Dust Management Plan for Australian Mine Sites

How to Write a Dust Management Plan for an Australian Mine Site

A Dust Management Plan (DMP) is the document that connects regulatory obligations to operational practice. It identifies the dust sources on your site, assesses the risks they present, specifies the engineering controls that manage those risks, defines the monitoring programme that verifies performance, and establishes the trigger action response framework that escalates management when controls are not achieving the required outcomes.

In theory, every mine site has one. In practice, many are inadequate. Queensland’s Resources Safety and Health inspectorate conducted a programme of RS20 audits across 25 surface coal mines and found that inadequate dust management plans, together with non-conforming cabin ventilation systems and absent RPE programmes, represented approximately 60% of all corrective actions issued. Every site received at least one corrective action. The audits revealed that risk management processes applied to dust control were inadequate, sites lacked DMPs that satisfied the requirements of RS20, and training on the purpose and content of the DMP was insufficient.

The message is clear: a DMP that exists on paper but does not drive daily operational practice is a compliance liability, not a compliance tool. This guide covers the eight essential components of a dust management plan that satisfies regulatory requirements across Australian jurisdictions and — more importantly — actually works on the ground.

Component 1: Regulatory Context and Applicable Standards

The DMP must identify the specific legislation, regulations, recognised standards, environmental authority conditions and workplace exposure standards that apply to the operation. This is not a generic reference to ‘relevant legislation’ — it must be site-specific.

For a Queensland coal mine, this includes the Coal Mining Safety and Health Act 1999, the Coal Mining Safety and Health Regulation 2017, Recognised Standard 14 (monitoring respirable dust), Recognised Standard 15 (underground respirable dust control), Recognised Standard 20 (dust management on surface coal mines), and the conditions of the site’s Environmental Authority. For a Queensland mineral mine or quarry, QGL02 applies. For any NSW mine, the WHS (Mines and Petroleum Sites) Regulation, plus the Chapter 8A crystalline silica provisions effective from 1 September 2024, plus the site’s conditions of consent and environmental protection licence. For WA, the mine’s environmental licence under the Environmental Protection Act 1986.

The DMP must also reference the current national workplace exposure standards: 0.05 mg/m³ for respirable crystalline silica (with the proposed reduction to 0.025 mg/m³ and reclassification as a WEL from 1 December 2026), 1.5 mg/m³ for respirable coal dust, and 0.1 mg/m³ for diesel particulate matter in NSW. Record the date each standard was last reviewed and note upcoming changes that will affect the DMP’s control strategy.

Component 2: Dust Source Inventory and Characterisation

The DMP must contain a comprehensive inventory of every significant dust source on the site. This is not a list of generic categories — it must identify the specific sources, their locations, the generation mechanisms, the material being processed or exposed, and the potential for each source to contribute to both occupational exposure and ambient (boundary) dust levels.

A thorough dust source inventory for a typical surface mining operation would include: haul roads (specifying total length, traffic volume, surface material and current treatment), stockpiles (ore, coal, waste, topsoil — each identified separately with area, material type and wind exposure), ROM pads and crusher feeds, primary, secondary and tertiary crushers, screens and conveyor transfer points, drilling and blasting areas, hardstands and workshop areas, cleared land and exposed batters, tailings and waste storage facilities, and any mobile plant or processing equipment.

Each source should be characterised for its crystalline silica content (percentage by weight, determined by laboratory analysis), dust generation rate (estimated or measured), the population exposed (number and proximity of workers), and the proximity to the site boundary and sensitive receptors (residences, waterways, ecological areas).

Example dust source inventory structure

Component 3: Risk Assessment and Similar Exposure Groups

The DMP must document a formal risk assessment for each dust source, using the site’s safety and health management system risk framework. The assessment considers the likelihood and consequence of dust exposure exceeding the applicable workplace exposure standard, and the likelihood and consequence of ambient dust exceeding site boundary limits.

Similar Exposure Groups (SEGs) must be established for personal exposure monitoring. A SEG is a group of workers who are expected to have a similar exposure profile because they perform similar tasks in similar locations under similar conditions. RS14 requires SEGs to be established by a competent person (certified occupational hygienist or equivalent) and the adequacy of the SEG structure to be reviewed periodically. Typical SEGs for a surface mine include haul truck operators, drill operators, crusher/screen operators, loader operators, blast crew, workshop personnel, and administrative/office workers.

