AGL Energy Limited · ASX:AGL
AGL Energy — Technical Presentation (May 2014)
35 slides from AGL Energy's technical presentation, May 7, 2014
Slide 1: AGL Fugitive Methane Emissions Monitoring Program
AGL Fugitive Methane Emissions Monitoring Program JUSTINE FIRTH 7 MAY 2014
Slide 2: Overview
Overview Why are we monitoring for fugitive emissions? Monitoring program for the Camden Gas Project (CGP) Equipment Results Conclusion 2
Slide 3: Purpose of study
Purpose of study Address community concerns: o What are the methane levels in Macarthur region? o Are the levels a health issue? o Is AGL a significant source of fugitive methane emissions? AGL’s social responsibility Baseline methane levels in background locations 3
Slide 4: Characteristics of Methane
Characteristics of Methane Constitutes ~90-95% CSG from CGP (~3-5% carbon dioxide, 3- 5% nitrogen, ~1% oxygen) Greenhouse Gas (latest figures report a 28 times greater contribution over 100 years compared to CO2 (IPCC AR5, 2013)) 4 IPCC AR5 (2013)
Slide 5: Methane Overview
Methane Overview No significant health criteria in NSW or Internationally: o 500,000ppm based on asphyxiation o 50,000ppm based on explosivity (LEL) o 1,000ppm occupational exposure criterion, based on 8-hour working day Naturally occurring e.g. coal seams, wetlands, permafrost, termite activity
Slide 6: Picarro Instrument
Picarro Instrument PRP Condition U4.2 : Investigation of Best Management Practices and Monitoring Techniques A number of techniques and equipment types were investigated Picarro analyser was considered the most suitable for the field monitoring as it: o Laboratory Grade Instrumentation o Can b
Slide 7: 13C Isotopic Signature
'18C Isotopic Signature 0.25 4 Fraction jo} a | AGL Gas Well Samples Fraction [o) a | Landfil Pacific Environment Isotopic ratio (%c) Consulting * Technologies * Monitoring * Toxicology Limited
Slide 8: Equipment
Equipment Mobile configuration o Toyota Landcruiser o Picarro analyser o GPS o Weather station 1-second measurements o methane concentration o 13C Isotopic ratio o Wind speed o Wind direction o Latitude/longitude 8
Slide 9: Equipment
Equipment Power supplied through Toyota Landcruiser Troop Carrier Sample line fixed to bull bar Review of data near real-time Instrumentation calibrated 9
Slide 10: Monitoring Program
Monitoring Program 12 week monitoring program o Commenced 29 April 2013 o Sites selected in consultation with the community o 25 sites visited over two days each week o 15-minutes at each monitoring site o Changing days and times of week o Night monitoring 25 monitoring locations o 20 selected s
Slide 11: Methane Monitoring Locations
N CATHERINE FIELD A. ( ( coperrty Site 23 \ a ‘ - J Site 24 RABY HARRINGTON PARK KIRKHAM NARELLAN 4 MT ANNAN? GRASMERE aie fue CAMDEN / A one ne ge { stte7@ = site9 site 6 ¥ a Site 11 Pe fat f Mes i. esite 13 CAMDEN a PARK GLEN ALPINE site 4 site 15, a a a pineaRVALE ‘site 16 ‘ie, ROSEMEADOW } MENAN
Slide 12: Methane Monitoring Locations
CATHERINE FIELD COBBITTY s ~ J Site 24 HARRINGTON PAR KIRKHAM NARELU MT ANNAN ANgMERE CAMDEN _ GLEN ALPINE site 4 Site 14 4 ve ANBARVALE ROSEMEADOW MENANGLE PARK sites a Site 17 pe s Legend Site 3 = iene en at ‘A. Sites 1-20 (within the Camden Gas Project) /OLLONDILLY) A Sites 21-25 (Background loca
Slide 13: Reference Samples
Reference Samples Need to characterise isotopic signature of other methane sources in Macarthur area Reference samples for methane isotopic signature o AGL CSG o Landfill • Fresh • Placed • Capped o Soil Mix o Livestock o Sewage 13
Slide 14: Reference Samples
Reference Samples Samples showed a range in isotopic ratio values Isotopic readings overlap between source groups At lower methane concentrations (as measured in the field) there is more variability (or noise) in the readings This is because at ambient concentration (global average 1.8ppm) t
Slide 15: Results - Overview
Results - Overview 75 hours of 1-second interval methane data was measured over the 12 weeks Over the 12 week monitoring program the average methane concentration was 2.1ppm. This is just above the global background average of ~1.8ppm and in line with urban values ranging between 1.8– 3.0ppm T
Slide 16: Summary of 15-minute data by site
Summary of 15-minute data by site Monitoring site Average Minimum Maximum Site 1 2.1 1.8 3.3 Site 2 2.0 1.8 2.9 Site 3 1.9 1.7 2.6 Site 4 1.9 1.7 2.8 Site 5 1.8 1.7 2.2 Site 6 2.0 1.7 2.5 Site 7 2.0 1.8 2.7 Site 8 2.0 1.7 2.9 Site 9 2.4 1.7 4.2 Site 10 2.1 1.8 3.5 Site 11 3.8 1.8 16.6 Site 12 2.0 1.
