champion lakes regional recreational park …
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Bowman Bishaw Pty Ltd (ABN 18 009 238 706) as Trustee for the BBG Scientific Services Trust trading as Bowman Bishaw Gorham
CHAMPION LAKES REGIONAL RECREATIONAL PARK
PRELIMINARY ACID SULFATE SOIL INVESTIGATION
Prepared for:
Dept. of Planning and Infrastructure
Albert Facey House
469 Wellington Street
PERTH WA 6000
Prepared by:
Bowman Bishaw Gorham
290 Churchill Avenue
SUBIACO WA 6008
Telephone: (08) 9382 4744
Facsimile: (08) 9382 1177
Report No: S02073
August 2002
Champion Lakes Regional Recreational Park Page No. i Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
TABLE OF CONTENTS
Page No.
1.0 INTRODUCTION 1
1.1 Background 1
1.2 Guidance 2
2.0 OBJECTIVES AND SCOPE OF WORK 3
3.0 INVESTIGATIONS 4
3.1 Sample Collection 4
3.2 Field pH Measurements 4
3.3 Laboratory Measurements 4
3.3.1 Peroxide Oxidation Combined Acidity and Sulfate (POCAS) 5
3.3.2 Chromium Reducible Sulfur (CRS) 5
4.0 RESULTS 6
4.1 Field pH Test Results (pHF and pHFOX) 6
4.2 Laboratory POCAS and CRS Test Results 7
4.3 Groundwater pH 8
5.0 CONCLUSIONS AND RECOMMENDATIONS 9
6.0 REFERENCES 12
Champion Lakes Regional Recreational Park Page No. ii Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
LIST OF TABLES
Table Page No. No.
1 Field pH Assessment Criteria 6
2 Management Plan Action Criteria for Soil Texture Categories 8
LIST OF FIGURES
Figure No.
1 Concept Layout and Soil Investigation Locations
2 POCAS and CRS Summary Results
3 Interpolated Groundwater pH (June 2002)
LIST OF APPENDICES
Appendix A Soil Profile Logs
Appendix B Laboratory Certificates
Champion Lakes Regional Recreational Park Page No. 1 Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
1.0 INTRODUCTION
1.1 Background
The City of Armadale and the Department of Planning and Infrastructure (DPI) jointly
propose to develop a regional multi-purpose water-based recreational park, incorporating
an international standard rowing course, at the site of Wright Lake in Westfield (Figure
1). The proposed site is situated on the Swan Coastal Plain between the Canning and
Southern Rivers and extends over approximately 120ha, including 25ha of land currently
occupied by the lake, with the balance comprising a mixture of pasture and vacant land.
The geology of the study area comprises the Bassendean Sand (sand and silty sand) of
variable thickness underlain by Guildford Formation (sandy clay and clayey sand).
The creation of the park will necessitate the excavation of 2,926,000m3 of in-situ
material from within the development footprint assuming a rowing channel floor
excavation level of 17mAHD (Tabec 19 July 2002). Surplus fill excavated from the
development will be offered to the Main Roads design and construct contractor for the
adjacent Tonkin Highway extension, which is planned for commencement in 2002/03. It
has been inferred from previous investigations (GHD, 2002) that at least 25% of the
excavated soils within the assumed boundaries of the channel will meet Main Roads WA
specifications for embankment construction.
The bulk earthworks program will be delivered by advance dewatering below the water
table of the channel excavation area and use of conventional earthmoving plant.
Consultations held with the Department of Environment, Water and Catchment
Protection (DEWCP), in support of the preparation of the Public Environmental Review
(PER), identified a requirement to investigate the possible occurrence of Potential Acid
Sulfate Soils (PASS) and/or Actual Acid Sulfate Soils (AASS) within the anticipated
excavation areas prior to the commencement of works. This undertaking was not
formerly recognised as an EPA objective at the outset of the scheme.
Although PASS materials are benign while they remain in an anaerobic environment,
their disturbance through excavation or drainage works, can present serious potential
risks to the aquatic and built environments. The conversion of reduced inorganic pyritic
sulfides to sulfuric acid can lead to highly acidic discharges to soils, groundwaters or
surface waters, combined with elevated levels of sulfate and potentially toxic elements
such as aluminium or arsenic.
Champion Lakes Regional Recreational Park Page No. 2 Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
The investigation of the presence, magnitude and extent of PASS/AASS therefore
constitutes an essential component of assessing the potential environmental effects of the
proposed disturbance. In particular, it will assist in the identification of appropriate
management and mitigation strategies to control the associated risks to water quality
within the proposed water bodies and/or fill materials employed for the adjacent
alignment of the Tonkin Highway and other built infrastructure.
