eff
Eff
Eff
Eff
Cd
Cr
Pb
As
Mo
Se
Toluene
ug/L
ug/L
ug/L
ug/1
ug/1
ug/L
ug/1
7/6/2007
<2.0
<2.0
<2.0
<2.0
24.90
<2.0
<1.0
8/3/2007
<2.0
<2.0
<2.0
<2.0
13.60
<2.0
9/7/2007
<2.0
<2.0
<2.0
<2.0
23.80
<2.0
10/5/2007
<2.0
<2.0
<2.0
<2.0
14.20
<2.0
<1.0
11/2/2007
<2.0
<2.0
<2.0
<2.0
4.10
<2.0
12/7/2007
<2.0
<2.0
<2.0
<2.0
2.80
<2.0
1/4/2008
<2.0
<2.0
<2.0
<2.0
2.60
<2.0
<1.0
2/1/2008
<2.0
<2.0
<2.0
<2.0
3.40
<2.0
3n/2008
<2.0
<2.0
<2.0
<2.0
4.40
<2.0
4/4/2008
<2.0
<2.0
<2.0
<2.0
3.20
<2.0
<1.0
5/2/2008
<2.0
<2.0
<2.0
<2.0
5.00
<2.0
6/6/2008
<2.0
<2.0
<2.0
<2.0
4.80
<2.0
- 7/3/2008
<2.0
<2.0
<2.0
<2.0
5.00
<2.0
<1.0
8/1/2008
<2.0
<2.0
<2.0
<2.0
6.80
<2.0
9/5/2008
<2.0
<2.0
<2.0
<2.0
4.70
<2.0
9/26/2008
<2.0
<2.0
<2.0
<2.0
8.10
<2.0
10/3/2008
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<1.0
11n/2008
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
12/5/2008
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
1/2/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<1.0
2/6/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
3/6/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
4/3/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
<1.0
5/1/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
6/5/2009
<2.0
<2.0
<2.0
<2.0
<2.0
<2.0
City of Gastonia Crowders Creek WWTP
WWTP Removal Rates
Page 1 of 1

NC 2010 Integrated Report Categories 4 and 5 Impaired Waters
Ail 13,123 LJaters in NC are in Category 5 303(d) C.ist for 114ercdare to statewvi
AU_Number AU_Name
Category Parameter
AU_Description
Reason for Rating
Catawba River Basin
e 11-135c Crowders Creek
5 Ecological/biological Integrity Benthos
constamption advice tor several fish species
LengthArea AU_Units Classification
Use Category Collection Year 303(d)yetar
Lake Wylie -Catawba River Watershed 0305010115
From State Route 1122 to State Route 1131 3.3 FW Miles C
Fair Bioclassification Aquatic Life
2002 1998
5 Ecological/biological Integrity FishCom
Poor Bioclassification Aquatic Life
2004 1998
e 11-135d Crowders Creek
5 EcologicaUbiological Integrity FishCom
From State Route 1131 to State Route 1108 7.3 FW Miles C
Fair Bioclassification Aquatic Life
2007 1998
Q 11-135e Crowders Creek
5 Ecological/biological Integrity Benthos
From State Route 1108 To NC 321 1.5 FW Miles C
Fair Bioclassification Aquatic Life
1989 2000
4t Fecal Coliform (recreation)
Standard Violation Recreation 2008 2000
Q 11-135f Crowders Creek
5 Ecological/biological Integrity Benthos
From State Route 321 to State Route 2424 1.4 FW Miles C
Fair Bioclassification Aquatic Life
1989 2000
4t Fecal Coliform (recreation)
Standard Violation Recreation 2008 2000
Q 11-135-2 McGiII Creek
From source to Crowders Creek 3.3 FW Miles C
5 Ecological/biological Integrity Benthos Poor Bioclassification Aquatic Life
1989 1998
Q 11-135-10-1 South Crowders Creek
5 Low Dissolved Oxygen
From source to South Fork Crowders Creek 5.7 FW Miles C
Standard Violation Aquatic Life 2008 2010
Q 11-135futl UT to Crowders Creek
4t Fecal Coliform (recreation)
From source to Crowders Creek 4.6 FW Miles
Standard Violation
Recreation 2008
NC 2010 Integrated Report Category 4 and 5 303(d) List EPA Approved Aug 31, 201 9/20/2010 Page 24 of 145

