NC0032719_Email (Quarterly Report 1-2019)_20190130

Strickland, Bev
From: Tawes, David
Sent: Wednesday, January 30, 2019 9:51 AM
To: Tankard, Robert; May, David; Sipe, Randy
Cc: Katie Hackney; Howard, Kevin B; wilkins, sidney h
Subject: Chowan County - SOC Quarterly Report
Attachments: 30-01-2019 SOC Qrtrly Rprt.pdf, Report_NC0032719_Ver_1.0_12_2018.pdf; GW
analyticals.pdf
ZI
Hope everyone is staying warm. The quarterly report, December eDMR, and updated data table is attached.
Please let us know if we need to discuss.
Thank you,
David
David M. Tawes
Chowan Water
1608 Virginia Road
Edenton, NC 27932
Office [phone]
[e-mail]
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties by an authorized
state official.
1

8 NfN
lf
munEn
305 West Freemason Street
P.O. Box 1030
Edenton, 5C 27932
[phone]
January 30, 2019
943 Washington Square Mall
Washington NC 27889
ATT: Mr. Robert Tankard
SUBJECT: County of Chowan Progress Report
Valhalla Water Treatment Plant
NPDES Permit No. NC 0032719
EMC SOC WQ S 16-003
Dear Mr. Tankard,
This is to inform you of the progress that we have been making as of this date to comply with the
SOC deadlines for the Chowan County Water Plant:
1. On October 24, 2018, Chowan County received a comment letter from the NPDES Unit
relative to the previously submitted NPDES Permit Application. On December 6, 2018,
Rivers & Associates, Inc. on behalf of the County responded to the comments. The
following revised or additional items were provided:
a. Revised Schematic Flow Diagram to incorporate flow rates,
b. Letter from the Town of Edenton documenting that their WWTP is unable to accept
the backwash waste flow stream from the Valhalla WTP,
c. Revised EAA to reflect (1) Present Value Cost Analysis modifications, (2)
maximum daily discharge flow rate, and (3) aforementioned letter from Edenton,
d. Revised NPDES Permit Application,
e. Acute Chronic Toxicity sampling procedure utilized by Valhalla ORC.
2. On November 27, 2018, Rivers received an email request from Robin Peele, DWI Drinking
Water Unit, to provide upon receipt all required permits or determinations from USACE
and/or CAMA in order to move the ER/EID process forward.
3. On January 22, 2019, Chowan County approved an Amendment to their Engineering
Agreement with Rivers for design and permitting phase services to include the following:
a. Wetlands Delineation/Mapping,
b. Geotechnical Investigation,
c. Field/Aerial/Hydrographic Surveying,
d. Preliminary Design,
e. Final Design,

NPDES PERMIT NO.: NCO032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed
SAMPLING LOCATION: DOWNSTREAM DISCHARGE NO.: 001
_
E
F
_
E
z
a
z'
00010
00400
00300
00094
00480
70295
Monthly
2 X month
2 X month
Monthly
Monthly
Monthly
Grub
Grab
Grab
Composite
Composite
Composite
TEMP-C
pH
DO
CNDUCTVY
SALINITY
RES/DISS
2400 clock
deg c
su
mg/I
umhos/cm
ppth
mg/1
3
4
-
0930
8.'s
6
7
s
y
11
11
12
13
0930
10
10.2
14
15
16
17
IS
19
0930
8.33
20
21
22
23
24
25
26
27
28
0930
to
10.2
29
30
31
Monthly Average Limit:
Monthly Average:
10
10.2
582
0.28
234
Daily Maximum:
10
8.33
10.2
582
0.28
234
Daily Minimum:
10
8.25
10.2
582
0.28
234
****NoReporting Reason: ENFRUSE—NoFlow-Reuse/Recycle; ENVWTHR—No Visitation— Adverse Weather; NOFLOW—No Flow; HOLIDAY — NoVisitation— Holiday

NPDES PERMIT NO.: NCO032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO
