Appendix G.4

Piedmont Lithium Carolinas, Inc. I Response to DEMLR Additional Information Request
Appendix G Response to DEMLR Mooresville Regional Office Comments
4 Lithium Hydroxide Conversion Plant
Drawings

1 2 3 4 5 6 7
7—
IN
_ \� 11I �� ��1 II O ✓ �� I / 1 j \\ URCH
I I I l I / -
��� — / I I I I I I I // - o���/i - 4 l
I r I III I / i
/ 1 IIII
I goy <
GoA
\\\ \\\\ III II II I CONCRETE
I) J / / /� �`_ �) 1 \ 1 \ 00 cb�b % / ` \\\ \\\ \ ��/ r
)) I l / J / ��� �\ // I I I 1 1 j 11 WASHOUT �-
I 11 �/ � �/�/� /-— —� /� • 11 , f �. , �11� — ) � \` �\ � \ i i/ / �100
_
CONSTRUCTION \�
1 1
237
— 99 ST 1 �h
8 ENTRANCE , � � \ \ \ I � � / /
Lu
WETLAND AREA 3
1 1 �/ /.� ,-- _ / �� , / / +� ♦ ♦ 1 f t \\��\\ \ I I II 0.09 ACRES i \ \ 1 N--
WETLAND AREA 2 % / j �, �11 ♦ 1 \ \�\\\\II I 1 ��� III \ I/ 1 i �' I / \,� 1 �1 �� �� —
1 0.01 ACRES
10 CONSTRUCTION �ST-222 �f ♦ ( I A �� 1 - -I a -
j STAGING AREA 1 \ f+
0�` CONCRETE I \\
� WASHOUT 1 `„�.
X 11
\ \ x x ST-223 x+' �� 1 X� 8
/ APPROX. 2 ACRES �x- x-x-x-x-x—x—xiLj
\ \\
�\ CSX RAIL RIGHT-OF-WAY x x I I I �� ♦ X - \ I 1 \ \ 8�6 \
CONSTRUCTION ♦ X � �,�,�' ST-227 . • 1k �— �• STAGING AREA 2 ♦ x
911 � XI44rf'
ST-236 �� APPROX. 6 ACRES X ° ��, i M, 0
WETLAND AREA 4 ,,
�'' � ° ¢ 0 06 ACRES a
913` / J
-909-
907\
100
oLQ
X 8d, �♦ �� ST-225 `� SB-208 X ° V �� / I
f �� ♦ i X
a ,Mo X x w ` +` /� `� ° �° /
A.
X
♦ miter r•xcaZ 1 ♦ \ O /
iiiijill,lllllllll♦ /1
v 1
X CONSTRUCTION �♦ ° ♦ � -� ! � X � ♦
' S
AGING AREA 4 - ♦ y \ x
X PROX. 6 ACRES♦� ,, \ �` \ `� �� +—x —x —x —x x —x —x —x —x —x x —x — x —x —x —x —x —x ,
x,x\♦ X +�♦ ♦ y�+ �- k-;fix-x—x—x—x—x—x—x— ;x—x— -xX 864
x+ xxk + . - f��♦ V.
+t ��.+ �► ��
x ♦0100 At a +`♦ ♦ yam. k CONSTRUCTION
+` ♦�` �� ��f ST-239 a STAGING AREA 3
X - -_.a ; + ♦y. ,moo o APPROX. 2 ACRES '`
x
/�/lI III II �
- o + SB-207 *� I I I I I 0Lr
x WETLAND AREA 1 ,+♦y , \A+ I
X 11 1 l
X 0.52 ACRES ♦ �..i,:, ,, X� X
� I
% � ��♦ i �', � x— x— x— x— x— x— x— x— x— x— x—
T
ST-240 ♦ ° �t
cA
� A�y��_ �,�,---- �X � f� '� \ \\ cA�
_X EXISTING CEMETERY SITE } ++ �►--'��I V 6'� \ VA
1 / } + ♦f ( \ \ \ �6` \ ��
_ —
u
�A
STREAM CROSSING N �
S
x- C OSS G O 3
x x -x ', x ' ♦ �� ♦+ SEE SHEET 14 �}
_x- f 8
x x_ x x K ♦ �` i \\ �x x- P x 1 \ y�� }++� , �` fx SB-201 \\\ \ \\cp \ \ 68'
-w,_ X \
\ -
0 "YARD
NO �S - � lama �J�� PA,
X �
\ \
50 CEMETERY SITE BUFFER �!
+ \ X °° ♦ ��> } \ 11 \ \ 6> °
w ♦ . . X \\
�1\ V -
- ;1 ♦ SB-205 _ i � \
°
r► 1 ♦, "'
}
\\ • \�s�
1 f .. ♦ IIII\��\
o x +. A *+ x
30' STREAM BUFFER (TYP)-
-� \
s.
$_ / ♦ f , j X, III II I I
_x_
-X_ x�- ♦ � � � �.SVTr -23- �0- ST-234 -xXX
I �IIII I I II I I
I I
dW' �
-x_835►, � SB-202
� %834x�ST-231 �\
8�6\
SB-206 -,_ ,♦ y — � SB-209 , \ I I � �� \ �- °
-A ��' J� 843 . \A = 0 o
1 _
x 4 `��� , +x� x x— x— x— x— x— x— x— x— x— x— x— x— x, STREAM CROSSING NO. -' 82$
I I�1° x,x,x\x SEE SHEET 15 ��ko(9" �, X Ap 0
0
j
PIEDMONT
LITHIUM
---- x\ x\ x` -MAW
X ST-232 ST-235
B90
4 o k
}
}
}
EXISTING CEMETERY SITE
/
-1
50' CEMETERY SITE BUFFER }}
SUBJECT PROPERTY LINE (TYP)
/
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
WETLAND AREA 5
0.11 ACRES
PROJECT MANAGER V. HAYNES
I00
X
X III o X
SB-204 —4I�� �� ♦ X
x
X
X
i,
f � i co, ♦ �
X
1 i X t X
X 820 If X
X 100 YEAR FLOOD ZONE
' - ST-225
X �► X— x
f x-x x-x, ��1� }+ SB-203 X }
--
x-x -x -x x,+
�_:SS/o
�� SEAL
032062
J
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
CONVEYOR TO MINE, BY OTHERS
X
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
n
01
200 0 200 400
SCALE IN FEET
GENERAL NOTES:
1. PHASE 1 INCLUDES BOTH TEMPORARY AND PERMANENT
BASINS AND TRAPS. SEE TABLE BELOW.
2. SEE SHEETS 4 THROUGH 13 FOR SEDIMENT BASIN
DETAILS.
3. SEE SHEET 17 FOR SEDIMENT TRAP DETAILS AND SIZING.
4. MAXIMUM SLOPES ARE 3H:1V UNLESS NOTED
OTHERWISE.
5. SITE LAYOUT IS BASED ON GASTON COUNTY UNIFIED
DEVELOPMENT ORDINANCE APPROVED DRAFT, DATED
9/28/2021.
6. STREAM CROSSINGS AS SHOWN ARE DESIGNED PER THE
GASTON COUNTY UDO FOR THE SOUTH FORK RIVER
WS-IV-PA. BUFFER DISTURBANCES HAVE BEEN
MINIMIZED, AND NO IMPACTS WILL BE ALLOWED WITHIN
THE DELINEATED STREAM "HIGH WATER MARK."
EROSION CONTROL MEASURES
TEMPORARY SEDIMENT TRAPS:
ST222 - ST240
TEMPORARY SEDIMENT BASINS:
SB208 - SB210
PERMANENT SEDIMENT BASINS:
SB201 - SB207
LEGEND
100 YR. FLOOD PLAIN
DELINEATED WETLANDS
0 DELINEATED WATERS
PROPOSED CONTOURS
EXISTING CONTOURS
—X —X 7-FOOT FENCE LINE
—X—X SILT FENCE LOCATION
a BUILDING / STRUCTURE
ADJACENT PROPERTY LINE
CULVERT
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
1-3 ZONING SETBACK
45 FT PLANTING BUFFER
30 FT. DELINEATED STREAM BUFFER
— —
SEDIMENT TRAP/BASIN DRAINAGE AREA
F
TEMPORARY DIVERSION SWALE
•
CONCRETE WASHOUT
CONSTRUCTION ENTRANCE
a
SEDIMENT TRAP SPILLWAY
PIPE OUTLET PROTECTION
CONSTRUCTION STAGING AREA
LITHIUM HYDROXIDE
CONVERSION PLANT- PLAN VIEW
PHASE 1
FILENAME - OOC-01 SHEET
1 OF 20
SCALE - 1" = 200'
0
C
IV
0

