16B04vol2.pdf

Savannah Harbor, Georgia and South Carolina

Solicitation Number

W912HN-16-B-0004

Sediment Basin Tide Gate Removal Volume 2 of 2: Appendices

PN 113006

June 2016

U.S. ARMY ENGINEER DISTRICT, SAVANNAH

CORPS OF ENGINEERS

100 WEST OGLETHORPE AVENUE

SAVANNAH, GEORGIA 31401-3640

US Army Corps of Engineers Savannah District

Sediment Basin Tide Gate Removal 16B04 Savannah Harbor, GA & SC

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 11 00 SUMMARY OF WORK

01 11 00.10 37 SPECIAL CONTRACT REQUIREMENTS

01 32 01.00 10 PROJECT SCHEDULE

01 33 00 SUBMITTAL PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 35 29.13 HEALTH, SAFETY, AND EMERGENCY RESPONSE PROCEDURES FOR

CONTAMINATED SITES

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 10 QUALITY CONTROL

01 45 00.10 10 QUALITY CONTROL SYSTEM (QCS)

01 50 00 TEMPORARY CONSTRUCTION FACILITIES AND CONTROLS

01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS

DIVISION 02 - EXISTING CONDITIONS

02 41 00 DEMOLITION

02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

02 65 00 STORAGE TANKS REMOVAL

02 82 13.00 10 ASBESTOS ABATEMENT

DIVISION 31 - EARTHWORK

31 00 00 EARTHWORK

31 41 16 TEMPORARY METAL SHEET PILING/COFFERDAM

31 62 19 AIDS TO NAVIGATION (ATONs)

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 05 34 MARSH PLANTING

DIVISION 35 - WATERWAY AND MARINE CONSTRUCTION

35 20 23 DREDGING

35 31 19 STONE SHORELINE PROTECTION

APPENDICES

Appendix A TIDEGATE CONDITION SURVEY Appendix B ENVIRONMENTAL STUDIES Appendix C SURVEY MONUMENT DATASHEETS

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 1

Appendix A Tidegate Condition Survey

Tide Gate Site Visit Memorandum for Record

CESAS-EN-H

CESAS-EN-H

November 27, 2015 1

A site visit to the USACE Tide Gate was made on November 20, 2015 by USACE personnel. This MFR was prepared on November 27, 2015 and documents observations made and photographs taken during the site visit.

Sediment Basin Tide Gate AM Friday November 23

Participant: Terry Page, USACE SAS-EN-H

The Georgia side of the tide gate is located on Hutchinson Island. Access to the USACE property is through a residential neighborhood and golf course: The Reserve at Savannah Harbor.

Approximately 10 acres of USACE property is enclosed by chain-link fencing with access through a double gate. The 10 acres is primarily a grass field that is regularly mowed through a maintenance contract.

An old asphalt drive leads through the site to a paved parking area. There are various items that are being stored on the parking area: metal ramps or gangways, metal platforms, rolls of filter fabric, and erosion control blankets. Concrete parking bumpers are along one side of the parking area.

Adjacent to the parking is an old restroom building. Electrical service to the building has been disconnected. There were two restrooms in the building. One still has some plumbing fixtures in place. The plumbing fixtures have been removed from the other side. The restroom used a septic tank and drain field. It is unknown at this time how water was supplied to the building.

West of the restroom and across the access drive is another old building structure. This building is dilapidated and falling down. It is unknown what this building was used for. There is an old electrical box and a possible well connection in the vicinity of this building. It is possible that this is where the restroom got its water.

There are 15 gates from the tide gate structure that are stacked within the fenced in area.

The gates were removed from the structure several years ago. There are two stacks of four gates and two stacks of three gates along the fence line adjacent to the river. There is a single gate in the vicinity of the dilapidated building.

On the Georgia side of the embankment there is a concrete block equipment building. It appears that this building has been unsecured and the doors left open for quite a while. Inside the building are various electrical panels, generator, and mechanical equipment used to operate the gates when they were in place.

CESAS-EN-H

November 27, 2015 2

A doorway from the equipment room leads out to the concrete walkway that goes across the top of the tide gate structure. The structure spans the Back River, with one end in Georgia and the other end in South Carolina. Steel hand rails were installed during the construction of the tide gate. However, the railing is missing in some areas and thin steel cable has been installed instead. Along the walkway there is steel grating in several areas to provide access to the mechanical equipment that operated the gates. Electrical conduit and mechanical piping also runs along the walkway. There several lights installed across the walkway. The walkway goes across the top to the piers that supported the gates. There are concrete stairways and steel hand rails from the walkway that lead down to the top of each pier on the downstream side of the tide gate. This provided access for maintenance of the gate pivots on each pier.

There are no structures associated with the tide gate on the South Carolina side. The concrete tide gate walkway on the South Carolina side ends at a man gate that leads to the earthen embankment. Access to the tide gate from the South Carolina side is by a dirt road off U.S. Hwy

17. The dirt road leads to a gated entry to Georgia Department of Transportation property on Barnwell Island. This property mainly consists of dredge material containment areas. In the vicinity of the tidegate on the South Carolina side there are contractor staging areas for ongoing dredging operations and dike construction/maintenance contracts. There are several electrical poles with primary and secondary power in this area, along with an existing well. There is also contractor field office trailers in the area.

CESAS-EN-H

November 27, 2015 3

Photo 1: Stone monument at entrance. Photo 2: Looking west along fence at entrance gate.

Photo 3: Asphalt paving running north from entrance. Photo 4: Dilapidated building. Abandoned electric box and possible well connection.

Photo 5: Abandoned restroom building Photo 6: Interior of abandoned restroom building

CESAS-EN-H

November 27, 2015 4

Photo 7: Steel gates removed from tide gate and Photo 8: Old asphalt parking with miscellaneous debris stacked on site. There are two stacks of four gates, two stack of three gates, and one single gate.

Photo 9: Miscellaneous debris Photo 10: Miscellaneous debris

Photo 11: Miscellaneous debris Photo 12: Miscellaneous debris

CESAS-EN-H

November 27, 2015 5

Photo 13: Concrete base for abandoned lighting Photo 14: Abandoned utilities pole

Photo 15: Concrete dock and timber dolphin fender piles Photo 16: Concrete dock and timber dolphin fender piles

Photo 17: Timber dolphin fender piles Photo 18: Looking southwest along fence line from gate at concrete dock

CESAS-EN-H

November 27, 2015 6

Photo 19: Earth embankment on Georgia side leading to Photo 20: Lighting tower. Equipment building equipment building and tide gate structure and above ground storage tank in background.

Photo 21: Above ground storage tank. Valve to underground Photo 22: Interior of equipment building tank is visible in front of and to right of palm leaves.

Photo 23: Interior of equipment building Photo 24: Interior of equipment building

CESAS-EN-H

November 27, 2015 7

Photo 25: Exterior of equipment building looking from Photo 26: View from Georgia side across tide gate walkway tide gate walkway towards South Carolina side

Photo 27: Typical electrical and hydraulic boxes along Photo 28: Typical view of downstream side of pier Walkway

Photo 29: Typical view of upstream side of pier Photo 30: Stairs on upstream side of pier

CESAS-EN-H

November 27, 2015 8

Photo 31: Access gate on South Carolina side of tide gate Photo 32: Upstream abutment wall on South Carolina side.

