NC0085359_Permit (Modification)_20150708

NPDES DOCUHENT SCANNING COVER SHEET
NC0085839
Twelve Mile Creek 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
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 8, 2015
This document ion printed on reuiae paper - ignore any
content on the resrerse side

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Richard D. McMillan, P.E.
Union County Public Works .
500 North Main Street, Suite 500
Monroe, NC 28112
Dear Mr. McMillan:
Donald R. van der Vaart
Secretary
July 8, 2015
Subject: Modification of NPDES Permit NC0085359
12-Mile Creek WWTP
Union County
The Division received your request to extend the deadline for compliance with the eDMR submission
requirements on June 25, 2015. Given the unusual challenges your organization faces in completing
registration for eDMR, the Division agrees with your request. This modification changes the deadline for
submission of eDMRs to February 29, 2016. 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). Insert the
attached page into your permit and discard the old page.
Pages 3-17 of your existing permit have been modified. Insert the attached pages into
your permit and discard the old ones.
If any parts, measurement frequencies or sampling requirements contained in this modification 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.
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 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 matter, please contact Charles H. Weaver at (919)
807-6391 or via e-mail [[e-mail]].
ely,
r/27
S. Jay Zimmerman, Dir
Division of Water Resources
cc: Central Files
Mooresville Regional Office
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet; www.ncwaterquality.org
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Permit NC0085359
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
6 MGD
During the period beginning upon the effective date of this permit and lasting until expansion above 6 MGD
or expiration, the Permittee is authorized to discharge from outfall 001. Such discharge shall be limited and
monitored' by the Permittee as specified below:
PARAMETER ;.,
;.a LIMITS• , :. "
' :.. MONITORING`:REQUIREMENTS:__.
Monthly
Average.`
Weekly
Average
Daily
Maximum
Measurement
Frequency
-' Sample
TYpe:
Sample
Location2
Flow
6.0 MGD
•
Continuous
Recording
Influent or
. Effluent
BOD, 5-day, 20°C
(March 1 -October 31)3
5.0 mg/L
7.5 mg/L
Twice per Week
Composite
Influent Effluent
BOD, 5-day, 20°C
(November 1- February 28/29)3
10.0 mg/L
15.0 mg/L
Twice per Week
Composite
Influent &
Effluent
Total Suspended Solids 3
30.0 mg/L
45.0 mg/L
Twice per Week
Composite
Influent &
Effluent
NH3 as N
(March 1-October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
. Effluent
NH3 as N
(November 1- February 28/29)
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
Dissolved Oxygen, mglL
Daily average > 6.0
mg/L
Daily
Grab
Effluent
Dissolved Oxygen, mg/L
(June 1- September 30)
3lVlleek
Grab
U & D
Dissolved Oxygen, mg/L
(October 1- May 31)
Weekly
Grab
U & D
pH
> 6.0 and
< 9.0 standard units
Daily
Grab
Effluent
Total Nitrogen, mglL
(NO2+NO3+TKN)
MonthlyComp
p osite
Effluent
Total Phosphorus 4
Monthly Average: 41.70 pounds/day
12 Month Average: 20.85 pounds/day
Monthly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
Temperature, °C
(June 1- September 30)
31Week
Grab
U & D
Temperature, °C
(October 1- May 31)
Weekly
Grab
U & D
Fecal Coliform
(geometric mean)
200/100 ml
400/100
ml
Twice per Week
Grab
•
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
Effluent Pollutant Scan6
(Parameter code: NC01)
Monitor and Report
6
6
Effluent
Footnotes: •
1. No later than February 29, 2016, the permittee shall begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system [see A. (8)].
2. Upstream: at least 50 feet upstream from the outfall. Downstream samples shall be collected
at each of two locations, D 1 and D2. Di: One quarter mile downstream from the outfall, before
Page 3of17
revised 7/8/2015

Permit NC0085359
confluence with the first tributary. D2: at NCSR 1301. Additional downstream dissolved
oxygen monitoring is recommended to provide DO stream profile of Twelve Mile Creek in
North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15% of the respective influent value (85% removal).
4. Condition A. (6) describes the methodology for calculation of the monthly average and 12-
month limits.
5. Chronic Toxicity (Ceriodaphnia) P/F @ 90% with testing in February, May, August, and
November [see A. (5)].
6. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see
A. (7)].
There shall be no discharge of floating solids or visible foam.
Page 4 of 17 revised 7/8/2015

