NC0031879_Permit Issuance_20061122

Mr. Larry Carver
Superintendent
P.O. Box 700
Marion, North Carolina
Dear Mr. Carver:
28752
Michael F. Easley, Govemor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
November 22, 2006
Subject: Issuance of NPDES Permit
NC0031879
Corpening Creek WWTP
McDowell County
Division personnel have reviewed and approved your application for renewal of the subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,1994 (or
as subsequently amended).
During the public notice period for this permit, several comments were received. The main
concerns pertained to compliance issues. Based on those comments, the Division chose to hold a public
hearing on the proposed Special Order by Consent rather than this permit. The draft SOC went to public
notice in August 2006 and a public hearing was held on October 30, 2006. Based on the proposed SOC,
the requirement to submit for a wastewater management plan will be removed from this final permit.
Please note that this final permit contains a TRC limit to take effect July 1, 2008.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty
(30) days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such
demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect the
legal requirements to obtain other permits which may be required by the Division of Water Quality or
permits required by the Division of Land Resources, the Coastal Area Management Act or any other
Federal or Local govemmental permit that may be required.
If you have any questions concerning this permit, please contact Toya Fields at telephone
number [phone], extension 551.
cc: Central Files
Asheville Regional Office/Surface Water Protection
NPDES Unit
Marshall Hyatt, EPA Region IV
Gracia O'Neill, Clean Water For North Carolina, 291 Page Ave., Asheville, NC 28801
C. David Merryman, Catawba Riverkeeper Foundation, 421 Minuet Lane Ste 205, Charlotte, NC 28217
Sincerely,
CIA /1(2ir--J
lan W. Klimek, P.E.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
512 N. Salisbury Street, Raleigh, North Carolina 27604 On the Internet at http://h2o.enr.state.nc.us/
An Equal opportunity/Affirmative Action Employer
One
NorthCarolina
Naturally

Permit No. NC0031879
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the Federal Water Pollution Control Act, as
amended,
City of Marion
is hereby authorized to discharge wastewater from a facility located at
Corpening Creek WWTP
NC Hwy 226
McDowell County
to receiving waters designated as Corpening Creek in the Catawba River Basin in accordance
with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II,
III, and IV hereof.
This permit shall become effective January 1, 2007.
This permit and authorization to discharge shall expire at midnight on January 31, 2010.
Signed this day November 22, 2006.
an W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0031879
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.
City of Marion is hereby authorized to:
1. Continue to operate an existing 3.0 MGD wastewater treatment facility consisting of the
following components:
• Influent pump station
• Bar screen
• Grit removal
• Primary clarifiers
• Aeration basin
• Lime addition
• Tertiary filters
• Gravity sludge thickeners
• Vacuum sludge filters
• Step aeration
• Chlorination
The facility is located at the Corpening Creek WWTP on NC Highway 226, Marion,
McDowell County.
2. Discharge from said treatment works at the location specified on the attached map into
Corpening Creek which is classified C waters in the Catawba River Basin.

r
Wdsei:Vtigi)14)7401. Ptkoh.
Corpening Creek WWTP - NC0031879
USGS Quad Name: Marion East
Receiving Stream: Corpening Creek (Youngs
Fork)
Stream Class: C
Subbasin: Catawba — 03 08 30
Lat.: 35°39'04"
Long.: 81°57'29"
179
Not to SCALE

Y j T
Permit No. NC0031879
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge wastewater treatment plant effluent from outfall serial number 001. Such discharges
shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location1
Flow
3.0 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C2
30.0 mg/L
45.0 rng/L
Daily
Composite
E, I
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
E, I
NH3 as N
3/Week
Composite
E
Dissolved Oxygen3
Daily
Grab
E
Dissolved Oxygen
1
Grab
U, D
Fecal Coliform
200/100 ml
400/100 ml
Daily
Grab
E
Fecal Coliform
1
Grab
U,D
pH
Between 6.0 and 9.0 s.u.
Daily
Grab
E
Total Residual Chlorine4
25 pg/L
Daily
Grab
E
Temperature
Daily
Grab
E
Temperature
1
Grab
U,D
Total Nitrogen
Monthly
, Composite
E
Total Phosphorus
Monthly
Composite
E
Conductivity
_
Daily
Grab
E
Conductivity
1
Grab
U, D
Oil and Grease
2/Month
Grab
E
Total Cadmium
3 pg/L
15 pg/L
Weekly
Composite
E
Total Cyanides
7.5 pg/L
22 pg/L
Weekly
Grab
E
Total Copper
2/Month
Composite
E
Total Zinc
2/Month
Composite
E
Total Silver
2/Month
Composite
E
Chronic Toxicity6
Quarterly
Composite
E
Priority Pollutant Scan7
Annual
Grab
E
tvotes:
1. Sample locations: E - Effluent, I - Influent, U - Upstream 100 ft, D- Downstream at NCSR 1794 (Clinchfield Road).
Upstream and downstream monitoring shall be grab samples and shall be conducted 3/week during June, July, August,
and September and 1/week during the rest of the year.
2. The monthly average BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal).
3. The daily dissolved oxygen effluent concentrations shall not be less that 5.0 rng/L.
4. TRC limit will take effect July 1, 2008. Limit and monitoring requirement apply only if chlorine is used for disinfection.
5. The Division shall consider all cyanide concentrations reported below 10 pg/L to be "zero" for permit -compliance
purposes only. A North Carolina certified lab should continue to report all cyanide values detected, even if these values
are below the division's specified quantitation level of 10 µg/L.
6. Chronic Toxicity (Ceriodaphnia) P/F at 67%; February, May, August, and November; See condition A(3). of the
Supplement to Effluent Limitations and Monitoring Requirements portion of this permit.
7. See special condition A(4). 0,9i 3, O
There shall be no discharge of floating solids or foam visible in other than trace amounts. 09
"0

