NC0030210_Permit Issuance_20040109

NPDES DOCYNENT SCANNIN& COVER SHEET
NPDES Permit:
NC0030210
Charlotte / Mallard Creek WWTP
Document Type:<
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 9, 2004
This document is printed on reuse paper - ignore a.ny
content on the reverse aide

aF WATF�i'
9 4 G
c
7 y
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
•� Alan W. Klimek, P.E., Director
Division of Water Quality
January 9, 2004
Ms. Jackie Jarrell, P.E., Superintendent
Environmental Managemer t. Division
Charlotte -Mecklenburg Igtflla�t=!
4000 Westmont Drive Alf -
Charlotte, ��
North Carolina 28217
i
Subject: NPDES Permit Issuance
Permit No. NCO030210
Mallard Creek WRF
Mecklenburg County
Dear Ms. J
Division personnel have reviewed and approved your application for renewal of the
subject pe it. Accordingly, we are forwarding the attached final NPDES discharge permit.
This permit s 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).
A review of the draft permit revealed the absence of the word "total" for metals listed
on the effluent limitations pages. This error has been corrected in the final permit.
Additionally, based on your comments dated December 12, 2003, the treatment system
inventory or} the supplement to permit cover sheet has been corrected. Furthermore, the
instream monitoring requirements in Part I, Section A, numbers 1 and 2 have been waived in
recognition f CMU's membership in the Yadkin -Pee Dee River Basin Association.
Compliance with all terms and conditions of the attached permit is the responsibility
of the Permi> tee. Please note that T15A 08G .0204 of the North Carolina Administrative Code
has been in erpreted to mean that the Operator in Responsible Charge is responsible for
operation of water pollution control systems.
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 permit shall be final
and binding
Pleas take notice that this permit is not transferable. This permit does not affect the
legal requir�inents to obtain other permits which may be required by the Division of Water
Quality or permits required by the Division of Land Resources, Coastal Area Management Act,
or any other) Federal or Local governmental permits which may be required.
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

Ms. Jarrell, P.E.
Mallard Creek WRIT - NCO030210
Page 2
f3
If you have any questions or need additional information, please do not hesitate to
contact Mark McIntire of my staff at [phone], extension 508.
Sincerely,
ORIGINAL SIGNED BY
Mar c ."imek, P.E.
cc: Central Files
NPDES Unit Files
Mooresville Regional Office
Aquatic Toxicology Unit
EPA Region 4

Permit NCO030210
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 v4th the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulationsl promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Charlotte Mecklenburg Utilities
is hereby authorized to discharge wastewater and stormwater from a facility located at
Mallard Creek Water Reclamation Facility
-US Highway 29
Northeast of Charlotte
Mecklenburg County
to receiving watgrs designated as Mallard Creek in the Yadkin -Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof. i
The permit shall become effective February 1, 2004.
This permit and the authorization to discharge shall expire at midnight on November 30, 2008.
Signed this day January 9, 2004.
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

• t Permit NCO030210
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as'of this 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 condition$, requirements, terms, and provisions included herein.
Charlotte Mecklenburg Utilities
Mallard Creek Water Reclamation Facility
is hereby authorized to:
1. Continue to operate an existing 8.0 MGD wastewater treatment facility located at US
Highway 29, northeast of Charlotte, Mecklenburg County, consisting of:
• influent pump station;
• flow equalization;
• mechanical screening;
• two (2) cyclone grit removal systems;
• two (2) day tanks;
• intermediate pump station;
• five primary clarifiers;
• four (4) circular aeration basins;
• six (6) rectangular aeration basins;
• three (3) final clarifiers;
• tertiary filtration;
• UV disinfection;
• four (4) anaerobic digesters;
• a sludge holding tank;
• a waste thickening centrifuge;
• sludge drying beds; and
• standby power.
2. Aler completion of construction, operate this facility with a design capacity of 12.0
GD.
3. Operate facilities for reclaimed water use of up to 4.0 MGD in accordance with Non-
D�ischarge Permit number WQ0013252.
4. D�scharge from the treatment works described in item one above at the location
s?ecified on the attached map into Mallard Creek, a class C water in the Yadkin -Pee Dee
River Basin.

CM - Mallard Creek WRF - NCO030210 Facility
Location
USGS Quad Name: Harrisburg Lat.: 35°19'52"
Receiving Stream: Mallard Creek Long.: 80°41'54"
Stream Class: C /, Not to SCALE
Subbasin: Yadkin - 030711 Or

V�
Permit NCO030210
Part I - Section A
I. EFFLUENT LIIVIITATIONS AND MONITORING REQUIREMENTS - 8.0 MGD
Beginning on the effective date of this permit and lasting until expansion above 8.0 MGD or permit expiration, the
Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored by the
Permittee as specified below:
I
PARAMETEi
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Avera a
Daily
Maximum
Measurement
Fre uen
Sample
a
Sample
Location'.
Flow (MGD)
8.0
Continuous
Recording
I or E
csoD5, 20oc
(April 1 - October 31)2
4.2 mg/L
6.3 mg/L
Daily
Composite
I, E
CBODS, 200C
(November 1 - Mar h 31)2
8.3 mg/L
12.5 mg/L
Daily
Composite
I, E
Total Suspended So�&2
30.0 mg/L
45.0 mg/L
Daily
Composite
I, E
NH3-N
(April 1 - October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
E
NH3-N
(November 1 - Marfh 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
E
Dissolved Oxygen
(
Daily Average > 6.0 mg/L
Dailyl
Grab
E, U, D
Fecal Colif,
200/100 ml
400/100 ml
Daily
Grab
E
Total Nitrogen
(NO2+NO3+TI{N)
Monthly
Composite
E
Total Phosphorus
Monthly
Composite
E
Temperature, °C
Daily'
Grab
E, U, D
Total Nickel
2/Month
Composite
E
Total Copper
2/Month
Composite
E
Total Zinc
2/Month
Composite
E
Total Mercury
0.013 µg/L
Weekly
Composite
E
pH
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Chronic Toxicity
See Note 3
Quarterly
Composite
E
Notes:
1 E - Effluent, I - Influent, U - Upstream at least 200 feet above the discharge point, D'- Downstream at NCSR
1300 and at NCSR 1304 (Rocky River). Instream monitoring requirements are waived in recognition of the
Permittee's p 'cipation in the Yadkin -Pee Dee River Basin Association. Should membership be terminated,
instream sam ling shall immediately commence with samples taken as grab and collected 3/week during the
months of June, July, August, and September, and weekly during the remaining months of the year.
2 The monthly average effluent CBODs and Total Suspended Solids concentrations shall not exceed 15% of the
respective infl ent value (85% removal).
3 Chronic Toxic ty (Ceriodaphnia) P/F ® 90% February, May, August, November: see Part I, Section A, Number
3 of this Dermt.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.

