Analytical Test Results and Location Plan.pdf

MW-B

9.82

MW-BG01

10.73

MW-BG04

20.42

MW-BG05

17.76

MW-BG06

11.99

MW-BG07

11.55

MW-BG09

11.5

MW-BG10

10.41

MW-BG11

9.22

MW-BG12

13.58

MW-BG13

12.66

OC-MW01

9.44

OC-MW02

12.77

OC-MW03

9.18

OC-MW04

10.1

OW11-MW1

11.13

OW11-MW4

11.53

OW11-MW5

11.51

OW11-MW6

11.35

OW11-MW7

11.15

OW11-MW8

10.76

OW11-MW9

10.52

OW26-MW1

13.67

OW2B-MW41

14.73

OW2C-MW19

12.66

OW2E-MW19

14.45

203MW-19

OC-MW07

MW4 near fuel tank

Hush House

Crash in Woods

Aircraft Hangars and Maintenance Buildings

Approximate Location of 1986 Plane Crash on Oceana Blvd

Site 11

SWMU 26

2007 Civilian Plane Crash

POL Tank Farm

OW2E-MW19

14.45

OW2E-MW19

14.45

OW2E-MW19

14.45

OW2E-MW19

14.45

US HWY 58

BIRDNECK RD

S T A

T E

H W

Y

POTTERS RD

BELLS RD

N B

IR

D

N E

C K

R D

S T A

T E

H W

Y

NORFOLK AVE

S T A

T E

H W

Y

S T A

T E

H W

Y

S B

IR

D

N E

C K

R D

US HWY 58 BUS

I 264

DAM NECK RD

Figure 4-1 COCs Concentrations in the Columbia Aquifer

Basewide Per- and Polyfluoroalkyl Substances Site Inspection Report NAS Oceana, Virginia Beach, Virginia

0 1,500 3,000750

Feet

R:\ENBG\00_Proj\N\Navy\CLEAN\MIDLANT\NASOceana\MapFiles\Basewide\678440_PFAS_SI\Figure_4-1_PFOS_PFOA_Detections_Columbia_Aquifer.mxd6/11/2018bmailhes

Legend

!? Monitoring Wells with PFOS/PFOA Detections

!? Monitoring Wells with PFOS/PFOA Exceedances

!? Monitoring Wells with No PFOS/PFOA Detections

Non-Core Target Treatment Area (2004)

Core Target Treatment Area (2004) (Core)

Direction of Groundwater Flow

Groundwater Elevation Contour - November 2017 (dashed where inferred)

Sampling Area

Potential AFFF Release Areas

Installation Boundary

Imagery Source: Esri, 2017

PFOA 11,600

PFOS 217,000 J

Total PFOA/PFOS 228,600

10/25/2016

OW11-MW1

PFOA 1,540

PFOS 33,200 J

Total PFOA/PFOS 34,740

OW11-MW4

10/26/2016

PFOA 4,100

PFOS 69,500 J

Total PFOA/PFOS 73,600

OW11-MW5

10/25/2016

PFOA 11,300

PFOS 101,000 J

Total PFOA/PFOS 112,300

OW11-MW6

10/26/2016

PFOA 18,700

PFOS 296,000 J

Total PFOA/PFOS 314,700

OW11-MW7

10/25/2016

PFOA 5,360

PFOS 18,800

Total PFOA/PFOS 24,160

OW11-MW8

10/25/2016

PFOA 10,100

PFOS 116,000 J

Total PFOA/PFOS 126,100

OW11-MW9*

10/25/2016

PFOA 22,600

PFOS 471,000

Total PFOA/PFOS 493,600

OW26-MW1*

11/1/2016

PFOA 4.92 J

PFOS 8.16 J

Total PFOA/PFOS 13.08

OC-MW01

11/1/2016

PFOA 15.6

PFOS 33.4

Total PFOA/PFOS 49

OC-MW03

11/1/2016

PFOA 12.6

PFOS 4,020

Total PFOA/PFOS 4,032.6

JTC-MW-B

11/1/2016

PFOA 6.84 J

PFOS 39.6

Total PFOA/PFOS 46.44

OC-MW04

10/31/2016

PFOA 413

PFOS 263

Total PFOA/PFOS 676

OW2E-MW19

11/1/2016

PFOA 222

PFOS 63.1

Total PFOA/PFOS 285.1

OW2B-MW41

11/1/2016

PFOA 5.75 J

PFOS 7.17 J

Total PFOA/PFOS 12.92

203MW-19

11/1/2016

OC-MW02

11/1/2016

No Detections

PFOA 13.5

PFOS 20.2

Total PFOA/PFOS 33.7

MW-BG01

10/31/2016

PFOA 2.02 J

MW-BG05*

10/28/2016

PFOS 11.4

MW-BG06

10/28/2016

PFOA 1.65 J

PFOS 29.2

Total PFOA/PFOS 30.85

MW-BG07

10/28/2016

PFOA 3.15 J

MW-BG09

10/31/2016

PFOS 1.23 J

MW-BG10

11/2/2016

PFOS 15.6

MW-BG11

10/31/2016

PFOA 10.2

PFOS 46.5

Total PFOA/PFOS 56.7

MW-BG12

10/26/2016

PFOS 28.7

MW-BG13*

10/26/2016

Total PFOS/PFOA 70

USEPA

Lifetime

Health

Advisory

Notes:

All units are ng/L (nanograms per liter) J - Estimated result

* - Field duplicate collected at this location; the greater of the results is shown Bold text indicates a detection Shading indicates exceedance of the USEPA Lifetime Health Advisory

