I

I

I

I

\

:-1

I

i

I

,

and performed a 360-degree scanning sonar survey. The positioning report, prepared by Fugro Chance, is

presented

in Appendix C. The scanning sonar reports are available from Fugro Chance upon request.

Boring

Boring

Designation

Designation

by-Fugro-

Chance"

Boring 1

Core 1

Boring 2

Core 2

Boring 3

Core 3

Boring 4

Core 4

Table 1: Final

Boring Coordinates

(Texas South Central ZoneCoordinates)

Block

Proposed Boring

Final Boring

Number

Coordinates (ft)

Coordinates (ft)

-(Galvestoll

Area)

363

X = 3,204,371.92

X = 3,204,379

Y = 327,915.88

Y = 327,917

362

X = 3,206,611.55

X = 3,206,625

Y =325,019.26

Y = 325,015

380

X = 3,208,819.93

X = 3,208,821

Y =322,163.06

Y = 322,164

380

X = 3,210,977.64

X = 3,210,977

Y =319,372.40

Y = 319,369

* Refer to positioning report

by

Fugro Chance presented in Appendix C.

Boring

Termination

Depth-(ft)-

26

26

26

26

Samples were obtained through 5.0-in.-OD, 4.5-in.-IF drill pipe at 3-ft intervals

to 26-ft penetration.

A 2.50-in.-OD liner sampler was used to between 12- and 26-ft penetration at the boring locations. The

remaining samples were taken using a 2.25-in.-OD thin-walled, Shelby tube sampler that was pushed into

the soil with the weight of the drill pipe or driven into the soil. The drilling and sampling techniques used to

complete this boring are explained

in detail in Appendix

A.

The Summary of Field Operations is also

presented

in Appendix

A.

The water depths at the boring locations were estimated using the wireline technique and are

presented

in Plate 1b. The water depth measurements are intended for the purpose of the geotechnical

investigation only, and are not corrected for tidal or other variations. If utilized for other purposes, the water

depth measurement should be adjusted

to account for meteorological tide and datum corrections. The

water depth measuring procedures are explained

in detail in Appendix

A.

Field and Laboratory Tests

The soil testing program was designed to evaluate pertinent index and engineering properties of

the foundation soils. During the field operation, all samples were extruded from the sampler and classified

by the soil technician or field engineer. Unit weight, Torvane, pocket penetrometer, and miniature vane

were performed

in the field on selected cohesive samples. All of the samples were shipped to Fugro's

Houston laboratory where Atterberg limit tests, water content tests and grain-size analyses, as well as

additional density tests, unconsolidated-undrained triaxial compression tests,

and miniature vane tests,

were performed.

A description

of relevant laboratory procedures is provided in Appendix

A.

The strength and

classification test results are presented graphically

on the Log of Boring and Test Results (Plates 2 through

5) and are tabulated in Appendix

A.

I

Report No. 0201.6508

2

._@------------

---

GENERAL SOIL CONDITIONS

The soil stratigraphy disclosed by the field and laboratory investigations is presented

on

the boring

logs, Plates 2 through

5, The soil stratigraphy is based on the classification of soil samples recovered from

the four borings and observations made during drilling operations. A generalized summary of the major soil

strata is tabulated below:

I

Boring 1

Penetration, ft

.

Stratum

From

To

Description

, 1

1

!

I

I

.

,

i ,I

-I

Boring

2

Strata

I

II

III

Boring

3

Strata

I

II

III

Boring

4

Strata

I

II

III

o

26

Penetration, ft

From

To

o

12

12

21

21

26

Penetration, ft

From

To

o

12

19

12

19

26

Penetration, ft

From

To

o

9

19

9

19

26

Very soft to soft clay

Description

Very soft clay

Soft

to stiff clay

Soft to firm clay to sandy lean clay

Description

Very soft

to soft clay

Firm to stiff clay

Firm lean clay interlayered with loose

sandy silt to silty fine sand

Description

Very soft

to soft clay

Firm clay

Loose silt with sand to sandy silt

Detailed soil descriptions that include textural variations and inclusions are noted

on the boring

. logs, A key to the terms and symbols used

on the boring log is presented on Plate 6. The Roman numeral

representing each stratum

is also shown on the boring log.

