department infrastructure, helping australia energy
TRANSCRIPT
The effects of wastedisposal on groundwater
quality in Tasmania
The effects of wastedisposal on groundwater
quality in Tasmania
Tasmanian Geological
Survey Record 2002/09
NHT Funded Project
NLP 13188
Stieglitzsewagelagoons
MINERAL RESOURCESTASMANIA
DEPARTMENTINFRASTRUCTURE,
ENERGY RESOURCES
of
and
Tasmania
NaturalHeritage
TrustHelp in g Comm uni t i e s
He lp ing A us t ra l i a
While every care has been taken in the preparation of this report, no warranty is given as to the correctness of the
information and no liability is accepted for any statement or opinion or for any error or omission. No reader
should act or fail to act on the basis of any material contained herein. Readers should consult professional
advisers. As a result the Crown in Right of the State of Tasmania and its employees, contractors and agents
expressly disclaim all and any liability (including all liability from or attributable to any negligent or wrongful
act or omission) to any persons whatsoever in respect of anything done or omitted to be done by any such
person in reliance whether in whole or in part upon any of the material in this report.
INTRODUCTION
Mineral Resources Tasmania (MRT) initiated a projectto investigate the effects of waste disposal ongroundwater quality in Tasmania. The project wasfunded by MRT and the Natural Heritage Trust (NHT)and included a number of sites for detailed study. Thesewage lagoons at Stieglitz were one of these sites.
The objectives of the investigations at the Stieglitzsewage lagoons were to:
� Determine the geological nature of the hostmaterials;
� Identify the depth of the water table;
� Examine the quality of the groundwater;
� Determine the permeability of the host materials;and
� Identify if a potential hydraulic connection existsbetween the lagoons and the local groundwatersystem.
SITE DESCRIPTION
The township of Stieglitz is located on the east coast ofTasmania, bordering Georges Bay about fourkilometres east of St Helens. The Stieglitz sewagelagoons are located approximately 500 metressoutheast of Stieglitz (609 200 mE, 5 423 700 mN)(fig. 1). The lagoons, which have been in operationsince about 1983, are currently licensed by theDepartment of Primary Industries, Water andEnvironment (DPIWE) while the Break O’Day Councilis responsible for maintenance. Engineering
consultants Sinclair Knight Merz have supervisedadditional engineering works undertaken since theinitial construction of the lagoons.
During construction both lagoons had a one metrecement wave wall constructed at surface level toprevent wave erosion damage. Post construction, thesouthern lagoon was lined with geo-fabric materialsprayed with bitumen. This liner has since lifted fromthe base of the lagoon and can been seen floating at thesurface (Plate 1). Both lagoons are located in gravellysand.
Tasmanian Geological Survey Record 2002/09 1
Groundwater quality investigationsat the Stieglitz sewage lagoons
A. R. Ezzy
DEPARTMENTINFRASTRUCTURE,
ENERGY RESOURCES
of
and
Tasmania
Mineral Resources Tasmania
Tasmanian Geological Survey
Record 2002/09
NaturalHeritage
TrustH elp in g Commu n i t i e s
H e l p ing Aus t r a l i a
Abstract
Groundwater was investigated in the area of the Stieglitz sewage lagoons to determine if the lagoons were
affecting groundwater quality. The lagoons are situated close to perched shallow water tables. Further
investigations are required to refine the hydrogeological model of the site and preferred pathways of flow
from groundwater mounding beneath the lagoons.
St Helens
Stieglitz
Sewagelagoons
54 00025 mN
30
6000
05
mE
10 15
TAS
MA
N
SE
A
GeorgesBay
Launceston
Hobart
St Helens
Figure 1
Location of the Stieglitz sewage lagoons.
Tasmanian Geological Survey Record 2002/09 2
60
00
08
mE
60
00
10
mE
54 00024 mN
54 00022 mN
Quaternary
Alluvium, swamp and marshdeposits
Conglomerate, gravel, sandand derived lag
Tertiary
Devonian
Sparsely porphyritic coarse-grained biotite hornblendegranodiorite
Beach and sand dunes,beach sand (Qhb)
Stieglitzlagoons
Plate 1
Geo-fabric liner sprayed with bitumenfloating in the southern lagoon.
Figure 2
Extract from the St Helens geological map (McClenaghan et al., 1987) of the local area and related geology.
Plate 2
Drainage line west of the sewagelagoons with bore hole SZSL2001/2
in the foreground.
Geology
The Tasmania Department of Mines 1:50 000 scalegeological map of the St Helens area (McClenaghan etal., 1987) indicates that the geology of the lagoonfootprints comprises Tertiary-aged conglomerate,gravel and sand (fig. 2). Quaternary-aged alluvial,swamp and marsh deposits are indicated to the east ofthe lagoons.
Geological mapping during the current studyindicated that the site is dominated by gravel and sanddeposits within 80 m of the lagoons in all directions.Occasional small pods of high plasticity white claywere observed in the area of an old landfill southwestof the lagoons. Dark brown hard pans of iron-enrichedmaterial were also observed in the area.