d
q
E
o
U
A
F
E
d
O
d
O
O
U
O
c
ce
Z
50050
00010
00400
50060
C0610
C0530
00300
C0600
C0665
2 X month
Monthly
2 X month
2 X month
Monthly
2 X month
2 X month
Quarterly
Quarterly
Instantaneous
Grab
Grab
Grab
Composite
Composite
Grab
Composite
Composite
FLOW
TEMP-C
pH
CHLORINE
NH3-N-Cone
TSS - Cone
DO
TOTAL N-
TOTAL P - Cone
2400 clock
IHrs
2400 clock
Hrs
Y/R/N
mgd
deg c
su
ug/I
mg/1
mg/I
mg/1
mg/I
mg/I
1
0.012
-
0.086
3
0800
8
Y
0.086
4
0800
8
Y
0.092
-
0800
8
Y
0.006
82s
< 10
6
0800
8
Y
0.092
7
0800
8
Y
0.006
8
0.086
9
0.012
10
0800
8
Y
0.092
11
0800
8
Y
0.086
12
0930
.2i
0800
8
Y
0.012
0.05
-
13
0800
8
Y
0.006
10
10.2
14
0800
8
Y
0.092
15
0.086
16
0.012
17
0800
8
Y
0.092
18
0800
8
Y
0.092
19
0930
.25
0800
8
Y
0.092
S.33
17
-
20
0800
8
Y
0.086
21
0800
8
Y
0.086
22
0.092
23
1
1
1
10.086
24
0800
8
Y
0.086
25
0800
8
Y
0.086
26
0800
8
Y
0.092
27
0800
8
Y
0.012
28
0800
8
Y
0.092
10
10.2
29
0.006
30
0.086
31
1
1
0800
Is
I Y
1
0.086
Monthly Average Limit:
30
Monthly Average:
0.065677
10
1
8.5
0.05
1.35
10.2
Daily Maximum:
0.092
10
8.33
17
0.05
2.7
10.2
Daily Minimum:
0.006
10
8.25
0
0.05
0
10.2
****NoReporting Reason: ENFRUSE-NoFlow-Reuse/Recycle; ENVWTHR=No Visitation- Adverse Weather; NOFLOW=No Flow; HOLIDAY - NoVisitation- Holiday

NPDES PERMIT NO.: NCO032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed
SAMPLING LOCATION: EFFLUENT DISCHARGE NO.: 001 NO DISCHARGE*: NO (Continue)
d
q
E
-
o
U
A
F
E
d
O
E
d
O
e
U
O
eo
a
'z
00094
01055
00480
70295
00070
Monthly
Quarterly
Monthly
Monthly
Monthly
Composite
Composite
Composite
Composite
Grab
CNDUCTVY
MANGNESE
SALINITY
RES/DISS
TURBIDTY
2400 clock
Hrs
2400 clock
Hrs
Y/B/N
umhos/cm
ug/1
ppth
mg/1
nm
3
0800
8
Y
a
0800
8
Y
0800
8
Y
6
0800
8
Y
7
0800
8
Y
a
9
10
0800
8
Y
11
0800
8
Y
12
0930
.2i
0800
8
Y
189
0.29
182
2A
13
0800
8
Y
14
0800
8
Y
15
16
17
0800
8
Y
18
0800
8
Y
19
0930
.25
0800
8
Y
20
0800
8
Y
21
0800
8
Y
22
23
24
0800
8
Y
25
0800
8
Y
26
0800
8
Y
27
0800
8
Y
28
0800
8
Y
29
30
31
1
1
0800
Is
ly
Monthly Average Limit:
Monthly Average:
589
0.29
182
2.9
Daily Maximum:
589
0.29
182
2.9
Daily Minimum:
589
0.29
182
2.9
****NoReporting Reason: ENFRUSE—NoFlow-Reuse/Recycle; ENVWTHR—No Visitation— Adverse Weather; NOFLOW—No Flow; HOLIDAY — NoVisitation— Holiday

NPDES PERMIT NO.: NCO032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed
SAMPLING LOCATION: UPSTREAM DISCHARGE NO.: 001
F
_
E
z
a
z'
00400
2 X month
Grab
PH
2400 clock
Su
3
4
6
7
8
9
11
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Monthly Average Limit:
Monthly Average:
Daily Maximum:
Daily Minimum:
****NoReporting Reason: ENFRUSE—NoFlow-Reuse/Recycle; ENVWTHR—No Visitation— Adverse Weather; NOFLOW—No Flow; HOLIDAY — NoVisitation— Holiday

NPDES PERMIT NO.: NCO032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
COMPLIANCE STATUS: Compliant
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
CONTACT PHONE #: [phone]
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed
SUBMISSION DATE: 01/29/2019
01/29/2019
ORC/Certifier Signature: David Tawes E-Mail:[e-mail] Phone #:[phone] Date
By this signature, I certify that this report is accurate and complete to the best of my knowledge.