.I

Report No. 0201-6508

,._@-----------

3

---

CONCLUSIONS AND RECOMMENDATIONS

: I,

The geotechnical investigation along the proposed TOPS 42-in. Export Pipeline, Coastwise Safety

I.

Fairway Crossing in Blocks 362, 363, and 380 of the Galveston Area in the Gulf of Mexico consisted of four

I'

I:

'jl

')'

,J

Ii

~i

1

~I!

,.

Ii

.1,

,

-Ii

i

I,

soil borings and field and laboratory testing.

A summary of the pertinent conclusions and

recommendations follows.

•

Four Bonngs were used-U)c;naractenze tile sOllcondlttolls"al<:ifl"lJtl1e

proposeapipelinrne.-------

corridor.

•

Scanning sonar surveys were performed at each boring location and

is available upon

request.

•

Water depth measurements

of 73-, 80-, 79-, and 82-ft were measured at Boring 1, Boring

2, Boring 3, and Boring 4 locations, respectively.

•

No engineering analyses were requested for these locations.

SERVICE WARRANTY

Appendix B contains the "Service Warranty," which outlines the limitations and constraints of this

report

in terms of a range of considerations including, but not limited to, its purpose, its scope, the data on

which it is based, its use by third parties, and possible changes in the conditions at the site with time. This

section represents a clear description

of the constraints, which apply to all reports issued by FMMG. It

should be noted that the Service Warranty does not in any way supersede the terms and conditions of the

contract between FMMG and the Client.

i'_@ Report No. 0201-6508

4

---

--------------------------------@-

B099-~OW

.oN

~odelJ

r

I

I

I,

I

1-,

L

I'

r

I

SNOI.l'l1~.lSnlll

I

r

I

I:

1 :

I

\

I

I

---

;~:-=-.---

-~

I~

I

,

,

,

,

,

•

I

l

~

~

m

"

II

, \

,I

!

I.

. I

)bo

-

--,

ell

0

-ro~

!

).:::

•

l~

f

,

I~

m

!

x

=

3,202,500 ft

~

Y

=

330,700 ft

Block 363

Galveston Area

~

Boring 1

•

~

Y

=

326,700 ft

~

Y

=

322,700 ft

Block 379

~

Galveston Area

~

Y

=

318,700 ft

J.

J.

Projection: Texas South Central Zone Coordinates

Scale: 1 in

=

2,000 ft

• Boring 2

X

=

3,210,500 ft

<II

Block_362

N-

Galveston Area

~

<II

<II

<II

Boring 3

•

Block 380

Galveston Area

<II

Boring 4

•

<II

J.

J.

PLAN OF BORINGS

) _@Report No. 0201-6508

42-in, Export Pipeline, Coastwise Safety Fairway Crossing

Blocks 362, 363, and 380, Galveston Area

PLATE 1a

---

I

I

@

I

'"

ro

0

"0

0

"-

z

-Checkr--' -

_

~.-

J

I

18y: .

'-

IO/?~'"

Q'

D,' --- '"/2-"-"1<>;""

Da~/

C;-Rlt'

--

--

--

--

-- --

T-"

• ' ..... _._-

-J'

_r-

x

=

3,210,977'

IDENTIFICATION

TESTS, [%}

UNDRAINED SHEl STRENGTH

y=

319,369'

BLOW

20

.0

60

80

COUNT

Texas South Central Zone Coordinates

SUBMERGED UNIT WEIGHT,

[kef]

IksfJl

SEAFLOOR AT EL. - 82'

0.03

00.

0,05

0.06

0.2

0.4

0,6

0.8

f-I

VERY SOFT TO SOFT OLIVE GRAY CLAY

WOH

o •

"

..

-with sand pockets to 5'

o

~

0

:l

"

In

5

'"

0

'"

~

-with a few shell fragments 10 l'

WOH

0

[J.