Photo 33: Downstream abutment wall on South Carolina Photo 34: Upstream abutment wall on Georgia side.

Side

Photo 35: Upstream side of tide gate from Georgia side Photo 36: Downstream side of tide gate from Georgia side

CESAS-EN-H

November 27, 2015 9

Photo 37: Existing utilities on South Carolina side of Photo 38: Existing utilities on South Carolina side of embankment embankment.

Appendix B Environmental Studies

Tidegate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers Tidegate South Abutment Environmental Study Savannah District January 2016

Tidegate South Abutment Environmental Study

U.S. Army Corps of Engineers, Savannah District

Executive Summary

The Savannah District conducted investigations and sampling along the south tidegate abutment on Hutchinson Island, Georgia in July, October and November 2015. The samples were collected as part of an investigation to determine potential contaminants that may exist in the soils at the site.

An initial surface soil investigation was conducted on July 22, 2015. Ten samples were collected and tested for RCRA metals, hexavalent chromium, volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), diesel range organics (DROs) and polychlorinated biphenyls (PCBs). Results from sampling detected hexavalent chromium slightly above EPA regulatory standards at one location, adjacent to stacked tidegates. No other analytes were detected at concentrations above regulatory standards. The full report is located in Appendix A.

A second soil investigation was conducted on October 7, 2015 to confirm the presence of hexavalent chromium and determine if the UST had impacted the subsurface. Eleven samples were collected and all were tested for RCRA metals and hexavalent chromium. Two samples, located near the UST, were analyzed for VOCs, SVOCs and DROs. Concentrations of DROs were detected in these samples, however the sampling resolution was insufficient to delineate the boundaries of the affected material. Hexavalent chromium was detected in one location, adjacent to the UST, however the sampling did not replicate the detection of hexavalent chromium above EPA regulatory standards around the former gates. The findings from the confirmatory sampling suggests that the material around the former gates is unaffected by hexavalent chromium. The full report is located in Appendix B.

A third sampling event was conducted on November 12, 2015. Seven samples were collected on the abutment of the tidegate to delineate the boundaries of the plume around the UST and determine if groundwater has been affected. No analytes were detected in the groundwater above regulatory standards and the groundwater has been considered unaffected. Results of sampling around the south tidegate abutment suggests a release from the UST has impacted soil from the pump house to the south, approximately 60 feet and to a depth of 14 feet. It is recommended that approximately 2,334 cubic yards (CY) of affected material be removed and disposed of at an approved landfill. The soil excavation should encompass the northernmost area of the south abutment, south 100 feet and to a depth of 14 feet below the elevation of the ground surface at

Tidegate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers Tidegate South Abutment Environmental Study Savannah District the location of the UST. Rip-rap armor covers the slope of the abutment for a depth of approximately 2.5 feet. Upon removal of the rip-rap along the upstream and downstream slopes, soil should be removed to a depth of 14 feet below the elevation of the ground surface at the location of the UST. The full report is located in Appendix C.

APPENDIX A

TideGate South Abutment Mitigation Analytical Sampling

U.S. Army Corps of Engineers, Savannah District, Environmental & Materials Unit

July 2015

1.0 Introduction

Surface soil samples were collected from the TideGate South Abutment along the Savannah River in Chatham County, Georgia. The samples were collected as part of an investigation to determine potential contaminants that may exist in the surface soils. Sampling was conducted on 22 July 2015. This report discuses the samples, sampling methods, analysis and results.

2.0 Analytical Sampling

2.1 Soil Sampling

Ten soil samples were collected for analysis from the following locations:

1. TG-1-7-15, collected adjacent to eastern most stacked metal gate section

2. TG-2-7-15, collected adjacent to central stacked metal gate section

3. TG-3-7-15, collected adjacent to western most stacked metal gate section

4. TG-Dup-7-15, collected with sample TG-3-7-17

5. TG-4-7-15, collected from open area next to river on western section of property

6. TG-5-7-15, collected from western open area near tree line

7. TG-6-7-15, collected from eastern open area near tree line

8. TG-7-7-15, collected adjacent to fuel storage tank at Pump house

9. TG-Dup2-7-15, collected with sample TG-7-7-15

10. TG-8-7-15, collected adjacent to fuel storage tank at Pump house

Samples TG-1-7-15 through TG-6-7-15 were analyzed for RCRA Metals and Hexavalent Chromium. Samples TG-7-7-15 and TG8-7-15 were analyzed for Volatile Organic Compounds (VOCs), Semi-volatile Organic Compounds (SVOCs), Diesel Range Organics (DROs) and Polychlorinated Biphenyls (PCBs).

Appendix 1 at the end of this report shows soil sampling locations.

Appendix 2 at the end of this report contains the laboratory’s analytical report.

3.0 Methods

3.1 Surface soil samples

Soil samples were collected from depths of 0-1 foot below surface. Samples for Volatile Organic Compounds analysis were collected from undisturbed soil using a modified syringe. The samples were then immediately transferred into preserved containers. The sampling syringes and sample containers were provided by the laboratory. Samples for all other analysis were collected with a dedicated stainless steel spoon, homogenized in a dedicated stainless steel bowl and placed in laboratory provided sample containers. All sample containers were labeled and placed in coolers on ice. Samples were delivered to the laboratory on the day collected.

3.2 Quality Control.

All sampling containers and equipment was pre-cleaned at the laboratory prior to arriving on the sampling site. All equipment was dedicated to only one individual sample. No equipment was re-used between samples eliminating cross contamination of samples.

4.0 Results

4.1 Soil Sample Results

RCRA Metals.

Sample TG-1-7-15 contained Arsenic, Barium, Cadmium, Chromium and Lead above the laboratory’s quantitation limit. Mercury was estimated below the laboratory’s quantitation limit but above their detection limit.

Sample TG-2-7-15 contained Arsenic, Barium, Cadmium, Chromium and Lead above the laboratory’s quantitation limit.

Sample TG-3-7-15 contained Arsenic, Barium, Cadmium, Chromium and Lead above the laboratory’s quantitation limit.

Sample TG-Dup-7-15 contained Barium, Chromium and Lead above the laboratory’s quantitation limit. Arsenic and Cadmium were estimated below the laboratory’s quantitation limit but above their detection limit.

TG-4-7-15 contained Arsenic, Barium, Cadmium, Chromium and Lead above the laboratory’s quantitation limit. Mercury was estimated below the laboratory’s quantitation limit but above their detection limit.

TG-5-7-15 contained Barium, Cadmium, Chromium and Lead above the laboratory’s quantitation limit. Arsenic and Mercury were estimated below the laboratory’s quantitation limit but above their detection limit.

TG-6-7-15 contained Arsenic, Barium, Cadmium, Chromium, Lead and Mercury above the laboratory’s quantitation limit.

Hexavalent Chromium.

Sample TG-6-7-15 was estimated to contain Hexavalent chromium at the laboratory’s detection limit.

Sample TG-2-7-15 contained Hexavalent Chromium above the laboratory’s quantitation limit.

Volatile Organic Compounds.

