report landfill hotspot remediation action plan · golder issued an investigation methodology in a...

REPORT

Landfill Hotspot Remediation Action Plan Barro Sunshine Landfill

Submitted to:

Barro Group Pty Ltd 191 Drummond St

Carlton VIC 3053

Submitted by:

Golder Associates Pty Ltd

Building 7, Botanicca Corporate Park, 570 – 588 Swan Street, Richmond, Victoria 3121,

Australia

+61 3 8862 3500

1667000-178-R-Rev0

19 December 2019

19 December 2019 1667000-178-R-Rev0

i

Distribution List 1 x Barro Group Pty Ltd

19 December 2019 1667000-178-R-Rev0

ii

Table of Contents

1.0 INTRODUCTION AND BACKGROUND..................................................................................................... 1

2.0 IMMEDIATE MEASURES TO INVESTIGATE AND MANAGE WASTE HOTSPOT ................................. 2

2.1 Investigations to locate hotspots ....................................................................................................... 2

2.2 Measures to manage the Hotspot ..................................................................................................... 5

2.3 Landfill gas surface emissions .......................................................................................................... 6

3.0 CONTROL OF ODOUR AND SMOKE FROM HOTSPOT LEAVING THE SITE BOUNDARY ................. 7

3.1 Landfill operating period .................................................................................................................... 7

3.2 Site shutdown period ......................................................................................................................... 7

4.0 LEACHATE MANAGEMENT ...................................................................................................................... 7

5.0 COMMUNITY ENGAGEMENT ................................................................................................................... 8

6.0 CONTINGENCY MEASURES IF FLAMES DETECTED WITHIN OR FROM WASTE MASS .................. 8

7.0 MONITORING OF AIR QUALITY, INDICATIONS OF ODOUR AND SMOKE ........................................ 10

8.0 CONTINGENCY MEASURES IF AN INCREASE OF SMOKE, OR ODOUR EMISSIONS BEYOND THE

BOUNDARY .............................................................................................................................................. 10

9.0 STRATEGY TO ABATE HOTSPOT WITHIN THE WASTE MASS ......................................................... 11

10.0 TIMELINE OF EVENTS ............................................................................................................................ 11

11.0 IMPORTANT INFORMATION ................................................................................................................... 11

12.0 CLOSING .................................................................................................................................................. 12

TABLES

Table 1: Findings from boreholes drilled up to 14 December 2019 ..................................................................... 4

Table 2: Air Quality Testing Regime ................................................................................................................... 10

FIGURES

Figure 1: Site Drilling Map .................................................................................................................................... 3

Figure 2: Photograph of Cell 2 Leachate Sump with clay cover .......................................................................... 5

Figure 3: Photograph of Cell 5 North Leachate Sump with clay cover ................................................................. 5

Figure 4: Travel time between the site and nearest MFB station ......................................................................... 9

19 December 2019 1667000-178-R-Rev0

iii

APPENDICES

APPENDIX A Clean Up Notice

APPENDIX B Hotspot Investigation Progress Reports

APPENDIX C Hotspot Remediation Flow Chart

APPENDIX D Hotspot Investigation and Remediation Schedule

APPENDIX E Important Information

19 December 2019 1667000-178-R-Rev0

1

1.0 INTRODUCTION AND BACKGROUND

Barro Group Pty Ltd (Barro) has detected one or possibly two hotspots at their Sunshine Landfill facility

located at McIntyre Road, Kealba (the site). Localised odour and smoke indicative of a hotspot was observed

at the eastern batter of Cell 5 North and from the Cell 5 North leachate sump. Barro reported the hotspot to

the Environmental Protection Authority (EPA) Victoria on Tuesday 26 November 2019.

Barro identified the potential for air intake to the hotspot via the leachate aggregate layer constructed on the

base liner. They accordingly placed additional clay cover soils on the eastern batter of Cell 5 North and above

the leachate sump riser to restrict oxygen intake and reduce the intensity of, or perhaps smother, the hotspot.

Barro Group discussed the hotspot with Golder Associates Pty Ltd (Golder) on 26 November 2019 and we

visited the site that afternoon and again on 27 November 2019 during an EPA inspection.

The EPA issued an Inspection Report on 3 December 2019 (ref. 80021892), presenting their observations

from the site visit and indicating their intention to conduct follow up inspections on the progress of hotspot

identification and management.

On the 9 December 2019 the EPA issued a Clean Up Notice (ref. 90010782), attached in APPENDIX A.

This Report presents a Landfill Hotspot Remediation Action Plan in response to Clause 3.4 of the Clean Up

Notice. The Report addresses each item in the Clean Up Notice and includes hotspot control and monitoring

measures to be implemented during the site operational shutdown period (between 24 December 2019 and 2

January 2020). The Barro landfill manager will attend the site each day during the shutdown

19 December 2019 1667000-178-R-Rev0

2

2.0 IMMEDIATE MEASURES TO INVESTIGATE AND MANAGE WASTE HOTSPOT

2.1 Investigations to locate hotspots

Clause 3.1a of the Clean Up Notice refers to the immediate measures that shall be undertaken to investigate

the hotspot. Barro appointed Golder to undertake a field investigation to locate hotspots within the waste.

Golder issued an investigation methodology in a Technical Memorandum titled “Work Method Statement for

Hotspot Drilling Investigation, Barro Sunshine Landfill” dated 5 December 2019 (ref. 1667000-176-M-Rev0).

Investigation work commenced at the site on 5 December 2019.

The hotspot investigation methodology comprises drilling small diameter investigation boreholes into the

waste using a track mounted rotary drill rig and taking temperature and gas measurements as the borehole

advances. The aim of the investigation is to locate the hotspot core and assess their depth and aerial extent.

Investigation drilling will continue up to 20 December 2019 and resume on 14 January 2020 and then continue

until the general location of the hotspot(s) has been identified and hotspot remediation works may proceed.

Initial drilling locations were chosen based on site surface inspections and additional locations were added as

work proceeded.

Seventeen boreholes had been completed by 14 December 2019 and their locations are indicated on Figure

1. The figure also includes approximate extents of the cell boundaries at the site, existing leachate sumps

within Cell 2 and Cell 5 North, the existing Access Ramp and the New Ramp within Cell 5 North.

19 December 2019 1667000-178-R-Rev0

3

Figure 1: Site Drilling Map

Golder issue progress reports (approximately weekly) presenting the depth drilled and temperature and gas

measurements in the boreholes. Two progress reports have been issued, dated 12 December 2019

(ref. 1667000-177-M-Rev0) and 18 December 2019 (ref. 1667000-180-M-Rev0). The results indicate a

hotspot within the waste in south-east corner of Cell 5 North. High temperatures and elevated CO gas

concentrations were recorded in three boreholes (BH 12, BH131 and BH 16) in the area and steam generated

from the drilling water was also observed discharging from boreholes. The remaining boreholes indicated

maximum temperatures in the range from 25°C to 34°C in the waste and very low CO concentrations. On

completion of drilling and testing all of the boreholes were sealed using two bags of cement grout and

backfilled with clay. A summary of the borehole findings is presented in Table 1.