~

0

-with

a

few sand pockets and shell fragments

below 6'

WOH

0

0

~

••

19.0'

----

-----

-....+

5

10

"-

FIRM OLIVE GRAY CLAY

WOH

I

-with a

few

sand seams to 14'

10

-with

a

few sand pockets to 11'

•

<

"'"

Q)

~

.:

15

0

0

'jij

Q)

(J)

a;

;;:

0

20

al

"

0

~

Qi

25

"

Q)

0..

I

-with

a

few shell fragments, 12' to 17'

-with sand pockets at 13'

PUSH

-g---

$

II

,

----

..--+

$

•

i-

I

-with

a

few sand pockets below 15'

-with

a

few pockets of organic matter at 16'

~

PUSH

DlIl _

A

...

•

$

r-.

(19.0'

PUSH

0

LOOSE OLIVE GRAY SILT WITH SAND TO

0

I

1-:

SANDY SILT

-with

clay pockets

PUSH

o:IiI:/I.

111"

-with shell fragments to 20'

-

A

....

-with a clay layer, with sand pockets and a few shell

fragments at 22'

I- «.

-with sam:! at 23'

10

1-"

-with a

feW~Qme~s at~

__

J~

1--

r---

---

"'"

J--

_.-

1--

t----

I-

t--

--

1ii

15

~

'-'

0

0

'jij

Q)

(J)

20

§

Q)

al

c:

0

25

""

'"

~

Qi

c:

Q)

0..

30

I-

30

35

i-

35

40

SAMPLING TECHNIQUES

CLASSIFICATION TESTS

STRENGTHITESTS

40

"U

~

'"

Number of blows of a 175-lb weight (hammer) dropped approximately 5 ft to produce a

T

SOLUBILITY IN

Hel, [%J

®

POCKET PENETROMETER

(pr

maximum

of

24 In. of penetration of a 2.25-in.-OO, 2.125-1n.-ID thin-walled tube

•

PERCENT PASSING -200 SIEVE,

[%J

•

TORVANE (TV)

sampler "PUSH' denotes a 2.25-1n.-OO, 2.125-1n.-ID thin-walled tube sampler was

•

WATER CONTENT (W). [%1

~

REMOTE VANE (RV)

advanced 24

In. With Ihe weIght of the drill string. ''WOH" denotes a 2.50-ln.-OD,

o

SUBMERGED UNIT WEIGHT (SUW)

•

MINIATURE VANE (MV)

(-& RESIDUAL (MVres) VALUE)

2.125-Jn.-ID liner sampler was advanced 24 in. with the weight

of the hammer.

... UNCONSOLIDATED UNDRAINED TRIAXIAL (UU)

PLASTIC LIMIT (PL)

LIQUID LIMIT

(ll)

(0,00 "mbol,

I,,,,,,,,

cemolJ (,) ""')

+----------------------+

LOG OF BORING AND TEST RESULTS

42-in. Export Pipeline, Coastwise Safety Fairway Crossing, Baring 4

Block 380, Galveston Area

---

~

~

r;,o

~

TERMS AND SYMBOLS USED ON BORING LOG

SOIL TYPES

SAMPLER TYPES

" "

°

0

°

0

...,..:....

Thin-

Liner

.•.

Walled

D

..:..

Sand

m

Sllt

~Clay

'.:0 Gravel

~.,

Debris

~

~

Tube

f---------mSIIV--fIT(] S"""v-I!%! Sam:lY-a

P"ator- •••• Coral--- -

--

lJ::j]

Sand

IillI

Slit

~

Clay

B

~%~%c

.:..

~

~

~lnSiLU

~Test

~

~

liJ

J

, 1

II

'\!'"

","

I

~

;3

;; ..

('3;.

I}

~~

~

•

1

•

~

Q

U

:t

~Ciayey

mCJayey

mSiity

~Rock

fmShel1

§~~~

Piston

~Sand

m

S11t

Welay

~

~

~NO

~ReCOVery

SOIL GRAIN SIZE

u.s. STANDARD SIEVE

3.

~,.

,.

,.

