NC0004626_Activated Carbon Filtration Test Program_20191106

' r
• Nippon Electric Glass
Electric Glass Fiber America, LLC
473 New Jersey Church Road Lexington, NC 27292 [phone]
November 6,2019
RECEIVED
Mr. Sergei Chernikov
North Carolina Department of Environmental Quality NOV 13 2019
NPDES Permitting
1617 Mail Service Center NCI: kQ/uWR/NPDES
Raleigh,NC, 27699-1617
Re: Activated Carbon Filtration Test Program Concluded
NPDES Permit No.NC0004626
Electric Glass Fiber America,LLC Lexington,NC Facility
Dear Mr. Chernikov:
Electric Glass Fiber America(EGFA)operates a fiberglass manufacturing facility in Lexington,NC with
a wastewater treatment plant(WWTP) and effluent discharge authorized by NPDES Permit No.
NC0004626. One of the limitations in the NPDES permit is a criterion for biomonitoring-a quarterly
Chronic Toxicity Pass/Fail Permit Limit. In order to comply with this limitation,EGFA added an
activated carbon filtration system in the WWTP in 1997. Since that time EGFA has consistently been in
compliance with the NPDES permit criteria.
Over the last severalyears there have been significant changes in the EGFAproduction facility. We have
� g Y
come under new management, eliminated our Fluoride discharge and have made significant changes in
our production. We feel these that these changes have eliminated the need for operation of the activated
carbon filtration system and that EGFA can consistently comply with the biomonitoring criteria without
use of the activated carbon filtration system.
In our June 4, 2019 letter,we proposed to conduct monthly biomonitoring of the secondary clarifier
effluent as a test program to demonstrate that the activated carbon filtration is not needed to achieve
• compliance with the biomonitoring criteria. Per communications with Sergei Chernikov on July 2nd, •
NCDWR agreed to the parameters of our test program. This testing was conducted August, September
and October 2019, following the protocol in the"North Carolina Ceriodaphnia Chronic Effluent Bioassay
Procedure."
We have passed these tests,presented in the table below. We have also enclosed copies of the toxicity
reports for your review. We now request that the Department eliminate the requirement for operation of
the activated carbon filtration system from the NPDES permit. However,we will retain the activated
carbon filtration system equipment in our WWTP and agree to reinitiate the system operation if required
in the future.

0.
Nippon Electric Glass
Electric Glass Fiber America, LLC
473 New Jersey Church Road Lexington, NC 27292 [phone]
We would appreciate your written confirmation of this change. Please feel free to call or email me at
336-357-8151 Ext 3317 or [e-mail] if you have any questions or desire any
additional information.
Table 1. 3 Month Trial Results
Aquatic Toxicity Trial - Without Tertitiary Activated Carbon Filtration
NEG A I
Test Start Date Reproduction Control
p 96 Reduction P/F
Reproduction%
8/28/2019 23.67 23.58 -0.35 PASS
9/18/2019 23,75 24.08 1.38 PASS
10/21/2019 23.17 23.5 1.40 PASS
Note' Trial conducted as requested in letter to NCDWR on 6/4/19.No tests experienced any
mortality in any of The organism sets
Sincerely,
Brigette Tinsley
Environmental Manager
Cc: Bob Stein,Fiss Environmental
enclosures

,
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 09/04/19
Facility: ELECTRIC GLASS FIBER AMERICA NPDES#: NC0004626 Pipe#: 001 County: DAVIDSON
Laboratory Performing Test: R & A LABORATORIES, INC.
Comments: Effluent prior to
X g a r Sie o r to in Responsible Charge carbon filter NONCOMPLIANCE
X
Si to f oratory Supervisor * PASSED: -0.35% Reduction *
Work Order: 71277-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = -0.152
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = -0.35
I I % Mortality Avg.Reprod.
# Young Produced 23 23 25 24 22 25 24 22 23 25 25 22
0.00 23.58
Control Control
Adult (L) ive (D)ead L L L L L L L L L L L L
0.00 23.67
Treatment 2 Treatment 2
Effluent %: 48%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
5.258% PASS FAIL
# Young Produced 23 26 23 25 24 25 25 21 24 23 22 23 % control orgs X
producing 3rd
brood Check One
Adult (L)ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 08/28/19
Control 7.35 7.32 7.41 7.50 7.37 7.44 Collection (Start) Date
Sample 1: 08/26/19 Sample 2: 08/28/19
Treatment 2 7.06 7.00 7.02 7.11 7.08 7.15 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
✓ d r d r d U M M
t t t Sample 2 X 24 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 97
I
Control 8.6 8.3 8.6 8.3 8.6 8.4. - -
Spec. Cond. (izmhos) 406 576 559
Treatment 2 8.6 8.4 8.5 8.2 8.6 8.4
Chlorine(mg/1) 0.03 0.03
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 2.9 2.0
(Mortality expressed as %, combining replicates) I
Note: Please
% % % % % % % % % % Concentration Complete This
Section Also
% % % % % % % % % Mortality
start/end start/end
LC50 = % Method of Determination Control
95% Confidence Limits Moving Average - Probit -
% -- % Spearman Karber - Other High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)

