Preliminary Geotechnical and Environmental Report
Appendix A – Geotechnical Investigation
W E S T S I D E S U B W A Y E X T E N S I O N P R O J E C T December 21, 2011
APPENDIX A GEOTECHNICAL INVESTIGATION
Preliminary Geotechnical and Environmental Report
Appendix A – Geotechnical Investigation
W E S T S I D E S U B W A Y E X T E N S I O N P R O J E C T December 21, 2011
FIGURE A-1.0 UNIFIED SOIL CLASSIFICATION SYSTEM
5 - 82 - 4
SILT & CLAY
LooseVery Loose
3 - 78 - 1314 - 2325 - 47Over 47 Hard
Very StiffStiff
Medium StiffSoft
Very Soft
SPT Sampler (140-lb hammer, 30-inch drop)
BouldersCobblesCoarseFineCoarse
GRAVELSAND
Clayey gravels, gravel - sand - claymixtures.
GW
NV
PMT
Very DenseDense
Medium Dense17 - 4748 - 77Over 77
0 - 2TAR IMPACTED SOILS
SAND & GRAVELNo. of Blows
0 - 45 - 1011 - 3031 - 50Over 50 Very Dense
DenseMedium Dense
Loose
Relative DensityVery Loose
No. of Blows0 - 1
ConsistencyVery Soft
SoftMedium Stiff
StiffVery Stiff
HardOver 3016 - 309 - 15
SILT OR CLAYFine Medium
12"3"3/4"No.4No.10No.40No.200U.S. STANDARD SIEVE SIZE
0 - 7
Reference: The Unified Soil Classification System, Corps of Engineers, U.S. Army TechnicalMemorandum No. 3-357, Vol. 1, March, 1953 (Revised April, 1960)
Poorly graded sands or gravelly sands,little or no fines.
CL
Clayey sands, sand - clay mixtures.
Inorganic silts and very fine sands, rockflour, silty of clayey fine sands or clayeysilts and with slight plasticity.Inorganic lays of low to medium plasticity,gravelly clays, sandy clays, silty clays,lean clays.
Well graded gravels, gravel - sandmixtures, little or no fines.
Poorly graded gravels or grave - sandmixtures, little or no fines.
Auger Cuttings
1For sampling performed by Tri-County and Fugro Rigs
Bulk Sample
Correlation of Penetration Resistancewith Relative Density and Consistency (continued)
ML
CH
MAJOR DIVISIONS GROUPSYMBOLS
SW
SP
No Recovery
Dilatometer
(Appreciableamount of fines)
COARSEGRAINED
SOILS(More than 50% of
material isLARGER than No.
200 sieve size)
FINEGRAINED
SOILS
Well graded sands, gravelly sands, little orno fines.
Crandall Sampler
Water Table at time of drilling
OL
(Little or no fines)
SANDS WITHFINES
GC
(Liquid limit LESS than 50)
0 - 5
CRANDALL Sampler (300-lb hammer, 18-inch drop)2
Silty sands, sand - silt mixtures
GP
GM
CLEANGRAVELS
(Little or no fines)
GRAVELSWITH FINES
(Appreciableamount of fines)
CLEANSANDS Correlation of Penetration Resistance
with Relative Density and Consistency
6 - 1112 - 3233 - 53Over 53
0 - 12 - 56 - 9
10 - 1617 - 32Over 32
SAND & GRAVEL SILT & CLAYNo. of Blows Consistency
Very SoftSoft
Medium StiffStiff
CRANDALL Sampler (340-lb hammer, 18-inch drop)3
2For sampling performed by C & L Rig #1
Very StiffHard
0 - 42 - 45 - 89 - 1415 - 29Over 29
SAND & GRAVEL SILT & CLAYConsistencyVery Soft
SoftMedium Stiff
StiffVery Stiff
Hard
No. of BlowsRelative DensityVery Loose
LooseMedium Dense
DenseVery Dense
No. of Blows
Relative DensityVery Loose
LooseMedium Dense
DenseVery Dense
No. of Blows
5 - 1011 - 2930- 47
Over 47
0 - 1
6 - 1213 - 3637 - 60Over 60
0 - 23 - 56 - 1011 - 1819 - 36Over 36
SAND & GRAVEL SILT & CLAYNo. of Blows Consistency
Very SoftSoft
Medium StiffStiff
Very StiffHard
Medium DenseLoose
DenseVery Dense
0 - 5Relative Density
Very LooseNo. of Blows
SAND & GRAVEL SILT & CLAYNo. of Blows
(More than 50% ofmaterial is
SMALLER thanNo. 200 sieve size)
Split Spoon Sample
Undisturbed Sample
SILTS AND CLAYS(Liquid limit GREATER than 50)
Pressuremeter
MH
Organic silts and organic silty clays of lowplasticity.Inorganic silts, micaceous ordiatomaceous fine sandy or silty soils,elastic silts.
Inorganic clays of high plasticity, fat clays
SILTS AND CLAYS
Noise/Vibration
(More than 50% ofcoarse fraction isSMALLER thanthe No. 4 Sieve
Size)
Silty gravels, gravel - sand - silt mixtures.
SANDS
(More than 50% ofcoarse fraction is
LARGER than theNo. 4 sieve size)
GRAVELS
SM
SC
Water Table after drilling
Rock Core
ConsistencyRelative DensityNo. of Blows
8 - 16Tar sand
BOUNDARY CLASSIFICATIONS: Soils possessing characteristics of two groups are designated bycombinations of group symbols.