No Detections

OC-F8F9-MW-F4

4/4/2017

PFOA 0.685 J

PFOS 3.63 J

Total PFOA/PFOS 4.315

OC-MW07

4/4/2017

PFOA 1100

PFOS 44,500 J

Total PFOA/PFOS 45,600

OW2C-MW25

2/23/2017

PFOA 42.9

PFOS 249

Total PFOA/PFOS 292

OW2C-MW05

2/23/2017

PFOA 134

PFOS 103

Total PFOA/PFOS 237

OW2E-MW09R

2/23/2017

PFOA 546 268

PFOS 2,430 1,340

Total PFOA/PFOS 2,976 1,608

2/23/201711/1/2016

OW2C-MW19

PFOA 1540

PFOS 78.7

Total PFOA/PFOS 1,619

OW2C-MW24

2/23/2017

PFOA 4.72 J

MW-BG04R

8/10/2017

Firefighter

FirefighterFirefighter Training Areas

Site 11

CJ

CJ

c'12fflt

"S"S

"S

"S "S

"S "S

"S

"S

"S

PFAS AOC 2 -

NORTHEASTERN

RUNWAY AREA

RUNWAY

5L-23R/RUNWAY

5R-23L NORTH

RUNWAY

14L-32R/RUNWAY

14R-32L EAST

HANGAR 200

HANGAR 56

NORTH STATION

LANDFILL

HANGAR 111

HANGAR 122

FIREFIGHTING

TRAINING

AREA

BUILDING

220 FIRE

STATION AREA

FITWING

RUNWAY

14L-32R/RUNWAY

14R-32L WEST

RUNWAY

5L-23R/RUNWAY

5R-23L SOUTH

PFAS AOC 1 - FIRE

TRAINING AREA AND

NORTHWESTERN

RUNWAY AREA

PFAS AOC 3

- AIRCRAFT

MAINTENANCE AREA

OC-SO22

OCAG-SO07

OC-SO21

OCAG-SO08

OCAG-SO06

OC-SO29

OC-SO30

OC-SO32

OC-SO33

OC-SO31

OCEANA BLVD

FIRST COLONIAL RD

POTTERS RD

OPERATIONS DR

SLUDGE RD

CREDLE R

D

O

CEANA B

LVD

O

CEANA

BLVD

BELLS RD

O C

EAN

A BLVD

O

CEANA

BLVD

O

CEANA BLVD

O

CEANA BLVD

O

CEANA

BLVD

O

CEANA BLVD

O

CEANA BLVD

NA

VY

R D

O

CEANA BLVD

OPERATIONSDR

O

CEA

NA B

LVD

M

ITCH

ER BLVD

O

CEA

NA B

LVD

FIRST COLONIAL ROAD SOUTH

OCEANA BLVD

Figure 4-5a AOC 2 - Soil Results

NAS Oceana Virginia Beach, Virginia/

0 625312.5 Feet

\\dc1vs01\GISNavyClean\MIDLANT\NASOceana\MapFiles\Basewide\PFAS\678440_SI_Addendum\Figure_4-5a_AOC2_Soil_Results.mxd4/5/2023PAYNEM

Legend "S Agricultural Lease Soil Sample Location "S Surface Soil and Subsurface Soil Sample Location

_̂ Potential PFAS Release Location (Investigated During SI Addendum) Columbia Aquifer Groundwater Flow Direction (September 14, 2020) PFAS Area of Concern 2 Potential PFAS Release Area (Investigated During SI Addendum) Other PFAS Area of Concern Boundary Other Potential PFAS Release Area Boundary

Agricultural Lease Area Installation Boundary

Imagery: Esri, 2021

Screening Criteria Residential Soil RSL

Perfluorooctane Sulfonate (PFOS) 19 Perfluorooctanoic acid (PFOA) 13 Perfluorobutane sulfonate (PFBS) 1,900 Perfluorohexanesulfonic acid(PFHxS) 130 Perfluorononanoic acid (PFNA) 19 Perfluoro-2-methyl-3-oxahexanoic acid (HFPO-DA) 23

Notes:

Bold indicates detections

* A duplicate sample was collected at this depth interval. The higher of the two concentrations are shown.

All results are in µg/kg (micrograms per kilogram) J - analyte present, value may or may not be accurate or precise U - material was analyzed for, but not detected RSLs are based on November 2022 EPA RSL, HQ = 0.1.

