Wambo Coal AEMR 2011-2012 - Peabody Energy
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Wambo Coal AEMR 2011-2012 - Peabody Energy

Wambo Coal AEMR 2011-2012 - Peabody Energy Wambo Coal AEMR 2011-2012 - Peabody Energy

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01.11.2014 Views

2011-2012 AEMR 3.2.2.4 Dust Deposition WCPL maintains a network of 15 dust deposition gauges, the location of each dust deposition gauge is shown in Figure 3.1. All depositional dust gauges were sampled and analysed for insoluble solids and ash residue, in accordance with AS3580.10.1:2003 Methods for Sampling and Analysis of Ambient Air and National Association of Testing Authorities (NATA) requirements. WCPL annual average impact assessment criteria for depositional dust is 4g/m 2 /month (see Table 3.5) on privately owned land. Table 3.5 Impact Assessment Criteria for Dust Pollutant Deposited Dust Averaging Period Max increase in deposited dust levels Max total deposited 7 dust levels Annual 2 g/m 2 /month 4 g/m 2 /month A summary of the annual averages for the 15 dust gauges is provided in Figure 3.11 below and a full summary of the monthly results provided in Appendix 2B. There was a capture and analysis rate of 100% for all dust gauges expect for D07 and D12. Results were not obtainable for D07 during the December 2011 exposure period due to the glass bottle and funnel missing at the time of collection. Results were not obtainable for D12 for the November 2011 exposure period as the glass bottle was broken at the time of collection. Throughout the reporting period it was noted some of the dust gauges contained various sources of foreign material including bird droppings, insects, sticks and other organic matter when analysed. Contamination was assessed based on field observations, laboratory observations, historical data and wind patterns. All monthly dust results deemed to be contaminated were excluded from the annual average. Table 3.6 compares the annual dust averages for insoluble solids, exclusive of results deemed contaminated, against previous reporting periods. There were no depositional dust gauges that exceeded the annual average criteria for insoluble solids of 4 g/m 2 /month on privately owned land (see Figure 3.11). On two occasions where the monthly result exceeded the 4g/m 2 /month criteria at D24 and D25. The monthly result exceeded the 4g/m 2 /month criteria at D24 for the October 2011 exposure period, however the sample was deemed contaminated. The monthly result exceeded the 4g/m 2 /month criteria at D25 for the March 2012 exposure period. The slightly elevated monthly result may have been influenced from south to south east winds during March 2012. Dust gauges D01 and D07 exceeded the average criteria of 4 g/m 2 /month, however these dust gauges are situated on WCPL owned land and therefore the annual average criteria of 4 g/m 2 /month does not apply. D01 is located near an internal unsealed road, used regularly during the reporting period. D01 was also located in close proximity to a number of major construction works including the Homestead Backfill Project. D07 is located near an internal unsealed road, used regularly during the reporting period. D14 was located directly west of the advancing open cut and within the footprint of the disturbance area. After the July 2011 exposure period, D14 was removed to allow land preparation activities to continue in accordance with the open cut mining operations plan. The removal of D14 has brought the total number of dust gauges in the dust monitoring network to 15. Table 3.6 Dust Recent Annual Averages (Insoluble Solids) 2009-2010 Annual Ave. g/m 2 /moth 2010-2011 Annual Ave. g/m 2 /moth 2011-2012 Annual Ave. g/m 2 /moth D01 10.4 3.6 18.1 D03 2.8 3.0 2.4 D07 5.2 6.2 4.6 D09 2.7 4.4 3.7 D11 3.3 1.8 2.2 D12 4.6 3.8 3.0 D14* 8.5 9.3 - D17 1.8 1.3 1.3 D19 3.3 2.6 2.9 D20 1.9 1.4 1.4 D21 1.5 1.1 1.4 D22 1.6 1.2 1.4 D23 3.7 2.1 2.1 D24 1.6 1.6 1.1 D25 2.3 1.7 2.2 D26 1.8 1.3 1.3 Note: Bold indicates dust gauges at privately owned residences. *D14 was removed from the dust monitoring program during the reporting period after July 2011 due to open cut activities, hence no annual average. 7 Deposited dust is assed as insoluble solids as defined by Standards Australia, 1991, AS 3580.10.1-1991: Methods for Sampling and Analysis of Ambient Air Page 46

2011-2012 AEMR Assessment criterion of a maximum increase of 2g/m 2 /month annual average for deposited dust was compared with annual average deposited dust results from the previous reporting period (see Figure 3.11a). There was one exceedance of the 2g/m 2 /month annual average increase criterion when compared with dust results from the 2010/2011 reporting period. As discussed the elevated results from D01 during the reporting period were primarily contributed to major construction works occurring close to D01 and completely within WCPL operational area. The intention of this criterion is to distinguish dust contribution by WCPL from other sources. However the speciation of WCPL dust and other sources is outside the methodology of depositional monitoring in accordance with AS3580.10.1:2003. Monthly Dust Despositional Monitoring Annaul Averages 2011-2012 Annual Average (g/m 2 /month) 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 D01 D03 D07 D09 D11 D12 D14 D17 D19 D20 D21 D22 D23 D24 D25 D26 Insoluble Solids Ash Residue Project Criteria Note: D01 & D07 are located WCPL land and therefore the annual average criteria of 4 g/m 2 /month does not apply. Figure 3.11 – 2011-2012 Depositional Dust Gauges Annual Averages Figure 3.11a – Maximum Increase in Depositional Dust between 2010/2011 to 2011/2012 Page 47

<strong>2011</strong>-<strong>2012</strong> <strong>AEMR</strong><br />

Assessment criterion of a maximum increase of<br />

2g/m 2 /month annual average for deposited dust was<br />

compared with annual average deposited dust<br />

results from the previous reporting period (see<br />

Figure 3.11a). There was one exceedance of the<br />

2g/m 2 /month annual average increase criterion<br />

when compared with dust results from the<br />

2010/<strong>2011</strong> reporting period. As discussed the<br />

elevated results from D01 during the reporting<br />

period were primarily contributed to major<br />

construction works occurring close to D01 and<br />

completely within WCPL operational area. The<br />

intention of this criterion is to distinguish dust<br />

contribution by WCPL from other sources. However<br />

the speciation of WCPL dust and other sources is<br />

outside the methodology of depositional monitoring<br />

in accordance with AS3580.10.1:2003.<br />

Monthly Dust Despositional Monitoring<br />

Annaul Averages <strong>2011</strong>-<strong>2012</strong><br />

Annual Average (g/m 2 /month)<br />

19<br />

18<br />

17<br />

16<br />

15<br />

14<br />

13<br />

12<br />

11<br />

10<br />

9<br />

8<br />

7<br />

6<br />

5<br />

4<br />

3<br />

2<br />

1<br />

0<br />

D01<br />

D03<br />

D07<br />

D09<br />

D11<br />

D12<br />

D14<br />

D17<br />

D19<br />

D20<br />

D21<br />

D22<br />

D23<br />

D24<br />

D25<br />

D26<br />

Insoluble Solids Ash Residue Project Criteria<br />

Note: D01 & D07 are located WCPL land and therefore the annual average criteria of 4 g/m 2 /month does not apply.<br />

Figure 3.11 – <strong>2011</strong>-<strong>2012</strong> Depositional Dust Gauges Annual Averages<br />

Figure 3.11a – Maximum Increase in Depositional Dust between 2010/<strong>2011</strong> to <strong>2011</strong>/<strong>2012</strong><br />

Page 47

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