EIS 1509 Tharbogang Landfill

EIS 1509

Tharbogang landfill - groundwater assessment and

contamination remediation plan. NSW DEPT PRIMARY INDUSTRIES

lll~~ ll~~ 1~~ ll 1~~ lll~ ll 1~~l 1~ ll~ AA067862

r I AWL6409/1-BG trh 19 May 2000

Griffith City Council PG Box 485 GRIFFITH NSW 2680

Attention: Mr Peter Higgins

T Dear Sir, (T5

RE: THARBOGANG LANDFILL - GROUNDWATER ASSESSMENT AND CONTAMINATION REMEDIATION PLAN

Please find herewith our draft report on the hydrogeological assessment and groundwater contamination assessment at Tharbogang Landfill, The report will be finalised when we receive comments from yourselves and/or the EPA.

Please do not hesitate to contact Terry Harck in our Sydney office, or the undersigned if you require any further information regarding this report.

ehaIf of

7C;FZil~ EOSCIENCES PTY LTD

ANTHONY EDWARDS

Manager

142 Wicks Road North Rydo NSW 2113 Australia P0 Box 125 North Ryde NSW 1670 Australia Telephone +61 2 9888 7444 Facsimile +61 2 9088 9977 Coffey Geosciences Pty Ltd A0No513335516 Email [email protected] AWL6409/1-BG 19 May 2000

TABLE OF CONTENTS

INTRODUCTION

OBJECTIVE

SCOPE OF WORK

GROUNDWATER ASSESSMENT I

4.1 Hydrogeology of Tharbogang Landfill I

4.2 Current Groundwater Users 2

4.3 Monitoring Bores 2

4.4 Monitoring Results 3

4.4.1 Exceedance of Guidelines 5 4.4.2 General Comments 6

DISCUSSION 6

CONCLUSIONS 7

RECOMMENDATIONS

GROUNDWATER CONTAMINATION REMEDIATION PLAN 8

8.1 Existing Landfill 8

8.1.1 Leachate Reduction Plan 8 8.1.2 Groundwater Monitoring Plan 8 8.2 Stage 2 Landfill 8

8.2.1 Surface Water Management 9 8.2.2 Leachate Management 9 8.2.3 Groundwater Management 10

TA B LE S

Table 1 Summary of Monitoring Bore Drilling Results

Table 2 Tharbogarig Landfill Groundwater Analytical Results

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TABLE OF CONTENTS (continued)

FIGURES

Figure 1 Location of Landfill

Figure 2 Location of Monitoring Bores

Figure 3 Cross-section Through Monitoring Bores

APPENDICES Appendix A Laboratory Reports

Appendix B Groundwater Monitoring Analytes

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AWL6409/1-BG 19 May 2000

INTRODUCTION At the request of Griffith City Council, Coffey Geosciences Pty Ltd (Coffey) conducted a hydrogeological assessment review of the Tharbogang Landfill, Griffith, NSW (Figure 1). The assessment was commissioned by Mr Peter Higgins of Griffith City Council,

OBJECTIVE The objectives of the assessment is to address issues outlined in a letter from NSW EPA (19 April 2000, Ref 235451A1/GFF2435) regarding groundwater at the site including:

A review of existing groundwater monitoring information;

To develop a plan to remediate groundwater contamination downgradient of the landfill, if present; and To develop a plan to protect the local groundwater resource from further contamination.

3. SCOPE OF WORK The scope of work comprised reviewing available information relevant to groundwater occurrence and quality issues at the site including: Douglas Partners Pty Ltd Report 14221 (March 1991) - Report on Geological Investigation for Proposed Road Aggregate Quarries, Griffith, NSW;

o Coffey Geosciences Pty Ltd Draft Report AWL6409 (19 July 1999) Preliminary Hydrogeological Appraisal of Proposed Tharbogang Landfill Site;

Coffey Geosciences Pty Ltd Report AWL6409/2-AA (20 August 1999) - Percolation testing and gas monitoring at Tharbogang Landfill; Coffey Geosciences Pty Ltd Draft Report AWL6409/1 (20 September 1999) - Draft Environmental Impact Study, Tharbogang Landfill;

Analytical results of monitoring well sampling in January 2000; and

Analytical results of monitoring well sampling in March 2000.

4. GROUNDWATER ASSESSMENT

4.1 Hydrogeology of Tharbogang Landfill From the draft Coffey report (AWL6409, July 1999), the site elevation varies from 174m AHD along the southern boundary ridge line to approximately 128m AHD at t6e northern boundary over a distance of approximately 700m. The site geology comprises sandstone and siltstone with conglomerate bands. The Mailman Gap Conglomerate is a coarse pebble sandstone and conglomerate unit which overlies the Jimberoo Member, a medium-coarse grained sandstone. The Mailman Gap Conglomerate contains low strength siltstone or very fine-g rained sandstone bands (Douglas Partners, 1991). AWL6409/1-BG 2 19 May 2000

Both units are silicified and were assessed to have negligible primary porosity although open jointing in both I- units is evident in the quarry. The units were assessed to have low to moderate permeability and low groundwater storage capacity. Surficial soils were assessed to have a permeability of the order of 0.2m/day with moderate moisture storage capacity (Coffey draft EIS, 1999).

Douglas Partners (1991) boreholes were reported to have no groundwater inflows to a depth of at least iBm in the vicinity of the quarry. Two of three shallow monitoring bores on site were observed to be dry (Coffey, July 1999) and superficial soils to a depth of 3m are also characterised by a lack of Interface (perched) groundwater. I The recharge potential of the site is considered to be low due to the significant annual rainfall-evaporation deficit of 1463mm and is constrained to low frequency-high intensity rainfall events.

4.2 Current Groundwater Users

Based on assessment of Department of Land and Water Conservation (DLWC) records, there are five registered bores in the vicinity of the site.

Bore GW002556 is located approximately 7km northwest of the site and is about 1 00m deep. Water bearing zones were encountered in sandstone at 61m and 97.5m during drilling. The total airlift yield obtained was about 0.25LIs and the groundwater level is recorded as 57.9m below ground.

Bore GW002635 is approximately 7km north of the site. This bore is about 53m deep and water was encountered at 49.4m during drilling in sandstone with an airlift yield of 0.16L/s. The static water level is recorded as 42.7m below ground.

Bores GW051023, GW051024 and GW051025 are located near a basalt quarry approximately 3km west southwest of the site and were reportedly drilled for groundwater exploration purposes. No yield information is reported but all three holes intersected water-bearing fractured basalt and volcanic material. Total hole depths varied from 24m to 31.7m. The recorded depth to groundwater varied from im to 3.7m below surface. The bores are recorded as backfilled.

4.3 Monitoring Bores

Drilling results from four monitoring bores drilled at Tharbogang Landfill are summarised in Table 1. The location of the bores is indicated on Figure 2.

From Table 1, groundwater at the site is generally hosted in sandstone and clayey sand units. This is consistent with the Mailman Gap Conglomerate which includes sandstone and low-strength siltstone bands.

The measured groundwater levels (Figure 3) in the monitoring bores suggest a northeast dipping hydraulic gradient of approximately 0.04 and groundwater flow towards the Tharbogang Swamp. Groundwater flow is expected to generally follow topography and concentrate below surface dainage features. Bore BH1 is upgradient of the existing landfill with BH2 adjacent, BH3 slightly downgradient and adjacent to the leachate collection pond and BH4 downgradient of the landfill in a drainage.-gully which drains to the swamp. AWL6409/1-BG ci I 19 May 2000

TABLE I - SUMMARY OF MONITORING BORE DRILLING RESULTS

Bore Total Depth Water inflow depth Geology Screened depth Water Level Number (m) (m) (m) (m)

BH1 38 25.6 Clayey Sand 21 to 28 15.6 26.2 Clayey Sand 28.8 Sand 29.4 Sand i 35.6 Clayey Sand 36.2 Clayey Sand

BH2 42 35.5 Clayey Sand 30 to 42 22.0 36.6 37.4

BH3 35.5 31.8 Sandstone 24 to 35.5 18.9 32.5 33.4 34.8

BH4 38.5 36.6 Clayey Sand 26 to 38.5 15.4 37.2 Clayey Sand 37.8 Coarse Gravel

The significant head difference between water inflow depths and groundwater levels indicates confined conditions and suggests that groundwater may upwell downgradient in the swamp.

4.4 Monitoring Results Copies of analytical results of groundwater sampling from four monitoring boreholes on site are included in Appendix A. Two monitoring rounds have been conducted at the end of January 2000 and the beginning of March 2000. The following analytes were tested in the samples: January 2000 - pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Bicarbonate, Total Kjeldahl Nitrogen (TKN), Ammonia, Nitrate Nitrogen, Chemical Oxygen demand (COD), Total Organic Carbon (TOC), Phenols, Organochlorine Compounds (0CC) and Organophosphate Compounds (OPC).

March 2000 - Biological Oxygen Demand (BOD), TDS, Total Phosphorous, Aluminium, Arsenic, Barium, Cadmium, Cobalt, Copper, Lead, Mercury, Zinc, Total Chromium, Hexavalent Chromium, OPC, Total Petroleum Hydrocarbons (TPH), Benzene, Toluene, Ethylbenzene, Xylenes (BTEX), Volatile Chlorinated Hydrocarbons (VCH), 0CC, Polyaromatic Hydrocarbons (PAH). Analytical results for PAH, 0CC, VCH, BTEX, OPC, ammonia, arsenic, barium, mercury, total chromium and hexavalent chromium were all below laboratory detection limits and are not considered further. The remaining analytical results are summarised and compared to ANZECC (1992) Water Quality Guidelines for Protection of Aquatic Ecosystems in Table 2. AWL6409/1 -BG 4 19 May 2000

TABLE 2 -THARBOGANG LANDFILL GROUNDWATER ANALYTICAL RESULTS

Analyte Date 131-11 BH2 BH3 BH4 ANZECC1 pH 01/00 7.2 6.5 6.7 7.0 6.5-9.0

EC(pS/cm) 01/00 4140 660 5960 3980 1500

TDS(mg/L) 01/00 2902 458 4136 2464 <1000

03/00 5452 460 3778 2572 <1000

DO (mg/L) 01/00 32 1,5 3.2 1,9 >6

Bicarbonate (mg/L) 01/00 410 99 559 523 -- 2 TKN (mg/L) 01/00 2,8 11.2 2.8 2,6 0 1 to 0.5

Nitrate (mg/L) 01/00 25 50 5 30 0.1 to 052

COD (mg/L) 01/00 377 373 335 305 --

TOO (mg/L) 01/00 41 76 440 36 --

Phenol (mg/L) 01/00 0.5 0.6 1.0 0.8 0.05

BOD (mg/L) 03/00 54 60 55 108 --

Total P (rngIL) 03/00 0.5 0.5 0.2 0.4 0.005 to 0.05

Aluminium (mg/L) 03/00 <0.1 1.3 <0.1 <0.1 0.1

Cadmium (mg/L) 03/00 0.013 0.003 0.009 0.009 0.002

Cobalt (mg/L) 03/00 0.08 <0.01 0.06 0.06 --

Copper (mg/L) 03/00 0.04 0.04 0.04 0.09 0.005

Lead (mg/L) 03/00 0.15 0.18 0.19 0.06 0.005

Zinc (mg/L) 03/00 0.47 0.53 0.07 0.60 0.05

TPH C6-C9 (mg/L) 03/00 0.7 0.9 1.3 1.0 --

Notes:

1 Australian and New Zealand Environment and Conservation Council (ANZECC, 1992) Guidelines for the Protection of Aquatic Ecosystems.

-- No guideline

2 Total N should be in the range 0.1mg/L to 0.5mg/L for reservoirs and lakes.

Total P should be in the range 0.005mg/L to 0.05mg/L for reservoirs and lakes. I AWL6409/1-BG 5

I I 4.4.1 Exceedance of Guidelines I The ANZECC (1992) Water Quality Guidelines do not generally apply to groundwater but are considered relevant in this case since Tharbogang Swamp is likely to be the receiving water body for groundwater from the site. I Based on the results in Table 2, the sampled groundwaters exceed the ANZECC (1992) guidelines with respect to the following parameters: 1 • Dissolved Oxygen in all bores; Cadmium, copper, lead and zinc in all bores; I • Phosphorous in all bores; Nitrogen (TKN, Nitrate) in all bores; I • Phenol in all bores; Salinity (comprising EC and TDS) in BH1, BH3 and BH4; and I • Aluminium in BH2. Groundwater at depth is naturally depleted in dissolved oxygen relative to surface water. The ANZECC (1992) guidelines are therefore not generally applicable to groundwater and the low DO concentrations do not I necessarily indicate contamination from the landfill.