1.2 Guidance
The preliminary acid sulfate soil investigation was undertaken with reference to
guidance provided in the following documents:
• C.R. Ahern, M.R. Ahern and B. Powell, 1998. Guidelines for Sampling and
Analysis of Lowland Acid Sulfate Soils (ASS) in Queensland 1998. Queensland
Acid Sulfate Soils Investigation Team (QASSIT), Queensland Department of
Natural Resources and Mines.
• New South Wales Acid Sulfate Soil Management Advisory Committee, 1998.
Acid Sulfate Soil Manual.
• New South Wales Acid Sulfate Soil Management Advisory Committee, 2000.
Acid Sulfate Soils – Keys to Success.
• Gutteridge Haskins and Davey Pty Ltd, 2002. Tonkin Highway Extension –
Champion Lakes: Report on Preliminary Geotechnical Investigation.
• Bulk Earth Works maps and data provided by Tabec Civil Engineering
Consultants (19 July 2002).
Champion Lakes Regional Recreational Park Page No. 3 Preliminary Acid Sulfate Soil Investigation
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2.0 OBJECTIVES AND SCOPE OF WORK
The primary objective of the preliminary investigation was to investigate the presence
and the requirement to manage PASS and AASS within the proposed development.
Towards meeting this objective, the following scope of works was agreed with DEWCP:
• Sampling and analysis of in-situ soils at 7 locations within the curtilage of
Wright Lake and 7 inside the proposed excavation boundaries of the rowing
channel and return lane to a maximum depth of 6m. The sampling transect was
based on conceptual design Option 1B. A preliminary sampling frequency of
10% of the recommended NSW guideline level was discussed and agreed
beforehand with DEWCP.
• Measurement of field pHF and peroxide pHFOX at 25-50cm depth intervals down
the soil profile at each location, to the proposed target depth.
• Laboratory analysis of selected samples using the standardised Peroxide
Oxidation Combined Acidity and Sulfate (POCAS) and Chromium Reducible
Sulfur (CRS) test methods, based on the results of the field testing program.
• Comparison of field and laboratory results with relevant field identification
assessment criteria and acid sulfate soil management plan action criteria
respectively.
• Provide recommendations for further investigation and management plan
requirements to be addressed in advance of the commencement of development.
The assessment of Wright Lake, between Cammillo and Lake View roads, had to be
excluded from the assessment program because the Department of Indigenous Affairs
was unable to approve access within the program schedule. Approval to disturb the lake
bed was not forthcoming in the currency of the investigation.
Champion Lakes Regional Recreational Park Page No. 4 Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
3.0 INVESTIGATIONS
3.1 Sample Collection
Soil samples were retrieved using a drill rig fitted with hollow stem auger and split
spoon sampler at each location, as shown on Figure 1. The geographical co-ordinates of
each auger hole position were recorded using a Global Positioning System.
Samples were recovered at vertical depth increments of between 25-50cm down the
profile at each location. Field descriptions of each sampling horizon were recorded using
the nomenclature of the Australian Soil and Land Survey Field Handbook (McDonald et
al., 1990) (Appendix A), including observations of texture, colour, mottles and, where
present, the abundance and size distribution of any carbonate material in the recovered
sample.
3.2 Field pH Measurements
Field pHF tests were conducted on soil samples at each sampling interval to provide an
indication of the presence of AASS. Each of the soil samples was also oxidised using
hydrogen peroxide and the pHFOX measured after oxidation to assess the presence of
PASS. The vigour of the reaction with peroxide was also recorded.
Investigations into existing groundwater levels and quality within the site in June 2002
included the measurement of pH. The monitoring bores were located remote from the
ASS sampling locations, however, the results were used as an indication of any existing
acidity within the groundwater. A full discussion of groundwater quality is presented in
Appendix H of the PER.
3.3 Laboratory Measurements
Soil samples collected for chemical analysis were placed into glass jars and immediately
sealed to minimise exposure to air and potential moisture loss. Containers were stored in
a clean esky cooler containing ice packs to minimise the potential for sulfide oxidation
in the field. All samples were delivered to the laboratory within 24 hours of collection
and kept frozen until ready to oven dry.
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3.3.1 Peroxide Oxidation Combined Acidity and Sulfate (POCAS)
A total of 30 selected oven-dried soil samples were subjected to the POCAS test method,
which is the standardised test recommended by both the Queensland and NSW
governments.
