ELEVATION (ft) 205 200 195 190 185 180 175 170 18.4 16.6 10.1 18.0 12.7 10.1 13.9 17 ML SM CL SM SW SM SP CL 2.2 0.5 0.0 1.1 1.4 11 31 26 34 104 - 111 - 120 - 110 18 15 41 7-inch thick Asphalt Concrete over 5-inch thick Portland Cement Concrete, 4-inch thick Base Course QUATERNARY YOUNGER ALLUVIUM [Qal] SANDY SILT - moist, brown, fine sand SILTY SAND - loose, moist, brown, fine to medium-grained, trace clay, trace fine gravel QUATERNARY OLDER ALLUVIUM [Qalo] SANDY LEAN CLAY - very stiff, moist, brown, fine sand SILTY SAND - medium dense, moist, orangish brown, fine to medium-grained, trace clay, trace fine gravel WELL GRADED SAND with GRAVEL - medium dense, moist, brownish gray, fine to coarse-grained, coarse slate gravel Becomes dark greenish gray, sandier seams SILTY SAND with GRAVEL - dense, very moist, fine to coarse-grained, fine gravel (up to 1/2 inch in size) POORLY GRADED SAND - medium dense, very moist, brown, fine to medium-grained, alternating Well Graded Sand, some fine gravel SAN PEDRO FORMATION [Qsp] LEAN CLAY with GRAVEL - moist, dark greenish gray SAMPLE LOC. Sta 628+70, Lt 11 feet HOLE DIAMETER 4-¼ inches GROUND EL. MOISTURE CONTENT (% of dry wt.) PERCENT PASSING No. 200 SIEVE DOWNHOLE TESTS OVA (ppm)** BLOW COUNT* (blows/ft) DRY DENSITY (pcf) "N" VALUE STD.PEN.TEST Tri County Drilling / CME 75 DRILLING METHOD Rotary Wash DATES DRILLED 5/9/2011 - 5/11/2011 GROUND-WATER READINGS Drilling mud bailed on 5/10/2011. Ground-water level measured at 32 feet below the ground surface on 5/11/2011. BOREHOLE LOCATION DRILLING COMPANY/DRILLING EQUIPMENT 209 feet G-142 LOG OF BORING BORING NO. LA METRO PB-TUNNEL ZONE S:\70131 GEOTECH\GINTW\LIBRARY MACTEC JUNE2011.GLB G:\PROJECT_DIRECTORIES\4953\2010\101561_METRO_WESTSIDE_EXTENSION\6.2.3.1 GEOTECHNICAL DESIGN\3.2 ALL FIELD NOTES\GINT LOG\NEW TEMPLATE - MARCH 14, 2011\4953-10-1561_(140-160).GPJ 10/18/11 DEPTH (ft) 5 10 15 20 25 30 35 40 THIS RECORD IS AN INTERPRETATION OF SUBSURFACE CONDITIONS AT THE EXPLORATION LOCATION. LATITUDE AND LONGITUDE OF BORING LOCATION SHOWN ON LOGS ARE APPROXIMATE. SUBSURFACE CONDITIONS AT OTHER LOCATIONS AND AT OTHER TIMES MAY DIFFER. INTERFACES BETWEEN STRATA ARE APPROXIMATE. TRANSITIONS BETWEEN STRATA MAY BE GRADUAL. Field Tech: JHD Prepared/Date: WL 6/28/2011 Checked/Date: LT 10/6/2011 Project No.: 4953-10-1561 (CONTINUED ON FOLLOWING FIGURE) Figure: A-2.38a MTA Westside Subway Extension Los Angeles, California
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Transcript
ELEV
ATI
ON
(ft)
205
200
195
190
185
180
175
170
18.4
16.6
10.1
18.0
12.7
10.1
13.9
17
ML
SM
CL
SM
SW
SM
SP
CL
2.2
0.5
0.0
1.1
1.4
11
31
26
34
104
-
111
-
120
-
110
18
15
41
7-inch thick Asphalt Concrete over 5-inch thick PortlandCement Concrete, 4-inch thick Base CourseQUATERNARY YOUNGER ALLUVIUM [Qal]SANDY SILT - moist, brown, fine sand
SILTY SAND - loose, moist, brown, fine to medium-grained,trace clay, trace fine gravel
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - very stiff, moist, brown, fine sand
SILTY SAND - medium dense, moist, orangish brown, fine tomedium-grained, trace clay, trace fine gravel
WELL GRADED SAND with GRAVEL - medium dense,moist, brownish gray, fine to coarse-grained, coarse slategravel
Becomes dark greenish gray, sandier seams
SILTY SAND with GRAVEL - dense, very moist, fine tocoarse-grained, fine gravel (up to 1/2 inch in size)
POORLY GRADED SAND - medium dense, very moist,brown, fine to medium-grained, alternating Well Graded Sand,some fine gravelSAN PEDRO FORMATION [Qsp]LEAN CLAY with GRAVEL - moist, dark greenish gray
SAM
PLE
LOC
.
Sta 628+70, Lt 11 feetHOLE DIAMETER4-¼ inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
Tri County Drilling / CME 75DRILLING METHODRotary WashDATES DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSDrilling mud bailed on 5/10/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/11/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
209 feet
G-142
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
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DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
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ATE
- M
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14,
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1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
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ITIO
NS
AT
OTH
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OC
ATI
ON
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ND
AT
OTH
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IMES
MA
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IFFE
R.
INTE
RFA
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BET
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TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
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S B
ETW
EEN
STR
ATA
MA
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E G
RA
DU
AL.
