Appendix C_Summary_DredgeSamplingData.pdf

Appendix C:

Summary of Sediment Sampling Data jsgeorgo@jsgdc.com Draft jsgeorgo@jsgdc.com Typewritten text Norfolk Degaussing Range Relocation Dredging, NS Norfolk FY23 and FY 24 Maintenance Dredging

Dredged Material Characteristics and Placement – Channel Segment Deepening

• Sediments characterized by EA in June 2020 ‐ Norfolk Harbor Deepening–Sewells Point to Lamberts Bend

• Dredging Unit (DU) 2

• Sediments sampled/tested to ‐60 ft MLLW

• Testing included: bulk sediment and elutriate chemistry, water column and whole sediment bioassays, and bioaccumulation exposures

• Materials identified as suitable for placement at CIDMMA and Norfolk Ocean Disposal Site (NODS)

• NAVFAC requests option for either CIDMMA or NODS placement jsgeorgo@jsgdc.com Typewritten text Norfolk Degaussing Range

ANALYTE UNITS Average RL

DU2 DU2-FD

GRAIN SIZE

GRAVEL % -- 0 0

SAND % -- 25 23.1

COARSE SAND % -- 0.1 0.1

MEDIUM SAND % -- 1.4 1.3

FINE SAND % -- 23.5 21.7

SILT % -- 44.8 47.6

CLAY % -- 30.2 29.3

SILTCLAY % -- 75 76.9

PHYSICAL PROPERTIES

LIQUID LIMIT NONE -- 37 42

PERCENT MOISTURE % 0.1 33.1 32.6

PERCENT SOLIDS % 0.1 66.9 67.4

PLASTIC LIMIT NONE -- 21 21

PLASTICITY INDEX NONE -- 16 21

SPECIFIC GRAVITY NONE -- 2.71 2.72

NOTES:

RL = laboratory reporting limit FD = Field Duplicate

TABLE 1. PHYSICAL CHARACTERISTICS FOR

SEDIMENT - DREDGING UNIT 2

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO

LAMBERTS BEND, VIRGINIA (JUNE 2020)

jsgeorgo@jsgdc.com

Norfolk Degaussing Range

ANALYTE UNITS Average RL

AMMONIA, DISTILLED mg/kg 18 70 64

SULFIDE mg/kg 54 45 U 45 U

NITRATE NITRITE AS N mg/kg 1.8 1.5 U 1.5 U

NITROGEN, KJELDAHL mg/kg 264 910 730

CYANIDE, TOTAL mg/kg 0.36 0.33 U 0.27 U

PHOSPHORUS mg/kg 6.05 200 250

TOTAL ORGANIC CARBON MG/KG 1791 9,200 8,900

TOTAL ORGANIC CARBON % -- 0.92 0.89

NOTES: Bold values represent detected concentrations.

RL = laboratory reporting limit

U = compound was analyzed, but not detected FD = Field Duplicate

TABLE 2. GENERAL CHEMISTRY CONCENTRATIONS

(mg/kg) IN SEDIMENT - DREDGING UNIT 2

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO

LAMBERTS BEND, VIRGINIA (JUNE 2020)

ANALYTE UNITS RL Range TEL* PEL*

ALUMINUM mg/kg 3.7-8 -- -- 11,000 10,000

ANTIMONY mg/kg 0.12-0.27 -- -- 0.042 J 0.042 J

ARSENIC mg/kg 0.061-0.13 7.24 41.6 5.1 4.7

BARIUM mg/kg 0.61-1.3 -- -- 26 24

BERYLLIUM mg/kg 0.061-0.13 -- -- 0.59 0.58

CADMIUM mg/kg 0.061-0.13 0.68 4.21 0.047 J 0.049 J

CALCIUM mg/kg 31-66 -- -- 4,200 4,100

CHROMIUM mg/kg 0.12-0.27 52.3 160 19 18

COBALT mg/kg 0.031-0.066 -- -- 7.2 6.7

COPPER mg/kg 0.18-0.4 18.7 108 6.4 5.9

IRON mg/kg 3.1-6.6 -- -- 18,000 16,000

LEAD mg/kg 0.061-0.13 30.2 112 7.9 7.3

MAGNESIUM mg/kg 31-66 -- -- 4,900 4,700

MANGANESE mg/kg 0.31-0.66 -- -- 220 220

MERCURY mg/kg 0.017-0.041 0.13 0.696 0.023 U 0.021 U

NICKEL mg/kg 0.061-0.13 15.9 42.8 14 13

POTASSIUM mg/kg 31-66 -- -- 2,200 2,000

SELENIUM mg/kg 0.31-0.66 -- -- 0.13 J 0.13 J

SILVER mg/kg 0.061-0.13 0.73 1.77 0.074 U 0.024 J

SODIUM mg/kg 31-66 -- -- 4100 3900

THALLIUM mg/kg 0.061-0.13 -- -- 0.14 0.14

TIN mg/kg 0.61-1.3 48 -- 2.6 2.4

VANADIUM mg/kg 0.061-0.13 -- -- 22 21

ZINC mg/kg 0.31-0.66 124 271 41 39

*Source : MacDonald et al. 1996. Ecotoxicology 5: 253-278.

NOTES: Bold values represent detected concentrations. Shaded concentrations exceed sediment quality guidelines

RL is reported for non-detected constituents

-- = no value available.

NC = not calculated; AVS was not detected

RL = laboratory reporting limit

TEL = threshold effects level

PEL = probable effects level

FD = Field Duplicate

J = compound was detected, but below the reporting limit (value is estimated)

U = compound was analyzed, but not detected

TABLE 3. METALS CONCENTRATIONS (mg/kg) IN SEDIMENT -

DREDGING UNIT 2

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND,

VIRGINIA (JUNE 2020)

ANALYTE UNITS RL Range TEL(b) PEL(b)

PCB 8 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 18 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 28 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 44 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 49 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 52 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 66 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 77 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 87 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 101 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 105 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 118 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 126 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 128 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 138 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 153 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 156 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 169 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 170 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 180 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 183 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 184 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 187 (BZ)(a) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 195 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 206 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

PCB 209 (BZ) µg/kg 0.61-1.3 -- -- 0.73 U 0.71 U

TOTAL PCBs (ND=0) µg/kg -- 21.6 189 0 0

TOTAL PCBs (ND=1/2RL) µg/kg -- 21.6 189 13.1 12.8

TOTAL PCBs (ND=RL) µg/kg -- 21.6 189 26.3 25.6

(a) PCB congeners used for Total PCB summation, as per Table 9-3 of the ITM (USEPA/USACE 1998)

(b) Source : MacDonald et al. 1996. Ecotoxicology 5: 253-278.

NOTES: Bold values represent detected concentrations. Shaded concentrations exceed sediment quality guidelines.

RL is reported for non-detected constituents.

-- = no value available.

