2015-2016_AVS_Final_Subsurface_Investigation_BUD.pdf

Subsurface Investigation and Geotechnical

Laboratory Testing Results

Charleston Harbor Post 45 Preconstruction

Engineering and Design

Beneficial Use of Disposal Material

Charleston County, South Carolina

JUNE 2016

Presented to

BY

www.americanvibracore.com * 1215 Wallace Drive, Delray Beach, Fl 33444 * Ph 561-372-0500

July 8, 2016

U.S. Army Corps of Engineers Attn: Mr. Mitchell Hall, P.G.

Chief, Geotechnical & Environmental Remediation Section, 69 Darlington Avenue Wilmington, NC 28403-1343

RE: Subsurface Investigation and Geotechnical Laboratory Testing Results

Charleston Harbor Post 45 Preconstruction Engineering and Design Beneficial Use of Disposal Material Charleston County, South Carolina

American Vibracore Services, Inc. is pleased to submit this report regarding the completion of the vibracore field work and lab analysis phases of this project.

Overview

American Vibracore Services, Inc. (AVS) under contract from the U.S. Army Corps of Engineers, Wilmington District, conducted vibracore sampling and wash probe operations for this project.

The field work was conducted in the Lower Reaches and Entrance Channel of Charleston Harbor, Charleston, South Carolina from May 13th through May 15th, 2016. A total of 29 vibracores were collected to within 20 feet of locations designated by USACE, Wilmington District.

A total of 30 wash probes were completed in the outer 7-miles of the Charleston Harbor entrance channel including the 3-mile extension. The cores were analyzed per USACE project guidelines, and a report of the findings is listed herein.

http://www.americanvibracore.com/ www.americanvibracore.com * 1215 Wallace Drive, Delray Beach, Fl 33444 * Ph 561-372-0500

Vibracore and Washprobe Program

AVS utilized the vessel MV Thunderforce as a work platform for vibracore and washprobe operations. AVS’s large pneumatic vibracore machine was used to extract vibracore samples to a depth of 20 feet or until refusal as defined by penetration less than 0.1 feet per 10 second interval was encountered. Core locations were surveyed utilizing Real Time Kinematic (RTK) Global Positioning System (GPS) to accuracies within 0.2 feet both vertically and horizontally by McKim and Creed Inc. surveyors located in Wilmington, North Carolina. Core locations can be viewed in site maps prepared for individual reach’s and are listed in the following report under Appendix A, Figures 1-3.

Washprobes were completed by retrofitting the existing pneumatic vibracore unit with a neckdown flange to accommodate the specified 2” diameter washprobe pipe. Using already established jetting procedures, washprobes were advanced through the sea floor surface to minimum termination elevations of -60 feet below Mean Lower Low Water (MLLW). No washprobe refusal was encountered during the jetting program and all washprobe locations are depicted on the site map contained in Appendix A as Figure 4.

Core Processing and Laboratory Testing

All cores collected from the project were transported to AVS’s laboratory facility, where they were split, logged, sampled, and preserved. Laboratory testing was conducted in the form of American Society for Testing and Materials (ASTM) D422 grain size analysis and hydrometer testing, ASTM D2487 soils classification for engineering purposes, and visual limestone and shell content analysis for designated sieve sizes. Additionally, the cores were photographed and compiled into mosaic log sheets as a visual supplement to the core logs.

All stratigraphic horizons are reported relative to MLLW elevations.

Grain size analysis was conducted utilizing the following sieve sizes: ¾ in, ½ in, 3/8 in, No.

4, No, 10, No. 20, No. 40, No. 60, No. 100, and No. 200, and all fines passing the No. 200 sieve were subjected to hydrometer testing. In total, 87 gradational samples were collected for analysis and 23 archive samples were collected as indicated by the USACE and will be delivered to the USACE, Wilmington District to allow for additional testing should it be required at a later date.

www.americanvibracore.com * 1215 Wallace Drive, Delray Beach, Fl 33444 * Ph 561-372-0500

Reporting

This final report includes the vibracore logs in gINT formatting, core photographic mosaic logs, tabulated washprobe sounding data, penetrometer records, maps of coring/washprobe locations, and lab data with gradation tables and curves for each sample tested. Incremental deliveries of preliminary data were submitted to the USACE for review throughout the duration of the study. All recommendations provided from preliminary submittals have been included in the final deliverable.

