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POST CLOSURE

MANAGEMENT PLAN

TRANSPACIFIC CLEANAWAY PTY LTD TULLAMARINE CLOSED LANDFILL

LANDFILL GAS MANAGEMENT PLAN

MAY 2010

REVISION 001

Landfill Gas Management Plan Revision 001 May 2010

Transpacific Cleanaway Tullamarine

TABLE OF CONTENTS

1 Transpacific Cleanaway Commitment ..........................................................................1

2 Introduction ....................................................................................................................2

2.1 Purpose.............................................................................................................................. 2

2.2 Scope ................................................................................................................................. 2

2.3 Institutional Framework .................................................................................................... 2

2.4 Post Closure- Pollution Abatement Notice...................................................................... 2

3 Landfill Gas Overview....................................................................................................4

3.1 Generation ......................................................................................................................... 4

3.2 Composition ...................................................................................................................... 4

3.3 Movement .......................................................................................................................... 4 Figure 1: Landfill Gas Overview.................................................................................................................... 5

3.4 Issues................................................................................................................................. 5

3.5 Control ............................................................................................................................... 5

3.6 Beneficial Use.................................................................................................................... 6

4 Site Information ..............................................................................................................7

4.1 Location ............................................................................................................................. 7

4.2 Description ........................................................................................................................ 7 Figure 3: Topography Former Quarry............................................................................................................ 7

4.3 Utility Services................................................................................................................. 10

4.4 Geology............................................................................................................................ 10 Table 1: Geological Units............................................................................................................................. 10

4.5 Hydrogeology .................................................................................................................. 10

4.6 Local Meteorology........................................................................................................... 11

4.7 Future Land Use .............................................................................................................. 11

5 Landfill Gas Generation and Recovery Estimate.......................................................12

5.1 Overview .......................................................................................................................... 12

5.2 Methodology.................................................................................................................... 12

5.3 Data Sources and Assumptions..................................................................................... 13

5.4 Results ............................................................................................................................. 14

5.5 Uncertainty ...................................................................................................................... 14

6 Existing Landfill Gas System ......................................................................................16

6.1 Overview .......................................................................................................................... 16

6.2 Details of Landfill Gas System ....................................................................................... 16

7 Risk Assessment..........................................................................................................18



7.1 Methodology.................................................................................................................... 18

7.2 Context............................................................................................................................. 18

7.3 Potential Pathways.......................................................................................................... 18

7.4 Potential Receptors......................................................................................................... 18

7.5 Consequence Descriptors .............................................................................................. 19 Table 2: Consequence descriptors .............................................................................................................. 19 Table 3: Likelihood Categories .................................................................................................................... 19 Table 4: Risk Ranking.................................................................................................................................. 20 Table 5: Risk Matrix ..................................................................................................................................... 20

7.6 Risk Analysis................................................................................................................... 21 Table 6: Summary of On-Site Risks ............................................................................................................ 21 Table 7: Summary of Off-Site Risks ............................................................................................................ 23

7.7 Risk Evaluation................................................................................................................ 25

8 Actions and Recommendations..................................................................................26

8.1 Overview .......................................................................................................................... 26 Table 8: Actions ........................................................................................................................................... 26

8.2 Facilities and Structures Monitoring.............................................................................. 29

8.3 Installation of treatment technology .............................................................................. 29

8.4 Indirect sub-surface monitoring of methane in groundwater ...................................... 30

8.5 Perimeter migration monitoring ..................................................................................... 30

9 Contingency Plan .........................................................................................................32

9.1 Monitoring........................................................................................................................ 32

9.2 Corrective Action Plan .................................................................................................... 32

10 Review .......................................................................................................................33

10.1 Overview .......................................................................................................................... 33

10.2 Document Revision......................................................................................................... 33 Table 9: Document Revision........................................................................................................................ 33

FIGURES...............................................................................................................................34

FIGURE 2: Site Location Map..................................................................................................... 34

FIGURE 4: Site Plan .................................................................................................................... 35

APPENDICIES ......................................................................................................................36

APPENDIX A: Pollution Abatement Notice................................................................................ 36

APPENDIX B: Dial Before You Dig Plans .................................................................................. 37

APPENDIX C: Summary of Landfill Gas Generation Estimates............................................... 38

APPENDIX D: Mound 3 Gas Collection System........................................................................ 39



APPENDIX E: Mounds 1& 2 Gas Collection System- Technical Specifications ..................... 40

APPENDIX F: Solar Powered Landfill Gas Flare ....................................................................... 41

APPENDIX G: Certification of Management Systems............................................................... 42

APPENDIX H: Facilities & Structures Monitoring ..................................................................... 43

APPENDIX I: Landfill Gas Flare Maintenance Schedule........................................................... 44

APPENDIX J: Results of methane in groundwater monitoring................................................ 45

APPENDIX K: Proposed perimeter migration wells.................................................................. 46

APPENDIX L: Landfill Gas Well sampling methodology .......................................................... 47



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2 Introduction 2.1 Purpose This Landfill Gas Management Plan has been prepared by Transpacific Cleanaway Pty Ltd for the closed landfill located at Western Ave, Tullamarine, Victoria 3043. The purpose of the plan is to provide a summary of available information regarding current conditions at the Tullamarine landfill (the site), and to provide an outline of the strategy and actions being taken to manage landfill gas emissions generated by the historic landfilling of waste to prevent an adverse impact on human health and the environment. 2.2 Scope This plan addresses management of landfill gas, specifically methane, at the site up to and including any treatment technologies of landfill gas. Detail regarding ambient air quality after treatment and the general ambient air at the landfill is provided in the separate Ambient Air Management Plan. 2.3 Institutional Framework Landfills are an important part of Victoria’s waste management infrastructure for wastes that cannot be recycled or reused and these facilities are regulated by EPA Victoria. EPA Victoria has issued a number of policies and guidelines pertaining to landfills with respect to landfill gas including:

• EPA Publication 788 – Siting, Design, Operation and Rehabilitation of Landfills

• EPA Publication 755 – Methane Generation from Victorian Landfills

• EPA Publication 754 – Greenhouse Gas Emissions from Landfills and Wastewater Treatment Facilities – EPA Tools and Resources

• EPA Publication 722 – Environmental Guidelines for Reducing Greenhouse Gas Emissions from Landfills and Wastewater Treatment Facilities

2.4 Post Closure- Pollution Abatement Notice A post closure Pollution Abatement Notice (PAN) was issued by EPA Victoria on 4th December 2009. Several conditions contained with in this PAN relate landfill gas, and they are:

• Wastes deposited within the landfill will generate landfill gas. Landfill gas must be monitored and managed to prevent gas migration beyond the landfill.

• By 30 May 2010, you must provide to EPA a Landfill Gas Management Plan that;

o Sets out required actions and timeframes fro reducing the fugitive and uncontrolled vented gas releases from the landfill; and

o A gas monitoring program to demonstrate that ambient gas levels at or near the landfill

do not exceed design criteria specified in State Environment protection Policy (Air Quality Management)

• On receiving written direction from EPA, you must implement the Landfill Gas Management Plan.



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• By December 2011, and thereafter at a frequency approved in writing by EPA, you must submit to EPA a revised Post Closure Management Plan, incorporating environmental auditor reviewed and recommended actions and tasks, including the monitoring and reporting programs described in the Landfill Gas Management Plan.

• You must implement the Post Closure Management Plan as approved in writing by EPA. A copy of the post closure Pollution Abatement Notice is provided in Appendix A.



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3 Landfill Gas Overview 3.1 Generation

Landfills produce landfill gas as organic materials decompose under anaerobic conditions. Anaerobic conditions occur when oxygen present in the voids of refuse placed at a landfill is consumed by aerobes (micro-organisms which consume air to grow), leaving an environment that is free of oxygen. The landfill gas generation rate is affected by many factors including refuse composition, the waste age and quantity, condition of the waste mass, moisture content, pH, temperature, and maintenance of an anaerobic environment. Solid waste landfills are capable of generating LFG for many years, with sources such as the United States Environmental Protection Agency (USEPA) citing a 20 to 30 year or longer life for generation of landfill gas. 3.2 Composition Landfill gas contains approximately equal parts of methane and carbon dioxide by volume. Other gases such as volatile organic compounds (VOC’s) and hydrogen sulphide may also be present in landfill gas in trace concentrations. Methane is a colourless, odourless gas that is explosive in concentrations ranging from 5 percent (the lower explosive limit, LEL) to 15 percent (the upper explosive limit, UEL) in air. At concentrations above 15 percent methane is flammable. Methane is a potent greenhouse gas, has a Global Warming Potential (GWP) of 21, and is recognised as being a contributor to global warming. Carbon dioxide is a colourless, odourless, and non-combustible gas. Carbon dioxide is also a greenhouse gas, which has a GWP of 1. However, carbon dioxide emissions from wastes that are disposed at the site, and other landfills, do not contribute to global warming as they are considered to be “biogenic” in nature (i.e. will occur naturally or by whatever waste management method used). Landfill gas has its own characteristic odour due to the presence of trace compounds. Some of the more significant odour causing classes of trace constituents include esters, phenols, organic acids, solvents, and sulphur compounds. 3.3 Movement

Once generated, landfill gas will move through refuse and soil in a landfill disposal area site by both

convection and diffusion. Convection is the movement of gas from an area of higher pressure to an

area of lower pressure. Diffusion is the movement of gas from an area of higher concentration to an

area of lower concentration.

Landfill gas may not be completely contained within the landfill disposal area and the landfill gas may

be discharged through the landfill surface or could potentially migrate through subsurface soils

outside the landfill disposal area. The rate of discharge to air is dependent on the nature of the

landfill cover system and whether the landfill includes a landfill gas control system.



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The distance which landfill gas can migrate is highly dependent on a number of factors including the

quantity of refuse in the landfill, the configuration of the landfill, the geology of the surrounding strata,

the presence of man-made pathways, the presence of physical barriers, and the type of cover system

on the landfill. In addition, meteorological conditions can impact the rate of landfill gas emission and

migration. These conditions include barometric pressure changes, precipitation, and other

parameters such as ice and snow.