SOC PRIORITY PROJECT: Yes_ No X
To: Western NPDES Program Unit
Surface Water Protection Section
Attention: Dina Sprinkle
Date: March 30, 2010
NPDES STAFF REPORT AND RECOMMENDATION
County: Gaston
Permit No. NC0074268
PART I - GENERAL INFORMATION
1. Facility and address: Crowders Creek WWTP
City of Gastonia
Post Office Box 1748
Gastonia, North Carolina 28053-1748
2. Date of investigation: March 25-2010
3. Report prepared by: Samar Bou-Ghazale, Env. Engineer II
4. Persons contacted and telephone number: Mr. David Shellenbarger, Public works Assistant
Manager, 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.
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.
a
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 20 feet wide H 2-3 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: The City obtained an A to C No. 074268A02 in
2008 to improve the RAS pumping at the facility. The project included replacement
of a motor for RAS pump # 13 and replacement of a motor and pump for RAS pump
# 14. The project included also the installation of two scum boxes and chopper re-
circulating pumps to transfer scum from the final clarifiers to the waste sludge wet
well. In February 2009, the City obtained an A to C No. 074268A03 for the
installation of an additional mechanical bar screen (rated for 12 MGD peak flow) at
the facility.
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 stations, 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, effluent
sampler, two (2) caustic tank, one alum tank, one sugar tank, and 3 back-up generators.
f. Please provide a description of proposed wastewater treatment facilities: installation
of an additional mechanical bar screen (rated for 12 MGD peak flow) at the facility.
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: EMA Resources, Inc.
Telephone No.: [phone].
b. Residuals stabilization: PSRP

Page Three
c. Landfill: Waste from the grit chamber and bar screen are removed by Waste Management
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
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 is applying for a Peiniit renewal for the subject facility. The WWTP
appeared in good operational condition. Also, the City of Gastonia is in compliance with its
pretreatment program.
The City of Gastonia requests the following modification to the peilnit:
a- Removal of the Tier III facility color permitting requirements.
The City's explanation for the removal of Tier III is that the last textile dye house left in 2003 and
the effluent has been very clear since 2003.
b- Reduction in the monitoring frequency and/or limit for mercury.
According to the City, It has been performing weekly monitoring using the expensive and time
consuming EPA 1631 mercury method, and the mercury has only been detected at levels far below the
0.3 ug/l.
c- Reduction in the monitoring frequency and/or limit for nickel.
According to the City, A weekly average monitoring requirement for nickel was instituted last
permit renewal cycle following some high discharges to the Crowders WWTP from an industry. The

Page Four
issue has been corrected, and during this permit cycle, nickel has been monitored weekly and remained
below 42ug/l.
d- Designation of an effluent channel prior to discharge into Crowders Creek.
Since the permit calls for trace amount of foam in the receiving stream, the City would like to
designate a conveyance channel (effluent channel) prior to entering the stream.
Based on the investigation on March 25, 2010, The channel in question meets the criteria of an
effluent channel and this office has no objection for adding it in the permit as an effluent channel.
Pending review and approval by the Western NPDES Program Unit, it is recommended that
the permit be renewed and the above requests be addressed.
Signature of repo
p
arer
Surface Water Protection Regional Supervisor Date

Great Place. Great People. Great Promise.
Department of Public Works and Utilities
Wastewater Treatment Division
March 1, 2010
Ms. Dina Sprinkle
NC DENR - DWQ
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Renewal Application of Permit NC0074268 Crowders Creek WWTP
Dear Ms. Sprinkle:
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, 2010 deadline to comply with the
requirement to apply 180 days prior to the date of permit expiration (August 31, 2010).
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 that treats municipal wastewater for the City of
Gastonia. Since the last permit renewal request, a rehabilitation and upgrade to the
plant's anaerobic digester complex has taken place including addition of mechanical
draft mixers, rehabilitation of digester covers and addition of a supernatant system. A
new raw sludge well has also been constructed along with improvements to the raw
sludge pumping system. Additionally 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 an upgrade of chemical feed
systems, upgrade to the main lift station, installation of a mixer in Oxic Zone 4 in order
to operate as an additional anoxic zone, refurbishing of a generator and improvements
to the SCADA process control. Future projects include automation of the return and
waste activated sludge process and the addition of fine mechanical bar screens at the
preliminary treatment area.
rimi)
c
a INTERNATIONAL
ISO 14001 Certified
Pure and Clean for our Fields and Streams
PO Box 1748 • Gastonia, NC 28053-1748
www.cityofgastonia.com