Permit NCO030210
PART I - SECTION A
2. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - 12.0 MGD
Beginning upon expansion above 8.0 MGD and lasting until permit expiration, the Permittee is authorized to
discharge from OutfaU 001. Such discharges shall be limited and monitored by the Permittee as specified below:
P R
EFFLUENT LIMITATIONS
:.,MONITORING REQUIREMENTS
Monthly
Avere
Weekly
� Aver e
Daily
' Maximum
Measurement
Fre uenc
Sample
a
Sample
Locationl
Flow (MGD)
12.0
Continuous
Recording
I or E
CBOD;, 20°C
(April 1 - October 31)2
4.2 mg/L
6.3 mg/L
Daily
Composite
I, E
CBODS, 200C
(November 1 - March 31)2
8.3 mg/L
12.5 mg/L
Daily
Composite
1, E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I, E
NH3-N
(April 1 - October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
E
NH3-N.
(November 1 - March 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
E
Dissolved Oxygen
Daily Average > 6.0 mg/L
Daily'
Grab
E, U, D
Fecal Coliform
200/100 ml
400/100 ml
Daily
Grab
E
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
E
Total Phosphorus
Monthly
Composite
E
Temperature, °C
Daily'
Grab
E, U, D
Total Nickel
2/Month
Composite
E
Total Copper
2/Month
Composite
E
Total Zinc
2/Month
Composite
E
Total Mercury
0.012 µg/L
Weekly
Composite
E
PH
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Chronic Toxicity
See Note 3
Quarterly
Composite
E
Notes:
1 E - Effluent, I - Influent, U - Upstream at least 200 feet above the discharge point, D - Downstream at NCSR
1300 and at NCSR 1304 (Rocky River). Instream monitoring requirements are waived in recognition of the
Permittee's participation in the Yadkin -Pee Dee River Basin Association. Should membership be terminated,
instream sampling shall immediately commence with samples taken as grab and collected 3/week during the
months of June, July, August, and September, and weekly during the remaining months of the year.
2 The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
3 Chronic Toxicity (Ceriodaphnia) P/F ® 90% February, May, August, November; see Part I, Section A, Number
3 of this permit.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.

1 Permit NCO030210
L D
PART I - SECTION A
3 — L 001
CHRONIC TOBICITY PERMIT LIIVIIT (QUARTERLY) OUTFAL
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubid at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaptinia 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 Ifor multiple concentration tests will be determined using the geometric mean of the highest
concentration haviog 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 Tox city 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 ( 11-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results ajid THP313 for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water (,duality
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/res onse 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 thq following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
(,duality 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 NCO030210
is
PART I - SECTION A
4. EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in
accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer,
winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed
as "total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive
as provided by the appropriate analytical procedure.
Ammonia (as N)
Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Total Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalene
Total Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachloroethylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1, 1, 1 -trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium .
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury
P-chloro-m-creso
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydrazine
Thallium
4,6-dinitro-o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Voialfle organic compounds:
Pentachlorophenol
Hexachlorocyclo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-trichlorophenol
lndeno(1,2,3-cd)pyrene
Benzene
Base -neutral compounds:
Isophorone
Bromoform
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodimethylamine
Chloroethane
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethylvinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-trichlorobenzene
1, l -dichloroethane
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
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.

J�`S� TFS.
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
i e ATLANTA FEDERAL CENTER
;Fti 102 61 FORSYTH STREET
r�( PROTE� ATLANTA, GEORGIA 30303-8960
DEC 1 1 2003
Mr. Mark McIntire
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permit
Mallard Creek WWTP
Permit No. NCO030210
Dear Mr. McIntire:
In accordance with the EPA/NCDENR MOA, we have completed review of the draft permit
referenced above and have no comments. We request that we be afforded an additional review
opportunity only if significant changes are made to the draft permit prior to issuance or if significant
comments objecting to it are received. Otherwise, please send us one copy of the final permit when
issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
Internet Address (URL) . http://www.epa.gov
RecycleMiacyclahle .Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30GA Poslconsumer)

December 12, 2003
Mr. Mark McIntire, P.E.
NPDES Unit
Division of Water Quality
NCDENR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
•
CHARLOTTE.
DEC 18
Subject: Comments on Draft Permit, NPDES Permit No. NCO030210, Charlotte Mecklenburg Utilities, Mallard Creek WRF
Dear Mark:
We received the draft permit for the Mallard Creek Water Reclamation Facility on November 14, 2003. We have reviewed the
permit and following are our comments:
1. We maintain a sodium hypochlorite system for the reuse system at this plant. I understand that we have a separate
permit for reuse. However, should this information be included in bullet #5 of the cover page?
2. Equipment Inventory: Here is a summary of additions/corrections:
a. Manual bar screens — we do not have manual bar screens. As part of the expansion of the plant, we are
currently operating mechanical bar screens and two cyclone grit removal systems
b. As of the plant expansion, we have two day tanks with a capacity of 500,000 gallons each
c. As part of the plant expansion, an intermediate pump station was added in addition to the existing influent
pump station
d. We currently have five primary clarifiers (two are on standby) instead of three
e. There are four existing rectangular aeration basins, four existing circular aeration basins and two new
rectangular aeration basins. There are three treatment trains. Train one and two have two rectangular and
two circular each. Train 3 has only rectangular.
f. We currently have three final clarifiers as a result of the plant expansion instead two
g. We do not have any aerobic digestors
h. We have four anaerobic digestors
i. We have one waste thickening centrifuge
j. We have flow equalization facilities
Please note that at the time we first applied for this permit that most of these items were not in service. However,
although we have not settled on a date of substantial completion with the contractor, we are operating this equipment and
process units. 1 don't know the best way to list this equipment since it is technically not accepted yet.
3. As of August 15, 2003, we received a permit modification for instream sampling requirements from the Division of
Water Quality. I have attached a copy of the letter for your records. We are currently a member of the Yadkin Pee -
Dee River Basin Association and entered into a Memorandum of Agreement with the Division for instream sampling
requirements. Please modify the footnote #1 in Part I Section A, to the MCA requirements.
Please let me know if there is any other additional information that we can provide to assist you in reviewing this request. I can be
reached at [phone] ext. 238. Thank you and we look forward to hearing from you soon.
Sincerely,
� A
Jcquelme A. Jarrell, P.
Environmental Management Division Supt.
C: Doug Bean
file
CHARLOTTE-MECKLENBURG UTILITIES
Environmental Management Division 4000 Westmont Drive
Charlotte, NC 28217
PH: 704/357-1344

J tQLC UI Ivulul gal Unna
Department of Environment
1 and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
August 15, 2003
Barry Gullet
Charlotte -Mecklenburg Utilities
12400 Highway 29 North
Charlotte, NC 28262
Ah
ffil
Ski
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RE50URCE5
Subject: Yadkin Pee -Dee River Basin Memorandum of Agreement
NPDES Permit Modification for Instream Sampling
Permit NCO030210 / Mallard Creek WWTP
Dear NPDES Permittee:
As a participant in the Yadkin Pee- ee River Basin Association, your facility entered an agreement with the Division that
provides both parties with an effective environmental monitoring tool. By this letter, the Division is waiving the instream
monitoring requirements specified within the subject permit as of July 1, 2003. The Memorandum of Agreement (MOA)
(signed by the representatives of the Division and your facility) identifies the stations, parametric coverage and frequency of
analysis required for the sampling program that will be conducted by the Yadkin Pee -Dee River Basin Association for its
members.
All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit modification
is issued under the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S. Environmental Protection Agency dated May 9, 1994 (and as subsequently amended).
I would like to express my gratitude for the cooperation of all participants in this innovative approach to environmental
monitoring. It is expected that the results of the agreement will effectively contribute to our understanding of the Yadkin
Pee -Dee River Basin ecosystem.
We have designated Lauren Elmore as our primary contact for issues related to the MCA. She can be reached at the
telephone number or e-mail address listed below. We encourage you to contact Ms. Elmore should any questions arise
regarding the monitoring program. As specified in the MOA, you must notify the Division immediately upon termination of
membership in the MCA. Notify Ms. Elmore and Ms. Vanessa Manuel of the Division's Point Source Compliance and
Enforcement Unit at [phone], extension 532 or via e-mail [[e-mail]]. Should your membership
be terminated, the instream monitoring requirements specified in the subject permit will be reinstated
We will maintain our own set of monitoring stations in the basin. Data from the combined monitoring programs will greatly
expand our knowledge of this ecosystem. We thank you again for your participation and look forward to continuing a
successful monitoring program.
Sincerel ,�77
7
,11 —Alan. W. Klimek Rn,
(DEW
cc: Central Piles
Mooresville Regional Office
NPDES File SEP — 2 P01)3
1621 Mail Service Center, Raleigh, North Carolina 27699-1621 919 733-9960, extension 206
VISIT us ON THE INTERNET @ ht1p://h2o.encslale.nc.us/ [e-mail]
C,C)
C7c^ii 38i- 3`1Li�

North Carolina ) as
Mecklenburg County)
NCDENR/DWD/BUDGET OFFICE
ACCOUNTS PAYABLE
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RALEIGH NC 27699-1617
The Knight Publishing Co., Inc.
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P�xwpiYlmrµ llAxncsaorr CownucsieWNPOES Uerr
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Musx, NC 2/6a�161y
Nolmunow or Wtamm GvicA NPDES WAsrtwAtm Pmurr,
The Flcoa Power GBnmath InciPo. Box 616, ifo, NC High
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appied for ;nevrW of NPDE3 ppeerrm6 N todf,,,i for the Hgh Pock
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avough mdhg watei t0 uq V;,dWn Hlwr m tna red4i1 Poe6ee iNwr
BMIn. ns 65<hage may amen h tore albcotiono In the Portion oftab
Yadwn f en Ro,ef Basin.
I The Clry of Mprice, North Camlina has applies for rtv�ewal of NPDES
permit 1 for its John Glenn Mter Toniono a Plarrt in Union
Coiulty. Thal 14 is pe 41ord 1p dschorgo treatod filter badsh
water hqn aye ouGall Imo Sewads Gaek in the YWWrvPee Doe wrv.
' at Basin. Curtently, low ruslduol chorine is water quality iinhhod. TMs
discharge may aRecl Wnuu albralbnsm tltls Purtlon of tfie watershed.
IP46TKd3
AD SPACE: 220 LINE
FILED ON: 11/11/03 I
_-._____________4 ________________________..
NAME: ..C�-c..� [iw �r.—� TITLE: �C u— 04r IC
DATE: III
In Testimony Whereof I have hereunto set my hand and affixed my seal, the
day and y ar aforesaid. �-�t�
Notar v✓'X' —lay Commission Expires:
COilUlY WOn EOIRM MW 27

The Charlotte Post Publishing Company INVOICE
P.O.Box 30144
Charlotte, NC 28230
[phone]
Invoice No. ABC-158s45-XY2
Invoice Ending Date 11/06/03
ACCOUNT NO. 000001947
NC Dept of Natural Resources
Attri -Valery Stephens - NOV 1 2 NO3
1617 Mail Service Center
Raleigh, NC 27699-1617
ALL INVOICE BALANCES ARE NET
TERMS
30 days
DATE
oty.
TYPE
DESCRIPTION
UNIT PRICE
EXTENDED
11/05/03
409.00
wits
public notice char -mock utilities
0.70
286.30
COMMENTS
SUBTOTAL
286.30
Thank you for prompt remittance.
To ensure proper credit - please enclosed top pert
of Invoice with payment. Thank you.
EMAIL: business Othecherlotlepost.com
SALES TAX
0.00
MISC.
0.00
INVOICE TOTAL
286.30
PUBLIC NOTICE
SPATE OF N(1RTII CAP A
ENVfRO M'ALM GEAIENE
COMA ISSIOM1 no UNLT
l61>M LSE CP. CENTER
RA ,NC 27699
NOIIFIG\TIONOEINnMl0NI NI'DES
wASI6'N'Al}A P6R\VI'f
On me Rod. of in.mugh cuff review and
application of NC Defend Some 143.21,
Public law 92-500andmhcr lawtoLstandools
and regulations: the North Carolina
Environmental Management Commission
proposes m loo. at Notional Pollutant
Dn,,harge Elimiamom System (NPDFS)
wasuwmer discharge permit in the Person(s)
listedbelowcdective ed days from the
Publish date of this notice.
Worn commems agardim, the proposed
pmmm will beaccepval until.3odaysaferthe
publish dam of this native. All c..-'a
received Prior to that date we considered in
if. final determinations regaNing the
pmgrscd permit. The Director of the NC
Division of Water Quality may decide to hold
a public meeting for We proposed permit
should the Division receive a. sigld6cmt
degree of public infine9. _
Copies of die draft proan and other
,option, information on File .soil to
demmdne conditionspresent in the draft
permit too available -upon namoo. and
Payment of tile mrnl of mpmduction. Mail
cumments mill., requests for information to
the NC Division of Water Quality an Ibe
arose address or .It Ms. Vinery Stephens as
(9191 733-5083, emensio, 520. Please
include the NPDE3 Penn number(wooluc )
n, any cn cation. Interested person
may also visit the Division of Water Quality
at 512 N. Salisbury Shoat, Raleigh. NC.
27604-1148 bctwmn the hours of &W rem..'
.it 5:00 pm m.¢view Cartooning we131e.
Charlotte Mecklenburg Utilities. 4000
Wemmoom Drive. Chmlmle,_NC 28217, has
applied for renewal of its NPUES pemmt for
11m mallmd Creek Water Reclamation
feediry. The hi is esmeemly pedon-rd
diwaso,e is maximum of B.OMGD or moved
wastewater to Mallard Creek.. class C water
in the Yadkin -Pee Do, River Bash. BOD.
.mmmmn, and meKnry, ore eunently wmef
quality iimfmd. This discharge may minor
Jahn, allocation of the receiving seemn.
Charlotte Mecklenburg Utilities, 51W
Bmokshim Boulevard. Chaddi NC 28216,
has applied for a modification in Nisom
pemmt NM36277, to eapvM the disch okc
of Reared wmrewmcr from its. McDowell
Creek W".. This facility discharges to
McDowell Creek in the Catawba Rive,
Bvia.sides vmv. art wars quality
SndwL
Livings... Coming Corporation
WC0086002) has applied for renewal of Its
fnrntil discharging to an unnamed vib.mry
of Long heck within the Catawba Rircr
Bain. The paramerec Total Nickel, is water
quality limited. This discharge may dmal
future allocalmor to this madving dream.

imap://[e-mail]:14...
Subject: comments re Mallard Creek WWTP, NCO030210
From: [e-mail]
Date: Wed, 03 IDec 2003 15:36:23 -0500
To: Mark McIntire <[e-mail]>
CC: [e-mail]
will you be �ble to respond soon so we can resolve these and get you a
no comment letter? thanks Marshall
Application:Ij
1. Pg. 10 of the permit appl shows a daily max value for nickel of 96
ug/1 based on 212 samples. The RP summary table in your fact sheet
shows the max predicted value to be 7.9 ug/l. Apparently, the 96 ug/l
value wasn't used. Why not?
2. Pg. 10 of the permit appl shows a daily max value for selenium of
5.6 ug/l based on 161 samples. NC's numeric criterion is 5 ug/l. The
fact sheet des not indicate that an RP analysis was conducted for this
parameter. Because the 7Q10 for the receiving stream is close to zero,
it seems that RP could exist for this parameter and that a limit may be
needed. Plslexplain.
3. The factjsheet and application do not discuss the existence of a
pretreatment program. Is there one?
Permit:
4. It's interesting to me that this permit is expressed as CBOD5. Most
NC permits that I see are BOD5. Why is this one different?
5. For the metals in Parts I.A.1 and 2, they should be expressed as
"total" or "total recoverable" to be consistent with 40 CFR Part 122.45
(c) .
I
1 of 1 1/6/2004 8:17 AM

... �; °imap:/[e-mail]:14...
r ,
Subject: Re: comments re Mallard Creek WWTP, NCO030210
From: [e-mail]
Date: Thu, 11 Dec 2003 15:10:27 -0500
To: Mark McIntire <[e-mail]>
thanks for addressing my concerns - I'm satisfied. I'll send a no
comment letter. how are you feeling? Marshall
1 of 1 12/11/2003 3:56 PM