Landfill gas components can also be adsorbed onto soil particles, transferred to water or oxidised by

methane consuming (methanotropic) bacteria. These phenomena may reduce emissions and

migration of landfill gas from the site. A diagram showing the pathways for landfill gas movement is

provided below.

Figure 1: Landfill Gas Overview

3.4 Issues The emission and migration of landfill gas may potentially have adverse effects on the environment including fire and explosion, health risk, odour nuisance, vegetative distress, and groundwater contamination. As previously indicated, the methane component of landfill gas is a potent greenhouse gas, which has been linked to global warming and climate change. 3.5 Control There are three types of systems that are used to control the discharge of landfill gas to the environment. These measures, which can be used either individually or in combination, include passive and active landfill gas systems, and physical barriers.



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3.6 Beneficial Use Landfill gas can also be utilised to generate energy, thus transforming an environmental problem into a useful energy source.



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4 Site Information 4.1 Location The site is located in Tullamarine, VIC 3043, and is bounded by:

• North- Moonee Ponds Creek and to the north of the creek a former quarrying area which is currently being filled;

• South- Tullamarine Freeway and the south of the freeway Melbourne Airport car park and associated industries;

• East- Vacant land owned by Transpacific (intersected by Victoria St). Approximately 500m east of the site are residential properties.

• West- Filled land and a proposed future commercial development, and approximately 700 m further to the west is the Melbourne International Airport and associated industries

A site location map is provided in Figure 2. 4.2 Description Historical The site originally operated as a quarry until 1971. The main quarry hole was excavated within the southern and western part of the site at two levels. The main hole was excavated to an elevation of RL 88m AHD, and an upper quarry bench was located to the south of the main quarry hole with an RL of 100m AHD. Surface contours of the former quarry are depicted in Figure 31.

Figure 3: Topography Former Quarry

1 From Golder Associates Hydrogeological Conceptual Model, Version 3, Cleanaway landfill Tullamarine. September 2007.

04613711/6022



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1970s A Certificate of Registration was issued by the Shire of Bulla to Industrial Waste Collection (VIC) Pty Ltd for operation of an Industrial Waste Tip in January 1972. The permit conditions allowed for disposal of solid and liquid waste. No domestic garbage was allowed, except for small quantities that were mixed in with other waste. Waste disposal commenced in 1972 in the eastern end of the main quarry hole (Mound 1) and placement progressed in a westerly direction and then to the northern part of the quarry hole (Mound 2). Both solid and liquid waste was accepted at the site and placed into craters, with excess liquid collected at the toe of the waste pile. Large diameter leachate collection sumps were installed for leachate recovery and consist of perforated concrete cylinders placed on top of each other. In 1976 work commenced on the installation of a side clay liner across the higher permeable Brighton Group sediments. The side liner construction commenced along the south east and southern side of the landfill and was keyed into the top of Older Volcanics. There is no base liner at the site. Estimates from the early years of operation indicates approximately 80 percent of the waste accepted at the site was inert and 20 percent was prescribed industrial waste. 1980s Waste placement in the main quarry hole (Mound 1&2) continued during the 1980s. Four leachate treatment ponds in the north eastern section of the site (outside of the landfill) were completed in 1981. The ponds are situated on overburden consisting of clayey sands and gravel. By December 1985 Mound 1 was mostly filled and landfilling was confined to Mound 2. Side liner construction continued around the north side of the landfill, and work was carried out to separate the most northern part of the quarry from the southern waste filled area (now the rock pond). This consisted of a cut off embankment with clay and membrane, a gravel filled drainage trench, three leachate wells with drainage trench and the western entry to the quarry was filled with overburden. Clay for the side liner was sourced from the area of the site now known as Mound 3, and the bulk of the excavation was to RL 98m AHD. The acceptance of liquid waste directly to landfill ceased in 1987, and a liquid waste treatment plant was constructed on Mound 3. In the late 1980s filling of Mounds 1 and 2 continued. 1990s The cap on Mound 1 and part of Mound 2 was installed in the early 1990’s, and excavation and filling of Mound 3 continued. Construction of the side liner continued around the northern and eastern edges of Mound 3 finally linking with the original side liner on Mound 1. A large volume of solid inert waste was placed in a depression in the northern end of Mound 2, and landfilling continued in Mound 3. In the mid 1990s the operation of the leachate treatment plant ceased due to difficulties in extracting leachate. The remaining area of Mound 2 was capped. Since the late 1990’s all solid inert waste stopped being taken at the site, and only solid prescribed industrial waste was accepted.



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2000s A Works Approval was submitted to EPA Victoria and received was approved in 2002 to enable the upgrade of the existing landfill cap (on Mounds 1 and 2). This work which entailed:

• Removing old cap on Mounds 1 and 2;

• Further placement of waste in Mounds 1 and 2 to achieve a specified profile;

• Installation of new cap to the same specifications as required by EPA on Mound 3;

• Raising of the side liner to tie into the cap. A new leachate extraction system was installed in 2002 at around the same time as the discovery of Light Non Aqueous Phase Leachate (LNAPL) in the old quarry area of the site (Mounds 1 and 2). The capping of Mound 3 was completed in October 2006 with a 1.5 metre cap placed over approximately 10.6 hectares. Underneath the capping layer is a gas collection system which collects and vents landfill gas through one central point. The removal of the old cap continued in Mounds 1 and 2, and the further landfilling in these areas to achieve profile continued. The site ceased accepting waste in February 2008, and in May 2008 EPA issued a notice no longer permitting the acceptance of waste at the site. All but 3 older concrete leachate extraction wells on-site were decommissioned in March 2009, as they were no longer being used for leachate extraction. Re-shaping to achieve profile commenced in September 2008, and the installation of the cap on Mounds 1 and 2 commenced in April 2009. The final cap is to be installed by March 2011. Other site features The entire site occupies an area of approximately 41 hectares, this consists of approximately 29 hectares for the landfill area and a remaining 12 hectares is used for other activities;

• North- leachate treatment plant including four 5ML ponds, a hardstand area comprising of bin storage and paint shed

• East- Municipal truck parking area and office

• South- Car parking, maintenance sheds, and offices

• West- Maintenance workshop, portable offices. A site plan is provided in Figure 4.



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4.3 Utility Services A number of utility companies maintain underground services in the vicinity of the site. These services may provide preferential pathways for methane to migrate to adjacent properties. Methane may also accumulate in these service areas, posing a potential danger to workers. Details of all underground services have been collected by performing a dial before you dig search for the area. Copies of plans obtained from the dial before you dig searches are provided in Appendix B. 4.4 Geology Several geological units occur at and around the site (from younger to older):

Table 1: Geological Units

Unit Description

Newer Volcanics Basalt which varies from rock to extremely weathered clay

Brighton Group Sediments consisting mainly of medium to coarse quartz sands

Older Volcanics Basalt which varies from the rock quarried at the site to extremely weathered materials (i.e. clays)

Werribee Formation Equivalent

Sandy deposits at the base of the paleo valleys and interflows of the Older Volcanics. These deposits do not outcrop at the site surface

Silcrete A silaceous cap which appears to have been formed on the paleo surface of the siltstones

O

ldest �

Y

oungest

Siltstone Fractured and variably weathered to clays. Outcrops observed in the bed of Moonee Ponds Creek and downstream of the site

4.5 Hydrogeology The main aquifer units at the site are the Older Volcanics, Werribee Formation Equivalent deposits and Siltstone. The clay side liner installed against the Brighton Group around the perimeter of the 3 mounds of the landfill exists above the current groundwater level. Hydraulic interconnection between aquifers is complex and in some areas is not well understood. The landfill acts as an enhanced local recharge zone, resulting in a local mounding of the groundwater table. Locally to the north and north-west of the landfill site the groundwater flows towards and discharges to the Moonee Ponds Creek. Regionally groundwater flow direction is generally south and south west towards the Maribyrnong River and Port Phillip Bay.



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4.6 Local Meteorology Local weather conditions have been obtained from the nearby Essendon Airport. The mean maximum temperature is reported to be 19.5OC, mean minimum temperature 9.1OC, and mean rainfall is 584.9mm.

4.7 Future Land Use A re-zoning application was submitted to Hume City Council in November 2009 for the landfill site and associated buffer land. The re-zoning application was submitted to change the zoning from rural to a combination of ‘Industrial 1’ for the closed landfill and ‘Business 3’ for the depot area and associated buffer land. The concept plan to date includes the future use of the landfill site for car parking and storage. The current depot land and buffer landfill was illustrated to show use for warehousing, distribution and offices associated with industrial use.



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5 Landfill Gas Generation and Recovery Estimate 5.1 Overview Landfill methane generation and recovery estimates provide the fundamental information that is required for reporting, as well as for design of landfill gas management systems. There are two primary methods for estimating landfill emissions – the recently developed NGERS Method 1 (which is required for NGERS reporting in Australia) and the traditional Landgem model that has been developed by the United States Environmental Protection Agency. The NGERS model has significant limitations, and is known to produce erroneous results. The Landgem model is considered to be more appropriate for “design” of landfill gas management systems. 5.2 Methodology The Landgem model uses a first order decay equation, as follows:

Q = Lo R (e-kc - e-kt) Where:

Q = Methane generated in current year (m3/yr)

Lo = Methane generation potential (m3/Mg of refuse)

R = Average annual waste acceptance rate (Mg/yr)

k = Methane generation rate constant (1/yr)

c = Time since/to landfill closure (yr)

t = Time since landfill opened (yr) To allow for variances in annual acceptance rates, a derivative of the above equation with respect to t can be used to estimate methane generation from waste landfilled in a single year (Rx). In this equation, the variable t is replaced with T-x, which represents the number of years the waste has been in the landfill. The resulting equation thus becomes:

QT,x = k Rx Lo e-k(T-x)

Where:

QT,x = The amount of methane generated in current year (T) by the waste Rx in (m3/yr)

Lo = Methane generation potential (m3/Mg of refuse) Rx = The amount of waste disposed in the year (x) (Mg)

k = Methane generation rate constant (1/yr)

x = The year of waste input

T = Current year



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In order to estimate the current emissions from waste placed in all years, the above equation can be solved for Rx and the results summed as shown below:

QT = Sum QT,x

Input data for the model was developed from a review of available information for the site. A further calculation was performed to convert the methane generation rate into a landfill gas generation rate. The projected landfill gas generation rate for the site was calculated by multiplying the methane generation result by two, which is based on landfill gas comprising 50 percent methane and 50 percent carbon dioxide. An additional calculation was performed to estimate the quantity of landfill gas that could potentially be recovered from a site. A brief discussion of the key input information, assumptions, and model outputs are provided below. 5.3 Data Sources and Assumptions Tonnage of Solid Waste The annual quantities of solid waste received at the site were obtained from weighbridge records for the period from 1993 to 2008. Records of waste volumes received at the site prior to 1993 have been obtained and tonnages have been estimated. For some years, no data was available and estimated have been made based on extrapolation of results from other years. However, there is significant uncertainty relating to the accuracy of this data. Methane Generation Potential (Lo) The methane generation potential (Lo) depends upon the composition of refuse present in a landfill. The USEPA reports that the values for (Lo) can range from 6.2 to 270. In addition, the USEPA has established the following default parameters for Lo for municipal solid waste landfills:

• Clean Air Act (CAA) default value of 170 m3/Mg

• AP-42 “old” default value of 125 m3/Mg

• AP-42 default value of 100 m3/Mg

Experience has shown that the CAA default value significantly overestimates methane generation potential for most waste streams, both in the United States and Australia. The “old” AP-42 default value for Lo of 125 m3/Mg may be appropriate for sites that receive significant quantities of organic waste material (and where no resource recovery activities are occurring). For comparison, the Lo value calculated for the site using the NGERS methodology was 78 m3/Mg. Based on available data for the site, the following values for Lo were selected for evaluation:

• NGERS calculation of 78 m3/Mg Methane Generation Rate Constant (k) The methane generation rate constant (k) determines the rate of generation of methane for refuse in a landfill. For comparison, the USEPA reports that the values of k can range from 0.003 per year to 0.21 per year. The USEPA has also established the following default parameters for k:



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• Clean Air Act (CAA) default value of 0.05 1/yr

• AP-42 default value of 0.04 1/yr for moderate climates and 0.02 1/yr for dry climates

• A default value of 0.07 for “co-disposal” sites that received liquid and hazardous wastes. For comparison, the k value calculated for the site using the NGERS methodology was 0.021 1/yr.

Based on available data for the site, the following values for k were selected for evaluation:

• 0.09 1/yr from 1972 until 1986 (to reflect disposal of liquid wastes during this period) then 0.04 1/yr from 1987 onwards.

Recovered Methane Rate Per Year A landfill gas flare was installed in Mound 3 at the site in early 2010. The landfill gas system is “passive” and gas vents from the landfill, assisted by a small (solar powered) fan. After a period of balancing, gas quality and flow rates were monitored and the flow rate is estimated to be approximately 150 cubic metres per hour. Oxidation Correction Factor A value 0.1 was used for the oxidation correction factor, which is consistent with IPCC methodology. 5.4 Results One model run was performed to estimate the expected “range” of landfill gas generation and recovery rate at the site. The modelling indicates that the landfill gas generation rate in 2010 may be in the range from approximately 1,470 cubic metres per hour of landfill gas (@ 50 percent methane). A summary of the input data and results is provided in Appendix C. The modelling also indicates that the total quantity of methane that is generated at the site peaked in approximately 1987 (following cessation of liquid waste disposal). Landfill gas quantities have been declining since that time and will continue to decline into the future. 5.5 Uncertainty There are four areas of uncertainty in the estimate of methane emissions from solid waste disposal in landfills (which are consistent with industry experience). They include:

• Uncertainty attributable to the method;

• Data uncertainty;

• Uncertainty associated with the performance of the landfill gas recovery systems

• Uncertainty regarding the oxidation rate of methane as is passes through the landfill cap. The NGERS methodology is the preferred approach for estimating methane emissions from landfill sites in Australia. However, as this method is still being developed - the primary area of uncertainty relates to the method itself and its application to the site, which has been a “co-disposal” landfill and not a “traditional” municipal solid waste landfill. As a result, the Landgem methodology was used for preparing the estimates.



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Another area of significant uncertainty relates to the quality of the input data and limited information is available regarding the composition of the waste received prior to 1993. Based on the considerations outlined above, the accuracy of the methane generation model is estimated to be in the range of plus or minus 50 percent for the current year, with potentially greater variances over the long-term.



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6 Existing Landfill Gas System 6.1 Overview A passive landfill gas blanket and venting system has been installed underneath the completed 1.5 metre thick capping layer on Mound 3 of the landfill. The gas is currently being treated by flaring. Capping is currently being undertaken on Mounds 1 and 2 of the landfill site, and will be completed by March 2011. A passive landfill gas blanket and venting system is also being installed underneath the capping layer in these mounds, and when completed the landfill gas from these vents will also be managed. 6.2 Details of Landfill Gas System Gas Collection System The gas collection system on Mound 3 consists of 8 horizontal gas collection trenches with a combined length of over 1,000m extending radially out from the crest of the mound. Within each trench crushed rubble and gravel surround a 75-80mm diameter slotted pipe. Outside the collection trench is a 500mm thick crushed rubble layer over the crest of the mound. All of the collection trenches connect to one central venting point. The report on construction of the Gas Collection System on Mound 3 is provided in Appendix D. The gas collection system on Mounds 1and 2 is partially installed and is being constructed in conjunction with capping activities at the site. Mounds 1 and 2 both have a total of 12 horizontal gas collection trenches, and in addition has a number geosynthetic gas drains which are to be joined to the gas trenches. The collection trenches will connect to a central venting point on top of each mound. An extract of the Mounds 1 and 2 Earthworks Technical Specification pertaining to the gas collection system is provided in Appendix E. Landfill Gas Flare A landfill gas flare and solar powered vacuum were installed on the Mound 3 gas collection point vent (GCP3) in January 2010. The flare is a Solar Spark Landfill Gas Vent flare supplied from Landfill Service Corporation in the United States, and was installed by Run Energy Pty Ltd. Features of the Solar Spark Landfill Gas Vent flare include:

• All weather stainless steel spark pilot

• Solar powered continuous ignition system, which can operate in 21 days of darkness with a fully charged system

• Stainless steel ball valve

• Inline flame arrestor

• Solar powered vacuum fan



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• Stainless steel visibility shield Further detail regarding the flare specifications, flare diagram and regulatory compliance data is provided in Appendix F.



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7 Risk Assessment 7.1 Methodology In order to assess the potential for issues associated with landfill gas (methane) migration at the site Transpacific has undertaken a Qualitative Risk Assessment using AS/NZS ISO 31000:2009 Risk Management- Principles and Guidelines. 7.2 Context In this approach a conceptual site model has been developed identifying sources of methane, pathways by which methane can travel and potential receptors of methane. The risk assessment will be utilised to identify where further information is required, and the analysis of risk will be further defined as additional information becomes available. 7.3 Potential Pathways The following pathways have been identified as providing potential on-site risks from methane:

• Direct release to atmosphere

• Subsurface migration into on-site structures

• Direct release to on-site vegetation The following pathways have been identified as providing potential off-site risks from methane:

• Lateral (subsurface) migration into utility services

• Lateral (subsurface) migration into off-site structures

• Lateral (subsurface) migration to off-site vegetation

• Indirect migration from methane dissolved in leachate or groundwater 7.4 Potential Receptors Potential receptors that are located on-site and in the vicinity of the site include:

• Employees and visitors in on-site structures

• Workers accessing underground utility services adjacent to the east, west and south of the site

• Vegetation to the north, south, east and west of the site

• Residential properties approximately 500 metres to the east of the site

• Employees and visitors in off-site properties to the west and south of the site.



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7.5 Consequence Descriptors Transpacific Industries Group Ltd has adopted a National Integrated Management System (NIMS) to generate and provide policies to cover the core requirements of the following management systems across the entire group of companies:

• AS/NZS ISO 9001:2008 Quality Management Systems

• AS/NZS ISO 4801:2000 Occupational Health and Safety Management Systems

• AS/NZS ISO 14001:2004 Environmental Management Systems These management systems have been certified, and a copy of the certification is provided in Appendix G. The consequences descriptors outlined below were obtained from the NIMS document TIG COR M 0022 Corporate Risk Manual.

Table 2: Consequence descriptors

Level Consequences Interpretation 1 Insignificant No environmental damage

2 Minor On-site release immediately contained

3 Moderate On-site release contained with external assistance

4 Major Off-site release with no significant impact

5 Catastrophic Toxic release off-site with significant impact

Likelihood Categories The likelihood categories were obtained from NIMS document TIG COR M 0022 Corporate Risk Manual:

Table 3: Likelihood Categories

Level Likelihood Interpretation

A Almost Certain The event is expected to occur in most circumstances

B Likely The event will probably occur in most circumstances

C Possible The event should occur at some time

D Unlikely The event could occur at some time

E Rare The event may only occur in exceptional circumstances.



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Risk Ranking The criteria for the level of risk obtained from NIMS document TIC COR M 0022 Corporate Risk Manual is summarised as:

Table 4: Risk Ranking

Category Action

Low Managed by the routine procedures in place Moderate Manage by specific monitoring or procedures, with responsibility

specified High Senior Management attention required, action plans developed and

responsibility specified Extreme Senior Management attention required, action plans developed,

responsibility specified and urgent response

Risk Matrix The matrix used for determining the level of risk is obtained from NIMS documentation TIG COR F 022 4 Risk Score Matrix.

Table 5: Risk Matrix

The risk assessment focuses on the air environment with respect to methane and addresses on-site and off-site issues, and is outlined in the two tables below. The assessment of risk has been based on current site conditions and currently known future uses of surrounding land. If a land use is to change in the future from what has been documented, the assessment of risk in relation to the particular location and receptor will need to be updated.

