WAMBO COAL PTY LIMITED MONTHLY ENVIRONMENTAL MONITORING REPORT. April 2011

Transcription

1 WAMBO COAL PTY LIMITED MONTHLY ENVIRONMENTAL MONITORING REPORT Table of Contents April INTRODUCTION METEOROLOGICAL DATA SURFACE WATER SAMPLING GROUND WATER SAMPLING DEPOSITIONAL DUST SAMPLING HIGH VOLUME AIR SAMPLING BLAST EVENTS REAL TIME AIR QUALITY MONITORING... 7

2 1.0 Introduction This report presents environmental monitoring results for the period Friday 1 April 2011 to Saturday 30 April Monitoring during this period includes meteorological measurement, surface and ground water sampling, depositional dust sampling, High Volume Air Sampling, blast events and PM10 real time air monitoring results. Real time noise monitoring results are reported in a quarterly format and can be found on the Peabody Wambo website at Meteorological Data Results for reporting period are available in Appendix A. 3.0 Surface Water Sampling Surface water samples are collected in accordance with AS/NZS :1998 Guidance on sampling from lakes, natural and man-made and AS/NZS :1998 Guidance on sampling of rivers and streams. All samples collected were analysed in the field for ph, electrical conductivity (EC) and temperature. Selected sites were analysed in a NATA 1 accredited laboratory for total suspended solids (TSS) and total dissolved solids (TDS). Results for the reporting period (Table One), recorded an EC (604 us/cm) at SW06 outside the stated criteria level. Field notes indicate that the sampling site was a very shallow pool with no surface flow in the creek which may contribute to the slightly elevated EC reading. 1 National Association of Testing Authorities - NATA is the authority that provides independent assurance of technical competence Page 1

3 Sample Location Table 1: Monthly Surface Water Results April 2011 ph EC (µs/cm) TSS (mg/l) TDS (mg/l) Oil & Grease (mg/l) Temp ( o C) Comments WOLLOMBI BROOK Wollombi Brook SW01 - Wollombi Brook Up SW03 - Wollombi Brook Pump Out , ,300 < SW02 - Wollombi Brook Down , < SW40 - Confluence with SWC NORTH WAMBO CREEK North Wambo Creek SW04 - North Wambo Creek Up Dry SW27 - North W. Creek Middle Lower Dry SW32 - North Wambo Creek Pump Dry SW05 - North Wambo Creek Down ,120 <5 1, SOUTH WAMBO/STONY CREEKS South Wambo/Stony Creek SW06 - South Wambo Creek Very shallow pool SW07 - South Wambo/Stony Creek Dry SW08 - Stony Creek < LONGFORD/DOCTOR S CREEKS SW43 - Longford Creek Up < SW44 Longford Creek Down < SW46 - Doctors Creek Up Dry SW45 Doctors Creek Down , ,640 < WATERFALL CREEK SW39 Waterfall Creek Midstream Dry MINE WATER DAMS SW11 - West Cut Dam Pipe Not pumping SW12 - West Cut Dam SW14 - Box Cut Dam (Admin) , SW15 - Eagles Nest Dam , , SW20 - Dam Adjacent to West Cut Dam , SW29 - SCB Dam , SW30 - Turkeys Nest , SW31 - Gordon Below Franklin , SW37 - Wollemi Sump , SW38 - Homestead Open Cut , SW47 - NWU Pumpout Water , SW48 - Inpit sample , SW49 - Bates Pit Pumpout , SW50 - Hunter River Water Not Pumping Hales Crossing Sump , Note: Figures in bold are outside trigger levels. 4.0 Ground Water Sampling Results for the reporting period returned three elevated EC readings for P106, P114 and P301. Depth to water readings for P6, P15, P16, P17, P18 and P20 were all slightly above maximum criteria levels for the reporting period. Page 2

4 Table 2: Ground Water Results April 2011 Sample Location Ph EC ( S/cm) Depth to Water (m) Temp ( o C) Comments GW GW P , P P P P P , P , P , P , P Collapsed P Dry GW Dry GW , GW Dry GW GW GW , GW Dry GW Dry GW20 GW20 is a vibration wire multi-piezometer installation GW Dry GW , P , P , P P Dry P No Access P No Access P , P , P , P , P , Note: all depths measured to top of casing, except United bores which are to ground. Figures in bold are outside trigger levels listed in Table 5 of the Ground Water Monitoring Programme (GWMP). 5.0 Depositional Dust Sampling Sixteen depositional dust gauges were collected for the reporting period (Table 3). All sampling and analysis is conducted in accordance with AS Determination of particulates Deposited matter Gravimetric method. All gauges were analysed for insoluble solids (IS) and ash residue (AS). Field observations include water quantity and quality, and any visible contaminants in the sample. Page 3

