NC0024252_Report_20181107

CITY OF CONOVER PUBLIC WORKS DEPARTMENT
P.O. BOX 549 Phone [phone]
CONOVER, NC 28613-0549
November 7, 2018
ECEIVED/DENR/DUWR
Mr. Ron Berry
NCNR/Water Quality NOV 19 2018
I
NPDES Unit
1617 Mail Service Center Waier Resources
Raleigh, NC 27699-1617
Permitting Section
Dear Mr. Berry:
In order to comply with the NPDES permit issued and effective on
December 1, 2016 for the City of Conover' s Northeast Wastewater
Treatment Plant NC0024252 under section A. (6) COMPLIANCE SCHEDULE
FOR TOTAL COPPER, we wish to report on our present efforts to
identify high copper sources . I have included with this
correspondence some spread sheets that look at information on
the NEWWTP copper history for the past 5 years . Out of 155
sample values collected in the past 5 years, 85 were below
detection and 3 values exceeded limits . The last time the limit
was exceeded was 3 years ago on 1/27/16. This was prior to when
limits were imposed on our permit . At that time we were not
clear on what level of copper concentration was of concern so we
did not have the opportunity to investigate further. Our spikes
in copper were intermittent, many months apart, with no apparent
pattern. In August and September of 2016 we conducted 22
sampling events to try to establish if spikes were occurring and
if there was any pattern to excessive amounts of copper entering
the plant. We found no excessive values during this time of
increased monitoring. In the event we detect spikes in copper
values we will immediately increase effluent monitoring. We will
set up samplers on strategic areas in our collection system to
identify possible areas where the spikes are occurring. We will
investigate these areas identifying users and conduct
inspections to seek the sources of elevated copper discharge. We
will then take action to eliminate excessive discharge.
In the event you have questions comments, or need further
information please call me at (828) 465-2279 .
Si.-1y, / ,�►_
Michael Fox
Wastewater Treatment and Collection Supervisor

EFFLUENT CHARACTERISTICS
Monthly
Average
Flow 1.5 MGD
Total Copper 1 28.9 µg/L ,

Date mg/I ug/I values>0 > limit monthly average daily max
1/6/2013 <0.005 0
1/14/2013 0.005 5 5 25.3 ug/I 31.4 ug/I
2/6/2013 <0.005 0
2/14/2013 <0.005 0
3/13/2013 <0.005 0
3/21/2013 <0.005 0 ,
4/11/2013 <0.005 0
4/18/2013 <0.005 0
5/10/2013 <0.005 0
5/23/2013 0.006 6 6
6/5/2013 <0.005 0
6/12/2013 <0.005 0
7/9/2013 0.009 9 9
7/25/2013 <0.005 0
8/15/2013 <0.005 0
8/28/2013 0.007 7 7
9/10/2013 0.005 5 5
9/28/2013 <0.005 0
10/9/2013 <0.005 0
10/23/2013 0.007 7 7
11/7/2013 0.008 8 8
11/25/2013 ,0.008 8 8
12/10/2013 <0.005 0
12/27/2013 <0.005 0
1/9/2014 <0.005 0
1/21/2014 <0.005 0
2/6/2014 <0.005 0
2/20/2014 <0.005 0
3/12/2014 0.006 6 6
3/26/2014 <0.005 0
4/10/2014 0.006 6 6
4/30/2014 <0.005 0
5/15/2014 0.008 8 8
5/30/2014 <0.005 0
6/11/2014 <0.005 0 .
6/24/2014 <0.005 0
7/10/2014 <0.005 0
7/24/2014 <0.005 0
8/7/2014 0.006 6 8
8/27/2014 0.117 117 117 117
9/10/2014 '0.006 6 6
9/25/2014 <0.005 0
10/9/2014 0.018 18 18 a
10/22/2014 0.007 7 7
11/6/2014 0.009 9 9
11/26/2014 0.006 6 6