Field Tech: JHDPrepared/Date: WL 6/28/2011Checked/Date: LT 10/6/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.38aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
165
160
155
150
145
140
135
130
29.9
26.3
26.9
18.7
19.2
25.2
19.2
14.8
88
29
73
CL
MH
SM
CL
CL
0.5
0.0
2.4
2.3
2.9
2.0
2.9
21
44
33
43
-
102
-
109
-
99
-
116
17
13
23
57
LEAN CLAY - very stiff, very moist, dark bluish gray, tracegravel
Less gravel
ELASTIC SILT - stiff, moist, dark greenish gray, some fine tomedium sand
Becomes greenish gray to bluish gray
More fine gravel
SILTY SAND with GRAVEL - medium dense, moist, darkgreenish gray, fine to coarse-grained, fine gravel (up to 3/4inch in size)
Some clay, trace gravel
LEAN CLAY with SAND - very stiff, moist, dark greenishgray to bluish gray, fine sand, trace medium
LEAN CLAY with GRAVEL - hard, moist, dark gray, coarsegravel
Less gravel
Becomes very stiff, some gravel
Shale interbedded
SAM
PLE
LOC
.
Sta 628+70, Lt 11 feetHOLE DIAMETER4-¼ inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
Tri County Drilling / CME 75DRILLING METHODRotary WashDATES DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSDrilling mud bailed on 5/10/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/11/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
209 feet
G-142(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
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.2 A
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IELD
NO
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T LO
G\N
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: JHDPrepared/Date: WL 6/28/2011Checked/Date: LT 10/6/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.38bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
125
120
115
110
105
100
95
90
19.1
6.0
29.0
24.5
66CL
ML
CL
2.9
2.3
3.5
2.9
51
46
-
122
-
-
35
27
SANDY LEAN CLAY - hard, moist, dark gray, fine to coarsesand, some shale interbedded, trace fine gravel (up to 3/4 inchin size)
SANDY SILT with GRAVEL - hard, moist, dark greenishgray, gravel (up to 1/4 inch in size), trace clay
SANDY LEAN CLAY - very stiff, moist, dark greenish gray
Trace coarse gravel
Some siltEND OF BORING AT 96 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith asphalt concrete.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler 12inches using a 140 pound automatic hammer falling 30 inches
**Photo Ionization Detector used for OVA readings
SAM
PLE
LOC
.
Sta 628+70, Lt 11 feetHOLE DIAMETER4-¼ inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
Tri County Drilling / CME 75DRILLING METHODRotary WashDATES DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSDrilling mud bailed on 5/10/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/11/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
209 feet
G-142(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: JHDPrepared/Date: WL 6/28/2011Checked/Date: LT 10/6/2011
10-inch thick Asphalt Concrete over 5-inch thick PortlandCement Concrete and 3-inch thick Base CourseQUATERNARY YOUNGER ALLUVIUM [Qal]SANDY SILT - moist, brown, very fine sand
Some clay
SILTY SAND - medium dense, moist, light brown,fine-grained
LEAN CLAY with SAND - stiff, moist, light brown, fine sand
QUATERNARY OLDER ALUVIUM [Qalo]FAT CLAY with SAND - stiff, moist, brown, fine sand, tracemedium to coarse sand
Trace gravel (up to 3/8 inch in size)
Becomes very stiff, olive brown, some gravel
SILTY SAND - medium dense, moist, brown, fine-grained
CLAYEY GRAVEL with SAND - medium dense, moist, lightbrown, fine gravel (up to 3/4 inch in size), fine to mediumsand, trace coarse
SILTY CLAY - stiff, moist, olive brown, fine sand, some clay,trace gravel
LEAN CLAY with SAND - very stiff, moist, light brown, fineto coarse sand, trace gravel (up to 3/4 inch in size)
SAM
PLE
LOC
.
Sta 642+55, Lt 25 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED5/31/2011 - 6/1/2011GROUND-WATER READINGSGround-water level measured at 53 feet below the ground surface on 6/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
223 feet
G-144
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
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LL F
IELD
NO
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T LO
G\N
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 6/17/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.40aMTA Westside Subway Extension
Los Angeles, California
PMTW
ilshi
re /
Rod
eo S
tatio
n
ELEV
ATI
ON
(ft)
180
175
170
165
160
155
150
145
9.3
8.8
22.4
19.8
20.7
21.7
20.1
16.7
21
27
77
79
SM
SM
CL
43
26
25
25
-
113
-
110
-
100
-
112
85/10"
19
26
26
SILTY SAND with GRAVEL - very dense, moist, dark oliveyellow, fine to caorse-grained, some gravel (up to 1/2 inch insize)
SILTY SAND - medium dense, moist, dark olive yellow toolive brown, fine to medium-grained, some coarse, trace finegravel (up to 1/2 inch in size)
LEAN CLAY with SAND - very stiff, moist, olive brown, fineto medium sand
More sand
Some slate gravel
Fine sand, trace fine to coarse gravel (up to3/8 inch in size)
SAM
PLE
LOC
.
Sta 642+55, Lt 25 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED5/31/2011 - 6/1/2011GROUND-WATER READINGSGround-water level measured at 53 feet below the ground surface on 6/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
223 feet
G-144(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 6/17/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.40bMTA Westside Subway Extension
Los Angeles, California
PMT
PMT
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
140
135
130
125
120
115
110
105
15.3
12.1
11.9
21.6
10.4
13.7
17.6
7.9
33
72
29
SC
CL
SC
SC
SC
SM
46
31
41
81
-
117
-
104
-
110
-
126
39
75
40
51
Becomes hard, yellowish brown
CLAYEY SAND with GRAVEL - dense, moist, dark oliveyellow, fine to medium-grained, gravel (up to 1/2 inch in size)
Becomes very dense, fine to coarse-grained, gravel(up to 1 inch in size)
LEAN CLAY with SAND - very stiff, moist, dark olive, finesand, trace silt nodules
Trace gravel
CLAYEY SAND - dense, fine to medium-grained, trace finegravel (up to 1/2 inch in size)
CLAYEY SAND with GRAVEL - medium dense, moist,brownish gray, fine to coarse-grained, gravel (up to 1/2 inch insize)
SAN PEDRO FORMATION [Qsp]CLAYEY SAND - very dense, moist, greenish gray, fine tocoarse-grained, trace fine gravel (up to 3/4 inch in size)
SILTY SAND with GRAVEL - very dense, moist, greenishgray, fine to coarse-grained
SAM
PLE
LOC
.
