NC0024970_Permit Issuance_20010130

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0024970
McAlpine Creek WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 30, 2001
This document is printed on reuse paper - iapiore any
conterit an the reYerse side

AI LC
NCDENR
Mr. Barry M. Gullet
CMUD Administrative Division
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
Dear Mr. Gullet:
Michael F. Easley
Govemor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Kerr T. Stevens, Director
Division of Water Quality
January 30, 2001
Subject: Issuance of NPDES Permit NC0024970
CMUD McAlpine Creek WWTP
Mecklenburg County
Division of Water Quality (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).
The following changes have been made to your permit:
• The selenium limit has been removed from the effluent limits page of the permit. A new reasonable
potential analysis was performed using data from 1999-2000. The results of this analysis predicted a
maximum potential selenium concentration that is below the allowable instream concentration. Your
facility will receive no limit, but you will still be required to monitor selenium monthly under the Pretreatment
Long Term Monitoring Plan.
• The cover letter to your facility's draft permit erroneously stated that the new effluent mercury limit
would be 0.12 µg/L. The effluent limit is, as listed in the effluent limits page of the draft, 0.012 µg/L.
• The last line to the cyanide footnote in the effluent limits page has been deleted You are no longer
required to report values of cyanide measured below the specified quantitation level. A value of less than
10 µg/L will be considered zero for compliance purposes. Additionally, you should consider adherence
to the quantitation level of 10 µg/L for cyanide and 0.2 µg/L for mercury as fulfilling the intent of Part
II Section D. (4) of the NPDES permit for utilization of the most sensitive laboratory methods possible.
By transmittal of this letter, these quantitation limits apply to all NPDES permits for the CMUD
wastewater treatment plants.
• The supplement to the permit cover sheet has been changed as per your correspondence of December
11, 2000 to accurately reflect your facility's current process train.
• Your facility has been assigned a daily average limit for Total Residual Chlorine (TRC) of 28 µg/L and a
weekly average TRC limit of 17 pg/L.
• The sampling locations and instream monitoring requirements have been corrected. The monitoring
requirement for dissolved oxygen now reads, "IC1, SC2, SC3, SC4, SC5, LSC1, MC1, MC2." After
reassessing instream data for sample locations LSC2 and LSC3, LSC3 was eliminated as a sampling point
as per your request. The data from LSC3 did not offer any supplemental information to that provided
by LSC2.
• The June -September frequency for instream dissolved oxygen, temperature, conductivity and pH
monitoring has been changed to once per week as per your request.
N. C. Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
Internet: h2o.enr.state.nc.us
Phone: [phone]
fax: [phone]
DENR Customer Service Center: 1 800 623-7748

• Special Condition A. (4.) has been refined to provide you with more specific requirements for the
requested nutrient study.
• At the request of Mike Parker of the Mooresville Regional Office, reasonable potential analysis was re-
run for lindane using a standard of 0.01 µg/L as per the North Carolina Administrative Code Section:
15A NCAC 2B.0211 Part 3 Section 1(xii.). Using this limit, it was found that the effluent concentrations
of lindane from your facility have the potential to cause an exceedence of the stream standard. A daily
maximum limit for lindane of 0.01 µg/L has been added to your permit accordingly.
• As per a conference call made on December 21, 2000 between members of the NPDES Unit and your
staff, the reasonable potential analysis for nickel was re -run using data from June 1999 onward. The
results of this analysis indicate that there is no need for a nickel limit. As with selenium, you will still be
required to monitor nickel through the Pretreatment Long Term Monitoring Plan.
The expiration date of the permit will stand at June 30, 2005, as per the draft permit. This is in accordance
with the Division's Basinwide permitting schedule. This system of issuing permits by subbasin allows the Division to
spread out the permits in basins containing many permittees, of which the Catawba is one. In doing so, the NPDES
unit may maintain a balanced workload, regardless of the river basin.
In response to your query about measurement frequency, "daily" does indeed mean five days per week
excluding weekends and/or holidays. The Division is currently working on documentation to clarify this for all
NPDES permit holders. As regards your chronic toxicity -testing schedule, you are bound to a quarterly compliance
schedule as per correspondence from Matt Matthews of the Aquatic Toxicology Unit (August 26, 1999). The
quarters begin in March, June, September and December.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain
other permits which may be required by the Division of Water Quality or permits required by the Division of Land
Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that may be
required.
If you have any questions concerning this permit, please contact Natalie Sierra at telephone number (919)
733-5083, extension 551.
Sincerely,
Kerr T. Stevens
cc: Central Files
Mooresville Regional Office/Water Quality Section
NPDES Unit
Point Source Compliance Enforcement Unit
Aquatic Toxicology Unit
Mr. Roosevelt Childress, EPA
Technical Assistance and Certification Unit

Permit NC0024970
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,
Charlotte -Mecklenburg Utility Department
is hereby authorized to discharge wastewater from a facility located at the
McAlpine Creek Wastewater Treatment Plant
On US Highway 521
South of Charlotte
Mecklenburg County
to receiving waters designated as McAlpine 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 March 1, 2001.
This permit and authorization to discharge shall expire at midnight on June 30, 2005.
Signed this day January 30, 2001.
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0024970
SUPPLEMENT TO PERMIT COVER SHEET
Charlotte -Mecklenburg Utility Department is hereby authorized to:
1. Continue to operate the existing 64.0 MGD wastewater treatment facility
consisting of:
• flow equalization
• screening
• grit removal
• primary clarifiers
• aeration basins
• secondary clarifiers
• chlorination
• dechlorination
• anaerobic sludge digestion
• centrifuges and gravity sludge thickeners
• rapid sand filter
located at McAlpine Creek Wastewater Treatment Plant, on US Highway 521,
south of Charlotte in Mecklenburg County
2. Discharge from said treatment works at the location specified on the attached
map into McAlpine Creek, which is classified C waters in the Catawba River
Basin.

Discharge Point
NC00024790 - CMUD McAlpine Creek
Latitude:
Longitude:
uad #:
Stream Class:
Receiving Stream:
Permitted Flow:
35°35'70" Sub -Basin: 03-08-34
80°52'21"
G I5SE/Weddington
C
McAlpine Creek
64.0 MGD
Facility
Fac:
Loca
tion Location
North
Charlotte Mecklenburg Utilities Department (CMUD)
NC0024790
CMUD - McAlpine Creek WWTP