Hydrology
The lagoons are located within 100 m of a drainage lineto the west that discharges into Chimneys Lagoon(Plate 2). Windmill Lagoon is located approximately250 m to the east of the lagoons. Australian Bureau ofMeteorology rainfall station 092033 (St Helens PostOffice) is the closest rainfall station to the site. The chartof average monthly recorded rainfall (fig. 3) shows thatthe average annual rainfall of 774.6 mm is evenlydistributed over the year. The average annual rainfallis low when regarded in a statewide perspective.
INVESTIGATION METHODS
Borehole drilling and installation
Five 120 mm diameter monitoring bores were augerdrilled on 8 March 2001 for this project (fig. 4). All bores(except SZSL2001/4) were drilled to the maximumdepth capacity of the drilling rig. Fifty millimetre PVCcasing and slotted screens with bentonite seals wereinstalled in each hole. All bores were logged inaccordance with AS 1726-1993; engineering logs arepresented in Appendix 1.
Groundwater was encountered between 3.2 m(SZSL2001/4) and 7.1 m (SZSL2001/3) depth below
ground level across the site. Flow during drillingindicated that the groundwater in all boreholes wasunconfined. Recorded yields of bores ranged between0.012 to 0.033 l/s. Figure 5 shows a cross-section andthe standing water level on 19 August 2001.
Both the unsaturated and saturated zones mainlyconsist of heterogenous layers of clay, fine tocoarse-grained sand and gravel. Layers of low tomedium plasticity clay were intercepted in boreholesSZSL2001/2 and SZSL2001/3. A strong organic odourwas observed on the returns of SZSL2001/1 between2.3 and 8.3 metres. Rounded quartzite pebbles wereintercepted in bore SZSL2001/4 and indicatereworking and imported material in this area.
SZSL2001/4 was drilled as a potential up-gradientbackground bore. Several months after the installationof the bores, the Break O’Day Council undertookearthworks to control surface water run off in thevicinity of the southwest corner of the southernlagoon. Hole SZSL2001/4 failed to make water afterthese earthworks were undertaken.
Engineering logs of the boreholes indicate that thebund walls overlying the Tertiary sediments consist ofreworked clayey sandy gravelly material.
In situ permeability testing
A slug extraction test on bore SZSL2001/3 was carriedout on 17 August 2001. Data collected during this test ispresented in Appendix 2.
The slug extraction test data was analysed in thesoftware package AquiferWin32 (Version 2.17,Environmental Simulations Inc.). The Bouwer andRice (1976, Unconfined Aquifer) solution was used tocalculate the hydraulic conductivity value forSZSL2001/3 (fig. 6). This method was selected as themost appropriate available within the softwarepackage.
Tasmanian Geological Survey Record 2002/09 3
56.154.6
76.2
66.762.9
65.0
70.967.3
60.8
67.4
59.3
67.1
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0
20
10
40
30
50
60
70
80
90
Mo
nth
lyR
ain
fall
(mm
)
Figure 3
Average monthly rainfall for AustralianBureau of Meteorology rainfall station
092033, St Helens Post Office.
Tasmanian Geological Survey Record 2002/09 4
60
00
88
mE 90
92
94
96
98
542 0028 mN
30
32
34
36
38
61
00
00
mE
OLD LANDFILLFOOTPRINT
(APPROX. ONLY)
SZSL2001/3
SZSL2001/2
SZSL2001/1
SZSL2001/4
SZSL2001/5
Windmill
Lagoon
Figure 4
Locations of environmental monitoring bores installed at the Stieglitz sewage lagoons.
Hydraulic Conductivity 0.921271 m/d
Data Used Data Ignoredx
0.0 1.8 3.6 5.4 7.2 9.0
Time (minutes)
100
10-1
10-2
10-3
Dis
pla
cem
ent
(m)
LEGEND
Figure 6
Hydraulic conductivity value forSZSL2001/3 (K = 0.92 m/d =1.07 � 10-5 m/sec) calculated inAquiferWin32 (Version 2.17,
Environmental Simulations Inc.),Bouwer and Rice (1976 Unconfined
Aquifer) solution.
HYDROLOGICAL MODEL
Constraints related to the drilling contractor’s depthcapacity did not allow for a complete groundwaterflow-regime investigation. Iron pans within thesediments appear to be producing perched watertables. The drying up of borehole SZSL2001/4 (refusalon iron pan) after surface drainage control workssupports this comment.
Some of the gravel is clay bound (also demonstrated bylow yields), implying the main groundwater storagecapacity occurs within the sandy zones. Perched wateris also most likely occurring above the clay-enrichedlayers/lens. It is expected that holes drilled to greaterdepth would intercept additional groundwater andallow for a more complete interpretation of thegroundwater flow regime in the area of the lagoons.
An interpretation of the piezometric surface (based onsurveyed heights and groundwater depths of theboreholes in the limited area of the lagoons) is shownin Figure 7. The water table appears to slope towardsthe northwest and a groundwater mounding effect isalso indicated close to and beneath the lagoons.
