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777 South Figueroa Street Suite 1100 Los Angeles, California 90017
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Date Initials
Originator 8/9/11 MBH/PM
Checker 11/28/11 RR/RC/AE
Back checker 12/2/11 MBH/PM
Verified by 12/7/11 GA
December 7, 2011
WESTSIDE SUBWAY EXTENSION PROJECTContract No. PS-4350-2000
Preliminary Geotechnicaland Environmental Report(Volume 2)
Preliminary Geotechnical and Environmental Report
Table of Contents
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 Page i December 7, 2011
VOLUME 2
Summary
As part of PE phase, the following investigations were performed:
Geotechnical
Subsurface Gas
Hydrogeologic
Environmental Site Assessment
Oil Well Survey
Fault Investigation
Noise and Vibration Studies
Volume 1 of the report provides the summaries of the field investigation programs for geotechnical, subsurface gas, hydrogeologic studies and oil well surveys; summary of laboratory testing program, description of project geology, evaluation of geologic seismic hazards, engineering properties of principal geologic units, results of ground motion study, geotechnical input for tunnel design and recommendations for stations. Only a summary of findings of fault investigation is included in Volume 1. The results of the comprehensive fault investigation are submitted in a separate report and not in this geotechnical and environmental report. Volume 1 includes Sections 1 through 14 along with an executive summary of the findings of PE phase.
Volume 2 (this volume) of the report presents the results of the field investigation: boring logs, monitoring well diagrams, Cone Penetration Test data, Dilatometer Test data, photographs of continuous core samples from sonic core borings and results of noise/vibration testing. Reports of oil well surveys, results of pump tests and boring logs of observation wells, National Pollution Discharge Elimination System (NPDES) permit are also included. Volume 2 consists of Appendices A through E and a breakdown of the appendices is presented in table of contents.
Volume 3 of the report presents the results of the laboratory testing for geotechnical, subsurface gas, hydrogeologic and environmental site assessment studies. Volume 3 consists of Appendices F through I and a breakdown of the appendices is presented in table of contents.
Preliminary Geotechnical and Environmental Report
Table of Contents
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 Page ii December 7, 2011
Table of Contents
VOLUME 2
Appendix A (Geotechnical Investigation)
Figure A-1.0: Unified Soil Classification System
Figures A-1.1a through A-1.19c: Logs of Rotary-Wash Borings (ACE Phase)
Figures A-2.1a through A-2.80c: Logs of Rotary-Wash Borings (PE Phase)
Figures A-3.1a through A-3.17f: Logs of Sonic Core Borings (PE Phase)
Figures A-4.1 through A-4.101: CPT Logs (PE Phase)
Figures A-5.1 through A-5.3: DMT Plots (PE Phase)
Figure A-6: Crandall Sampler
Figures A-7.1 through A-7.6: Ground Water Monitoring Well Diagrams (ACE Phase)
Figures A-8.1 through A-8.11: Ground Water Monitoring Well Diagrams (PE Phase)
Figures A-9.1 through A-9.101: Sonic Core Photographic Logs (PE Phase)
Figures A-10.1 through 10.78: Noise/Vibration Testing (PE Phase)
Appendix B (Subsurface Gas Investigation)
Figures B-1.1a through B-1.20b: Logs of Hollow-Stem Auger Borings (ACE Phase)
Figures B-2.1a through B-2.24c: Logs of Hollow-Stem Auger Borings (PE Phase)
Figures B-3.0 through B-3.24: Gas Monitoring Well Diagrams (ACE Phase)
Figures B-4.1 through B-4.19: Gas Monitoring Well Diagrams (PE Phase)
Figures B-5.1 through B-5.8: Field Soil Gas and Hydrogen Sulfide Measurements
Appendix C (Hydrogeologic Investigation)
Figures C-1.1a through C-1.3d: Logs of Borings (PE Phase)
Figures C-2.1 through C-2.4: Ground-water Monitoring Well Diagrams
Figures C-3.1 through C-3.84: Notice of Intent (NOI)
Figures C-4.1 through C-4.2: National Pollution Discharge Elimination System (NPDES) Permit
Figures C-5.1 through C-5.18: California Regional Water Quality Control Board Permit
Appendix D (Environmental Site Assessment)
Figures D-1.1a through D-1.31b: Logs of Borings (PE Phase)
Appendix E (Oil Well Survey)
Figures E-1.1 through E-1.50: Oil Well Survey Reports
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 7, 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 7, 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 7, 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
ELEV
ATI
ON
(ft)
240
235
230
225
220
215
210
205
-
-
-
-
-
-
-
-
70
40
CL
SC
CH
SM
0.2
0.3
0.1
26
27
70
30
-
-
-
-
-
-
-
-
31
42
71
90
(LL=54, PI=28)
(Sample not recovered)
SANDY LEAN CLAY - hard, wet, gray with brown mottling,trace subrounded and subangular gravel(LL=42, PI=22)
(Sample not recovered)
CLAYEY SAND - very dense, wet, brown, fine-grained, tracemedium, trace silt, contains carbonate-lined root cracks andcarbonate nodules
(Sample not recovered)
FAT CLAY - wet, brown
SILTY SAND - very dense, wet, reddish brown, fine tomedium-grained, trace clay(NP, NP)
(Sample not recovered)
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(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-1.14bMTA Westside Subway Extension
Los Angeles, California
Sant
a M
onic
a / C
entu
ry C
ity S
tatio
n
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
165
-
19.4
-
10.0
15.9
CL
SM
SP
67
100/6"
100/9"
-
108
-
118
113
54
92/9"
LEAN CLAY - hard, wet, brown with gray mottling
Increased sand contentSILTY SAND - very dense, wet, brown with gray mottling,fine to medium-grained, some slate gravel
POORLY GRADED SAND with GRAVEL - very dense, wet,brown with gray mottling, fine to medium-grained
Gravel and cobbles up to at least 3 inches in size
END OF BORING AT 101 FEET
NOTES:
Ground-water level measured at 27 feet below ground surfaceon 6/1/2009 after 4 day hiatus in drilling. Boring grouted witha cement-bentonite slurry from the bottom up.
"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 downhole hammer falling 18inches
**Photo Ionization Detector used for OVA readings
Elevation determined from topographic map provided byParsons-Brinckerhoff, dated August 12, 2009.
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(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-1.14cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
280
275
270
265
260
255
250
245
14.4
22.0
23.4
17.3
-
17.3
-
39
32
SM
CL
SM
8
7
3
8
112
-
96
-
-
-
-
12
22
5/6"
FILL [Af]SANDY LEAN CLAY - moist, brown and gray
Becomes dark gray
SILTY SAND with GRAVEL - loose, moist, brown, fine tomedium-grained, some coarse
QUATERNARY YOUNGER ALLUVIUM [Qal]SANDY LEAN CLAY - stiff, moist, brown, some slate gravel
QUATERNARY OLDER ALLUVIUM [Qalo]SILTY SAND - loose to medium dense, moist, brown, fine tomedium-grained, some gravel
(Sample not recovered)
(Sample not recovered)
SAM
PLE
LOC
.
710+94, 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 DRILLED07/14/2009 to 07/15/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
281 feet
G-14
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-1.15aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
240
235
230
225
220
215
210
205
-
-
45.8
18.0
24.8
14.8
21.2 51
CH
SM
SP
SW
50/6"
18
35
-
-
-
112
-
112
-
50/5"
38
80
50/6"
Grades to Gravelly Sand
Approximate 2-inch thick Clay layer at 43 feet
Sample not recovered due to 3-inch cobble in bit
FAT CLAY - very stiff to hard, moist, brown, some slategravel, trace fine sand(LL=65, PI=33)
No sample due to pressure meter test
SILTY SAND with GRAVEL - dense, moist, brown, fine tocoarse-grained
Thin layer of Lean Clay
POORLY GRADED SAND with GRAVEL - moist, lightbrown, fine to coarse-grained
WELL GRADED SAND with GRAVEL - very dense, moist,light brown, fine to coarse-grainedThin layer of Sandy Lean Clay
SAM
PLE
LOC
.
