NC0086169_NOV2019TX0020_RESPLTR_20190507

Corning incorporated t704-569-6100
CORNING 14556 hiwy 601 South www.coming.com
Midland, NC 25107
May 7, 2019
Cindy Moore, Supervisor Aquatic Toxicology Branch
Division of Water Resources
North Carolina Department of Environmental Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Re: Corning Incorporated, Concord Facility
NPDES Permit NC0086169
Notice of Violation: NC NOV-2019-TX-0020
Dear Ms. Moore:
In response to your March 29 letter, I want to make you aware that we have taken immediate and
appropriate measures to reduce effluent toxicity after the January 2019 quarterly toxicity test
failure. Our facility plan includes removal of toxicants that occur as a result of production
increases. We took immediate actions to reduce toxicity and have accelerated plans for a longer
term, more cost effective method for removal of toxicants. We are pleased to report that our full -
range effluent testing in February and March (enclosures 1 and 2), along with pass/fail effluent
testing in April (enclosure 3) have each resulted in passing toxicity measurements. The February
and March results have already been electronically submitted and the April results will submitted
this week. Corning takes our environmental stewardship seriously and we are applying appropriate
resources to prevent this incident from recurring in the future.
Since ely
i
Don L. Hefner
Plant Manager
cc: Wes Bell
Mooresville Regional Office
601 East Center Avenue
Mooresville, NC 28115
Encl. lab reports (3)

Final Control Mortality %1 0
% Control 3rd Brood 100
Control Repro CV 6.481
48 Hour Mortality
Control IWC
0 of 10 0 of 0 LO
Signdicant Y
Final Mortality Si iflcant
or No Cone.
Repro. LOEC = 1 % NOEC - 0.75%
Method: Dunnett's T-Test
1 2 3 4 5 6 7 8 9 10 Mean Normal Distrib? yes Method: Kolmogorov
Effluent %
I
Effluent Aquatic Toxicity Report/Phase U Chronic Ceripodaphnia 03/06/19
tcility Corning NPDES#NC 0086169 Pipe# 003 County Cabarrus
tboratory Performing Test Research & al L ,1nc. Comments: Final Effluent
X __
gnature of O.R.C. Si](daW 6f 10 Supervisor I RAL #'s 63457-01/63541-01
Sample Information
Sample l
Sample 2
Control
Collection Start Date
02/25/19
02/27/19
Grab
Composite
(Duration)
24 hrs.
24 hrs.
Hardness (mgA)
48
Spec.Cond. (µmhoskm)
19,305
19,300
189
Chlorine (mg/L)
<0.01
0.01
Sample temp. at receipt
3.40
3.40
Control
Effluent %
0.5
Effluent %
LO.
75
Test
Information*
Start Date
02/27/19
Start Renew 1
25/o 2%
End Date
03/06/19
Renew Start
20/o Control
Stan Time
10:37 AM
Renew I
Control
End Time
9:02 AM
Renew
Control
Treatment
pH Initial
pH Final
D.O. Utiai
D.O. Final
Temp. Initial
Temp. Final
6.94
6.93
6.96
6.93
6.92
6.96
7.01
7.02
7.05
7.00
7.01
7.04
8.5
8.5
8.6
8.5
8.5
8.6
8.3
8.2
8.3
8.3
8.2
8.4
24.3
24.2
24.3
24.3
24.2
24.3
25.2
25.0
25.1
25.2 1
25.0
25.1
Or and, ism#
1 2 3 4 5 6 7 8 9 10 11 12 Mean
# Young
22
21
22
24
23
25
21
25
23
24
23.0
Adult
(L)ive (D)ead
L
L
L
I L
L
L
L
L
L
I L