1 2 3 4 5 6 7 8
RD ill ` I ) I 1 66��W�
\\C_Jj �_CH
-��
00
<
�
II)
))I)1
N,
/ , ,x 200 0 200 400
/ /� / 0 �)1 �/
/ I / // /� �� �+� f \\ ��,�� / '� / SCALE IN FEET
1 I
�/ I j� / �- g PROPOSED / x X �� \\\ \`II Ali ..� h \\�I vW
r0 �\ 1111, ��� \\ 1 \ \ / / /
� \\\ \ CULVERT C-101
��j j �/� —$g MAIN SUBSTATION 59 LF 24" REINFORCED CONCRETE \\\\, 4>� \ n I I 8, \�✓J �j
�i AND PARKING y �x'�O��� \
f \ \I IIII \�pIPE 5.12% SLOPE WETLAND AREA 3 \
- � ST-222 f CULVRT C-102 �� \� i �
�/ y + - '� \�\`,`�'i''il I 47 LF 36" REINFORCED CONCRETE PIPE 0.09 ACRES J—
\ WETLAND AREA 2 �i ST-223 \ f \ \\ 1 �1 0 00
it ' / �\,�`I \�
- f f\\\ 1, l @ 6.45 /a SLOPE w, ��II, J I \\87� GENERAL NOTES:
) u � ��/ .01 ACRES
000b ' � � �� ------ � / 1. PHASE 2 INCLUDES PERMANENT BASINS AND SITE
�v ` .�►' ,� ' f o -- IMPROVEMENTS. SEE TABLE BELOW.
+
' p+� �X-x- -x-x- - x-xX \\ �; 2. SEE SHEETS 4 THROUGH 13 FOR SEDIMENT BASIN \i/. ✓ a �- `�, `+ X";� �� A V DETAILS.
\\ \ CSX RAIL RIGHT-OF-WAY x-x + 8)6 r -� \�\ 3. SEE SHEET 17 FOR SEDIMENT TRAP DETAILS AND
� _ -
_�
SIZING
ST-227 ,X 4 "� 4. MAXIMUM SLOPES ARE 3H:1V UNLESS NOTED
-x-X-x - _
+� ° ��,OTHERWISE
911 + N ST-224 i
` �� -'�`� - y \�� X WETLAND T, 5. SITE LAYOUT IS BASED ON GASTON COUNTY UNIFIED
+
i �
�I a DEVELOPMENT ORDINANCE APPROVED DRAFT, DATED
914 �� ��� ��� _ ° x o ° o 0.06 ACRES p
0
9/28/2021.
+\
J \ �,,,..—+_M I I I ( 6. STREAM CROSSINGS AS SHOWN ARE DESIGNED PER
913
X I `x, �� 89 `+}\ ST-225
THE GASTON COUNTY UDO FOR THE SOUTH FORK
+ + x \ \ '� /� II RIVER WS-IV-PA. BUFFER DISTURBANCES HAVE BEEN
^�'� MINIMIZED AND NO IMPACTS WILL BE ALLOWED WITHIN
li4 I Z THE DELINEATED STREAM HIGH WATER MARK.
+Q �
EMIL—
`X
x I / �
Xx,X, X + .� x
+` +-x -x -x -x x -x -x -x -x -x x -x - x -x -x -x -x -x ,
907 X-x,X,X, X +. �, Sv` �,��� \++-x-x-x-x--x-x-x-x- x-x-x-x- -x� 864
X+ ,�,y �+ x III /
X\
x - 858 = -f
x f -�0
-
x + /
\ xx +\��+ ► +�y+,�,� o f
/X 86
+SB-207CO f - +x
Ico �CULVERT C-103 108 LF 48 REINFORCED CONCRETE PIPE 2.70/SLOPE +h
WETLAND AREA 1 \I
x 0.52 ACRES `+ �I
w X i -' x
I II I I II
�x- x- x- x- x- x- x-
EXISTING CEMETERY SITE _
z -
0
FOR
0
x
x- - x- x- x_ x-x ST-229 x\� + \ MINOR — - °°
x-�x-x_x- x STREAM CROSSING NO. 3 x
x-x x _ SEE SHEET 14� X
x- x ° ° x
x- x-
P-
-
MD
BOBS CBS ..BC s -
R-eMu EouSac
ia,Eo:
(°cnuqw
m"
j
PIEDMONT
LITHIUM
L
-226
X O
}
- 50' CEMETERY SITE BUFFER
x �� C) 00
x --- —
,� SB-205 X �M o0
I1
-A j
x T, �� ' 30' STREAM BUFFER (TYP) `v
x ST-233 X� sow. — --840��.
x �� �33
- + ST-230 ST-234
D°°
SB-201 \ \
"m"""'°"°°�
X �P
X \ ,R.CR IBNBI9Y \ 6 —
'� �...
O
\11 0
�
EROSION CONTROL MEASURES
TEMPORARY SEDIMENT TRAPS:
ST222 - ST240
TEMPORARY SEDIMENT BASINS-
SB208
SB209
SB210
PERMANENT SEDIMENT BASINS:
SB201 - SB207
0
Cr
\III LEGEND
00
k X
100 YR. FLOOD PLAIN
DELINEATED WETLANDS
�`��� DELINEATED WATERS B
PROPOSED CONTOURS
till X
1:AT \ -
EXISTING CONTOURS I 1, 00 ono
O o X. I�IIIII IIII X X 7 FOOT FENCE LINE
I
ST-231 X ° o o x III I l 8 s —X—X SILT FENCE LOCATION
I I
-X- -x--x +�, �� -x O� ' �� �- _ a BUILDING / STRUCTURE
s6-2o6 ' o�.x. - x x 1 843
AA.-
--- I
7!11—ADJACENT PROPERTY LINE
STREAM CROSSING NO. 4 w' DO O
SEE SHEET °
CULVERT
SB-4 SEDIMENT BASIN LABEL
y
x - ❑❑
x ��
,x-x-x�x 0
� � ST 11 SEDIMENT TRAP LABEL
- kXXXXkXf � ,x
X sT-232 x Xx X x- FLOW DIRECTION ARROW
X -
- ST-235
x/� X X _,�-x' Ll
EROSION AND SEDIMENT
WETLAND AREA 5 0 o X CONTROL STRUCTURE
0.11 ACRES XX� � X X
4 0 t M f LOX X X GASTON COUNTY PARCEL LINES
I 00 I� X MINE PERMIT LINE
- X
}}} s6-2o4 �� C) � X` X X 1-3 ZONING SETBACK
}00
00
X XX X 45 FT PLANTING BUFFER
CD
30 FT. DELINEATED STREAM BUFFER
If sue. e X
EXISTING CEMETERY SITE X'X;k;� °°j X ` X �; — — SEDIMENT TRAP/BASIN DRAINAGE AREA A
' +1 ---820-824 X -+ F TEMPORARY DIVERSION SWALE
ico N 100 YEAR FLOOD ZONE +
" M - X • CONCRETE WASHOUT
-- 50' CEMETERY SITE BUFFER }} ° �Xi \ tco
x +
} Xo x ,�-x-x-x-x_x_ CONSTRUCTION ENTRANCE
} x,+ x SB-203 X k
SUBJECT PROPERTY LINE (TYP) }. k
SEDIMENT TRAP SPILLWAY
'+
x x x _ _
•
x x PIPE OUTLET PROTECTION
WETLAND AREA 6
1.13 ACRES
X-
PROJECT MANAGER V. HAYNES
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
0
O
o
O
O
0
oO 0
oO 0 0
0
0
0 0
O
O
O
°O O o
I°O
° 0
0 °
O
O
O
lO
08 a
o O
08 a
o
00
mol
�
0
00 °
ti-:SS/o
�� SEAL
032062
J
Valerie K. Hayn�S�jr➢ 9, 2-0'?`t9 EST)
CONVEYOR TO MINE, BY OTHERS
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
LITHIUM HYDROXIDE
CONVERSION PLANT- PLAN VIEW
PHASE 2
FILENAME - OOC-02 SHEET
2OF20
SCALE - 1" = 200'