Permit NC0024970
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
r; i era
- F _ /1J NT€, -
H•.°�'�,�/�.►�.(-- - �-�
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:., i-., e.'., _ r
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, { Weekl �-
oriel' fity�,-.Y.
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Averagek
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,•-r.r_.'^a,,..
'Measure en
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equefcy�
..-€-'�:;�"3a- w:r�
,Sam.. I T.' per,
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,�`r , -=rE
Flow
64.0 MGD
Continuous
Recording
I or E
CBOD, 5-day (20°C)2
April 1- October 31
4.0 mg/L
6.0 mg/L
Daily
Composite
E, I
CBOD, 5-day (20°C)2
November 1- March 31
8.0 mg/L
12.0 mg/L
Daily
Composite
E,
'
Total Suspended Residue2
15.0 mg/L
22.5 mg/L
Daily
Composite
E,
NH3 as N (April 1- October 31)
1.0 mg/L
Daily
Composite
E
NH3 as N (November 1-March 31)
1.9 mg/L
Daily
Composite
E
Dissolved Oxygen3
Daily
Grab
E, U, D
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
Daily
Grab
E
Total Residual Chlorine4
17 µg/L
Daily
Grab
E
Temperature (°C)
Daily
Grab
E, U, D
Total Nitrogen (NO2 + NO3 + TKN)
Monthly
Composite
E
Total Phosphorus5
Monthly
Composite
E
Chronic Toxicity6
Quarterly
Composite
E
Conductivity
Daily
Grab
E, U, D
Chromium
51 µg/L
204 µg&L
Weekly
Composite
E
Lindane
0.01 µg/L
Weekly
Grab
E
Copper
2/Month
Composite
E, U, D
Cyanide?
5 µg1L
15 µg/L
Weekly
Grab
E
Lead
26 µg/L
34 µg&L
Weekly
Composite
E
Silver
2/Month
Composite
E
Zinc
2/Month
Composite
E, U, D
Mercury8
0.012 µg/L
Weekly
Composite
E
Molybdenum
2/Month
Composite
E
Footnotes:
i Sample Locations: E - Effluent, I - Influent, U - Upstream, D- Downstream. For instream
monitoring requirements, see Part .A.(2.).
2 The monthly average effluent CBOD5 and total suspended residue concentrations shall not exceed
15% of the respective influent value.
3 The daily average dissolved oxygen effluent concentrations shall not be less than 6.0 mg/L.
4 The daily average limit for total residual chlorine shall be 28 µg/ L.
5 See Part A.(4.). for additional nutrient monitoring information.
6 Whole effluent toxicity shall be measured by Chronic Toxicity (Ceriodaphnia) P/F at 90 %. Samples
shall be taken quarterly during the months of March, June, September and December. See Part
A.(3.).
7 The Division of Water Quality shall consider all cyanide concentrations reported below 10 ug/ L to
be "zero" for permit -compliance purposes only.
8 The quantitation limit for mercury shall be 0.2 ug/1 (0.2 ppb). Levels reported at less than 0.2 ug/1
shall be considered zero for compliance purposes.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0024970
A. (2.) INSTREAM MONITORING REQUIREMENTS
PARAMETERS TO BE SAMPLED
Parameter
Dissolved Oxygen
Temperature
Frequency Type
Location
1 /wk (June - September), 1/mo. Grab IC, SC2, SC3, SC4,
(October - May) SC5, LSC1, MC1, MC2
1 /wk (June - September), 1/mo. Grab IC1, SC1, SC2, SC3,
(October - May) SC4, SC5, LSC1, MCi,
MC2
Conductivity
i/wk (June - September), 1/mo. Grab IC1, SC1, SC2, SC3,
(October - May) SC4, SC5, LSC1, MC1,
MC2
pH i/wk (June - September), 1/mo. Grab
(October - May)
Ammonia (NH3)
Weekly (January - December) Grab
Nitrate/Nitrite (NOX) Weekly (January - December) Grab
Total Kjeldahl Nitrogen Weekly (January - December) Grab
(TKN)
Total Phosphorus (TP) Weekly (January - December) Grab
Orthophosphate (PO4) Weekly (January - December) Grab
Copper 1/mo. (January - December)
SC5
SC5
SC5
SC5
SC5
SC5
Grab IC1, SC1, LSC1, LSC2,
MC1, MC2
Cadmium 1/mo. (January - December)
Zinc 1/mo. (January - December)
Grab MC1, MC2
Grab IC1, SC1, LSC1, LSC2,
MC1, MC2
SAMPLE LOCATIONS:
Irwin Creek
1. Upstream of Irwin Creek WWTP (IC1)
Sugar Creek
1. Downstream of the confluence of Irwin and Sugar Creeks at Yorkmont Road (SC1)
2. Downstream of the confluence of Irwin and Sugar Creeks at Arrowwood Road (SC2)
3. Downstream of the confluence of Irwin and Sugar Creeks at Nations Ford Road (SC3)
4. Downstream of the confluence of Irwin and Sugar Creeks at Route 51 (SC4)
5. Downstream of McAlpine and Sugar Creeks confluence at Route 160 (SC5)
Little Sugar Creek
1. Upstream of Sugar Creek WWTP (LSC1)
2. Downstream of Sugar Creek WWTP at Archdale Road (LSC2)
McAlpine Creek
1. Upstream of Discharge (MC1)
2. Downstream of the confluence of McMullen and McAlpine Creeks at SC 2964 (MC2)
Upstream and downstream samples shall be grab samples. Instream sampling should continue to be
coordinated to reduce redundant sampling for the CMUD-McAlpine Creek, Sugar Creek, and Irwin
Creek wastewater treatment facilities. It is recommended that monitoring be conducted during the
same day or on consecutive days.
Instream monitoring requirements for Irwin Creek, Sugar Creek and McAlpine Creek WWTPs are
identical. All instream monitoring data will be submitted with the Discharge Monitoring Report
(DMR) data for McAlpine creek WWTP. Please refer to McAlpine Creek WWTP DMR data for any
instream monitoring data pertaining to Irwin Creek, Sugar Creek and/or McAlpine Creek WWTPs.

Permit NC0024970
A. (3.) CHRONIC TOXICITY PASS/ FAIL PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures
outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised
February 1998, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be
performed during the months of March, June, September, and December. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent 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 Branch
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 NC0024970
A.(4.) NUTRIENT STUDY
The South Carolina Department of Health and Environmental Control (SC DHEC) has
determined that Fishing Creek Reservoir, Cedar Creek Reservoir and Lake Wateree are impaired due
to excessive nutrient loads and algal response to discharges upstream of these lakes. The Catawba
River Basinwide Water Quality Plan (December 1999) states that a TMDL will be developed to address
the causes and sources of impairment in these South Carolina lakes. SC DHEC has proposed the
development of a phosphorus TMDL and is planning to limit phosphorus for all South Carolina
NPDES dischargers with flows greater than 50,000 gallons per day. Significant discharges of
phosphorus have also been linked to the North Carolina portion of the Fishing Creek Reservoir
watershed. Estimates indicate that a significant portion of the total phosphorus load comes from the
Sugar Creek Subbasin. To work towards reduction of this load, CMUD shall provide the Division
with a study that fully investigates the feasibility of reducing total phosphorus (TP) load at this
WWTP. The target TP load should be equivalent to a TP concentration of 1 mg/L at the effluent. This
condition should not be construed as a permit limit. However, a limit may be unposed once the TMDL
has been completed and an implementation plan is developed.
The optimization study should include the following:
• An identification of significant sources of pollution in the system.
• An evaluation of ways in which these sources can be reduced or eliminated.
• The possibility of reducing influent flows to the WWTP to control mass loading to the
stream.
• An assessment of the current treatment processes and ways in which this may be
optimized to achieve a higher level of treatment.
• A plan to optimize the current treatment system and, if necessary, add treatment units,
to achieve a higher level of nutrient removal.
The optimization study should be completed by February 1, 2002, and submitted to the following
address:
North Carolina Division of Water Quality
Water Quality Section/NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617