1 2 3 4 5 6 7 8 9 10 11 12 Mean
# Young
21
23
22
23
21
22
24
22
25
21
22.4
Adult
(L)ive(D)ead
L
L
L
L
L
L
L
I L
L
L
%Red t
2.61
1 2 3 4 5 6 7 8 9 10 Mean
# Young
23
21
23
21
22
21
23
21
22
21.9
Adult
(L}ive (D)ead
L
L
L
L
L
L
L
L
L
%Red
4.78
::L
# Young
22
20
21
23
21
22
20
23
22
21
21.5
Adult
(L)ive (D)ead
L
L
L
L
L
L
L
L
L
L
% Red
6.52
Method: Steels Many One
to exit% Rank Stun Critical Sum
1 2 3 4 5 6 7 8 9 10 Mean
Effluent % # Young 3 3 3 4 3 3 4 3 4 3 3.3 Overall Analysis:
Adult % Red Result = PASS[FAIL or
2 95.7 Test LOEC = 2 %: NOEC= 1.5 %
Wive nad L L L L L L L L L L Chronic Value= 1.73 %
A77. Environmental Sciences Branch • Should use highest test concentration or
Di. Of Water Quality highest concentration with D.O. >5.0 mg/l
L N.G DENR
To. 1623 Mail Service Center 1 % Reduction from Control Reproduction Mean
Raleigh, NC 27699-1623
Copy DWQ form AT-3 (8/91) Rev.11195
Statistic: 0.8313 Critical: 1.035
Equal Variances? Les Method: Bartieu's
Statistic: 11.6 Critical: 15.1
1 2 3 4 5 6 7 8 9 10 Mean Non-Patamehic Analysis (tom ham):
Effluent %
1.5
# Young
18
19
21
17
19
19
17
19
18
21
18.8
Adult
% Red
(L)ive (D)ead
L
L
L
L
L
L
L
L
L
L
18.3

Effluent Aquatic Toxicity Report/Phase II Chronic Ceripodaphnia 03/20/19
cility Corning NPDES#NC 0086169 Pipe# 003 County Cabamts
boratory Performing Test Research 4jna1yOOjLabs,1 . ®® Comments: Final Effluent
_X_
plature of O.R.C. S' tur La upervisor I RAL #/s 64047-01/64166-01
Sample Information
Sam le 1
Sam�plle2
Control
Collection Start Date
03/11/19
03/13/19
Ea;1
Grab
Composite
(Duration)
24 hrs.
24 hrs.
Hardness m
::.-
� � •`.. �, ..� `_:.i
48
20,860
Spec.Cond.4anhos/cm)
21,070
192
Chlorine (mg/L)
0.01
0.01
Sample temp. at receipt 1
3.40 1
2.90
.7
Control
Effluent %
0.5
Effluent %
0.75
Effluent %
EJ
Effluent %
1.5
Effluent %
El
Tel
Information®
Start Date
03/13/19
Start Renew 1
2% 2%
End Date
03/20/19
Renew 2 Start
1% Control
Start Time
11:49 AM
Renew I
Control
End Time
8:40 AM
Renew 2
Control
Treatment
PH Initial
PH Final
D.O. initial
D.O. Final
Temp. Initial
Temp, Final
6.96
6.93
6.97
6.95
6.92
6.96
7.04
7.01
7.05
7.03
7.00
7.04
8.6
8.5
8.6
8.6
8.5
8.6
8.4
24.4
E8.2
8.4
24.4
8.4
24.4
8.2
24.5
8.4
24A
25.4
25.1
25.2
25.4
25.1
25.2
21
Or and, ism#
Chronic Test Results
Final Control Mortality %
_0_
1 2
3
4
5 6
7
8
9
10 11
12 Mean
% Control3rd Brood
100
22
25
23
24
22
2i
24
25
23
23.0
Control Repro CV
6.48
L
L
L
L
L
L
L
L
L
L
�,;° , ;.•,.<
48 Hour Mortality
1 2
3
4
5 6
7
8
9
10 11
12 Mean
Control 1WC
# Young
Adult
(LNYe Nk�
# Young
25
21
23
21
22
25
22
21
Adult
(L)ive (D)ead
L
L
L
L
tL
ftL
L
L
L
M21
1 2 3 4 5 6 7 8 9 10 Mean
# Young
21
22
2I
22
23
22
20
21
21.5
Adult
(L)ive (D)ead
L
L
L
L
L
L
L
L
:t[j
% Red
6.52
1 2 3 4 5 6 7 8 9 10 Mean
# Young
21
18
19
19
21
20
21
19
20
18[-%A
19.6
Adult
(L)ive (D)ead
L
L
L
L
L
L
L
L
L
L14.8
Rod
1 2 3 4 5 6 7 8 9 10 Mean
# Young
10
11
10
11
12
10
12
9
11
10
Adult
FV.Redd
�Ljive d
L
L
L
L
L
L
L
L
L
L.9
1 7 Z d t R 7 R o In RA...