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 1.35.U 1.12 U

PFOA 1.35 U 1.12 U

PFBS 1.35 U 0.56 U

PFHxS 0.68 U 1.12 U

PFNA 1.35 U 1.12 U

HFPO-DA 2.7 U 2.23 U

OC-SO21

08/06/19

Station ID Sample Type surface soil subsurface soil* Sample Date

PFOS 7.62 7.77

PFOA 0.84 J 0.69 J

PFBS 1.23 U 1.08 U

PFHxS 0.62 U 0.54 U

PFNA 1.23 U 1..08 U

HFPO-DA 2.47 U 2.15 U

OC-SO22

08/06/19

Station ID Sample Type surface soil subsurface soil* Sample Date

PFOS 0.777 J 0.86 J

PFOA 0.602 J 0.52 J

PFBS 0.5 U 0.5 U

PFHxS 0.659 J 0.52 J

PFNA 0.5 U 0.5 U

HFPO-DA 0.5 U 0.5 U

OC-SO29

09/28/22

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 0.499 U 0.5 U

PFOA 0.449 U 0.5 U

PFBS 0.449 U 0.5 U

PFHxS 0.449 U 0.5 U

PFNA 0.449 U 0.5 U

HFPO-DA 0.499 U 0.5 U

09/28/22

OC-SO30

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 1.34 0.851 J

PFOA 1.85 1.29

PFBS 0.5 U 0.5 U

PFHxS 0.531 J 0.272 J

PFNA 0.205 J 0.5 U

HFPO-DA 0.5 U 0.5 U

OC-SO31

09/28/22

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 1.37 0.388 J

PFOA 0.655 J 0.308 J

PFBS 0.5 U 0.499 U

PFHxS 0.382 J 0.387 J

PFNA 0.278 J 0.499 U

HFPO-DA 0.5 U 0.499 U

OC-SO32

09/27/22

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 0.501 U 0.502 U

PFOA 0.501 U 0.502 U

PFBS 0.501 U 0.502 U

PFHxS 0.206 J 0.502 U

PFNA 0.501 U 0.502 U

HFPO-DA 0.501 U 0.502 U

OC-SO33

09/27/22

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 13.69 16.09

PFOA 0.77 J 1.17 J

PFBS 1.12 U 1.18 U

PFHxS 2.25 U 2.35 U

PFNA 1.12 U 0.77 J

HFPO-DA 2.25 U 2.35 U

OCAG-SO06

03/11/20

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 2.55 J 1.43 J

PFOA 2.44 U 0.8 J

PFBS 1.22 U 1.2 U

PFHxS 2.44 U 2.4 U

PFNA 1.22 U 1.2 U

HFPO-DA 2.44 U 2.4 U

03/11/20

OCAG-SO07

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 4.74 J 3.63 J

PFOA 2.48 U 0.85 J

PFBS 1.24 U 1.17 U

PFHxS 2.48 U 2.34 U

PFNA 1.24 U 1.17 U

HFPO-DA 2.48 U 2.34 U

OCAG-SO08

03/11/20

INTERNAL DELIBERATIVE - DO NOT DISTRIBUTE

+U

+U

+U

+U

+U

+U

+U

+U

+U +U

+U

+U

+U

+U

+U

+U

+U

+U

+U

+U

+U

+U

+U +U

+U

PFAS AOC 2 -

NORTHEASTERN

RUNWAY AREA

RUNWAY

5L-23R/RUNWAY

5R-23L NORTH

RUNWAY

14L-32R/RUNWAY

14R-32L EAST

HANGAR 200

HANGAR 56

NORTH STATION

LANDFILL

HANGAR 111

HANGAR 122

BUILDING

220 FIRE

STATION AREA

PFAS AOC 1 - FIRE

TRAINING AREA AND

NORTHWESTERN

RUNWAY AREA

PFAS AOC 3

- AIRCRAFT

MAINTENANCE AREA

HANGAR 145HANGAR

HANGAR 137

HANGAR 223

HANGAR

RUNWAY 5L-23R/

RUNWAY 5R-23L SOUTH

RUNWAY 14L-32R/

RUNWAY 14R-32L

WEST

OC-MW02

OC-MW08

OC-MW09

OC-MW26

OC-MW28

MW-BG04R

OC-MW10

OC-MW11

OC-MW22

OC-MW24

OC-MW01

OC-MW02D

OC-MW11D

OC-MW24D

OC-MW26D

OC-MW10D

OC-MW09D

OC-MW08D

OC-MW22D

OC-MW23D

OC-MW31

OC-MW32

OC-MW29

OC-MW30

OC-MW33

OC-MW23D

MW-BG04R

FIRST COLONIAL RD

E A V

TOMCAT BLVD

3RD ST

4TH ST

POTTERS RD

OPERATIONS DR

D AV

CR

ED

LE R

D

1ST ST

O C

EA

NA BLVD

O C

EA

NA BLVD

F A V

O

CEANA B

LVD

O

CEANA B

LVD

OCEANA BLVD

HORNET D

R

O C

EA

NA B

LVD

O

CEA

NA B

LVD

O

CEANA

BLVD

O

CEANA

BLVD

1ST ST

O

CEA

NA B

LVD

O C

EANA BLVD

O C

EANA BLVD

O

CEA

NA BLVD

OPERATIONSDR

O C

EA

NA B

LVD

O

CEANA BLVD

OCEANA BLVD

B AV

BELLS RD

M

ITCH

ER BLVD

O

CEAN

A BLVD

FIRST COLONIAL ROAD SOUTH

Figure 4-5b AOC 2 - Groundwater Results

NAS Oceana Virginia Beach, Virginia/

0 600300 Feet

\\dc1vs01\GISNavyClean\MIDLANT\NASOceana\MapFiles\Basewide\PFAS\678440_SI_Addendum\Figure_4-5b_AOC2_GW_Results.mxd4/7/2023PAYNEM

Legend +U Columbia Aquifer Monitoring Well Location (Shallow; Sampled) +U Yorktown Monitoring Well Location (Deep, Sampled)

_̂ Potential PFAS Release Location (Investigated During SI Addendum) Columbia Aquifer Groundwater Flow Direction (September 14, 2020) PFAS Area of Concern 2 Potential PFAS Release Area (Investigated During SI Addendum) Other PFAS Area of Concern Boundary Other Potential PFAS Release Area Boundary

Agricultural Lease Area Installation Boundary

Imagery: Esri, 2021

Notes:

Shading indicates exceedance of Groundwater RSL Bold indicates detections

* A duplicate sample was collected and the higher of the two concentrations are shown All groundwater results are shown in ng/L (nanograms per liter) or ppt (parts per trillion) J - analyte present, value may or may not be accurate or precise NA - not analyzed U - material was analyzed for, but not detected UJ - analyte note detected, quantitation limit may be inaccurate RSLs are based on November 2022 EPA RSL, HQ = 0.1.

Screening Criteria Tapwater RSL Perfluorooctane Sulfonate (PFOS) 6 Perfluorooctanoic acid (PFOA) 4 Perfluorobutane sulfonate (PFBS) 600 Perfluorohexanesulfonic acid(PFHxS) 39 Perfluorononanoic acid (PFNA) 5.9 Perfluoro-2-methyl-3-oxahexanoic acid (HFPO-DA) 6