710+94, 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 DRILLED07/14/2009 to 07/15/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
281 feet
G-14(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-1.15bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
165
-
-
75-
-50/6"
(Sample not recovered)
6- to 8-inch diameter cobble
Sample not recovered due to large gravel in bitEND OF BORING AT 85½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Pressure meter test performed at 65 feet. Two separate 1-inchdiameter ground-water monitoring wells extending to 20 feetand 49 feet, respectively, installed in borehole uponcompletion of drilling (see well construction diagram forG-14).
*Number of blows required to drive the Crandall Sampler12 inches using a 340 pound downhole hammer falling 18inches
SAM
PLE
LOC
.
710+94, 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 DRILLED07/14/2009 to 07/15/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
281 feet
G-14(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-1.15cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
245
240
235
230
225
220
215
210
14.8
19.9
28.7
83
75
CL-ML
CL-ML
CL
SM
ML
CL-ML
SM
0.8
1.1
0.5
1.1
0.6
2.0
11
5
18
114
108
95
18
44
30
4-inch thick Asphalt ConcreteFILL [Af] - SILTY CLAY - olive gray to blueish gray, somesand
QUATERNARY OLDER ALLUVIUM [Qalo]SILTY CLAY - moist, dark brown, some sand
LEAN CLAY - stiff to very stiff, moist, olive brown, traceshale fragments
(LL=30, PI=15)
SILTY SAND - loose, wet, olive brown, fine, trace clay
SILT with SAND - hard, wet, reddish brown with graymottling
SILTY CLAY with SAND - very stiff, wet, reddish brown,contains black organic root fragments, trace sand
SILTY SAND - very dense, wet, orange brown, fine tomedium
SAM
PLE
LOC
.
735+35, Lt 175 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 DRILLED06/05/2009GROUND-WATER READINGSDrilling mud bailed on 6/5/2009. Ground-water level measured at 21 feet belowthe ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
246.3 feet
G-16-alt
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: DW/ARPrepared/Date: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.16aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
205
200
195
190
185
180
175
170
11.6
26.7
23.6
15
90
85
CL
ML
CL
ML
CL
0.4
0.4
51
61
49
52
36
115
98
100
64
36
85
Thin layer of Poorly Graded SandLEAN CLAY - hard, wet, olive
SILT with SAND - hard, wet, orange brown with graymottling, shale fragments, organic root fragments, some clay
LEAN CLAY - hard, wet, gray, trace fine sand and silt
(LL=43, PI=24)
SANDY SILT - wet, light brown
SANDY LEAN CLAY - hard, wet, brown, some fine sandylenses
Sample not recovered
Some slate gravel
Sample not recovered
SAM
PLE
LOC
.
735+35, Lt 175 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 DRILLED06/05/2009GROUND-WATER READINGSDrilling mud bailed on 6/5/2009. Ground-water level measured at 21 feet belowthe ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
246.3 feet
G-16-alt(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: DW/ARPrepared/Date: NHChecked/Date: DLP
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-1.16bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
165
160
155
150
145
140
135
130
13.4 40122
63
END OF BORING AT 86 FEET
NOTES:
Bailed drilling mud to 25 feet on 6/5/2009. Ground-waterlevel measured at 21 feet below ground surface about 15minutes after removal of drilling mud. Boring grouted with acement-bentonite slurry from the bottom up and patched.
*Number of blows required to drive Crandall Sampler 12inches using 300 pound downhole hammer falling 18 inches.
SAM
PLE
LOC
.
735+35, Lt 175 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 DRILLED06/05/2009GROUND-WATER READINGSDrilling mud bailed on 6/5/2009. Ground-water level measured at 21 feet belowthe ground surface 15 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
246.3 feet
G-16-alt(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: DW/ARPrepared/Date: NHChecked/Date: DLP
Project No.: 4953-10-1561 Figure: A-1.16cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
310
305
300
295
290
285
280
275
14.1
12.2
20.4
25.1
19
77
CL
CL
GM
CL
SM
ML
SM
SW
11
28
19
25
107
119
107
95
31
27
50/6"
4½-inch thick Asphalt Concrete and 6-inch thick Concreteover 1½-inch thick Base Course and concrete fragmentsFILL [Af]LEAN CLAY - moist, light to dark brown
QUATERNARY YOUNGER ALLUVIUM [Qal]LEAN CLAY with SAND - stiff to hard, moist, brown, tracegravel(LL=35, PI=15)Sandier
Some slate fragments
SILTY GRAVEL - medium dense, moist, brown, fine to coarse
QUATERNARY OLDER ALLUVIUM [Qalo]LEAN CLAY - very stiff, moist, brown, some slate fragments
Increased clay content
SILTY SAND - moist, brown, fine to medium-grained
SANDY SILT - very stiff, moist, brown, trace gravel
SILTY SAND with GRAVEL - very dense, moist, brown
Thin layer of Silt with Sand
WELL GRADED SAND with GRAVEL - medium dense,moist, light brown, fine to coarse-grained
SAM
PLE
LOC
.
804+25, Rt 300 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 DRILLED8/21/2009 to 8/24/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310.2 feet
G-20
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-1.17aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ U
CL
A S
tatio
n
ELEV
ATI
ON
(ft)
270
265
260
255
250
245
240
235
9.8
17.9
29.6
25.9
SM
ML
SW
ML
SM
CL
49
29
30
33
109
108
92
96
74
74
90
47
SILTY SAND - very dense, moist, brownish gray, fine-grained
SANDY SILT - moist, brown, some clay
WELL GRADED SAND with GRAVEL - dense, moist, brownand gray, fine to coarse-grained
SILT - very stiff to hard, moist, light brown, alternating withsandier and clayier layers
(NP, NP)
SILTY SAND - very dense, moist, light brown, fine-grained
LAKEWOOD FORMATION [Qlw]LEAN CLAY - very stiff to hard, moist, light brown
Increased sand content
SAM
PLE
LOC
.
804+25, Rt 300 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 DRILLED8/21/2009 to 8/24/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310.2 feet
G-20(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-1.17bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ U
CL
A S
tatio
n
ELEV
ATI
ON
(ft)
230
225
220
215
210
205
200
195
20.3
15.5
SM/SP
CL
SC
SM
34
35
108
107
73
49
50/5"
Trace gravel(LL=42, PI=19)
SILTY SAND and POORLY GRADED SAND - dense, moist,brownish gray, fine to medium-grained, alternating layers
LEAN CLAY - hard, moist, brownish gray
CLAYEY SAND - dense, moist, brownish gray, fine tocoarse-grained
SILTY SAND - very dense, moist, fine-grained
END OF BORING AT 101½ FEET
NOTES:
Hand augered top 6½ feet to avoid damage to utilities. Cavingobserved at 30 feet on August 24, 2009 after 2 day hiatus indrilling.Two separate 1-inch diameter ground-water monitoring wellsextending to 35 feet and 88 feet, respectively, installed inborehole upon completion of drilling (see well constructiondiagram for G-20).
"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
.