Slide 17: 15-minute average methane concentration across monitoring program
15-minute average methane concentration across 12 week monitoring program 17
Slide 18: 15-minute average methane concentration across monitoring program
15-minute average methane concentration across 12 week monitoring program 18
Slide 19: Results - Meteorology
Results - Meteorology Meteorology has an influence on Lower levels measured in methane concentrations afternoon or on windy days Temperature inversions can lead Diurnal variations in methane to elevated measurements concentrations Source: http://pollutionfree.files.wordpress.com 19
Slide 20: Results – Diurnal variation
Results – Diurnal variation 20
Slide 21: Results Week 11 – Night Monitoring
Results Week 11 – Night Monitoring 21
Slide 22: Results 13C isotopic ratio
Results C isotopic ratio 13 Given the low concentrations measured, difficult to make strong conclusions around much of the 13C isotopic ratio data No significant difference in 13C isotopic ratio between background and CGP sites 13C isotopic ratio measured as part of this study were found to be
Slide 23: Site 11 and Site 17 methane and isotopic ratio
jee CH, CH, global background ——6'C-CH, aam™mAGL 6'°C-CH, range N oO a Isotopic ratio (%o) Methane concentration (ppm) Nn wo * 10:43 10:44 10:45 10:46 10:47 10:48 10:49 10:50 10:51 10:52 10:53 10:54 10:55 10:56 10:57 Site 17 + Week 8 Isotopic ratio (%e) Methane concentration (ppm) K 15:54 15:55 15:5
Slide 24: Results - 13C isotopic ratio
Results - C isotopic ratio 13 24
Slide 25: Conclusion
Conclusion 12 week monitoring campaign for Camden Gas Project. This study is considered to represent an indicative screening analysis of the current conditions in the vicinity of the Camden Gas Project. Methodology and Technical Report reviewed by CSIRO. Over the 12 week monitoring program t
Slide 26: Thank You
Thank You Acknowledgements: CSIRO 26
Slide 27: Q&A
Q&A 27 Pacific Environment Consulting * Technologies * Monitoring * Toxicology Limited =
Slide 28: Results - Sites
Results - Sites 11 sites in close proximity (<300m) from AGL well Further analysis on upwind sources completed At most site the origin of fugitive emission was not discernable due to variability of the wind direction Site 7 Week 11 showed directional component, review of 13C isotopic ratio i
Slide 29: Results - Landuse
Results - Landuse Contributions from agriculture relatively small during study period Methane concentrations varied according to landuse: o Urban – mean of 2.2ppm o Rural – mean of 2.0ppm Statistical difference established 29
Slide 30: Results – Methane Concentration
Results – Methane Concentration 30
Slide 31: Results – Background vs CGP Sites
Results – Background vs CGP Sites The combined site average methane concentration over 12 weeks: o Sites1 – 20: 2.1ppm o Sites 21 - 25: 2.0ppm Statistical analysis used on data to determine if there is a significant difference in CGP (Sites 1 – 20) and Background sites (Sites 21 – 25) Methane
Slide 32: Why the Concern?
Why the Concern? Health (Community) Leak detection (Industry) Baseline Evaluation Greenhouse Gas Quantification Howarth et al, 2011 (Cornell University) Carbon emissions for coal and gas under various scenarios (CSIRO, after Cathies et al, 2012) 32
Slide 33: x Igfage lainaKnight Mey
“e x Igfage © 2013 SinclainaKnight Mey ©2013 Google” es ‘ Image© 2013:DigitalGlobe. = © 2013:CnesiSpouilmage - Pacific Environment Limited — Consulting * Technologies * Monitoring * Toxicology
Slide 34: Vertical Measurement of Concentration and Methane Flux
Vertical Measurement of Spatial Distribution of Concentration Concentration and Met Methane Flux Gaussian Plume (mass per unit time) Formula 34
Slide 35: Something Provocative..
Something Provocative.. If you care about the environment, shouldn’t you care about CSG? 35