The risk assessment must also identify the conditions under which dust risk escalates — high-wind events, dry weather periods, increased production rates, equipment failures, or changes to the mine plan that expose new dust sources. These conditions feed directly into the TARP framework (Component 6).

Component 4: Engineering Controls — The Core of the DMP

This is the section that translates the risk assessment into operational practice. For each dust source identified in the inventory, the DMP must specify the engineering controls that will be applied, the performance standard each control is expected to achieve, and the maintenance and inspection regime that ensures continued effectiveness.

Engineering controls follow the hierarchy: elimination, substitution, engineering controls, administrative controls, and personal protective equipment (PPE). The regulatory expectation across all jurisdictions is that engineering controls are the primary means of dust management, with administrative controls and PPE used only as supplementary measures where engineering controls alone are insufficient.

Haul roads: polymer dust suppression dosed into the water truck supply via automated dosing systems, extending suppression duration per application from minutes to hours. The DMP should specify the dosing rate, application frequency, the roads to be treated, the monitoring method (visual, real-time sensor, personal sampling) and the performance criterion (e.g., visible dust not extending beyond X metres from the road edge, or PM10 at the nearest boundary monitor below Y μg/m³).

Stockpiles and exposed surfaces: polymer soil binders for erosion-prone batters and cleared land; liquid veneering for ore and coal stockpiles; long-duration suppressants for static surfaces awaiting rehabilitation. Each treatment should have a specified reapplication trigger (time-based, weather-event-based or monitoring-triggered).

Processing plant: enclosure and extraction systems for fixed plant; chemical activation of spray water at crusher feeds, transfer points and screen decks. The DMP should specify the extraction system capacity, filter maintenance schedule, spray system inspection frequency and the monitoring method for verifying performance.

Underground: ventilation design parameters, chemical suppression in spray water, machine-mounted scrubber maintenance, float dust control measures, and roadway dust treatment. RS15 provides the technical framework for underground coal.

Cabin filtration: RS20 audits found that 40% of surface coal mine RCS exceedances were attributable to inadequate cabin ventilation systems. The DMP must specify the cabin filtration standard for each class of heavy mobile equipment, the inspection and maintenance schedule, and the method for verifying cabin pressurisation and filter effectiveness.

Sediment and water management: coagulation and flocculation systems for sediment basin water treatment; passive flocculant blocks in drains and basin inlets. While primarily an erosion control measure, sediment management is integral to the DMP because wind erosion of dried sediment basin deposits is a significant dust source on many sites.

Component 5: Monitoring Programme

The DMP must define a monitoring programme that covers both personal exposure monitoring (occupational health) and ambient boundary monitoring (environmental compliance). These are separate obligations with different methods, standards, reporting requirements and regulatory contacts.

Personal exposure monitoring must follow the methodology prescribed in RS14 (QLD coal), QGL02 (QLD mineral mines), or the WHS (MPS) Regulation (NSW). Key requirements include: gravimetric sampling using approved sampling heads and calibrated pumps, sampling conducted by a competent person, analysis by a NATA-accredited laboratory, results reported as 8-hour TWA concentrations for comparison against the WES, SEG-based sampling strategy with statistical analysis of results, and records retained for 30 years (40 years in some jurisdictions) for cumulative health hazard monitoring.

Ambient boundary monitoring typically uses TEOM (tapered element oscillating microbalance) or BAM (beta attenuation monitor) instruments for real-time PM10 and PM2.5 measurement at the site boundary. Monitoring station placement should be informed by dispersion modelling and located at the boundary closest to sensitive receptors and in the direction of prevailing winds. Results are assessed against the National Environment Protection (Ambient Air Quality) Measure criteria.

Real-time operational monitoring using dust sensors placed at key sources (haul roads, crushers, stockpiles) provides the site with immediate feedback on dust conditions, enabling proactive response before boundary limits are approached. This data feeds directly into the TARP framework.

Component 6: Trigger Action Response Plan (TARP)

The TARP is the escalation framework that defines what happens when monitoring results indicate that dust controls are not achieving the required outcomes. It must define trigger levels, the response actions at each level, the responsible person for each action, and the communication and reporting requirements.

A well-structured dust TARP typically operates across three or four levels. At the first level (normal operations), dust controls are operating as designed and monitoring results are within acceptable limits. At the second level (elevated), monitoring results are approaching the trigger threshold — the response might include increasing water truck application frequency, activating additional spray systems, or reducing production rates on the highest-contributing sources. At the third level (exceedance), a monitoring result has exceeded the WES or boundary limit — the response includes immediate investigation, additional controls, notification to the site senior executive, and reporting to the regulator as required. At the fourth level (repeated exceedance), the pattern indicates a systemic control failure requiring a fundamental review of the engineering controls, potentially including suspension of the contributing activity until effective controls are demonstrated.