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ath

way

R

ecep

tor

Im

pact

In

itia

l R

isk

C

urr

en

t C

on

tro

ls/ P

rop

osed

Acti

on

s

Resid

ual

Ris

k

(wit

h

co

ntr

ol)

Direct re

lease to

atm

osphere

(th

roug

h

uncapped landfill

surf

ace)

On s

ite w

ork

ers

(curr

ent and

futu

re)

Hum

an h

ealth

Hig

h

Specific

ally

desig

ned g

as c

olle

ction b

lanket

over

the landfill,

venting

the landfill

gas t

o o

ne

centr

al venting

poin

t (g

as c

olle

ction p

oin

t) o

n

each m

ound.

1.5

metr

e thic

k c

ap c

om

prisin

g o

f cla

y,

geote

xtile

, g

eom

em

bra

ne a

nd s

oil.

Low

Direct re

lease to

atm

osphere

(G

as

Colle

ction P

oin

ts o

r Leachate

Extr

action

Wells

)

On-s

ite w

ork

ers

/ vis

itors

(o

utd

oors

) H

um

an H

ealth

Modera

te

Insta

llation o

f tr

eatm

ent te

chnolo

gy fro

m o

n-s

ite

gas c

olle

ction p

oin

ts a

nd leachate

extr

action

we

lls p

rior

to v

enting t

o a

tmosphere

Low

Direct re

lease to

atm

osphere

(G

as

Colle

ction P

oin

ts o

r Leachate

Extr

action

Wells

)

Off

-site r

esid

ents

/ vis

itors

(o

utd

oors

) H

um

an H

ealth

Low

In

sta

llation o

f tr

eatm

ent te

chnolo

gy fro

m o

n-s

ite

gas c

olle

ction p

oin

ts a

nd leachate

extr

action

we

lls p

rior

to v

enting t

o a

tmosphere

Low

Direct re

lease to

atm

osphere

(fa

ilure

of

treatm

ent te

chnolo

gy)

On-s

ite w

ork

ers

/ vis

itors

(o

utd

oors

) H

um

an H

ealth

Environm

ent

Modera

te

Routine inspection a

nd m

ain

tenance o

f tr

eatm

ent te

chnolo

gy (

curr

ently f

lare

) M

on

itoring o

f tr

eatm

ent te

chnolo

gy (

deta

ils in

Am

bie

nt

Air M

anag

em

ent

Pla

n)

Low

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

2

P

ath

way

R

ecep

tor

Im

pact

In

itia

l R

isk

C

urr

en

t C

on

tro

ls/ P

rop

osed

Acti

on

s

Resid

ual

Ris

k

(wit

h

co

ntr

ol)

Subsurf

ace m

igra

tion

On s

ite w

ork

ers

(subsurf

ace

utilit

ies &

confined s

paces)

Hum

an h

ealth

Hig

h

Work

pla

ce m

onitoring

N

eed t

o insta

ll g

as p

robes

Low

Subsurf

ace m

igra

tion

On s

ite w

ork

ers

(m

ain

tenance s

hop)

Hum

an h

ealth

Low

W

ork

pla

ce m

onitoring

N

eed t

o insta

ll g

as p

robes

Low

Subsurf

ace m

igra

tion

On s

ite w

ork

ers

(off

ice)

Hum

an h

ealth

Low

W

ork

pla

ce m

onitoring

Low

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

3

A s

um

mary

of

off

-site r

isks is o

utlin

ed b

elo

w:

Tab

le 7

: S

um

ma

ry o

f O

ff-S

ite R

isks

B

ou

nd

ary

Path

way

R

ecep

tor

Im

pact

In

itia

l R

isk

C

urr

en

t C

on

tro

ls/ P

rop

osed

A

cti

on

s

Resid

ual

Ris

k

(wit

h

co

ntr

ol)

U

tilit

y w

ork

ers

Hum

an h

ealth

Modera

te

Need t

o insta

ll g

as p

robes

Low

Curr

ently u

ndevelo

ped land

H

um

an h

ealth

(Possib

le f

utu

re)

Low

N

eed t

o insta

ll g

as p

robes

Low

Veg

eta

tion

Flo

ra

Low

N

eed t

o insta

ll g

as p

robes

Low

Subsurf

ace

mig

ration

Resid

ents

500m

east

of site

H

um

an H

ealth

Low

N

eed t

o insta

ll g

as p

robes

Low

Utilit

y w

ork

ers

H

um

an H

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Veg

eta

tion

Flo

ra

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Vic

toria

Str

eet (E

ast)

Indirect

subsurf

ace

mig

ration fro

m

meth

ane d

issolv

ed

in leachate

or

gro

undw

ate

r R

esid

ents

500m

east

of sid

e

Hum

an H

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Subsurf

ace

mig

ration

Veg

eta

tion

Flo

ra

Low

N

eed t

o insta

ll g

as p

robes

Low

M

oonee

Ponds C

reek

(Nort

h)

Indirect

subsurf

ace

mig

ration fro

m

meth

ane d

issolv

ed

in leachate

or

gro

undw

ate

r

Veg

eta

tion

Flo

ra

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

4

B

ou

nd

ary

Path

way

R

ecep

tor

Im

pact

In

itia

l R

isk

C

urr

en

t C

on

tro

ls/ P

rop

osed

A

cti

on

s

Resid

ual

Ris

k

(wit

h

co

ntr

ol)

Utilit

y w

ork

ers

H

um

an h

ealth

Modera

te

Need t

o insta

ll g

as p

robes

Low

Work

ers

at com

merc

ial

pre

mis

es

(Futu

re u

se m

ay a

lter)

Hum

an H

ealth

Modera

te

Need t

o insta

ll g

as p

robes

Low

Subsurf

ace

mig

ration

Veg

eta

tion

F

lora

M

odera

te

Need t

o insta

ll g

as p

robes

Low

Utilit

y w

ork

ers

H

um

an h

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Work

ers

at com

merc

ial

pre

mis

es

Hum

an h

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Deep C

reek

pro

pert

y

(West)

Indirect

subsurf

ace

mig

ration fro

m

meth

ane d

issolv

ed

in leachate

or

gro

undw

ate

r

Veg

eta

tion

Flo

ra

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Utilit

y w

ork

ers

H

um

an h

ealth

Low

N

eed t

o insta

ll g

as p

robes

Low

Work

ers

and v

isitors

at

com

merc

ial pre

mis

es

Hum

an h

ealth

Low

N

eed t

o insta

ll g

as p

robes

Low

Subsurf

ace

mig

ration

Veg

eta

tion

Flo

ra

Low

N

eed t

o insta

ll g

as p

robes

Low

Utilit

y w

ork

ers

H

um

an h

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Weste

rn

Avenue

(South

)

Indirect

subsurf

ace

mig

ration fro

m

meth

ane d

issolv

ed

in leachate

or

gro

undw

ate

r

Work

ers

and v

isitors

at

com

merc

ial pre

mis

es

Hum

an h

ealth

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

5

B

ou

nd

ary

Path

way

R

ecep

tor

Im

pact

In

itia

l R

isk

C

urr

en

t C

on

tro

ls/ P

rop

osed

A

cti

on

s

Resid

ual

Ris

k

(wit

h

co

ntr

ol)

Veg

eta

tion

Flo

ra

Low

M

on

itor

perim

ete

r gro

undw

ate

r m

onitoring b

ore

s f

or

meth

ane

Low

7.7

R

isk E

valu

ati

on

The p

erim

ete

rs o

f th

e T

ulla

marine landfill

site w

here

sensitiv

e r

ecepto

rs a

re locate

d c

urr

ently o

r in

the f

utu

re,

are

consid

ere

d t

o b

e a

s f

ollo

ws:

•

East-

Resid

ential are

a 5

00m

•

West-

Pro

posed d

evelo

pm

ent

There

is c

urr

ently n

o p

erm

anent m

igra

tion m

onitoring s

yste

m insta

lled a

t th

e s

ite. S

ensitiv

e r

ecepto

rs a

re locate

d in the v

icin

ity o

f th

e e

aste

rn a

nd

weste

rn b

oundaries.

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

6

8

Ac

tio

ns a

nd

Reco

mm

en

dati

on

s

8.1

O

verv

iew

A

s a

n o

utc

om

e o

f th

e R

isk A

naly

sis

pro

cess (

see S

ection 7

.6)

are

as a

round t

he s

ite h

ave b

een p

rioritised i

n o

rder

of

pote

ntial

risk i

n r

ela

tion t

o landfill

gas m

igra

tion.

A n

um

ber

of

actions h

ave b

een identified t

o a

ssis

t w

ith f

urt

her

chara

cte

risation o

f th

e r

isk.

Outc

om

es f

rom

these a

ctions w

ill a

ssis

t in

furt

her

re-a

ssessin

g

the r

esid

ual risk f

or

each b

oundary

, path

way a

nd r

ecepto

r.

Belo

w is a

sum

mary

of

actions identified in t

he R

isk A

naly

sis

, and their c

urr

ent sta

tus.

Tab

le 8

: A

cti

on

s

Lo

cati

on

A

cti

on

C

om

men

t S

tatu

s

Tim

eli

nes

On-s

ite

Work

pla

ce m

onitoring

On-s

ite

Mon

itor

serv

ice p

its

Tra

nspacific

Cle

anaw

ay p

erf

orm

ed m

onitoring

of on-s

ite

str

uctu

res, and s

erv

ice p

its u

sin

g h

and h

eld

multi m

ete

r unit (

QR

AE

II)

whic

h c

an d

ete

ct

LE

L%

of O

2,

CO

and H

2S

in

Marc

h 2

010.

�

Com

ple

ted

Testing w

ill b

e

conducte

d a

nnually

On-s

ite

Insta

llation o

f tr

eatm

ent

technolo

gy fro

m o

n-s

ite g

as

colle

ction p

oin

t (G

CP

3)

A s

ola

r pow

ere

d landfill

gas f

lare

has b

een insta

lled o

n

Gas C

olle

ction P

oin

t 3 (

GC

P3)

on m

ound 3

of

the landfill

sin

ce J

anuary

2010.