The copper and zinc concentrations exceed ANZECC (1992) aquatic protection guidelines but do not exceed I ANZECC (1992) human health guidelines of 1.Omg/L and 5.Omg/L respectively. The copper and zinc exceedances are not considered significant since the background concentrations are in the same general range as the downgradient bores. I Cadmium and lead in all four bores exceed the human health guidelines of 0.005mg/L and 0.05mg/L respectively in addition to the aquatic ecosystem protection guidelines (Table 2). The cadmium concentration in the background bore is higher than in the downgradient bores. Similarly, lead in the background bore is of a similar order of magnitude to downgradient bores which suggests an upgradient metal source. The exceedances are therefore not considered significant.

I The concentration of phenol in all four bores exceeds the aquatic guideline of 0.05mgIL but this may not be significant since the background concentration is elevated which suggests local groundwater is elevated with respect to this compound. Further sampling is required to assess whether landfill leachate is generating I elevated phenol concentrations in BH3 and BH4.

The nutrient concentrations (N and P) generally exceed the ANZECC (1992) guidelines for reservoirs and I lakes but this is not considered significant since the background is elevated to a similar or higher degree with P in BH1 greater than P in BH3. Elevated N concentrations in BH2 may be a result of nitrogenous explosive residue from blasting in the quarry.

I The salinity exceedances in bores BH1, BH3 and BH4 are not considered significant since the background bore is elevated and they fall within the 1500pS/cm to 16000pSIcm range reported for local groundwater (Coffey draft EIS, 1999). The salinity ranges are significantly less than the 10000pS/cm reported for I Tharbogang Swamp (Coffey draft report 1999) and appear to vary with BH1 EC changing from 2902pS/cm to 5452p S/cm from January to March 2000. AWL6409/1-BG 6 I 19 May 2000 I

4.4.2 General Comments I TDS in BH3 is the highest of the monitored bores at 4136mg/L in Januray 2000 and was flagged as of concern by NSW EPA. However, this is within the natural range reported for groundwater in the area and does not directly indicate groundwater contamination by leachate from the landfill.

Bicarbonate concentrations range from 99mgIL to 559mg1L with the highest value in BH3. Although bicarbonate is an indicator of microbial respiration, similar order of magnitude bicarbonate concentrations in I BH1 (410mg/L), upgradient of the landfill and BH4 (523mg/L), downgradient of the landfill, suggest that bicarbonate is generally elevated in the local groundwater and may not be attributable to landfill leachate.

The TOO concentration of 440mgIL in BH3 is an order of magnitude higher than in the other bores which I indicates groundwater in this bore has a significant organic carbon content. Similarly, the elevated TKN of 11.2mg/L in BH2, adjacent to the landfill, suggests the presence of reduced nitrogen compounds in the I background groundwater. The COD concentrations in the bores range from 305 mg/L to 377 mg/L with the highest concentration being in borehole 1 (BH1). This suggests the groundwater could have been contaminated by chemically reduced species from the area to the south west of the borehole. This could occur during periods when the groundwater level in the tip area was relatively low and infiltration water from the upper zone of the adjacent I farm area could intercept the groundwater flow to the north east. There is currently no NSW guideline for TPH in water. NSW EPA (1994) Guidelines for Assessing Service Station Sites indicate a guideline concentration based on the NSW Clean Waters Regulation (1972) criterion I that discharges be visually free of oil and grease which is approximately equivalent to lOmg/L TPH. The TPH concentrations obtained in the monitoring bores are well below this guideline and are therefore not considered 1 significant. • DISCUSSION I Registered bores GW002556 and GW002635 indicate that groundwater to the north of the landfill site is associated with sandstone and that groundwater levels are greater than 40m below surface. The monitoring bores on site indicate that the sandstone and clayey sand are waterbearing and that groundwater level varies I from 15.4m to 22m below surface. Groundwater in the monitoring bores exceeds ANZECC (1992) guidelines with respect to several parameters, I however, based on previous reports, the quality appears to be within the general range for groundwater in the local region. Higher TOO concentrations in BH3 suggest exposure to water with a significant organic content, possibly indicative of microbial activity from landfill leachate. Leachate contamination is generally I accompanied by increased concentrations of indicators of organic activity such as nutrients (N and P) and carbon compounds which is not noted in the anlytical data. COD and nitrate groundwater contamination may originate from upgradient of BH1 under conditions described I in Section 4.4.2 and may account for the TKN and TOO results in BH2 and BH3, however, there is insufficeint data to confirm this. metals are generally elevated in the upgradient groundwater and are generally at a lower I concentration in BH3, downgradient of the landfill. The bicarbonate, TOO and phenol results indicate landfill leachate contamination may be present I downgradient of the landfill, however, the background is higher than downgradient groundwater quality in a I I AWL6409/1-BG 7

number of other analytes. Longterm trends in groundwater quality at the site should be regularly assessed so that appropriate action can be taken in the event groundwater contamination by leachate is confirmed.

Given the concerns expressed by the NSW EPA regarding potential groundwater contamination at the site, resampling of the bores, measurement of field parameters (including pH, DO, redox, EC, alkalinity and temperature) and laboratory analysis of the groundwater quality is required.

The thin, permeable soil cover over fractured and jointed bedrock could enable infiltration of runoff and leachate from the landfill and result in groundwater contamination. The limited groundwater storage capacity and complex fracturing of the site bedrock suggests a low potential for pump and treat systems to remediate contaminated groundwater. Protection of groundwater should therefore be directed at reducing the potential for leachate infiltrating to groundwater by lining new landfill cells, capping old cells, use of clean stormwater diversion and collection of contaminated site runoff in lined retention ponds.

6. CONCLUSIONS

From the available information and water quality data it is concluded that:

Groundwater at Tharbogang Landfill is held in fractured and jointed conglomerate and sandstone bedrock;

Groundwater levels vary from 15.4 to 22m below surface and the hydraulic gradient of 0.04 is to the northeast resulting in groundwater flow towards Tharbogang Swamp;

Groundwater quality in BH2 and BH3 may have been impacted by surface water affected by landfill leachate derived organic activity although there are indications that other groundwater quality parameters are elevated upgradient of the site; and

The potential for groundwater contamination in additional landfill stages at the site should be reduced through the use of landfill linings, capping, effective surface water management as well as leachate collection and treatment.

7. RECOMMENDATIONS

Based on the assessment of the Tharbogang Landfill site hydrogeology, the following recommendations are made:

A groundwater monitoring programme should be established to measure groundwater levels and quality in the four existing monitoring bores on a quarterly basis for one year. The analytes to be tested in the samples should include (NSW EPA Solid Waste Landfill Guidelines, 1996, p22): Alkalinity, Ammonia, Calcium, Chloride, Fluoride, Iron, Magnesium, Manganese, Nitrate, pH, Total phenolics, Potassium, Sodium, Sulphate and Total Organç Carbon. Field parameters including pH, DO, alkalinity, redox and temperature should be measured at the time of sampling. After one year, the analytes and monitoring frequency should be reassessed and an ongoing schedule recommended.

A groundwater contamination protection plan, including the use of landfill linings, a leachate collection system and runoff control should be implemented. This plan is outlined in the following sections. AWL6409/1-BG 8 19 May 2000

8. GROUNDWATER CONTAMINATION REMEDIATION PLAN

8.1 Existing Landfill Groundwater impacts from the existing landfill are assessed to be of low significance since background water quality appears to be significantly impacted from other sources. In addition, the receiving water body (Tharbogang Swamp) is significantly impacted from other sources and there are no registered groundwater users in the flowpath between the landfill and the swamp.

Potential groundwater impacts arising from the existing landfill will be managed through the implementation of measures to reduce leachate generation and ongoing assessment of the groundwater quality.

Groundwater remediation technologies will be implemented if groundwater monitoring results suggest contamination levels are increasing.

8.1.1 Leachate Reduction Plan

The existing landfill will be rehabilitated through contouring, capping and revegetation. Leachate generation in the existing landfill will then be reduced through evapotranspiration from established vegetation and the high climatic evaporation rate will reduce the potential for infiltration of rainwater through the low permeability cap.

Stage 1 and Stage 2 landfills will be kept physically separate to facilitate environmental management.

8.1.2 Groundwater Monitoring Plan The existing network of four groundwater monitoring bores at Tharbogang landfill including one bore upgradient of the proposed Stage 2 landfill (quarry) and three other bores along a gully downgradient of the quarry will be maintained and monitored.

In accordance with NSW EPA Environmental Guidelines: Solid Waste Landfills (1996), it is proposed to implement a programme of quarterly groundwater monitoring comprising:

. Measurement of groundwater level in each monitoring bore; Purging of two to three well volumes from each bore until pH and redox measurements have stabilised; Collection of a groundwater sample from each bore using a bailer or positive displacement pump;

Measurement of field parameters including pH, redox, temperature and alkalinity;

Collection of quality control samples; Laboratory analysis of samples for the parameters listed in Table 2 of the NSW EPA Environmental Guidelines: Solid Waste Landfills (1996), a copy of which is included in Appendix B;

Data assessment; and

Compilation of an annual groundwater monitoring report.

8.2 Stage 2 Landfill The proposed site will be converted back to a natural grasslland/woodland following rehabilitation. During operation, surface water and leachate generation will be managed as outlined in the following sections. AWL6409/1-BG 9

8.2.1 Surface Water Management I The surficial soils have been identified as having poor to marginal water holding ability and are susceptible to erosion. I The site catchment is limited to the eastern side of a local north-south trending ridgeline which coincides with the southern boundary of the site. The site is traversed by three natural drainage depressions which drain to a perched drainage depression - the Tharbogang Swamp which is affected by salinity degradation from rising I water tables (Coffey draft EIS, 1999). The major source of water catchment in this locality is from rainfall and aerial irrigation of pastures growing I lucerne and grains on lands to the north and east. The proposed stormwater management measures include:

. Temporary cutoff drains and/or diversions banks will be constructed across the landfill site to divert I surface water runoff away from the active tipping face.

. Stormwater diversion drains will be constructed around the perimeter of the site that direct flow to I natural drainage gullies. Energy disspaters and erosion protection measures will be incorporated into the design of the drains.

. The final capped surface will be sloped and drained to promote revegetation, minimise erosion and I to prevent ponding of stormwater.

. Two stormwater/siltation collection dams will be built on site to collect and retain waterborne I sediment and particles.

8.2.2 Leachate Management I Leachate will be collected, stored and recycled within the boundaries of the site with no offsite discharge. The following measures will be undertaken:

I Leachate collection drains will be installed in the base of cells and directed towards leachate storage dams;

. Leachate storage dams will be constructed from suitable clay material, compacted to at least 95% of I Standard Compaction with a permeability of 10-9m/s. A standard water balance method will be used to size the pond; I . Leachate drains will be developed over the site to gravity feed leachate to the dams where it can be treated;

. A leachate recycling system (involving pumping and irrigating leachate over rehabilitated cells) may I be required following detailed design to ensure that leachate is collected and retained on site.