Sta 642+55, Lt 25 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED5/31/2011 - 6/1/2011GROUND-WATER READINGSGround-water level measured at 53 feet below the ground surface on 6/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
223 feet
G-144(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
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JUN
E201
1.G
LBG
:\PR
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DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
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.3.1
GEO
TEC
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IELD
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 6/17/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.40cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
100
95
90
85
80
75
70
65
10.3 -50/3"
END OF BORING AT 121½ feet
NOTES:
Hand augered upper 5 feet due to utilities. Borehole groutedwith cement-bentonite slurry and patched with quick setcement.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
Downhole Test: PMT = Pressuremeter
SAM
PLE
LOC
.
Sta 642+55, Lt 25 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED5/31/2011 - 6/1/2011GROUND-WATER READINGSGround-water level measured at 53 feet below the ground surface on 6/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
223 feet
G-144(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
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G\N
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
125
130
135
140
145
150
155
160
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 6/17/2011Checked/Date: HP/PE 9/19/2011
4½-inch thick Asphalt Concrete over 12-inch thick PortlandCement ConcreteFILL [Af]SILTY SAND with GRAVEL - moist, brown
QUATERNARY YOUNGER ALLUVIUM [Qal]LEAN CLAY with SAND - very soft, moist, olive grayishbrown, fine to medium sand
Trace gravel (up to 3/8 inch in size)
FAT CLAY with SAND - stiff, moist, brown, fine to coarsesand, trace gravel (up to 1/2 inch in size)
POORLY GRADED GRAVEL - loose, moist, brown
POORLY GRADED GRAVEL with CLAY - loose, moist,brown, fine to coarse sand
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - very stiff, moist, brown, fine to coarsesand
Trace gravel (up to 1/2 inch in size)
(Sample not recovered)
Becomes stiff, trace gravel
SILTY SAND - dense, moist, light olive brown, fine tomedium-grained, some coarse, some fine gravel (up to 1/2 inchin size)
SAM
PLE
LOC
.
Sta 648+40, Lt 50 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/14/2011 - 4/15/2011GROUND-WATER READINGSDrilling mud bailed on 4/15/2011. Ground-water level measured at 71 feet belowthe ground surface on 4/18/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
231 feet
G-145
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: YN 6/20/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.41aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
190
185
180
175
170
165
160
155
-
5.6
16.0
-
19.5
-
-
17.4
14.8
-
20.4
-
20
73
61
70
SP-SM
CL
CL
CL
4
4
16
20
10
-
-
-
-
-
-
-
-
111
-
-
-
8
19
25
18
15
18
28
(Sample not recovered)
POORLY GRADED SAND - loose, moist, brown, fine tocoarse-grained, thin layers of Sandy Silt, trace fine gravel (upto 1/2 inch in size)SANDY LEAN CLAY - very stiff, moist, brown, some finegravel
(Sample not recovered)LEAN CLAY with SAND - very stiff, moist, brown, some finegravel (up to 3/4 inch in size)
(Sample not recovered)
(Sample not recovered)
Becomes stiff, with fine gravel
SANDY LEAN CLAY - very stiff, moist, brown, trace clay,trace gravel (up to 1/2 inch in size)
(Sample not recovered)
(Sample not recovered)
SAM
PLE
LOC
.
Sta 648+40, Lt 50 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/14/2011 - 4/15/2011GROUND-WATER READINGSDrilling mud bailed on 4/15/2011. Ground-water level measured at 71 feet belowthe ground surface on 4/18/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
231 feet
G-145(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: YN 6/20/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.41bMTA Westside Subway Extension
Los Angeles, California
NV
NV
NV
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
150
145
140
135
130
125
120
115
5.5
17.5
19.2
10.5
20.5
19.0
3.5
22.5
16
50
78
SM
SM
SP-SM
SM
SM
SM
SP
CL
CL
69
30
17
27
115
-
105
-
101
-
112
-
74/11"
60
67
37
SILTY SAND with GRAVEL - very dense, moist, brown, fineto coarse-grained, gravel (up to 1/2 inch in size)
SILTY SAND - very dense, moist, light brownish gray, fine tomedium-grained, iron oxide stains, trace gravel (up to 3/4 inchin size), trace clay
POORLY GRADED SAND with SILT and GRAVEL -medium dense to dense, moist, light brownish gray, fine tocoarse-grained, gravel (up to 1/4 inch in size)
SILTY SAND with GRAVEL - very dense, moist, olive yellow,fine to medium-grained, slate gravel (up to 1½ inch in size)
SAN PEDRO FORMATION [Qsp]SILTY SAND - medium dense, moist, olive, fine sand, tracegravel (up to 3/8 inch in size)
Thin layer of Sandy Silt
SILTY SAND - very dense, brown, fine-grained, iron oxidestains, trace gravelPOORLY GRADED SAND - very dense, moist, brown, fine tomedium-grained
LEAN CLAY with SAND - very stiff, moist, gray to lightbrown, trace gravel (up to 3/8 inch in size)
SANDY LEAN CLAY - hard, moist, gray, fine sand, somemedium
SAM
PLE
LOC
.
Sta 648+40, Lt 50 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/14/2011 - 4/15/2011GROUND-WATER READINGSDrilling mud bailed on 4/15/2011. Ground-water level measured at 71 feet belowthe ground surface on 4/18/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
231 feet
G-145(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: YN 6/20/2011Checked/Date: HP/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.41cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
110
105
100
95
90
85
80
75
15.7SC
26118SANDY LEAN CLAY - very stiff, moist, gray, fine to mediumsand, trace fine gravelEND OF BORING AT 121 FEET
NOTES:
Hand augered upper 8 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith quick set cement.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 380 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
Downhole Test: NV = Noise/Vibration
SAM
PLE
LOC
.