The permittee shall report to the Director or the appropriate Regional Office any noncompliance that potentially threatens public health or the environment.
Any information shall be provided orally within 24 hours from the time the permittee became aware of the circumstances. A written submission shall also be
provided within 5 days of the time the permittee becomes aware of the circumstances.
If the facility is noncompliant, please attach a list of corrective actions being taken and a time -table for improvements to be made as required by part II.E.6 of
the NPDES permit.
01/29/2019
Permittee/Submitter Signature:*** Kevin Howard E-Mail:[e-mail] Phone #:[phone] Date
Permittee Address: NC Hwy 32 At NCSR 1222 Edenton NC 27932 Permit Expiration Date: 11/30/2017
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 managed 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 Imes and imprisonment for
knowing violations.
LAB NAME: Environment 1 JLA Edenton
CERTIFIED LAB #: Environment 1, Inc. #10; JLA Edenton, #37785
PERSON(s) COLLECTING SAMPLES: JeffGurganus
CERTIFIED LABORATORIES
PARAMETER CODES
Parameter Code assistance may be obtained by calling the NPDES Unit [phone] or by visiting http://portal.ncdenr.org/web/wq/swp/ps/npdes/forms.
FOOTNOTES
Use only units of measurement designated in the reporting facility's NPDES permit for reporting data.
* No Flow/Discharge From Site: Check this box if no discharge occurs and, as a result, there are no data to be entered for all of the parameters on the DMR
for entire monitoring period.
** ORC on Site?: ORC must visit facility and document visitation of facility as required per 15A NCAC 8G .0204.
*** Signature of Permittee: If signed by other than the permittee, then delegation of the signatory authority must be on file with the state per 15A NCAC 2B
.0506(b)(2)(D).

NPDES PERMIT NO.: NC0032719
FACILITY NAME: Valhalla WTP
OWNER NAME: Chowan County
GRADE: PC-1
eDMR PERIOD: 12-2018 (December 2018)
Outfall 001 - Upstream Comments:
Valhalla Water Treatment Facility has no Upstream!
PERMIT VERSION: 4.0
CLASS: PC-1
ORC: David Michael Tawes
ORC HAS CHANGED: No
VERSION: 1.0
PERMIT STATUS: Expired
COUNTY: Chowan
ORC CERT NUMBER: 985392
STATUS: Processed

Table 3. Summary of Groundwater Sampling Analytical Results
Valhalla WTP Edenton, Chowan County
Well ID
Date Collected
Chloride
TDS
Total Iron
Total
Manganese
Dissolved
Iron
Dissolved
Manganese
Temperature
VC)
DO
(mg/L)
Specific
Conduc-
tivity
(MS/cm)
Conduc-
tivity
(MS/cm)
PH
ORP
(mv)
Turbidity
(NTU)
Surficial
Aquifer
5/26/2015
3,200
1,963
1,929
7/10/2015
3,350
2,650
1,301
11/12/2015
4,800
4,600
6,600
21.9
0.69
13,466
12,669
6.60
30
1/24/2017
4,100
5,900
3,300
140
2,400
15.5
0.20
13,586
10,930
6.23
80