North Carolina } ss
Mecklenburg County}
001 o,w4 info
The Knight Publishing Co., Inc.
Charlotte, NC
Affidavit of Publication
THE CHARLOTTE OBSERVER
NCDENR/DWQ/BUDGET OFFICE
ACCOUNTS PAYABLE
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
REFERENCE: 30019881
3917854 NPDES WASTEWARTER PE
Before the undersigned, a Notary Public of said
County and State, duly authorized to administer
oaths affirmations, etc., personally appeared,
being duly sworn or affirmed according to law,
doth depose and say that he/she is a
representative of the Knight Publishing Company a
corporation organized and doing business under the
laws of the State of Delaware, and publishing a
newspaper known as The Charlotte Observer in the
city of Charlotte, County of Mecklenburg and State
of North Carolina and that as such he/she is
familiar with the books, records, files and
business of said Corporation and by reference to
the files of said publication
the attached advertisement was inserted. The
following is correctly copied from the books and
files of the aforesaid Corporation and
Publication.
PUBLISHED ON: 11/14
AD SPACE:
FILED ON: �1
NAME: V--._..._,/,c, l •-
100 LINE
11/15/00
PUBLIC NOTICE
STATE OF NORTH CAROLINA '
ENVIRONMENT ALMA
MAILNAGEMENT SERVICE CENTER MIISSI NINPDES UNIT
RALEIGH, NC 27699.1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT
On the basis of thorough slat! review and application of NC General Statute
14321. Public law 92.500 and other lawful standards and regulations, the -
North Carolina Environmental
Management
Commission proposes
poses to issue
a
charge
00l1Pollutant e Discharge effective 45 days
charge pefmit to the person(s) listed on the attached pages
from the publish date of this notice. rmif will be accepted until 30
Written comments regarding the proposed psi
days atter publish date of this nonce. All comments received pridr to that
date -
are.
considered in the final determinations.regard tlthe Pr posed perm .
The Director of the NC Division f W��MQuh Quality
May
sydn decide
receiveta• significantpublic-,
meeting for the proposed :
degree of pudic interest. -
Copres of the draft permit and other support information on file used to deter-
mine conditions present in the draft permit are available upon request and
payment Of the costs of reproduction. Mail comments and/or requests for
information to the NC Division of Waler.0uality at the above address or call
Ms. Christie Jackson at [phone]. extension 538. Please include the
NPDES permit number (attached) in any cornmurnration. Interested persons
may also visit the Division of Water Quality a1 512 N. Salisbury Street, Raleigh,
NC 27604-1148 between the hours of 800 a.m. and 5:00 p.m. to review infon
matron on file.
Brookshirearmit BNM.. Charlotte. NC 28202 has applied for aD.Mcpine permit renewal for a
tacitly located in Mecklenburg County discharging treated wastewater into
McAlpine Creek in the Catawba River Basin. Currently CBOD, ammonia, fecal
ry
andoselenium are water duality liresidual chlorinemed. Th s discharge may affect romium. nickel. cyanide, lead, future allo
cations in this portion of the receiving stream.
NPDES Permit Number NC0073539, RaycO Utilities. Willowbrook
broa , 107
Commercial Park Drive, SW. concord. NC 28027 has applied7
renewal lot a facility located in Mecklenburg County dischargtn treated
wastewater into Ramah Creek in the yadkin•Pee Dee River Basin. Currently
BOD, Ammonia & Fecal Colitorm are water quality Iiiniled. This discharge
May affect Mute allocations in this portion Of the receiving stream.
NPDES Permit Number NC0036277, CMUD•Mc00well Creek WWTP, 5100
Brookshire Boulevard, charlotte. NC 28216 huts applied for a permit renewal
for a facility located In Mecklenburg County diScharguig treated wastAmmonia,
into McDowell Creek in the Catawba River Basin. Currently 0005,
total residual chlorine, total nitrogen, total phosphorus,. nickel & mercury are
water quality limited. This discharge may affect future allocations in this por-
tion of the receiving stream.
LP3917854
TITLE:
DATE:
/ t
In Testimony Whereof I have hereunto set my hand
day and y-ate aforesaid.
Notary:
and affixed my seal, the
Commission Expires: t./�(403

emxcs--
"FiW
0
REASONABLE POTENTIAL ANALYSIS
Prepared by: Natalie Sierra, 10/13/00
Facility Name =
NPDES # =
Qw (MGD)
Qw (cfs) =
7Q10s (cfs)=
IWC (%) =
CMUD-McAlpine Creek
NC0024970
64
99.0208
2
98.02
Parameter
Chronic CCC w/s7Q10 dil. Acute CMC w/no dil.
FINAL RESULTS, ug/I FINAL RESULTS, ug/I
Frequency of Detection
#Samples # Detects
Arsenic
Max. Pred Cw
Allowable Cw
Cadmium
Max. Pred Cw
Allowable Cw
Chromium
Max. Pred Cw
Allowable Cw
Lead
Max. Pred Cw
Allowable Cw
Copper (A.L.)
Max. Pred Cw
Allowable Cw
Nickel -
Max. Pred Cw
_�__Allouvable Cw
Silver (A.L.)
Max. Pred Cw
Allowable Cw
Zinc (A.L.)
Max. Pred Cw
Allowable Cw
Cyanide
Max. Pred Cw
Allowable Cw
Mercury
Max. Pred Cw
Allowable Cw
Molybdenum
Max. Pred Cw
Allowable Cw
Selenium
Max. Pred Cw
Allowable Cw
Lindane
Max. Pred Cw
Allowable Cw
3.4
51.0
1.5
2.0
68.0
51.0
37.8
25.5
520.0
7.1
36.3 i
89.8
25.4
0.1
900.7
51.0
19.7
5.1
1.0
0.012
41.3
NA
4.7
5.1
0.128
0.010
360
15
1022
34
7.3
261
1.2
67
22
NA
NA
20
NA
48 0
139 11
139 13
140 16
134 70
62 37
139 8
136 128
142 60
44 1
48 34
39 2
62 2
Modified Data: Use 0.5 Detection Limit for non -detects

REASONABLE POTENTIAL ANALYSIS
Prepared by: Natalie Sierra, 10/13/00
Facility Name =
NPDES # =
Qw (MGD) =
Qw (cfs) =
7Q 10s (cfs)_
1WC (%) =
CMUD-McAlpine Creek
NC0024970
64
99.0208
2
98.02
Parameter
Chronic CCC w/s7Q10 dil. Acute CMC w/no dil.
FINAL RESULTS, ug/I FINAL RESULTS, ug/I
Frequency of Detection
#Samples # Detects
Arsenic
Max. Pred Cw
Allowable Cw
Cadmium
Max. Pred Cw
Allowable Cw
Chromium
Max. Pred Cw
Allowable Cw
Lead
Max. Pred Cw
Allowable Cw
Copper (A.L.)
Max. Pred Cw
Allowable Cw
Nickel
Max. Pred Cw
Allowable Cw
Silver (A.L.)
Max. Pred Cw
Allowable Cw
Zinc (A.L.)
Max. Pred Cw
Allowable Cw
Cyanide
Max. Pred Cw
Allowable Cw
Mercury
Max. Pred Cw
Allowable Cw
Molybdenum
Max. Pred Cw
Allowable Cw
Selenium
Max. Pred Cw
Allowable Cw
Lindane
Max. Pred Cw
Allowable Cw
3.4
51.0
360
1.5
2.0 15
68.0
51.0 1022
37.8
25.5 34
520.0
7.1 7.3
164.3
89.8 261
25.4
0.1 1.2
900.7
51.0 67
19.7
5.1 22
1.0
0.012 NA
41.3
NA NA
4.7
5.1 20
0.128
0.010 NA
48 0
139 11
139 13
140 16
134 70
140 77
139 8
136 128
142 60
44 1
48 34
39 2
62 2
Modified Data: Use 0.5 Detection Limit for non -detects

