J_Geotechnical Subsurface Data.pdf

Date: December 28, 2021

Scale: As Shown

Drawn: Google Earth

DWG. No. JDH-10/21/194-B

Boring Location Plan – Water Borings

Wallops Flight Facility Causeway Bridge

Wallops Island, Virginia

J OHN D. H YNES & A SSOCIATES, INC .

32185 Beaver Run Drive • Salisbury, Maryland 21804

410-546-6462 / Fax: 410-548-5346

N

Drawn: Google Earth

DWG. No. JDH-10/21/194-C

Boring Location Plan – Water Borings

Wallops Flight Facility Causeway Bridge

Wallops Island, Virginia

J OHN D. H YNES & A SSOCIATES, INC .

32185 Beaver Run Drive • Salisbury, Maryland 21804

Drawn: Google Earth

DWG. No. JDH-10/21/194-D

Boring Location Plan – Water Borings

Wallops Flight Facility Causeway Bridge

Wallops Island, Virginia

J OHN D. H YNES & A SSOCIATES, INC .

32185 Beaver Run Drive • Salisbury, Maryland 21804

0.0

3.0

6.0

9.0

11.0

14.0

16.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 5.8 Light brown, fine to medium POORLY-GRADED SAND, trace silt and gravel, medium dense to loose, wet SP

6.0 / -0.2 Pale Brown, fine to medium POORLY-GRADED SAND, trace silt and gravel, loose to very loose, saturated SP

11.0 / -5.2 Pale Brown, fine to medium POORLY-GRADED SAND, trace silt and gravel, loose, saturated SP

16.0 / -10.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, loose to very loose, saturated SP-SM

27.0 / -21.2 Gray, fine to medium SILTY SAND, trace clay and gravel, very loose, saturated SM

32.0 / -26.2 Gray, silty LEAN CLAY, trace sand, soft, saturated, (PEAT Layer ~3 inches) CL

37.0 / -31.2 Gray, fine to medium SILTY SAND, trace clay, loose, saturated

SM

42.0 / -36.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, medium dense, saturated SP-SM

47.0 / -41.2 Gray, clayey SILT WITH SAND, medium stiff, saturated ML

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DATE(S) DRILLED:6/22/21 - 6/22/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 5.8 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.853973 LONG: -75.4924744

NORTH: EAST:

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

LOCATION: Wallops Island, Virginia DRILLING COMPANY: John D. Hynes & Associates, Inc.

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -46.2 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

57.0 / -51.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay, medium dense, saturated SP-SM

67.0 / -61.2 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

70.0 / -64.2 Gray, silty FAT CLAY, trace sand, very stiff, saturated CH

72.0 / -66.2 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

77.0 / -71.2 Gray, clayey SILT WITH SAND, stiff, saturated ML

82.0 / -76.2 Gray, SILTY CLAY, trace sand, stiff to hard, saturated CL-ML

92.0 / -86.2 Gray, clayey SILT, trace sand, hard, saturated ML

100.5 / -94.7 Boring Terminated

35.938 13

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DATE(S) DRILLED:6/22/21 - 6/22/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 5.8 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.853973 LONG: -75.4924744

NORTH: EAST:

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

50/3"

50/5"

0.0

3.0

6.0

9.0

11.0

14.0

16.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 3.0 Light brown, fine to medium POORLY-GRADED SAND, trace silt, medium dense, wet SP

6.0 / -3.0 Brown, clayey SILT WITH SAND, stiff, saturated ML

8.0 / -5.0 Brown, fine to medium SILTY SAND, medium dense, saturated

SM

9.0 / -6.0 Brown, fine to coarse POORLY-GRADED SAND WITH SILT, medium dense, saturated SP-SM

14.0 / -11.0 Gray and brown, fine to medium SILTY SAND, very loose, saturated SM

16.0 / -13.0 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay, very loose, saturated SP-SM

22.0 / -19.0 Gray, fine to medium SILTY SAND, trace clay, loose, saturated

SM

27.0 / -24.0 Gray, fine to medium SILTY SAND, trace clay, loose, saturated

SM

32.0 / -29.0 Gray, fine to medium POORLY-GRADED SAND, trace silt and clay, loose, saturated SP

42.0 / -39.0 Gray, fine to coarse POORLY-GRADED SAND WITH SILT, trace clay and gravel, very dense, saturated SP-SM

47.0 / -44.0 Gray, fine to medium POORLY-GRADED SAND, trace silt, very dense, saturated SP

52.0 / -49.0 Gray, fine SILTY SAND, trace clay, very dense, saturated SM

29.3

19.0

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DATE(S) DRILLED:6/23/21 - 6/24/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 3.0 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8538707 LONG: -75.4923115

NORTH: EAST:

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

67.0 / -64.0 Gray, silty LEAN CLAY, trace sand, hard, saturated CL

72.0 / -69.0 Gray, SILTY CLAY, trace sand, very stiff, saturated CL-ML

77.0 / -74.0 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

82.0 / -79.0 Gray, clayey SILT, trace sand, very stiff, saturated ML

87.0 / -84.0 Gray, silty LEAN CLAY, trace sand, stiff to very stiff, saturated

CL

100.5 / -97.5 Boring Terminated

31.1

39.943 17

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DATE(S) DRILLED:6/23/21 - 6/24/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 3.0 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8538707 LONG: -75.4923115

