EAST - Department of Defence

0 Distance (m) 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000

Ele

vatio

n (m

)

-10

-5

0

5

10

15

20

25

30

35

-10

-5

0

5

10

15

20

25

30

35

WEST

EAST

2.55

0.3805/09/2017

9.02

9.38 10.02

8.43

12.48

01/09/2017

16.68

14.5529/08/2017

18.19

1.0324/08/2017

23.11

272.324/08/2017

(54 m)

(-70 m)

(31 m)

(37 m)

(6 m)

(-58 m)

MW

107

MW

113

MW

116

MW

117

MW

148

MW

183

CLAY

SILTSTONE

FERRICRETE

SAND

MW100MW101

MW102

MW103

MW104MW105

MW106

MW108MW109

MW110MW114

MW115MW121

MW126

MW127

MW129

MW130

MW146

MW147 MW166MW182

MW202

MW107

MW113MW116

MW117MW148

MW183

CD

F_0_

9_06

_CU

STO

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IBR

AR

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ELB

OU

RN

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original size

scale

fig no: rev:

DEPARTMENT OF DEFENCE

754-MELEN199421 FIGURE 29A A

H 1:12000 V 1:250

23/01/2018

CO

RH

PFAS DARWIN

HYDROGEOLOGICAL CROSS SECTIONWEST

MATERIAL GRAPHIC AND PROJECT UNIT

SILTYCLAY

FILL

SILTSTONE CLAYEYSANDGRAVELLYSAND

SAND CLAYEYGRAVEL

QUARTZITEBottomResponseZone

TopResponse

Piezometer

Zone

Baselineoffset

BOREHOLE(0 m)

BH

/MW

#

LEGEND

Monitoring wellCreek survey pointCross section line

MAPGROUNDWATERmAHD

Date Measured standingwater levelInferred groundwater level(baseline GME)Inferred groundwater level(end of wet)PFAS concentration (µg/L)00.0

PFASconcentration (µg/L)vertical delineation

00.0

0 10 15 20 25m5

V 1:250

H 1:12000

H:V = 48:1 = 48x Vertical exaggeration

300 400100 200 500m0

Geological boundaries are only known at the test site locations and have been inferred between the test

sites. These geological boundaries have been provided to assist with the geological interpretation and should not be considered to represent actual boundaries that

may vary from these lines.

00.10.20.30.40.50.6

8:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW113_170824

0

50

100

150

2008:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW117_170824

0

5

10

158:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW107_170829

0

5

10

158:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW148_170901

00.10.20.30.40.50.6

8:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW183_170905

23.75

110.524/08/2017

0

20

40

60

808:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW116_170824

0 Distance (m) 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000

Ele

vatio

n (m

)

-5

0

5

10

15

20

25

30

35

-5

0

5

10

15

20

25

30

35

SOUTH NORTH

19.93

2.0805/09/2017

21.44

6.18 6.66

6.44

6.24

28/08/2017

23.75

110.524/08/2017

21.23

36.7907/09/2017

6.99

4.16 4.09

4.94

2.93

07/09/2017

23.87

421.824/08/2017

MW

115

MW

116

MW

144

MW

190

RapidCreek

Invert level8.507

MW

200

ASM

W04

(-51 m)(-35 m)

(-51 m)

(-150 m)

(54 m)

(233 m)

CLAY

SILTSTONE

FERRICRETE

SAND

FILL

MW114MW117

MW189

MW191

MW192

MW196

ASMW04

MW115MW116MW144

MW190

MW200

Rapid Creek

CD

F_0_

9_06

_CU

STO

M_L

IBR

AR

Y_M

ELB

OU

RN

EM

ETR

O.G

LB F

ence

CO

F FE

NC

E A

3L W

ITH

PLA

N 7

54-M

ELE

N19

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A3

client:drawn

project no:

date title:

project:approved

original size

scale

fig no: rev:


754-MELEN199421 FIGURE 29B A

H 1:12000 V 1:250

23/01/2018

CO

RH

PFAS DARWIN

HYDROGEOLOGICAL CROSS SECTIONCENTRE


CLAY

FILL

SILTSTONE CLAYEYSANDGRAVELLYSAND

SAND

SILTYSAND

CLAYEYGRAVEL

GRAVEL

SANDYGRAVEL

BottomRESPONSEZone

TopRESPONSE

Piezometer

Zone

Baselineoffset

BOREHOLE(0 m)