Sample TG-7-7-15 contained 1,2,3 Trichlorobenzene; 1,2,4 Trichlorobenzene;

Hexachlorobutadiene and Vinyl Acetate at or above the laboratory’s detection limit but below their quantitation limit.

Semi-Volatile Organic Compounds.

Sample TG-7-7-15 contained Benzo[a]pyrne and Bis92-ethylhexyl)phthalate above the laboratory’s detection limit but below their quantitation limit.

Sample TG-Dup2-7-15 contained Bis92-ethylhexyl)phthalate above the laboratory’s quantitation limit. Butyl benzyl phthalate was estimated at the laboratory’s detection limit.

Diesel Range Organics.

Samples TG-7-7-15, TG-8-7-15 and TG-Dup2-7-15 all contained DROs above the laboratory’s quantitation limit.

Polychlorinated Biphenyls. No compounds within this category were detected by the laboratory in any sample.

4.2 Quality Control

One trip blank was submitted for analysis by the laboratory. No compounds were found above the laboratory’s detection limit.

APPENDIX 1

SOIL SAMPLING LOCATIONS

FIGURE 1

FIGURE 2

APPENDIX 2

LABORATORY’S ANALYTICAL REPORT

APPENDIX B

Tide Gate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers Underground Storage Tank Investigation Savannah District October 2015

Tide Gate South Abutment Mitigation Analytical Sampling

U.S. Army Corps of Engineers, Savannah District

1.0 Introduction

The U.S. Army Corps of Engineers, Savannah District conducted soil sampling along the south tide gate abutment on Hutchinson Island, Georgia on October 7th 2015. The samples were collected as part of an investigation to determine potential contaminants that may exist in the soils. This report supplements the findings of the original sampling event conducted in July 2015.

2.0 Analytical Sampling

2.1 Soil Sampling

Soil samples were collected as follows:

1. TG-SS-1, collected from 0-1’ adjacent to the underground storage tank (UST) fill valve south of the pump house.

2. TG-SB-1, collected from 3-4’ in the same location as TG-SS-1.

3. TG-SS-2, collected from 0-1’ adjacent to the access road west of the stacked gates.

4. TG-SS-3, collected from 0-1’ adjacent to the access road at the center of the abutment.

5. TG-SB-3, collected from 5-6’ in the same location as TG-SS-3.

6. TG-SS-4, collected from 0-1’ in the open area 200’ east of the access road and 300’ south from the stacked gates.

7. TG-SS-5, collected from 0-1’ adjacent to the stacked gates west of the access road

8. TG-SB-5, collected from 2-3’ in the same location as TG-SS-5.

9. TG-SS-6, collected from 0-1’ in between stacks of gates on the eastern side of the access road.

10. TG-SB-6, collected from 2-3’ in the same location as TG-SS-6.

11. TG-SS-7, collected from 0-1’ adjacent to the eastern most stacked gates.

All samples were tested for RCRA metals and hexavalent chromium by EPA Method 6010C/7471B. Samples TG-SS-1 and TG-SB-3 were analyzed for Volatile Organic Compounds (VOCs) by EPA Method 8260B, Semi-volatile Organic Compounds (SVOCs) by EPA Method 8270D, and Diesel Range Organics (DROs) by EPA Method 8015C.

Figure 1 of Appendix I, at the end of this report, shows the soil sample locations.

Tide Gate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers

3.0 Methods

3.1 Sample Collection

Surface soil samples were collected using a stainless steel hand auger. Subsurface soil samples were collected using an excavator to reach their desired depths. Samples were homogenized in a stainless steel bowl and placed in laboratory provided containers. Samples were labeled and placed in coolers on ice immediately after collection. Testing was performed by TestAmerica Laboratories, Inc.

3.2 Quality Control

Sampling containers were provided by the laboratory and were clean and unused. All sampling equipment was decontaminated prior to the start of sampling and between each location using a high pressure steam cleaner and phosphate-free detergent.

4.0 Results

4.1 Soil Sampling Results

All sampling results were compared to EPA regional screening levels (RSLs) for resident soils.

A summary table is attached in Appendix II which shows contaminant detections and their respective RSLs. Appendix III, at the end of this report, contains the laboratory’s analytical report.

RCRA Metals.

Barium, cadmium, chromium and lead were detected in all samples at levels below their applicable EPA RSLs.

Mercury was detected in samples TG-SS-1, TG-SB-1, TG-SS-2, TG-SB-3, TG-SS-4, TG-SS-5, TG-SB-5, TG-SS-6 and TG-SB-6. No detections were above the EPA RSL.

Arsenic was detected in all samples at levels above the EPA RSL.

Hexavalent Chromium.

Hexavalent chromium was detected in one sample, TG-SS-1, at a concentration slightly above the EPA RSL.

Tide Gate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers

Volatile Organic Compounds.

Acetone and 2-butanone were detected in both samples tested for VOCs: TG-SB-1 and TG-SB-3.

The detections were below the applicable EPA RSLs.

Semi-Volatile Organic Compounds.

No SVOCs were detected in any of the samples.

Diesel Range Organics.

DROs were detected in both samples tested; TG-SB-1 and TG-SB-3. An EPA RSL does not exist for DROs.

4.2 Quality Control

Duplicate samples were collected in conjunction with TG-SB-1 and TG-SS-6. One trip blank and one equipment blank were submitted for analysis by the laboratory. No constituents were detected in the blanks.

5.0 Discussion

5.1 UST Impacts

Samples TG-SB-1 and TG-SB-3, collected adjacent to the UST located near the pump house on the abutment, detected acetone, 2-butanone and DROs. The EPA generally considers acetone and 2-butanone to be common laboratory contaminants (Asante-Duah, 1996) and are not indicative of actual contamination at the concentrations detected. DROs do not have an EPA RSL however, the Georgia Environmental Protection Division (GAEPD) defines a detection limit of 10 mg/Kg or less for UST release delineation. Sample TG-SB-1 detected DRO at 470 mg/Kg and sample TG-SB-3 detected DRO at 12 mg/Kg which are indicative that the UST has likely released petroleum hydrocarbons to the surrounding soil.

5.2 Arsenic

All samples contained arsenic at levels in exceedance of the EPA RSL however, according to USGS Professional Paper 1270 (1984), the concentrations were within the normal range for regional soils. The detections are not considered significant.

5.3 Hexavalent Chromium

Hexavalent chromium was only detected in one sample during the October 2015 sampling event (TG-SS-1). This sample was located adjacent to the pump house on the abutment and was in

Tide Gate Abutment, Hutchinson Island, Georgia U.S. Army Corps of Engineers exceedance of the EPA RSL. During the previous July 2015 sampling event hexavalent chromium was detected at a level exceeding the EPA RSL in one sample located between the stacked gates on the eastern portion of the site (TG-2-7-15) and was also detected below the EPA RSL in one background sample (TG-6-7-15). Confirmatory samples were collected adjacent to these original July 2015 sampling locations during the October 2015 sampling event; however, hexavalent chromium was not detected again at either location. The findings of both sampling events are shown in Figure 2, Appendix I.