1 S t .1
Permit No. NC0031879
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A(2). CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia
dubia at an effluent concentration of 67 %.
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 February, May, August and November. Effluent sampling for this testing shall be performed at
the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then
multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North
Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes,
and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form
(MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B
for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: 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 Branch no later than 30 days after the
end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response
data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the
effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee
will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit
number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the
form. The report shall be submitted to the Environmental Sciences Branch at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required
during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Quality
indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring
requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival,
minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will
require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial
monitoring.

Permit No. NC0031879
A. (3) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in accordance with
40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring) variations
over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the
method detection level and the minimum level shall be the most sensitive asprovided by the appropriate analytical
procedure.
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Total Kjeldahl nitrogen
Oil and grease
Total Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dihloroethane
Trans-1,2-d ichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable 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
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director,
within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address:
Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

NCDENR/DWQ
AMENDED FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Marion - Corpening Creek WWTP
NC0031879
sil ty Informa on .
(1.) Facility Name:
E Corpening Creek WWTP_.___.__
13.0
(6.) County:
_______
McDowell
(2.) Permitted Flow (MGD):
(3.) Facility Class: ---1
IV L(7.) Regional Office:
Asheville
(4.) Pretreatment Program: i LTMP I (8.) USGS Topo Quad:
E11NW
(5.) Permit Status:
J Renewal ! (9.) USGS Quad Name:
trgam Characteristics
(1.) Receiving Stream:
Corpening Creek
(7.) Drainage Area (mi2):
8.28
(2.) Sub -basin:
03-08-30
(8.) Summer 7Q10 (cfs):
2.3
(3.) Stream Index Number:
11-32-1-4b
(9.) Winter 7Q10 (cfs):
3.6
(4.) Stream Classification:
C
(10.y 30Q2 (cfs):
(5.) 303(d) Status:
Listed impaired due to
biological data.
(11.) Average Flow (cfs):
12
(6.) 305(b) Status:
(12.) IWC %:
67
Summary
During the public notice period for this permit, comments were received from the Catawba Riverkeeper
foundation, Clean Water for North Carolina, and several concerned residents. The main concerns presented
had to do with violations of the facility's BOD, TSS, cadmium and cyanide limits. Several of the comments
also requested a public hearing. Since most of the comments focused on operational and maintenance
issues, the Division determined that it would be more appropriate to hold a public hearing on the proposed
SOC rather than the draft permit.
The draft SOC went to public notice in August 2006 and a public hearing was held on October 30, 2006.
Based on the draft SOC, the requirement for a wastewater management plan will be removed from this final
permit.
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: December 7, 2005
Permit Scheduled to Issue: December 1, 2006
State Contact Information
If you have any questions on any of the above information or on the attached permit, please contact Toya
Fields at [phone], extension 551.

• r t
NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Marion - Corpening Creek WWTP
NC0031879
��F ' °I': ati�,
.sHa*-+,
(1.) Facility Name:
Corpening Creek WWTP
(2.) Permitted Flow (MGD):
3.0
(6.) County:
McDowell
(3.) Facility Class:
IV
(7.) Regional Office:
Asheville
(4.) Pretreatment Program:
L_LTMP _________ ___ ____.___..._
Renewal
(8.)_USGS Topo Quad:
(9.) USGS Quad Name:
E11NW
(5.) Permit Status:
= , µ r � �
in'rtM
8S.
,_.. ..r. Characteristicso+,.
_ay.
(1.) Receiving Stream:
Corpening Creek
' (7.) Drainage Area (mi2):
8.28
(2.) Sub -basin:
03-08-30
(8.) Summer 7Q10 (cfs):
2.3
(3.) Stream Index Number: .-...
11-32-1-4b
(9.) Winter 7Q10 (cfs):
3.6
(4.) Stream Classification:
C
(10.) 30Q2 (cfs):
(5.) 303(d) Status:
Listed impaired due to
biological data.
(11.) Average Flow (cfs):
12
(6.) 305(b) Status:
(12.) IWC %:
67
1.0 Proposed Changes Incorporated Into Permit Renewal
• Addition of requirement to submit a facilities assessment and optimization plan.
• Add TRC limit of 25 µg/L based on 67% IWC.
2.0 Summary
Corpening Creek is currently on the 2003 303(d) list due to biological data. The cause of the
impairment is unknown but potential sources are municipal point sources, urban runoff, and
storm sewers. The 2004 Catawba Basin Plan notes that the primary cause of the impairment may
be toxic impacts. "Other cumulative causes that contribute to the impairment are habitat
degradation due to sedimentation and lack of microhabitat, hydromodification due to scour, and
nutrient enrichment." The plan also states that the water quality problems seen in the creek are
typical of urban streams and that efforts to address water quality issues in the Watershed should
concentrate on non -point source pollution reduction and urban stormwater pollution.
3.0 Compliance Summary
DMR Data Review
Monthly DMR data was reviewed for the period of January 2002- July 2005. The data is
summarized in the following table. During the review period, the facility had a number of
effluent limit violations. Limits for BOD, fecal coliform, DO, and TSS were all exceeded. It
appears that excessive amounts of rainfall tend to result in high Levels of these pollutants in the
facility's effluent. A wastewater management plan will be added as a special condition to the
permit, requiring the facility to perform a Facilities Assessment. This assessment should describe
deficiencies and operational difficulties in the existing collection system or treatment facility

