Appendix F - Technical Memorandum - Water Quality Testing

Piedmont Lithium Carolinas, Inc. I North Carolina Mining Permit Application
Appendices
PIEDMONT
LITHIUM
Appendix F: Technical
Memorandum — Water
Quality Testing

n
u
Technical
Memorandum
Water Quality Testing
Piedmont Lithium
Gaston County, North Carolina
March 19, 2020

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Contents
Contents
1 Introduction............................................................................................................................1
2 Methods.................................................................................................................................1
2.1 Groundwater...................................................................................................................1
2.1.1 Groundwater Flow...................................................................................................3
2.1.2 Groundwater Sampling Procedures
........................................................................3
2.2 Surface Water.................................................................................................................3
2.2.1 Flow Measurements................................................................................................3
2.2.2 Surface Water Quality.............................................................................................4
3 Water Quality.........................................................................................................................4
3.1 Groundwater...................................................................................................................4
3.2 Surface Water.................................................................................................................4
4 Conclusions...........................................................................................................................5
4.1 Groundwater...............................................................................................................5
4.2 Surface Water.............................................................................................................5
Figure
Figure 1 — Sample Location Map..................................................................................................2
Tables
Table 1 - Monitoring Well Construction Summary and Groundwater Elevation
Table 2 - Summary of Stream Flow Measurements
Table 3 - Summary of Groundwater Quality Data
Table 4 — Summary of Surface Water Quality Data

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Introduction
1 Introduction
HDR Engineering, Inc. of the Carolinas (HDR) has completed baseline groundwater and surface
water monitoring at the planned Piedmont Lithium, Inc. (PLI) mine site (Site) between August
2018 and February 2020. Subsequent to installation of monitoring and observation wells in
2018, HDR conducted 17 groundwater gauging events, 12 groundwater sampling events, 2
surface water flow monitoring events, and 12 surface water sampling events.
2 Methods
2.1 Groundwater
The groundwater monitoring network consists of five monitoring wells (MW-1 through MW-5),
one aquifer test pumping well (PW-1), and four aquifer test observation wells (OW-1 S, OW-1 D,
OW-2S, and OW-21D). Monitoring wells were installed in June and July 2018 to support monthly
monitoring of groundwater levels and to provide baseline groundwater quality data prior to
operation of the planned mine. The pumping and observation wells were installed in June and
July 2018 to facilitate a planned 72-hour aquifer test for evaluation of hydrogeologic properties
on the northeastern portion of the Site. Well construction details for the wells installed in 2018
are presented in Table 1 Well locations are shown on Figure 1.

LEGEND
o Pumping Well
Monitoring Well
9 Observation Well
9 Surface Water Collection Sites
o Stream Flow Measurements
IP Project Boundary (963 ac.)
© 0 Miles 0.25
•.1 :dl'
i
J#
�.r
sk
.t�
SAMPLE LOCATION MAP
PIEDMONT PIEDMONT LITHIUM
LITHIUM FIGURE 1
TECHNICAL MEMORANDUM: WATER QUALITY TESTING

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Methods
2.1.1 Groundwater Flow
Seventeen groundwater level gauging events were conducted from July 2018 to February 2020.
Depth to water from the top of well casing was recorded using an electronic water level meter.
Depths to water have ranged from 2.15 feet below top of casing (BTOC) in PW-1 (June 2019) to
55.62 feet BTOC in MW-3 (July 2018). Historic groundwater elevations are shown in Table 1.
Based on the data, groundwater generally mimics topography and flows from southwest to
northeast across the Site.
2.1.2 Groundwater Sampling Procedures
Groundwater samples were collected by HDR during 12 sampling events between August 2018
and February 2020. Purging was conducted via low -flow methods and was considered complete
when the water table and field parameters had stabilized in accordance with the targets
specified below. Field measurements were obtained using a calibrated water quality meter.
• Turbidity (10% for values greater than 5 NTU (if three turbidity values are less than 5
NTU, the values are considered stabilized)
• DO (10% for values greater than 0.5 mg/L, if three DO values are less than 0.5 mg/L, the
values are considered stabilized)
• Specific conductance (3%)
• Temperature (3%)
• pH (± 0.1 unit)
• ORP (± 10 millivolts)
The water level meter and pump were decontaminated in the field with a distilled water rinse,
Alconox® wash, and a distilled water rinse, prior to and following sampling at each monitoring
well. Purge water was discharged to the ground surface adjacent to each well.
Samples were transferred under Chain of Custody (COC) procedures to Pace Analytical
Services, LLC (Pace) of Huntersville, North Carolina (NC Certification #37706) for analysis of
constituents, as specified in Section 3.1. Sample handling and custody were performed
according to the EPA Guidance for Field Samplers.
2.2 Surface Water
2.2.1 Flow Measurements
Two surface water flow measurement events occurred during May and June 2019 at 15
locations around the Site (Figure 1). Six flow measurements were taken on larger streams (FM-
1 through FM-6) and nine flow measurements were taken on smaller tributaries (Weir-1 through
Weir-9). Stream flow was measured using Swoffer Model 3000 Current Velocity Flowmeters in
the larger streams and the float method in the smaller tributaries. The Swoffer uses a propeller
driven rotor that produces electronic pulses that are directly proportional to flow velocity. Flow
measurements ranged from 24.15 cubic feet per second (cfs) in FM-1 to 0.065 cfs in Weir-1
(Table 2).

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Water Quality
2.2.2 Surface Water Quality
HDR established seven surface water sampling locations (SITE-1 through SITE-7) along Beaver
Dam Creek and Little Beaver Dam Creek to evaluate surface water quality across the Site. Grab
samples were collected from each surface water sampling location monthly from February 2019
to January 2020. Prior to sample collection, field parameters (including temperature,
conductivity, pH, ORP, and DO) were measured with a water quality meter. Surface water
sampling locations are shown on Figure 1.
3 Water Quality
3.1 Groundwater
Groundwater samples were analyzed for the following suite of inorganic constituents:
• Metals using USEPA Method 6010D
• Alkalinity using Standard Method (SM) 2320B
• Total dissolved solids (TDS) using SM 2540C
• Total Kjeldahl nitrogen using USEPA Method 351.2
• Nitrate and nitrite using USEPA Method 353.2
• Total nitrogen (calculation)
• Chloride, fluoride, sulfate using USEPA Method 300.0
• Cyanide using SM 4500-CN
Following the initial August 2018 sampling event, the samples were analyzed for the RCRA 8
metals and the constituents listed above (Table 3). Concentrations of arsenic, chromium, lead,
manganese and fluoride that exceeded the North Carolina Department of Environmental Quality
(NCDEQ) groundwater quality standards (21- Standards) were reported in MW-2, MW-5, OW-
1 D, OW-2S, and PW-1. Additionally, pH field measurements were observed above and below
the 2L Standard range of 6.5-8.5 standard units (SU) in each of the wells during the monitoring
period. The pH was consistently above 8.5 SU in MW-1, MW-5 and PW-1. Note that the
presence of naturally occurring metals above 2L Standards is common in the Piedmont
Physiographic Provence of North Carolina and does not necessarily constitute groundwater
contamination.
3.2 Surface Water
Surface water samples collected were analyzed for the following:
• Metals using USEPA Method 6010D
• Alkalinity using Standard Method (SM) 2320B
• Total dissolved solids (TDS) using SM 2540C
• Total Kjeldahl nitrogen using USEPA Method 351.2
• Nitrate and nitrite using USEPA Method 353.2

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Conclusions
• Total nitrogen (calculation)
• Chloride, fluoride, sulfate using USEPA Method 300.0
• Cyanide using SM 4500-CN
• Ammonia using USEPA Method 350.1
• Chlorophyll -A using SM 10200-H
• Total suspended solids using SM 2540D
• Phosphorus using USEPA Method 365.1
Six of the twelve surface water sampling events were collected during ambient conditions and
six were collected during non -ambient conditions. Non -ambient conditions are considered when
precipitation in the area is greater than 0.1 inch in the 72 hours prior to sampling. Precipitation
amounts were monitored using the Community Collaborative Rain, Hail, and Snow
(CoCoRaHS) Network. Samples collected were compared to the 15A NCAC 02B Standards and
no exceedances were observed during the sampling events. A summary of the surface water
quality data is presented in Table 4.
4 Conclusions
4.1 Groundwater
The results of monthly groundwater level gauging indicate typical seasonal fluctuations of water
levels across the Site. Further, groundwater elevations mimic topography, which is consistent
with the regolith-fractured crystalline rock aquifer system of the Piedmont Physiographic
Province of North Carolina.
Concentrations of naturally -occurring inorganic constituents were detected in each monitoring
well within the sampling network. The number of constituents detected and the magnitude of
concentrations detected in the samples collected from MW-5 exceeded observations in other
wells sampled and this condition is likely due to natural variability or other conditions (e.g.
anthropogenic source).
4.2 Surface Water
Surface water flow measurements were used to develop a 3-Dimensional flow model to
establish baseline flow across the Site prior to mine operations.
There were neither organic nor inorganic exceedances in the surface water samples collected
from Beaver Dam Creek and Little Beaver Dam Creek.

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Tables
Tables

TABLE 1
SUMMARY OF MONITORING WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Well ID
Northing
(feet)
Easting
(feet)
Well
Diameter
(inches)
Total Dpeth
(ft bgs)
Screened
Interval
(ft bgs)
Top of Casing
Elevation
(feet)
Date of Water Level
Measurement
DTW
(ft bTOC)
GW Elevation
(ft msl)
MW-1
605465.4409
1319945.982
6
110
Open Hole
Interval
(60-110)
762.49
7/16/2018
21.33
741.16
8/7/2018
19.73
742.76
10/4/2018
20.15
742.34
11/16/2018
17.56
744.93
12/21/2018
17.50
744.99
1/25/2019
18.11
744.38
2/27/2019
17.47
745.02
4/24/2019
18.02
744.47
6/24/2019
18.96
743.53
7/22/2019
19.45
743.04
8/20/2019
19.64
742.85
9/23/2019
20.04
742.45
10/28/2019
20.10
742.39
11/18/2019
20.11
742.38
12/17/2019
19.68
742.81
1/27/2020
19.35
743.14
2/25/2020
18.48
744.01
MW-2
605494.2222
1316921.051
6
110
Open Hole
Interval
(60-110)
864.12
7/16/2018
47.99
816.13
8/7/2018
47.88
816.24
10/4/2018
47.37
816.75
11/16/2018
47.02
817.10
12/21/2018
46.25
817.87
1/25/2019
45.29
818.83
2/27/2019
44.03
820.09
4/24/2019
41.85
822.27
6/24/2019
40.44
823.68
7/22/2019
40.19
823.93
8/20/2019
40.10
824.02
9/23/2019
42.03
822.09
10/28/2019
40.84
823.28
11/18/2019
41.01
823.11
12/17/2019
41.22
822.90
1/27/2020
41.30
822.82
2/25/2020
40.80
823.32
MW-3
603244.8572
1315463.542
6
170
Open Hole
Interval
(117-170)
840.39
7/16/2018
55.62
784.77
8/7/2018
55.13
785.26
10/4/2018
54.96
785.43
11/16/2018
54.30
786.09
12/21/2018
52.95
787.44
1/25/2019
51.02
789.37
2/27/2019
49.22
791.17
4/24/2019
46.70
793.69
6/24/2019
46.58
793.81
7/22/2019
47.16
793.23
8/20/2019
47.91
792.48
9/23/2019
48.69
791.70
10/28/2019
49.75
790.64
11/18/2019
50.09
790.30
12/17/2019
50.46
789.93
1/27/2020
50.41
789.98
2/25/2020
49.08
791.31
MW-4
601127.1718
1319231.618
6
153
Open Hole
Interval
(102-153)
884.97
7/16/2018
40.72
844.25
8/7/2018
40.46
844.51
10/4/2018
39.40
845.57
11/16/2018
38.05
846.92
12/21/2018
36.08
848.89
1/25/2019
34.59
850.38
2/27/2019
33.18
851.79
4/24/2019
32.39
852.58
6/24/2019
33.05
851.92
7/22/2019
33.65
851.32
8/20/2019
34.39
850.58
9/23/2019
35.07
849.90
10/28/2019
36.09
848.88
11/18/2019
36.44
848.53
12/17/2019
36.50
848.47
1/27/2020
35.30
849.67
2/25/2020
33.83
851.14