RL = laboratory reporting limit U = compound was analyzed, but not detected

TEL = threshold effects level FD = Field Duplicate

PEL = probable effects level

Analyte concentration is between TEL and PEL value

TABLE 4. PCB CONGENER CONCENTRATIONS (µg/kg) IN SEDIMENT -

DREDGING UNIT 2

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND, VIRGINIA

(JUNE 2020)

LOW MOLECULAR WEIGHT PAHs (LPAH)

1-METHYLNAPHTHALENE µg/kg 4.2-40 -- -- 5 U 10 U

2-METHYLNAPHTHALENE µg/kg 4.2-40 20.2 201 5 U 10 U

ACENAPHTHENE µg/kg 4.2-40 6.71 88.9 5 U 10 U

ACENAPHTHYLENE µg/kg 4.2-40 5.87 128 5 U 10 U

ANTHRACENE µg/kg 4.2-40 46.9 245 5 U 10 U

FLUORENE µg/kg 4.2-40 21.2 144 5 U 10 U

NAPHTHALENE µg/kg 4.2-40 34.6 391 5 U 10 U

PHENANTHRENE µg/kg 4.2-40 86.7 544 1.5 J 2.9 J

TOTAL LPAHs (ND=0) µg/kg -- -- -- 1.5 2.9

TOTAL LPAHs (ND=1/2RL) µg/kg -- -- -- 19 37.9

TOTAL LPAHs (ND=RL) µg/kg -- -- -- 36.5 72.9

HIGH MOLECULAR WEIGHT PAHs (HPAH)

BENZO(A)ANTHRACENE µg/kg 4.2-40 74.8 693 5 U 4.8 J

BENZO(A)PYRENE µg/kg 4.2-40 88.8 763 5 U 10 U

BENZO(B)FLUORANTHENE µg/kg 4.2-40 -- -- 5 U 5.6 J

BENZO(GHI)PERYLENE µg/kg 4.2-40 -- -- 5 U 10 U

BENZO(K)FLUORANTHENE µg/kg 4.2-40 -- -- 5 U 10 U

CHRYSENE µg/kg 4.2-40 108 846 5 U 10 U

DIBENZO(A,H)ANTHRACENE µg/kg 4.2-40 6.22 135 5 U 10 U

FLUORANTHENE µg/kg 4.2-40 113 1,494 5 U 6 J

INDENO(1,2,3-CD)PYRENE µg/kg 4.2-40 -- -- 5 U 10 U

PYRENE µg/kg 4.2-40 153 1,398 5 U 4 J

TOTAL HPAHs (ND=0) µg/kg -- -- -- 0 20.4

TOTAL HPAHs (ND=1/2RL) µg/kg -- -- -- 25 50.4

TOTAL HPAHs (ND=RL) µg/kg -- -- -- 50 80.4

TOTAL PAHs

TOTAL PAHs (ND=0) µg/kg -- 1,684 16,770 1.5 23.3

TOTAL PAHs (ND=1/2RL) µg/kg -- 1,684 16,770 44 88.3

TOTAL PAHs (ND=RL) µg/kg -- 1,684 16,770 86.5 153

*Source : MacDonald et al. 1996. Ecotoxicology 5: 253-278.

NOTES: Bold values represent detected concentrations. Shaded concentrations exceed sediment quality guidelines.

RL is reported for non-detected constituents

-- = no value available.

RL = laboratory reporting limit J = compound was detected, but below the reporting limit (value is estimated)

TEL = threshold effects level U = compound was analyzed, but not detected

PEL = probable effects level FD = Field Duplicate

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND, VIRGINIA

(JUNE 2020)

TABLE 5. POLYCYCLIC AROMATIC HYDROCARBON

CONCENTRATIONS (µg/kg) IN SEDIMENT - DREDGING UNIT 2

4,4'-DDD µg/kg 0.051-0.56 1.22 7.81 0.34 0.3 U

4,4'-DDE µg/kg 0.051-0.56 2.07 374 0.31 U 0.3 U

4,4'-DDT µg/kg 0.051-0.56 1.19 4.77 0.31 U 0.3 U

CHLORINATED PESTICIDES

ALDRIN µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

ALPHA-BHC µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

BETA-BHC µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

CHLORDANE (TECHNICAL) µg/kg 0.51-5.6 2.26 4.79 3.1 U 3 U

CHLOROBENSIDE µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

DACHTAL (DCPA) µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

DELTA-BHC µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

DIELDRIN µg/kg 0.051-0.56 0.72 4.3 0.31 U 0.3 U

ENDOSULFAN I µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

ENDOSULFAN II µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

ENDOSULFAN SULFATE µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

ENDRIN µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

ENDRIN ALDEHYDE µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

GAMMA-BHC µg/kg 0.051-0.56 0.32 0.99 0.31 U 0.3 U

HEPTACHLOR µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

HEPTACHLOR EPOXIDE µg/kg 0.051-0.56 -- 2.74 ** 0.31 U 0.3 U

METHOXYCHLOR µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

MIREX µg/kg 0.051-0.56 -- -- 0.31 U 0.3 U

TOXAPHENE µg/kg 2-22 0.1 ** -- 12 U 12 U

ORGANOPHOSPHORUS PESTICIDES

AZINPHOS-METHYL µg/kg 20-44 -- -- 25 U 24 U

DEMETON, TOTAL µg/kg 41-88 -- -- 49 U 49 U

MALATHION µg/kg 20-44 -- -- 25 U 24 U

METHYL PARATHION µg/kg 20-44 -- -- 25 U 24 U

PARATHION µg/kg 20-44 -- -- 25 U 24 U

*Source : MacDonald et al. 1996. Ecotoxicology 5: 253-278.

** Source: CCME 2001. Canadian Sediment Quality Guidelines for the Protection of Aquatic Life.

NOTES: Bold values represent detected concentrations; RL is reported for non-detected constituents.

-- = no value available.

RL = laboratory reporting limit U = compound was analyzed, but not detected

TEL = threshold effects level FD = Field Duplicate

PEL = probable effects level

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND, VIRGINIA

(JUNE 2020)

TABLE 6. CHLORINATED AND ORGANOPHOSPHORUS PESTICIDE

CONCENTRATIONS (µg/kg) IN SEDIMENT - DREDGING UNIT 2

ANALYTE UNITS RL Range ISQG(a) PEL(a)