GROUNDWATER CHEMISTRY
All bores were sampled in accordance withAustralian/New Zealand Standard AS/NZS5667.11:1998 on 15 May 2001. Bore SZSL2001/4contained no water and therefore was not sampled.Laboratory testing of samples of groundwaterextracted form the boreholes was carried out byAnalytical Services Tasmania, in accordance with
relevant Australian and international standards(Appendix 3). Values for pH ranged between 5.0 and5.5. Conductivity values ranged between 430 and 656
�S/cm. Analytical results are presented on site maps inAppendix 4. Figure 8 is a cation Ternary plot for theresults of the groundwater analyses. Tables 1 and 2compare the analytical results against internationalstandards where a guideline/emission value is statedby the relevant standard.
Tasmanian Geological Survey Record 2002/09 5
SZSL2001/2 SZSL2001/1 SZSL2001/5
A’A
GC
GC
SP
SC
SM
SP
CL
CL
CL
SM
SP
SP
GC
SC
SM
GC
DTW — 19 August 2001 V:H = 10:1
23
22
21
20
19
18
17
16
15
14
23
22
21
20
19
18
17
16
15
14
Figure 5
Cross-sections and related standing water levels on 19 August 2001 for bores SZSL 2000/2, 1 and 5 [A-A’].
90
92
94
36
38
SZSL2001/3
SZSL2001/2
SZSL2001/1
SZSL2001/4 SZSL2001/5
15.5 m
16.0 m
15.0 m
Figure 7
Interpretation of the piezometric surface based onsurveyed heights and groundwater depths of the boreholes
(RL water surface contours).
For the water parameters analysed, the groundwaterchemistry shows little variation in the area of thelagoons. Groundwater that was interpreted asdown-gradient of the lagoons (SZSL2001/2 and 5) hadsome slightly elevated chemical results for sulphate,magnesium, and iron. The water chemistry ofSZSL2001/3 and 5 is dominated by sodium andpotassium cations (fig. 8), with the other two borescontaining higher levels of magnesium and calciumcations. SZSL2001/3 and 5 are both screenedpredominantly in clayey gravel, which may accountfor these differences.
CONTAMINATION ASSESSMENT
The combination of in situ permeability testing, thecross section (fig. 5) and piezometric surface map(fig. 7) demonstrate that the Tertiary unconsolidatedsedimentary aquifer may potentially transport anyleakage from the sewage lagoons. There is a highpotential for significant migration of effluent andconsequent effects in the coastal sediments and theTertiary plain area. Transport velocities, based on slugtest data, may be as high as one metre per day. This
implies that leakage from the sewage lagoons couldreach Chimneys Lagoon or Windmill Lagoon inapproximately one year.
There are currently no known users of groundwater inthe area.
PRINCIPAL CONCLUSIONS
Layers and/or lens of clayey gravel, clay and iron pans(acting as aquitards) control perched groundwater.Migration of effluent water from the lagoons mayfollow preferred pathways to a deeper, unconfinedunconsolidated aquifer. This aquifer most likely hashydraulic connection to Chimneys and Windmilllagoons. Investigations of groundwater quality in thearea should consider potential impacts of the unlinedold landfill to the west.
FURTHER WORK
Because of the clay content within the gravel,geophysical investigations may not detect a distinctgroundwater plume at the site. A ground conductivitysurvey may identify potential sand/gravel channelsand therefore preferred pathways of flow within thesediments. Any identified channels/pathways mayrepresent future drilling targets.
The drilling of a background bore some distance fromthe lagoons would enable the determination of localTDS levels. A comparison of background TDScombined with the installation of strategically placedadditional bores may indicate the degree of recharge togroundwater from the lagoons.
Future monitoring of microbiological water qualityparameters may help to confirm the extent of thedegradation of groundwater quality in the local areaand the processes associated with potential naturalattenuation at the site. Effluent water chemistry fromthe lagoons should be considered as part of thisassessment.
REFERENCE
MCCLENAGHAN, M. P.; TURNER, N. J.; WILLIAMS, P. R. 1987.Geological Atlas 1:50 000 Series. Sheet 41 (8515S). St Helens.Department of Mines Tasmania.
[30 May 2002]
Tasmanian Geological Survey Record 2002/09 6
Mg
80
60
40
20
0
Ca
20
0100
40
60
80
80100 60 40 20 0100
Na + K
3
2
5
4
1
Figure 8
Cation ternary plot for groundwater bores at the Stieglitzsewage lagoons. 1 — SZSL2001/1; 2 — SZSL2001/2;
3 — SZSL2001/3; 4 — SZSL2001/5; 5 — average of allMRT groundwater records for Quaternary coastal sands.
Tasmanian Geological Survey Record 2002/09 7
Table 1
Comparison of analytical results against water quality standards(guideline value listed when stated by a relevant standard)
Parameter SZSL 2000/1 SZSL 2000/2 SZSL 2000/3 SZSL 2000/5 Emission limit
pH 5.2 5.5 5.3 5.0 N/A
Conductivity (�S/cm) 430 594 656 587 N/A: note average sea water value 36 000.
