Appendix C - Associated Lithium Hydroxide Conversion Plant Drawings

Piedmont Lithium Carolinas, Inc. I North Carolina Mining Permit Application
Appendices
PIEDMONT
LITHIUM
Appendix C: Associated
Lithium Hydroxide
Conversion Plant Drawings
(Sheets 1-18)

PIED/�nONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
�N C A
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
LITHIUM HYDROXIDE
CONVERSION PLANT- PLAN VIEW
PHASE 1
FILENAME - OOC-01 SHEET
SCALE I - 1" = 200'
1 OF 18

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CA►►►O
JJLU
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
LITHIUM HYDROXIDE
CONVERSION PLANT- PLAN VIEW
PHASE 2
FILENAME I - OOC-02 I SHEET
SCALE I - 1" = 200'
2 OF 18

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P I E D/�AON T
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
;X�-
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i
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PROJECT MANAGER V. HAYNES
x O oO Xf�\ IIIIIII IIII \ ,��
0 0 0 0
ST-14 I
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11 00 2
K - NP �`8��7/2a21
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
N
200 0 200 400
SCALE IN FEET
GENERAL LEGEND
■ ■ ■ ■ ■ STREAM CROSSING DRAINAGE AREA
TIME OF CONCENTRATION C
■ - - SEDIMENT BASIN/TRAP DRAINAGE AREA
DELINEATED WETLANDS
DELINEATED WATERS
PROPOSED CONTOURS
EXISTING CONTOURS
—X—X
6-FOOT FENCE LINE
—X—
SILT FENCE LOCATION
WASTE ROCK CONVEYOR
ORE CONVEYOR
a
BUILDING / STRUCTURE
ADJACENT PROPERTY LINE
FLUME
UNDERDRAIN
UD-2
UNDERDRAIN LABEL
DRAINAGE DITCH
CULVERT
CULVERT LABEL
SB-4
SEDIMENT BASIN LABEL
ST-11
SEDIMENT TRAP LABEL
---
FLOW DIRECTION ARROW
❑
EROSION AND SEDIMENT
CONTROL STRUCTURE
GASTON COUNTY PARCEL LINES
MINE PERMIT LINE
25 FT MINE PERMIT BUFFER
100 FT LOT BUFFER
200 FT STRUCTURES BUFFER
300 FT RESIDENTIAL BUFFER
40 FT PLANTING BUFFER
30 FT. DELINEATED STREAM BUFFER
ME - - -
SEDIMENT TRAP/BASIN DRAINAGE AREA
DRAINAGE ANALYSIS MAP,
PLAN VIEW
FILENAME I - OOC-03
SCALE I - 1" = 200'
SHEET
3 OF 18
0

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
C ARD
0 0` 2
E/27/2011
�a�m nu►,,.
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 19
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-04
SCALE I - 1" = 50'
SHEET
4 OF 18

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
C A R
V&6 0
K
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 29
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-05
SCALE I - 1" = 50'
SHEET
5 OF 18

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
C A RO
0 002
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 39
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-06
SCALE I - 1" = 50'
SHEET
6 OF 18

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
0111111111111,
CARD
ON
v
F'R/EK .NF .�°8/�7/.202-1
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 4,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-07
SCALE I - 1" = 50'
SHEET
7 OF 18

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
C A R
V&6 0
K
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 59
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-08
SCALE I - 1" = 50'
SHEET

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 69
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-09
SCALE I - 1" = 50'
SHEET
9 OF 18