REASONABLE POTENTIAL ANALYSIS
Prepared by: Natalie Sierra, 10/13/00
Facility Name =
NPDES # _
Qw (MGD) =
Qw (cfs) =
7Q10s (cfs)=
IWC (%) =
CMUD-McAlpine Creek
NC0024970
64
99.0208
2
98.02
Parameter
Chronic CCC w/s7Q10 dil. Acute CMC w/no dil.
FINAL RESULTS, ug/I FINAL RESULTS, ug/I
Frequency of Detection
#Samples # Detects
Arsenic
Max. Pred Cw
Allowable Cw
Cadmium
Max. Pred Cw
Allowable Cw
Chromium
Max. Pred Cw
Allowable Cw
Lead
Max. Pred Cw
Allowable Cw
Copper (A.L.)
Max. Pred Cw
Allowable Cw
Nickel
Max. Pred Cw
Allowable Cw
Silver (A.L.)
Max. Pred Cw
Allowable Cw
Zinc (A.L.)
Max. Pred Cw
Allowable Cw
Cyanide
Max. Pred Cw
Allowable Cw
Mercury
Max. Pred Cw
Allowable Cw
Molybdenum
Max. Pred Cw
Allowable Cw
Selenium
Max. Pred Cw
Allowable Cw
Lindane
Max. Pred Cw
Allowable Cw
3.4
51.0
1.5
2.0
68.0
51.0
37.8
25.5
520.0
7.1
164.3
89.8
25.4
0.1
900.7
51.0
19.7
5.1
1.0
0.012
41.3
NA
4.7
5.1
0.1
NA
360
15
1022
34
7.3
261
1.2
67
22
NA
NA
20
NA
48
139
139
140
134
140
139
136
142
44
48
39
62
0
11
13
13
70
77
8
128
60
1
34
2
2
Modified Data: Use 0.5 Detection Limit for non -detects

1 .
DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0024970
Facility Information
Applicant/Facility Name:
Charlotte -Mecklenburg Utilities Department (CMUD) — McAlpine
Creek WWTP
Applicant Address:
5100 Brookshire Blvd.; Charlotte, NC 28216
Facility Address:
US Highway 521, south of Charlotte
Permitted Flow
64 MGD
Type of Waste:
91.8% Domestic
8.2% Industrial
Facility/Permit Status:
Class IV/Active; Renewal
County:
Mecklenburg County
Miscellaneous
Receiving Stream:
McAlpine Creek
Regional Office:
Mooresville
Stream Classification:
C
State Grid / USGS Quad:
GI5SE
303(d) Listed?
Yes
Permit Writer:
Natalie Sierra
1 80ctober00 .
Subbasin:
03-08-34
Date:
Drainage Area (mi2):
92.4
'� F � { �
� �Sr r
s • t
`°
Lat. 35° 35 70" N Long.
r
'y� t
�
fi
g,,"
Summer 7Q10 (cfs)
2
Winter 7Q10 (cfs):
10
30Q2 (cfs)
13.5
80° 52' 21" W
) (cfs Flow Average :
62.4
IWC (%):
98.02
BACKGROUND
McAlpine Creek WWTP is the largest of the five Charlotte -Mecklenburg Utilities
Department (CMUD) plants, now at a total design flow of 64 MGD. The facility serves the City
of Charlotte, Town of Mint Hill, Town of Matthews, Town of Pineville, unincorporated areas of
Mecklenburg county, the Six -Mile Creek area of Union County, and overflow from the CMUD
Irwin Creek WWTP . In addition, the plant also accepts wastewater from 38 significant
industrial users (SIUs) and as such, has a full Long Term Monitoring Program (LTMP) with the
Pretreatment program.
At the time of the last permit renewal, the facility had applied for an Authorization to
Construct (ATC) that would allow for a plant expansion to 64 MGD. The 1996 permit was
therefore a phased permit, setting limits for both the 48 MGD and the 64 MGD flows.
Construction on the plant expansion was completed in August 2000 and includes the construction
of three additional aeration basins, new screening and degritting facilities and modifications to
the anaerobic digesters. CMUD also has ATCs to improve process units that have been
identified as odor sources and construct a new chlorine contact basin. In July 1999, CMUD
signed into contract a residuals management plan that provides for guaranteed beneficial re-
use/disposal of plant residuals (including land application and lime stabilization).
Instream Monitoring and Verification of Existing Conditions and DMR Data Review.
DMRs were reviewed beginning in February 1998 through August 2000. Average flow
during this time was 40.3 MGD. Total residual chlorine values during this time were frequently
below detection level (<5ug/L), indicating adequate dechlorination.
All the CMUD plants are required to perform extensive instream monitoring. For this
permit renewal, only the sampling points upstream and downstream of McAlpine creek were
analyzed. Between Jan 1999 and August 2000, the dissolved oxygen (DO) values instream were
always above 5 mg/L and frequently above 6 mg/L both upstream and downstream of the
discharge. The downstream DO values were always below the saturation DO concentration,
usually between 6 and 10 mg/L.
Instream nutrient data were also analyzed. For nitrate/nitrite, total kjeldahl nitrogen
(TKN) and total phosphorus, it is clear (see attached graphs) that some nutrient loading is
Fact Sheet
NPDES NC0024970 Renewal
Page 1

occurring at the outfall. Ambient data for the three nutrient parameters showed concentrations of
less that 0.5 mg/L, yet downstream nutrient concertinos were above 1.5 mg/L for total
phosphorus, above 4 mg/L for total nitrogen and above 1 mg/L for TKN. The impact that such
loads would have is unclear.
CMUD-McAlpine Creek monitors for a broad range of metals due to the large industrial
contribution to its wastestream. Data from both the Pretreatment LTMP and the DMRs was used
to assess reasonable potential for arsenic, cadmium, chromium, lead, copper, nickel, silver, zinc,
cyanide, mercury, molybdenum, selenium, and lindane.
Fact Sheet
NPDES NC0024970 Renewal
Page 2