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
last four and one half years up through December 31, 2009. Efforts have been made to
obtain seasonal variation in the sampling as much as was possible.
Based on the monitoring data, we would like to request consideration of modification to
some of the permit conditions as detailed below.
• Removal of the Tier III facility color permitting requirements: The Crowders
WWTP has had a very clear effluent since January 2003 when the last of the
textile dye houses relocated away from the area. It appears highly unlikely such
operations would return to the area anytime in the foreseeable future.
• Reduction in the monitoring frequency and/or limit for mercury:
Throughout this permit cycle, the Crowders Creek WWTP has performed weekly
monitoring using the expensive and time consuming EPA 1631 mercury method.
Mercury has only ever been detected at levels far below the 0.3 µg/L limit.
• Reduction in the monitoring frequency and/or limit for nickel: A weekly
average monitoring requirement and permit limit for nickel was instituted last
permit renewal cycle following some high discharges to the Crowders WWTP
from an industry. The issue has been corrected, and during this permit cycle,
nickel in the effluent has been monitored weekly and remained below 42 µg/L.
• Designation of an effluent channel prior to discharge into Crowders Creek:
When the Crowders WWTP was built, a channel was constructed from the
discharge pipe to Crowders Creek. We would like this designated as an effluent
channel in the plant component listings to clear up any possible confusion in the
future.
We appreciate your review of our permit application and consideration of these
modification requests. 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 email me at
[e-mail].
Sincerely,
Larry W. Cummings
Division Manager of Wastewater Treatment
City of Gastonia
cc: Matt Bernhardt, Director of Public Works & Utilities, Gastonia —
Stephanie Scheringer — Assistant Division Manager of Operations, Gastonia
David Shellenbarger — Assistant Division Manager of Compliance, Gastonia
Jon Page — Senior Plant Operator, Gastonia
Nancy Matherly — Industrial Chemist, Gastonia
Postage Confirmation: 7007 2680 0001 8980 L000

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 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 have and/or are planning to perform at least some minor I & I work.

B.2 Topographical ` o
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
O Manhole
Abandon Manhole
Proposed Manhole
O SLS
0 Abandon SLS
0 Valve
Monitoring Well
Meter
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
0.3
0.6 Miles
{
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 one inch mechanical screens then
to a grit screw collector. Following preliminary treatment, the flow enters the main lift
station. Four influent pumps lift the influent flow to a splitter box where the flow is split
to two primary clarifiers. The primary clarifier effluent is combined with the return
activated sludge (RAS) in a second splitter box 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 a third splitter box and routed to the two final clarifiers. Sludge from
these clarifiers is routed to the second splitter box 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 through an effluent
channel and into 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
OX
Influent
6 mgd
Main Lift /
Screening /
Grit Removal
Crowders Creek WWTP - Process Flow Schematic
3 mgd
Primary
Clarifiers 4,
Add
Caustic
mgd
Primary
Sludge
F
M
RAS
1.5 mgd internal recycle
OX
Potential Supplemental
Carbon Addition
AN
AN
AX
oX
Current Supplemental
Carbon Addition
AX
Treatment Trains
1.5 mgd internal recycle
oX
oX
OX
4.5
4.5 mgd
Current Supplemental
Carbon Addition
Alum Addition
9 mgd
Final Clarifiers
4.5 mgd v
4.5 mgd v
. Splitter
Anaerobic
Anoxic
Oxic
E
M
1
RAS WAS
3 mgd
6 mgd
AIL
. Polishing Ponds
3 mgd
*Plant design allows for multiple step feed
options into aeration basin
6 mgd
Chlorine
Contact
6 mgd
1
Dechlorination
Static
Aerator
co
3
ca
To Crowders Creek