1
CONSTRUCTION
2
STAGING AREA 4/ OUTLET PROTECTION
SEE DETAIL SHEET 14 OF 18 y
Approx. 6 acres
y
y
POROUS BAFFLES
SEE DETAIL SHEET 14 OF 18
72" OUTLET STRUCTURE WITH
SKIMMER AND 50 LF OF 24" DOUBLE
BARREL CMP
SEE DETAILS THIS SHEET
BOTTOM OF POND �� +
ELEV. 891.00 / ,+`+
� +`+
TOP OF BERM ELEV. 895.00 1 I + •+�
1 I
' SILT FENCE
— - SEE DETAIL SHEET 14 OF 18
x—x-x— + EMERGENCY SPILLWAY
xx-x-x-x—x—x-z-x—x-z-x- —x-x-x-x- c�c—x—x—x-
x-x_x_x-x_x-x-x x x x x xx xx Xx-x—x—x—x x x_x_x-x-x-x-x-x-x-x-x_x_x_x_x X k k SEE DETAILTHISSHEET
x x-x-x
+ 6' WIRE FENCE
SB-7
+ SEE DETAIL SHEET 14 OF 18
+,
+\
+\
+
+
f
* SB-7 IS FOR PHASE 1 CONSTRUCTION STAGING AREA. ONCE CONSTRUCTION IS COMPLETE
AND STAGING AREA HAS BEEN STABILIZED. SB-7 MAY BE REMOVED.
PVC ENI
PVC
PERSPECTIVE VIEW
END VIEW
"C" ENCLOSURE
,TFP FNTPY IINIT
PVC VFNT
FRONT VIEW
FAIRCLOTH SKIMMER
NOT TO SCALE
PIEDMONT
L I T H I U
cr u�ni 11 E 40
LE FOR
METER
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
SLATE
5
0
7
Basin
Drainage Area
Proposed Depth
(ft)
Cleanout Depth
(Ft)
Depth of Flow
over Spillway(ft)
Skinner Size
(in)
Actual Orfice
Diameter (in)
Riser Diameter
(In)
Barrel
Diameter (in)
Approx.Bottom
Length (ft)
Approx. Bottom
Width (ft)
Approx. Top
Length (ft)
Approx. Top
Width (ft)
Sediment Storage
Required (cf)
Sediment Storage
Provided (cf)
Surface Area
Required (sf)
Surface Area Provided
(sf)
Emergency
Spillway Size (L)
Riser Base
Width (ft)
Riser Base
Length (ft)
Riser Base
Depth (ft)
7
7.55 ac
1.80
0.9
0.2
6.0
1.75
72
24 x 2
242
60
266
86
13,590
30,240
16,119
18,130
20
7.0
7.0
1.5
INSTALL COLLAR WITH
CORRUGATIONS VERTICAL.
COLLAR TO BE OF SAME
GAGE AS THE PIPE WITH
WHICH IT IS USED.
I I I I I I I I I I I I I I
I I I I I I I I I I I I I
I I I I I I I I I I I I I
IIIIIIIIIIIIIIIIIIIIII1 II
I I I I I I I I I I I I
IIIIIIIIIII III I IIII
(IIIIIIII IIIIIIII
IQ I i01 1 101 I� 1 101 10
1� 1 101 1 101 Q 1 101 1 101
I�I�I�III II�I�I�I
I I I I I I I I I I I
I I I I I I I I I I I
111111111111111111111111 I
11111111111111111111111111
I I I I I I I I I I I I I I
W
ANTI -SEEP COLLARS
NOT TO SCALE
1 /2" X 2" SLOTTED
HOLES @ 8" C.C.
FOR 3/8"0 BOLTS
OD OF PIPE
ONE PIECE CONNECTING
BAND WELDED TO PIPE;
CONTINUOUS WELD BOTH
SIDES OF BAND
CONSTRUCTION, MAINTENANCE AND INSPECTION NOTES
1. INSPECT SEDIMENT BASINS AT LEAST WEEKLY AND AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER)
RAINFALL EVENT AND REPAIR IMMEDIATELY.
2. REMOVE SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL DIMENSIONS WHEN IT ACCUMULATES
TO ONE-HALF THE DESIGN DEPTH. PLACED REMOVED SEDIMENT IN AN AREA WITH SEDIMENT
CONTROLS.
3. CHECK EMBANKMENT, SPILLWAYS, AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE
EMBANKMENT FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY REPAIRS IMMEDIATELY. REMOVE
ALL TRASH AND OTHER DEBRIS FROM THE RISER AND POOL AREA.
4. MSL = MEAN SEA LEVEL
TOP OF BERM
4 VARIES 4
1 (SEE TABLE 1) 1
NOTES:
1. EMERGENCY SPILLWAY IS GRASS LINED. WIDTH
(SEE TABLE 1)
EMERGENCY SPILLWAY
NOT TO SCALE
TRASH RACK, SEE -
DETAIL THIS SHEET
RISER STRUCTURE
SKIMMER, SEE
DETAIL THIS SHEET
RETRIEVAL ROPE
ANCHORED IN—\
THE SLOPE
SEDIMENT
CLEANOUT�
GAGE
CREST ELEVATION
SEDIMENT
CLEANOUT
MARK w
1
3
Q
PROJECT MANAGER V. HAYNES
1_kPE
BARREL
20'
CONCRETE BASE
SKIMMER. SEE
DETAIL THIS SH
1" STAIN(
STEELS(
FLEXIBLE COU
WITH TRANSITI(
10' TOP OF SKIMMER PIP
BERM WIDTH EMERGENCY SPILLWAY, SEE
DETAIL THIS SHEET
TOP OF BERM
EMBANKMENT STABILIZED
WITH VEGETATION
3 OUTLET APRON
ANTI —SEEP COLLAR
EVERY SEE DETAIL THIS SHEET
20'
SEDIMENT RISER BASIN
NOT TO SCALE
TRASH RACK DETAIL
NOT TO SCALE
NOTES:
1. ALL PVC PIPES ARE TO BE SCHEDULE 40 UNLESS OTHERWISE NOTED.
2. ALL JOINTS OF THE FLOATATION SECTION SHALL BE SOLVENT WELDED.
JOINTS OF SKIMMER SECTION NEED NOT BE WATER —TIGHT.
3. HDPE FLEXIBLE DRAIN PIPE IS TO BE ATTACHED TO THE PIPE BARREL
STRUCTURE WITH WATER —TIGHT CONNECTIONS.
4. SEE SCHEDULE FOR ORIFICE SIZE.
5. FAIRCLOTH TYPE OR EQUIVALENT SKIMMER TO BE USED.
6. INSTALL ANTI —VORTEX PLATE IN RISER STRUCTURE.
OUTLET STRUCTURE ENLARGEMENT
NOT TO SCALE
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 79
PLAN VIEW & PROFILE DETAIL
FILENAME - OOC-10
SCALE - 1" = 50'
SHEET
10 OF 18
0
C
0