TABLE 2
SUMMARY OF STREAM FLOW MEASUREMENTS
PIEDMONT LITHIUM, INC.
GASTON, NORTH CAROLINA
Location
ID
Date
Flow (cfs)
Flow (gpm)
FM-1
5/13/2019
24.15
10839.2
6/11/2019
20.40
9156.1
FM-2
5/13/2019
20.95
9403.0
6/11/2019
20.60
9245.9
FM-3
5/13/2019
8.00
3590.6
6/11/2019
8.40
3770.2
FM-4
5/13/2019
12.15
5453.3
6/11/2019
12.05
5408.4
FM-5
5/15/2019
0.35
157.1
6/12/2019
0.30
134.6
FM-6
5/15/2019
9.05
4061.9
6/12/2019
8.65
3882.4
Weir-1
5/15/2019
0.065
29.2
6/12/2019
0.34
152.9
Weir-2
5/15/2019
0.60
269.3
6/13/2019
0.53
238.3
Weir-3
5/15/2019
NM
>11*
6/12/2019
0.088
39.7
Weir-4
5/15/2019
0.42
188.5
6/13/2019
0.15
68.0
Weir-5
5/15/2019
0.25
112.2
6/13/2019
0.15
66.1
Weir-6
5/15/2019
0.82
365.8
6/13/2019
0.37
166.1
Weir-7
5/15/2019
0.10
44.9
6/12/2019
0.097
43.6
Weir-8
5/15/2019
0.03
13.5
6/13/2019
0.04
18.9
Weir-9
5/15/2019
0.07
31.4
6/13/2019
0.10
45.2
Notes:
cfs - cubic feet per second
gpm - gallons per minute
NM - not measured
* A temporary weir was used at this location

TABLE 3
SUMMARY OF GROUNDWATER QUALITY DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Field Measurements
Alkalinity
Nitrogen
Location
Date
Turbidity
(NTU)
DO
(mg/L)
pH (SU)
Specific
Conductivity (Ps/cm)
Temperature
(°C)
Arsenic
(ug/L)
Barium
(ug/L)
Cadmium
(ug/L)
Chromium
(ug/L)
Lead
(ug/L)
Lithium
(ug/L)
Mercury
(ug/L)
Manganese
(ug/L)
Selenium
(ug/L)
Silver
(ug/L)
Bicarbonate
( (mg L)
Carbonate
( (mg L)
Total
(mg L)
Total
�mgg)
Total
Keldahl
Nitrogen
Nitrogen,
N (mg/L)
Total Dissolved
Solids (mg/L)
Chloride
(mg/L)
Fluoride
(mg/L)
Sulfate
(mg/L)
Cyanide
(mg/L)
8/10/2018
4.91
5.97
11.73
675.0
17.0
<10.0
16.6
<1.0
6.1
<5.0
NS
NS
NS
<10.0
<5.0
<5.0
140
160
<0.52
<0.50
0.17
233
3.3
0.32
12.9
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
19.1
<1.0
<5.0
<5.0
84.2
NS
<5.0
<10.0
<5.0
<5.0
88.0
168
<0.52
<0.50
0.25
224
2.0
0.18
7.3
<0.0080
4/24/2019
1.27
3.36
11.75
737.0
16.6
<10.0
18.7
<1.0
<5.0
<5.0
78.2
<0.20
<5.0
<10.0
<5.0
<5.0
51.0
178
0.87
0.62
0.25
256
1.9
0.18
6.8
<0.0080
6/24/2019
1.66
4.63
11.46
636.0
17.1
<10.0
19.50
<1.0
<5.0
<5.0
73.0
<0.20
<5.0
<10.0
<5.0
<5.0
58.70
161.00
<0.52
<0.50
0.27
212.00
2.00
0.16
6.90
<0.0080
7/22/2019
1.45
4.78
11.68
624.0
16.8
<10.0
17.0
<1.0
<5.0
<5.0
71.4
NS
<5.0
<10.0
<5.0
<5.0
67.7
146
<0.52
<0.50
0.27
181
2.0
0.17
6.7
<0.0080
8/23/2019
20.4
3.85
11.39
634.0
17.8
<10.0
20.1
<1.0
<5.0
<5.0
81.8
<0.20
14.1
<10.0
<5.0
<5.0
71.3
154
0.58
<0.50
0.29
195
2.2
0.27
7.5
<0.0080
MW-1
9/24/2019
1.5
3.71
11.26
581.4
16.6
<10.0
16.8
<1.0
<5.0
<5.0
80.3
<0.20
<5.0
<10.0
<5.0
<5.0
80.3
153
<0.52
<0.50
0.30
186
2.1
0.17
6.6
<0.0080
10/28/2019
2.06
4.21
11.56
597.7
15.1
<10.0
15.4
<1.0
<5.0
<5.0
81.2
<0.20
<5.0
<10.0
<5.0
<5.0
40.1
141
0.52
<0.50
0.31
214
1.9
0.26
7.2
<0.0080
11/18/2019
1.01
4.19
11.54
450.7
14.7
<50.0'
13.1
<5.0*
<25.0'
<25.0`
91.6
<0.20
<25.0*
<50.0
<25.0*
<5.0
64.9
108
0.60
<0.50
0.40
142
2.0
0.20
5.2
<0.0080
12/17/2019
0.40
5.02
10.41
124.6
15.0
<10.0
7.2
<1.0
<5.0
<5.0
97.1
<0.20
<5.0
<10.0
<5.0
<5.0
39.3
40.6
0.53
<0.50
0.46
71.0
2.0
0.11
2.9
<0.0080
1/27/2020
0.60
5.58
10.44
140.4
14.7
<10.0
9.1
<1.0
<5.0
<5.0
97.0
<0.20
5.0
<10.0
<5.0
16.5
19.3
35.8
0.69
<0.50
0.51
76.0
2.0
<0.10
2.2
<0.0080
2/25/2020
1.47
2.56
11.57
500.7
14.7
<10.0
9.1
<1.0
<5.0
<5.0
76.6
<0.20
<5.0
<10.0
<5.0
<5.0
64.6
120
<0.52
<0.50
0.33
140
2.2
0.36
7.1
<0.0080
8/9/2018
8.20
0.95
7.80
184.6
17.5
<10.0
<5.0
<1.0
<5.0
<5.0
NS
NS
NS
<10.0
<5.0
79.1
<5.0
79.1
1.30
<0.50
0.91
135
2.5
<0.10
8.2
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
1 <5.0
<1.0
<5.0
<5.0
1 180.0
NS
33.6
<10.0
<5.0
1 95.4
<5.0
95.4
1.40
<0.50
1.10
139
2.3
<0.10
5.4
<0.0080
4/24/2019
4.79
0.15
7.98
203.9
16.6
<10.0
<5.0
<1.0
<5.0
<5.0
167
<0.20
31.1
<10.0
<5.0
97.3
<5.0
97.3
1.4
<0.50
1 1.1
165
2.3
<0.10
5.3
<0.0080
6/24/2019
1.24
1.61
7.37
184.2
18.6
<10.0
<5.0
<1.0
12.80
<5.0
99.3
<0.20
21.4
<10.0
<5.0
86.50
<5.0
86.50
1.90
<0.50
1.70
145.00
2.50
<0.10
3.30
<0.0080
7/22/2019
1.09
0.31
8.10
203.0
16.7
<10.0
<5.0
<1.0
<5.0
<5.0
129
NS
21.7
<10.0
<5.0
98.2
<5.0
98.2
1.3
<0.50
1.2
133
2.4
<0.10
4.9
<0.0080
MW-2
8/22/2019
2.79
0.29
7.58
214.0
16.8
<10.0
<5.0
<1.0
11.4
<5.0
145
<0.20
19.4
<10.0
<5.0
106
<5.0
106
1.4
<0.50
1.3
163
2.6
<0.10
5.7
<0.0080
9/24/2019
0.64
4.18
5.87
138.2
15.9
<10.0
5.2
<1.0
1 <5.0
<5.0
70.4
<0.20
17.6
1 <10.0
<5.0
57.1
<5.0
57.1
2.0
