NC0023973_Permit (Modification)_20130925

NPDES DOCUMENT SCANNING COVER SHEET
NC0023973
Wilmington Southside WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
__
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
September 25, 2013
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ArA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
. Water Quality Programs
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
September 25, 2013
James R. Flechtner, P.E.
Interim Chief Executive Officer
Cape Fear Public Utility Authority
235 Government Center Drive
Wilmington, NC 28403
Subject: Monitoring Reduction Request — Exceptional Compliance Program
NPDES Peiiuit NC0023973
M'Kean Maffitt WWTP
Class IV Facility
New Hanover County
Dear Mr. Flechtner:
The Division has reviewed your August 30, 2013 request to reduce monitoring for
CBOD, TSS, and Enterococci from daily to 2/week, and for NH3-N from 3/week to 2/week
under the exceptional compliance program. In the existing permit CBOD, TSS, and Enterococci
are limited and are therefore considered eligible for exceptional compliant monitoring reduction.
NH3-N is a monitored toxicant of concern and is not eligible.
Based on the review of reported data from July 2010 through June 2013 and other criteria
the Division concurred that this facility meets the conditions for exception compliance
monitoring frequency reduction for CBOD, TSS, and Enterococci. The required NH3-N
monitoring frequency in your existing permit is 3/week but our records indicate the facility
continues to monitor at a higher frequency. Any further reduction in the required NH3-N
monitoring frequency is denied.
Attached is the modified effluent page for your 12.0 MGD permitted flow with the
reduced monitoring frequency incorporated. Please inserted this modified copy and discard the
replaced page.
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
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] Fax: [phone]
Internet:: www.ncwatereualitv.orq
An Equal OpportunitylAffirmative Action Employer

James R. Flechtner, P.E.
September 25, 2013
Page 2 of 2
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 permits, that may be required.
If you have any questions concerning this permit, please contact Ron Berry at telephone
number [phone] or at email [e-mail].
Sincerely,
Thomas A. Reeder
Attachments
Cc: Wilmington Regional Office/Water Quality Programs
EPA Region IV/Ben Ghosh (email)
Central Files
NPDES File

Permit NC0023973
A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be
limited and monitored by the permittee as specified below:
EFFLUENT
PARAMETER
EFFLUENT
LIMITATION S
MONITORING
REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
• Frequency
Sample
Type
Sample
Location1
Flow
12.0 MGD
Continuous
RecordingInfluent
or
Effluentt
CBOD, 5-day, 20°C 2
25.0 mg/L
40.0 mg/L
2/Week
Composite
Influent and
Effluent
Total Suspended
Solids 2
30.0 mg/L
45.0 mg/L
2NVeek
Composite
Influent and
Effluent
NH3as N
3/Week
Composite
Effluent
Enterococci
(geometric mean)
35/100 mL
276/100 mL
2/Week
Grab
Effluent
Total Residual Chlorine 3
13.0 pg/L
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
pH
Between 6.8 and 8.5 standard units
Daily
Grab
Effluent
Dissolved Oxygen
.Daily
Grab
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Total Nitrogen
(NO2-N+ NO3-N+ TKN)
Monthly
Composite
Effluent
Total Copper
Quarterly
Composite
Effluent
Acute Toxicity 4
Quarterly
Composite
Effluent
Dissolved Oxygen 5
Variables
Grab
U, D
Temperatures
Variables
Grab
U, D
Effluent Pollutant Scan
Monitor and Report
Footnote 7
Footnote 7
Effluent
Footnotes:
1. U = upstream at a point equidistant between the radio tower north of the VVWTP and the northern end of
the dredge spoil island immediately east of the outfall. D = downstream at a point equidistant between
the mouth of Barnards Creek and the southern end of the dredge spoil island immediately east of the
outfall.
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15 %
of the respective influent value (i.e., 85% removal is required).
3. Total Residual Chlorine limit applies if chlorine or chlorine derivative is used for disinfection. The Division
shall consider all effluent TRC values reported below 50 pg/I to be in compliance with this permit. The
permittee shall continue to record and submit all values reported by a North Carolina certified laboratory
even if these values fall below 50 pg/I.
4. Acute Toxicity — (Ceriodaphnia dubia, 24-hour) No significant mortality @ 90 %, March, June, September,
and December [see A (2)].
5. Stream Sampling — The permittee has deferred receiving -stream sampling to the Lower Cape Fear River
Association by memorandum of agreement (MOA). Should this MOA terminate for any reason, the
permittee shall immediately inform the Division in writing and immediately resume instream monitoring in
accordance with this permit.
6. Variable Frequency — Stream samples shall be collected 3/week during the summer months of June, July,
August, and September; samples shall be collected weekly during the rest of the year.
7. The permittee shall perform three effluent pollutant scans during the term of this permit [see A (3)].
There shall be no discharges of floating solids or foam other than trace amounts.

