Dust & Air Quality Monitoring During Demolition & Excavation

Dust monitoring records airborne particulate conditions at agreed positions over time, so the project can see what is happening while dust-generating activity is under way. It is most often associated with:

• Demolition, including soft strip, structural demolition and processing of arisings
• Excavation, bulk earthworks and cut-and-fill operations
• Material handling, crushing, screening and stockpiling
• Hardcore movement, tipping and loading
• Haul routes, site roads and vehicle movements in dry conditions
• Extended dry or windy weather, when otherwise manageable activities generate more dust

The managed service side — deployment, upkeep, alerts and reporting — is covered on the dust and air quality monitoring page.

A requirement can arise from the project's own dust-management arrangements, from the client, from planning or local-authority requirements, or from an appointed specialist's recommendations. Surroundings are usually the deciding factor:

• Occupied residential or commercial buildings close to the boundary
• Schools, healthcare premises and other sensitive uses nearby
• Dense urban settings with limited separation between the works and neighbours
• Existing air quality concerns in the surrounding area
• Planning conditions or local-authority requirements applying to the works

Dust positions tend to be asked for in exactly the places that are hardest to keep equipment in: alongside a demolition footprint, beside a haul route, on a boundary that is about to be rebuilt.

• Equipment installed at the location supplied or agreed for the project
• Physical security — protected from plant, site traffic, stockpiles and haul routes
• Mounting fixed and stable for the full deployment, not just for the first month
• Sensor or inlet exposure as the equipment requires, kept clear of obstructions and local sources
• Mains power where available, or battery and solar where the position and season allow
• Cellular communications and antenna placement proven at the position itself
• Enclosures and cabling weatherproofed and protected
• Commissioning and functional checks before leaving site
• Photographs and geolocation recorded for the installed position

Some dust and air-quality monitoring systems require more routine cleaning, filter or consumable attention than other monitoring equipment, depending on the system and site conditions. The environment that makes monitoring necessary can also foul inlets, load filters and shorten service intervals.

• Safe access for cleaning, filter changes and consumable attention
• Servicing intervals planned around how dusty the position actually is, not a nominal schedule
• Equipment health checks so a fault or a blocked inlet is caught early
• Power and communications faults attended to rather than left to accumulate
• Relocation as the works move — demolition phases, new haul routes, changed boundary lines
• Updated geolocation and photographs whenever a position moves
• Recovery of equipment and field infrastructure at completion

Where the selected system requires routine attention, agreeing an appropriate servicing regime at the start can reduce the risk of avoidable data gaps during the works. Maintenance and fault response covers how that attendance works.

Depending on the equipment and the project requirements, monitoring may report particulate fractions such as PM10 and PM2.5, sometimes alongside other parameters or total suspended particulate. These are examples only — systems differ, and what a project reports depends on the specification and the instruments used.

This article publishes no trigger, action or limit values. Any levels applied to a project are project-specific and come from the requirements supplied for it, not from a general rule of thumb.

Where the system supports it and the project has agreed it, alerts can be sent to nominated recipients against the levels supplied, with scheduled reporting for the monitoring period. On a demolition or earthworks programme the practical value is immediacy — a position reporting an increase this afternoon is useful while damping down or a change of method is still an option.

As phases complete and new work fronts open, positions move. Each relocation is commissioned, photographed and re-recorded so reporting stays tied to a known location.