Cell 5 North Leachate Sump Cell 2 Leachate Sump

Cell 2

Approximate Cell Boundary

New ramp location

Existing Access Ramp

19 December 2019 1667000-178-R-Rev0

4

Table 1: Findings from boreholes drilled up to 14 December 2019

Borehole

Reference

(Golder

referenced

Borehole)

Note 4

Coordinates Surface

R.L. (m)

Depth to

Leachate

Aggregate

(m)Note 1

Terminated

Depth

(m) Note 5

Temperature

Range

Maximum

CO Gas

Reading

(ppm) Easting Northing Min

oC

Max

oC

BH01 308829.97 5820465.86 46.71 6.12 5.5 29.0 34.0 (Note 3)

BH02 308835.55 5820450.94 48.39 7.71 7.0 18.0 32.5 (Note 3)

BH03 308838.31 5820443.45 49.03 8.71 5.2 18.6 27.6 (Note 3)

BH04Note 2 308838.2 5820443.6 48.9 8.6 8.9 24.8 26.5 (Note 3)

BH05 Note 2 308834.3 5820391.7 48.3 7.76 7.2 24.2 27.0 (Note 3)

BH06 308852.58 5820423.14 48.77 7.75 6.2 21.0 25.0 (Note 3)

BH07 308840.67 5820457.98 49.56 8.97 9.0 25.0 33.2 (Note 3)

BH109

(BH08)

308820.39 5820367.88 44.41 3.12 2.50 24.2 27.2 1000+

BH111

(BH09)

308815.44 5820363.67 44.17 2.80 3.40 24.6 33.4 12

BH10 308866.87 5820420.33 47.48 7.22 2.00 27.6 27.6 38

BH11 308856.93 5820411.93 48.49 8.34 5.40 22.4 28.9 1000+

BH12 308862.88 5820423.67 47.79 7.57 3.00 90.9 90.9 1000+

BH120

(BH13)

308860.54 5820417.55 48.01 7.98 7.50 25.4 28.8 (Note 3)

BH131

(BH14)

308853.89 5820425.91 48.59 8.40 8.00 93.9 93.9 (Note 3)

BH130

(BH15)

308853.60 5820420.10 48.66 8.56 8.00 26.1 31.0 (Note 3)

BH16 308851.61 5820439.22 48.91 8.77 8.00 85.0 85.0 (Note 3)

BH17 308847.44 5820434.15 49.35 8.94 8.50 25.0 27.1 (Note 3)

Note 1: Depth to Leachate Aggregate calculated based on vertical difference between measured surface elevation and top of leachate

collection aggregate from As-Built survey.

Note 2: Coordinates, Surface R.L. and Leachate aggregate R.L. are approximate based on surrounding survey data. No survey was

undertaken at these locations at the time of investigation, location marked on site for future survey.

Note 3: GA 5000 Gas Analyser malfunction, no gas measurement applicable for drilled borehole.

19 December 2019 1667000-178-R-Rev0

5

Note 4: Some boreholes have been provided with two boreholes reference numbers where surveyor labels differ from Golder sequential

ordering of boreholes, and the Golder borehole reference has been provided within brackets within Table 1, and also shown on Figure 1.

Note 5: General notes on Terminated Depth. BH09 was drilled on an incline and as such the terminated drill depth exceeds the vertical

depth to the leachate layer (the leachate layer was not penetrated during the investigation). BH10 and BH11 experienced drill refusal at

the terminated depth and the drill investigation could not proceed further at these locations. Steam was observed discharging from BH12

at the terminated depth and hence the drill investigation did not proceed further at this location.

Copies of the investigation progress reports are presented in APPENDIX B.

2.2 Measures to manage the Hotspot

Clause 3.1b refers to measures to manage the hotspot. Barro placed low permeability clay soils over likely

hotspot locations and edges of the drainage layer in an attempt to, as far as practical, prevent air ingress to

the hotspot and smoke and odour from leaving the landfill. The Cell 2 and Cell 5 Leachate Sumps were also

temporarily covered by clay. Figure 2 and Figure 3 show photographs of clay placed over the sump outlets.

Figure 2: Photograph of Cell 2 Leachate Sump with clay cover

Figure 3: Photograph of Cell 5 North Leachate Sump with clay cover

19 December 2019 1667000-178-R-Rev0

6

2.3 Landfill gas surface emissions

In terms of Clause 3.1c Golder carried out a surface landfill gas emission survey on 12 December 2019 to

check the integrity of the landfill surface at the investigation areas and over the clay cover, including the Cell 2

and 5 North leachate sumps, on the adjacent batters and the south eastern edge of Cell 5 North. A Gazomat

Inspectra Laser was used and measured methane concentrations only. None of the measurements exceeded

criteria presented in the EPA publication “Landfill gas fugitive emissions monitoring guideline” (Number 1684

dated February 2018), for landfills with intermediate cover (average methane gas emissions below 200 ppm

and no individual result exceeding 500 ppm).

A more detailed landfill gas emissions survey was undertaken by Eurofins Environment Testing Australia Pty

Ltd (Eurofins) on 17 December 2019 as part of the site quarterly landfill gas monitoring. The survey measured

concentrations of methane, carbon dioxide, oxygen and hydrogen sulphide. The measured concentrations

were within acceptable limits. Barro has requested Eurofins to also take additional readings close to the

identified hotspot at Cell 5 North and at locations where additional clay has been placed in order to assess the

performance of site sealing works. The results of this landfill gas emissions survey will also be used to assess

where additional clay cover may be required.

19 December 2019 1667000-178-R-Rev0

7

3.0 CONTROL OF ODOUR AND SMOKE FROM HOTSPOT LEAVING THE SITE BOUNDARY

3.1 Landfill operating period

Clause 3.2 refers to measures to control odour and smoke from leaving the site. The clay cover serves to

control odour and reduce the likelihood of smoke leaving the boundary. Ongoing landfill operations are

continuing in areas remote from the hotspot investigation area.

During site operational works, the hotspot investigation area is attended by Barro staff daily to assess for

odour and visual smoke. The landfill boundary is also inspected twice daily to check for odour or smoke.

3.2 Site shutdown period

Landfill operations will be closed from 24 December 2019 to 2 January 2020 and during this period the landfill

will not accept waste. The Barro landfill manager will attend the site each day during the shutdown (including

public holidays) to assess for odour and visual signs of smoke. The manager has access to staff and

resources during this period should additional clay placement or other actions be required.

The monitoring and testing of air quality at the site, including odour and smoke, is ongoing and is discussed in

Section 7.

4.0 LEACHATE MANAGEMENT

Clause 3.1d of the Clean Up notice refers to water that may be introduced into the landfill during investigation

work or to cool a hotspot. A leachate drainage system underlies each cell at the landfill site. The system

comprises a series of lateral leachate collection pipes in a herring bone alignment connected to a main

leachate collection pipe running north to south within valleys along the floor of landfill cells. The entire cell floor

and leachate collection pipes have been covered with a minimum 300 mm thick layer of leachate aggregate

material. The main leachate collection pipes discharge to leachate sumps located within cells, including Cell 2

and Cell 5 North. Leachate within the sumps is pumped to a leachate pond at the site, located approximately

300 mm south east of Cell 5 North filling area. The leachate pond has a storage capacity of approximately

5 000 m3.