150 KW
Generator
Crowders Creek VVWTP — Location of Backup Electrical Generation
750 KW
Generator

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
SIGNIFICANT INDUSTRIAL USER INFORMATION:
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
discharges to the treatment works, copy questions F.3 through F.8 and
Supply the following information for each SIU. If more than one SIU
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: A . Carter
Mailing Address: PO Box 518
Gastonia, NC 28053
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Nickel plating, wire cleaning, copper coating, groundwater remediation, washdown. During 2009, User used steel, aluminum, and plastic/nylon and stamped into parts.
Electrolytic nickel plating and electroless nickel plating were performed on site on some steel travelers. User plans to cease all plating operations in early 2010 and CFR
category will likely be revised. Steel wire is drawn to diameter needed by customer. Some is copper coated after being drawn. Some wire coils are pickled. The acid
pickling (HCI) is a 628 gallon tank which is dumped 1/month. Rinse water discharges to pretreatment system throughout first shift. The alkaline cleaner is a 628 gallon
tank which is dumped 1/year. Rinse water discharges to pretreatment system on production days that acid pickling isn't done. Groundwater remediation ceased
December 2009.
processes and raw materials that affect or contribute to the SIU's
rings, steel wire
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal
discharge.
Principal product(s): molded nylon and steel travelers, steel spinning
Raw material(s): steel rod. nylon granules
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of
whether the discharge is continuous or intermittent.
8,170 gpd ( continuous
process
following:
wastewater discharge into the collection
or X intermittent)
system in gallons per day (gpd) and
into the collection system in gallons per
b. Non -process wastewater flow rate. Indicate the average daily volume
day (gpd) and whether the discharge is continuous or intermittent.
0 gpd ( continuous
of non -process wastewater flow discharged
or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the
a. Local limits ® Yes
b. Categorical pretreatment standards ® Yes
If subject to categorical pretreatment standards, which category and subcategory?
Metal Finisher 40 CFR 433.15
0 No
❑ No
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 V VVfP, 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 from process, washdown. air quality units, boiler blowdown and domestic. Animal parts & fluids and restaurant oil & grease are rendered.
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.
129,400 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.
8,600 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 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?
® Yes ❑ No If yes, describe each episode.
February 2008 this SIU discharged high amounts of ammonia nitrogen which caused operational problems at Crowders Creek WWTP, The SIU ceased flow
for 10 days then resumed discharge at a lb/day rate established by the City pretreatment staff in conjunction with operation stab. As the WWTP
microorganisms became acclimated to the situation, greater loading was accepted.
October 2008 this SIU discharged high amounts of nitrates+nitrites. User ceased flow for 8 days , then resumed discharge at a loading established by the City
Pretreatment staff in conjunction with operation staff.
Crowders Creek WWTP experienced no violations as a result of this discharge.

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.
Bessemer City provides no wastewater treatment. Bessemer regulates Dole Fresh Vegetables Inc. via SIU permit: Dole's process, washdown, cooling tower
blowdown, and domestic flow averages 364,000 god. Dole has screens, equalization tank. pH recorder. Chlorine gas is used to reduce bacteria and
microorganisms on vegetables. Chemicals are used for sanitizing equipment. There are no other SIUs. Additional users include Dawn Manufacturing
FMC Lithium, Manufacturing Services. Advanced Drainage Systems, various residential and commercial .
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): Dole's products are vegetables.
Raw material(s): Dole's raw materials are vegetables.
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.
369,000 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.
401.500 gpd (X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
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.
No trouble experienced but levels of cyanide are of concern: A Consent Order is in effect to research problem and implement reduction.