Subject: Re: comments re Mallard Creek WWTP, NCO030210
From: Mark McIntire <[e-mail]
'Date: Thu, 11 Dec 2003 10:49:35 -0500
To: [e-mail]
Ok, I think I've got all these addressed.
In terms of the data submitted on the DMRs, they were probably reporting five
years of data. My rule of thumb for doing RPAs for municipal facilities is
generally to use no more than 3 years of data. Recognizing that SIUs and
non -permitted commercial/industrial facilities change over the life of a municipal
facility's permit cycle, I think 3 years constitutes a representative discharge.
During the past three years, selenium was never detected and the maximum reported
nickel concentration was 6.2 ug/L. Using this data, an RPA for selenium isn't
necessary and there is no reasonable potential for nickel.
Not providing a discussion of Mallard's pretreatment program was an oversight on
my part. All of their LTMP data is reported on their DMRs. I'll ammend the fact
sheet with a discussion of the pretreatment program.
Regarding CBOD, the secondary treatment regs. in 40 CFR allow for the inclusion of
a CBOD limit should the facility request such. The facility requested this
distinction some time ago. Thus the reason for a limit less than 5.0 mg/L.
The effluent limitations pages will be modified to include "total" metal.
Hope this helps.
Mark
[e-mail] wrote:
will you be able to respond soon so we can resolve these and get you a
no comment letter? thanks Marshall
Application:
1. Pg. 10 of the permit appl shows a daily max value for nickel of 96
ug/l based on 212 samples. The RP summary table in your fact sheet
shows the max predicted value to be 7.9 ug/l. Apparently, the 96 ug/1
value wasn't used. Why not?
2. Pg. 10 of the permit appl shows a daily max value for selenium of
5.6 ug/l based on 161 samples. NC's numeric criterion is 5 ug/l. The
fact sheet does not indicate that an RP analysis was conducted for this
parameter. Because the 7Q10 for the receiving stream is close to zero,
it seems that RP could exist for this parameter and that a limit may be
needed. Pls explain.
3. The fact sheet and application do not discuss the existence of a
pretreatment program. Is there one?
Permit:
4. It's interesting to me that this permit is expressed as CBOD5. Most
NC permits that I see are BOD5. Why is this one different?
5. For the metals in Parts I.A.1 and 2, they should be expressed as
"total" or "total recoverable" to be consistent with 40 CFR Part 122.45
(c) .
1 of 2 12/11/2003 3:55 PM

imap://[e-mail]: 14...
A •.
z•
Subject: comments re Mallard Creek WWTP, NCO030210
From: [e-mail]
Date: Wed, 03 Diec 2003 15:36:23 -0500
To: Mark McIntire <[e-mail]>
CC: [e-mail]
will you be able to respond soon so we can resolve these and get you a
no comment letter? thanks Marshall
Application:
1. Pg. 10 of the permit appl shows a daily max value for nickel of 96
ug/l based on 212 samples. The RP summary table in your fact sheet
shows the max redicted value to be 7.9 ug/l. Apparently, the 96 ug/1
value wasn't used. Why not?
2. Pg. 10 of Ithe permit appl shows a daily max value for selenium of
5.6 ug/1 based on 161 samples. NC's numeric criterion is 5 ug/l. The
fact sheet does not indicate that an RP analysis was conducted for this
parameter. Blecause the 7Q10 for the receiving stream is close to zero,
it seems that RP could exist for this parameter and that a limit may be
needed. Pls explain.
i
3. The fact sheet and application do not discuss the existence of a
pretreatment grogram. Is there one?
Permit:
4. It's interlesting tome that this permit is. expressed as CBOD5. Most
NC permits that I see are BOD5. Why is this one different?
5. For the metals in Parts I.A.1 and 2, they should be expressed as
"total" or "total recoverable" to be consistent with 40 CFR Part 122.45
(c) .
1 of 1 12/11/2003 3:53 PM

October 29, 2003
NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Charlotte Mecklenburg Utilities
Mallard Creek Water Reclamation Facility
NPDES Permit Number NCO030210
1 T,.. -
:�+++�.:.Sil A.�_.' '- ana.waiifw:
ly CI �+f ,_„Y1:F'"33 i x _ !�■/".-".^ -. ..` �c ij� r � 1 .- '.% 1 � 7.'�t � � .�
F
I ., ._... •.i.. Fes,••.....«.✓'.. �+_. :e:.. .. ... r w
(D FacilitNne� _
CM_U-MallardCreek Water Reclamation Facility-�_-�-_
(2.) Permitted t1ow (MGD):
8.0 phased to 12.0
6. Coun :
Mecklenburg
3.) FaciliClAss:
N
(7.) Regional Office:
Mooresville
- (4.) Pretreatme t Pro am:
--
Complete -��---
.USGS To-po Quad:
F16SW
5. Permit Sta , s:
Renewal
9. USGS Quad Name:
Harrisburg
..xs. -. 1... k �"--A.
�.."^"s...
:, � +]•��i�./���y..y..�x,. n�.y,�
p�y� .n/1� '>-x...,t ('h � �.3S�..-7--� �
� � 7 -�' v`7"'�.�'°�-}`�--`--..._
1. Receiving Stream:
-
Mallard Creek --
7. Drainage Area CmV)-.
37.5
2. Sub -basin:
1
03-07-11
(8. Summer 7Q10 cfs :
0.64
3. Stream Ind
x Number:
13-17-5 9/1/1974
9. Winter 7Q10 cfs :
2.1
4. Stream Cla
sification:
C
10. 30Q2 cfs :
2.9
5. 303(d Status•---
6. 305 Status:
- -
Not Listed �- - -_
Supporting
-11 Average Flow. (c�-:__--
12. IWC %:
_41.0
94% (capped at 90%
DEVELOPMENT
1.1 Supplement to Cover Page
• Deleted reference to 6.0 MGD - facility now at 8.0 MGD;
• Deleted reference to trickling filters as they've been taken off line;
• Modified the reuse language to reference non -discharge permit number WQ0013252.
1.2 Efflu nt Limitations & Monitoring Requirements
• Deleted 6.0 MGD effluent page;
• Added weekly average NH3-N limitations for both 8.0 and 12.0 MGD flows;
• Deleted monitoring requirements for cyanide, chromium, arsenic, silver, conductivity,
and residual chlorine;
• Deleted limitation and monitoring requirements for cadmium and lead;
• Deleted effluent limitations page for outfall 002.
1.3 Special Conditions
• Modified the chronic toxicity language in accordance with the August 5, 1999
memorandum from DWQ's Aquatic Toxicology Unit (attached);
• Included the priority pollutant analysis condition.
2.0 BACKGROUND
This is a permit renewal for a major municipal wastewater treatment facility with a current
facility design and permitted flow of 8.0 MGD with a discharge to Mallard Creek in the Yadkin -
Pee Dee River Basin.