Station ID OC-MW30 Sample Type groundwater Sample Date 10/05/22

PFOS 30.2

PFOA 13.9

PFBS 3.31 J

PFHxS 3.72 J

PFNA 5.39

HFPO-DA 2.38 U

Station ID MW-BG04 Sample Type groundwater Sample Date 10/28/16

PFOS 1.61 U

PFOA 1.91 U

PFBS 3.82 U

PFHxS 1.1 J

PFNA 1.91 U

HFPO-DA NA

Station ID Sample Type Sample Date 08/10/17 06/10/19

PFOS 5.39 U 0.46 U

PFOA 4.72 J 6.0

PFBS 8.67 9.67

PFHxS 28.3 24.84

PFNA 5.39 U 0.93 U

HFPO-DA NA 0.37 U

MW-BG04

groundwater

Station ID OC-MW28 Sample Type groundwater Sample Date 06/26/19

PFOS 3 U

PFOA 1.59 U

PFBS 0.81 J

PFHxS 1.51 J

PFNA 0.42 J

HFPO-DA 0.34 U

Station ID OC-MW32 Sample Type groundwater Sample Date 10/05/22

PFOS 26.8

PFOA 17.4

PFBS 1.29 J

PFHxS 24.2

PFNA 1.39 J

HFPO-DA 2.42 U Station ID OC-MW33

Sample Type groundwater Sample Date 10/05/22

PFOS 2.43 U

PFOA 2.43 U

PFBS 2.43 U

PFHxS 2.43 U

PFNA 2.43 U

HFPO-DA 2.43 U

Station ID OC-MW11 Sample Type groundwater Sample Date 08/14/19

PFOS 2.59 J

PFOA 44.41

PFBS 12.14 J

PFHxS 28.29

PFNA 0.26 J

HFPO-DA 0.36 UJ

Station ID OC-MW11D Sample Type groundwater Sample Date 08/14/19

PFOS 0.46 U

PFOA 0.67 U

PFBS 0.46 UJ

PFHxS 0.21 J

PFNA 0.93 U

HFPO-DA 0.37 UJ

Station ID OC-MW23 Sample Type groundwater Sample Date 08/12/19*

PFOS 2.15 J

PFOA 70.39

PFBS 1.04 J

PFHxS 2.76 J

PFNA 0.36 J

HFPO-DA 0.36 U

Station ID OC-MW23D Sample Type groundwater Sample Date 08/14/19

PFOS 2.3 J

PFOA 119.39

PFBS 1.78 J

PFHxS 2.53 J

PFNA 0.47 J

HFPO-DA 0.36 U

Station ID OC-MW24 Sample Type groundwater Sample Date 08/12/19

PFOS 3.91 J

PFOA 68.5

PFBS 137.5

PFHxS 30.34

PFNA 0.93 U

HFPO-DA 1.19 J

Station ID OC-MW24D Sample Type groundwater Sample Date 08/14/19

PFOS 10.5

PFOA 6.47

PFBS 0.46 U

PFHxS 5.36

PFNA 0.89 J

HFPO-DA 0.37 U

Station ID OC-MW26 Sample Type groundwater Sample Date 08/14/19

PFOS 0.45 U

PFOA 0.45 U

PFBS 0.45 U

PFHxS 0.11 J

PFNA 0.91 U

HFPO-DA 0.36 U

Station ID OC-MW26D Sample Type groundwater Sample Date 08/14/19

PFOS 0.25 J

PFOA 1.39 U

PFBS 0.5 J

PFHxS 0.83 J

PFNA 0.93 U

HFPO-DA 0.37 U

Station ID OC-MW29 Sample Type groundwater Sample Date 10/05/22

PFOS 5.64

PFOA 4.25 J

PFBS 2.4 U

PFHxS 8.6

PFNA 2.4 U

HFPO-DA 2.4 U

Station ID OC-MW31 Sample Type groundwater Sample Date 10/05/22

PFOS 42

PFOA 46.9

PFBS 3.22 J

PFHxS 42.8

PFNA 2.43 U

HFPO-DA 2.43 U

Station ID Sample Type Sample Date 11/01/15 06/12/19

PFOS 8.16 J 11.68

PFOA 4.92 J 8.49

PFBS 4.13 J 7.72

PFHxS 19.4 13.41

PFNA 1.76 J 1.26 J

HFPO-DA NA 0.38 U

OC-MW01

groundwater

Station ID Sample Type Sample Date 11/01/16 06/18/19

PFOS 0.907 U 0.47 U

PFOA 2.02 U 0.47 UJ

PFBS 4.03 U 0.47 U

PFHxS 2.02 U 0.38 U

PFNA 2.02 U 0.94 UJ

HFPO-DA NA 0.38 UJ

OC-MW02

groundwater

Station ID Sample Type Sample Date 04/03/17 06/18/19

PFOS 0.922 U 1.27 U

PFOA 8.98 4.89

PFBS 4.1 U 0.26 J

PFHxS 10 4.05 J

PFNA 2.05 U 0.93 U

HFPO-DA NA 0.37 UJ

OC-MW02D

groundwater

Station ID OC-MW08 Sample Type groundwater Sample Date 08/14/19

PFOS 0.2 J

PFOA 0.96 U

PFBS 1.03 J

PFHxS 1.23 J

PFNA 0.91 U

HFPO-DA 0.36 U

Station ID OC-MW08D Sample Type groundwater Sample Date 08/14/19

PFOS 0.21 J

PFOA 0.45 U

PFBS 0.45 UJ

PFHxS 0.36 U

PFNA 0.91 U

HFPO-DA 0.2 J

Station ID OC-MW09 Sample Type groundwater Sample Date 08/12/19

PFOS 5.58

PFOA 11.18 J

PFBS 1.51 J

PFHxS 14.93

PFNA 0.52 J

HFPO-DA 0.35 U

Station ID OC-MW09D Sample Type groundwater Sample Date 08/14/19*

PFOS 0.47 J

PFOA 14.1

PFBS 2.57 J

PFHxS 30.63

PFNA 0.94 U

HFPO-DA 0.38 U

Station ID OC-MW010 Sample Type groundwater Sample Date 08/12/19

PFOS 88.53

PFOA 41.96

PFBS 40.59

PFHxS 90.04

PFNA 2.32 J

HFPO-DA 0.38 U

Station ID OC-MW010D Sample Type groundwater Sample Date 08/12/19

PFOS 0.47 J

PFOA 0.49 U

PFBS 0.49 U

PFHxS 0.15 J

PFNA 0.98 U

HFPO-DA 0.39 U

Station ID OC-MW22 Sample Type groundwater Sample Date 08/12/19

PFOS 52.34

PFOA 6.54 J

PFBS 3.86 J

PFHxS 9.91

PFNA 1.45 J

HFPO-DA 0.4 UJ

Station ID OC-MW22D Sample Type groundwater Sample Date 08/12/19

PFOS 1.14 J

PFOA 0.8 U

PFBS 0.45 U

PFHxS 0.33 J

PFNA 0.89 U

HFPO-DA 0.36 U

"S

"S

"S

"S

"S "S

"S

"S

"S

PFAS AOC 3

- AIRCRAFT

MAINTENANCE AREA

HANGAR 404

BUILDING 830

HANGAR 200

HANGAR 56

HANGAR 111

HANGAR 122

HANGAR 137

HANGAR 139 HANGAR 145

HANGAR 500

JET TEST

CELL AREA

CALA

HANGAR 223

BUILDING

220 FIRE

STATION AREA

BUILDING

543/546 AREA

FITWING

RUNWAY

5L-23R/RUNWAY

5R-23L SOUTH

FIFTH

GREEN

LANDFILL

FUEL TANK

FARM (OLD)