804+25, Rt 300 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 DRILLED8/21/2009 to 8/24/2009GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310.2 feet
G-20(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-1.17cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
305
300
295
290
285
280
275
19.7
-
-
32.1
-
-
-
-
51
45
19
SM
SW
SM
SW
SW
20
6
50/5"
23
103
-
-
89
-
-
-
-
13
48
36
30
5-inch thick Asphalt Concrete over 4-inch thick Base CourseQUATERNARY YOUNGER ALLUVIUM [Qal]SILTY SAND - medium dense, moist, dark brown, fine tocoarse-grained, slightly porous
Some slate gravel
WELL GRADED SAND with GRAVEL - moist, brown, fineto coarse-grained, some silt(Sample not recovered), low blow count due to slough
SILTY SAND with GRAVEL - hard, moist, brownish gray,fine to coarse-grained
Grades to fine to medium, less gravel, brown
Coarser
WELL GRADED SAND with GRAVEL - medium dense todense, moist, brownish gray, fine to coarse-grained, some silt
Increasing gravel, trace silt
QUATERNARY OLDER ALLUVIUM [Qalo]WELL GRADED SAND with GRAVEL - dense, moist,brownish gray
Alternating with less gravelly layers
(Sample not recovered), low blow count due to slough
SAM
PLE
LOC
.
815+00, Rt 187 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 DRILLED8/19/2009GROUND-WATER READINGSDrilling mud bailed on 8/19/2009. Ground-water level measured at 52 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310 feet
G-23
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-1.18aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
265
260
255
250
245
240
235
-
26.0
-
24.8
-
-
-
19.1
56
51
21
SM
SW
CL
SM
CL
SW
CL-ML
4
8
53
47
-
95
-
101
-
-
-
110
23
10
76
72
SILTY SAND - medium dense, moist, light brown, fine tomedium-grainedWELL GRADED SAND with GRAVEL - moist, brownishgray, fine to coarse-grained
SANDY LEAN CLAY - soft to stiff, moist, light brown
Brown and gray(LL=33, PI=12)
Wet
SILTY SAND with GRAVEL - loose, wet, brownish gray,fine-grained
Becomes very dense, gray, grades fine to coarse
Less coarse sand
LEAN CLAY - wet, light brown
WELL GRADED SAND with GRAVEL - dense, wet, fine tocoarse-grained
SILTY CLAY - hard, wet, light brown
(LL=27, PI=7)
Increasing clay
SAM
PLE
LOC
.
815+00, Rt 187 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 DRILLED8/19/2009GROUND-WATER READINGSDrilling mud bailed on 8/19/2009. Ground-water level measured at 52 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310 feet
G-23(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-1.18bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
225
220
215
210
205
200
195
-
-
-
24.1
-
SM
CL
SM
CL
34
30
-
-
-
95
-
66
63
46
Brown and gray
(Sample not recovered)
SILTY SAND - wet, brown, fine-grained
LEAN CLAY - hard, wet, brown and gray
SILTY SAND - medium dense, wet, brown, fine-grained
LEAN CLAY - hard, wet, brownish gray
END OF BORING AT 101½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 52.6 feet on 8/19/2009. Ground-water levelmeasured at 52 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
.
815+00, Rt 187 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 DRILLED8/19/2009GROUND-WATER READINGSDrilling mud bailed on 8/19/2009. Ground-water level measured at 52 feetbelow the ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
310 feet
G-23(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-1.18cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
320
315
310
305
300
295
290
285
12.9
-
17.2
-
7.3
-
-
50
SM
SM
ML
CL
SW
CL
CL-ML
8
7
64
42
94
-
103
-
126
-
-
45
57
24
3-inch thick Asphalt Concrete over 3-inch thick Base CourseFILL [Af] SILTY SAND - moist, brown, fine-grained, some brick andconcrete fragmentsQUATERNARY OLDER ALLUVIUM [Qalo]SILTY SAND - moist, grayish brown, fine to medium-grained,some gravelSANDY SILT - medium stiff, moist, brown, trace slate gravel
SANDY LEAN CLAY - medium stiff to hard, moist, brown,trace gravel
(LL=36, PI=19)
WELL GRADED SAND with GRAVEL - very dense, moist,light brown and gray, fine to coarse-grained, trace silt
LEAN CLAY - very stiff, moist, reddish brown, trace fine sand
(LL=37, PI=16)
(Sample not recovered)Increasing sand and gravel content
SILTY CLAY - moist, light brown
SAM
PLE
LOC
.
834+75, Lt 37 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 DRILLED9/3/2009GROUND-WATER READINGSDrilling mud bailed on 9/3/2009. Ground-water level measured at 69 feet belowthe ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
320.3 feet
G-24
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-1.19aMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ VA
Hos
pita
l Sta
tion
ELEV
ATI
ON
(ft)
280
275
270
265
260
255
250
245
-
-
-
24.5
-
13.8
-
18.8
51
42
23
ML
SW
CL
SM
CL
SM
CL
SM
75
38
39
22
-
-
-
92
-
120
-
101
40
50/5"
69
50/6"
SANDY SILT - hard, moist, brown, some gravel, some clayierlenses
WELL GRADED SAND with GRAVEL - very dense, moist,brown and gray, trace silt
Some slate cobbles estimated at 3 to 8 inches in length
SANDY LEAN CLAY - moist, brown, some gravel
SILTY SAND with GRAVEL - dense, moist, brown, fine tocoarse-grained
LEAN CLAY - moist, brown, trace gravel
SILTY SAND - dense to very dense, moist, brown, fine tocoarse-grained
LEAN CLAY - wet, brown, some gravel
SILTY SAND - medium dense to very dense, wet, brown, fineto coarse-grained, some silt
Some lenses of Poorly Graded Sand
SAM
PLE
LOC
.
834+75, Lt 37 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 DRILLED9/3/2009GROUND-WATER READINGSDrilling mud bailed on 9/3/2009. Ground-water level measured at 69 feet belowthe ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
320.3 feet
G-24(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-1.19bMTA Westside Subway Extension
Los Angeles, California
Wils
hire
/ VA
Hos
pita
l Sta
tion
ELEV
ATI
ON
(ft)
240
235
230
225
220
215
210
205
- -84/9"Thin layer of fine Silty Sand
END OF BORING AT 81½ FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities. Baileddrilling mud to 69 feet on 9/3/2009. Ground-water levelmeasured at 69 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
.
834+75, Lt 37 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 DRILLED9/3/2009GROUND-WATER READINGSDrilling mud bailed on 9/3/2009. Ground-water level measured at 69 feet belowthe ground surface 10 minutes after removal of drilling mud.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
320.3 feet
G-24(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-1.19cMTA Westside Subway Extension
Los Angeles, California
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 7, 2011
FIGURES A-2.1A THROUGH A-2.80C LOGS OF ROTARY-WASH BORINGS (PE PHASE)
ELEV
ATI
ON
(ft)
195
190
185
180
175
170
165
16.4
24.6
20.8
23.3
20.6
30.9
22.6
41
65
94
87
SP-SM
SM
CL
SC
ML
CL
4.2
3.2
1.9
4.1
2.2
3.1
2.9
17
15
25
35
107
-
103
-
106
-
103
11
17
23
12-inch thick Asphalt Concrete over 18-inch thick BaseCourse
FILL [Af]POORLY GRADED SAND with SILT - moist, olive yellow,fine to medium-grained, some coarse, trace gravel (up to 3/4inch in size)
Becomes siltier
Trace gravel (up to ½ inch in size)
Becomes medium to coarse-grained, some fineLAKEWOOD FORMATION [Qlw]SILTY SAND - medium dense, moist, yellowish brown, fine tomedium-grained, some coarse
More coarse grained
Becomes siltier, interbedded with thin grayish clay layers
SANDY LEAN CLAY - moist, olive, some fine sand
CLAYEY SAND - loose, moist, fine to medium-grained, somecoarse, small clay nodules, gravel (up to 3 inches in size)
SANDY SILT - very stiff, moist, dark olive, fine sand, somemedium to coarse, some clay
Less sandSAN PEDRO FORMATION [Qsp]LEAN CLAY - very stiff, moist, dark olive to olive gray, traceiron oxide stains
Becomes greenish gray, siltier
Some fine sand
SAM
PLE
LOC
.