Results of Reasonable Potential Analysis (RPA):
A reasonable potential analysis (RPA) was performed for all monitored parameters. It
was determined that there is reasonable potential for pollution from the following:
• Chromium
• Lead
• Copper
• Nickel
• Silver
• Zinc
• Cyanide
• Mercury
• Selenium
• Molybdenum
• Lindane
No reasonable potential exists for the following:
• Arsenic
• Cadmium
Copper, Silver, and zinc are all action level pollutants. Since CMUD —McAlpine does
not currently have toxicity problems, these compounds will be monitored only, not
limited. The same applies to molybdenum and lindane, for which no state or federal
standard exists. There have been so few detects for cadmium that it is debatable whether
this should be monitored through the NPDES permit or the LTMP.
Correspondence: The inspection reports reveal a well -run facility with few problems. There
have been, however, several NOVs issued per year. The bulk of these have been for bypass
violations relating to sanitary sewer overflow. CMUD-McAlpine Creek WWTP was assessed
for these bypass problems in December 1999. There have also been several violations of the
total residual chlorine limit, but the facility has been in compliance with this limit in the past
year.
PERMITTING STRATEGY AND SUMMARY OF PROPOSED CHANGES
The most recent basin plan for the Catawba River (December 1999) discusses a
management strategy for the Fishing Creek watershed, of which McAlpine Creek forms a part.
The principle issue in this management strategy is the nutrient loading in the watershed, which
contributes approximately 40 percent of the phosphorus load to the Sugar Creek watershed in
South Carolina. The Sugar Creek watershed has streams and lakes that are 303(d) listed because
of nutrient loading. The CMUD plants are considered the most significant dischargers in the
Fishing Creek watershed with respect to phosphorus and thus require plant optimization to
reduce these loadings. Accordingly, a nutrient study special condition has been added to the
permit. All other changes are a result of the RPA that was performed.
Due to finding of reasonable potential, mercury and selenium will be limited in the
NPDES permit. Molybdenum, which, like mercury and selenium, was only in the LTMP, will
now be monitored twice monthly under the NPDES permit due to finding of reasonable potential.
Cadmium, on the other hand, will go from being a limited parameter to a monitored parameter
based on a finding of no reasonable potential.
All the other parameters will remain the same in accordance with the previous permit and
1995 WLA. In that (as well as the current) permit, CBOD, Total Suspended Residue, NH3-N,
fecal coliform, cyanide, lead, chromium and nickel were all water quality limited parameters.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: October 25, 2000
Fact Sheet
NPDES NC0024970 Renewal
Page 3

4.5
3.5
2.5
z
1.5
0.5
Upstream/Downstream Total Kjeldahl Nitrogen Data for McAlpine Creek
f
Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug-
99 99 99 99 99 99 99 99 99 99 99 00 00 00 00 00 00 00 00
Date
DMC1
El MC2

16
14
12
10
E
z
z 6
Upstream/Downstream Nitrate/Nitrite Data for McAlpine Creek
r
Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug-
99 99 99 99 99 99 99 99 99 99 99 00 00 00 00 00 00 00 00
Date
❑MC1
Ell MC2

4.5
3.5
1.5
0.5
Upstream/Downstream Total Phosphorus Data for McAlpine Creek
l r
Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun-
99 99 99 99 99 99 99 99 99 99 99 00 00 00 00 00 00
Date
t— r�
Jul- Aug-
00 00
❑Total P (MC1)
❑ Total P (MC2)

Instream DO for McAlpine Creek
Saturation DO
-®-DO(MC1)
--A-DO (MC2)
Nov-98 Feb-99 May-99 Aug-99 Dec-99 Mar-00 Jun-00 Oct-00
Dissolved Oxygen (mg/L)

• •
f
•

1 •
REASONABLE POTENTIAL ANALYSIS
Prepared by: Natalie Sierra, 10/13/00
Facility Name =
NPDES # =
Qw (MGD) =
Qw (cfs) =
7Q 10s (cfs)=
IWC (%) =
CMUD-McAlpine Creek
NC0024970
64
99.0208
2
98.02
Parameter
Chronic CCC w/s7Q10 dil. Acute CMC w/no dil.
FINAL RESULTS, ug/I FINAL RESULTS, ugll
Frequency of Detection
#Samples # Detects
Arsenic
Max. Pred Cw
Allowable Cw
Cadmium
Max. Pred Cw
Allowable Cw
Chromium
Max. Pred Cw
Allowable Cw
Lead
Max. Pred Cw
Allowable Cw
Copper (A.L.)
Max. Pred Cw
Allowable Cw
Nickel
Max. Pred Cw
Allowable Cw
Silver (A.L.)
Max. Pred Cw
Allowable Cw
Zinc (A.L.)
Max. Pred Cw
Allowable Cw
Cyanide
Max. Pred Cw
Allowable Cw
Mercury
Max. Pred Cw
Allowable Cw
Molybdenum
Max. Pred Cw
Allowable Cw
Selenium
Max. Pred Cw
Allowable Cw
Lindane
Max. Pred Cw
Allowable Cw
3.4
51.0 360
1.5
2.0 15
68.0
51.0 1022
37.8
25.5 34
520.0
7.1 7.3
164.3
89.8 261
25.4
0.1 1.2
900.7
51.0 67
19.7
5.1 22
1.0
0.012 NA
41.3
NA NA
101.6
5.1 20
0.1
NA NA
48 0
139 11
139 13
140 16
134 70
140 77
139 8
136 128
142 60
44 1
48 34
48 6
62 2
Modified Data: Use 0.5 Detection Limit for non -detects

•
TO)
4111111
CHARLOTTE
December 11, 2000
Ms.Natalie Sierra
NCDENR - DWQ - NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Permit No. NC0024970
McAlpine Creek WWTP, Mecklenburg County
Comments on Draft NPDES Permit
Dear Ms. Sierra:
On November 17, 2000, we received an unsigned letter from you dated October 25, 2000, transmitting
the subject draft permit for our review. I subsequently phoned you and we agreed that our review
comments, questions, and suggestions would be due to you by December 14, 2000. The purpose of
this letter is to present the results of our review.
1. The cover letter states that the permit limit for mercury will be a weekly average of 0.12 pgll.
The table in Section A.(1.) of the permit lists the limit as 0.012 pgll. Please clarify which is
correct.
\ \e �2. The cover letter states that a new limit is proposed for selenium based on a finding of
DJ - reasonable potential in the RPA. Our records show that selenium was last detected at the
WWTP in December 1998, and that laboratory problems were suspected to have been a factor
o\\ at that time. No industries have been identified in the basin that discharge significant amounts
of selenium. We request that you review the RPA and remove the selenium limits. If your
review does not support this, we request a copy of the RPA for our review and additional time
for possible further requests that this limit be removed. •
3. We appreciate DWQ's recognition of the difficulties encountered in measuring cyanide and
mercury at very low levels and agree that 10 pg/I and 0.2 pgll are appropriate reporting levels
respectively. We are concerned, however, about your proposed requirement that we report
values measured below those levels. Our concern is that reporting these values could give the
appearance that they are in fact accurate and useful measurements. This incorrect conclusion
could lead to disputes with your agency and/or other parties over the life of the permit. We
request that any value measured below 10 pg/I for cyanide or 0.2 pg/I for mercury should be
reported as less than these values and assumed to be zero for calculation purposes.
4. It appears that the draft permit we received may be incomplete. We are accustomed to seeing
a section of the permit addressing industrial pretreatment requirements. The draft permit that
tiewe received does not contain those provisions. Please confirm that your transmittal is the
S complete permit, or send us a complete draft p rnit°a d allow us reasonable additional time for
Lv (V 5 review of the complete document. (,-J I 1-' 1._-�,. NO ( I ctw0`
5. The draft permit shows an expiration date of June 30, 2005. The current permit expires on ic)('rc.E"i �p
November 30, 2000. If the expiration date shown on the draft permit is used, the permit will not
be in effect for a full five-year period. We request that the new expiration date should be the
S`�y1c ,'� 1 �'r
k� e--vt "Cir t 004(6 (o
/1
Administration Division 5100 Brookshire Blvd. Charlotte, NC 28216 Phone: [phone] Fax: [phone]
Charlotte -Mecklenburg Utilities