NPDES Permit Fact Sheet - October 29, 2003 CMU-Mallard Creek WRF
Page 2 NCO030210
This facility serves an approximate population of 53,000 in northeastern Mecklenburg County
on the boarder with Cabarrus County. In addition to discharging via NPDES permit number
NCO030210,' this facility serves as a reclaimed water distribution facility under non -discharge
permit WQ0013252, providing up to 4.0 MGD of reclaimed water for landscape irrigation.
i
i
3.0 FACILITY INFORMATION
3.1 Wastewater Treatment
Current wastewater treatment facilities consist of an influent pump station, dual mechanical
bar screens, aerated grit chambers, three primary clarifiers, two aeration basins associated with
four anaerobic chambers for BPR, two aeration basins, two final clarifiers, dual tertiary filters,
UV disinfection, anaerobic digestion, centrifuge de -watering, sludge drying beds, and standby
power.
An Authorization to Construct was issued on March 5, 1999 authorizing expansion to 12.0
MGD. Futur� treatment components will include larger mechanical bar screens, replacement of
influent pumps, new vortex grit chambers, a flow equalization basin for plant drains, conversion
of the existing out -of -service polishing pond to a lined 5.0 million gallon flow equalization basin
with floating aerators, a new intermediate pumping station, a new primary clarifier, a new 4
MGD activated sludge train with anoxic treatment, a new secondary clarifier, chemical feed
facilities for alkalinity addition, two new effluent filtration basins, additional UV disinfection
facilities, a hew anaerobic digester, additional centrifuges for WAS thickening and digested
biosolids de -watering, a new 2,000 kW standby power generator, and new plant controls.
Class B biosolids are land applied in accordance with land application permit number
WQ0000057.
3.2 Compliance Summary
A compliance download was conducted from DWQ's Basinwide Information Management System
for the period January 2001 through August 2003. Numerous violations were noted for the
2001 calendar year. No violations were noted for 2002 or 2003. Furthermore, a review of the
facility's efflu nt data for the most recent two years indicates excellent treatment.
4.0 PERMIT DEVELOPMENT
The previously issued permit contained effluent limitations for three permitted flows (6.0, 8.0,
and 12.0 MGD). The facility was rerated to 8.0 MGD during the previous permit cycle. As such,
the effluent limitations page for 6.0 MGD has been deleted.
In accordance with new permitting strategy for conjunctive use facilities, the effluent limitations
page for the reuse water (outfall 002) has been deleted. Reference to the appropriate WQ permit
has been made on the Supplement to Permit Cover Sheet.
New permitting strategy necessitates the installation of weekly average ammonia limits at
flows. Weekly average limitations equal to 3X the monthly average limits have been installed.
The back-up i chlorine disinfection facilities have been taken out of service. As such, all
monitoring requirements for TRC have been deleted.

NPDES Permit Fact Sheet - October 29, 2003
Page 3
CMU-Mallard Creek WRF
NCO030210
Effluent data for toxicants was reviewed for the period January 2001 through August 2003. All
data for cadmium, lead, cyanide, chromium, arsenic, and silver was reported as non -detect. As
such, monitoring for these parameters has been deleted from the NPDES permit. Monitoring will
be maintained; in the facility's LTMP administered under its pretreatment program. Reasonable
potential analyses were conducted for copper, zinc, and nickel (attached). The results of these
analyses are summarized in the table below.
Parameter ;
Allowable Acute
Allowable Chronic
Max. Predicted
Nickel ( /L)
261
97.8
7.9
Copper ( /Li
7.3
7.8
29
Zinc ( /L)
67
55.6
87
As can be seeo in the table, there is no reasonable potential for a nickel standard violation. As
such, no limi , tion is necessary. Monitoring will be maintained. While copper and zinc both
exhibit reasonable potential for an action level violation, because the facility is passing its whole
effluent toxicity tests, in accordance with current permitting strategy, no limitations are
necessary at this time. Should the presence of copper and zinc in the effluent be identified as
causative factors of whole effluent toxicity, limitations will be installed. A reasonable potential
analysis was not completed for mercury. The facility detected mercury in its effluent in 2001 at
0.4 µg/L. Because of this detection, reasonable potential exists for a standard violation. As
such, mercury Ilimitations will be maintained.
In line with recent changes to municipal facility permitting, the annual pollutant analysis has
been included as a special condition.
5.0 PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: November 12, 2003
Permit Scheduled to Issue: December 29, 2003
6.0 STATE CONTACT
If you have any questions on any of the above information or on the attached permit, please
contact Mark McIntire at [phone], extension 508.
Copies of the following are attached to provide further information on the permit development:
• RPAs
• Compliance Pull
• Tox. Memo
• Draft Permit
VILI14 C
BY:
Signature
Date
REGIONAL RECO111i1HlENDATION BY:
Signature Date

REASONABLE POTENTIAL ANALYSIS
Summary for Outfall 001
Time Period Jan 2002 -, Aug 2003
Ow (MGD) 6.000
WWTP Class IV
7010S (cfs) 0.64
/WC (%) 0 7010S 90.0 94
701OW (cfs) 2.1
0 701OW 82
3002 (cfs) 2.9
@ 3002 76
Stream Flow, QA (cfs) 41
@ QA NIA 18.4891
Rec'ving Stream Mallard Creek
Stream Class C
CMUD - Mallard Creek
N CO030210
STDS.
&
PARAMETER
TYPE'
CRIT
RIA "
PQL
REASONABLE POTENTIAL RESULTS
PRELIM. RESULTS
RECOMMENDED ACTION
W "S I.
Aetd9 /
A / Dot 0. Pried C, V"vb o CW
(ftwt)
A FAV
Acute 261.0
Maintain monitoring
Nickel
NC
88.0
261
0.5
115 77
7.9
REMOVE?
No limit necessary at this time
rnFAv
rngrt
_ _ _ _ _
--Chromic 9Z8-
--- ----- ----
--- — — —----------- — — —
nOn Trt1Ut
REMOVE?
Acute 7.3
Maintain monitoring
Copper
NC
7 (I
) 7.3
2
116 99
29
l _
DAILY MAX. LIMIT
No limit as this is an action level parameter
_ _ _ _
Chronic---7.778
---------------
------------------- ----- -
WK. AVG. LIMIT
Acute 67
Maintain monitoring
Zinc
NC
50 i
L) 67
10
116 107
87
DAILY MAX. LIMIT
No limit as this Is an action level parameter
------------
Chronic 55:558
---------------
------------------------------
WK. AVG. LIMIT
Legend. Freshwater Discharge
C = Carcinogenic
NC = Non-ca(�nogenic
A = Aesthetfd
i
30210 rpa, rpa
10/28/03