NPDES Permit Fact Sheet - 12 / 02 / 05 City of Marion - Corpening Creek WWTP
Page 2
NC0031879
affecting performance and permit compliance and identify potential improvements to correct
those. The facility will also be required to submit an optimization plan identifying specific
measures and key tasks and an estimated schedule for completion of each.
Flow
Temp.
TRC
BOD
NH3-N
TSS
D.O.
TN
TP
Oil &
(
(MGD)
(deg C)
(ug/L)
(mg/L)
(mg/L)
(mg/L)
(mgfL)
(mg/L)
(mg/L)
Conductance
Grease
Avg
0.73
17.43
0.43
9.79
3.63
20.28
7.46
15.46
3.15
325.48
1.14
Max
1.08
24.3
0.80
37.43
18.23
160.92
9.95
160.00
90.00
425.59
7.65
Min
0.46
10.56
0.08
0.55
0.13
0.0000
6.10
1.10
0.00
274.48
0.00
Instreant Data
RPA Analysis
RPAs were performed for the permitted parameters cadmium, copper, cyanide, silver, and zinc.
The facility has violated its permit limit for both cadmium and cyanide, therefore the limit will
remain in the permit.
The facility's data showed a reasonable potential to exceed water quality standards for copper,
silver and zinc, however these are action level parameters. Since the facility has been passing
WET tests, limits for these parameters will not be included in the permit.
The facility is required to submit LTMP data, however it was not included on the DMRs.
WET Test Results
The Corpening Creek WWTP has a chronic WET testing requirement at 67% effluent
concentration. The facility has passed 21/22 WET tests administered since February 2001
Correspondence File Review/Compliance Histony
From January 2002 to July 2005, the Corpening Creek WWTP has incurred the following permit
limit violations:
> 11 violations of BOD limits (7 weekly average, 4 monthly average)
> 1 violation of the weekly average cadmium limit
> 2 violations of weekly geometric mean fecal coliform limit
> 12 violations of cyanide limits (2 daily maximum, 10 weekly average)
> 8 violations of the daily minimum D.O. limit.
> 20 violations of TSS limits (13 weekly average, 7 monthly average)
These violations have resulted in 15 enforcement cases and $22,223.88 in civil penalties (after
remissions). The facility is currently on EPA's watchlist for having more than 25 violations ina
two-year period.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: November 9, 2005
Permit Scheduled to Issue:
5.0 State Contact Information

NPDES Permit Fact Sheet - 12 / 02 / 05
Page 3
City of Marion - Corpening Creek WWTP
NC0031879
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature Date
Regional Office Comments:
ARO has no issues with this draft permit. Please be aware that ARO and DWQ
are currently working with the City on an SOC for this facility and the collection
system.
Regional Recommendation by:
Signature
Date /���s
Reviewed and accepted by:
Regional Supervisor:
Signature f � e .d,,,„-,AA,
Date
e 2.12_4 S
NPDES Unit Supervisor:
Signature
Date

DIVISION OF WATER QUALITY
August 15, 2006
To: Paul Clark
Non Point Source Planning Unit
From: Bob Guerra
Western NPDES Unit
Subject: CWMTF Proposal
Project ID: 2006B-512
City of Marion — WW/WW/Regionalization, Discharge Elimination and I&I
Corpening Creek
NPDES No. NC0031879
This request from the City of Marion to:
1. Acquire lands and easements for riparian buffers or greenways to protect
surface waters or urban drinking water supplies.
2. Restore degraded lands for their ability to protect water quality, including
stream restoration projects.
3. Improve wastewater treatment.
4. Improve stormwater controls and management and
5. Facilitate planning that targets reductions in surface water pollution.
From the perspective of the NPDES Unit, this request could benefit water quality by
allowing the Corpening Creek WWTP to correct a lot of ongoing issues with the
operation and maintenance of the facility. The NPDES Unit would have no objection to
this request, as long as the requirements set forth by the NPDES Unit, Pretreatment
Unit and the Stormwater Section were met.
cc: Central Files
NPDES Unit

\leo sr,,?
to
A:C)
tirq� PRO1 &
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
JAN 0 4 2006
Ms. LeToya Fields
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permits
Maiden WWTP — NC0039594
Marion Corpening Creek WWTP — NC0031879
Dear Ms. Fields:
In accordance with the EPA/NCDENR MOA, we have completed review of the draft
permits referenced above and have no comments. We request that we be afforded an additional
review opportunity only if significant changes are made to the draft permit(s) prior to issuance or
if significant comments objecting to either are received. Otherwise, please send us one copy of
each final permit when issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
J A N - 9 2006
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable . Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