15
MWl
10/2/2017
2,000
3,200
4,600
<200
4,500
23.8
0.30
6,442
6,229
7.1
8
1.07
1/10/2018
5,300
9,200
8,800
11,000
7,700
12,000
17.3
0.75
16,440
13,850
7.29
-30.5
15.4
7/11/2018
2,200
4,000
4,200
2,200
3,100
2,200
22.2
0.33
6,284
5,955
7.15
-138.7
11.3
1/9/2019
4,000
6,900
8,200
4,800
5,800
5,000
17.1
0.84
11,793
9,944
7.11
47.3
12.8
5/26/2015
1,110
484
31
7/10/2015
1,000
446
33
11/12/2015
460
340
29
19.5
0.75
1887
1688
6.69
-26
1/24/2017
1,100
2,200
87
<100
68
11.8
0.28
4274
3197
7.28
-21
34
MW2
10/2/2017
590
3,700
46
<200
34
22.2
0.32
2066
1957
6.8
-0.6
185
1/10/2018
510
1,100
2,400
62
640
47
14.9
0.55
1833
1469
6.78
-22.5
90.7
7/11/2018
780
1,600
2,400
72
280
72
21.5
0.29
2458
2297
6.6
-66.3
65
1/9/2019
340
780
820
51
380
51
15.1
1.5
1 412
1 158
6.75
-4.1
22
5/26/2015
918
1,001
37
7/10/2015
1,200
2,632
64
11/12/2015
1,000
1,700
48
18.4
0.36
3579
3136
6.11
19
1/24/2017
880
2,600
60
640
56
14.9
0.14
3090
2501
6.53
24
18
MW3
10/2/2017
850
2,100
43
830
43
20.2
0.56
2925
2660
6.76
6.7
19.6
1/10/2018
840
1,500
2,000
35
780
34
13.8
0.58
2699
2124
6.76
56.5
18.1
7/11/2018
410
910
2,200
21
590
20
19.8
0.25
1448
1304
6.65
-76.0
21.1
1/9/2019
710
1,3
1 600
35
600
34
15.0
0.77
2,399
19 �44
6.49
52.5
23.6
Shallow Yorktown
Aquifer
1/25/2017
59
13,000
150
<100
56
16.6
0.80
434
384
3.06
305
234
10/2/2017
99
3,700
87
<200
83
17.2
2.07
608
516
7.64
15.2
15.1
MW4
1/10/2018
100
420
2,700
88
550
72
16.1
1.60
626
519
7.73
188.5
48.4
7/11/2018
110
520
2,000
86
370
75
18.2
0.31
606
531
7.42
-65.1
37.6
1/9/2019
130
480
560
76
210
87
16.4
0.23
699
585
7.37
32
7.56
1/25/2017
19
200,000
2,200
160
610
17.4
0.39
380
327
6.70
36
OR
10/2/2017
19
28,000
960
10,000
900
18.6
0.36
334
294
5.95
682
140
MWS
1/10/2018
19
210
28,000
1,200
8,900
880
17.3
0.70
349.6
296.3
6.47
-46.5
82.9
7/12/2018
19
210
17,000
840
3,200
830
18.3
0.27
272
237
5.52
101.0
78
1/9/2019
19
230
26,000
870
1,700
830
17.7
0.23
327.7
2,822
6.21
-15.2
45.2
1/25/2017
17
58,000
860
<100
290
17.7
0.11
503
432
7.18
-20
857
10/2/2017
16
24,000
490
2,900
440
17.9
0.47
397
346
6.72
26
40.8
MW6
1/11/2018
16
210
28,000
520
6,900
440
17.6
0.08
405.1
347.6
7.58
-42.5
15.4
7/12/2018
17
220
23,000
480
4,500
460
18.3
0.15
367
320
7.29
-193.0
24.1
1 10 2019
17
250
22 000
480
5,500
460
17.6
0.21
388.3
333.8
7.18
-0.7
20.1
1/25/2017
1,400
120,000
2,500
18,000
1,800
17.6
0.86
5170
4439
6.62
-1.6
OR
10/3/2017
1,500
130,000
2,300
82,000
2,300
17.2
0.46
4419
3764
6.93
-4.8
9.37
MW7
1/11/2018
1,500
2,300
130,000
2,300
86,000
2,200
17.1
0.33
4231
3594
6.34
54.6
33.5
7/12/2018
1,300
2,600
130,000
2,100
63,000
2,000
17.6
0.18
3966
3409
6.73
-139.0
14.5
1/10/2019
1,200
2,300
110,00
1,900
69,000
1,900
17.0
0.81
3,960
3,360
6.43
77.3
16.6
1/24/2017
1,100
12,000
1,500
1,100