REASONABLE POTENTIAL ANALYSIS
XMI0
n Deb Data DOV
1 e 2
2 3.4
3 22
4 2A
6 4.1
6 < 2
7 6A
0 33
0 3.a
0 fa
1 2.7
2 20
3 1.9:
4 4.2
a 3.5
0 43
7 3.6
6 32
9 < 2 1
0 33
7 3'5
2 3'4
3 3.1
4 10
5 3e
6 1.1
7 4.1
6 36
9 3A
0 < 2
it i.o
2 4
3 a.o
4 4
5 4.6
0 6
7 4.1
s 3.5
0 3.1
0 4.3
1 11
2 4.6
3 6.6
4 43
5 44
6 3.7
7 3.7
6 a3
9 4.1
o ae
1 3
2 34
3 2.a
1 3.6
5 3.2
6 < 2
7 32
5 20
9 23
0 3.6
1 36
2 2.7
3 27
4 3.6
5 3.1
8 3.1
7 26
e 64
9 c 2
0 2
1 < 2
2 < 2
3 2.2
1 3.5
6 < 2
a c 2
7 24
e 2.7
o a
D 1
1 2.9
2 2.3
7 2.6
1 17
S 2.3
5 21
7 2.1
e 2t
D 2/
D < 2
1 < 2
2 2.7
i 23
4 20
S 26
r 32
1 < 2
D 29
D 3
I 2.3
z < 2
i as
1 26
S 2.4
S < 2
r 4.6
! 3.4
i 3
D 2.7
I 3.8
z 4
i 62
1 7
S 2
1 2
thtb.
�tAOI Rae411u
- 1.0 Sid Dow*
2.87
3.4 Mon 3b
22: C.V. 0.752
2.4 n its
4.1
1.0 MW Faemr. 1.46
SA MM. Vaal 20.0 UDl
33 Max Rod Ow 292 V0
33
13.0
27
20.0
&D
42
36
4.3
3.6
32
1.0
3a
3.5
3A
3.4
4.9
3s
4.1
4.t
3A
3.5
lA
39
4.0
OA
4.0
4.5
6.0
4.1
3.5
3.1
43
11.0
4.8
5.6
4.3
4.5
a.7
3.7
3S
4.1
34
3A
a.4
26
3.8
32
1.0
32
20
22
3A
3.5
27
2.7
34
3.1
3.1
2.5
A4
/A
to
1.0o I l
22
3.5
to
1.0
24
27
%9
23
2.5
11.0
25
24
2.5
2.1
24
IA
1A
2.7
2.3
2.9
2s
ad
32
1A
29
aA
2.3
1.0
2.5
25
2.4
1.0
4.6
14
3.0
27
38
4.0
5.2
7.0
2A
1.0
®
w
2..
Ihib ■
a Dab
Data
SDL■V20L UIU
1
< 2
:.- -. 1.0 Std 00%
0.92
2
< 2
:--1.0 Mtan
2.1
3
< 2
1.9 C.V.
0.442
4
s 2
1.0 n
Its
a
23
23
3
3.2
32 W Fads.
1.27
7
2.5
- - 25 Max Valve
62 pw
5
< 2
to Max Red 0w
72 Ilpl
D
3.1
- 3.1
D
< 2
'3.0
1
3.2
32
2
2.2
;: 22
3
25
25
1
2.2
22
S
2.2
22
6
2A
2A
2.1
' 21
!
< 2
1.0
D
< z
D
< 2
1.0
l
< 2
_:1.0
z
21
2.1
D
2.3
::23
1
25...
:,. -:25
S
2.3
2.3
1
25
25
r
23
2.3
1
< 2
lA
>
c 2
1A
23
23
1
2
20
1
27
:..2.7
{
2
20
S
3,15
3-S
s
3
3.0
r
2.0
29
!
2
20
i
3.9
39
1
2A
29
1
21
:... 21
1
2.7
27
!
14
2.4
1
2.3 -
" 2.3
s
3.4
3.4
1
21
21
r
as
25
1
2.1
21
>
27
27
1
22
22
1
22
22
r
ad
26
1
3
.3.0
1
< 2
1.0
i
2.1
21
{
< 2
to
I
25
25
1
21
21
i
< 2
lA
1
< 2
fA
I
< 2
lA
< 2
1.0
< 2
IA
1
< 2...".1.0
i
< 2'1.0
21
2.1
I
< 2
1.0
I
< 2
1.0
I
s 2
1.0
1
< 2
lA
21
21
!
< 2
1.0
I
6.2
62
I
< 2
1.0
< 2
_-1.0
{
20
.20
20
20
I
26
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MEMORANDUM
TO:
THROUGH:
FROM:
SUBJECT:
Division of Water Quality
August 5, 1999
Dave Goodrich
Matt Matthews
Kristie Robeson
NPDES Permit Modifications
Revised Chronic Toxicity Language
r
Due W recent discussions with EPA Region IV, the Division is further modifying its
Whole Effluent Toxicity Enforcement Policy. Therefore, the -chronic toxicity language to be
used in permts will once again change. Listed below are the nine facilities that currently have
a Phase II ch�onic toxicity testing requirement in their NPDES permits. Our office previously
sent you a memo dated 5/10/99 requesting modification of these nine permits to include the
new chronic �oxicity language. However, through discussions with EPA, our office was told
that they wo ld not approve permits which contained that toxicity language. The chronic
language has since been revised and approved by EPA Region IV. Our office now
recommends modifying the permits for the nine facilities listed below to include the revised
permit language for chronic toxicity testing.
CMUD-McAlpine WWTP
NPDES Permit No. NC0024970
Mecklenburg County
CMUD-Mallard Creek WWTP_
NPDES Permit No. SOON=Y
Mecklenburg County
CMUD-McDowell Creek WWTP
NPDES Permit No. NC0036277
Mecklenburg County
Concord Rocky River WWTP
NPDES Permit No. NC0036269
Cabarrus County
Delta Mills
NPDES Permit No. NC0006190
Catawba County
Duke Power -Lincoln Turbine
NPDES Permit No. NCO080781
Lincoln County

Takeda Chemical Products
NPDES Permit No. NCO059234
New Hanover County
Winston-Salem Archie Elledge WWTP
NPDES Permit No. NCO037834
Forsyth County
Winston -Salem -Lower Muddy Creek WWTP
NPDES Permit No. NCO050342
Forsyth County
Please find attached the appropriate chronic toxicity test condition language to be
used in these nine permit modifications. You should also note that this language contains our
new mailing address, which should be used in future toxicity permit language. Should you
have any questions, please feel free to contact me or Matt Matthews at 733-2136.
Attachment
cc: Rex Gleason-MR4
Rick Shiver-WIRO
Larry Coble-WSRO
Colleen Sullins
Shannon Langley -Point Source Compliance/Enforcement Unit

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Charles Weaver
Date: October 13, 2003
NPDES STAFF REPORT AND RECOMMENDATION
MRO No. 03-53
County: Mecklenburg
Permit No. NCO030210
PART I - GENERAL INFORMATION
1. Facility and address: Mallard Creek WWTP
Charlotte Mecklenburg Utilities
4000 Westmont Drive
Charlotte, NC 28217
2. Date of investigation: August 22, 2003
3. Report prepared by: Michael L. Parker
4. Person(s) contacted and telephone number: Jerome Lucky, ORC [phone]
5. Directions to site: From the intersection of Highway 29 and Harris Boulevard travel north
on Highway 29. The entrance to the WWTP is on the right side of Hwy. 29.
6. Discharge point(s). List for all discharge points:
Latitude: 35' 19' 52" Longitude: 80" 41' 54"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on
map.
U.S.G.S. Quad No.: F16SW U.S.G.S. Name: Harrisburg, NC
7. Site size and expansion are consistent with application? There is additional area available
for future expansion (beyond the current expansion), if necessary
Page I

8. Topography (relationship to flood plain included): The WWTP is located on a moderately
sloped site. The facilities were designed for protection from the 100-year flood.
9. Location of nearest dwelling: The nearest dwelling is approximately 500 feet from the site.
10. Receiving stream or affected surface waters: Mallard Creek
a. Classification: C
b. River basin and subbasin no.: Yadkin 030711
C. Describe receiving stream features and pertinent downstream uses: The stream is
approximately 30 to 40 feet wide with sandy to gravel bottom. The downstream uses
appear to be consistent with typical Class C uses.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: CMU will be increasing the permitted flow
from 8 MGD to 12 MGD at outfall 001 upon completion of plant expansion. CMU
is also authorized to discharge up to 3.0 MGD of reuse water through outfall 002.
b. at is the current permitted capacity of the wastewater treatment facility? 8.0 &
12.0 MGD (outfall 001), 3.0 MGD (outfall 002)
C. Actual treatment capacity of the current facility (current design capacity)? 8.0 MGD
(outfall 001)
d. Date(s) and construction activities allowed by previous Authorizations to Construct
issued in the previous two years: The ATC which authorized the construction of the
facilities necessary for expansion of outfall 001 from 8.0 MGD to 12.0 MGD was
ssued on March 5, 1999.
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The current facilities at outfall 001 consist of an influent pump
I
tation, dual mechanical bar screens, aerated grit chambers, 3 primary clarifiers, 2
trickling filters, 2 aeration basins associated with four anaerobic chambers for BPR,
two round aeration basins, two final clarifiers, dual tertiary filters, UV disinfection,
Taerobic digesters, centrifuge dewatering, and sludge drying beds. The back-up
chlorination system has been removed.
There are no additional treatment facilities that serve outfall 002 other than those
described in Part II (e) above.
Page 2