This report serves as a compilation of all findings in the Subsurface Investigation and Geotechnical Laboratory Testing Results, Charleston Harbor, Post-45 Preconstruction Engineering and Design, Beneficial Use of Disposal Material, Charleston County, SC study.

The information contained herein meets or exceeds requirements established by the USACE which was agreed upon by AVS and reflects work completed to the most current standards and procedures unless otherwise requested.

In addition, AVS is dedicated to safe work practices and is pleased to report that all work related to this project was completed with zero reportable incidents.

Closing

We appreciate the opportunity to be of service to the U.S. Army Corps of Engineers on this project and look forward to a continued relationship.

Respectfully Submitted, Frederick G Kaub P.G.

Registered Geologist # 1344

MAP FIGURES

!<WLRW 15-03

WLRW 15-02

WLRW 15-01

Figure 1: Wando Reach

³ 0 0.25 0.5 0.75 1

Miles

Map document prepared by American Vibracore Services

Legend !< Vibracores

Core Location Northing Easting MLLW

WLRW 15-01 361935.44 2337041.46 -40.1

WLRW 15-02 360660.86 2335850.89 -38.7

WLRW 15-03 359759.09 2334918.73 -47.0

!<REBR 15-07

REBR 15-06

REBR 15-05

REBR 15-04

REBR 15-03

REBR 15-02

REBR 15-01

BENR 15-11

BENR 15-10

BENR 15-09BENR 15-08

BENR 15-07

BENR 15-06

BENR 15-05

BENR 15-03

BENR 15-02 BENR 15-01

BENR 15-04

Figure 2: Bennis & Rebellion Reach

³ 0 0.25 0.5 0.75 1

Miles

Map document prepared by American Vibracore Services

Legend !< Vibracores

Core Location Northing Easting MLLW

BENR 15-01 345780.19 2337827.44 -47.2

BENR 15-02 345528.88 2337686.13 -49.4

BENR 15-03 345417.12 2338582.33 -47.2

BENR 15-04 345185.41 2338428.3 -48.6

BENR 15-05 344971.138 2338330.439 -49.4

BENR 15-06 345331.57 2337583.08 -47.1

BENR 15-07 344601.41 2339676.27 -50.4

BENR 15-08 344375.34 2339483.76 -50.5

BENR 15-09 344439.934 2340480.165 -49.5

BENR 15-10 343938.505 2340667.498 -48.8

BENR 15-11 343788.643 2341557.589 -49.6

REBR 15-01 342919.635 2342571.013 -51.8

REBR 15-02 342668.084 2342526.368 -51.6

REBR 15-05 341548.462 2344747.445 -49.1

REBR 15-06 341216.366 2344795.49 -48.8

REBR 15-07 340877.419 2344869.211 -47.6

CHEC 15-08CHEC 15-07

CHEC 15-06CHEC 15-05CHEC 15-04CHEC 15-03

CHEC 15-02CHEC 15-01

Figure 3: Charleston Harbor Entrance Channel

³ 0 0.25 0.5 0.75 1

Miles

Map document prepared by American Vibracore Services

Core Location Northing Easting MLLW

CHEC 15-01 329609.68 2358596.87 -50.4

CHEC 15-02 329204.12 2359336.95 -50.8

CHEC 15-03 328986.33 2360383.96 -52.1

CHEC 15-04 328465.53 2360666.96 -53.3

CHEC 15-05 327962.27 2361533.49 -53.7

CHEC 15-06 327347.86 2361994.44 -53.0

CHEC 15-07 327363.46 2362701.17 -53.5

CHEC 15-08 326846.21 2363645.97 -48.5

Legend !< Vibracores

WP-15-30

WP-15-29

WP-15-28

WP-15-27

WP-15-26WP-15-25

WP-15-24

WP-15-23WP-15-22

WP-15-21

WP-15-20WP-15-19

WP-15-18

WP-15-17WP-15-16

WP-15-15

WP-15-14

WP-15-13

WP-15-12

WP-15-11

WP-15-10

WP-15-09

WP-15-08

WP-15-07

WP-15-06

WP-15-05WP-15-04

WP-15-03WP-15-02

WP-15-01

Figure 4: Charleston Harbor Washprobes

³ 0 0.5 1 1.5 2

Miles

Map document prepared by American Vibracore Services

Legend !? Washprobes

