NC0024937_Permit Modification_20140711

NPDES DOCYNENT SCANNING COVER SHEET
NPDES Permit:
NC0024937
Sugar Creek WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
201 Facilities Plan
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 11, 2014
This document is printed on reuse paper - ignore any
content on the reYerse side

Pat McCrory
Governor
AVA
NCDENR
North Carolina Department of Environment and Natural Resources
July 1 1, 2014
Ms. Jacqueline A. Jarrell, P.E.
Operations Chief - Wastewater
Charlotte -Mecklenburg Utility Department
4222 Westmont Drive
Charlotte, North Carolina 28217
Dear Ms. Jarrell:
John E. Skvarla, III
Secretary
Subject: Permit Monitoring Modification
Permit No. NC0024937
Sugar Creek WWTP
Mecklenburg County
Facility Class IV
Division personnel have reviewed and approved your application for a minor modification
of the subject permit. We are forwarding you the revised Section A.(1.), Effluent
Limitations and Monitoring Requirements, with footnotes. You should replace your existing
Effluent Limitations and Monitoring Requirements sheet with this revised page, effective
8/1/2014. This permit revision 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).
DWR guidance regarding the reduction of monitoring frequencies in permits for
exceptionally performing facilities is for NPDES permits only and do not apply to reclaimed
water permits. Please contact Jon Risgaard in the Non -Discharge Permitting Unit if you are
interested in obtaining similar monitoring frequency reductions related to reclaimed water
use.
The changes made in this permit modification include:
• Monitoring frequency reductions for CBOD, TSS, NH3-N, and Fecal Coliform from
daily to twice per week in Sections A.(1.).
The receiving stream, Little Sugar Creek, is listed as an impaired waterbody on the North Carolina
303(d) Impaired Waters List. There is an EPA approved Fecal Coliform Total Maximum Daily
Load (TMDL) for the Irwin, McAlpine, Little Sugar, and Sugar Creek Watersheds. Addressing
impaired waters is a high priority with the Division, and instream data will continue to be evaluated.
If there is noncompliance with permitted effluent limits and stream impairment can be attributed to
your facility, then mitigative measures may be required.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] \ Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer — Made in part by recycled paper

Ms. Jacqueline A. Jarrell, P.E.
July 11, 2014
Page 2 of 2
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
Resources 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 Julie Grzyb by email
([e-mail]) or phone at [phone].
Sincerely,
Thomas A. Reeder, Director
Division of Water Resources, NCDENR
Enclosure: NPDES Permit NC0024937 (Modified pages)
cc: NPDES Unit
Central Files
Mooresville Regional Office/Water Quality Operations
e-copy:
EPA, Region IV
Erin Hall. Mecklenburg County

ENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
July 11, 2014
Ms. Jacqueline A. Jarrell, P.E.
Operations Chief - Wastewater
Charlotte -Mecklenburg Utility Department
4222 Westmont Drive
Charlotte, North Carolina 28217
Subject: Permit Monitoring Modification
Permit No. NC0024937
Sugar Creek WWTP
Mecklenburg County
Facility Class IV
Dear Ms. Jarrell:
Division personnel have reviewed and approved your application for a minor modification
of the subject permit. We are forwarding you the revised Section A.(1.), Effluent
Limitations and Monitoring Requirements, with footnotes. You should replace your existing
Effluent Limitations and Monitoring Requirements sheet with this revised page, effective
8/1/2014. This permit revision 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).
DWR guidance regarding the reduction of monitoring frequencies in permits for
exceptionally performing facilities is for NPDES permits only and do not apply to reclaimed
water permits. Please contact Jon Risgaard in the Non -Discharge Permitting Unit if you are
interested in obtaining similar monitoring frequency reductions related to reclaimed water
use.
The changes made in this permit modification include:
• Monitoring frequency reductions for CBOD, TSS, NH3 N, and Fecal Coliform from
daily to twice per week in Sections A.(1.).
The receiving stream, Little Sugar Creek, is listed as an impaired waterbody on the North Carolina
303(d) Impaired Waters List. There is an EPA approved Fecal Coliform Total Maximum Daily
Load (TMDL) for the Irwin, McAlpine, Little Sugar, and Sugar Creek Watersheds. Addressing
impaired waters is a high priority with the Division, and instream data will continue to be evaluated.
If there is noncompliance with permitted effluent limits and stream impairment can be attributed to
your facility, then mitigative measures may be required.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterquality.org
An Equal opportunity 1 Afrmnalive Action Employer - Made to part by reeled paper

Ms. Jacqueline A. Jarrell, P.E.
July 11, 2014
Page 2 of 2
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
Resources 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 Julie Grzyb by email
([e-mail]) or phone at [phone].
Sincerely,
homas A. Reeder, Director
Division of Water Resources, NCDENR
Enclosure: NPDES Permit NC0024937 (Modified pages)
cc: NPDES Unit
Central Files
Mooresville Regional Office/Water Quality Operations
e-copy:
EPA, Region IV
Erin Hall. Mecklenburg County