6.0 Recommendations

Soil sampling of the south abutment tide gate suggests a release from the UST has likely occurred and potentially impacted soil from the pump house, to the south, at least 100 feet. A conservative estimate of impacted soil suggests approximately 3,950 CY of material will need to be removed to address this release; however, it is recommended that additional samples be collected around the UST to further delineate the vertical and horizontal extent of the plume.

Full delineation of the plume will enable a more precise estimate of impacted soil and is expected to reduce the total volume that would require special consideration during removal of the abutment. Figure 3, Appendix I outlines the suggested area of excavation estimated using the limited current dataset.

During the July 2015 sampling effort, hexavalent chromium was detected above the EPA RSL;

however, confirmatory sampling did not replicate these results. During the October 2015 sampling, hexavalent chromium was only detected in one location, which was adjacent to the UST. In consideration of these findings, it is recommended that the material around the tide gates be considered unaffected by hexavalent chromium.

7.0 References

Kofi Asante-Duah, 1996, Management of Contaminated Site Problems.

Georgia Environmental Protection Division, 2010, UST Closure Report Guidance Document.

U.S. Geological Survey, 1984, Element Concentrations in Soils and Other Surficial Materials of the Conterminous United States Professional Paper 1270.

APPENDIX I:

FIGURES

0 90 180 270 36045 Feet

Legend !( Surface and Subsurface sample locations

TG-SS-2

TG-SS-4

TG-SS-7

TG-SS/SB-3

TG-SS/SB-1

TG-SS/SB-6

TG-SS/SB-5

ÜU.S. ARMY ENGINEER DISTRICT

CORPS OF ENGINEERS

SAVANNAH, GEORGIA

Tidegate South Abutment Hutchinson Island, Ga October 2015 Soil Sampling Figure 1. Sampling Locations

0 70 140 210 28035

Legend !( Soil Samples July 2015 !( Soil Samples October 2015

TG-5-7-15

TG-6-7-15

TG-2-7-15TG-1-7-15

TG-4-7-15

TG-8-7-15

TG-7-7-15

TG-3-7-15

TG-SS/SB-5

TG-SS-7

TG-SS-4

TG-SS-2

TG-SS/SB-6

TG-SS/SB-1

TG-SS/SB-3

ÜU.S. ARMY ENGINEER DISTRICT

CORPS OF ENGINEERS

SAVANNAH, GEORGIA

Tidegate South Abutment Hutchinson Island, Ga Figure 2.

Hexavalent Chromium Detections

TG-6-7-15

Hexavalent Chromium

0.17 J mg/kg

TG-SS-4

Hexavalent Chromium Non-detect

TG-2-7-15

Hexavalent Chromium

0.40 mg/kg

TG-SS/SB-6

Hexavalent Chromium Non-detect

TG-SS-1

Hexavalent Chromium

0.32 J mg/kg

0 75 150 225 30037.5

Legend !( Surface and Subsurface sample locations

Soil Removal to 10 feet.

TG-SS-2

TG-SS-7

TG-SS/SB-3

TG-SS/SB-1

TG-SS/SB-6

TG-SS/SB-5

ÜU.S. ARMY ENGINEER DISTRICT

CORPS OF ENGINEERS

SAVANNAH, GEORGIA

Tidegate South Abutment Hutchinson Island, Ga Figure 3.

Proposed Soil Removal Around UST

Approximate volume = 3950 CY

TG-SB-1

DRO

470 mg/kg

TG-SB-3

DRO

12 mg/kg

APPENDIX II:

DETECTION SUMMARY TABLE

Detection Summary Tide Gate South Abutment, October 2015

Sample ID: TG-SS-1 TG-SB-1* TG-SS-2 TG-SS-3 TG-SB-3 TG-SS-4 TG-SS-5 TG-SB-5 TG-SS-6 TG-SB-6* TG-SS-7 Depth in feet: 0 - 1 3 - 4 0 - 1 0 - 1 5 - 6 0 - 1 0 - 1 2 - 3 0 - 1 2 - 3 0 - 1

Date Collected: 10/7/15 10/8/15 10/9/15 10/10/15 10/11/15 10/12/15 10/13/15 10/14/15 10/15/15 10/16/15 10/17/15

Acetone NT 25 J NT NT 36 J NT NT NT NT NT NT 6100 2-Butanone NT 4.8 J NT NT 6.3 J NT NT NT NT NT NT 2700

NT ND NT NT ND NT NT NT NT NT NT

Arsenic 2.5 1.9 1.0 J 2.3 2.7 2.7 1.6 J 3.2 1.3 J 2.7 0.83 J 0.68 Barium 11 7.6 3.6 29 7.5 9.2 25 15 19 12 16 1500 Cadmium 2.9 4.1 J 1.4 0.32 J 6.7 5.6 2.1 6.7 0.59 5.4 0.44 J 7.1 Chromium 14 12 4.8 12 17 17 8.3 20 3.9 17 3.6 12000 Lead 8.1 5 1.5 7.3 2.7 11 3.5 5.6 2.1 3.6 1.5 400 Mercury 0.017 J 0.017 J 0.0086 J ND 0.019 J 0.031 0.018 J 0.037 0.0086 J 0.031 ND 0.94

Hexavalent Chromium 0.32 J ND ND ND ND ND ND ND ND ND ND 0.3

Diesel Range Organics NT 470 D NT NT 12 NT NT NT NT NT NT -- Notes:

J = Estimate: The analyte was positively identified; the quanitation is an estimate.

D = The reported value is a dilution.

* = Duplicate sample collected at this location, highest detections reported.

ND = Non detect NT = Not tested

Hexavalent Chromium - 7199 (mg/Kg)

RCRA Metals plus Mercury - 6010C & 7471 B (mg/Kg)

VOCs - 8260B (µg/Kg)

DRO - 8015C (mg/Kg)

EPA Screening Level Resident Soil (mg/Kg)

SVOCs - 8270C (µg/Kg)

APPENDIX III:

LABORATORY ANALYTICAL DATA REPORT

ANALYTICAL REPORT

TestAmerica Laboratories, Inc.

TestAmerica Savannah 5102 LaRoche Avenue Savannah, GA 31404 Tel: (912)354-7858

TestAmerica Job ID: 680-117546-1 Client Project/Site: Savannah Tidegate

For:

U.S. Army Corps of Engineers 100 W. Oglethorpe Ave.

Savannah, Georgia 31401

Attn: John P. Markov

Authorized for release by:

10/23/2015 5:45:58 PM

Bernard Kirkland, Manager of Project Management (912)354-7858 e.3238 bernard.kirkland@testamericainc.com

Designee for

Linda Wolfe, Project Manager II (912)354-7858 e.3005 linda.wolfe@testamericainc.com

The test results in this report meet all 2003 NELAC and 2009 TNI requirements for accredited parameters, exceptions are noted in this report. This report may not be reproduced except in full, and with written approval from the laboratory. For questions please contact the Project Manager at the e-mail address or telephone number listed on this page.