1 2 3 4 5 6 7
\\n)
III �/l \J ,—�— //� i = ' �) \ � ��♦ III 1 X \\ \ r
I IIII � / f \\�� 1 � �� _ 886 � 1) I\ I I� • l l / /�
��� =mil
I \ _
X
// ��\\ \\ I \ \ �� / / -� / • / X ♦ DA1: 74.73 AC I \ \ \ \ \
. / TOC: 28.1 MIN
.
--J 9 / 1 x i ` CN:78 I \
\\ III �n ✓ �� / \ \ 1 I / x
CHURCRD=•
(60 R0
W
�/ ■ � � J�f� � -�\\�� _ , r��
/ III II o
\\\ \\\\III II II III I \�� ► ,, , \ \,� ��\ \\� \ ����� ♦• _ `�\�\\\\ \\ I \\ \ ��) r _ \ \
)\\\ \ III I111 / J )) J l /� / ��� �, �� J) ) \ ,� , a I DA2: 14.7 AC ,)III \ ��„ \ \ • •, i/ �� \ \\ \\ I 1 \
I �� ,x,x,x \ TOC: 14.7 MIN \\\\\\ \ •� \� \ 1 \ \ / ( �) /�
c� �� / 1 / l / ■ ■ ,x-x f I CN: 79 I \\\ 8 1 \ �♦ — \ \ \ ! i / I
I 11 �/ / ��� \ / � — � // = � ♦ • ,x� 4t#
// / 11 l 11 h, ��//�� // — _ ��/ l ♦ -•• x-x ♦-� I \\\\\ \ \t� I � V,co
—
/ l l /
/� I tw!
_9`+ ■ f \\\�LVERT C-101 / / i\\�~L-�9 \ � \\� +`.f \ 59 LF 24 REINFORCED CONCRETE PIPE 5.12% SLOPE — /�_� /�� i ♦ �fv, +-x -x \ \ \IIII
ST-222 V \ CULVERT C-102
�■ ■ ■ \ I 'I r @ 6.REINFORCED
D CONCRETE PIPE LF 36ooST-223 f��) \V\J
45% SLOPEc��
f
�•• ������� �`b L� +. +�.--x- -x-x TOC 129MIN \ \ \
/ CN: 78
ell
v�382
-, I
911 +.�8�� \ ♦ I I
_ � t --- - ST-224 x
14 �— 8 V/ �► �\ \ uA
/��
x
x = • / _�
co
0 co + co
+ X I lI I
0 0)o � co y+A I I
09 \� I DA5- 14.22 AC • + + OWN
/-
ix, TOC: 16.1 MIN • f+ ;� �+ +�+�+ +-x-x-x-x x-x"-x-x -x -x—-x- x-x-x-x
\� _ Q -X
17 x x,k,x, I \ CN: 79 • `+ + `�1l 0 �I + �k-x -x -x =�r-�c =x -x =x-x -x x -x -x - X 864 / I
1 ■
+ DA4. 149.8 AC y+ f 5
' �■ ■ ■ 880
■+ ++ i INCLUDES DA1-3,5 +` �+ �o o _ X
x-x'� x—x' I I�,�
i x-x-x-� y- -860 '� '8 1
1 + _ + +� TOC: 27.7 MIN +� `+ C 850 X I co
X CULVERT C-103 SB-207 -
x @ `+ CN: 76 `-.11 \\� +� � ♦ 840 X fir- I
1 108 LF 48" REINFORCED CONCRETE PIPE 2.70 /o SLOPES + _ + \ �� cP +i n I
f o I
K +\ \ ` \' y X x-X_x_X r d
00
+` X00
x x \ cA
ST-229WIN 0
N
x- �\
xl-x-x-x"X"x-X_x_x-x "X x-x-1+.�,x� `b��+
+X \\\ \\ 8g
\ . ++ ST-226 },� �� o o — SB-201
0'
\+` } o o �
\ X VA A
1 V \\
% u
X
X V\
�1 \
X xi1 y
1 i
X II
1 xi i
ST-233 i i -
X xi
11 \
j
PIEDMONT
LITHIUM
SB-206
+ x,
++ X o o o °sv
oo
S co °
SSB-205 - ---- oO
00 °
�r �+ O O O fi\
4 + + O X� ° o ° o
+ o o
��o - k,�,o --_ ; - �♦
�+ x_X,•�x+�-�x\_.x �I \xx-x- �, xfvvvx o 0 o°
° M�°g°g,
�00
fkx 0 p
°°
�8401 O O+. T-234 xXxX i SB-202Fly + o 0 0 0 oo III I I Iy
_ h 0 0837 00
o o
x ST-231
�\�
V
\V .
O O
I
x
o � 84
0
■ ■ DO vx �110
x- x- x- x- ��
3p ❑ Elx- x_ x- X \b'
x_
ST-232 x x x x
} �x' (V 1-
/ k co
10
X 00 o X X
l i 00 X X
00 � 00
1 \
/} SB-204 i � x X X x
}� X" � I oo ` X v
oc 00 X
% co &a X X
n.
/ X
1 1
PROJECT MANAGER V. HAYNES
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
CAR
�-:SS/o
��
032062
J
Valerie K. HaynNQjr➢ 9, 2-0' o1Y1 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
n
01
200 0 200 400
SCALE IN FEET
=j .gym. 1
w-
100 YR. FLOOD PLAIN
DELINEATED WETLANDS
0
DELINEATED WATERS
PROPOSED CONTOURS
-
EXISTING CONTOURS
—X—X
7-FOOT FENCE LINE
—X—X
SILT FENCE LOCATION
a
BUILDING / STRUCTURE
ADJACENT PROPERTY LINE
CULVERT
SB-4
SEDIMENT BASIN LABEL
T-11
SEDIMENT TRAP LABEL
-
FLOW DIRECTION ARROW
EROSION AND SEDIMENT
CONTROLSTRUCTURE
GASTON COUNTY PARCEL LINES
MINE PERMIT LINE
1-3 ZONING SETBACK
45 FT PLANTING BUFFER
30 FT. DELINEATED STREAM BUFFER
r .
SEDIMENT TRAP/BASIN DRAINAGE AREA
F
TEMPORARY DIVERSION SWALE
•
CONCRETE WASHOUT
CONSTRUCTION ENTRANCE
®
SEDIMENT TRAP SPILLWAY
PIPE OUTLET PROTECTION
■ ■ ■ ■
STREAM CROSSING DRAINAGE AREA
TIME OF CONCENTRATION FLOW PATH
DRAINAGE ANALYSIS MAP,
PLAN VIEW
FILENAME - OOC-03
SCALE - 1" = 200'
SHEET
3OF20
0
C
IV
0