Permit NC0085359
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
7.5 MGD
During the period beginning upon expansion above 6 MGD and lasting until expiration or expansion above
7.5 MGD, the Permittee is authorized to discharge from outfall 001. Such discharge shall be limited and
monitored" by the Permittee as specified below:
PARAMETER
•.
.. _ _. _., ....
LIMITS . ;
; `;: MONITORING REQUIREMENTS,;
Monthly
Avera a
, e a9.
Weekly
Average
..:: __...�ge � ..:_,
baily '
Maximum
� �� .....
Measurement
Fre ; uenc
_ .. ..<p: ;.... �y ...
Sample
:. ' T pe
Type
- Sample
i 2
.Location ....
Flow
7.5 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5-day, 20°C -
(March- October) 3
5.0 mg/L
7.5 mg/L
Twice per Week7
Composite
Influent &
Effluent
BOD, 5-day, 20°C
(November — February) 3
10.0 m IL
g
15.0 mg/LWeek7
g
Twice per
Composite
Influent &
Effluent
Total Suspended Solids 3
30.0 mg/L
g
45.0 mg/L
g
7
Twice perEffluent
Composite
Influent &
as N
(March - October)
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
as N
(November — February)
1.9 mg/L
5.7 mg/L
Daily
Composite
Effluent
Dissolved Oxygen, mg/L
Daily average > 6.0 mg/L
Daily
Grab.
Effluent
Dissolved Oxygen, mg/L
(June through September)
3/Week
Grab
U & D
Dissolved Oxygen, mg/L
(October through May)
Weekly
Grab
U & D
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Total Nitrogen, mg/L
(NO2+NO3+TKN)
Month" y.
Composite
p
Effluent
Total Phosphorus 4
Monthly Average: 41.70 pounds/day
12 Month Average: 20.85 pounds/day
Monthly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
Temperature, °C
(June through September)
3/Week
Grab
U & D
Temperature, °C
(October through May)
Weekly
Grab
U & D
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Twice per Week7
Grab
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
Effluent Pollutant Scan6
(Parameter code: NC01)
Monitor and Report
6
6
Effluent
Footnotes:
1. No later than February 29, 2016, the permittee shall begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system [see A. (8)].
2. Upstream: at least 50 feet upstream from the outfall. Downstream samples shall be collected
at each of two locations, D 1 and D2. D 1: One quarter mile downstream from the outfall, before
confluence with the first tributary. D2: at NCSR 1301. Additional downstream dissolved
Page 5 of 17
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Permit NC0085359
oxygen monitoring is recommended to provide DO stream profile of Twelve Mile Creek in
North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15% of the respective influent value (85% removal).
4. Condition A. (6) describes the methodology for calculation of the TP monthly average and 12-
month limits. At full permitted flow of 12 MGD, TP mass limits equate to 0.42 mg/L (Monthly
Average) and 0.21 mg/L (Annual Average).
5. Chronic Toxicity (Ceriodaphnia) P/F @ 90% with testing in February, May, August, and
November [see A. (5)] . •
6. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see
A. (7)].
7. Upon expansion above 6 MGD, the Permittee shall revert back to daily sampling of these
parameters. After 6 months of daily sampling, the Permittee may return to twice per week
sampling for the parameters for which no permit limit violations have occurred. •
There shall be no discharge of floating solids or visible foam.
Page 6 of 17 revised 7/8/2015

Permit NC0085359
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS .
9 MGD
During the period beginning upon expansion above 7.5 MGD and lasting until expiration or expansion above
9 MGD, the Permittee is authorized to discharge from outfall 001. Such discharge shall be limited and
monitoredi by the Permittee as specified below:
PARAMETER' ' ' '
LIMITS`
'MONITORING ;REQUIREMENTS''
Monthly
Ave
rage erage
Weekly
. Avera9e `�
Daily
'Maximum
Measurement
Frequency' .
`Sample '
Type _ '
Sample
Location2
Flow
9.0 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5-day, 20°C
March 1 October 31 3
5.0 mg/L
7.5 mg/L
Twice per Week7
Composite
nfluent &
I Effluent
BOD, 5-day, 20°C
(November 1- February 28/29)3
10.0 mg/L
g
15.0 mg/L
g
•
7
Twice per WeekEffluent
Composite
Influent &
Total Suspended Solids 3
30.0 m lL
9
45.0 mg/L
9
7
Twice per WeekEffluent
Composite
Influent &
NH3 as N
(March 1- October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
NH3 as N
(November 1- February 28/29)
1.9 mg/L
5.7 mg/L
Daily
Composite
Effluent
Dissolved Oxygen, mg/L
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Dissolved Oxygen, mg/L
(June 1- September 30)
3/Week
Grab
U & D
Dissolved Oxygen, mg/L
(October 1- May 31)
Weekly
Grab
U & D
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Total Nitrogen, mglL
(NO2+NO3+TKN)
MonthlyComp
p osite
Effluent
Total Phosphorus 4
Monthly Average: 41.70 pounds/day
12 Month Average: 20.85 pounds/day
Monthly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
Temperature, °C
(June 1- September 30)
3/Week
Grab
U & D
Temperature, °C
(October 1- May 31)
Weekly
Grab
U & D
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Twice per Week 7
Grab
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
Effluent Pollutant Scan6
(Parameter code: NC01)
Monitor and Report
6
6
Effluent
Footnotes:
1. No later than February 29, 2016, the permittee shall begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system [see A. (8)].
2. Upstream: at least 50 feet upstream from the outfall. Downstream samples shall be collected
at each of two locations, D 1 and D2. Di: One quarter mile downstream from the outfall, before
confluence with the first tributary. D2: at NCSR 1301. Additional downstream dissolved
Page 7 of 17
revised 7/8/2015

