DEPARTMENT INFRASTRUCTURE, Helping Australia ENERGY

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.


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.


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.


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.


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]


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.


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


Appendix 1

Engineering logs of boreholes


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)


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






Tertiary sediments

Tertiary sediments

Checked by Mr Adrian Waite





Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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







Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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









Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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


(As sheet 1)






Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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








Tertiary sediments







Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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 2SZSL2001/3

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


(As sheet 1)





Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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




Tertiary sediments

Tertiary sediments







Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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)


Auger refusal may bedue to iron pan?






Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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






Tertiary sediments







Drill method

Drill fluid

Hole commenced

Hole completed

Drilled by

Logged by

supp

ort

R.L

.

dept

h

grap

hic

log


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


clas

sific

atio

nsy

mbo

l

pene

trat

ion

1 2 3

0°0°


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


(As sheet 1)


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


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



Appendix 4

Analytical results on site maps


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

Documents

DEPARTMENT INFRASTRUCTURE, Helping Australia ENERGY