The POCAS technique measures the sulfur released as sulfate by pyrite oxidation and
the net acidity caused by pyrite oxidation.
3.3.2 Chromium Reducible Sulfur (CRS)
Based on the outcomes of the POCAS test results, two oven-dried soil samples were
analysed using the Chromium Reducible Sulfur method to verify the POCAS test results.
The CRS technique is specific to reduced inorganic sulfur compounds in AASS/PASS
and is not measurably affected by sulfur in organic matter or sulfates.
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4.0 RESULTS
4.1 Field pH Test Results (pHF and pHFOX)
A combination of three factors requires consideration in arriving at a positive
identification of PASS in the field, in accordance with the latest Queensland guidelines,
including the:
• Strength of reaction with hydrogen peroxide.
• Difference between field and peroxide pH measurements (∆pH).
• Absolute value of pHFOX.
In addition to the above, Table 1 presents the following simple assessment matrix
criteria, as devised by the Acid Sulfate Soils Management Advisory Committee of NSW
(ASSMAC, 2000), may also be applied to assist in the preliminary identification of
PASS and AASS.
Table 1
Field pH Assessment Criteria
pH Measurement Type
AASS PASS Neither AASS or PASS
pHF < 4 > 4 > 4 pHFOX < 4 < 4 > 4
On the basis of the above assessment criteria, the following conclusions were drawn in
respect of the field data results:
• 79 of the 85 samples subjected to field testing (or 93% of total) exhibited pHF
and pHFOX results, which were not indicative of PASS or AASS. The equivalent
laboratory pH results showed relatively poor correlation with the field data, but
nonetheless also confirmed the very low incidence of PASS within the sampled
soil horizons.
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BOWMAN BISHAW GORHAM
• Positive field tests were obtained for 6 samples (or 7% of total), which showed
pHF and pHFOX results indicative of the presence of PASS. Recorded pH
differences (between pHF and pHFOX) for these samples ranged from 0.7 and 3.8,
providing a negligible to significant indication of the presence of PASS.
• With the exception of sample ASS12-1, no other field peroxide pHFOX values
were recorded less than 3, which is generally considered as the pH value below
which PASS may be strongly suspected.
• Laboratory pH results similarly indicated the presence of PASS at a single
location in sample ASS12-1.
4.2 Laboratory POCAS and CRS Test Results
Laboratory POCAS and CRS results are presented in Figure 2. Of the 30 soil samples
selected for analysis based on field test observations, only 1 sample (ASS12-5) exhibited
analytical results representative of PASS. In this case, the peroxide oxidisable sulfur
level (SPOS = 0.083%) showed good correlation with the chromium reducible sulfur
result (SCR = 0.07%), which confirms the significant sulfidic potential of the soil at this
location.
Albeit sample ASS12-1 showed high total potential acidity (TPA = 388 moles H+/tonne)
and a significant pH drop on oxidation, this was not reflected in the sulfur trail. Further
confirmatory analysis using the chromium reducible method (SCR = 0.002%) showed
that the soil was not a PASS material, with the observed acid generation being attributed
to organic matter rather than sulfide. The presence of organic acidity in ASS12-1 was
consistent with the peaty nature of the soil recorded at this location.
At location ASS12-5, sulfidic sulfur and acid concentrations exceeded the accepted
action criteria adopted in the Queensland guidelines (Table 2) when PASS disturbed at a
site requires management (i.e. SCR+STAA > 0.03% and SCR+TAA > 18 moles H+/tonne).
The observed exceedences for ASS12-5 were of the order of 2.4-fold the respective
guideline values for coarse textured and loamy sands, therefore triggering a requirement
to prepare an Acid Sulfate Soils Management Plan (ASSMP) in support of any future
dewatering and excavation program.
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Calcium and magnesium test results indicated that all soils have minimal self
neutralising capacity.