TYPICAL NAMES
CRANDALL Sampler (140-lb hammer, 30-inch drop)1
NOTES:
CRANDALL Sampler (380-lb hammer, 18-inch drop)4
3For sampling performed by C & L Rig #2 prior to 3/8/20114For sampling performed by C & L Rig #2 after 3/8/2011
Figure A-1.0
KEY TO SYMBOLS AND DESCRIPTIONSFOR GEOTECHNICAL EXPLORATION LOGS
Preliminary Geotechnical and Environmental Report
Appendix A – Geotechnical Investigation
W E S T S I D E S U B W A Y E X T E N S I O N P R O J E C T December 21, 2011
FIGURES A-1.1A THROUGH A-1.19C LOGS OF ROTARY-WASH BORINGS (ACE PHASE)
ELEV
ATI
ON
(ft)
210
205
200
195
190
185
180
175
14.7
18.1
22.6
21.4
20.2
25.5
28.2
90
34
SM
CL
ML
SM
CL
27
18
17
28
111
-
101
-
97
-
95
76
38
63
4-inch thick Asphalt Concrete over 10-inch thick Concrete andBase CourseFILL [Af]SILTY SAND - moist, yellowish brown, fine-grained, someclay pods
LAKEWOOD FORMATION [Qlw]LEAN CLAY - very stiff to hard, moist, light brown, trace finesand
(LL=39, PI=14)
Increased sand content
SANDY SILT - hard, moist, brownish gray, thin lenses of SiltySand
SILTY SAND - medium dense to very dense, moist, lightbrown, fine to medium-grained
Alternating with thin layers of cleaner sand
SAN PEDRO FORMATION [Qsp]LEAN CLAY - very stiff to hard, wet, light brown
Bluish gray
SAM
PLE
LOC
.
399+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED7/30/2009GROUND-WATER READINGSDrilling mud bailed on 7/30/2009. Ground-water level measured at 32 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
214.5 feet
G-1
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.1aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
170
165
160
155
150
145
140
135
27.4
22.1
26.6
-
17.3
21.4
19.3
10
ML
SM
CL
SM
SP-SM
30
15
30
68
-
105
-
-
-
-
108
78
81
80/11"
50/6"
Trace fine to medium sand(LL=48, PI=24)
SANDY SILT - hard, wet, greenish gray
SILTY SAND - very dense, wet, greenish gray, fine-grained
LEAN CLAY - very stiff, wet, greenish gray
(Sample not recovered)
SILTY SAND - very dense, wet, bluish gray, fine tocoarse-grained, trace gravel
POORLY GRADED SAND with SILT - very dense, wet,bluish gray, fine to medium-grained, some gravel(Sample not recovered)
Less gravel content
Thin layer of coarse gravel
SAM
PLE
LOC
.
399+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED7/30/2009GROUND-WATER READINGSDrilling mud bailed on 7/30/2009. Ground-water level measured at 32 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
214.5 feet
G-1(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.1bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
130
125
120
115
110
105
100
95
- -50/3"
END OF BORING AT 81½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 32 feet on 7/30/2009. Ground-water levelmeasured at 32 feet below ground surface about 10 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
399+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED7/30/2009GROUND-WATER READINGSDrilling mud bailed on 7/30/2009. Ground-water level measured at 32 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
214.5 feet
G-1(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.1cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
195
190
185
180
175
170
165
17.0
18.8
-
17.8
-
23.5
-
36
CL-ML
ML
CL
SC
CL
0
0
0
0
0
0
0
14
9
17
20
108
106
-
106
-
99
-
36
43
60
7-inch thick Concrete, some concrete fragmentsFILL [Af] - SILTY CLAY - moist, light to dark brown,abundant rootletsQUATERNARY OLDER ALLUVIUM [Qalo]SANDY SILT - very stiff, moist, light brown, slightly porous
SANDY LEAN CLAY - stiff to hard, moist, brown
CLAYEY SAND - medium dense, moist, light brown,fine-grained
SAN PEDRO FORMATION [Qsp]LEAN CLAY - very stiff to hard, moist, bluish gray
Thin layer of Clayey Sand
Wet
SAM
PLE
LOC
.
408+60, Rt 70 feetHOLE DIAMETER5 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 DRILLED06/03/2009GROUND-WATER READINGSDrilling mud bailed on 6/3/2009. Ground-water level measured at 32 feet belowthe ground surface 15 minutes after removal of drilling mud
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-2
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.2aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
32.2
-
-
-
19.1
-
26.1
-
10
SM
ML
SP-SM
0
0
0
0
0
0
0
0
24
23
67
44
88
-
-
-
103
-
93
-
28
73
50/3"
61
SILTY SAND - medium dense, wet, bluish gray, veryfine-grainedSANDY SILT - very stiff, wet, bluish gray
Some dark brown Lean Clay
Increased sand content
(Sample not recovered)POORLY GRADED SAND with SILT - very dense, wet,bluish gray, fine to medium-grained
Slightly darker gray, slight organic smell
FERNANDO FORMATION [Tf]SILTSTONE - weak, wet, greenish gray, massive
SAM
PLE
LOC
.