12/9/2014 <0.005 0
12/20/2014 <0.005 0
1/14/2015 0.008 8 8
1/27/2015 0.0051 5.1 5.1
2/10/2015 0.0082 8.2 8.2
2/24/2015 0.0067 6.7 6.7
3/11/2015 <0.005 0
3/25/2015 <0.005 0
4/8/2015 <0.005 0
4/22/2015 <0.005 0
5/7/2015 <0.005 0
5/20/2015 0.005 5
6/10/2015 0.1 100 100 100
6/25/2015 <0.005 0
7/9/2015 9.006 6 6
7/20/2015 0.006 6 6
8/6/2015 <0.005 0
8/20/2015 <0.005 0
9/2/2015 0.005 5 5
9/24/2015 <0.005 0
10/7/2015 0.009 9 9
10/21/2015 0.008 8 8
11/11/2015 0.008 8 8
11/24/2015 <0.005 0
12/9/2015 <0.005 0
12/21/2015 <0.005 0
1/12/2016 <0.005 0
1/27/2016 0.054 54 54 54
2/10/2016 <0.005 0
2/23/2016 <0.005 0
3/9/2016 0.006 6 6
3/23/2016 <0.005 0
4/12/2016 <0.005 0
4/26/2016 <0.005 0
5/12/2016 <0.005 0
5/26/2016 <0.005 0
6/8/2016 <0.005 0
6/22/2016 <0.005 0
7/6/2016 <0.005 0
7/21/2016 <0.005 0
8/3/2016 <0.005 0
8/10/2016 0.009 9 9
8/16/2016 0.006 6 6
8/17/2016 0.006 6 6
8/18/2016 0.005 5 5
8/23/2016 0.008 8 8
8/24/2016 0.008 8 8

8/25/2016 0.008 8 8
8/30/2016 0.006 6 6
8/31/2016 0.006 6 6
9/1/2016 <0.005 0
9/7/2016 0.005 5 5
9/8/2016 <0.005 0
9/9/2016 0.005 5 5
9/13/2016 0.006 6 6
9/14/2016 <0.005 0
9/15/2016 0.008 8 8
9/20/2016 0.008 8 8
9/21/2016 0.007 7 7
9/22/2016 0.005 5 5
9/27/2016 0.005 5 5
9/28/2016 <0.005 0
9/29/2016 0.005 5 5
10/4/2016 <0.005 0
10/5/2016 <0.005 0
10/6/2016 <0.005 0
10/11/2016 0.006 6 6
10/12/2016 0.006 6 6
10/13/2016 <0.005 0
10/18/2016 <0.005 0
10/19/2016 <0.005 0
10/20/2016 <0.005 0
10/25/2016 0.006 6 6
10/26/2016 0.007 7 7
10/27/2016 0.007 7 7
11/2/2016 <0.005 0
11/3/2016 <0.005 0
11/4/2016 <0.005 0
11/8/2016 0.012 12 12
11/9/2016 0.012 12 12
11./1/2016 0.011 11 11
11/15/2016 0.006 6 6
11/16/2016 0.005 5 5
11/17/2016 0.009 9 9
11/21/2016 <0.005 0
11/22/2016 <0.005 0
11/23/2016 <0.005 0
12/7/2016 0.009 9 9
1/5/2017 0.007 7 7
2/8/2017 0.00626 6.26 6.26
3/8/2017 0.005 5 5
4/6/2017 0.00221 2.21 2.21
5/4/2017 <0.005 < 0
6/7/2017 0.00584 5.84 5.84

7/6/2017 0.00241 2.41 2.41
8/9/2017 0.005 5 5
9/13/2017 0.007 7 7
10/11/2017 <0.005 < 0
11/8/2017 0.007 7 7
12/6/2017 0.001 1 1
1/4/2018 <0.005 0
2/15/2018 <0.005 0
3/7/2018 0.00173 1.73 1.73
4/11/2018 <0.005 0
5/9/2018 0.006 6 6
6/6/2018 '0.002 2 2
7/11/2018 0.002 2 2
8/8/2018 0.002 2 2

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SLUDGE average 29 4 28.9 35.3
9.28 mg/I 9280 ug/I 28.9 35.3

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8/27/2014 0.117 117 61.5 28.9 35.3 0.485 <2 <2.5 0.32 <1
7/10/2014 0 0 28.9 35.3
7/24/2014 0 0 28.9 35.3
6/11/2014 0 0 28.9 35.3
6/24/2014 0 0 28.9 35.3
5/15/2014 0.008 8 28.9 35.3
5/30/2014 0 0 28.9 35.3
4/10/2014 0.006 6 28.9 35.3
4/30/2014 0 0 28.9 35.3
3/12/2014 0.006 6 28.9 35.3
3/26/2014 0 0 28.9 35.3
2/6/2014 0 0 28.9 35.3
2/20/2014 0 0 28.9 35.3
1/9/2014 0 0 28.9 35.3
1/22/2014 0 0 28.9 35.3
min 0
max 0.117
average 0.008