TEF*

DU2 DU2-FD

2,3,7,8-TCDD ng/kg 0.65-1.3 0.85 21.5 1 0.27 J 0.24 J

1,2,3,7,8-PECDD ng/kg 3.3-6.4 -- -- 1 1.6 J 1.6 J

1,2,3,4,7,8-HXCDD ng/kg 3.3-6.4 -- -- 0.1 2.9 J B 3.1 J B

1,2,3,6,7,8-HXCDD ng/kg 3.3-6.4 -- -- 0.1 4.3 J B 4.5 J B

1,2,3,7,8,9-HXCDD ng/kg 3.3-6.4 -- -- 0.1 12 B 12 B

1,2,3,4,6,7,8-HPCDD ng/kg 3.3-6.4 -- -- 0.01 120 B 120 B

OCDD ng/kg 6.5-13 -- -- 0.0003 1800 B 1500 B

2,3,7,8-TCDF ng/kg 0.65-1.3 -- -- 0.1 0.17 J Q 0.15 J

1,2,3,7,8-PECDF ng/kg 3.3-6.4 -- -- 0.03 4.9 U 0.076 J

2,3,4,7,8-PECDF ng/kg 3.3-6.4 -- -- 0.3 4.9 U 0.061 J Q

1,2,3,4,7,8-HXCDF ng/kg 3.3-6.4 -- -- 0.1 4.9 U 0.11 J B

1,2,3,6,7,8-HXCDF ng/kg 3.3-6.4 -- -- 0.1 4.9 U 0.085 J B Q

2,3,4,6,7,8-HXCDF ng/kg 3.3-6.4 -- -- 0.1 4.9 U 0.043 J B Q

1,2,3,7,8,9-HXCDF ng/kg 3.3-6.4 -- -- 0.1 4.9 U 0.065 J B Q

1,2,3,4,6,7,8-HPCDF ng/kg 3.3-6.4 -- -- 0.01 0.43 J B 0.5 J B

1,2,3,4,7,8,9-HPCDF ng/kg 3.3-6.4 -- -- 0.01 0.04 J B 0.064 J B

OCDF ng/kg 6.5-13 -- -- 0.0003 0.51 J B 0.65 J B

DIOXIN TEQ (ND=0) ng/kg -- 0.85 21.5 -- 5.53 5.48

DIOXIN TEQ (ND=1/2RL) ng/kg -- 0.85 21.5 -- 7.32 5.48

DIOXIN TEQ (ND=RL) ng/kg -- 0.85 21.5 -- 9.11 5.48

(a) Source: CCME 2001 and CCME 2002. Canadian Sediment Quality Guidelines for the Protection of Aquatic Life.

NOTES: Bold values represent detected concentrations. Shaded concentrations exceed sediment quality guidelines.

-- = no value available.

RL = laboratory reporting limit B = compound was detected in the laboratory method blank

TEF = toxicity equivalency factor J = compound was detected, but below the reporting limit (value is estimated)

ISQG = interim sediment quality guideline Q = compound was detected, but as an estimated maximum concentration

PEL = probable effects level FD = Field Duplicate

Analyte concentration is between ISQG and PEL value

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND, VIRGINIA (JUNE

2020)

TABLE 7. DIOXIN AND FURAN CONGENER CONCENTRATIONS (ng/kg) IN

SEDIMENT - DREDGING UNIT 2

*Source : Van den Berg, M, et al. 2006. The 2005 World Health Organization Re-evaluation of Human and Mammalian Toxic Equivalency Factors for Dioxins and Dioxin-Like Compounds. Toxicological Sciences 93(2):223-241.

1,2,4-TRICHLOROBENZENE µg/kg 21-200 -- -- 24 U 49 U

1,2-DICHLOROBENZENE µg/kg 21-200 -- -- 24 U 49 U

1,2-DIPHENYLHYDRAZINE(AS AZOBENZENE) µg/kg 21-200 -- -- 24 U 49 U

1,3-DICHLOROBENZENE µg/kg 21-200 -- -- 24 U 49 U

1,4-DICHLOROBENZENE µg/kg 21-200 -- -- 24 U 49 U

2,2'-OXYBIS[1-CHLOROPROPANE] µg/kg 4.2-40 -- -- 5 U 10 U

2,4,6-TRICHLOROPHENOL µg/kg 21-200 -- -- 24 U 49 U

2,4-DICHLOROPHENOL µg/kg 4.2-40 -- -- 5 U 10 U

2,4-DIMETHYLPHENOL µg/kg 21-200 -- -- 24 U 49 U

2,4-DINITROPHENOL µg/kg 210-2000 -- -- 240 U 490 U

2,4-DINITROTOLUENE µg/kg 21-200 -- -- 24 U 49 U

2,6-DINITROTOLUENE µg/kg 21-200 -- -- 24 U 49 U

2-CHLORONAPHTHALENE µg/kg 4.2-40 -- -- 5 U 10 U

2-CHLOROPHENOL µg/kg 21-200 -- -- 24 U 49 U

2-METHYLPHENOL µg/kg 21-200 -- -- 24 U 49 U

2-NITROPHENOL µg/kg 21-200 -- -- 24 U 49 U

3,3'-DICHLOROBENZIDINE µg/kg 21-200 -- -- 24 U 49 U

4,6-DINITRO-2-METHYLPHENOL µg/kg 110-1000 -- -- 130 U 250 U

4-BROMOPHENYL PHENYL ETHER µg/kg 21-200 -- -- 24 U 49 U

4-CHLORO-3-METHYLPHENOL µg/kg 21-200 -- -- 24 U 49 U

4-CHLOROPHENYL PHENYL ETHER µg/kg 21-200 -- -- 24 U 49 U

4-NITROPHENOL µg/kg 110-1000 -- -- 130 U 250 U

BENZIDINE µg/kg 420-4000 -- -- 500 U 1000 U

BENZOIC ACID µg/kg 110-1000 -- -- 130 U 250 U

BENZYL ALCOHOL µg/kg 21-200 -- -- 24 U 49 U

BIS(2-CHLOROETHOXY)METHANE µg/kg 21-200 -- -- 24 U 49 U

BIS(2-CHLOROETHYL)ETHER µg/kg 4.2-40 -- -- 5 U 10 U

BIS(2-ETHYLHEXYL) PHTHALATE µg/kg 210-2000 182 2,647 240 U 490 U

BUTYL BENZYL PHTHALATE µg/kg 21-200 -- -- 24 U 49 U

DIBENZOFURAN µg/kg 21-200 -- -- 24 U 49 U

DIETHYL PHTHALATE µg/kg 21-200 -- -- 24 U 49 U

DIMETHYL PHTHALATE µg/kg 21-200 -- -- 24 U 49 U

DI-N-BUTYL PHTHALATE µg/kg 21-200 -- -- 24 U 49 U

DI-N-OCTYL PHTHALATE µg/kg 21-200 -- -- 24 U 49 U

HEXACHLOROBENZENE µg/kg 4.2-40 -- -- 5 U 10 U

HEXACHLOROBUTADIENE µg/kg 4.2-40 -- -- 5 U 10 U

HEXACHLOROCYCLOPENTADIENE µg/kg 21-200 -- -- 24 U 49 U

HEXACHLOROETHANE µg/kg 21-200 -- -- 24 U 49 U

ISOPHORONE µg/kg 21-200 -- -- 24 U 49 U

METHYLPHENOL, 3 & 4 µg/kg 21-200 -- -- 24 U 49 U

NITROBENZENE µg/kg 41-400 -- -- 50 U 99 U

N-NITROSODIMETHYLAMINE µg/kg 21-200 -- -- 24 U 49 U

N-NITROSODI-N-PROPYLAMINE µg/kg 4.2-40 -- -- 5 U 10 U

N-NITROSODIPHENYLAMINE µg/kg 21-200 -- -- 24 U 49 U

PENTACHLOROPHENOL µg/kg 110-1000 -- -- 130 U 250 U

PHENOL µg/kg 21-200 -- -- 24 U 49 U

* Source: MacDonald et al. 1996. Ecotoxicology 5:253-278.