Table 2
Management Plan Action Criteria for Soil Texture Categories
Type of Material Action Criteria (<1000 tonnes)
Action Criteria (>1000 tonnes)
Existing + Potential Acidity Existing + Potential Acidity
Texture Approx. Clay
Content
(%<0.002mm)
Sulfur Trail
%S Oxidisable
(STAA + SCR)
Acid Trail
mol H+/tonne
(TAA + a-SCR)
Sulfur Trail
%S Oxidisable
(STAA + SCR)
Acid Trail
mol H+/tonne
(TAA + a-SCR)
Coarse Texture (sands
to loamy sands)
� 5
0.03
18
0.03
18
Medium Texture (sandy
loams to light clays)
5 - 40
0.06
36
0.03
18
Fine Texture (medium to heavy clays and silty clays)
� 40
0.1
62
0.03
18
4.3 Groundwater pH
Field monitoring of groundwater levels and quality reported in Appendix H of the PER
indicate moderately acid to neutral groundwater pH within the site. Figure 3 shows an
interpolation using the GMS modelling package of measured groundwater pH across the
site. The lowest pH (3.7) was recorded in the vicinity of ASS sampling location ASS12,
where sulfidic sulfur and acid concentrations exceeded the accepted action criteria. It is
believed that the groundwater acidity may result from the seasonal fluctuation of the
watertable exposing PASS material to air for a period during which some oxidation to
AASS occurs. The oxidation process is expected to desist when the soil becomes
saturated as the watertable rises.
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5.0 CONCLUSIONS AND RECOMMENDATIONS
Field and laboratory tests indicate PASS are absent over most of the area sampled.
Further intrusive investigations will be required in advance of the commencement of
earthworks to:
• Delineate the lateral and vertical extent of PASS material in the locality of
ASS12 and relate the presence of PASS to the interpolated extent of acidic
groundwater.
• Establish the spatial and vertical distribution of PASS and/or AASS in the lake
sediments of Wright Lake, which has not been investigated to date due to access
restrictions.
Given that the original sampling transect was based on the Option 1B conceptual
earthworks layout, which has since been superceded, consideration should also be given
to sampling areas now earmarked for excavation. DEWCP should be consulted and the
test work incorporated into the management plan objectives for the site.
The detection of PASS within the profile at location ASS12 indicates the requirement to
prepare a formal Acid Sulfate Soil Management Plan (ASSMP) in support of proposed
earthworks programs. Whilst ASS12 is now situated in land which will not be excavated
under the revised engineering design, PASS deposits may extend outward from this
location and encroach upon adjacent proposed recreational water bodies. Dewatering
activities carried out in the vicinity of ASS12 also have the potential to liberate
additional acidity into the groundwater environment if inappropriately managed.
The primary objective of the ASSMP should be to provide a framework of practical and
achievable monitoring and control strategies, within which future development can be
guided, such that no unacceptable effects will occur to human health or the environment
from the disturbance of soils within the proposed development area.
Champion Lakes Regional Recreational Park Page No. 10 Preliminary Acid Sulfate Soil Investigation
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Key areas to be addressed in the ASSMP to facilitate the appropriate management of
potential acid sulfate soils on-site will include details of:
• Proposals for further investigation to develop more accurate data on the extent,
depth and characteristics of any acid sulfate soils, having due regard to the
outcomes of the preliminary investigation and the variation between Option 1B
and the preferred conceptual design.
• Proposed prevention, minimisation and mitigation strategies for controlling
environmental impacts caused by dewatering and excavation operations,
including, but not limited to:
- treatment and use of any excavated material (including strategic burial
considerations).
- treatment of acidity.
- containment strategies to manage site runoff and infiltration.
- techniques for managing water table height.
- management of any existing acidity and contamination being produced.
• Proposed monitoring programs for surface waters and groundwaters and remedial
measures to mitigate potential impacts caused by disturbance of PASS.
• Implementation responsibilities for environmental management.
• Reporting requirements and auditing responsibilities to ensure that agreed
performance objectives are met, including quality assurance considerations.
• Contingency measures to rectify any deviation from the agreed performance
standards.
For the purpose of this document and the management of PASS, it could be assumed
here that the entire bed of Wright Lake contains PASS. If this were the case, which
appears unlikely based on preliminary groundwater pH readings, then all PASS would
be managed, as required, in accordance with the relevant ASSMP to be approved by the
regulatory authorities.
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At present, the preferred management option for any PASS recovered from below
Wright Lake is strategic reburial below the liner of the IRC, beneath the permanent
watertable, to maintain anaerobic conditions in the long term.
As noted previously sampling for PASS from Wright Lake has been precluded due to
access restrictions. The lake currently contains approximately 600mm of water, and if
approvals were received to allow sampling prior to summer 2002/03, this would require
a barge-mounted drill rig at considerable cost.
Given that no earthworks will occur within the site until at least July, 2003, and that the
proponent has committed to manage any PASS and AASS irrespective of the volume of
soils generated, it is considered reasonable to conclude that the final determination of
whether PASS do occur below Wright Lake be conducted when the lake is dry, most
likely in February or March 2003.
