APPENDIX A GEOTECHNICAL INVESTIGATION -...

Preliminary Geotechnical and Environmental Report

Appendix A – Geotechnical Investigation

W E S T S I D E S U B W A Y E X T E N S I O N P R O J E C T December 21, 2011

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

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IELD

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G\A

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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

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CO

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. TR

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SITI

ON

S B

ETW

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STR

ATA

MA

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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

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JUN

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1.G

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61_M

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\6.2

.3.1

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ICA

L D

ESIG

N\3

.2 A

LL F

IELD

NO

TES\

GIN

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G\A

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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

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AT

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EXPL

OR

ATI

ON

LO

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ATI

TUD

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LO

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ITU

DE

OF

BO

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SH

OW

N O

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S A

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RO

XIM

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BSU

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S B

ETW

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ATA

MA

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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_

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ECTO

RIE

S\49

53\2

010\

1015

61_M

ETR

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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\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

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ND

LO

NG

ITU

DE

OF

BO

RIN

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OC

ATI

ON

SH

OW

N O

N L

OG

S A

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APP

RO

XIM

ATE

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BSU

RFA

CE

CO

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ITIO

NS

AT

OTH

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OC

ATI

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S A

ND

AT

OTH

ER T

IMES

MA

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IFFE

R.

INTE

RFA

CES

BET

WEE

N S

TRA

TA A

RE

APP

RO

XIM

ATE

. TR

AN

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S B

ETW

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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

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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)

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

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OC

ATI

ON

S A

ND

AT

OTH

ER T

IMES

MA

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IFFE

R.

INTE

RFA

CES

BET

WEE

N S

TRA

TA A

RE

APP

RO

XIM

ATE

. TR

AN

SITI

ON

S B

ETW

EEN

STR

ATA

MA

Y B

E G

RA

DU

AL.


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

Increased sand content

(Sample not recovered)POORLY GRADED SAND with SILT - very dense, wet,bluish gray, fine to medium-grained

Slightly darker gray, slight organic smell

FERNANDO FORMATION [Tf]SILTSTONE - weak, wet, greenish gray, massive

SAM

PLE

LOC

.


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

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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)

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

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S A

ND

AT

OTH

ER T

IMES

MA

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IFFE

R.

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CES

BET

WEE

N S

TRA

TA A

RE

APP

RO

XIM

ATE

. TR

AN

SITI

ON

S B

ETW

EEN

STR

ATA

MA

Y B

E G

RA

DU

AL.


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 test

No sample due to pressure meter testEND OF BORING AT 95 FEET

NOTES:

Hand augered upper 5 feet to avoid damage to utilities.Pressure meter tests performed at 35, 50, 90, and 95 feet.Ground-water level measured at 28 feet below ground surface2 days after completion of drilling. Two separate 1-inchdiameter ground-water monitoring wells extending to 30 feetand 60 feet, respectively, installed in borehole uponcompletion of drilling (see well construction diagram for G-4).





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




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APPENDIX A GEOTECHNICAL INVESTIGATION -...

Documents