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1 of 82 APPENDIX 2

GEO & HYDRO PTY LTD REPORT NO. Vgl-lie.doc, JUNE 1995

2 of 82 GEO & HYDRO PTY LTD ACN: 059 305 439 Excellence In Environmental Engineering

CONFIDENTIAL

ENVIRONMENTAL SITE ASSESSMENT

SITE 1

KAMAROOKA DRIVE ESTATE

WATTLE GLEN

VICTORIA

Prepared for: Prepared by: Rojim Lands Pty Ltd Geo & Hydro Pty Ltd d- I.J. Rickards, Darnley & Co Pty Ltd 1 14-1 18 Capel Street 320 Hallam North Road NORTH MELBOURNE VIC 3051 ENDEAVOUR HILLS VIC 3802 Project No: V9l/l/ie Report No: V91-1 ie.doc Date: June 1995

VIC 114-1 18 Capel Street, North Melbourne, 3051 Phone: (03) 326 991 1 Fax: (03) 326 91 18 NSW FAC House 246 Keith Smith Avenue, Mascot, 2020 Phone: (02) 667 0255 Fax: (02) 6673 of 820736 QLD 33 Curtin Avenue West, Eagle Farm, 4009 Phone: (07) 868 2564 Fax: (07) 268 6658 AUSTRALIA WIDE 1800 81 1 088 4 of 82 CONFIDENTIAL

The environmental site assessment was carried out at Kamarooka Drive Estate, Wattle Glen, Victoria, between November 1994 and March 1995. The investigation was carried out with the aim of enabling a Certificate of Environmental Audit to be obtained for the site.

The results of the soil sampling confirm that the site is free of significant cyanide, OC, lead, arsenic, cadmium and mercury contamination to a level consistent with the limits referred to in the Australian and New Zealand Guidelines for the Assessment and Management of Contaminated Sites (ANZECC).

Groundwater laboratory analysis. results confirm that the underlying groundwater is free of cyanide contamination. The detectable arsenic concentration recorded in one of the groundwater samples is within quality limits fo; irrigation and livestock water use. The concentration marginally exceeds the raw water quality guideline, however it is considered unlikely that the water is or will be used for human consumption due to its high salinity and high iron content.

Page - 2 5 of 82 09lV/001/IN 1E SITE LOCATION MAP

MELWAY REFERENCE: 12 G-5

copvriohl Melway Publishing Pty ud. Repmducad from MeIwly sbeet LXredmy Edii21 wim permission.

6 of 82 CONFIDENTIAL

Page No. Executive Summary 2

1.o Introduction 4 1.1 Background 4 1.2 Objective 4 1.3 Scope of Works 4

2.0 Background Data 6 2.1 Introduction 6 2.2 Site Description and History 6 2.3 Regional Geology and Hydrogeology 7 2.4 Cyanide Waste - Background Data a 2.4.1 Nature of Waste a 2.4.2 Method of Disposal a 2.4.3 Chemical Properties of Cyanide a

3.0 Summary of Site Investigation Activities 9 3.1 Introduction 9 3.2 Site Inspection 9 3.3 Soil Sampling 9 3.4 Groundwater Well Installation 10 3.5 Laboratory Analysis 10 3.5.1 Soil Samples 11 3.5.2 Groundwater Samples 11 3.6 Quality Procedures 11

4.0 Results of Investigation 12 4.1 Site Inspection and Field Observations 12 4.2 Local Geology and Hydrogeology 12 4.2.1 Geological Profile 12 4.2.2 Hydrogeology 13 4.3 Laboratory Analysis Results 13 4.3.1 Acceptance Criteria 13 4.3.2 Soil Samples 13 4.3.3 Groundwater 14 4.3.4 Quality Control Samples 15

5.0 Conclusions 17

6.0 Limitations 18

APPENDIX A: Soil sample details APPENDIX B: Sample forms and analytical results APPENDIX C: Well logs APPENDIX D: Photographs APPENDIX E: Topographical maps and cross section APPENDIX F: Groundwater data APPENDIX G: Certificate of title APPENDIX H: Development plans APPENDIX I: Register of contaminated sites APPENDIX J: Environmental site assessment protocols APPENDIX K: Glossary

Page - 3 7 of 82 CONFIDENTIAL

I.1 Background

In November 1994, Rojim Lands Pty Ltd c/- I.J. Rickards Damley & Co engaged Geo & Hydro Pty Ltd to carry out an environmental site assessment at Kamarooka Drive Estate, Wattle Glen, Victoria.

A strategy for the site assessment was outlined by the Environmental Auditor is his letter to Geo & Hydro of 5 September 1994. Following completion of the desk study and site inspection, the scope of the site investigation was finalised at a meeting with the EnvironmentalAuditor on 3 February 1995.

The investigation was undertaken on 7 and 19 February, and 8 March 1995 and involved soil sampling at 40 locations, installation of a groundwater monitoring well and groundwater sampling. Selected samples were sent for laboratory analysis to establish the quality of soil and groundwater at the site.

1.2 Objective

The objective of the investigation was to determine the nature and extent of potential soil and groundwater contamination caused by past activities at the site with a view of removal of individual lots from the Contaminated Site Register.

Following completion of site assessment work, Geo 8 Hydro were to prepare a project report for review by the Environmental Auditor with the aim of obtaining a Certificate of Environmental Audit for the site.

1.3 Scope of Works

The following scope of works includes all works to be covered by Geo & Hydro in the field and in this report as part of the site assessment program for Kamarooka Drive Estate, Wattle Glen, Victoria (refer also OCS 091V/001/IN 1E): Desk study. Site inspection. Design of soil sampling program with Environmental Auditor. Soil sampling:

0 describe sub surface geology collect soil samples at 0-0.2 and 0.2-0.5 m depth from each individual lot. Groundwater well installation and sampling. Laboratory analysis of soil and groundwater samples for heavy metals, total cyanide, organochlorine pesticides (soil samples only) and pH. Preparation of drafi and final site assessment reports for review by Environmental Auditor.

Page - 4 8 of 82 CONFIDENTIAL Note: The original scope of work outlined in our proposal of 14 September 1994 (ref. BV20Vl.doc) has been revised on the basis of the results of the desk study and site inspection, as recommended by the Environmental Auditor.

Page - 5 9 of 82 CONFIDENTIAL BA

2.1 Introduction

Background information related to the site was collected as part of the desk study forming phase 1 of the site assessment. Information was obtained on site history, topography, regional geology and hydrogeology, cyanide waste disposal and characteristics of the waste.

The information was sourced from various sources including Government departments, the Department of Mines, Department of Energy & Minerals, Rural Water Corporation (RWC), Environment Protection Authority of Victoria (EPAV), Nillumbik Shire Council and published geological and topographical maps.

The site development plans and maps showing mine shaft location were supplied by I.J. Rickards, Damley & Co Pty Ltd (refer Appendix H).

2.2 Site Description and History

The site is located in Kamarooka Drive Estate, Wattle Glen, Victoria, in the area zoned Residential C. The surrounding land is mainly used for residential purposes.

The site is situated in a hilly area with an old mine positioned on the crest of a hill. A topographical cross section through the area of interest is shown in figure El (Appendix E).

Data regarding site history was collected and reviewed prior to site investigation activities to establish potential sources and areas of soil and groundwater contamination. A summary of the site history is presented below:

Previous land use activities included rural land grazing and gold mining.

A mine shaft existing on the property is reported to have been abandoned before the 1950s.

Between August 1953 and January 1965, General Motors Holden (GMH) disposed of approximately 12 tons of cyanide contaminated waste (cyanide salts) in the disused mine shaft. At the same time, the cyanide wastes were also disposed of to the disused mine shafts adjacent to Mine Road, Nutfield. The total amount of cyanide contaminated waste buried in the shafts in the Shire of Eltham was approximately 300 tons.

The.disposal operations were camed out with approval of the Minister of Mines. The disposal of cyanide contaminated wastes continued until 1965 when the Commission of Public Health changed its policy and informed GMH that the practice would no longer be permitted (Shugg, 1981l).

Shugg. A.. 1981 - An incidence of cyanide waste disposal in mine shafts. Victorian Department of Minerals 8 Energy unpublished report 19811105 Page - 6 10 of 82 CONFIDENTIAL The potential contamination identified from the previous land uses includes:

0 Heavy metal contamination.

0 Cyanides Organochlorine pesticides

Currently, the site is a vacant block of land. The proposed development subdivision is presented in Appendix H. The site is included in the State Register of Confirmed Contaminated Sites (Appendix I).

2.3 Regional Geology and Hydrogeology

The area of interest lies within the Melbourne Trough. Information obtained from the 1:63,360 geological survey map of Yan Yean indicates the site is underlain by Silurian aged siltstones and sandstones of the Anderson Creek Formation, which outcrop over most of the site. The map indicates the presence of quaternary alluvial sediments (sand, silt, gravel and clay) at the site boundaries.

Drillers log obtained for a groundwater bore located approximately 70 m to the north of the site indicates 50 m of yellow mudstone underlain by grey siltstone extending to at least 114 m depth (source: RWC, Bore ID 85890). Information regarding groundwater conditions in the Wattle Glen area was sourced from the RWC.

The information determined from RWC indicates that groundwater in the area occurs at significant depths (>20m) within fractured siltstones/mudstones of the Anderson Creek Formation. Boring records show that the fractured rock aquifer is characterised by low yields of saline water with high iron content.

RWC database search revealed 2 groundwater wells in 700 m radius from the site. In the radius between 1500 to 3000 m, 6 additional wells were found. All 8 registered bores are reported to have domestic usage, with 6 bores being also used for stock (see Appendix F).