Sta 648+40, Lt 50 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/14/2011 - 4/15/2011GROUND-WATER READINGSDrilling mud bailed on 4/15/2011. Ground-water level measured at 71 feet belowthe ground surface on 4/18/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
231 feet
G-145(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
125
130
135
140
145
150
155
160
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: YN 6/20/2011Checked/Date: HP/PE 9/19/2011
9-inch thick Asphalt Concrete over 5-inch thick PortlandCement Concrete and 3-inch thick Base CourseQUATERNARY YOUNGER ALLUVIUM [Qal]SANDY SILT - moist, light brown, fine sand
SILTY SAND - moist, light brown, fine to medium-grained,trace slate gravel
SANDY SILTY CLAY - medium stiff, moist, brown, finesand, trace coarse, rootlets (up to 1/4 inch in size)Trace gravelQUATERNARY OLDER ALLUVIUM [Qalo]SILTY CLAY - stiff, moist, dark olive, some fine sand, traceslate gravel
(Sample not recovered)
SANDY LEAN CLAY - very stiff, moist, brown, fine sand,trace coarse, trace calcium carbonate nodules, tracemagnesium nodules
Becomes hard. dark olive, fine to medium sand, trace gravel
Becomes very stiff, olive brown to brown, fine sand, tracemedium
SILTY SAND - medium dense, moist, brown, fine tomedium-grained, some coarse, trace gravel
POORLY GRADED SAND with SILT - medium dense, moist,brown, fine to coarse-grained, trace gravel
Some slate fragments (up to 3 inches in size)
POORLY GRADED SAND - dense, moist, brown to yellowishbrown, fine to coarse-grained, fine to coarse gravel (up to 1inch in size), trace clay, trace micaAlternating with thin layers of Silt
SAM
PLE
LOC
.
Sta 652+80, Lt 20 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/21/2011 and 5/5/2011GROUND-WATER READINGSDrilling mud bailed on 4/21/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/5/2011 (after two weeks).
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
239 feet
G-146
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 9/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.42aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
195
190
185
180
175
170
165
160
19.1
12.4
16.7
21.5
17.1
17.0
21.3
19.0
29.6
24.0
15.7
20.3
16.7
58
64
90
SM
ML
CL-ML
CL
ML
CL
CL
ML
0.0
3.1
3.2
2.5
0.5
2.7
0.5
2.9
1.4
4.3
7.9
9.2
7.9
22
13
27
24
19
34
-
118
-
101
-
111
-
107
-
101
-
108
-
16
20
23
17
23
36
25
SILTY SAND - medium dense, moist, brown, fine tomedium-grained, trace coarse
SANDY SILT - very stiff, moist, dark olive, fine to coarsesand, trace fine gravel (up to 3/8 inch in size)
SILTY CLAY - stiff, moist, dark brown, some fine sand, tracemedium to coarse, trace fine gravel (up to 1/4 inch in size)
SANDY LEAN CLAY - very stiff, moist, olive brown, finesand, trace medium and coarse, trace fine gravel (up to 1/4inch in size)
More sand, slate gravel (up to ½ inch in size)
Thin layer of Silty Sand, olive brown, fine to medium-grained
SILT - very stiff, wet, dark olive, trace fine sand, some clay
SANDY LEAN CLAY - very stiff, moist, dark brown to olivebrown, fine sandThin layers of Silt and Sandy Silt
LEAN CLAY - very stiff, moist, olive brown, trace fine sand
SANDY SILT - hard, moist, dark olive, very fine to fine sand,trace fine gravel (up to ½ inch in size)
Becomes very stiff, trace fine to coarse gravel (up to ¾ inch insize)
Becomes olive yellow to dark olive, some clay
SAM
PLE
LOC
.
Sta 652+80, Lt 20 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/21/2011 and 5/5/2011GROUND-WATER READINGSDrilling mud bailed on 4/21/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/5/2011 (after two weeks).
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
239 feet
G-146(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 9/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.42bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
120
17.7
22.4
24.7
11.2
13.7
14.4
9.4
75
17
CL
SM
ML
SM
SW-SM
7.2
5.4
5.7
6.1
5.6
5.9
5.4
33
28
63
80/6"
112
-
99
-
116
-
129
49
75
53/6"
LEAN CLAY with SAND - very stiff, moist, olive yellow todark olive, fine sand
Becomes hard, trace fine gravel (up to ½ inch in size)
Coarse gravel (up to 3 inches in size)
Some medium sand and fine gravel (up to ¼ inch in size)
Thin layer of Sandy Silt, brown, fine sandSILTY SAND - very dense, moist, dark olive brown, fine tocoarse-grained, trace fine gravel (up to ½ inch in size)
SILT - moist, brown, trace gravel
SILTY SAND with GRAVEL - very dense, moist, brown,fine-grainedWELL GRADED SAND with SILT and GRAVEL - verydense, moist to wet, olive brown, fine to coarse-grained, finegravel (up to ½ inch in size), alternating with layer of PoorlyGraded Sand
Becomes dark olive to dark olive yellow, more clay, fine gravel(up to 3/4 inch in size)
END OF BORING AT 105 FEET
NOTES:
Hand augered upper 5 feet due to utilities. Borehole groutedwith cement bentonite slurry and patched with asphaltconcrete.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
SAM
PLE
LOC
.
Sta 652+80, Lt 20 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED4/21/2011 and 5/5/2011GROUND-WATER READINGSDrilling mud bailed on 4/21/2011. Ground-water level measured at 32 feet belowthe ground surface on 5/5/2011 (after two weeks).