1
2
3
0
7
PARALLEL RUNS OF
24" HDPE PIPE
@ 1 % SLOPE
DOUBLE INLETS AT
O
LOW POINT, PROVIDE
O
INLET PROTECTION
DURING CONSTRUCTION
V
0
O
0
0
O
PVC EN
PVC
X
� X
X
X
x ! i
T WIRE FENCE X
SEE DETAIL SHEET 16 OF 20 X
x OUTLET PROTECTION OP-201A, X
0O SEE DETAIL SHEET 16 OF 20 X
� X
POROUS BAFFLES
SEE DETAIL SHEET 16 OF 20
X
o - •
x l
SILT FENCE
/ . SEE DETAIL SHEET 16 OF 20
. X
X
roM� X
X
X B-201
Mco / X
X
11
X
BOTTOM OF POND ,% X
ELEV. 832.00
X EMERGENCY SPILLWAY
k I ELEV.835.50
SEE DETAIL THIS SHEET
} X
X
I } X
� � I
i 36" OUTLET STRUCTURE WITH
} SKIMMER AND 50 LF OF 18" HDPE
k
A' SEE DETAILS THIS SHEET
i 72" OUTLET STRUCTURE WITH
SKIMMER AND 50 LF OF 24" DOUBLE
BARRELHDPE
SEE DETAILS THIS SHEET
} \ X
OUTLET PROTECTION OP-201
SEE DETAIL SHEET 16 OF 20
A0 I 4�
+ TOP OF BERM ELEV. 837.00 � X
� r �
x BASIN ACCESS ROAD X 30' STREAM BUFFER
PERSPECTIVE VIEW
END VIEW
"C" ENCLOSURE
4TFR FNTRY I WIT
PVC VENT
FRONT VIEW
FAIRCLOTH SKIMMER
NOT TO SCALE
PIEDMONT
L I T H I U
cr'ur_ni ii E 40
LE FOR
METER
'LATE
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
Basin
Drainage Area
Proposed Depth
(ft)
Cleanout Depth
(Ft)
Depth of Flow
over Spillway(ft)
Skimmer Size
(in)
Actual Orfice
Diameter (in)
Riser Diameter
(In)
Barrel
Diameter (in)
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)
SB-201
11.16 ac
2.5
1.25
0.5
5.0
2.25
36
18
256
85
292
118
20,088
56,503
23,826
25,098
20
7.0 (x2)
7.0 (x2)
1.00
72
DBL 24
INSTALL COLLAR WITH
CORRUGATIONS VERTICAL.
COLLAR TO BE OF SAME
GAGE AS THE PIPE WITH
WHICH IT IS USED.
1 1 1 1 1 1 1 1 1 1 1 1 1 1
I I I I I I I I I I I I I
I I I I I I I BAND
I I I I I I I I I I I I I
I I I I I I I I 1 /2" X 2" SLOTTED
111111111111 1111111 III HOLES @ 8" C.C.
I111�1�1 FOR 3/8"0 BOLTS
IQ1 101 101 Id 1 I0I 1 IO
N OD OF PIPE
Id 01 1 101 IQ ' i01 101
III'IIIII II'IIIII
III'Illll I I I 'Illll
I I I I I I I I I I I
II111III111III111III111I I
I1I111I11111I11111I11111I1 ONE PIECE CONNECTING
I I I I I I I I BAND WELDED TO PIPE;
CONTINUOUS WELD BOTH
SIDES OF BAND
W
ANTI -SEEP COLLARS
NOT TO SCALE
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 RETRIEVAL ROPE 10, Top
DETAIL THIS SHEET BERM WIDTH
ANCHORED IN
THE SLOPE
SEDIMENT �
CLEA UT
GAGE
CREST ELEVATION
SEDIMENT
CLEANOUT 1
MARK Q 3 I
PROJECT MANAGER V. HAYNES
11 I I 1=1 11=1 1 1bIPE
BARREL
20' EVERY
CONCRETE BASE 20
SEDIMENT RISER BASIN
NOT TO SCALE
C A ROB''%,'-
SEAL
032062
� . C.)
Vaa e
Valerie K. Hayne*;j , 9, 2. 4e EST)1111111110
Q/. nc
SKIMMER. SEE
DETAIL THIS SH
1" STAINI.
STEEL S1
FLEXIBLE COUI
WITH TRANSITI(
SKIMMER PIP
EMERGENCY SPILLWAY, SEE
DETAIL THIS SHEET
TOP OF BERM
EMBANKMENT STABILIZED
WITH VEGETATION
1�
3 OUTLET APRON
ANTI -SEEP COLLAR
SEE DETAIL THIS SHEET
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
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-201,
PLAN VIEW & PROFILE DETAIL
FILENAME - OOC-04
SCALE - 1" = 50'
SHEET
4OF20
C
C
0

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
J
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-202,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-05
SCALE I - 1" = 50'
SHEET
5OF20

