Bengalla Mining Company Pty Limited Particulate Matter Control Best Practice Implementation Monitoring Programs U3. Wheel Generated Dust U4. Disturbing and Handling Overburden Under Adverse Weather Conditions 2013 Revision Date Description Author Reviewer Approved 0 30/05/13 New Monitoring Program to meet EPL 6538 PRP requirement. C Leech BMC A Harburg BMC J.Danny BMC
TABLE OF CONTENTS Introduction... 3 1.0 Background... 3 2.0 Bengalla Mine Company Pollution Reduction Program (U3)... 8 2.0 Particulate Matter Control Best Practice Implementation Monitoring Program Wheel Generated Dust... 8 2.1 Parameters to be monitored... 8 2.2 Methods to be used to monitor each parameter... 8 2.2.1 Moisture and silt content... 8 2.2.2 Frequency, duration rate and quantity of watering applied to haul roads... 8 2.2.3 Vehicle Kilometres Travelled (VKT)... 9 2.2.4 Haul truck weight... 9 2.2.5 Haul truck speed... 9 2.2.6 Dust levels on roads... 9 2.2.6.1 Subjective visual assessment of dust levels using visual triggers.... 9 2.3 Locations where each parameter will be monitored... 10 2.4 Frequency at which each parameter will be monitored... 11 2.5 Key Performance Indicators that will be used to determine compliance with Condition U3.1. 12 2.5.1 A detailed justification for each Key Performance Indicator selected... 12 3.0 Bengalla Mine Company Pollution Reduction Program (U4)... 13 3.0 Particulate Matter Control Best Practice Implementation Disturbing and Handling Overburden under Adverse Weather Conditions... 13 3.1 Parameters to be monitored... 13 3.2 Methods to be used to monitor each parameter... 13 3.2.1 Metrological conditions... 13 3.2.2 Operational Activities... 14 3.2.3 Dust levels... 15 3.3 Locations where each parameter will be monitored... 15 1
Figure 4 Location of E BAM Real Time Monitoring Units, Inversion Towers and Meteorological Station... 15 3.4 Frequency at which each parameter will be monitored... 16 3.5 The way in which changes to operational activities will be documented... 16 3.6 Key Performance Indicators that will be used to determine compliance with Condition U4.1. 16 3.7 Detailed justification for each parameter and Key Performance Indicator selected... 16 4.0 References... 18 LIST OF TABLES Table 1 BMC Meteorological Station parameters... 14 Table 2 Meteorological Station parameters showing unit of measurement and frequency... 16 LIST OF FIGURES Figure 1 Location and site plan of Bengalla Mine... 7 Figure 2 Monitoring Locations... 11 Figure 3 Variability in rainfall at BMC for each season... 11 Figure 4 Location of E BAM Real Time Monitoring Units, Inversion Towers and Meteorological Station... 15 APPENDICES Appendix A: Monitoring Methods 2
Introduction 1.0 Background Bengalla Mining Company Pty Ltd (BMC) operates the Bengalla Coal Mine in the Upper Hunter Valley of New South Wales; approximately 130 kilometres north-west of Newcastle and 4 kilometres west of Muswellbrook (Figure 1). The Bengalla Mine operation is generally bound by Wybong Road to the north, Overton Road to the east, the Muswellbrook to Ulan Rail Line and the Hunter River Floodplain to the south and Roxburgh Road to the west. BMC was granted a development consent (Development Application, DA, 211/93) by the then Minister for Urban Affairs and Planning in August under section 101 of the Environmental Planning and Assessment Act 1979 for the construction and operation of a surface coal mine and associated facilities in 1995. In 1996 Bengalla was approved to operate for a 21 year period and to produce up to 8.7 Million tonnes per annum (Mtpa) of Run of Mine (ROM) coal. Bengalla commenced operations in October 1998 and since approval, the Bengalla development consent has been modified four times providing for an increase in the maximum extraction rate of up to 10.7 Mtpa of ROM coal. The four modifications included; an increase in the maximum height of the overburden dump to RL 270 metres, an extension of the coal extraction footprint by 32 hectares (ha) in the south (Wantana Extension Area), construction of the remaining section of Bengalla Link Road and the implementation of an Overburden Emplacement Area (OEA) Strategy. As per the Protection of the Environment Operations Act 1997, BMC is required to hold an Environmental Protection Licence (EPL number 6538). This licence is administered by the Office of Environment and Heritage (OEH). A study into preventing and minimising particulate matter from coal mining operations was commissioned in 2010 by the Office of Environment and Heritage. The study was completed by Katestone