Sta 374+10, 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
Fugro / CME 75DRILLING METHODRotary WashDATES DRILLED5/12/2011 and 5/13/2011GROUND-WATER READINGSDrilling mud bailed on 5/12/2011. Ground-water level measured at 19 feet belowthe ground surface on 5/13/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-101
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
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
100-
119)
.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
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OC
ATI
ON
SH
OW
N O
N L
OG
S A
RE
APP
RO
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.SU
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ER L
OC
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AT
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IMES
MA
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R.
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BET
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TRA
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RO
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. TR
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S B
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RA
DU
AL.
Field Tech: LHPrepared/Date: JF 8/9/2011Checked/Date: AB/LT 9/23/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.1aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
27.3
19.9
13.7
16.8
21.8
8.9
25.8
25.3
45
6
8
7
CH
SC
SP-SM
SW-SM
SM
3.2
2.0
1.7
3.5
1.5
2.1
1.3
0.0
26
67
62
50
-
110
-
105
-
131
-
93
16
20
47/10"
50/8"
FAT CLAY - very stiff, moist, greenish gray, some fine sand,some silt
Thin layer of poorly graded sand with clayCLAYEY SAND - medium dense, moist, greenish gray,fine-grained
POORLY GRADED SAND with SILT - medium dense, moist,greenish gray and blueish gray, fine to medium-grained, somecoarse
Trace gravel (up to 1 inch in size)
Becomes dense, wet, greenish gray
Becomes very dense, olive green, more fine sand
WELL GRADED SAND with SILT and GRAVEL - dense,wet, greenish-gray to gray, fine to coarse-grained, some gravel(up to 3/4 inch in size)
SILTY SAND - very dense, wet, gray, fine to coarse-grained,trace medium, trace gravel (up to ½ inch in size)
FERNANDO FORMATION [Tf]SANDY SILTSTONE - hard, wet, olive gray, claystoneinterbedded, thin layers of grayish fine sand, weakly
SAM
PLE
LOC
.
Sta 374+10, 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
Fugro / CME 75DRILLING METHODRotary WashDATES DRILLED5/12/2011 and 5/13/2011GROUND-WATER READINGSDrilling mud bailed on 5/12/2011. Ground-water level measured at 19 feet belowthe ground surface on 5/13/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-101(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
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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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\6.2
.3.1
GEO
TEC
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
100-
119)
.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
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OC
ATI
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SH
OW
N O
N L
OG
S A
RE
APP
RO
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.SU
BSU
RFA
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CO
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ITIO
NS
AT
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OC
ATI
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S A
ND
AT
OTH
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IMES
MA
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IFFE
R.
INTE
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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: LHPrepared/Date: JF 8/9/2011Checked/Date: AB/LT 9/23/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.1bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
115
110
105
100
95
90
85
39.00.0 -46
cemented, olive gray to dark olive brown, some light graysandstone
Becomes dark gray, no cementation to weakly cemented
END OF BORING AT 85 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 Sampler 12inches using a 140 pound automatic hammer falling 30 inches
**Photo Ionization Detector used for OVA readings
SAM
PLE
LOC
.
Sta 374+10, 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
Fugro / CME 75DRILLING METHODRotary WashDATES DRILLED5/12/2011 and 5/13/2011GROUND-WATER READINGSDrilling mud bailed on 5/12/2011. Ground-water level measured at 19 feet belowthe ground surface on 5/13/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-101(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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T LO
G\N
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
100-
119)
.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: LHPrepared/Date: JF 8/9/2011Checked/Date: AB/LT 9/23/2011
Project No.: 4953-10-1561 Figure: A-2.1cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
195
190
185
180
175
170
165
15.4
19.7
23.0
22.9
33.2
27.5
77
77
67
GP
SM
ML
SC
MH
CL
CH
CL
0.0
0.0
0.0
0.0
0.0
15
6
15
117
-
100
-
87
-
26
32
24
7-inch thick Asphalt Concrete over 2 inch-thick PortlandCement ConcreteFILL [Af] - POORLY GRADED GRAVEL with SANDLAKEWOOD FORMATION [Qlw]SILTY SAND with GRAVEL - loose, light brown, fine tocoarse-grained, fine gravel
More fine sand
SANDY SILT - stiff, moist, light brown, fine to medium sand
CLAYEY SAND - medium dense, moist, blueish-gray, fine tomedium-grianed (mostly medium-grained)
ELASTIC SILT with SAND - medium stiff, moist, light brown,fine sand, trace medium
LEAN CLAY with SAND - hard, moist, light brown, finesand, trace medium
More silt
SAN PEDRO FORMATION [Qsp] FAT CLAY with SAND - stiff, moist, greenish gray, fine sand,trace medium
SANDY LEAN CLAY - very stiff, moist, greenish gray, finesand
SAM
PLE
LOC
.
Sta 377+05, 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 DRILLED5/19/2011 and 5/20/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 16 feet below the groundsurface.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-102
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_(
100-
119)
.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
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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: HTYPrepared/Date: JF 8/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.2aMTA Westside Subway Extension
Los Angeles, California
PMT
ELEV
ATI
ON
(ft)
155
150
145
140
135
130
125
26.6
17.6
18.5
25.6
25.8
18.2
5.9
34.2
13
49
30
10
96
SC
SM
SP-SM
GW
SP
0.0
0.0
0.0
0.0
0.0
0.0
0.0
7
10
20
19
89
-
106
-
103
-
-
87
36
35
73
100
CLAYEY SAND - dense, wet, greenish gray, fine tocoarse-grained, trace fine gravel
SILTY SAND - dense, moist, greenish gray, fine tomedium-grained, trace coarse
Becomes wet, greenish gray, some clay
POORLY GRADED SAND with SILT- very dense, wet, gray,fine to medium-grained
WELL GRADED GRAVEL with SAND- very dense, wet,gray, fine to coarse sand
POORLY GRADED SAND - dense, wet, light gray,fine-grainedFERNANDO FORMATION [Tf]SILTSTONE - very stiff, moist, olive brown, trace fine sand
SAM
PLE
LOC
.
Sta 377+05, 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 DRILLED5/19/2011 and 5/20/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 16 feet below the groundsurface.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-102(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_(
100-
119)
.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: HTYPrepared/Date: JF 8/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.2bMTA Westside Subway Extension
Los Angeles, California
PMT
Tun
nel
ELEV
ATI
ON
(ft)
115
110
105
100
95
90
85
39.7
33.70.0 16
-
82
63Become hard, dark olive brown, less sand
END OF BORING AT 86 FEET
NOTES:
Hand augered the upper 8 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 380 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
Downhole Test: PMT = Pressuremeter
SAM
PLE
LOC
.