4,100
17.3
0.18
4429
3776
6.97
41
2.0
10/3/2017
290
13,000
720
470
640
17.5
0.25
1173
1003
7.00
0
49
MW8
1/11/2018
41
170
12,000
390
2,000
360
17.2
0.2
335.5
287.1
7.7
-20.3
25.5
7/12/2018
180
560
13,000
500
1,700
500
18.1
0.2
686.0
598.0
7.3
-169.0
13.5
1/10/2019
700
1,300
24,000
1100
6,800
1100
16.9
0.26
2312.0
1939.0
7.2
57.1
11.7
1/25/2017
4,200
510,000
13,000
360,000
10,000 E
18.2
1.44
13,110
11,429
5.92
41
284
10/3/2017
3,300
430,000
11,000
380,000
10,000
18.4
0.35
9,600
8,399
6.17
33
105
MW9
1/11/2018
5,900
9,500 A
440,000
12,000
400,000
12,000
18.0
0.25
17,520
15,175
6.03
52
180
7/12/2018
6,800
10,000
420,000
12,000
420,000
12,000
19.6
0.11
16,950
15,238
6.05
-62
75
1/9/2019
7,000
11,000
410,000
10,000
410,000
11,000
17.7
0.35
18,543
15,950
6.00
10.8
81.4
1/24/2017
15
18,000
300
<100
240
18.1
0.24
301
261
7.07
6.5
98
10/3/2017
27
16,000
270
13,000
260
18.1
0.35
263
228
6.34
18.7
69.4
MW10
1/11/2018
34
180
16,000
300
13,000
280
18.0
1.94
271.4
234.9
6.19
-9.7
21.2
7/12/2018
46
220
17,000
310
8,300
300
20.2
0.32
275
250
6.02
15.5
27.5
1/10/2019
62
220
19,000
360
16,000
350
17.8
0.27
332.5
2,865
6.04
43.7
25.6
1/24/2017
720
140,000
1,800
44,000
1,500
18.2
0.13
2950
2566
6.71
1.6
27
10/3/2017
720
140,000
1,800
88,000
1,900
18.5
0.32
2693
2358
6.75
-35.6
57.2
MW11
1/11/2018
750
1,300
120,000
1,800
71,000
1,800
18.3
0.54
2522
2205
6.89
-15.0
34.9
7/12/2018
740
1,500
130,000
2,000
48,000
1,800
18.6
0.21
2515
2208
6.75
-151.0
15
1/10/2019
760
1,500
120 000
1,800
77 000
1,900
18.1
0.25
2,679
2,318
6.77
-0.4
17.5
1/24/2017
3,000
110,000
2,700
38,000
2,400
17.7
0.21
10,210
8811
6.64
12
61
10/2/2017
3,300
160,000
3,700
97,000
3,500
18.3
0.74
9,810
8556
6.18
8
303
MW12
1/11/2018
3,200
5,400 A
120,000
3,700
93,000
3,400
17.9
2.73
9,849
8519
6.60
25.3
14.7
7/11/2018
3,100
6,000
130,000
3,700
75,000
3,500
19.4
0.15
9,080
8135
6.46
-103.7
9.9
1/9/2019
3,300
5,400
120,000
3,500
97,000
3,500
17.8
0.24
9,452
8,160
6.51
-13.3
22.2
1/24/2017
16
20,000
710
<100
220
17.9
3.61
522
451
7.63
57
185
10/2/2017
18
430
340
< 200
330
18.9
4.1
483
426
7.16
0
12
MW13
1/10/2018
18
290
11,000
420
2,400
360
17.8
1.82
473.7
408.1
7.42
-52.5
32.6
7/11/2018
20
290
11,000
470
3,400
380
18.9
0.21
437
386
7.39
-141.0
46.3
1 9 2019
21
290
5,400
240
1,600
230
18
3.09
450.4
389.5
7.43
-5.0
33.1
5/2/2017
8.4
680
160
<100
150
19.5
0.32
1 570
509
7.10
120
10/3/2017
7.5
1,900
130
<200
130
17.6
0.34
560
481
7.31
-42
5.27
MW14
1/11/2018
7.3
330
21300
140
1,100
120
17.4
3.62
548.8
469.3
7.72
-49.8
14.8
7/12/2018
6.5
310
2,200
120
1,100
120
18.1
0.41
497
432
7.50
-154.0
11.4
1 10 2019
6.9
1 340
1,500
120
710
110
17.5
0.52
510.2
436
7.49
5.6
0.82
Deep Yorktown
Aquifer
1/25/2017
2,400
43,000
7,500
1,000
5,200 E
17.8
0.13
8421
7271