A bore positioned west of the ridge, approximately 200 m north of the mine shaft, indicates presence of groundwater aquifer at a depth of 84 m below the ground surface. The well was reported to be unused. Data from a bore located in a valley approximately 700 m south west of the mine shaft, showed a groundwater aquifer at a depth of 24 m.

The downslope bore, located approximately 700 m south west of the mine shaft, was tested for the presence of any contaminants which could have been transferred from the shaft. No contaminants were detected (telephone conversation, C. Osmers, EPAV).

Page - 7 11 of 82 CONFIDENTIAL 2.4 Cyanide Waste - Background Data

2.4.1 Nature of Waste

It is reported that the cyanide contaminated waste originated in the heat treatment of metal components and at the time of disposal probably had a residual cyanide (NaCN) content of approximately 8% (as CN). -GMH indicated that only solid and relatively insoluble-- salts-_ were disposed of in the shaft. The exact composition --_4__y-.-_ ~ - - - .. -/ of the waste material is not known.

2.4.2 Method of Disposal

Most of the disposed waste is reported to have been stored in 44 gallon drums. Due to the lack of environmental regulations at the time, it is highly possible that some cyanide may not have been contained in drums.

The disposal conditions included the requirement that the shaft would only be filled to within approximately 4 m from the ground surface and that the shaft would then be filled with earth to the ground level. Very little information has been preserved regarding the depth of the shafts. No such records could be found at the Department of Energy & Minerals. It is known that at least one shaft where waste was buried, was 70 m deep. Shugg (1981) estimates that, given the volume of waste disposed and the cross sectional area of the shafts, approximately 250 m of shaft would be required to dispose the total of 300 tons of the waste, giving an average shaft depth in the order of 30 m. The depth of the disposal of the waste is not known.

2.4.3 Chemical Properties of Cyanide

Studies on the behaviour of cyanide in landfills indicate rapid reduction of cyanide in place achieved by valatilisation and the hydrolatis of cyanide to ammonium format. The cyanide is also known to readily form complexes with certain cations (eg Cu, Fe, Hart 1974). These properties of cyanide indicate that large scale distribution of cyanide is unlikely and that any effect can be expected to be local in nature (Shugg, A. 1981).

As stated by Shugg (1 981), the effective biodegradation of cyanide can occur unless:

0 The ground temperature was below 10°C. pH range outside 6-9.5 in the absence of Zn, Cd, Cu and Ni or 6-7.5 in the presence of any of these metals.

0 The solution became anaerobic.

0 Ferro or ferri cyanide were formed.

0 The organisms which can ultilise cyanide were absent.

The waste disposed in the mine shaft in the vadose zone above the groundwater level is likely to have experienced favourable conditions for biodegradation for 30 years or more.

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PRQIECl No,. MlAWlNG Ha: V91-1-IE 1 @ yLz 13 of 82 - CONFIDENTIAL 3.0 SUMMARY OF SITE INVESTIGATION ACTlVlTl

3.1 Introduction

The strategy for the site assessment was outlined by the Environmental Auditor in his letter to Geo & Hydro of 5 September 1994.

Following completion of the desk study and site inspection, the scope of the site investigation was finalised at a meeting with the Environmental Auditor on 3 February 1995.

The sampling plan was developed based upon all available information including results of the desk study and the site inspection.

3.2 Site Inspection

Geo & Hydro undertook a preliminary site inspection on 25 January 1995. The objective of the inspection was to identify the presence of potentially contaminated areas within the studied site. Discussions were held with Mr Stan Damley of I.J. Rickards Damley & Co pty Ltd wnceming the site history.

The results of site visit and discussion concerning potentially contaminated areas are presented in section 4.1.

3.3 Soil Sampling

Soil sampling was camed out on 7 and 19 February 1995. Drilling was performed using hand augers. Soil samples were collected from 40 boreholes at 0-0.2 m and 0.2 to approximately 0.5 m depth. Only the upper samples were sent for laboratory analysis.

The soil sampling was undertaken within each lot as recommended by the Environmental Auditor. The highest number of boreholes were placed in the immediate vicinity of the mine shaft.

Sample locations are given in map 1 opposite.

Page - 9 14 of 82 CONFIDENTIAL 3.4 Groundwater Well Installation

The drilling and installation of the groundwater monitoring well (W1) occurred on 7 February 1995 by North West Drilling using an air hammer drilling rig.

The rationale for the location of the monitoring well was based upon optimum location in respect to the mine shaft. The bore was to be positioned downgradient of the shaft, in the direction of the likely discharge point and as close as possible to the shaft, where the highest contaminant concentrations were expected. The bore was therefore installed 8 m east of the concrete slab covering the mine shaft entrance (see map 1).

Following installation of the well, the well was developed using an air lift method. The details of well construction are given in Appendix C.

Water samples were collected on 3 occasions. Before each sampling episode, the well was purged (see table below).

7 February 1995 Air lift North Wesmlw 19 February 1995 Two pipe air lift Ebaz Geophysical Drilling 8 March 1995 Air lift North West Drilling

The second groundwater sample (19/2/95) was collected 12 days after well installation as part of the quality controVquality assurance (QA/QC) program. Due to the unsatisfactory quality of the adopted sampling procedure and differences in sampling methods, the results of the groundwater analysis were discarded. This warranted further groundwater sampling which was carried out on 8 March 1995.

3.5 Laboratory Analysis

Sample borehole locations are given in map 1. Details of sample depth, soil type, sample numbering and sample duplicates are given in table Al, Appendix A. Samples were subject to some or all of the following ana lyses:

0 Heavy metals (Pb, As, Cd, Hg).

0 Total cyanide.

0 Organochlorine pesticides (OC)

0 pH.

Laboratory analyses were carried out by National Analytical Laboratories pty Ltd (NAL), a NATA approved laboratory.

Page - 10 15 of 82 CONFIDENTIAL 3.5.1 Soil Samples

Soil samples from each borehole were sent for laboratory analysis. Only the upper 0-0.2 m samples were analysed, as recommended by the Environmental Auditor.

Six composite soil samples and 14 individual samples, including 3 field duplicates, were analysed for the 4 heavy metals (Pb, As, Cd, Hg), total cyanide and pH. In addition, two composite samples and 3 individual samples were analysed for organochlorine pesticides (OC).

3.5.2 Groundwater Samples

Three groundwater samples were analysed for the 4 heavy metals (Pb, As, Cd, Hg), total cyanide and pH.

3.6 Quality Procedures

The aim of the quality assurance/quality control (QNQC) procedures implemented in this project were to ensure the quality of the data used in the site assessment, including sampling and analytical procedures. QNQC has been achieved by implementing the following procedures and controls:

0 Field sampling in accordance with documented procedures (Geo & Hydro Environmental Site Assessment Protocols, refer Appendix J).

0 Laboratory analysis by a NATA accredited laboratory.

0 Duplication of sample analyses.

0 Using qualified personnel to carry out the work in accordance with the procedures.

Page - 11 16 of 82 CONFIDENTIAL 4.0 R F INVEST1

4.1 Site Inspection and Field Observations

The site has been inspected for the presence of any potential areas of contamination. The site was found to be overgrown by grass with no visible signs of contamination (refer photo 1, Appendix 0).

The presence of disturbed soil surrounding the mine shaft was noted on-site. Discussion with Mr Stan Damley of I.J. RickardsDamley & Co Pty Ltd indicated that the soil derived from the immediate vicinity of the shaft was excavated during the installation of the concrete slab placed over the entrance (photo 2).

Man-made dams overgrown and filled with scrap metal were found within Lots 70-73 (photos 3 and 4). The dams could have been constructed at the time when gold mining activities were carried out on the site.

No natural groundwater discharge sites were noted near the mine shaft. Topography of the area and its geological profile suggested low rates of groundwater recharge. Inspection of the area surrounding the site indicated presence of a small creek in a gully located east of Reynolds Road. A larger surface water body, Watery Gully Creek, is located 500 m north east from the mine shaft.

4.2 Local Geology and Hydrogeology

4.2.1 Geological Profile

Borelogs produced during soil sampling and installation of groundwater well indicated a general geological profile to comprise of a white/light brown to green brown silt layer with orange fragments of weathered siltstone/sandstone extending to a depth of approximately 0.7 m (refer Appendix C). The soil is underlain by approximately 40 m of light brown siltstone overlying grey siltstone extending to at least 103 m depth.

A description of the typical soil profile encountered at the site is shown in table below.

organic matter in the upper 0.2 m. 0.5 - 0.7 Silt Greedbrown silt with fragments of siltstone/sandstone, very dry, dense.

Page - 12

17 of 82 TABLE 1: SOIL SAMPLES

*Dutch B level.

18 of 82

TABLE1.DOC CONFIDENTIAL 4.2.2 Hydrogeology

Information obtained during well installation indicates the depth to groundwater in the shaft area to be approximately 98-100 m. Standing water level in the well was recorded at approximately 60 m below ground surface.

The two closest surface bodies are a small creek 200 m east of the mine shaft and Watery Gully Creek, approximately 500 m north east, appearing to be at elevations (minimum 63 m AHD) greater than the measured aquifer elevation (1 7 m AHD).

Although there is a possibility that the aquifer elevation vanes across the area, it is considered unlikely that groundwater is discharging to these surface waters.

4.3 Laboratory Analysis Results

4.3.1 Acceptance Criteria

The criteria listed in the "Australian and New Zealand guidelines for the Assessment and Management of Contaminated Sites" (ANZECWNHMRC, January 1992) have been adopted in the assessment of the laboratory analysis results. For the compounds not listed in the ANZECC guidelines, the Dutch B level guideline has been used as an investigation threshold.