Environmental Pty Ltd and the result was the development of the NSW Coal Mining Benchmarking Study: International Best Practice Measures to Prevent and/or Minimise Emissions of Particulate Matter from Coal Mining (Katestone 2011) report. A conclusion of the study was that substantial reductions in particulate matter emissions from coal mines in NSW could be achieved if best practice measures were applied. One key recommendation of this study is as follows: Require. existing coal mines to conduct site specific BMP determinations to identify the most technically and economically feasible options to reduce emissions.. For existing Premises the BMP determination could be required through a pollution reduction program (PRP) and the outcomes implemented through EPL conditions. BMC was issued with notice amending EPL 6538 on 8 August 2011 which was made to include a Pollution Reduction Program on the licence. The licence changes required BMC to follow a four step assessment process as per Condition U2 Coal Mine Particulate Matter Control Best Practice: 1. Estimate baseline emissions and determine the four mining activities that currently generate the most particulate matter; 2. Estimate the reduction in emissions that could be achieved by applying best practice measures; 3
3. Assess the practicability of each of these measures; and 4. Propose a timetable for the implementation of any practical measures. The BMC Best Practice Management Determination which covered these four areas was finalised in February 2012. In 2012 stage one of the ACARP project C20023 Improvements of haul dust road dust estimation and control at coal mines was completed. Stage two of the project commenced in November 2012. Stage two aims to provide a scientifically robust haul road particulate level assessment method using mobile emission monitoring. The findings from stage two should be available in 2014. On 21 March 2013, BMC was issued with notice amending EPL 6538 to include three new Pollution Reduction Programs (PRP) as follows: 1. Particulate Matter Control Best Practise Implementation Wheel Generated Dust 2. Particulate Matter Control Best Practice Implementation Disturbing and Handing Overburden under Adverse Weather conditions 3. Particulate Matter Control Best Practice Implementation Trial of Best Practice Measures for Disturbing and Handling Overburden PRP 1 and 2 require the development of monitoring programs whilst PRP 3 requires a report to be completed on a trial of best practice measures for disturbing and handling overburden by August 2014. These two PRP s requiring monitoring programs are contained in this document. The EPA Environmental Protection Licence requirements are as follows: U3 The Particulate Matter Control Best Practice Implementation Wheel Generated Dust U3.1 The Licensee must achieve and maintain a dust control efficiency of 80% or more on all active haul roads by 22 March 2013 Control efficiency is calculated as: CE= E (uncontrolled) - (controlled) x 100 (uncontrolled) Where E = the emission rate of the activity U3.2 The Licensee must prepare a Monitoring Program to assess its compliance with Condition U3.1 under varying meteorological conditions. The monitoring program must detail the: - Parameters to be monitored; - Methods to be used to monitor each parameter; - Locations where each parameter will be monitored - Frequency at which each parameter will be monitored - Key Performance Indicators that will be used to determine compliance with Conditions U3.1; and 4
- A detailed justification for each Key Performance Indicator selected. As a guide, the EPA anticipates that the following parameters will be monitored: - moisture and silt content of haul roads - frequency, duration, rate and quantity of water applied to haul roads; - frequency, duration, rate and quantity of suppressant applied to haul roads in comparison to manufactures specifications; - vehicle kilometres travelled - haul truck weight - haul truck speed; and - dust levels on haul roads. The monitoring program must be submitted by the licensee to the Environment Protection Authority Regional Manager Hunter, at PO Box 488G, Newcastle by 31 May 2013. The EPA intends to require the Licensee to implement the Monitoring Program once it is approved by the EPA. U3.3 The Licensee must submit a written report to the EPA providing the results of the Monitoring Program. The report must include an assessment of the dust control effectiveness, dust levels and the Licensee s compliance with Condition U3.1. The report must be submitted by the Licensee