<0.50
2.0
103
2.5
<0.10
1.5
<0.0080
10/28/2019
0.63
6.30
7.07
189.7
16.4
<10.0
1 <5.0
<1.0
<5.0
<5.0
93.6
1 <0.20
21.4
<10.0
<5.0
1 79.0
<5.0
1 79.0
2.2
<0.50
2.0
1 146
2.4
<0.10
3.1
<0.0080
11/18/2019
0.46
4.02
1 6.75
147.0
15.9
<10.0
<5.0
<1.0
<5.0
<5.0
82.9
<0.20
12.7
<10.0
<5.0
57.2
<5.0
57.2
2.3
<0.50
2.1
113
2.6
<0.10
1.9
<0.0080
12/17/2019
0.63
5.69
6.30
112.8
16.0
<10.0
6.8
<1.0
<5.0
<5.0
72.0
<0.20
12.6
<10.0
<5.0
44.0
<5.0
44.0
2.3
<0.50
2.2
74.0
2.6
<0.10
1.1
<0.0080
1/28/2020
1.72
0.85
7.75
213.2
15.5
<10.0
<5.0
<1.0
<5.0
<5.0
141
<0.20
19.2
<10.0
<5.0
106
<5.0
106
1.6
<0.50
1.5
129
2.4
<0.10
4.8
<0.0080
2/25/2020
0.32
3.24
7.00
171.3
15.4
<10.0
<5.0
<1.0
<5.0
<5.0
82.8
<0.20
17.8
<10.0
<5.0
74.1
<5.0
74.1
2.0
<0.50
1.9
98.0
2.6
<0.10
2.5
1 <0.0080
8/9/2018
8.70
5.59
9.06
106.9
17.7
<10.0
<5.0
<1.0
1 <5.0
<5.0
NS
NS
NS
<10.0
<5.0
46.1
<5.0
46.1
0.88
<0.50
0.65
94.0
1.3
1 <0.10
2.9
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
<5.0
<1.0
<5.0
<5.0
185.0
1 NS
12.5
<10.0
<5.0
1 47.9
<5.0
1 47.9
0.90
<0.50
0.76
85.0
1.3
<0.10
1.5
<0.0080
4/24/2019
3.21
6.39
1 8.77
102.0
16.1
<10.0
5.2
<1.0
<5.0
<5.0
185
<0.20
5.5
<10.0
<5.0
46.4
<5.0
48.2
0.99
<0.50
0.70
112
1.3
<0.10
1.6
<0.0080
6/24/2019
1.60
5.35
8.97
103.4
18.1
<10.0
9.70
<1.0
<5.0
<5.0
172
<0.20
<5.0
<10.0
<5.0
45.20
<5.0
48.90
0.89
<0.50
0.72
84.00
1.30
<0.10
1.60
<0.0080
7/23/2019
1.43
6.14
7.86
97.1
18.1
<10.0
<5.0
<1.0
<5.0
<5.0
155
NS
6.0
<10.0
<5.0
43.6
<5.0
43.6
0.9
<0.50
0.72
50.0
1.4
<0.50
1.5
<0.0080
8/23/2019
1.08
5.98
7.66
101.8
16.5
<10.0
<5.0
<1.0
<5.0
<5.0
184
<0.20
<5.0
<10.0
<5.0
48.8
<5.0
48.8
0.90
<0.50
0.72
83.0
1.5
<0.10
2.1
<0.0080
MW-3
9/23/2019
1.75
6.87
6.86
96.6
16.5
<10.0
<5.0
<1.0
1 <5.0
<5.0
179
<0.20
<5.0
1 <10.0
<5.0
47.5
<5.0
47.5
0.86
1 <0.50
0.82
83.0
1.5
<0.10
1.5
<0.0080
10/28/2019
1.44
7.10
8.03
105.1
16.4
<10.0
<5.0
<1.0
<5.0
<5.0
186
1 <0.20
<5.0
<10.0
<5.0
1 46.0
<5.0
46.0
0.96
<0.50
0.82
98.0
1.3
<0.10
1.4
<0.0080
11/20/2019
0.90
5.71
1 7.77
104.4
14.5
<10.0
<5.0
<1.0
<5.0
<5.0
204
<0.20
5.6
<10.0
<5.0
45.0
<5.0
45.0
1.00
<0.50
0.87
1 87.0
1.5
<0.10
1.5
<0.0080
12/17/2019
2.74
5.28
8.35
111.4
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
194
<0.20
<5.0
<10.0
<5.0
53.5
<5.0
53.5
0.81
<0.50
0.81
82.0
1.5
<0.10
1.5
<0.0080
1/27/2020
3.01
6.79
7.86
102.1
14.6
<10.0
<5.0
<1.0
<5.0
<5.0
199
<0.20
<5.0
<10.0
<5.0
50.4
<5.0
50.4
1.0
<0.50
0.81
78.0
1.4
<0.10
1 1.4
<0.0080
2/27/2020
4.69
5.81
8.20
108.8
15.4
<10.0
<5.0
<1.0
<5.0
<5.0
186
<0.20
<5.0
<10.0
<5.0
53.6
<5.0
53.6
0.78
<0.50
0.75
65.0
1.5
<0.10
1.4
<0.0080
8/7/2018
13.10
7.11
9.20
120.5
18.4
<10.0
5.2
<1.0
25.7
<5.0
NS
NS
NS
<10.0
<5.0
44.2
<5.0
49.1
1.2
<0.50
1.10
93.0
1.0
1.1
4.1
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
5.4
<1.0
<5.0
<5.0
222
NS
23.4
<10.0
<5.0
39.6
11.7
51.3
1.4
<0.50
1.2
93.0
<1.0
<0.10
1.3
<0.0080
4/25/2019
2.23
6.15
9.08
113.0
16.5
<10.0
<5.0
<1.0
<5.0
<5.0
228
<0.20
11.9
<10.0
<5.0
40.3
15.0
55.2
1.6
<0.50
1.2
127
<1.0
<0.10
1.1
<0.0080
6/25/2019
1.61
5.75
8.52
105.4
17.5
<10.0
5.50
<1.0
<5.0
<5.0
190
<0.20
11.2
<10.0
<5.0
49.70
<5.0
49.70
1.30
<0.50
1.20
105.00
<1.0
<0.10
1.00
<0.0080
7/24/2019
1.22
5.64
8.25
98.2
18.8
<10.0
5.5
<1.0
<5.0
<5.0
159
NS
16.2
<10.0
<5.0
46.1
<5.0
46.1
1.4
<0.50
1.1
58.0
1.0
<0.10
1.0
<0.0080
MW-4
8/23/2019
2.48
6.61
7.57
98.3
17.5
<10.0
6.4
<1.0
<5.0
<5.0
172
<0.20
12.0
<10.0
1 <5.0
46.1
<5.0
1 46.1
1.3
<0.50
1.1
86.0
<1.0
I <0.10
1.3
1 <0.0080
9/24/2019
3.03
6.36
6.99
93.4
16.4
<10.0
5.3
<1.0
<5.0
<5.0
161
<0.20
19.6
<10.0
<5.0
46.2
<5.0
46.2
1.2
<0.50
1.1
89.0
<1.0
<0.10
<1.0
<0.0080
10/30/2019
0.87
7.57
7.58
96.7
16.5
<10.0
1 5.6
<1.0
<5.0
<5.0
163
1 <0.20
10
<10.0
<5.0
41.4
<5.0
41.4
1.4
1 <0.50
1.2
1 79.0
<1.0
<0.10
<1.0
<0.0080
11/19/2019
1.74
6.08
1 7.82
103.2
15.7
<10.0
<5.0
<1.0
<5.0
<5.0
187
<0.20
17.4
<10.0
<5.0
44.0
<5.0
44.0
1.3
0
1.2
94.0
<1.0
<0.10
1.2
<0.0080
12/19/2019
1.81
5.98
7.16
91.5
14.6
<10.0
<5.0
<1.0
23.2
<5.0
158
<0.20
8.5
<10.0
<5.0
41.0
<5.0
41.0
1.3
0
1.2
83.0
<1.0
<0.10
<1.0
<0.0080
1/29/2020
0.58
7.29
7.55
91.3
15.6
<10.0
8.8
<1.0
<5.0
<5.0
155
<0.20
<5.0
<10.0
<5.0
43.6
<5.0
43.6
1.3
0
E10
1.2
68.0
<1.0
<0.10
<1.0
<0.0080
2/27/2020
1.90
6.18
7.12
91.9
16.6
<10.0
6.8
<1.0
<5.0
<5.0
145
<0.20
5.9
<10.0
<5.0
41.4
<5.0
41.4
1.2
0
1.1
55.0
<1.0
<0.10
<1.0
<0.0080