1 2 3
X � ,
X
X ,
X ,
� � x
X ,
� X
I ,
x ,
I � X
X ,
� . x
x ,
� x
I X 1
� x
x ,
x 7' WIRE FENCE
SEE DETAIL SHEET 16 OF 20 X
X i
X ,
x
X . �
X
x
X ,
X X
� X
X ,
� X
X ,
INLET AT LOW x
POINT, PROVIDE . X
INLET PROTECTION
X DURING CONSTRUCTION
POROUS BAFFLES x
X OUTLET PROTECTION SEE DETAIL SHEET 16 OF 20 x
� OP-203A X
24" HDPE PIPE SEE DETAIL EMERGENCY SPILLWAY
@ 1% SLOPE SHEET 16 OF 20 ,ELEV. 811.50
SEE DETAIL THIS SHEET
` + Z713
48" OUTLET STRUCTURE WITH
g12 ' SKIMMER AND 50 LF OF 24" HDPE
SEE DETAILS THIS SHEET
BOTTOM OF POND x
SILT FENCE
16 ELEV. 808.00 SEE DETAIL SHEET 16 OF 20
BASIN ACCESS ROAD TOP OF BERM ELEV. 813.00
m
x x x OUTLET PROTECTION OP-203
SEE DETAIL SHEET 16 OF 20
-x SB-203 X
}. %
x
�.+ 100 YEAR FLOODPLAIN x
_x-x- x-x-x x x x x x x x x
PVC EN
PVC
i
PERSPECTIVE VIEW
END VIEW
"C" ENCLOSURE
4TFR FNTRY I (NIT
PVC VENT
FRONT VIEW
FAIRCLOTH SKIMMER
NOT TO SCALE
PIEDMONT
L I T H I U
C/ILJC-MI II C 40
LE FOR
METER
'LATE
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
0
R
7
Basin
Drainage Area
Proposed Depth
(ft)
Cleanout Depth
(Ft)
Depth of Flow
over Spillway(ft)
Skimmer 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)
SB-203
3.93 cc
2.5
1.25
0.5
6.0
1.25
48
24
174
34
210
67
7,074
18,641
8,390
9,122
20
6.0
6.0
1.0
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
IIIIIIIIIIIIIIIIIIIIIIII II
I I I I I I I I I I I I
IIIIIIIIIII III I IIII
(IIIIIIII IIIIIIII
IQ1 101 10, Id 1101 ID
Id 1 101 1 101 IQ 1101 1 101
lil�lilil Il�lilil
I I I I I I I I I I I
I I I I I I I I I I I
IIIIIIIIIIIIIIIIIIIIIIII I
IIIIIIIIIIIIIIIIIIIIIIIIII
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 RETRIEVAL ROPE 10, Top
DETAIL THIS SHEET BERM WIDTH
ANCHORED IN
THE SLOPE
SEDIMENT
CLEA UT
GAGE
CREST ELEVATION
SEDIMENT
CLEANOUT 1
MARK Q 3 I
PROJECT MANAGER V. HAYNES
11bIPE
BARREL
20' EVERY
CONCRETE BASE 20
SEDIMENT RISER BASIN
NOT TO SCALE
N . CAR p�''�.,'-
SEAL
032062
Valerie K. Hayne*;j , 9, 2. 4e EST)
1/Iu n 1 uN
SKIMMER. SEE
DETAIL THIS SH
1" STAINI.
STEEL S1
FLEXIBLE COUI
WITH TRANSITI(
SKIMMER PIP
EMERGENCY SPILLWAY, SEE
DETAIL THIS SHEET
TOP OF BERM
EMBANKMENT STABILIZED
WITH VEGETATION
1�
3 OUTLET APRON
ANTI —SEEP COLLAR
SEE DETAIL THIS SHEET
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
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-203,
PLAN VIEW & PROFILE DETAIL
FILENAME - OOC-06
SCALE - 1" = 50'
SHEET
6OF20
IQ
C
C
0

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
viq�g)ONW - - —�4*
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-204,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-07
SCALE I - 1" = 50'
SHEET
7OF20

1
2
o 0
0
7
OUTLET PROTECTION OP-205A
SEE DETAIL SHEET 16 OF 20
i I I I
POROUS BAFFLES
SEE DETAIL SHEET 16 OF 20
SILT FENCE
SEE DETAIL SHEET 16 OF 20
I
i
i
TOP OF BERM ELEV. 832.00
\\SB-205
48" OUTLET STRUCTURE WITH
SKIMMER AND 50 LF OF 24" HDPE
SEE DETAILS THIS SHEET
OUTLET PROTECTION OP-205
SEE DETAIL SHEET 16 OF 20 _L
EMERGENCY SPILLWAY
ELEV. 830.80
SEE DETAIL THIS SHEET
30' STREAM BUFFER
PVC EN
PVC
x
x
i
A
IV,-
w \
N
I 00
X
II(I( 1
IX
1
X
1
x o
► I 00
x Bco OTTOM OF POND
x w, ELEV.828.00
x
1 N
X M
1 I �
X I
X III
X co
CO
1 II
X �
Ih1
X
1 00 0
0
00 24" HDPE PIPE O
00
O
@ 1 % SLOPE 0
00
co
:� INLET AT O
f LOW POINT, PROVIDE
INLET PROTECTION
�� •' DURING CONTRUCTION
f � �
` BASIN ACCESS ROAD O
0 0
f
O
♦ ��
PERSPECTIVE VIEW
END VIEW
"C" ENCLOSURE
4TFR FNTRY I WIT
PVC VENT
FRONT VIEW
FAIRCLOTH SKIMMER
NOT TO SCALE
PIEDMONT
L I T H I U
cr'ur_ni ii E 40
LE FOR
METER
'LATE
Basin
Drainage Area
Proposed Depth
(ft)
Cleanout Depth
(Ft)
Depth of Flow
over Spillway(ft)
Skimmer 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)
SB-205
4.50 cc
1.8
0.9
0.2
5
1.50
48
24
216
44
240
66
8,100
18,423
9,607
11,716
20
6.0
6.0
1.0
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
IIIIIIIIII IIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIII II
IIIIIIIIIIII 1 IIIIIII III
I�I�I�I�11 1 1111,111
IQ 1 101 1 101 1d 1 101 1 10
1d 101 1 i01 1Q 1 101 101
111111111 11111111
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
11 (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 RETRIEVAL ROPE 10, Top
DETAIL THIS SHEET BERM WIDTH
ANCHORED IN
THE SLOPE
SEDIMENT
G
CLEA OUT
AGE�
CREST ELEVATION
SEDIMENT
CLEANOUT 1
MARK Q 3 I
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
11 I I 1=1 11=1 1 1bIPE
BARREL
20' EVERY
CONCRETE BASE 20
SEDIMENT RISER BASIN
NOT TO SCALE
PROJECT MANAGER V. HAYNES
C A ROB''%,'-
SEAL
032062
vaGe l i—W
J
Valerie K. Hay9, 2-0' 4e6 EST)
►/I�►n � lIN
SKIMMER. SEE
DETAIL THIS SH
X
1" STAINI.
STEEL S1
FLEXIBLE COUI
WITH TRANSITI(
SKIMMER PIP
EMERGENCY SPILLWAY, SEE
DETAIL THIS SHEET
TOP OF BERM
EMBANKMENT STABILIZED
WITH VEGETATION
1�
3 OUTLET APRON
ANTI —SEEP COLLAR
SEE DETAIL THIS SHEET
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
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-205,
PLAN VIEW & PROFILE DETAIL
FILENAME - OOC-08
SCALE - 1" = 50,
SHEET
8OF20
C
C
0