Core Location Northing Easting

Bo tto m Ele vat ion

Pe ne tra tio n De pth Be low

Bo tto m Co mp let ion

Ele vat ion

WP-15-01 296421 2418562 -53 8.1 -61.1

WP-15-02 294504 2422231 -53 9.1 -62.1

WP-15-03 294731 2422854 -51 13.1 -64.1

WP-15-04 293078 2424867 -50 10.9 -60.9

WP-15-05 293495 2425215 -51 13.3 -64.3

WP-15-06 292351 2425851 -50 10.4 -60.4

WP-15-07 292918 2426506 -47 13.2 -60.2

WP-15-08 291598 2428894 -49 12.4 -61.4

WP-15-09 290696 2429014 -53 12.7 -65.7

WP-15-10 290176 2430058 -51 10.7 -61.7

WP-15-11 290251 2431063 -52 11.2 -63.2

WP-15-12 289708 2431732 -50 10.9 -60.9

WP-15-13 288561 2434329 -55 14.7 -69.7

WP-15-14 287920 2434969 -51 10.6 -61.6

WP-15-15 286235 2437215 -55 13.1 -68.1

WP-15-16 286755 2437577 -56 8.5 -64.5

WP-15-17 286436 2438156 -54 10.0 -64.0

WP-15-18 286157 2438617 -51 12.2 -63.2

WP-15-19 285524 2438421 -52 10.8 -62.8

WP-15-20 285475 2439740 -51 14.1 -65.1

WP-15-21 282577 2443671 -52 11.2 -63.2

WP-15-22 282914 2443949 -54 11.0 -65.0

WP-15-23 283203 2444248 -55 10.1 -65.1

WP-15-24 281456 2445951 -55 12.1 -67.1

WP-15-25 281716 2446317 -55 11.2 -66.2

WP-15-26 281962 2446585 -55 12.0 -67.0

WP-15-27 281012 2446712 -53 8.0 -61.0

WP-15-28 281332 2447056 -54 8.4 -62.4

WP-15-29 279577 2449463 -55 11.2 -66.2

WP-15-30 279894 2450018 -55 11.0 -66.0

VIBRACORE DRILLING LOGS

-47.2

-48.2

-49.8

-52.2

-57.7

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 10.5' Ran: 10.5' Rec: 5.0'

COMPLETION NOTE: Terminated hole at refusal depth of 10.5' below depth ocean bottom.

OCEAN BOTTOM AT -47.2' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 345780.19 E 2337827.44

5/13/16 @ 1007 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-01

0.0' TO -47.2' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

10.5'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/22/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

Taber Consultants

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-47.2' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1003 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

10.5'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-01

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-01

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 10.5'

Recovery 47.6%

SP: (2.5y 7/1), light gray, poorly graded sand, fine to medium -grained.

SP: (2.5y 7/1), light gray, poorly graded sand, fine to medium -grained, with shells, trace rock fragments.

SP: (10yr 6/1), gray, poorly graded sand, medium to coarse -grained, trace shells.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 10.5 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 0 2.8 0

S-2 SP 1.5 4.4 1.2

S-3 SP 1.6 3.6 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

1.0'

2.6'

5.0'

0.0'

1.0'

2.6'

S-1

S-2

S-3

-49.4

-51.4

-53.1

-61.9

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 12.5' Ran: 12.5' Rec: 13.0'

(12.5-13) Vibracore sampling in excess of penetration depth. Possible causes are;

pre-drive vibracore sampler settlement, overdrive, excessive hydraulic infill of surrounding material from bit vibration, or localized particle dispersion within sampler.

COMPLETION NOTE: Terminated hole at refusal depth of 12.5' below depth ocean bottom.