Sta 377+05, 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 DRILLED5/19/2011 and 5/20/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 16 feet below the groundsurface.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
200 feet
G-102(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_(
100-
119)
.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: HTYPrepared/Date: JF 8/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561 Figure: A-2.2cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
190
185
180
175
170
165
160
155
10.4
25.3
17.8
33.8
38.4
18.9
28.6
31.1
33
35
ML
SM
SP
ML
CL
CL
CL
SM
ML
SM
CL
1.3
5.9
1.7
6.1
3.5
5.4
3.2
5.6
27
33
17
18
111
-
110
-
83
-
93
-
11
15
33
20
8-inch thick Asphalt Concrete over 4-inch thick Base CourseFILL [Af]SANDY SILT - moist, brown, fine to medium sand
LAKEWOOD FORMATION [Qlw]SILTY SAND - moist, light brown, fine to medium-grained
POORLY GRADED SAND - medium dense, moist, lightbrown, fine to coarse-grained, trace gravel (up to 1/4 inch insize)
SILT - moist, light brown, trace fine sand, some clay
SAN PEDRO FORMATION [Qsp]LEAN CLAY - stiff, moist, brownish gray, trace fine sand
Sand content increases with depth
SANDY LEAN CLAY - very stiff, moist, light greenish gray,fine sand
LEAN CLAY - stiff, moist, light gray
SILTY SAND - medium dense, moist, brown, fine tomedium-grainedSILT - stiff, moist, greenish gray, some clay, trace sand
SILTY SAND - dense, moist, greenish gray, fine tomedium-grained, trace gravel (up to 3/8 inch in size), withalternating layers of Silt
Becomes medium dense, gray
LEAN CLAY - very stiff, moist, greenish gray, trace sand
SAM
PLE
LOC
.
Sta 388+80, Lt 10 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 DRILLED3/28/2011 and 3/29/2011GROUND-WATER READINGSDrilling mud bailed on 3/28/2011. Ground-water level measured at 14 feet belowthe ground surface on 3/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
193 feet
G-103
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_(
100-
119)
.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 5/19/2011Checked/Date: LT/PE 9/22/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.3aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
150
145
140
135
130
125
120
115
24.1
23.7
14.5
19.7
24.8
24.5
26.1
19.6
32.0
33.1
30.4
39.8
30.0
35.4
54
28
9
13
CL
SM
SC
SP-SM
SP
SM
SP
1.2
7.0
4.1
6.9
4.7
5.4
3.4
4.1
3.4
3.4
5.6
3.7
3.6
3.8
12
33
49
51
53
39
32
102
-
116
-
99
-
92
-
89
-
87
-
90
-
41
28
56
66
52
56
57
SANDY LEAN CLAY - stiff, moist, greenish gray, tracegravel (up to 3/8 inch in size)
SILTY SAND - dense, moist, greenish gray, fine tocoarse-grained
Becomes medium dense
CLAYEY SAND - medium dense, moist, greenish gray, fine tomedium-grained
POORLY GRADED SAND with SILT - dense, wet, light gray,fine-grained
POORLY GRADED SAND - very dense, wet, gray,fine-grained
Becomes dense
SILTY SAND - very dense, wet, gray, fine-grained, tracegravel (up to 3/4 inch in size)
Trace silt, trace hydrogen sulfide odor
POORLY GRADED SAND - dense, wet, gray, fine-grained
FERNANDO FORMATION [Tf]SILTSTONE - hard, moist, gray, with clay
With sand
Trace sand, dark gray
With fine sand, gray
SAM
PLE
LOC
.
Sta 388+80, Lt 10 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 DRILLED3/28/2011 and 3/29/2011GROUND-WATER READINGSDrilling mud bailed on 3/28/2011. Ground-water level measured at 14 feet belowthe ground surface on 3/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
193 feet
G-103(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_(
100-
119)
.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 5/19/2011Checked/Date: LT/PE 9/22/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.3bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
110
105
100
95
90
85
80
75
31.2
32.6
2.1
0.0
5288
-53
More clay
Becomes dark brown, trace fine sand
END OF BORING AT 86½ FEET
NOTES:
Hand augered upper 7 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 readings
SAM
PLE
LOC
.
Sta 388+80, Lt 10 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 DRILLED3/28/2011 and 3/29/2011GROUND-WATER READINGSDrilling mud bailed on 3/28/2011. Ground-water level measured at 14 feet belowthe ground surface on 3/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
193 feet
G-103(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
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IELD
NO
TES\
GIN
T LO
G\N
EW T
EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
100-
119)
.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 5/19/2011Checked/Date: LT/PE 9/22/2011
Project No.: 4953-10-1561 Figure: A-2.3cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
205
200
195
190
185
180
175
23.7
27.1
22.9
19.3
22.1
85
30
90
SP-SC
CL
ML
SM
CL
0.1
0.0
0.1
0.1
0.0
Push
7
13
-
-
95
-
103
21/10"
34
5-inch thick Asphalt Concrete over 10-inch thick PortlandCement ConcreteFILL [Af]POORLY GRADED SAND with CLAY - moist, yellowishbrown, fine to medium-grainedLAKEWOOD FORMATION [Qlw]LEAN CLAY with SAND - moist, dark olive gray, some finesand, trace medium
Becomes medium to coarse sand
Becomes moist, olive, some silt(Disturbed sample)
Becomes very stiff, trace iron oxide stains
SANDY SILT - medium stiff, moist, olive gray, trace clay
SILTY SAND - dense, olive, fine to medium-grained, traceclay nodules
Some coarse sand, trace fine gravel
SAN PEDRO FORMATION [Qsp]LEAN CLAY - stiff, moist, dark greenish gray, some finesand, trace medium, moderately cemented, some calciumcarbonate nodules
SAM
PLE
LOC
.
Sta 402+70, 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 DRILLED5/2/2011 and 5/3/2011GROUND-WATER READINGSGround-water level measured at 34½ feet and 33½ feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
210 feet
G-104
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_(
100-
119)
.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: LHPrepared/Date: JF 6/16/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.4aMTA Westside Subway Extension
Los Angeles, California
PMT
ELEV
ATI
ON
(ft)
165
160
155
150
145
140
135
15.5
23.3
24.0
17.9
17.9
13.3
14.5
74
67
16
24
CL
CL
SM
0.0
0.0
0.0
0.0
0.0
21
15
23
26
-
98
99
-
-
112
-
70
25
68
Becomes hard, more silty, trace gravel, alternatingwith layers of Sandy Lean Clay
LEAN CLAY with SAND - very stiff, moist, dark olive gray,fine to medium sand, trace calcium carbonate nodules
SANDY LEAN CLAY - stiff, moist, greenish gray, fine tomedium sand, trace gravel
SILTY SAND - medium dense, wet, greenish gray, fine tomedium-grained(Disturbed sample)
Becomes moist, dark gray, fine to coarse-grained
Becomes very dense, with thin layer of Silty Sand,trace fine gravel (up to 3/8 inch in size)
SAM
PLE
LOC
.
Sta 402+70, 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 DRILLED5/2/2011 and 5/3/2011GROUND-WATER READINGSGround-water level measured at 34½ feet and 33½ feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
210 feet
G-104(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_(
100-
119)
.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: LHPrepared/Date: JF 6/16/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.4bMTA Westside Subway Extension
Los Angeles, California
PMT
PMT
Tun
nel
ELEV
ATI
ON
(ft)
125
120
115
110
105
100
95
10.633.2
34.7
31.3
33.0
23
94
GM
ML0.1
0.0
0.0
18
--
80
-
-
63/9"
61
75
Trace gravel (up to 1/2 inch in size)
SILTY GRAVEL - very dense, moist, dark olive brown togray, some coarse sand, trace fine to medium, fine to coarsegravel (up to 3/4 inch in size)
SANDY SILT - hard, moist, dark olive brown tobrownish-gray, fine sand, trace clay
FERNANDO FORMATION [Tf]SILTSTONE - very stiff, moist, dark olive brown, trace finesand, trace shell fragments
Becomes hard, weakly cemented
Becomes trace light gray fine-grained sand interbeds weaklyto moderately cemented
END OF BORING AT 101½ FEET
NOTES:
Hand augered upper 6½ feet to avoid damage to utilities.Montoring well was installed on 5/5/2011. See wellconstruction diagram for G-104.
"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: PMT = Pressuremeter
SAM
PLE
LOC
.