Water is introduced into the landfill during the hotspot investigation and most likely also during future hotspot

remediation works. Should large volumes of water be used most of the water is expected to collect in the

leachate drainage materials and will discharge into the sumps. Leachate water will be pumped from the

sumps and into the leachate pond. Regular water quality tests will be undertaken on samples of the leachate.

If the remedial works include the excavation of waste and relocation to a pad not on the landfill surface, a

leachate collection system will be constructed to collect runoff from the hotspot remediation work and pumped

to the leachate pond.

Barro currently manage the leachate pond capacity by the following methods:

Dust suppression across the active landfill surface.

Evaporation from the leachate pond.

Trucking to an offsite disposal location (as a contingency measure if required).

19 December 2019 1667000-178-R-Rev0

8

5.0 COMMUNITY ENGAGEMENT

Clause 3.3 refers to the development of a Community Engagement Strategy. Barro has appointed a

Community Engagement consultant to prepare a Community Engagement strategy, to co-ordinate community

engagement activities and to inform the local community of:

Measures being carried out to locate and remediate waste hotspots.

Results of air quality monitoring carried out at the site.

Contact details for a person to receive requests for information or any concerns from the community.

Barro currently present the air quality monitoring results and reports to the EPA. The results are published on

the EPA website which is accessible to the public. Barro intends to set up a website for the hotspot

remediation work which will be accessible to the community and present all monitoring test results and

reports.

The EPA held a “pop-up” meeting at a local shopping centre on Friday 13 December 2019 at which Barro

representatives were present. Barro also held a Community Meeting on Tuesday 17 December 2019 to

present information on the hotspot investigations and monitoring and to discuss any issues raised by residents

or community members. This meeting was also attended by representatives of the EPA.

6.0 CONTINGENCY MEASURES IF FLAMES DETECTED WITHIN OR FROM WASTE MASS

Clause 34c refers to contingency measures to be adopted if any flames are detected within or from the waste

hotspot. A fire water main is located around the landfill site. Should a small fire be detected on the surface of

the landfill Barro will attempt to douse the flames, cool the material and cap with clay. The Fire Authority will

be notified. If significant flames are detected Barro will immediately notify the Fire Authority and use their fire

equipment to control the flames until the Fire Authority has arrived on site.

The nearest Metropolitan Fire Brigade (MFB) station is the Sunshine Fire Station FS44 (Western District

Office), located at 30 McIntyre Sunshine North and can be contacted on 03 9665 4358. The MFB has been

made aware of the potential hotspot at the site and has inspected the site. Figure 4 shows the travel time by

car to the MFB Western District Office is approximately 5 minutes.

The St Albans Fire Station is also close to the landfill site and has previously also attended the site.

19 December 2019 1667000-178-R-Rev0

9

Figure 4: Travel time between the site and nearest MFB station

Barro will notify the MFB prior to the commencement of any hotspot remediation works and will also provide

the MFB with a copy of this Plan for information.

In the event of flames being detected at the site Barro will increase the air quality monitoring and notify local

residents through the Community Engagement process.

19 December 2019 1667000-178-R-Rev0

10

7.0 MONITORING OF AIR QUALITY, INDICATIONS OF ODOUR AND SMOKE

Air quality monitoring, as required by Clause 3.4e of the Clean Up Notice, commenced at the site on 6

December 2019. Table 2 presents the air quality testing regime which is currently implemented at the site.

Table 2: Air Quality Testing Regime

Monitoring parameter Methodology Location/s Monitoring

frequency

Monitoring start

date

TO-15 compounds Evacuated canister 2 locations:

north and west

of site

1 in 3 days 6 December 2019

Odour Field survey Boundary

perimeter

along north

and west.

Barro staff twice

daily, Golder

staff 1 in 3 days

minimum

27 November

2019

Particulate matter with an

equivalent aerodynamic

diameter less than 2.5

microns (PM2.5)

DustTrak 1 location:

north and west

boundary

Continuous 17 December

2019

CO and SO2 AreaRAE 2 locations:

north and west

of site

Continuous 17 December

2019

Gravimetric PM2.5 MicroVol sampler 2 locations:

north and west

of site

If visible smoke

is detected

Not currently

required

Results of air quality tests and reports assessing the results against relevant human health standards are

presented to the EPA within 48 hours of receipt of the results, as per Clause 3.6 of the Clean Up Notice.

Air quality sampling and testing will continue during the site operation shutdown period. The air quality

laboratory will be working reduced hours over the Christmas break and test results for the canister samples

will only be available once per week.

The monitoring frequency for TO-15 Compounds and Odour is to be increased to daily during the hotspot

remediation works. It is expected that smoke may be generated during the remediation works and Gravimetric

PM2.5 monitoring will be required during this time.

8.0 CONTINGENCY MEASURES IF AN INCREASE OF SMOKE, OR ODOUR EMISSIONS BEYOND THE BOUNDARY

Contingency measures will be implemented should there be an increase in smoke or odour emissions at the

site boundary. These measures may include adjusting the remediation works to reduce emissions and

placing clay cover to seal venting points. If visual smoke is detected at the site the monitoring frequency for

TO-15 compounds and odour will be increased to daily and Gravimetric PM2.5 testing will commence.

19 December 2019 1667000-178-R-Rev0

11

9.0 STRATEGY TO REMEDIATE A HOTSPOT WITHIN THE WASTE MASS

The strategy to remediate hotspots within the waste mass depends on the results from the hotspot

investigations. The main factors to be considered are the location, depth and the aerial extent of hotspots. A

hotspot remediation flow chart has been developed which considers evaluation of the investigation results and

selection of the remediation method. The flow chart is presented in APPENDIX C.

Considering the nature of the fill and the likely location and extent of the hotspots we consider that likely

remediation options will be to inject water into the hotspot or to excavate hotspot materials and remove them

to a laydown area of treatment. At this stage of the investigation it appears that injection of water into large

diameter auger boreholes (greater than 150 mm in diameter) will be effective and likely to produce the least

impact with respect to odour and smoke. A variation on this method will be to inject carbon dioxide or nitrogen

gas into the hotspot through the boreholes.

We note that should any excavation works require waste to be temporarily placed outside of approved waste

acceptance areas, Barro will apply for a Section 30A from the EPA prior to proceeding.

Air and water quality measurements and testing will be undertaken throughout the remediation work.

Monitoring boreholes will be drilled around each hotspot area for measurement of temperature and CO gas

concentration in the waste. Galvanised iron standpipes will be grouted into the boreholes and capped to allow

continued access. Where possible inclined boreholes will also be drilled into the remediated hotspot areas

and galvanised iron standpipes installed for measurement of temperature and gas concentrations.

Air quality monitoring at the landfill boundary will continue for a period after completion of the works. The

duration of testing will be agreed with the EPA.