4.3-7990
NORTH CAROLINA
BURKE COUNTY
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of Catawba County,
North Carolina, duly commissioned, qualified, and authorized
by law, to administer oaths, in said County and State; that he/
she is authorized to make this affidavit and sworn statement;
that the notice or other legal advertisement, a true copy of
which is attached hereto, was published in
The News Herald
on the following dates:
December 11, 2005
and that the said newspaper in which such notice,
or legal advertisement was published, was a newspaper
meeting all of the requirements and qualifications of Section
1-597 of the General Statutes of North Carolina.
Assistant Bookkeeper
Sworn to and subscribed before me, this
/2' day of , 2005
Notary Public
My Commission Expires March 11, 2009
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE
CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT
TO ISSUE A NPDES
WASTEWATER PERMIT
0n the bass of thorough stall
review and application of NC
General Statute143.21, Pub-
lic Law 92.500 and other law-
ful standards 'and regulations,
the North Carolina Environ-
mental System (NPDES)
wastewater discharge permit
to the person(s) listed below
effective 45 days from the
publish date of this notice. . •
Written comments regarding
the proposed 'permit will be
accepted until 30 days ,after.
the publish date of fills notice.
All comments received prior to
that date are considered in the
final determinations regarding
the proposed permit. The D.
rector of the NC Division of
Water Quality may decide to
hold a public meeting for the
proposed .permit should . the
Division receive a significant
degree of public Interest. .
Copies of the draft permit. and
other supporting' 'Information
on file used to determine con-
ditions present in the draft per-
mit are available upon request
and payment o1 the costs of
reproduction. Mail comments
and/or requests for informa-
tion to the NC Division of Wa-
ter Quality at the above ad-
dress or call the Point Source
Branch at [phone],.ex-
tension 520 or 383.-Please in -
dude the NPDES' permit num-
ber (attached) •in any comm.,
nication. Interested'persons
may also visit the Division .of
Water Quality at 512 N. Salis-
bury Street, • Raleigh, NC
27604.1148 between the
hours of 8:00 am; and. 5:00
kern.. to review information • on
The City of Marlon (P.O. Box
700, Marlon, NC 28762) has
applied for renewal of NPDES
permit NC0031879 for the Co-
pening Creek WWTP in
McDowell County, This per-
mitted facility discharges 3.0
MGD al treated wastewater to
,.Corpening Creek (Youngs
Fork) In thb Catawba River
Basin. Currently total residual
• chlorine, cyanide and cadmi•
• um are water quality limited.
This discharge may affect fu-
ture allocations In the portion
of the Catawba River Basin. •
PUBLISH: December 11,

DIVISION OF WATER QUALITY
February 20, 2006
To: Paul Rawls
Section Chief, Surface
Water Protection
Through: Susan Wilson E'`" "�
Supervisor, W tern NPDES Program G
From: Toya Fields br--
Western NPDES Program
EB 2 2 2006
IR - WATER QUALITY
ATER PROTECTION SECTION
Subject: City of Marion, Corpening Creek WWTP
Summary of Comments Received on Draft NPDES Permit NC0031879
v 4°(
�1 d`' a�
d
/ ay
V'
6-`7‘-V- kivre"
The abovetinentioned draft permit was sent to public notice on December 11, 2005. During the notice
period three comments were received from the Catawba Riverkeeper Foundation, Clean Water for
North Carolina (CWFNC), and concerned resident Roger Sprinkle. Prior to the notice being
published comments were also received from concerned resident Julie Erb and CWFNC. The
concerns are summarized as follows:
> In 2002 the Corpening Creek WWTP exceeded its cadmium limit by "33,233%".
(The facility violated its weekly average limit of 3 ug/L with a value of 5.7 pg/L. It is unclear
what the value of 33,233% refers to however all of the comments except those from the Catawba
Riverkeeper Foundation reference this value.)
➢ Monitoring frequencies for cadmium and cyanide are not stringent enough.
The comments argue that since the facility is only required to monitor limited parameters on a
weekly basis, the reported value may be an average of several high, unreported samples or the
lowest of several samples taken during a given week. The comments argue that daily maximum
limits should be monitored on a daily basis.
> The facility has had difficulty meeting its BOD and TSS limits. These have an effect on the
stream, especially given its impaired status. Steps need to be taken to resolve whatever
difficulties are causing these violations.
The stream's 303(d) status should result in more stringent requirements for the facility.
The facility should not be allowed to receive pretreated industrial waste.
The facility should receive total nitrogen and total phosphorus limits given the effect excessive
nutrients can have on water quality.
According to EPA's Enforcement & Compliance History Online (ECHO), the WWTP has
received a total of 9 violations in the past 3 years, a total of $13,375 in assessed penalties, and
been in significant non-compliance during 10 of the past 12 years. Based on these factors, the
penalties should be increased.
➢ CWFNC, Roger Sprinkle, and the Catawba Riverkeeper Foundation formally request a public
hearing to discuss these concerns.