to the Environment Protection Authority Regional Manager Hunter, at PO Box 488G, Newcastle by 15 August 2014. U4 Particulate Matter Control Best Practice Implementation Disturbing and Handling Overburden under Adverse Weather Conditions U4.1 The Licensee must alter or cease the use of equipment on overburden and the loading and dumping of overburden during adverse weather conditions to minimise the generation of particulate matter from 22 March 2013. U4.2 The licensee must prepare a monitoring program to assess its compliance with condition U4.1. The monitoring program must detail the following: - parameters to be monitored; - methods to be used to monitor each parameter; - locations where each parameter will be monitored; - frequency at which each parameter will be monitor; - way in which changes to operational activities will be documented; - Key Performance Indicators that will be used to determine compliance with Condition U4.1; and - Detailed justification for each parameter and Key Performance Indicator selected. As a guide, the EPA anticipates that the following parameters will be monitored: - Wind speed and direction; 5
- Temperature; - Rainfall/humidity; - Evaporation rate; - Solar radiation; - Operational activities; and - Dust levels The monitoring program must be submitted by the Licensee to the Environmental Protection Authority Regional Manager Hunter, at PO Box 488G, NEWCASTLE by 31 May 2013. The EPA intends to require the licensee to implement the monitoring program once it is approved by the EPA. U4.3 The Licensee must submit a written report to the EPA providing the results of the Monitoring Program. The report must detail the following: - Weather conditions during which activities were altered or ceased - Changes made to operational activities as a result of adverse weather; and - Resultant dust levels when activities were altered or ceased. The report must be submitted by the Licensee to the Environmental Protection Authority Regional Manager Hunter, at PO Box 488G, NEWCASTLE by 15 August 2014. 6
Figure 1 Location and site plan of Bengalla Mine 7
2.0 Bengalla Mine Company Pollution Reduction Program (U3) 2.0 Particulate Matter Control Best Practice Implementation Monitoring Program - Wheel Generated Dust 2.1 Parameters to be monitored To determine Bengalla s control efficiency for wheel generated dust the following parameters will be monitored: Moisture; Silt content; Frequency, duration, rate and quantity of water applied to haul roads; Vehicle Kilometres Travelled (VKT); Haul truck weight; Haul truck speed; and Dust levels on haul roads; 2.2 Methods to be used to monitor each parameter The methods to be used at Bengalla to monitor each parameter will be predominately based on methods that were developed and used in the document BMC Best Practice Management Determination 2012. These methods have been selected to allow for consistency in approach to ongoing monitoring and due to the methods being proven in application to calculating control efficiency. 2.2.1 Moisture and silt content Sample collection for moisture and silt content will be carried out as per the USA EPA AP42 Procedure, Procedure for Sampling Surface/Bulk Dust Loading Samples (July 1993). As per the procedure, a grab sample is collected of in situ material. The sample will be analysed by a laboratory to determine percentage of silt and moisture content. This procedure is taken from USAEPA (1993) AP42 Emission Factor Database, Appendix C.1. The silt content value (%) will be used in the Unpaved Roads emission equation taken form the USEPA AP42 Chapter 13.2.2 Unpaved Roads (November 2006) to calculate emission (E) rates. The emission equation can be found in Appendix A.1. The moisture content value (%) measured will be compared with the control efficiency using the moisture ratio M (surface moisture content of water road divided by the surface water content of unpaved road (13.2.2-11) as per the AP42 Chapter 13.2.2 Unpaved Roads (2006) shown in Appendix A.2. 2.2.2 Frequency, duration rate and quantity of watering applied to haul roads The frequency, duration rate and quantity of water applied to haul roads will be monitored as per the method used for haul road dust control efficiency estimation in the BMC Best Practice Management Determination (2012). The method is based on the empirical model of Cowerd et.al (1998) and will allow for the average control efficiency of watering to be determined (refer to Appendix A.3). The number of haul truck passes on a given section of haul road (hourly average daytime traffic) will be determined by the use of the BMC Modular monitoring system. Fleet vehicles at BMC are fitted with GPS tracking (can be dot traced) and this will allow for determining route and distance travelled by haul trucks and water carts. 8