4.3.2 Soil Samples

The complete analytical reports, including chain of custody (COC) forms and QNQC reports, are presented in Appendix B. A summary of laboratory analyses is presented in table 1.

Heaw Metals

Twenty soil samples were analysed for lead (Pb), arsenic (As), cadmium (Cd) and mercury (Hg). Four of 20 samples analysed showed above B level arsenic concentrations, with the average arsenic concentration in the soil being in the order of 10 ppm below the guideline.

Concentrations of all other metals tested were well below B level.

Page - 13 19 of 82 CONFIDENTIAL Total Cyanide

No above Dutch B level cyanide concentrations were recorded.

Oraanochlorine Pesticides

No above B level organochlorine pesticides (OC) were recorded.

Aciditv - DH

Laboratory analysis showed acidity (pH) levels in the range between 4.1 and 6.3 across the study area.

4.3.3 Groundwater

The complete analytical reports, including COC forms and QA/QC reports, are presented in Appendix B. A summary of laboratory analyses is presented in table 2 below.

Due to the unsatisfactory quality of the adopted sampling procedure and differences in sampling methods, the results of laboratory analysis of the groundwater sample collected on 19 February 1995 were discarded (sample V91/1Nv1/2). Laboratory analysis results of groundwater samples collected on 7 February and 8 March 1995 are presented below.

TABLE 2: GROUNDWATER SAMPLES

'Australian Water Quality Guidelines for fresh and marine waters, Australian and New Zealand Environment and Conservation Council. November 1992.

Heavy Metals

No heavy metals were detected in the groundwater sample collected on 7 February 1995 (sample V9l/l/Wl/l). Detectable arsenic was recorded in the groundwater sample taken on 8 March 1995 (sample V9l/lnlvl/3). The arsenic concentration marginally exceeded threshold value for raw drinking water, however was below the guideline level for imgation and livestock water quality.

Page - 14

20 of 82 CONFIDENTIAL Total Cvanide

No cyanide was recorded in the 2 samples analysed.

Laboratory analysis showed groundwater pH of 8.6.

4.3.4 Quality Control Samples

Field DuDlicates

Three duplicate sets of blind samples were laboratory analysed (refer table 2 below). The duplicates formed 15% of a total number of samples analysed.

TABLE 2: FIELD DUPLICATE SAMPLES

2 v91/1/20/0.1 V91/1/28/0.1 3 V91/1/COMP3 V91/1lCOMP4

The samples were analysed for total cyanide, pH, mercury, cadmium, arsenic and lead. The laboratory analysis results are presented in table 3 below.

TABLE 3: RELATIVE PERCENTAGE DIFFERENCE (RPD) FOR FIELD DUPLICATES

Duplicate sets 1 and 2 showed some discrepancies (75% relative percentage difference) in the measured concentrations of lead and mercury respectively. The observed variation is believed to be due to sample non-homogeneity and uneven distribution of metals in the soil.

Page - 15 21 of 82 CONFIDENTIAL Duplicate set 3 indicated a relatively good precision of results with the maximum relative percentage difference of 20%.

Analvtical Laboratorv Internal QC

Six duplicate and six spiked samples were analysed as part of analytical laboratory internal QC. The results are reported in the certified analytical results included in Appendix B.

The quality control checks show an acceptable level of accuracy (in the range 100 to 137%) and precision (RPD in the range 0 to 25%).

Page - 16 22 of 82 CONFIDENTIAL

Soil sampling was carried out according to the recommendations given by the Environmental Auditor. The samples were analysed for heavy metals, total cyanide, organochlorine pesticides (soil samples only) and pH. The laboratory analysis results show: Below B level lead, cadmium and mercury concentrations in all soil samples analysed. Above B level arsenic in 4 of 20 soil samples tested, with the average arsenic concentration of 10 ppm, and below the guideline.

0 No detectable heavy metal and cyanide concentrations in the groundwater sample collected on 7 February 1995. Detectable arsenic in the groundwater sample collected on 19 February 1995. No detectable concentrations of all other compounds and elements tested.

In summary, the results of the site investigation indicate the following: The hydrological setting of the site is characterised by a deep water table, low recharge potential and a fractured rack system with relatively low hydraulic conductivity; Surface water infiltration into the shaft is considered unlikely as the shaft was filled with earth (clay?) following the disposal and has recently been capped by concrete slab. The contaminated waste is reported to have contained solid, relatively insoluble cyanide salts; The cyanide is known to biodegrade in favourable conditions and readily form complexes with certain cations (when favourable conditions exist).

Given the above, it is considered that there is a low potential for groundwater contamination originating from the wastes disposed into the shaft. Groundwater laboratory analysis results confirm that the underlying groundwater is free of cyanide contamination. The detectable arsenic concentration recorded in one of the groundwater samples is within quality limits for irrigation and livestock water use. The concentration marginally exceeds the raw water quality guideline, however it is considered unlikely that the water is or will be used for human consumption due to its high salinity and high iron content.

Page - 17 23 of 82 CONFIDENTIAL 6.0

This report describes the on-site activities and laboratory analysis results of the site assessment program carried out on Kamarooka Drive Estate, Wattle Glen, Victoria by Geo & Hydro Pty Ltd. The report has been compiled for Rojim Lands Pty Ltd c/- I.J. Rickards Darnley & Co Pty Ltd and for review by the Environmental Auditor, with the aim of obtaining a Certificate of Environmental Audit for the site. The report is valid only in its original form and for the purpose for which it was requested. Geo & Hydro Pty Ltd, its employees and its subcontractors undertake no responsibility in any way whatsoever other than to the client in respect of this report including any error or omissions however caused.

Under the terms of our engagement, Geo & Hydro Pty Ltd, its employees and its subcontractors have relied on representations and data made available by your organisation and third parties and accordingly no responsibility or liability is accepted by Geo & Hydro Pty Ltd, its employees and its subcontractors as a consequence of any errors or omissions in those representations or data.

Page - 18 24 of 82 25 of 82 TABLE Al: SAMPLE DETAILS

'Field composites

TABLEA1 .DOC26 of 82 27 of 82 - NRTIONRL RNRLYTICRL lRBORRTORI€S PTY 1TD

ACN 006 716 963 ::-- 585 Blackburn Road Notting Hill Victoria Australia 3168 Tel 03 562 5899 Fax 03 562 0336 U

CERTTFICATE OF ANALYSIS

National Association of Testing DATE 17 February 1995 Authorities, Australia NATA ENDORSED DOCUMENT LABORATORY NUMBER FEBA6407 This document may not be reproduced in full CLIENT Geo and Hydro Pty Ltd, Melbourne except SAMPLE Samples received 9/2/95 - Job Ref: V91/1/IF Wattle Glen METHODS Metals NAL E102.C3, NAL E102.34 -. . Organochlorine Pesticides NAL El 10.51 PH APHA, NAL E100.04 Cyanide. 1.303

These were analysed by PWT AsialPncific, Scoresby and resul~sreported on document 95.0109 RESULTS

Please refer to attached page/s for results

Approved By < /J& Authorised By E D Jones BSc M R A VI Dr G J BaxterPh6a RACI CHIEF CHEMIST MANAGING DIRECTOR FEBA6407... 1 OF 6 Environmental Testing Food h Feed Analyses Pharmaceutical Analyses Microanalytical Service Workplace Drug Screening Air Monitoring

TCA LicenseNumber 37334

Approved by Dept. Primary Industry(D.P.1.) for PesticldeTesting

Approved by Dept. of Labour for AsbestosTesting Approved Analyst (Victorian Health Act)

Approved Research Organisation (Commonwealth I.R. b D. Grants Act) Approved Quaran t i ne Premises

28 of 82 1 Y

Psge : 2 of.. .6 FINALREFORT.

DATE :17/02/95 Client : CEO & HYDRO PTY LTD : MELBOURNE Job Reference : V91/1/IF WATI'LE GLEN Results expressed in mglkg dry weight. I LABID Received Moist Sample Pb As Cd Hg PH TOTAL CYANIDE

FEBA6417 9/02/95 9.1 V91/1/13/0.1 10 21 1 0.02 5.6 <0.1

FEBA6418 9/02/95 7.7 V9 1/1/14/0.1 18 15 1 0.05 5.2 <0.1

FEBA6419 9/02/95 6.1 V91/1/15/0.1 7 15 1 0.01 5.3 <0.1

FEBA6420 9/02/95 6.0 V91/1/16/0.1 7 6 <1 0.02 5.2 0.2

FEBA6421 9/02/95 8.3 V91/1/17/0.1 11 4

FEBA6422 9/02/95 8.0 V91/1/18/0.1 34 3 <1 0.04 4.9 0.6

FEBA6423 9/02/95 19.3 V9 11111 910.1 40 4

FEBA6424 9/02/95 15 .o v9111 nolo. 1 26 20 1 0.08 4.1 1.3

FEBA6425 9/02/95 5.6 V9111t2110.1 21 42 2 0.05 4.8 0.2

FEBA6426 9/02/95 10.9 v91/1/22/0.1 20 4

FEBA6427 9/02/95 4.1 V91/1123/0.1 17 3 <1 0.05 4.6 0.6

FEBA6428 9/02/95 5.1 V91/1M4/0.1 21 3 <1 0.04 4.4 1.o

FEBA6429 9/02/95 10.2 v91/1/25/0.1 17 5 <1 0.04 4.7 1.o

FEBA6430 9/02/95 8.4 V91/lt26/0.1 11 4

FEBA6431 9/02/95 6.3 V9111/27/0.1 9 4

FEBA6432 9/02/95 17.4 v9iiinaio.i 19 12 1 0.02 4.6 0.7

FEBA6439 9/02/95 10.1 V91111COMP 1 16 3 <1 0.04 5.5 0.3

FEBA6440 9/02/95 9.0 V9I/I/COMP 3 12 16 1 0.03 6.2 0.6

FEBA6441 9/02/95 9.4 V91/1/COMP 4 11 20 1 0.03 6.3 0.5

29 of 82 Page : 3 of.. .6 FINALREPORT.