Sta 402+70, 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 DRILLED5/2/2011 and 5/3/2011GROUND-WATER READINGSGround-water level measured at 34½ feet and 33½ feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
210 feet
G-104(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_(
100-
119)
.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
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ITIO
NS
AT
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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: LHPrepared/Date: JF 6/16/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561 Figure: A-2.4cMTA Westside Subway Extension
Los Angeles, California
PMT
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
165
15.2
21.6
22.8
29.7
-
21.1
16.9
ML
CL
ML
ML
CL
ML
SM
1.7
1.5
1.7
2.8
2.3
0.5
2.7
12
26
26
46
115
-
100
-
-
-
114
25
22
16
8-inch thick Asphalt Concrete over 5-inch thick PortlandCement ConcreteFILL [Af]SILT - moist, dark gray to black, some clay, some fine sand
Become grayLAKEWOOD FORMATION [Qlw]SANDY LEAN CLAY - moist, dark olive brown, porous, finesand
SANDY SILT - very stiff, moist, olive brown, fine sand, traceclay
SAN PEDRO FORMATION [Qsp]SANDY SILT - very stiff, moist, olive green, fine sand, tracegravel
Trace coarse sand, more gravel (up to 1/4 inch in size)(Sample not recovered)
SANDY LEAN CLAY - very stiff, bluish gray, fine sand
SANDY SILT - hard, moist, bluish gray, fine sand, slightlycemented pods
SILTY SAND - dense, bluish gray, fine-grained
SAM
PLE
LOC
.
Sta 414+50, 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 DRILLED4/30/2011GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
202 feet
G-105
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_(
100-
119)
.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 9/8/2011Checked/Date: LT/PE 9/7/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.5aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
160
155
150
145
140
135
130
125
22.2
24.4
22.4
20.1
20.7
26.3
20.1
37.1
23
20
10
12
ML
SM
SP-SM
SM
2.3
1.9
2.7
2.4
2.9
1.4
3.7
6.9
44
37
89
59
-
100
-
101
-
95
-
85
31
27
64
79
SILT - very stiff, moist, bluish gray, some clay
SILTY SAND - dense, moist, bluish gray, fine-grained, somemedium
Thin layer of Sandy Silt, trace gravel (up to ¼ inch in size)
POORLY GRADED SAND with SILT - very dense, bluishgray, fine-grained, some medium, trace hydrogen sulfide odor
SILTY SAND - very dense, very moist, bluish gray,fine-grained, some Poorly Graded Sand
FERNANDO FORMATION [Tf]SILTSTONE - hard, moist, grayish green, locally bedded,massive, trace fine sand
SAM
PLE
LOC
.
Sta 414+50, 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 DRILLED4/30/2011GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
202 feet
G-105(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_(
100-
119)
.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 9/8/2011Checked/Date: LT/PE 9/7/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.5bMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
120
115
110
105
100
95
90
85
35.3
34.1
49.9
30.3
40.9
32.9
36.6
97
99
3.6
0.5
4.1
0.7
3.4
0.3
4.7
53
74
70
-
84
-
90
-
88
-
58
48
73
57
Becomes dark gray
Becomes dark brown
Becomes blueish gray
Becomes dark olive gray
END OF BORING AT 111½ FEETNOTES:Hand augered upper 5 feet to avoid damage to utilites.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 readings
SAM
PLE
LOC
.
Sta 414+50, 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 DRILLED4/30/2011GROUND-WATER READINGSGround-water level not measured.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
202 feet
G-105(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_(
100-
119)
.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 9/8/2011Checked/Date: LT/PE 9/7/2011
Project No.: 4953-10-1561 Figure: A-2.5cMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
14.8
20.0
26.9
23.5
9.5
13.9
27.9
33.2
18.6
11
47
CL-ML
CL
SM
CL
ML
SM
SW-SM
CH
ML
SC
445
165
104
64.3
44.3
135
134
49.3
243
22
18
37
32
61
112
-
92
-
118
-
97
-
110
26
27
40
16
5-inch thick Asphalt Concrete over 8-inch thick PortlandCement Concrete, 4-inch thick Base CourseFILL [Af]SILTY CLAY - moist, dark grayish black
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - very stiff, moist, brown, fine tomedium sand
SILTY SAND - moist, light brown, fine to medium-grained,some coarse, trace gravelLAKEWOOD FORMATION [Qlw]SANDY LEAN CLAY - very stiff, moist, brown, very finesand
SILT - stiff, moist, olive green, trace sand
SILTY SAND - medium dense, moist to wet, brown, fine tomedium-grained
WELL GRADED SAND with SILT - dense, wet, brown, fineto coarse-grained, trace gravel
Trace gravel (up to 1/2 inch in size)
FAT CLAY - very stiff, moist, olive gray, trace sand
Thin layer of Sandy Silt
SAN PEDRO FORMATION [Qsp]SILT - very stiff, moist, blueish gray, some clay
CLAYEY SAND - very dense, wet, greenish gray,fine-grained, trace gravel (up to 1/2 inch in size)
SAM
PLE
LOC
.
Sta 420+80, Lt 10 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 DRILLED3/23/2011 - 3/25/2011GROUND-WATER READINGSDrilling mud bailed on 3/24/2011. Ground-water level measured at 22 feet belowthe ground surface on 3/25/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
205 feet
G-106
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_(
100-
119)
.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 5/19/2011Checked/Date: LT/PE 9/23/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.6aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
160
155
150
145
140
135
130
29.8
36.6
-
35.1
32.2
21.8
23.9
25.9
21.2
21.6
26.9
25.8
37.0
73
91
97
46
13
ML
ML
ML
SC
SM
SP
SM
SP
SM
32.7
24.7
54.3
619
219
658
30.5
49.4
36.2
232
76.2
115
5.9
22
53
23
49
75/8"
75/5"
-
90
-
-
-
104
-
99
-
104
-
97
-
31
37
29
60
60
61
41
SILT - hard, moist, bluish gray, trace fine sand, some clay
SILT with SAND - very stiff, moist, blueish gray, with thinlayer of fine Silty Sand
Becomes hard, with alternating layers of Poorly Graded Sandwith Silt
Alternating with layers of Sandy Silt, some clay
SILT - very stiff, moist, bluish gray, some clay
CLAYEY SAND - medium dense, moist, bluish gray, fine tomedium-grained
SILTY SAND - very dense, wet, blueish gray, fine tomedium-grained, with thin layer of Silt
POORLY GRADED SAND - dense, wet, blueish gray, fine tomedium-grained
SILTY SAND - very dense, wet, blueish gray, fine tomedium-grained
POORLY GRADED SAND - very dense, wet, blueish gray,fine to medium-grained, trace hydrogen sulfide odor
SILTY SAND - very dense, wet, greenish gray, fine-grained,trace hydrogen sulfide odor
Becomes light greenish gray
Cobble (up to 6 inches in size), trace shell fragmentsFERNANDO FORMATION [Tf]SILTSTONE - hard, moist, greenish gray, massive
SAM
PLE
LOC
.
Sta 420+80, Lt 10 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 DRILLED3/23/2011 - 3/25/2011GROUND-WATER READINGSDrilling mud bailed on 3/24/2011. Ground-water level measured at 22 feet belowthe ground surface on 3/25/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
205 feet
G-106(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_(
100-
119)
.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 5/19/2011Checked/Date: LT/PE 9/23/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.6bMTA Westside Subway Extension
Los Angeles, California
NV
NV
NV
Tun
nel
ELEV
ATI
ON
(ft)
120
115
110
105
100
95
90
33.7
41.9
47.5
9828.6
5.0
4.5
71/11"
59
85
-
69
51
Trace sand
Becomes dark gray
END OF BORING AT 90 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 Sampler12 inches using a 300 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
Downhole Test: NV = Noise/Vibration
SAM
PLE
LOC
.