408+60, Rt 70 feetHOLE DIAMETER5 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 DRILLED06/03/2009GROUND-WATER READINGSDrilling mud bailed on 6/3/2009. Ground-water level measured at 32 feet belowthe ground surface 15 minutes after removal of drilling mud
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-2(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.2bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
115
110
105
100
95
90
85
28.6
32.5
31.4
34.5
31.2
0
0
0
0
0
62
45
55
56
43
92
87
89
86
86
Clayey, unoxidized
Thinly bedded
6- to 8-inch thick cemented layer
18-inch thick cemented layer
END OF BORING AT 101 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 34.2 feet on 6/3/2009. Ground-water levelmeasured at 32 feet below ground surface about 15 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
408+60, Rt 70 feetHOLE DIAMETER5 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 DRILLED06/03/2009GROUND-WATER READINGSDrilling mud bailed on 6/3/2009. Ground-water level measured at 32 feet belowthe ground surface 15 minutes after removal of drilling mud
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-2(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.2cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
195
190
185
180
175
170
165
160
17.7
-
16.8
-
21.2
-
21.7
62
52
CH
CL
SM
SP-SMML
0
0
0
0
0
0
0
14
17
24
36
106
-
109
-
102
-
103
8
11
21
11-inch thick Asphalt Concrete over 3-inch thick Base Courseand 3-inch thick ConcreteFILL [Af]FAT CLAY - moist, light gray to black, abundant rootlets,slight organic smell(LL=51, PI=34)Less organic matter
LAKEWOOD FORMATION [Qlw]SANDY LEAN CLAY - medium stiff, moist, grayish green
SILTY SAND - medium dense, moist, greenish gray, fine tomedium-grained, some coarse
POORLY GRADED SAND with SILT - wet, greenish gray,fine to medium-grainedSANDY SILT - stiff to very stiff, wet, light gray and brown
Greenish gray
SAM
PLE
LOC
.
481+95, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/19/2009GROUND-WATER READINGSDrilling mud bailed on 5/19/2009. Ground-water level measured at 16 feetbelow the ground surface 25 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195.3 feet
G-3
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.3aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ L
a B
rea
Stat
ion
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
120
-
26.5
-
23.0
-
21.7
-
20.1
CL
CH
SM
SP
0
0
0
0
0
0
0
0
29
72
94/9"
75/5"
-
97
-
99
-
99
-
106
32
35
55
75
SANDY LEAN CLAY - hard, wet, grayish green(LL=43, PI=20)
Alternating with siltier layers
FAT CLAY - very stiff, wet, grayish green(LL=53, PI=30)
SILTY SAND - dense, wet, greenish gray, fine-grained
SAN PEDRO FORMATION [Qsp]POORLY GRADED SAND - very dense, wet, greenish gray,fine to medium-grained
Slight hydrogen sulfide detected on monitor
Lenses of fine sand, trace silt
Lenses of fine sand, trace silt
SAM
PLE
LOC
.
481+95, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/19/2009GROUND-WATER READINGSDrilling mud bailed on 5/19/2009. Ground-water level measured at 16 feetbelow the ground surface 25 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195.3 feet
G-3(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.3bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ L
a B
rea
Stat
ion
ELEV
ATI
ON
(ft)
115
110
105
100
95
90
85
80
-
25.3
-
37.6
56.5
SM
GM
SP
0
0
0
0
0
75/5"
90/10"
90/9"
-
95
-
81
62
76
41
SILTY SAND - very dense, wet, light gray, fine tocoarse-grained
SILTY GRAVEL - up to 1/4-inch in size
POORLY GRADED SAND - very dense, wet, gray,fine-grained, some shell fragmentsFERNANDO FORMATION [Tf]SILTSTONE - weak to very weak, wet, light greenish gray,unoxidized, highly weathered, some very fine sand and claylenses
3- to 4-inch cemented layerThinly bedded
END OF BORING AT 101 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 26 feet on 5/19/2009. Ground-water levelmeasured at 16 feet below ground surface about 25 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
481+95, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/19/2009GROUND-WATER READINGSDrilling mud bailed on 5/19/2009. Ground-water level measured at 16 feetbelow the ground surface 25 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195.3 feet
G-3(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.3cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
190
185
180
175
170
165
160
20.2
16.2
21.0
30.8
28.1
33.6
33
CL-ML
SC
CL
10
10
22
106
-
105
-
93
-
23
34
39
5-inch thick Asphalt Concrete over 6-inch thick ConcreteFILL [Af]SILTY CLAY - moist, dark gray
LAKEWOOD FORMATION [Qlw]CLAYEY SAND - loose to medium dense, moist, lightbrownish gray
(LL=45, PI=24)
Olive
Increased sand and gravel content
SAN PEDRO FORMATION [Qsp]LEAN CLAY - very stiff to hard, moist, bluish gray
Slight hydrogren sulfide odor detected in sample
Wet
Slightly increased sand content, with small cemented siltpods(LL=49, PI=26)
No sample due to pressure meter test
SAM
PLE
LOC
.
486+78, Rt 12 feetHOLE DIAMETER5 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 DRILLED07/16/2009 to 07/20/2009GROUND-WATER READINGSGround-water level measured at 28 feet below the ground surface 2 days aftercompletion of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195 feet
G-4
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.4aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
150
145
140
135
130
125
120
25.7
25.4
21.9
19.4
-
21.3
-
41
10
SM
ML
SM
SP-SM
SW
10
21
22
23
99
-
107
-
-
106
-
67
50/5"
50/6"
SILTY SAND - wet, bluish gray, fine-grained
SANDY SILT - hard, wet, bluish gray
SILTY SAND - dense, wet, gray, fine-grained
(Sample not recovered)
Sample skipped to prepare for pressure meter test
POORLY GRADED SAND with SILT - medium dense, wet,gray, fine to medium-grained
WELL GRADED SAND with GRAVEL - very dense, wet,brown, fine to coarse-grained(Sample not recovered)
4-inch diameter cobble
SAM
PLE
LOC
.