The duration rate of water applied to haul roads will be determined based on an average of time between applications. The water carts at Bengalla obtain water from two water fill points. Bengalla has four water carts (Two Euclid R90 s and Two Caterpillar 777 s). The four water carts used for the haul roads alternate between two fill points, the Run of Mine (ROM) water fill point, located adjacent to the ROM Hopper and the West Fill Point, located adjacent to the rejects bin. The volume of water from these fill point will be obtained directly via BMC s Scada system. The flow meter rates (ML per day or month) from the water fill points on site will be used to determine quantity of water being applied to haul roads. Additional information will be used to determine the water cart control efficiency including rainfall (data from BMC Meteorological Station and Bureau of Meteorology Jerry Plains Station) and evaporation rate (Bureau of Meteorology Jerry Plains Station). This information will provide the number of rain days and will also be used to determine the moisture deficit rate. To determine water cart control efficiency, the model developed in the BMC Best Practice Management Determination (2012) will be used. The model will be correlated to the control efficiency which is determined by the use of the emission estimation method. The model is shown in Appendix A.3. 2.2.3 Vehicle Kilometres Travelled (VKT) The Vehicle s Kilometre Travelled (VKT) is collected by the BMC modular monitoring system. The VKT is retrieved from the modular system and entered into the Bengalla Control Efficiency Database (BCED) to determine the area of water cart use. 2.2.4 Haul truck weight The Haul truck weight is collected by the BMC modular monitoring system. The haul truck weight is then entered into the BCED. 2.2.5 Haul truck speed The haul truck speed is collected by the BMC modular monitoring system. The Haul truck speed is then entered into the BCED. 2.2.6 Dust levels on roads Dust levels on roads are determined by subjective visual monitoring. Emissions will be calculated using the emissions estimation technique. 2.2.6.1 Subjective visual assessment of dust levels using visual triggers. Employees at Bengalla currently undertake visual assessment during each shift. Throughout each round of the monitoring period, visual assessment using a visual trigger will be used to subjectively assess dust levels at the time. The visual trigger used will be as per the Coal & Allied Dust Management, Mobile Equipment procedure (CAN-10-EWI-SITE-E2-004) which is as follows: Where wheel generated dust is visible at half the wheel height of heavy haul vehicles, additional dust suppression measures must be considered; 9
Wheel generated dust consistently visible above wheel height of heavy haul vehicles is unacceptable. These visual triggers align with the visual trigger assessments in the Upper Hunter Valley Open Cut Coal Mine Interim Dust Assessment Handbook (EPA 2011). 2.3 Locations where each parameter will be monitored During May 2013, a snapshot of haul road showed that there was 17km of active roads and 16 km s of inactive haul roads (a total of 33km of haul roads). Based on haul road activity variation per shift, monitoring locations will be established at areas of high use, and where use will remain constant. As per Bengalla Mining Company 2013-2015 MOP, westward mining activity will result in changes to the network of inactive and active haul roads. Locations for monitoring have been chosen based on limited changes to the location. These locations may change due to westward progression of the pit within the monitoring period however representative samples to determine emission rate would be collected and locations added to the monitoring location map. The major parameters as shown below will be monitored at the locations shown on Figure 2. Moisture; Silt content; Frequency, duration, rate and quantity of water applied to haul roads; Vehicle Kilometres Travelled (VKT); Haul truck weight; Haul truck speed; and Dust levels on haul roads; Controlled and uncontrolled samples will be carried out at the following monitoring locations (Figure 2). The four locations shown in figure two are 1, 1c 4,4c. The numbering and letter define each monitoring location point as either 1 (uncontrolled) or 1c, where the letter c means a control (watering) is carried out. The locations were chosen in line with the USEPA AP42 Procedure for Sampling Surface/Bulk dust loading (shown in Appendix A.4). 10