5 Site Insoluble Solids (IS) (g/m 2.month) Table 3: Dust Deposition Results April 2011 Ash Residue (AR) (g/m 2.month) IS:AR Ratio IS YTD Average (g/m 2.month) AR YTD Average (g/m 2.month) Depositional Dust Gauges D D D D # D # D D # D D D # D # D D # D # D D Note: Results in bold are above 4g/m 2 /month Results # are dust gauges not on WCPL owned land. DD gauges on Wambo Coal land and above criteria level are not considered non-compliance. Three dust gauges (D01, D14 and D23) recorded insoluble solids results above the annual average of 4g/m 2 during the reporting period for insoluble matter. All three of these dust gauges were observed to contain contaminants (i.e. bird droppings, insects). Insoluble solid results are reported on the annual average of 4g/m 2 /month of all uncontaminated results. 6.0 High Volume Air Sampling Four high volume air sampler (HVAS) operated at locations surrounding Wambo during the reporting period (Table 4). All units sampled total suspended particulates (TSP) over a 24- hour period on a six day cycle, in accordance with AS Determination of total suspended particulates (TSP) High volume sampler gravimetric method. Page 4

6 Table 4: HVAS Results April 2011 Date of Run HV01 Coralie TSP ( g/m 3 ) HV02 Caban TSP ( g/m 3 ) HV03 Thelander TSP ( g/m 3 ) HV04 Muller TSP ( g/m 3 ) 02/04/ /04/ /04/ /04/ /04/ Monthly Mean Yearly Mean Annual averages of all HVAS were below the criteria of 90 g/m 3. HV01 recorded an elevated reading on 02/04/2011. Monitor is located south east of operations, prevailing winds for the 24hr were from the east, south east at an average speed of 19.m/s. 7.0 Blast Events Four monitoring sites measure ground vibration and air blast overpressure for blasts conducted at Wambo Coal. Six blasts were conducted during reporting period. Monitoring at the selected four sites is conducted under the blast monitoring requirements as set out in the Wambo EPA licence (EPL 529) and DA All blasts during the reporting period were within the project criteria limits of 120dB (linear peak) for overpressure and 10mm/s for vibration for the exception of the Wambo Homestead monitor which recorded a vibration result of mm/s for the blast event on the Monday 18 April Page 5

7 Table 5: Blast Results April 2011 Date Time Kelly Residence AO728 Wambo Homestead AO722 Harris Site A6006 Muller Residence A6605 Over Pressure (db(l)) Vibration (mm/s) Over Pressure (db(l)) Vibration (mm/s) Over Pressure (db(l)) Vibration (mm/s) Over Pressure (db(l)) Vibration (mm/s) 01/04/11 15:34 <111.0 <0.22 NO <111.0 <0.22 No <111.0 <0.22 No YES 07/04/11 15:36 <111.0 <0.22 NO YES <111.0 <0.22 No <111.0 <0.22 No 08/04/11 16:00 <111.0 <0.22 NO <111.0 <0.22 NO <111.0 <0.22 NO <111.0 <0.22 NO 14/04/11 11: Yes Yes Yes <111.0 <0.22 No 18/04/11 15: Yes Yes Yes Yes 21/04/11 15:30 <111.0 <0.22 NO <111.0 <0.22 No Yes <111.0 <0.22 No Waveform Waveform Waveform Waveform Page 6

8 8.0 Real Time Air Quality Monitoring Four Real Time Tapered Element Oscillating Micobalance (TEOM) units were in operation during the reporting period (Table 6). The sites are located at Coralie (PM01), the Caban residence (PM02), Thelander residence (PM03) and the Muller residence (PM04). These units measure particulate matter less than 10 microns in diameter (PM 10 ) on a continuous basis and provide a 24 hour average result. These units operated and sampled in accordance with AS , Method for Sampling and Analysis of Ambient Air - Determination of Suspended Particulate Matter - PM 10 Continuous Direct Mass Method using a Tapered Element Oscillating Microbalance Analyser. The year to date averages at all PM10 sites were below the annual average 24hr period guideline of 30ug/m 3. Page 7

9 Date of Run PM10 24 Hour Result (ug/m 3 ) Table 6 PM10 Results April 2011 AQ01 (Coralie) AQ02 (Wambo Road) AQ03 (Thelander) AQ04 (Muller) PM10 PM10 24 PM10 24 YTD Hour YTD YTD 24 Hour Hour Average Result Average Average Result (ug/m 3 Result ) (ug/m 3 (ug/m 3 ) ) YTD Average 01/04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ Note: Results in red are greater that the 24hr period guidelines of 50ug/m 3 Results in red are greater than the annual average 24hr period guidelines of 30ug/m 3 Results in bold are between 30ug/m 3 and 50ug/m 3 - data unavailable due to instrument error Page 8

10 Appendix A Wambo Weather Station Meteorological Data Page 9

11 Meteorological Data April 2011 Date Temp (2m) Temp (10m) Temp Inversion Humidity Solar Radiation Rain mm Wind Speed Min Avg Max Min Avg Max Min Avg Max Min Avg Max Min Avg Max Min Avg Max 01/04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ /04/ , MONTH , Page 10