10.0 TIMELINE OF EVENTS

We have developed a preliminary schedule, presented in APPENDIX D, showing a proposed timeline for the

hotspot investigation, remediation and monitoring work. The timeline is indicative as investigations are

continuing and the scope of remediation work has not yet been established.

We have used the date presented in the Clean Up Notice for issue of an EPA Compliance Report as the 29

February 2020, but note that it may be necessary for Barro to request a revision of the this date depending on

the outcome of the investigation and remediation work.

11.0 IMPORTANT INFORMATION

Your attention is drawn to the document titled – “Important Information Relating to this Report”, which is

included in APPENDIX E. The statements presented in that document are intended to inform a reader of the

report about its proper use. There are important limitations as to who can use the report and how is can be

used. It is important that a reader of the report understands and has realistic expectations about those

matters. The Important Information document does not alter the obligations Golder Associates has under the

contract between it and its client.

19 December 2019 1667000-178-R-Rev0

12

12.0 CLOSING

We anticipate that this Landfill Hotspot Remediation Action Plan may be updated in later revisions to reflect

findings from the ongoing hotspot investigation works.


Stephen Borovac Brian Wrench

Project Engineer Senior Consultant

SPB/BPW/spb

A.B.N. 64 006 107 857

Golder and the G logo are trademarks of Golder Associates Corporation

j:\civil\2016\1667000 - barro gita sunshine\correspondence out\1667000-178-r landfill hotspot remediation action plan\1667000-178-r-rev0.docx

19 December 2019 1667000-178-R-Rev0

APPENDIX A

Clean Up Notice 90010782

ENVIRONMENT PROTECTION ACT 1970 SECTION 62A

CLEAN UP NOTICE

Mr. Raymond Barro BARRO GROUP PTY LIMITED 191 DRUMMOND ST CARLTON VIC 3053

TO: BARRO GROUP PTY LIMITED ACN: 005 105 724

ADDRESS: 191 DRUMMOND ST, CARLTON VIC 3053

PREMISES: 22 SUNSHINE AV, KEALBA VIC 3021

LEGAL REFERENCE: EP Act 1970 s.62A(1) Clean up and ongoing management measures required

Who we are: Environment Protection Authority (EPA) Victoria is an independent statutory authority established under the Environment Protection Act 1970 (the EP Act). Our purpose is to protect and improve our environment by preventing harm to the environment and human health. Why we serve remedial notices: Remedial notices are served to prevent or remedy actual or likely pollution, environmental hazards and a range of non-compliances with the EP Act. What you are required to do: Section 62A(1) of the EP Act requires you to comply with the requirements in this notice with one or more actions to prevent or remedy an actual or likely non-compliance. Under section 60A(1), if someone plans to take control of your premises, you must notify them of this notice and your progress towards compliance. When you are required to act: Immediately, from the date below. If you want compliance dates extended: An application to extend a compliance date listed in Section 3 of this notice must be received at least 10 working days prior to the compliance date. Application forms, available at www.epa.vic.gov.au/business-and-industry/forms must be addressed to the Manager of the EPA office listed on this notice with the subject line: “Notice amendment application”. Your served notice remains legally binding until EPA advises of any change. Refer to the Remedial notices policy (publication 1418) for further information on amendment applications. What happens if you don't comply: If found guilty of contravening a requirement of this notice, you may be ordered to pay a fine of up to 2400 penalty units ($396,528). What your review rights are: An application for review of this notice can be made to EPA and/or the Supreme Court. Applications for an EPA review must be made within 7 calendar days from the notice issue date (below). Application forms are available at www.epa.vic.gov.au/business-and-industry/forms, or from our offices. For more information on your review rights, refer to the Remedial notice review policy (publication 1531) or contact us on 1300 EPA VIC (1300 372 842). For the purpose of this notice 'You' means the recipient of this notice and 'Premises' means the site at the premises address, as identified above.

Tim Turnbull

DELEGATE OF THE ENVIRONMENT PROTECTION AUTHORITY

09/12/2019DATE OF ISSUE:

http://www.epa.vic.gov.au/business-and-industry/forms

www.epa.vic.gov.au/business-and-industry/forms

SECTION 62A CLEAN UP NOTICE

Notice ID: 90010782 EPA Victoria T: 1300 EPA VIC (1300 372 842) E: [email protected] Page 2 of 8

NOTICE STRUCTURE

1 EPA OBSERVATIONS

This section details what was observed during the inspection.

2 REASONS FOR VIEW FORMED

This section interprets the observations and articulates why the authorised officer believes a clean up notice should be issued in accordance with section 62A of the EP Act.

3 REQUIREMENTS - WHAT OUTCOMES ARE REQUIRED TO COMPLY?

Considering the view that has been formed, this section lists the requirements or actions to address the environmental risk(s) or impact(s).

4 AN EXAMPLE OF HOW YOU CAN COMPLY

This section provides an example of how you may achieve compliance with the requirements of this notice.



1 EPA OBSERVATIONS

1.1 In response to business notification 200353201 of a landfill hotspot within an active cell, EPA Officers attended the KEALBA location, Barro Group Pty Limited at 22 Sunshine Avenue (premises) at 1355 hours on Wednesday 27 November 2019. The EPA Officers: 1.2 Observed intermittent odour outside the premises boundary, opposite 57 Sunshine Avenue KEALBA with a burnt and smoky characteristic. 1.3 Observed that the premises currently hold a licence with EPA (80195) Scheduled Categories: A05 Landfills, allowing for solid inert waste and shredded tyres to be deposited to land. 1.4 Met with the site representatives who identified themselves as the Landfill Manager. 1.5 Were informed by the Landfill Manager that smoke was observed from cell 5 North leachate sump and batter when it was reported to the EPA on 26 November 2019. 1.6 Were informed by the Landfill Manager that cell 5 North is the active cell, has been in operation for approximately 12 months and has approximately 6 to 10 metres depth of waste. 1.7 Were informed by the Landfill Manager that there was cracking of the batter and venting occurring through the leachate drainage layer on the boundary of Cell 5 North as well as more smoke from the annulus of the leachate sump in Cell 5 North but not from inside the sumps. 1.8 Were informed by the Landfill Manager that he believes the smoke is migrating through the leachate drainage system beneath the active cells. 1.9 Were informed by the Landfill Manager that no flames were sighted, only smoke and burnt and smoky odour. 1.10 Were informed by the Landfill Manager that sensitive receptors are approximately 200 metres from cell 5 North to the South-West direction. 1.11 Were informed by the Landfill Manager that cell 5 North batter was capped with approximately 1 – 1.5 metres of clay to attempt to mitigate the smoke and odour. 1.12 Were informed by the Landfill Manager that walk-over inspections are conducted daily of the landfill cells to visually check for evidence of any cracking, venting, smoke or depression of surface waste. 1.13 Were informed by the Landfill Manager that there are no other measures in place for hot spot checks. 1.14 Were informed by the Landfill Manager that hourly hot spot and odour checks have been conducted of all the cells between 5am and 9pm since the discovery of the smoke in cell 5 North. 1.15 Were informed by the Landfill Manager that the hot spot on cell 5 North was found at the earliest opportunity and reported to EPA. 1.16 Were informed by the Landfill Manager that the Risk Assessment Management Plan is currently being reviewed to include hot spot procedures and checks. 1.17 Observed the north eastern batter of cell 5 north to have a burnt and smoky odour. Noted no flames or smoke sighted at this location, wind direction was to the South. Burnt odours were noted along an area of the batter approximately 75m in length. Observed that the batter at this location was covered in clay.



