Cleanaway Waste Management Ltd. · ASX:CWY
Cleanaway Waste Management — Technical Presentation (January 2016)
22 slides from Cleanaway Waste Management's technical presentation, January 2016
Slide 1: Tullamarine Closed Landfill Assessments
Tullamarine Closed Landfill Moonee Ponds Creek – Surface Water Salinity Assessment Leachate Natural Attenuation Assessment Hydrogeological Assessment (In Progress) KLEINFELDER CONFIDENTIAL
Slide 2: Purpose of the Assessment
Purpose of the Assessment: Primary purpose of each assessment was to meet specific objectives; Secondary purposes were to feed the next Technical Report for Auditor Review (TRAR). KLEINFELDER CONFIDENTIAL
Slide 3: Works Undertaken by Kleinfelder
Works Undertaken by Kleinfelder: Surface Water Assessment Supervision of surface water sampling and monitoring within Moonee Ponds Creek; and Review of data to determine interaction between the landfill and Moonee Ponds Creek. Leachate Attenuation Assessment Review of current and historical groundwa
Slide 4: Moonee Ponds Creek (MPC) – Surface Water Salinity Assessment
Moonee Ponds Creek (MPC) – Surface Water Salinity Assessment Sampling and Monitoring works conducted by KingTech Services Pty Ltd (KingTech) during January 2014; Consisted of two methods: High Spatial Resolution Monitoring; Monitored across 82 transects of MPC; Readings taken from every 1.0 m of poo
Slide 5: MPC – Surface Water Salinity Assessment
MPC – Surface Water Salinity Assessment KLEINFELDER CONFIDENTIAL
Slide 6: MPC – Surface Water Salinity Assessment: Updated Conceptual Site Model
MPC – Surface Water Salinity Assessment Updated Conceptual Site Model: Localised northerly groundwater flow between the landfill and MPC has been predicted to decrease (Golder 2007 Modeling, Theil Engineering 2011); Previously reported MPC Morphology confirmed during assessment: GHD Macroinvertabrat
Slide 7: KLEINFELDER CONFIDENTIAL
Crass KLEINFELDER People, Right Solstions KLEINFELDER CONFIDENTIAL
Slide 8: MPC – High Spatial Resolution Sampling
MPC – Surface Water Salinity Assessment High Spatial Resolution Sampling Assessment of ‘Groundwater Interaction within MPC’ completed based on two criteria: 1. EC reported at or above 5,000 µS/cm; and 2. Vertical stratification of EC apparent. High spatial resolution monitoring showed groundwater in
Slide 9: Base of Creek EC – High Spatial
Base of Creek EC – High Spatial KLEINFELDER CONFIDENTIAL
Slide 10: MPC – Low Spatial Resolution Sampling
MPC – Surface Water Salinity Assessment Low Spatial Resolution Sampling Contaminants of Interest (COIs) were screened against assessment criteria provided in Golder SRA (2007) and TRAR (2011): • Barium (upstream); Cobalt (all zones); Copper (adjacent and downstream); Nickel (adjacent and downstream)
Slide 11: MPC – Conclusions
MPC – Surface Water Salinity Assessment Conclusions: Groundwater interaction with MPC is evident within each of the three Zones, however was less in downstream Zone 3; EC increases adjacent to MPC; Comparison of analytical concentrations with assessment criteria shows exceedances in all three Zones
Slide 12: Leachate Attenuation Report
Leachate Attenuation Report: Sampling and Monitoring works conducted by KingTech Services Pty Ltd (KingTech) during August 2014; Consisted of two methods: In-situ monitoring: Collection of water quality parameter from within all accessible groundwater monitoring wells at the site; Analytical Samplin
Slide 13: Flow Line 1 Flow Line 2
Flow Line 1 Flow Line 2 KLEINFELDER CONFIDENTIAL
Slide 14: Leachate Attenuation Report: Lines of Evidence
Leachate Attenuation Report: Assessment was conducted by evaluating lines of evidence: 1. Primary evidence: A comparison of historical data, to show stable or decreasing concentrations over time; and 2. Secondary evidence: A comparison of observations of bio-degradation products and reactants within
Slide 15: Leachate Attenuation Report: Mechanisms Assessed
Leachate Attenuation Report: The following mechanisms were assessed for: Petroleum Hydrocarbons – Evidence of active Terminal Electron Acceptor Processes (TEAP); and Chlorinated Hydrocarbons – Evidence of Reductive De-chlorination. The assessment was qualitative not quantitative. KLEINFELDER CONFIDE
Slide 16: Leachate Attenuation Report: Primary Evidence
Leachate Attenuation Report: Primary Evidence: Dissolved phase plumes are generally stable or decreasing; In some instances the extent may not have decreased however the concentrations have; Primary evidence was indicative of natural attenuation occurring. KLEINFELDER CONFIDENTIAL
Slide 17: Leachate Attenuation Report: Secondary Evidence
Leachate Attenuation Report: Secondary Evidence: Geochemical properties (dissolved oxygen, the oxidation or reduction potential, pH) all indicated areas of the site supportive of natural attenuation; and Review of reactants and products associated with attenuation of hydrocarbons identified oxygen,
Slide 18: Leachate Attenuation Report: Conclusions
Leachate Attenuation Report: Conclusions: There is evidence of natural attenuation occurring at the site; Monitored natural attenuation may be a viable management option for the site; Second stage attenuation assessment to provide a quantitative assessment. KLEINFELDER CONFIDENTIAL
Slide 19: Hydrogeological Assessment Report: Status Update
Hydrogeological Assessment Report: Status Update: Approaching point of completion; Has been informed by recent assessment works at the site (Practicability Assessment, Leachate Attenuation Report, updated conceptual understanding provided in additional reports); Two main objectives: Provide maximum
Slide 20: Hydrogeological Assessment Report: Maximum Leachate Levels
Hydrogeological Assessment Report: Maximum Leachate Levels: Proposed to determine levels based on the modelled changes in surrounding groundwater elevation; Modelling suggests stabilised groundwater elevation not likely to be observed until 30 years post landfill capping (2041); Proposed interim lev
Slide 21: Hydrogeological Assessment Report: Leachate Levels for LFG Extraction
Hydrogeological Assessment Report: Leachate Levels for LFG extraction: Primary consideration is to ensure gas collection systems do not become ‘flooded’ by leachate; Current LFG extraction system is considered independent of leachate level; Proposed that current management of leachate level be conti
Slide 22: Questions?
Questions? KLEINFELDER CONFIDENTIAL
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