TABLE 3
SUMMARY OF GROUNDWATER QUALITY DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Field Measurements
Alkalinity
Nitrogen
Location
Date
Turbidity
(NTU)
DO
(mg/L)
pH (SU)
Specific
Conductivity (Ps/cm)
Temperature
(°C)
Arsenic
(ug/L)
Barium
(ug/L)
Cadmium
(ug/L)
Chromium
(ug/L)
Lead
(ug/L)
Lithium
(ug/L)
Mercury
(ug/L)
Manganese
(ug/L)
Selenium
(ug/L)
Silver
(ug/L)
Bicarbonate
((mg L)
Carbonate
((mg L)
Total
(mg L)
Total
�mgg)
Total
Keldahl
Nitrogen
Nitrogen,
N (mg/L)
Total Dissolved
Solids (mg/L)
Chloride
(mg/L)
Fluoride
(mg/L)
Sulfate
(mg/L)
Cyanide
(mg/L)
8/8/2018
14.7
4.04
11.97
169.7
20.4
221
485
1.3
328
39.9
NS
NS
NS
26.7
<5.0
1530
1800
3330
<0.52
<0.50
0.081
520
2.4
0.28
19.4
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
14.6
<1.0
6.2
<5.0
70.9
NS
<5.0
<10.0
<5.0
<5.0
88.0
193
<0.52
<0.50
<0.040
271
1.8
0.15
13.5
<0.0080
4/25/2019
2.93
3.11
11.19
276.4
19.3
<10.0
12.9
<1.0
<5.0
<5.0
151
<0.20
<5.0
<10.0
<5.0
<5.0
35.8
70.0
<0.52
<0.50
0.091
108
<1.0
<0.10
2.1
<0.0080
6/25/2019
4.39
5.83
10.99
228.0
18.1
10.40
13.60
<1.0
<5.0
<5.0
147
<0.20
<5.0
<10.0
<5.0
12.30
86.30
98.60
<0.52
<0.50
0.089
80.00
<1.0
0.10
2.00
<0.0080
7/24/2019
3.22
3.22
10.97
183.7
18.2
<10.0
9.7
<1.0
<5.0
<5.0
130
NS
<5.0
<10.0
<5.0
<5.0
48.9
54.0
<0.52
<0.50
0.088
56.0
<1.0
<0.10
1.9
<0.0080
MW-5
8/21/2019
6.18
2.75
10.72
185.5
20.5
<10.0
9.7
<1.0
<5.0
<5.0
143
<0.20
6.0
<10.0
<5.0
<5.0
47.0
50.3
<0.52
<0.50
0.077
74.0
1.2
0.13
3.5
<0.0080
9/24/2019
17.40
6.81
10.73
184.3
18.5
<10.0
9.6
<1.0
<5.0
<5.0
146
<0.20
8.2
<10.0
<5.0
17.1
54.0
71.2
<0.52
<0.50
0.087
79.0
1.1
<0.10
3.0
<0.0080
10/29/2019
4.47
3.40
10.71
141.4
17.5
<10.0
8.2
<1.0
1 <5.0
<5.0
158
<0.20
1 <5.0
<10.0
<5.0
<5.0
24.4
40.1
<0.52
<0.50
0.087
63.0
<1.0
<0.10
2.0
<0.0080
11/20/2019
8.23
0.23
11.58
515.5
16.9
<10.0
6.7
<1.0
<5.0
<5.0
80.1
<0.20
<5.0
<10.0
<5.0
<5.0
62.5
125
<0.52
<0.50
<0.040
168
1.6
0.20
1 10.4
<0.0080
12/18/2019
7.19
2.71
10.08
88.9
15.0
14.3
8.2
<1.0
<5.0
<5.0
169
<0.20
7.5
<10.0
<5.0
42.5
11.9
54.4
<0.52
<0.50
0.078
44.0
1.1
0.10
2.3
<0.0080
1/28/2020
4.77
2.85
10.86
169.1
15.6
<10.0
9.6
<1.0
<5.0
<5.0
158
<0.20
7.2
<10.0
<5.0
<5.0
48.1
50.3
<0.52
<0.50
0.068
64.0
1.1
<0.10
2.9
<0.0080
2/26/2020
3.58
5.65
9.66
82.9
15.1
13.9
<5.0
<1.0
<5.0
<5.0
156
<0.20
<5.0
<10.0
<5.0
30.1
6.7
36.9
<0.52
<0.50
0.069
44.0
1.1
<0.10
2.8
<0.0080
8/9/2018
12.3
6.70
6.78
124.6
15.9
<10.0
<5.0
<1.0
<5.0
<5.0
NS
NS
NS
<10.0
<5.0
64.5
<5.0
64.5
<0.52
<0.50
0.16
103
<1.0
<0.10
<1.0
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
<5.0
1 <1.0
<5.0
<5.0
108
NS
12.8
<10.0
<5.0
69.6
<5.0
69.6
<0.52
<0.50
0.19
103
<1.0
<0.10
<1.0
<0.0080
4/26/2019
5.71
6.40
6.92
127.9
14.9
<10.0
<5.0
<1.0
<5.0
<5.0
109
<0.20
34.9
<10.0
<5.0
73.2
<5.0
73.2
<0.52
<0.50
0.17
157
<1.0
<0.10
I <1.0
<0.0080
6/26/2019
9.63
5.52
7.01
128.4
15.7
<10.0
<5.0
<1.0
<5.0
<5.0
97.8
<0.20
14.9
<10.0
<5.0
69.60
<5.0
69.60
<0.52
<0.50
0.22
104.00
<1.0
<0.10
<1.0
<0.0080
7/23/2019
5.15
6.37
6.92
122.4
15.9
<10.0
<5.0
<1.0
<5.0
<5.0
85.8
NS
23.2
<10.0
<5.0
64.8
<5.0
64.8
<0.52
<0.50
0.16
104
<1.0
<0.10
<1.0
1 <0.0080
ow
8/22/2019
8.49
5.10
6.77
126.6
17.3
<10.0
<5.0
<1.0
<5.0
<5.0
98.0
<0.20
1 30.8
<10.0
<5.0
69.5
<5.0
69.5
<0.52
<0.50
0.16
100
<1.0
0.12
<1.0
<0.0080
-is
9/26/2019
9.73
6.32
6.06
119.0
16.2
<10.0
<5.0
<1.0
1 <5.0
<5.0
95.5
<0.20
32.0
<10.0
<5.0
68.3
<5.0
68.3
<0.52
<0.50
0.16
100
1.1
<0.10
<1.0
<0.0080
10/30/2019
7.24
6.77
6.92
125.0
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
103
<0.20
19.1
<10.0
<5.0
62.7
<5.0
62.7
<0.52
<0.50
0.17
106
<1.0
<0.10
<1.0
<0.0080
11/21/2019
2.06
6.00
6.84
127.6
15.2
<10.0
<5.0
<1.0
<5.0
<5.0
106
<0.20
<5.0
<10.0
<5.0
63.6
<5.0
63.6
<0.52
<0.50
0.19
1 109
<1.0
<0.10
<1.0
<0.0080
12/19/2019
9.98
5.30
6.85
125.6
13.8
<10.0
<5.0
<1.0
<5.0
<5.0
105
<0.20
31.4
<10.0
<5.0
67.4
<5.0
67.4
<0.52
<0.50
0.17
115
<1.0
<0.10
<1.0
<0.0080
1/28/2020
12.80
6.40
6.80
120.1
13.9
<10.0
<5.0
<1.0
<5.0
<5.0
112
1 0.33
23.0
<10.0
<5.0
65.2
<5.0
65.2
<0.52
<0.50
0.16
93.0
<1.0
<0.10
I <1.0
<0.0080
2/26/2020
4.29
6.75
6.69
133.4
13.8
<10.0
<5.0
<1.0
<5.0
<5.0
98.4
<0.20
5.9
<10.0
<5.0
71.9
<5.0
71.9
<0.52
<0.50
0.16
75.0
<1.0
<0.10
<1.0
<0.0080
8/7/2018
13.20
5.94
7.21
187.7
17.6
<10.0
5.5
<1.0
1 6.9
<5.0
NS
NS
NS
<10.0
1 <5.0
93.8
<5.0
93.8
<0.52
1 <0.50
0.26
132
1.7
0.16
1.2
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
<5.0
<1.0
<5.0
<5.0
184
NS
63.9
<10.0
<5.0
100
<5.0
100
<0.52
<0.50
0.31
137
1.6
0.12
1.1
<0.0080
4/26/2019
1.17
4.93
6.85
165.4
14.4
<10.0
<5.0
<1.0
<5.0
<5.0
161
<0.20
<5.0
<10.0
<5.0
92.6
<5.0
92.6
1.0
0.75
0.27
1 155
1.5
<0.10
<1.0
<0.0080
6/26/2019
3.69
4.08
6.93
181.3
16.4
<10.0
<5.0
<1.0
<5.0
<5.0
163
<0.20
49.3
<10.0
<5.0
100.00
<5.0
100.00
<0.52
<0.50
0.29
117.00
1.60
<0.10
1.00
<0.0080
7/23/2019
6.37
4.58
6.93
176.8
16.8
<10.0
<5.0
<1.0
<5.0
<5.0
145
1 NS
50.1
<10.0
<5.0
93.6
<5.0
93.6
<0.52
<0.50
0.27
101
1.7
<0.10
1 1.0
<0.0080
8/22/2019
2.68
4.48
6.84
172.3
16.2
<10.0
<5.0
<1.0
<5.0
<5.0
154
<0.20
6.9
<10.0
<5.0
90.4
<5.0
90.4
<0.52
<0.50
0.27
122
1.9
<0.10
1.0
<0.0080
OW-1 D
9/25/2019
4.36
4.22
6.19
167.5
15.9
<10.0
1 <5.0
<1.0
1 <5.0
<5.0
158
<0.20
22.0
1 <10.0
<5.0
94.7
<5.0
94.7
<0.52
1 <0.50
0.31
130
1.8
<0.10
<1.0
<0.0080
10/30/2019
5.69
5.34
6.93
171.6
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
166
<0.20
8.0
<10.0
<5.0
87.2
<5.0
1 87.2
<0.52
<0.50
0.30
120
1.7
<0.10
<1.0
<0.0080
11/21/2019
2.18
2.98
6.95
180.1
15.4
<10.0
<5.0
<1.0
<5.0
5.5
163
<0.20
5.1
<10.0
<5.0
94.2
<5.0
94.2
<0.52
<0.50
0.30
1 132
1.7
<0.10
<1.0
1 <0.0080
12/19/2019
2.31
4.50
6.87
172.3
14.2
<10.0
<5.0
<1.0
<5.0
<5.0
172
<0.20
9.7
<10.0
<5.0
92.3
<5.0
92.3
<0.52
<0.50
0.30
130
1.8
<0.10
<1.0
<0.0080
1/29/2020
13.0
4.43
7.03
162.9
12.0
<10.0
<5.0
<1.0
<5.0
30.1
1 162
<0.20
6.2
<10.0
<5.0
90.7
<5.0
90.7
<0.52
<0.50
0.27
92.0
1.6
<0.10
<1.0
<0.0080
2/27/2020
8.10
4.12
6.75
170.1
12.7
<10.0
<5.0
<1.0
<5.0
22.5
152
<0.20
5.6
<10.0
<5.0
90.4
<5.0
90.4
<0.52
<0.50
0.29
101
1.8
<0.10
<1.0
<0.0080
8/8/2018
49.4
5.68
6.42
113.8
18.9
<10.0
9.7
<1.0
<5.0
<5.0
NS
NS
NS
<10.0
<5.0
56.1
<5.0
56.1
<0.52
<0.50
0.094
123
1.3
<0.10
<1.0
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
<5.0
<1.0
<5.0
<5.0
36.7
NS
8.1
<10.0
<5.0
61.1
<5.0
61.1
<0.52
<0.50
0.097
114
<1.0
<0.10
<1.0
<0.0080
4/26/2019
9.26
5.18
6.54
113.8
16.0
<10.0
5.8
<1.0
<5.0
<5.0
38.3
<0.20
19.3
<10.0
<5.0
61.9
<5.0
61.9
0.72
0.63
0.092
139
1.0
<0.10
<1.0
<0.0080
6/25/2019
6.34
4.92
6.70
114.8
18.3
<10.0
9.70
<1.0
<5.0
<5.0
37.2
<0.20
37.9
<10.0
<5.0
62.30
<5.0
62.30
<0.52
<0.50
0.091
99.00
1.30
0.10
<1.0
<0.0080
7/24/2019
28.30
5.47
6.73
114.0
17.7
<10.0
5.1
<1.0
<5.0
<5.0
30.5
NS
17.5
<10.0
<5.0
58.3
<5.0
58.3
<0.52
<0.50
0.082
84.0
1.0
<0.10
<1.0
<0.0080
OW-2S
8/21/2019
45.0
4.93
6.45
116.1
20.5
<10.0
14.1
<1.0
<5.0
<5.0
40.4
<0.20
65.5
<10.0
<5.0
58.3
<5.0
58.3
<0.52
<0.50
<0.087
107
1.2
0.12
<1.0
<0.0080
9/25/2019
9.02
4.65
6.12
11.2
18.0
<10.0
<5.0
<1.0
<5.0
<5.0
33.7
<0.20
15.4
<10.0
<5.0
62.0
<5.0
62.0
<0.52
<0.50
0.087
106
1.1
<0.10
<1.0
<0.0080
10/29/2019
9.86
6.38
6.56
114.8
18.3
<10.0
<5.0
<1.0
<5.0
<5.0
37.1
<0.20
11.1
<10.0
<5.0
55.9
<5.0
55.9
<0.52
<0.50
0.100
99.0
<1.0
<0.10
<1.0
<0.0080
11/21/2019
64.6
7.41
6.67
119.9
18.6
<10.0
7.8
<1.0
<5.0
<5.0
44.7
<0.20
38.1
<10.0
<5.0
62.8
<5.0
62.8
<0.52
<0.50
0.094
118
1.0
<0.10
<1.0
<0.0080
12/18/2019
9.95
4.87
6.47
115.8
16.9
<10.0
8.7
<1.0
<5.0
<5.0
43.0
<0.20
51.2
<10.0
<5.0
60.3
<5.0
60.3
<0.52
<0.50
0.073
116
1.1
<0.10
<1.0
<0.0080
1/28/2020
7.52
5.82
6.65
109.3
16.0
<10.0
<5.0
<1.0
<5.0
<5.0
38.8
<0.20
10.3
<10.0
<5.0
58.7
<5.0
58.7
<0.52
<0.50
0.089
91.0
1.0
<0.10
<1.0
<0.0080
2/26/2020
8.30
5.03
6.21
115.0
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
38.7
<0.20
12.4
<10.0
<5.0
58.3
<5.0
1 58.3
<0.52
<0.50
0.086
87.0
1.1
<0.10
<1.0
<0.0080