Clean
Water
for
North Carolina
Board of Directors
Maccene Brown-Lyerly
Durham
Robin Cape
Asheville
Isaac Coleman
Asheville
Molly Craven
Asheville
Montie Hamby
Winston-Salem
Allen Hubbard
Charlotte
Nathanette Mayo
Shiloh
Richard Mc'Elrath
Charlotte
Emma Patti
Fairview
Marshall Tyler
Mocksville
Staff
Hope Taylor -Guevara
Executive Director
Gracia O'Neill
Outreach Coordinator
Belinda Joyner
Northeast NC Organizer
Kelli Reed
Central NC Organizer
2 3 2006
NC Division of Water Quality - NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
To Whom It May Concern:
January •10, 2006
I 'am writing to you, on behalf of Clean Water for North Carolina, regarding the upcoming
NPDES permit renewal for the Marion-Corpening Creek WWTP. After viewing the
compliance records and current permit of this facility,. we have some concerns about what
this plant is discharging into our natural water resources, and formally request a public
hearing to provide the opportunity for further public comment.
The Marion-Corpening Creek WWTP exceeded its cadmium limit by 33,233% in 2002.
This percentage is extremely alarming and calls into question -the appropriateness of the
monitoring frequency on.the current permit and continuing to allow the plant to receive
pretreated industrial waste. Cadmium and cyanide currently have daily maximum limits,
but the facility is only required to. monitor for these compounds on a weekly basis:
Requiring only weekly -monitoring for these substances allows the WWTP to take
multiple readings over the course of the week to get their weekly average down below the •
weekly limit if their first reading was too high. Since the facility only has to monitor for
cadmium and cyanide weekly, then it is possible the WWTP (or any industry discharging
• "pretreated" waste to this facility) may have exceed the daily limit after that week's
measurement is taken. These dangerous toxic chemicals pose a threat to the health of
. Corpening Creek and, as they have. daily. maximum limits, they must be monitored •
DAILY, with enforced DAILY limits, and no weekly averaging!
In addition, the Marion-Corpening Creek WWTP has been having some recent trouble
complying with the biological oxygen demand (BOD), total suspended solids (TSS), and
cyanide limits in its permit. These are very important aspects of water quality for this
impaired stream. If the BOD limits continue to be exceeded, aquatic organisms will
suffer from the lack of sufficient oxygen. Lack of oxygen in the sediments could then
. facilitate the natural release of iron into the water, further. altering the aquatic habitat of
this impaired stream. The excess TSS will affect the plant life in the stream, and the
alarming excess of cyanide appears to be causing ongoing unresolved issues of
significant non-compliance. The WWTP might need new technology or training to .
comply with these limits, but it is completely unacceptable for the Marion-Corpening
WWTP to continue to violate these limits. •
�.i
Recycled paper, chlorine free •
291 Page Ave. Asheville, NC 28801 [phone] [e-mail]
2009 Chapel Hill Rd., Durham, NC 27707 [phone] [e-mail]
wwwcwfnc.org www.leadtesting.org

Corpening Creek is an impaired stream, listed on the State's 303(d) list due to unspecified or unknown sources.
The current NPDES permit for the Marion-Corpening Creek WWTP states that "If water quality problems •
continue, removal of direct point source discharges may be required in the future to improve the health of the
stream." Clearly water quality problems have continued to occur and there is no good reason why, at the least,
the Marion-Corpening WWTP should still be allowed to receive pretreated industrial waste.
Furthermore, the limits for total nitrogen and total phosphorous are not listed on the current permit, and these
are veryimportant nutrients when managing for water quality. Why are these limits .not present? Given the
effect that these nutrients can have on water quality, total nitrogen and total phosphorus must be added to the
limitations on the permit.
•
Finally, according to the EPA's Enforcement &Compliance History Online (ECHO), the Marion-Corpening
Creek WWTP has received a total of 9 formal enforcement actions in the past 3 years, with a total of $13,375 in
assessed penalties, and has been in Significant Non -Compliance during 10 of the past 12 quarters. Needless to
say, this is an awful track record. Furthermore, the fines being assessed to this facility are too weak. The
DENR Div. of Water Quality must increase the.minimum•fines for NPDES permit violations to at least $5,000
per violation (only 20 % of the daily maximum penalty per violation) to more nearly compensate for the
benefits of non-compliance and to illustrate that these are serious violations of the law.
I request that you seriously consider these concerns when reviewing this permit, and strongly recommend that
this permit NOT be granted as written. I also request that you schedule a public hearing to better receive
comments concerning the renewal of this chronic violator's permit, and that you notify us well in advance of the
date of that public hearing.
Sincerely,
Gracia'O`Neill
Outreach Coordinator
Clean Water for North Carolina
29 1/2 Page Ave. '
Asheville, NC 28801
[phone]
,www.cwfnc.org.

C c2UtWW bw
Catawba Riverkeeper Foundation, Inc.
421 Minuet Lane Ste. #205 Charlotte NC 28217-2784
Phone: [phone] Fax: [phone]
January 13, 2006
VIA ELECTRONIC MAIL
Mr. David Goodrich, NPDES Supervisor
Division of Water Quality, DENR
1611 Mail Service Center
Raleigh, North Carolina 27699-1611
Re: Corpening Creek WWTP- License Renewal Comments
Dear Mr. Goodrich:
The Catawba Riverkeeper Foundation® is writing to you regarding the upcoming NPDES permit
renewal for the Marion-Corpening Creek WWTP. After reviewing and analyzing the compliance
records and current permit of this facility, we have some concerns about this plant's discharge
violations and their harm to our natural water resources. We would like to formally request a
public hearing to provide the opportunity for further public comment.
We have conferred with Clean Water for North Carolina, and echo the concerns and problems
they raise in their comment letter. We incorporate that letter and its contents by reference. We
encourage the state to acknowledge this request for a public hearing regarding Corpening
Creek WWTP renewal.
With numerous violations and dainty fines, we request that you seriously consider these
concerns when reviewing this permit, and strongly recommend that this permit NOT be granted
as written. We also request that you schedule a public hearing to better receive comments
concerning the renewal of this chronic violator's permit, and that you notify us well in advance of
the date of that public hearing.
Thank you for the opportunity to comment on this important matter.
Sincerely
C. David Merryman
Assistant Catawba Riverkeeper
Catawba Riverkeeper Foundation®
421 Minuet Lane Ste. #205
Charlotte, NC 28217-2784
704.679.9494
http://www.catawbariverkeeper.org
Protecting Your Water ... Without Compromise
Visit our website: http://www.catawbariverkeeper.org