OCEAN BOTTOM AT -49.4' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 345528.88 E 2337686.13

5/13/16 @ 1026 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-02

0.0' TO -49.4' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

12.5'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/22/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-49.4' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1021 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

12.5'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-02

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-02

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 12.5'

Recovery 104.0%

SP: (10r 7/1), light gray, poorly graded sand, fine to medium -grained, trace shell fragments.

SP: (5y 5/1), gray , poorly graded sand, fine to medium -grained, with shells, and, shell hash.

SP-SM: (5y 7/1), light gray , poorly graded sand with silt, fine -grained, trace shell fragments.

BOTTOM OF BOREHOLE AT 12.5 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 0.3 4.2 0.1

S-2 SP 2.1 2.1 0

S-3 SP-SM 1 6.5 0.6

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

2.0'

3.7'

13.0'

0.0'

2.0'

3.7'

S-1

-47.2

-49.2

-51.3

-53.2

-57.0

-58.2

-63.5

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 16.3' Ran: 16.3' Rec: 11.0'

COMPLETION NOTE: Terminated hole at refusal depth of 16.3' below depth ocean bottom.

OCEAN BOTTOM AT -47.2' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 345417.12 E 2338582.33

5/13/16 @ 1106 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-03

0.0' TO -47.2' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

16.3'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-47.2' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1102 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

16.3'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-03

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-03

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 16.3'

Recovery 67.5%

SP-SM: (5y 6/2), light olive gray , poorly graded sand with silt, fine -grained.

SM: (5y 3/1), very dark gray , silty sand, fine -grained, with organic staining.

SP-SM: (5y 7/1), light gray , poorly graded sand with silt, fine -grained.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained, trace shell fragments.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained, with shell fragments, and rock fragments.

Assumed Not Recovered

BOTTOM OF BOREHOLE AT 16.3 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP-SM 0 7.7 0

S-2 SM 0 40.1 0

S-3 SP-SM 0 10.5 0

S-4 SP 0.5 0.7 0

S-5 SP 8.1 1.6 5.5

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

2.0'

4.1'

6.0'

9.8'

11.0'

0.0'

2.0'

4.1'

6.0'

9.8'

S-1

S-2

S-3

S-4

S-5

-48.6

-52.5

-55.6

-57.5

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 8.9' Ran: 8.9' Rec: 7.0'

COMPLETION NOTE: Terminated hole at refusal depth of 8.9' below depth ocean bottom.

OCEAN BOTTOM AT -48.6' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 344971.138 E 2338330.439

5/13/16 @ 1122 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-04

0.0' TO -48.6' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

8.9'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-48.6' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1118 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

8.9'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-04

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-04

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 8.9'

Recovery 78.7%

SP: (5y 7/1), light gray , poorly graded sand, fine to medium -grained, trace rock fragments, trace shell fragments.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained, trace rock fragments.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 8.9 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 0.1 3.4 0.2

S-2 SP 0 1.7 0.5

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

3.9'

7.0'

0.0'

3.9'

S-1

-51.6

-58.2 -58.4

-59.9

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 10.5' Ran: 10.5' Rec: 9.0'

COMPLETION NOTE: Terminated hole at refusal depth of 10.5' below depth ocean bottom.

OCEAN BOTTOM AT -49.4' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 345331.57 E 2337583.08

5/13/16 @ 1247 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-05

0.0' TO -49.4' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

10.5'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-49.4' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1244 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

10.5'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-05

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-05

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 10.5'

Recovery 85.7%

SP-SM: (5y 7/1), light gray , poorly graded sand with silt, fine to medium -grained.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained, trace rock fragments.

SP-SM: (2.5y 7/1), light gray, poorly graded sand with silt, medium to coarse -grained, trace shell fragments, trace rock fragments.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 10.5 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP-SM 0 8.8 0

S-2 SP 0 3.3 0

S-3 SP-SM 3 6 1

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

2.2'

8.8' 9.0'

0.0'

2.2'

8.8'

S-1

-47.1

-48.4

-50.7

-53.1

-62.8

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 15.7' Ran: 15.7' Rec: 16.0'

(15.7-16) Vibracore sampling in excess of penetration depth. Possible causes are;

pre-drive vibracore sampler settlement, overdrive, excessive hydraulic infill of surrounding material from bit vibration, or localized particle dispersion within sampler.