If PASS are identified by the forthcoming sampling regime, then they will be managed
in accordance with the Construction Management Plan, and ASSMP, as approved by the
regulatory authorities.
Champion Lakes Regional Recreational Park Page No. 12 Preliminary Acid Sulfate Soil Investigation
BOWMAN BISHAW GORHAM
6.0 REFERENCES
C.R. Ahern, M.R. Ahern and B. Powell, 1998. Guidelines for Sampling and Analysis of
Lowland Acid Sulfate Soils (ASS) in Queensland 1998. Queensland Acid Sulfate
Soils Investigation Team (QASSIT), Queensland Department of Natural Resources
and Mines.
New South Wales Acid Sulfate Soil Management Advisory Committee, 1998. Acid
Sulfate Soil Manual.
New South Wales Acid Sulfate Soil Management Advisory Committee, 2000. Acid
Sulfate Soils – Keys to Success.
Gutteridge Haskins and Davey Pty Ltd, 2002. Tonkin Highway Extension – Champion
Lakes: Report on Preliminary Geotechnical Investigation.
Department of Environment, Water and Catchment Protection, 2002. Draft DEWCP and
EPA Guidance on Acid Sulfate Soils
FIGURES
Figure 2
POCAS and CRS Summary Results
Figure 3Interpolated pH in Groundwater
June 20020 1000
metres
pH
4.0
4.3
4.6
4.9
5.2
5.5
5.8
6.1
6.4
6.7
ASS14
ASS13
ASS11
ASS10
ASS9
ASS8
B16B15
B12
B8
ASS12
B4
B1
LWPZ1
LW6
LW5
LW4
LW3
LW2
LW1
KIRK1
KIN1
STGEO1
GERT1
ASS12
B4 Groundwater Monitoring Bores
Acid Sulfate Soils Field Investigation Sites
APPENDIX A
Soil Profile Logs
PROJECT NUMBER: S02073 DATE: 17.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 8.00
LOCATION ID: ASS 8 WEATHER: Fine/Cloudy
AREA NAME: End Cammillo Rd METHOD: Hollow Stem Auger and Split Spoon
SCIENTIST: C. Powell TOTAL DEPTH: 6m
EASTING: 405 578 NORTHING: 644 7620 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS8-1 0/25 Brown Fine/Medium Clayey Sand 6.25 5.35 Negligible
25/50 Brown - Orange Fine/Medium Clayey Sand
ASS8-2 50/75 Orange Fine/Medium Clayey Sand 6.40 6.20 Moderate
75/100 Orange Fine/Medium Clayey Sand
ASS8-3 100/125 Orange Fine/Medium Clayey Sand 6.50 5.95 Moderate
125/150 Orange Fine Clayey Sand
ASS8-4 150/175 Orange Fine Clayey Sand 6.84 5.27 Moderate
175/200 Pale Orange Fine Clayey Sand
ASS8-5 200/225 Pale Orange Fine Clayey Sand 7.30 5.56 Moderate
225/250 Pale Orange Fine Clayey Sand
ASS8-6 250/280 Pale Orange Fine Clayey Sand (some gravel) 5.91 5.27 Negligible
ASS8-7 280/320 Yellow Orange Fine Clayey Sand 5.64 5.32 Negligible
ASS8-8 320/360 Yellow Orange Fine Clayey Sand 5.38 5.24 Negligible
ASS8-9 360/400 Yellow Grey Fine Sandy Clay Loam 6.07 6.47 Moderate
400/425 Yellow Grey Fine Sandy Clay Loam 5.82 5.48 Slight
ASS8-10 425/450 Yellow Grey Fine Sandy Clay Loam
450/475 Yellow Grey Fine Sandy Clay Loam
ASS8-11 475/500 Grey Gravely Sand 7.55 4.99 Negligible
475/500 Pale grey Clayey Sand
500/520 Pale grey Clayey Sand
ASS8-12 520/550 Yellow Clayey Sand and Gravel 5.38 5.11 Moderate
550/575 Pale Yellow Grey Clayey Sand
ASS8-13 575/600 Pale Yellow Grey Clayey Sand 5.39 5.12 Negligible
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 17.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 16.00
LOCATION ID: ASS 9 WEATHER: Fine
AREA NAME: Rear Duck farm METHOD: Hollow Stern Auger and Split Spoon