NOTES: Bold values represent detected concentrations; RL is reported for non-detected constituents.

-- = no value available.

RL = laboratory reporting limit U = compound was analyzed, but not detected

TEL = threshold effects level FD = Field Duplicate

PEL = probable effects level

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO LAMBERTS BEND,

VIRGINIA (JUNE 2020)

TABLE 8. SEMIVOLATILE ORGANIC COMPOUND CONCENTRATIONS

(g/kg) IN SEDIMENT

ANALYTE UNITS RL Range

MONOBUTYLTIN µg/kg 26-56 32 U 30 U

DIBUTYLTIN µg/kg 1.6-3.5 2 U 1.9 U

TRIBUTYLTIN µg/kg 1.9-4.1 2.3 U 2.2 U

TETRABUTYLTIN µg/kg 2.1-4.6 2.6 U 2.5 U

RL = laboratory reporting limit

U = compound was analyzed, but not detected

FD = Field Duplicate

TABLE 9. BUTYLTIN CONCENTRATIONS (g/kg)

IN SEDIMENT - DREDGING UNIT 2

NORFOLK HARBOR DEEPENING, SEWELLS POINT TO

LAMBERTS BEND, VIRGINIA (JUNE 2020)

NOTES: Bold values represent detected concentrations; RL is reported for non-detected constituents.

GEOTECHNICAL DATA REPORT

Underwater Electro-Magnetic Measurement System (UEMMS) Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Schnabel Reference 22330030 July 8, 2022

July 8, 2022

Mr. Woody Bottom Marine Solutions 225 Industry Parkway Nicholasville, KY 40356

Subject: Project 22330030, Geotechnical Data Report, Underwater Electro-Magnetic Measurement System (UEMMS), Norfolk Harbor Entrance Reach Channel, Norfolk, Virginia

Dear Mr. Bottom:

SCHNABEL ENGINEERING, LLC (Schnabel) is pleased to submit our geotechnical engineering report for this project. This study was performed in accordance with our Subcontract Agreement dated March 4, 2022.

SITE AND PROJECT DESCRIPTION

The site is in the Norfolk Harbor Entrance Reach Channel, about 10,300 f t north of Naval Station Norfolk and about 5,000 f t west of the south island of the Hampton Roads Bridge Tunnel. The site is in the center of the channel, with the existing mudline at about El -60. A Site Vicinity Map is included as Figure 1.

The U.S. Army Corps of Engineers (USACE) is widening and deepening the Port of Virginia, making it one of the deepest ports on the East Coast. USACE will deepen the Norfolk Channel f rom 60 to 62 f t below Mean Lower-Low Water (MLLW) level. This will directly af fect the Naval Station Norfolk Degaussing Range and will require complete demolition of the existing array within the channel boundaries, and the construction of a new array at a dif ferent location within the channel. The existing UEMMS, also located in the Norfolk Harbor Entrance Reach Channel, currently provides ranging services to U.S. Navy ships homeported at or visiting Naval Station Norfolk, VA. The range consists of 27 sensors and is centered on the navigation channel at approximately 60 feet below MLLW.

The array is used to acquire and analyze the magnetic and electric f ield signatures of surface combatants and submarines. With this information, on-board degaussing systems can be evaluated, and calibrated if necessary, to reduce the vessel’s susceptibility to electro-magnetic threat systems (i.e. seaborne magnetic mines or magnetic anomaly detection systems).

We obtained the site and project information f rom the Scope of Architect-Engineer Services document dated May 2021, and communication with your of fice.

Norfolk UEMMS

July 8, 2022 Page 2 Schnabel Engineering, LLC Project 22330030 ©2022 All Rights Reserved

SUBSURFACE EXPLORATION AND TESTING PROGRAM

We performed a subsurface exploration and f ield testing program to identify the subsurface stratigraphy underlying the site and to evaluate the geotechnical properties of the materials encountered. This program included test borings and soil laboratory testing. Exploration methods used are discussed below. The appendices contain the results of our exploration.

Subsurface Exploration Methods

Test Borings

Our subcontractor, Fishburne Drilling, Inc., drilled three test borings under our observation on June 14 and 15, 2022. The Standard Penetration Test (SPT) was performed at selected depths in the borings.

Appendix A includes specif ic observations, remarks, and logs for the borings; classif ication criteria; drilling methods; and sampling protocols. Figure 2 is included at the end of this report and indicates the approximate test boring locations. We will retain soil samples up to 45 days beyond the issuance of this report, unless you request other disposition.

The SPT samples were obtained using a hydraulically driven automatic trip hammer (ATH). Most correlations with SPT data are based on N-values collected with a safety hammer. The energy applied to the split-spoon sampler using the ATH is about 33 percent greater than that applied using the safety hammer, resulting in lower N-values. The hammer blows shown on the boring logs are uncorrected for the higher energy.

Soil Laboratory Testing

Our laboratory performed tests on selected samples collected during the subsurface exploration. The testing aided in the classif ication of materials encountered in the subsurface exploration. The results of the laboratory tests are included in Appendix B and are summarized for each stratum in the Site Geology and Subsurface Conditions section of this report. Selected test results are also shown on the boring logs in Appendix A.

SITE GEOLOGY AND SUBSURFACE CONDITIONS

Site Geology

We reviewed existing geologic data and information in our f iles. Based on this review, the soils on this site consist of recent alluvium f rom the Holocene era underlain by the soils of the Tabb Formation. At the depths explored, only the recent alluvium was encountered in the borings.

Generalized Subsurface Stratigraphy

We observed water depths of 60 to 62 f t at the boring locations at the time of drilling. Borings B-01 and B-03 were started at low tide and boring B-02 was started at high tide. We characterized the following generalized subsurface stratigraphy below the mudline, based on the exploration and laboratory test data included in the appendices.

July 8, 2022 Page 3 Schnabel Engineering, LLC

Stratum A1: Fine-Grained Alluvium

At the mudline and interlayered with the coarse-grained soils of Stratum A2, the borings encountered f ine-grained alluvial soils consisting of fat clay (CH) and lean clay (CL) with varying amounts of sand, mica, and shell f ragments to depths of about 27 to 32 f t below the mudline, about EL -88.9 to -93. These high plasticity soils have liquid limits of 39 to 85 and plasticity indices of 22 to 57. The natural moisture contents measured were about 46 to 79 percent. Based on the Standard Penetration Tests performed, this stratum is very sof t: N ≤ 2.

Stratum A2: Coarse-Grained Alluvium

Below the mudline and interlayered with the f ine-grained soils of Stratum A1, the borings encountered coarse-grained alluvial soils consisting of clayey sand (SC), silty clayey sand (SC-SM), silty sand (SM), and poorly graded sand with silt (SP-SM) to the maximum depth of exploration, about 40 f t below the mudline (approximately EL -102.3). Atterberg limit testing performed on samples representing Stratum A2 indicate the f ines f raction of these soils are low to moderate plasticity having liquid limits of 23 to 43 and plasticity indices of 2 to 25. The natural moisture contents measured were about 24 to 51 percent.

Based on the Standard Penetration Tests performed, this stratum is very loose to medium dense: N ≤ 16.