f.
9.
h.
Please provide a description of proposed wastewater treatment facilities: The
proposed WWT facilities necessary for expansion to 12.0 MGD consist of the
following: two (2) mechanically cleaned bar screens, two (2) vortex type grit
chambers, one 1.0 MG day tank with mixers, one (1) 0.125 MG flow EQ basin,
conversion of the existing polishing pond to a lined 5.0 MG flow EQ basin, an
additional primary clarifier, a 4.0 MGD activated sludge treatment basin with
diffused air, an additional secondary clarifier, alkalinity chemical feed facilities, two
(2) effluent filtration basins, additional UV disinfection facilities, an additional
anaerobic digester, centrifuges for WAS thickening, and a 2,000 kW stand-by power
generator.
Possible toxic impacts to surface waters: Industrial wastewater, ammonia
Pretreatment program (POTWs only): This facility has an approved pretreatment
program.
2. Resid s handling and utilization/disposal scheme:
a. ; If residuals are being land applied, please specify DWQ permit no.: WQ000057
i Residuals contractor: Synagro
Telephone No.: 336-766-0328 (main office)
b. Residuals stabilization: The residuals are stabilized in anaerobic digesters,
dewatered, and then stored until disposal. The residuals meet all Class B biosolids
criteria prior to disposal. If Class B criteria cannot be met, the residuals are taken to
various landfills permitted by the Division of Solid Waste for disposal.
C. Landfill: Grit chamber residuals and bar screenings are hauled to a BFI landfill.
3. Treatment plant classification: Class IV.
4. SIC Code(s): 4952 Wastewater Code(s): 01 Main Treatment Unit Code: 01103
(current operation)
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? Public monies were used in the construction of the existing
WW1 facility and the current expansion.
2. Special monitoring or limitations (including toxicity) requests: None at this time.
Page 3

3. Important SOC, JOC or Compliance Schedule dates: This facility is not under a SOC/JOC
nor is Ithere a compliance schedule contained in the current permit.
4. Alternative Analysis Evaluation: N/A
Spray Irrigation: CMUD has obtained authorization to recycle 3.0 MGD of effluent via
spray irrigation at a local golf course (outfall 002).
PART IV - EVALUATION AND RECOMMENDATIONS
CMU (Charlotte Mecklenburg Utilities) has requested that the subject permit be renewed.
At the presen time, CMU is in the process of increasing the permitted capacity of the Mallard Creek
WWTP fro MGD to 12.0 MGD b adding the various physical modifications and/or upgrades
i Y g P Y per'
identified in Part II (f) above. With the exception of the flows recorded during the first six (6)
months of this year (well above average rainfall was recorded), this facility is averaging 1- 2 MGD
less per month than the current 8.0 MGD capacity.
The e isting facilities (and those WWT facilities under construction) should be capable of
meeting the current permit limitations. However, if, at some point nutrient limitations are applied to
this facility, additional treatment may be necessary based on a review of effluent nutrient monitoring
tY Y �' g
data over the ,!past twelve (12) months.
be renewed
flows only,
permit.
ig a final review and approval by the NPDES Unit, it is recommended that the permit
3 requested. Upon renewal, the permit should reflect limits for 8.0 and 12.0 MGD
the facility has expanded above the 6.0 MGD capacity that was listed in the previous
Signature of Report reparer D e
o�
Water Quality Vegional Supervisor bate
Page 4

•
CHARLOTTE.,, ACV 7 L,,
_:....
Mrs. Valery Stephens
NC DENR / Water Quality / Point Source Branch —.--
1617 Mail Service Center -
Raleigh, NC 27699-1617
Re: Permit Renewal for Mallard Creek WRF, NPDES Permit # NCO030210
Dear Mrs. Stephens,
Enclosed please find the original and two copies of EPA Forms 1 and 2A completed for
the renewal of Mallard Creek WRF NPDES Permit, # NC0030210. Also included with
the application forms is a Sludge Management Plan for Mallard Creek WRF. These
documents are being sent to your attention to complete the requirements for a Permit
renewal at Mallard Creek WRF.
In reference to this facility, no changes have been made since the last permit application
was completed and submitted on 5/20/1997. The only process change, is that the
trickling filters that are in place have been taken out of operation and are not scheduled to
be placed back on-line. The upgrades that are mentioned in that cover letter with the
5/20/1997 application are still under construction and have not been determined to be
"substantially complete" by the Project Engineer. Further information about the project
is included with Form 2A.
If you have any questions or need further information, please contact me at (704) 357-
1344, Jerome Lucky, Mallard Creek WRF Operator in Responsible Charge, at (704) 547-
0680 or Dawn Padgett, Environmental Management Division at [phone]. Thank
you for your attention.
Sincerely,
��,�1i , A �,, ', C�
acqueline A. Jarrell, P.E.
Superintendent, Environmental Management Division
Charlotte Mecklenburg Utilities
Cc: files, JNL
CHARLOTTE-MECKLENBURG UTILITIES
Environmental Management Division 4000 Westmont Drive
Charlotte, NC 28217
PH: 704/357-1344

I
Mallard Creek WRF — NPDES # NCO030210
Sludge Management Plan
Solids are removed from the Primary Clarifiers continuously using five -diaphragm
pumps; one pump is dedicated to removing the scum from the primaries and then one
diaphragm pump for each of the Primary Clarifiers. Pumps are run continuously
pumping out of the bottom of the primary clarifiers to the anaerobic digesters. Waste
Activated Sludge is continuously pumped to thickening centrifuges, where it is thickened
to around 2 — 3% solids and pumped to the same anaerobic digesters. The solids are
maintained in the digesters until stabilized (a minimum of 38% volatile solids
destruction). After stabilization, solids are dewatered to approximately 18 to 22% solids,
using centrifuges, and then stored in the biosolids storage building.
Solids in the biosolids storage building are routinely sampled for fecal coliform to show
pathogen reduction, and then land applied. The solids that are land applied meet all
criteria and limits for Class B biosolids under the self -implementing provision of 40 CFR
Part 503 and meet all requirements and conditions of NC-DENR Permit No.
WQ0000057. When the biosolids do not meet the Class B requirements, for various
reasons, the residuals are disposed of at various landfills.
cqueline A. Jarrell, P.E.
Superintendent, Environmental Management Division
Charlotte -Mecklenburg Utilities

I. -
Mallard Creek WRF -- NPDES Permit #NC0030210
B.2.c. No wastewater is injected under gourd

L • -
Mallard Creek WRF — NPDES Permit #NC0030210
B.2.d. The attached map includes an outline of the treatment facility and the major sewer
trunk lines into the facility and the reclaimed water discharge line. Please note that there
are no known wells within 1/4 of this facility. All surface waters in the area are indicated
on this map.

Mallard Creek WWTP
b
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* e e906J0 720 >0p—s&avity Mains
c �9 °® __pp Face Mains
n9 0
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YZ y o ` >O� Q One Mi. Radius
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Mallard Creek WRF — NPDES Permit #NC0030210
B.3. Process Flow Diagram or Schematic
Attached is !a copy of a flow schematic for Mallard Creek WRF. Please note that the facilities that are
bolded are part of the current upgrade, the facilities indicated by the dashed line are proposed for possible
future construction.
Also included is a spreadsheet with a description of the facilities that are currently under construction.
Mallard Creek WRF, Expansion to 12 MGD, is at the top of the page. A separate spreadsheet headed,
Mallard Creek WRF Pre-existing Basin Capacities, includes the sizes of the existing facilities. The third
spreadsheet includes the approximate detention times through each of these facilities, when all of the
facilities are in use.
The location of the back up power source is included with the may for B.2.a., B.2.b., and B.2.e.
The schematic should be self explanatory, if there are any questions, please give this office a call or you
may call the Operator in Reportable Charge at the facility. These phone numbers are included with the
application! Please note that the Trickling Filters are not currently in operation. At this time, they are not
scheduled to be placed in operation.