SCIENTIST: C. Powell TOTAL DEPTH: 6m
EASTING: 405 236 NORTHING: 644 7289 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR SAND TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS9-1 0/25Brown Silty Sand to Grey Silty
SandMedium/Fine 6.62 5.05 Slight
25/50Orange Mottled Grey Silty
SandMedium/Fine
ASS9-2 50/75 Orange Mottled Grey Silty Sand
Medium/Fine 6.82 5.12 Slight
75/100 Pale Grey Silty Sand Medium/Fine
ASS9-3 100/125 Grey/Yellow Mottled Clayey Sand
Medium/Fine 6.68 5.37 Slight
125/140 Grey/Yellow Mottled Clayey Sand
Medium/Fine
140/160 Orange Clayey Sand Medium/Fine 6.33 5.29 Negligible
ASS9-4 160/200 Pale Yellow Sand Medium
ASS9-5 200/250 Pale Grey Sandy Clay Medium/Fine 6.45 5.23 Negligible
250/275 Pale Grey Sandy Clay Medium/Fine
ASS9-6 275/300 Clayey Sand Pale Grey Medium/Fine 6.19 5.05 Slight
300/325 Clayey Sand Pale Grey Medium/Fine
ASS9-7 325/350 Clayey Sand Pale Grey Medium/Fine 5.79 4.65 Slight
370/375 Clayey Sand Pale Grey Medium/Fine
ASS9-8 375/400 Clayey Sand Pale Grey Medium/Fine 5.79 4.86 Slight
400/450 Clayey Sand Pale Grey Medium/Fine
ASS9-9 450/480 Pale Grey Sandy Clay Medium/Fine 5.57 3.60 Slight
480/510 Pale Grey Clayey Sand Medium/Fine
ASS9-10 510/550 Pale Grey Clayey Sand Medium/Fine 5.86 3.70 Slight
ASS9-11 550/600 Pale Grey Clayey Sand Medium/Fine 5.02 3.64 Slight
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 21.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 8.00
LOCATION ID: ASS 10 WEATHER: Cloudy
AREA NAME: End Cammillo Rd METHOD: Hollow Stem Auger and Split Spoon
SCIENTIST: C. Powell TOTAL DEPTH: 6m
EASTING: 404 890 NORTHING: 644 6916 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS10-1 0/25 Brown Clayey Sand Medium/Fine 4.60 4.90 Slight
25/50 White/Pale Grey Silty Sand Fine
ASS10-2 50/75 White/Pale Grey Silty Sand Fine 5.10 5.50 Slight
75/100 White/Pale Grey Silty Sand Fine
ASS10-3 100/125 Yellow Sandy ClayMedium Sand Medium Loose
Clay6.30 5.60 Negligible
125/150 Yellow Sandy ClayMedium Sand Medium Loose
Clay
ASS10-4 150/180 Orange Gravelly Clay Cohesive/Dense 6.20 5.60 Negligible
180/200 Grey/Brown Sandy Clay Cohesive/Dense
ASS10-5 200/225 Grey/Brown Sandy Clay Cohesive/Dense 6.50 4.90 Slight
225/250 Grey/Brown Sandy ClayMedium Sand Unconsolidated
Clay
ASS10-6 250/275 Grey/Brown Sandy ClayMedium Sand Unconsolidated
Clay6.40 3.90 Slight
275/300 Pale Grey Sandy Clay Fine/Firm
ASS10-7 300/325 Pale Grey Sandy Clay Fine/Firm 6.40 5.30 Slight
325/350 Pale Grey Sandy Clay Fine/Firm
ASS10-8 350/375 Pale Grey Sandy Clay Fine/Firm 6.20 5.50 Negligible
375/400 Pale Grey Sandy Clay Fine/Firm
400/420 Pale Grey Sandy Clay Fine Sand Unconsolidated Clay
ASS10-9 420/440 Pale Grey Sandy Clay Firm 6.10 5.40 Negligible
440/450 Pale Grey Sandy Clay Firm
450/500 Grey Brown Clayey Sand Medium/Fine
ASS10-10 500/525Pale Grey/Off White Clayey
SandMedium/Fine 7.10 5.40 Slight
525/550 Pale Grey Clayey Sand Medium/Fine
ASS10-11 550/575 Pale Grey Sandy Clay Medium/Fine 6.50 5.30 Slight
575/600 Pale Grey Clayey Sand Medium/Fine
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 20.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 13.00
LOCATION ID: ASS 11 WEATHER: Cloudy
AREA NAME: Sand Dunes METHOD: Hollow Stem Auger and Split Spoon & SPT