LIMITATIONS

This report has been prepared to aid in the evaluation of this site and to assist in the design of the project.

It is intended for use concerning this specif ic project.

We have endeavored to complete the services identif ied herein in a manner consistent with that level of care and skill ordinarily exercised by members of the profession currently practicing in the same locality and under similar conditions as this project. No other representation, express or implied, is included or intended, and no warranty or guarantee is included or intended in this report, or other instrument of service.

July 8, 2022 Page 4 Schnabel Engineering, LLC

We appreciate the opportunity to be of service for this project. Please call us if you have any questions regarding this report.

Sincerely, SCHNABEL ENGINEERING, LLC

Kevin D. Pocta, PE Senior Engineer

Evan B. Morris, PE Associate

KDP:EBM:rl

Figures Appendix A: Subsurface Exploration Data Appendix B: Soil Laboratory Test Data

July 8, 2022 Schnabel Engineering, LLC

FIGURES

Figure 1: Site Vicinity Map Figure 2: Boring Location Plan

³ 5/2

5/2

Th is Ma p w as

C rea ted In

Sc hn ab el

En gin ee rin gs Si te Vic ini ty

Ma p A pp lica tio n

NOT TO SCALE

arc gis

SITE VICINITY

MAP

FIGURE 1

NORFOLK UEMMS

NORFOLK HARBOR ENTRANCE REACH CHANNEL

NORFOLK, VIRGINIA

PROJECT NO. 22330030

Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, (c) OpenStreetMap contributors, and the GIS User Community Esri, HERE, Garmin, (c) OpenStreetMap contributors Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Projection: WGS 1984 Web Mercator Auxiliary Sphere

© Schnabel Engineering, 2022. All Rights Reserved.

Approximate Boring Location

Proposed UEMMS

Legend

NORFOLK UEMMS

NORFOLK HARBOR ENTRANCE

REACH CHANNEL

NORFOLK, VIRGINIA

Reviewed:

Done:

Project Number:

Figure Name: Figure Number:

Date:

E. MORRIS

K. POCTABORING LOCATION PLAN

22330030.000

JULY 2022

EXISTING UEMMS

APPENDIX A

SUBSURFACE EXPLORATION DATA

Subsurface Exploration Procedures General Notes for Subsurface Exploration Logs Identif ication of Soil Boring Logs, B-01 through B-03

SUBSURFACE EXPLORATION PROCEDURES

Test Borings – Mud Rotary

Drillers advanced the borings using mud rotary drilling techniques. The boring is advanced with a drill string consisting of a 3⅞-inch diameter tri-cone roller bit attached to A-sized drilled rods. Bentonite drilling f luid is pumped through the drill rods to f lush cuttings to the surface. The borehole remains full of drilling f luid to maintain the sides of the borehole. At the designated depth, the drillers removed the drill string and performed the Standard Penetration Test (SPT).

Standard Penetration Test Results

The numbers in the Sampling Data column of the boring logs represent Standard Penetration Test (SPT) results. Each number represents the blows needed to drive a 2-inch O.D., 1⅜-inch I.D. split-spoon sampler 6 inches, using a 140-pound hammer falling 30 inches. The sampler is typically driven a total of 24 inches. The f irst 6 inches are considered a seating interval. The total of the number of blows for the second and third 6-inch intervals is the SPT “N value.” The SPT is performed according to ASTM D1586.

The SPT samples were obtained using a hydraulically driven automatic trip hammer (ATH). Most correlations with SPT data are based on N-values collected with a safety hammer. The energy applied to the split-spoon sampler using the ATH is about 33 percent greater than that applied using the safety hammer, resulting in lower N-values. The hammer blows shown on the boring logs are uncorrected for the higher energy.

Soil Classification Criteria

The group symbols on the logs represent the Unif ied Soil Classif ication System Group Symbols (ASTM D2487) based on visual observation and limited laboratory testing of the samples. Criteria for visual identif ication of soil samples are included in this appendix. Some variation can be expected between samples visually classif ied and samples classif ied in the laboratory.

Pocket Penetrometer Results

The values following “PP=” in the sampling data column of the logs represent pocket penetrometer readings. Pocket penetrometer readings provide an estimate of the unconf ined compressive strength of f ine-grained soils.

Boring Locations and Elevations

Borings locations were located using sub-centimeter GPS equipment. Approximate boring locations are shown on Figure 2. Water surface elevations at the boring locations were obtained f rom the GPS and are indicated on the boring logs. Locations and elevations should be considered no more accurate than the methods used to determine them.

GENERAL NOTES FOR

SUBSURFACE EXPLORATION LOGS

1. Numbers in sampling data column next to Standard Penetration Test (SPT) symbols indicate blows required to drive a 2-inch O.D., 1⅜-inch I.D. sampling spoon 6 inches using a 140 pound hammer falling 30 inches. The Standard Penetration Test (SPT) N value is the number of blows required to drive the sampler 12 inches, af ter a 6 inch seating interval. The Standard Penetration Test is performed in general accordance with ASTM D1586.

2. Visual classif ication of soil is in accordance with terminology set forth in “Identif ication of Soil.”

The ASTM D2487 group symbols (e.g., CL) shown in the classif ication column are based on visual observations.

3. Estimated water levels indicated on the logs are only estimates f rom available data and may vary with precipitation, porosity of the soil, site topography, and other factors.

4. Refusal at the surface of rock, boulder, or other obstruction is def ined as an SPT resistance of 50 blows for 1 inch or less of penetration.

5. The logs and related information depict subsurface conditions only at the specif ic locations and at the particular time when drilled or excavated. Soil conditions at other locations may dif fer f rom conditions occurring at these locations. Also, the passage of time may result in a change in the subsurface soil and water level conditions at the subsurface exploration location.

6. The stratif ication lines represent the approximate boundary between soil and rock types as obtained f rom the subsurface exploration. Some variation may also be expected vertically between samples taken. The soil prof ile, water level observations and penetration resistances presented on these logs have been made with reasonable care and accuracy and must be considered only an approximate representation of subsurface conditions to be encountered at the particular location.