latter of either November 30, 2005, or five years after the date that the current permit is actually
renewed.
6. In the "Supplement to Permit Cover Sheet," part 1, the plant description does not agree with the
description that was submitted in our renewal application, which accurately describes the very
complex facility. Some of the specific errors are:
a. There are no trickling filters at McAlpine Creek WWTP as stated in this section
b. "aeration basin" should be "aeration basins"
c. "gravity sludge centrifuges and thickeners" should be "centrifuges and gravity sludge
thickeners."
7. In section A.(1.) of the draft permit, please clarify "daily" when used in the "Measurement
f(,d Frequency" column, to mean five days per week excluding weekends and/or holidays. This is
our understanding of the definition based on current practices, and we would like to see this
defined in the permit.
' . In section A.(1.) of the draft permit, the limits shown for Total Residual Chlorine are different
from the existing permit. The existing permit has a weekly average limit of 17 pg/I and a daily
0 average (not daily maximum) limit of 28 pgll. Please revise the draft permit to reflect the current
permit conditions, or explain why there is a change and allow additional time for comments.
. In section A.(1.) of the draft permit, the daily maximum level of nickel is shown as 261 pg/I. The
• existing permit limit is 360 pg/I . Please explain why this has changed and alto dditional time �.6,
(4t • for us to comment or revise the draft permit to reflect the current permit limit.iCtL i \ 1
he footnotes to the table in section A.(1.) of the permit state that whole effluent toxicity
pies are to be taken quarterly in March, June, September, and December. Please
ference the enforcement procedures placed into effect by the August 26, 1999, letter from
Matt Matthews, Supervisor, Aquatic Toxicology Unit, and clarify that this enforcement policy
recognizes quarterly compliance based on quarters that begin in March, June, September, and
December.
11. Also related to the footnotes, please clarify how the cyanide and mercury quantitation levels of
10 pg/I and 0.2 pg/I respectively affect laboratory test procedure requirements. Part II Section
D.4. of the draft permit says that "all test procedures must produce minimum detection and
reporting levels that are below the permit discharge requirements" and that if no laboratory
procedures are available that meet this requirement, "then the most sensitive (method with the
lowest possible detection and reporting level) approved method must be used." Do the
AtIV footnotes exempt cyanide and mercury from this requirement? Is it acceptable to use a
laboratory procedure with a reporting limit of 10pg/I for cyanide and 2 pg/I for mercury? Please
clarify what laboratory methods and quantitation levels should be used for these two parameters
�_ in a way that clearly does not conflict with other permit provisions. Utilities may need additional
to review and comment on proposed changes.
on A.(2.) describes the instream monitoring requirements. The locations for the dissolved
ygen parameter appear to contain several typographic errors. We believe that the location list
should read "IC1, SC2, SC3, SC4, SC5, LSC1, MC1, MC2."
In Section A.(2.), if it is DENR's intent to add location LSC3 to dissolved oxygen, temperature,
and conductivity sampling requirements, please explain why and allow Utilities an opportunity to
/comment.
14. We request that the June — September sampling frequency for instream parameters dissolved
oxygen, temperature, conductivity, and pH be reduced from 3/week to 1/week. Utilities does not

believe that this reduced sampling frequency will have any negative impacts on water quality.
The proximity of these streams to heavy development and the monitoring programs in place
through Utilities and Mecklenburg County Department of Environmental Protection help ensure
that spills are located promptly. Daily effluent monitoring will detect treatment problems. The
seasonal requirement for sampling three times a week seems to be a large investment of
resources that doesn't produce any useful information.
15. Section A.(4.) Nutrient Study proposes to require a study "that fully investigates the feasibility of
reducing total phosphorus (TP) load at this WWTP." The explanation in this section does not
lead us to a clear understanding of the purpose or required scope of this study. Please explain a
\:17--)
in more detail the scope DENR proposes to require. 4-1-1) cvrccs °A. 1I
yailr, eVctly
4cd /eliuc0"‘
ircre" swrce5 — irv<</i
Depending on the scope of this study, the proposed schedule may present a problem. If th�1/4-`P�
scope of this work is large enough to require inclusion in our Capital Improvement Plan budget
(which we are preparing now), funds may not be available until July 2001 when our next fiscal 7,,`
year begins. That would only allow 7 months to complete the study and comply with the
February 1, 2002, submittal date DENR proposes. Agin, depending upon the scope required,
�y this may not be enough time. Vov c +�� c "�Trt ,s,00ur- nA-od. c&4 C)„
16. Why is Part I Section B. Schedule of Compliance included in tIIe draft permit when it does not
appear that there are any compliance schedules involved?
17. Part II Section C. 2. Proper Operation and Maintenance refers to "adequate laboratory controls
6? and appropriate quality assurance procedures." Please confirm that North Carolina Laboratory
9e Certification Regulations satisfy this requirement.
One you have had an opportunity to review this letter, we request a meeting with you and other DENR
staff that may be appropriate to discuss these issues. Please contact me (704-391-5098 or
Bgullet anci.charlotte.nc.us) or my assistant, Lynda Elliott (704-391-5070 or Lelliottci.charlotte.nc.us)
to schedule a meeting.
Sincerely,
CHARLOTTE MECK.LENBURG UTILITIES
arry M. dul et' PE
Deputy Director
C: Dave Goodrich
Rex Gleason
Doug Bean
Mike Boyd
Jackie Jarrell
Kim Neely
File

NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request
Facility
CMUD - McAlpine Creek
Permit #
NC0024970
Region
Mooresville
Requestor
Natalie Sierra
Pretreatment A_D Towns- Keyes McGee (ext. 580)
Contact E-L Towns- Vacant Position
M-R Towns- Dana Folley (ext. 523)
S-Z Towns- Steve Amigone (ext 592)
FLIP 5/31
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 isINACTIVE
2) the facility has no SIU's and does not have a Division approved Pretreatment Program
3] t has (or is developing) a Pretreatment Program
2a) is Full Program wlfF�i CT tvl`P j or 2b) 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 Actual
% Industrial $, 5, 5'
STMP time frame:
most recent
Domestic - a
next cycle
% I. 7 , 3
L
T
M
P
Pollutant
Check List
POC due to
NPDESlNon-
Discharge
Permit Limit
Required
by EPA'
Required by
503 Sludge"
POC due to SIU**"
Site specific POC (Provide ExplanatIon)'•"
STMP V
Frequency
effluent
at
LTMP
Frequency at
effluent
/
BOD
4
Q M
iTSS
4
Q M
NH3
4
Q M
i
Arsenic
4
Q M
'
Cadmium
4
4
Q M
4
Chromium
4
4
Q M
4
Copper
4
4
Q M
."
Cyanide
4
Q M
4
Lead
4
4
Q M
Mercury
4
Q M
1
Molybdemum
4
Q M
4
Nickel
4
4
Q M
i
Silver
4
Q M
/
Selenium
4
Q M
4
Zinc
4
4
Q M
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 i1 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 (ie-Chloride to a POTW who accepts Textile waste)
0= Quarterly
M=Monthly // /
Comments: 7aio �c,-ffaa of 4i, e .../s kJ, �� �' /' " sa ..V./ 74Z �a-�
t € r r
NPDES_P I RFform.000804.xls
Revised: August 4, 2000