A regular monitoring and maintenance programme of the site will be implemented. The programme will I involve: . Monitoring the clay cap for cracks and failures and repairing these if they occur; I . Monitoring vegetation in revegetated areas for signs of stress;

0 Monitoring of odour, smell and nuisance problems; AWL6409/1 -BG 10 19 May 2000

8.2.3 Groundwater Management The groundwater monitoring programme developed for the existing landfill will be continued during operation of the Stage 2 landfill with additional monitoring wells installed as required. Monitoring wil be on a quarterly basis with monitoring frequency and analytes modified as required.

f of i ENCES PTY LTD

ANTHONY EDWARDS Manager Coffey GeescienCes PLy. Ltd borehole no VCN 056 335 516 TIRE BHI engineering log - V/57/777A sheet I of 5 hnreho e office iolo no AWl 6400/1

t GRIFFITH CITY COUtCIL hole commenced: 25/01/2000 principal GRIFFITH CITY COUtCIL hole completed: 25/01/2000 project: THA0000ANG LAY&IFILL [1.5 logged by: AE borehole location: OFFER FIGURE 1 checked by:

drill model and mounting. EPSON 3000 slope: -90 DEG R.L.Surface: 156.320 hole diameter: - 90 - bearing, datum: ,1 = material .5 15 structure and addittona] observations samples .ZT boil type plasticity or particle characteristics .5 2- -5 kP tests.etc ti . tDp colour, secondary and minor components - 1234 - INTEPBEDOEO SILTSTONE & SANDSTONE: generally white 0 H Devonian Sequence ::::: with some minor light brown bands. 156 •

METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX VS very soIL AS auger screwingx Nil no support N mud U undistorted sample (m) SYMBOLS AND SOIL soft AD auger drillingw C casing 0 disturbed sample DESCRIPTION S F firm TO roller/tricone PENETRATION Os bolk sample based on unified 2.3 4 E environmental sample St stiff washbore 1_1 little resistauce classiticatien system - VSt very stiff CT cable tool ranging to N standard peuelrat ion test. ______very slow progress H bard HA hand auger Na SPT sample recovered MOISTURE Fb friable UT diatube WATER NC SPT with solid cone o dr not measured D none observed VL very loose bit shown by sot ix VS vane shear most water level L loose B blank bit VI7 p4 pressoreseler If wet NO medium dense V bit OP dynamic penetrometer Wp plastic limit water outflow 0 dense IC bit MS water sample I'll liquidlimit water inflow VT very dense 5 e.g. APT I5ow._ PZ piezometer Coffey Geosciences PLy Ltd borehole no HEN 056 335 516 iIF? I BHI

engneerflg log - V/7/7/7/i sheet 2 of 5

hnrehnle nfhrw ,nh nm AWL 1140R/1 hole commenced. 25/01/2000 client: GRIFFITH CITY COUT'CIL hole completed. 25/01/2000 principal: GRIFFITH CITY COUfMIL logged by: HE project: THA0800ANG LAfCFILL E 1.S checked by borehole location: REFER FIGURE I slope -90 DEG RESurface: 15€.320ii dril] nodel and mounting: EDSON 3000 tearing. datum: hole diameter: 90 = 9 . caLertal .5. - strucLure and observaLions samples soil type plasticity or particle characteristics kP tests.etc . colour, secondary and minor compenents - 1234 - - INTERBEDDEO SILTSTONE & SANDSTONE generally white o y Devonian Sequence ..... with some minor light browo bands. EdO

7. 47

146

.45

CL SILTY CLAY. low plasticity, white, some line sand. N St INTERBEDDED SILTSTONE & SANDSTONE: generally white B H with some minorHght brown tunAs - 12 -

E44 7.

14 '

.42

15_ ...

.41 7. I7

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS. ETC CLASSIFICATION VS very soft AS auger screwingw Nil no support N mud U undisturbed sample (om) SYMBOLS AND SOIL S soft AD auger drillingW C casing 0 disturbed sample DESCRIPTION F firm 77 OTT roller/Iricone PENETRATION Os bulk sample based on unified 1 2 3 4 environeental sample St stiff N Washburn little resistance [ classification system VSt very stiff A CI cable tool ranging to N standard penetration test very slow progress + sample recovered MOISTURE H hard = HA hand auger N 5P1 Fb friable TT diatube WATER No SPI with solid cone dry not measured 0 none observed VL very loose Whit shown by suffix y VS vane shear N est water level I. loose B blank bit V47 PM pressuremeter N wet MIT medium dense V V bit OP dynamic penetrometer WP plastic In t water outflow dense 5 T IC bit wS water sample III liquid limit water inflow ND very dense :n e.g.AOl PU piezoeeter Coffey Geosciences Ply. Ltd ACN 056 335 516 :meeo LftL? engineerflg log - /7/7L1 sheet 3 of 5 i hnr'ohn 1 c nh nfl 8W1 C5Q/1 hole commenced. 25/01/2000 client: GRIFFITH CIIY C0UIL hole completed: 25/01/2000 principal. GRIFFITH CITY CJfIL logged by: hE I S prolect: IHA00006NG LANGFILL E checked by. borehole location: REFEP FIGURE 1 slope: -90 DEG OLSorface: 156.320m drill model and mounting: EPSON 3000 bearing, datum, hole diameter: 90

material o, struCture and additional observations samples type plaslicity or particle characteristics soil kPa secondary and minor components tests.etc = U7 colour,

1231 INTERBEDOED SILTSTONE & SANDSTONE: generally white H with some minor light brown bands. 140

115

133

CONSISTENCY/DENSITY INDEX SAMPLES, TESTS, ETC CLASSIFICATION METHOD SUPPORT very soft (on) SYMBOLS AND SOIL VS auger screwingi Nil no suppnrt 4 mud u undisturbed sample I AS soft disturbed sample DESCRIPTION S auger drillinge C casing 0 AD F I irn Os bulk sample based on unified PIT roller/tricone PENETRATION still 1 2 3 4 environnental sample St washbore E classification system resistance VSt very stiff standard penetration test: Cl tool ranging to N cable H hard very slow progress w + sample recovered MOISTURE band auger ______ SPI HA Fb friable SPI with solid cone Dl dialube HATER NC o dr none observed VL very loose not measured 0 VS vane shear mos1 0it shown by suf lie loose V7 water level PM pressuremeter wet B blank bit co medium dense OP dynamic pevetrometer ap plastic limit V V bit dense water outflow 445 water sample liguid limit I IC bit very_dense water in ow P2 piezometer yo u e AD! - fOo..- Coffey Geoscoences Pty Ltd borehole no ACN 056 335 516 TWO BH1

engineering log - vz7/,7/17A sheet 4 of 5 hnrehole off ire job no: AWl 640/1 hole commenced: 25/01/2000 client: GRIFFITH CITY CQUM1L hole complete 25/01/2000 principal: GRIFFITH CItY CDLfrCIL project: IFLA080GANG LANDFILL E I s logged by: AE checked by. borehole location, REFER FIGURE 1 P.L Surface: 156 320n drill node) and mounting. EDSON 3000 slope -90 DEG datum: hole diameter: 90 bearing,

= oaterlal .5 S[.PUCEUIe and addtonaI observatIons samples, 5O type:plasticity or particle characteristics kP tests. etc A . 'PT . Gi colour, secondary and minor components

1234 INTERBEDDED SILTSTDNE & SANDSTONE: generally white o ' ::::: with some minor light brown bands. 32

SC CLAYET SAND: low plasticity, light brown, grey, sand W NIJ/ fine to medlue grained,

130

SILTSJDNE: SANDTTGNE: white p

SP SAND: light brown, fine grained. AD

29 -

30 '! INTERBEDDED SILTSTONE 6 SANDSTONE: SANDS, while, H HO / :: light brown 26 .77

¶25

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION vs very soft AS auger screwinge Nil no support mud U undisturbed sample (nn) SYMBOLS AND SOIL S soft AD auger drillingw C casing D disturbed sample DESCRIPTION F firm PR ro)ler/tricnne PENETRATION 85 bulk sample based on unified I 2 3 4 sample St stiff washburn little resistance Eenvironmental classificatino system YSI very stiff CT cable tool runging to N standard penetration test very slow progress A hard HA hand auger ______ Nw SPI + sanple recovered MOISTURE Fb friable PT diatube MATER Nc SPI with solid cone D dry Xnot measured B none observed VL very loose wbit shown by suffix vs vase shear H nost water level L loose 3 blank bit V7 PM pressuremeter w wet OP dynamic penetrometer HO medium dense V V bit WP I st C limit water outf low 0 dense '1 I IC bit AS water sample iuid water ivf low Pd piezometer VA very dense 2 e ADI Coffey GeoscienceS Pty. Ltd ACN 056 335 516 LLFL7 I I BH1

engineering log - Sheet 5 of 5 rorehofe no hnrAhole office mb no AWL6409/f hole commenced: 25/01/2000 client: GRIFFITH CIII COUfCIL hole completed 25/01/2000 principal GRIFFITH CITY CDUfCIL logged by: AE project: THARBOGANG LAMJFILL E.l.S checked by: borehole location: REFER FIGURE 1 slope -90 DEG P.L.Surface: 156.320m I drill model and mounting: EDSON 3000 datum: Cole diameter: 90 bearing

material .5 struCture and additional oUservatlons I samples type plasticity or particle characteristics 'i . soil kPa ftLS tests,etc - 5. 55. colour. secondary and minor components

1234 INTERBEDDED SILTSTDNE & SANDSTONE: SANDS; white, light brown 24

Ii 33 -.. -

3 I -

1, 2

I 35

SC CLAYEV SAND. low plasticity, light brown, sand fine H MD 1 to nedium grained. 36 f. -

I 31.. LII

I PIFTIIHFTFR TNSTAI I CII TV PVC installed to 380m Borehole BHI Terminated at 3800 m Slotted 21m - 38m 38 Geotextile Filter Son Fitted I Aggregate to 20m Bentonite and Clay to Surface Steel Casing & Lockable Cap 39 Installed -

I .1]

an CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS. ETC CLASSIFICATION VS very soft AS auger screwingi Nil no support H mud U undisturbed sample Inn) SYMBOLS AND SOIL S self. AD auger drillingw C casing 0 disturbed sample DESCRIPTION F firm 5' UP roller/tricone PENETRATION Os bulk sample based on unified 2 3 environnental sample St stiff H washbore FL little resistance C classification systex lest: VSI very stiff U CT cable tool ranging to N standard penetration very Slow progress H hard HA band auger ______ Ni SPT v sample recovered MOISTURE CA friable of diatube 1ATER Mc SPT with solid cone o dry not measured D none observed VL very loose ibit shown by suff ix X VS vane shear H most water level L loose B blank bit V7 PH pressuremeter w wet OP dynamic penetrometer MD medium dense S. V V bit ' p p as ic mi- water outflow dense I IC bit MS water saople gad limit 5ow.— water inflow VD very dense :n e.g. Aol PU piezoneter Cof fey GeoscienCes Pty. Lid [borehole no ACN 056 335 516

BH2 I

engineering log - sheet I of 6

hnrhn1e nffirp inh no Awl 040V/1 hole commenced: 26/0I/2000 client. GRIFFITH CITY COUCIL hole completed: 26/01/2000 principal GRIFFITH CIlY COUNDIL logged by AE protect. TI4ARBOI3ANG LANDFILL E I S checked by borehole location: REFER FIGURE 1 slope: -90 DES lT.L.Surface: 148.64l0n drll model and mounting: E000N 3000 bearing: datum: hole diameter. 90

-- satera1 . structure and addItional observatIons samples soil type plasticity or particle characteristics kPd tests.etc - . colour, secondary and minor components - 1234 INTEPBEDDEO SILISTONE & SANDSTONE: generally white 0 H Devoniun Sequence with bands of light brown

t47 :

145

t43

.42

- low plasticity, light grey, white, A St -: CL SILTY SANDY CLAY: sand fine to cnarse grained. - INTERBEDDED SILTSTONE C SANDSTONE: generally white 0 H .41 with bands of light brown

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION VS very soft AS auger screwingx Nil no support A mud U undisturbed sample eel SYMBOLS AND SOIL s soft AD auger drillingA C casing 0 disturbed sample DESCRIPTION F firm DR roller/iricone PENETRATION Us bulk sample based on unified environmental sample St stiff A washbOre ittlnreistance E classification system YSt very stiff CT cable tool Vangingto N standard penetration test ______ery slow progress If hard HA hand auger NA SPT saepin recovered MOISTURE Fb friable UT diatube MATER Nc SPI with solid cone 0 d not measured 0 none observed AL very loose Abit shown by sullix y VS vane shear A mst water level PM pressurerneter L loose 5 B blank bit W wet MD medium dense V V bit UP dynamic penetruneter Wp plastic limit water outf low water sample 0 dense I TC bit AS WI liquid limit water inflow VP very dense u e.g. AOT SOw— pi piezoeeter Coffey Geosciences Ply Ltd. borehole no ACN 056 335 515 1 I BH2

engineering log - VZ7Z7Z7LI sheet 2 of 6 hnrhn1 nffirp inh nn' Awl eluq/1 hole commenced, 26/01/2000 client: GRIFFITH CITY COUICIL hole completed: 26/01/2000 principal GRIFFITH CIIY COUNDIL AC project: THARBOGAND LANDFILL E.I.S logged by: checked by: borehole location, REFER FIGURE 1 -90 DEG 0,L,Surface 148,5480 drill model and mounting EDSON 3000 slope. datum: hole diameter' - 90 bearing,

Gdterlal structure and addLionaI observatIons samPles soil type plasticity or particle characteristics kPa tests.etc U - colour, secondary and minor components

INTERBEDDED SILTSTONE & SANDSTONE: generally white H 77 with bands of light brown

.39 -

37 7.