Permit NC0085359
oxygen monitoring is recommended to provide DO stream profile of Twelve Mile Creek in
North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15% of the respective influent value (85% removal).
4. Condition A. (6) describes the methodology for calculation of the TP monthly average and 12-
month limits. At full permitted flow of 12 MGD, TP mass limits equate to 0.42 mg/L (Monthly
Average) and 0.21 mg/L (Annual Average).
5. Chronic Toxicity (Ceriodaphnia) P/F ® 90% with testing in February, May, August, and
November [see A. (5)].
6. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see
A. (7)]
7. Upon expansion above 7.5 MGD, the County shall revert back to daily sampling of these
parameters. After 6 months of daily sampling, the Permittee may return to twice per week
sampling for the parameters for which no permit limit violations have occurred.
There shall be no discharge of floating solids or foam.
Page 8 of 17 revised 7/8/2015

Permit NC0085359
A. (4) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
12 MGD
During the period beginning upon expansion above 9 MGD and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharge shall be limited and monitored'. by the Permittee
as specified below:
PARAMETER
.. _ ..._
...:.. :LIMITS .:
. _ . .
' MONITORING REQUIREMENTS:- ,.
Monthly '
Average
Weekly
Average
_....
Daily
Maimumx
.,.._.:._:_.
Measurement .
Frequency.
. s..:... .
Sample."
w
Type _
. Sample
:Location?
Flow
12.0 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 5-day, 20°C
(March 1— October 31) 3
5.0 mg/L
7.5 mg/L
Twice per Week7
Composite
Influent &
Effluent
BOD, 5-day, 20°C
(November 1— February 28/29)3
10.0 mg/L.15.0
mg/L
Twice per Week?
Composite
Influent &
Effluent
Total Suspended Solids3
30.0 mg/L
45.0 mg/L
Twice per Week7
Composite
Influent &
Effluent
NH3 as N
(March 1— October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
NH3 as N
(November 1— February 28/29)
1.9 mg/L
5.7 mg/L
Daily
Composite
Effluent
Dissolved Oxygen, mg/L
Daily average > 6.0 mglL
Daily
Grab
Effluent
Dissolved Oxygen, mg/L
(June 1- September 30)
3/Week
Grab
U & D
Dissolved Oxygen, mg/L
(October 1— May 31)
Weekly
Grab
U & D
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent •
Total Nitrogen, mg/L
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Total Phosphorus5
Monthly Average: 41.70 pounds/day
12 Month Average: 20.85
oounds/day
Monthly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
Temperature, °C
(June 1- September 30)
3IWeek
Grab
U & D
Temperature, °C
(October 1— May 31)
Weekly
Grab
U & D
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Twice per Week 7
Grab
Effluent
Chronic Toxicity6
Quarterly
Composite
Effluent
Effluent Pollutant Scan7
(Parameter code: NC01) .
Monitor and Report
6
6
Effluent
Footnotes to previous table:
1. No later than February 29, 2016, the permittee shall begin submitting discharge monitoring
reports electronically using NC DWR's eDMR application system [see A. (8)].
2. Upstream: at least 50 feet upstream from the outfall. Downstream samples shall be collected
at each of two locations, D 1 and D2. D 1: One quarter mile downstream from the outfall, before
confluence with the first tributary. D2: at NCSR 1301. Additional downstream dissolved
Page 9of17
revised 7/8/2015