TDS (mg/L) 226 324 368 331 N/A
Bromide (mg/L) 0.71 2.7 0.96 0.20 N/A
Chloride (mg/L) 83 110 86 81 250* (mg/L)
Fluoride (mg/L) <0.02 0.09 <0.02 0.04 1.5* (mg/L)
Sulphate (mg/L) 11 36 150 140 250* (mg/L)
Ammonia (mg-N/L) <0.05 0.34 0.08 <0.05 0.5* (mg/L) nitrogen (as ammonia)
Nitrate (mg-N/L) <0.03 <0.03 0.46 0.04 10.0* (mg/L) nitrogen (as nitrate or nitrite)
Nitrite (mg-N/L) <0.10 <0.10 <0.10 <0.10 10.0* (mg/L) nitrogen (as nitrate or nitrite)
Phosphate (mg-P/L) <0.10 <0.10 <0.10 <0.10 2.0* as phosphorus
Calcium (mg/L) 10.2 22.4 4.30 2.18 N/A
Potassium (mg/L) 1.13 1.63 0.78 0.98 N/A
Magnesium (mg/L) 5.98 12.9 2.94 2.10 N/A
Sodium (mg/L) 56.3 62.1 68.2 113 N/A
Aluminium (mg/L) <0.020 <0.020 0.033 0.032 N/A
Arsenic (mg/L) <0.005 <0.005 <0.005 <0.005 0.05* (mg/L)
Cadmium (mg/L) <0.001 <0.001 <0.001 <0.001 0.01* (mg/L)
Cobalt (mg/L) <0.001 0.006 <0.001 <0.001 N/A
Chromium (mg/L) <0.001 <0.001 <0.001 <0.001 0.5* (mg/L)
Copper (mg/L) <0.001 <0.001 <0.001 <0.001 1.0* (mg/L)
Iron (mg/L) <0.020 4.540 <0.020 <0.020 (Combined iron and manganese total) 1.0* (mg/L)
Manganese (mg/L) 0.183 0.850 0.118 0.016 (Combined iron and manganese total) 1.0* (mg/L)
Nickel (mg/L) 0.003 0.009 0.006 0.003 0.1** (mg/L)
Lead (mg/L) <0.005 <0.005 <0.005 <0.005 0.05* (mg/L)
Zinc (mg/L) <0.001 0.005 0.003 0.003 5.0* (mg/L)
* Environment Protection (Water Pollution) Regulations 1974, emission into inland water.** Australian Water Quality Guidelines for Fresh and Marine Waters 1992.
N/A— no emission limit available.
Table 2
Comparison of analytical results against the Australian and New Zealand Guidelinesfor Fresh and Marine Water Quality 2000
STIEGLITZ SEWAGE LAGOONS ANZECC 2000
Bore hole number SZSL2000/1
SZSL2000/2
SZSL2000/3
SZSL2000/5
IRRIGATION LIVESTOCKDRINKING
AnalyteSTV
(Short-term)LTV
(Long-term)
Standing Water Level (m) 6.51 6.36 7.55 6.89
pH (laboratory) 5.2 5.5 5.3 5.0 **6.0–8.5
Conductivity (µS/cm) 430 594 656 587 (1)(Refer Tables 4.2.3 & 4.2.4)
TDS (mg/L) 226 324 368 331 (2)2,000–10,000(Refer Table 4.3.1)
Bromide (mg/L) 0.71 2.7 0.96 0.20
Chloride (mg/L) 83 110 86 81 (3)MT (Refer Table 4.2.6)MR (Refer Table 4.2.7)
Fluoride (mg/L) <0.02 0.09 <0.02 0.04 4 1
Sulphate (mg/L) 11 36 150 140
NH3-N (mg/L) <0.05 0.34 0.08 <0.05
NO3-N (mg/L) <0.03 <0.03 0.46 0.04
NO2-N (mg/L) <0.10 <0.10 <0.10 <0.10
PO4-P (mg/L) <0.10 <0.10 <0.10 <0.10
Aluminium (µg/L) <20 <20 33 32 20,000 5,000 5,000
Arsenic (µg/L) <5 <5 <5 <5 2000 100 500
Cadmium (µg/L) <1 <1 <1 <1 50 10 10
Cobalt (µg/L) <1 6 <1 <1 100 50 1,000
Chromium (µg/L) <1 <1 <1 <1 1,000*** 100*** 1,000
Copper (µg/L) <1 <1 <1 <1 5,000 200 400-5,000
Iron (µg/L) <20 4540 <20 <20 10,000 200 NST
Manganese (µg/L) 183 850 118 16 10,000 200 NST
Nickel (µg/L) 3 9 6 3 2000 200 1,000
Lead (µg/L) <5 <5 <5 <5 5,000 2,000 100
Zinc (µg/L) <1 5 3 3 5,000 2,000 20,000
Calcium (mg/l) 10.2 22.4 4.3 2.18 1,000
Potassium (mg/l) 1.13 1.63 0.78 0.98
Magnesium (mg/l) 5.98 12.9 2.94 2.10 250–2,000
Sodium (mg/l) 56.3 62.1 68.2 113 (2)MT (Refer Table 4.2.8)
Shaded areas indicate values above relevant guideline levelsNotes: ** set to limit potential for corrosion and fouling of pumping, irrigation and stock watering systems.
