NC0030210_Permit Modification_20130517

WDES DOCUWEMT SCANNIM6 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:
May 17, 2013
T2zis docvmeat is prated ou reuse paper-1g1xore aay
coateat on the re-%rex-ae side

+10
�";
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P.E.
Governor Director
May 171,2013
Ms. Jacqueline A. Jarrell, P.E., Superintendent
Environmental Management Division
Charlotte -Mecklenburg Utilities
4222 Westmont Drive
Charlotte, NC 28217
Subject: NPDES Permit Modification
Permit Number NCO030210
Mallard Creek WRF
Mecklenburg County
Dear Ms. Jarrell:
John E. Skvarla, III
Secretary
Division personnel have reviewed and approved your application for minor modification of the subject
permit. Accordingly we are forwarding the attached modified permit page. Please remove the existing
"Effluent Limitations and Monitoring Requirements" page and replace it with the one attached to this
letter.
This modification changes the upstream sampling site associated with the discharge from its current
location to the Pavilion Boulevard Bridge, further upstream on Mallard Creek. This change is being
made in the interest of the safety of personnel performing the instream sampling. The new monitoring
site should be a safer location at which to access the stream for sampling, as well as providing a suitable
representation of upstream conditions. Use of the modified sampling location will become effective
immediately.
This modification is issued pursuant to the requirements of North Carolina General Statute 143-215.1
and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated October 15, 2007 (or as subsequently amended).
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.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
NoOe Carolina
turally

Ms. Jacqueline A Jarrell, P.E.
NC0030210 Upstream Monitoring Location Modification 2013
p. 2
If you have any questions concerning this permit, please contact Bob Sledge at telephone number (919)
807-6398 or via e-mail at [e-mail].
Si e ,
�L G
arles Wakild,CP.E.
cc: Central Files
Mooresville Regional Office/Surface Water Protection Section
NPDES Permit File
cc: EPA Region 4 — Ben Ghosh
6.

Permit NCO030210
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - 12.0 MGD
During the period beginning May 17, 2013 and lasting until expiration, the Permittee is authorized to
discharge up to 12 MGD of municipal wastewater from outfall 001. Such discharges shall be limited
and monitored by the Permittee as specified below:
Parameter
Effluent Limitations
MonitoHng Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Locationl
Flow
12 MGD
Continuous
Recording
Influent or
Effluent
CBOD, 5 day (20°C)2
[April 1- October 31] ;
4.2 mg/I
6.3 mg/I
Daily
Composite
Influent &
Effluent
CBOD, 5 day (20°C)2
[November 1- March 3 1 ]
8.3 mg/l
12.5 mg/l
Daily
Composite
Influent &
Effluent
Total Suspended Solids?
30.0 mgll
45.0 mgll
Daily
Composite
Influent &
Effluent
NHs as N Aril 1- October 311
1.0 m /I
3.0 m A
Daily
Composite
Effluent
NHs as N Nov.1- March 311
2.0 m /I
6.0 m A
Daily
Composite
Effluent
Dissolved Oxygen
Daily Average > 6.0 m /L
Daily
Grab
Effluent
Dissolved Oxygenl
3Meek
Grab
Upstream &
Downstream
Fecal Coliform(geometric mean
2001100 ml
400/100 ml
Daily
Grab
Effluent
Total Nitrogen 3
Monitor & Report
Monthly
Composite
Effluent
Total Phosphorus
Monitor & Report
Monthly
Composite
Effluent
Temperature °C
Monitor & Report
Daily
Grab
Effluent
Temperature (°C)1
3/Week
Grab
Upstream &
Downstream
Total Zinc !
Monitor & Report
2/Month
Composite
Effluent
Total Mercury
Monitor & Report
21Month
Composite
Effluent
H
Between 6.0 and 9.0 Standard Units
Daily
Grab
Effluent
Chronic Toxicity 4
See Note 4.
Quarterly
Composite
Effluent
Notes:
1. Sample locations: Upstream at Pavilion Boulevard and downstream at NCSR 1300 and at NCSR 1304
(Rocky River). Stream samples shall be grab samples and shall be collected 3/Week during the
months of June, July, August, and September and 1 /Week during the remaining months of the
year. Instream monitoring is provisionally waived in light of the permittee's participation in
the Yadkin -Pee Dee River Basin Association. Should the permittee terminate its
participation in the Association instream sampling shall immediately commence as stated in
this permit.
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed
15% of the respective influent value (85% removal).
3. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is
Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
4. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90%: February, May, August, November;
See Special Condition A. (2.) of this permit.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

CHARLOTIE
.
April 19t', 2013
NCDENR/DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, NC I27699-1617
CITY OF CHARLOTTE
CHARLOTTE-MECKLENBURG UTILITIES
Environmental Management
Re: Request to Change Mallard Creek WRF Upstream Monitoring Location
Mallard Creek WRF — NPDES Permit #NC0030210
Dear NPDES Unit:
Please let this letter serve as Charlotte -Mecklenburg Utility Department's (CMUD's) request to change its
upstream monitoring location (Mallard Creek Above) from its current location behind the plant to a new
location on the Pavilion BLVD. Bridge where the creek passes under the roadway. Our Laboratory Services
Division recently reported that one of our sampling technicians slipped and fell on the creek bank at our
current upstrIeam monitoring location. As a result of this accident, we are requesting a change in our
monitoring location. Please see the attached maps to reference the current upstream monitoring location
and the proposed new monitoring location on the Pavilion BLVD. Bridge.
In addition, per the NPDES Units request, we had Donna Hood with the Mooresville Regional office visit this
location. Donna felt that the proposed site was an acceptable upstream monitoring location and agreed that
it would be a safer location to conduct in stream monitoring. If you have any questions concerning this
request please feel free to contact Shannon Sypolt at 704-336-4581.
Respectfullyf o
u ��A, < ,a
cqu ne A. Jarrell, P.
uperintendent, Environmental Management Division�69
Charlotte -Mecklenburg Utilities
Cc: Darrell Dewitt; Sheryl Haig9
www.charlottenc.gov 1 4222 Westmont Drive I Charlotte, NC 28217 1 PH: 704.336.4407
-A

i C" 0.
r� E � -
i
r
f
•.
i
s '
.5
4 ]I
� o ]
L r 'C
Cr P Abos-
r
Samplira Lonti,r
r
�
U
f
4
�l l

t � I
1.
yL fY I�
-
I
Sheryl Haig
Water Quality Field Supervisor
Charlotte -Mecklenburg Utilities
Laboratory Services Division
4222 Westmont Drive
Charlotte, NC 28217
Office: 704-336-3710
Cell: 704-634-5431
s