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
C A RO
0 002
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN NO. 89
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-11
SCALE I - 1" = 50'
SHEET
11 OF 18

PIEDMONT
LITHIUM
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CAA C A
0 002
N P o`� g/27/20Z 1
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
STREAM CROSSING NO. 1,
ROAD TO PLANT AREA
FILENAME I - OOC-12
SCALE I - 1" = 20'
SHEET
12 OF 18

PIEDPAONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
STREAM CROSSING NO. 2,
RAIL TO PLANT AREA
FILENAME I - OOC-13
SCALE I - 1" = 20'
SHEET
13 OF 18

1
2
3
5
0
7
z
co
J
O
NATURAL GRADE
W2
3
�i�u yr rlrrwi�
PI AN
MIN.
ELEVATION TYPE 2 GEOTEXTILE FILTER
FABRIC LAP (IF NEEDED)
RIP RAP
T (THICKNESS)
NOTE: -40=LAYER OF TYPE 2
MINIMUM H=2/3 PIPE DIAMETER GEOTEXTILE FILTER FABRIC
NOTES:
1. CLASS OR MEDIAN SIZE OF RIPRAP AND LENGTH, WIDTH AND DEPTH OF APRON TO BE
SHOWN ON EROSION CONTROL PLANS.
2. RIPRAP SHOULD EXTEND UP BOTH SIDES OF THE APRON AND AROUND THE END OF THE
PIPE OR CULVERT AT THE DISCHARGE OUTLET AT A MAXIMUM SLOPE OF 2:1 AND A HEIGHT
NOT LESS THAN TWO THIRDS THE PIPE DIAMETER OR CULVERT HEIGHT.
3. THERE SHALL BE NO OVERFLOW FROM THE END OF THE APRON TO THE SURFACE OF THE
RECEIVING CHANNEL. THE AREA TO BE PAVED OR RIPRAPPED SHALL BE UNDERCUT SO
THAT THE INVERT OF THE APRON SHALL BE AT THE SAME GRADE (FLUSH) WITH THE
SURFACE OF THE RECEIVING CHANNEL. THE APRON SHALL HAVE A CUTOFF OR TOE WALL
AT THE DOWNSTREAM END.
4. THE WIDTH OF THE END OF THE APRON SHALL BE EQUAL TO THE BOTTOM WIDTH OF THE
RECEIVING CHANNEL. MAXIMUM TAPER TO RECEIVING CHANNEL 5:1
5. ALL SUBGRADE FOR STRUCTURE TO BE COMPACTED TO 95% MAXIMUM DRY DENSITY PER
ASTM D-1557 OR GREATER.
6. THE PLACING OF FILL, EITHER LOOSE OR COMPACTED IN THE RECEIVING CHANNEL SHALL
NOT BE ALLOWED.
7. NO BENDS OR CURVES IN THE HORIZONTAL ALIGNMENT OF THE APRON UNLESS
OTHERWISE SHOWN.
8. TYPE 2 GEOTEXTILE FILTER FABRIC SHALL BE INSTALLED ON COMPACTED SUBGRADE
PRIOR TO PLACEMENT OF RIPRAP AND TRIMMED AFTER RIPRAP PLACEMENT SO THAT NO
FABRIC IS VISIBLE.
9. FOR PIPE 2 RIP RAP OUTLET PROTECTION, THE DIMENSIONS BELOW ARE A MINIMUM
REQUIREMENT. SHAPE RIPRAP AS SHOWN ON SHEET BUKOC-CV-C-GR.PL-01.
RIPRAP OUTLET PROTECTION
NOT TO SCALE
P I E DAAON T
PROVIDE A MINIMUM OF THREE
POROUS BAFFLES PER SKIMMER
SEDIMENT TRAP
F/0w
low
PROVIDE A MINIMUM 8' WIDE x 16
LONG CLASS 1 RIP -RAP 15" DEEP ON
LAYER OF NON -WOVEN GEOTEXTILE
FABRIC (MIRAFI 140N OR APPROVED
EQUAL) AT DITCH CONVEYANCE
DROP ENTRY POINTS INTO THE
SEDIMENT TRAPS.
MAINTENANCE NOTES
INLET ZONE 35% FIRST CHAMBER 25%
OF SURFACE AREA OF SURFACE AREA
SECOND CHAMBER 25%
OF SURFACE AREA
_ OUTLET ZONE 15%
/OF SURFACE AREA
5'STEEL
(TYPICAL)
4'-0" MAX SPACING
FLOW
8"DX6"W TRENCH
BACKFILL AND COMPACT
FENCE AND FABRIC
BURIED IN TRENCH
1. INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED REPAIRS IMMEDIATELY.
2. BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE,
REPLACE IT PROMPTLY.
3. REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL, TO PROVIDE ADEQUATE STORAGE VOLUME FOR THE NEXT RAIN AND TO REDUCE