The NSW Resources Regulator publishes its own TARP for escalating regulatory responses to exceedance events, considering the number, frequency and concentration of exceedances. Sites should align their internal TARPs with the regulator’s framework to ensure consistent escalation.

Component 7: Health Surveillance and Worker Notification

The DMP must reference the site’s health surveillance programme for dust-exposed workers. This includes pre-employment health assessments with baseline respiratory function testing (spirometry) and chest imaging, periodic health monitoring at defined intervals (typically every three years for RCS-exposed workers, or more frequently for high-risk SEGs), and exit health assessments when workers leave the operation.

From 1 October 2025 in NSW, employers must notify workers undertaking high-risk silica processing activities to the Silica Worker Register within 28 days. This register enables SafeWork NSW and the Dust Diseases Authority to identify workers requiring health monitoring and detect early respiratory health changes across the workforce. The DMP should document the site’s process for complying with this notification obligation.

Workers must be informed of their personal exposure monitoring results, the meaning of those results in relation to the WES, and the health surveillance programme available to them. De-identified monitoring records must be accessible to all workers at the site.

Component 8: Review, Reporting and Continuous Improvement

A DMP is not a static document. It must be reviewed at defined intervals (RS20 recommends at least annually) and updated whenever there is a material change to the mine plan, production rate, dust sources, workforce, regulatory standards or control technology. The review process should assess whether monitoring results indicate that controls are achieving their performance criteria, whether any exceedances have occurred and the effectiveness of the response, whether new dust sources have been created by mine plan changes, and whether new control technologies are available that could improve performance.

Each review should be documented with findings, actions and completion dates. The review record becomes part of the mine’s safety and health management system and is available for regulatory inspection.

Quarterly and annual dust monitoring reports should be prepared summarising personal exposure results by SEG, ambient boundary monitoring results, TARP activations and responses, and any incidents, complaints or regulatory interactions related to dust. These reports inform the annual review and demonstrate continuous improvement to the regulator.

A Plan That Drives Practice, Not Just Compliance

The RS20 audit programme’s finding that inadequate dust management plans represented the majority of corrective actions across Queensland coal mines is not an indictment of the concept — it is an indictment of the execution. A DMP that exists as a shelf document, written to satisfy an approval condition and never integrated into daily operational practice, protects nobody.

An effective DMP connects every element in the chain: the regulatory standard that defines the acceptable outcome, the dust source inventory that identifies what needs to be controlled, the risk assessment that prioritises effort, the engineering controls that deliver the outcome, the monitoring programme that verifies performance, the TARP that escalates when performance falls short, the health surveillance that protects workers, and the review process that drives continuous improvement.

The engineering controls available to Australian mine sites today — polymer dust suppression, automated dosing systems, polymer soil binders, chemical activation of spray water, real-time monitoring networks and water treatment systems — are more effective, more reliable and more cost-efficient than at any point in the industry’s history. The DMP is the document that deploys them. Write it well, implement it consistently, and review it honestly — and it becomes the most valuable health and safety document on the site.

Sources and References

RSHQ: Recognised Standard 20 — Summary of Audits: Dust Management on Surface Coal Mines

RSHQ: Recognised Standard 14 — Monitoring Respirable Dust in Coal Mines

NSW Resources Regulator: Airborne Contaminants and Dust — regulatory guidance, position papers, fact sheets

Safe Work Australia: Stronger Regulation of Crystalline Silica Substances from 1 September 2024 (Chapter 8A)

Queensland Resources: QGL02 — Guideline for Management of Respirable Dust in Mineral Mines and Quarries

WA EPA: Worsley Alumina — Dust Management Plan, Bauxite Mining and Transport (example published DMP)

Business Queensland: Mines Legislation and Dust Management

GRT: Silica Dust Regulations in Australian Mining

GRT: GRT: Haul-Loc — polymer dust suppressant

GRT: SMART Dosing Units — automated polymer dosing

GRT: GRT: Enviro-Binder — polymer soil binder

GRT: GRT: CC — coagulant for water treatment

GRT: Dust Suppression Solutions — full product range

GRT: Sediment Control Solutions — Liquid-Floc, Floc Blocs