Draft Permit Reviews
Subject: Draft Permit Reviews
From: John Giorgino <[e-mail]>
Date: Tue, 20 Dec 2005 11:35:00 -0500
To: Toya Fields <[e-mail]>
Hi Toya, I have reviewed the following:
NC0039594 Maiden WWTP
NC0031879 Corpening Creek WWTP
NC0021181 Belmont WWTP
I have no comments. Thanks for forwarding them.
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: [e-mail]
Web Page: http://www_esb.enr.state.nc.us
loll
3/14/2006 2:54 PM

�tf11it -A' G C 1 ,yf"
NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form
Cra7Ami--k av-q•
ow II'u T
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request 10/24/2005
Facility
City of Marion- Corpening Creek WWTP
_. __. _r
Permit #
NC0031879
OAKAnitA
Region
Asheville
Requestor
Toya Fields
i
Di)
Pretreatment
Contact
A-F TownsLDana Folley (ext. 523) }��=,�
G-M Towns- Jon Risgaard (ext. 580)
N-Z Towns- Deborah Gore (ext. 593)
COMMENTS TO PRETREATMENT UNIT:
PRETREATMENT UNIT COMPLETES THIS PART:
Status of Pretreatment Program (circle all that apply)
1) the facility has no SIU's and does have a Division approved Pretreatment Program that is INACTIVE
2) the facili has no SIU's and does not have a Division approved Pretreatment Program
( 3) the facility has (er-is-developing) a Pretreatment Program
3alis Full Program with LTMP / or 3b) is Modified Program with STMP
4) the facility MUST develop a Pretreatment Program - Full Modified
5) additional conditions regarding Pretreatment attached or listed below
Flow Permitted A.GD Actual MGD 3 v5—
Industrial c) f i y�,',�
STMP time frame:
most recent
r _-, %r �,
Domestic `•S W
next cycle
X 0 , (.
L
(S)
T
MP
Pollutant
Check List
POC due to
NPDESINon-
Discharge
Permit Limit
Required
by EPA'
Required by
503 Sludge"
POC due to SIU'.
Site specific POC (Provide Explanation)"'-
STMP T
Frequency
effluent
at
LTMP
Frequency
effluent
i Q
at
M
✓
BOD
3z•
-v'4
V
TSS
-3 L
V
4
Q
M
NH3
V
4
Q
M
V
Arsenic
✓
4
Q
M
4
Cadmium
,cc.,
d
w
4
Q
M
4
Chromium
4
t/
4
Q
M
4
Copper
q
✓
✓
4
Q
M
V
Cyanide
. c ;•4;
V.
4
Q
M
4
Lead
4
✓
4
Q
M
/
Mercury
t'
✓
4
Q
M
Molybdenum
it
4
Q
M
\1
Nickel
4
v
4
,..QitM
Silver
4
Q M
V
Selenium
/
4
Q M
Zinc
-1
V
v"4
Q IM
4
Q M
4
Q M
4
Q M
4
Q M
4
Q M
4
Q M
'Always in the LTMP
"Only in the LTMP if the POTW land applies sludge
—Only in LTMP while the SIU is connected to the POTW
"" Only in LTMP when the pollutant is a specific concern to the POTW (ex -Chlorides for a POTW who accepts Textile waste)
all LTMP/STMP effluent data
on DMRS?
Yes -
Q= Quarterly
M=Monthly
No ) (attach data)"
Comments:
available in spreadsheet?
—
Yes X. No
version 10/8/03
NPDES_Pretreatment. request.form.031008
Revised: August 4, 2000

NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Marion — Corpening Creek WWTP
NC0031879
:. �M II i .orm to tl 2 L
. , � �-,-.- �.F a oxt -
(1.) Facility Name:
Corpening Creek WWTP
(2.) Permitted Flow (MGD):
3.0
(6.) County:
McDowell
(3.) Facility Class:
(4.) Pretreatment Program: 1
IV _
LTMP
(7.) Regional Office:
Asheville
__
(8.) USGS Topo Quad:
__ __
E11NW
(5.) Permit Status:
Renewal
1 (9.) USGS Quad Name:
Stxe �iaract sfi�es -.._.. _... :�
... � .:: alit _..eri . .. ..._ _... F . ' .- .. x
(1.) Receiving Stream:
Corpening Creek
(7.) Drainage Area (mi2):
8.28
(2.) Sub -basin:
03-08-30
(8.) Summer 7Q10 (cfs):
2.3
(3.) Stream Index Number:
11-32-1-4b
(9.) Winter 7Q10 (cfs):
3.6
(4.) Stream Classification:
C
(10.) 30Q2 (cfs):
(5.) 303(d) Status:
Listed impaired due to
biological data.
(11.) Average Flow (cfs):
12
(6.) 305(b) Status:
(12.) IWC %:
67
1.0 Proposed Changes Incorporated Into Permit Renewal
• Addition of requirement to submit a facilities assessment and optimization plan.
• Add TRC limit of 25 pg/L based on 67% IWC.
• An annual priority pollutant scan has been added to the permit.
2.0 Summary
Corpening Creek is currently on the 2003 303(d) list due to biological data. The cause of the
impairment is unknown but potential sources are municipal point sources, urban runoff, and
storm sewers. The 2004 Catawba Basin Plan notes that the primary cause of the impairment may
be toxic impacts. "Other cumulative causes that contribute to the impairment are habitat
degradation due to sedimentation and lack of microhabitat, hydromodification due to scour, and
nutrient enrichment." The plan also states that the water quality problems seen in the creek are
typical of urban streams and that efforts to address water quality issues in the Watershed should
concentrate on non -point source pollution reduction and urban stormwater pollution.
3.0 Compliance Summary
DMR Data Review
Monthly DMR data was reviewed for the period of January 2002- July 2005. The data is
summarized in the following table. During the review period, the facility had a number of
effluent limit violations. Limits for BOD, fecal coliform, DO, and TSS were all exceeded. It
appears that excessive amounts of rainfall tend to result in high levels of these pollutants in the
facility's effluent. A wastewater management plan will be added as a special condition to the
permit, requiring the facility to perform a Facilities Assessment. This assessment should describe