COMPLETION NOTE: Terminated hole at refusal depth of 15.7' below depth ocean bottom.

OCEAN BOTTOM AT -47.1' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 345185.41 E 2338428.3

5/13/16 @ 1046 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-06

0.0' TO -47.1' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

15.7'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-47.1' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1040 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

15.7'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-06

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-06

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 15.7'

Recovery 101.9%

SP: (2.5y 7/1), light gray, poorly graded sand, trace shell fragments.

SP-SM: (10yr 6/1), gray, poorly graded sand with silt, trace shell fragments.

SM: (2.5y 7/1), light gray, silty sand.

CL: (2.5y 7/1), light gray, lean clay.

BOTTOM OF BOREHOLE AT 15.7 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 3 5.4 0

S-2 SP-SM 0 8.4 0

S-3 SM 6 14.4 0

S-4 CL 0.3 80.5 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

1.3'

3.6'

6.0'

16.0'

0.0'

1.3'

3.6'

6.0'

S-1

S-2

-50.4

-55.6

-56.5

-59.0

-60.4

-61.2

-65.4

-66.9

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 16.5' Ran: 16.5' Rec: 15.0'

COMPLETION NOTE: Terminated hole at refusal depth of 16.5' below depth ocean bottom.

OCEAN BOTTOM AT -50.4' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 344601.41 E 2339676.27

5/13/16 @ 1327 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-07

0.0' TO -50.4' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

16.5'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-50.4' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1324 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

16.5'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-07

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-07

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 16.5'

Recovery 90.9%

SP: (2.5y 7/1), light gray, poorly graded sand, fine to medium -grained.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained, with rock fragments, trace shell fragments.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained.

SP-SM: (5y 7/1), light gray , poorly graded sand with silt, fine -grained, with silt strata or lenses.

SP: (5y 6/1), gray / light olive gray, poorly graded sand, medium to coarse -grained, with rock fragments, trace shell fragments.

SP: (2.5y 6/1), gray, poorly graded sand, medium to coarse -grained, trace shell fragments, shell hash.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 16.5 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 0 1.7 0

S-2 SP 4.1 1.3 27

S-3 SP 0 1.4 0

S-4 SP-SM 0 16 0

S-5 SP 3 2.5 20

S-6 SP 2.1 1.2 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

5.2'

6.1'

8.6'

10.0'

10.8'

15.0'

0.0'

5.2'

6.1'

8.6'

10.0'

10.8'

S-1

S-2

S-3

S-4

S-6

-50.5

-53.5

-54.1

-57.4

-58.1 -58.4 -58.9

-64.5

-65.5

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 15.0' Ran: 15.0' Rec: 14.0'

COMPLETION NOTE: Terminated hole at refusal depth of 15.0' below depth ocean bottom.

OCEAN BOTTOM AT -50.5' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 344439.934 E 2340480.165

5/13/16 @ 1305 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-08

0.0' TO -50.5' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

15.0'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-50.5' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1302 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

15'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-08

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-08

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 15.0'

Recovery 93.3%

SP: (2.5y 7/1), light gray, poorly graded sand, trace clay, trace shell fragments.

SP-SM: (2.5y 6/1), gray, poorly graded sand with silt.

SP: (2.5y 7/1), light gray, poorly graded sand, medium to coarse -grained.

SP-SM: (2.5y 7/1), light gray, poorly graded sand with silt, medium to coarse -grained, with clay.

SC: (5y 7/1), light gray , clayey sand, with sand.

SW-SC: (2.5y 7/1), light gray, well graded sand with clay, with shell fragments, shell hash.

SP-SM: (2.5y 5/1), gray, poorly graded sand with silt, with shell fragments, some clay, shell hash.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 15.0 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP-SM 0.2 5.4 0

S-2 SP 0 3.9 0

S-3 SP 0 2.7 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

3.6'

4.6'

5.6'

0.0'

3.6'

4.6'

S-1

-49.5

-51.8

-53.4

-55.2

-56.2

-58.2

-60.3 -60.5

-65.9

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 16.4' Ran: 16.4' Rec: 11.0'

COMPLETION NOTE: Terminated hole at refusal depth of 16.4' below depth ocean bottom.