In p

rog

ress

GC

P3 c

urr

ently

bein

g f

lare

d-

in

com

mis

sio

nin

g

phase t

o d

ete

rmin

e

gas f

low

rate

On-s

ite

Insta

llation o

f tr

eatm

ent

technolo

gy

Oth

er

treatm

ent options c

urr

ently b

ein

g investig

ate

d-

A

feasib

ility

assessm

ent bein

g c

onducte

d t

o d

ete

rmin

e if

a

bio

filter

is a

suitable

meth

od f

or

treatm

ent

of

landfill

gas

from

GC

P3

In p

rog

ress

Feasib

ility

report

due

for

com

ple

tion in J

uly

2010

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

7

Lo

cati

on

A

cti

on

C

om

men

t S

tatu

s

Tim

eli

nes

On-s

ite

Insta

llation o

f tr

eatm

ent

technolo

gy

Oth

er

treatm

ent options c

urr

ently b

ein

g investig

ate

d-

Enclo

sed g

round fla

re

In p

rog

ress

On-s

ite

Insta

llation o

f tr

eatm

ent

technolo

gy fro

m o

n-s

ite g

as

colle

ction p

oin

ts (

GC

P1 &

G

CP

2)

Cappin

g is c

ontinuin

g o

n M

ounds 1

&2 o

f th

e landfill

and

will

be c

om

ple

ted b

y M

arc

h 2

011. W

hen c

appin

g is

com

ple

ted t

he g

as fro

m the c

olle

ction p

oin

ts w

ill b

e tre

ate

d

prior

to d

ischarg

e to a

tmosphere

.

In p

rog

ress

Cappin

g to b

e

com

ple

ted b

y M

arc

h

2011.

On-s

ite

Insta

llation o

f tr

eatm

ent

technolo

gy fro

m leachate

extr

action w

ells

Cappin

g is c

urr

ently b

ein

g u

ndert

aken a

round the o

n-s

ite

leachate

extr

action w

ells

. W

hen c

appin

g is c

om

ple

ted t

he

gas fro

m t

he leachate

extr

action w

ells

will

be c

onnecte

d to

a tre

atm

ent te

chnolo

gy p

rior

to d

ischarg

e to a

tmosphere

.

In p

rog

ress

Cappin

g to b

e

com

ple

ted b

y M

arc

h

2011.

On-s

ite

Routine inspection a

nd

main

tenance o

f tr

eatm

ent

technolo

gy (

landfill

gas f

lare

)

Landfill

gas f

lare

vis

ually

checked o

n a

weekly

basis

C

ontinuin

g

As p

art

of

main

tenance

pro

gra

m for

flare

it is

checked w

eekly

E

aste

rn s

ite

boundary

In

sta

ll g

as p

robes

Tra

nspacific

Cle

anaw

ay w

ill insta

ll perim

ete

r la

ndfill

gas

bore

s a

ppro

xim

ate

ly e

ve

ry 2

00m

alo

ng e

aste

rn b

oundary

of

site.

In p

rog

ress

Q4 2

010

Easte

rn a

rea o

f site

(inclu

din

g o

n-s

ite

and o

ff-s

ite)

Mon

itor

som

e g

roundw

ate

r m

onitoring b

ore

s f

or

meth

ane

Gro

undw

ate

r sam

ple

s fro

m 1

5 g

roundw

ate

r m

onitoring

bore

s w

ithin

the e

aste

rn p

ort

ion o

r to

the e

ast of

the s

ite

analy

sed f

or

meth

ane in F

ebru

ary

2009.

�

Com

ple

ted

NA

Nort

hern

boundary

In

sta

ll g

as p

robes

Tra

nspacific

Cle

anaw

ay w

ill insta

ll perim

ete

r la

ndfill

gas

bore

s a

ppro

xim

ate

ly e

ve

ry 2

00m

alo

ng n

ort

hern

boundary

of

site.

In p

rog

ress

Q4 2

010

Nort

hern

are

a o

f site (

inclu

din

g o

n-

site a

nd o

ff-s

ite)

Mon

itor

som

e g

roundw

ate

r m

onitoring b

ore

s f

or

meth

ane

Gro

undw

ate

r sam

ple

s fro

m 8

gro

undw

ate

r m

onitoring

bore

s w

ithin

the n

ort

hern

port

ion o

r to

the n

ort

h o

f th

e s

ite

analy

sed f

or

meth

ane in F

ebru

ary

2009.

�

Com

ple

ted

NA

Lan

dfi

ll G

as M

an

ag

em

en

t P

lan

R

ev

isio

n 0

01 M

ay 2

010

Tra

nsp

acif

ic C

lean

aw

ay T

ullam

ari

ne

P

ag

e 2

8

Lo

cati

on

A

cti

on

C

om

men

t S

tatu

s

Tim

eli

nes

Weste

rn b

oundary

In

sta

ll g

as p

robes

Tra

nspacific

Cle

anaw

ay w

ill insta

ll perim

ete

r la

ndfill

gas

bore

s a

ppro

xim

ate

ly e

ve

ry 1

00m

alo

ng w

este

rn b

oundary

of

site.

In p

rog

ress

Q4 2

010

Weste

rn a

rea o

f site (

inclu

din

g o

n-

site a

nd o

ff-s

ite)

Mon

itor

som

e g

roundw

ate

r m

onitoring b

ore

s f

or

meth

ane

Gro

undw

ate

r sam

ple

s fro

m 5

gro

undw

ate

r m

onitoring

bore

s w

ithin

the w

este

rn p

ort

ion o

r to

the w

est

of th

e s

ite

analy

sed f

or

meth

ane in F

ebru

ary

2009.

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Page 29

8.2 Facilities and Structures Monitoring In March 2010 Transpacific Cleanaway performed monitoring for the presence of methane in structures and service pits at the site. In total sixty six (66) on-site locations (including drains and pits) were monitored using a hand held multi meter unit (QRAE II) which can detect LEL%, O2, CO and H2S. None of the locations tested detected any explosive conditions. The locations tested and results are provided in Appendix H. Further monitoring of methane in structures and service pits will be conducted annually. 8.3 Installation of treatment technology Solar Flare A solar powered landfill gas flare was installed on Gas Collection Point 3 (GCP3) on mound 3 in January 2010. Specific detail regarding the flare is outlined in Section 6.2 of this report. The solar powered flare is being commissioned to ensure it is operating correctly, and additional works to date include:

• Upgrade of wind shield to improve combustion efficiency (April 2010)

• Upgrade of piping into flare to ensure sampling point prior to flare is compliant to the Australian Standard (April 2010)

Routine inspections of the landfill gas flare are undertaken at the site on a regular basis. These visual inspections and the maintenance schedule are performed as per the Tullamarine Landfill. Maintenance schedule. Landfill Gas Flare. January 2010. A copy of the maintenance schedule is attached in Appendix I. Biofilter Consultants have been commissioned to determine the feasibility of installation of a biofilter on Mound 3 of the landfill for the treatment of landfill gas. The feasibility report is expected to be completed by July 2010. Other treatment options Based on a review of outputs from modelling and the gas flow data obtained from the solar powered flare, an initial estimate of the range of the current gas flow has been made. In order to further assess this situation it is recommended the following steps be taken:

1. Extraction testing. A portable blower/ flare station should be installed and an extraction test should be performed to assess the sustainable gas flow rate and quality from Mounds 1, 2 and 3.

2. NGERS 2009 Reporting. The findings of the assessment (updated waste tonnages) and

extraction testing should be included in the NGERS 2009 report. Notation should be made for the record the site has been used for co-disposal and Transpacific considers the required methodology not appropriate.

3. Installation of Perimeter Monitoring system. See section 8.5 below for more detail.



Page 30

4. Landfill Gas Recovery/ Treatment System Design. Based on the findings of the above steps, and any future use plans for the site, the design of the landfill gas system and treatment unit may require revision.

8.4 Indirect sub-surface monitoring of methane in groundwater In February 2009 Transpacific Cleanaway undertook groundwater monitoring at locations on-site and off-site. Forty six (46) samples were analysed for methane in groundwater. Results obtained from groundwater samples collected at the site by KingTech Services Pty Ltd, and analysed by Leeder Consulting Pty Ltd indicated that very low levels of methane (<0.001mg/L to 7.2mg/L) were present in the samples. This equates to less than 0.00072%v/v soluble methane in groundwater. Based on these findings methane absorption in groundwater is not considered to be a migration pathway of concern at the site, and will not be further investigated. Results from this monitoring round are provided in Appendix J. 8.5 Perimeter migration monitoring Currently no perimeter landfill gas migration monitoring wells are installed at the site. The Risk Assessment process has identified landfill gas monitoring wells should be placed at selected locations around the perimeter of the site to determine if lateral subsurface migration of landfill gas is occurring. The plan includes:

• Install 4 wells on approximate 200 metre spacing (dependant upon access) along the eastern boundary of the site. These wells shall be placed as close to the property boundary as possible, and shall extend to the depth of the waste disposal cells.

• Install 4 wells on approximate 200 metre spacing (dependant upon access) along the northern boundary of the site. These wells shall be placed as close to the property boundary as possible, and shall extend to the depth of the waste disposal cells.

• Install 3 wells on an approximate 100 metre spacing (dependant upon access) along the western boundary of the site. These wells shall be placed as close to the property boundary as possible (outside the waste disposal area) and shall extend to a depth of the waste disposal cells.

• Install 3 wells on an approximate 300 metre spacing (dependant upon access) along the southern boundary of the site. These wells shall be placed as close to the property boundary as possible (outside the waste disposal area) and shall extend to a depth of the waste disposal cells.

• Install 1 well on the site in the vicinity of the on-site offices, and shall extend to a depth of the waste disposal cells.

The location of the proposed perimeter migration monitoring wells, and the proposed design of these wells is provided in Appendix K. Once installed the perimeter migration wells shall be monitored monthly unless a non complying probe or probes (gas quality exceeds 1 percent methane by volume) are discovered. The monitoring



Page 31

should be performed in accordance with a health and safety plan that has been prepared for this activity. Non-complying probes should then be monitored at least weekly to confirm the results. If exceedences are occurring, monitoring should continue to be undertaken on that probe or probes while corrective actions are being planned and implemented. Monitoring should continue on that probe or probes for a period of two weeks after the probe or probes has been returned to a complying condition. The monitoring will be performed in accordance with the methodology that is provided in Appendix L. The results of monitoring will be included in updates of this Landfill Gas Migration Management Plan if results from all monitoring probes return as ‘compliant’. Should a non complying probe or probe be

discovered a written report following each round of monitoring will be submitted to EPA.