486+78, Rt 12 feetHOLE DIAMETER5 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 DRILLED07/16/2009 to 07/20/2009GROUND-WATER READINGSGround-water level measured at 28 feet below the ground surface 2 days aftercompletion of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195 feet
G-4(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.4bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
110
105
100
95
90
85
80
29.2
-
SP2690
-50/5"
POORLY GRADED SAND - medium dense to very dense,wet, gray, fine-grained
4- to 6-inch diameter cobble
(Sample not recovered)
FERNANDO FORMATION [Tf]SILTSTONE
No sample due to pressure meter test
No sample due to pressure meter testEND OF BORING AT 95 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Pressure meter tests performed at 35, 50, 90, and 95 feet.Ground-water level measured at 28 feet below ground surface2 days after completion of drilling. Two separate 1-inchdiameter ground-water monitoring wells extending to 30 feetand 60 feet, respectively, installed in borehole uponcompletion of drilling (see well construction diagram for G-4).
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
486+78, Rt 12 feetHOLE DIAMETER5 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 DRILLED07/16/2009 to 07/20/2009GROUND-WATER READINGSGround-water level measured at 28 feet below the ground surface 2 days aftercompletion of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
195 feet
G-4(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.4cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
165
160
155
150
145
140
135
130
22.0
-
15.3
-
20.6
-
16.6
62
68
SM
ML
SC
SM
ML
CL-ML
CL
0
0
0
0
1.1
1.2
4.3
13
18
42
67
100
-
110
-
95
-
89
7
19
16
6-inch thick Asphalt Concrete over 6-inch thick ConcreteFILL [Af]SILTY SAND - moist, reddish brown, fine to medium-grained,some gravel
QUATERNARY OLDER ALLUVIUM [Qalo]SILT - very stiff, moist, reddish brown, some clay
CLAYEY SAND with SILT - moist, brownish orange, fine tocoarse-grainedSILTY SAND - moist, brownish orange, fine tomedium-grained
Thin layer of gravelSILT - medium stiff to very stiff, moist, reddish brown, sandylenses, some clay
Light gray, fine sandy lenses
Wet
LAKEWOOD FORMATION [Qlw]TAR IMPACTED SOILSSILTY CLAY - very stiff, wet, brown and dark gray(LL=49, PI=28)Some tar deposits
SANDY LEAN CLAY - very stiff to hard, wet, bluish gray,some tar(LL=49, PI=26)
Heavy tar
SAM
PLE
LOC
.
527+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/22/2009GROUND-WATER READINGSDrilling mud bailed on 5/22/2009. Ground-water level measured at 16 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
167.9 feet
G-5
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.5aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ Fai
rfax
Sta
tion
ELEV
ATI
ON
(ft)
125
120
115
110
105
100
95
90
-
6.3
-
-
-
5.0
-
-
SP50.6
55.0
35.6
42.0
144.0
74.3
85/11"
87/7"
75/5"
100/4"
-
108
-
-
-
110
-
-
77
92
70
92/10"
SAN PEDRO FORMATION [Qsp]POORLY GRADED SAND - very dense, black, fine-grained,heavy tar
(Sample not recovered)
Some silt lenses, grayish brown
Some fine gravels
(Sample not recovered)
SAM
PLE
LOC
.
527+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/22/2009GROUND-WATER READINGSDrilling mud bailed on 5/22/2009. Ground-water level measured at 16 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
167.9 feet
G-5(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.5bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ Fai
rfax
Sta
tion
ELEV
ATI
ON
(ft)
85
80
75
70
65
60
55
50
-
8.9
-
15.2
20.1
62.4
64
72.6
40.1
125
105
120
-
113
-
104
100
68
48
FERNANDO FORMATION [Tf]SILTSTONE - weak to very weak, very dark gray, heavy tar,weathered
(Sample not recovered)
Gray, contains less tar
END OF BORING AT 101 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 30 feet on 5/22/2009. Ground-water levelmeasured at 16 feet below ground surface about 15 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
527+12, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/22/2009GROUND-WATER READINGSDrilling mud bailed on 5/22/2009. Ground-water level measured at 16 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
167.9 feet
G-5(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.5cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
160
155
150
145
140
135
130
125
25.9
-
17.2
-
23.3
-
14.0
71
60
ML
CL-MLML
ML
ML
12
10
22
39
96
-
107
-
95
-
110
44
46
46
7-inch thick Asphalt Concrete and 7-inch thick Concrete over5-inch thick Base CourseFILL [Af]SILT - moist, brown, some clay
SILTY CLAY - moist, brownQUATERNARY OLDER ALLUVIUM [Qalo]SANDY SILT - stiff to hard, moist, light brown, some clay
Some sandier lenses
Thin layer of Silty Sand with some tar pods
Alternating thin layers of brownish gray Sandy Silt andSilty Sand, more tar pods
TAR IMPACTED SOILSSILT - very stiff to hard, moist, greenish gray, some tar pods,some clay
Thin sandier lens
SAN PEDRO FORMATION [Qsp]SILT - very stiff, moist, greenish gray, some clay
SAM
PLE
LOC
.