*** Chromium (VI)(1) Suitability depends on salt tolerance of crop & calculation of ECse, the average root zone salinity.
ECse depends on soil type & average root zone leaching fraction.(2) Depending on animal type, within this salinity range may be reluctance to drink or may be some
scouring but stock should adapt without loss of production.(3) ES = Suits extremely sensitive crops
MT = Suits moderately tolerant cropsMR = Medium risk of increasing crop cadmium concentrations
STV — Short term trigger value for contaminant in irrigation water (<20 years) useLTV — Long term trigger value for contaminant in irrigation water (100 years) use
Tasmanian Geological Survey Record 2002/09 8
Appendix 1
Engineering logs of boreholes
Tasmanian Geological Survey Record 2002/09 9
EXPLANATION SHEET FOR ENGINEERING LOGS
Borehole and excavation log
Cored borehole log
No resistance
ranging to
refusal
1 2 3
Penetration Water
22 Jan, 80 Water level
Water inflow
Water outflow
on date shown
Notes — samples and tests
U50 Undisturbed sample50 mm diameter
Disturbed sampleD
Standard penetrometerblow count for 300 mm
N
SPT + SampleN*
Material classification
Based on Unified SoilClassification System.
In Graphic Log materials arerepresented by clear contrastingsymbols consistent for each project.
Moisture content
D Dry, looks and feels dry
Moist, no free water on handMwhen remoulding
when remouldingWet, free water on handW
Liquid limitLL
PL Plastic limit
PI Plasticity index
e.g. M>PL — Moist, moisture content
greater than the plastic limit
Hard
Very stiff
Firm
Soft
Very soft
Consistency
F
VSt
H
St
S
VS
Stiff
: hand penetrometer
Fb Friable
50 100–
200 400–
>400
100 200–
25 – 50
<25 (kPa)
Notes: X on log is test result
is range of results
%
Density index
VD
D
MD
L
VL
Very dense
Dense
Very loose
Medium dense
Loose 15 35–
35 65–
85 100–
65 85–
0 15–
Smooth irregular
Smooth planar
Rough irregular
Rough planar
Fracture description
SL
SP
RP
RL
Lugeons
Lugeon units (uL) are a measure
of rock mass permeability. For a
46 to 74 mm diameter borehole
1 Lugeon is defined as a rate of
loss of 1 litre per metre per minute.
1 Lugeon is roughly equivalent to
a permeability of 1 x 10 mm / sec.-4
Casing used
Barrel withdrawn
Case - lift Fluid loss
No loss
100% loss
50% loss
Graphic log
No core
Rock substances represented
by clear, contrasting symbols
consistent for each project.
Fresh
Slightly weathered
Highly weathered
Extremely weathered
Fr
SW
HW
EW
Weathering
Notes: X on log is test result.
index 1 (MPa)
Strength
EH
VH
H
M
L
VL
EL
Extremely high
Very high
High
Medium
Extremely low
Low
Very low 0.03 0.1–
3 10–
0.1 0.3–
1 3–
0.3 1–
< 0.03
>10
point load strength Significant defects
Significant defects shown graphically
Joint
Sheared zone
Crushed seam
Infill seam
Extremely weathered seam
-4
5 (50)
Tasmanian Geological Survey Record 2002/09 10
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
T.O. Bresnehan Pty Ltd
Mr Andrew Ezzy
0.5
1.0
2.0
2.5
3.0
3.5
4.0
1.5
1 2SZSL2001/1
DSample ID
1
DSample ID
2
DSample ID
3
DSample ID
4
D L
L
GRAVEL - orange and light brown
SAND - coarse, black, gravelly, strong organicodour
55 609216 mE5423668 mN
Ben
ton
ite
No
Scr
een
M
SAND - coarse, dark grey, gravelly
LM
Bac
kfi
ll
DSample ID
5
DSample ID
6
GRAVEL - brown
DSample ID
7
GRAVEL - light brown, sandy
DSample ID
8, 9
M S
M S
4.5
GRAVEL - fine, dark grey-brown, sandy
SAND - fine, light brown
SAND - fine, orange, clayey
M
M
M
L
VL
VL
Cem
ent
DSample ID
10
Vertical
GC
GC
SP
SP
GC
GC
SC
SM
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Tertiary sediments
Tertiary sediments
Checked by Mr Adrian Waite
Tasmanian Geological Survey Record 2002/09 11
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
5.5
6.0
7.0
7.5
8.0
6.5
2 2SZSL2001/1
DSample ID
11
DSample ID
12
W L
VL
SAND - coarse, light brown-grey
55 609216 mE5423668 mN
1.4
met
reP
roS
cree
n
W
Bac
kin
fill
SAND - coarse, light brown-grey
End of hole at 8.3 mPumped at 0.4 L/m for 5 minutes.