DATE :17/02/95 Client : GEO & HYDRO FTY LTD : MELBOURNE Job Reference : V91/1/IF WATTLE GLEN Results expressed in mglL. LABID Received Sample Pb As Cd Hi3 PH TOTAL. , CYANIDE

FEBA6407 9/02/95 V91IlMrlll

30 of 82 Page : 4 of ...6 FINALREPORT.

DATE :17/02/9S Client : GEO & HYDRO Pn LTD : MELBOURNE Job Reference : V9llllIF WA’ITLE GLEN Resulta expressed in mglkg dry weight. LABD Received Sample HCB aBHC LIND HEPT ALDR bBHC OXCH HEPEP ‘DDE DIEL DDD DDT MlTHOX ENDR

31 of 82 0 QUALITY ASSURANCE REPORT Psge : 5 of ...6 FINALREPORT.

DATE :17/02/95 Client : GEO &HYDRO FTY LTD : MELBOURNE Job Reference : V91/1/IF WATTLE GLEN Results expressed in mglkg dry weight. 3 LABID Received Moist Sample Pb As Cd Hg PH TOTAL. CYANIDE

FEBA6642 9/02/95 9.1 v9111/13/0.1 13 24 1 dupltlFEBA6417 FEBA6417 9/02/95 9.1 v91/1/13/0.1 10 21 1 0.02 5.6 <0.1

FEBA6643 9/02/95 9.1 v9111/13/0.1 100 110 98 spikelFEBA6417 Expected Result 110 120 100 FEBA64 17 9/02/95 9.1 v91/1113/0.1 10 21 1 0.02 5.6 < 0.1

FEBA6644 9/02/95 9.1 v91/1/13/0.1 110 120 100 spikeIFEBA64 17 Expected Result 120 130 110 FEBA6417 9/02/95 9.1 v91/1/13/0.1 10 21 1 0.02 5.6 < 0.1

FEBA6645 9/02/95 0.0 BLANK <2 <2

FEBA6995 9/02/95 9.4 V9llllCOMP 4 0.04 duplllFEBA6441 FEBA6441 9/02/95 9.4 V91/1/COMP 4 20 1 0.03 6.3 0.5

FEBA6996 9/02/95 9.4 V91/1/COMP 4 0.21 spikelFEBA6441 Expected Result 0.21 FEBA6441 9/02/95 9.4 V91/1/COMP 4 20 1 0.03 6.3 0.5

FEBA6997 9/02/95 9.4 V91111COMP 4 0.23 spikeIFEBA6441 Expected Result 0.25 FEBA6441 9/02/95 9.4 V91I11COMP 4 20 1 0.03 6.3 0.5

32 of 82 QUALITY ASSURANCE REPORT Rge : 6 of ...6 FINALREPORT.

DATE :17/02/95 Client : GEO & HYDRO PlY LTD : MELBOURNE Job Reference : V91/1/IF WATTLE GLEN Results expressed in mglkg dry weight. I LABID Received Somplc HCB aBHC LIND HEIT ALDR bBHC OXCH HEPEP DDE DIEL DDD DDT MEI'HOX ENDR

FEBA6594 9/02/95 V91/1114/0.1 <0.05 <0.05 <0.05 <0.05 <0.05 CO.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05

FEBA6595 9/02/95 V9 111 /14/0. 1 0.09 0.07 0.07 0.08 0.10 0.08 <0.05 0.07 0.08 0.08 0.08 0.32 0.16 0.08 apikelFEBA6418 Expected Result 0.09 0.09 0.09 0.09 0.12 0.11

33 of 82 __------TOTAL: I3 1 12 6662 I4

34 of 82 GEO & HYDRO 444 CHAIN OF CUSTODY RECORD (coc) Environmental Engineers (modified affer US €PA chain of custody form) 2L '4yurthu-) sampws AL 4 SHEEF-OF- PROJECT No: qqL/\ I IF signature: d-

TO (Labname)? MAL . RELINQUISHED BY: (sign)' RECEIVED BY: (sign) Date :id- Time: : am/pr RELINQUISHED BY: (sign) RECEIVED BY: (sign) Date: 2d- Time: . : amhi RELINQUISHED BY: (sign)

TO BE COMPLETED BY GEO & HYDRO b INSTRUCTIONS TO LAB Resub to be availablewithin: 024HRS 048HRS m72HRS OOTHER( Resub will be available within: Use only 50% of each jar to make composite sample. Ma content of jars thoroughfy before takhg 50% out. 024 HRS 048 HRS 072 HRS DOTHER( Resubto be faxedto Offi. Lab Supervisor Name: ANALYSES FOR: 1. TPH: If not speafred. anam TPH(GC) . 2HM:Ifmt~pecifiedanalyseforPb.~~k 1 Cd,Hy 3. T0t-L c3QGdc 4. pff - 5. 0. c. 14 Must bec0mplW by Gsoa Hydrc 35 of 82 :&G&NRTlONAL RNRLYTICRL LRBORRTORI€S PTY LTD

ACN 006 716 963 585 Blackburn Road Notting Hill Victoria Australia 3168 Tel 03 562 5899 Fax 03 562 0336 U

CERTIFICATE OF ANALYSIS

National Association of Testing DATE 28 February 1995 Authorities, Australia NATA ENDORSED DOCUMENT LABORATORY NUMBER FEBA7 166 This document may not be reproduced CLTENT Geo and Hydro Ry Ltd, Melbourne SAMPLE Samples received 21/2/95 -Job Ref: V91/1/IF Wattle Glen METHODS Metals NAL E102.21, NAL E102.C3, NAL E102.34 Organochlorine Pesticides NAL E110.51 PH APHA Cyanide 1.301/1.303 RESULTS

Please refer to attached page/s for results

.., .

Approved By

CHIEF CHEMIST W MANAGING DIRECTOR "Ihckarcrsp~p~by~~~cif~.~by~dDuIU1c~~~9~.0148 FEBA7166 ... 1 OF 6 Envi ronmental Testi ng Food &Feed Analyses Pharmaceutical Analyses Microanalytical Service Workplace Drug Screening Air Monitoring

TCALicense Number37334

Approved by Dept. Primary industry(D.P.1.) for PesticideTesting

Approved by Dept. of Labour for Asbestos Testing Approved Analyst (Victorian Health Act)

Approved Research Organlsation (Commonwealth I.R. & D. Grants Act) Approved Qua r a n tine Pr e m I ses 36 of 82 Page : 2 of ...6 FINALREPORT. -SOIL

DATE :28/02/95 Client : GEO & HYDRO PTY LTD : MELBOURNE Job Reference : V91/1/IF WATTLE GLEN Results expressed in mglkg dry weight. LABlD Received Sample HCB aBHC LIND HEFT ALDR bBHC OXCH HEPEP bDE DIEL DDD DDT METHOX ENDR

FEBA7169 21/02/95 V91111COMP 2 CO.05 CO.05 CO.05 <0.05 CO.05

37 of 82 Page : 3 of ...6 FINALREPORT.-SOIL

DATE :28/02/95 Client : GEO & HYDRO PTY LTD : MELBOURNE Job Reference : V91/11IF WA'ITLE GLEN Results expressed in rnglkg dry weight. , LABID Received Moist Sample PH Cd Pb As Hg Cyanide

FEBA7169 21/02/95 4.8 V91/1/COMP2 5.42 <1 15 6 0.27 0.4

38 of 82 Psge : 4 of ...6 FINALREPORT. -WATER

DATE :28/02/95 Client : & HYDRO FTY LTD : MELBOURNE Job Reference : V91/1/IF WAlTLE GLEN GEO I Results expressed in mglL . LABID Received Moist Sample PH Cd pb As Hg Cyanide

FEBA7170 21/02/95 10o.o V91/1lW1/2 8.13 0.14

39 of 82 U QUALITY ASSURANCE REPORT Page : 5 of.. .6 FINALREPORT.-SOIL

DATE :28/02/95 Client : GEO & HYDRO FTY LTD : MELBOURNE Job Reference : V91/1/IF WAlTLE GLEN Results expressed in rnglkg dry weight. LABID Received Sample HCB aBHC LIND HEFT ALDR bBHC OXCH HEPEP dDE DIEL DDD DDT MIXHOX ENDR

FEBA7530 21/02/95 BLANK <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05

40 of 82 0 QUALITY ASSURANCE REPORT Pnge : 6 of.. .6 FINAL REPORT. -SOIL

DATE :28/02/95 Client : & HYDRO PTY LTD : MELBOURNE Job Reference : V91/1/IF WAlTLE GLEN GEO I Results expressed in mglkg dry weight. LABID Received Moist Snmple PH Cd Pb As Hg Cyanide

FEBA7546 21/02/95 4.8 V91/1/COMP 2 c1 15 6 duplVFEBA7169 FEBA7169 21/02/95 4.8 V91l11COMP 2 5.42 c1 15 6 0.27 0.4

FEBA7547 21/02/95 4.8 V91I11COMP 2 92 100 91 spikelFEBA7169 Expected Result 97 110 100 FEBA7169 21/02/95 4.8 V91l11COMP 2 5.42 c1 15 6 0.27 0.4

FEBA7548 21/02/95 0.0 BLANK c1 c2 c2

41 of 82 CHAIN OF CUSTODY RECORD (COC) GEO & HYDRO 444 Environmental Engineers (modified after US EPA chain of custody form) 4A