SCIENTIST: C. Powell TOTAL DEPTH: 6 mbgl
EASTING: 404 544 NORTHING: 644 6537 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS11-1 0/25 Brown Silty Organic Medium/Fine 4.80 5.00 Slight
25/50Pale Grey Brown
Silty Medium/Fine
ASS11-2 50/75Pale Grey Brown
Silty Medium/Fine 4.60 4.80 Slight
75/100 Pale Grey Silty Medium/Fine
ASS11-3 100/125 Pale Grey Silty Fine 4.80 5.30 Slight
125/150 Pale Grey Silty Fine
ASS11-4 150/175Pale Grey Brown
Clayey Sand Fine 5.90 5.20 Negligible
175/200Pale Grey Brown
Clayey Sand Fine
ASS11-5 200/300Pale Grey Brown
Clayey Sand Fine 5.90 5.20 NegligiblePale Grey to Brown
Clayey Sand Fine
ASS11-6 300/325Pale Grey/Off White
Clayey Sand Fine 6.10 5.20 Negligible
ASS11-7 325/350 Grey Sandy Clay Fine 6.20 5.00 Negligible
ASS11-8 350/375Pale Brown Clayey
Sand Fine 6.30 5.20 Negligible
375/400Pale Grey Sandy
Clay Medium sand - consolidated clay
400/425Layered with Pale Grey Clayey Sand Medium sand - consolidated clay
ASS11-9 425/450Layered with Pale Grey Clayey Sand Medium sand - consolidated clay 6.20 5.00 Slight
ASS11-10 450/475Layered with Pale Grey Clayey Sand Medium sand - consolidated clay 6.00 5.30 Slight
475/500 Pale Grey Clayey
Sand Fine
ASS11-11 500/525Pale Grey Clayey
Sand Fine 6.10 5.20 Negligible
525/550Pale Grey Clayey
Sand Fine
ASS11-12 550/575Pale Grey Clayey
Sand Fine 6.20 5.20 Negligible
575/600Pale Grey Clayey
Sand Fine
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 20.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 8.00
LOCATION ID: ASS 12 WEATHER: Fine/Cloudy
AREA NAME: Sheep Paddock METHOD: Hollow Stem Auger and Split Spoon & SPT
SCIENTIST: C. Powell TOTAL DEPTH: 6 mbgl
EASTING: 404 850 NORTHING: 644 6473 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS12-1 0/25 Grey/Brown Silty Organic Medium/Fine 4.60 3.90 Slight
25/50 Pale Grey/Off White Fine
ASS12-2 50/75 Pale Grey/Off White Fine 4.30 4.80 Negligible
75/100 Pale Grey/Off White Fine
ASS12-3 100/125 Pale Grey/Off White Fine 4.30 4.80 Negligible
125/150 Pale Grey/Off White Fine
ASS12-4 150/175 Grey/Brown Clayey Fine 5.50 4.80 Negligible
ASS12-5 175/200 Brown Clayey Coffee Sand Fine with Gravel 5.50 3.90 Slight
200/250 no sample recovered
ASS12-6 250/275 Pale Grey (Brownish) Fine 5.40 1.60 Negligible
275/300 Pale Grey Sandy Clay Consolidated
ASS12-7 300/325 Pale Grey Sandy Clay Consolidated 5.50 4.30 Negligible
325/350 Pale Grey Sandy Clay Consolidated
ASS12-8 350/375All with Lenses of Pale Grey
Clayey Sand 5.70 4.70 Negligible
375/400All with Lenses of Pale Grey
Clayey Sand
ASS12-9 400/425All with Lenses of Pale Grey
Clayey Sand 5.90 4.50 Negligible
425/450All with Lenses of Pale Grey
Clayey Sand
ASS12-10 450/475All with Lenses of Pale Grey
Clayey Sand 5.70 4.50 Negligible
475/500
ASS12-11 500/525 5.60 4.50 Negligible
525/550
ASS12-12 550/575 5.70 4.50 Negligible
575/600
COMMENTS
Layers of Pale Grey Sandy Clay & Clayey Sand Throughout
Medium/Fine sand
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 17.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 12.30
LOCATION ID: ASS 13 WEATHER: Fine
AREA NAME: Duckfarm South METHOD: Hollow Stem Auger and Split Spoon