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
Viq�g)ON . - - —�4*
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-206,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-09
SCALE I - 1" = 50'
SHEET
9OF20

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
viq�g)ONW - - —�4*
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-207,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-10
SCALE I - 1" = 50'
SHEET
10OF20

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
viq�g)ONW - - —�4*
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-208,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-11
SCALE I - 1" = 50'
SHEET
11 OF 20

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
J
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-209,
PLAN VIEW & PROFILE DETAIL
FILENAME I - OOC-12
SCALE I - 1" = 50'
SHEET
12OF20

1
2
3
0
7
6' WIRE FENCE
SEE DETAIL SHEET 16 OF 20
TOP OF BERM ELEV. 885.00
72" OUTLET STRUCTURE WITH
SKIMMER AND 50 LF OF 24" DOUBLE
BARRELHDPE
SEE DETAILS THIS SHEET
EMERGENCY SPILLWAY
ELEV. 883.50
SEE DETAIL THIS SHEET
BOTTOM OF POND
ELEV. 880.00
SB-210
" SB-210 IS FOR PHASE 1 CONSTRUCTION STAGING AREA. ONCE CONSTRUCTION IS COMPLETE
AND STAGING AREA HAS BEEN STABILIZED. SB-210 MAY BE REMOVED.
PVC EN
PVC
PERSPECTIVE VIEW
END VIEW
ST-227
WETLAND AREA 2
0.01 ACRES
1
OUTLET PROTECTION OP-210
SEE DETAIL SHEET 16 OF 20
7�
+
f,
+
POROUS BAFFLES
!l SEE DETAIL SHEET 16 OF 20 +`+
X
SILT FENCE +•+
i SEE DETAIL SHEET 16 OF 20+�
"C" ENCLOSURE
4TFR FNTRY I WIT
PVC VENT
FRONT VIEW
FAIRCLOTH SKIMMER
NOT TO SCALE
PIEDMONT
L I T H I U
"`1 i i E 40
LE FOR
METER
'LATE
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
Basin
Drainage Area
Proposed Depth
(ft)
Cleanout Depth
(Ft)
Depth of Flow
over Spillway(ft)
Skimmer 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)
SB-210
7.55 cc
1.80
0.9
0.2
8.0
2.00
72
24 x 2
260
92
296
114
19,170
56,503
22,738
25,098
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
IIIQI�IIII�IIILr
IIIIIIIIIIIIII1IIII1111
II11I10I,1 111
1I1I0IIIII III101 1d 1II1
11101 1 101 1 Q 1101 101
lil�lilil Il�lilil
I I I I I I I I I I I
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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 RETRIEVAL ROPE
DETAIL THIS SHEET BERM WIDTH
ANCHORED IN
THE SLOPE
SEDIMENT
CLEANOUT�
GAGE
SEDIMENT CREST ELEVATION
CLEAN OUT 1
MARK w 3
Q
PROJECT MANAGER V. HAYNES
=1 1=1 11bIPE
BARREL
20' EVERY
CONCRETE BASE 20
SEDIMENT RISER BASIN
NOT TO SCALE
C A ROB''%,'-
SEAL
032062
� . C.)
Valerie K. Hayne*;j , 9N
, 2. 4e6 EST)
SKIMMER. SEE
DETAIL THIS SH
1" STAINI.
STEEL S1
FLEXIBLE COUI
WITH TRANSITI(
SKIMMER PIP
EMERGENCY SPILLWAY, SEE
DETAIL THIS SHEET
TOP OF BERM
EMBANKMENT STABILIZED
WITH VEGETATION
1�
3 OUTLET APRON
ANTI —SEEP COLLAR
SEE DETAIL THIS SHEET
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
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
SEDIMENT BASIN SB-210,
PLAN VIEW & PROFILE DETAIL
FILENAME - OOC-13
SCALE - 1" = 50,
SHEET
13OF20
C
C
0

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
=-� —: SS,o�..%-
SEAL
032062
viq�g)ONW - - -�4*
Valerie K. Hayne1,j,� 9, 2-0' 4e6 EST)
/Iu 1,uv,
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
STREAM CROSSING NO. 3,
ROAD TO PLANT AREA
FILENAME I - OOC-14
SCALE I - 1" = 20'
SHEET
14OF20

PIEDMONT
L I T H I U
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
CARo
SEAL
032062
viq�g)ONW - - —�4*
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
STREAM CROSSING NO. 4,
RAIL TO PLANT AREA
FILENAME I - OOC-15
SCALE I - 1" = 20'
SHEET
15OF20