NPDES Permit Fact Sheet - 12/06/05
Page 2
City of Marion - Corpening Creek WWTP
NC0031879
affecting performance and permit compliance and identify potential improvements to correct
those. The facility will also be required to submit an optimization plan identifying specific
measures and key tasks and an estimated schedule for completion of each.
Flow
(MGD)
Temp.
(deg C)
tiilfC
��"�
BOD
(mg/L)
NH3-N
(mg/L)
TSS
(mg/L)
D.O.
(mg/L)
TN
(mg/L)
TP
(mg/L)
Conductance
Oil &
Grease
Avg
0.73
17.43
0.43
9.79
3.63
20.28
7.46
15.46
3.15
325.48
1.14
Max
1.08
24.3
0.80
/ 37.43
18.23
160.92
9.95
160.00
90.00
425.59
7.65
Min
0.46
10.56
0.08
0.55
0.13
0.0000
6.10
1.10
0.00
274.48
0.00
Instream Data
Instream data was reviewed for the period of January 2003- August 2005. Monthly average data
is summarized in the following table. Temperature and dissolved oxygen readings are similar
upstream and downstream. Fecal coliform levels appear lower downstream. Conductivity is
slightly higher downstream of the discharge point.
TEMP
(°C)
DO
(mg/L)
Upstream
Fecal
Coliform
(no./100m1)
Conductivity
(umhos/cm)
TEMP
(°C)
Downstream
Fecal
Coliform
DO (mg/L) (no./100m1)
Conductivity
(umhos/cm)
Avg
Max
Min
13.5
20.6
4.8
10.4
14.5
8.5
453.5
1246.0
89.0
107.1
222.0
90.0
16.4
81.4
5.7
10.4 306.3
14.3 1124.0
7.5 6.0
151.8
387.0
113.0
RPA Analysis
RPAs were performed for the permitted parameters cadmium, copper, cyanide, silver, and zinc.
The facility has violated its permit limit for both cadmium and cyanide, therefore the limit will
remain in the permit.
The facility's data showed a reasonable potential to exceed water quality standards for copper,
silver and zinc, however these are action level parameters. Since the facility has been passing
WET tests, limits for these parameters will not be included in the permit.
RPAs were also performed for arsenic, chromium, lead, mercury, molybdenum, nickel, and
selenium based on LTMP data. No parameters showed potential to exceed water quality
standards. All parameters will continue to be monitored as part of the LTMP.
WET Test Results
The Corpening Creek WWTP has a chronic WET testing requirement at 67% effluent
concentration. The facility has passed 21/22 WET tests administered since February 2001
Correspondence File Review/Compliance History
From January 2002 to July 2005, the Corpening Creek WWTP has incurred the following permit
limit violations:
> 11 violations of BOD limits (7 weekly average, 4 monthly average)
> 1 violation of the weekly average cadmium limit

NPDES Permit Fact Sheet — 12/06/05 City of Marion — Corpening Creek WWTP
Page 3
> 2 violations of weekly geometric mean fecal coliform limit
> 12 violations of cyanide limits (2 daily maximum, 10 weekly average)
> 8 violations of the daily minimum D.O. limit.
> 20 violations of TSS limits (13 weekly average, 7 monthly average)
NC0031879
These violations have resulted in 15 enforcement cases and $22,223.88 in civil penalties (after
remissions). The facility is currently on EPA's watchlist for having more than 25 violations ina
two-year period.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: December 7, 2005
Permit Scheduled to Issue: February, 1 2005
5.0 State Contact Information
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature
Date
Regional Office Comments:
Regional Recommendation by:
Signature
Date
Reviewed and accepted by:
Regional Supervisor:
Signature
Date
NPDES Unit Supervisor:
Signature
Date