532+10, Lt 35 feetHOLE DIAMETER5 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 DRILLED08/17/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
164.2 feet
G-6
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.6aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ Fai
rfax
Sta
tion
ELEV
ATI
ON
(ft)
120
115
110
105
100
95
90
85
-
10.7
-
4.4
-
3.7
-
6.2
SM
SP
ML
SP
30
87
78
91
-
106
-
110
-
111
-
115
43
50/5"
50/5"
87
SILTY SAND - medium dense, moist, gray and black,fine-grained, heavy tar
POORLY GRADED SAND - very dense, moist, black, fine tomedium-grained, heavy tar
Some fine gravel
SILT - hard, moist, greenish gray, some fine sand, some clay(LL=44, PI=16)
POORLY GRADED SAND - very dense, moist, black, fine tomedium-grained, heavy tar
SAM
PLE
LOC
.
532+10, Lt 35 feetHOLE DIAMETER5 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 DRILLED08/17/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
164.2 feet
G-6(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.6bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ Fai
rfax
Sta
tion
ELEV
ATI
ON
(ft)
80
75
70
65
60
55
50
45
- -50/5"
END OF BORING AT 81½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Ground-water not encountered at time of drilling. Twoseparate 1-inch diameter ground-water monitoring wellsextending to 17.5 feet and 45.5 feet, respectively, installed inborehole upon completion of drilling (see well constructiondiagram for G-6).
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
532+10, Lt 35 feetHOLE DIAMETER5 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 DRILLED08/17/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
164.2 feet
G-6(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.6cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
120
16.8
-
32.7
-
25.8
-
-
51
59
SC
CL
ML
CH
ML
MH
1.1
1.3
2.2
2.6
4.1
10.6
28
10
22
19
112
-
87
-
94
-
-
16
20
27
6-inch thick Asphalt Concrete over 1-1/2-inch thick BaseCourse and 5-inch thick ConcreteFILL [Af]CLAYEY SAND - slightly moist, light olive brown to lightreddish brown
LAKEWOOD FORMATION [Qlw]SANDY LEAN CLAY - hard, slightly moist, olive brown
SANDY SILT - very stiff, slightly moist, olive brown with rustcoloring, faint laminations
FAT CLAY - stiff to very stiff, moist, olive(LL=59, PI=32)
SANDY SILT - stiff, moist, olive
Greenish blue, some gravel
SAN PEDRO FORMATION [Qsp]SANDY ELASTIC SILT - very stiff, moist, dark gray, slightgaseous odor(LL=55, PI=23)
(Sample not recovered)
SAM
PLE
LOC
.
535+47, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/27/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
159.5 feet
G-7
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.7aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
115
110
105
100
95
90
85
80
-
38.8
-
-
-
5.8
-
40.5
SP
CH
SP
11.6
11.9
13.3
42.2
48.8
49.3
13
22
38
21
-
81
-
-
-
117
-
79
25
80
86/11"
88/9"
Bluish green
TAR IMPACTED SOILSPOORLY GRADED SAND - dense to very dense, black,fine-grained, heavy tar
(Sample not recovered)
Trace medium sand
Trace subrounded pebbles
FAT CLAY - very stiff, moist, bluish gray
POORLY GRADED SAND - very dense, black, fine-grained,heavy tar
SAM
PLE
LOC
.
535+47, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/27/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
159.5 feet
G-7(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.7bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
75
70
65
60
55
50
45
40
-
-
-
-
-
68
63.3
17.7
50/3"
50/5"
-
-
-
-
-
80/9"
50/3"
50/4"
Trace subrounded gravel
(Sample not recovered)
(Sample not recovered)
Subrounded gravel up to 1/4 inch in size, faint laminations
END OF BORING AT 101 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Ground-water not encountered at time of drilling. Boringgrouted with a cement-bentonite slurry from the bottom upand patched.
"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
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
535+47, Lt 25 feetHOLE DIAMETER5 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 DRILLED05/27/2009GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
159.5 feet
G-7(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.7cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
75
70
65
60
55
50
45
ML
SP
36
38
24
53
90/9"
71
Please refer to boring log G-7 for soil data from 0 to 100 feet(located approximately 10 feet east of G-7A)
Note: Contact between base of Older Alluvium and top of SanPedro Formation estimated at 50 feet bgs based on adjacentboring G-7.
SAN PEDRO FORMATION (Qsp)SANDY SILT - very stiff to hard, moist, olive gray, PocketPen: +4.5 tsf
Some tar deposits
Increasing in sand content
Alternating with thin layers of fine Sand
Slightly increased tar content
POORLY GRADED SAND - very dense, moist, black, fine,some tar, strong hydrocarbon odor
SAM
PLE
LOC
.
535+70, Lt 5 feetHOLE DIAMETER5 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 DRILLED8/16/2010 - 8/17/2010GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
160 feet
G-7A(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: LMChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.8aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
35
30
25
20
15
10
5
SP
ML
150/2"
74
85
33
34
51
49
24
67
58
53
59
POORLY GRADED SAND - very dense, moist, fine tomedium grained, strong hydrocarbon odorSample not recovered from 121.5 to 122.5 feet
Some coarse gravel
Grades to very fine to fine Sand
FERNANDO FORMATION (Tf)SILT- hard, moist, olive, fine, strong hydrocarbon odor, PocketPen: 4.25 tsf
Moist, olive gray, fine
Core sample not recovered, Silt washed out of sampler
Occasional shell fragments
Interbedded with thin layers of fine Sand, strong hydrocarbonodor
SAM
PLE
LOC
.