13 -

134 7.

1.33

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION VS very soft US auger screwirgi Nil no support H mad U undisturbed sample (nm) SYMBOLS AND SOIL S soft AD auger drillingx C casing 0 disturbed sample DESCRIPTION F firm RR roller/tricone PENETRATION Os Sulk sample based on unified 1 2 3 4 environmental sample St still washbore little resistance F classification system VSt very stiff CT cable tool ranging to N standard penetration test' ______very slow progress H hard HO hand auger w 5PI + sample recovered MOISTURE Lb friable PT diatube WATER NC SPf with solid cone o d not measured 0 cone observed Vt. very loose ibit shown by suff + x VS vane shear H est water level liM pressuremeter L louse U' B blank bit H wet CD medium dense V V bit OP dynamic penetrometer Wp Plastic I mt water outflow 0 dense TC bit CS water sample Iiquiliit water inflow PU piezneeter HO very dense .3 e g AOl

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910 ALL 900 030 00 0[000JOV 011 AId sa3ual05005 Aa[J03 Coffey Geosciences Pty, Ltd ACN 056 335 516 borehole no: 1 I I BH2 engineering log - Sheet 4 of 5 borehole office iob no: AWL5409/1

client GRIFFITH CITY COUNCIL hole commeeced, 26/01/2000 principal: GRIFFITH CITY COUNCIL hole completed 25/01/2000 proect TfIA080GANG LAHLIFILL E.l S logged by: AE borehole location. REFER FIGURE 1 checked by:

drill model and mounting E050N 3000 slope: -90 PEG R.L.Surface. 148.540o

hole diameter: 90 bearing, datum:

oaEerial UT strUCture and OddltlOTdl oVsOFVatlons samples soil type plasticity or particle characteristics kPa UT tests. etc 'UT 'UT. ATDr colour, secondary and minor components - 1234 INTERBEDDED SILTSTONE 6 SANDSTONE: generally white H with bands of light brown

25 -

123

iT 30 -

L18

31 -

METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX AS auger screwingx Nil no support 4 jud U undisturbed sample (mm) SYMBOLS AND SOIL VS very soft 00 auger drill ingw C casing 0 disturbed sample DESCRIPTION S soft F firm PR roller/tricone PENETRATION Os bulk sample based on unit ied 1 2 3 'I environmental sample st stiff washbore little resistance classification system very stiff CT cable tool ranging to N standard penetration test: VSt hard HA hand auger ______very slow progress NI 5p1 + sample recovered MOISTURE ff Fb friable Dl diatube WATER Nc SPI with solid cone dry not measured 0 none observed AL very loose bit shown by suffix VS vane shear most water level L loose B blank bit PM pressuremeter W wet dyxamic penetroineter MD medium dense V V bit - UP p plastic limit water outflow 0 dense IC bit MS water sample WI liquid limit water inflow oi P2 pienometer HO very dense 0 a 0 asuap Ajao jaoiozatd id MOHuI JaPOM 100 H a(du!ps JO1PM 1Q 31 1 0 asuap p SN MGI 100 J0PM 1 I H asuap ujn'paa o JalawoJl0000 Jlw000p dO 1Q A A laA jue[q @soot 1 m Jal000JnsSuJd Nd oPal JaPM 10 0 15100 N jPOUS 000A xijjns Aq usa5s 1'Q 05001 AjOP 10 SO paujasqo OUOU C painspaw lou P p 0 aQ((1P(P a(QPIJ; 0] 000) 0(100 (IIIM IdS )N H11VA 10 Ja6n pu po PJPU II ]HflISI011 l(OJOGO)aJ adWPS + IdS xN ssaJboJd Mols AJ 1501 u0(PJ1aUad PJPPUPIS 01 6UOUPJ 1001 0100) 13 JJEJS Aja. 1S/I N ] WOISAS uoEIPJ(i(SSPIJ jPuauJuoJ(Aua 03501S(SOJ 01111 aJOQLlsPM H Ills 15 aidwos I P0(j1Ofl 00 P0500 a[dujos 11°C 50 NOIIVdI3N1d auo3(J1/JalIOJ HO 60(503 x6ur[[Jp ja6np pp 1105 S NOIIdIuas]a alduPs paqjnsp 0 3 000 lJ0000S 00 ['N 060IMOJJS jabne SV 1105 AJao SO lIDS ONV S109AS (aW) aidwes paQJnlS(pun 0 N XONl A1ISN]U/AlNISISNO3 N0I03HISSV13 II] 51511 S]ldVS IdOddflS UOH1]l UP

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W010p HutjoaQ - 0€ Jal000!pa[OU

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:ou aaajoq PlO SEC 950 N30 P11 Old Sa)UOMS009 AOl J03 Coffey Geosciences Ply. Ltd borehole no. ACN 058 335 516

I BH2 INX1 I

engineering log - sheet 6 of 5 hnrPhnlA nffirp inh nfl AWI kanT/i ho]e comoienced. 26/01I2000 client; GRIFFITH CITY C01JfIL Hale completed: 25/0I/2000 principal: GRIFFITH CITY C0IJfIL logged by AE project: Tl-I4080GANG LAIRJFILI E IS checked by: borehole location: REFER FIGURE I R.L.Surface: 148,649n dri]l model and mounting: EDSON 3000 slope: -go DEG bearIng ilatus: hole dianeter. 90

materaI structure and 2 . additional observations samPles. soil type:plasticity or particle characteristics . kPa .0 .0 tests. etc UT . colour, secondary and minor components - 1234 - - ; SANDSTONE: red, brown, sand fine to medium gra]ned.

41 -

PIEZOhfETER INSTALLED Borehole BR? Tereinated at 42.00 o PVC installed Slotted 30m - 42in Geoteotile Filter, Sex Fitted .05 495reTute to 25m Bentonite and Clay to Surface 43 - Steel Casing 0 Lockable Cap Installed I

46_

.02

4/ - -

tol

dv - CONSISTENCY/DENSITY INDEX B METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION undisturbed sample (oin) SYMBOLS AND SOIL VS very soft 2 AS auger screwingi Nil no support M mud U 5 soft AD auger drillingx C casing 0 disturbed suople DESCRIPTION F firm PR roller/tricone PENETRATION as Bulk sanple based on unified 1 2 3 4 E environmental sample St stiff N washbOre 1 little resistance classification system V5t very stiff U CT cable tool ranginu to N standard penetras on test ______very s ow progress y hard = VA hand auger Ni SPT + sample recovered MOISTURE with solid cone Fb friable O TI diatube WATER Nc SPI 0 dry not measured 0 none observed Vt very loose ibit shown by suffio VS vane shear M moist water level Pc pressuremeter loose U' B blank bit W wet dynamic penetroneter ND medium dense V V bit OP Np plastic limit water nutf low 0 dense H T TC bit WS water saoiple WI liguid limit water inflow VD very dense in e.g. ADT Pd piezometer

Coffey Geuscieeces Pty Ltd borehole no' ACN 056 335 516

BH3

engineering log - sheet 1 of 5 borehole hole commenced: 26/01/2000 client: GRIFFITH CITY C0U1L hole completed: 26/01/2000 principal: GRIFFITH CITY C0U!lL logged by: bE project: IHA080GANG LANDFILL E.l.S checked by: borehole location: REFER FIGURE 1 90 DEG P L.Surface: 131.436m drill model and mounting' EDSON 3000 slope. datum: hole diameter: 90 bearing,

materIal .5 'TiA struCture and additIonal observations samples 5 . soil type plasticity or particle characteristics 'TiA kPa tests. etc T 5. 105' colour, secondary and minor components 1234 - CH SILTY SANIJY CLAY: high plasticity, red, brown, sand M St residual fine to coarse grained.

31 ';

VSt/ H

.30

129

128

- - INTEPBEOOEO STLTSTONE SANDSTONE white with light 0 H Tevonian Segueoce brown bands. -

125

7-7 124

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION VS very soft AS auger screwingm Nil no support M mud U undisturbed sample (mm) SYMBOLS AND SOIL S soft 00 auger drillingx C casing 0 disturbed sample DESCRIPTION F firm OP roller/tricune PENETRATION Bs bulk sample based on unified environxental sample St stiff H washburn _L 2 little resistance C classificatien system VSt very stiff A CT cable tool ranging to N standard penetration test H hard HO hand auger ______very slow progress N 5PT w sample recovered MOISTURE Fb friable TT diatube WATER Sc SPT with solid cone d not measured 0 none observed VL very loose EDit shown by suffix x VS vane shear H most L lxxse B blank bit V7 water level PM pressuremeter w wet OP dynamic penetrometer MD medium dense V V bit P p astiC limit A water fl w 0 dense T TC bit ."*cl MS water sample WI liquid limit 5x.__water ieflew 00 very dense e.g OUT P0 piezOmeter Coffey Geosciences PLy. Ltd. rborehole no ACN 056 335 516

~FEW I I BH3

- engineering log sheet ? of 5 borehole office iob no AWl 5400/I

client: GRIFFITH CIlY COUfCIL hole commenced: 25/01/2000 princpa1 GRIFFITH CITY COUICIL hole completed: 25/01/2000 prolect: IHARBOGANG LAfFILL E.l.S logged by: HE borehole location. REFER FIGURE I checked by:

drill model and mounting: EDSON 3000 slope -90 DEG R.L.Surface: 131.438n

- bearing datum: hole diameter - 90

= materIal .b structure and AddItlOflAl observatIons samples 03 soil type plasticity or particle characteristics 3 kPa tests.etc . b3 03. 0303' colour, secondary and minor components

123 4 INTERBEDOED SILTSTONE C SANDSTONE: white with light y Devonian Sequence brown bands.

- 23

10 -

120

12 H

.18

METHOD SUPPORT SAMPLES. TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX very soft AS auger screwingi Nil no support H mud ii undisturbed sample (oni) SYMBOLS AND SOIL VS soft AD auger drilliogi C casing 0 disturbed sample DESCRIPTION S F firm PR roller/tricone PENETRATION Os bulk sample based on unified I 2 3 4 Eenvironmental sample St stiff washbore little resistance classification system very stiff CT cable tool ranging to N standard penetration test VSI very slow progress Nm + sample recovered If hard HA hand auger ______ SOT MOISTURE Fb friable O UT diatube WATER Nc SPT with solid cene D dr y not measured 0 none observed VL very loose 'bit shown by suffix VS vane shear H most water level L loose B blank bit V7 PM pressuremeter w wet MD medium dense V V bit -- OP dynamic penetrometer Hp p I astic limit Y water outfiuw water sample 0 dense TC bit -wS MS WI liquid limit water inflow very dense e.g. dOT 02 piezoineter VD Coffey Geosc,ences Pty. Ltd. ACN 056 335 516 [borehole no

~H IM I BH3

engineering log - I sheet 3 of 5 borehole office lob no: AWL6409/1

client: GRIFFITH CItY COIJhCIL hole commenced: 26/01/2000 principal: GRIFFITH CITY COUfIL hole completed: 26/01/2000 proiect: IHA000GANG LAfITFILL E.I.S logged by: AE borehole location: REFER FIGURE 1 checked by:

drill model and mounting: EPSON 3000 slope: 90 PEG R.L.Surface: 131.4361 hole diameter. 90 seariog: datum:

= matertal .E PT 13 to structure and PT samples addi tl01 observations PT . so]l type plasticity or particle characteristics kP T. tests. etc - PT PT. colour, secondary and minor components

123 4 INTERBEDDED SILTSTONE SANDSTONE: white with light D H Devooiao Sequence brown bands.