Page 32

9 Contingency Plan 9.1 Monitoring If elevated levels of methane (above 1 percent methane by volume) are detected in the perimeter migration monitoring system in the vicinity of sensitive receptors, monitoring should be performed to evaluate the presence of methane at these properties and within any structures. If required, notification of any properties or to any utilities companies will occur, advising of the findings and potential for methane gas to accumulate in subsurface utilities in the vicinity of the site. As part of the monitoring program, groundwater elevations will also be monitored. If the presence of groundwater is detected in the migration monitoring wells and this level is found to be increasing, this condition may increase the potential for landfill gas to migrate from the site. If this condition arises, monitoring should also be performed to evaluate the presence of methane at these properties and within any structures. 9.2 Corrective Action Plan A detailed Corrective Action Plan will be compiled based upon the findings, and submitted to EPA. EPA will be advised on a regular basis of the status of the Corrective Action Plan.



Page 33

10 Review 10.1 Overview This Landfill Gas Migration Management Plan will be updated annually, or as required, to include additional information collected as part of actions identified within this plan, methane generation and recovery projections, as built drawings, monitoring results, review of risk assessment due to future land use, comments from EPA and or the Environmental Auditor and any other information which is relevant to this plan. This plan forms part of the Post Closure Management Plan for the site, and as per the post closure Pollution Abatement Notice is to be submitted to EPA by 30th May 2010. The plan will be implemented upon receiving written direction from EPA and then must be re-submitted to EPA after review by an Environmental Auditor by 30th December 2011. 10.2 Document Revision The table below outlines the revisions made to this document. A complete revision of the document will be accompanied by a new revision number and date in the right hand corner of all pages.

Table 9: Document Revision

Revision number

Date Nature of Revision Writer Reviewer

001 May 2010 Compilation of Landfill Gas Management Plan

TW/ MF LS, AW, GW



Page 34

FIGURES FIGURE 2: Site Location Map


Figure 2: Site Location Map

Source: Google Maps

Transpacific Cleanaway Landfill



Page 35

FIGURE 4: Site Plan


Figure 4: Site Map

Mound 3

Mound 2

Mound 1



Page 36

APPENDICIES

APPENDIX A: Pollution Abatement Notice



Page 37

APPENDIX B: Dial Before You Dig Plans

...\tullamarine\070509C.dwg 19/10/2006 12:22:09 PM

IMPORTANT : Abandoned pipes may contain asbestos cement and/or fibro cement. Special work and handling procedures to deal with these potentially hazardous materials are required. Metallic water mains and associated fittings may pose an electrocution hazard if electrical earth wires have been connected to the property service or water main. The contractor shall ensure that adequate electrical testing is carried out prior to working on these mains. If a positive reading is recorded the contractor shall cease all works and notify the relevant power distributor, the customer and YVW.

Disclaimer - The plans accompanying this letter are issued solely for asset identification purposes and should not be used for any other purpose. Yarra Valley Water provides the information it has on Sewer, Water and Recycled Water assets but does not guarantee the accuracy of information and therefore the location of all assets must be proven on site prior to the commencement of any works. Yarra Valley Water will not accept responsibility for or claims associated with any incorrect or incomplete information being contained on the plan. Due to ongoing potential asset changes this plan should not be reused at a later date, a new plan should be obtained.

The location of assets must be verified on site prior to the commencement of work. For assistance to locate assets, please phone Yarra Valley Water on 131695.

Minimum horizontal & vertical clearances (edge to edge) are required between your proposed works and Yarra Valley Water assets. Details of these minimum clearances can be obtained from Yarra Valley Water’s website: http://www.yvw.com.au/yvw/ServicesAndProducts/Publications/Standards.htm

Any conflict with the minimum clearance to your proposed works should be referred to Yarra Valley Water for further advice.

MISS MARISSA FRANCE 11/02/2010

039330039217705682

[email protected]

PRIVATE BAG 5 TULLAMARINE 3043

Existing Title Hydrant Below Ground Council Hydrant Above Ground Council Proposed Title Hydrant Below Ground - YVW Hydrant Above Ground - YVW Offset Water Main Hydrant Below – YVW/Council Dialysis Patient Water Main Fire Plug / Blank End Water Valve

Address

Melway Ref.

Date0 50 100

metres

Dial Before You Dig Sequence No.

Warning – This plan is issued solely for the purpose of assisting you in identifying Yarra Valley Water’s specified assets through further investigation only. It’s not to be used for any other purpose, including to identify any other assets, property boundaries or dimensions. Accordingly, the location of all assets should be proven by hand on site prior to the commencement of any work. (Refer to attached letter for further details.)

WESTERN AV WESTMEADOWS 3049

5D5

11/02/2010

17705682

Existing Title Circular Access Point Inspection Shaft Proposed Title Junction End of Pipe Existing Sewer Gas Check Manhole Maintenance Shaft Offset Distance Square Manhole Ventilation Change of Grade Rectangle Manhole Chambered Manhole

Address

Melway Ref.

Date0 50 100

metres




5D5

11/02/2010

17705682


Address

Melway Ref.

Date0 50 100

metres




5E5

11/02/2010

17705682


Address

Melway Ref.

Date0 50 100

metres




5F5

11/02/2010

17705682


Address

Melway Ref.

Date0 50 100

metres




5D6

11/02/2010

17705682


Address

Melway Ref.

Date0 50 100

metres




5E6

11/02/2010

17705682


Address

Melway Ref.

Date0 50 100

metres




5F6

11/02/2010

17705682



Page 38

APPENDIX C: Summary of Landfill Gas Generation Estimates


Appendix C: Summary of Landfill Gas Generation Estimates

Summary of Landfill Gas Generation Estimates

Model Run No.

Description Total Waste Quantity (tonnes)

“Lo” value (m3/Mg)

“k” value (1/yr)

Estimated LFG Generation

Rate – Entire Site 2010 (m3/hr)

Potential LFG Recovery Rate –

Entire Site @ 50% efficiency

(m3/hr)

Potential LFG Recovery Rate –

Entire Site @ 75% Efficiency 2010

(m3/hr)

1

Landgem

9,576,326

78

0.07/0.04

1,470

735

1,103



Page 39

APPENDIX D: Mound 3 Gas Collection System



Page 40

APPENDIX E: Mounds 1& 2 Gas Collection System- Technical Specifications



Page 41

APPENDIX F: Solar Powered Landfill Gas Flare

COMBUSTION EFFICIENCY AND REGULATORY COMPLIANCE OF CF-5 LANDFILL GAS FLARES

Revised: 01 OCT 04

Fluidic flares are used in many industries to safely and efficiently destroy combustible

gases that cannot be economically recovered. The quality of combustion of the CF-5 landfill gas

flare is governed by the flame stability which is a function of gas quality, flow rate and flarehead

design. Flame temperature, residence time in the combustion zone, and the amount of oxygen

available for combustion also influence combustion efficiency. Fluidic flares operating with

stable flames typically achieve combustion efficiencies greater than 98%. The patented double-

expansion design of the CF-5 flare head assures flame stability under conditions conforming to

the design specifications of the flare. This unique flare head produces very stable combustion

even in extremely windy conditions. An external windshield is not required.

Table 1 shows typical flow rates and gas conditions which conform with flare operation

standards specified at 40 CFR 60.18. Also, the CF-5 employs continuous electronic spark

ignition with a spark indicator light on the panel. Almost all modern gas appliances now employ

electronic ignition. The USEPA has determined that formal compliance with 40 CFR 60.18 at

“NSPS/EG” landfills requires addition of a thermocouple and flame pilot. Although these

components are not necessary for the function of the flare, they are available if formal

compliance with paragraph (f)(2) is required.

Generation and character of landfill gas depends on several factors which include (1) the

size, configuration, and operating conditions of the landfill; and (2) the characteristics of the

- 2 -

refuse such as moisture content, age, and composition. Typical landfill gas constituents are

methane, carbon dioxide, oxygen, nitrogen, and trace gases such as hydrogen sulfide and various

non-methane organic compounds. Methane emissions have been identified by the EPA as a large

contributor to "greenhouse gases" (18%) and landfills are one of the largest sources of methane

emissions (36%, EPA Regulations, p. 9909).

Landfill Service Corporation’s research agrees with EPA guidance at 40 CFR 60.18,

which assumes greater than 98% destruction efficiency if the BTU content of the gas is greater

than 200 BTU/SCF and the maximum exit velocity is less than 60 feet per second. Typical

landfill gas contains 500-600 BTU/SCF and the exit velocity at our recommended limit of 90

CFM is less than 5 feet per second. The CF-5 flare, when operated in accordance with LSC

recommendations, is well within the zone of flame stability defined by Pohl and Tichenor (1) and

therefore can comfortably be assumed to be greater than 98% efficient.

Flare temperatures vary significantly depending upon gas flow rate, gas quality and

ambient wind temperature and velocity. Our observations of measurements in the 900° F. to

1200°F. range represent thermocouple readings at various locations in the flame zone and under

various operating conditions. Operation with normal LFG (40-60% CH4) and in the mid- to

upper-flow rate range will produce the greatest temperatures. Low flows of gas and/or low BTU

gas will result in lower operating temperatures. The key parameter for NMOC destruction is

flame stability as described in reference (1); therefore, the CF-5 is designed to perform reliably

when operated within our recommended limitations. These limitations coincide with naturally

- 3 -

occurring point source passive LFG emissions, and, normally, the envelope can only be exceeded

by use of a blower.

The residence time of gases in the CF-5 flame zone varies according to the typical flame

height produced by different flow rates. At a low flow of 2 CFM, the flame height is only about

6 inches, and the average residence time is about 0.6 seconds; at a high flow of 90 CFM, the

flame height reaches a total of about 6 feet (5 feet above the flare tip), and the minimum

residence time is about 0.3 seconds. Thus, the lower temperature condition is balanced by a

longer residence time while the shortest residence time occurs at higher temperatures.