NORTH: EAST:

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

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12.0

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17.0

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24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 3.7 Brown, fine to medium POORLY-GRADED SAND, trace silt, loose, wet SP

3.0 / 0.7 Brown, fine to medium SILTY SAND, trace clay, medium dense, wet SM

6.0 / -2.3 Brown, fine to medium POORLY-GRADED SAND WITH SILT, trace clay and gravel, very loose, saturated SP-SM

9.0 / -5.3 Brown, fine to medium POORLY-GRADED SAND, trace silt and gravel, very loose, saturated SP

12.0 / -8.3 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay and gravel, loose, saturated SP-SM

14.0 / -10.3 Gray, fine to medium SILTY SAND, trace clay and gravel, very loose, saturated SM

17.0 / -13.3 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

24.0 / -20.3 Gray, SILTY CLAY, very soft, saturated CL-ML

29.0 / -25.3 Gray, fine to coarse POORLY-GRADED SAND, trace silt and gravel, loose, saturated SP

32.0 / -28.3 Gray, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, loose, saturated SP

37.0 / -33.3 Gray, fine to coarse SILTY SAND, trace gravel and clay, medium dense, saturated SM

47.0 / -43.3 Gray, fine to medium SILTY SAND, trace clay and gravel, medium dense, saturated SM

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DATE(S) DRILLED:6/29/21 - 6/30/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 3.7 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8537651 LONG: -75.492152

NORTH: EAST:

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

Shelby

Tube

54.0

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64.0

69.0

70.5

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -48.3 Gray, fine to medium SILTY SAND, trace clay, medium dense to very dense, saturated SM

62.0 / -58.3 Gray, fine to medium SILTY SAND, trace clay and gravel, medium dense, saturated SM

67.0 / -63.3 Gray, clayey SILT, trace sand, medium stiff, saturated, Shelby Tube from 70.5 to 73.0 feet ML

77.0 / -73.3 Gray, SILTY CLAY, trace sand, soft, saturated CL-ML

82.0 / -78.3 Gray, SILTY CLAY, trace sand and gravel, soft to hard, saturated CL-ML

100.5 / -96.8 Boring Terminated

45.5

26.9

43 12

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DATE(S) DRILLED:6/29/21 - 6/30/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 3.7 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8537651 LONG: -75.492152

NORTH: EAST:

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

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11.0

14.0

16.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 7.9 Brown, clayey SILT, trace sand, soft ML

1.5 / 6.4 Brown, fine to medium SILTY SAND, trace clay, loose SM

2.0 / 5.9 Brown, fine to medium POORLY-GRADED SAND WITH SILT, very loose SP-SM

9.0 / -1.1 Gray, fine to medium POORLY-GRADED SAND, trace silt, loose SP

22.0 / -14.1 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay, medium dense SP-SM

27.0 / -19.1 Gray, fine to medium SILTY SAND, trace clay, medium dense to loose SM

37.0 / -29.1 Gray, fine to medium POORLY-GRADED SAND WITH GRAVEL, trace silt, medium dense SP

42.0 / -34.1 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay, medium dense to dense SP-SM

22.9

22.1

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DATE(S) DRILLED:6/24/21 - 6/24/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.9 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8536562 LONG: -75.4919961

NORTH: EAST:

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

62.0 / -54.1 Gray, clayey SILT WITH SAND, stiff ML

67.0 / -59.1 Gray, fine to medium SILTY SAND, trace clay and gravel, medium dense SM

72.0 / -64.1 Gray, clayey SILT WITH SAND, stiff ML

77.0 / -69.1 Gray, clayey SILT, very stiff ML

82.0 / -74.1 Gray, clayey ELASTIC SILT, trace sand, stiff MH

92.0 / -84.1 Gray, clayey SILT, trace sand, very stiff ML

100.5 / -92.6 Boring Terminated

66.8

25.8

67 30

R M

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MATERIAL DESCRIPTION OF STRATA

L-04

REMARKS:

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-55

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-65

-70

-75

-80

-85

-90

3 FEET

DATE(S) DRILLED:6/24/21 - 6/24/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.9 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8536562 LONG: -75.4919961

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

16.5

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 5.2 Brown, fine to coarse POORLY-GRADED SAND, trace gravel and silt, very loose to loose, wet to saturated SP

8.0 / -2.8 Brown, fine to coarse POORLY-GRADED SAND, trace silt, very loose, saturated SP

12.0 / -6.8 Brown and gray, fine to coarse POORLY-GRADED SAND, trace gravel and silt, very loose to medium dense, saturated SP

16.0 / -10.8 Brown and gray, fine to coarse POORLY-GRADED SAND WITH SILT AND GRAVEL, very loose to medium dense, saturated, (trace organic debris) SP-SM

32.0 / -26.8 Brown and gray, fine to coarse POORLY-GRADED SAND WITH SILT AND GRAVEL, very loose, saturated, (trace organic debris) SP-SM

37.0 / -31.8 Brown and gray, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, medium dense, saturated, (trace organic debris) SP

14.8

R M

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MATERIAL DESCRIPTION OF STRATA

L-05

REMARKS:

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-5

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-25

-30

-35

-40

-45

4.5 FEET

DATE(S) DRILLED:7/7/21 - 7/7/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Hynes LOGGER: R. Rhoads SURFACE ELEVATION: 5.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.853544 LONG: -75.4918433