PRESSURE ON THE BAFFLES.
4. TAKE CARE TO AVOID DAMAGING THE BAFFLES DURING CLEANOUT, AND REPLACE IF DAMAGED.
5. DURING CLEANOUT OPERATIONS. SEDIMENT DEPTH SHOULD NEVER EXCEED HALF THE DESIGNED STORAGE DEPTH.
6. AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE ALL BAFFLE MATERIALS AND UNSTABLE SEDIMENT
DEPOSITS, BRING THE AREA TO GRADE, AND STABILIZE IT
GENERAL NOTES:
1. BAFFLE FABRIC SHALL CONSIST OF 700 G/M COIR EROSION CONTROL BLANKET OR APPROVED SUBSTITUTE.
A SINGLE CONTINUOUS LENGTH OF FABRIC SHALL EXTEND ACROSS THE FULL WIDTH OF THE BASIN.
2. POSTS SHALL BE STEEL, MINIMUM 5 FEET LONG, AND OF THE SAME GENERAL TYPE AS THOSE SPECIFIED FOR SILT FENCE CONSTRUCTION.
3. THE TOP EDGE OF THE BAFFLE FABRIC SHALL BE SUPPORTED BY A TENSIONED CABLE OR ROPE EXTENDING ACROSS THE WIDTH OF THE BASIN
AND ANCHORED ON EACH END.
4. THE BOTTOM EDGE OF THE BAFFLE FABRIC SHALL BE EMBEDDED IN A TRENCH EXCAVATED ALONG THE BASIN BOTTOM AND SIDE SLOPES.
5. BAFFLE FABRIC SHALL BE ATTACHED TO SUPPORT POSTS WITH HEAVY-DUTY PLASTIC CABLE TIES, OR SIMILAR MEANS.
6. BAFFLES SHALL BE SPACED IN THE DIRECTION OF FLOW TO PROVIDE THE SURFACE AREAS SHOWN.
7. THE BASIN SLOPES SHALL BE SEEDED AND THE SLOPES SHALL BE MATTED IMMEDIATELY AFTER THE BASIN IS CONSTRUCTED.
8. SEE THIS SHEET FOR ADDITIONAL BASIN INFORMATION.
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
POROUS BAFFLES
NOT TO SCALE
6-FT WIRE FENCE
NOT TO SCALE
1
PROJECT MANAGER V. HAYNES
/ C\
00
�t
N
O
M
N
MIN. 14 GAUGE GALVANIZED WIRE -
FENCE WITH MAX. 6" MESH SPACING
4%4" REINFORCED
SAFETY POST CAP
(TYP. ALL POSTS)
M N
O
F_
00
z
00 -
N
NOTE:
1. SILT FENCE IS TO BE SECURELY FASTENED TO EACH
STEEL SUPPORT POST OR TO WOVEN WIRE FENCE WHICH
IS IN TURN IS ATTACHED TO THE STEEL FENCE POST.
2. INSPECT FREQUENTLY AND REPAIR OR REPLACE
PROMPTLY AS NEEDED.
3. REMOVE SEDIMENT DEPOSITED AS NEEDED TO PROVIDE
STORAGE VOLUME FOR THE NEXT RAIN AND TO REMOVE
PRESSURE ON THE SILT FENCE. UNIFORMLY DISTRIBUTE
ON THE SOURCE AREA PRIOR TO TOPSOILING.
4. ALTERNATIVELY, THE CONTRACTOR MAY USE EXTRA
STRENGTH SILT FENCE FABRIC WITHOUT WIRE FENCE.
MAXIMUM SPACING BETWEEN POST SHALL BE 6-0".
NOTE:
8'-0" MAXIMUM
8" DOWN & 4" FORWARD
ALONG THE TRENCH
FRONT VIEW
4%4" REINFORCED
SAFETY POST CAP
(TYP. ALL POSTS)
SILT FENCE
NOT TO SCALE
co
It
N
N
O
H
00
1- - z
00
1. SEE PROJECT SPECIFICATIONS FOR DITCH LINING
REQUIREMENTS.
TYPICAL DITCH SECTION
NOT TO SCALE
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SYNTHETIC FILTER FABRIC
(CERTIFIED TO MEET THE
REQUIREMENTS OF ASTM D 6461)
5' PAINTED OR
GALVANIZED STEEL POST
(1.25 LB/LF)
ATTACH TO POSTS WITH
>KlvWIRE OR PLASTIC ZIP TIES
(MIN. 50 LBS TENSILE STRENGTH)
r--- GRADE
5' PAINTED OR
GALVANIZED STEEL POST
(1.25 LB/LF)
MIN. 14 GAUGE GALVANIZED WIRE
FENCE WITH MAX. 6" MESH SPACING
SYNTHETIC FILTER FABRIC
(CERTIFIED TO MEET THE
REQUIREMENTS OF ASTM D 6461)
TRENCH IN SILT FENCE.
BACKFILL AND COMPACT
THOROUGHLY AFTER PLACEMENT.
FLOW
4" MIN.
SIDE VIEW
GRADE
EROSION CONTROL DETAILS
FILENAME - OOC-14
SCALE - N.S.
SHEET
14 OF 18
0