Permit NC0024937
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS -FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated municipal and industrial wastewater from outfall 001.
Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics :'
knits : `
=: , Monitorine Reeurrements :'
Monthly
Average
• Weekly
Average
: Daily .
Average.
:. Daily
Maximum
Measurement `
Frequency
Sample
Type .
Sample
Location1
Flow
20.0 MGD
Continuous
Recording
I or E
CBOD, 5-day, 20°C (Summer)Z3
5.0 mg/L
7.5 mg/L
Twice per week
Composite
I, E
CBOD, 5-day, 20°C (Winter)2.3
10.0 mg/L
15.0 mg/L
Twice per week
Composite
I, E
Total Suspended Solids2
30.0 mgiL
45.0 mgiL
Twice per week
Composite
1, E
NH3-N (Summer)3
1.0 mg/L
3.0 mg/L
Twice per week
Composite
E
NH3-N (Winter)3
2.0 mg/L
6.0 mg/L
Twice per week
Composite
E
Dissolved 0xygen4
Daily
Grab
E
Fecal Coliform
200/ 100m1
400/ 100 ml
1000/ 100 ml
Twice per week
Grab
E
pH
Not less
than 6.0 S.U. or
greater than 9.0 S.U.
Daily
Grab
E
Temperature
Daily
Grab
E
Conductivity
Daily
Grab
E
Total Nitrogen
(NO2-N + NO3-N + TKN)
Monthly
Composite
E
Total Phosphorus's
See Special Condition A. (8.) and A. (9.)
Monthly
Composite
E
Nickel, Total
97.7 µg/L
261.0 pg/L
Monthly
Composite
E
Copper, Total 63
15.0 pg!L
22.0 µg/L
Quarterly
Composite
E
Total Phenolic Compounds
_
Quarterly
Grab
E
Chronic Toxicity9
Qtiarterly
Composite
E
Effluent Pollutant Scans
Footnote 9
Footnote 9
E
Footnotes:
1. Sample Location: I- Influent, E - Effluent.
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85 % removal).
3. Summer is defined as the period from April 1 through October 31, while winter is defined as November 1
through March 31.
4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1.
5. See Special Conditions A. (8.) and A. (9.) for total phosphorus limit and reporting requirements.
6. If CMU decides to develop site -specific standards, the proposed course of action should be consistent with
"Interim Guidance on Determination and Use of Water -Effect Ratios for Metals" EPA-823-B-94-001, February
1994. The Division and EPA will review the proposed course of action and may provide comments.
7. The limits stipulated are based on "total recoverable". Alternatively, the permittee may request limits based on
total dissolved as allowed under South Carolina standards.
8. Chronic Toxicity (Ceriodaphnia) at 90%: February, May, August, November (see Special Condition. A. (7.)).
9. The permittee shall perform three Effluent Pollutant Scans during the term of this permit. (See Special
Condition A. (10).
Definitions:
MGD - Million gallons per day mg/L - Milligram per liter ml - Milliliter
µg/L - Micrograms per liter CBOD - Carbonaceous Biochemical Oxygen Demand
Modified page 7/11/2014
Effective 8/ 1 / 2014

NPDES - Monitoring Reduction Frequency Evaluation (JAG)
CMUD - Sugar Creek WWTP NC0024937
Fecal Coliform (2011-4/2014)
1) 7.99 geo avg
< 100/100mL or 50 % of the monthly permit limit
2) 200% of 400/100 mL weekly avg limit = 800/100mL
2011-4/2014 3
4 daily samples > 200% of permit limit
< 20 daily samples exceeded 200% of the 400/100 mL permit limit
3) no more than two weekly average Limit violations in 2013-4/2014 (none on record)
Reduce monitoring Frequency for fecal conform to 2lweek
TSS (2011-4/2014)
1) 30 mg/L monthly average permit Limit
15 = 50% of monthly average permit limit
2.8 three-year average is < 50% of the monthly average permit limit
2) 200% of monthly average permit limit= 60 mg/L
2011-4/2014 0
no daily samples exceeded 200% of the monthly average limit
3) no more than two weekly average limit violations in 2013-4/2014 (none on record)
Reduce Monitoring Frequency for TSS to 2/week
NH3-N (2011-4/2014)
1) 7/12'1 mg/L + 5/12'2 mg/L = 1.42 mg/L weighted, annual monthly average
0.71 = 50% of wt. annual monthly average
0.185579196 three-year average is < 50% of the weighted annual monthly average limit
2) 200% of summer monthly avg. limit = 2 mg/L summer values > 2
2011 0 2012 0 2013 0
no daily samples exceeded 200% of the monthly average summer limit
200% of winter monthly permit Limit = 4 mg/L winter values > 4
2011 0 2012 0 2013 0
2014 0
2014 0
no daily samples exceeded 200% of monthly average winter limit
Total - no daily samples exceeded 200% of the monthly summer and winter averages (15 allowed)
3) no more than two weekly average limit violations in 2013-4/2014 (none shown)
Reduce Monitoring Frequency for NH3-N to 2lweek
CBOD (2011-3/2014)
1) 7/12*5 mg/L + 5/12'10 mg/L = 7.08 mg/L weighted, annual monthly average
3.54 = 50% of wt. annual monthly average
2.209209 2.21 three-year average is < 50% of the weighted annual monthly average limit
2) 200% of summer monthly avg. limit = 10 mg/L summer values > 10
2011 0 2012 0 2013 0 2014 0
no daily samples exceeded 200% of the monthly average summer limit
200% of winter monthly permit limit = 20 mg/L winter values > 20
2011 0 2012 1 2013 0 2014 0
one daily sample exceeded 200% of monthly average winter limit
only 15 exceedances allowed -1 accounted for
3) no more than two weekly average Limit violations in 2013-4/2014(none on record)
Reduce Monitoring Frequency for CBOD5 to 2/week