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -46.8 Brown and gray, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, medium dense, saturated SP

67.0 / -61.8 Gray, clayey ELASTIC SILT WITH SAND, very stiff, saturated

MH

72.0 / -66.8 Gray, fine to medium SILTY SAND, trace clay, very stiff, saturated SM

77.0 / -71.8 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

82.0 / -76.8 Gray, SILTY CLAY, trace sand, very stiff, saturated CL-ML

100.5 / -95.3 Boring Terminated

20.2

35.6

R M

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MATERIAL DESCRIPTION OF STRATA

L-05

REMARKS:

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-65

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-75

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-90

-95

4.5 FEET

DATE(S) DRILLED:7/7/21 - 7/7/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Hynes LOGGER: R. Rhoads SURFACE ELEVATION: 5.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.853544 LONG: -75.4918433

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 8.3 Brown, fine to medium POORLY-GRADED SAND, trace silt, very loose, wet SP

3.0 / 5.3 Brown, fine to medium POORLY-GRADED SAND WITH SILT, trace gravel, loose to very loose, saturated SP-SM

9.0 / -0.7 Brown, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, very loose, saturated SP

12.0 / -3.7 Brown, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, loose to very loose, saturated SP

17.0 / -8.7 Gray, fine to medium SILTY SAND, trace clay and gravel, very loose, saturated SM

19.0 / -10.7 Gray, fine to medium POORLY-GRADED SAND WITH SILT, very loose, saturated SP-SM

24.0 / -15.7 Gray, fine to medium SILTY SAND, trace gravel, very loose to dense, saturated SM

42.0 / -33.7 Gray, fine to coarse POORLY-GRADED SAND, trace silt and gravel, dense, saturated SP

16.5

17.6

R M

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MATERIAL DESCRIPTION OF STRATA

L-06

REMARKS:

R O

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-25

-30

-35

-40

-45

3 FEET

DATE(S) DRILLED:6/30/21 - 7/1/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 8.3 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8534326 LONG: -75.4916907

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -43.7 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

62.0 / -53.7 Gray, SILTY CLAY, trace sand, very stiff, saturated CL-ML

67.0 / -58.7 Gray, clayey SILT WITH SAND, very stiff, saturated ML

77.0 / -68.7 Gray, clayey ELASTIC SILT, trace sand, medium stiff, saturated MH

100.5 / -92.2 Boring Terminated

29.0

42.653 23

R M

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MATERIAL DESCRIPTION OF STRATA

L-06

REMARKS:

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L-06

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-55

-60

-65

-70

-75

-80

-85

-90

3 FEET

DATE(S) DRILLED:6/30/21 - 7/1/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 8.3 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8534326 LONG: -75.4916907

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 6.5 Brown, fine to medium POORLY-GRADED SAND, trace silt, very loose, wet SP

3.0 / 3.5 Brown, fine to coarse POORLY-GRADED SAND, trace silt and gravel, medium dense, wet SP

6.0 / 0.5 Gray, fine to coarse POORLY-GRADED SAND WITH GRAVEL, trace silt, loose, saturated SP

9.0 / -2.5 Gray, SILTY CLAY, trace sand, very soft, saturated CL-ML

12.0 / -5.5 Gray, fine to medium POORLY-GRADED SAND, trace silt and gravel, very loose, saturated SP

17.0 / -10.5 Gray, fine to coarse POORLY-GRADED SAND WITH SILT, trace gravel, very loose, saturated SP-SM

19.0 / -12.5 Gray, fine to medium SILTY SAND, trace clay and gravel, very loose, saturated SM

27.0 / -20.5 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

32.0 / -25.5 Gray, SILTY CLAY, trace sand, very soft, saturated CL-ML

42.0 / -35.5 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

47.0 / -40.5 Brown, clayey SILT, stiff, saturated ML

22.9

22.330 7

R M

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MATERIAL DESCRIPTION OF STRATA

L-07

REMARKS:

R O

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-5

-10

-15

-20

-25

-30

-35

-40

-45

6 FEET

DATE(S) DRILLED:7/6/21 - 7/6/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 6.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8509153 LONG: -75.4882583

NORTH: EAST:

S P

T L

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H Y

N E

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -45.5 Gray, fine to medium SILTY SAND, trace clay, dense to medium dense, saturated SM

72.0 / -65.5 Gray, clayey ELASTIC SILT, trace sand, soft to very stiff, saturated MH

100.5 / -94.0 Boring Terminated

27.8

48.857 26

R M

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MATERIAL DESCRIPTION OF STRATA

L-07

REMARKS:

R O

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6 FEET

DATE(S) DRILLED:7/6/21 - 7/6/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 6.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8509153 LONG: -75.4882583

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 8.2 Brown, fine to medium POORLY-GRADED SAND, trace silt, very loose, wet SP

3.0 / 5.2 Brown, clayey SILT WITH SAND, very soft, wet ML

6.0 / 2.2 Brown, fine to coarse POORLY-GRADED SAND, trace silt and gravel, very loose, saturated SP

9.0 / -0.8 Gray, fine to coarse POORLY-GRADED SAND, trace silt and gravel, loose to very loose, saturated SP

19.0 / -10.8 Gray, fine to medium POORLY-GRADED SAND, trace silt, very loose, saturated SP