This report has been electronically signed and authorized by the signatory. Electronic signature is intended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory.

https://secure.testamericainc.com/TotalAccess/login.aspx http://www.testamericainc.com/AskTheExpert/Expert_index.htm http://www.testamericainc.com mailto:bernard.kirkland@testamericainc.com mailto:linda.wolfe@testamericainc.com

Table of Contents

Client: U.S. Army Corps of Engineers Project/Site: Savannah Tidegate

TestAmerica Job ID: 680-117546-1

TestAmerica Savannah

10/23/2015

Cover Page

Table of Contents

Case Narrative

Sample Summary

Method Summary

Definitions

Detection Summary

Client Sample Results

QC Sample Results

QC Association

Chronicle

Chain of Custody

Receipt Checklists

Certification Summary

Case Narrative Client: U.S. Army Corps of Engineers TestAmerica Job ID: 680-117546-1 Project/Site: Savannah Tidegate

Job ID: 680-117546-1

Laboratory: TestAmerica Savannah

Narrative

CASE NARRATIVE

Client: U.S. Army Corps of Engineers

Project: Savannah Tidegate

Report Number: 680-117546-1

With the exceptions noted as flags or footnotes, standard analytical protocols were followed in the analysis of the samples and no problems were encountered or anomalies observed. In addition all laboratory quality control samples were within established control limits, with any exceptions noted below. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. In the event of interference or analytes present at high concentrations, samples may be diluted. For diluted samples, the reporting limits are adjusted relative to the dilution required.

RECEIPT

The samples were received on 10/07/2015; the samples arrived in good condition, properly preserved and on ice. The temperatures of the 2 coolers at receipt time were 3.2º C and 3.4º C.

Receipt Exceptions

The following samples were submitted for analysis; however, it was not listed on the Chain-of-Custody: TG-SS-4 (680-117546-15) Per the client the lab is to analyze the samples for metals and hexavalent chromium

The following samples were canceled by the client on 10/8/15 for metals analysis (6010/7471) and hexavalent chromium analysis (7199):

TG-SB-Dup-1 (680-117546-2). Per the client, these analyses are not required for this sample.

VOLATILE ORGANIC COMPOUNDS (GC/MS)

Samples TG-SB-Dup-1 (680-117546-2), TG-SB-1 (680-117546-3) and TG-SB-3 (680-117546-5) were analyzed for Volatile Organic

Compounds (GC/MS) in accordance with EPA SW-846 Method 8260B. The samples were prepared on 10/07/2015 and analyzed on 10/15/2015.

The samples had a reaction with the preservative sodium bisulfate.

The samples were received in pre-weighed containers with a label that was added in the field, which would cause a slight low bias in the final results. All of the samples have extra labels on the containers.

Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with preparation batch

680-404756 and analytical batch 680-405831.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

VOLATILE ORGANIC COMPOUNDS (GC/MS)

Samples TG-Blank-EQB (680-117546-13) and TG-Blank-Trip (680-117546-14) were analyzed for Volatile Organic Compounds (GC/MS) in accordance with EPA SW-846 Method 8260B. The samples were analyzed on 10/08/2015.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

SEMIVOLATILE ORGANIC COMPOUNDS (GC-MS)

Samples TG-SB-Dup-1 (680-117546-2), TG-SB-1 (680-117546-3) and TG-SB-3 (680-117546-5) were analyzed for semivolatile organic compounds (GC-MS) in accordance with EPA SW-846 Method 8270D. The samples were prepared on 10/15/2015 and analyzed on

10/22/2015.

TestAmerica Savannah Page 3 of 75 10/23/2015

Project/Site: Savannah Tidegate

Job ID: 680-117546-1 (Continued)

Laboratory: TestAmerica Savannah (Continued)

2,4-Dinitrophenol and 4,6-Dinitro-2-methylphenol failed the recovery criteria low for LCS 680-405846/19-A. Refer to the QC report for details.

The closing continuing calibration standard (CCVC) recovered outside the method acceptance limits for the following analytes which are not listed as critical compounds of concern: 2,4-Dinitrophenol and 4,6-Dinitro-2-methylphenol. This is obviously a result of matrix interference resulting from the samples associated with prep batch 404805. The data have been qualified and reported.

The following analytes have been identified, in the reference method and/or via historical data, to be poor and/or erratic performers:

2,4-Dinitrophenol. These analytes may have a %D >60% if the average %D of all the analytes in the continuing calibration verification (CCV) is 30%.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

SEMIVOLATILE ORGANIC COMPOUNDS (GC-MS)

Sample TG-Blank-EQB (680-117546-13) was analyzed for semivolatile organic compounds (GC-MS) in accordance with 8270D. The samples were prepared on 10/08/2015 and analyzed on 10/16/2015.

Benzo[g,h,i]perylene was detected in method blank MB 680-404784/16-A at a level that was above the method detection limit but below the reporting limit. The value should be considered an estimate, and has been flagged. If the associated sample reported a result above the MDL and/or RL, the result has been flagged. Refer to the QC report for details.

The following analytes have been identified, in the reference method and/or via historical data, to be poor and/or erratic performers:

2,4-Dinitrophenol. These analytes may have a %D >60% if the average %D of all the analytes in the continuing calibration verification

(CCV) is 30%.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

DIESEL RANGE ORGANICS (DRO)

Samples TG-SB-Dup-1 (680-117546-2), TG-SB-1 (680-117546-3) and TG-SB-3 (680-117546-5) were analyzed for Diesel Range Organics (DRO) in accordance with EPA SW-846 Method 8015C. The samples were prepared and analyzed on 10/08/2015.

Sample TG-SB-Dup-1 (680-117546-2)[10X] required dilution prior to analysis. The reporting limits have been adjusted accordingly.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

DIESEL RANGE ORGANICS (DRO)

Sample TG-Blank-EQB (680-117546-13) was analyzed for Diesel Range Organics (DRO) in accordance with EPA SW-846 8015C. The samples were prepared on 10/09/2015 and analyzed on 10/12/2015.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

METALS (ICP)

Samples TG-SS-1 (680-117546-1), TG-SB-1 (680-117546-3), TG-SS-3 (680-117546-4), TG-SB-3 (680-117546-5), TG-SS-2

(680-117546-6), TG-SS-6 (680-117546-7), TG-SB-Dup-2 (680-117546-8), TG-SB-6 (680-117546-9), TG-SS-7 (680-117546-10), TG-SS-5

(680-117546-11), TG-SB-5 (680-117546-12) and TG-SS-4 (680-117546-15) were analyzed for Metals (ICP) in accordance with EPA SW-846 Method 6010C. The samples were prepared on 10/08/2015 and analyzed on 10/10/2015.

Cadmium failed the recovery criteria high for the MSD of sample TG-SB-1MSD (680-117546-3) in batch 680-405151.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

TOTAL MERCURY

Samples TG-SS-1 (680-117546-1), TG-SB-1 (680-117546-3), TG-SS-3 (680-117546-4), TG-SB-3 (680-117546-5), TG-SS-2

(680-117546-6), TG-SS-6 (680-117546-7), TG-SB-Dup-2 (680-117546-8), TG-SB-6 (680-117546-9), TG-SS-7 (680-117546-10), TG-SS-5

TestAmerica Savannah Page 4 of 75 10/23/2015

Project/Site: Savannah Tidegate

Job ID: 680-117546-1 (Continued)

Laboratory: TestAmerica Savannah (Continued)

(680-117546-11), TG-SB-5 (680-117546-12) and TG-SS-4 (680-117546-15) were analyzed for total mercury in accordance with EPA

SW-846 Method 7471B. The samples were prepared on 10/08/2015 and analyzed on 10/09/2015.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

PERCENT SOLIDS/MOISTURE

Samples TG-SS-1 (680-117546-1), TG-SB-Dup-1 (680-117546-2), TG-SB-1 (680-117546-3), TG-SS-3 (680-117546-4), TG-SB-3

(680-117546-5), TG-SS-2 (680-117546-6), TG-SS-6 (680-117546-7), TG-SB-Dup-2 (680-117546-8), TG-SB-6 (680-117546-9), TG-SS-7 (680-117546-10), TG-SS-5 (680-117546-11), TG-SB-5 (680-117546-12) and TG-SS-4 (680-117546-15) were analyzed for Percent

Solids/Moisture in accordance with TestAmerica SOP. The samples were analyzed on 10/08/2015.

No analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

TestAmerica Savannah Page 5 of 75 10/23/2015

Sample Summary TestAmerica Job ID: 680-117546-1Client: U.S. Army Corps of Engineers

Project/Site: Savannah Tidegate

Lab Sample ID Client Sample ID ReceivedCollectedMatrix

680-117546-1 TG-SS-1 Solid 10/07/15 08:40 10/07/15 14:24

680-117546-2 TG-SB-Dup-1 Solid 10/07/15 08:00 10/07/15 14:24

680-117546-3 TG-SB-1 Solid 10/07/15 09:00 10/07/15 14:24

680-117546-4 TG-SS-3 Solid 10/07/15 09:47 10/07/15 14:24

680-117546-5 TG-SB-3 Solid 10/07/15 10:05 10/07/15 14:24

680-117546-6 TG-SS-2 Solid 10/07/15 10:32 10/07/15 14:24

680-117546-7 TG-SS-6 Solid 10/07/15 10:55 10/07/15 14:24

680-117546-8 TG-SB-Dup-2 Solid 10/07/15 08:10 10/07/15 14:24

680-117546-9 TG-SB-6 Solid 10/07/15 11:05 10/07/15 14:24

680-117546-10 TG-SS-7 Solid 10/07/15 11:25 10/07/15 14:24

680-117546-11 TG-SS-5 Solid 10/07/15 11:35 10/07/15 14:24

680-117546-12 TG-SB-5 Solid 10/07/15 11:45 10/07/15 14:24

680-117546-13 TG-Blank-EQB Water 10/07/15 13:09 10/07/15 14:24

680-117546-14 TG-Blank-Trip Water 10/07/15 13:31 10/07/15 14:24

680-117546-15 TG-SS-4 Solid 10/07/15 12:12 10/07/15 14:24

TestAmerica Savannah

Page 6 of 75 10/23/2015

Method Summary

Project/Site: Savannah Tidegate

Method Method Description LaboratoryProtocol

SW8468260B Volatile Organic Compounds (GC/MS) TAL SAV

SW8468270D Semivolatile Organic Compounds (GC/MS) TAL SAV

SW8468015C DRO Diesel Range Organics (DRO) (GC) TAL SAV

SW8466010C Metals (ICP) TAL SAV

SW8467471B Mercury (CVAA) TAL SAV

EPAMoisture Percent Moisture TAL SAV

Protocol References:

EPA = US Environmental Protection Agency

SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.

Laboratory References:

TAL SAV = TestAmerica Savannah, 5102 LaRoche Avenue, Savannah, GA 31404, TEL (912)354-7858

TestAmerica Savannah

Page 7 of 75 10/23/2015

Definitions/Glossary

Project/Site: Savannah Tidegate

Qualifiers

GC/MS VOA

Qualifier Description

U Undetected at the Limit of Detection.

Qualifier

J Estimated: The analyte was positively identified; the quantitation is an estimation

GC/MS Semi VOA

Qualifier Description

U Undetected at the Limit of Detection.

Qualifier

Q One or more quality control criteria failed.

J Estimated: The analyte was positively identified; the quantitation is an estimation

GC Semi VOA

Qualifier Description

U Undetected at the Limit of Detection.

Qualifier

D The reported value is from a dilution.

Metals

Qualifier Description

J Estimated: The analyte was positively identified; the quantitation is an estimation

Qualifier

U Undetected at the Limit of Detection.

J Estimated: The quantitation is an estimation due to discrepancies in meeting certain analyte-specific quality control criteria.

Glossary

These commonly used abbreviations may or may not be present in this report.

¤ Listed under the "D" column to designate that the result is reported on a dry weight basis

Abbreviation

%R Percent Recovery

CFL Contains Free Liquid

CNF Contains no Free Liquid

DER Duplicate error ratio (normalized absolute difference)

Dil Fac Dilution Factor

DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample

DLC Decision level concentration

MDA Minimum detectable activity

EDL Estimated Detection Limit

MDC Minimum detectable concentration

MDL Method Detection Limit

ML Minimum Level (Dioxin)

NC Not Calculated

ND Not detected at the reporting limit (or MDL or EDL if shown)

PQL Practical Quantitation Limit

QC Quality Control

RER Relative error ratio

RL Reporting Limit or Requested Limit (Radiochemistry)

RPD Relative Percent Difference, a measure of the relative difference between two points

TEF Toxicity Equivalent Factor (Dioxin)

TEQ Toxicity Equivalent Quotient (Dioxin)

TestAmerica Savannah

Page 8 of 75 10/23/2015

Project/Site: Savannah Tidegate

Client Sample ID: TG-SS-1 Lab Sample ID: 680-117546-1

DLLOQ

☼mg/Kg0.771.9Arsenic

LOD

1.9

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA12.5 6010C

☼mg/Kg0.96 0.15Barium 0.38 Total/NA111 6010C

☼mg/Kg0.48 0.096Cadmium 0.29 Total/NA12.9 6010C

☼mg/Kg0.96 0.20Chromium 0.57 Total/NA114 6010C

☼mg/Kg0.96 0.33Lead 0.96 Total/NA18.1 6010C

☼mg/Kg0.019 0.0077Mercury 0.019 Total/NA10.017 J 7471B

Client Sample ID: TG-SB-Dup-1 Lab Sample ID: 680-117546-2

DLLOQ

☼ug/Kg1047Acetone

LOD

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J20 8260B

☼ug/Kg23 2.22-Butanone 2.2 Total/NA14.1 J 8260B

☼mg/Kg35 23Diesel Range Organics

[C10-C28]

32 Total/NA10470 D 8015C DRO

Client Sample ID: TG-SB-1 Lab Sample ID: 680-117546-3

DLLOQ

☼ug/Kg1048Acetone

LOD

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J25 8260B

☼ug/Kg24 2.32-Butanone 2.3 Total/NA14.8 J 8260B

☼mg/Kg3.6 2.3Diesel Range Organics

[C10-C28]