OCEAN BOTTOM AT -49.5' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 344375.34 E 2339483.76

5/13/16 @ 1511 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-09

0.0' TO -49.5' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

16.4'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-49.5' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/13/16 @ 1505 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

16.4'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-09

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-09

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 16.4'

Recovery 67.1%

SP-SM: (10yr 3/1), very dark gray, (2.5yr 4/1) dark reddish gray, poorly graded sand with silt, trace shell fragments.

SP-SM: (2.5y 6/1), gray, poorly graded sand with silt, with clay strata or lenses.

SP: (5y 7/1), light gray , poorly graded sand, with clayey sand strata or lenses.

SM: (5y 3/1), very dark gray , silty sand, with sand strata or lenses, trace shell fragments.

CL: (2.5y 6/1), gray, lean clay, with clay strata or lenses.

SP-SC: (5y 5/1), gray , poorly graded sand with clay.

SP-SC: (5y 6/2), light olive gray , poorly graded sand with clay, with shell fragments.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 16.4 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP-SM 0.8 5.7 0

S-2 SP-SM 0 8.7 0

S-3 SP 0 2.4 0

S-4 SM 0.4 14.3 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

2.3'

3.3'

4.9'

6.7'

0.0'

2.3'

3.9'

5.7'

S-1

S-2

-48.8 -49.5

-51.1 -51.2

-52.6

-53.8 -54.0

-55.7

-58.2 -58.5

-62.6

-63.8 -64.1

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 15.3' Ran: 15.3' Rec: 15.0'

COMPLETION NOTE: Terminated hole at refusal depth of 15.3' below depth ocean bottom.

OCEAN BOTTOM AT -48.8' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 343938.505 E 2340667.498

5/14/16 @ 0752 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-10

0.0' TO -48.8' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

15.3'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-48.8' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/14/16 @ 0750 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

15.3'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-10

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-10

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 15.3'

Recovery 98.0%

SP: (5y 7/1), light gray , poorly graded sand, with rock fragments.

SP-SM: (5y 5/1), gray , poorly graded sand.

SP: (2.5y 7/1), light gray, poorly graded sand.

SP-SM: (5y 5/1), gray , poorly graded sand with silt, with clay strata or lenses.

SP-SM: (5y 6/1), gray / light olive gray, poorly graded sand with silt, with clay strata or lenses.

CL: (5y 6/1), gray / light olive gray, sandy lean clay.

SP-SM: (5y 8/1), white / yellowish gray, poorly graded sand with silt, with clay strata or lenses.

CL: (2.5y 3/1), very dark gray, sandy lean clay.

SP: (5y 5/1), gray , poorly graded sand with silt.

SP-SM: (2.5y 3/1), very dark gray, poorly graded sand, clay nodules @10.7'.

SP-SM: (5y 7/1), light gray , poorly graded sand with silt, with clay strata or lenses.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 15.3 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 0.9 3.1 10

S-2 SP-SM 0.1 8.1 0

S-3 SP-SM 0 5.2 0

S-4 SP-SC 0 9.1 0

S-5 SP-SM 0 16.7 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

1.0'

2.4'

3.4'

6.0'

7.0'

0.0'

1.4'

2.4'

3.8'

6.0'

S-1

S-2

S-3

-49.6

-51.1

-51.7

-56.0

-57.9

-58.5

-63.5

-65.6 -66.1

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 16.5' Ran: 16.5' Rec: 16.0'

COMPLETION NOTE: Terminated hole at refusal depth of 16.5' below depth ocean bottom.

OCEAN BOTTOM AT -49.6' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 343788.643 E 2341557.589

5/14/16 @ 0809 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

BENR 15-11

0.0' TO -49.6' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

16.5'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-49.6' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/14/16 @ 0806 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

16.5'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationBENR 15-11

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation BENR 15-11

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 16.5'

Recovery 97.0%

SP: (5y 6/1), gray / light olive gray, poorly graded sand, sandy trace rock fragments, few shell fragments.