.14

1.13

i2 •-

-4

110

22 SANDSTONE: moderately to high weathored dark red, H brown, sand fine to coarse grained.

23 INTERBEDDED SILTSTDNE SANDSTONE: white with light 0 brown bands

METHOD SUPPORT SAMPLES. TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX As auger screwinge Nil no support M mud Ii undisturbed sample (mm) SYMBOLS AND SOIL vs very soft HO auger drillingx C casing 0 disturbed sanple DESCRIPTION S soft F firm 7 PR roller/tricone PENETRATION Os bulk sample based on unified I 2 3 4 environmental sample St sliff washbore little resistance E classification sysiem CT cable tool ranging to N standard penetration test VSt very stiff very slow progress H hard HA hand auger ______Nx SPY sanple recovered MOISTURE Fb friable 01 diatube WATER Nc SPY with solid cone o dr nut measured P none observed VL very loose ebit shown by suffix VS vane shear mist Nvwater level L loose B blank bit PM pressurenieter w wet dynamic penetrometer MD medium dense A V bit OP Wp plastic limit water outflow 0 dense T TC bit MS water sample WI liquid limit - water inflow e.g. AD! P2 piezometer VP very dense Cot fey Geosciences Pty Ltd borehole no ACM 056 335 516

BH3 engineering log - J sheet 4 of 5 borehole off ire inh en: AWl 6409/1

client: GRIFFITH CITY COIfrCIL hole commenced 26/01/2000 principal: GRIFFITH CIIY COUhCIL hole coiplete 26/01/2000 project: THARBOGANG LAMOFILL E.I.S logged by: AC borehole location. REFER FIGURE I checked by: R.L.Surface: 131.435n drill model and counting: EPSON 3000 slope -90 PEG

hole diameter. 90 bearing, datum: = material structure and additoonal observations samples .Z soil type plasticity or particle characteristics . kPd tests.etc - ti . iO' colour. secondary and minor components 1234 INTERBEDOED SILTSTONE C SANDSTONE: white with light brown bands

.0/

25 -

bOb

1.03

29 H

LOP

31 -

DO SANTSTQNE' hiyhly weathered and silty clay bands A MO red, brown. white. 5and fine to coarse grained. - -- - METHOD SUPPORT SAMPLES. TESTS. ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX VS very soft AS auger screwingx Nil no support A mud U undisturbed sample (mm) SYMBOLS AND SOIL S soft AD auger drillinge C casing 0 disturbed sample DESCRIPTION F firm PT roller/tricone PENETRATION Os bulk sample based on unified I 2 St stiff A washbore _ilittle resistance environmental sample classification system VSf very stiff CT cable tool r ranging to N standard penetration test very slow progress H hard HA hand auger I______f4 5PT sample recuvered MOISTURE Fb friable 01 diatube WATER Nc SPT with solid cone 0 dry y not measured 0 cone observed Vt very loose Xbit shown by suffix ys vane shear mst Nv water level L loose B blank bit PM pressuremeter A wet MO medium dense V V bit OP dynamic penetrometer Ap plastic limit ...z water outf low dense I IC bit AS water sample WI liguid limit water inflow VP very dense 3 e g 601 17' Pi piezometer

Coffey Geosciences Pty, Ltd borehole no. ACN 056 335 516 iIEff7 I BH3

engineering log - v/YZ7/7A] sheet 5 of 5

hnrhole nftirp inn nfl AWl h40T/1

client: GRIFFITH CITY CDUPIL hole commenced: 26/01/2000 principal: GRIFFITH CIIY C0UlL hole completed. 26/01/2000 logged by: bE prolect: THARODGANG LAN3FILL LI borehole location: REFER FIGURE 1 checked by:

drill model and mounting: EPSON 3000 slope: -00 DEG R.L.Surface: 131.436m

hole diameter: 90 bearing: datum:

C - oalerial .Lz structure and additional observations samPles 03 03 soil type plasticity or particle characteristics kPa secondary and minor components 0303 03 tests.etc 03 SlOp colour, 1234 SANDSTONE: highly weathered and silty clay bands MD red, brown, white. saod fine to coarse grained.

- -- 95 BoreoIe OH] Terolnated at 35.50

35 - PIEZOHETEIT INSTALLED - PVC installed Slotted 24m - 35.5m 95 Gententile Filtor Son Fitted Aggregate to 20m Bentonite and Clay to Surface Steel Casing 0 Lockable Cap 37 - Installed

METHOD SUPPORT SAMPLES. TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX very soft AS auger screwingx Nil no support N mud U undisturbed sample InmI SYMBOLS AND SOIL vs S salt AD auger driIling C casing P disturbed sample DESCRIPTION F firm PP roller/tricone PENETRATION Os bulk sample based on unified 2 _ E environmental sample St stilf N was550re 4 -1_Iittln resistance classification system VSt very stiff CT cable tool ranging to N standard penetration test. H hard HA hand auger ______very slow progress Nx SPT + sample recovered MOISTURE of with Solid cone Fb friable diatube WATER Nc SPT 3 dr not measured 0 none observed VL very loose xbit shown by suffix x VS vane shear N most water level PM prensuremeter L loose 5 8 blank bit w wet ND mediom dense V V bit OP dynamic penetrometer Wp plastic limit water outf low 0 denSe T IC bit MS water sample wi liquid limit waterinflow VO very dense g _oj jTrv— P2piezometer Coffey Geosciences Ply Ltd. Oorehele no ACM 056 335 516 IIF? BH4 I I i I

engineering log - V/7/J/J7A sheet I of 5 hnrhn1e nffirP job no AWl 6409/f hole commenced: 27/01/2000 client: GRIFFITH CITY COIJICIL hole completed: 21/01/2000 principal: GRIFFITH CIIY CDUf1L logged by: AE project: THAR800AND LANDFILL E.1.S checked by: borehole Iocatjon: REFER FIGURE I -90 DEG P L.Surface: 126.33be drill model and mounting: E0SON 3000 slope datum. hole diameter: - 90 - bearing.

—Pd to oaterial 'i Pd S structure and additional observations samples S 03 soil type plasticity or particle characteristics . kPa Pd Pd tests.etc Pd Pd Pd. 03Pd' colour, secondary and minor conponents - 1234 Cff SILTY SANDY CLAY: medium to high plasticity, red, H S / residual VAt . brown, sand fine 10 coarse grained, 25 .

INIERBEDDEO SILISTONE C SANDSTONE: white, light 0 H Devonian Sequence grey, brown, some bands of red, brown, sandstone and 25 sandy clay.

122

SANDSTONE: moderately to high weathered light brown. MO red, brown.

120

SILTSIONE: SANDSTONE: moderately to highly weathered 11 MO / H - light brown, red, brown. 19

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION vs very tof AS auger screwingi Nil no support H mud U undisturOed sample (oe) SYMBOLS AND SOIL S soft 00 auger drillingi C casing 0 disturbed sample DESCRIPTION fire PR roller/tricone PENETRATION as Oulk sample based on uni! md 3 4 envirenmeetal sample St stiff H washbore little resistance E classification system VSt very stiff CT cable tool ranging to N standard penetration test: ______very slow progress H bard MA hand auger Ni SPI + sample recovered MOISTURE Fb friable OT diatube WATER NC SPT with solid cone o Xnot measured 0 none observed VL very loose ibit shown by Suffix VS vane shear most L loose B blank bit Nvwater level PH pressuremeler H wet MD medium dense V V bit -'c— OP dynamic penetrometer WP plastic limit water outflow 0 dense U IC bit MS water sample WI liquid limit water inflow VO very dense Aol ETP.— P2 piezoimeter Coffey GeoSciences Pty Ltd borehole no ACN 056 335 516 Lftft7 I I

engineering log - [vzz7zi sheet 2 of 5 borehole office lob no: AWL640911 hole commenced: client: GRIFFITH CITY C0Uf1L 27/01/2000 principal GRIFFITH CiTY COUF(IL hole completed 21/01/2000 logged by: AE prolect. IHAITBOI3AM3 LAfIJFILL El.S horehole location: REFER FIGURE 1 checked by:

drill model and mounting. EPSON 3000 slope: -90 DCC R.L.Surface 126 33hi

hole diaoeter: 90 bearieg: datum: .1 - oaLerial StruCture and OddItlOflUl DAservatlons samples soil type plasticity or particle characteristics kPa T. tests.etc d Pd Gd Pd ttI' colour. secondary and minor cooponents

1214 SILTSTONE: SANDSTONE: moderately to highly weathered H a light brown, red, brown.

.31

115

15 -

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.33

14 SILISTONE: SANDSTONE: light brown, white. H

.32

SILTSTONE SANDSTONE: light brown, white, sand line H to coarse grained.

CONSISTENCY/DENSITY INDEX METHOD SUPPORT SAMPLES, TESTS. EEC CLASSIFICATION vS very soft AS auger screwingi Nil no support H mud U undisturbed sample mel SYMBOLS AND SOIL S soft AD auger drillingo C casing 0 disturbed sample DESCRIPTION F firm PR roller/tricone PENETRATION Os bulk sample based on unified I 2 ' eovireemeotal sample St still washbOre liltie resistance E classification system VSt very stiff CT cable tool ranging to N standard penetration test: eery slow progre5s MOISTURE Hhard 5 Ha hand auger I Nx SPI sample recovered Fb friable TI diatube WATER Nc SPT with solid cone P dry nut measured 0 none observed Vt very loose bit shown by suffix p vs vane shear eost water level F loose B blank bit PM pressuremeter W wet HO medium dense V V bit OP dyeamic penetrometer WP plastic limit .. water outflow 0 dense .3 T IC bit MS water sample isit water inflow VP very dense 73 e g. AD EEIw'- Pd pieiOmeter 6a Usuop AJoo GA j01 ao010(d Od MOIEUI JPN01 icy uij pno EM 05000 0 aldulos JU1PM SM M0[flfl0 JO1PH - 1 Itoll J(lSPId dA 05000 WPRW j01000J1000d J(WPUAP dO 110 A A laM N OUPEO asoci 1 jalaajnSsaJd Nd 10001 J81OM 1(0 10(00 N JP019 0000 X(flfls All JMOQS 1!QX 05001 Ajao lÀ SR paUJOSQO OUOU 0 painseaw lOU x Ajp 0 aqnotp a[QP(Jl (11 aUOD ptIos U1(M IRS 30 ______H11VA 10 .ja6np pUPQ pJPU H ]dnIsIoN POJ00030J adopS + IdS N ssaJ6oJd Mo S Ajc1-11 m U6UPJ 1001 01003 lI15 Ajao ISA 1031 uotlPjlauad PJPPUP1S N 01 13 walsAs uo(IPJ[E(ssPlJ UUJ(AUa aJUPlS(SOJ 3111(1 H liEs IS aldooS 1010 3 Pc [ pJiiiUfl 00 00501 aUOJiJl/JUIEOJ Will I UEN005 Ifl0 so N0I1Vd1]N]d All 6so 6ai([iJp J3600 Ilos S NOJIdIHGS]O a[duJPs paQJfllSip 0 00 pflM N ijodAns OU (N XOUi+RJJS Ja0nP 50 1105 AJOA SA 1105 QNV S1096S (ow) a[d005 000JUES1PUS P X]ONI AIISN30!0N]ISISN03 N0I031iISSV13 J13 SIS11 S1dNVS IBOddflS OOHJJW

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client: GRIFFITH CuT C0UfIL hole commenced: 21/01/2000 principal: GRIFFITH CITY COUMIL Cafe completed: 21/0112000 project THA08060NG LANGFILL [ 1.5 lagged by: 66 borehole location: REFER FIGURE 1 checked by:

drill nodel and mounting: EDSON 3000 slope: -90 DFG R.L.Surface: 126 33bi

hole diameter: 90 bearing datum:

saterlal structure and aitional observatjons samPles. E 2 .: so]l type: plasticity or particle characteristics kPa tests,etc coleur, secendary and minor components

1234 SILTSTONE. SANDSTONE. light brown, white, sand fine - to coarse grained, 64

93 -

34i

SANDSTONE: some clayny sand low plusticity, light H ff3 trOwn, sand fine to coarse grained, F 35 -

SC ELAtES SAND. low plasticity, yellow, brown, sand V L a]luv:un fine to coarse grained.