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
239 feet
G-146(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: YN 9/21/2011Checked/Date: LT/PE 9/26/2011
6-inch thick Asphalt Concrete over 10-inch thick PortlandCement Concrete, No Base CourseQUATERNARY YOUNGER ALUVIUM [Qal]SANDY SILT - moist, dark brown, fine sand
Thin layers of Lean Clay
SILTY SAND - loose, dark brown, fine to medium-grained,slightly porous
LEAN CLAY - very stiff, moist, dark brown, trace gravel
QUATERNARY OLDER ALUVIUM [Qalo]SILTY SAND with GRAVEL - medium dense, moist, orangebrown to brown, fine to medium-grained
SANDY LEAN CLAY - very stiff, moist, dark orangishbrown, fine to medium sand
SILTY GRAVEL with SAND - dense, moist, brownish gray,shale gravel, some quartz gravel, fine to coarse sand
10-inch thick Asphalt Concrete over 6-inch thick PortlandCement Concrete and 4-inch thick Base CourseFILL [Af]SANDY SILT - moist, brown, trace gravel
QUATERNARY YOUNGER ALLUVIUM [Qal]SILT with SAND - very stiff, moist, dark olive brown, fine tomedium sand, some clay
SILTY SAND with GRAVEL - medium dense, moist, gray,fine to medium-grained, some coarse, slate gravel (up to 1 inchin size)
SILT with SAND - soft, moist, olive brown, very fine sand,trace gravel, some clay
SILTY SAND - medium dense, moist, light brown and gray,fine-grained, trace gravel (up to 1 inch in size)
Becomes brown, fine to medium-grained, with thinlayers of Sandy Silt
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - hard, moist, brown to gray, fine tocoarse sand, slate gravel (up to 3/4 inch in size)
SILT with SAND - stiff, moist, olive brown to gray, with thinlayers of fine sand, some clay
SAM
PLE
LOC
.
Sta 670+60, Lt 5 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/2/2011 - 2/5/2011GROUND-WATER READINGSDrilling mud bailed on 2/4/2011. Ground-water level measured at 33 feet belowthe ground surface on 2/5/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
258 feet
G-149
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.45aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
215
210
205
200
195
190
185
180
23.6
20.8
18.1
14.9
20.9
24.0
16.4
12.9
12.6
22.2
-
23.9
24.4
28.4
25.9
62
35
32
86
49
SM
ML
ML
CL
SM
ML
SM
CL
SM
CL
2.3
1.9
4.3
0.7
2.3
7.5
1.4
5.8
2.1
1.7
1.2
2.1
1.5
2.7
29
22
28
40
81
45
39
40
-
107
106
-
105
-
114
-
122
-
-
-
101
-
97
13
21
28
93
23
24
27
Gray to brown, trace fine sand, trace ironoxide stains
Becomes olive graySILTY SAND - medium dense, wet, brown, fine tocoarse-grained, trace gravel (up to 1/4 inch in size)
SANDY SILT - very stiff, moist, olive gray, very fine sand,trace gravel
SILT with SAND - very stiff, moist, olive gray, trace gravel (upto 1/4 inch in size), some clay
Iron oxide stains
LEAN CLAY - very stiff, moist, reddish brown to gray, withthin layer of sand
SILTY SAND with GRAVEL - dense, wet, brown and gray,fine-grained, gravel (up to 3/4 inch in size)
SANDY SILT with GRAVEL - hard, moist, olive gray, finesand, some coarse, gravel (up to 1/2 inch in size)SILTY SAND - very dense, moist, brown, fine tocoarse-grained, trace gravel (up to 1/2 inch in size), trace clay
LEAN CLAY - very stiff, moist, dark brown, trace sand, tracegravel (up to 3/8 inch in size)
(Sample not recovered)
Dark brown to gray
SILTY SAND - dense, moist, brown, trace gravel (up to 3/8inch in size), some clay
LEAN CLAY - very stiff to hard, moist, dark brown to gray
SAM
PLE
LOC
.
Sta 670+60, Lt 5 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/2/2011 - 2/5/2011GROUND-WATER READINGSDrilling mud bailed on 2/4/2011. Ground-water level measured at 33 feet belowthe ground surface on 2/5/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
258 feet
G-149(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.45bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
175
170
165
160
155
150
145
140
15.4
17.6
13.5
15.8
28.0
19.3
31.4
24.0
17.9
24.0
12.0
52
56
SC
SM
ML
SM
SM
1.9
2.9
2.7
1.4
1.7
1.3
1.5
0.9
1.2
43
50
46
70
73
-
110
-
110
-
100
-
101
-
101
-
43
88
32
34
62
92/10"
Becomes Sandy Lean Clay, gravel (up to 3/8 inch in size)
CLAYEY SAND with GRAVEL - very dense, brown, gravel(up to 1 inch in size)SILTY SAND - very dense, moist, brown, fine tocoarse-grained, with gravel
Thin layers of Clay
SILT - hard, moist, brown to gray, with thin layers of sand,some clay
Thin layer of Silty Sand, brown, fine to medium-grained
Thin layer of Lean Clay, dark brown
Becomes dark brown
SILTY SAND with GRAVEL - very dense, wet, brown, fine tocoarse-grained, gravel (up to 1/4 inch in size)
SILTY SAND - very dense, wet, brown, fine tomedium-grained, trace gravel (up to 1 inch in size)
Becomes fine-grained
Coarse gravel layer
Becomes fine to coarse-grained, trace gravel(up to 1/2 inch in size)
END OF BORING AT 111½ FEETNOTES:Hand augered upper 5 feet due to utilities. Borehole groutedwith cement-bentonite slurry and patched with asphaltconcrete.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
SAM
PLE
LOC
.
Sta 670+60, Lt 5 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/2/2011 - 2/5/2011GROUND-WATER READINGSDrilling mud bailed on 2/4/2011. Ground-water level measured at 33 feet belowthe ground surface on 2/5/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
258 feet
G-149(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
POORLY GRADED GRAVEL - loose, moist, slate gravelfragments (up to 3/4 inch in size), with sandQUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - very stiff, moist, reddish brown, tracegravel (up to 1/4 inch in size), iron oxide stains
Trace gravel (up to 3/8 inch in size)
LEAN CLAY - very stiff, moist, dark brown
POORLY GRADED SAND - medium dense, moist, brown,fine to coarse-grained, trace fine gravel
CLAYEY SAND - medium dense, moist, brown
SAM
PLE
LOC
.