7. Key to symbols and abbreviations:

S-1, SPT Sample No., Standard Penetration Test 5+10+10 Number of blows in each 6-inch increment WOR = Weight of Rods WOH = Weight of Hammer

LL Liquid Limit MC Moisture Content (percent) PL Plastic Limit PP Pocket Penetrometer Reading (tsf ) %Passing#200 Percent by weight passing a No. 200 Sieve

IDENTIFICATION OF SOIL

I. DEFINITION OF SOIL GROUP NAMES (ASTM D2487) SYMBOL GROUP NAME

Coarse-Grained Soils More than 50% retained on No. 200 sieve

Gravels – More than 50% of coarse fraction retained on No. 4 sieve Coarse, ¾” to 3” Fine, No. 4 to ¾”

Clean Gravels Less than 5% fines

GW WELL GRADED

GRAVEL

GP POORLY GRADED

GRAVEL

Gravels with fines More than 12% fines

GM SILTY GRAVEL

GC CLAYEY GRAVEL

Sands – 50% or more of coarse Fraction passes No. 4 sieve Coarse, No. 10 to No. 4 Medium, No. 40 to No. 10 Fine, No. 200 to No. 40

Clean Sands Less than 5% fines

SW WELL GRADED

SAND

SP POORLY GRADED

SAND

Sands with fines More than 12% fines

SM SILTY SAND

SC CLAYEY SAND

Fine-Grained Soils 50% or more passes the No. 200 sieve

Silts and Clays – Liquid Limit less than 50 Low to medium plasticity

Inorganic CL LEAN CLAY

ML SILT

Organic OL ORGANIC CLAY

ORGANIC SILT

Silts and Clays – Liquid Limit 50 or more Medium to high plasticity

Inorganic CH FAT CLAY

MH ELASTIC SILT

Organic OH ORGANIC CLAY

ORGANIC SILT

Highly Organic Soils Primarily organic matter, dark in color and organic odor PT PEAT

II. DEFINITION OF SOIL COMPONENT PROPORTIONS (ASTM D2487)

Examples

Adjective Form

GRAVELLY

SANDY

>30% to <50% coarse grained component in a fine-grained soil

GRAVELLY LEAN CLAY

CLAYEY

SILTY

>12% to <50% fine grained component in a coarse-grained soil

SILTY SAND

“With” WITH GRAVEL

WITH SAND

>15% to <30% coarse grained component in a fine-grained soil

FAT CLAY WITH GRAVEL

WITH GRAVEL

WITH SAND

>15% to <50% coarse grained component in a coarse-grained soil

POORLY GRADED GRAVEL WITH SAND

WITH SILT

WITH CLAY

>5% to <12% fine grained component in a coarse-grained soil

POORLY GRADED SAND WITH SILT

III. GLOSSARY OF MISCELLANEOUS TERMS

SYMBOLS ............................ Unified Soil Classification Symbols are shown above as group symbols. A dual symbol “-“ indicates the soil belongs to two groups. A borderline symbol “/” indicates the soil belongs to two possible groups.

FILL ........................................ Man-made deposit containing soil, rock and often foreign matter.

PROBABLE FILL................... Soils which contain no visually detected foreign matter but which are suspect with regard to origin.

DISINTEGRATED ROCK

(DR)

Residual materials with a standard penetration resistance (SPT) between 60 blows per foot and refusal. Refusal is defined as a SPT of 100 blows for 2” or less penetration.

PARTIALLY WEATHERED

ROCK (PWR)

Residual materials with a standard penetration resistance (SPT) between 100 blows per foot and refusal. Refusal is defined as a SPT of 100 blows for 2” or less penetration.

BOULDERS & COBBLES ..... Boulders are considered rounded pieces of rock larger than 12 inches, while cobbles range from 3 to 12 inch size.

LENSES ................................. 0 to ½ inch seam within a material in a test pit.

LAYERS ................................. ½ to 12 inch seam within a material in a test pit.

POCKET ................................ Discontinuous body within a material in a test pit.

MOISTURE CONDITIONS ..... Wet, moist or dry to indicate visual appearance of specimen.

COLOR .................................. Overall color, with modifiers such as light to dark or variation in coloration.

CL

CH

-62.3

-64.3

0.0

2.0

S-01, SPT

WOR/24"

REC=24", 100%

S-02, SPT

WOR/24"

REC=24", 100%

S-03, SPT

WOR/24"

REC=24", 100%

S-04, SPT

WOR/24"

REC=24", 100%

S-05, SPT

WOR/24"

REC=24", 100%

S-06, SPT

WOR/24"

REC=24", 100%

S-07, SPT

WOR/24"

REC=24", 100%

S-08, SPT

WOR/24"

REC=24", 100%

60 ft of water

LEAN CLAY; wet, dark gray, few sand, contains mica

FAT CLAY; wet, dark gray, trace sand, contains mica

Change: contains shell fragments

ALLUVIUM

A1

LL = 39

PL = 17

MC = 45.5%

% Passing #200 = 90.4 PP <0.25 tsf PP <0.25 tsf

LL = 71

PL = 22

MC = 69.3%

% Passing #200 = 95.0 PP <0.25 tsf PP <0.25 tsf

PP <0.25 tsf

PP <0.25 tsf

MC = 68.7%

PP <0.25 tsf

PP = 0.25 tsf

Observed 6/15 1201 -2.3' Low Schnabel Representative: H. Marcin

Total Depth Below Mudline: 40.0 ft

Method: 2-15/16" O.D. Tri-cone Roller Bit

Equipment: CME-55 (ATV)

Mudline Elevation: -62.3 (ft)

Coordinate System: Lat-Long (Decimal Degrees)

Contractor: Fishburne Drilling, Inc.

Chesapeake, Virginia

Contractor Foreman: J. Rassio

Hammer Type: Auto Hammer (140 lb)

Dates Started: 6/15/22 Finished: 6/15/22

Latitude: 36.98245 Longitude: -76.32223 By: Handheld GPS

Tide Water Levels

Date Time Elev.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 1 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-01

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

/2

(continued)

SM

SC

SP-SM

-89.3

-94.3

-99.3

-102.3

27.0

32.0

37.0

40.0

S-09, SPT

2+1+4+4

REC=24", 100%

S-10, SPT

2+1+4+4

REC=24", 100%

S-11, SPT

8+9+7+6

REC=24", 100%

SILTY SAND, fine grained sand; wet, gray

CLAYEY SAND, fine to medium grained sand; wet, dark gray

POORLY GRADED SAND WITH SILT,

fine to medium grained sand; wet, dark gray

A1

A2

LL = 23

PL = 21

MC = 36.6%

% Passing #200 = 25.5

MC = 40.1%

% Passing #200 = 26.9

MC = 24.4%

% Passing #200 = 11.8

Bottom of Boring at 40.0 ft below the mudline.

Boring terminated at selected depth.

60 ft of water encountered at the boring location.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 2 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-01

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

/2

-61.00.0 S-01, SPT

WOR/24"

REC=0", 0%

S-02, SPT

WOR/24"

REC=0", 0%

S-01, SPT

WOR/24"

REC=24", 100%

S-02, SPT

WOR/24"

REC=24", 100%

S-03, SPT

WOR/24"

REC=6", 25%

S-04, SPT

WOR/24"

REC=10", 42%

S-05, SPT

WOR/24"

REC=8", 33%

S-06, SPT

WOR/24"

REC=24", 100%

62 ft of water

FAT CLAY; wet, gray, trace sand, contains mica, and shell fragments

Change: dark gray

ALLUVIUM

A1

PP <0.25 tsf

LL = 72

PL = 25

MC = 68.0%

% Passing #200 = 96.5 PP <0.25 tsf PP <0.25 tsf

LL = 65

PL = 23

MC = 67.3%

% Passing #200 = 97.9 PP = 0.25 tsf

PP = 0.25 tsf

PP = 0.25 tsf

Observed 6/14 1020 1.0' High Schnabel Representative: H. Marcin

Total Depth Below Mudline: 40.0 ft

Method: 2-15/16" O.D. Tri-cone Roller Bit

Equipment: CME-55 (ATV)

Mudline Elevation: -61.0 (ft)

Coordinate System: Lat-Long (Decimal Degrees)

Contractor: Fishburne Drilling, Inc.