3.3 Total/NA1260 8015C DRO

☼mg/Kg1.9 0.75Arsenic 1.9 Total/NA11.9 6010C

☼mg/Kg0.94 0.15Barium 0.38 Total/NA17.6 6010C

☼mg/Kg0.47 0.094Cadmium 0.28 Total/NA14.1 J 6010C

☼mg/Kg0.94 0.20Chromium 0.57 Total/NA112 6010C

☼mg/Kg0.94 0.32Lead 0.94 Total/NA14.6 6010C

☼mg/Kg0.020 0.0078Mercury 0.020 Total/NA10.017 J 7471B

Client Sample ID: TG-SS-3 Lab Sample ID: 680-117546-4

DLLOQ

☼mg/Kg0.942.3Arsenic

LOD

2.3

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA12.3 6010C

☼mg/Kg1.2 0.19Barium 0.47 Total/NA129 6010C

☼mg/Kg0.59 0.12Cadmium 0.35 Total/NA10.32 J 6010C

☼mg/Kg1.2 0.25Chromium 0.70 Total/NA112 6010C

☼mg/Kg1.2 0.40Lead 1.2 Total/NA17.3 6010C

Client Sample ID: TG-SB-3 Lab Sample ID: 680-117546-5

DLLOQ

☼ug/Kg1047Acetone

LOD

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J36 8260B

☼ug/Kg23 2.22-Butanone 2.2 Total/NA16.3 J 8260B

☼mg/Kg4.0 2.5Diesel Range Organics

[C10-C28]

3.6 Total/NA112 8015C DRO

☼mg/Kg2.0 0.82Arsenic 2.0 Total/NA12.7 6010C

☼mg/Kg1.0 0.16Barium 0.41 Total/NA17.5 6010C

☼mg/Kg0.51 0.10Cadmium 0.31 Total/NA16.7 6010C

☼mg/Kg1.0 0.21Chromium 0.61 Total/NA117 6010C

☼mg/Kg1.0 0.35Lead 1.0 Total/NA12.7 6010C

☼mg/Kg0.022 0.0089Mercury 0.022 Total/NA10.019 J 7471B

TestAmerica Savannah

This Detection Summary does not include radiochemical test results.

Page 9 of 75 10/23/2015

Project/Site: Savannah Tidegate

Client Sample ID: TG-SS-2 Lab Sample ID: 680-117546-6

DLLOQ

☼mg/Kg0.802.0Arsenic

LOD

2.0

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J1.0 6010C

☼mg/Kg1.0 0.16Barium 0.40 Total/NA13.6 6010C

☼mg/Kg0.50 0.10Cadmium 0.30 Total/NA11.4 6010C

☼mg/Kg1.0 0.21Chromium 0.60 Total/NA14.8 6010C

☼mg/Kg1.0 0.34Lead 1.0 Total/NA11.5 6010C

☼mg/Kg0.021 0.0084Mercury 0.021 Total/NA10.0086 J 7471B

Client Sample ID: TG-SS-6 Lab Sample ID: 680-117546-7

DLLOQ

☼mg/Kg0.842.1Arsenic

LOD

2.1

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J1.3 6010C

☼mg/Kg1.1 0.17Barium 0.42 Total/NA119 6010C

☼mg/Kg0.53 0.11Cadmium 0.32 Total/NA10.59 6010C

☼mg/Kg1.1 0.22Chromium 0.63 Total/NA13.9 6010C

☼mg/Kg1.1 0.36Lead 1.1 Total/NA12.1 6010C

☼mg/Kg0.022 0.0086Mercury 0.022 Total/NA10.0086 J 7471B

Client Sample ID: TG-SB-Dup-2 Lab Sample ID: 680-117546-8

DLLOQ

☼mg/Kg0.842.1Arsenic

LOD

2.1

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J1.2 6010C

☼mg/Kg1.1 0.17Barium 0.42 Total/NA150 6010C

☼mg/Kg0.53 0.11Cadmium 0.32 Total/NA10.79 6010C

☼mg/Kg1.1 0.22Chromium 0.63 Total/NA14.5 6010C

☼mg/Kg1.1 0.36Lead 1.1 Total/NA12.7 6010C

Client Sample ID: TG-SB-6 Lab Sample ID: 680-117546-9

DLLOQ

☼mg/Kg0.822.0Arsenic

LOD

2.0

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA12.7 6010C

☼mg/Kg1.0 0.16Barium 0.41 Total/NA112 6010C

☼mg/Kg0.51 0.10Cadmium 0.31 Total/NA15.4 6010C

☼mg/Kg1.0 0.21Chromium 0.61 Total/NA117 6010C

☼mg/Kg1.0 0.35Lead 1.0 Total/NA13.6 6010C

☼mg/Kg0.021 0.0085Mercury 0.021 Total/NA10.031 7471B

Client Sample ID: TG-SS-7 Lab Sample ID: 680-117546-10

DLLOQ

☼mg/Kg0.761.9Arsenic

LOD

1.9

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J0.83 6010C

☼mg/Kg0.95 0.15Barium 0.38 Total/NA116 6010C

☼mg/Kg0.47 0.095Cadmium 0.28 Total/NA10.44 J 6010C

☼mg/Kg0.95 0.20Chromium 0.57 Total/NA13.6 6010C

☼mg/Kg0.95 0.32Lead 0.95 Total/NA11.5 6010C

Client Sample ID: TG-SS-5 Lab Sample ID: 680-117546-11

DLLOQ

☼mg/Kg0.842.1Arsenic

LOD

2.1

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J1.6 6010C

☼mg/Kg1.1 0.17Barium 0.42 Total/NA125 6010C

TestAmerica Savannah

This Detection Summary does not include radiochemical test results.

Page 10 of 75 10/23/2015

Project/Site: Savannah Tidegate

Client Sample ID: TG-SS-5 (Continued) Lab Sample ID: 680-117546-11

DLLOQ

☼mg/Kg0.110.53Cadmium

LOD

0.32

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA12.1 6010C

☼mg/Kg1.1 0.22Chromium 0.63 Total/NA18.3 6010C

☼mg/Kg1.1 0.36Lead 1.1 Total/NA13.5 6010C

☼mg/Kg0.021 0.0085Mercury 0.021 Total/NA10.018 J 7471B

Client Sample ID: TG-SB-5 Lab Sample ID: 680-117546-12

DLLOQ

☼mg/Kg0.852.1Arsenic

LOD

2.1

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA13.2 6010C

☼mg/Kg1.1 0.17Barium 0.42 Total/NA115 6010C

☼mg/Kg0.53 0.11Cadmium 0.32 Total/NA16.7 6010C

☼mg/Kg1.1 0.22Chromium 0.63 Total/NA120 6010C

☼mg/Kg1.1 0.36Lead 1.1 Total/NA15.6 6010C

☼mg/Kg0.020 0.0081Mercury 0.020 Total/NA10.037 7471B

Client Sample ID: TG-Blank-EQB Lab Sample ID: 680-117546-13

No Detections.

Client Sample ID: TG-Blank-Trip Lab Sample ID: 680-117546-14

No Detections.

Client Sample ID: TG-SS-4 Lab Sample ID: 680-117546-15

DLLOQ

☼mg/Kg0.842.1Arsenic

LOD

2.1

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA12.7 6010C

☼mg/Kg1.0 0.17Barium 0.42 Total/NA19.2 6010C

☼mg/Kg0.52 0.10Cadmium 0.31 Total/NA15.6 6010C

☼mg/Kg1.0 0.22Chromium 0.63 Total/NA117 6010C

☼mg/Kg1.0 0.36Lead 1.0 Total/NA111 6010C

☼mg/Kg0.024 0.0096Mercury 0.024 Total/NA10.031 7471B

TestAmerica Savannah

This Detection Summary does not include radiochemical test results.