1.18 Observed that the cell 5 north leachate sump at this location had been buried under clay. 1.19 Observed water suppression including fire hydrants around the boundary of cell 5 North with hoses leading to a nearby water pump. 1.20 Observed at cell 2, approximately 40 metres North of main leachate sump an area which had a burnt and smoky odour. Observed that the burning odour was restricted to half way up the batter and to the eastern side of the sump in an area of approximately 25 m2. 1.21 Observed that the leachate sump in Cell 2 was not sealed at the surface, and less than 300mm of leachate was present above the basal liner. No burning odour could be detected from the sump. 1.22 Observed that clay was being placed at the bottom of this area to try and reduce air ingress into the hotspot via the leachate drainage layer. 1.23 Observed that the batter at this location was steep and had not been rehabilitated. 1.24 Observed the wind direction to the South.



2 REASONS FOR VIEW FORMED

EPA confirmed that Barro Group Pty Limited is the occupier of the KEALBA premises, located at 22 Sunshine Avenue and holds a current licence (80196) where the licence holder operates a landfill. The licence allows for solid inert waste and shredded tyres to be deposited to land. On 26 November 2019, EPA received a business notification from Barro Group Pty Limited of waste hotspots present in cell 5 North on the premises which had resulted in a combustion event emitting smoke and odour from the surface of the landfill. On 27 November 2019, EPA Officers attended the premises and identified a burnt and smokey odour at cell 5 North and cell 2 approximately 40 metres North of the main leachate sump. That odour is consistent with being from waste hotspots in Cell 5 North that were identified during the inspection. Smoke and odour from a waste hotspot has the potential to emit hazardous Volatile Organic Compounds and particulate matter to the atmosphere. EPA has received over 45 pollution reports since 21 November 2019 from residential receptors alleging offensive odour from the premises, with 11 of these pollution reports received subsequent to the business notification of waste hotspots.

On this basis, and considering the observations previously stated, I have formed a view and I am satisfied that industrial waste or a potentially hazardous substance is being handled in a manner which is likely to cause an environmental hazard, as per section 62A(1)(d) of the EP Act.

In order to address this, you must take the clean up and ongoing management measures listed in this notice.

Rojan Manalo AUTHORISED OFFICER EPA Metropolitan West EPA Victoria

09/12/2019DATE OF ISSUE:



3 REQUIREMENTS - WHAT OUTCOMES ARE REQUIRED TO COMPLY?

General Requirements

3.1 You must immediately take measures to manage and investigate burning waste hotspots within the waste mass, including: a) Identifying the extent of each hotspot and locating the core of each hotspot; b) Sealing the site surface and penetrations through it, to prevent air ingress, as far as practicable; c) Undertaking landfill gas surface emissions surveys to confirm the site is sealed to air, as far as practicable; and d) Introducing water to the waste to cool the hotspots, or other equivalent methods approved in consultation with EPA. 3.2 You must immediately carry out air quality monitoring in order to assess the risk of harm to sensitive receptors from smoke, and indicators of odour, generated from waste hotspots at your premises. This must: a) be carried out at locations that are representative of air quality at the northern and western boundaries adjoining the nearest residential receptors; b) be carried out at a frequency not exceeding once every 3 days for the duration of waste hotspots being present at the landfill; 3.3 By 13 December 2019, you must engage a suitably qualified person to develop a Community Engagement Strategy to inform the local community of: a) Measures that are being carried out in order to abate waste hotspots at the landfill; b) A summary of the results of air quality monitoring carried out to comply with Requirement 3.2; c) A way of contacting you to raise any concerns about smoke, and odour, or seek further information on waste hotspots at your premises; 3.4 By 20 December 2019, you must develop a Landfill Hotspot Remediation Action Plan that will be implemented to abate waste hotspots at the landfill if the measures listed in Requirement 3.1 have been unsuccessful. This must include: a) Control measures so that odour and smoke from the hotspots are not emitted beyond the boundaries of the premises to the extent practicable; b) Management of leachate and wastewater generated from any abatement works; c) Contingency measures should any flames be detected within or from the waste mass; d) Notification of fire authorities; e) Monitoring of air quality, indicators of odour, and smoke; f) Contingency measures should there be an increase of smoke, or odour emissions beyond the boundary of the premises; and



g) A strategy to abate waste hotspots within the waste mass. 3.5 By 29 February 2020, you must provide EPA with an updated Risk Management Plan that incorporates a Hotspot Prevention Plan, Hotspot Reporting Plan and Hotspot Management Plan.

Reporting Requirements

3.6 You must, within 48 hours of receiving analytical results from any air quality monitoring carried out in order to comply with Requirement 3.2 provide to EPA: a) A copy of the analytical report detailing these results; and b) An assessment of these results against relevant human health standards. 3.7 By 13 December 2019, you must submit to EPA a copy of your Community Engagement Strategy prepared in accordance with Requirement 3.3. 3.8 By 20 December 2019, you must submit to EPA a copy of you Landfill Hotspot Remediation Action Plan prepared in accordance with Requirement 3.4. 3.9 By 29 February 2020, you must in writing to the authorised officer listed on page 5 of this notice, provide a report that: a) identifies how compliance with all requirements of this notice has been achieved; and b) is signed by your managing director, most senior executive, or a person authorised to speak on behalf of the notice recipient.



4 AN EXAMPLE OF HOW YOU CAN COMPLY

One way of achieving compliance with this notice would be to: REQUIREMENT 3.1 - Immediately; 4.1 Take measures to manage hotspots within the waste mass in accordance with the Landfill Licensing Guidelines (EPA Publication 1323.3 - September 2016). REQUIREMENT 3.2 - Immediately; 4.2 Carry out air monitoring for Volatile Organic Compounds, and PM2.5 particulate matter (if smoke is being generated), at the northern and western boundaries of your premises. Increase the frequency of monitoring events based on site activities, with daily frequency while intrusive works to abate the waste hotspots is occurring. REQUIREMENT 3.3 - By the due date specified; 4.3 Engage the services of a suitably qualified community engagement consultant to develop a Community Engagement Strategy for this incident. REQUIREMENT 3.4 - By the due date specified; 4.4 Engage the services of a suitably qualified environmental consultant to develop a Landfill Hotspot Remediation Action Plan in the event that waste hotspots are still present. REQUIREMENT 3.5 - By the due date specified; 4.5 Update your Risk Management Plan to incorporate the listed preventative measures in Requirement 3.5. REQUIREMENT 3.6 - By the due date specified; 4.6 Provide EPA via email to [email protected] copies of analytical reports for air quality monitoring with a summary comparing the results to relevant human health standards. REQUIREMENT 3.7 - By the due date specified; 4.7 Have your community engagement consultant prepare and submit to EPA a Community Engagement Strategy. REQUIREMENT 3.8 – By the due date specified; 4.8 Submit to EPA via an email to [email protected] a copy of your updated Landfill Hotspot Remediation Action Plan. REQUIREMENT 3.9 – By the due date specified; 4.9 Submit to EPA a report confirming that compliance with all notice requirements has been achieved and detailing the actions that were taken to achieve them.