No
Scr
een
7m
mG
rav
el
Sam
ple
IDn
um
ber
sre
fer
tosa
mp
les
sto
red
inM
RT
core
shed
Vertical
SP
SP Tertiary sediments
Tertiary sediments
Checked by Mr Adrian Waite
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 12
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
0.5
1.0
2.0
2.5
3.0
3.5
4.0
1.5
1 2SZSL2001/2
DSample ID
1
DSample ID
2
DSample ID
3
DSample ID
4
M L
L
SAND - medium, humic, dark-grey, gravelly
CLAY - medium plasticity, mottled dark brownand grey, gravelly
55 609170 mE5423736 mN
No
Scr
een
M
Bac
kfi
ll
DSample ID
5
SAND - coarse, black, gravelly, strong organicodour
M F
4.5
Cem
ent
Vertical
CI
SP
SP Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Checked by Mr Adrian Waite
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 13
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
5.5
6.0
7.0
7.5
8.0
6.5
2 2SZSL2001/2
DSample ID
6
M F
55 609170 E5423736 N
1.4
met
reP
roS
cree
n
7m
mG
rav
el
CLAY - low plasticity, light grey-brown
End of hole at 8.3 m
No
Scr
een
Ben
ton
ite
SAND - fine, light grey W S
FM
M FCLAY - low plasticity, light yellow, silty
CLAY - medium plasticity, light brown
DSample ID
7
DSample ID
8
DSample ID
9
Sam
ple
IDn
um
ber
sre
fer
tosa
mp
les
sto
red
inM
RT
core
shed
Vertical
CL
CL
CI
SM
Tertiary sediments
Tertiary sediments
Tertiary sediments
Tertiary sediments
Checked by Mr Adrian Waite
(As sheet 1)
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 14
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
0.5
1.0
2.0
2.5
3.0
3.5
4.0
1.5
1 2SZSL2001/3
DSample ID
1
DSample ID
2
DSample ID
3
DSample ID
4
M L
L
SAND - medium, humic, dark grey, gravelly
GRAVEL - fine, orange-brown, sandy
55 609292 mE5423770 mN
No
Scr
een
M
Bac
kfi
ll
DSample ID
5
GRAVEL - fine, orange-brown, sandy
M L
4.5
Cem
ent
CLAY - low plasticity, brown, gravelly M F
DSample ID
6
DSample ID
7
DSample ID
8
DSample ID
9
GRAVEL - fine, light brown, clayey M L
M L
M L
M VL
GRAVEL - fine, black, sandy
SAND - fine, brown
SAND - fine, light brown
Vertical
SP
GC
CL
GC
GC
GC
SM
SM
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Tertiary sediments
Checked by Mr Adrian Waite
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 15
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
T.O. Bresnehan Pty Ltd
Mr Andrew Ezzy
5.5
6.0
7.0
7.5
8.0
6.5
2 2SZSL2001/3
55 609292 mE5423770 mN
1.4
met
reP
roS
cree
n
7m
mG
rav
el
End of hole at 8.1 m
No
Scr
een
Ben
ton
ite
SAND - fine, light yellow W VL
W VLGRAVEL - fine, light brownDSample ID
10
DSample ID
11
S.W.L.08/03/01
Bac
kfi
ll
Sam
ple
IDn
um
ber
sre
fer
tosa
mp
les
sto
red
inM
RT
core
shed
Vertical
SM
GC
Tertiary sediments
Tertiary sediments
Checked by Mr Adrian Waite
(As sheet 1)
Tasmanian Geological Survey Record 2002/09 16
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
0.5
1.0
2.0
2.5
3.0
3.5
4.0
1.5
1 2SZSL2001/4
DSample ID
1
DSample ID
2
DSample ID
3
DSample ID
4
D VL
L
SAND - medium, grey, 5 % rounded coarse gravel
GRAVEL - fine, grey, sandy
55 609138 E5423603 N
No
Scr
een
M
Bac
kfi
ll
DSample ID
5
SAND - coarse, grey, 10 % quartzite roundedfine gravel
M VL
4.5
Cem
ent
M VLSAND - coarse, l quartziteight grey, 5% roundedmedium gravel
SAND - coarse, dark brown W S
VLWSAND - coarse, dark brown
DSample ID
6
DSample ID
7
Bac
kfi
ll
1.4
met
reP
roS
cree
n
7m
mG
ravel
S.W.L.08/03/01
Vertical
SP
SP
GC
SP
SP
SP Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Tertiary sediments
Tertiary sediments
Checked by Mr Adrian Waite
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 17
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
5.5
6.0
2 2SZSL2001/4
55 609138 E5423603 N
End of hole due to auger refusal at 6.2 mPumped for 10 minutes at 1.1 L/m.
M HSAND - coarse, black, humic
Bac
kfi
ll
Bac
kfi
ll
Sam
ple
IDn
um
ber
sre
fer
tosa
mp
les
sto
red
inM
RT
core
shed
Vertical
SP Tertiary sediments
(As sheet 1)
Checked by Mr Adrian Waite
Auger refusal may bedue to iron pan?