1
2
3
CONSTRUCTION NOTES
2
5
1.1
7
GENERAL EROSION CONTROL NOTES
1. THE CONTRACTOR SHALL INSTALL ALL EROSION AND SEDIMENTATION CONTROL MEASURES AND
DEVICES NECESSARY TO COMPLY WITH THE STANDARDS AND SPECIFICATIONS OF THE NORTH
CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY (NCDEQ) AND APPLICABLE STATE AND LOCAL
LAWS AND ORDINANCES, AND PREVENT STANDING WATER WITHIN PROJECT LIMITS, UNLESS
OTHERWISE DIRECTED.
2. INSTALL CONSTRUCTION ENTRANCES AND ACCESS ROADS IN ACCORDANCE WITH STATE
STANDARDS AND WITH MINIMAL DISTURBANCE TO SURROUNDING VEGETATION AND TREES.
CONTRACTOR SHALL RECEIVE PRIOR APPROVAL FROM ENGINEER BEFORE TREE REMOVAL FOR
ACCESS ROAD CONSTRUCTION. WITHIN 30 DAYS AFTER CONSTRUCTION IS COMPLETED FOR WHICH
ACCESS ROAD IS USED, AND UNLESS OTHERWISE APPROVED, CONTRACTOR SHALL REMOVE ALL
REMNANTS OF THE ACCESS ROADS AND RETURN AREA TO AS GOOD AS OR BETTER CONDITION.
ADDITIONAL MEASURES TO CONTROL EROSION AND SEDIMENT MAY BE REQUIRED BASED ON
CONTRACTOR'S PRACTICES AND WILL BE EMPLOYED WHERE DETERMINED NECESSARY BY ACTUAL
SITE CONDITIONS.
3. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLE OR SITE ONTO PUBLIC
ROADWAY OR INTO STORM DRAIN MUST BE REMOVED.
4. ALL DITCH LINES DISTURBED DURING CONSTRUCTION SHALL BE STABILIZED BY THE CONTRACTOR.
ON ALL NEW OR DISTURBED, UNPAVED DITCHES INSTALL A SOIL STABILIZATION MEASURES AS
APPROPRIATE AND IN ACCORDANCE WITH PROJECT SPECIFICATIONS.
5. PROVIDE SILT FENCE ADJACENT TO DITCHES AND AT THE TOE OF FILL SLOPES. ALSO, PROVIDE
ADEQUATE MEASURES IN AREAS WHERE NATURAL VEGETATION DOES NOT PROVIDE A SUFFICIENT
BUFFER AND AS DIRECTED BY THE ENGINEER.
6. PROVIDE INLET SEDIMENT FILTER AT ALL NEW STORM INLETS. INLET PROTECTION MAY BE REQUIRED
AT EXISTING INLETS IN THE EVENT SEDIMENT WILL RUN DOWNSTREAM TO AN EXISTING INLET.
7. PRIOR TO COMMENCING LAND DISTURBANCE ACTIVITY:
a. THE LIMITS OF LAND DISTURBANCE SHALL BE CLEARLY AND ACCURATELY DEMARCATED WITH
STAKES, FENCING, OR OTHER APPROPRIATE MEANS. THE LOCATION AND EXTENT OF ALL
AUTHORIZED LAND DISTURBANCE ACTIVITY SHALL BE DEMARCATED FOR THE DURATION OF THE
CONSTRUCTION ACTIVITY. NO LAND DISTURBANCE SHALL OCCUR OUTSIDE THE APPROVED
LIMITS INDICATED ON THE APPROVED PLANS.
b. ALL TREE PROTECTION FENCING SHALL BE INSTALLED, INSPECTED AND APPROVED BY THE
INSPECTOR. TREES WITHIN THE PROTECTION AREAS MAY ONLY BE REMOVED WITH APPROVAL
BY THE INSPECTOR.
8. COMPLY WITH THE FOLLOWING CONSTRUCTION SEQUENCE FOR EACH CONSTRUCTION PHASE:
a. GRUBBING SHALL BE PERFORMED DURING PREDICTED PERIODS OF DRY WEATHER.
b. EROSION CONTROL DEVICES AND STORMWATER MANAGEMENT DEVICES SHALL BE INSTALLED
PRIOR TO ANY OTHER CONSTRUCTION AND WITHIN 24 HOURS OF GRUBBING. THIS MAY REQUIRE
GRUBBING IN STAGES TO ENSURE EROSION CONTROL MEASURES ARE PUT IN PLACE PRIOR TO
RAIN EVENT. THE LOCATION OF SOME OF THE EROSION CONTROL DEVICES MAY HAVE TO BE
ALTERED FROM THAT SHOWN ON THE APPROVED PLANS IF DRAINAGE PATTERNS DURING
CONSTRUCTION ARE DIFFERENT FROM THE FINAL PROPOSED DRAINAGE PATTERNS. IT IS THE
CONTRACTOR'S RESPONSIBILITY TO ACCOMPLISH EROSION CONTROL FOR ALL DRAINAGE