TABLE 3
SUMMARY OF GROUNDWATER QUALITY DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Field Measurements
Alkalinity
Nitrogen
Location
Date
Turbidity
(NTU)
DO
(mg/L)
pH (SU)
Specific
Conductivity (PS/cm)
Temperature
(°C)
Arsenic
(ug/L)
Barium
(ug/L)
Cadmium
(ug/L)
Chromium
(ug/L)
Lead
(ug/L)
Lithium
(ug/L)
Mercury
(ug/L)
Manganese
(ug/L)
Selenium
(ug/L)
Silver
(ug/L)
Bicarbonate
( (mg L)
Carbonate
( (mg L)
Total
(mg L)
Total
�mgg)
Total
Keldahl
Nitrogen
Nitrogen,
N (mg/L)
Total Dissolved
Solids (mg/L)
Chloride
(mg/L)
Fluoride
(mg/L)
Sulfate
(mg/L)
Cyanide
(mg/L)
8/8/2018
2.63
9.09
7.56
173.5
17.3
<10.0
<5.0
<1.0
<5.0
<5.0
NS
NS
NS
<10.0
<5.0
89.1
<5.0
89.1
<0.52
<0.50
0.1
128.0
1.1
0.1
<1.0
<0.0080
3/27/2019
NM
NM
NM
NM
NM
<10.0
<5.0
<1.0
<5.0
<5.0
108.0
NS
7.8
<10.0
<5.0
89.2
<5.0
89.2
<0.52
<0.50
0.2
125.0
1.1
<0.10
<1.0
<0.0080
4/26/2019
0.96
5.14
1 7.28
166.2
15.7
<10.0
1 <5.0
<1.0
<5.0
1 <5.0
100.0
1 <0.20
<5.0
<10.0
1 <5.0
93.3
<5.0
1 93.3
<0.52
1 <0.50
0.2
139.0
1.1
<0.10
<1.0
<0.0080
6/25/2019
1.47
4.69
7.16
163.1
16.5
<10.0
<5.0
<1.0
<5.0
<5.0
92.5
<0.20
<5.0
<10.0
<5.0
91.3
<5.0
91.3
<0.52
<0.50
0.2
119.0
1.1
<0.10
<1.0
<0.0080
7/24/2019
1.75
5.12
7.21
164.4
16.8
<10.0
<5.0
<1.0
<5.0
<5.0
90.2
NS
18.5
<10.0
<5.0
88.9
<5.0
88.9
<0.52
<0.50
0.14
106
1.1
<0.10
<1.0
<0.0080
8/21/2019
3.88
5.10
7.09
165.2
19.8
<10.0
<5.0
<1.0
<5.0
<5.0
102.0
<0.20
9.8
<10.0
<5.0
86.2
<5.0
86.2
<0.52
<0.50
0.14
113
1.3
0.1
<1.0
<0.0080
OW-21D
9/25/2019
0.84
4.93
6.41
161.5
17.0
<10.0
<5.0
<1.0
<5.0
<5.0
96.4
<0.20
<5.0
<10.0
<5.0
93.0
<5.0
93.0
<0.52
<0.50
0.14
109
1.1
<0.10
<1.0
<0.0080
10/29/2019
0.81
6.05
7.19
164
17
<10.0
<5.0
<1.0
<5.0
<5.0
102
<0.20
<5.0
<10.0
<5.0
85.1
<5.0
85.1
<0.52
<0.50
0.14
117
1.1
<0.10
<1.0
<0.0080
11/21/2019
2.83
5.24
7.77
165.5
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
107
<0.20
5.8
<10.0
<5.0
88.4
<5.0
88.4
<0.52
<0.50
0.15
122
1.1
<0.10
<1.0
<0.0080
12/18/2019
0.54
4.54
7.16
166.6
15.3
<10.0
<5.0
<1.0
<5.0
<5.0
109
<0.20
<5.0
<10.0
<5.0
89.5
<5.0
89.5
<0.52
<0.50
0.14
111
1.1
<0.10
<1.0
<0.0080
1/29/2020
0.39
5.72
7.22
158.1
14.6
<10.0
<5.0
<1.0
<5.0
<5.0
110
0.28
<5.0
<10.0
<5.0
88.3
<5.0
88.3
<0.52
<0.50
0.14
107
1.1
<0.10
<1.0
<0.0080
2/26/2020
0.49
5.25
7.31
167.0
15.0
<10.0
<5.0
<1.0
<5.0
<5.0
97.4
<0.20
<5.0
<10.0
<5.0
90.4
<5.0
90.4
<0.52
<0.50
0.13
102
1.1
<0.10
<1.0
<0.0080
8/9/2018
1.83
5.49
6.56
166.0
16.8
<10.0
<5.0
<1.0
<5.0
<5.0
NS
NS
NS
<10.0
<5.0
82.5
<5.0
82.5
<0.52
<0.50
0.3
121.0
1.7
<0.10
<1.0
<0.0080
3/27/2019
NM
NM
NM
NM
NM
26.0
<5.0
<1.0
<5.0
<5.0
1060
NS
17.1
<10.0
<5.0
72.4
<5.0
72.4
<0.52
<0.50
<0.040
110.0
1.3
2.3
8.7
<0.0080
4/25/2019
0.28
0.19
8.66
158.1
15.5
20.5
<5.0
<1.0
<5.0
<5.0
1000
<0.20
9.2
<10.0
<5.0
68.8
<5.0
68.8
0.6
0.6
<0.040
122.0
1.2
2.5
8.9
<0.0080
6/26/2019
0.28
0.36
8.54
150.5
15.9
13.0
<5.0
<1.0
<5.0
<5.0
1070
<0.20
6.4
<10.0
<5.0
64.0
<5.0
64.0
<0.52
<0.50
<0.040
101.0
1.2
2.8
8.8
<0.0080
7/23/2019
0.26
0.47
8.69
147.0
18.8
10.2
<5.0
<1.0
<5.0
<5.0
1100
NS
6.2
<10.0
<5.0
60
<5.0
60
<0.52
<0.50
<0.040
74.0
1.3
2.9
8.7
<0.0080
8/22/2019
0.23
0.33
8.62
151.5
18.2
<10.0
<5.0
<1.0
<5.0
<5.0
1190
<0.20
5.8
<10.0
<5.0
62.2
<5.0
62.2
<0.52
<0.50
<0.040
87.0
1.4
3.1
10.0
<0.0080
PW-1
9/25/2019
1.36
0.97
7.63
144.5
16.4
<10.0
<5.0
<1.0
<5.0
<5.0
1220
<0.20
6.5
<10.0
<5.0
64.1
<5.0
64.1
<0.52
<0.50
<0.040
110
1.3
2.7
9.1
<0.0080
10/29/2019
0.17
0.24
8.75
152.6
16.1
<10.0
<5.0
<1.0
<5.0
<5.0
1220
<0.20
5.3
<10.0
<5.0
60.7
<5.0
60.7
<0.52
<0.50
<0.040
102
1.2
2.8
9.7
<0.0080
11/20/2019
0.67
0.38
8.64
156.0
15.6
<10.0
<5.0
<1.0
<5.0
<5.0
1370
<0.20
5.1
<10.0
<5.0
62.5
<5.0
62.5
<0.52
<0.50
<0.040
115
1.3
2.9
9.4
<0.0080
12/18/2019
0.38
0.14
8.66
157.0
14.7
<10.0
<5.0
<1.0
<5.0
<5.0
1350
<0.20
5.2
<10.0
<5.0
66.2
<5.0
66.2
<0.52
<0.50
<0.040
97.0
1.2
2.4
8.9
<0.0080
1/29/2020
0.20
2.40
8.66
150.0
13.7
<10.0
<5.0
<1.0
<5.0
<5.0
1320
0.27
5.0
<10.0
<5.0
65.9
<5.0
65.9
<0.52
<0.50
<0.040
98.0
1.2
2.8
9.7
0.010
2/27/2020
0.38
0.77
8.69
157.7
13.6
<10.0
<5.0
<1.0
<5.0
<5.0
1210
<0.20
5.2
<10.0
<5.0
69.9
<5.0
69.9
<0.52
<0.50
<0.040
74.0
1.2
2.6
9.2
<0.0080
NCAC 2L Standards
--
--
6.5-8.5
--
I
10
700
2
10
15
--
--
50
20
20
--
--
--
--
--
11
--
250
2
250
70
Notes:
NTU - nephelometric turbidity units
mg/L - miligrams per liter
SU - standard units
pS/cm - microsiemens per centimeter
NM - not measured
NS - not sampled
-- - no established NCAC 2L Standard for analyte
8.75 - Result is above NCAC 2L Standards
Sample diluted due to the presence of high levels of non -target analytes or other matrix interference
Aluminum, Antimony, Beryllium, Calcium, Copper, Iron, Potassium, Sodium, Thallium and Zinc were analyzed in August 2018; Refer to Technical Memorandum from March 1, 2019