'0 (Labname):' Ec/, A . L 3ELINQUISHED BY: (sign)' RECEIVED BY: (sign) Date: -2- M.h- Time: : adpm {ELINQUISHED BY: (sign) RECEIVED BY: (sign) Date:--- Time: : adpm

~ ?ELINQUISHED BY: (sign) TO BE COMPLETED BY LABORATORY +

~ ~~ ~~ ~ TO BE COMPLETED BY GEO & HYDRO b qSTRUCTIONS TO LAB esub to be available within: I24 HRS 048 HRS 72 HRS OOTHER( I d Resub wiIl be 58 onty 50% of each jar to make composite sample. available within: bc content of jars thoroughly before taldng 50% out 024HRS 048HRS 072HRS OOTHER( ] esub to be faxed to E;zPJ L Office. Lab Supervisor Name: NALYSES FOR: Sign:

42 of 82 NRTlONRl RNRlYTlCRl IRRORRTORIES PTY 1TE

Road Notting Hill Victoria Australia 3168 Tel 03 562 5899 Fax 03 562 033C U

CERTIFICATE OF ANALYSTS

National Association of Testing DATE 17 March 1995 Authorities, Australia NATA ENDORSED DOCUMENT LABORATORY NUMBER MARA8527 This document may not be reproduced exceut in full CLIENT Geo and Hydro Pty Ltd, Melbourne SAMPLE Samples received 10/3/95 -Job Ref: V91/1/IF Wattle Glen METHODS Metals NAL E102.3 1 PH APHA Cyanide 1.30U1.303

Please refer to attached page/s for results

ApprovedApprovedBy By Authorised By E D JonesBSc M R A Dr G J BaxterPhD M R A C I CHIEF CHEMIST MANAGING DIRECTOR

43 of 82 Page : 2 of.. .3 FINALREPORT.

DATE :17/03/95 Client : GEO & HYDRO FTY LTD : MELBOURNE Job Reference : V91/1/IFWATTLE GLEN Results expressed in mgL LABID Received Sample pH CYANIDE Pb Zn

MARA8527 10/03/95 V91IlNlM 8.6 <0.01

44 of 82 A 0 QUALITY ASSURANCE REPORT Page : 3 of.. .3 FINALREPORT.

DATE :17103/95 Client : CEO & HYDRO PTY LTD : MELBOURNE Job Reference : V91/11IF WATTLE GLEN Resulta expressed in mg/L LABID Received Sornplc pH CYANIDE Pb Zn

MARA8913 10103195 V91/1/W113 < 0.005 < 0.01 duplclMARA8527 MARA8527 10/03/95 V9111/W113 8.6 <0.01 <0.005 <0.01

45 of 82

I- Time: : amhn RELINQUISHED BY: (sign)

TO BE COMPLETED BY GEO & HYDRO 4 ~ INSTRUCTIONS TO LAB Resub to be available within: 024 HRS 048 HRS Qf2 HRS OOTHER( Results win be available within: Use onty 50% of each jar to make cornpsae sample. MK content of jars thoroughb before taking 50% out. 024 HRS 048 HRS 072 HRS OOTHER( Resub to be faxed to fl'&3. office. Lab Supervisor Name: ANALYSES FOR: Sign: 1. TPH: If not specified, anatyse TPH(GC)

- Must be fully completed by lab for payment 46 of 82 CER"ICATE OF ANALYSIS pg-National Association of Testini DATE 21 March 1995 Authorities, Australia NATA ENDORSED DOC- LABORATORY NUMBER MARA8527A This document may not bc reproduce CLIENT Geo and Hydro pty Ltd, Melbourne SAMPLE Sample as submitted - Job Ref: V91/lAF Wattle Glen METHOD NAL E102.03, NAL E102.04

Please refer to attached pagds for results

ApprovedECHIEF D JonesBSc CHEMIST By M R A Dr G J Baxter9hD M R A C I MANAGING DIRJXTOR :MARAS521A.. .1 OF 3

47 of 82 Wge : 2 of ...3 FINALREPORT.

DATE :21/03/95 Client : GEO &. HYDRO PTY LTD : MELBOURNE Job Reference : V91/1/IF WAITLE GLEN Results expressed in mg/L LABID Received Sample AS Cd Hg

MARASS27 10/03/9S V9 1 Il/W1/3 0.06 <0.001 <0.001

48 of 82 QUALITY ASSURANCE REPORT Rge : 3 of.. .3 FINALREPORT.

DATE :21/03195 Client : GEO & HYDRO Pm LTD : MELBOURNE lob Reference : V91111IF WA'lTLE GLEN Results expressed in mglL 1 LABID Received Sample pH CYANIDE Pb Zn As Cd Hg

MARA89 13 10103195 V9 llllWIl3

. 49 of 82 Tfmo: : am/pn RELINQUISHED BY: (sign) RECEIVED BY: (sign) Date:--- the: ; rm/prr RELINQUISHED BY: (sign) I TO BE COMPLETED BY LABORATORY TO BE COMPLETED BY GEO & HYDRO 4 Received by (NM): INSTRUCTIONS TO UB Slgn: to k rmlbmn:

50 of 82 51 of 82 GEO a HYDRO PTY LTD 4 4 Excellence In Envimnmentol Engineering :4 - DL Drilling Log 4 Well Number: W1 Project Number: V91-1-IE Client: I.J. Rickards, Darnley & Co. Pty Ltd Site MaD: Project: Site Assessment Location: Wattle Glen N I Date Drilled: 7.2.1995 Total Depth of Hole:103m Diameter: - Surface Elevation: - Water Level: Initial 60m 24hrs - hc# Screen: Dia. lOOmm Length: 40m Slot Size: 0.4mm 67 68 69 Casing: Dia. 100mm Length: 63m Type: Class 9 PVC

Drilling Company: North West Drilling Method: Air Hammer Driller: - Log by: A.C. WELL LOCATIONY??Y?

00 ai5n Material Description Additional ;$ Observations

Silt; white/ lighf bnnvn, containing fmgments of siltstone/mudstone Silt; gmen/bmwn, containing jmgment s of siltstone/mudsione Siltstone; light brow

------Siltstone; g7ey

52 of 82 53 of 82 1. View of site looking north along Reynolds Road.

54 of 82 3. Man-made dams in northern section of site.

2. Mine shaft location - note position of survey pegs. Well drilling in progress.

55 of 82 56 of 82 0 Q 00 u)

I a

GEO & HYDRO PTY bTD44,44 Excellence In Environmental Engineering 44 FEEPAAU) FOR ROJIM LANDS PTY LTD

SCALE: PROJECT No: DRAWING No.: N.T.S. V91-1-IE E-1 57 of 82 ......

58 of 82

! 59 of 82 t 'd L' _, RURAL WATER"CXM?ORATION BORE COMPOSITE REPORT I 12/12/1994 00:05:03 Page 1 BORt DITR Date Aquif Aquif Lith SWL Pump Time Draw- Latest Chemical Analysis Id No Completed From To (m) Rate (h:m) down Date MTH TSS CL FE PH EC Hard (m) (m) (1 /sec) (m) Sampled Total

1 --Parish: 2724 - GREENSBOROUGH 66390 10001 13/04/1971 7.9 19.8 SAND 4.9 1.3 13.7 26/05/1971 FLO 1410 7.7 5167 66394 10005 20/03/1973 35.0 42.7 SAND 30.5 0.4 6.1 66395 10006 20/01/1983 36.0 119.0 MUST 30.0 0.6 70.0 --Parish: 3310 - NILLUMBIK 85884 10004 21/08/1979 63.0 77.0 SAND 55.0 0.4 13/09/1979 BAL 1236 4.00 8.6 4570 85886 10006 30/09/1982 24.0 60.0 MUST 21.0 0.5 33.0 06/12/1982 AIR 7000 85888 10008 31/01/1984 90.0 107.5 BASA 26.8 1.5 85889 10009 17/10/1986 38.0 90.0 MUST 36.0 0.5 85890 10010 11/04/1988 84.0 114.3 SIST 50.0 1.8 11/04/ 1988 NKN 2647 1000 6.80 8.6 4400 463

***** END OF REPORT *****

60 of 82 ww b RURAL WATER'&d?ORATION \4 BORE OWNER REPORT 12/12/1994 00 :05 :28 Page: 1 BORt BCL DIlR 0wners Dri11 ers Cadastral GW Licence OTH Bore Bore Date Id No Bore Name Name Desc or Licence Volume Bor Usage Depth Drilled No Sect ion, A1 1otment No (ML/Yr) Ljc (m)

1 --Parish: 2724 - GREENSBOROUGH

66390 439 10001 ROGONA G SAMMASSIMO F 9 12 DM,ST, 21.9 13/04/1971 66394 3662 10005 CORNER F & D SAMMASSIMO F , 39 DM,ST, 42.7 20/03/1973 66395 19534 10006 SEARLE L G SAMMASSIMO F * 93 DM 119.0 20/01/1983 --Parish: 3310 - NILLUMBIK 85884 11988 10004 M L . STEVENSON GRANDE A , 14 DM.ST, 80.0 21/08/1979 85886 17392 10006 A L . WILLIAMS SAMMASSIMO F DM, ST, 60.0 30/09/1982 85888 24075 10008 M A . PHILLIPS D'ALOISIO P 4, ,3 DM,ST, 108.0 31/01/1984 85889 28927 10009 METCALF D & J PIANA J DM,ST, 91.0 17/10/1986 85890 32355 10010 BRENNAN G BRENNAN G DM . 114.3 11/04/1988

