preliminary geotechnical and environmental report · and environmental report ... dilatometer test...

`

Prepared for:

Prepared by:

777 South Figueroa Street Suite 1100 Los Angeles, California 90017

Review Copy

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.


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


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




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


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


NOTES:


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561


Figure: A-1.1bMTA Westside Subway Extension


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

.


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


BOREHOLE LOCATION


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

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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.


Project No.: 4953-10-1561 Figure: A-1.1cMTA Westside Subway Extension


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


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.


Project No.: 4953-10-1561




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


(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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:






SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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.


Project No.: 4953-10-1561




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 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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


FERNANDO FORMATION [Tf]SILTSTONE


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).





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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




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


Some silt lenses, grayish brown

Some fine gravels


SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


Gray, contains less tar


NOTES:






SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




Wils

hire

/ Fai

rfax

Sta

tion

ELEV

ATI

ON

(ft)

80

75

70

65

60

55

50

45

- -50/5"


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).





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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)


SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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



Subrounded gravel up to 1/4 inch in size, faint laminations


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




Tun

nel

ELEV

ATI

ON

(ft)

55

50

45

40

35

30

25

37.6 -38


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


Alternating with sandier lenses

SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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)


CLAYEY SAND with GRAVEL - medium dense to verydense, moist, brown, fine to coarse-grained

SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




Tun

nel

ELEV

ATI

ON

(ft)

90

85

80

75

70

65

60

55

16.2 25113END OF BORING AT 81 FEET

NOTES:






SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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).





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:






SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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


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.


Project No.: 4953-10-1561




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)


SANDY LEAN CLAY - hard, wet, gray with brown mottling,trace subrounded and subangular gravel(LL=42, PI=22)


CLAYEY SAND - very dense, wet, brown, fine-grained, tracemedium, trace silt, contains carbonate-lined root cracks andcarbonate nodules


FAT CLAY - wet, brown

SILTY SAND - very dense, wet, reddish brown, fine tomedium-grained, trace clay(NP, NP)


SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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.


*Number of blows required to drive the Crandall Sampler12 inches using a 300 pound downhole hammer falling 18inches



SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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



SAM

PLE

LOC

.


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


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.


Project No.: 4953-10-1561




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)



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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




Tun

nel

ELEV

ATI

ON

(ft)

200

195

190

185

180

175

170

165

-

-

75-

-50/6"


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

.


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


BOREHOLE LOCATION


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.




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

.


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


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




Tun

nel

ELEV

ATI

ON

(ft)

165

160

155

150

145

140

135

130

13.4 40122

63


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

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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).





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:






SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.







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


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

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 8/9/2011Checked/Date: AB/LT 9/23/2011

Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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

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.


Project No.: 4953-10-1561




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


NOTES:

Hand augered upper 8 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith quick set cement.


*Number of blows required to drive the Crandall Sampler 12inches using a 140 pound automatic hammer falling 30 inches


SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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

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.




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

.


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


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

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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:

Hand augered the upper 8 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith asphalt concrete.




Downhole Test: PMT = Pressuremeter

SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:

Hand augered upper 7 feet to avoid damage to utilities.Borehole grouted with cement-bentonite slurry and patchedwith asphalt concrete.




SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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)

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.




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

.


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


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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

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.




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

.


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


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




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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.




SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:





Downhole Test: NV = Noise/Vibration

SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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)

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.




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


NOTES:





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.




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

.


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


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561


Figure: A-2.8cMTA Westside Subway Extension


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.



**Photo Ionization Detector used for OVA readingsSA

MPL

E LO

C.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561 Figure: A-2.8dMTA Westside Subway Extension


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

.


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


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.


Project No.: 4953-10-1561




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

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561




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


Becomes very dark olive gray to dark greenish gray,small sand pockets, light gray

Trace calcium carbonate nodules

SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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

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CT_

DIR

ECTO

RIE

S\49

53\2

010\

1015

61_M

ETR

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ESTS

IDE_

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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

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AT

OTH

ER L

OC

ATI

ON

S A

ND

AT

OTH

ER T

IMES

MA

Y D

IFFE

R.

INTE

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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.


Project No.: 4953-10-1561


Figure: A-2.9cMTA Westside Subway Extension


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


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.





SAM

PLE

LOC

.


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


BOREHOLE LOCATION


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.


Project No.: 4953-10-1561 Figure: A-2.9dMTA Westside Subway Extension


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

.


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


BOREHOLE LOCATION


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




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

.


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


BOREHOLE LOCATION


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




PMT

PMT

preliminary geotechnical and environmental report · and environmental report ... dilatometer test...

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