Page 11 of 75 10/23/2015

Client Sample Results

Project/Site: Savannah Tidegate

Lab Sample ID: 680-117546-1Client Sample ID: TG-SS-1 Matrix: SolidDate Collected: 10/07/15 08:40

Percent Solids: 87.8Date Received: 10/07/15 14:24

Method: 6010C - Metals (ICP)

Arsenic

LOQ DLLOD

2.5 1.9 0.77 mg/Kg ☼ 110/10/15 02:301.9

Analyte Dil FacAnalyzedUnit DResult Qualifier

110/10/15 02:30☼mg/Kg0.150.380.9611Barium

110/10/15 02:30☼mg/Kg0.0960.290.482.9Cadmium

110/10/15 02:30☼mg/Kg0.200.570.9614Chromium

110/10/15 02:30☼mg/Kg0.330.960.968.1Lead

110/10/15 02:30☼mg/Kg0.931.92.4U1.9Selenium

110/10/15 02:30☼mg/Kg0.0570.140.96U0.14Silver

Method: 7471B - Mercury (CVAA)

Mercury

LOQ DLLOD

0.017 J 0.019 0.0077 mg/Kg ☼ 110/09/15 11:490.019

Analyte Dil FacAnalyzedUnit DResult Qualifier

TestAmerica Savannah

Page 12 of 75 10/23/2015

Project/Site: Savannah Tidegate

Lab Sample ID: 680-117546-2Client Sample ID: TG-SB-Dup-1 Matrix: SolidDate Collected: 10/07/15 08:00

Percent Solids: 93.3Date Received: 10/07/15 14:24

Method: 8260B - Volatile Organic Compounds (GC/MS)

Acetone

LOQ DLLOD

20 J 47 10 ug/Kg ☼ 110/15/15 18:2210

Analyte Dil FacAnalyzedUnit DResult Qualifier

110/15/15 18:22☼ug/Kg0.680.934.7U0.93Benzene

110/15/15 18:22☼ug/Kg1.61.64.7U1.6Bromobenzene

110/15/15 18:22☼ug/Kg3.13.14.7U3.1Bromochloromethane

110/15/15 18:22☼ug/Kg0.900.934.7U0.93Bromodichloromethane

110/15/15 18:22☼ug/Kg1.41.44.7U1.4Bromoform

110/15/15 18:22☼ug/Kg1.41.44.7U1.4Bromomethane

110/15/15 18:22☼ug/Kg2.22.223J4.12-Butanone

110/15/15 18:22☼ug/Kg2.22.24.7U2.2n-Butylbenzene

110/15/15 18:22☼ug/Kg2.02.04.7U2.0sec-Butylbenzene

110/15/15 18:22☼ug/Kg1.71.74.7U1.7tert-Butylbenzene

110/15/15 18:22☼ug/Kg1.01.04.7U1.0Carbon disulfide

110/15/15 18:22☼ug/Kg0.770.934.7U0.93Carbon tetrachloride

110/15/15 18:22☼ug/Kg0.890.934.7U0.93Chlorobenzene

110/15/15 18:22☼ug/Kg2.52.54.7U2.5Chloroethane

110/15/15 18:22☼ug/Kg1.01.04.7U1.0Chloroform

110/15/15 18:22☼ug/Kg0.931.94.7U1.9Chloromethane

110/15/15 18:22☼ug/Kg1.91.94.7U1.92-Chlorotoluene

110/15/15 18:22☼ug/Kg1.61.64.7U1.64-Chlorotoluene

110/15/15 18:22☼ug/Kg1.61.64.7U1.6Dibromochloromethane

110/15/15 18:22☼ug/Kg4.14.19.3U4.11,2-Dibromo-3-Chloropropane

110/15/15 18:22☼ug/Kg1.41.44.7U1.41,2-Dibromoethane

110/15/15 18:22☼ug/Kg1.61.64.7U1.6Dibromomethane

110/15/15 18:22☼ug/Kg1.21.24.7U1.21,2-Dichlorobenzene

110/15/15 18:22☼ug/Kg1.51.54.7U1.51,3-Dichlorobenzene

110/15/15 18:22☼ug/Kg0.690.934.7U0.931,4-Dichlorobenzene

110/15/15 18:22☼ug/Kg0.880.934.7U0.93Dichlorodifluoromethane

110/15/15 18:22☼ug/Kg1.01.04.7U1.01,1-Dichloroethane

110/15/15 18:22☼ug/Kg1.01.04.7U1.01,2-Dichloroethane

110/15/15 18:22☼ug/Kg1.31.34.7U1.3cis-1,2-Dichloroethene

110/15/15 18:22☼ug/Kg0.590.934.7U0.93trans-1,2-Dichloroethene

110/15/15 18:22☼ug/Kg0.590.939.3U0.931,2-Dichloroethene, Total

110/15/15 18:22☼ug/Kg1.41.44.7U1.41,1-Dichloroethene

110/15/15 18:22☼ug/Kg0.800.934.7U0.931,2-Dichloropropane

110/15/15 18:22☼ug/Kg1.71.74.7U1.71,3-Dichloropropane

110/15/15 18:22☼ug/Kg1.01.04.7U1.02,2-Dichloropropane

110/15/15 18:22☼ug/Kg0.880.934.7U0.931,1-Dichloropropene

110/15/15 18:22☼ug/Kg0.770.934.7U0.93cis-1,3-Dichloropropene

110/15/15 18:22☼ug/Kg0.810.934.7U0.93trans-1,3-Dichloropropene

110/15/15 18:22☼ug/Kg1.21.24.7U1.2Ethylbenzene

110/15/15 18:22☼ug/Kg2.92.94.7U2.9Hexachlorobutadiene

110/15/15 18:22☼ug/Kg3.13.123U3.12-Hexanone

110/15/15 18:22☼ug/Kg1.81.84.7U1.8Isopropylbenzene

110/15/15 18:22☼ug/Kg2.02.04.7U2.0p-Isopropyltoluene

110/15/15 18:22☼ug/Kg0.910.934.7U0.93Methylene Chloride

110/15/15 18:22☼ug/Kg3.93.923U3.94-Methyl-2-pentanone

110/15/15 18:22☼ug/Kg0.931.94.7U1.9Methyl tert-butyl ether

110/15/15 18:22☼ug/Kg2.52.54.7U2.5N-Propylbenzene

110/15/15 18:22☼ug/Kg0.870.934.7U0.93Styrene

TestAmerica Savannah

Page 13 of 75 10/23/2015

Project/Site: Savannah Tidegate

Lab Sample ID: 680-117546-2Client Sample ID: TG-SB-Dup-1 Matrix: SolidDate Collected: 10/07/15 08:00

Percent Solids: 93.3Date Received: 10/07/15 14:24

Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)

1,1,1,2-Tetrachloroethane

LOQ DLLOD

2.2 U 4.7 2.2 ug/Kg ☼ 110/15/15 18:222.2

Analyte Dil FacAnalyzedUnit DResult Qualifier

110/15/15…