Sta 420+80, Lt 10 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 DRILLED3/23/2011 - 3/25/2011GROUND-WATER READINGSDrilling mud bailed on 3/24/2011. Ground-water level measured at 22 feet belowthe ground surface on 3/25/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
205 feet
G-106(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
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\6.2
.3.1
GEO
TEC
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EMPL
ATE
- M
AR
CH
14,
201
1\49
53-1
0-15
61_(
100-
119)
.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
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ITIO
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AT
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OC
ATI
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S A
ND
AT
OTH
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IMES
MA
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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 5/19/2011Checked/Date: LT/PE 9/23/2011
Project No.: 4953-10-1561 Figure: A-2.6cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
205
200
195
190
185
180
175
170
21.4
17.6
24.4
16.0
27.6
22.0
15
47
SM
CL
SM
SM
MH
SM
0.0
0.0
0.0
0.0
0.0
0.0
Push
11
10
105
-
98
-
95
-
46
45
21
4-inch thick Asphalt Concrete over 10-inch thick PortlandCement Concrete, No Base CourseFILL [Af]SILTY SAND - moist, olive brown, fine to coarse-grained,some coarse gravel
SANDY LEAN CLAY - very stiff, dry, dark brown, fine sand
More sand
QUATERNARY OLDER ALLUVIUM [Qalo]SILTY SAND with GRAVEL - medium dense, moist, olivebrown, fine to coarse-grained, trace fine gravel
Thin layer of Sandy SiltBecomes yellowish-brown, fine to medium-grained
LAKEWOOD FORMATION [Qlw]SILTY SAND - dense, wet, olive brown, fine tomedium-grained, some coarse
ELASTIC SILT - stiff, moist, light olive, some fine sand, traceiron oxide stains
SILTY SAND - medium dense, moist, greenish gray,fine-grained, some medium
SAM
PLE
LOC
.
Sta 428+40, 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 DRILLED4/28/2011 and 4/29/2011GROUND-WATER READINGSDrilling mud bailed on 4/28/2011. Ground-water level measured at 24 feet belowthe ground surface on 4/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
206 feet
G-107
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_(
100-
119)
.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: LHPrepared/Date: JF 6/10/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.7aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
165
160
155
150
145
140
135
130
16.5
34.4
25.2
18.1
21.9
20.0
24.2
40.2
97
17
21
96
ML
CH
SM
ML
0.0
0.1
0.0
0.1
0.2
0.1
0.0
18
12
33
44
111
-
95
-
100
-
95
-
31
65
75
44
Becomes olive green, fine to medium-grained, more silt
SAN PEDRO FORMATION [Qsp]SILT - hard, moist, olive to grayish brown
FAT CLAY - stiff, greenish gray, trace fine sand
SILTY SAND - very dense, moist, greenish gray, fine-grained,some medium
Becomes dense, olive green, fine-grained, trace medium
Fine to coarse-grained
SILT - hard, moist, olive gray to dark brown, trace fine sand
SAM
PLE
LOC
.
Sta 428+40, 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 DRILLED4/28/2011 and 4/29/2011GROUND-WATER READINGSDrilling mud bailed on 4/28/2011. Ground-water level measured at 24 feet belowthe ground surface on 4/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
206 feet
G-107(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_(
100-
119)
.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: LHPrepared/Date: JF 6/10/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.7bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
125
120
115
110
105
100
95
90
34.3
51.7
28.8
32.0
36.5
91
98
ML0.0
0.0
0.0
0.0
22
25
24
84
-
91
-
82
68
71
SILT with SAND - very stiff, moist, olive grayish brown, somefine sand, some clay
FERNANDO FORMATION [Tf]SILTSTONE - hard, moist, dark-brownish-gray, occasionalfine sand, calcium carbonate nodules
END OF BORING AT 101 FEET
NOTES:
Hand augered upper 6 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 380 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readings
SAM
PLE
LOC
.
Sta 428+40, 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 DRILLED4/28/2011 and 4/29/2011GROUND-WATER READINGSDrilling mud bailed on 4/28/2011. Ground-water level measured at 24 feet belowthe ground surface on 4/29/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
206 feet
G-107(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_(
100-
119)
.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: LHPrepared/Date: JF 6/10/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561 Figure: A-2.7cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
200
195
190
185
180
175
170
165
16.8
10.3
12.0
9.3
22.6
20.5
26.0
53
11
SM
CL
SP-SM
SP
SW
CL
SM
0.0
0.0
0.0
0.0
0.0
0.0
0.0
20
20
24
13
108
110
-
120
-
108
-
22
19
32
6-inch thick Asphalt Concrete over 12-inch thick PortlandCement ConcreteFILL [Af]SILTY SAND - moist, light brown, fine-grained, trace gravel
QUATERNARY OLDER ALLUVIUM [Qalo]SANDY LEAN CLAY - very stiff, moist, light brown, fine tomedium sand, trace gravel
POORLY GRADED SAND with SILT - medium dense,yellowish brown, medium-grained, some fine and coarse, somegravel (up to 1/2 inch in size)
POORLY GRADED SAND - medium dense, moist, grayishbrown, fine to medium-grained
WELL GRADED SAND with GRAVEL - medium dense, verymoist, yellowish brown, fine to coarse-grained
LAKEWOOD FORMATION [Qlw]SANDY LEAN CLAY - very stiff, very moist, yellowish olivebrown, fine to medium sand, trace silt
Become stiff
SILTY SAND - dense, very moist, dark olive green,fine-grained
SAN PEDRO FORMATION [Qsp]
SAM
PLE
LOC
.
Sta 435+30, 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 DRILLED5/9/2011 and 5/10/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 21 feet below the groundsurface on 5/10/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
201 feet
G-108
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_(
100-
119)
.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: HTYPrepared/Date: JF 6/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.8aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
160
155
150
145
140
135
130
125
25.6
30.7
39.3
34.2
17.5
35.0
38.2
41.2
93
CL-ML
CL-ML
SP-SM
MH
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
17
6
19
23
99
-
79
-
101
-
81
-
25
60
32
35
SILTY CLAY with SAND - very stiff, olive green, trace ironoxide stains
SANDY SILTY CLAY - very stiff, very moist, olive green, finesand
Becomes medium stiff, greenish gray
POORLY GRADED SAND with SILT - very dense, wet, darkolive green
Becomes medium dense, dark olive gray, trace gravel
ELASTIC SILT - very stiff to hard, moist, dark olive green,trace fine sand
Becomes dark greenish gray, some fine sand
Becomes dark olive green to olive brown
SAM
PLE
LOC
.
Sta 435+30, 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 DRILLED5/9/2011 and 5/10/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 21 feet below the groundsurface on 5/10/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
201 feet
G-108(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_(
100-
119)
.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: HTYPrepared/Date: JF 6/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.8bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
120
115
110
105
100
95
90
85
42.9
32.3
31.1
39.5
37.7
36.9
37.6
31.2
98
89
97
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
16
16
12
21
14
16
74
-
88
-
82
81
81
89
62
57
Becomes dark olive brown
Becomes olive green, trace fine sand
Alternating with layers of Lean Clay
FERNANDO FORMATION [Tf]SILTSTONE - stiff to very stiff, moist, dark brown, trace finesand
Trace fine and medium sand
Trace fine sand
SAM
PLE
LOC
.
Sta 435+30, 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 DRILLED5/9/2011 and 5/10/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 21 feet below the groundsurface on 5/10/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
201 feet
G-108(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_(
100-
119)
.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: HTYPrepared/Date: JF 6/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.8cMTA Westside Subway Extension
Los Angeles, California
Tun
nel
ELEV
ATI
ON
(ft)
80
75
70
65
60
55
50
45
32.20.0 1583 Becomes grayish, some lenses of fine sandEND OF BORING AT 121 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry andpatched with 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 380 pound hammer falling 18 inches
**Photo Ionization Detector used for OVA readingsSA
MPL
E LO
C.