2••

COBBLES

GRAVEL

SAND

SILT

CLAY

COARSE

FINE

COARSE I

MEDIUM

FINE

152

76.2

19.1

4.76

2.00

0.420

0.074

0.002

SOIL GRAIN SIZE IN MILLIMETERS

STRENGTH OF COHESIVE SOILS')

Undrained

DENSITY OF GRANULAR SOILS

2•3)

Consistency

Shear Strength,

Kips Per Sq Ft

Descriptive

Term

*Relative

Density, %

Very Soft........................................

less than 0.25

0.25 to 0.50

0.50

to 1.00

Very Loose ................................................ less than 15

Soft............................................................

Loose........•.•.........•.........................................

15t035

Firm.•.........................................................

Medium Dens6.................................................

35 to 65

Stiff............................................................

1.00 to 2.00

Dense.............................................................

65

to

85

Very

Stiff....................................................

2.00 to 4.00

Very Oens9............................................

greater than

85

Hard.....................................................

greater than 4.00

"Estimated from sampler driving record

Slickensided ..........................

Fissured................................

Pocket..................................

Parting

..-................................

Seam....•••..........•..................

Layer.•..•......••..•........•...........

Laminated..............•..........•...

Interlayered...........................

Intermixed......•....•........••.•.•...

Calcareous............................

REFERENCES:

(1) ASTM D 2488

(2)

ASCE Manual 56 (1976)

(3)

ASTM D 2049

Report No. 0201-6508

SOIL STRUCTURE(')

Having planes of weakness that appear slick and glossy. The degree of slickensidedness depends

upon the spacing

of slickensides and the ease of breaking along these planes.

Containing shrinkage

or relief cracks, often filled with fine sand or silt, usually more or less vertical.

Inclusion

of material of different texture that is smaller than the diameter of the sample.

Inclusion less

than 1/8 inch thick extending through the sample.

Inclusion 1/8 inch to 3 inches thick extending through

the sample.

Inclusion greater than 3 inches thick extending through the sample.

Soil sampte composed

of alternating partings or seams of different soil types.

Soil sample composed

of alternating layers of different soH types.

Soil sample composed

of pockets of different soil types and layered or laminated structure Is not

evident.

Having appreciable quantities of carbonate.

Infonnation on each boring log

[s a compilation of subsurface conditions and sailor rock

classifications obtained from the field as well as

from laboratory testing of samples. Sirata have been

interpreted

by commonly accepted procedures. The stratum lines on the log may be transitional and

approximate in nature.

Water level measurements refer only to those observed at the times and

places indicated in the text. and

may vary with time, geologic condition or construction activity.

PLATE 6

---

I

~

"-

z

~

~

'"

~

"

~

z;

w

I

i

Summary of Test Results

Identification Tests

Passing

Liquid

Plastic

Moisture

Submerged

N,.

Sample

Depth

Llquldlr:y

Limit

L.lmlt

Content

UnltWeloht

,,,

N,.

(ft)

Index

1%)

(%)

(%J

(pef)

Si&VO

1

0.40

2

1.00

49

41

3

4.00

38

4

4.50

43

5

5.00

49

5

5.00

•

7.00

47

7

7.50

42

8

B,DO

.87

74

19

66

•

10.00

40

1.

10.50

40

11

11.00

72

11

11.00

12

13.00

13

13.50

44

1.

14.00

.76

74

19

61

15

16.00

1.

16.50

41

1.

16.50

17

17.00

18

18,50

47

1.

19,00

32

NOTES:

TYPE OF TEST

U

- Unconfined Compression

UU- Unconsolidated-Undrained Triaxial

CU- Consolidated-Undrained Triaxial

t-

10/z.-/0

'"

,

,

I

Job No.:

0201-6508-4

02-pct-2008 (Ver. #9)

Boring:

42-in. Export Pipeline, Coastwise Safe

Fairway Crossing, Boring 4

Block: 380

Area: Galveston

Strength Estimate

Miniature Vane Tests

compreSSi~n

Tests

(ksf)

(ksf)

MOisture

COllnninll

Undisturbed

Rom"'''1

g"

Submerged

Failure

Type

Conlent

Pressure

Strength

Strength

Strain

Unit Weight

Strain

Type of

Penetrometer

Torvana

Undlsturbad

Remolded

ReSidual

Test

(%)