PATTERNS CREATED AT VARIOUS STAGES DURING CONSTRUCTION. ANY DIFFICULTY IN
CONTROLLING EROSION DURING ANY PHASE OF CONSTRUCTION SHALL IMMEDIATELY BE
REPORTED TO THE ENGINEER.
c. SILT FENCE SHALL BE INSTALLED WITHIN 24 HOURS OF GRUBBING. THE CONTRACTOR SHALL
REMOVE ACCUMULATED SILT WHEN THE SILT IS WITHIN 12" OF THE TOP OF THE SILT FENCE
UTILIZED FOR EROSION CONTROL.
9. THE CONSTRUCTION OF THE SITE WILL COMMENCE WITH INSTALLATION OF EROSION CONTROL
MEASURES SUFFICIENT TO CONTROL SEDIMENT DEPOSITS AND EROSION. ALL SEDIMENT CONTROL
WILL BE MAINTAINED UNTIL ALL UPSTREAM GROUND WITHIN THE CONSTRUCTION AREA HAS BEEN
COMPLETELY STABILIZED WITH PERMANENT VEGETATION.
10. FAILURE TO INSTALL, OPERATE OR MAINTAIN ALL EROSION CONTROL MEASURES WILL RESULT IN
ALL CONSTRUCTION BEING STOPPED ON THE JOB SITE UNTIL SUCH MEASURES ARE CORRECTED TO
NORTH CAROLINA EROSION AND SEDIMENT CONTROL REGULATIONS.
11. A COPY OF THE APPROVED LAND DISTURBANCE PLAN AND PERMIT SHALL BE PRESENT ON THE SITE
WHENEVER LAND DISTURBANCE ACTIVITY IS IN PROGRESS.
12. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND ANY DEFICIENCIES
NOTED WILL BE CORRECTED BY THE END OF EACH DAY. ADDITIONAL EROSION AND SEDIMENT
CONTROL MEASURES WILL BE INSTALLED IF DEEMED NECESSARY BY ON -SITE INSPECTION.
13. ON -SITE STOCKPILING OF SOIL IS ALLOWED WITHIN THE LIMITS OF DISTURBANCE SUBJECT TO
PLACING APPROPRIATE EROSION CONTROL DEVICES TO PREVENT SOIL LOSS DURING RAIN EVENTS.
LOCATIONS SHALL BE PRE -APPROVED BY THE INSPECTOR.
14. PROVIDE NOTIFICATION TO ALL AFFECTED PROPERTY OWNERS PRIOR TO CONSTRUCTION, AS
APPLICABLE.
15. ANY OFF -SITE BORROW AND WASTE REQUIRED FOR THIS PROJECT MUST COME FROM A SITE WITH
AN APPROVED EROSION CONTROL PLAN, A SITE REGULATED UNDER THE MINING ACT OF 1971, OR A
LANDFILL REGULATED BY THE DIVISION OF SOLID WASTE MANAGEMENT. TRASH/DEBRIS FROM
DEMOLITION ACTIVITIES OR GENERATED BY ANY ACTIVITIES ON SITE MUST BE DISPOSED OF AT A
FACILITY REGULATED BY THE DIVISION OF SOLID WASTE MANAGEMENT OR PER DIVISION OF SOLID
WASTE MANAGEMENT OR DIVISION OF WATER RESOURCES RULES AND REGULATIONS. [15A NCAC 413
.0110]
MINIMUM 12" #57
WASHED STONE ON FACE
/---SEDIMENT STORAGE
VOLUME ­7
2'X2' KEYWAY
2' KEYWAY
GEOTEXTILES
P I E DAAON T
r
✓�r
MINIMUM
8 OZ./SY NON -WOVEN
EROSION MAINTENANCE REQUIREMENTS
1. SEDIMENT FENCE (SILT FENCE):
a. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND IMMEDIATELY FOLLOWING A RAIN
EVENT WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD. MAKE ANY REQUIRED REPAIRS BY
THE END OF EACH DAY.
b. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE, OR BECOME
INEFFECTIVE, REPLACE IT PROMPTLY.
c. REMOVE SEDIMENT DEPOSITS AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR
THE NEXT RAIN AND TO REDUCE PRESSURE ON THE FENCE.
d. TAKE CARE TO AVOID UNDERMINING THE FENCE DURING CLEAN OUT.
e. REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT DEPOSITS AND BRING THE AREA TO
GRADE. STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY
STABILIZED.
2. WATTLES:
a. INSPECT CHANNELS FOR DAMAGE IMMEDIATELY FOLLOWING A RAIN EVENT WHICH EXCEEDS 1.0