TABLE 4
SUMMARY OF SURFACE WATER QUALITY DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Field Measurements
Metals
Alkalinity
Chlorophyll & Pheopytin
Nitrogen
Location
Date
Total
Preci itation
P
in Past72
Hours
Turbidity
(NTU)
DO
(mg/L)
pH
Specific
Conductivity
(�/cm)
ORP
(mv)
Temperature
(°C)
Arsenic
(pg/L)
Barium
(pg/L)
Cadmium
(pg/L)
Chromium
(pg/L)
Lead
(pg/L)
Lithium
(pg/L)
Manganese
(pg/L)
Selenium
(pg/L)
Silver
(pg/L)
Mercury
(pg/L)
Bicarbonate
(CaCO3)
(mg/L)
Carbonate
(CaCO3)
(mg/L)
Total
CaCO3
(mg/L)
Chlorophyll a
(mg/m^3)
Chlorophyll b
(mg/m^3)
Chlorophyll c
(mg/m^3)
Chlorophyll a
(Corrected)
(mg/m^3)
Pheophytin
(mg/m^3)
Total
Nitrogen
(mg/L)
Nitrogen,
Ammonia
(mg/L)
Total
Kjeldahl
Nitrogen
(mg/L)
Nitrogen,
NO2+NO3
(mg/L)
Total
Suspended
Solids
(mg/L)
Total
Dissolved
Solids
(mg/L)
Chloride
(mg/L)
Fluoride
(mg/L)
Sulfate
(mg/L)
Phosphorus
(mg/L)
Cyanide
(mg/L)
2/14/2019
0.72
8.52
15.55
6.17
61.3
298.1
6.1
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
10.4
<7.7
<7.7
<7.7
14.9
NS
<0.10
NS
NS
4.1
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
12.50
6.55
147.8
179.7
9.8
<10.0
12.4
<1.0
<5.0
<5.0
10.8
24.9
<10.0
<5.0
<0.20
21.7
<5.0
21.7
<5.0
<5.0
<5.0
<5.0
72.2
0.79
<0.10
<0.50
0.53
4.4
52.0
3.5
<0.10
2.6
<0.050
<0.0080
4/23/2019
1.69
10.30
9.82
7.31
68.5
41.3
13.6
<10.0
17.3
<1.0
<5.0
<5.0
12.4
44
<10.0
<5.0
<0.20
22.7
<5.0
22.7
<5.0
<5.0
<5.0
<5.0
<5.0
0.87
<0.10
<0.50
0.56
7.9
80
3.4
<0.10
2.6
<0.050
<0.0080
5/23/2019
0.00
NM
8.24
7.40
69.7
35.5
18.6
<10.0
15.3
<1.0
<5.0
<5.0
17.8
47
<10.0
<5.0
<0.20
21.2
<5.0
21.2
<5.0
<5.0
<5.0
<5.0
<5.0
1.10
<0.10
<0.50
0.65
9.0
71.0
3.8
<0.10
1.7
0.06
<0.0080
6/13/2019
1.11
15.4
15.16
8.67
70.6
121.8
17.1
<10.0
16.3
<1.0
<5.0
<5.0
15.2
42.9
<10.0
<5.0
<0.20
22.7
<5.0
22.7
5.2
<5.0
<5.0
<5.0
<5.0
0.83
<0.10
<0.50
0.53
4.9
59.0
3.7
<0.10
2.0
<0.050
<0.0080
7/2/2019
0.02
9.8
7.89
6.99
76.6
-61.9
21.5
<10.0
15.0
<1.0
<5.0
<5.0
16.9
52.0
<10.0
<5.0
<0.20
27.2
<5.0
27.2
<5.2
<5.2
<5.2
<5.2
7.7
1.0
<0.10
<0.50
0.64
6.2
51.0
3.7
<0.10
1.5
0.054
<0.0080
Site-1
8/20/2019
0.00
21.3
1 7.55
7.57
72.2
24.0
21.9
<10.0
17.3
<1.0
<5.0
<5.0
16.6
75.2
<10.0
<5.0
<0.20
26.9
<5.0
26.9
3.1
NM
NM
NM
<2.0
0.85
<0.10
<0.50
0.42
12.7
80.0
1 3.2
<0.10
2.1
0.083
<0.0080
9/23/2019
0.00
6.3
7.59
7.37
71.0
47.0
18.0
<10.0
11.2
<1.0
<5.0
<5.0
25.0
49.7
<10.0
<5.0
<0.20
31.5
<5.0
31.5
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.36
3.0
65.0
3.6
<0.10
1.0
0.054
<0.0080
10/21/2019
1.56
8.22
9.29
7.11
70.4
134.7
14.1
<10.0
11.8
<1.0
<5.0
<5.0
17.5
41.1
<10.0
<5.0
<0.20
1 26.0
<5.0
26.0
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
1 0.32
4.6
73.0
4.0
<0.10
1.9
0.069
<0.0080
11/19/2019
0.03
3.22
10.97
7.50
1 74.7
36.5
1 9.1
<10.0
1 11.4
<1.0
1 <5.0
<5.0
19.3
28.4
<10.0
1 <5.0
NM
28.9
<5.0
28.9
2.1
1 NM
NM
NM
<2.0
0.56
<0.10
<0.50
0.33
<2.5
65
4.2
<0.10
1.6
<0.050
<0.0080
12/16/2019
1.60
12.1
10.72
7.01
70.8
-145.6
8.2
<10.0
16.6
<1.0
<5.0
<5.0
13.4
45.1
<10.0
<5.0
<0.20
21.4
<5.0
21.4
<2.0
NM
NM
NM
<2.0
1.0
<0.10
<0.50
0.68
5.8
78.0
3.9
<0.10
3.6
0.055
<0.0080
1/27/2020
1.22
11.50
13.05
7.83
61.3
103.5
6.9
<10.0
16.1
<1.0
<5.0
<5.0
11.3
31.1
<10.0
<5.0
<0.20
19.4
<5.0
19.4
4.7
NM
NM
NM
<2.0
0.96
<0.10
<0.50
0.65
6.9
42
3.6
<0.10
3.4
<0.050
<0.0080
2/14/2019
0.72
7.91
19.04
6.59
55.8
251.7
7
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
<5.0
<5.0
<5.0
<5.0
66.5
NS
<0.10
NS
NS
<2.5
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
1 12.19
6.93
145.6
108.9
10.6
<10.0
11.0
<1.0
<5.0
<5.0
26.3
13.1
<10.0
<5.0
<0.20
23.1
<5.0
23.1
<5.0
<5.0
<5.0
<5.0
88.0
0.58
<0.10
<0.50
0.39
4.3
57.0
2.7
<0.10
1 1.2
<0.050
<0.0080
4/23/2019
1 1.69
9.40
10.70
7.21
64.4
7.5
13.5
<10.0
15.7
<1.0
<5.0
<5.0
32.2
29.4
<10.0
<5.0
<0.20
25
<5.0
25
<5.0
<5.0
<5.0
<5.0
1 <5.0
0.72
<0.10
<0.50
0.47
5.5
107
2.7
<0.10
1.2
0.051
<0.0080
5/23/2019
0.00
NM
8.11
7.15
65.9
36.4
17.7
<10.0
18.1
<1.0
<5.0
<5.0
37.5
28.4
<10.0
<5.0
<0.20
23.4
<5.0
23.4
<5.0
<5.0
<5.0
<5.0
7.0
0.91
<0.10
<0.50
0.54
9.1
85.0
2.7
<0.10
<1.0
0.066
<0.0080
6/13/2019
1.11
13.3
15.96
8.07
63.9
1 46.0
16.5
<10.0
15.8
1 <1.0
<5.0
<5.0
35.8
24.8
1 <10.0
<5.0
<0.20
23.2
<5.0
23.2
<5.0
<5.0
<5.0
<5.0
<5.0
0.71
<0.10
<0.50
0.44
4.1
58.0
2.8
<0.10
1.2
<0.050
<0.0080
7/2/2019
0.02
12.1
8.09
6.62
68.1
-52.0
19.8
<10.0
15.0
<1.0
<5.0
<5.0
38.2
27.2
<10.0
<5.0
<0.20
27.0
<5.0
27.0
<5.0
<5.0
<5.0
<5.0
<5.0
0.86
<0.10
<0.50
0.51
7.9
42.0
2.5
<0.10
<1.0
0.052
<0.0080
Site-2
8/20/2019
0.00
16.9
8.05
7.55
68.5
33.3
20.5
<10.0
18.3
<1.0
<5.0
<5.0
37.9
36.2
<10.0
<5.0
<0.20
28.4
<5.0
28.4
2.8
NM
NM
NM
<2.0
0.57
<0.10
<0.50
0.32
11.6
84.0
2.5
<0.10
<1.0
0.072
<0.0080
9/23/2019
0.00
4.51
7.61
7.21
61.5
49.3
16.9
<10.0
12.4
<1.0
<5.0
<5.0
45.9
20.0
<10.0
<5.0
<0.20
30.0
<5.0
30.0
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.25
2.8
63.0
2.2
<0.10
<1.0
<0.050
<0.0080
10/21/2019
1.56
9.83
1 9.81
7.57
56.4
109.6
14.0
<10.0
12.9
<1.0
<5.0
<5.0
39.5
9.9
<10.0
<5.0
<0.20
28.4
1 <5.0
28.4
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.28
2.8
53.0
2.6
<0.10
1.1
0.054
<0.0080
11/19/2019
0.03
4.15
10.46
7.26
66.1
41.2
9.8
<10.0
14.0
<1.0
<5.0
<5.0
40.8
6.5
<10.0
<5.01
NM
28.9
<5.0
28.9
<2.0
1 NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.24
3.1
57.0
2.7
<0.10
<1.0
<0.050
<0.0080
12/16/2019
1.60
7.93
10.09
7.12
1 63.6
-173.2
9.4
<10.0
1 14.2
<1.0
<5.0
<5.0
37.6
11.7
<10.0
<5.0
<0.20
22.9
<5.0
22.9
<2.0
NM
NM
NM
<2.0
0.89
1 <0.10
<0.50
0.65
3.1
72.0
3
<0.10
1.5
0.056
<0.0080
1/27/2020
1.22
7.51
12.48
7.54
57.4
88.4
1 7.5
<10.0
17.6
<1.0
I <5.0
<5.0
32.0
13.7
<10.0
<5.0
<0.20
22.4
<5.0
22.4
<2.0
NM
NM
NM
<2.0
0.82
<0.10
<0.50
0.63
3.2
42.0
2.8
<0.10
1.4
<0.050
<0.0080
2/14/2019
0.72
9.89
26.75
7.05
61.1
221.7
6.5
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
10.5
<5.0
<5.0
<5.0
15.7
NS
<0.10
NS
NS
5.6
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
11.80
6.97
151.3
132.2
10.2
<10.0
12.1
<1.0
<5.0
<5.0
10.2
27.3
<10.0
<5.0
<0.20
21.5
<5.0
21.5
<5.0
<5.0
<5.0
<5.0
91.0
0.86
<0.10
<0.50
0.53
4.8
57.0
3.5
<0.10
2.7
<0.050
<0.0080
4/23/2019
1.69
10.8
9.60
6.92
68.0
45.2
13.9
<10.0
170.0
<1.0
<5.0
<5.0
12.4
53.4
<10.0
<5.0
<0.20
22.9
<5.0
1 22.9
<5.0
<5.0
<5.0
<5.0
<5.0
0.92
<0.10
<0.50
1 0.57
12.3
120
3.4
<0.10
2.7
<0.050
<0.0080
5/23/2019
1 0.00
NM
1 7.65
6.94
69.3
34.2
18.9
<10.0
22.5
<1.0
<5.0
<5.0
19.2
161.0
<10.0
1 <5.0
<0.20
21.7