McAlpine Creek Wastewater Treatment Plant
NPDES Permit # NC0024970
Headworks Long Term Monitoring Plan
Activated Sludge/Anaerobic Digester
with Land Application of Biosolids
A. Sampling Points (See Figure 1)
1. Influent (prior to mixing with side streams)
2. Effluent (after disinfection)
3. South Primary Effluent
4. North Primary Effluent
5. North Trickling Filter Effluent
6. South Aeration Tank Effluent
7. North Aeration Tank Effluent
8. South Final Clarifier Effluent
9. North Final Clarifier Effluent
10. Sludge to Digester
11. Sludge to Centrifuge
12. Centrifuge Centrate
13. Permitted SIU's
a. There are currently 42 SIU's permitted to discharge to the McAlpine Creek WWTP. Charlotte -Mecklenburg
Utility Department -Industrial Waste Pretreatment Program (CMUD-IWPP) permits identify both location
and frequency for monitoring.
B. Pollutants of Concern (P.U.C.)
1. Biochemical Oxygen Demand (BOD), Carbonaceous Biochemical Oxygen Demand (C-BOD), Total Suspended
Solids, Ammonia -Nitrogen, Arsenic, Cadmium, Chromium, Copper, Lead, Mercury, Molybdenum, Nickel,
Selenium, Zinc, Cyanide, Silver and percent solids of the sludge.

C. . Flow
1. Wastewater treatment plant (as measured at the location indicated in the enclosed diagram)
2. Sludge to disposal Flow will be calculated.
D. SIU Monitoring
1. To be conducted as indicated in each individual permit.
a. Permittees are required to self -monitor at least four days every six months and as frequently as four days
each month (dependent on the contribution to the POTW).
b. Charlotte -Mecklenburg Utility Department, System Protection Division monitors all SIU'sat a minimum of
four days every quarter (i.e. Jan.- Mar., Apr. - Jun.).
F. Sampling Frequency
Sampling Point
First Six Months
Thereafter
1. Influent
Monthly for an entire 7-day week and
per NPDES requirement
Monthly and per NPDES requirements
2. Effluent
Monthly for an entire 7-day week and
per NPDES requirement
Monthly and per NPDES requirements
3. South Primary Effluent
Monthly for an entire 7-day week
Monthly on any work day except Monday
4. North Primary Effluent
Monthly for an entire 7-day week
Monthly
5. North Trickling Filter Effluent
Monthly for an entire 7-day week
Monthly
6. South Aeration Tank Effluent
Monthly for an entire 7-day week
Monthly
7. North Aeration Tank Effluent
Monthly for an entire 7-day week
Monthly
8. South Final Clarifier Effluent
Monthly for an entire 7-day week
Monthly
9. North Final Clarifier Effluent
Monthly for an entire 7-day week
Monthly
10. Sludge to Digester
Monthly for an entire 7-day week and
per sludge permit and 503 regulations
Monthly and per sludge permit and 503
regulations
11. Sludge to Centrifuge
Monthly for an entire 7-day week and
per sludge permit and 503 regulations
Monthly and per sludge permit and 503
regulation
12. Centrifuge Centrate
Monthly for an entire 7-day week
Monthly
13. Permitted SIU's
Per SIU Permit
Per SIU Permit

G. Sampling Plan
P. O. C.
Pt. 1
Pt. 2
Pt. 3
Pt. 4
Pt.5
Pt.6
Pt.7
Pt.8
Pt.9
Pt.10
Pt.1 1
Pt.12
BOD
x
x
x
x
x
x
x
x
C-BOD
x
x
TSS
x
x
x
x
x
x
x
x
NH3-N
x
x
x
x
x
x
x
x
As
x
x
x
x
x
x
x
x
x
x
x
x
Cd
x
x
x
x
x
x
x
x
x
x
x
x
Cr
x
x
x
x
x
x
x
x
x
x
x
x
Cu
x
x
x
x
x
x
x
x
x
x
x
x
Pb
x
x
x
x
x
x
x
x
x
x
x
x
Hg
x
x
x
x
x
x
x
x
x
x
x
x
Mo
x
x
x
x
x
x
x
x
x
x
x
x
Ni
x
x
x
x
x
x
x
x
x
x
x
x
Se
x
x
x
x
x
x
x
x
x
x
x
x
Ag
x
x
x
x
x
x
x
x
x
x
x
x
Zn
x
x
x
x
x
x
x
x
x
x
x
x
CN**
x
x
x
x
x
% solids
x
x
Flow
x
x
x

H. Detection level and Sample Method
P. O. C.
Detection Level (mg/1)
Sample Method
BOD
2
24 hr Composite
TSS
2
24 hr Composite
NH;
0.1
24 hr Composite
As
0.01
24 hr Composite
Cd
0.002
24 hr Composite
Cr
0.005
24 hr Composite
Cu
0.002
24 hr Composite
Pb
0.01
24 hr Composite
11g
0.0002
24 hr Composite
\-10
0.1
24 hr Composite
N i
0.01
24 hr Composite
Se
0.01
24 hr Composite
Ag
0.005'
24 hr Composite
Zn
0.01
24 hr Composite
CN
0.01
Grab
Sampling, Preservation and analytical methods will conform with 40 CFR 136 requirements.
The monitoring program required for the first six months of this Long Term Monitoring Program may be
re -instituted is needed.
**
Cyanide sampling is only required at monitoring points # 1, 2, 6, 7 and 11. The frequency for this
monitoring will be as defined in the sampling plan listed as "Thereafter".

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Percent of Industrial Flow to Total Facility Flow
NPDES # of all POTW
Treatment Plants Receiving
Industrial Wastewater
Irwin Creek - NC0034945
Mallard Creek - NC0030210
McAlpine Creek - NC0024970
McDowell Creek - NC0036277
Sugar Creek - NC0024937
NPDES # of Major POTW s
Irwin Creek - NC0034945
Mallard Creek - NC0030210
McAlpine Creek - NC0024970
McDowell Creek - NC0036277
Sugar Creek - NC0024937
Total Design Flow
(Daily Average-MGD)
FY 2000
15
8
48
6
20
Total Actual Flow
(Daily Average-MGD)
FY 2000
Industrial Users per Facility
10.184
5.587
40.132
4.476
15.253
Number of Categorical Number of Significant
Industrial Users (CIU's) Non -Categorical
Industrial Users
10
2
10
1
11
Total 34
19
30
14
63
Industrial Flow
Recived
% of Actual
FY 2000
11.83%
0.20%
5.37%
0.02%
5.78%
Total
29
2
40
1
25
97

Parameter LTMP NPDES Monitor NPDES limit Potential? LTMP NPDES Monitor NPDES Limit
Arsenic x No x
Cadmium x x No ' x x
Chromium x x Yes x x
Lead x x Yes x x
Copper x x Yes x x
Nickel x x Yes x x
Silver x x Yes x x
Zinc x x Yes x x
Cyanide x x Yes x x
Mercury x Yes x x
Molybdenum x Yes:, x x
Selenium x Yes x x
Lindane x No x