BH

/MW

# Monitoring wellCreek survey pointCross section line

MAPGROUNDWATERmAHD



00.0

LEGEND

0 10 15 20 25m5

V 1:250

H 1:12000


300 400100 200 500m0




0

20

40

60

808:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW115_170803

0

1

2

3

4

58:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW144_170828

0

1

2

3

4

58:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW190_170905

0

20

40

60

808:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW116_170824

0

1

2

3

4

58:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW200_170905

05

1015202530

8:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_ASMW04_170907

Monitoring wellCreek survey pointCross section line

MAPGROUNDWATERmAHD



00.0

0 Distance (m) 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000

Ele

vatio

n (m

)

-10

-5

0

5

10

15

20

25

30

35

-10

-5

0

5

10

15

20

25

30

35

SOUTH WEST NORTH EAST

12.46

0.1705/09/2017

20.89

0.2828/09/2017 20.66

20.9629/08/2017

18.85

10.6207/09/2017

7.40

4.91

19.15

28.9428/08/2017

19.32

24.1824/08/2017

RapidCreek

(135 m)

(-82 m)

(-107 m)

(78 m)(53 m)

(-78 m)

MW

112M

W14

1

MW

156

MW

168

MW

171

MW

178

Invert level19.25

SILTSTONE

FERRICRETE

SAND

FILL

MW140

MW142

MW169

MW170

MW172

MW179

MW112

MW141MW156

MW168 MW171

MW178

CD

F_0_

9_06

_CU

STO

M_L

IBR

AR

Y_M

ELB

OU

RN

EM

ETR

O.G

LB F

ence

CO

F FE

NC

E A

3L W

ITH

PLA

N 7

54-M

ELE

N19

9421

RE

V1.

GP

J <

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gFile

>> 2

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7 14

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AI R

EFE

RE

NC

E: 1

9942

1_01

_GR

A01

1.A

I_3

A3

client:drawn

project no:

date title:

project:approved

original size

scale

fig no: rev:


754-MELEN199421 FIGURE 29C A

H 1:12000 V 1:250

23/01/2018

CO

RH

PFAS DARWIN

HYDROGEOLOGICAL CROSS SECTIONEAST


FILL

SILTSTONE

GRAVELLYSILT

CLAYEYSANDGRAVELLYSAND

SAND CLAYEYGRAVEL

BottomResponseZone

TopResponse

Piezometer

Zone

Baselineoffset

BOREHOLE(0 m)

BH

/MW

#

LEGEND

0 10 15 20 25m5

V 1:250

H 1:12000


300 400100 200 500m0




0

5

10

15

20

258:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW112_170824

0

5

10

15

20

258:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW171_170829

0

5

10

15

20

258:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW168_170829

0

0.1

0.2

0.3

0.4

0.58:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW141_170828

0

0.1

0.2

0.3

0.4

0.58:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW178_170905

0

2

4

6

8

108:2 FTS

6:2 FTS

PFBS

PFHxSPFOS

PFHxA

PFOA

1302_MW156_170905

SadgrovesCreek

toDarwinHarbour

(tidal)

Inferredgroundwater

flow consistentwith topography / surface water flow(to be confirmed)

FormerDarwin Airport

StuartHighway

RAAF BaseDarwin

Southernboundary

Sportsfield

Winnellie(predominantly commercial

and industrial land use)Tiger Brennan

Drive

Drainageoutlet

Potential migrationpathway via open

spoon drains 016_M

W01

15mb

gs

CLAY

CLAY

GRAV

EL

Quar

tzbo

ulder

s,SA

NDPo

rcillin

iteSA

NDSA

NDSA

NDQu

artz

SAND

,Qu

artz

CLAY

,Qu

artz

Schis

t with

Quar

tzSc

hist

Burre

ll

Porci

llinite

,mu

dston

e,CL

AYSo

il, CL

AYSH

ALE

CLAY

Quar

tz se

ams

SHAL

E

Soil,

Quar

tz bo

ulder

s

Silts

tone,

Quar

tz se

ams,

SHAL

E

Drainagepoint

Fractures / honeycombstructures within

weathered sediments

Potential infiltration ofPFAS to groundwater

Potential migrationpathway via underground

drainage system

RECEPTOROffsite

production bores

RECEPTORMaintenance

workers

RECEPTORSite users

RECEPTOREcosystem of Sadgroves CreekConsumers of biota from creek

Potential AFFF useon sports field

Onsite historicalproduction bore

RN000236AFFF

release

RAAF Base Darwin

A'SOUTH

ANORTH

SWL Approx.2 - 8 mbgs

(unconfined)

Cainozoiclateritic clays

Bathurst Island Formationweathered

claystone / sandstone /sandstone

Proterozoic Burrell Formationsiltstone, shale and sandstone

(confined aquifer)

Seasonal fluctuationof groundwater levels

(Groundwater level close tosurface during wet season)

Figure No:

30ADepartment of Defence

PFAS Assessment

RAAF Darwin Conceptual Site ModelConceptual Cross Section A-A':

North to South754-MELEN199421

199421_DSI_F030A_GRA

23.01.2018Date:

File Name:

Project

AI R

efere

nce:

1994

21_0

1_GR

A012

.ai _9

A'

A

Indicative location of conceptual cross section

LEGENDPotential residue source areas

Approximate end of wet seasonstanding water level (SWL)Approximate end of dryseasonstanding water level (SWL)

Potential migration pathway

LudmillaCreek

toDarwinHarbour

(tidal)

BagotRoad

RAAF BaseDarwin

Western boundary

RAAFGolf Course

Bagot(Residential land use)

Discharge toLudmilla Creek DARM_M

W01

Potential migrationpathway via

open spoon drains


weathered sediments

Potential infiltration ofPFAS to groundwater

Potential migrationpathway viaunderground

drainage system

Drainage linesbeneath

Bagot RoadDam / pond

Hangar 31(NT1031)Multiple AFFFrelease incidents

Fuel Farm 1(NT0201)

Multiple AFFFrelease incidents

Airnorth crash site(NT1029)

AFFF used toextinguish crash

RAAF Base Darwin

B'WEST

BEAST

201_M

W01

Cainozoiclateritic clays

Bathurst IslandFormationweathered

claystone / sandstone /siltstone

Proterozoic BurrellFormation

siltstone, shaleand sandstone

(confined aquifer)

Inferred groundwater flowconsistent with topography /

surface water flow


(unconfined)

CLAY

SAND

STON

E(ca

lled s

and s

chist

)GR

AVEL

Schis

tBu

rrell

GRAV

EL(w

ater w

orn)

CLAY

SAND

STON

Eor

SLA

TE

SILT

STON

Ewi

th GR

AVEL

SILT

STON

Ewi

th Qu

artz

seam

sCL

AY

SANDSTONE

LATERITE

RECEPTOROffsite

productionbores

RECEPTORMaintenance

workersRECEPTORSite users

RECEPTOREcosystem of

Ludmilla Creek~High tide~Low tide

Potential dischargeof PFAS impactedgroundwater to creek


RN000236

GRAVEL LAYER (continuity unknown)

Figure No:

30BDepartment of Defence

PFAS Assessment

RAAF Darwin Conceptual Site ModelConceptual Cross Section B-B':

East to West754-MELEN199421

199421_DSI_F030B_GRA

23.01.2018Date:

File Name:

Project

AI R

efere

nce:

1994

21_0

1_GR

A013

.ai _4

B'

B





RECEPTORSite users

Reichart CreekMangroves

StuartHighway

RAAF BaseDarwin

Southernboundary

Winnellie(predominantly commercial

and industrial land use)Tiger Brennan

Drive

Winnellie Drainoutlet

CLAY (laterite)

SCHI

STwi

th sla

teSC

HIST

SLAT

Ewi

th Qu

arts

CLAY (white) CLAY (laterite)

SILT

STON

E

CLAY (white)

CLAY (laterite)

SAND

STON

E

CLAY (white)

CLAY (laterite)

SILT

STON

ESI

LTST

ONwi

th Qu

artz

CLAY (white)

CLAY (laterite)

SHAL

E(sl

ate)

IRON

STON

E

CLAY (white)

RECEPTORMaintenance

workers

RECEPTOREcosystem ofReichardt Creek

RECEPTOREcosystem and

recreational usersof Rapid Creek


RN000238


RN037576

? Other potentialPFAS sources from

industrial area

RAAF Base Darwin

C'SOUTH WEST

CNORTH EAST

RapidCreek

toDarwin

Harbour

234_M

W07

1302_2

34MW05

Landfill 14(NT0234)

Joint airfieldDIA / DoD

241_M

W2

Migration of PFAS viasurface water or open drain

and sediment


weathered sediments

PFASimpacted soil

Potentialinfiltration of

PFAS togroundwater

Redundant firetraining area

(NT0241)Eastern endof runway

Inferred groundwater flowNE in wet season

and N to NNW in dry seasonInferred groundwater flow


(unconfined)

Groundwater divideExact location unclear and

expected to move from wet season to dry season

RECEPTOROffsite

production bores

~Wet season~Dry season

Figure No:

30CDepartment of Defence

PFAS Assessment

RAAF Darwin Conceptual Site ModelConceptual Cross Section C-C':

South West to North East754-MELEN199421

199421_DSI_F030C_GRA

23.01.2018Date:

File Name:

Project

AI R

efere

nce:

1994

21_0

1_GR

A014

.ai _4

C'

C





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EAST - Department of Defence