(pSi)

('"

('"

(%)

(,of)

('/oj

Failure

0.15

0.06

1

0.10

1

1

1

0.06

1

0.23

1

1

0.26

0.10

1

0.28

1

1

0.80

1

0.19

1

0.61

1

0.66

1

0.68

0.89

1

0.82

1

UU

50

120

0.221

43

UU

53

120

0.58

1

0.3

42

8

AC

0.74

0.66

1

1

0.72

0.81

1

TYPE OF FAILURE

Plus Signs

[+J

de~~:e

tests which exceeded the

A - Bulge

capacity of the me suring device,

B

- Single Shear Plane

NP = Non Plastic

~aterial

C

-

Multiple Shear Plane

0- Vertical Fracture

---

---

I

~

ro

"C

o

"-

Z

o

S

'"

~

~

~

i

, ,

-

u

" -

Job No.:

Summary of Test Results

Boring:

Block:

Area:

Identification Tests

Strength Estimate

Miniature Vane Tests

Passing

(ksf)

(ksf)

Liquid

Plastic

Moisture

Submerged

No.

Sample

Depth

Liquidity

Limit

L1mlt

Conlan{

UnilWeight

'"

No.

1ft)

Index

I%)

("!oj

("!oj

,,01)

SIeve

penetrometer

TONana

Undisturbed

Remolded

Residual

2.

19.50

59

60

21

22.00

52

69

22

22.50

52

22

22.50

23

22.70

0.80

0.70

2.

23.00

71

25

25.00

61

26

26.00

60

NOTES:

TYPE OF TEST

TYPE OF FAILURE

U

~

Unconfined Compression

A - Bulge

UU- Unconsolidated-Undrained Triaxial

B

- Single Shear Plane

CU- Consolidated-Undrained Triaxial

C

-

Multiple Shear Plane

D

- Vertical Fracture

1:

,

0201-6508-4

02-6ot-2008 (Ver.

#9)

42~in.

Export Pipeline, Coastwise Safe

Fairway

Crossing, Boring 4

380

Galveston

Compressi'f'n Tests

MoIsture

Confining

Undisturbed

Remolded

",.

Submerged

Failure

Type

Cantan!

Pressure

Strength

Stnmgth

Strain

UnltWelghl

Strain

Type

of

T.~

(%)

(psI)

'"''

'"''

1%)

(pef)

)%)

Failure

1

UU

33

115

0.281

53

UU

35

120

0.67

1

0.9

51

6

AC

1

1

1

Plus Signs [+]

den~te

tests which exceeded the

capacity of the me suring device.

NP = Non Plastic iaterial

---

i

1

, 1

i

1

-I

TOPs.,

Texas Dtlshore Port Syslem

SOIL BORINGS

CORES

1-4

GALVESTON AREA BLOCKS 362, 363 & 380

1.

INTRODUCTION:

Fugro Chance Inc. (CHANCE)

was contracted by Fugro-McClelland Marine Geosciences,

Inc.

to position the UB

"Petite"

for soil borings and to perform pre-well site investigations in

Galveston Area, Blocks 362, 363 and 380, Offshore Texas.

2.

REQUIREMENTS:

Positioning requirements were transmitted,

via e-mail, to Mr. Tony Parker of

CHANCE

by Mr.

Frank Ortiz of Fugro-McClelland Marine Geosciences, Inc. "Survey Request" forms dated

July

10, 2008 e-mailed to Mr. Manuel Lopez of Enterprise Field Services, L.L.C., confirmed

these requirements. Copies of these forms were also e-mailed to

Mr. Frank Ortiz.

Requirements were as follows:

A)

Proposed Locations

The Texas South Central Zone Coordinates are:

CORE 1- BLOCK 363

Y

=

327,915.88'

X

= 3,204,371.92'

CORE 3 - BLOCK 380

Y

=

322,163.06'

X

=

3,208,819.93'

CORE 2 - BLOCK 362

Y

=

325,019.26'

X

= 3,206,611.55'

CORE 4 - BLOCK 380

Y

=

319,372.40'

X

= 3,210,977.64'

B)

Utilize scanning Sonar to perform site investigations.