NORTH

STATION

LANDFILL

FUEL TANK

FARM (NEW)

FIREFIGHTING

TRAINING

AREA

RUNWAY

5L-23R/RUNWAY

5R-23L NORTH

RUNWAY

14L-32R/RUNWAY

14R-32L EAST

PFAS AOC 1 - FIRE

TRAINING AREA AND

NORTHWESTERN

RUNWAY AREA PFAS AOC 2 -

NORTHEASTERN

RUNWAY AREA

OCAG-SO16

JTC-SO01OCAG-SO14

OCAG-SO17

OW2B-SO18

OCAG-SO05

OW26-SO04

OCAG-SO04

OCAG-SO15

NA

VY

RD

DEW

EY

RD

MAGAZINE DR

TOMCAT BLVD

E A V

MAGAZIN

E D

R

5TH ST

LASER RD

4TH ST

OPERATIONS DR

WEAPONS RD

D AV

PAUL JONES CIR

E AV

DECATURDR(ABANDONED)

9TH ST

HORNET D

R

1ST ST

F A V

NIMITZ DR

HARPERS RD

F A V

O

CEANA B

LVD

O

CEANA BLVD

G

AV

3R

D S T

TOMCAT BLVD

HARPERS RD

N

AVY RD

8TH ST

7TH ST

3RD ST

6TH ST

1ST ST

LE

YTE C

T

LO

NDO

N

BRIDG

E

RD

PHANTO

M

BLVD

N

AVY R

D

IN

TER

NATIO

NAL P

KW

Y

B AV

LONDON BRIDGE RD

LO

ND

O N

B

RI

DG

E

RD

FIRST COLONIAL ROAD SOUTH

IN

TER

NATIO

NAL P

KW

Y

10TH ST

TO

MCAT

B

LV

D

LO

NDO

N

BRIDG

E

RD

Figure 4-6a AOC 3 - Soil Results

NAS Oceana Virginia Beach, Virginia/

0 825412.5 Feet

\\dc1vs01\GISNavyClean\MIDLANT\NASOceana\MapFiles\Basewide\PFAS\678440_SI_Addendum\Figure_4-6a_AOC3_Soil_Results.mxd4/5/2023PAYNEM

Legend "S Agricultural Lease Soil Sample Location "S Surface Soil and Subsurface Soil Sample Location

_̂ Potential PFAS Release Location (Investigated During SI Addendum) Columbia Aquifer Groundwater Flow Direction (September 14, 2020) PFAS Area of Concern 3 Potential PFAS Release Area (Investigated During SI Addendum) Other PFAS Area of Concern Boundary Other Potential PFAS Release Area Boundary

Agricultural Lease Area Installation Boundary

Imagery: Esri, 2021

Notes:

Shading indicates exceedance of Soil RSL Bold indicates detections All results are in µg/kg (micrograms per kilogram) J - analyte present, value may or may not be accurate or precise U - material was analyzed for, but not detected RSLs are based on November 2022 EPA RSL, HQ = 0.1.

Screening Criteria Residential Soil RSL

Perfluorooctane Sulfonate (PFOS) 19 Perfluorooctanoic acid (PFOA) 13 Perfluorobutane sulfonate (PFBS) 1,900 Perfluorohexanesulfonic acid(PFHxS) 130 Perfluorononanoic acid (PFNA) 19 Perfluoro-2-methyl-3-oxahexanoic acid (HFPO-DA) 23

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 13.12 U 18.27 U

PFOA 1.17 J 2.28 J

PFBS 1.17 U 1.15 U

PFHxS 1.94 J 5.37 J

PFNA 0.85 J 1.51 J

HFPO-DA 2.34 U 2.3 U

OW2B-SO18

06/06/19

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 540.74 5,095.6

PFOA 9.63 167.66

PFBS 0.88 J 1.35 J

PFHxS 18.04 64.47

PFNA 19.77 46.27

HFPO-DA 2.35 U 2.56 U

OW26-SO04

06/06/19

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 2.35 U 2.6 U

PFOA 2.35 U 2.6 U

PFBS 1.18 U 1.3 U

PFHxS 2.35 U 2.6 U

PFNA 1.18 U 1.3 U

HFPO-DA 2.35 U 2.6 U

03/12/20

OCAG-SO14

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 8.11 5.05 J

PFOA 3.33 U 2.67 U

PFBS 1.21 U 1.33 U

PFHxS 2.42 U 2.67 U

PFNA 1.21 U 1.33 U

HFPO-DA 2.42 U 2.67 U

OCAG-SO15

03/12/20

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 3.52 J 10.13

PFOA 2.38 U 2.53 U

PFBS 1.19 U 1.27 U

PFHxS 2.38 U 2.53 U

PFNA 1.19 U 1.27 U

HFPO-DA 2.38 U 2.53 U

OCAG-SO16

03/12/20

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 14.77 5.04 J

PFOA 1 J 1.87 J

PFBS 1.25 U 1.12 U

PFHxS 2.5 U 2.23 U

PFNA 0.62 J 1.12 U

HFPO-DA 2.5 U 2.23 U

OCAG-SO17

03/12/20

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 7.91 5.72

PFOA 0.61 J 0.86 J

PFBS 1.17 U 1.14 U

PFHxS 2.73 J 1.76 J

PFNA 1.17 U 1.14 U

HFPO-DA 2.34 U 2.29 U

JTC-SO01

06/05/19

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 14.79 10.73

PFOA 2.88 U 3.08 J

PFBS 1.44 U 1.32 U

PFHxS 2.88 U 2.63 U

PFNA 1.44 U 0.74 J

HFPO-DA 2.88 U 2.63 U

OCAG-SO04

03/11/20

Station ID Sample Type surface soil subsurface soil Sample Date

PFOS 14.66 10.33

PFOA 4.21 J 0.84 J

PFBS 1.38 U 1.26 U

PFHxS 2.76 U 2.52 U

PFNA 0.78 J 1.26 U

HFPO-DA 2.76 U 2.52 U

03/11/20

OCAG-SO05

+U

+U

!+U +U

+U

+U

+U

+U

+U +U

+U

+U

+U

!+U+U

+U

+U

+U

+U

+U

!+U

+U

+U +U

!+U

+U

+U

+U

+U

+U

+U+U

+U

+U

+U

+U

+U

+U

!+U

!+U

+U

+U

!+U

+U

+U

+U

+U

+U +U

+U

+U

PFAS AOC 3

- AIRCRAFT

MAINTENANCE AREA

HANGAR 404

BUILDING 830

HANGAR 200

HANGAR 56

HANGAR 111

HANGAR 122

HANGAR 137

HANGAR 139 HANGAR 145

HANGAR 500

JET TEST

CELL AREA

CALA

HANGAR 223

BUILDING

220 FIRE

STATION AREA

BUILDING

543/546 AREA

FITWING

RUNWAY

5L-23R/RUNWAY

5R-23L SOUTH

FIFTH

GREEN

LANDFILL

FUEL TANK

FARM (OLD)