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 18
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
0.5
1.0
2.0
2.5
3.0
3.5
4.0
1.5
1 2SZSL2001/5
DSample ID
1
DSample ID
2
DSample ID
3
DSample ID
4
M L
VL
SAND - medium, red-orange
SAND - coarse, brown, gravelly
55 609265 E5423613 N
No
Scr
een
M
Bac
kfi
ll
DSample ID
5
GRAVEL - fine, orange, sandy
M L
4.5
Cem
ent
SAND - coarse, red-orange M L
M VLSAND - medium, l mottledight brown, orange
SAND - fine, light brown M VLDSample ID
6
Vertical
SP
GC
SP
SP
SC
SM
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Fill - Reworked Tertiarysediments
Tertiary sediments
Checked by Mr Adrian Waite
T.O. Bresnehan Pty Ltd
Tasmanian Geological Survey Record 2002/09 19
MINERAL RESOURCES TASMANIA
ENGINEERING LOG - BOREHOLEProject
Co-ordinates Drill type
Drill method
Drill fluid
Hole commenced
Hole completed
Drilled by
Logged by
supp
ort
R.L
.
dept
h
grap
hic
log
materialsoil type: plasticity or particle characteristics,colour, secondary and minor components.
notes metres
Borehole no.
Sheet of
wat
er samples,tests
moi
stur
eco
nditi
on
cons
iste
ncy
dens
ity in
dex
structure, geology
Location
R.L.InclinationBearing
clas
sific
atio
nsy
mbo
l
pene
trat
ion
1 2 3
0°0°
Stieglitz sewage lagoons St Helens Point Road, Stieglitz
Auger
Rotary
Nil
8 March 2001
8 March 2001
Mr Andrew Ezzy
5.5
6.0
7.0
7.5
8.0
6.5
2 2SZSL2001/5
55 609265 mE5423613 mN
1.4
met
reP
roS
cree
n
7m
mG
rav
el
End of hole at 8.1m
No
Scr
een
Ben
ton
ite
W VLGRAVEL - fine, light brown
S.W.L.08/03/01
Bac
kfi
ll
DSample ID
7
Bac
kfi
ll
Sam
ple
IDn
um
ber
sre
fer
tosa
mp
les
sto
red
inM
RT
core
shed
Vertical
GC Tertiary sediments
Checked by Mr Adrian Waite
(As sheet 1)
T.O. Bresnehan Pty Ltd
Appendix 2
Raw data collected for slug extraction tests
Stieglitz lagoons recovery pump test — Slug extraction recovery data
Date: 17/08/2001Bore: SZSL 2001/3TD: 8.10 mFlow: 2.1 l/mSWL: 7.63 mStick up: 0.18 m
Recovery data
Time Residual drawdown Measurement
0.00 0.700 8.330.25 0.260 7.890.50 0.180 7.810.75 0.130 7.761.00 0.100 7.731.25 0.070 7.701.50 0.060 7.691.75 0.050 7.682.00 0.045 7.6752.25 0.040 7.672.50 0.030 7.662.75 0.030 7.663.00 0.030 7.663.25 0.025 7.6553.50 0.020 7.653.75 0.020 7.654.00 0.020 7.654.50 0.015 7.6455.00 0.010 7.645.50 0.010 7.646.00 0.005 7.6356.50 0.005 7.6357.00 0.005 7.6357.50 0.005 7.6358.00 0.005 7.635
Tasmanian Geological Survey Record 2002/09 20
Time (minutes)
0.00 4.00 6.00 8.00 10.00
Recovery SZSL 2000/3, 17 August 2001
Re
sid
ua
ld
raw
do
wn
(me
tre
s)
0.001
0.010
0.100
1.000
2.00
Appendix 3
Analytical Services Tasmania — Laboratory reports
Tasmanian Geological Survey Record 2002/09 21
Tasmanian Geological Survey Record 2002/09 22
Appendix 4
Analytical results on site maps
Tasmanian Geological Survey Record 2002/09 23
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
24
Win
dm
ill
Lagoon
656
7
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
656
SZ
SL2001/3
368
SZ
SL2001/2
594
SZ
SL2001/2
324
SZ
SL2001/1
430
SZ
SL2001/1
226
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
587
SZ
SL2001/5
331
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Co
nd
uc
tiv
ity
(S
/cm
)�
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1T
DS
(mg
/L)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
25
Win
dm
ill
Lagoon
5.3
0
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
5.3
SZ
SL2001/3
33
SZ
SL2001/2
5.5
SZ
SL2001/2
<20
SZ
SL
20
01
/15
.2S
ZS
L2001/1
<20
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
5.0
SZ
SL2001/5
32
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
pH
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1
Al
(g
/L)
�
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
26
Win
dm
ill
Lagoon
0.0
8
05
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
0.0
8S
ZS
L2001/3
<5
SZ
SL
20
01
/20
.34
SZ
SL2001/2
<5
SZ
SL2001/1
<0.0
5S
ZS
L2001/1
<5
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
<0.0
5S
ZS
L2001/5
<5
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Am
mo
nia
(mg
-N/L
)
Sti
eg
litz
Se
wag
eL
ag
oo
ns
May
20
01
As
(mg
/L)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
27
Win
dm
ill
Lagoon
0.9
6
20
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
0.9
6S
ZS
L2001/3
4.3
SZ
SL2001/2
2.7
SZ
SL2001/2
22.4
SZ
SL2001/1
0.7
1S
ZS
L2001/1
10.2
