Getting the fieldwork right – PFAS monitoring in rivers and stormwater

For consultants investigating PFAS in rivers and stormwater, the usefulness of a dataset depends on decisions made before samples reach the laboratory: when to collect them, how they relate to changing flows and what they contact along the way.

HydroTerra helps put those decisions into practice. We work alongside environmental consultants, providing equipment, installation and field sampling support across surface water, stormwater, wastewater and groundwater investigations.

During a storm or changing wastewater discharge, the timing of sampling can make a significant difference to the picture that emerges. Separately analysed time-series samples allow consultants to examine changes through an event. Composite samples combine information across the collection period but can mask short-lived peaks. Choosing the appropriate approach means matching the collection method to the investigation’s objectives and laboratory requirements.

HydroTerra uses autosamplers and flow meters to support event-triggered sampling, with time-series or composite collection configured to the agreed program. Having equipment installed and ready ahead of an event helps teams capture the conditions they need to investigate, particularly when sampling windows are short.

Where an investigation considers how much PFAS is moving through a waterway or discharge, concentration results need corresponding flow information. A lower concentration during a higher flow can still represent a substantial contaminant load. Aligning sample timing with flow measurements gives consultants the inputs needed to understand that movement.

HydroTerra has helped many clients gather data for PFAS mass-flux assessments at contaminated sites across Australia. Our experience also includes wastewater, surface-water and groundwater sampling for water utilities, bringing practical knowledge of deploying equipment and collecting samples across different field conditions.
Collecting the sample is only part of the challenge. Tubing, fittings, containers and handling practices all need attention to minimise the potential for contamination. Field and equipment rinsate blanks provide checks on whether the collection process has introduced PFAS. It’s one part of the investigation where finding nothing is a welcome result.

Our personnel are trained in PFAS sampling practices and understand the care needed to protect sample integrity. We provide specialised grab-sampling equipment, PFAS-specific groundwater sampling kits and autosampler components selected to minimise potential contamination. These support the project’s sampling and quality control procedures, helping consultants gather data they can assess with confidence.

Whether a project requires a monitoring installation ahead of a rainfall event or additional personnel for a scheduled sampling round, HydroTerra can provide the equipment and field capacity to keep the program moving.

Our support fits around your team:

• Equip your field crew: HydroTerra supplies sampling equipment, completes installations, trains your personnel in its operation and handles demobilisation.
• Bring our field crew: HydroTerra personnel collect grab samples using specialised equipment suitable for PFAS sampling, adding experienced field capacity to your project.

Consultants lead the assessment, interpretation and reporting.

HydroTerra provides the equipment, deployment support and sample collection that turn plans into usable field data.

Planning a PFAS investigation? Talk to HydroTerra about equipment and field support for your next sampling program.

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