.
Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 09/25/19
Facility: ELECTRIC GLASS FIBER AMERICA NPDES#: NC0004626 Pipe#: 001 County: DAVIDSON
Laboratory Performing Test: R & A LABORATORIES, INC.
Comments: Effluent prior to
X
Sig ture of perator in Responsible Charge carbon filter NONCOMPLIANCE
X
S' n u e f Laboratory Supervisor * PASSED: 1.38% Reduction *
Work Order: 72186-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 0.709
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 1.38
% Mortality Avg.Reprod.
# Young Produced 24 23 22 25 25 23 24 26 24 25 24 24
0.00 24.08
Control Control
Adult (L) ive (D)ead L L L L L L L L L L L L
0.00 23.75
Treatment 2 Treatment 2
Effluent %: 48%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
4.499% PASS FAIL
# Young Produced 25 24 22 26 24 23 25 24 23 23 22 24 % control orgs X
producing 3rd
brood Check One
Adult (L) ive (D)ead L L L L L L L L L L L L 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 09/18/19
Control 7.34 7.42 7.33 7.41 7.37 7.44 Collection (Start) Date
Sample 1: 09/16/19 Sample 2: 09/18/19
Treatment 2 7.58 7.66 6.98 7.07 6.99 7.07 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
✓ d r d r d U M M
t t t Sample 2 X 24 hrs T P P
1st sample 1st sample 2nd sample
D.O. Hardness(mg/1) 96
Control 8.5 8.3 8.5 8.2 18.6 8.4
Spec. Cond. (pmhos) 408 629 637
Treatment 2 8.6 8.4 8.6 8.3 8.6 8.4
Chlorine(mg/1) 0.03 0.01
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 3.3 3 .3
(Mortality expressed as %, combining replicates) 1
Note: Please
% % % % % % % % % % Concentration Complete This
Section Also
% % % % % % % % % % Mortality
start/end start/end
LC50 = % Method of Determination Control
95% Confidence Limits Moving Average Probit
% -- % Spearman Karber Other High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)

Effluent Toxicity Report Form - Chronic Pass/Fail and Acute LC50 Date: 10/30/19
Facility: ELECTRIC GLASS FIBER AMERICA NPDES#: NC0004626 Pipe#: 001 County: DAVIDSON
Laborato y Perform' g Test: R & A LABORATORIES, INC.
w-
X Comments: Secondary Claifier
Sign ure Ope o in Responsible Charge Effluent NONCOMPLIANCE
X 73965-01
S na u e Laboratory Supervisor * PASSED: 1.42% Reduction *
Work Order: 73895-01 Environmental Sciences Branch
MAIL ORIGINAL TO: Div. of Environmental Management
N.C. Dept. of EHNR
1621 Mail Service Ctr
Raleigh, North Carolina 27699-1621
North Carolina Ceriodaphnia
Chronic Pass/Fail Reproduction Toxicity Test Chronic Test Results
Calculated t = 0.715
Tabular t = 2.508
CONTROL ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 % Reduction = 1.42
r % Mortality Avg.Reprod.
# Young Produced 23 24 22 25 23 24 23 24 23 22 25 24
0.00 23.50
Control Control
Adult (L) ive (D)ead L L L L L L L L L L L L
0.00 23.17
Treatment 2 Treatment 2
Effluent %: 48%
TREATMENT 2 ORGANISMS 1 2 3 4 5 6 7 8 9 10 11 12 Control CV
4.255% PASS FAIL
# Young Produced 23 24 25 23 22 21 24 22 24 25 22 23 % control orgs X
producing 3rd
brood Check One
Adult (L)ive (D)ead L L L L L L L L L L L L i 100%
1st sample 1st sample 2nd sample Complete This For Either Test
pH Test Start Date: 10/23/19
Control 7.36 7.30 7.34 7.42 7.35 7.44 Collection (Start) Date
Sample 1: 10/21/19 Sample 2: 10/23/19
Treatment 2 7.46 7.44 7.39 7.47 7.41 7.50 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
✓ d r d r d U M M
t t t Sample 2 X 24 hrs T P P
1st sample 1st sample 2nd sample
D.O. I Hardness(mg/1) 97
Control 8.6 8.4 8.5 8.2 8.6 8.4
Spec. Cond. (pmhos) 403 605 577
Treatment 2 8.6 8.4 8.5 8.2 8.6 8.4
Chlorine(mg/1) 0.02 0.03
LC50/Acute Toxicity Test Sample temp. at receipt(°C) 3.4 3.1
(Mortality expressed as %, combining replicates) I
Note: Please
% % % % % % % % % Concentration Complete This
Section Also
% % % % % % % % % % Mortality
start/end start/end
LC50 = % Method of Determination Control
95% Confidence Limits Moving Average _ Probit _ - -
% -- % Spearman Karber _ Other High
Conc.
pH D.O.
Organism Tested: Ceriodaphnia dubia Duration(hrs) :
Copied from DEM form AT-1 (3/87) rev. 11/95 (DUBIA ver. 4.32)