535+70, Lt 5 feetHOLE DIAMETER5 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 DRILLED8/16/2010 - 8/17/2010GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
160 feet
G-7A(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: LMChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.8bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
-5
-10
-15
-20
-25
-30
-35
33
41
50
52
29
46
33
SILT - olive green, slightly weathered, trace clay content
CLAYEY SILT - medium dark gray, poorly cemented, stronghydro-carbon odor, Pocket Pen: +4.5 tsfSome tar seepage at bottom
Some small shell fragments
Sample not recovered from 165.5 to 166.5 feet
Less weathered, increased induration, same lithology as aboveMedium dark gray, poorly cemented, strong hydrocarbonodor, Pocket Pen: +4.5 tsfSample not recovered from 168.4 to 170 feet
Sample not recovered from 169.5 to 170 feetCLAYEY SILT - small broken shell fragments 1/16"-1/8",medium dark gray, poorly cemented, strong hydrocarbon odor,Pocket Pen: +4.5 tsf
Medium dark gray, poorly cemented, strong hydrocarbonodor, Pocket Pen: +4.5 tsf
Medium dark gray, poorly cemented, strong hydrocarbonodor, Pocket Pen: +4.5 tsf
Slightly increased tar content
END OF BORING AT 180 FEET
NOTES:Water level not measured at time of drilling. After completionof initial drilling, borehole reamed to a diameter of 6 inches toa depth of 150 feet below ground surface. Three seperate1-inch diameter monitoring wells extending to 87½ feet, 117½feet, and 140 feet, respectively, installed in borehole uponcompletion of reaming (see well construction diagram forG-7A).
*Number of blows required to drive the Crandall sampler 12inches using a 300 pound automatic downhole hammer falling18 inches.
Shelby Tubes were driven from:161.0 to 162.5 feet167.3 to 169.0 feet170.0 to 172.0 feet173.0 to 174.8 feet175.0 to 176.0 feet
Each Shelby Tube represents the distance in inches in drivepenetration
SAM
PLE
LOC
.
535+70, Lt 5 feetHOLE DIAMETER5 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 DRILLED8/16/2010 - 8/17/2010GROUND-WATER READINGSGround-water not encountered at time of drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
160 feet
G-7A(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
DEP
TH (f
t)
165
170
175
180
185
190
195
200
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: LMChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.8cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
135
130
125
120
115
110
105
25.2
21.0
21.5
26.3
27.4
31.9
37.4
73
CL
CL
ML
CL
CH
15
14
9
24
96
-
101
-
91
-
81
47
15
22
4-inch thick Asphalt Concrete over 6-inch thick ConcreteFILL [Af]LEAN CLAY - moist, brown and gray
QUATERNARY YOUNGER ALLUVIUM [Qal]LEAN CLAY - stiff to hard, moist, brown
QUATERNARY OLDER ALLUVIUM [Qalo]LEAN CLAY - stiff to hard, moist, light olive gray, siltier,(postulated contact)
SANDY SILT - stiff, wet, brown
LEAN CLAY - wet, brown and gray
(LL=48, PI=24)SAN PEDRO FORMATION [Qsp]FAT CLAY with SAND - very stiff to hard, wet, gray
(LL=65, PI=36)
SAM
PLE
LOC
.
580+25, Lt 62 feetHOLE DIAMETER5 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 DRILLED07/12/2009GROUND-WATER READINGSDrilling mud bailed on 7/12/2009. Ground-water level measured at 24 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
140 feet
G-8
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.9aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
95
90
85
80
75
70
65
34.5
28.7
28.1
17.4
15.0
16.6
34.7
30.0
CL
ML
34
25
56
25
-
94
-
113
-
111
-
89
24
65
50/6"
45
LEAN CLAY - very stiff to hard, wet, green and gray(LL=40, PI=18)
Increased gravel, less clay content
SANDY SILT - hard, wet, greenish gray, some clay
SAM
PLE
LOC
.
580+25, Lt 62 feetHOLE DIAMETER5 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 DRILLED07/12/2009GROUND-WATER READINGSDrilling mud bailed on 7/12/2009. Ground-water level measured at 24 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
140 feet
G-8(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.9bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
55
50
45
40
35
30
25
37.6 -38
END OF BORING AT 81½ FEET
NOTES:
Hand augered upper 5 feet to avoid utilities. Drilling mudbailed on 7/12/2009. Ground-water level measured at 24 feetbelow ground surface about 15 minutes after removal ofdrilling mud. Boring grouted with a cement-bentonite slurryfrom the bottom up and patched.
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
580+25, Lt 62 feetHOLE DIAMETER5 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 DRILLED07/12/2009GROUND-WATER READINGSDrilling mud bailed on 7/12/2009. Ground-water level measured at 24 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
140 feet
G-8(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.9cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
140
135
130
125
120
115
110
105
27.4
-
23.1
-
22.2
-
25.1
32
60
CH
SM
CL
SM
CL
ML
9
6
10
11
93
-
103
-
105
-
101
26
37
16
4-inch thick Asphalt Concrete over 8-inch thick Concrete andBase CourseQUATERNARY YOUNGER ALLUVIUM [Qal]FAT CLAY - stiff, moist, dark gray, slightly porous(LL=75, PI=45)
Light brownish gray
SILTY SAND - medium dense, moist, light brown, fine tocoarse-grained, some clay, some gravel
SANDY LEAN CLAY - medium stiff, moist, light brown withred mottling
Bluish gray(LL=40, PI=21)
QUATERNARY OLDER ALLUVIUM [Qalo]SILTY SAND - dense, wet, bluish gray, some gravel
LEAN CLAY - stiff, wet, bluish gray, alternating with sandierseams
Light brown
(LL=38, PI=18)
SANDY SILT - stiff to hard, wet, brown
Increased clay content
SAM
PLE
LOC
.
