NC0030210_Permit Modification_20170217

WDES DOCUMENT SCANNINO COVER SMEET
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:
February 17, 2017
This documerit is priazted on reXX0e paper - more aizy
content on the reirerae iaide

Water Resources w
Environmental Quality
February 17, 2017
Ms. Jackie Jarrell, Operations Chief
Charlotte Water
5100 Brookshire Blvd.
Charlotte, NC 28216
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
Subject: Minor Modification for
Downstream Sample Location
NPDES Permit NCO030210
Mallard Creek WRF
Mecklenburg County
Dear. Ms. Jarrell:
The Division of Water Resources (the Division) received a request on February 1, 2017 for a minor
modification of NPDES Permit NCO030210 for Mallard Creek WRF. Charlotte Water is requesting to
relocate the second downstream monitoring location, currently at NCSR 1304 and Rocky River, to Hwy
49 at Rocky River. This request is being made because of safety concerns from an increase in high speed
traffic and insufficient space to park along the shoulder of the road. The new location is approximately a
mile downstream from the current location. To Charlotte Water's knowledge there is not any significant
incoming flow or loading contributions between these locations.
Accordingly, we hereby forward the modified permit pages to change the second downstream sampling
location from NCSR 130 to HWY 49. This location is reported in eDMR as 001D. Please insert these
change pages into your existing permit and discard the old pages.
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 Resources or any
other Federal, State, or Local governmental permits that may be required.
If you have questions, or if we can be of further service, please contact Derek Denard at
[[e-mail]] or call [phone].
Res p ctfully,
S. Jay Zimmerman, Direct
X.
Division of Water Resources, NCDEQ
he: Central Files
NPDES Program Files
MRO Files/ Attn: Corey Basinger
cc: Shannon Sypolt, Charlotte Water [[e-mail]]
Jackie Jarrell, Charlotte Water [[e-mail]]
Richard Farmer [[e-mail]]
!"Nothing Compares, .
State of North Carolina I Environmental Quality
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-707-9000

Permit NCO030210
Part I
A. (I.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - 12.0 MGD
During the period beginning on the effective date of the permit 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 monitored6 by the Permittee as specified below:
Flow
CBOD, 5 day (200C)2
[April 1- October 311
CBOD, 5 day (200C)2
[November 1- March 31 ] j
Total Suspended Solids
NH3 as N Aril 1- Octob' r 31
NH3 as N Nov.1- March 31
Dissolved Oxygen
Dissolved Oxygen'
Fecal Coliform eometric mean
Total Nitrogen 3 -
Total Phosphorus
Temperature °C
Temperature (°C)'
Total Zinc 4
H
Chronic Toxicitys
Effluent Pollutant Scan i
12 MGD Continuous Recording Influent or
Effluent
4.2 mgh 6.3 mgfl 2/Week Composite Influent &
Effluent
8.3 mg/I 12.5 mgfl 2/Week Composite Influent &
Effluent
30.0 mgll
45.0 mgll
2Meek
Composite
Influent &
Effluent
1.0 m fl
3.0 m fl
2/Week
Composite
Effluent
2.0 m A
6.0 m fl
2Meek
Composite
Effluent
Daily Average > 6.0 m /l_
Daily
Grab
Effluent
3Meek
Grab
Upstream &
Downstream
200/100 ml
400/100 ml
2Meek
Grab
Effluent
Monitor & Report
Monthly
Composite
Effluent
Monitor & Report
Monthly
Composite
Effluent
Monitor & Report
Daily
Grab
Effluent
3Meek
Grab
Upstream &
Downstream
Monitor & Report
Quarterly
Composite
Effluent
Between 6.0 and 9.0 Standard Units
Daily
Grab
Effluent
See Note 5.
Quarterly
Composite
Effluent
Monitor & Report
See Condition A. 3.
Footnotes:
1. Sample locations: Upstream at Pavillion Boulevard and downstream at NCSR 1300 and at HWY 49
(Rocky River) [reported in eDMR as 001D]. Stream samples shall be grab samples and shall be
collected 3 / Wee during the months of June, July, August, and September and 1 / Week during the
remaining months of the year. Should the permittee elect to participate in the Yadkin -Pee Dee
River Basin Association, instream sampling shall be provisionally waived.
2. The monthly average effluent CBODs 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. Monitoring for t6tal zinc shall be performed in conjunction with the chronic toxicity test.
5. Chronic Toxicity) (Ceriodaphnia dubia) P/ F at 90%: February, May, August, November; See Special
Condition A. (2i) of this permit.
6. No later than 90 days from the effective date of this permit, begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system. See Special Condition A (6).
Conditions:
THERE SHALL BE ' NO DISCHARGE OF FLOATING SOLIDS OR FOAM VISIBLE IN OTHER THAN
TRACE AMOUNTS. i
Page 3 of 9