1
2
3
0
5
7 I 8
z
J
0
CIVU Vr /'1r lll./IV
PLAN
3 NATURAL GRADE -
H
MIN.
ELEVATION TYPE 2 GEOTEXTILE FILTER
FABRIC LAP (IF NEEDED)
RIP RAP
noo T (THICKNESS)
NOTE: LAYER OF TYPE 2
MINIMUM H=2/3 PIPE DIAMETER GEOTEXTILE FILTER FABRIC
SECTION B-B
Outlet #
RIP RAP
CLASS
LENGTH
(ft)
WIDTH
(ft)
DEPTH
(in)
OP-201 A
1
12
7
12
OP-201
II
24
13
18
OP-202A
1
15
9
12
OP-202
1
15
9
12
OP-203A
1
12
7
12
OP-203
1
12
7
12
OP-204A
1
15
9
12
OP-204
1
15
9
12
OP-205A
1
12
7
12
OP-205
1
12
7
12
OP-206
1
18
11
12
OP-207
1
15
9
12
OP-208
1
15
9
12
OP-209
1
15
9
12
OP-210
1
15
9
12
C-101
II
20
10
30
C-102
1 11
36
18
30
C-103
1 II
48
24
30
NOTES:
1. 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.
2. THERE SHALL BE NO OVERFLOW FROM THE END OF THE APRON TO THE SURFACE OF THE RECEIVING CHANNEL. THE AREA TO
BE 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.
3. 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
4. ALL SUBGRADE FOR STRUCTURE TO BE COMPACTED TO 95% MAXIMUM DRY DENSITY PER ASTM D-1557 OR GREATER.
5. THE PLACING OF FILL, EITHER LOOSE OR COMPACTED IN THE RECEIVING CHANNEL SHALL NOT BE ALLOWED.
6. NO BENDS OR CURVES IN THE HORIZONTAL ALIGNMENT OF THE APRON UNLESS OTHERWISE SHOWN.
7. 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.
RIPRAP OUTLET PROTECTION
NOT TO SCALE
Barbed-wire apron
on extension arms 4,
top tension wire
Y.1�-Line post
Ch airy -link fabric
Brace rail 1
�9 gage. z* mesh) '7-Line post-
(orner, end,
12
or pull post Tie Wires '
(Typ)
F� Bottom of fabric-",,,
`truss Ro r�
(3/88" Alin. D a.)
Bottom rail 1, MAT
.' �1ralde
16' Mill, Dia,
Concrete base
7 FEET HIGH CHAIN LINK FENCE WITH
BARBED-WIRE DETAIL 4
NOT TO SCALE
PIEDMONT
LITHIUM
PROVIDE A MINIMUM OF THREE
POROUS BAFFLES PER SKIMMER
SEDIMENT TRAP
F/o�
PROVIDE A MINIMUM 8' WIDE x 1
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
pow
/ Earth
/ Bean
(TYPICAL)
4'-0" MAX SPACING
5' STEEL POST
8"DX6"W TRENCH
BACKFILL AND COM
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.
POROUS BAFFLES
NOT TO SCALE
REQUIREMENTS.
TYPICAL DITCH SECTION
NOT TO SCALE
DESIGN CRITERIA:
1. AGGREGATE SIZE: 2-3" DIAMETER WASHED STONE
2. PAD THICKNESS: 6" MINIMUM
3. PAD WIDTH: 12' MINIMUM
4. PAD LENGTH: 50' MINIMUM
5. PAD LOCATION: LOCATE CONSTRUCTION ENTRANCES AND EXITS TO
LIMIT SEDIMENT FROM LEAVING THE SITE AND TO PROVIDE MAXIMUM
UTILITY BY ALL CONSTRUCTION VEHICLES. AVOID STEEP GRADES
AND ENTRANCES AT CURVES IN PUBLIC ROADS.
6. WASHING: IF CONDITIONS AT THE SITE ARE SUCH THAT MOST OF
THE MUD AND SEDIMENT ARE NOT REMOVED BY VEHICLES
TRAVELING OVER THE GRAVEL, THE TIRES SHOULD BE WASHED.
WASHING SHOULD BE DONE ON AN AREA STABILIZED WITH
CRUSHED STONE THAT DRAINS INTO A SEDIMENT TRAP OR OTHER
SUITABLE DISPOSAL AREA. A WASH RACK MAY ALSO BE USED TO
MAKE WASHING MORE CONVENIENT AND EFFECTIVE.
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
GEOTEXTILE FABRIC TO STABILIZE
FOUNDATION (ESPECIALLY IMPORTANT
WHERE WETNESS IS ANTICIPATED)
2-3" DIAMETER
WASHED STONE 6"
6" PERSPECTIVE VIEW
D
CONSTRUCTION ENTRANCE
NOT TO SCALE
PROJECT MANAGER V. HAYNES
,,,,,,,,11111 "
%`N . C A RO�''o'%
.�� SEAL
032062
Valerie K. Hayr ee*jp,� ;i2.0r ?`t9 EST)
12' MIN.
MIN. 14 GAUGE GALVANIZED WIRE -
FENCE WITH MAX. 6" MESH SPACING
4"x4" REINFORCED
SAFETY POST CAP
(TYP. ALL POSTS)
r
CM N
O
00
00
Z
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".
TIA AM \A AT Annon Anu _�-
STREAM
CHA NEI
TEMPORARY SPAN
BRIDGE CROSSING \\
STREAM /
CHANNEL
TIMBER MAT APPI
PERSPECTIVE VIEW
TIMBER MAT
APPROACH
SURFACE FLOW
DIVERSION TO
TRAP
SYNTHETIC FILTER FABRIC
(CERTIFIED TO MEET THE
REQUIREMENTS OF ASTM D 6461)
8'-0" MAXIMUM 5' PAINTED OR
GALVANIZED STEEL POST
(1.25 LB/LF)
ATTACH TO POSTS WITH
WIRE OR PLASTIC ZIP TIES
00<
(MIN. 50 LBS TENSILE STRENGTH)
00<
r- GRADE
8" DOWN & 4" FORWARD
ALONG THE TRENCH �J�J
FRONT VIEW
5' PAINTED OR
GALVANIZED STEEL POST
4"x4" REINFORCED (1.25 LB/LF)
SAFETY POST CAP
(TYP. ALL POSTS) MIN. 14 GAUGE GALVANIZED WIRE
FENCE WITH MAX. 6" MESH SPACING
co
It
N
SILT FENCE
NOT TO SCALE
N
O
00
iI - z
00
INSTALL
SIDEBOARDS OR
COMPOST FILTER
SOCKS, OR OTHER
MATERIAL TO
PREVENT
SEDIMENT FROM
EXITING THE TEMPORARY
SIDES OF THE7CROSSING
SPAN
BRIDGE. BRIDGE
SIDE VIEW
ORIGINAL
TR At B NK
FILTER FABRIC FILTER FABRIC
STREAM BED---'
LONGITUDINAL SECTION
SYNTHETIC FILTER FABRIC
(CERTIFIED TO MEET THE
REQUIREMENTS OF ASTM D 6461)
TRENCH IN SILT FENCE.
BACKFILL AND COMPACT
THOROUGHLY AFTER PLACEMENT.
FLOW
GRADE
4" MIN.
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.
SURFACE FLOW
DIVERSION TO
TRAP
TEMPORARY STREAM CROSSING CONSTRUCTION DETAIL
NOT TO SCALE
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
EROSION CONTROL DETAILS
FILENAME - OOC-16
SCALE - N.S.
SHEET
16OF20
C