22.0 / -13.8 Gray, silty LEAN CLAY, very soft to soft, saturated CL

37.0 / -28.8 Gray, SILTY CLAY, trace sand, very soft to very stiff, saturated

CL-ML

47.0 / -38.8 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

33.829 9

R M

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MATERIAL DESCRIPTION OF STRATA

L-08

REMARKS:

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-10

-15

-20

-25

-30

-35

-40

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6 FEET

DATE(S) DRILLED:7/1/21 - 7/6/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 8.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8508034 LONG: -75.4881058

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

57.0 / -48.8 Gray, clayey SILT WITH SAND, very stiff, saturated ML

62.0 / -53.8 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace clay, very loose, saturated SP-SM

67.0 / -58.8 Gray, clayey SILT WITH SAND, very stiff, saturated ML

72.0 / -63.8 Gray, SILTY CLAY, trace sand, medium stiff to stiff, saturated

CL-ML

82.0 / -73.8 Gray, SILTY CLAY, trace sand, stiff to very stiff, saturated, (some seashell fragments) CL-ML

87.0 / -78.8 Gray, clayey SILT, trace sand, very stiff, saturated ML

100.5 / -92.3 Boring Terminated

27.3

29.0

30.939 13

R M

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MATERIAL DESCRIPTION OF STRATA

L-08

REMARKS:

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6 FEET

DATE(S) DRILLED:7/1/21 - 7/6/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 8.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8508034 LONG: -75.4881058

NORTH: EAST:

S P

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H Y

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

11.0

13.5

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 7.4 Brown, fine to medium POORLY-GRADED SAND, trace silt, loose, wet SP

3.0 / 4.4 Brown, fine to coarse POORLY-GRADED SAND, trace silt and gravel, medium dense, wet SP

6.0 / 1.4 Brown, fine to coarse POORLY-GRADED SAND, trace silt and gravel, loose to very loose, saturated SP

11.0 / -3.6 Brown, clayey SILT WITH SAND, trace gravel, medium stiff, saturated ML

13.5 / -6.1 Brown and gray, fine to coarse POORLY-GRADED SAND, trace silt and gravel, very loose, saturated SP

17.0 / -9.6 Brown, fine to coarse SILTY SAND, trace clay and gravel, loose, saturated SM

19.0 / -11.6 Brown and gray, fine to coarse POORLY-GRADED SAND WITH SILT, trace gravel, very loose, saturated SP-SM

29.0 / -21.6 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

42.0 / -34.6 Gray, clayey SILT WITH SAND, medium stiff, saturated ML

47.0 / -39.6 Gray, clayey SILT, trace sand, very stiff, saturated ML

31.1

25.9

R M

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MATERIAL DESCRIPTION OF STRATA

L-09

REMARKS:

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6 FEET

DATE(S) DRILLED:7/1/21 - 7/1/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.4 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8506913 LONG: -75.4879535

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -44.6 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

57.0 / -49.6 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

62.0 / -54.6 Gray, fine to medium SILTY SAND, trace clay, dense to loose, saturated SM

77.0 / -69.6 Gray, clayey SILT, trace sand, stiff, saturated ML

87.0 / -79.6 Gray, SILTY CLAY, very stiff, saturated CL-ML

92.0 / -84.6 Gray, SILTY CLAY, trace sand, contains seashells, very stiff, saturated CL-ML

97.0 / -89.6 Gray, SILTY CLAY, very stiff, saturated CL-ML

100.5 / -93.1 Boring Terminated

28.6

44.348 18

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MATERIAL DESCRIPTION OF STRATA

L-09

REMARKS:

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6 FEET

DATE(S) DRILLED:7/1/21 - 7/1/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G3230

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.4 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8506913 LONG: -75.4879535

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 7.2 Brown, clayey SILT, trace sand and organic silt, medium stiff, wet ML

1.5 / 5.7 Brown, fine to medium POORLY-GRADED SAND, trace silt, loose, wet SP

3.0 / 4.2 Brown, fine to medium POORLY-GRADED SAND, trace silt, medium dense, saturated SP

6.0 / 1.2 Brown, fine to medium POORLY-GRADED SAND, trace silt, very loose to loose, saturated SP

12.0 / -4.8 Brown, fine to medium POORLY-GRADED SAND, trace silt and gravel, loose to very loose, saturated SP

19.0 / -11.8 Brown, fine to medium POORLY-GRADED SAND WITH SILT, very loose, saturated SP-SM

27.0 / -19.8 Gray, silty FAT CLAY, trace sand, soft, saturated CH

32.0 / -24.8 Gray, clayey SILT WITH SAND, medium stiff, saturated ML

37.0 / -29.8 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

42.0 / -34.8 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

52.0 / -44.8 Gray, clayey SILT WITH SAND, very stiff, saturated ML

18.1

19.6

R M

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MATERIAL DESCRIPTION OF STRATA

L-10

REMARKS:

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6 FEET

DATE(S) DRILLED:6/24/21 - 6/25/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8505765 LONG: -75.4878044

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

50/2"

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

57.0 / -49.8 Gray, fine to medium SILTY SAND, trace clay, dense to very dense, saturated SM

72.0 / -64.8 Gray, SILTY CLAY, medium stiff, saturated CL-ML

82.0 / -74.8 Gray, silty LEAN CLAY, trace sand, contains seashell fragments, stiff, saturated CL