4c 4 1c 1 2c 2 3 3c Figure 2 Monitoring Locations Sampling sites will be assessed for safe access at each round of monitoring. A risk assessment will be used to determine the risk of sampling on the day of monitoring. The assessment will allow Health, Safety and Environmental factors to be addressed prior to undertaken any monitoring work. 2.4 Frequency at which each parameter will be monitored Meteorological data (rainfall, windspeed and air temperature) from the Bengalla Meteorological station show strong trends in seasonal variation. To demonstrate control efficiency throughout the variable season s, four (4) rounds (each round including four locations) of sampling will be conducted throughout a period of 12 months. It is proposed that monitoring would commence in July 2013 and stop on June 2014. The monitoring periods would coincide with each season being; winter (June to August), spring (September to November), summer (December to February) and autumn (March to May). The variability in rainfall for each season is shown in Figure 3 below. Figure 3 Variability in rainfall at BMC for each season 11
2.5 Key Performance Indicators that will be used to determine compliance with Condition U3.1 The key performance indicators that would be used to determine compliance with condition U3.1 The licencee must achieve and maintain a dust control efficiency of 80% or more on all active haul roads, are as follows: Water usages from watering fill points (Ml) Dust level assessment (visual assessments) 2.5.1 A detailed justification for each Key Performance Indicator selected Each of the key performance indicators (KPI) were selected due to practicality and applicability. A KPI based on the volume of water usages from site watering fill points directly links to the empirical calculated control efficiency. The water volume obtained from the ROM/West fill points can be compared to a known volume which provides a high percentage of control efficiency. To ensure that the required control efficiency is being achieved between the proposed seasonal sampling events, the following will be conducted and used in the application of the KPI: Following the first round of sampling the water applied (Ml) to achieve a control efficiency of 80% will be used as the water usage target for water carts; The water usage for haul road dust suppression will be monitored and tracked on a weekly basis. The monthly average of the water application will also be tracked and the control efficiency trends will be assessed between each seasonal period; and An increase in water application will be made as required in response to how control efficiency is tracking. A KPI based on visible (subjective) dust Levels is to be used. The number of times water carts required on roads could be assessed and compared to number of times water carts are not required during a sampling round. This allows for determining adequacy of watercart availability and application during the daytime. During the night, lighting sets, the dragline and all HME throughout the mine operation provide sufficient light for the assessment of dust generation. Throughout the night shift of each monitoring round, the number of water carts used will be recorded by Dispatch Control. Observations of visual conditions including the number of times water carts are required will be recorded and tracked. 12
3.0 Bengalla Mine Company Pollution Reduction Program (U4) 3.0 Particulate Matter Control Best Practice Implementation Disturbing and Handling Overburden under Adverse Weather Conditions Bengalla overburden removal is completed by both truck and shovel and dragline operations. As per Bengalla Air Quality and Greenhouse Gas Management Plan (2012), operational controls are in place to minimise the generation of visible dust during operation. Adverse weather conditions: In relation to dust impact, adverse weather conditions can be defined as any weather condition giving rise to particulate concentrations measured in excess of regulatory criteria. Bengalla will use real time air quality and meteorological monitoring to determine when adverse weather conditions exist. A trigger to alarm Dispatch and the OCE is to be established for when an hourly wind speed of 10m/s is recorded. The 10m/s trigger is to be established by July 2013. The RTEMS has been set up to inform Dispatch and the OCE when particulate