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0024970
Facility Information
Applicant/Facility Name:
Charlotte -Mecklenburg Utilities Department (CMUD) — McAlpine
Creek WWTP
Applicant Address:
5100 Brookshire Blvd.; Charlotte, NC 28216
Facility Address:
US Highway 521, south of Charlotte
Permitted Flow
64 MGD
Type of Waste:
91.8% Domestic
8.2% Industrial
Facility/Permit Status:
Class IV/Active; Renewal
County:
Mecklenburg County
Miscellaneous
Receiving Stream:
McAlpine Creek
Regional Office:
Mooresville
Stream Classification:
C
State Grid / USGS Quad:
G15SE
303(d) Listed?
Yes
Permit Writer:
Natalie Sierra
Subbasin:
03-08-34
Date:
180ctober00
Drainage Area (mi2):
92.4
Summer 7Q10 (cfs)
2
Winter 7Q10 (cfs):
10
30Q2 (cfs)
13.5
Average Flow (cfs):
62.4
IWC (%):
98.02
Lat. 35° 35 70" N Long. 80° 52' 21" W
CY-
BACKGROIT""- Su9af
McAII" `r",\` ° v{,r 'llw
Department (C. W\-"?
of Charlotte, To To-' a —
Mecklenburg cot t^'"
Irwin Creek WW
industrial users (S.
Pretreatment progn
At the time of the last permit renewal, the facility had applied for an Authorization to
Construct (ATC) that would allow for a plant expansion to 64 MGD. The 1996 permit was
therefore a phased permit, setting limits for both the 48 MGD and the 64 MGD flows.
Construction on the plant expansion was completed in August 2000 and includes the construction
of three additional aeration basins, new screening and degritting facilities and modifications to
the anaerobic digesters. CMUD also has ATCs to improve process units that have been
identified as odor sources and construct a new chlorine contact basin. In July 1999, CMUD
signed into contract a residuals management plan that provides for guaranteed beneficial re-
use/disposal of plant residuals (including land application and lime stabilization).
rfas a
` of the five Charlotte -Mecklenburg Utilities
sign flow of 64 MGD. The facility serves the City
hews, Town of Pineville, unincorporated areas of
f Union County, and overflow from the CMUD
accepts wastewater from 38 significant
full Long Term Monitoring Program (LTMP) with the
Instream Monitoring and Verification of Existing Conditions and DMR Data Review.
DMRs were reviewed beginning in February 1998 through August 2000. Average flow
during this time was 40.3 MGD. Total residual chlorine values during this time were frequently
below detection level (<5ug/L), indicating adequate dechlorination.
Fact Sheet
NI'I)I?S NC0024970 Renewal
Page I

•
! ry
. +�
ti.
`t,
CMUD-McAlpine Creek monitors for a broad range of metals due to the large industrial
contribution to its wastestream. Data from both the Pretreatment LTMP and the DMRs was used
to assess reasonable potential for arsenic, cadmium, chromium, lead, copper, nickel, silver, zinc,
cyanide, mercury, molybdenum, selenium, and lindane.
Fact Sheet
NPDES NC0024970 Renewal
Page 2

Results of Reasonable Potential Analysis (RPA):
A reasonable potential analysis (RPA) was performed for all monitored parameters. It
was determined that there is reasonable potential for pollution from the following:
• Chromium
• Lead
• Copper
• Nickel
• Silver
• Zinc
• Cyanide
• Mercury
• Selenium
• Molybdenum
• Lindane -'rk
No reasonable potential exists for the following:
• Arsenic
• Cadmium
(5-he be 4?N9e
Copper, Silver, and zinc are all action level pollutants. Since CMUD —McAlpine does
not currently have toxicity problems, these compounds will be monitored only, not
limited. The same applies to molybdenum and lindane, for which no state or federal
standard exists. l_j - -ie,-e 4 s 4 ArLd ,2
al' is O. c i 140
Correspondence: The inspection reports reveal a well -run facility with feW problems. There
have been, however, several NOVs issued per year. The bulk of these have been for bypass
violations relating to sanitary sewer overflow. CMUD-McAlpine Creek WWTP was assessed for
these bypass problems in December 1999. There have also been several violations of the total
residual chlorine limit, but the facility has been in compliance with this limit in the past year.
PERMITTING STRATEGY AND SUMMARY OF PROPOSED CHANGES
A request has been made that a total phosphorus optimization study be conducted by the
facility. Accordingly, a nutrient study special condition has been added to the permit. All other
changes are a result of the RPA that was performed.
Due to finding of reasonable potential, mercury and selenium will be limited in the
NPDES permit. Molybdenum, which, like mercury and selenium, was only in the LTMP, will
now be monitored twice monthly under the NPDES permit due to finding of reasonable potential.
Cadmium, on the other hand, will go from being a limited parameter to a monitored parameter
based on a finding of no reasonable potential.
All the other parameters will remain the same in accordance with the previous permit and
1995 WLA. In that (as well as the current) permit, CBOD, Total Suspended Residue, NH3-N,
fecal coliform, cyanide, lead, chromium and nickel were all water quality limited parameters.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: October 25, 2000
Permit Scheduled to Issue: December 18, 2000
['act Sheet
NPDES NC0024970 Renewal
Page 3

NPDES DIVISION CONTACT
If you have questio s regarding any of the above information or on the attached permit, please contact
Natalie Sierra at 33-5 : - xt. 1.
NAME: DATE:
REGIONAL OFFICE COMMENTS
Se e C'evLtr�e Nrn/ram v( 7151/1 a/ ��Jc s�� 4A)C/
if)ee d /2 V f:$ r9/241,1164,1 * 4 e /ice / c{,
NAME: DATE: // /
SUPERVISOR:
Fact Sheet
NPDES NC0024970 Renewal
Page 4

Division of Water Quality
June 22, 2000
MEMORANDUM
To: NPDES Unit
Through: Dave Goodrich
From: Tom Belnick
Subject: Catawba River Basin- Additional NPDES Permitting Requirements
In addition to the color permitting requirements discussed at the Catawba kickoff meeting held on May
25, 2000, the following Catawba permitting issues need to be addressed by assigned permit writers:
1. Lake Wylie Nutrient Management Strategy. The nutrient strategy in the 1995 Basin Plan required
existing industrial dischargers to complete site -specific nutrient BAT studies before the permit
expiration date. Results of the BAT studies will be used to limit TN and TP for this next permitting
round. BAT studies were required for the facilities listed below. Permit writers for these facilities
will need to evaluate imposing nutrient limits in the draft permits.
• NC0004812 Pharr Yarns
• NC0004376 Clariant
• NC0005274 Crompton and Knowles (now Yorkshire Americas)
• NC0006033 JPS Automotive (now owned by Town of Cramerton)
2. Town of Valdese (NC0041696)- Add Special Condition requiring TP Plant Optimization Study, due
to increasing TP loading from this facility and water quality concerns for the lake systems.
3. CMUD Facilities. Add Special Condition requiring TP Plant Optimization Study for the CMUD
facilities listed below, due to concern of TP loading to downstream South Carolina lakes.
• NC0024970 CMUD/McAlpine
• NC0024945 CMUD/Irwin Creek
• NC0024937 CMUD/Sugar Creek
Cc:
Darlene Kucken
Michelle Woolfolk