87.0 / -79.8 Gray, silty LEAN CLAY, trace sand, very stiff, saturated CL

97.0 / -89.8 Gray, silty LEAN CLAY, trace sand, very stiff, saturated CL

100.5 / -93.3 Boring Terminated

45.7

25.7

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MATERIAL DESCRIPTION OF STRATA

L-10

REMARKS:

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6 FEET

DATE(S) DRILLED:6/24/21 - 6/25/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: M. Hynes LOGGER: E. Cross SURFACE ELEVATION: 7.2 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8505765 LONG: -75.4878044

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 6.8 Brown, fine to medium SILTY SAND, loose, wet SM

1.5 / 5.3 Brown, clayey SILT WITH SAND, medium stiff, wet ML

3.0 / 3.8 Light brown and brown, fine to medium POORLY-GRADED SAND WITH SILT, very loose, saturated SP-SM

5.0 / 1.8 Brown, fine to medium SILTY SAND, very loose, wet SM

6.0 / 0.8 Light brown, fine to medium POORLY-GRADED SAND, trace silt, loose, saturated SP

9.0 / -2.2 Gray, fine to medium POORLY-GRADED SAND, trace silt, loose to very loose, saturated SP

17.0 / -10.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, very loose, saturated SP-SM

22.0 / -15.2 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

27.0 / -20.2 Gray, clayey SILT WITH SAND, medium stiff, saturated ML

32.0 / -25.2 Gray, SILTY CLAY, trace sand, soft, saturated CL-ML

37.0 / -30.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, loose, saturated SP-SM

42.0 / -35.2 Gray, fine to medium POORLY-GRADED SAND WITH SILT, trace gravel, very loose to medium dense, saturated SP-SM

25.8

19.2

R M

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MATERIAL DESCRIPTION OF STRATA

L-11

REMARKS:

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6 FEET

DATE(S) DRILLED:6/25/21 - 6/28/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 6.8 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8504586 LONG: -75.4876594

NORTH: EAST:

S P

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

52.0 / -45.2 Gray, fine to medium SILTY SAND, trace clay, very dense to dense, saturated SM

67.0 / -60.2 Gray, clayey SILT, medium stiff, saturated ML

72.0 / -65.2 Gray, clayey SILT, stiff to very stiff, saturated ML

100.5 / -93.7 Boring Terminated

47.7

38.3

R M

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MATERIAL DESCRIPTION OF STRATA

L-11

REMARKS:

R O

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6 FEET

DATE(S) DRILLED:6/25/21 - 6/28/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: G7822

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: 6.8 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.8504586 LONG: -75.4876594

NORTH: EAST:

S P

T L

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

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PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

0.0

3.0

6.0

9.0

12.0

14.0

17.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / 3.5 Light brown, fine to medium POORLY-GRADED SAND, trace silt, medium dense, wet SP

6.0 / -2.5 Light brown, fine to coarse POORLY-GRADED SAND, trace silt, medium dense, saturated SP

9.0 / -5.5 Light brown, fine to medium POORLY-GRADED SAND, loose, saturated SP

12.0 / -8.5 Brown, fine to coarse POORLY-GRADED SAND, trace silt and gravel, very loose, saturated SP

14.0 / -10.5 Gray, fine to medium POORLY-GRADED SAND, trace silt, very loose, saturated SP

17.0 / -13.5 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

19.0 / -15.5 Gray, fine to medium SILTY SAND, trace clay, very loose, saturated SM

27.0 / -23.5 Gray, fine to coarse SILTY SAND, trace clay, very loose to loose, saturated SM

37.0 / -33.5 Gray, fine to medium SILTY SAND, trace clay and gravel, loose, saturated SM

42.0 / -38.5 Gray, fine to medium POORLY-GRADED SAND WITH SILT, medium dense, saturated SP-SM

47.0 / -43.5 Gray, fine to coarse POORLY-GRADED SAND WITH SILT AND GRAVEL, medium dense, saturated SP-SM

52.0 / -48.5 Gray, fine to medium SILTY SAND, dense, saturated SM

22.2

23.9

R M

R

G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

L-12

REMARKS:

R O

C K

Q U

A

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T Y

D E

S

IG

N A

T

IO

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S P

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W

C O

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E C

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E R

Y

S A

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FIELD DATA

E

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V A

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F T

D E

P T

H

F T

L-12

S A

M P

LE

IN

T E

R V

A L

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

6 FEET

DATE(S) DRILLED:6/28/21 - 6/29/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 3.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.850338 LONG: -75.487518

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

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\A R

C H

IV

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D A

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\S A

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B U

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\2

1\

JD

H -1

0-

-1

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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LAB DATA

PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

57.0 / -53.5 Gray, fine to medium SILTY SAND, trace clay, medium dense, saturated SM

62.0 / -58.5 Gray, clayey SILT WITH SAND, hard, saturated ML

67.0 / -63.5 Gray, silty LEAN CLAY, medium stiff, saturated CL

77.0 / -73.5 Gray, silty LEAN CLAY, trace sand, very stiff, saturated CL

100.5 / -97.0 Boring Terminated

43.5

41.9

R M

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G E

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LO

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S T

R A

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MATERIAL DESCRIPTION OF STRATA