SP: (5y 7/1), light gray , grades to pale olive, poorly graded sand, trace rock fragments, trace clay strata or lenses.

SP-SM: (5y 5/1), gray , poorly graded sand with silt, with clay strata or lenses.

SC: (5y 3/1), very dark gray , (5y 7/1) light gray , clayey sand, with sand strata or lenses.

SP: (5y 7/1), light gray , poorly graded sand with silt.

SP-SM: (5y 5/1), gray , (5y 6/1) gray / light olive gray, poorly graded sand with silt, sandy with clayey sand strata or lenses, trace shell fragments.

SC: (2.5y 3/1), very dark gray, clayey sand, and shell fragments, very fine shell hash.

Assumed Not Recovered.

BOTTOM OF BOREHOLE AT 16.5 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SP 7.2 4.7 1.5

S-2 SP 0 4.1 0.9

S-3 SP-SM 0 6.4 0

S-4 SP-SM 0 14.8 0

S-5 SC 0 30.8 0

S-6 SC 0 31.5 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

1.5'

2.1'

3.1'

6.4'

6.9'

8.3'

0.0'

1.5'

2.1'

5.4'

6.4'

6.9'

S-1

S-2

S-3

S-4

S-6

-50.4

-55.9

-60.4

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 10.0' Ran: 10.0' Rec: 11.6'

(10-11.6) Vibracore sampling in excess of penetration depth. Possible causes are;

pre-drive vibracore sampler settlement, overdrive, excessive hydraulic infill of surrounding material from bit vibration, or localized particle dispersion within sampler.

COMPLETION NOTE: Terminated hole at refusal depth of 10' below depth ocean bottom.

OCEAN BOTTOM AT -50.4' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 329609.679 E 2358596.867

5/14/16 @ 1403 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

CHEC-15-01

0.0' TO -50.4' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

10.0'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-50.4' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/14/16 @ 1358 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

10'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationCHEC-15-01

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation CHEC-15-01

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 10.0'

Recovery 116.0%

SM: (2.5y 3/3), dark olive brown, silty sand.

SC: (2.5y 3/3), dark olive brown, clayey sand, trace shell fragments.

BOTTOM OF BOREHOLE AT 10.0 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SM 0 23.6 0

S-2 SC 1.5 40.7 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

5.5'

7.6'

0.0'

5.5'

-50.8

-56.8

-61.4

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 10.6' Ran: 10.6' Rec: 11.0'

(10.6-11.3) Vibracore sampling in excess of penetration depth. Possible causes are;

pre-drive vibracore sampler settlement, overdrive, excessive hydraulic infill of surrounding material from bit vibration, or localized particle dispersion within sampler.

COMPLETION NOTE: Terminated hole at refusal depth of 10.6' below depth ocean bottom.

OCEAN BOTTOM AT -50.8' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 329204.119 E 2359336.947

5/14/16 @ 1345 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

CHEC-15-02

0.0' TO -50.8' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

10.6'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-50.8' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/14/16 @ 1341 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

10.6'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationCHEC-15-02

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation CHEC-15-02

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 10.6'

Recovery 103.8%

SM: (2.5y 3/3), dark olive brown, poorly graded sand with silt, clayey.

CL: (2.5y 3/3), dark olive brown, lean clay, sandy.

BOTTOM OF BOREHOLE AT 10.6 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SM 0 27.3 0

S-2 CL 0 59.9 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

6.0'

7.2'

0.0'

6.0'

-52.1

-53.0

-57.6

-62.2

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 10.1' Ran: 10.1' Rec: 11.0'

(10.1-11) Vibracore sampling in excess of penetration depth. Possible causes are;

pre-drive vibracore sampler settlement, overdrive, excessive hydraulic infill of surrounding material from bit vibration, or localized particle dispersion within sampler.

COMPLETION NOTE: Terminated hole at refusal depth of 9.6' below depth ocean bottom.