SCIENTIST: C. Powell TOTAL DEPTH: 6 mbgl
EASTING: 405 414 NORTHING: 644 6956 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS13-1 0/25 Pale Grey Silty Sand, Orange Mottles Fine/Medium 6.91 5.13 Slight
25/50 Pale Grey Silty Sand, Orange Mottles
ASS13-2 50/75 Pale Grey Silty Sand, Orange Mottles Fine/Medium 5.61 4.34 Negligible
75/100 Pale Grey Silty Sand, Orange Mottles
100/125 Pale Grey Silty Sand, Orange Mottles Fine/Medium
ASS13-3 125/150 Mottled Orange and Grey Sand Fine 4.49 4.75 Slight
150/175 Mottled Orange and Grey Sand Fine
ASS13-4 175/200 Orange/Yellow Sand Clayey Sand Fine/Medium 4.24 4.73 Slight
200/225 Orange/Yellow Sand Clayey Sand
ASS13-5 225/250 Yellow Clayey Sand Gravel Fine 4.08 4.30 Slight
250/275 Yellow Clayey Sand Gravel Fine
ASS13-6 275/300 Yellow Clayey Sand Gravel Fine 4.43 4.57 Slight
300/325 Yellow Clayey Sand Gravel Fine
ASS13-7 325/360 Grey Clayey Sand with Red mottles Fine 4.27 4.12 Slight
360/375 Grey Clayey Sand with Red mottles
ASS13-8 375/400 Grey Sandy Clay Medium/Fine 5.03 4.08 Negligible
400/425 Grey Sandy Clay
ASS13-9 425/450 Grey Sandy Clay Medium/Fine 5.58 4.58 Negligible
450/475 Grey Sandy Clay Medium/Fine
ASS13-10 475/500 Grey Sandy Clay Medium/Fine 5.55 4.46 Negligible
500/525 Grey Sandy Clay Medium/Fine
ASS13-11 525/550 Grey Sandy Clay Medium/Fine 5.49 5.45 Negligible
550/575 Grey Sandy Clay Medium/Fine
ASS13-12 575/600 Grey Sandy Clay Medium/Fine 6.02 4.73 Negligible
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
PROJECT NUMBER: S02073 DATE: 21.05.02
PROJECT NAME: Champion Lakes ASS Investigation TIME: 11.20
LOCATION ID: ASS 14 WEATHER: Fine
AREA NAME: SSW Incline to Lake METHOD: Hollow Stem Auger and Split Spoon
SCIENTIST: C. Powell TOTAL DEPTH: 6mbgl
EASTING: 405 850 NORTHING: 644 7423 STORAGE:
SAMPLE ID DEPTH (cm) COLOUR TEXTURE pH FIELD pH OXIDISED PEROXIDE REACTION
ASS14-1 0/25Yellow Brown Orange Clayey
Sand Medium/Fine 5.60 5.00 Slight
25/50Pale/Brown Silty Sand with
Organics Medium/Fine
ASS14-2 50/75 Yellow Clayey Sand Medium/Fine 6.20 5.20 Slight
ASS14-2a 75/100 Orange Gravely/Sand Medium/Fine, Gravel 5.50 5.10 Slight
ASS14-3 100/125Orange Cemented Laterite
Gravel Medium/Fine, Gravel 5.80 5.30 Slight
ASS14-4 125/150 Pale/Grey Off White Sand Fine 5.30 5.40 Slight
150/175 Pale Grey Off White Clayey Medium
ASS14-5 175/200 Orange Gravely Clayey Sand Gravel Clay 5.60 5.30 Slight
ASS14-6 200/225 Pale Grey Clayey Sand Fine 5.50 5.50 Slight
225/250 Pale Grey Sandy Clay Fine dense
250/275 Pale Grey Clayey Sand Fine
ASS14-7 275/300 Pale Grey Sandy Clay Fine 5.70 5.50 Negligible
300/325 Pale Grey Sandy Clay Medium/Fine
ASS14-8 325/350 Pale Grey Sandy Clay Medium/Fine 5.60 5.50 Negligible
350/375 Pale Grey Sandy Clay Medium/Fine
ASS14-9 375/400 Pale Grey Sandy Clay Medium/Fine 6.20 5.60 Negligible
400/425 Pale Grey Clayey Sand Medium/Fine
ASS14-10 425/450 Pale Grey Clayey Sand Medium/Fine 6.20 5.50 Negligible
ASS14-11 450/500 Yellow Clayey Sand Medium/Fine 5.70 5.30 Negligible
ASS14-12 500/575 Yellow Clayey Sand Medium/Fine 5.50 5.30 Negligible
ASS14-13 575/600 Yellow Clayey Sand Medium/Fine 5.50 5.30 Negligible
COMMENTS
ACID SULPHATE SOILS FIELD TESTING LOG
APPENDIX B
Laboratory Certificates