Mallard Creek WRF - NPDES # NCO030210
Average Detention Times through core plant operations
Average Plant flow = 5.625 MGD
four primary clarifiers with a total capacity of 0.7422 MG
Aerobic Treatment - Train 1 capacity-1.569872 MGD
Aerobic Treatment - Train 2 capacity-1.816473 MGD
two final clarifiers with a total capacity of - 1.76154 MGD
Primary detention time
Activated Sludge detention time
0.1323 days
0.60202 days
3.17525 hours
14.4484 hours
Final Clarifiers detention time 0.31316 days 7.5159 hours
with all units on line

10/23/02
Mallard Creek WRF
Pre-existing Basin Capacities
Primary Treatment
-
--
Primary Clarifiers
--- -
#1
Basin Volumes (9a1.)
--
-- -
--------
133200
- --
-- -----
#2
--
_133200
253790
-
- -
-- --
- --
_ . — --
#4
Secondary Treatment
_ Train _
1
Basin Designation
Anoxic1.1
Aer. 1.1
Type
Anoxic
Rectangular Aeration
# of cells
4
2
-
Dimensions (ft.)
14 X 32
28 X 160
Side water Depth (ft.)
14
14
10.5
10.5
Volume (ft)
25090
125440
Volume al. _
187673.2
938291.2_
221964.04
221954.04
Aer. 1.2
Aer. 1.3
Circular Aeration
Circular Aeration
1
1
60 d.
60 d.
29673
29673_
_
_
Anoxic 2.1
Anoxic
4
14 X 32
_
14
25088
187658.24
2
___
Aer. 2.1 _
Aer. 2.2
Aer. 2.3
! F.C. 1
F.C. 2
Rectangular Aeration
Circular Aeration
Circular Aeration
Circular clarifier
Circular clarifier
_ 2
1
1
_ 1
1
28 X 160
70 d.
70 d.
_
_ 14
12
12
125440
46158
46158
117750
117750
938291.2 ,
345261.84
345261.84
880770
880770
Final Clarifier_ s
100 d.
100 d.
_ 15 _
15

Mallard Creek WRF
Expansion to 12 MGD
_
_ _
-
Process
No.
Dimensions
Vol/Basin (CF)
Vol/Basin (Gal)
Total Volume (Gal)
Influent Filter Screens
2
4 ft W
NA
NA
NA
Influent Pumping Station
5 Pumps
NA
IP-1
NA
NA
NA
IP-2
NA
NA
NA
NA
NA
NA
NA
IP-3
NA
NA
NA ---
NA
--
IP-4
NA _
NA -- . _
NA
I P-5
NA
Forced Vortex Grit Removal
2
18 ft Dia x 9.17 ft D
NA
NA
NA
Day Tank
2
90 ft L x 40 ft W x 20 ft D
72,000
538,632
1,077,264
Primary Clarifier
1
85 ft Dia x 15.5 ft D
75,320
563,469
563,469
Prim Sldg Pumps
3 Pumps
NA
NA
NA
NA
NA
NA
NA
NA
NA
PSP-6
PSP-7
NA
NA
PSP-8
NA
Aeration Basin
—
Anoxic Cells
2
54 ft L x 18 ft W x 14.5 ft D
14,094
105,437
_
210,874
Oxic Cells
2
147 ft L x 56 ft W x 13.8 ft D
113,602
— 849,854
1,699,707
Seconary Clarifier
1
100 ft Dia x 19 ft D
129,565
969,276
969,276
RAS Pumps
2 Pumps
_
RASP-4
NA
NA
NA
NA
_
RASP-5
_
NA
NA
NA
_
NA
WAS Pumps
2 Pumps
_ _
WASP-3
NA
NA - - ---
NA
NA
NA
NA ---- - -- -- - - -
-- —
WASP-4
NA
NA - -- ------
Effluent Filters
2
70 ft L x 16 ft W
1,120 SF/Filter
NA
2,240 SF Total
Equalization Basin
1
250 ft L x 280 ft W x 13 ft D
668,360
5,000,000
5,000,000
UV Disinfection Equipment
2 channels
depth = 58 inch min, 60 inch max
NA
NA
NA
6 modules/channel
_
NA
NA
NA
Lime Feed System
2 feeders
12 ft Dia, 34 ft H
3,450
NA
NA
Anaerobic Digester
1
85 ft Dia x 37 ft D
173,072
1,294,752
1,294,752
Thickening Centrifuge
1
NA
NA
NA
NA
Dewatering Centrifuge
1
NA
INA
INA
INA

Mallard Creek; WRF — NPDES Permit #NC0030210
B.2.a. Attached is a copy of the General Site Plan for Mallard Creek WRF. Please note
that the boldedi units are part of the current upgrade to this facility, and the dashed lines
are for projected expansions.
B.2.b Please note that the 42" sanitary sewer line into the plant and the 42" discharge
line to Mallard Creek. These lines are indicated on this map, and this should be used for
the requirement to show the major pipe through which wastewater enters the facility and
through treated wastewater is discharged into the creek. There are no bypass lines at the
facility.
B.2.e. Please rote the area the anaerobic digesters in the Northern corner of the plant, on
this map. This is where the solids are treated. Just south of the digesters is the Biosolids
Handling Building where the Waste Activated Sludge (WAS) is thickened, and the
digested sludge is dewatered. Slightly further south of the Biosolids Handling Building is
the Biosolids SI orage Building where the dewatered sludge is stored until they are land
applied.
13.3. The location of the back-up generators is included with this site plan. They are
located in the southwest area of the facility, next to the influent pumping station.

•. o
FACILITY NAME AND PERMIT NUMBER:
FormAppmved 1114199
OMB Number 2040-0086
Mallard Creek WRF, NC0030210
SUPPLEMENTAL APPLICATION INFORMATION
PART F. INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA, CERCLA, or other remedial wastes must
complete Part F.
GENERAL INFORMATION:
F.I. Pretreatment Program. Does the treatment works have, or is 8 subject to, an approved pretreatment program?
XX-Yes _No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. _ 0
b. Number of CIUs. 2
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: United Technologies Carrier
9701 Old Statesville Rd.
Mailing Address:
Charlotte, NC 28269
FA. Industrial Processes. Describe all of the industrial processes that affect or contribute to the SIU's discharge.
—psstC.ess_wasteswater is ¢enerated from hosphatin OReration, plasma are cutting
leak testing and final testing of heavy and light commercial chillers.
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): —Hpavy and light rommpreial rhillers
Rawmaterial(s): Steel, copper tubing, rubber gaskets, welding rods, welding flux,
steel sot, re r gerants, o s, pa nts, c eaners, nsulation (foci
F.6. Flow Rate. glue, welding gases, brazing gases, brazing wire, brazing flux,
gasket sealers, resins, electrical panels,wiring and helium.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharged into the collection system in gallons per day
(gpd) and whether the discharge is continuous or intermittent.
_9,Q12_ gpd ( XXcentinuous 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.
1 07_7_ gpd (_]continuous or _intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits XX Yes _No
b. Categorical pretreatment standards _XXYes _No
If subject to categorical pretreatment standards, which category and subcategory?
__4n CPR Pr�43i.17 Metal Finishing
),
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 18 of 21
Page 18 — A of 21

Significant Industrial User Information — supplement to Page 18 — A of 21
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging
to the treatml nt works. Submit additional pages as necessary.
Name: i Mallard Creek Polvmers. Inc.
Mailing Address: 14700 Mallard Creek Road
Charlotte, NC 28262
FA Indsrstrial Processes. Describe all of the industrial processes that affect or contribute to the SIU's
discharge.
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): SBR Polymer Latex
Raw Material(s): Styrene. Butadiene, surfactant and water
FA Flow Rate:
a. Process wastewater flow rate, indicate the average daily volume or process wastewater
discharged into the collection system in gallons per dya (gpd) and whether the discharge
is continuous or intermittent..
69,700 gpd ( XX continuous)
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.
6,100 gpd ( XX continuous)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits XX Yes
b. ! Categorical Pretreatment Standards XX Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the treatment works attributed to waste discharged 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?
XX No.
Page 18 — B of 21