OCEAN BOTTOM AT -52.1' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 328986.327 E 2360383.958

5/14/16 @ 1323 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

CHEC-15-03

0.0' TO -52.1' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

10.1'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16. ELEVATION TOP OF BORING

COMPLETED

12. TOTAL SAMPLES

N/A

DEG FROM

VERTICAL

DIVISION

Date Drafted:6/17/2016 Reviewed By: FK

14. ELEVATION GROUND WATER

9. COORDINATE SYSTEM

10. SIZE AND TYPE OF BIT

See Remarks

1. PROJECT

NAD83

6. THICKNESS OF OVERBURDEN

7. DEPTH DRILLED INTO ROCK

8. TOTAL DEPTH OF BORING

South Atlantic Division

American Vibracore Services

OF

AVS Pneumatic

INSTALLATION

INCLINED

HORIZONTAL

15. DATE TIME GROUP

OF BORING

Drafted By: Fred Kaub

4" Bit & Hydraulic Vibracore S/B

BEARING

-52.1' MLLW

2. HOLE NUMBER

13. TOTAL NUMBER CORE BOXES

5/14/16 @ 1319 hrs.

Charleston, SC

Brian McCord

Finn Whiting, Geologist

VERTICAL

18. SIGNATURE AND TITLE OF INSPECTOR

9.6'

0.0'

VERTICAL

UNDISTURBED

DRILLING LOG

Boring DesignationCHEC-15-03

DEPTH

(feet) b

0.0

2.0

4.0

6.0

8.0

10.0

LEGEND

c

SHEET 1 of 1

Wilmington District Geotechnical Section

Boring Designation CHEC-15-03

SAW FORM 1836-A (VIBRACORE BORING)

JUNE 2016

ELEV

(MLLW)

a

REMARKS

(Drilling time, water loss, depth of weathering, etc., if significant) g

% CORE

REC

e

Core Run 10.1'

Recovery 108.9%

SM: (2.5y 3/3), dark olive brown, (2.5y 3/1) very dark gray mottled with, poorly graded sand with silt, fine -grained, clayey trace shell fragments.

SM: poorly graded sand with silt, clayey with clay strata or lenses.

CL: lean clay, sandy.

BOTTOM OF BOREHOLE AT 10.1 ft

SOILS ARE FIELD VISUALLY CLASSIFIED IN

ACCORDANCE WITH THE UNIFIED SOIL

CLASSIFICATION SYSTEM

LAB CLASSIFICATION

Sample Lab |------- % Content -------| ID Class. Shell #200 Fines Limestone

S-1 SM 0 34.6 0

S-2 SM 0 29.4 0

NOTE: Soils are Visually Lab Classified in Accordance with ASTM-D2487. Percent Passing #200 Sieve and Percent Shell are Determined in Accordance with ASTM-D6913.

FIELD CLASSIFICATION OF MATERIALS

(Description) d

BOX OR

SAMPLE #

f

0.9'

5.9'

0.0'

0.9'

-53.3

-58.0

-67.9

NOTE 1: Ocean Bottom elevation is referenced to MLLW using verified tidal data from RTK survey determinations.

NOTE 2: Top of vibracore is logged as being at "Ocean Bottom". When Run is greater than Recovery, the difference is depicted as "Assumed Not Recovered".

VIBRACORE BORING

From: 0.0' to 14.6' Ran: 14.6' Rec: 14.6'

COMPLETION NOTE: Terminated hole at refusal depth of 14.6' below depth ocean bottom.

OCEAN BOTTOM AT -53.3' MLLW

State Plane - SC NAD83

5. DIRECTION OF BORING

SHEETS

4. NAME OF DRILLER

3. DRILLING AGENCY

N 328465.53 E 2360666.962

5/14/16 @ 1306 hrs.

11. MANUFACTURER'S DESIGNATION OF DRILL

SHEET

VERSION: Final

CHEC-15-04

0.0' TO -53.3' WATER

17. TOTAL CORE RECOVERY FOR BORING

DISTURBED

STARTED

Date Checked:7/22/2016

MLLW

LOCATION COORDINATES

14.6'

Charleston Harbor Lower Reaches & Entrance Channel Charleston, South Carolina

16…