matter (PM 10 ) is in excess of regulatory criteria and when the wind direction is in the arc of the mine to the monitor. The RTEMS Dispatch alarms prompt a visual assessment to be carried out by the OCE or mine personnel to determine the level of visible dust and any sources of dust in relation to the monitor location. If the level of visible dust observed is unacceptable and sources determined to be mining equipment, action is taken and a modification to operations is made. Where modifications are made, this information is logged for the equipment using the Modular monitoring system. To meet the requirements of U4 Particulate Matter Control Best Practice Implementation - Disturbing and Handling Overburden under Adverse Weather Conditions Bengalla will utilise the existing systems, procedures and operational controls currently in place. 3.1 Parameters to be monitored To monitor how equipment is altered during adverse weather conditions, the following parameters will be monitored. Wind speed and direction; Temperature; Rainfall; Relative humidity; Evaporation rate; Solar radiation; Operational activities; and Dust levels 3.2 Methods to be used to monitor each parameter 3.2.1 Metrological conditions Methods to monitor the meteorological parameters (air temperature, wind direction, wind speed, rainfall, relative humidity, solar radiation) will be the use of the Bengalla Meteorological station. The monitoring unit is located at Overton Road (Figure 4) and is used 13
to meet condition 24 of BMC s development consent (DA211/93) and condition M8 of the Environmental Protection Licence 6538. The evaporation rate will be obtained from evaporation records from the Bureau of Meteorology Jerry Plains Station. The meteorological station monitors the parameters shown in table 1. The parameters are collected at different frequency prior to being relayed to the Bengalla Real Time Environmental Monitoring System (RTEMS) via radio telemetry. Table 1 BMC Meteorological Station parameters Parameter Units of measurement Frequency Air temperature C Continuous Wind direction Continuous Wind speed m/sec Continuous Rainfall mm Daily Relative Humidity % Daily Solar Radiation W/m 2 Daily The Bengalla Meteorological Station is sited, operated and monitored in accordance with the requirements provided in Approved Methods for Sampling and Analysis of Air Pollutants in New South Wales (DEC 2007), which nominates Australian Standard (AS) 2922-1987 (Ambient Air Guide to the Siting of Sampling Units) and Methods AM-1, AM-2 and AM-4 to be followed (BMC 2010). To achieve best practice environmental management, BMC also operates an inversion tower which is linked to the RTEMS. The inversion tower is equipped with temperature sensors at 10, 20, 40, 60 and 90 metres and wind speed and direction sensors at 10, 20, 40 and 90 metres. This information is utilised for management purposes to enhance and/or clarify data from the Bengalla Meteorological Station (BMC Environmental Monitoring Program 2010). 3.2.2 Operational Activities During adverse conditions any equipment modifications are reported through to the Dispatch Control room. MinVu is a reporting tool used at Bengalla to retrieve information from Modular and provide logical summaries on specific aspects of mining operations. A MinVu report showing the time, date and time period of modified operations is used to monitor activities during adverse conditions. This information is collated into the BCED. When the average hourly wind speed exceeds 10m/s, any operations producing excessive dust within the pit may be modified. A MinVu report showing time and date and time period of modified operations is used to monitor activities during adverse conditions. This information is collated into the BCED. Parameters to be monitored for operational activities will include: Equipment type Equipment modification 14
3.2.3 Dust levels During adverse weather conditions visual assessment on operational equipment in reference to a visual trigger will be undertaken. Bengalla also uses four E-Bam monitors (Figure 4) which are linked to the RTEMS and provide continuous measurements of PM 10. The monitors are used as a proactive management tool and go beyond the requirements of regulatory requirements. The monitors are set up to alarm when wind direction and PM 10 levels are within set criteria. The monitors will be used in conjunction with the meteorological station data at time of adverse weather to determine changes in levels of PM 10. 3.3 Locations where each parameter will be monitored The meteorological parameters (Wind speed and direction, temperature, rainfall, relative humidity, evaporation rate, solar radiation) will be monitored from the Overton Road Meteorological station (Figure 5). Operational activities will be logged at BMC via the Modular monitoring system to record and track equipment modifications made due to adverse conditions. Figure 4 Location of E BAM Real Time Monitoring Units, Inversion Towers and Meteorological Station 15