CHARLOTTE .,.
May 1st, 2014
NPDES Permitting Unit
NC-DWR
1617 Mail Service Center
Raleigh, NC 27699-1617
CITY OF CHARLOTTE
CHARLOTTE-MECKLENBURG UTILITIES
Environmental Management
RECEIVED/DENR/DWR
MAY 3 0 2014
Water Resources
Permitting Section
Re: Request for Reduced Monitoring Frequencies for Exceptionally Performing Facilities —
Sugar Creek WWTP — NPDES Permit #NC0024937
Dear NPDES Unit:
Experts 01/Zo6
Please consider this letter as Charlotte -Mecklenburg Utility Department's request for a minor modification to
Sugar Creek's NPDES permit. We are requesting a reduction of monitoring frequencies for CBOD, TSS,
NH3, and fecal coliform since Sugar Creek WWTP exceeds the criteria for an exceptionally performing
facility as outlined in the Division of Water Quality's guidance.
Enclosed is the three year data summary of Sugar Creek WWTP's effluent data and DWQ's criteria. Please
note that even if our request is approved, the Utility Department will likely continue to monitor at a frequency
greater than what would be required based on our exceptional history of compliance with these parameters.
If you would like a copy of the raw data set please let us know and we will make it available to you at your
request.
Please also let us know if you have any questions or if you need any further information. If you do, please
call Shannon Sypolt, Water Quality Program Administrator, at 704/336-4581 or Billy Allen, ORC of Sugar
Creek WWTP, at 704/556-9397. You may also contact me at 704/336-4460. Thank you for your assistance
with this modification.
Respectfully,
I
acqu ne A. Jarrell, P.
Operations Chief - Wastewater
Charlotte -Mecklenburg Utility Department
Cc: B. Allen, S. Sypolt
www.charlottenc.gov 14222 Westmont Drive I Charlotte, NC 28217 I PH: 704.336.4407

Data Summary for Reduced NPDES Permit Monitoring Frequency
Data Results and Approval Criteria for Sugar Creek WWTP
Data Set - March 1, 2011 - February 28, 2014
Parameters Monthly Weekly # of 3- Year 50% of # of Results > 200 % # of Results > 200 Max
Limits Limits Samples Results Monthly monthly average % weekly average Daily
Average Limit (CBOD, TSS, NH3) (fecal coliform) Result
CBOD
Summer
5
7.5
455
0.398
2.5
0 of 15
N/A
8.8
Winter
10
15
309
0.623
5
0 of 15
N/A
11
NH3
Summer
1
3
455
0.06688
0.5
0 of 15
N/A
2
Winter
2
6
309
0.18006
1
0 of 15
N/A
3.3
TSS
30
45
765
Fecal Coliform
200
400
757
Approval Criteria Met:
0.60288
15
0 of 15
N/A
7.7
100
N/A
3 of 20
15
3000
1) This facility has not received a civil penalty for a permit violation of the target parameters in the last three years
2) Neither the permitee nor any of its employees have been convicted of criminal violation of the CWA with the previous five years
3) This facility is not under an SOC for target parameter effluent limit noncompliance
4) This facility is not on EPA's Quarterly Noncompliance Report for target parameter limit violations
5) This facility's three year arithmetic mean is less than fifty percent of the monthly average permit limit for CBOD, TSS, and NH3-N
6) This facility's three year geomean is less than fifty percent of the monthly average permit limit for fecal coliform
7) Less than 15 daily sampling results over the three year review period are in excess of 200% of the monthly average for CBOD, TSS, and NH3
8) Less than 20 daily sampling results over the three year review period are in excess of the 200% of the weekly average for fecal coliform
9) This facility has not received any non -monthly average limit violations in the past year for the four target parameters