***** END OF REPORT *****

61 of 82 L LJ ’-# RURAL WATER CORPORATION BORE CHEMISTRY REPORT 12/12/94 00:05:58 Page 1

BORE OLD SAMPLE SAMPLE METH SAMPLE SAMPLE TSS CL C03 HC03 TOT SO4 N CA MG NA K FE HARD pH EC ORG PES HM MIN BAC IS0 NUT OTH ID BORE NO DATE FROM TO ALK 1 (m) (m)

--PARISH 2724 - GREENSBOROUGH

66390 10001 7467 07/05/71 FLO 7.9 19.8 7897 4700 12 183 282 85 720 1844 54 2.5 3177 8.13 14432 7468 07/05/71 FLO 19.8 21.9 6967 3620 644 331 195 501 1627 32 2.2 2550 7.79 13776 7469 26/05/71 FLO 7.9 19.8 3084 1410 543 86 90 237 656 2 1199 7.72 5167

--PARISH 3310 - NILLUMBIK

85884 10004 14753 21/08/79 AIR 63.0 77.0 2876 1214 558 152 58 151 706 17 1.0 766 7.05 4650 yes 14754 13/09/79 BAL 63.0 77.0 2712 1236 51 378 112 0.5 29 136 712 50 4.0 636 8.55 4570 yes yes 85886 10006 52172 14/10/82 FLO 24.0 60.0 4266 2276 26 401 92 0.2 54 252 1110 44 1172 8.20 7000 yes yes 52173 06/12/82 AIR 24.0 60.0 4200 7000 Yes 85890 10010 40332 11/04/88 NKN 108.0 114.0 2647 1000 40 744 610 190 0.2 19 100 770 13 6.8 463 8.60 4400 yes yes

***** END OF REPORT *e***

62 of 82 bd L.. i/ RURAL WATER,eOAORATION .d’ AQUIFER REPORT 12/12/94 00 :06 :25 Page 1

BORE OLD WATER FROM TO LITHO CASING DIA TYP APER SWL PUMP PUMP PUMP DRAW REC EC TEST TEST ID BORE SCREEN (m) (m) LOGY DEPTH (mm) (mm) (m) DEPTH RATE TIME DOWN TIME TYPE DATE NO. (m) (m) (l/sec)(H:M) (m) (H:M) I I

--PARISH 2724 - GREENSBOROUGH 66390 10001 SCREEN 7.9 19.8 NOT NKN 4.9 1 13.71 13/04/1971 WATER 7.9 19.8 SAND NKN 4.9 1 13.71 13/04/1971 66394 10005 SCREEN 35.0 42.7 NOT NKN 30.5 6.09 20/03/1973 WATER 35.0 42.7 SAND NKN 30.5 6.09 20/03/1973 66395 10006 WATER 36.0 119.0 MUST 107.0 100 PVC 30.0 119.0 1 70.00 AIR 20/01/1983 SCREEN 107.0 119.0 MUST PSL 4 30.0 1 70.00 AIR 20/01/1983

--PARISH 3310 - NILLUMBIK 85884 10004 SCREEN 63.0 77.0 NOT NKN 55.0 AIR 21/08/ 1979 WATER 63.0 77.0 SAND 4.5 152 PVC 55.0 AIR 21/08/1979 85886 10006 WATER 24.0 60.0 MUST 54.0 125 PVC 21.0 60.0 1 33.00 AIR 30/09/1982 SCREEN 54.0 60.0 MUST PSL 4 21.0 1 33.00 AIR 30/09/1982 85888 10008 SCREEN 90.0 107.5 NOT NKN 26.8 1 AIR 31/ 01/ 1984 WATER 90.0 107.5 BASA 107.0 127 MST 26.8 107.5 1 AIR 31/ 0 1/ 1984 85889 10009 SCREEN 38.0 90.0 NOT NKN 36.0 1 AIR 17/10/1986 WATER 38.0 90.0 MUST 26.5 152 MST 36.0 91.0 1 AIR 17/ 10/ 1986 85890 10010 WATER 84.0 114.3 SIST 108.0 100 PVC 50.0 114.3 2 AIR 11/04/ 1988 SCREEN 108.0 114.3 SIST PSL 50.0 2 AIR 11/04/1988

***** END OF REPORT *****

63 of 82 - Y -w nunAL wn.ims cvia-u~~~iiui~ BORE LOCATION REPORT 12/12/94 00:06:49 Page 1

BORE OLD RIG NO./ BORE AMG AMG EAST NORTH DATE TOTAL RLNS BORE USES DRILL LOGS AQUIF AQUIF TSS ID BORE LIC NO. AUTH SHEET ZONE COMPLETED DEPTH TYPE METHOD G D FROM TO mg/L NO. (m) (rn) (m)

--PARISH 2724 - GREENSBOROUGH 66390 10001 439 LAND 792242 55 337960 5830900 13/04/1971 21.94 GW DM ST NKN N N 7.9 19.8 3084.0 66394 10005 3662 LAND 792242 55 338440 5831500 20/03/1973 42.67 GW DM ST NKN N N 66395 10006 19534 LAND 792242 55 340540 5831950 20/01/1983 119.00 GW DM DHH N N --PARISH 3310 - NILLUMBIK 85884 10004 11988 LAND 792242 55 340758 5827951 21/08/1979 80.00 GW DM ST DHH N N 63.0 77.0 2712.0 85886 10006 17392 LAND 792242 55 338961 5828498 30/09/1982 60.00 GW DM ST DHH N N 24.0 60.0 4200.0 85888 10008 24075 LAND 792242 55 338060 5826380 31/01/1984 108.00 GW DM ST DHH N N 85889 10009 28927 LAND 792242 55 341250 5826660 17/10/1986 91.00 GW DM ST DHH N N 85890 10010 32355 LAND 792242 55 339500 5829060 11/04/1988 114.30 GW DM DHH N Y 108.0 114.0 2646.9 ***** END OF REPORT *****

64 of 82 ~~

BORE ID LITHOLOGY FROM LITHOLOGY TO LITHOLOGY DESC .-__------,______-_------__-__-_-_------___------______------_--_---__------______-_-__-__------66399 0.000 0.500 CLAY 66399 0.500 30.000 YELLOW SANDSTONE & GREY SANDSTONE 66399 30.000 77.000 SILTSTONE 66400 0.000 0.400 TOPSOIL GREY ..I 66400 0.400 4.800 STIFF BROWN CLAY 66400 4.800 5.600 FIRM MOIST BROWN SANDY CLAY 66400 5.600 71.000 SILTSTONE BLUE/GREY QUARTZ LENSES 85890 0.000 50.000 YELLOW MUDSTONE 85890 50.000 ’ 114.300 GREY SILTSTONE

65 of 82 66 of 82 - Delivered by . ., . . :: . .I ‘.

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NOTATIONS SEE SHEET 5 .AN0 SUBJECT TO EASEMENT .-I AND E-6 -GE AN0 SZWERPCE *a eASlSWleNT VIOIZ I-3. 2t433s. ... TWO P a 0 AN0 APPROPRIATED OR SET APART fx .-2, e- -t AIJO E- I+ DRAINAGE AND S=W-RAGE

OAOQ Wl7HlN THE CONTINUOC]S 7UCX LNES DR WAY, D4AVI(LCe, SEWeRACjE AND SUPPLY )F WATeR,EECmCrl,TELEPnOhlE ArJO -.

!-5 EE-6 V5E OF THE STATE ELECTRKLTY N COMMISSION OF VICTORIA D LINE 3u;2pc5ES FURSUPNT 70 S2CTlON b336 OF THE S.E.C.BCT e-*. 2.335 ha c ITHER NOTATIONS 07s I - 41 (WTH RJCUSlvC,) AND 62 TO 83 BOTH WUVSNE) LOTS 'A. B AND c' HAVE BEEN b IHITTEO FROH THIS PLAN. 3 v) 2c, L3 0 z

a -4 r ? ~~ .! TO BE ~ffEDWfRELPCLICABLE - r THIS SURVEY n(As BEEN CONNECTED TO PERMANENT HARKS i' NOS: IN PROCUIUED SURVEY AREA NO. 1 PERVERSI AVENUE TWE LANO TO BE SUBDIVIDED IS ENCLOSED ~~EREF:BY THICK LINESVOL 90111 Po~fbB , LASTPUNREF: LOT C ON LPZ14339G puv\I OF SUBDIVISION CERTIFICATE A COUNTY EVELYN THIS PWd ACCORDS WITH A PLAN SEALED BY THE COUNCIL UNDER SECTION 5638 OF THE LOCAL GOVERNMENT ACT 1958 ON PARISH NILLUMBIK WAELT ?+ CONFIRMED ay THE PLANNING APPEALS BOARD ON AND A REOUIREMENTINO REQUIREMENT PURSUANT TO SECilON 569E OF THE LOCAL GOVERNMENT CROWN PORTION 4 (PART) ACT 1958 HAS BEEN MADE

DAn MUNICIPAL CLERK AMENDMENn CERTIFICATE a THIS PLAN ACCORDS WITH A PlAN EXEMPTED FROM SUBDIVISION (3) OF DIVISION (9) OF PART XIX Of THE LOCAL GOVERNMENT ACT 1958 BY THE COUNCIL ON F THE P'LANNINC APPEALS BOARD ON LAWLOR AND LOY PTY. LTD. UIIYLYm'atC- LAND SURVEYORS AND TOWN PLANNERS 3885- 4- 172 PARA ROAD HONTHORENCY 309b MUNICIPAL CLERK Q.& VrmRU TELEPHONE . L35 7b77 QRhVN: Ma DAn WSI RECImOF TITLES LP214340 X I I A I . I %$- 1 I E 68 of 82 69 of 82 10-00 P CONCRETE (rc4PPn.JC SLAB 43-61 SELECTED CONSOLIDATED BerUFlLL 1 I FINISHED SURFACE TO MATCH WITH AOJACENT EXISTING SURFACE ? 73

43.67

0 0 72 4 71

EXISTI- FILLING IN SHAFT QUALITY UNKNOWN. COMPACTld) MKNOWN. DEPTH UNKNOWN. 43-79 APPEARS STABLE SOLID.