19 December 2019 1667000-178-R-Rev0

APPENDIX B

Hotspot Investigation Progress

Reports

Golder Associates Pty Ltd Building 7, Botanicca Corporate Park, 570 – 588 Swan Street, Richmond, Victoria 3121, Australia

T: +61 3 8862 3500 F: +61 3 8862 3501

A.B.N. 64 006 107 857

Golder and the G logo are trademarks of Golder Associates Corporation golder.com


Barro Group Pty Ltd (Barro) has detected a potential hotspot(s) at their Sunshine Landfill facility located at

McIntyre Road, Kealba within the eastern batter of Cell 5 North with associated localised odour and smoke

observed at the Cell 5 North leachate sump. Barro reported the potential hotspot to EPA Victoria on Tuesday

26 November 2019.

As outlined in our deliverable dated 5 December 2019 (ref. 1667000-177-M-Rev0), Barro engaged Golder

Associates Pty Ltd (Golder) to conduct a hotspot drilling investigation to assist in identifying and assessing

hotspot locations. This technical Memorandum presents preliminary results for fieldwork conducted from 5th to

7th of December 2019.

2.0 HOTSPOT INVESTIGATION METHODOLOGY

A field engineer from Golder attended the site to undertake the hotspot drilling investigations across three

days (5th to 7th December 2019). The investigation included drilling small diameter boreholes from the access

ramp and landfill surface using a track mounted Comacchio rotary drill rig and taking temperature readings at

intervals down the borehole. The borehole locations were selected in consultation with Barro landfill staff and

the locations were surveyed by Landair Surveys Pty Ltd on the 6 December 2019.

Vertical open boreholes were drilled using a blade bit and water flushing, advancing the borehole in stages of

approximately 2-3 m in depth and drilling in casing to support the borehole sidewalls. Following casing

installation at each stage the borehole water was allowed to drain, and a temperature probe lowered into the

borehole to measure the temperature at the base of the hole. Each borehole was drilled to a target depth of

between 0.0-1.0 m above the top of the leachate aggregate layer or to a shallower depth if refusal of the

drilling bit occurred on a solid obstruction (usually concrete or steel). The Golder field engineer inspected the

boreholes as they progressed for signs of smoke and/or steam that may be indicative of the presence of a

hotspot.

3.0 FINDINGS

Across the three-day investigation, Golder drilled seven investigative boreholes labelled BH01-BH07 on the

south-eastern perimeter of Cell 5 North, at the locations shown on Figure 1. A summary of the test results is

presented in Table 1.

TECHNICAL MEMORANDUM

DATE 12 December 2019 Project No. 1667000-177-M-Rev0

TO Mr Nino Frasca, Barro Sunshine Landfill

FROM Lawrence Hanson and Brian Wrench EMAIL [email protected]

BARRO SUNSHINE LANDFILL: POTENTIAL HOTSPOT INVESTIGATION - FIRST PROGRESS REPORT FOR THE PERIOD 5TH TO 7TH DECEMBER 2019

Mr Nino Frasca Project No. 1667000-177-M-Rev0

Barro Sunshine Landfill 12 December 2019

2

Table 1: Hotspot Investigation 5th to 7th December 2019: Summary of Results

Borehole

Reference

Coordinates Surface R.L.

(m)

Depth to

Leachate

Aggregate Note 1 (m)

Terminated

Depth (m)

Temperature

Range

Easting Northing Min oC Max oC

BH01 308829.97 5820465.86 46.71 6.12 5.5 29.0 34.0

BH02 308835.55 5820450.94 48.39 7.71 7.0 18.0 32.5

BH03 308838.31 5820443.45 49.03 8.71 5.2 18.6 27.6

BH04Note 2 308838.2 5820443.6 48.9 8.6 8.9 24.8 26.5

BH05 Note 2 308834.3 5820391.7 48.3 7.76 7.2 24.2 27.0

BH06 308852.58 5820423.14 48.77 7.75 6.2 21.0 25.0

BH07 308840.67 5820457.98 49.56 8.97 9.0 25.0 33.2

Note 1: Depth to Leachate Aggregate calculated based on difference between measured surface elevation and top of leachate collection

aggregate from As-Built survey.

Note 2: Coordinates, Surface R.L. and Leachate aggregate R.L. are approximate based on surrounding survey data. No survey was

undertaken at these locations

The measured temperatures over the length of the boreholes are within the range expected in a landfill. None

of the temperature measurements indicate a hotspot in the vicinity of the boreholes.

No evidence of smoke or steam was observed during the investigation although the Golder engineer

occasionally did detect burnt smell odours during the fieldwork. The source of the odours could not be

located, however.

4.0 CLOSURE

If you have any questions about this Technical Memorandum, please contact Brian Wrench on 0415 152 456.


Dr Brian Wrench Senior Consultant

LH/BPW/

Attachment: Figure 1 Borehole Locations

\\golder.gds\gap\melbourne\jobs\civil\2016\1667000 - barro gita sunshine\correspondence out\1667000-177-m hotspot initial investigation\1667000-177-m-rev0 hotspot progress report 1.docx

5

.

0

0

0

2

.

0

0

0

1

0

.

0

0

5

.

0

0

0

(

T

Y

P

I

C

A

L

)

(

T

Y

P

I

C

A

L

)

REF: S:\216\21604\2160419\LANDAIR MEASURED\2019 12 06 BORE HOLES.DWG

SHEET: A3MGA 94ZONE 55SHEET 1 OF 1 SIZE:

JOB NUMBER:DATE OF SURVEY:FIELD PARTY:DRAWN BY:PLAN DATE:

06/12/2019DWDW9/12/2019 REVISION: A

LENGTHS ARE IN METRES

SCALE

1:5000 5 10 15 20 25

2160419THE BARRO GROUP

BORE HOLES

SHUNSHINE LANDFILL

KEALBA

308841.70 5820400.48 48.77 7.75

BH100 308835.68 5820390.28 47.97 7.34

BH108 308828.11 5820385.00 44.24 3.98

BH109 308820.39 5820367.88 44.41 3.12

BH110 308817.76 5820465.42 44.06 2.66

BH111 308815.44 5820363.67 44.17 2.80

CO-ORDINATES

Reference East North Elevation Cut To Base

BHO1 308828.86 5820466.58 46.71 6.12

BH1O8 308833.58 5820457.98 47.61 7.15

BHO2 308835.55 5820450.94 48.39 7.71

BHO3 308838.31 5820443.45 49.03 8.71

BH1O4 308845.24 5820433.71 49.08 8.84

BH1O6 308852.58 5820426.60 48.70 8.24

BHO7 308840.67 5820423.14 49.56 8.97

LEVELS ARE TO AUSTRALIAN HEIGHT DATUM (AHD) VIDE VRS

NOTE

All DISTANCES QUOTED ARE GROUND DISTANCES AND DIFFER FROM SLOPE DISTANCE

BACKGROUND IMAGE IS FOR REFERENCE ONLY

BH04* 308839.2 5820442.6 48.9 8.6

BH05* 308834.3 5820391.7 48.3 7.67

BHO6

* ARE NOT MEASURED, APROX COORDINATES ONLY


Building 7, Botanicca Corporate Park, 570 – 588 Swan Street, Richmond, Victoria 3121, Australia