3.4 Frequency at which each parameter will be monitored Meteorological conditions will be monitored as shown as follows: Table 2 Meteorological Station parameters showing unit of measurement and frequency Parameter Units of measurement Frequency Air temperature C Continuous Wind direction Continuous Wind speed m/sec Continuous Rainfall mm Daily Relative Humidity % Daily Solar Radiation W/m 2 Daily Evaporation* * mm Daily average *Evaporation will be based on evaporation records for Jerry Plains from the Bureau of Meteorology The RTEMS will be used providing a large scale view of changes to PM 10 levels associated with modified operations: before adverse weather conditions during adverse weather conditions following alarms to dispatch following equipment modification due to adverse conditions 3.5 The way in which changes to operational activities will be documented Changes to operational activities are logged in Modular. The operational activities data from Modular are recorded in the BCED. The meteorological conditions from the RTEMS and changes in dust levels are included in the BCED for the period at which operations are modified due to adverse weather conditions. 3.6 Key Performance Indicators that will be used to determine compliance with Condition U4.1; Response to air quality or wind triggers 3.7 Detailed justification for each parameter and Key Performance Indicator selected The following parameters were selected for monitoring: Wind speed and direction; Temperature; Rainfall; Relative humidity; Evaporation rate; Solar radiation; Operational activities including equipment type and equipment modifications; and Dust levels. 16
Meteorological condition parameters were selected based on findings from the BMC BMP Determination (2012) and the Katestone Report (2011). Both these studies included in-depth literature review of Best Practice Management to minimise dust generation. The factors which influence the extent of emissions from overburden handling include dry and windy conditions (BMC BMP Determination 2012). To determine dry and windy conditions in relation to overburden management a combination of meteorological conditions have been selected. The operational activities including equipment type and equipment modification have been selected. BMC utilises the RTEMS and Modular monitoring system to assist in the management of operations and the parameters selected are tracked and monitored. The equipment type parameter was selected as it allows for knowing what machinery is operating, where the machinery is operating and how this could contribute to dust generation. The Modular monitoring system at BMC allows logging to determine the duration of delayed production due to environmental conditions. The delay period due to equipment modification during adverse weather conditions was selected due to its applicability to the monitoring program. The dust level parameter was selected to provide quantifiable information relating to adverse conditions. The following KPI were selected for the monitoring program: Response to air quality or wind triggers The response to air quality or wind triggers is used to monitor the operational response to potentially adverse conditions. 17
4.0 References Bengalla Mining Company (2010) Environmental Monitoring Program. Bengalla Mining Company (2012) Coal Mine Particulate Matter Best Practice Management Determination Bengalla Mining Company (2012a) Coal Mine Particulate Matter Best Practice Management Determination, Appendix C Coal & Allied (2010) Dust Management, Mobile Equipment procedure (CNA-10-EWI- SITE-E2-004). EPA (2011) Upper Hunter Valley Open Cut Coal Mine Interim Dust Assessment Handbook EPA (2013) Bengalla Mining Company PTY LIMITED Environmental Protection Licence 6538 Katestone Environmental (2011) NSW Coal Mining Study: International Best Practice Measures to Prevent and/or Minimise Emissions of Particulate Matter from Coal Mining USEPA (2006) AP42 Emission Factor Database, Chapter 13.2.2 Unpaved Roads. USA EPA (1993) AP42 Procedure, Procedure for Sampling Surface/Bulk Dust Loading Samples (July 1993) 18