SECTlOiJ AA

, 1-00 NOM 1.60 1.00 -1 1 - L _t KAMAROOKA DRIVE L A LOCALITY PLAN SCALE - I : 500

3OOrm-r THICK R CONCRETE CAPPINC; SLAB

CAPPING PROCEOURE NOTES: GENERAL NOTES:

ALL DIMENSIONS ARE IN METRES UNLESS OTHERWISE SH.l*lN. EXCAVATE ALL AROUND SHAFT A BEWCH. NOT LESS THAN ONE (1) METRE WIDE TO FORM A SOUND BASE FOR THE CAPPING SLAB. ALL WORKS ARE TO BE CONSTRUCTED TO THE SATISFACTI~INOF THE SHIRE ENGINEER. SHIRE OF DIAMOND VALLEY. CAST REINFORCE0 CONCRETE SLAB AS DETAILED. THE CONTRA€TOR TO MAKE PROVISION FOR THE SAFEI'I OF THE NOT LESS THAN 14 DAYS AFTER THE SLAB IS POURED BACKFILL IS PUBLIC. PLANT 6 WORKERS DURING THE CURRENCY OF T:lli bORKS. -PLAN VITH SELECTED CONSOLIOATEO NATERIAL FROM THE SITE TO A MINIMUM DEPTH OF >OO=m. ALL SUCH ARRANGEMENTS ARE TO BE TO THE SATISFACTIllN OF THE SHIRE ENGINEER OR APPOINTED REPRESENTATIVE. CAPPING DETAIL TRIM REFILLED AREA TO FIT -NEATLY WITH ADJACENT EXISTING HIS -- S.IALE- I . SURFACES. '20

Relerence N.8 MELWAY REF. MAP 12fG.5 Survey ;.:Lo: Date 0c-r. 1991 MUNIC!PALITY: SHll4E OF DIAMOND VALLEY -- Drawing NO. 3ASE MAP : M.M.8.W. YARRA 2500 / 16.24 Design w.c.e. Datum - SCHEME: KAMAC'!'~OKADRIVE ESTATE, STACE 5 CAPPIPIC; OF EXISTING MINE SHAFT, ADJACENT TO REYNOLDS RD., I. J. RICKARDS. DARNLEY 8 CO. PTY. LTD. Traced J.EE. Approval NORTH --3F KAMAROOKA DRIVE, WATTLEGLEN. CIVIL ENGINEERING CONSULTANTS Sheet I Of I ENDEAVOUR HILLS (L MONTMORENCY Checked s.L.0. PRINCIPAL: R0JIF.I LANDS PTY. LTD. 0 0 70 of 82 TELEPHONE: 700.5317 435.0802 // 71 of 82 3402a Environment Protection Authority Page : 64 3/04/95 STATE REGISTER OF CONFIRMED CONTAMINATED SITES ite Id File name Site status ----__ ------197 Cyanide Disposal Hurstbridge Confirmed Information )cation

I------!-70 Reynolds Rd MEL/VCR Ref : 12 G5 (MI nttle Glen Easting : 339 620 -. ic 3096 Northing : 5 828 950 AMG Zone : 55 Priority :N tnicipality : NILLUMBIK SHIRE COUNCIL roperty Details .------!-70Reynolds Rd ittle Glen .c 3096 mer/Occupier details .---_------bwne r ) bjim Lands Pty Ltd ! Greenhill Rd 'eensborough .c 3088 intaminants of concern ...... 'anide complex (total) lmments --_--- esent land use - Horse agistment. st land use - Gold mining. e site is cleared rural land and is about 250 m2 in size and the neshaft occupies only a small portion of the site. mineshaft on the property was used for the disposal of cyanide stes. The disposal of these wastes occurred between 1955 and 1965. he depth at which cyanide was deposited was reported to be in the der of 30m to 70m below the ground surface. A has no reaso to believe that there is a threat to public health a result of th3 historic disposal of waste at this site. e land is zoned Reserved Living.

72 of 82 73 of 82 GEO & HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL

1.O SITE RECONNAISSANCE

Site reconnaissance involves the preliminary delineation of hot spots and contamination boundaries, and the collection of data to assess the risk of migration. Three steps are taken to obtain this information:

1. General data search for the area including, but not limited to, geological maps, services and utilities maps and data, hydrogeological data relating to the site and its surroundings. In addition, a description is made of the businesses operang on neighbouring properties as well as nearby if they are considered a potential source of contamination.

2. Historical search of the operations carried out on site, which includes interviews with local residents, the operator or past operator of the site and may involve obtaining copies of past permits issued for the site and interviews with local, regional and state authority/personnel. Plans of the current structures on the site and other maps and documentation showing site modifications and the reasons for them aid greatly in the understanding of conditions existing on the site.

3. A soil -gas survey complemented by vapour screening of samples in sealed jars obtained during drilling the holes is used to identify hot spots and/or to check up on historical data highlighting the possible presence of hot spots.

2.0 SOIL GAS TESTING

Soil gas surveying is carried out using steel or stainless steel probes with disposable or retractable points to obtain a sample of the soil vapours at depth. Where the soil gas survey is conducted as part of well or borehole installation. Soil at 0.5 m depth intervals is sampled into sample jars which are sealed with household plastic film. The vapours are analysed with PID equipment with a 10.2 eV lamp suitable for detection of hydrocarbons. Calibration is carried out using benzene vapour in air at a concentration of 22.7 ppm. The calibration gas is supplied by a NATA registered laboratory.

3.0 SOIL SAMPLING

3.1 Sampling Equipment

Boreholes for environmental sampling of soil and groundwater in unconsolidated sediments are preferentially drilled by hand auger. Geo & Hydro utilises only Eijkelkamp equipment specially designed for environmental research. On average, 10 different auger pods are at hand in the field to drill the soil most efficiently while minimising smear along borehole walls. Most auger pods allow taking of soil samples with minimal disturbance, which enables inspection of thin layers of soil down to 10 mm. It equally allows the sampling of individual layers without cross contamination with material from other layers. Due to the practically undisturbed nature of the sample, this can be verified visually in the field. For collapsing hole conditions, ABS casing is available to shield the auger from touching the top layers and to avoid hole collapse near the bottom of the hole. For soil sampling below the watertable, a thin wall tube (Shelby tube) sampling system is used to avoid contact with possibly contaminated water.

Page - 1 74 of 82 GEO & HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL

3.2 Sampling Procedure

1. Discuss borehole locations with site personnel to clear any underground utilities.

2. Determine appropriate site safety conditions.

3. Put on disposable latex sampling gloves prior to sampling; decontaminate sampling equipment. ,+

4. Collect samples. Samples for TPH and heavy metal analysis are removed from the soil by auger and placed into 200 ml acid washed glass jars capped with foil-lined lids. Samples for BTEX are preferentially collected by exposing a fresh soil surface and immediately forcing the 30 ml glass vial into the soil. The vial is immediately capped with a teflon septum and aluminium crimp seal. In other situations, BTEX is sampled using stainless steel probes.

5. Label sample container using waterproof pen. Labels to include:

(a) Sample identification number (b) Job name or job number (c) Date of sample collection

6. Check to make sure sample is tightly sealed and place in cooler immediately.

7. Log the remaining sample on the field bore log or monitoring well log. Information to include:

(a) SoiI/rock type (b) Colour (c) Grainsize, sorting, angularity, inclusions (d) Moisture conditions (e) Staining and odour (9 Volatile organic concentration as measured with a calibrated PID and LEL 8. Fill out "chain of custody" form.

9. Store sample set under refrigeration after sampling and prior to transportation.

IO. Transport iced sample set via overnight courier with "chain of custody" to a NATA registered environmental laboratory.

11. Store samples not sent to laboratory for one month after issue of report.

12. Decontaminate and rinse all sampling equipment between sampling locations, to prevent cross contamination.

3.2.1 Sampling Procedure: surface samples

1. Sampling protocol is as for standard soil samples as set out in s3.2 (above). The sample collection depth is standardised at 0.1 m.

Page - 2 75 of 82 GEO & HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL

4.0 GROUNDWATER SAMPLING

4.1 Monitoring Well Installation

Monitoring wells are used to determine the sub surface conditions and to provide a more quantitative measure of the lateral and vertical extent of any separate, adsorbed or dissolved-phase contamination.

The data collected during the background investigation and soil gas survey is analFsed to determine the optimum number and locations of auger holes, soil borings and monitoring wells.

The positioning of monitoring wells is based not only upon the location of areas of possible contamination delineated during the soil gas survey, but is also dependent upon the location of potential sources and receptors of contaminants. The locations of drilling obstructions, such as storage tanks, sub surface piping, overhead power lines and canopies, or impenetrable zones, are also a factor in the selection of monitoring well locations. The location of the monitoring wells are shown on the plans provided with each report. - Critical contaminant source locations may include but are not restricted to:

(i) aboveground and underground petroleum storage tanks; (ii) pump islands and bowsers; (iii) tank fill points; (iv) vehicle and rail car fill gantries; (v) product lines; (vi) pump manifolds; (vi) drum loading and storage areas.

Critical contaminant conduits include:

(i) any underground piping or wiring; (ii) areas of increased permeability (where flow rates are higher), such as any backfilled areas behind retaining walls, in sand backfill under the forecourt or in product line trenches.