31 -

000 OP GRAVEL. brown, coarse 40/

00 0 - 0 PIEZOMETER INSTALLED - 00 PVC installed 0 Slotted 26m - 38.5m BO 0 0 0 Geotextile Filter Sox Fitted Aggregate to 25m Borehole BH4 Teroinated at 38.50 o Bentonite and Clay to Surface Steel Casing 6 Lockable Cap - Installed -

40 - INDEX METHOD SUPPORT SAMPLES, TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY VS very soft VS auger screwinqi Nil no support H mud U undisturbed sample (me) SYMBOLS AND SOIl soft AU auger drilfingi C casing 3 disturbed sample DESCRIPTION S F firm PR ruller/Iricone PENETRATION ITS bulk sanple based on unified I 2 3 4 environoental sample St stiff H washburn I ttle resistance F classification system YSt very stiff CT cable tool I ___ranginu to N standard penelration test: very slow progress hard HA hand auger I Nw SPT e sample recovered MOISTURE H No with solid cone Fb friable 01 diatube WATER SPI U dry not measured 0 none observed VL very loose ibit shown by suf I in x VS vane shear H moist water level L loose B blank bit \I7 PH pressuremeter W wet dynamic penetroceter MO medium dense V V bit OP Wp plastic limit water outf low water sample dense 1 IC bit WS WI liguid limit water inf few very dense AD! Pdpiezometer VU ba asuao Ajas GA jaaoozatd ld MCI Jul JJCM ION iiIPfl'ib IN J(Q asuao 0 alduMu JOJCM SM 31 1 Iml 311selo N asuap wnipaw ON jaaoojiauad JIWMuAp dO hA A A jam N Jtq asooj 1 JalawaJnSSaJd Wd aa J12M L1\ NuelA o 1S0a N XtJflS Aq ueatJs ]iQ aSaoi AAA lÀ J2aS OUNA SA paujasqu auou a paJns000 Jou 0 Ajo aqelJJ qj a auOJ PICS AiIM idS DN H11VA OQO1CIP 10 JabflC PUCIJ NH PICA a ]dfllSIOH paaaeoJaJ aldoes hIS KN sjbid eus AJAC oi 6uIbuCJ______O[QCD iris AJaA iSA iSaI ualiejlauad JCUPS w 1001 13 IaiSAS uotipJtJtSSeiJ aJueistsa aJOQ5SPM N aldoes iauawuOJ!ua £ paljun U0 PASPQ will aldwes AIflA SO NOIlVdI]N]d auuJiJi/JauoJ Ud butsej i mbuittlip jabue cv 110 5 S N0I1dIOS30 aldoes paqJnistp 0 Pnw xbulMaJJs jabne os Ajac SO 110 ONY S1O9AS (°) adoes paqjnisrpun n N IJOAOS Cu IN SY X]ONI A11SN]U/AN]1SJSNO3 N0IIVJIiISSV1J JH SIS]1 'S]ldOVS 1Oddfl9 OOHI]W A - -

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Coffey Geo5cience5 Pty. Ltd. ACH 056 335 516 borehole no

BH5 engineering log - VL17/7L71 sheet 2 of 2 _ H borehole of f ice job no: AWL6400/1

client: GRIFFITH CITY COUPCIL hole commenced: 28/01/2000 principal: GRIFFITH CITY CDIJICII, hole completed: 28/01/2000 prolect: THARSOGANG LAfITFILL E.l.S logged by: HE borehole location: REFER FIGURE 1 checked by:

drill model and counting: E000N 3000 slope -90 DEG R.L.Surface: 125.90bm

hole dianeter' 90 bearing, datum.

= materIal 03 struCture and adtiona] observations '03 iS samples E 03 -.03 soil type plasticity or particle characteristics 2i kPa 03 ' T. tests.etc ' '03. 03 colour, secondary and minor components 0303

1234 INTERBEDOEO SILTSTDNE 6 SANDSTONE: highly weathered, MO Devonian Sequence white, light brown.

SP SAND wl itO, L alluvium

135 11

14 12 -

U? 14 -

— — — , drilling banner lambed in loose sands Hole Abandoovd 1-il 15 - -

liT ¶0 METHOD SUPPORT SAMPLES, TESTS. ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX AS auger screwingx Nil no support H mud U undistorbed sample (mm) SYMBOLS AND SOIL OS very soft 00 auger drilliogw C casing 0 disturbed sample DESCRIPTION S soft F firm PR roller/tricone PENETRATION So Sulk sample based on unified I 2 3 4 St stiff H washbore little resistance E environmental sample classification system CT cable tool ranging to N standard penetration test. VSt very stiff HA hand aoger ______Very slew progress Nx SPT a sample recovered MOISTURE H hard Fb friable 01 diatube WATER NC SPI with solid cone dry not measured 0 none observed ebit shown by suffix x VS vane shear VL very loose water level loose B blank bit V7 PH pressuremeter If wet L dynamic peoetrometer ff0 medium dense V V bit OP WP plastic water outflow WS water sample 0 dense IC bit _.3 WI liquid limit water in low e.g. 601 On— PI piezoeeter PD very dense I Coffey Geosciences Ply Ltd ACN 056 335 515 borehole no: NEW I I BH5A engineering log - beet I of 2 borehole office iob no: AWL6409/1

client: GRIFFITH CITY COU1IL hole commenced: 29/01/2000 principal: GRIFFITH CITY COUNDIL bole completed: 29/01/2000 prefect: THA080GANG LANDFILL E I.S logged by: HE borehole location: REFER FIGURE I checked by:

drill model and mounting: EOSON 3000 slope -90 DEC 0.L Surface: 125.901m bole diameter: 90 bearing datum:

= oaterial 5 -90 struCture and addItIonal observations I samPle5 .90 soil type plasticity or particle characteristics kP tests. etc -Pd 90. 90Pd' colour, secondary and minor components

1234 o CL SILTY SANDY CLAY: medium plasticity, red, brown. A St colluvium sand line to coarse grained.

SANDSTONE: moderately to highly weathered light 0 MO Devonian Snquence grey, brown. I 25 I 124 I SANDSTONE: moderately weathered, white 0 I 123 H

I 12? I I

U 20 I 119 I

I SAMPLES. TESTS. ETC CLASSIFICATION CONSISTENCY/DENSITY INDEX METHOD SUPPORT AS auger screwinge Nil no support A mud U undisturbed sample mm) SYMBOLS AND SOIL VS very soft AO auger drillinge C casing 0 disturbed sample DESCRIPTION 5 soft F firm OfT reller/Iricone PENETRATION Os bulk sample based on unified I 2 3 ' environmental sample St stiff wassbnre little resistance F classification system CT cable tool ranging to N standard penetration test VSL very stiff HA band auger ______very slow progress N SPT sample recovered MOISTURE it hard Fb friable UT diatube WATER NC SPT with solid cnne dr g not measured 0 none observed VL very loose ebit shown by suffix VS wane shear H nust Nv water level L tense B blank bit PM pressuremeter w wet dynamic penetrooeter MD medium dense O V bit OP WP plastic I mt water outf low 0 dense IC bit ws water sample WI liquid limit water inflow very dense e.g. HOT ETow.— P Z piezoineter vo U Coffey Geosciences PLy Ltd ACN 056 335 516 borehole no 1 BH5A I I engineering log - VLIL7L7A sheet 2 of 2 borehole nifirm inh nn Awl fj4flj/f

client: GRIFFITH CITY C0JI4IL hole commenced: 29/01/2000 principal: GRIFFITH CIIY COUICIL hole completed 29/01/2000 project: IRAR300AI4G LAN9FILL [.1 S logged by: AE borehole location: REFER FIGURE I checked by:

drill model and meafltin EDSON 3000 slope: -90 DEG RESurface: 125 90An

hole diameter 90 bearing: datum:

2 oaterial .5z struCture and additional observations samples Ud soil type plasticity or particle characteristics kPa tests. etc st st. stOP colour, secondary and minor components

1234 SANDSTONE: moderately weathered, while 0

.11

15 10

SH SILTY SAND vfnite. fine grained H L a]luviuo

-J 114 —__12

- Sand caved in and janbed year as per Sf15 1 f_I 3 13 - PIE/OHETER INSTALLED PVC installed Slotted to Sm - 12.5m Geoteotile Filter Son Fitted Aggregate to 5m Bentonite and Clay to Surface

12 Steel Casing 6 Lockable Cap 14 - Installed -

15_

.10 INDEX METHOD SUPPORT SAMPLES. TESTS, ETC CLASSIFICATION CONSISTENCY/DENSITY VS very soft AS auger screwingx Nil SO Support H mud U undinturSed sample me) SYMBOLS AND SOIL AD auger drillingi C casing 0 disturbed sample DESCRIPTION S suIt F firm PR roller/tricone PENETRATION Os Sulk sample Uased on unified 3 4 environmental sample St 511ff washbore _!2 little resistance F classification system very stiff CT cable tool ranging to N standard penetration test PSI lard HA band auger ______very slow progress Ni SPT + sample recovered MOISTURE H Fb friable OT diatube WATER Nc SPI with solid cone o cry not measured 0 none observed VL very loose bit shown by suffix x VS vane Shear M mst water level C loose B blank bit P4 pressuremeter W wet MO medium dense V bit OP dynamic peeetrometer Wp last c I mt water outlluw 0 dense TC bit -1 AS water sample A] liquid lirnit water inflow very dense e.g AD! PU piezoeeter VS 1i\

'L HIRROO T 110 AREA _ 44 w 4RB LJ (N\\\ 213 ,,,/_..([LANDFILL_k\ j OQd SITE \ ) r21 \ 69 21 694 [L 1/ :' • fonyalc-

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115 c 1/ cc ffl OQd )\cr'b

Coffey Geosciences Pty LtdKN 056 335 516 Geotechnical I Resources I Environmental I Technical I Project Management

Drawn TRK GRIFFITH CITY COUNCIL 2000m HYDROGEOLOGICAL ASSESSMENT Approved THARBOGANG LANDFILL FIGURE 1 Date 17/5/2000

Scale LOCATION OF LANDFILL Job no AWL6409/1 I L. I i 7 I 0 I I 2

z,J_LL. I

CMMIRsherStewin 1;;;;:;i:TT LTD 2099190/1

BHI Denotes approximate location and number of investigation borehole

Coffey GOOSC..tOZ PtyL_td AOO56335516 GeOtecliflical I Resources I Environmental I TecIcaI I Project Management Drawn MH DcswlN5 o: I GRIFFITH CITY COUNCIL ApprnveO AE THARBOGANG LANDFILL FIGURE 2 Date 09/06/2000 GROUNDWATER ASSESSMENT AND CONTAMINATIJN Scale N.T.S REMEDIATION PLAN Job 7o AWL6409/1-BG —4— Ground surface level (AHD) —ti}-- Groundwater level (AHD)

160

150

140

120

110

100 BH1 BH2 BH3 BH4

Monitoring Bore

Coffey Geosciences Pty Ltd ACN osn as 516 Geotechnical I Resources I Environmental I Technical I Project Management GRIFFITH CITY COUNCIL Drawing no: Drawn TRH HYDROGEOLOGICAL ASSESSMENT Approved THARBOGANG LANDFILL FIGURE 3 Date 17/5/2000

Scale CROSS-SECTION A-A' Job no AWL6409/1 AWL6409/1 -BG 19 May 2000

AP PE N DIX A

LABORATORY REPORTS RIVERINA LABORATORIES

95 Urana Road, Jindera P.O. Box 59, Jindera NSW 2642 (02) 6026 3666 - Telephone A Fax (02) 6026 3696

Chemical Testing and Consultation for Agriculture. Industry and Environment

LABORATORY REPORT PAGE No ------REPORT No. :00/067 DATE: 14/2/00

CLIENT: Coffey Geoscierices P/L P.O Box 803 Aibury 2640 - 0102 to 0105 ORDER No. / REFERENCE: AWL 6409/1 / SAMPLE DESCRIPTION: 4 Bore Waters

DATE RECEIVED: 1/2/00

METHOD: APHA 17th. EDIT.