0 of jQ 0 of 0 10
Si�1'tftean Y N
Final Mortality Significant
2
% or
No Cora.
erodudion Analysis:
Repro. LOEC = 0.75% NOEC = 0.50F/o
lethod:
Dunnett's T-Test
Normal Distrib? yes
Method:
Shapiro Wilkes
Statistic: 0.941
Critical:
0.93
Equal Variances? L
Method:
Bartlett's
Statistic: 5.26
Critical:
13.3
Rank Sum
Critical Sum
Overall Analysis:
Result - PASSLFAIL S
Test LOEC - 1.5 %: NOEC- 1 %
Chronic Value= 1.22 �%
ATT. Environmental Sciences Branch ® Should use highest test concentration or
Div Of Water Qualify highest concentration with D.O. >5.0 m8/I
L N.G DENR
To. 1623 Mall Service Center 1% Reduction from Control Reproduction Mean
Ralelgh, NC 27699-1623
Copy DWQ form AT-3 (8/91) Rev. 11/95
# Young 0 0 I 0 1 0 0 0 o 0 0 0 0
Adult % Red
100
L ive D D DU D D D D D D D

Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 04/10/19
Facility: CORNING, INC. NPDES#: MC0086169 Pipe#: 003 County: CABARRUS
Laboratory Performing Test: R & A LABORATORIES, INC.
rt64973-01
ts: Final Effluent
X
G!amatmra nAr _nratoin Resnonsi e C rue
X
* PASSED: 13.14V Reduction *
Work Order: 64819-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div, of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
�v%j.L L' L %..a.cv.i..e.aaa %i"-&'vuwVA"AiGa
Chronic Pass/Fail Reproduction Toxicity Test
::ONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12
# Young Produced 1125122123121122124125121122124122123
Adult Wive (D)ead JIL IL IL IL IL IL IL IL IL IL IL IL
affluent %-: 1t
PREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12
# Young Produced 1119120118120119121119l22'20'19121120
Adult Wive (D)ead IIL IL IL IL IL IL IL IL IL IL IL IL
Chronic Test Results
Calculated t = 5.799
Tabular t = 2.508
Reduction = 13.14
Mortality
Avg.Reprod.
0.00
22.83
Control
Control
0.00
19.83
Treatment 2
Treatment 2
Control CV
6.147$
PASS FAIL
% control orgs
roducing 3rd
ECheck
One
100�rood
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 04/03/19
Control 6.95 7.02 6.93 7.02 6.97 7.05 Collection (Start) Date
Sample 1: 04/01/19 Sample 2: 04/03/19
Treatment 2 6.95 7.03 6.94 7.04 6.98 7.06 Sample Type/Duration 2nd
1st P/F
s s s Grab Comp. Duration D
t e t e t e I S S
a n a n a n Sample 1 X 24 hrs L A A
r d r d r d U M M
t t t Sample 2 X 24 hrs T P P
lot sample 1st sample 2nd sample
D.O. Hardness (mg/1) 47 .'.:::.. ........
Control 8.6 8.4 8.6 8.3 8.6 8.4
Spec. Cond.(Vmhos) 188 21025 18475
Treatment 2 8.6 8.4 8.6 8.3 8.6 8.4 g ,,,,,,,,,
Chlorine(m /1) .... 0.04 0.03
LC50/Acute Toxicity Test Sample temp. at receipt(°C) e3es's:'t:Eb 3.0 3.2
(Mortality expressed as W, combining replicates)
MMMMMMMMMM
LC50 = g Method of Determination
95%- Con l ence Limits Moving Average Probit _
% -- t Spearman Karber Other
Organism Tested: Ceriodaphnia dubia Duration(hrs):
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)
Note: Please
Concentration Complete This
Section Also
Mortality
start/end start/end
Control
High
Conc.
PH D.O.
LC50 = g Method of Determination
95%- Con l ence Limits Moving Average Probit _
% -- t Spearman Karber Other
Organism Tested: Ceriodaphnia dubia Duration(hrs):
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)
Note: Please
Concentration Complete This
Section Also
Mortality
start/end start/end
Control
High
Conc.
PH D.O.