It is not normally possible to obtain undiluted field samples of the combustion gases from

a fluidic flare; therefore, open flares, such as the CF-5, are presumed by the regulations (see 40

CFR 60.33c) to provide 98% combustion efficiency if operated in accordance with the above-

mentioned standards.

( i )

TABLE 1

CF-5 OPERATING PARAMETERS TO CONFORM WITH 40 CFR 60.18

1) VISIBLE EMISSIONS: During a two-hour observation period, there cannot

be visible emissions (smoke) for more than five

minutes. This does not include heat waves or water

vapor.

2) BTU CONTENT OF GAS: Must be greater than 200 BTU/SCF. Landfill gas

typically contains 500 to 600 BTU/SCF.

3) MAXIMUM EXIT VELOCITY: Must be less than 60 feet per second (fps) at the

flare tip. The maximum flow rate of 90 cubic feet

per minute (cfm) would produce a calculated exit

velocity of less than 5 fps. When corrected for the

temperature increase and gas mixing occurring in

the operating flarehead, actual exit velocities remain

well below maximum. Even the raw gas inlet

velocity at the two-inch base of the flarehead is less

than 60 fps under these conditions and, therefore,

the CF-5 clearly provides much more than

minimum retention time.

4) PILOT LIGHT & PILOT

( ii )

OPERATION INDICATOR: The regulation requires either a flame-type pilot

with thermocouple to monitor the presence of the

pilot flame, or an equivalent device. Modern gas

appliances utilize electronic ignition systems rather

than flame pilots and the CF-5 incorporates this

superior technology with a panel indicator light to

verify presence of the ignition spark which is

applied continuously each 1.5 seconds regardless of

flare combustion status. USEPA has determined

that formal compliance with 40 CFR 60.18 at

“NSPS/EG” landfills subject to Subpart WWW

requires additional of a thermocouple and flame

pilot. Although these components are not necessary

for the function of the flare, they are available if

formal compliance with paragraph (f)(2) is required.

SUMMARY

The CF-5 gas vent flare is intended for use at passive landfill gas pressures with a

minimum of 30% methane. The flare is intended to operate at flow rates ranging from

2-90 SCFM at gas pressures approximately 0.5 to 5 inches of water column. When properly

equipped and operated, this unit is consistent with requirements specified at 40 CFR 60.18 and

40 CFR 60.33c.

( iii )

REFERENCES

Pohl, John H., Joannes Lee, Roy Payne and Bruce A. Tichenor. "Combustion Efficiency of

Flares." Combustion Science and Technology. Vol. 50, pp. 217-231, 1986.

U.S. Environmental Protection Agency. Air Emissions from Municipal Solid Waste Landfills -

Background Information for Proposed Standards and Guidelines. Office of Air Quality Planning

and Standards. Research Triangle Park, North Carolina. March 1991. EPA-450/3-90-011a.

Chapters 3 and 4.

U.S. Environmental Protection Agency. Standards of Performance for New Stationary Sources

and Guidelines for Control of Existing Sources: Municipal Solid Waste Landfills. Federal

Register/Vol. 61, No. 49, pgs. 9905-9944.

U.S. Environmental Protection Agency. 40 CFR 60.18, from 40 CFR. Chapter 1, pgs. 51-52.

Envirofix Erosion Control Pty Limited

Thompson Rd Carrum Downs Vic 3201

1300 783 775

www.envirofix.com.au

150 m3/hr ( 240 m3/hr

Envirofix Erosion Control Pty Limited Thompson Rd

Carrum Downs Vic 3201 1300 783 775

www.envirofix.com.au



Page 42

APPENDIX G: Certification of Management Systems

These sites are registered under Certificate No: QEC23915/CEM20544/OHS20398 issued on 6 November 2009.

Transpacific Industries Group Ltd ABN 74 101 155 220

These registrations are dependant on Transpacific Industries Group Ltd maintaining their scope of registration to ISO 9001:2008, AS/NZS ISO 14001:2004, AS/NZS ISO 4801:2001.

Registered by: SAI Globa Certi fication Services Pty Ltd (ACN 108 716 669) 286 Sussex Street Sydney NSW 2000 Australia with SAI Global Limited 286 Sussex Street Sydney NSW 2000 Australia (“SAI Global”) and subject to the SAI Global Terms and Conditions for Certification. While all due care and sk ill was exercised in carrying out this assessment, SAI Global

accepts responsibility only for proven negl igence. This certificate remains the property of S AI Global and must be returned to SA I Global upon i ts request.

To verify that this certificate is current please refer to SAI Global On-Line Certification register at http://www.saiglobal.com 4 Page 1 of 3

Trading as

Transpacific Waste Management (South West Waste) ABN 55 120 175 635 8 Wallis Road Halifax BUNBURY WA 6230 AUSTRALIA







Trading as

Transpacific Cleanaway 561 Eumundi/Noosa Road NOOSAVILLE QLD 4566 AUSTRALIA 58 Crockford Street NORTHGATE QLD 4013 AUSTRALIA 515-519 Princess Highway MORWELL VIC 3840 AUSTRALIA Western Avenue TULLAMARINE VIC 3043 AUSTRALIA MRF Collier Road BAYSWATER WA 6053 AUSTRALIA King Bay Road KARRATHA WA 6714 AUSTRALIA Lot 24 Camboon Road MALAGA WA 6090 AUSTRALIA MRF Gordon Road MANDURAH WA 6210 AUSTRALIA Unit 2 Iraci Crescent WEIPA QLD 4874 AUSTRALIA King Bay Road KARRATHA WA 6714 AUSTRALIA







Trading as

Transpacific Industries Group (NZ) Ltd Redvale Landfill Landfill Access Road DAIRY FLAT AUCKLAND NEW ZEALAND 49 McAlpine Street SOCKBURN CHIRSTCHURCH NEW ZEALAND

Registered by: SAI Global Certification Services Pty Ltd (ACN 108 716 669) 286 Suss ex Street Sydney NSW 2000 Australia with SAI Global Limited 286 Sussex Street Sydney NSW 2000 Australia (“SAI Global”) and subject to the SAI Global Terms and Condi tions for Certification. While all due care and skill was exercised in carrying out this assessment, SAI Global accepts responsibility only for proven negl igence. This certificate remains the property of S AI Global and mus t be returned to SAI Global upon its request. To verify that this certificate is current please refer to SAI Global On-Line Certi fication register at http://www .saiglobal.com

This is to certify that:


SOLID WASTE DIVISION Level 1 159 Coronation Drive MILTON QLD 4064 AUSTRALIA (Refer to Attachment to Certificate of Registration dated 6 November 2009 for additional certified sites) operates a QUALITY MANAGEMENT SYSTEM ENVIRONMENT MANAGEMENT SYSTEM OCCUPATIONAL HEALTH & SAFETY MANAGEMENT SYSTEM which complies with the requirements of ISO 9001:2008 AS/NZS ISO 14001:2004 AS/NZS 4801:2001 for the following scope The registration covers the Quality, Environmental and Safety Management Systems for Transpacific Industries Group, Solids Division for the provision of waste management services for the collection, transportation, recycling, recovery, sales and disposal of industrial, commercial, medical and municipal waste. Certificate No: QEC23915/CEM20544/OHS20398 Issued: 6 November 2009 Originally Certified: 30 June 2007 (CEM) Originally Certified: 3 November 2006 (QEC/OHS) Expires: 29 June 2010 Current Certification: 17 September 2008

Alex Ezrakhovich General Manager – Certification Services

Duncan Lilley Global Head – Assurance Services



Page 43

APPENDIX H: Facilities & Structures Monitoring

Landfill Gas Management PlanRevision 001 May 2010

Date 26/03/2010Equipment QRAE IISite Transpacific Closed landfill. Western Ave. Tullamarine

Location No. Location LEL% CO % H2S % O2 %1 Stormwater pit outside landfill administration office 0 0 0 20.92 Stormwater pit in landfill car park (northern) 0 0 0 20.93 Stormwater pit near landfill car park 0 0 0 20.94 Stormwater pit to the south of weighbridge 0 0 0 20.95 Stormwater pit on north side of weighbridge 0 0 0 20.96 Grate drain in municipal truck yard 0 0 0 20.97 Triple interceptor pit in municipal truck yard 0 0 0 20.98 Municipal division lunchroom 0 0 0 20.99 Municipal division office 0 0 0 20.9

10 Stormwater pit between Triple Interceptor pit to on-site ponds 0 0 0 20.911 On-site shed 0 0 0 20.912 Paint booth shed 0 0 0 20.913 Paint shed storage 0 0 0 20.914 Stormwater pit near leachate treatment plant 0 0 0 20.915 Concrete above ground tank (tank A) 0 0 0 20.916 Concrete above ground tank (tank B) 0 0 0 20.917 Leachate pit 0 0 0 20.918 Treatment pond A 0 0 0 20.919 Treatment pond B 0 0 0 20.920 Treatment pond C 0 0 0 20.921 Treatment pond D 0 0 0 20.922 Discharge pit between pond C and D 0 0 0 20.923 Electrical pit to east side of ponds 0 0 0 20.924 Water collection pit NE corner of site 0 0 0 20.925 Electrical pit to west of pond A 0 0 0 20.926 Landfill staff lunchroom 0 0 0 20.927 Landfill staff washroom 0 0 0 20.928 Landfill staff first aid room 0 0 0 20.929 Landfill staff amenities 0 0 0 20.930 Landfill staff storeroom 0 0 0 20.931 Truck wash pit 0 0 0 20.932 Truck wash storage room 0 0 0 20.933 Truck wash pit 0 0 0 20.9