Critical contaminant receptors include:

(i) areas downgradient of any of the identified source locations, including off site utility lines and vaults; (ii) areas immediately upgradient of lateral aquicludes (regions which restrict the flow of groundwater and contaminants); (iii) local depressions in the watertable; (iv) areas of higher permeability, backfilled areas or sandy zones; (v) water bores or surface water bodies.

Page - 3 76 of 82 GEO & HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL

The wells are installed using 100 or 70 mm Eijkelkamp augers. If the soil is semi- consolidated, a motorised auger is used. Hollow stem augers are the preferred option for deep holes, although the environmental engineer in charge may decide to use a casing driving drilling procedure to avoid contaminating upper zones with contaminated water. Soil samples are generally collected at 1.0 m intervals, at predetermined depths or whenever a soil change is detected, and are described in a log on site by the Geo & Hydro environmental scientist. The samples are transported to the Geo & Hydro office or registered laboratory and samples not used in the laboratory process are stored for one month after report issue. The monitoring well depth is limited to whichever of the fo'lfowing occurs first:

(a) at least 0.5 m below low watertable depth, which is to be determined by the soil scientistlenvironmental engineer on site; (b) an impermeable barrier (ie drill bit refusal); (c) a pre-determined depth.

Monitoring wells are constructed of threaded or internally flush jointed PVC casing and screen. Slot size is commonly 0.5 mm, however different sizes may be used if local conditions require this. The diameter of the wells is 25 to 100 mm, depending on the intended use and depth of installation. Fifty millimetre is the most common size for standard monitoring wells.

The well screens are placed from 0.5 m below lowest seasonal watertable to at least 0.5 m above the highest seasonal watertable, if free floating hydrocarbons are expected. Should,the well be placed to sample water only, the. screen is placed below the lowest seasonal watertable to avoid oxidation of the water during sampling: The gravel pack of 8/16 or 18/40 sand extends to 0.3-0.5 m above the screen and the bentonite seal has a minimum length of 0.5 m.

Wells installed on other than guarded or secured property can be covered with a lockable toby box or protective casing with lock as is required by law in several states of Australia.

Each well is developed using peristaltic pump, electrical submersible pump, bladder pump, diaphragm pump or positive air displacement pump, depending on sustainable flow rate and depth to groundwater. Watertable drawdown is kept at less than 1.0 m, as excessive air introduced in to the formation by pumping will change the chemical equilibrium of the aquifer.

After the development, each well is left at least several hours, but preferably overnight, before recording the fluid level using acoustic or electrical sounding devices. If free product is present, water/product sensitive paste or the Eijkelkamp liquid interface sampler is used to determine the thickness of product.

Prior to sampling, purging of the well is carried out using similar equipment to that used during well development, taking care to ensure watertable drawdown is less than 0.5 m. If a bladder pump or electrical submersible pump is used, it is set to low discharge rate for sampling. Samples can also be collected using a teflon bailer. Sampling equipment is decontaminated after sampling each well, unless dedicated equipment is used for each well.

Page - 4 77 of 82 GEO 81 HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL

Sample size, container type and preservative used, as well as field filtration needs are set for each job.

The following details are recorded on each sample container label and on the chain of custody form:

(a) Sample number (client code/project numberhvell number/sample number) (b) Date (c) Preservative used -9

Place samples in a cooler with ice and refrigerate (if required). Fill out a chain of custody form and send with the water sample by overnight courier to a National Association of Testing Authorities, Australia (NATA) registered environmental laboratory.

4.2 Survey of Wells and Water Levels

The location of each well and the level of the top of well casing (not cap) is surveyed when all wells are installed. In addition, the following are also surveyed: height above/belowground level, levels of other relevant points such as TIT, water level in TIT, drains, pits, streams, sewer and stormwater lines. This survey is carried out using either tape and water level or theodolite and staff. Larger areas with many obstructions are surveyed from the air where appropriate.

Water level and product thickness.surveying,is carried out in all wells within the shortest possible time span, usually within a few hours. If tidal influence is expected, the time at ; which each measurement is taken is recorded and the wells nearest and furthermost from shore are re-measured at least four times during the survey and correlated with published tidal information. This enables a correction to be made for tidal fluctuations.

Page - 5 78 of 82 GEO & HYDRO PTY LTD Environmental Site Assessment Protocols CONFIDENTIAL 4.3 Analysis Techniques

Sample analyses for soil and water will be performed by National Analytical Laboratories Pty Ltd. Samples are analysed using the following techniques:

1. %H20: Victorian EPA Chemical Analysis of Polluted Soils, Nov; 1981 - Method No. 4.

.-rJ 2. Total Petroleum Hydrocarbons Water samples are analysed by NAL method (TPH): E104.12 based on US EPA method 418.1 with quantification by GC. Soils and sludges are analysed by NAL method E10452 using freon extraction of hydrocarbons and quantification by GC FID.

3. Heavy Metals: Water samples are analysed by NAL method E104.42 based on US EPA method 3005/6010. Soils are analysed by NAL method E102.2 based on US EPA method 3050/6010 (inductively coupled plasma (ICP) following a nitric acid digestion).

4. Mono-Aromatic Compounds Water and soil samples are analysed by NAL (BTEX): method E106.01 based on US EPA method 3810 and involves sampling straight into a headspace vial and analysis by gas chromatography using a photoionisation detector.

5. Polycyclic Aromatic Water is analysed by NAL method E108.12 based Hydrocarbons (PAH): on US EPA method 3510/8270. Soil is analysed by NAL method E108.62 based on US EPA method 3550/8270 (both GCMS).

6. Total Phenols: Water and soil are analysed by NAL method E122.61 based on US EPA method 420.1. 7. Extractable Organic Halogens Determined using US EPA 6402 standard modified (EOX): for soils, which involves extraction by acetone and hexane.

8. Dichloroethane, Dibromoethane: As for BTEX, with addition of ECD.

5.0 CHAIN OF CUSTODY FORMS

A chain of custody form, which also serves as an analysis request form, is prepared for all samples to be tested. This form records pertinent sample information and is filled out by the sampler prior to dispatch of the samples to the laboratory for testing. The original of the form is kept in the Geo & Hydro project file, and a copy is sent with the samples to the laboratory. Upon arrival at the laboratory, a laboratory representative checks and signs for the samples on the chain of custody form. Following analysis, the laboratory reference number is entered, and this verification is signed off by the laboratory prior to faxing the completed form back to Geo & Hydro where it is matched with the original. Page - 6 79 of 82 80 of 82 GLOSSARY

A level The background range of contaminants in the environment, contaminant levels in the range are

generally acceptable and no further site investigation is usually required.

B level The guideline level, or investigation threshold, below which no further action is usually needed

b- C level Indicates significant contamination

ANZECC Australian and New Zealand Environment and Conservation Council

Bilge pump Hand operated diaphragm pump used to purge wells before sampling I BTW Abbreviation for benzene, toluene, ethyl benzene and the xylenes c -c Short chain length hydrocarbon compounds, mainly petrol 69 c -c Short medium chain length hydrocarbon compounds, mainly petrol, some diesel 10 14 - c -c Medium - long chain length hydrocarbon compounds, mainly diesel, lubricating oil, fuel oil 1s 2a - c -c Long chain length hydrocarbon compounds, mainly heavy oils, grease 29 36 CED Catalytic element detector, an instrument for measuring the volatile content of a sample

COC Chain of custody; the line of responsibility for sample safety from time of sampling to analysis

COC form Papetwork listing sample details, ensuring samples get to the laboratory safely

Composite A sample made up of several individual samples composited from two or more sample or depth

locations

Duplicate A second (identical) sample taken to enable a check of laboratory accuracy

ECD Electron capture detector I EPA Environment Protection Authority FID Flame ionisation detector

GC Gas chromatograph IGroundwater Water naturally present beneath the ground surface Hand auger Hand operated soil drill (like a mini post-hole digger). Extensions can be added to drill deeper

holes

HPLC High pressure liquid chromatography

Microgram (pg) One millionth of a gram (1 pg per kilogram = 1 ppb)

Milligram (mg) One thousandth of a gram (1 mg per kilogram = 1 ppm)

I National Analytical Laboratories Pty Ltd

81 of 82 GLOSSARY CONTINUED

NATA National Association of Testing Authorities, Australia

NHMRC National Health & Medical Research-Council

oc Organochlorine pesticides .* PAH Polycyclic aromatic hydrocarbons

PCB Polychlorinated biphenyls

Peristaltic pump Small hand operated pump used to sample water from ground water monitoring wells

PID Photoionisation detector; an instrument for measuring the volatile hydrocarbon content of a I/ Isample Plume The length, width and thickness of contamination above and/or within the groundwater I I Parts per billion: a measure of the relative presence of one substance (eg toluene) in another I(eg water)

/PPm Parts per million: a measure of the relative presence of one substance (eg toluene) in another

. leg QNAC Quality assurance/quality control: duplicate samples and or analyses taken to check result

accuracy

THC Total hydrocarbons

TIT Triple interceptor trap

volatiles A laboratory measure of the total amount of all volatile compounds in a sample

L TPH Total petroleum hydrocarbons

TPH (GC) A measure of TPH concentration for each of the main petroleum fractions comprising the

sample by gas chromatography (GC)

TPH (IR) A measure of TPH concentration, as a single total figure by infrared spectroscopy (IR)

US EPA United States Environment Protection Authority

UST Underground storage tank IL voc Volatile organic compounds

Watertable The upper limit of the groundwater

IlWell purging IPumping water from well before sampling to ensure water sample is representative

Well screen Slotted pipe forming bottom section of groundwater well (slots allow groundwater to enter well)

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