Chesapeake, Virginia

Contractor Foreman: J. Rassio

Hammer Type: Auto Hammer (140 lb)

Dates Started: 6/14/22 Finished: 6/14/22

Latitude: 36.98194 Longitude: -76.32164 By: Handheld GPS

Tide Water Levels

Date Time Elev.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 1 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-02

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

/2

SC

SM

-88.0

-93.0

-98.0

-101.0

27.0

32.0

37.0

40.0

S-07, SPT

WOH/12"+2+4

REC=24", 100%

S-08, SPT

1+1+3+3

REC=24", 100%

S-09, SPT

1+1+3+2

REC=24", 100%

SANDY FAT CLAY; wet, dark gray, contains shell fragments

CLAYEY SAND, fine grained sand;

wet, dark gray, contains mica

SILTY SAND, fine grained sand; wet, gray

A1

A2

MC = 53.6%

% Passing #200 = 55.4 PP <0.25 tsf

LL = 43

PL = 18

MC = 51.1%

% Passing #200 = 49.0

MC = 34.5%

% Passing #200 = 25.1

Bottom of Boring at 40.0 ft below the mudline.

Boring terminated at selected depth.

62 ft of water encountered at the boring location.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 2 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-02

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

SC

-61.9

-63.9

0.0

2.0

S-01, SPT

WOR/24"

REC=12", 50%

S-02, SPT

WOR/24"

REC=24", 100%

S-03, SPT

WOR/24"

REC=24", 100%

S-04, SPT

WOR/24"

REC=24", 100%

S-05, SPT

WOR/24"

REC=24", 100%

S-06, SPT

WOR/24"

REC=24", 100%

S-07, SPT

WOR/24"

REC=0", 0%

S-08, SPT

WOR/12"+1+1

REC=24", 100%

60 ft of water

CLAYEY SAND, fine to medium grained sand; wet, dark gray, contains mica, and shell fragments

FAT CLAY; wet, dark gray, trace sand, contains mica, and shell fragments

ALLUVIUM

A2

A1

LL = 28

PL = 13

MC = 37.6%

% Passing #200 = 49.6 PP = 0.25 tsf

PP = 0.25 tsf

LL = 85

PL = 28

MC = 78.5%

% Passing #200 = 95.9 PP = 0.25 tsf PP = 0.25 tsf

PP = 0.25 tsf

PP = 0.25 tsf

Observed 6/15 901 -1.9' Low Schnabel Representative: H. Marcin

Total Depth Below Mudline: 40.0 ft

Method: 2-15/16" O.D. Tri-cone Roller Bit

Equipment: CME-55 (ATV)

Mudline Elevation: -61.9 (ft)

Coordinate System: Lat-Long (Decimal Degrees)

Contractor: Fishburne Drilling, Inc.

Chesapeake, Virginia

Contractor Foreman: J. Rassio

Hammer Type: Auto Hammer (140 lb)

Dates Started: 6/15/22 Finished: 6/15/22

Latitude: 36.98149 Longitude: -76.32103 By: Handheld GPS

Tide Water Levels

Date Time Elev.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 1 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-03

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

/2

SC-SM

SC

-88.9

-93.9

-101.9

27.0

32.0

40.0

S-09, SPT

WOH/12"+3+2

REC=24", 100%

S-10, SPT

WOH/24"

REC=24", 100%

S-11, SPT

1+1+1+3

REC=24", 100%

SILTY, CLAYEY SAND, fine grained sand; wet, gray

CLAYEY SAND, fine to coarse grained sand; wet, gray, trace gravel, contains mica, and shell fragments

A1

A2

LL = 26

PL = 20

MC = 39.7%

% Passing #200 = 45.7

LL = 34

PL = 14

MC = 40.9%

% Passing #200 = 46.9

Bottom of Boring at 40.0 ft below the mudline.

Boring terminated at selected depth.

60 ft of water encountered at the boring location.

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

SYMBOL

Contract Number: 22330030 Sheet: 2 of 2

SAMPLING

DEPTH

DEPTH

(ft)

ELEV

(ft)

TEST

BORING

LOG

Boring Number:

DATA

MATERIAL DESCRIPTION

B-03

REMARKS

Project:

STRA

TUM TESTS

T E

S T

B O

R

IN

G L

O G

N O

R F

O

LK

U E

M M

S .G

P J

S C

H N

A B

E L

D A

T A

T E

M P

LA

T

E

8_

_0

.G

D T

/1

APPENDIX B

SOIL LABORATORY TEST DATA

Summary of Laboratory Tests Gradation Curves Atterberg Limits

B-01

0.0 - 2.0

-62.3 - -64.3

Jar

LEAN CLAY (CL), few sand, contains mica, dark gray NN A1 45.5 39 17 22 90.4 -- --

B-01

4.0 - 6.0

-66.3 - -68.3

Jar

FAT CLAY (CH), trace sand, contains mica, dark gray NN A1 69.3 71 22 49 95.0 -- --

B-01

28.0 - 30.0

-90.3 - -92.3

Jar

SILTY SAND (SM), fine grained sand, gray

NN A2 36.6 23 21 2 25.5 100.0 --

B-01

33.0 - 35.0

-95.3 - -97.3

Jar

CLAYEY SAND (SC), fine to medium grained sand, dark gray {VISUAL} NN A2 40.1 -- -- -- 26.9 99.1 --

B-01

38.0 - 40.0

-100.3 - -102.3

Jar

POOLRY GRADED SAND WITH SILT

(SP-SM), fine to medium grained sand, dark gray

NN A2 24.4 -- -- -- 11.8 99.1 --

B-02

6.0 - 8.0

-67.0 - -69.0

Jar

FAT CLAY (CH), trace sand, contains mica and shell fragments, gray NN A1 68.0 72 25 47 96.5 -- --

B-02

13.0 - 15.0

-74.0 - -76.0

Jar

FAT CLAY (CH), trace sand, contains mica and shell fragments, dark gray NN A1 67.3 65 23 42 97.9 -- --

Sheet 1 of 2

Boring No.

Summary Of Laboratory Tests Appendix B

Description of Soil Specimen

Project Number: 22330030

Notes: 1. Soil tests in general accordance with ASTM standards.

2. Soil classifications are in general accordance with ASTM D2487(as applicable), based on testing indicated and visual classification.