INCHES IN A 24-HOUR PERIOD.
b. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE WATTLE AND EROSION FROM HIGH
FLOWS AROUND THE EDGES OF THE WATTLE. CORRECT ALL DAMAGE IMMEDIATELY. IF
SIGNIFICANT EROSION OCCURS BETWEEN WATTLES, INSTALL A PROTECTIVE RIPRAP LINER IN
THAT PORTION OF THE CHANNEL.
c. REMOVE SEDIMENT ACCUMULATED BEHIND THE WATTLES AS NEEDED TO PREVENT DAMAGE TO
CHANNEL VEGETATION, ALLOW THE CHANNEL TO DRAIN THROUGH THE STRAW WATTLE AND
PREVENT LARGE FLOWS FROM CARRYING SEDIMENT OVER THE WATTLE.
3. TEMPORARY GRAVEL CONSTRUCTION ENTRANCE/EXIT:
a. INSPECT ON LEAVING THE CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING
WITH 2-INCH STONE. AFTER EACH RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP
SEDIMENT AND CLEAN IT OUT AS NECESSARY. IMMEDIATELY REMOVE ALL OBJECTIONABLE
MATERIALS SPILLED, WASHED, OR TRACKED ONTO PUBLIC ROADWAYS.
4. ROCK OUTLET PROTECTION:
a. INSPECT STONE ARRANGEMENT EVERY 7 CALENDAR DAYS AND IMMEDIATELY FOLLOWING A RAIN
EVENT WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD.
b. MAINTAIN SPECIFIED DIMENSIONS AND REMOVE SEDIMENT BUILDUP WHEN THE SEDIMENT LEVEL
IS'/z THE HEIGHT OF THE ROCKS.
5. INLET PROTECTION:
a. INSPECT STONE ARRANGEMENT EVERY 7 CALENDAR DAYS AND IMMEDIATELY FOLLOWING A RAIN
EVENT WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD.
b. REPLACE STONE AS NEED TO MAINTAIN SPECIFIED DIMENSIONS
c. REMOVE SEDIMENT BUILDUP WHEN THE SEDIMENT LEVEL IS'/,. THE HEIGHT OF THE ROCKS.
TAKE CARE NOT TO DAMAGE OR UNDERCUT THE WIRE MESH DURING SEDIMENT REMOVAL
6. TEMPORARY DIVERSIONS:
a. INSPECT EVERY 7 CALENDAR DAYS AND IMMEDIATELY FOLLOWING A RAIN EVENT WHICH
EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD. REMOVE SEDIMENT FROM THE FLOW AREA AND
REPAIR THE DIVERSION RIDGES. ALSO CHECK AND MAINTAIN OUTLETS.
b. WHEN THE PROTECTED AREA IS PERMANENTLY STABILIZED, REMOVE THE RIDGES AND THE
CHANNEL TO BLEND WITH THE NATURAL GROUND LEVEL AND APPROPRIATELY STABILIZE SITE.
7. CHECK DAM:
a. INSPECT CHECK DAMS AND CHANNELS FOR DAMAGE IMMEDIATELY FOLLOWING A RAIN EVENT
WHICH EXCEEDS 1.0 INCHES IN A 24-HOUR PERIOD.
b. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE CHECK DAM AND EROSION FROM HIGH
FLOWS AROUND THE EDGES OF THE DAM. CORRECT ALL DAMAGE IMMEDIATELY. IF SIGNIFICANT
EROSION OCCURS BETWEEN DAMS, INSTALL A PROTECTIVE RIPRAP LINER IN THAT PORTION OF
THE CHANNEL.
c. REMOVE SEDIMENT ACCUMULATED BEHIND THE DAMS AS NEEDED TO PREVENT DAMAGE TO
CHANNEL VEGETATION, ALLOW THE CHANNEL TO DRAIN THROUGH THE STONE CHECK DAM AND
PREVENT LARGE FLOWS FROM CARRYING SEDIMENT OVER THE DAM. ADD STONES TO DAMS AS
NEEDED TO MAINTAIN DESIGN HEIGHT AND CROSS SECTION.
U-
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N
CLASS A OR B EROSION
CONTROLSTONE
OUTLET
PROTECTION
SEDIMENT TRAP DETAIL
NOT TO SCALE
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
SUPPORT ROPE Tn 411
TO PREVENT SAGGING
700 g/m2 COIR EROSION
BLANKET, COIR MESH OR SIMILAR,
TRENCHED INTO BOTTOM OR SIDE
SECTION A -A'
INLET
OUTLET
PLAN
PROJECT MANAGER V. HAYNES
BOTTOM OR SIDE
" INITn