<5.0
21.7
<5.0
<5.0
<5.0
<5.0
23.5
2.20
<0.10
1.5
0.66
27.9
74.0
3.7
<0.10
1.7
1 0.089
<0.0080
6/13/2019
1.11
13.4
15.96
8.07
63.9
46.0
16.5
<10.0
16.6
<1.0
<5.0
<5.0
13.9
49.3
<10.0
<5.0
<0.20
23.3
<5.0
23.3
<5.0
1 <5.0
<5.0
<5.0
<5.0
0.80
<0.10
<0.50
0.55
5.9
59.0
3.9
<0.10
2.3
<0.50
<0.0080
7/2/2019
0.02
8.15
6.83
7.04
77.0
-79.8
21.4
<10.0
14.5
<1.0
<5.0
<5.0
17.0
55.3
<10.0
<5.0
<0.20
26.5
<5.0
26.5
<5.3
<5.3
<5.3
<5.3
7.1
1.10
<0.10
<0.50
0.64
4.9
61.0
3.7
<0.10
1.4
0.055
<0.0080
Site-3
8/20/2019
0.00
12.2
7.90
7.37
73.3
38.3
1 21.9
<10.0
19.4
<1.0
<5.0
<5.0
17.0
112
<10.0
<5.0
<0.20
28.2
<5.0
28.2
4.5
NM
NM
NM
4.9
0.83
<0.10
<0.50
0.44
56.6
69.0
3.5
<0.10
1.6
0.087
<0.0080
9/23/2019
0.00
7.4
7.19
7.14
70.1
52.8
17.7
<10.0
10.9
<1.0
<5.0
<5.0
22.9
51.8
<10.0
<5.0
<0.20
30.5
<5.0
30.5
<2.0
NM
NM
NM
<2.0
0.61
<0.10
<0.50
0.39
<2.5
70.0
3.5
<0.10
1.2
0.051
<0.0080
10/21/2019
1.56
10.5
8.27
7.23
72.5
110.8
14.2
<10.0
11.6
<1.0
<5.0
<5.0
17.4
36.6
<10.0
<5.0
<0.20
26.7
<5.0
26.7
<2.0
NM
NM
NM
<2.0
0.71
<0.10
<0.50
0.32
1 8.1
54.0
4.2
<0.10
1.8
0.059
<0.0080
11/19/2019
0.03
3.98
9.58
7.47
75.2
34.6
9.4
<10.0
12.1
<1.0
<5.0
<5.0
17.9
34.2
<10.0
<5.01
NM
28.5
1 <5.0
28.5
2.0
NM
NM
NM
<2.0
0.6
<0.10
<0.50
0.33
<2.5
1 68.0
5.5
<0.10
2.3
<0.050
<0.0080
12/16/2019
1.60
12.8
1 10.83
7.07
71.2
-160.6
8.6
<10.0
16.2
<1.0
<5.0
<5.0
12.5
43.4
<10.0
<5.0
<0.20
20.6
<5.0
20.6
3.6
NM
NM
NM
<2.0
1.1
<0.10
<0.50
0.69
7.1
76.0
4
<0.10
3.6
1 0.052
<0.0080
1/27/2020
1.22
11.1
13.34
7.39
61.3
98.2
7.1
<10.0
17.5
<1.0
<5.0
<5.0
11.1
35.0
<10.0
<5.0
<0.20
19.3
<5.0
19.3
4.7
NM
NM
NM
<2.0
1.0
1 <0.10
<0.50
0.68
6.2
47.0
3.7
<0.10
3.5
0.051
<0.0080
2/14/2019
0.72
7.06
14.10
6.73
67.8
232.8
7.0
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
16.0
<5.0
<5.0
<5.0
64.4
NS
<0.10
NS
NS
4.8
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
12.80
7.03
156.5
119.51
10.6
<10.0
13.7
<1.0
<5.0
<5.0
8.7
21.2
<10.0
<5.0
<0.20
24.8
<5.0
24.8
7.9
<5.9
<5.9
<5.9
107
0.90
<0.10
<0.50
0.54
5.4
66.0
3.6
<0.10
2.9
<0.050
<0.0080
4/23/2019
1.69
9.91
10.10
6.83
74.7
66.3
14.4
<10.0
20.3
<1.0
<5.0
<5.0
10.1
39.1
<10.0
<5.0
<0.20
25.9
<5.0
25.9
<5.0
<5.0
<5.0
<5.0
20.5
0.95
<0.10
<0.50
0.61
8
75
3.4
<0.10
2.9
0.053
<0.0080
5/23/2019
0.00
NM
7.94
7.00
78.9
25.2
18.8
<10.0
17.8
<1.0
<5.0
<5.0
14.3
37.0
<10.0
1 <5.0
<0.20
28.0
<5.0
28.0
<5.0
<5.0
<5.0
<5.0
19.4
1.2
<0.10
<0.50
0.78
5.8
875
3.6
<0.10
1.9
0.064
<0.0080
6/13/2019
1 1.11
11.60
7.79
7.34
78.5
88.9
17.4
<10.0
20.2
<1.0
<5.0
<5.0
12.0
36.0
<10.0
<5.0
<0.20
27.2
<5.0
27.2
<5.0
<5.0
<5.0
<5.0
<5.0
0.87
<0.10
<0.50
0.58
4.6
76.0
3.8
<0.10
2.4
<0.050
<0.0080
7/2/2019
0.02
11.4
7.54
7.00
82.9
-84.1
21.7
<10.0
17.5
<1.0
<5.0
<5.0
14.3
50.2
<10.0
<5.0
<0.20
30.1
<5.0
30.1
5.7
<5.3
<5.3
<5.3
9.1
1.20
<0.10
<0.50
0.73
7.0
70.0
3.7
<0.10
1.6
0.07
<0.0080
Site 4
8/20/2019
0.00
9.79
8.53
7.34
80.6
33.3
22.0
<10.0
20.1
1 <1.0
<5.0
1 <5.0
13.0
57.3
<10.0
<5.0
<0.20
31.9
<5.0
31.9
7.1
NM
NM
NM
<2.0
0.81
<0.10
<0.50
0.48
10.7
78.0
3.6
<0.10
1.9
0.11
<0.0080
9/23/2019
0.00
3.54
7.65
6.93
81.6
57.6
18.1
<10.0
12.6
<1.0
<5.0
<5.0
20.6
32.7
<10.0
<5.0
<0.20
35.1
<5.0
35.1
<2.0
NM
NM
NM
<2.0
0.77
<0.10
<0.50
0.57
<2.5
72.0
3.7
<0.10
1.3
0.073
<0.0080
10/21/2019
1.56
4.34
8.83
6.74
70.7
102.E
14.4
<10.0
13.4
<1.0
<5.0
<5.0
14.4
23.4
<10.0
<5.0
<0.20
30.4
<5.0
30.4
<2.0
NM
NM
NM
<2.0
0.73
<0.10
<0.50
0.41
2.7
69.0
4.3
<0.10
2.3
0.066
<0.0080
11/19/2019
0.03
3.31
11.46
7.18
61.0
42.2
9.6
<10.0
13.8
<1.0
<5.0
<5.0
15.3
18.4
<10.0
<5.0
NM
33.8
<5.0
33.8
<2.0
NM
NM
NM
<2.0
0.68
<0.10
<0.50
0.38
<2.5
70.0
4.4
<0.10
1.7
0.055
<0.0080
12/16/2019
1.60
8.35
10.21
6.86
78.3
-205.7
9.0
<10.0
18.1
<1.0
<5.0
<5.0
10.3
36.0
<10.0
<5.0
<0.20
25.3
<5.0
25.3
3.3
NM
NM
NM
<2.0
1.1
<0.10
<0.50
0.72
6.7
73.0
4.1
<0.10
3.6
0.063
<0.0080
1/27/2020
1.22
9.99
13.18
6.91
67.6
104.4
7.5
<10.0
19.2
<1.0
<5.0
<5.0
9.9
27.7
<10.0
<5.0
<0.20
22.5
<5.0
22.5
6.7
1 NM
NM
NM
<2.0
1.1
<0.10
<0.50
0.70
7.7
55.0
3.7
<0.10
1 3.5
0.067
<0.0080
2/14/2019
0.72
10.22
1 14.41
6.32
50.7
190.9
6.8
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
6.6
<5.0
<5.0
<5.0
61.0
NS
<0.10
NS
NS
3.2
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
12.18
6.61
140.4
122.4
10.3
<10.0
9.4
<1.0
<5.0
<5.0
1 10.3
33.3
<10.0
<5.0
<0.20
13.7
<5.0
13.7
<6.4
<6.4
<6.4
<6.4
172
0.79
<0.10
<0.50
0.53
<3.3
48.0
3.6
<0.10
2.4
<0.050
<0.0080
4/23/2019
1.69
10.2
9.92
6.71
1 57.0
45.6
14.2
<10.0
13.1
<1.0
<5.0
<5.0
13.8
61.9
<10.0
<5.0
<0.20
15.3
<5.0
15.3
<5.0
<5.0
<5.0
<5.0
<5.0
0.84
<0.10
<0.50
0.55
4.8
102
3.5
<0.10
2.4
<0.050
<0.0080
5/23/2019
0.00
NM
7.43
7.01
52.1
38.9
1 18.8
<10.0
11.7
<1.0
<5.0
<5.0
18.2
58.9
<0.50
<0.40
<0.20
16.6
<5.0
16.6
<5.6
<5.6
<5.6
<5.6
12.9
0.98
<0.10
<0.50
0.57
7.7
160
3.6
<0.10
1.4
<0.050
<0.0080
6/13/2019
1.11
11.2
8.08
7.28
50.1
96.6
17.3
<10.0
11.2
<1.0
<5.0
<5.0
16.8
55.7
1 <10.0
<5.0
<0.20
15.6
<5.0
15.6
<5.0
<5.0
<5.0
<5.0
<5.0
0.80
<0.10
<0.050
0.54
5.0
47.0
4.0
<0.10
2.1
<0.050
<0.0080
7/2/2019
0.02
10.8
7.77
6.78
63.2
-66.7
21.5
<10.0
10.5
<1.0
<5.0
<5.0
19.4
65.1
<10.0
<5.0
<0.20
21.4
<5.0
21.4
<5.0
<5.0
<5.0
<5.0
<5.0
0.87
<0.10
<0.50
0.53
6.9
45.0
3.8
<0.10
1.2
<0.05
<0.0080
Site-5
8/20/2019
0.00
6.18
8.11
7.36
61.4
31.4
21.8
<10.0
10.9
<1.0
<5.0
<5.0
19.2
79.2
<10.0
<5.0
<0.20
23.0
1 <5.0
23.0
2.0
NM
NM
NM
<2.0
0.71
<0.10
<0.50
0.36
3.0
52.0
3.5
<0.10
<1.0
<0.050
<0.0080
9/23/2019
0.00
5.59
1 7.48
7.01
54.6
42.9
17.9
<10.0
8.0
<1.0
<5.0
<5.0
24.2
49.4
<10.0
<5.0
<0.20
23.1
<5.0
23.1
<2.0
NM
NM
NM
<2.0
0.53
<0.10
<0.50
0.22
4.3
55.0
3.5
<0.10
1.1
<0.050
1 <0.0080
10/21/2019
1.56
6.93
9.93
6.74
59.9
126.1
14.3
<10.0
8.9
<1.0
<5.0
1 <5.0
1 18.7
33.8
<10.0
<5.0
<0.20
21.5
<5.0
21.5
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.25
<2.5
45.0
4.2
<0.10
1.3
<0.050
<0.0080
11/19/2019
0.03
3.04
11.941
7.42
11 60.5
39.0
9.7
<10.0
8.9
<1.0
<5.0
<5.0
21.2
45.4
<10.0
<5.01
NM
21.7
<5.0
21.7
<2.0
NM
NM
NM
<2.0
<0.52
<0.10
<0.50
0.26
<2.5
54.0
4.1
<0.10
1.6
<0.050
<0.0080
12/16/2019
1.60
14.4
1 9.62
1 6.69
1 58.9
-199.7
8.7
<10.0
13.8
<1.0
<5.0
<5.0
14.1
51.0
<10.0
<5.0
<0.20
14.7
<5.0
14.7
<2.0
NM
NM
NM
<2.0
0.91
<0.10
<0.50
0.66
5.2
52.0
4.0
<0.10
3.7
<0.050
<0.0080
1/27/2020
1.22
13.5
13.13
7.12
46.3
99.7
7.2
<10.0
13.4
<1.0
<5.0
<5.0
12.6
43.4
<10.0
<5.0
<0.20
14.3
<5.0
14.3
<2.0
NM
NM
NM
<2.0
0.98
<0.10
<0.50
0.62
5.0
47.0
3.7
<0.10
3.3
<0.050
<0.0080