3. Key to abbreviations: NP=Non-Plastic; -- indicates no test performed

Project:

Elevation ft

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Sample Type

Sample Depth ft

D Y

N A

M

IC

L A

B S

U M

M A

R Y

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G D

T

7/ 1/

S tr at u m

P la st ic

L im it

P as si n g

N o

S ie ve

L iq u id

L im it

P as si n g

N o

S ie ve

N at u ra l M o is tu re

P la st ic it y

In d ex

R et ai n ed

N o

S ie ve

T es ti n g L ab o ra to ry

B-02

28.0 - 30.0

-89.0 - -91.0

Jar

SANDY FAT CLAY (CH), contains shell fragments, dark gray {VISUAL} NN A1 53.6 -- -- -- 55.4 96.0 --

B-02

33.0 - 35.0

-94.0 - -96.0

Jar

CLAYEY SAND (SC), fine grained sand, contains mica, dark gray NN A2 51.1 43 18 25 49.0 100.0 --

B-02

38.0 - 40.0

-99.0 - -101.0

Jar

SILTY SAND (SM), fine grained sand, gray

{VISUAL} NN A2 34.5 -- -- -- 25.1 100.0 --

B-03

0.0 - 2.0

-61.9 - -63.9

Jar

CLAYEY SAND (SC), fine to medium grained sand, contains mica and shell fragments, dark gray

NN A2 37.6 28 13 15 49.6 85.9 --

B-03

6.0 - 8.0

-67.9 - -69.9

Jar

FAT CLAY (CH), trace sand, contains mica and shell fragments, dark gray NN A1 78.5 85 28 57 95.9 96.7 0.0

B-03

28.0 - 30.0

-89.9 - -91.9

Jar

SILTY, CLAYEY SAND (SC-SM), fine grained sand, gray NN A2 39.7 26 20 6 45.7 -- --

B-03

33.0 - 35.0

-94.9 - -96.9

Jar

CLAYEY SAND (SC), fine to coarse grained sand, trace gravel, contains shell fragments, gray

NN A2 40.9 34 14 20 46.9 70.6 4.2

Sheet 2 of 2

Boring No.

Summary Of Laboratory Tests Appendix B

Description of Soil Specimen

Project Number: 22330030

Notes: 1. Soil tests in general accordance with ASTM standards.

2. Soil classifications are in general accordance with ASTM D2487(as applicable), based on testing indicated and visual classification.

3. Key to abbreviations: NP=Non-Plastic; -- indicates no test performed

Project:

Elevation ft

Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Sample Type

Sample Depth ft

D Y

N A

M

IC

L A

B S

U M

M A

R Y

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G

S tr at u m

P la st ic

L im it

P as si n g

N o

S ie ve

L iq u id

L im it

P as si n g

N o

S ie ve

N at u ra l M o is tu re

P la st ic it y

In d ex

R et ai n ed

N o

S ie ve

T es ti n g L ab o ra to ry

0.0010.010.1110100

-- --0.25 0.0

LEAN CLAY (CL), few sand, contains mica, dark gray

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

6/23/22

U.S. SIEVE OPENING IN INCHES

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

90.4

D30

Sample Description

B-01 2217

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

0.0 ft

-- 9.6

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G

8/ fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 90.4

No. 200

98.6

No. 100

100.0

No. 60

0.0010.010.1110100

-- --0.25 0.0

FAT CLAY (CH), trace sand, contains mica, dark gray

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

95.0

D30

Sample Description

B-01 4922

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

4.0 ft

-- 5.0

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 95.0

No. 200

97.9

No. 100

0.0010.010.1110100

0.126 --0.425 0.0

SILTY SAND (SM), fine grained sand, gray

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

25.5

D30

Sample Description

B-01 221

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

28.0 ft

0.196 74.5

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 25.5

No. 200

31.5

No. 100

85.8

No. 60

No. 40

0.0010.010.1110100

0.127 --0.85 0.0

CLAYEY SAND (SC), fine to medium grained sand, dark gray

{VISUAL} --

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

26.9

D30

Sample Description

B-01 ----

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

33.0 ft

0.197 73.1

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 26.9

No. 200

31.0

No. 100

85.4

No. 60

99.1

No. 40

No. 20

0.0010.010.1110100

0.159 --0.85 0.0

POOLRY GRADED SAND WITH SILT (SP-SM), fine to medium grained sand, dark gray --

Specimen LL PL Cc

KPKR

Tested Date Reviewed ByTested By

Cu

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

11.8

D30

Sample Description

B-01 3.061.82----

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

38.0 ft

0.206 88.2

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 11.8

No. 200

23.4

No. 100

82.4

No. 60

99.1

No. 40

No. 20

0.0010.010.1110100

-- --0.25 0.0

FAT CLAY (CH), trace sand, contains mica and shell fragments, gray 72

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

96.5

D30

Sample Description

B-02 4725

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

6.0 ft

-- 3.5

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 96.5

No. 200

98.1

No. 100

0.0010.010.1110100

-- --0.15 0.0

FAT CLAY (CH), trace sand, contains mica and shell fragments, dark gray 65

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

97.9

D30

Sample Description

B-02 4223

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

13.0 ft

-- 2.1

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 97.9

No. 200

No. 100

0.0010.010.1110100

-- --2 0.0

SANDY FAT CLAY (CH), contains shell fragments, dark gray

{VISUAL} --

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

55.4

D30

Sample Description

B-02 ----

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

28.0 ft

0.12 44.6

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 55.4

No. 200

62.2

No. 100

89.1

No. 60

96.0

No. 40

98.5

No. 20

No. 10

0.0010.010.1110100

-- --0.425 0.0

CLAYEY SAND (SC), fine grained sand, contains mica, dark gray 43

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

49.0

D30

Sample Description

B-02 2518

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

33.0 ft

0.152 51.0

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 49.0

No. 200

59.0

No. 100

99.1

No. 60

0.0010.010.1110100

0.095 --0.425 0.0

SILTY SAND (SM), fine grained sand, gray {VISUAL}

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

25.1

D30

Sample Description

B-02 ----

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

38.0 ft

0.179 74.9

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 25.1

No. 200

39.7

No. 100

98.3

No. 60

0.0010.010.1110100

-- --2 0.0

CLAYEY SAND (SC), fine to medium grained sand, contains mica and shell fragments, dark gray 28

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

49.6

D30

Sample Description

B-03 1513

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

0.0 ft

0.158 50.4

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 49.6

No. 200

58.1

No. 100

77.8

No. 60

85.9

No. 40

95.7

No. 20

No. 10

0.0010.010.1110100

-- --4.75 0.0

FAT CLAY (CH), trace sand, contains mica and shell fragments, dark gray 85

Specimen LL PL

KPKR

Tested Date Reviewed ByTested By

4 14

U.S. SIEVE NUMBERS

501/23/8 4023 3/4

HYDROMETER

GRADATION CURVE

16 20 3016 4 3

GRAIN SIZE IN MILLIMETERS

Test Method %Silt %Clay

ASTM D422

PI

D10 %Gravel %Sand

95.9

D30

Sample Description

B-03 5728

D100 D60

1.5 6

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

100 14060

6.0 ft

-- 4.1

Testing Lab: NN

Percent Finer

Project: Norfolk UEMMS Norfolk Harbor Entrance Reach Channel Norfolk, Virginia

Contract: 22330030S

IE

V E

/S

H E

E T

N

O R

F O

LK

U

E M

M S

.G P

J S

C H

N A

B E

L D

A T

A T

E M

P

LA

T E

0_

_2

.G fine coarse

COBBLES SILT OR CLAY

medium fine

SANDGRAVEL

coarse

Sieve Size

% Finer 95.9

No. 200

96.3

No. 100

96.5

No. 60

96.7

No. 40

97.1

No.