Permit NC0085359
oxygen monitoring is recommended to provide DO stream profile of Twelve Mile Creek in
North Carolina and South Carolina.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15% of the respective influent value (85% removal).
4. Condition A. (6) describes the methodology for calculation of the TP monthly average and 12-
month limits. At full permitted flow of 12 MGD, TP mass limits equate to 0.42 mg/L (Monthly
Average) and 0.21 mg/L (Annual Average).
5. Chronic Toxicity (Ceriodaphnia) P/F @ 90% with testing in February, May, August, and
November [see A. (5)].
6. The permittee shall perform three Effluent Pollutant Scans during the term of this permit {see
A. (7)] .
7. Upon expansion above 9 MGD, the County shall revert back to daily sampling of these
parameters. After 6 months of daily sampling, the Permittee may return to twice per week
sampling for the parameters for which no permit limit violations have occurred.
There shall be no discharge of floating solids or visiblefoam.
Page 10 of 17 revised 7/8/2015

Permit NC0085359
A. (5) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
6.0, 7.5, 9.0, 12.0 MGD
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
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.
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,
DWR Form AT-3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section 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 Water Sciences Section at the address.cited above.
Page 11 of 17 revised 7/8/2015

Permit NC0085359
Should the permittee fail to monitor during a month in which toxicity monitoring is required,
monitoring will be required during the following month. Assessment of toxicity compliance is based
on the toxicity testing quarter, which is the three month time interval that begins on the first day
of the month in which toxicity testing is required by this permit and continues until the final day
of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Resources 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.
A. (6) TOTAL PHOSPHORUS (TP) MONITORING
The Permittee shall calculate a 12-month rolling average mass loading as the sum of monthly
loadings, according to the following equations:
(1) Monthly Average (pounds/day) = TP x Qw x 8.34
Where:
TP = the arithmetic average of total phosphorus concentrations (mg/L) obtained via
composite samples (either daily, weekly, or monthly average values) collected during the
month
Qw = the average daily waste flow (MGD) for the month
8.34= conversion factor, from (mg/L x MGD) to pounds
The 12-month rolling average mass loading is defined as the sum of the monthly average loadings
for the previous 12 months inclusive of the reporting month:
12
(2) 12-Month Average Mass Loading (pounds/day)= E TPma 4-12 (inclusive of reporting
month)
Where:
TPma is defined as the total phosphorus monthly average mass loading (calculated above).
The monthly average and 12-month average mass loadings shall be reported on the attached
worksheet [see next page] and submitted with the Discharge Monitoring Report (DMR) for Twelve
Mile Creek WWTP.
The Permittee shall report the TP concentration for each sample on the appropriate DMR.
Reporting of and compliance with the TP limit shall be done on a monthly basis.
Page 12 of 17 revised 7/8/2015

Permit NC0085359
Reporting Month:
Beginning Month:
Ending Month:
Union County
Twelve Mile Creek WWTP
Nutrient Worksheet
NPDES Permit NC0085359
(Month 1)
(Month 12)
Monthly Average Total Phosphorus
pounds/day
Month 1
Month 2
Month 3
Month 4
Month 5
Month 6
Month 7
Month 8
Month 9
Month 10
Month 11
Month 12
12-Month Mass Average
Loading
Note: The TP mass loadings for the current reporting month should be entered for Month 1.
Page 13 of 17
revised 7/8/2015