L-12

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

T B

LO

W

C O

U N

T S

R

E C

O V

E R

Y

S A

M P

LE

L

E G

E N

D

G R

A P

H

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L O

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FIELD DATA

E

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V A

T

IO

N

F T

D E

P T

H

F T

L-12

S A

M P

LE

IN

T E

R V

A L

-55

-60

-65

-70

-75

-80

-85

-90

-95

6 FEET

DATE(S) DRILLED:6/28/21 - 6/29/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Walters LOGGER: E. Cross SURFACE ELEVATION: 3.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.850338 LONG: -75.487518

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

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-M A

C H

IN

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\A R

C H

IV

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D A

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\S A

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\2

1\

JD

H -1

0-

-1

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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LAB DATA

PI

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PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

WOH

WOH

WOH

WOH

WOH

WOH

WOH

2/18"

2/18"

0.0

3.0

6.0

9.0

11.5

14.0

16.5

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / -1.6 Dark gray, clayey ELASTIC SILT, very soft, saturated, (organic silt) MH

11.0 / -12.6 Dark gray, clayey SILT, contains PEAT, very soft, saturated, (organic silt) ML

22.0 / -23.6 Dark gray, clayey SILT, very soft, saturated, (trace shell fragments, organic silt) ML

27.0 / -28.6 Dark gray, clayey SILT WITH SAND, very soft, saturated, (trace shell fragments, organic silt) ML

32.0 / -33.6 Dark gray, clayey SILT, contains PEAT, hard, saturated ML

33.0 / -34.6 Dark gray, clayey SILT, hard, saturated, (trace shell fragments)

ML

33.5 / -35.1 Dark gray, fine to coarse SILTY SAND WITH GRAVEL, trace clay, dense, saturated SM

37.0 / -38.6 Dark gray, fine to medium SILTY SAND, trace clay, loose, saturated SM

42.0 / -43.6 Dark gray, fine to medium SILTY SAND, dense, saturated, (trace shell fragments) SM

47.0 / -48.6 Dark gray, fine SILTY SAND, trace clay, medium dense, saturated SM

102.269 28

R M

R

G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-1

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

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IO

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S P

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C O

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E C

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S A

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L O

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FIELD DATA

E

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V A

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F T

D E

P T

H

F T

W-1

S A

M P

LE

IN

T E

R V

A L

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

-55

2.6 FEET

DATE(S) DRILLED:10/21/21 - 10/26/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -1.6 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85319 LONG: -75.49121

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

R Y

\2

1\

JD

H -1

0-

-1

W

A

LL

O P

S

IS

LA

N

D C

A U

S E

W A

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1/

/2

Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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U R

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Y

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D E

X

LAB DATA

PI

LI

Q

U

ID

L

IM

IT

LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

105.0

57.0 / -58.6 Dark gray, fine SILTY SAND, trace clay, dense to medium dense, saturated SM

67.0 / -68.6 Dark gray, fine to coarse SILTY SAND, trace clay, medium dense, saturated SM

72.0 / -73.6 Dark gray, fine SILTY SAND, trace clay, medium dense, saturated, (trace shell fragments) SM

77.0 / -78.6 Dark gray, silty LEAN CLAY, very stiff, saturated, (trace shell fragments) CL

92.0 / -93.6 Dark gray, clayey ELASTIC SILT, trace sand, hard, saturated, (trace shell fragments) MH

100.5 / -102.1 Boring Terminated

38.644 18

R M

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G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-1

REMARKS:

R O

C K

Q U

A

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T Y

D E

S

IG

N A

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IO

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S P

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S A

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FIELD DATA

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F T

D E

P T

H

F T

W-1

S A

M P

LE

IN

T E

R V

A L

-60

-65

-70

-75

-80

-85

-90

-95

-100

2.6 FEET

DATE(S) DRILLED:10/21/21 - 10/26/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -1.6 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85319 LONG: -75.49121

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

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D A

T A

\S A

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S

B U

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\2

1\

JD

H -1

0-

-1

W

A

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O P

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IS

LA

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W A

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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LAB DATA

PI

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L

IM

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LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

WOH

WOH

1/18"

WOH

WOH

WOH

WOH

0.0

3.0

6.0

9.0

11.5

14.0

16.5

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / -2.1 Dark gray, SILT, trace clay, very soft, saturated, (organic silt)

ML

5.5 / -7.6 Dark gray, clayey SILT, very soft, saturated, (organic silt) ML

8.5 / -10.6 Dark gray, clayey ELASTIC SILT, very soft, saturated, (organic silt) MH

13.0 / -15.1 Dark gray, clayey ELASTIC SILT, very soft, saturated, (trace organic silt, trace shell fragments) MH

22.0 / -24.1 Dark gray, SILTY CLAY, very soft, saturated, (trace organic silt) CL-ML

27.0 / -29.1 Dark gray, FAT CLAY, trace silt, medium stiff, saturated CH

32.0 / -34.1 Dark gray, LEAN CLAY, trace silt, contains PEAT, soft, saturated CL

37.0 / -39.1 Dark gray, fine SILTY SAND, trace clay, medium dense, saturated SM

42.0 / -44.1 Dark gray, fine SILTY SAND, trace clay, loose to medium dense, saturated SM

52.0 / -54.1 Dark gray, fine SILTY SAND, dense, saturated SM

96.1

45.6

R M

R

G E

O

LO

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IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-2