6.78
22
38
10/2/2017
2,400
66,000
6,800
28,000
6,500
17.9
0.34
7444
6442
6.67
14
130
MW2D
1/10/2018
2,300
4,100
53,000
6,000
17,000
6,000
17.0
0.3
7436
6315
7.09
-4.5
73.8
7/12/2018
2,300
4,000
49,000
5,400
10,000
4,900
18.2
0.21
6640
5788
6.93
-144.0
31.4
1/9/2019
2,300
3,800
46,000
4,600
24,000
4,600
17.6
0.78
6,833
5,882
7.00
-26.6
25
1/25/2017
7,500
240,000
2,700
130,000
2,000
18.2
0.13
23,615
20,535
6.49
11
18
10/3/2017
7,300
220,000
2,200
170,000
2,200
18.2
0.32
21,250
18,495
6.63
-35
17.9
MW9D
1/11/2018
7,000
12,000 A
180,000
2,100
150,000
1,900
18.0
0.13
20432
17698
6.94
17.6
8.42
7/12/2018
7,200
11,000
160,000
1,600
110,000
1,700
18.6
0.14
18298
16049
6.77
-137.0
8.5
1/10/2019
6,900
12 000
130,000
1 300
110,000
1 300
17.8
0.17
18 668
16,089
6.8
56.6
6.85
1/24/2017
14
540
170
<100
160
17.4
0.43
447
383
7.68
17
4.0
10/2/2017
14
920
140
<200
130
18.8
0.72
393
348
7.3
15
10.8
MW13D
1/10/2018
14
230
800
130
300
120
17.3
0.85
366.5
311
7.26
-12.5
10.7
7/11/2018
14
210
600
110
290
160
18.4
1.89
308
271
6.76
-7.9
8.7
1/9/2019
13
230
1,100
980
420
89
17.7
1 1.09
348.5
249.5_j
6.93
28.5
10.0
Castle Ha
ne Aquifer
5/2/2017
25
<100
13 <100
13 18.7 0.34
612 540
7.13
171
10/3/2017
160
1,300
110 <200
110 17.9 0.21
1129 977
7.52
-111
1.9
1/11/2018
320
860 1,200
160 690
160 18.0 0.36
1654 1432
7.39
19.2
8.5
MW9DD
3/23/2018
180
NA NA
NA NA
NA
7/12/2018
970
2,000 7,300
450 4,600
450 19.4 0.09
3310 2965
7.27
-142.0
1.3
1 10 2019
280
820 2000
150 1,700
150 17.7 0.66
1 271 1 173
7.33
46.0
1.53
Water Supply
Wells
7/16/2012
82
680
<100
<30
<100
<30
3/23/2018
77
NA
NA
NA
NA
NA
WSW1
7/12/2018
78
630
<100
<0.010
<100
<30
20.5
2.75
1029
937
8.7
37
80.6
1/10/2019
78
630
<100
<0.010
<100
<30
WSW4
5 26 2016
150
9,200
400
<100
120
17.8
6.57
646
558
5.55
182
5/25/2016
1,100
280
310
270
310
18.8
4.57
3580
3164
4.33
204
2/2/2017
1,200
420
360
340
320
10/2/2017
1,000
<100
340
<200
350
18.9
0.6
3074
2717
4.34
161
0.27
WSWS
1/11/2018
1,000
1,500
190
340
<100
340
18.6
0.2
3005
2636
4.15
125.7
1.86
7/12/2018
790
1,400
<100
460
<100
440
18.2
0.27
2500
2163
4.16
272
2
1 10 2019
910
1,500
100
480
450
18.4
0.42
2 830
2,472
4.21
117.7
3.37
201215A NC AC
2L Std. u /L
250 L
500 /L
300 u L
50 u L
NSE u /L
I NSE u /L
Micrograms per liter (ug/L), is equivalent to parts per billion (ppb).
Milligrams per liter (mg/L), is equivalent to parts per million (ppm).
Bold = Concentration exceeds Laboratory Detection Limits
Shaded = Concentration exceeds the 15A NCAC 2L groundwater standard
E = Estimated concentration above the calibration range
OR = over range (1000 NTU)
NTU = Nephelometric Turbidity Unit
A = Residue weight is greater than the methods limit of 200 mg. Analysis could not be repeated due to hold time.
NA = Not analyzed