8567 Wilshire - Closed LUST Site
with Groundwater Contamination
8501 Wilshire
Former Gas Station
8483 Wilshire
Former Gas Station
8383 Wilshire - Former LUST
Site / Hazardous Waste Spill
Groundwater Contamination
8441 Wilshire - Auto Sales,
Repairs, Gasolene
EXPLANATION
1
1
2
( P)
7916 G-131 WILSHIRE
A
M
6
7902
MA-
31
3
E-12
M
026
A-79
6
7902
MA2
3
7916
MA-
3
A-78
2
04
2
G-13
-8
M-17 G
NO. 10 DOUBLE CROSSOVER
2(SC-11W)
0B -68291-B
(M
3
A
1
1
2
A
E-12 -121B E-12 G
-129
1
G
E
0
1
P-
E-12
2
/ LA CIENEGA STATION
e)
Wav
2
NV4
2
1
E-
Investigations for Adv. PE Phase:
e)
WavA-69086
S
(
M
-303
4
C
5
86-B 86
-690M A-690
A
M
S-10
O
7
101
OB181
2
B-10 A-79
)
W
A(M
1
2
1
E9
NV-2
-B
8291
A-6
291
A-68
2
C-30e)
av
)
(MW
(S-W
A
0
12
0B E-
Geotechnical CPT with Soil Gas Probes
G-312
Geotechnical Rotary-Wash / Hollow-Stem Auger Boring
8
0
NV-3
G-131
Geotechnical Rotary-Wash Boring
C-112
Geotechnical CPT
S-107
Geotechnical Sonic Core
E-122
Environmental Boring [Direct Push]
140
120
?
Pump Test
CPT [Geotechnical + Gas - BAT]
Qalo
567+80 Transverse Profile
?
(6-10-11)
Shallowest groundwater depth measured in an observation well and date of measurement
(4-27-11)
Shallowest overnight groundwater depth measured in a boring
(5-18-11)
Shallowest groundwater depth measured during drilling of a boring
?
?
Depth to recorded shallowest groundwater table
AMEC Environmental Exploration
Geologic contact line
AMEC Geotechnical Exploration
Historically recorded highest groundwater level (CDMG, 1998)
240
ELEVATION
220
Prior Investigations:
M 90192
1
G-128(P)
E-120
G-129
E-120B
C-302
E-120A
P-48
200
CWDD (CEG) 21
SV-6, RC-17
180
= Geotechnical
= Gas Well or CPT with Gas Reading
Geologic Units:
AMEC Geotechnical Exploration
AMEC Environmental Exploration (1992)
CWDD Converse Ward Davis Dixon (1981)
A-68291B-11
A-68291-3
A-79181-3
160
(MW)
ARTIFICIAL FILL
af
Qal
EnviroRail (1994, 1996)
Symbol Labels:
A-68291-B-9
GALE DR.
OB-101
E-121A
G-130B
P-101
OB-102
571+45 Transverse Profile
S-107
C-112
E-121
E-121B
HAMILTON DR.
E-122A
G-8
Noise and Vibration Point of Interest
NV-24
(undocumented)
YOUNGER ALLUVIUM (Holocene)
- predominantly sand, silt and clay
OLDER ALLUVIUM
Qalo
- varying layers of Silty Sand, Clayey/Silty Clay, and Silt with occasional gravel
Qsp
SAN PEDRO FORMATION
(mid Pleistocene) - predominantly greenish gray
and bluish gray fine-grained Sands, medium to coarse Sands and some Silt Layers
Groundwater monitoring (observation) well
140
(P)
af
Qal
?
?
5/18/11
574+05 Transverse Profile
af
YOUNGER ALLUVIUM (Qal)
M A-69086-5
M-17
G-8
MA-79162-2
160
P-101
M-16
M A-69086B-1
180
Gas Monitoring Well
260
A-78304-4
M A-69086-4
LA CIENEGA BLVD.
200
M-115
Investigations for Prior ACE Phase :
280
C-303
E-122
G-131
G-132
E-123
ELEVATION
FileName=> G:\4953_Geotech\2011\111423 Westside - Post APE\CAD\DWG\Report_13.11.05\4953-11-1423_Tail-Track_Plate-1.dwg [Plate-1]
UserName: vo.nguyen Nov 14, 2013 @ 5:56pm
Begin 575+05
End 583+22
TAIL TRACK
220
NO. 10 DOUBLE CROSSOVER
Dual Geotechnical Boring/ Gas Monitoring Well
CB-104
300
240
Cross passage (profile view)
320
300
260
Site view showing center of tracks (blue), tunnel outlines (magenta dash) with
perpendicular lines for of cross passage
Investigations for PE Phase:
(P)
PLAN
280
Profile view of station (red) with tunnel outline (black) and track (blue)
based on plans dated October, 2013
Gas Monitoring Well
G-126/M-116
320
Site view of station. Alignment based on plans dated October, 2013
Environmental Exploration with Soil Gas Probes
G-313/M-301
G-12
E-12
C-303
E-122A
0
E-12
Symbols Legend:
?
4/27/11
Qalo
4/22/11
Boring / CPT with shear wave velocity measurements
5/24/11
?
4/14/11
(S-Wave)
120
Boring with pressuremeter testing
5/18/11
?
100
Changes in the geologic contacts, groundwater depth, explanations field or
laboratory data and due to additional data obtained from borings drilled in 2013
100
80
80
TD=65'
TD=65'
TD=65'
TD=65'
TD=70.5'
TD=70'
TD=70'
60
TD=76' TD=76'
TD=81.5'
TD=85'
TD=91'
TD=75'
No. 10
DOUBLE CROSSOVER
60
TD=90'
40
40
WILSHIRE / LA CIENEGA
STATION
SAN PEDRO FM (Qsp)
TD=111.5'
TD=111'
TD=120'
20
TD=121.5'
TD=127'
TD=115'
TD=121'
TD=122'
20
TD=120'
0
0
584+00
584+00
583+00
582+00
581+00
580+00
579+00
578+00
577+00
576+00
575+00
574+00
573+00
572+00
571+00
570+00
569+00
568+00
567+00
566+00
565+00
564+00
517+00
563+00
Reference: Proposed Tunnel Alignment and Station Plan and Profile dated October, 2013
PROFILE:
DESIGNED BY
WL
DRAWN BY
VMN
CHECKED BY
WL / HP
IN CHARGE
MBH / PM
H=200', V=40'
VERTICAL EXAGGERATION = 5:1
CONTRACT NO
LOS ANGELES COUNTY
METROPOLITAN TRANSPORTATION AUTHORITY
WESTSIDE SUBWAY EXTENSION
ADVANCED PRELIMINARY ENGINEERING
EXPLORATION PLAN AND PROFILE
DRAWING NO
PLATE 1
SCALE
AS NOTED
TAIL TRACK
SHEET NO
DATE
REV
DATE
BY
APP
DESCRIPTION
11/5/2013
STATION 575+05 to 583+22
REV