1
CONSTRUCTION NOTES
2 1 3 1 4 1 5 1 6
c�i inn�nT non
7
STAKE TO SUPPORT WIRE
NO
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.
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 4B .01101
laz.>;y�.�.��•r�urran_v�y�:�x�mi:�a�aa►rry
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 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'/z 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.
PIEDMONT
LITHIUM
18" MIN. NCDOT CLASS B
RIPRAP
PLAN
SILT FENCE
3'-0" MIN.
& X' MAX.
18" MIN. NCDOT CLASS B
8 OZ./SY NON -WOVEN
2'X2' KEYWAY
SANDBAGS (TYP.)
OR STAPLES
NCDOT TYPE 2
GEOTEXTILE FILTER FABRIC
BETWEEN RIPRAP AND SOIL
OUTLET
PROTECTION
OVERFILL 6" FOR
SETTLEMENT
NATURAL GROUND
OR COMPACTED FILL
ONSITE CONCRETE WASHOUT
STRUCTURE WITH LINER
HIGH COHESIVE & LOW
FILTRATION SOIL BERM
CONCRETE CLEARLY MARKED
WASHOUT SIGNAGE NOTING
DEVICE (18"X24" MIN.)
T-F
10 MIL
1: 1 PLASTIC
SIDE LINING
E SANDBAGS (TYP.)
SLOP
(TYP.)-� `OR STAPLES
SECTION A -A
NOTES:
1. ACTUAL LOCATION DETERMINED IN FIELD.
2. THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE
LIQUID AND/OR SOLID REACHES 75% OF THE STRUCTURES CAPACITY.
3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARLY MARKED WITH
SIGNAGE NOTING DEVICE.
BELOW GRADE WASHOUT STRUCTURE
NOT TO SCALE
SEDIMENT TRAP DETAIL
NOT TO SCALE
PLAN
700 g/mZ COIR EROSION
BLANKET, COIR MESH OR SIMILAR,
TRENCHED INTO BOTTOM OR SIDE
Cr/1T1/'1A1 A Al
T
CONCRETE CLEARLY MARKED
o z WASHOUT DEVICE SIGNAGE NOTING
-F-T (18"X24" MIN.)
10 MIL
PLASTIC LINING
1:1 SIDE
-SLOPE
(TYP.)
mT \ 1 2'
SECTION B-B
HIGH COHESIVE & LOW
FILTRATION SOIL BERM
3'-0" MIN.
& X' MAX.
NOTES:
1. ACTUAL LOCATION DETERMINED IN FIELD.
2. THE CONCRETE WASHOUT STRUCTURES SHALL BE MAINTAINED WHEN THE
LIQUID AND/OR SOLID REACHES 75% OF THE STRUCTURES CAPACITY TO
PROVIDE ADEQUATE HOLDING CAPACITY WITH A MINIMUM 12 INCHES OF
FREEBOARD.
3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE CLEARLY MARKED WITH
SIGNAGE NOTING DEVICE.
ABOVE GRADE WASHOUT STRUCTURE
CONCRETE WASHOUT
NOT TO SCALE
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
NOT TO SCALE
N . C A RO�''o'%
SEAL
032062
Valerie K. Hayne*;j , 9, 2. 4e EST)
jinnI1110
OUTLET
CONCRETE WASHOUTS
SEDIMENT TRAP SIZING
SEDIMENTTRAP
NO.
DRAINAGE
AREA (ac.)
Q25 (cfs)
REQUIRED
SURFACE AREA
(sf)
REQUIRED
STORAGE
VOLUME (cf)
PROVIDED
SURFACE AREA
(sf)
PROVIDED
STORAGE
VOLUME(d)
MINIMUM
WEIR LENGTH
(ft)
ST-222
0.50
2.45
1,067
1,800
1,355
2,190
4
ST-223
0.40
1.96
854
1,440
1,088
1,713
4
ST-224 - Phase 2
1.55
7.61
3,309
5,580
3,405
5,593
6
ST-225 - Phase 1
2.58
12.66
5,508
9,288
6,071
10,712
8
ST-225 - Phase 2
1.66
8.15
3,544
5,976
3,740
6,184
6
ST-226 - Phase 2
1.50
7.36
3,202
5,400
3,296
5,762
6
ST-227
0.70
3.44
1,494
2,520
1,640
2,704
4
ST-228
0.80
3.93
1,708
2,880
1,808
3,010
4
ST-229 - Phase 2
1.50
7.36
3,202
5,400
3,296
5,762
6
ST-230
2.25
11.04
4,804
8,100
4,821
8,631
8
ST-231
0.60
2.94
1,281
2,160
1,640
2,704
4
ST-232
0.80
3.93
1,708
2,880
1,808
3,010
4
ST233 - Phase 1
3.10
15.21
6,618
11,160
7,059
12,622
8
ST-233 - Phase 2
1.15
5.64
2,455
4,140
2,670
4,596
6
ST-234
0.50
2.45
1,067
1,800
1,640
2,704
4
ST-235
0.25
1.23
534
900
621
902
4
ST236 - Phase 1
2.80
13.74
5,978
10,080
6,071
10,712
8
ST237 - Phase 1
1.60
7.85
3,416
5,760
3,966
7,018
6
ST238 - Phase 1
0.50
2.45
1,067
1,800
1,224
1,826
4
ST239 - Phase 1
3.20
15.71
6,832
11,520
7,059
12,637
10
ST240 - Phase 1
2.95
14.48
6.298
10.620
7.059
12.622
10
CROSS SECTIONAL VIEW
NOTES:
1. IMMEDIATELY LINE AND STABILIZE BEFORE ANY DOWNSLOPE GRADING BEGINS
(STABILIZATION MUST OCCUR BEFORE ISSUANCE OF A CERTIFICATE OF
COMPLIANCE). STABILIZATION METHOD IS BASED ON VELOCITY OF OFFSITE
DRAINAGE.
2. DIVERSIONS SHOULD ONLY BE USED FOR DRAINING 5 ACRES OR LESS.
3. DIVERTED WATER SHOULD EMPTY INTO AN APPROVED OUTLET DEVICE.
4. ALL TEMPORARY DIVERSION SWALES SHALL BE MATTED.
TEMPORARY DIVERSION SWALE
NOT TO SCALE
1. Do not discharge concrete or cement slurry from the site.
2. Dispose of, or recycle settled, hardened concrete residue in accordance with local
and state solid waste regulations and at an approved facility.
3. Manage washout from mortar mixers in accordance with the above item and in
addition place the mixer and associated materials on impervious barrier and within
lot perimeter silt fence.
4. Install temporary concrete washouts per local requirements, where applicable. If an
alternate method or product is to be used, contact your approval authority for
review and approval. If local standard details are not available, use one of the two
types of temporary concrete washouts provided on this detail.
5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk
sections. Stormwater accumulated within the washout may not be pumped into or
discharged to the storm drain system or receiving surface waters. Liquid waste must
be pumped out and removed from project.
6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it
can be shown that no other alternatives are reasonably available. At a minimum,
install protection of storm drain inlet(s) closest to the washout which could receive
spills or overflow.
7. Locate washouts in an easily accessible area, on level ground and install a stone
entrance pad in front of the washout. Additional controls may be required by the
approving authority.
8. Install at least one sign directing concrete trucks to the washout within the project
limits. Post signage on the washout itself to identify this location.
9. Remove leavings from the washout when at approximately 75% capacity to limit
overflow events. Replace the tarp, sand bags or other temporary structural
components when no longer functional. When utilizing alternative or proprietary
products, follow manufacturer's instructions.
10. At the completion of the concrete work, remove remaining leavings and dispose of
in an approved disposal facility. Fill pit, if applicable, and stabilize any disturbance
caused by removal of washout.
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
EROSION CONTROL NOTES
FILENAME - OOC-17 SHEET
17OF20
SCALE - N.S.
C

PIEDMONT
L I T H I U M
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
EsS,o�..%-
�� SEAL
032062
Valerie K. Hayne*j,� 9, 2-0' 4e6 EST)
/Iu 1,u ,
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
ROAD PROFILE
FILENAME I - OOC-18
SCALE I - 1 " = 100,
SHEET
18OF20

PIEDMONT
L I T H I U M
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
EsS,o�..%-
�� SEAL
032062
Valerie K. Haynel j,� 9, 2-0' 4e6 EST)
/Iu 1,u ,
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
RAIL PROFILE 1
FILENAME I - OOC-19
SCALE I - 1 " = 100,
SHEET
19OF20

PIEDMONT
L I T H I U M
2 12/08/2021 REVISED PER DEMLR COMMENTS
1 8/27/2021 MINING PERMIT
ISSUE DATE DESCRIPTION
PROJECT MANAGER V. HAYNES
EsS,o�..%-
�� SEAL
032062
J
Valerie K. Hayn�Sij,� 9, 2-0'�`t9 EST)
LITHIUM HYDROXIDE CONVERSION PLANT
GASTON COUNTY, NORTH CAROLINA
RAIL PROFILE 2
FILENAME I - OOC-20
SCALE I - 1,, = 100,
SHEET
20 OF 20