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

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LO

W

C O

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E C

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S A

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L O

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FIELD DATA

E

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V A

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F T

D E

P T

H

F T

W-2

S A

M P

LE

IN

T E

R V

A L

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

-55

1 FOOT

DATE(S) DRILLED:10/26/21 - 10/26/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -2.1 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85285 LONG: -75.49076

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

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\2

1\

JD

H -1

0-

-1

W

A

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O P

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IS

LA

N

D C

A U

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W A

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1/

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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D E

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LAB DATA

PI

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Q

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L

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LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

104.0

62.0 / -64.1 Dark gray, fine SILTY SAND, trace clay, dense to medium dense, saturated SM

77.0 / -79.1 Dark gray, SILTY CLAY, very stiff CL-ML

82.0 / -84.1 Dark gray, silty LEAN CLAY, very stiff, saturated, (trace shell fragments) CL

105.5 / -107.6 Boring Terminated

46.942 18

R M

R

G E

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LO

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S T

R A

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MATERIAL DESCRIPTION OF STRATA

W-2

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

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C O

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S A

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L O

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FIELD DATA

E

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V A

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N

F T

D E

P T

H

F T

W-2

S A

M P

LE

IN

T E

R V

A L

-60

-65

-70

-75

-80

-85

-90

-95

-100

-105

1 FOOT

DATE(S) DRILLED:10/26/21 - 10/26/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -2.1 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85285 LONG: -75.49076

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

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D A

T A

\S A

LI

S

B U

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\2

1\

JD

H -1

0-

-1

W

A

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O P

S

IS

LA

N

D C

A U

S E

W A

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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LAB DATA

PI

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LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

WOH

WOH

WOH

WOH

0.0

3.0

6.0

9.0

14.0

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / -0.9 Dark gray, SILT, trace clay, very soft, saturated, (organic silt)

ML

5.5 / -6.4 Dark gray, SILT, trace clay, very soft, saturated, (organic silt, PEAT) ML

8.5 / -9.4 Dark gray, SILTY CLAY, very soft, saturated, (trace PEAT)

CL-ML

12.0 / -12.9 Dark gray, SILTY CLAY, very soft, saturated CL-ML

17.0 / -17.9 Dark gray, silty LEAN CLAY, very soft, saturated CL

22.0 / -22.9 Dark gray, FAT CLAY, medium stiff, saturated CH

32.0 / -32.9 Dark gray and blue, silty LEAN CLAY, soft, saturated, (PEAT)

CL

37.0 / -37.9 Dark gray, clayey SILT WITH SAND, very stiff, saturated ML

42.0 / -42.9 Dark gray, fine POORLY-GRADED SAND WITH SILT, medium dense, saturated SP-SM

49.0 / -49.9 Dark gray, fine SILTY SAND, dense, saturated SM

29.037 15

R M

R

G E

O

LO

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IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-3

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

T B

LO

W

C O

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E C

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S A

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L O

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FIELD DATA

E

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F T

D E

P T

H

F T

W-3

S A

M P

LE

IN

T E

R V

A L

-5

-10

-15

-20

-25

-30

-35

-40

-45

-50

3 FEET

DATE(S) DRILLED:10/25/21 - 10/25/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -0.9 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85254 LONG: -75.49033

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

R Y

\2

1\

JD

H -1

0-

-1

W

A

LL

O P

S

IS

LA

N

D C

A U

S E

W A

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P J:

1/

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Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

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D E

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LAB DATA

PI

LI

Q

U

ID

L

IM

IT

LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

57.0 / -57.9 Dark gray, fine SILTY SAND, trace clay, medium dense to dense, saturated SM

67.0 / -67.9 Dark gray, fine SILTY SAND, trace clay, medium dense, saturated SM

72.0 / -72.9 Dark gray, clayey SILT WITH SAND, very stiff, saturated, (little to some sea shell fragments) ML

77.0 / -77.9 Dark gray, silty LEAN CLAY, trace sand, very stiff, saturated, (little sea shell fragments) CL

82.0 / -82.9 Dark gray, silty LEAN CLAY, trace sand, very stiff, saturated, (trace sea shell fragments) CL

95.5 / -96.4 Boring Terminated

36.545 24

R M

R

G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-3

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

T B

LO

W

C O

U N

T S

R

E C

O V

E R

Y

S A

M P

LE

L

E G

E N

D

G R

A P

H

IC

L O

G

FIELD DATA

E

LE

V A

T

IO

N

F T

D E

P T

H

F T

W-3

S A

M P

LE

IN

T E

R V

A L

-60

-65

-70

-75

-80

-85

-90

-95

3 FEET

DATE(S) DRILLED:10/25/21 - 10/25/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -0.9 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85254 LONG: -75.49033

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

R Y

\2

1\

JD

H -1

0-

-1

W

A

LL

O P

S

IS

LA

N

D C

A U

S E

W A

Y B

R

ID

G E

\G

IN

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S .G

P J:

G

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S .G

P J:

1/

/2

Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

IS

T

U R

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Y

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D E

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LAB DATA

PI

LI

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ID

L

IM

IT

LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

WOH

WOH

0.0

3.0

6.0

9.0

11.5

14.0

16.5

19.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / -17.5 Dark gray, silty LEAN CLAY, very soft, (trace shell fragments)

CL

2.5 / -20.0 Dark gray, silty FAT CLAY, very soft, (trace organic silt, trace shell fragments) CH