Sta 674+70, Lt 15 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/2/2011GROUND-WATER READINGSDrilling mud bailed on 2/2/2011. Ground-water level measured at 22 feet belowthe ground surface 30 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
265 feet
G-150
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.46aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
220
215
210
205
200
195
190
18.1
21.6
23.9
18.4
14.8
23.7
35
75
41
24
78
CL
SM
CL
SC
SM
CH
0.0
0.0
0.0
0.0
0.3
0.0
26
28
53
27
-
106
-
110
113
102
20
20
Becomes gray to brown, fine to coarse-grained,trace fine gravel (up to 3/8 inch in size)
LEAN CLAY - very stiff, moist, olive brown, trace sand, tracegravel (up to 1/4 inch in size)
SILTY SAND with GRAVEL - medium dense, moist, gray tobrown, fine to coarse-grainedLEAN CLAY with SAND - very stiff, moist, gray
CLAYEY SAND - medium dense, moist, brown to grayishbrown, trace slate gravel (up to 1-1/2 inches in size)
Trace gravel (up to 1/2 inch in size)
SILTY SAND - very dense, moist, brown, fine tomedium-grained, some coarse, trace gravel
Trace gravel (up to 3/8 inch in size)
SANDY FAT CLAY - very stiff, moist, dark brown and gray
SAM
PLE
LOC
.
Sta 674+70, Lt 15 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/2/2011GROUND-WATER READINGSDrilling mud bailed on 2/2/2011. Ground-water level measured at 22 feet belowthe ground surface 30 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
265 feet
G-150(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.46bMTA Westside Subway Extension
Los Angeles, California
PMT
PMT
Tun
nel
ELEV
ATI
ON
(ft)
180
175
170
165
160
155
150
29.5
18.3
19.7
18.4
22.5
26
SM
SM
SP
CL
0.3
0.0
0.0
0.0
0.1
27
35
45
75
93
-
103
-
103
66
SILTY SAND - medium dense, wet, gray to brown, fine tomedium-grained
Becomes very dense, brown
SILTY SAND with GRAVEL - dense, moist, brown, fine tocoarse-grained, gravel (up to 1/4 inch in size)
POORLY GRADED SAND - dense, wet, gray to brown, fineto medium-grained, some coarse sand(Sample disturbed)
SANDY LEAN CLAY - hard, moist, brown
END OF BORING AT 111 FEETNOTES:Hand augered upper 5 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith asphalt concrete.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 340 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readingsDownhole Test: PMT = Pressuremeter
SAM
PLE
LOC
.
Sta 674+70, Lt 15 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/2/2011GROUND-WATER READINGSDrilling mud bailed on 2/2/2011. Ground-water level measured at 22 feet belowthe ground surface 30 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
265 feet
G-150(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
5-inch thick Asphalt Concrete over 6-inch thick PortlandCement Concrete and 4-inch thick Base CourseFILL [Af]SILTY SAND - moist, light brown to brown, fine tomedium-grained, some coarse, trace slate gravel
QUATERNARY YOUNGER ALLUVIUM [Qal]SILTY SAND - moist, brown, fine to medium-grained
LEAN CLAY - stiff, moist, dark olive brown, trace slate gravel(up to 1/4 inch in size)
QUATERNARY OLDER ALLUVIUM [Qalo]LEAN CLAY - medium stiff, olive brown
SILTY SAND - loose, moist, olive brown, fine tomedium-grained, some coarse, some gravelSILT - moist, olive brown, some clay
WELL GRADED SAND with SILT - medium dense, moist,gray, fine to coarse-grained, some gravel (up to 1/2 inch insize)
SILTY SAND - medium dense, moist, olive brown, fine tomedium-grained, some coarse
SANDY SILT - medium stiff, moist, gray, with sand lenses
SILTY SAND - loose, moist, gray, fine to medium-grained,trace gravel
SAM
PLE
LOC
.
Sta 683+20, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/1/2011GROUND-WATER READINGSDrilling mud bailed on 2/1/2011. Ground-water level measured at 37 feet belowthe ground surface 20 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
271 feet
G-152
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.47aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
230
225
220
215
210
205
200
195
15.6
-
8.3
10.8
10.3
4.9
30.9
19.2
18.8
23.9
22.2
27.4
15.3
16
39
59
82
64
50
SW
SM
ML
SM
CL
CH
CL
3.0
8.5
8.7
3.0
9.6
5.1
4.5
7.0
3.7
3.7
57
38
55
49
10
29
54
67
57
107
-
-
116
-
116
88
-
99
97
-
95
112
44
50/6"
28
22
Becomes wet, brownish gray, some coarse sandWELL GRADED SAND with GRAVEL - dense, wet, brown,fine to coarse-grained
(Sample not recovered)
Becomes gray, gravel (up to 1 inch in size)
SILTY SAND with GRAVEL - very dense, very moist, brown,fine to coarse-grained, gravel (up to 3/4 inch in size)
SILT - hard, moist, reddish brown
SILTY SAND - loose, wet, light to dark brown, fine tomedium-grained, some coarse, trace gravel (up to 1/2 inch insize), with thin layers of Clayey Silt
Slate gravel (up to 1 inch in size)
Becomes medium dense, thin layer of Well Graded Sandwith gravel (up to 1 inch in size)
SANDY LEAN CLAY - very stiff, moist, olive brown, tracegravel (up to 1/2 inch in size), with thin layers of Silty Sand
Becomes hard
FAT CLAY - very stiff, moist, dark and reddish brown, tracesand, trace gravel
Becomes hard
SANDY LEAN CLAY - hard, moist, brown, trace gravel (upto 3/8 inch in size)
SAM
PLE
LOC
.