T: +61 3 8862 3500 F: +61 3 8862 3501

A.B.N. 64 006 107 857

Golder and the G logo are trademarks of Golder Associates Corporation golder.com


Barro Group Pty Ltd (Barro) has detected a potential hotspot(s) at their Sunshine Landfill facility located at

McIntyre Road, Kealba within the eastern batter of Cell 5 North with associated localised odour and smoke

observed at the Cell 5 North leachate sump. Barro reported the potential hotspot to EPA Victoria on Tuesday

26 November 2019.

As outlined in our deliverable dated 5 December 2019 (ref. 1667000-176-M-Rev0), Barro engaged Golder

Associates Pty Ltd (Golder) to conduct a hotspot drilling investigation to assist in identifying and assessing

hotspot locations. An initial progress report was developed for fieldwork conducted from the 5th to 7th of

December 2019 and preliminary results were presented in our technical memorandum dated 12 December

2019 (ref. 1667000-177-M-Rev0). This technical Memorandum represents a second progress report and

includes results for fieldwork conducted from the 12th to 14th of December 2019.

2.0 HOTSPOT INVESTIGATION METHODOLOGY

A field engineer from Golder attended the site to undertake the hotspot drilling investigations across three

days (12th to 14th December 2019). The investigation included drilling small diameter boreholes from the

access ramp and landfill surface using a track mounted Hanjin rotary drill rig and taking temperature and gas

measurements at intervals down the borehole. The borehole locations were selected in consultation with

Barro landfill staff and the locations were surveyed by Landair Surveys Pty Ltd on the 6 December 2019 and

on 13 December 2019.

Vertical open boreholes were drilled using a blade bit and water flushing, advancing the borehole in stages of

approximately 2-3 m in depth and drilling in casing to support the borehole sidewalls. Following casing

installation at each stage the borehole water drained, and a probe lowered to measure the temperature at the

base of the hole. A gas measurement was also taken in each borehole to measure the concentration of

carbon monoxide (CO) gas, if present. We note that the gas analyser used could measure a maximum gas

concentration of up to 1000 parts per millions (ppm). Each borehole was drilled to a target depth of between

0.0-1.0 m above the top of the leachate aggregate layer or to a shallower depth if refusal of the drilling bit

occurred on a solid obstruction (usually concrete or steel). The Golder field engineer inspected the boreholes

as they progressed for signs of smoke and/or steam that may be indicative of the presence of a hotspot.

3.0 FINDINGS

TECHNICAL MEMORANDUM

DATE 18 December 2019 Project No. 1667000-180-M-Rev0

TO Mr Nino Frasca, Barro Sunshine Landfill

CC

FROM Brian Wrench EMAIL [email protected]

BARRO SUNSHINE LANDFILL: POTENTIAL HOTSPOT INVESTIGATION – SECOND PROGRESS REPORT FOR THE PERIOD 12TH TO 14TH DECEMBER 2019



2

Fron 12 to 14 December ten boreholes labelled BH08-BH17 were completed on the south-eastern perimeter

of Cell 5 North and to the south west of Cell 5 North leachate sump. The boreholes locations are shown on

Figure 1. A summary of the test results is presented in Table 1. We note that Table 1 also includes boreholes

labelled BH01-BH07 that were drilled from 5 to 7 December 2019 are discussed in the first progress report.

The measured temperatures within boreholes BH12, BH14 and BH16 all exceed those expected in the landfill.

Steam was visually observed discharging from the boreholes at these locations and a burnt odour was also

present. A high carbon monoxide measurement was also recorded at BH12 (the gas analyser was not

functioning during the drilling of BH14 and BH16). We note that all these three boreholes are all within close

proximity to each other. The results indicate that a hotspot may be present beneath the surface in this area.

All other boreholes experienced temperatures that were within the range expected for the landfill.



3

Table 1: Hotspot Investigation Summary of Results

Borehole

Reference

(Golder referenced

Borehole) Note 4


(m)

Depth to

Leachate

Aggregate Note

1 (m)

Terminated

Depth (m) Note

5

Temperature Range Maximum CO Gas

Reading (PPM)


BH01 308829.97 5820465.86 46.71 6.12 5.5 29.0 34.0 (Note 3)

BH02 308835.55 5820450.94 48.39 7.71 7.0 18.0 32.5 Note 3)

BH03 308838.31 5820443.45 49.03 8.71 5.2 18.6 27.6 (Note 3)

BH04Note 2 308838.2 5820443.6 48.9 8.6 8.9 24.8 26.5 (Note 3)

BH05 Note 2 308834.3 5820391.7 48.3 7.76 7.2 24.2 27.0 (Note 3)

BH06 308852.58 5820423.14 48.77 7.75 6.2 21.0 25.0 (Note 3)

BH07 308840.67 5820457.98 49.56 8.97 9.0 25.0 33.2 (Note 3)

BH109 (BH08) 308820.39 5820367.88 44.41 3.12 2.50 24.2 27.2 1000+

BH111 (BH09) 308815.44 5820363.67 44.17 2.80 3.40 24.6 33.4 12

BH10 308866.87 5820420.33 47.48 7.22 2.00 27.6 27.6 38

BH11 308856.93 5820411.93 48.49 8.34 5.40 22.4 28.9 1000+

BH12 308862.88 5820423.67 47.79 7.57 3.00 90.9 90.9 1000+

BH120 (BH13) 308860.54 5820417.55 48.01 7.98 7.50 25.4 28.8 (Note 3)

BH131 308853.89 5820425.91 48.59 8.40 8.00 93.9 93.9 (Note 3)



4

Borehole

Reference

(Golder referenced

Borehole) Note 4


(m)

Depth to

Leachate

Aggregate Note

1 (m)

Terminated

Depth (m) Note

5

Temperature Range Maximum CO Gas

Reading (PPM)


(BH14)

BH130 (BH15) 308853.60 5820420.10 48.66 8.56 8.00 26.1 31.0 (Note 3)

BH16 308851.615 5820439.227 48.91 8.77 8.00 85.0 85.0 (Note 3)

BH17 308847.449 5820434.151 49.35 8.94 8.50 25.0 27.1 (Note 3)

Note 1: Depth to Leachate Aggregate calculated based on vertical difference between measured surface elevation and top of leachate collection aggregate from As-Built survey.