FACILITY NAME AND PERMIT NUMBER:
Crowders Creek VVVVfP, 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.
Daily flow from this SIU consists of I&I plus domestic from one house. Additional flow has come only when there was a power outage at a lift station, causine
the wet well overflow to come to Crowders WWTP for 1 to 2 hours. Possible additional flows may be from various residential, commercial, and industrial
sources east of Hwy 216 and could include flow from 2 metal finishers and a tire fabric 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.
0 gpd ( 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.
30,400 gpd (X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ 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 VVWTP, 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: Industrial Fabricators
Mailing Address: P.O. Box 12885
Gastonia NC 28053
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Liquid painting and Powder coating. Parts undergo 5 stages: citrus acid clean/rinse/iron phosphate/rinse/rinse. Parts are then dried, painted, cured. Citrus acid
cleaner tank and phosphate tank are emptied once per 6 months and discharge to the pretreatment system. Process rinse tanks continually overflow to
pretreatment system during first shift hours. If pretreatment system operator is not present, process rinse tanks recycle and no process discharge occurs.
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): Parts for construction equipment and heavy trucks. Facility does fabrication of metal parts, laser cutting, CNC machining, forming
welding in addition to the liquid painting and powder coating_
Raw material(s): steel, aluminum
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.
8,000 gpd ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
2,450 gpd ( continuous or )X intermittent)
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?
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: Lubrizol Advanced Materials Inc.
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): acrylic latex and compounded latex for textiles, automobile companies, paint bases household beauty and hygiene items.
Raw material(s): vinylidene 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.
13.200 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.
0 gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards to Yes ❑ 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?
❑ Yes ® No If yes, describe each episode.

FACILITY
SIGNIFICANT
Supply
provide
NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Catawba River Basin
INDUSTRIAL USER INFORMATION:
the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
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: Powder Coating Services Inc.
Mailing Address: 1260 Shannon Bradley Road
Gastonia, NC 28052
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Coatings. electrostatic painting. domestic through separate pipe. Process waters discharged are about half from powder coat and half from ecoat. Powder coat
process tanks include alkaline cleaner / rinse / iron phosphate / rinse / corrosion inhibitor sealer and then to painting. Some items also undergo acid pickle descale
and rinse. Ecoat line uses zinc phosphate. When ecoating aluminum, the phosphate tank is bypassed and alodine is used instead.
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, aluminum, paint, polyester powder. cleaners
system in gallons per day (gpd) and
into the collection system in gallons per
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.
28,900 gpd ( continuous or X intermittent)
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.
1.500 gpd ( continuous or X intermittent) .
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes 0 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 VVWTP, 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: P.O. Box 1060
Clover, SC 29710
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
The Town of Clover is required to operate its own Pretreatment Program. Honeywell and Munzing are permitted SIUs. Various residential. commercial, and
industrial flow is discharged.
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): Honeywell's = synthetic rubber gloves; Munzing's = defoamer. Performance Friction = brake shoes: Jameson = tool covers and
handles: Part Inc = molded plastic injection; Tuscarora Textiles = washes yarn: SE Huffman = metal cabinets and computer housing; Springfield = uses water
jet technology on medical equipment, turbine blades.
Raw material(s): various
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.
15.000 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.
556.250 gpd (X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
The Town of Clover has issued two SIU permits both to categorical users: Honeywell is 40 CFR 428; Munzing is 40 CFR 414.
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.
The Town of Clover's ammonia nitrogen levels have contributed to problems handling the amounts of nitrogen but Crowders Creek WWTP has experienced
no violations as a result of such discharge.

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. Two of these digesters are
covered and capable of being heated, so both may be used as primary digesters. Currently one of
the digesters is being heated and operated as a primary digester, one digester is used as a
secondary digester, one digester is used for supernating 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

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testing occasionally performed as back-up method. At a minimum, the primary digester
FACILITY NAME AND PERMIT NUMBER:
Crowders Creek WWTP, NC0074268
PERMIT ACTION REQUESTED:
Renewal
Additional Information for NPDES Permit Application
Sludge Management Plan (Continued)
RIVER BASIN:
Catawba River Basin
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
also recorded. Vector attraction reduction is demonstrated by a measurement of 38% volatile
solids reduction using the Van Kleeck's equation. 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. Gastonia contracts with EMA Resources to perform this land application.
Biosolids from Gastonia's two wastewater treatment plants are land applied to 2,010.6 acres of
local farmland in North Carolina, in accordance with NCDENR Land Application Permit
WQ0001793 and 414 acres in South Carolina under SC DHEC Land Application of Domestic
Sludge Permit ND0084883. One hundred seventy-seven of the acres in North Carolina 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. Additionally the City is
participating in the National Biosolids Partnership Environmental Management Program. This
program has helped to further improve some aspects of its biosolids handling. In particular, the
biosolids program has benefited 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.