Permit NCO030210
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or
significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%.
The permit holder shall perform at a minimum, Quartertu monitoring using test procedures
outlined in the "North Carolina Cei iodaphnia Chronic Effluent Bioassay Procedure," Revised
December 2010, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised- December 2010) or subsequent versions. The tests will be
performed during the months of February, May, August and November. These months
signify the first month of each three month toxicity testing quarter assigned to the facility.
Effluent sampling for this testing must be obtained during representative effluent discharge
and 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 -December 2010) 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, DWR Form AT-3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences
Section no later than 30 days afteithe end of the reporting period for which the report is
made.
Test data shall be complete, accurate, include all supporting chemical/physical
measurements and all concentration/response data, and be certified by laboratory
supervisor and ORC or approved designate signature. Total residual chlorine of the effluent
toxicity sample must be measured and reported if chlorine is employed for disinfection of the
waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity
monitoring is required, the permittee will complete the information located at the top of the
aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number,
county, and the month/year of the report with the notation of "No Flow" in the comment
area of the form. The report shall be submitted to the Environmental Sciences Section at
the address cited above.
Page 4 of 9

APQ CVVI-I.VJewJS
Denard, Derek
From: Bell, Wes
Sent: Friday, February 17, 2017 12:48 PM
To: Denard, Derek
Subject: RE: Modification Request from Charlotte Water for NCO030210 Mallard Creek
Derek,
I don't have a problem with the relocation.
Wes
From: Denard, Derek
Sent: Friday, February 17, 2017 12:44 PM
To: Bell, Wes <[e-mail]>
Subject: Modification Request from Charlotte Water for NCO030210 Mallard Creek
Wes,
What are your thoughts on this permit modification request from Charlotte Water for N00030210 Mallard Creek? They
want to relocate their downstream sampling.
Thanks!
Derek
Derek C Denard
Environmental Specialist
Compliance & Expedited Permitting Unit
N.C. Division of Water Resources
N.C. Department of Environmental Quality
919 807 6307 office
derek.denard()ncdenr.gov
N. C. Division of Water Resources
Water Quality Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
w- !"-'Nothing Compares -
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

CHARLOTTE
WATER
January 12, 2017
RECEIVEEI NCDENWR
FEB 0 12017
NC Division of Water Resources WaterQuality
NPDES Permitting Unit Permitting Section
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Request for minor modification of Mallard Creek WRF NPDES Permit — Change of Second Downstream
Monitoring Location (MCB2 at NCSR 1304)
Mallard Creek WRF — NPDES Permit #NC0030210
Dear NPDES Unit:
Please let this letter serve as Charlotte Wat&s request for a minor modification of NPDES Permit #NC0030210.
Charlotte Water is requesting this modification to relocate its second downstream monitoring location (Mallard Creek
Below 2 at NCSR 1304 and Rocky River) from its current location to a new location on the Hwy 49 Bridge at Rocky
River. Charlotte Water is making this request because our Safety Team recently identified the current location at
NCSR1304 as a safety risk. A substantial increase in high speed traffic due to recent development in the area and
insufficient space on the shoulder of the road to properly conduct safe sampling from the bridge were reasons cited in
the report.
As a result, Charlotte Water is proposing a new second downstream monitoring location at the Hwy 49 Bridge over
Rocky River. This location provides Charlotte Water's field sampling technicians with a safe area to park and a more
substantial shoulder on the bridge from which they can more safely collect their samples. In addition, the proposed
location is roughly a mile downstream of our current location and to our knowledge does not have any significant
incoming flow or loading contributions between these locations. As indicated on the attached maps, inputs to the
creek between the current and proposed locations consists of four intermittent streams producing water only during
rainfall events and one small continuously flowing stream originating from a spring fed lake (the larger of the Twin
Lakes).
Please see the attached maps for reference to the current upstream monitoring location and the proposed new
monitoring location on the Hwy 49 Bridge at Rocky River. Given that this request is being made as the result of a
safety concern your timely response would be greatly appreciated. If you have any questions concerning this request
or if you need any additional information please feel free to contact our Water Quality Program Administrator,
Shannon Sypolt, at 704-3364581.
Respectfully,
(.:
T ui en A. Jarrell, P.
rations Chief, Environmental Management Division
Charlotte Water
Cc: S. Haraden, S. Haig, D. Dewitt, S. Sypolt
Charlotte Water 4222 Westmont Or, Charlotte, NC 28217 charlottewatecorg
lb Operated by the City of Charlotte

Location of Current and Proposed Downstream Sampling Sites
AAVJA DR SW / .
- — BLACKINE(D� -.
� q _
Current Downstream
Sampling Site (SR 1304)
O
Q� 4a fa"
20'
AUTU.NriI DR' Cr! 0 n 4, 1m7.Uan 9
1;. !
�N `, o �t2kes Proposed New Downstream
WDDDSIDE DR +'F' M Sampling Site
sr A
PARALLEL DR
.. _ PLAZA DR q Z
a,v�oRIS DR _ _ •_ \�

5867 Roberta Rd ®
_ Harrisburg, North Carolina'
�,) • Street View - Oct 2016
j
c 4>
I
.I I r
•
s
/A�
f
i
�:
[:•
,JCM1Y is
Hide imagery v

Proposed #2 New Downstream Sampling Site (HWY 49)

NC-49
Harrisburg, North Carolina
StreetVim-Apr2016
U
77
;ell
L7
Oc.
Hide imagery

Proposed #2 New Downstream Sampling Site (HWY 49)

3070 NC-49 Q S
Harrisburg, North Carolina
J&. Street View -Apr 2016