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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
# 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
LEGEND
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.
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
Date Measured standingwater levelInferred groundwater level(baseline GME)Inferred groundwater level(end of wet)PFAS concentration (µg/L)00.0
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.
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
Fractures / honeycombstructures within
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
SWL Approx.1 - 8 mbgs
(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
Onsite historicalproduction bore
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
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
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
Onsite historicalproduction bore
RN000238
Onsite historicalproduction bore
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
Fractures / honeycombstructures within
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
SWL Approx.4 - 8 mbgs
(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
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)