The contaminated site consultancy

  • Welcome to Hail Environmental

    Welcome to Hail Environmental

    Qualified and experienced contaminated land specialists helping clients around New Zealand

  • Preliminary Site Investigations (PSI)

    Preliminary Site Investigations (PSI)

    A PSI is often the first step required in assessing a contaminated site and defines what further action, if any, should be undertaken.

  • Detailed Site Investigations

    Detailed Site Investigations

    Detailed Site Investigations (DSI) are used to determine the impact of former land use activities on a site.

  • Environmental Due Diligence

    Environmental Due Diligence

    HAIL Environmental carries out Environmental Due Diligence (EDD) for clients who are looking to purchase property that may be impacted by former land use activities.

  • Remediation or Management of Contaminated Sites

    Remediation or Management of Contaminated Sites

    The selection of appropriate remediation or management options for a contaminated site is complex and influenced by a wide range of environmental factors and clients requirements.

  • Compliance monitoring

    Compliance monitoring

    Compliance monitoring is often required on consents. HAIL Environmental offers cost effective monitoring services for clients to ensure compliance with resource consent conditions.

  • Emergency Response

    Emergency Response

    Acting quickly to isolate and contain accidental releases of hazardous substances can save time, money and reputational damage.

  • Project management and stakeholder engagement

    Project management and stakeholder engagement

    Large remediation projects often require significant investigation, consultation and planning prior to implementation.

Latest News

Best Presentation at Ecoforum

Dr. Dave Bull and Waikato Regional Council team leader Michelle Begbie were awarded best podium presentation on the second day of the Australasian Land and Groundwater Association's annual Ecoforum conference recently held in Auckland. Michelle and Dave argued that arsenic is the most common contaminant of concern in New Zealand, especially in the Waikato Region. Arsenic contamination is often a result of human activities such as sheep dipping, codling moth control in apples, or timber treatment and use. But elevated arsenic can also be geogenic – naturally occurring – and in these cases the conceptual site model and risk mitigation are always much harder to resolve. They introduced a natural source of arsenic in the Waikato Region; not a new topic in itself, but our approach to identifying the risk it poses and how it should be managed are new. The Waikato Region is blessed with rich volcanic minerals and fluids. It has long been known that the Waikato River itself has elevated arsenic; mostly derived from naturally occurring geothermal inputs, but enhanced by human factors such as geothermal power stations and water extraction and use. Natural groundwater in the region is also elevated with arsenic thanks to our unique combination of geology and enhanced rates of weathering from geothermal heating. Multiple contaminated land investigations in the region have identified naturally occurring arsenic, which has posed significant challenges to land redevelopment. In particular, certain soils of the Hamilton Basin feature an iron pan heavy with naturally enriched arsenic, often exceeding Soil Contaminant Standards (SCS) and at times well into the hundreds of mg/kg. Michelle selected a number of sampling sites in an area currently under heavy development pressure, where arsenic is often reported elevated, in the absence of any obvious man-made source of contamination. Samples were analysed for arsenic bioaccessibility, and for a variety of chemical and mineralogical determinands so as to provide multiple lines of evidence. Dave presented information collated to date. Elevated arsenic in the study area seems strongly associated with Bruntwood type soils, apparently formed on riverbanks deposited after the Oruanui eruption 26,000 years ago, and associated breakout floods from the Lake Taupo area. "Iron pans" that have formed in Hamilton Basin soils also seem to be generally enriched in arsenic. These iron pans can sometimes be broken up and brought to surface, increasing topsoil arsenic concentrations, by ploughing - or as an unintended consequence of soil mixing intended as a remedial action! Initial results suggest that arsenic bioaccessibility and bioavailability in these impacted soils is considerably less than the 100 % assumed in guidance, indicating that the risk these soils pose is lower than a simple comparison with the SCS would suggest. Supporting analysis is still ongoing. Michelle hopes that the project will enable some broader discussions about sustainable land management and how policy might be able to respond in a way that enables practical and risk-based land management before development.


HAIL Environmental was formed by Brendon Love in early 2014. Brendon’s vision was inspired after seeing a gap in the consulting market.

Since the introduction of the National Environmental Standards for Assessing and Managing Contaminants in Soil to Protect Human Health (NES) the need for contaminated site investigation and management services has increased.

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Our contaminated site services cover a range of investigation techniques that are designed with our clients’ needs in mind.

Whether you have been requested to provide a report on your site to fulfil the requirements of the National Environmental Standards (NES), or are looking to assess environmental liability as part of pre-purchase due diligence our team of experienced consultants can assist.

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Central Otago – Assessment of health risks associated with naturally occurring arsenic

HAIL Environmental has joined forces with Davis Consulting Group to tackle an Otago developer’s unwelcome surprise. Soil testing across the 30-lot lifestyle subdivision revealed arsenic levels were consistently above the national Soil Contaminant Standard – even though there was no visible manmade source.”

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