�I STAKE TO SUPPORT WIRE
•'•••.... •
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TEMPORARY STREAM CROSSING CONSTRUCTION DETAIL
APPROACHTIMBER MAT
STREAM
TEMP
./
•RARY
BRIDGE CROSSING
STREAM
CHANNEL
TIMBER MAT
PERSPECTIVE VIEW
TIMBER MAT
APPROACH\
SURFACE FLOW
DIVERSION TO
TRAP
INSTALL
SIDEBOARDS OR
COMPOST FILTER
SOCKS, OR OTHER
MATERIAL TO
PREVENT
SEDIMENT FROM
EXITING THE
TEMPORARY
SIDES THE
SPAN
BRIDGE.. /
BRIDGE
CROSSING
STREAM BED ---
LONGITUDINAL SECTION
SURFACE FLOW
DIVERSION TO
TRAP
1. TO BE USED FOR TEMPORARY ACCESS DURING CONSTRUCTION ONLY.
2. EROSION AND SEDIMENT CONTROL MEASURES, AS SHOWN ON PLANS AND SPECIFIED BY NCDEQ,
MUST BE IMPLEMENTED PRIOR TO INSTALLATION OF A TEMPORARY CROSSING.
3. TEMPORARY CROSSINGS SHALL BE REMOVED AFTER PERMANENT CROSSINGS ARE COMPLETE.
MAINTENANCE:
• TEMPORARY STREAM CROSSINGS SHALL BE INSPECTED ON A DAILY BASIS.
• DAMAGED CROSSINGS SHALL BE REPAIRED WITHIN 24 HOURS OF THE INSPECTION AND BEFORE ANY SUBSEQUENT USE.
• SEDIMENT DEPOSITS ON THE CROSSING OR ITS APPROACHES SHALL BE REMOVED WITHIN 24 HOURS OF THE INSPECTION.
• AS SOON AS THE TEMPORARY CROSSING IS NO LONGER NEEDED, IT SHALL BE REMOVED. ALL MATERIALS SHALL BE
DISPOSED OF PROPERLY AND DISTURBED AREAS STABILIZED.
• GEOTEXTILE FABRIC TO BE WRAPPED AROUND UNDERSIDE OF TEMPORARY SPAN BRIDGE.
SEDIMENT TRAP SIZING
SEDIMENT
TRAP NO.
DRAINAGE
AREA (ac.)
Q25
(cfs)
REQUIRED
SURFACE AREA (sf)
REQUIREDSTORAGE
VOLUME (cf)
PROVIDED
SURFACE AREA (sf)
PROVIDED STORAGE
VOLUME (cf)
ST-1
0.50
2.45
1,067
1,800
1,355
2,190
ST-2
0.40
1.96
854
1,440
1,088
1,713
ST-3
0.65
3.19
1 1,388
2,340
1,640
2,704
ST-4
1.50
7.36
3,202
5,400
3,296
5,762
ST-5
1.75
8.59
3,736
6,300
3,966
7,018
ST-6
1.50
7.36
3,202
5,400
3,296
5,762
ST-7
0.70
3.44
1,494
2,520
1,640
2,704
ST-8
0.80
3.93
1,708
2,880
11808
3,010
ST-9
1.50
7.36
3,202
5,400
3,296
5,762
ST-10
2.25
11.04
4,804
8,100
41821
8,631
ST-11
0.60
2.94
1,281
2,160
1,640
2,704
ST-12
0.80
3.93
1,708
2,880
11808
3,010
ST-13
1.15
5.64
2,455
4,140
2,670
4,596
ST-14
0.50
2.45
1,067
1,800
1,640
2,704
ST-15
0.25
1.23
534
900
621
902
ST-16(Ph 1)
2.80
13.74
5,978
10,080
6,071
10,712
ST-17(Ph1)
1.60
7.85
3,416
5,760
3,966
7,018
ST-18 (Phi)
1 0.50
2.45
1,067
1 1,800
1,224
1 1,826
ST-19 (Ph 1)
1 3.20
15.71
6,832
1 11,520
7,059
1 12,637
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
EROSION CONTROL NOTES
FILENAME I - OOC-15
SCALE I - N.S.
SHEET
15 OF 18
Ic
0

PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
ROAD PROFILE
FILENAME I - OOC-16
SCALE I - 1" = 100'
SHEET
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PIEDMONT
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
�,A CAR()
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
RAIL PROFILE 1
FILENAME I - OOC- 17
SCALE I - 1" = 100'
SHEET
17 OF 18

P I E D/�AON T
L I T H I U
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
N ••CA
.�,.aFEss� • �i�
v•
0 002
G;
���nnuu�`��
PIEDMONT LITHIUM CAROLINAS, INC.
CAROLINA LITHIUM PROJECT
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
RAIL PROFILE 2
FILENAME I - OOC-18
SCALE I - 1" = 100'
SHEET
18 OF 18