Note 2: Coordinates, Surface R.L. and Leachate aggregate R.L. are approximate based on surrounding survey data. No survey was undertaken at these locations at the time of investigation, location marked

on site for future survey.

Note 3: GA 5000 Gas Analyser malfunction, no gas measurement applicable for drilled borehole.

Note 4: Some boreholes have been provided with two boreholes reference numbers where surveyor labels differ from Golder sequential ordering of boreholes, and as such the Golder borehole reference has

been provided within brackets within Table 1, and also shown on Figure 1.

Note 5: General notes on Terminated Depth: BH09 was drilled on an incline and as such the terminated drill depth exceeds the vertical depth to the leachate layer (the leachate layer was not penetrated

during the investigation). BH10 and BH11 experienced drill refusal at the terminated depth and the drill investigation could not proceed further at these locations. Steam was observed discharging from BH12

at the terminated depth and hence the drill investigation did not proceed further at this location.



5

4.0 CLOSURE

If you have any questions about this Technical Memorandum, please contact Brian Wrench on 0415 152 456.

Dr Brian Wrench Senior Consultant

LH-SPB/BPW/spb

Attachment: Figure 1 Borehole Locations

\\golder.gds\gap\melbourne\jobs\civil\2016\1667000 - barro gita sunshine\correspondence out\1667000-180-m hotspot investigation progress report 2\1667000-180-m-rev0 hotspot progress report 2.docx

19 December 2019 1667000-178-R-Rev0

APPENDIX C

Hotspot Abatement Strategy Flow

Chart

19 December 2019 1667000-178-R-Rev0

APPENDIX D

Hotspot Investigation and

Abatement Schedule

Task Start Date End Date 06‐Dec‐19 20‐Dec‐19 3‐Jan‐20 17‐Jan‐20 31‐Jan‐20 14‐Feb‐20 Mar‐20 Apr‐20 May‐20

Barro Hotspot Identification 26‐Nov‐19 26‐Nov‐1926‐Nov‐19

Barro reported to EPA 26‐Nov‐19 26‐Nov‐1926‐Nov‐19

Control of odour and smoke at the site (clay install)* 26‐Nov‐19 20‐Feb‐19**

EPA site inpection with Barro and Golder 27‐Nov‐19 27‐Nov‐1927‐Nov‐19

Barro Air Quality Monitoring* 6‐Dec‐19 Ongoing

Community Engagement Meeting 13‐Dec‐19 Ongoing 13‐Dec‐201917‐Dec‐2019

Hotspot Investigation Drilling** 5‐Dec‐19 31‐Jan‐19*

Issue of Community Engagement Strategy 13‐Dec‐19 13‐Dec‐19

Issue of Landfill Hotspot Remediation Action Plan 20‐Dec‐19 20‐Dec‐19 13‐Dec‐201920‐Dec‐2019

Hotspot Remediation Works** 24‐Jan‐19* 20‐Feb‐19**

Issue of Compliance Report*** 20‐Feb‐19** 20‐Feb‐19**20‐Dec‐19

Temperature Monitoring of Waste Hotspot Locations* 20‐Feb‐19** Ongoing

NOTES:

*Monitoring to progress for a period of a least 3 months passed the date of Issue of EPA Compliance Report, afterwhich the requirement for monitoring will be reassessed

**Dates for conclusion of Hotspot Investigation Drilling and commencement of Hotspot Remediation\ Works subject to results of hotspot investigation

***Dates for conclution of Hotspot Remediation Works and Issue of EPA Compliance Report are subject to results of hotspot investigation and performance of hotspot abatement works

Indicative Timeline for Hotspot Investigation and Remediation

19 December 2019 1667000-178-R-Rev0

APPENDIX E

Important Information

GOLDER ASSOCIATES PTY LTD

IMPORTANT INFORMATION RELATING TO THIS REPORT

Error! Unknown document property name. Page 1 of 1 GAP Form No. LEG04 RL2

5/2018

The document (“Report”) to which this page is attached and which this page forms a part of, has been issued

by Golder Associates Pty Ltd (“Golder”) subject to the important limitations and other qualifications set out below.

This Report constitutes or is part of services (“Services”) provided by Golder to its client (“Client”) under and subject

to a contract between Golder and its Client (“Contract”). The contents of this page are not intended to and do not

alter Golder’s obligations (including any limits on those obligations) to its Client under the Contract.

This Report is provided for use solely by Golder’s Client and persons acting on the Client’s behalf, such as its

professional advisers. Golder is responsible only to its Client for this Report. Golder has no responsibility to any other

person who relies or makes decisions based upon this Report or who makes any other use of this Report. Golder

accepts no responsibility for any loss or damage suffered by any person other than its Client as a result of any

reliance upon any part of this Report, decisions made based upon this Report or any other use of it.

This Report has been prepared in the context of the circumstances and purposes referred to in, or derived from,

the Contract and Golder accepts no responsibility for use of the Report, in whole or in part, in any other context

or circumstance or for any other purpose.

The scope of Golder’s Services and the period of time they relate to are determined by the Contract and are subject to restrictions and limitations set out in the Contract. If a service or other work is not expressly referred to in this Report, do not assume that it has been provided or performed. If a matter is not addressed in this Report, do not assume that any determination has been made by Golder in regards to it.

At any location relevant to the Services conditions may exist which were not detected by Golder, in particular due to

the specific scope of the investigation Golder has been engaged to undertake. Conditions can only be verified at the

exact location of any tests undertaken. Variations in conditions may occur between tested locations and there may

be conditions which have not been revealed by the investigation and which have not therefore been taken into account

in this Report.

Golder accepts no responsibility for and makes no representation as to the accuracy or completeness of the

information provided to it by or on behalf of the Client or sourced from any third party. Golder has assumed that such

information is correct unless otherwise stated and no responsibility is accepted by Golder for incomplete or

inaccurate data supplied by its Client or any other person for whom Golder is not responsible. Golder has not taken

account of matters that may have existed when the Report was prepared but which were only later disclosed to

Golder.

Having regard to the matters referred to in the previous paragraphs on this page in particular, carrying out the

Services has allowed Golder to form no more than an opinion as to the actual conditions at any relevant location.

That opinion is necessarily constrained by the extent of the information collected by Golder or otherwise made

available to Golder. Further, the passage of time may affect the accuracy, applicability or usefulness of the opinions,

assessments or other information in this Report. This Report is based upon the information and other circumstances

that existed and were known to Golder when the Services were performed and this Report was prepared.

Golder has not considered the effect of any possible future developments including physical changes to any

relevant location or changes to any laws or regulations relevant to such location.

Where permitted by the Contract, Golder may have retained subconsultants affiliated with Golder to provide some or all of the Services. However, it is Golder which remains solely responsible for the Services and there is no legal recourse against any of Golder’s affiliated companies or the employees, officers or directors of any of them.

By date, or revision, the Report supersedes any prior report or other document issued by Golder dealing with any

matter that is addressed in the Report.

Any uncertainty as to the extent to which this Report can be used or relied upon in any respect should be

referred to Golder for clarification

golder.com

report landfill hotspot remediation action plan · golder issued an investigation methodology in a...

Documents