NORTH

STATION

LANDFILL

FUEL TANK

FARM (NEW)

FIREFIGHTING

TRAINING

AREA

RUNWAY

5L-23R/RUNWAY

5R-23L NORTH

RUNWAY

14L-32R/RUNWAY

14R-32L EAST

PFAS AOC 1 - FIRE

TRAINING AREA AND

NORTHWESTERN

RUNWAY AREA PFAS AOC 2 -

NORTHEASTERN

RUNWAY AREA

JTC-MW-B

MW-BG06

NEX-MW-C

NEX-MW13

OC-MW03

OC-MW14

OC-MW15

OC-MW21

OW26-MW1

OW2B-MW41

OW2C-MW19

OW2C-MW24

OW2E-MW19

DT-03

DT-MW-02

MW-BG07

MW-BG11

OC-MW04

OC-MW17

OW24-MW11

OW2B-MW14

OW2B-MW50

OW2B-MW53

OW2C-MW25

OW2E-MW18

MW-BG10

OC-MW07

OC-MW16

OC-MW19

OC-MW27

OW2B-MW51

OW2C-MW05

OW2E-MW10

FTWG-MW-02

OC-MW20

OW2B-MW49

OW2B-MW52

OW2C-MW11

OW2E-MW03

OW2E-MW09R

OW2E-MW26

NEX-MW-D

OC-MW20D

OC-MW07D

OC-MW27D

OW26-MW01D

OC-MW15D

OC-MW19D

OC-MW14D

OC-MW21D

MW-BG09

NA

VY

R D

DEW

EY R

D

O

CEANA

BLVD

HO

R

NE

T

D R

TOMCAT BLVD

E AV

MAGAZIN

E D

R

HORNET D

R

NIMITZ DR

5TH ST LASER RD

4TH ST

OPERATIONSDR

WEAPONS RD

D AV

PA

ULJONES CIR

E AV

DEC

AT

URDR(ABANDONED)

O C

EA

N

A B

LV

D

HALSEY DR

9TH ST

O C

EA

NA

B

LV

D

1ST ST

F A V

HARPERS RD

F A V

O

CEA

NA

BLVD

G

AV

3R

D S T

N

AVY RD

8TH ST

7TH ST

3RD ST

6TH ST

1ST ST

O

CEANA

BLVD

LEYTE C

T

HARPERS RD

PH

AN

TO

M

BLVD

N

AVY R

D

IN

TER

NATIO

NAL P

KWY

B AV

O

CE

A

NA

BL

V

D

LONDON BRIDGE RD

LO

ND

O N

BR

ID

G E

RD

BELLS RD

IN

TE

RNATIO

NAL P

KWY

10TH ST

FIRST COLONIAL ROAD SOUTH

TOMCAT BLVD

TO

MCAT

BL

VD

O

CEANA BLVD

O

CEANA BLVD

LO

N

DO

N

BRIDG

E

RD

O

CEA

NA B

LVD

LO

N

DO

N

B R

IDG

E RD

TOMCAT BLVD

Figure 4-6b AOC 3 - Groundwater Results

NAS Oceana Virginia Beach, Virginia/

0 1,000500 Feet

\\dc1vs01\GISNavyClean\MIDLANT\NASOceana\MapFiles\Basewide\PFAS\678440_SI_Addendum\Figure_4-6b_AOC3_GW_Results.mxd4/7/2023PAYNEM

Legend !+U Columbia Aquifer Monitoring Well Location (Shallow; Gauged Only) +U Columbia Aquifer Monitoring Well Location (Shallow; Sampled) +U Yorktown Monitoring Well Location (Deep, Sampled)

_̂ Potential PFAS Release Location (Investigated During SI Addendum) Columbia Aquifer Groundwater Flow Direction (September 14, 2020) PFAS Area of Concern 3 Potential PFAS Release Area (Investigated During SI Addendum) Other PFAS Area of Concern Boundary

Other Potential PFAS Release Area Boundary Agricultural Lease Area Installation Boundary

Imagery: Esri, 2021

Screening Criteria Tapwater RSL

Perfluorooctane Sulfonate (PFOS) 6 Perfluorooctanoic acid (PFOA) 4 Perfluorobutane sulfonate (PFBS) 600 Perfluorohexanesulfonic acid(PFHxS) 39 Perfluorononanoic acid (PFNA) 5.9 Perfluoro-2-methyl-3-oxahexanoic acid (HFPO-DA) 6

Notes:

Due to access issues, wells were not installed around the runway Shading indicates exceedance of Groundwater RSL Bold indicates detections

* A duplicate sample was collected and the higher of the two concentrations are shown All groundwater results are shown in ng/L (nanograms per liter) or ppt (parts per trillion) J - analyte present, value may or may not be accurate or precise NA - not analyzed U - material was analyzed for, but not detected UJ - analyte note detected, quantitation limit may be inaccurate RSLs are based on November 2022 EPA RSL, HQ = 0.1.