REASONABLE POTENTIAL ANALYSIS
City of Marion/ Corpening Creek
NC0031879
Time Period 2002-2005
Ow (MGD) 3
7010S (cis) 2.3
7010W (as) 3.6
3002 (cfs) 4.6
Avg. Stream Flow, OA (cfs) 12
Rec'ving Stream Corpening Creek
WWTP Class IV
IWC (%) 0 7010S 66.906
® 7010W 56.364
0 3002 50.27
0 OA 27.928
Stream Class C
Outfall 001
Qw = 3 MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA <)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS/ Si FAV/
Monk Acerb
n it Da liar Prod Ay Moab?* Cw
Cadmium
NC
2 15
ug/L
200 9
7.2
Acute: 15
______________________
Chronic 3 .
_____
Violated current cadmium timlt during permit cycle
Retain limit
Copper
NC
7.0 AL 7.3
ug/l.
89 68
277.2
Acute: 7
__ _ _ _____
Chronic 10 •
_ _ _ _ _ ___________________ _
Action level parameter
Retain monitoring'
Cyanide
NC
5 N 22
10
ug/L
200 42
44.4
Acute: 22
__ _ _ _____
Chronic 7
_ _ _ _ _ _ _ _ _ _ _ ____
Violated current cyanide iimit during permit cycle
Retain limit
Silver
NC
0 AL 1
ug/L
92 7
19.0
Acute: 1
___ ___
Chronic: --- 0 -
_____
Action level parameter --•—•—•---•—•-------
Retain monitoring
Zinc
NC
50 AL 67
ug/L
93 83
1126.9
Acute: 67
•_ _ ____ .__
Chronic:75
_ _ _ _ _ _____ ___ ____ __ __
Action Level parameter
Retain monitoring
Arsenic
C
50
ug/L
14 0
2.5
Acute: N/A
__ _ _-_ _ _
Chronic 179
_ _•_ _ _ _ _ —•—•—•—•—•—•—•—•—
Max predicted «allowable.
Monitored as part of LTMP
Chromium
NC
50 1022
ug/L
14 1
300.6
Acute: 1.022
__ _ _________
_ _ _ _ _ ________________---
win continue to be monitored as part of LTMP
Lead
NC
25 N 33.8
ug/L
14 1
18.9
Acute: 34
_ _ _•______
•Chronic 37
_•_ _ _- _---•—.—•—•_ _•—•—
Max predicted «allowable.
Monitored as part of LTMP
Mercury
NC
12
ng/L
11 0
Note: n<12
Limited data
381.0000
set
Acute: WA
__ _ ________
Chronic:18
_ _ _ _ _ _ _
No detections- alb samples below 0.2 uglL detection limit
Molybdenum
A
3.500
ug/L
14 12
390.0
Acute: N/A
__ _ _- _ _•_
Chronic 6,962
_-_ _ _- _ _ —•—•—•—•—•—•-----
Max predicted «allowable.
Monitored as part of LTMP
Nickel
NC
88 261
ug/L
14 1
65.3
Acute: 261
__ro_c _1_2_
_Maxpr_di_ted_«_allowable_-__-________
Monitored as part of LTMP
Selenium
NC
5 56
ug/L
14 0
28.5
Acute: 56
_ _ _--___—__
•Chronic 7
_ _-_ _•_ _ _ _ _ _ _ —•—•—
No detecttons• ali samples below detection limit -
Vartatton from multiple detection limits
0 0
WA
Acute: N/A
___ ____
Chronic: Error O Type
------------------------------ —
0 0
WA
Acute: N/A
Chronic: Error @Type
----•—•-----------•-------------
0 0
N/A
Acute: N/A
Chronic: Error ®Type
----------•---•—•—•—•—•—•—•—•—•—
Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
•• Freshwater Discharge
31879_rpa.xls. rpa
12/6/2005

July 28, 2004
NCDENR/DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Sir or Madam:
CITY OF MARION
P.O. Drawer 700•
Marion,North Carolina '28�S "*I 4. . • I-: ,..tine ,:..i° ;OFFICE OF THE
'CITY MANAGER
11
AUG 3 2004
DENR - WATER QUALITY
POINT SOURCE BRANCH
Please find attached the permit renewal package for the City of Marion Corpening Creek
Wastewater Treatment Plant, NPDES Permit NC0031879. On behalf of the City of
Marion, I would respectfully request the renewal of this NPDES permit for the City's
Corpening Creek Plant.
If you have any questions, or need any additional information, please contact me at (828)
652-3551 or Larry Carver, the City's Wastewater Treatment Superintendent at (828) 652-
8843.
Thank you for your time and consideration.
Sincerel
Bob Boyette
City Manager
cc: Mayor/City Council
Larry Carver, Wastewater Treatment Superintendent

The City of Marion operates an existing 3.0 MGD wastewater treatment facility
consisting of influent pump station, bar screen, grit removal, primary clarifiers, aeration
basins, lime addition, tertiary filters, gravity sludge thickeners, vacuum sludge filters,
step aeration, and chlorination , located at 3982 hwy 226 south Marion NC in McDowell
county.
The sludge we produce at our facility is land applied as a liquid now so the thickners and
the vacuum filters are used as back ups. All the sludge is hauled and applied by Southern
Soil Builders from roaring river nc. Dennis keys is our contact , his address 958 Hoots
Road, Roaring River NC 28669. 1-800-411-5527
The analysis submitted is from reports already sent to the state

/ / VV/ •a,..• •
CITY OF MARION WASTEWATER TREATMENT PLANT
stsGriu.v aAAa4.1 .
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VOLUMETRIC CAPACITIES
2 Primary Clarifiers ® 0.40 MG, each
2 Aeration Basins ® 0.78 MG, each
2 Secondary Clarifiers ® 0.40 MG, each
2 Sludge Thickening Tanks ® 0.065 MG, each

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FWATF
North Carolina Department of
Environment and Natural Resources
Vw~_� Division of Water Quality
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