3.

CHANCE PERSONNEL:

4.

Party Chief

-

P. Arceneaux

Surveyor

- W. Straton

EQUIPMENT AND METHOD:

A)

Primary Positioning System - STARFIX" Satellite

Positioning System

Continuous dynamic positioning through the use of Navstar GPS with differential

signals from multiple reference stations corrected for ionospheric

and tropospheric

effects transmitted via the STARFIX" equatorial geosynchronous satellite.

---

1

Page 2

B)

Secondary Positioning System - Differential Global

Positioning System (DGPS)

DGPS utilizes the Navstar Satellite Constellation with data from selected reference

sites transmitted via

LF radio-link for enhanced accuracy through differential

techniques.

C)

STARFIX.NAV®

STARFIX.NAV® is an

on board computer graphic system interfaced to the primary

positioning system capable of displaying

real time position of a vessel in relation to

known hazards, fairways, proposed location, etc.

DRONE® units when used

on

+-...,--j--------~anchor_handling-vessels-lJtilize-f)ifferential-ePs-transmittedio-the-master-station-vi""a---­

radio telemetry link to display in real time the position of that vessel.

I

1

i

I

!

1

-I

1

, I

D)

E)

Vessel orientation by Sperry SR 50 Mod 1 North Seeking Gyro or a S. G. Brown

Meridian North Seeking Gyro

North seeking Gyro compass. Accuracy:!::

2° after 4 hours initial spin up.

Scanning Sonar

Simrad MS1000 High Resolution Sonar

5.

RESULTS:

Geographic positions are based

on Clarke 1866 Spheroid, North American Datum 1927.

Grid coordinates are based on Texas South Central Zone Lambert, NAD 27.

Field operations were conducted from July

14, 2008 to July 18, 2008 with the following

results:

A)

STARFIX'" positions derived by averaging readings over a one hour period at

an

update rate of 750 ms. per reading.

CORE 1- BLOCK 363

Y

=

327,917.01'

X =

3,204,379.15'

Latitude:

28° 40' 55.185" N

Longitude: 95° 14' 35.344" W

This location being 3197.01' FSL and 2136.66' FEL

of Block 363, Galveston Area

CORE 2 - BLOCK 362

Y

=

325,015.26'

X =

3,206,625.03'

Latitude:

28° 40' 25.753" N

Longitude: 95° 14' 11.189" W

This location being 295.26' FSL and 109.22' FWL of Block 362, Galveston Area

---

I J

:l

I J

I

I

CORE 3 - BLOCK 380

Y

=

322,164.00'

X

=

3,208,821.22'

Latitude:

28° 39' 56.835" N

Longitude: 95° 13' 47.578" W

Page 3

This location being 2556.00' FNL and 2305.41'

FWL of Block 380, Galveston Area

CORE 4 - BLOCK 380

319,368.63

X

=

3,210,976.70'

Latitude:

28° 39' 28.482" N

Longitude: 95° 13' 24.406" W

This location being 5351.37' FNL and 4460.89'

FWL of Block 380, Galveston Area

6.

CONFIRMATION:

7.

8.

DGPS was used for confirmation.

The results were as follows:

CORE 1 - BLOCK 363

Y

=

327,917'

X

= 3,204,379'

CORE 3 - BLOCK 380

Y

=

322,164'

X

= 3,208,821'

HSE INCIDENTS:

No incidents.

CHRONOLOGY:

July 14, 2008

CORE 2 - BLOCK 362

Y

=

325,015'

X

= 3,206,625'

CORE 4 - BLOCK 380

Y

=

319,369'

X

= 3,210,977'

0700 Arrived at Lafayette office to pick up

job packet and equipment, departing for Pelican

Island; start time for job

1300 Arrived at dock; mobing

UB "Petite"

1600 Mob complete; standing by to depart for proposed location

1830

En route to location GA. 363

2400

En route to location continues

---

I

July 15, 2008

0001

En route to location GA. 363

1230 Arrived at location; deploying Sonar 200' from proposed Core

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