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
0.2
0S
ZS
L2001/5
2.1
8
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Bro
mid
e(m
g/L
)
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1C
a(m
g/L
)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
28
Win
dm
ill
Lagoon
<1
1
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
<1
SZ
SL2001/3
86
SZ
SL2001/2
<1
SZ
SL2001/2
110
SZ
SL2001/1
<1
SZ
SL2001/1
83
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
<1
SZ
SL2001/5
81
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Cd
(g
/L)
�
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1C
hlo
rid
e(m
g/L
)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
29
Win
dm
ill
Lagoon
<1
1
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
<1
SZ
SL2001/3
<1
SZ
SL2001/2
<1
SZ
SL2001/2
<1
SZ
SL2001/1
6S
ZS
L2001/1
<1
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
<1
SZ
SL2001/5
<1
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Co
(g
/L)
�
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1
Cr
(g
/L)
�
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
30
Win
dm
ill
Lagoon
<1
1
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
<1
SZ
SL2001/3
<20
SZ
SL2001/2
<1
SZ
SL2001/2
4540
SZ
SL2001/1
6S
ZS
L2001/1
<20
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
<1
SZ
SL2001/5
<20
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Cu
(g
/L)
�
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1
Fe
(g
/L)
�
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
31
Win
dm
ill
Lagoon
<0.0
2
04
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
<0.0
2S
ZS
L2001/3
0.7
8
SZ
SL2001/2
0.0
9S
ZS
L2001/2
1.6
3
SZ
SL2001/1
<0.0
2S
ZS
L2001/1
1.1
3
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
0.0
4S
ZS
L2001/5
0.9
8
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Flu
ori
de
(mg
/L)
Sti
eg
litz
Sew
ag
eL
ag
oo
ns
Ma
y2
00
1K
(mg
/L)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
32
Win
dm
ill
Lagoon
2.9
4
0
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
2.9
4S
ZS
L2001/3
118
SZ
SL2001/2
12.9
SZ
SL2001/2
850
SZ
SL2001/1
5.9
8S
ZS
L2001/1
183
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
2.1
0S
ZS
L2001/5
16
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Mg
(mg
/L)
Sti
eg
litz
Se
wag
eL
ag
oo
ns
May
20
01
Mn
(g
/L)
�
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
33
Win
dm
ill
Lagoon
68.2
3
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
68.2
SZ
SL2001/3
6
SZ
SL2001/2
62.1
SZ
SL2001/2
9
SZ
SL2001/1
56.3
SZ
SL2001/1
3
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
113
SZ
SL2001/5
3
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Na
(mg
/L)
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
200
1
Ni(
g/L
)�
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
34
Win
dm
ill
Lagoon
0.4
6
04
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
0.4
6S
ZS
L2001/3
<0.1
0
SZ
SL2001/2
<0.0
3S
ZS
L2001/2
<0.1
0
SZ
SL2001/1
<0.0
3S
ZS
L2001/1
<0.1
0
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
0.0
4S
ZS
L2001/5
<0.1
0
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Nit
rate
(mg
-N/L
)
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
200
1N
itri
te(m
g-N
/L)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
35
Win
dm
ill
Lagoon
<5
5
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
<5
SZ
SL2001/3
<0.1
0
SZ
SL2001/2
<5
SZ
SL2001/2
<0.1
0
SZ
SL2001/1
<5
SZ
SL2001/1
<0.1
0
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
<5
SZ
SL2001/5
<0.1
0
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Pb
(g
/L)
�
Sti
eg
litz
Se
wag
eL
ag
oo
ns
May
20
01
Ph
osp
ha
te(m
g-P
/L)
NW
=no
wa
ter
NW
=n
ow
ate
r
Tas
man
ian
Geo
logi
cal
Su
rvey
Rec
ord
2002
/09
36
Win
dm
ill
Lagoon
150
0
6000 88mE
6000 88mE
90
90
92
92
94
94
96
96
98
98
542
00
28
mN
542
00
28
mN
30
30
32
32
34
34
36
36
38
38
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
OL
DL
AN
DF
ILL
FO
OT
PR
INT
(AP
PR
OX
.O
NLY
)
SZ
SL2001/3
150
SZ
SL2001/3
3
SZ
SL2001/2
36
SZ
SL2001/2
5
SZ
SL2001/1
11
SZ
SL2001/1
<1
SZ
SL2001/4
NW
SZ
SL2001/4
NW
SZ
SL2001/5
140
SZ
SL2001/5
3
Win
dm
ill
Lagoon
Win
dm
ill
Lagoon
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
20
01
Su
lph
ate
(mg
/L)
Sti
eg
litz
Se
wa
ge
La
go
on
sM
ay
200
1
Zn
(g
/L)
�
NW
=no
wa
ter
NW
=n
ow
ate
r