8.5 / -26.0 Dark gray, silty LEAN CLAY, very soft, (trace organic silt, trace shell fragments) CL

11.0 / -28.5 Dark gray, clayey SILT, stiff, (trace organic silt, trace shell fragments) ML

13.5 / -31.0 Dark gray, LEAN CLAY, trace silt, soft to medium stiff, (trace shell fragments) CL

18.5 / -36.0 Dark gray, LEAN CLAY, contains PEAT, medium stiff CL

22.0 / -39.5 Dark gray, fine to medium SILTY SAND, trace clay, loose SM

27.0 / -44.5 Dark gray, fine SILTY SAND, trace clay, dense SM

32.0 / -49.5 Dark gray, fine SILTY SAND, trace clay, dense SM

37.0 / -54.5 Dark gray, fine SILTY SAND, trace clay, dense SM

47.0 / -64.5 Dark gray, LEAN CLAY, trace silt and sand, very stiff CL

52.0 / -69.5 Dark gray, fine SILTY SAND, trace clay, medium dense SM

24.841 20

R M

R

G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-4

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

T B

LO

W

C O

U N

T S

R

E C

O V

E R

Y

S A

M P

LE

L

E G

E N

D

G R

A P

H

IC

L O

G

FIELD DATA

E

LE

V A

T

IO

N

F T

D E

P T

H

F T

W-4

S A

M P

LE

IN

T E

R V

A L

-20

-25

-30

-35

-40

-45

-50

-55

-60

-65

-70

17 FEET

DATE(S) DRILLED:11/2/21 - 11/2/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -17.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85224 LONG: -75.49009

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

R Y

\2

1\

JD

H -1

0-

-1

W

A

LL

O P

S

IS

LA

N

D C

A U

S E

W A

Y B

R

ID

G E

\G

IN

T L

O G

S .G

P J:

G

IN

T L

O G

S .G

P J:

1/

/2

Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

IS

T

U R

E C

O N

T E

N T

P

LA

S T

IC

IT

Y

IN

D E

X

LAB DATA

PI

LI

Q

U

ID

L

IM

IT

LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

54.0

59.0

64.0

69.0

74.0

79.0

84.0

89.0

94.0

99.0

57.0 / -74.5 Dark gray, silty LEAN CLAY, trace sand, stiff CL

72.0 / -89.5 Dark gray, clayey ELASTIC SILT, trace sand, stiff, (trace shell fragments) MH

82.0 / -99.5 Dark gray, clayey ELASTIC SILT WITH SAND, hard MH

92.0 / -109.5 Dark gray, clayey SILT WITH SAND, hard ML

100.5 / -118.0 Boring Terminated

42.8

29.8

38 15

R M

R

G E

O

LO

G

IC

S T

R A

T A

MATERIAL DESCRIPTION OF STRATA

W-4

REMARKS:

R O

C K

Q U

A

LI

T Y

D E

S

IG

N A

T

IO

N

S P

T B

LO

W

C O

U N

T S

R

E C

O V

E R

Y

S A

M P

LE

L

E G

E N

D

G R

A P

H

IC

L O

G

FIELD DATA

E

LE

V A

T

IO

N

F T

D E

P T

H

F T

W-4

S A

M P

LE

IN

T E

R V

A L

-75

-80

-85

-90

-95

-100

-105

-110

-115

17 FEET

DATE(S) DRILLED:11/2/21 - 11/2/21

DRILLING METHOD(S): HSA DRILLING EQUIPMENT: MB-47

DRILLER: B. Hynes LOGGER: E. Cross SURFACE ELEVATION: -17.5 ft

DATUM: NAVD 88

HORIZONTAL COOR. SYSTEM:

LAT: 37.85224 LONG: -75.49009

NORTH: EAST:

S P

T L

O G

H Y

N E

S

A R

C H

IV

E

-M A

C H

IN

E

\A R

C H

IV

E

D A

T A

\S A

LI

S

B U

R Y

\2

1\

JD

H -1

0-

-1

W

A

LL

O P

S

IS

LA

N

D C

A U

S E

W A

Y B

R

ID

G E

\G

IN

T L

O G

S .G

P J:

G

IN

T L

O G

S .G

P J:

1/

/2

Pepco Holdings An Exelong Company 701 Ninth Street, N.W.

Washington, DC

M O

IS

T

U R

E C

O N

T E

N T

P

LA

S T

IC

IT

Y

IN

D E

X

LAB DATA

PI

LI

Q

U

ID

L

IM

IT

LL

PROJECT NAME: Wallops Flight Facility Causeway Bridge

PROJECT NO.: JDH-10/21/194

WOH

WOH

WOH

WOH

WOH

Shelby

Tube

0.0

3.0

6.0

9.0

11.5

14.0

16.5

19.0

21.0

24.0

29.0

34.0

39.0

44.0

49.0

0.0 / -14.7 Dark gray, silty LEAN CLAY, very soft, (organic silt) CL

2.5 / -17.2 Dark gray, clayey SILT, very soft, (organic silt) ML

8.5 / -23.2 Dark gray, silty LEAN CLAY, very soft, (organic silt) CL

11.0 / -25.7 Dark gray, silty LEAN CLAY, very soft, (trace organic silt) CL

16.0 / -30.7 Dark gray, clayey ELASTIC SILT, very soft to medium stiff MH

19.5 / -34.2 Dark gray, silty LEAN CLAY, medium stiff…