Station ID OW2E-MW26 Sample Type groundwater Sample Date 06/17/19

PFOS 47.59

PFOA 104.15

PFBS 5.56 J

PFHxS 18.76

PFNA 16.87

HFPO-DA 0.35 U

Station ID Sample Type Sample Date 11/01/16 06/17/19

PFOS 63.1 60.34

PFOA 222 136.97

PFBS 51.7 30.45

PFHxS 473 233.97

PFNA 6.59 J 8.51

HFPO-DA NA 0.36 U

OW2B-MW41

groundwater

Station ID OW2B-MW49 Sample Type groundwater Sample Date 06/17/19*

PFOS 0.28 J

PFOA 3.3 J

PFBS 14.51

PFHxS 6.69

PFNA 0.91 U

HFPO-DA 0.36 U

Station ID OW2B-MW50 Sample Type groundwater Sample Date 06/17/19

PFOS 0.44 U

PFOA 2.03 J

PFBS 2.69 J

PFHxS 11.44

PFNA 0.88 U

HFPO-DA 0.35 U

Station ID OW2B-MW51 Sample Type groundwater Sample Date 06/17/19

PFOS 10.29

PFOA 3.26 J

PFBS 1.97 J

PFHxS 7.14

PFNA 1.61 J

HFPO-DA 0.36 U

Station ID OW2B-MW52 Sample Type groundwater Sample Date 06/17/19

PFOS 309.81

PFOA 90.17

PFBS 25.21

PFHxS 152.11

PFNA 11.95

HFPO-DA 0.36 U

Station ID OW2B-MW53 Sample Type groundwater Sample Date 06/17/19

PFOS 1,350.49

PFOA 131.61

PFBS 85.92

PFHxS 410.37

PFNA 4.94

HFPO-DA 0.36 U

Station ID Sample Type Sample Date 02/23/17* 09/19/17 06/17/19

PFOS 103 95.4 202.93

PFOA 134 136 152.71

PFBS 48.3 39 53.97

PFHxS 406 384 384.33

PFNA 3.16 U 3.17 J 6.24

HFPO-DA NA NA 0.38 U

OW2E-09R

groundwater

Station ID Sample Type Sample Date 11/01/16 06/17/19

PFOS 263 107.88

PFOA 413 245.86

PFBS 43.4 40.29

PFHxS 290 225.06

PFNA 93.6 57.06

HFPO-DA NA 0.34 U

OW2E-MW19

groundwater

Station ID OC-MW21 Sample Type groundwater Sample Date 06/26/19

PFOS 6,598.35

PFOA 1,121.52

PFBS 519.16

PFHxS 3,673.64

PFNA 84.41

HFPO-DA 0.36 U

Station ID OC-MW21D Sample Type groundwater Sample Date 06/26/19

PFOS 1,349.28

PFOA 140.28

PFBS 17.68

PFHxS 168.26

PFNA 24.17

HFPO-DA 0.36 U

Station ID Sample Type Sample Date 02/23/17 09/19/17 06/13/19

PFOS 78.7 91.3 92.43

PFOA 1,540 1,520 950.8

PFBS 16.1 14.9 27.71

PFHxS 87.1 88.4 75.77

PFNA 9.82 5.63 J 6.7

HFPO-DA NA NA 0.38 U

OW2C-MW24

groundwater

Station ID Sample Type Sample Date 02/23/17 09/19/17 06/18/19

PFOS 44,500 J 29,500 9419.94

PFOA 1,100 829 310.57

PFBS 310 J 102 656.80

PFHxS 3,580 2,520 2,579.69

PFNA 248 122 93.55

HFPO-DA NA NA 0.36 U

groundwater

OW2C-MW25

Station ID Sample Type Sample Date 11/01/16 02/23/17 09/19/17 06/13/2019*

PFOS 2,430 1,340 790 1,603.52

PFOA 546 268 234 162.78

PFBS 195 97.9 74.3 54.11

PFHxS 881 489 381 337.99

PFNA 23.1 29.2 59.8 19.25

HFPO-DA NA NA NA 0.37 U

OW2C-MW19

groundwater

Station ID OC-MW16 Sample Type groundwater Sample Date 06/24/19

PFOS 182.28 J

PFOA 24.72 J

PFBS 25.64 J

PFHxS 191.13 J

PFNA 2.72 J

HFPO-DA 0.34 UJ

Station ID Sample Type Sample Date 11/01/2016* 06/18/19

PFOS 471,000 522,957.58

PFOA 22,600 82,432.45

PFBS 4,950 14,159.58

PFHxS 52,400 J 275,636.54

PFNA 1,650 1,219.68

HFPO-DA NA 0.35 U

OW26-MW01

groundwater

Station ID Sample Type Sample Date 04/03/17 06/18/19

PFOS 10.1 961.27

PFOA 2.1 U 47

PFBS 4.2 U 8.51

PFHxS 2.37 J 130.37

PFNA 2.1 U 5.86

HFPO-DA NA 0.35 UJ

OW26-MW01D

groundwater

Station ID OC-MW20 Sample Type groundwater Sample Date 06/26/19

PFOS 1,252.06

PFOA 664.54

PFBS 484.32

PFHxS 2,089.19

PFNA 23.67

HFPO-DA 0.34 J

Station ID OC-MW20D Sample Type groundwater Sample Date 06/26/19*

PFOS 1.65 U

PFOA 1.08 U

PFBS 0.5 J

PFHxS 1.62 J

PFNA 0.24 J

HFPO-DA 0.34 U

Station ID DT-MW-02 Sample Type groundwater Sample Date 08/07/19

PFOS 2,293.72

PFOA 178.49

PFBS 56.32

PFHxS 1,213.46

PFNA 25.72

HFPO-DA 0.34 U

Station ID OC-MW14 Sample Type groundwater Sample Date 06/24/19

PFOS 0.57 UJ

PFOA 0.43 UJ

PFBS 0.43 UJ

PFHxS 0.11 J

PFNA 0.86 UJ

HFPO-DA 0.34 UJ

Station ID OC-MW14D Sample Type groundwater Sample Date 06/24/19*

PFOS 1.34 J

PFOA 0.84 UJ

PFBS 0.59 J

PFHxS 0.23 J

PFNA 0.24 J

HFPO-DA 0.33 UJ