586+37, Lt 40 feetHOLE DIAMETER5 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 DRILLED06/28/2009GROUND-WATER READINGSDrilling mud bailed on 6/28/2009. Ground-water level measured at 21 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
144.7 feet
G-9
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.10aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
100
95
90
85
80
75
70
65
-
21.9
-
32.5
-
-
-
-
71
ML
CL
SC
CL
10
15
12
32
-
100
-
89
-
-
-
-
30
42
43
50/5"
SAN PEDRO FORMATION [Qsp]SILT - very stiff, wet, greenish gray, some clay
LEAN CLAY - stiff, wet, greenish gray(LL=39, PI=18)
CLAYEY SAND - very dense, wet, greenish gray, fine tocoarse-grained, some small gravel
SANDY LEAN CLAY - hard, wet, brownish gray, some slategravel
(Sample not recovered)
Alternating with sandier lenses
SAM
PLE
LOC
.
586+37, Lt 40 feetHOLE DIAMETER5 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 DRILLED06/28/2009GROUND-WATER READINGSDrilling mud bailed on 6/28/2009. Ground-water level measured at 21 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
144.7 feet
G-9(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.10bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
60
55
50
45
40
35
30
25
-
24.3
-
39
CL-ML
34
-
93
-
29
22
Thin layer of Silty Sand
SILTY CLAY - very stiff, wet, brown and gray
END OF BORING AT 91½ FEET
NOTES:
Bailed drilling mud to 27 feet on 6/28/2009. Ground-waterlevel measured at 21 feet below ground surface about 15minutes after removal of drilling mud. Seepage observed at 15feet. Boring grouted with a cement-bentonite slurry from thebottom up and patched.
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
586+37, Lt 40 feetHOLE DIAMETER5 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 DRILLED06/28/2009GROUND-WATER READINGSDrilling mud bailed on 6/28/2009. Ground-water level measured at 21 feetbelow the ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
144.7 feet
G-9(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.10cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
170
165
160
155
150
145
140
135
13.6
16.9
-
19.1
-
9.5
- 19
SM
CL
CL
SC
5
7
14
25
97
105
-
108
-
122
-
39
35
76
6-inch thick Asphalt Concrete over 7-inch thick Concrete
FILL [Af]SILTY SAND with GRAVEL - moist, brown, fine tocoarse-grained
QUATERNARY YOUNGER ALLUVIUM [Qal]SANDY LEAN CLAY - medium stiff to hard, moist, brown,trace slate gravel(LL=30, PI=13)
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - moist, brown, (postulated contact)(LL=38, PI=19)
(Sample not recovered)
CLAYEY SAND with GRAVEL - medium dense to verydense, moist, brown, fine to coarse-grained
SAM
PLE
LOC
.
608+80, Lt 25 feetHOLE DIAMETER5 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 DRILLED06/18/2009GROUND-WATER READINGSDrilling mud bailed on 6/18/2009. Ground-water level measured at 41 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
173.5 feet
G-10
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.11aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
130
125
120
115
110
105
100
95
10.6
-
18.0
-
24.3
-
16.1
-
42
50
86
SM
CL
38
19
22
41
112
-
108
-
101
-
110
-
50/4"
27
35
44
Wet
Sample not recovered6-inch diameter cobble
Less gravel (LL=28, PI=9)
SILTY SAND - medium dense, wet, brown, fine tocoarse-grained
Thin layer of Lean Clay
LEAN CLAY - very stiff to hard, wet, gray
Some slate gravel(LL=40, PI=21)
SAM
PLE
LOC
.
608+80, Lt 25 feetHOLE DIAMETER5 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 DRILLED06/18/2009GROUND-WATER READINGSDrilling mud bailed on 6/18/2009. Ground-water level measured at 41 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
173.5 feet
G-10(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.11bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
90
85
80
75
70
65
60
55
16.2 25113END OF BORING AT 81 FEET
NOTES:
Hand augered upper 6 feet to avoid damage to utilities. Baileddrilling mud to 42 feet on 6/18/2009. Ground-water levelmeasured at 41 feet below ground surface about 10 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
608+80, Lt 25 feetHOLE DIAMETER5 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 DRILLED06/18/2009GROUND-WATER READINGSDrilling mud bailed on 6/18/2009. Ground-water level measured at 41 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
173.5 feet
G-10(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.11cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
220
215
210
205
200
195
190
185
19.8
-
20.5
-
8.6
-
7.6
65
77
SM
ML
CL
SM
ML
SM
6
14
42
26
100
-
105
-
125
-
128
14
44
11
12-inch thick Asphalt Concrete
FILL [Af]SILTY SAND - moist, brown and gray, fine tomedium-grainedThin layer of Gravelly Sand, possibly side of utility trench
QUATERNARY YOUNGER ALLUVIUM [Qal]SILT with SAND - medium stiff to stiff, moist, light brown,some clay
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - stiff to hard, moist, light brown, someslate gravel
(LL=40, PI=21)
SILTY SAND with GRAVEL - dense, moist, brown, fine tocoarse-grained
Trace gravel
SILT with SAND - stiff, moist, brown, some clay
SILTY SAND with GRAVEL - medium dense to very dense,moist, brown, fine to coarse-grained
SAM
PLE
LOC
.