RESULTS FOR 0102 to 0105 0103 0104 0105 TEST 0102 7.2 6.5 8.7 7.0 pH 660 5,960 3,980 uS/cm 4,140 E.C. 458 4,136 2,464 TDS mg/i 2,902 3.2 1.5 3.2 1.9 DO mg/i 99 559 523 Bicarbonate mg/i 410 11.2 2.8 2.6 TKN mg/i 2.8 <0.1 <0.1 <0.1 <0.1 Ammonia mg/i 50 5 30 Nitrate N mg/i 25 377 373 335 305 COD mg/i 76 440 36 TOC mg/i 41 0.6 1.0 0.8 Phenols mg/i 0.5

0102 - Water 200076 BH1 0103 - Water 200077 BH2 0104 - Water 200078 BH3 0105 - Water 200079 BH4

e;' /?/OO CHEMIST FORWARDING RESULTS DATE

/'r / - /00 MANAGER PAUL WAREHAM BSC. SYDNEY UNI. DATE RIVERINA LABORATORIES

95 Urana Road, Jindera P.O. Box 59, Jndera NSW 2642 c- Telephone (02) 6026 3666 Fax (02) 6026 3696

Chemical Testing and Consultation for Agriculture, Industry and Environment

LABORATORY REPORT PAGE No ------REPORT No. :00/070 DATE: 10/2/00

CLIENT: Coffey Partners 151 Wytarra Drive Nth.Albury 2641 ORDER No. / REFERENCE:AWL 6409/1 / 0102 to 0105

SAMPLE DESCRIPTION: 0102 - Water 200076 0103 - Water 200077 0104 - Water 200078 0104 - Water 200079 DATE RECEIVED: 1/2/00

METHOD: RL 88/10/-

RESULTS FOR SAMPLE No. 0102 to 0105

ORGANOCHLORINE RESIDUE ug/1 0102 0103 0104 0105

BHC <0.1 <0.1 <0.1 <0.1 HCB <0.1 <0.1 <0.1 <0.1 /1 BHC <0.1 <0.1 <0.1 <0.1 LINDANE <0.1 <0.1 <0.1 <0.1 HEPTACHLOR EPDXIDE <0.1 <0.1 <0.1 <0.1 DDE <0.1 <0.1 <0.1 <0.1 DIELDRIN <0.1 <0.1 <0.1 <0.1 DDD <0.1 <0.1 <0.1 <0.1 DDT <0.1 <0.1 <0.1 <0.1 TOTAL DDT <0.1 <0.1 <0.1 <0.1 HEPTACHLOR <0.1 <0.1 <0.1 <0.1 ALDRIN <0.1 <0.1 <0.1 <0.1 OXYCHLORDANE <0.1 <0.1 <0.1 <0.1 ENDRIN <0.1 <0.1 <0.1 <0.1

Samples contain no OC Pesticides.

CHEMIST FORWARDING RESULTS DATE /S /?/00

MANAGER - PAUL WAREHAK BSC. SYD.UNI. DATE "" RIVERINA LABORATORIES

95 Urana Road, Jindera P.O. Box 59. Jindera NSW 2642 Telephone (02) 6026 3666 __ -• i Fax (02) 6026 3696

Chemical Testing and Consultation for Agriculture. Industry and Environment

LABORATORY REPORT PAGE No ------REPORT No. :00/069 DATE: 10/2/00

CLIENT: Coffey GeoscienceS P/L P0 Box 803 Albury 2640 0105 ORDER No. / REFERENCE:AWL 6409/1 / 0102 to Water 200077 SAMPLE DESCRIPTION: 0102 - Water 200076 0103 - 0104 - Water 200078 0105 - Water 200079 DATE RECEIVED: 1/2/00

METHOD: RL 88/10/-(A)

RESULTS FOR 0102 to 0105

Organophosphate 0103 0104 0105 Residue ug/1 0102 ------<0.1 <0.1 Fenitrothion <0.1 <0.1 <0.1 <0.1 ChiorpyrifoS <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Chiorpyrifos-MethYl <0.1 <0.1 <0.1 <0.1 Pyriifos Methyl <0.1 <0.1 Diazinon <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Broinophos Ethyl <0.1 <0.1 Ethion <0.1 <0.1

No OP Pesticides detected in these sanp1es.

/' /Z./00 CHEMIST FORWARDING RESULTS DATE

/ i4 / z /00 MANAGER PAUL WAREHAM BSC. SYDNEY UNI. DATE 6026 3696 RIERIHii LABS. 01 25'03 '00 09:55 2 02

RIVERNA LABORATORIES

95 Ucro (ood. Jirdero P.O. Box 59. Jindero NSW 2642 TeIephone (02) 6026 3666 fox (02) 6026 36?O

Chemical Testing and Consultation for Agriculture, Industry and Environrner?t

LABORATORY REPORT PAGE No ------REPORT No. :00/139 DATE: 25/3/00

CLIENT: Coffey Geosciences P/L P0 Box 603 A1buri 1SW 2640 ORDER No. / REFERENCE: AWL 6408/1 / 0244 to 0247 Water 200196 SAMPLE DESCRIPTION: 0244 - Water 200195 0245 - 0246 - Water 200197 0247 - Water 200196 DATE RECEIVED: 5/3/00 Methods.. METP0D: Aus. Lab {andbook of Soil & Water Chetn. & APHA 17th Edit. RESULTS FOR 0244 to 0247

0246 0247 Tests 0244 0245 55 108 BOO g/2 54 60 5452 460 3,778 2,572 TOS g/l 0.2 0.4 Total P mg/i 0.5 0.5 1.3 Aluminium mg/i <0.1 <0.01 <0.01 <0.01 Arsenic mg/i <0.1 <0.1 Bariummg/1 <0.1 <0.1 0.00:3 0.009 0.009 Cadivai ing/l 0.013 0.08 <0.01 0.06 0.06 Cobalt mg/i 0.04 0.04 0.09 Copper mg/i 0.04 0.16 0.19 cLOG Lead Mg1I 0.15 0.0002 0.0002 <0.0002 <0.0002 Mercury mg/i 0.53 0.07 0.60 Zinc m912 0.47 <0.01 <0.01 <0.01

p 25 /00 CHEMIST FORWARDING RESULTS DATE /

/ /00 MANAGER PAUL WAREHAH BSC. SYDNEY .iNI. DATE >'/3

25/03 '00 09:58 TX/RX NO.3818 P.001 6026 3696 RIUERI0 LITIES. 05 25103 1 00 09:59 02

RIVERINA LABORATORIES

95 Urona 1oad, Jindero P.O. Box 59. Jndecx NSW 2642 Telephone (02) 6026 3666 Fax (02) 6026 3696

Chemical Testing and Consultation for Agriculture, lndust' and Environment

LABORATORY REPORT PAGE No ------REPORT No. :00/143 I 23/3/00 CLIENT: Coffey Geosciences P/L P0 Box 803 I Albury 2640 ORDER No. / REFERENCE:AWL 6409/1 / 0244 to 0247 SAMPLE DESCRIPTION: 0244 - Water 200195 0245 - Water 200196 0246 - Water 200197 0247 - Water 200198 DATE RECEIVED: 8/3/00

METHOD: FL 88/10/-(A)

RESULTS FOR 0244 to 0247 I Orgariophosphate Residue ug/1 0244 0245 0246 0247 ------

Fenitrothion <0.1 <0.1 <0.1 <0.1 Chlorpyrifos <0.1 <0.1 <0.1 <0.1 • Chiorpyrifos-Methyl <0.1 <0.1 <0.1 <0. 1 I Pyriinifos Methyl <0.1 <0.1 <0.1 <0. 1 Diazirion <0.1 <0.1 <0.1 <0. 1 Bromophos Ethyl <0.1 <0.1 <0.1 <0. 1 I Ethion 0.1 <0.1 <0.1 <0.1 I No OF Pesticides detected in these samples. I I

I CHEMIST FORWARDING RESULTS DATE J /7 /00

I MANAGER PAUL WAREHAM BSC. SYDNEY UN1. DATE j /3 /00 I

I 25/03 '00 09:58 TX/RX NO.3818 p.005 25/03 '00 09:56 2 02 6026 3696 RIVERINO LBS. 02

RVERSNA LABORATORIES

95 Urano Pood. Jindera P.O. Box 59. Jindera NSW 2642 letophofle (02) 6026 3666 A Fax (02)60263606

I Chemical Testing and Consultation for Agriculture. Industry and Environment I

LABORATORY REPORT PAGE No ------REPORT No. :00/140 DATE: 21/3/00 I CLIENT: Coffey Geosciences P/L PD Box 803 I Albury NSW ORDER No. / REFERENCE: AWL 6409/1 / 0244 to 0247 SAWLE DESCR1PTIO: 0244 - Water 200195 0245 Water 200196 0246 - Water 200197 0247 - Water 200198 DATE RECEIVED: 8/3/00

METHOD: Gas Chromatography

RESULTS FOR 0244 to 0247 0245 0246 0247 I Tests tug/I 0244 Hydrocarbons C6-C9 0.7 0.9 1.3 1.0

I Hydrocarbons C1O-C14 <0.1 <0.1 <0.1 <0.1

Hydrocarbons C15-C28 <0.2 <0.2 <0.2 <0.2 <0.2 I Hydrocarbons C29-C36 <0.2 <0.2 <0.2 I

117 CHEMIST FORWARDING RESULTS DATE ii /1/00

MANAGER PAUL WAREHAM BSC. SYDNEY UH1. DATE ?1 /3/00

25/03 1 00 09:58 TX/RX NO.3818 P.002 25'03 00 09:57 X 02 6026 3696 RILIERIHO LOBS. 03 I RIVERINA LABORATORIES

I 95 Urana Rood. Jindero P0. Box 59. Jindera NSW 2642 ToIoprone (02) 6026 3666 _- I Fax (02) 6026 3696

Chemical Testing and Consultation tor Agriculture. Industry and Environment I j

LABORATORY REPORT PAGE No ------REPORT No. :00/141 DATE: 21/3/00 I CLIENT: Coffey Geosciences P/L PD Box 803 Albury NSI 2640 IORDER No. / REFERENCE: AWL 6409/1 / 0247 SAMPLE DESCRIPTION: 0244 - Water 200195 0245 - Water 200196 I 0246 - Water 200197 0247 - Water 200198 DATE RECEIVED: 8/3/00

METHOD: Gas Chromatography

RESULTS FOR 0244 to 0247 Tests ug/1 0240 0245 0246 0247

Benzene <0.5 O.5

I Toluene <0.5 <0.5 <0.5 <0.5 Ethyl Benzene <0.5 <0.5 <0.5 <0.5

I Xylenes ,s1.5 <1.5 <1.5 <1.5

CHEMIST FORWARDING RESULTS DATE ?i /3/00

IMANAGER PAUL WAREHM1 BSC. SYDNEY (JUl. DATE f /3/00

I 25/03 '00 09:58 TX/RX NO.3818 p.003 25'03 1 00 1 0:PIO M 02 6026 3696 RIUEP1HQ LES. 07

RIVERINA LABORATORIES

95 Urano 1?oacl. Jindera P.O. Box 59. Jndora NSW 2642 .. Teiephono (02) 6026 3666 . Fax (02) 6026 3696

Chemical Testing and Consultation for Agriculture. Industry and Environment --. -- -

LABORATORY REPORT PAGE No ------REPORT No. :00/145 DATE: 23/3/00

CLIENT: Coffey Geosciences P/L PU Box 803 Albury NSW 2640 I ORDER No. / REFERENCE: AWL 6409/1 / 0244 to 0247 SAtI.PLE DESCRIPTLON 02.44 - Water 200185 0245 - Water 200196 I 0246 - Water 200197 0247 - Water 200198 DATE RECEIVED: 8/3/00 tETHOD: Gas Chromatography RESULTS FOR 0244 to 0247

I Hydrocarbons ug/1 0244 0245 0246 0247

Chlorof'orm <0.5 <0.5 <0.5 0.5 ' 1,1,1-Triehloroethane <0.5 <05 <0_S Carbon Tetrachioride <0.5 60.5 <0.5