Permit NC0085359
A. (7) EFFLUENT POLLUTANT SCAN
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One
scan must be performed in each of the following years: 2016, 2017, and 2018. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are
present in concentrations greater than applicable standards and criteria. Samples should be collected with one
quarterly toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter
every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chtorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
lsophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Reporting. Test results shall be reported on DWQ Form -A MR-PPA1 (or in a form approved by the
Director) by December 31st of each designated sampling year. The report shall be submitted to the following
address: NC DENR / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-
1617.
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Permit NC0085359
A. (8) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
Proposed federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and specify that, if a state does not establish a system to receive such submittals, then
permittees must submit DMRs electronically to the Environmental Protection Agency (EPA). The
Division anticipates that these regulations will be adopted and is beginning implementation.
NOTE: This special condition supplements or supersedes the following sections within Part II of
this permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting [Supersedes Section D. (2.) and Section E. (5.) (a)]
Beginning no later than February 29, 2016, the permittee shall begin reporting discharge
monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report
(eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month
and submitted electronically using eDMR. The eDMR system allows permitted facilities to
enter monitoring data and submit DMRs electronically using the internet. Until such time
that the state's eDMR application is compliant with EPA's Cross -Media Electronic Reporting
Regulation (CROMERR), permittees will be required to submit all discharge monitoring data to
the state electronically using eDMR and will be required to complete the eDMR submission by
printing, signing, and submitting one signed original and a copy of the computer printed eDMR
to the following address:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements
may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1,
1.1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be
submitted to the mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must be
submitted in writing to the Division for written approval at least sixty (60) days prior to the
date the facility would be required under this permit to begin using eDMR. Temporary waivers
shall be valid for twelve (12) months and shall thereupon expire. At such time, DMRs shall be
submitted electronically to the Division unless the permittee re -applies for and is granted a
new temporary waiver by the Division.
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Permit NC0085359
Information on eDMR and application for a temporary waiver from the NPDES electronic
reporting requirements is found on the following web page:
http://portal.ncdenr.org/web/wq/admin/bognputedmr
Regardless of the submission method, the first DMR is due on the last day of the month
following the issuance of the permit or in the case of a new facility, on the last day of the month
following the commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section
B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in
Part II, Section B. (11.)(a) or by a duly authorized representative of that person as described in
Part II, Section B. (11.)(b). A person, and not a position, must be delegated signatory authority
for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR
user account and login credentials to access the eDMR system. For more information on North
Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please
visit the following web page:
http://portal.ncdenr.org/web/wa/admin/bog/ipu/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall
make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF
CERTIFICATION WILL BE ACCEPTED:
"I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
3. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from
the date of the report. This period may be extended by request of the Director at any time [40
CFR 122.41].
A. (9) Mercury Minimization Plan (MMP)
The permittee shall develop and implement a mercury minimization plan during this permit term.
The MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be
available for inspection on -site. A sample MMP was developed through a stakeholder review
process and has been placed on the Division website for guidance
(http://portal.ncdenr.org/web/wq/swp/ps/npdes, under Model Mercury Minimization Plan). The
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Permit NC0085359
MMP should place emphasis on identification of mercury contributors and goals for reduction.
Results shall be summarized and submitted with the next permit renewal.
A. (10) Additional Toxicity Testing Requirements for Municipal Permit Renewal
Please note that Municipal facilities that are subject to the Effluent Pollutant Scan requirements
listed above are also subject to additional toxicity testing requirements specified in Federal
Regulation 40 CFR 122.21(j)(5): The US EPA requires four (4) toxicity tests for a test organism
other than the test species currently required in this permit. The multiple species tests should be
conducted either quarterly for a 12-month period prior to submittal of the permit renewal
application, or four tests performed at least annually in the four and one half year period prior to
the application. These tests shall be performed for acute or chronic toxicity, whichever is specified
in this permit. The multiple species toxicity test results shall be filed with the Aquatic Toxicology
Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit
renewal application to the NPDES Permitting Unit.
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1 J &v e. s r i c,,d - 6 - .),a(5 P
c d e. t e k- (J i t`o- r6
UNION COUNTY
DEPARTMENT OF PUBLIC WORKS
500 North Main Street, Suite 500, Monroe, NC 28112
Phone: [phone] • Fax: [phone]
June 25, 2015
Ms. Julie Grzyb
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Reference: Union County Public Works Department: 12-Mile Creek WWTP (NC0085359)
Subject: eDMR - Request for a 180-Day Extension for Registration & Submittals
Dear Ms. Grzyb:
As part of the issuance of the 12-Mile Creek WTTP Permit, Part 1, Section A(8)1 requires within 270
days of the effective date of the Permit that discharge monitoring reports (DMRs) will be submitted
electronically. Charlotte Water (formerly CMUD) is under contract with Union County to operate and
maintain our wastewater treatment plants.
We understand that Charlotte Water is endeavoring to comply with the eDMR system and coordinating
with NCDENR about modifications. Once Charlotte has resolved their issues and completed their
registration process, we will be ready to register Union County. They anticipate these issues being
resolved within three to four months.
As a result of these issues, Union County Public Works Department is requesting an extension of 180
days for registration and submittals of eDMRs. The original deadline was August 18, 2015, based on
the effective date of the Permit, November 21, 2014. Our request, if granted, would extend that date
to February 14, 2016, for registration and submittals of eDMRs.
If you have any questions, please feel free to contact me at 704-296-4215 or by email at
richard.mcmillan(a�unioncountvnc.gov.
Sincerely,
Ri - - rd D. McMill ti, P..
Assistant Director Public Works
pc: Edward Goscicki, P.E. — Executive Director
Jackie Jarrell, P.E. — Operations Chief, Charlotte Water
Dawn Padgett— Operations Manager, Charlotte Water
500 North Main St., Suite 600 • Monroe, NC 28112-4730 • Phone: [phone] • Fax: [phone]