Appendix H: Facilities and Structures Monitoring


Location No. Location LEL% CO % H2S % O2 %34 Truck wash pit 0 0 0 20.935 Truck wash pit 0 0 0 20.936 Garden shed 0 0 0 20.937 Vehicle storage area 0 0 0 20.938 Office at waste water treatment plant 0 0 0 20.939 Electrical power room at treatment ponds 0 0 0 20.940 Stormwater pit at waste water treatment plant 0 0 0 20.941 C&I Truck workshop 0 0 0 20.942 C&I Truck workshop lunchroom 0 0 0 20.943 C&I administration office 0 0 0 20.944 Stormwater pit in C&I car park (southern) 0 0 0 20.945 Stormwater pit in C&I car park 0 0 0 20.946 Stormwater pit in landfill car park (southern) 0 0 0 20.947 Stormwater pit from truck workshop 0 0 0 20.948 Stormwater pit from truck workshop 0 0 0 20.949 Triple interceptor pit from truck workshop 0 0 0 20.950 Stormwater pit opposite bin workshop 0 0 0 20.951 Stormwater pit opposite landfill staff amenities 0 0 0 20.952 Stormwater pit outside landfill administration office 0 0 0 20.953 Stormwater pit outside landfill administration office 0 0 0 20.954 Stormwater pit outside landfill administration office 0 0 0 20.955 Stormwater pit outside landfill administration office 0 0 0 20.956 Sump containing pump on landfill 0 0 0 20.957 Sump containing pump on landfill 0 0 0 20.958 Stormwater pit next to container 0 0 0 20.959 Pit containing wheel wash pump 0 0 0 20.960 Pit for wheel wash water 0 0 0 20.961 Weighbridge 0 0 0 20.962 Weighbridge sample room 0 0 0 20.963 Pit outside landfill administration office 0 0 0 1964 Pit outside landfill administration office 0 0 0 20.565 Landfill administration office 0 0 0 20.966 Pit outside landfill administration office 0 0 0 20.9

Appendix H: Facilities and Structures Monitoring



Page 44

APPENDIX I: Landfill Gas Flare Maintenance Schedule

Transpacific Cleanaway Pty Ltd

ABN 40 010 745 383

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ABN 40 010 745 383 A subsidiary of Transpacific Industries Group Ltd

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Landfill Flare Maintenance and Inspection Schedule �

Maintenance and Inspections: The regular maintenance schedule for the landfill gas flare and weekly inspection checklist is outlined below. Landfill Gas Flare Maintenance Schedule Item Activity Frequency Grass/ Firebreak Maintain short grass 20m

radius from fenced area containing flare unit

Fortnightly- if required

Firebreak Top up crushed rock within fenced area

As required

Firebreak Weeding Weekly- as required Firebreak Reduce volume of gas flowing

through flare unit On ‘strong wind days’ as defined by Bureau of Meteorology as >51km/hr winds (defined by whole trees in motion; inconvenience felt when walking against wind), or on Total Fire Ban Days.

Security Maintain fencing surrounding flare unit

As required

Flare Pipe work repair As required Flare Fan unit repair As required Flare Sparkpilot replacement Yearly or earlier if required Flare Air monitoring As per Landfill Gas Management

Plan Flare General inspection Weekly Solar panel Battery replacement As required- see checklist Solar panel Clean solar panels Weekly


ABN 40 010 745 383 A subsidiary of Transpacific Industries Group Ltd

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Landfill Gas Flare Weekly Inspection Checklist Business Unit: TCL

Site: Western Ave Tullamarine

State: Victoria

Country: Australia

Workplace Location: Person/s Undertaking inspection:

Date of this inspection: ��

/ �� Comments

Surrounds Is a fire break being maintained? (20m radius surrounding flare short grass <30mm)

Is crushed rock within fenced area adequate? Is a top up required? Is fenced area clear of weeds?

Are wind conditions satisfactory for flare to be operating at full capacity?

If winds >51km/hr (defined by whole trees in motion; inconvenience felt when walking against wind), or a Total Fire Ban Day flare is to be reduced.

Fence Check fence is locked and in satisfactory condition?

Flare unit Check guide rope

Check wind shield

Is fan operating? (Listen for fan)

Check pipelines

Is flare operating? (visual check)

Can landfill gas odour be detected? If yes report this immediately.

Does sparkpilot appear to be working? Sparkpilot replacement due January 2011

(If flare is not operating and there is a strong smell of LFG the spark pilot may not be working and may require replacement).

Solar panels Check guide ropes Are the panels charging the battery? (check readout on panel display)

Wipe down solar panels

Other: Note any other comments if required:

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Location Sample_Number Laboratory Date_Received Type Unit Analyte ResultMB55U MT137755U Leeder 3/02/2009 Water µg/L Methane 1MB55L MT137855L Leeder 3/02/2009 Water µg/L Methane 2MB17 MT137517 Leeder 3/02/2009 Water µg/L Methane 1MB56 MT137956 Leeder 4/02/2009 Water µg/L Methane 2MB15 MT137315 Leeder 4/02/2009 Water µg/L Methane 1MB57A MT137057A Leeder 4/02/2009 Water µg/L Methane 1Tulla3L MT1372 Tulla3L Leeder 5/02/2009 Water µg/L Methane 3Tulla3U MT1371 Tulla 3U Leeder 5/02/2009 Water µg/L Methane 1BH2 MT1366 BoreC Leeder 5/02/2009 Water µg/L Methane <1MB14 MT136414 Leeder 6/02/2009 Water µg/L Methane 1MB61 MT136961 Leeder 6/02/2009 Water µg/L Methane 1700MB13 MT136513 Leeder 6/02/2009 Water µg/L Methane 2MB18 MT138618 Leeder 6/02/2009 Water µg/L Methane 1600MB19 MT138719 Leeder 6/02/2009 Water µg/L Methane 2100MB58U MT139358U Leeder 10/02/2009 Water µg/L Methane 2MB16 MT137416 Leeder 11/02/2009 Water µg/L Methane 5MB60U MT138260U Leeder 11/02/2009 Water µg/L Methane 2MB60M MT138360M Leeder 11/02/2009 Water µg/L Methane 7200MB52M MT139252M Leeder 12/02/2009 Water µg/L Methane 98MB58M MT139458M Leeder 12/02/2009 Water µg/L Methane 2400MB52U MT139052U Leeder 12/02/2009 Water µg/L Methane 92MB50 MT140050 Leeder 20/02/2009 Water µg/L Methane 5MB62 MT138962 Leeder 20/02/2009 Water µg/L Methane 2MB51L MT140251L Leeder 20/02/2009 Water µg/L Methane 9MB20 MT138820 Leeder 20/02/2009 Water µg/L Methane 78MB51U MT140151U Leeder 20/02/2009 Water µg/L Methane 100MB34U MT139834U Leeder 24/02/2009 Water µg/L Methane 9MB34L MT139934L Leeder 24/02/2009 Water µg/L Methane 2MB52L MT139152L Leeder 24/02/2009 Water µg/L Methane 140MB5UR MT13965UR Leeder 25/02/2009 Water µg/L Methane 520MB5LR MT13955LR Leeder 25/02/2009 Water µg/L Methane 3MB25 MT139725 Leeder 25/02/2009 Water µg/L Methane 810MB8L MT13858L Leeder 26/02/2009 Water µg/L Methane 150MB27 MT138427 Leeder 27/02/2009 Water µg/L Methane 240MB28 MT138028 Leeder 27/02/2009 Water µg/L Methane 1MB28L MT138128L Leeder 27/02/2009 Water µg/L Methane 5MB9L MT13639L Leeder 27/02/2009 Water µg/L Methane 140MB37 MT136837 Leeder 27/02/2009 Water µg/L Methane 2500MB43 MT135343 Leeder 17/03/2009 Water µg/L Methane 26MB42 MT136042 Leeder 17/03/2009 Water µg/L Methane 640MB49U MT135549U Leeder 17/03/2009 Water µg/L Methane 500MB49L MT135649L Leeder 17/03/2009 Water µg/L Methane 220MB48U MT135748U Leeder 17/03/2009 Water µg/L Methane 1100MB6U MT13526U Leeder 17/03/2009 Water µg/L Methane 69MB38 MT135938 Leeder 17/03/2009 Water µg/L Methane 350MB48L MT135848L Leeder 23/03/2009 Water µg/L Methane 330

Appendix J: Results of methane in groundwater monitoring



Page 45

APPENDIX J: Results of methane in groundwater monitoring



Page 46

APPENDIX K: Proposed perimeter migration wells


Appendix K: Proposed perimeter migration wells

Denotes proposed location of landfill gas monitoring well



Page 47

APPENDIX L: Landfill Gas Well sampling methodology


Appendix L: Landfill Gas Well sampling methodology

Monitoring Protocol of landfill gas from landfill gas monitoring wells

Frequency of Monitoring The monitoring should be carried out monthly unless a non complying probe or probes (gas quality exceeds 1 percent methane by volume) are discovered. Non-complying probes should then be monitored at least weekly to confirm the results. If exceedances are occurring, monitoring should continue to be undertaken on that probe or probes while corrective actions are being planned and implemented. Monitoring should continue on that probe or probes for a period of two weeks after the probe or probes has been returned to a complying condition. Protocol Procedures 1. Monitoring probes are to be sealed to prevent ingress of air under all circumstances (except

when probe water elevations are being measured). 2. Best efforts will be made to perform probe sampling under conditions of falling barometric

pressure. 3. A manometer shall be attached to the probe via an airtight connection. The sampling valve on

the probe can then be opened and the pressure reading taken and recorded to an accuracy of 0.01kPa. After the sampling valve on the probe has been closed the manometer can be disconnected from the probe.

4. The gas analyser which has been completely purged following any previous sampling should be

connected to the probe via an air tight connection. The sampling valve on the probe can then be opened and the pump switched on. A purge should be performed and 10 seconds should elapse with the readings for methane, carbon dioxide or oxygen concentrations not changing by more than 0.1 percentage points. If values change more than this, then purging and continued readings shall continue until values stabilize.

5. These readings should be recorded along with the time and atmospheric barometric pressure.

The sampling valve on the probe should then be closed before the purge pump is disconnected from the probe.

6. Each gas probe shall also be checked for water elevations – after the gas monitoring has been

performed. When measurement of probe water elevations occurs, the probe cap will be removed for the minimum practical time and replaced immediately upon completion of water level measurement.

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