F-pli StA evk
SUMMARY OF REVIEW FOR EXCEPTIONAL PERFORMANCE FOR MONITORING FREQUENCY REDUCTION
DATE: 9/20/13 NAME OF FACILTY: M'Kean Maffitt WWTP
Checked By: rdb NPDES PERMIT: NC0023973
BEGINNING DATE FOR DATA REVIEW: 7/1/10
ENDING DATE FOR DATA REVIEW: 6/30/13
1)Does the facility have more than one civil penalty assessemant for permit limit violations for target
parameters in previous three years?
YES NO N/A
BOD ❑ ❑ 0
CBOD ❑ 0 ❑
TSS ❑ 0 ❑
NH3-N ❑ 0 ❑
FECAL COLIFORM ❑ ❑ 0
ENTEROCOCCI ❑ 0 ❑
2) Have either the Permitee or any of its employees been convicted of criminal violations of the
Clean Wate Act within the prevous five years? METHOD: Letter from Permittee
YES NO
❑ 0
3) Is the facility currently under an SOC for target parameter effluent limit noncomplinace?
YES NO N/A
BOD 0 0 0
CBOD ❑ 0 ❑
TSS 0 0 0
NH3-N ❑ 0 0
FECAL COLIFORM ❑ 0 0
ENTEROCOCCI ❑ 0 ❑
4) Is the facilty on the EPA's Quarterly Noncompliance Report for target parameter limit
violatons?
YES NO N/A
BOD 0 0 0
CBOD ❑ 0 ❑
TSS 0 0 ❑
NH3-N ❑ 0 0
FECAL COLIFORM ❑ 0 0
ENTEROCOCCI ❑ 0 ❑
5) Does the facility meet Exceptional Performance Criterion for target parameters in the previous
three years of reported DMR data?
Three Yrs Three Yrs Previous Yr N/A
Avg Test Limit Test Limit Test
BOD 0
CBOD PASS PASS PASS ❑
TSS PASS PASS PASS ❑
NH3-N FAIL FAIL FAIL ❑
FECAL COLIFORM 0
ENTEROCOCCI PASS PASS PASS ❑

Cape Fear
Public Utility Authority
Stewardship. Sustainability. Service.
pery
James R. Flechtner, PE
Interim Chief Executive Officer
235 Government Center Drive
Wilmington, NC 28403
910-332-6669
[e-mail]
August 30, 2013
Mr. Tom Belnick, Supervisor
NC DENR/DWQ/Complex Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Monitoring Reduction Request - NPDES Permit NC0023973
M'Kean Maffitt Wastewater Treatment Plant
Cape Fear Public Utility Authority (CFPUA)
New Hanover County, North Carolina
Dear Mr. Belnick,
On October 22, 2012, DWQ issued a guidance document that included approval criteria for reducing
monitoring frequencies in NPDES permits for exceptionally performing facilities. Our M'Kean Maffitt
Wastewater Treatment Plant has a history of excellent treatment performance producing an effluent
water quality well below our permit limits. I am requesting a minor permit modification in monitoring
frequency for`CBOD) TSS,Yand Enterococci from daily to two times per week and for NH3- rom three
times per week to two times per week.
I have attached a summary of monitoring results for July 1, 2010 through June 30, 2013 along with
statistical analyses. The data indicates that the plant's discharge consistently meets our permit limits
and that our compliance for the four target parameters is exemplary. Following are our comments for
each of DWQ's approval criteria cited in the October 22 document.
1. This facility has had no civil penalty assessments for permit limit violations for each of the four
target parameters during the past three years.
2. Neither CFPUA nor CFPUA employees have been convicted of criminal violations of the Clean
Water Act within the past five years.
3. This facility is not currently under an SOC for effluent limit noncompliance for the four target
parameters.
4. This facility is not on EPA's Quarterly Noncompliance Report for target parameter limit
violations. Our review of EPA's June Facilities Watch List posted on the ECHO website identified
an invalid listing for SNC DMR non -receipt violations. Vanessa Manuel, Environmental Senior
Specialist in the NCDENR Point Source Branch, has advised that problems with EPA's new
database, ICIS-NPDES, has caused the invalid entries and that she will work with EPA to have
invalid violations and SNC flags removed.

Mr. Tom Belnick, Supervisor
NC DENR/DWQ/Complex Permitting Unit
Southside WWTP
August 30, 2013
Page Two
5. As demonstrated in the attached data summary, the three-year arithmetic mean of effluent
data for CBOD5 and TSS is less than fifty percent of the monthly average permit limit for each of
the parameters. There are no permit limits for NH3-N. The three-year geometric mean of
effluent data for Enterococci is also less than fifty percent of the monthly geometric mean
permit limit.
6. No daily sampling results during the three-year period are over 200% of the monthly average
limit for CBOD5 or TSS.
7. No daily sampling results are over 200% of the weekly average limit for Enterococci.
8. There have been no weekly average limit violations for CBOD5.TSS or Enterococci during the
past year.
9. A reduction in effluent monitoring for this facility should not impair DWQ's assessment of
downstream uses. The consistency of our data over the three-year period supports that a
reduction in the frequency of monitoring should provide sufficient data to evaluate the water
quality of our discharge.
Treatment performance provided by the M'Kean Maffit plant has been consistent during the past three
years producing an exceptional quality wastewater effluent that meets permit limits. Our facility meets
all criteria set by DWQ for granting reduced monitoring frequency.
Please let me know if there are any questions or whether additional information is needed. We await
your review and modification of our permit.
Sincerely,
James R. Flechtner, P.E.
Interim Chief Executive Officer
Attachment
cc: Beth Eckert, Environmental Management Director, CFPUA
Ken Vogt, Wastewater Treatment Superintendent, CFPUA
Geoff Cermak, Wastewater Treatment Supervisor, CFPUA