Sta 683+20, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/1/2011GROUND-WATER READINGSDrilling mud bailed on 2/1/2011. Ground-water level measured at 37 feet belowthe ground surface 20 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
271 feet
G-152(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.47bMTA Westside Subway Extension
Los Angeles, California
NV
NV
NV
Tun
nel
ELEV
ATI
ON
(ft)
190
185
180
175
170
165
160
155
14.0
11.1
13.3
20.0
19.5
15.0
17.1
21.8
15.1
14.5
26SC
SM
SW
MH
CL
ML
SW
SP
SM
1.4
6.5
3.6
5.8
4.3
4.9
4.3
2.9
3.2
75
45
52
42
49
-
123
-
105
-
115
-
105
-
117
55
50/5"
41
42
59
CLAYEY SAND with GRAVEL - very dense, wet, brown, fineto medium-grained, some coarse, gravel (up to 1 inch in size)
Increase in gravel content
SILTY SAND - very dense, very moist, brown, fine tocoarse-grained, gravel (up to 1/4 inch in size)WELL GRADED SAND - very dense, wet, gray, fine tocoarse-grained, with gravel (up to 3/4 inch in size)
SANDY LEAN CLAY - hard, moist, brown, with gravel (up to1/4 inch in size)
SANDY SILT - hard, moist, brown, some clay
WELL GRADED SAND - wet, brown, fine to coarse-grained,with gravel (up to 1/4 inch in size)
POORLY GRADED SAND - very dense, moist, fine tocoarse-grained, trace gravel (up to 1/4 inch in size)
SILTY SAND - dense, moist, reddish brown, fine tocoarse-grained, trace gravelEND OF BORING AT 111 FEETNOTES:Hand augered upper 9 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith asphalt concrete.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readingsDownhole Test: NV = Noise/Vibration
SAM
PLE
LOC
.
Sta 683+20, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED1/31/2011 - 2/1/2011GROUND-WATER READINGSDrilling mud bailed on 2/1/2011. Ground-water level measured at 37 feet belowthe ground surface 20 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
271 feet
G-152(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
18/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/19/2011
8-inch thick Grass Surface, No Base CourseFILL [Af]SILTY SAND - moist, brown, fine to medium-grained, somegravel, layer of base course
QUATERNARY YOUNGER ALLUVIUM [Qal]SILTY SAND with GRAVEL - loose, moist, brownish red,fine to coarse-grained, fine gravel (up to 1/4 inch in size)
Becomes medium dense, trace gravel
SANDY LEAN CLAY - stiff, moist, brown, fine to mediumsand
CLAYEY SAND - loose, moist, brown, fine tomedium-grained, some coarseQUATERNARY OLDER ALLUVIUM [Qalo]SILTY CLAY - stiff, moist, brown, trace fine sand
SILTY SAND - medium dense, moist, olive brown, fine tomedium-grained, some coarse, trace fine gravel (up to 1/2 inchin size)
SILT - stiff, moist, brown, some fine sand, thin layers of SiltyClay
SILTY SAND - medium dense, moist, brown, fine tomedium-grained, some gravel (up to 1/4 inch in size)
Trace gravel (up to 1/2 inch in size)
SILT - stiff, moist, brown, some fine sand, some clay
FAT CLAY - very stiff, moist, dark brown, trace fine sand
LEAN CLAY with SAND - hard, moist, brown, very finesand, trace fine gravel
SAM
PLE
LOC
.
Sta 706+80, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/14/2011 - 2/15/2011GROUND-WATER READINGSGround-water level measured at 27 feet and 45 feet below the ground surface inshallow and deep monitoring wells, respectively on 6/10/2011. See last page ofthis boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
282 feet
G-156
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
24/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/29/2011Checked/Date: LT/PE 9/20/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.49aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
240
235
230
225
220
215
210
205
26.4
-
26.6
16.2
18.3
14.5
22.0
7.2
13.0
13.5
15.2
9.4
21.2
23.5
2.1
15.5
82
63
58
21
19
28
CL
SM
ML
SM
GW
SM
CL-ML
SM
ML
2.8
3.6
1.0
2.3
1.0
2.8
1.5
2.5
1.4
2.1
1.0
2.4
0.8
1.5
0.8
26
46
51
65/6"
75/6"
100/10"
47
38
-
-
-
110
-
113
-
118
-
112
-
123
-
96
-
116
23
25
25
92/11"
76
81
65
57/6"
Becomes very stiff
(Sample not recovered)
SANDY LEAN CLAY - hard, moist, light brown, fine sand
Very stiff, trace gravel (up to 3/8 inch in size)
SILTY SAND - dense, very moist, brown, fine tomedium-grained, some coarseSANDY SILT - moist, brown, fine sand
SILTY SAND with GRAVEL - very dense, very moist, brown,fine to coarse-grained, gravel (up to 1/4 inch in size)
Gravel (up to 1 inch in size)
Gravel (up to 3/4 inch in size)
WELL GRADED GRAVEL - very dense, wet, fine tocoarse-grained, gravel (up to 1 inch in size)
SILTY SAND - very dense, wet, brown, fine to coarse-grained,trace gravel (up to 1/2 inch in size)
SILTY CLAY - hard, moist, grayish brown, trace fine sand
SILTY SAND with GRAVEL - very dense, moist, brown, fineto medium-grained, slate gravel (up to 2 inches in size)
SILT - hard, wet, grayish dark brown, trace fine sand, tracegravel, some clay
SAM
PLE
LOC
.
Sta 706+80, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/14/2011 - 2/15/2011GROUND-WATER READINGSGround-water level measured at 27 feet and 45 feet below the ground surface inshallow and deep monitoring wells, respectively on 6/10/2011. See last page ofthis boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
282 feet
G-156(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
24/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/29/2011Checked/Date: LT/PE 9/20/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.49bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
165
17.1
23.5
15.6
12.9
-
6.9
21.7
23.5
8.9
CL-ML
CL
SW
ML
CL-ML
CL
2.1
0.8
2.5
0.5
0.7
1.9
1.0
1.5
60
46
81
50
-
101
-
108
-
122
-
100
-
27
41
50
41
28
SILTY CLAY - very stiff, moist, gray, with layers of Silt
Becomes hard
Trace gravel
SANDY LEAN CLAY - hard, moist, light brown, fine sand
(Sample not recovered)
WELL GRADED SAND with GRAVEL - very dense, wet,dark gray, fine to coarse-grained
SANDY SILT - moist, brown to gray, fine sand
SILTY CLAY - hard, moist, brown to gray
Alternating with clay layers
Thin layer of Silty Sand, brown
SANDY LEAN CLAY - hard, moist, gray and brown, finesand
Some gravel
SAM
PLE
LOC
.
