Capabilities › Air & Soil Gas
Air & Soil Gas Testing
NATA accredited testing for ambient air, indoor air quality, stack emissions, soil gas, and vapour intrusion — supporting environmental assessment, workplace safety, and regulatory compliance.
NATA
Accredited
TO15 - TO17 - M18
Key VOC methods
ASTM1945
ASTM1946
Fixed gas methods
Overview
Air Quality & Gas Testing
Air quality affects health, workplace safety, regulatory compliance, and environmental outcomes. Contaminants in the form of dust, fumes, vapours, and gases can originate from industrial processes, contaminated land, landfill sites, and building materials — with concentrations often higher indoors than in ambient outdoor environments.
Envirolab is NATA accredited for a comprehensive range of air and gas analytes including VOCs, sulphur compounds, fixed and permanent gases, and stack emission parameters. If you're looking for a specific compound not listed here, contact us — our accreditation list is extensive.
Volatile Organic Compounds
VOC Testing in Air & Soil Gas
Volatile Organic Compounds (VOCs) evaporate readily at room temperature and can accumulate in indoor environments from building materials, furnishings, office equipment, and industrial processes. On contaminated sites, VOCs from fuel spills and chlorinated solvents can migrate through soil gas into buildings — a pathway known as vapour intrusion.
Envirolab is NATA accredited for VOC analysis across three key collection methods
- UESPA TO-15 — VOCs in ambient air collected in Summa Canisters
- UESPA TO-17 — VOCs in ambient air collected on thermal desorption tubes
- UESPA Method 18 — VOCs in landfill gas and stack emissions
Stack Emission Testing
Stationary Source & Stack Emission Testing
Industrial facilities are required to monitor and report stack emissions under environmental licensing conditions. Envirolab provides comprehensive stack testing and stationary source emission analysis, supporting compliance reporting across a wide range of industrial sectors.
- Carbon monoxide (CO)
- Gaseous and particulate fluoride
- Hexavalent chromium
- Hydrogen sulphide (H₂S)
- Total reduced sulphur
- Halides and halogens
- Metals in stack emissions
- Nitrogen oxides (NOx)
- SO₂, SO₃ and sulphuric acid mist
- Total suspended particulates (TSP)
- Permanent and light gases
- VOCs (Method 18)
Note: Dioxins, SVOCs and co-planar PCBs in stack emissions are available via sub-contract. Contact us to discuss your full reporting requirements.
Ozone Precursors
Ozone Precursor Monitoring
Ground-level ozone forms when nitrogen oxides (NOx) and volatile organic compounds react under UV radiation. Unlike stratospheric ozone, ground-level ozone is a pollutant with significant impacts on human health, vegetation, and ecosystems. Urban sources include vehicle exhaust, incinerator emissions, and industrial processes.
- NOx and VOC monitoring in ambient air
- Ozone precursor assessment in landfill gas
- NATA accredited methods for ambient monitoring programs
Sampling advice: Sample collection method selection depends on the monitoring scenario. Contact our team to confirm the right approach for your project before sampling.
Speciated Sulphur
Sulphur Compound Testing
Sulphur compounds in air arise from fossil fuel combustion, ore smelting, and petroleum refining. At elevated concentrations many are toxic, and even at low concentrations hydrogen sulphide and related compounds produce the characteristic odour associated with industrial sites, landfills, and wastewater treatment facilities.
Monitoring sulphur speciation in air is important for both regulatory compliance and workplace health and safety.
- Hydrogen sulphide (H₂S)
- Total reduced sulphur compounds
- Sulphur dioxide (SO₂) and sulphur trioxide (SO₃)
- Sulphuric acid mist (H₂SO₄)
- Speciated sulphur in ambient and industrial air
Vapour Intrusion & Soil Gas
Vapour Intrusion & Soil Gas Assessment
Vapour intrusion occurs when volatile chemicals in contaminated groundwater or soil emit vapours that migrate upward through soil and into buildings via foundations, basements, and service penetrations. It is one of the key exposure pathways assessed during contaminated site investigations and is increasingly scrutinised in regulatory submissions.
Fugitive emissions from pressurised industrial equipment present a similar risk in workplace environments. Both require careful, representative sampling to accurately characterise exposure risk.
- Sub-slab and indoor air VOC sampling
- Soil gas VOC assessment — Summa Canisters, Tedlar bags, thermal desorption tubes, gas bombs
- Confined space and basement vapour monitoring
- Fugitive emission characterisation from industrial equipment
- Landfill gas monitoring
Key consideration: Vapour sampling conditions at the time of collection should match conditions under which occupant exposure occurs — seasonal variation, building pressurisation, and HVAC operation all affect results. Our team can advise on representative sampling design.
Ready to get started?
Talk to our team about your air quality or gas testing requirements
we'll advise the right sampling method and get results back fast.