TABLE 4
SUMMARY OF SURFACE WATER QUALITY DATA
PIEDMONT LITHIUM, INC.
GASTON COUNTY, NORTH CAROLINA
Field Measurements
Metals
Alkalinity
Chlorophyll & Pheopytin
Nitrogen
Location
Date
Total
P
Preci st 72n
nPast72
Hours
Turbidity
(NTU)
DO
(mg/L)
pH
Specific
Conductivity
(/cm)
ORP
(mv)
Temperature
(°C)
Arsenic
(pg/L)
Barium
(pg/L)
Cadmium
(pg/L)
Chromium
(pg/L)
Lead
(pg/L)
Lithium
(pg/L)
Manganese
(pg/L)
Selenium
(pg/L)
Silver
(pg/L)
Mercury
(pg/L)
Bicarbonate
(CaCO3)
(mg/L)
Carbonate
(CaCO3)
(mg/L)
Total
CaCO3
(mg/L)
Chlorophyll a
(mg/m^3)
Chlorophyll b
(mg/m^3)
Chlorophyll c
(mg/m^3)
Chlorophyll a
(Corrected)
(mg/m^3)
Pheophytin
(mg/m^3)
Total
Nitrogen
(mg/L)
Nitrogen,
Ammonia
(mg/L)
Total
Kjeldahl
Nitrogen
(mg/L)
Nitrogen,
NO2+NO3
(mg/L)
Total
Suspended
Solids
(mg/L)
Total
Dissolved
Solids
(mg/L)
Chloride
(mg/L)
Fluoride
(mg/L)
Sulfate
(mg/L)
Phosphorus
(mg/L)
Cyanide
(mg/L)
2/14/2019
0.72
7.04
23.62
7.00
67.8
247.2
7.9
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
20.7
<5.0
<5.0
<5.0
52.1
NS
<0.10
NS
NS
5.6
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
12.43
6.82
157.1
148.8
11.0
<10.0
15.0
<1.0
<5.0
<5.0
7.5
24.0
<10.0
<5.0
<0.20
24.2
<5.0
24.2
8.9
<5.6
<5.6
<5.6
167
0.94
<0.10
<0.50
0.57
5.9
66.0
3.6
<0.10
2.9
<0.050
<0.0080
4/23/2019
1.69
10.1
9.62
7.05
74.5
80.8
16.1
<10.0
20.9
<1.0
<5.0
<5.0
8.3
43
<10.0
<5.0
<0.20
25.2
<5.0
25.2
<5.0
<5.0
<5.0
<5.0
<5.0
1
<0.10
<0.50
0.63
9.6
101
3.4
<0.10
3.0
0.058
<0.0080
5/23/2019
0.00
NM
7.35
7.04
76.1
26.3
19.2
<10.0
18.7
<1.0
<5.0
<5.0
12.0
54.7
<10.0
<5.0
<0.20
26.2
<5.0
26.2
<5.0
<5.0
<5.0
<5.0
<5.0
1.2
<0.10
<0.50
0.73
6.1
33.0
3.7
<0.10
2.0
0.068
<0.0080
6/13/2019
1.11
11.6
7.88
7.22
78.8
91.1
17.8
<10.0
20.0
<1.0
<5.0
<5.0
9.4
45.7
<10.0
<5.0
<0.20
26.0
<5.0
26.0
<5.0
<5.0
<5.0
<5.0
6.7
0.98
<0.10
<0.50
0.61
5.6
72.0
4.0
<0.10
2.4
<0.050
<0.0080
7/2/2019
0.02
13.8
6.23
7.08
82.6
-85.6
21.9
<10.0
18.7
<1.0
<5.0
<5.0
10.7
73.0
<10.0
<5.0
<0.20
29.4
<5.0
29.4
9.5
<5.0
<5.0
<5.0
5.7
1.40
<0.10
0.63
0.73
8.9
60.0
3.8
<0.10
1.6
0.081
<0.0080
Site-6
8/20/2019
0.00
11.0
1 8.59
7.32
84.9
34.9
22.0
<10.0
19.9
<1.0
<5.0
<5.0
10.8
70.9
<10.0
<5.0
<0.20
33.7
<5.0
33.7
7.6
NM
NM
NM
<2.0
0.93
<0.10
<0.50
0.51
8.4
79.0
3.7
1 <0.10
1.8
0.081
<0.0080
9/23/2019
0.00
4.66
7.29
7.17
80.1
45.9
18.1
<10.0
12.7
<1.0
<5.0
<5.0
15.0
58.4
<10.0
<5.0
<0.20
34.3
<5.0
34.3
<2.0
NM
NM
NM
<2.0
0.89
<0.10
<0.50
0.56
<2.5
79.0
3.7
<0.10
1.3
0.075
<0.0080
10/21/2019
1.56
7.87
8.06
6.82
79.0
98.8
14.9
<10.0
1 15.8
<1.0
<5.0
<5.0
11.7
59.8
<10.0
<5.0
<0.20
31.6
<5.0
31.6
2.6
NM
NM
NM
<2.0
0.79
<0.10
<0.50
0.44
5.3
70.0
4.3
<0.10
2.1
0.080
<0.0080
11/19/2019
0.03
6.20
11.01
7.41
85.5
39.7
10.1
<10.0
15.3
<1.0
<5.0
<5.0
12.4
41.6
<10.0
<5.0
NM
33.3
<5.0
33.3
5.3
NM
NM
NM
<2.0
0.93
<0.10
0.5
0.43
<2.5
75.0
4.6
<0.10
1.9
0.062
<0.0080
12/16/2019
1.60
7.93
9.48
6.82
1 79.3
-201.9
9.7
<10.0
19
<1.0
1 <5.0
<5.0
1 9.5
1 42.3
<10.0
1 <5.0
<0.20
1 25.0
<5.0
1 25.0
6.7
1 NM
NM
NM
<2.0
1.2
1 <0.10
0.51
0.71
4.9
62.0
4.1
<0.10
3.7
0.064
<0.0080
1/27/2020
1.22
9.70
12.66
6.91
67.6
103.5
8.0
<10.0
20.0
<1.0
<5.0
<5.0
8.4
31.3
<10.0
<5.0
<0.20
22.2
<5.0
22.2
8.1
NM
NM
NM
<2.0
1.2
<0.10
<0.50
0.71
7.6
50.0
3.7
<0.10
3.5
0.070
<0.0080
2/14/2019
0.72
6.64
19.03
6.91
66.4
221.8
9.1
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
19.7
<5.0
<5.0
14.6
7.5
NS
<0.10
NS
NS
7.2
NM
NM
NM
NM
<0.050
NM
3/21/2019
0.00
NM
1 11.56
6.74
156.1
113.9
11.5
<10.0
16.3
<1.0
<5.0
<5.0
6.4
23.3
<10.0
<5.0
<0.20
23.3
<5.0
23.3
10.2
<5.3
<5.3
<5.3
150
0.92
<0.10
<0.50
<0.55
6.5
1 65.0
3.7
1 <0.10
3.1
<0.050
<0.0080
4/23/2019
1.69
9.65
9.44
6.91
71.6
88.8
17.0
<10.0
21
<1.0
<5.0
<5.0
6.8
39.5
<10.0
<5.0
<0.20
24.2
<5.0
24.2
11.0
7.5
13.0
14.8
1 <5.0
1.1
<0.10
<0.50
1 0.62
10.8
84
3.5
<0.10
3.1
0.056
<0.0080
5/23/2019
1 0.00
NM
7.48
7.03
77.0
27.4
19.1
<10.0
19.5
<1.0
<5.0
<5.0
9.9
70.9
<10.0
<5.0
<0.20
25.8
<5.0
25.8
<5.0
<5.0
<5.0
<5.0
<5.0
1.4
<0.10
0.67
0.71
13.7
<25.0
3.8
<0.10
2.1
0.059
<0.0080
6/13/2019
1.11
9.00
7.73
6.97
79.3
84.8
18.3
<10.0
19.7
<1.0
<5.0
<5.0
7.8
50.3
<10.0
<5.0
<0.20
24.7
<5.0
<24.7
5.1
<5.0
<5.0
<5.0
<5.0
0.92
<0.10
<0.50
0.64
4.1
69.0
4.8
<0.10
2.6
<0.050
<0.0080
7/2/2019
0.02
8.86
7.08
6.73
79.7
-84.1
21.9
<10.0
18.5
<1.0
<5.0
<5.0
8.2
78.1
<10.0
<5.0
<0.20
27.4
<5.0
27.2
9.4
<5.0
<5.0
<5.0
<5.0
1.10
<0.10
<0.50
0.68
7.7
66.0
3.9
<0.10
1.7
0.069
<0.0080
Site-7
8/20/2019
0.00
11.2
8.61
7.52
84.7
33.6
21.9
<10.0
22.0
<1.0
<5.0
<5.0
8.0
112
<10.0
<5.0
<0.20
33.4
<5.0
33.4
9.5
NM
NM
NM
<2.0
1.5
<0.10
1
0.45
13.4
69.0
4.0
<0.10
1.9
0.170
<0.0080
9/23/2019
0.00
8.5
7.96
6.84
77.6
60.7
18.8
<10.0
16.0
<1.0
<5.0
<5.0
10.8
115
<10.0
<5.0
<0.20
33.4
<5.0
33.4
3.1
NM
NM
NM
<2.0
0.69
<0.10
<0.50
0.40
5.1
81.0
3.9
<0.10
1.5
0.075
<0.0080
10/21/2019
1.56
8.49
1 8.39
6.31
79.9
121.2
14.6
<10.0
17.8
<1.0
<5.0
<5.0
8.2
103
<10.0
<5.0
<0.20
29.9
<5.0
29.9
<2.0
NM
NM
NM
<2.0
0.59
<0.10
<0.50
0.39
1 9.6
1 66.0
5.7
<0.10
2.3
0.078
<0.0080
11/19/2019
0.03
4.14
9.96
7.09
84.6
46.2
10.0
<10.0
16.5
<1.0
<5.0
<5.0
9.2
63.9
<10.0
<5.0
NM
31.9
<5.0
31.9
2.4
NM
NM
NM
1 <2.0
0.95
<0.10
0.55
0.41
<2.5
76.0
5.0
<0.10
2.2
0.057
I<0.0080
112/16/20191
1.60
6.90
9.34
6.68
68.4
-227.2
10.1
<10.0
19.8
<1.0
<5.0
<5.0
7.6
52.5
<10.0
<5.0
<0.20
25.0
<5.0
25.0
2.4
NM
NM
NM
<2.0
1.2
<0.10
0.5
0.72
4.6
93.0
4.3
<0.10
3.9
0.062
<0.0080
1/27/2020
1.22
9.85
12.30
6.72
59.5
92.6
8.3
<10.0
19.8
<1.0
<5.0
<5.0
6.7
31.5
<10.0
<5.0
<0.20
21.3
<5.0
21.3
13.8
NM
NM
NM
<2.0
1.2
<0.10
<0.50
0.69
7.6
50.0
3.8
<0.10
3.8
0.069
<0.0080
NCAC 2B Standards
<50
6.0 - 9.0
10.0
170
NA
11
NA
5
NA
0.012
40
--
10
500
250
1.8
250
5
Notes.
NTU - nephelometric turbidity units
mg/L - miligrams per liter
SU - standard units
pS/cm - microsiemens per centimeter
my - milivolt
mg/m^3 - miligram per meter cubed
NM - not measured
NS -not sampled
NA - not applicable; surface water standards for these constituents are hardness dependent
-- - no established NCAC 2L Standard for analyte
0.72 - non -ambient; Precipitation in the 72 hours prior to sampling was greater than 0.1 inch
Precipitation amonutswere taken from CoCoRaHS

Piedmont Lithium I Technical Memorandum — Water Quality Testing ���
Tables
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