Sta 706+80, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/14/2011 - 2/15/2011GROUND-WATER READINGSGround-water level measured at 27 feet and 45 feet below the ground surface inshallow and deep monitoring wells, respectively on 6/10/2011. See last page ofthis boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
282 feet
G-156(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
24/1
1
DEP
TH (f
t)
85
90
95
100
105
110
115
120
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/29/2011Checked/Date: LT/PE 9/20/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.49cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
160
155
150
145
140
135
130
125
11.21.4 70121Becomes hard
END OF BORING AT 121 FEET
NOTES:
Montoring well was installed on 2/15/2011. See wellconstruction diagram for G-156.
"N" Value Standard Penetration Test: Number of blowsrequired to drive the SPT sampler 18 inches using a140 pound automatic hammer falling 30 inches
*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readingsSA
MPL
E LO
C.
Sta 706+80, Lt 40 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/14/2011 - 2/15/2011GROUND-WATER READINGSGround-water level measured at 27 feet and 45 feet below the ground surface inshallow and deep monitoring wells, respectively on 6/10/2011. See last page ofthis boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
282 feet
G-156(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
140-
160)
.GPJ
10/
24/1
1
DEP
TH (f
t)
125
130
135
140
145
150
155
160
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: ARPrepared/Date: JF 3/29/2011Checked/Date: LT/PE 9/20/2011
Becomes medium dense, some gravel(Sample not recovered)
SAM
PLE
LOC
.
Sta 681+50, Rt 20 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/3/2011 - 2/4/2011GROUND-WATER READINGSDrilling mud bailed on 2/4/2011. Ground-water level measured at 29 feet belowthe ground surface 30 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
258 feet
G-161
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
161-
181)
.GPJ
10/
18/1
1
DEP
TH (f
t)
5
10
15
20
25
30
35
40
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/20/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.51aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
215
210
205
200
195
190
185
180
18.0
-
10.8
28.0
16.9
23.0
17.9
24.1
19
17
80
SP
ML
SC
ML
SM
CL
CL
0.0
0.2
0.0
0.0
0.1
0.0
0.0
30
11
28
30
-
-
-
93
-
102
-
102
25
62
50
38
SILTY SAND with GRAVEL - medium dense, moist to wet,grayish brown, fine to medium-grained, gravel (up to 1/4 inchin size), with layers of Poorly Graded Sand
(Sample not recovered)
Becomes very dense, dark gray, gravel (up to 1 inch in size)
POORLY GRADED SAND - medium dense, moist, brown,fine to medium-grained
SILT - stiff, moist, brown, trace sand
CLAYEY SAND - moist, olive brown, fine-grained
SILT - hard, moist, olive brown to olive gray
SILTY SAND - wet, olive gray
LEAN CLAY - very stiff, moist, olive gray, trace sand
Becomes hard, gray, trace gravel (up to 1/4 inch in size)
LEAN CLAY with SAND - very stiff, moist, gray, fine sand
SAM
PLE
LOC
.
Sta 681+50, Rt 20 feetHOLE DIAMETER4-7/8 inches
GROUND EL.
MO
ISTU
RE
CO
NTE
NT
(% o
f dry
wt.)
PER
CEN
T PA
SSIN
GN
o. 2
00 S
IEV
E
DO
WN
HO
LE T
ESTS
OV
A (p
pm)*
*
BLO
W C
OU
NT*
(blo
ws/
ft)
DR
Y D
ENSI
TY(p
cf)
"N"
VA
LUE
STD
.PEN
.TES
T
C & L Drilling / Mayhew 1000DRILLING METHODRotary WashDATES DRILLED2/3/2011 - 2/4/2011GROUND-WATER READINGSDrilling mud bailed on 2/4/2011. Ground-water level measured at 29 feet belowthe ground surface 30 minutes after bailing of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
258 feet
G-161(Continued)
LOG OF BORING
BORING NO.LA
MET
RO
PB
-TU
NN
EL Z
ON
E S
:\701
31 G
EOTE
CH
\GIN
TW\L
IBR
AR
Y M
AC
TEC
JUN
E201
1.G
LBG
:\PR
OJE
CT_
DIR
ECTO
RIE
S\49
53\2
010\
1015
61_M
ETR
O_W
ESTS
IDE_
EXTE
NSI
ON
\6.2
.3.1
GEO
TEC
HN
ICA
L D
ESIG
N\3
.2 A
LL F
IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
161-
181)
.GPJ
10/
18/1
1
DEP
TH (f
t)
45
50
55
60
65
70
75
80
THIS
REC
OR
D IS
AN
INTE
RPR
ETA
TIO
N O
F SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
THE
EXPL
OR
ATI
ON
LO
CA
TIO
N. L
ATI
TUD
E A
ND
LO
NG
ITU
DE
OF
BO
RIN
G L
OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
XIM
ATE
.SU
BSU
RFA
CE
CO
ND
ITIO
NS
AT
OTH
ER L
OC
ATI
ON
S A
ND
AT
OTH
ER T
IMES
MA
Y D
IFFE
R.
INTE
RFA
CES
BET
WEE
N S
TRA
TA A
RE
APP
RO
XIM
ATE
. TR
AN
SITI
ON
S B
ETW
EEN
STR
ATA
MA
Y B
E G
RA
DU
AL.
Field Tech: DWPrepared/Date: JF 3/31/2011Checked/Date: LT/PE 9/20/2011