Station ID OC-MW15 Sample Type groundwater Sample Date 06/24/19

PFOS 0.48 UJ

PFOA 0.86 UJ

PFBS 1.06 J

PFHxS 1.8 J

PFNA 0.89 UJ

HFPO-DA 0.36 UJ

Station ID OC-MW15D Sample Type groundwater Sample Date 06/24/19

PFOS 0.72 UJ

PFOA 0.45 UJ

PFBS O.45 UJ

PFHxS 0.24 J

PFNA 0.89 UJ

HFPO-DA 0.36 UJ

Station ID OC-MW27 Sample Type groundwater Sample Date 06/20/19

PFOS 28.6

PFOA 27.62

PFBS 13.58 J

PFHxS 17.71

PFNA 4.18 J

HFPO-DA 0.37 UJ

Station ID OC-MW27D Sample Type groundwater Sample Date 06/20/19

PFOS 0.45 U

PFOA 0.45 U

PFBS 0.45 U

PFHxS 0.36 U

PFNA 0.91 U

HFPO-DA 0.36 U

Station ID Sample Type Sample Date 11/01/16 06/07/19

PFOS 4,020 7,330.29

PFOA 12.6 0.49 U

PFBS 4.27 J 23.11

PFHxS 212 285.06

PFNA 6.08 J 4.33 J

HFPO-DA NA 0.39 U

JTC-MW-B

groundwater

Station ID Sample Type Sample Date 10/31/16 06/07/19

PFOS 15.6 3.97 J

PFOA 2.05 U 0.45 U

PFBS 4.1 U 0.85 J

PFHxS 19.3 4.21 J

PFNA 2.05 U 0.54 J

HFPO-DA NA 0.36 U

MW-BG11

groundwater

Station ID Sample Type Sample Date 04/04/17 06/13/19

PFOS 3.63 J 0.46 U

PFOA 0.685 J 0.46 U

PFBS 4.03 U 0.46 UJ

PFHxS 2.02 U 0.37 UJ

PFNA 2.02 U 0.93 U

HFPO-DA NA 0.37 UJ

OC-MW07

groundwater

Station ID Sample Type Sample Date 04/04/17 06/13/19

PFOS 0.953 U 0.49 U

PFOA 2.12 U 0.49 U

PFBS 4.24 U 0.49 UJ

PFHxS 2.12 U 0.39 UJ

PFNA 2.12 U 0.98 U

HFPO-DA NA 0.39 UJ

OC-MW07D

groundwater

Station ID NEX-MW13 Sample Type groundwater Sample Date 06/10/19

PFOS 224.57

PFOA 13.8

PFBS 9.58

PFHxS 25.26

PFNA 1.61 J

HFPO-DA 0.35 U

Station ID NEX-MW-C Sample Type groundwater Sample Date 06/12/19

PFOS 315.51

PFOA 66.27

PFBS 9.06

PFHxS 13.53

PFNA 13.97

HFPO-DA 0.36 U

Station ID OC-MW19 Sample Type groundwater Sample Date 06/24/19

PFOS 9,005.05 J

PFOA 2,852.27 J

PFBS 396.42 J

PFHxS 3,971.8 J

PFNA 166.29 J

HFPO-DA 0.36 UJ

Station ID OC-MW19D Sample Type groundwater Sample Date 06/25/19

PFOS 99.19

PFOA 57.3

PFBS 4.65

PFHxS 67.26

PFNA 0.54 J

HFPO-DA 0.36 UJ

Station ID OW24-MW11 Sample Type groundwater Sample Date 06/18/19

PFOS 28.58

PFOA 8.27

PFBS 1.33 J

PFHxS 11.42

PFNA 3.27 J

HFPO-DA 0.36 UJ

Station ID Sample Type Sample Date 11/08/16 08/06/19

PFOS 40.1 177.71

PFOA 90.3 13.70

PFBS 7.94 J 4.82

PFHxS 11 29.39

PFNA 3.59 U 2.18 J

HFPO-DA NA 0.35 U

FTWG-MW-02

groundwater

Station ID OC-MW17 Sample Type groundwater Sample Date 08/14/19

PFOS 179.22

PFOA 7,150.96

PFBS 34.91

PFHxS 354.61

PFNA 5.94

HFPO-DA 0.38 U

Station ID Sample Type Sample Date 10/28/16 06/19/19

PFOS 11.4 1.4 J

PFOA 2.02 U 0.47 UJ

PFBS 4.03 U 0.14 J

PFHxS 2.02 U 0.59 U

PFNA 2.02 U 0.94 UJ

HFPO-DA NA 0.38 UJ

MW-BG06

groundwater

Station ID Sample Type Sample Date 10/28/16 06/12/19

PFOS 29.2 1.62 U

PFOA 1.65 J 0.67 J

PFBS 3.97 U 0.2 J

PFHxS 5.48 J 0.6 J

PFNA 1.98 U 0.91 U

HFPO-DA NA 0.36 U

MW-BG07

groundwater

Station ID Sample Type Sample Date 10/31/16 06/19/19*

PFOS 4.98 U 18.85

PFOA 3.15 J 1.34 UJ

PFBS 4 U 1.14 J

PFHxS 10.1 14.64

PFNA 2 U 0.24 J

HFPO-DA NA 0.36 UJ

MW-BG09

groundwater

Station ID Sample Type Sample Date 11/02/16 06/18/19

PFOS 1.23 J 1.35 U

PFOA 2.1 U 0.32 J

PFBS 4.2 U 0.42 U

PFHxS 2.9 J 0.42 U

PFNA 2.1 U 0.28 J

HFPO-DA NA 0.34 U

MW-BG10

groundwater

Station ID Sample Type Sample Date 11/01/16 06/10/19

PFOS 33.4 22.89

PFOA 15.6 11.72

PFBS 6.89 J 5.66

PFHxS 46.7 32.44

PFNA 1.98 U 0.59 J

HFPO-DA NA 0.39 U

groundwater

OC-MW03

Station ID Sample Type Sample Date 02/23/17 09/19/2017* 06/18/19

PFOS 249 227 185.25

PFOA 42.9 70.7 100.99

PFBS 9.86 20.1 29.68

PFHxS 78.8 115 136.26

PFNA 108 69.3 37.66

HFPO-DA NA NA 0.33 UJ

groundwater

OW2C-MW05

Station ID Sample Type Sample Date 10/31/16 06/10/19

PFOS 39.6 14.85

PFOA 6.84 J 4.23 J

PFBS 4.03 J 2.53 J

PFHxS 42.8 24.15

PFNA 1.98 U 0.37 J

HFPO-DA NA 0.36 U

OC-MW04

groundwater