640+20, Lt 31 feetHOLE DIAMETER5 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 DRILLED06/15/2009GROUND-WATER READINGSSeepage observed at 30 feet on 6/15/2009.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
220.5 feet
G-11
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.12aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
180
175
170
165
160
155
150
145
-
17.4
-
26.9
-
26.7
-
19.5
24
CL-ML
15
16
14
25
-
101
-
99
-
97
-
109
64
51
61
36
Less gravel content
Fine
Some siltier lenses
6-inch diameter cobble
Alternating with lenses of Poorly Graded Sand,fine to medium-grained
SILTY CLAY - stiff to hard, moist, brown
SAM
PLE
LOC
.
640+20, Lt 31 feetHOLE DIAMETER5 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 DRILLED06/15/2009GROUND-WATER READINGSSeepage observed at 30 feet on 6/15/2009.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
220.5 feet
G-11(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.12bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
140
135
130
125
120
115
110
105
-
14.4
-
CL32
-
117
-
74
55
SANDY LEAN CLAY - hard, moist, brown and gray, somesmall gravel
END OF BORING AT 91½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Seepage observed at 30 feet on 6/15/2009. Drill mud leveldropped overnight to 29 feet.Two separate 1-inch diameter ground-water monitoring wellsextending to 32.5 feet and 60 feet, respectively, installed inborehole upon completion of drilling (see well constructiondiagram for G-11).
"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 readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
640+20, Lt 31 feetHOLE DIAMETER5 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 DRILLED06/15/2009GROUND-WATER READINGSSeepage observed at 30 feet on 6/15/2009.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
220.5 feet
G-11(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.12cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
225
220
215
210
205
200
195
190
10.2
-
16.9
-
15.8
-
15.0
68
46
SM
ML
CL
CL
SC
SM
5
4
14
10
104
-
109
-
113
-
114
15
42
26
9-inch thick Asphalt Concrete over 8-inch thick Concrete
FILL [Af] - SILTY SAND - moist, brown and gray, fine tomedium-grained, some clay, some 2-inch long shell fragmentsQUATERNARY YOUNGER ALLUVIUM [Qal]SILT - medium stiff, moist, light brown, occasional slategravel, some clay
SANDY LEAN CLAY - stiff to hard, moist, light brown
(LL=47, PI=23)
Slightly increased sand content, medium stiff
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - moist, light brown, (postulatedcontact)
Slightly increased sand content
CLAYEY SAND - medium dense, moist, reddish brown, fineto coarse-grained
Wet
Thin layer of Sandy Lean Clay
SILTY SAND with GRAVEL - very dense, wet, brown, fine tocoarse-grained
SAM
PLE
LOC
.
645+13, Lt 35 feetHOLE DIAMETER5 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 DRILLED06/17/2009GROUND-WATER READINGSDrilling mud bailed on 6/17/2009. Ground-water level measured at 28 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
227 feet
G-12
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.13aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
185
180
175
170
165
160
155
150
-
7.6
-
14.9
-
25.1
-
17.0
16
CL
38
25
18
30
-
114
-
114
-
96
-
112
50/5"
30
33
36
LEAN CLAY - very stiff to hard, wet, brown, some slategravel
(LL=35, PI=17)
Siltier
SAM
PLE
LOC
.
645+13, Lt 35 feetHOLE DIAMETER5 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 DRILLED06/17/2009GROUND-WATER READINGSDrilling mud bailed on 6/17/2009. Ground-water level measured at 28 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
227 feet
G-12(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.13bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ R
odeo
Sta
tion
ELEV
ATI
ON
(ft)
145
140
135
130
125
120
115
110
- -50/5" Thin layer of Clayey Sand, fine to coarse-grained
END OF BORING AT 81½ FEET
NOTES:
Hand augered upper 6 feet to avoid damage to utilities. Baileddrilling mud to 29 feet on 6/17/2009. Ground-water levelmeasured at 28 feet below ground surface about 10 minutesafter removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
"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
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
SAM
PLE
LOC
.
645+13, Lt 35 feetHOLE DIAMETER5 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 DRILLED06/17/2009GROUND-WATER READINGSDrilling mud bailed on 6/17/2009. Ground-water level measured at 28 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
227 feet
G-12(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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.13cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
280
275
270
265
260
255
250
245
-
-
13.7
-
-
-
27.4
51
47
17
SM
ML
CL
SC
SM
CH
0.3
0.2
0.5
0.3
0.2
0
9
5
4
27
-
-
114
-
-
-
94
13
45
63
FILL [Af]SILTY SAND - moist, brown
QUATERNARY YOUNGER ALLUVIUM [Qal]SANDY SILT - stiff, moist, very dark brown, shale fragments
SANDY LEAN CLAY - stiff, moist, brown, shale fragmentsup to 3/4-inch in size
QUATERNARY OLDER ALLUVIUM [Qalo]CLAYEY SAND with GRAVEL - loose to dense, moist,reddish brown, fine-grained, trace shale fragments
Increased sand content, very dark gray with rust mottling
(Sample not recovered), low blow count due toheavy rig chatter caused by gravel in cuttingsWet
Abundant shale fragments
SILTY SAND - moist, brown to reddish brown, trace shalefragments
FAT CLAY - hard, wet, gray with brown mottling, shalefragments, trace fine sand
SAM
PLE
LOC
.
710+88, feetHOLE DIAMETER5 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 DRILLED05/28/2009GROUND-WATER READINGSGround-water level measured at 27 feet below the ground surface on 6/1/2009after 4 day hiatus in drilling.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
281.3 feet
G-13
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\A
CE
PHA
SE B
OR
ING
S.G
PJ 1
1/29
/11
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: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.14aMTA Westside Subway Extension
Los Angeles, California