Trichioroethene <0.5 <0.5 <0.5 <0.5 I Broodhlooiethane <0.5 <0.5 <.0.5 <0.5 Dibroiooh1oroinethane <0.5

CHEMIST FORWARDING RESULTS DATE 23 /3 /00

I MANAGER "-PAUL WAREHAM BSC. SYDNEY UHI. DATE 23 /J' /00 I

I 25/03 '00 09:58 TX/RX NO.3818 P.007 RIVERIHP LOOS. 04 25'03 00 09:58 2 02 6026 3696

RIVERIt4A LABORATORES

95 Uroro Pocid, irdeo P.O. Eox 59. Jndera NSW 2642 lelephone (02) 6026 3666 .. Fox (02) 6026 3696

Chemical Testing and Consultation for Aariculture, Industry and Environment --,_-- -

LABORATORY REPORT PAGE No -- REPORT No. :00/142 DATE: 21/3700

CLIENT: Coffey Partners 151 Wytarra Drive Nth.Albury 2641 I to 0247 ORDER No. / REFERENCE: AWL 6409/1 / 0244 Water 200196 SA%'SPLE DESCRIPTION: 0244 - Water 200195 02.45 - 0246 - Water 200197 0247 - Water 200198 DATE RECEIVED: 8/3/00 I METHOD: RL 80/10/- RESULTS FOR SAjPLE No. 0244 to 0247

I ORGAN OCHLO RINE 0246 0247 RESIDUE ug/1 0244 0245 <0.1 <0. 1 .BHC <01 <0.1 <0.1 <0.1 <0.1 <0. 1 I UCB <0.1 ,4BHC <0.1 <0.1 <0.1 <0.1 <0.1 (0.1 L1NDANE 40.1 I HEE'TACHLOR EPDX1DE <0.1 <0.1 <0.1 • <0.1 <0.1 <0.1 <0.1 DDE <0.1 <0.1 DIELDEIN <0.1 <0.1 <0.1 40.1 <0.1 <0. 1 DOD <0.1 <0.1 DDT <0.1 <0.1 I <0.1 <0.1 <0.1 c0.1 TOTAL DOT <0.1 <0.1 HEPTACHLOR 60.1 <0.1 <0.1 <0.1 <0.1 <0.1 ALDRIN <0.1 <0. 1 OXYCHLORDANE <0.1 <0.1 I <0.1 <0.1 <0.1 <0. 1 ENDR1H <0.1 <0. 1 PCBs <0.1 <0.1.

Saip1es contain no OC Pesticides. I

?( / 1 /00 I CHEMIST FORWARDING RESULTS DATE - ( 700 MANAGER - PAUL WAREHAFI BSC. SYD.UNI. DATE /?

25/03 '00 09:58 TX/RX NO.3818 P.00L 25-03 00 09:59 2 02 6026 3696 RIVERINA L8S.

RIVERNA 1.ABORATORLES

95 Urona Poad. Jndero P.O. Box 59. Jindero NSW 2642 letephone (02) 6026 3666 Fax (02) 6026 3696

Chemical Testing and Consultofion for Agriculture. Industry and Environment

LABORATORY REPORT PAGE No ------REPORT No. :00/144 DATE: 2373/00 I CLIENT: Coffey Geosciences E'/L PD Box 803 I Albury NSW 2640 ORDER No. / REFERENCE: AWL 6409/1 / 0244 to 0247 SAMPLE DESCRIPTION: 0244 - Water 200195 0245 - Water 200196 - 0246 - Water 200197 0247 - Water 200196 DATE RECEIVED: 8/3/00 METHOD: Gas Chromatography

RESULTS FOR 0244 to 0246 0247 I PAH's ug/1 0244 0245 0246 Naphthalerie <0.5 <0.5 <.0.5 <0.5 Acenaphthalene <0.5 KU_S <0.5 <0.5 I Acenaphthene <0.5 <0.5 <0.5 <0.5 Fluorene <0.5 <0.5 <0.5 <0.5 Phenanthrene <0.5 <0.5 <0.5 <0.5 Anthracene <0.5 <0.5 <0.5 <0.5 I Fluoranthene <0.5 <0.5 <0.5 <0.5 Pyrene <0.5 <0.5 <0.5 <0.5 Benzoanthracene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 I Chrysene Benzo(b)fluoranthene <0.5 <.0.5 <0.5 <0.5 Benzo(k)fluorantherze <0.5 <0.5 <0.5 <0.5 Benzo(a)pyrene <0.5 <0.5 <0.5 <.0.5 I Indolpyrene <0.5 <0.5 <0.5 <0.5 Dibenzoanthraceno <0.5 <0.5 <0.5 <0.5 Benzoperylene (0.5 <0.5 <0.5 <0.5

I Total PAIIB <0.5 <0.5 <0.5 <0.5

CHEHIST FORWARDING RESULTS DATE

I MANAGER PAUL WAREHAM BSC. SYDNEY UNI. DATE U / ? /00

25/03 '00 09:58 TX/RX NO.3818 P.006 A.C.N. 003 692 019 COFFEY job no.

chain of custody No: 18390 Laboratory Quotation No. (if applicable) box no: of

despchto: 42 consigning ofice: k'v-/ Lc..1ei phone no) date despatched: f73 project manager: attention: (report results to) , courier service: ,,I- -' consignment note no: -

relinquished by date time received by date time

Joan

sample locality date sample condition sample type sample number analysis requested (borehole etc( sampled upon receipt

I, --- '/7/f

_ -_- --

special laboratory instructions:

NOTE - JOB NUMBER MUST BE REFERENCED ON ALL SUBSEQUENT COMMUNICATIONS iz- turnaround required: AWL6409/1 -BG 19 May 2000

APPENDIX B

GROUNDWATER MONITORING ANALYTES (From NSW EPA Environmental Guidelines: Solid waste Landfills, 1996)

p SOLID WASTE LANDFILLS

in contact with groundwater, and that the Hydrological measurements to establish the Groundwater Assessment Program must be standing water level with an accuracy of ±0.3 implemented. centunetres. All groundwater detection monitoring wells and Well purging to remove stagnant water from well lysimeters should be sampled by a suitably qualified casing. Wells must be purged until successive pH and approved person on a quarterly basis. More readings agree by 0.1 pH unit, or redox potential is frequent sampling may be required if the strata is ±10% of the previous reading. These readings highly permeable or contains highly vulnerable should generally be taken after a minimum of two groundwater. This frequency may be relaxed if the well volumes have been purged. occupier can demonstrate that there are no seasonal Samples must be taken with a positive displacement effects and the data is statistically constant after data has pump or dual valve bailer. When taking the been collected for at least five consecutive years. organic samples the flow rate should be reduced to approximately 100 mi/minute to reduce the loss of

TABLEz volatile components. INDICATOR PARAMETERS FOR GROUNDWATER DETECTiON MONITORING Anions, cations and alkalinity determinations PROGRAM should be made on unfiltered samples since Required filtration may cause changes in their values. Detection Level Filtration and preservation of the other samples, as Chemical or Property (RDL) in i.tg/L necessary, should be performed in the field. Absorbable organic halogens (AOX) 10 Field analysis of samples shall be performed for Alkalinity 1,000 alkalinity, pH, eH and temperature. Ammonia 50 Sample containers and presevation shall follow the Calcium 5,000 procedures outlined in the present edition of,. Chloride . 5,000 Standard Methods for the Examination of Water and Wastewater (APHA 1995). Fluoride 500 The minimum field quality control requirements Iron 300 should generally comprise: Magnesium 5,000 Testing of field blanks (representing five per cent or Manganese 50 at least one blank where less than 20 samples are Nitrate 100 analysed in a batch) with a documented pH . 0.1 pH unit investigation report required if blanks exceed the Total phenolics* 50 required detectiomi limits. Potassium 5,000 Testing of field spikes (representing five per cent or at least one spike where less than 20 samples are II Sodium 5,000 analysed in a batch) with documented investigation SulpFte 5,000 report required if spike recovery is qutside the 80- 'U Total organic carbon (TOC)** 50 120% range. The USEPA Handbook (1991) * Total phenolics or summation of 17 individual phenol-.containing provides detailed instruction on the preparation and compounds identified by USEPA Method 8040 (USEPA 1992). use of field spikes. ** For groundwater analyse filtrate from a 045 micron pore diameter II filter; for surface water analyse TOC on an unfiltered water sample. Testing of duplicate field samples (representing five ,per cent or at least one duplicate where less than 20 samples are analysed in a batch) with a requirement Water samples should be taken in accordance with II for a documented investigation report if the procedures outlined in the USEPA's Handbook: variation between duplicates exceeds 20% relative Groundwater. Volume II: Methodolo,gy (1991). It is per cent difference (RPD). recornn'sended that this handbook be referred to directly, but the appropriate sampling procedures are Statistical procedures are to be used for all analytical summarised below: results to determine if there has been a significant change in concentration for the indicator

22 Austra'ia Overseas Australian Capital Territory Queensland Indonesia Canberra Brisbane Jakarta 265 Canberra Avenue 53B Fairlawn Street Level 12 Wisma Bank Dharniala Fyshwick ACT 2609 Nathan OLD 4111 JL Jenderal Sudirman Kay 28 Telephone +61 2 6280 4732 Telephone +61 7 3274 4411 Jakarta 12910 Indonesia Facsimile +61 2 6280 6650 Facsimile +61 7 3274 4977 Telephone +6221 523 9290 Facsimile +622 1 523 9287 Canberra Testing Services Maruochydore 265 Canberra Avenue Unit 4/8 Kelly Court Malaysia Fyshwick ACT 2609 Maroochydore OLD 4558 Kuala LunipLir Telephone +61 2 6280 4261 Telephone +61 7 5443 5922 50A Jalan USJ 10/1 B Facsimile +61 2 6280 6650 Facsimile +61 7 5443 5895 47600 UEP Subanci Jayn Selangor Dawl Elisaii Canberra City Townsville Malaysia Coffey MPW Pty Ltd 1/46 Pilkington Street Telephone +60 3 732 4513 Suite 2 Northbourne Chambers Garbutt OLD 4814 54 Northbourne Avenue Facsimile +60 3 /32 4253 Telephone +61 7 4775 4500 Canberra City ACT 2601 Facsimile ±61 7 4775 5497 Philippines Telephone +61 2 6248 7366 Manila Facsimile +61 2 6248 7157 South Australia 10th Floor Strata 100 Ruilduig Adelaide New South Wales Emerald Avenue, Pasig 148 Henley Beach Road Albury Metro Manila Philippines Mile End SA 5031 151 Wytarra Drive Telephone +63 2 636 8287 Telephone +61 8 8352 1744 North Albury NSW 2640 Facsimile +63 2 638 3542 Facsimile ±61 8 8234 0932 Telephone +61 2 6040 3847 Hong Kong Facsimile +61 2 6040 3861 Tasmania Hong Kong Hobart Aistonville Suite 2207-9, lower Two, Lippo Centre 289-291 Liverpool Street Unit 1/38 Kays Lane 89 Queensway, Hong Kong Hobart TAS 7000 Russellton Park Telephone +852 2530 8816 Telephone ±61 3 6234 9955 Alstonville NSW 2477 Facsimile +852 2530 8116 Facsimile +61 3 6234 9577 Telephone ±61 2 6628 3224 Facsimile +61 2 6628 3224 Victoria Melbourne Gosford 16 Church Street 42 Hills Street Hawthorn VIC 3122 Gosford NSW 2250 Telephone +61 3 9853 3396 Telephone +61 2 4323 3585 Facsimile +61 3 9853 0189 Facsimile ±61 2 4323 6477

Newcastle Western Australia 13 Mangrove Road Perth Sandgate NSW 2304 33 Walters Drive Herdsman WA 6017 Telephone +61 2 4967 6377 Facsimile +61 2 4967 5402 Telephone +61 8 9446 7888 Facsimile +61 8 9446 7999 Sydney 142 Wicks Roads North Ryde NSW 2113 Telephone ±61 2 9888 7444 Facsimile +61 2 9888 9977

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Wollongong Unit 1/222 Berkeley Road Unanderra NSW 2526 Telephone +61 2 4272 6071 Facsimile +61 2 4272 6075