Sta 435+30, 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 DRILLED5/9/2011 and 5/10/2011GROUND-WATER READINGSDrilling mud bailed. Ground-water level measured at 21 feet below the groundsurface on 5/10/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
201 feet
G-108(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_(
100-
119)
.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: HTYPrepared/Date: JF 6/9/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561 Figure: A-2.8dMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
210
205
200
195
190
185
180
175
23.3
11.9
12.6
16.5
14.2
34.5
15
SM
SP
SW
SM
CL
SP
SM
SW
ML
5.6
3.8
1.5
3.4
3.4
4.1
20
58
32
96
-
116
-
116
-
34
46
20
8-inch thick Asphalt Concrete over 10-inch thick PortlandCement Concrete and 5-inch thick Base CourseFILL [Af]SILTY SAND - moist, brown, fine to medium-grained
LAKEWOOD FORMATION [Qlw]POORLY GRADED SAND - moist, light brown, fine tomedium-grained
WELL GRADED SAND with GRAVEL - moist, light brown,fine to coarse-grained
SILTY SAND - medium dense, moist, light brown, fine tomedium-grained
SANDY LEAN CLAY - moist, light brown, thin layer of finesand
POORLY GRADED SAND - dense, moist, olive gray, fine tomedium-grained, trace coarse, trace gravel (up to 1/4 inch insize)
Becomes olive yellow, more gravel (up to 3/4 inch in size)
SILTY SAND - dense, moist, brown, medium-grained, tracefine and coarse, trace fine gravel
WELL GRADED SAND - medium dense, wet, olive gray, fineto coarse-grained, some fine gravel, trace micaSILT - very stiff, moist, light olive, some clay
Becomes very moist, trace very fine sand
SAM
PLE
LOC
.
Sta 442+30, Lt 45 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 DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSGround-water level measured at 28½ feet and 41 feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-109
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_(
100-
119)
.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 6/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.9aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
170
165
160
155
150
145
140
135
26.3
34.2
18.0
19.5
20.5
22.7
36.6
45.8
20
30
SM
CL-ML
SM
3.7
4.7
4.1
4.7
3.5
3.6
3.6
27
54
80
49
94
-
106
-
104
-
80
-
31
71
69
50
SAN PEDRO FORMATION [Qsp]SILTY SAND - medium dense, very moist, brownish gray,fine-grained
SILTY CLAY - hard, moist, light olive gray, trace fine sand
SILTY SAND - very dense, wet, olive, fine-grained, somemedium
Becomes light brownish gray, slight hydrogen sulfide odor
Trace medium sand
Trace shell fragments and cobble (up to 4 inches in size)FERNANDO FORMATION [Tf]SILTSTONE - hard, moist, greenish gray, some fine sand,weakly cemented, dipping 30 degrees
SAM
PLE
LOC
.
Sta 442+30, Lt 45 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 DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSGround-water level measured at 28½ feet and 41 feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-109(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_(
100-
119)
.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 6/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.9bMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
130
125
120
115
110
105
100
95
36.2
49.4
52.6
-
32.8
41.6
51.6
32.0
98
94
3.6
4.1
4.1
3.4
2.9
1.5
2.7
38
37
78
55
85
-
73
-
88
-
69
-
40
40
43
65
Trace fine sand
(Sample not recovered)
Becomes very dark olive gray to dark greenish gray,small sand pockets, light gray
Trace calcium carbonate nodules
SAM
PLE
LOC
.
Sta 442+30, Lt 45 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 DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSGround-water level measured at 28½ feet and 41 feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-109(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_(
100-
119)
.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 6/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.9cMTA Westside Subway Extension
Los Angeles, California
PMT
PMT
PMT
Tun
nel
ELEV
ATI
ON
(ft)
90
85
80
75
70
65
60
55
35.6
31.3
37.5
35.6
35.0
96
2.9
2.7
1.2
4.9
5.6
60
58
60
85
-
78
-
80
41
42
Trace very fine sand
END OF BORING AT 141 FEET
NOTES:
Hand augered upper 5 feet to avoid damage to utilities.Montoring well was installed on 5/11/2011. See wellconstruction diagram for G-109.
"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 442+30, Lt 45 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 DRILLED5/9/2011 - 5/11/2011GROUND-WATER READINGSGround-water level measured at 28½ feet and 41 feet below the ground surfacein shallow and deep monitoring wells, respectively on 7/29/2011. See last pageof this boring for details.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-109(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_(
100-
119)
.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: JF 6/21/2011Checked/Date: LT/PE 9/26/2011
Project No.: 4953-10-1561 Figure: A-2.9dMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
210
205
200
195
190
185
180
175
16.3
25.7
23.8
14.2
10.5
13.7
30.6
11
ML
ML
CH
SW-SM
CH
8.5
7.2
5.2
5.9
4.1
6.8
5.4
15
18
36
25
113
-
96
-
107
-
90
15
29
48
7½-inch thick Asphalt Concrete over 5-inch thick PortlandCement ConcreteFILL [Af]SANDY SILT - moist, olive, fine sand, some clay, slightlyporous
Thin layer of Silty SandLAKEWOOD FORMATION [Qlw]SILT - stiff, moist, light brown, slightly porous, some clay
FAT CLAY with SAND - stiff, moist, light brown, fine tomedium sand
WELL GRADED SAND with SILT - medium dense, moist,olive, fine to medium-grained, some coarse sand, trace gravel(up to 1/4 inch in size)
Becomes olive yellow
Becomes dense, more silt, some gravel (up to 1/4 inch in size)
FAT CLAY with SAND - very stiff, moist, light brown andblueish gray
SAM
PLE
LOC
.
Sta 450+30, 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 DRILLED4/28/2011 - 5/2/2011GROUND-WATER READINGSDrilling mud bailed on 4/29/2011. Ground-water level measured at 31 feet belowthe ground surface on 5/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-110
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_(
100-
119)
.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 8/9/2011Checked/Date: JAG/PE 9/28/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.10aMTA Westside Subway Extension
Los Angeles, California
ELEV
ATI
ON
(ft)
170
165
160
155
150
145
140
135
33.0
24.8
29.8
13.7
18.6
15.1
22.3
47.3
8
9
98
CL
SM
ML
SP-SM
7.2
6.8
6.1
6.1
3.8
4.7
4.5
5.2
25
63
57
60
-
99
-
-
-
110
-
72
24
23
52
76
Becomes blueish gray
SAN PEDRO FORMATION [Qsp]SANDY LEAN CLAY - very stiff, moist, light olive gray, fineto medium sand
SILTY SAND - moist, blueish gray, fine to medium-grained
SILT - moist, bluish gray, trace fine sand, some clay
POORLY GRADED SAND with SILT - very dense, olivegray, fine to medium-grained
Becomes dense, trace shell fragments
FERNANDO FORMATION [Tf]SILTSTONE - hard, moist, greenish gray, trace fine sand,weakly cemented
SAM
PLE
LOC
.
Sta 450+30, 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 DRILLED4/28/2011 - 5/2/2011GROUND-WATER READINGSDrilling mud bailed on 4/29/2011. Ground-water level measured at 31 feet belowthe ground surface on 5/2/2011.
BOREHOLE LOCATION
DRILLING COMPANY/DRILLING EQUIPMENT
212 feet
G-110(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_(
100-
119)
.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 8/9/2011Checked/Date: JAG/PE 9/28/2011
Project No.: 4953-10-1561
(CONTINUED ON FOLLOWING FIGURE)
Figure: A-2.10bMTA Westside Subway Extension
Los Angeles, California
PMT
PMT
Recommended