Investigating land, water and air.

We work with all stakeholders and service providers to help create environmentally sustainable outcomes that are realistic and cost effective. Our comprehensive services can be provided as part of a multi-disciplinary project, or as a standalone service for any project specifically requiring environmental science expertise and solutions.

From local authorities, commercial and residential land developers, small residential homeowners, architects, service partners, and lawyers, we seamlessly integrate our expertise with other disciplines to achieve the best outcome for a diverse range of clients.

As required by the NESCS legislation, our contaminated land investigation and management works are led / undertaken by our Suitably Qualified and Experienced Practitioners (SQEP). Our lead consultant is a Certified Environmental Practitioner – Site Contamination Specialist (CEnvP – SC).

We have specialist expertise in both asbestos management and occupational health.

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Our environmental science services include
Asbestos management
Contaminated land investigation and management
Occupational hygiene
Planning and supervision of the remediation of contaminated soil, sediment and water
Ground gas and soil vapour assessment and mitigation
Human health and environmental risk assessments
Pre-purchase due diligence and risk assessments
Resource consent compliance monitoring
Ground water quality assessments

We have expertise in the identification and management of asbestos to help you with this hazardous material – find out more.

Our work is led by a Suitably Qualified and Experienced Practitioners (SQEP). Our lead consultant is a Certified Environmental Practitioner – Site Contamination Specialist (CEnvP – SC) – Find out more.

Our team of environmental scientists help to identify, manage and prevent potential adverse health issues caused by exposure to hazards in the work environment. This includes hazardous chemicals, noise and vibration, dust, drinking water, biological, and air quality. Find out more.

Our environmental science services include
Asbestos management

We have expertise in the identification and management of asbestos to help you with this hazardous material – find out more.

Contaminated land investigation and management

Our work is led by a Suitably Qualified and Experienced Practitioners (SQEP). Our lead consultant is a Certified Environmental Practitioner – Site Contamination Specialist (CEnvP – SC) – Find out more.

Occupational hygiene

Our team of environmental scientists help to identify, manage and prevent potential adverse health issues caused by exposure to hazards in the work environment. This includes hazardous chemicals, noise and vibration, dust, drinking water, biological, and air quality. Find out more.

Planning and supervision of the remediation of contaminated soil, sediment and water
Ground gas and soil vapour assessment and mitigation
Human health and environmental risk assessments
Pre-purchase due diligence and risk assessments
Resource consent compliance monitoring
Ground water quality assessments
Request a call from an environmental specialist

FREQUENTLY ASKED QUESTIONS
Why do you need a Contaminated Land Specialist?
What do I need to provide for the contaminated land investigation?
My site is on the regional council listed land use register (LLUR), what does this mean?
What is a “SQEP”?
Is DO experienced in managing asbestos?
What does the investigation involve?
What contaminants are likely to be present?
Am I, my family or workers at risk? 

The introduction of the Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health) Regulations 2011 (NESCS) changed the way contaminated land in New Zealand is managed. The NESCS applies to any site where an activity on the Hazardous Activities or Industries List (HAIL) “has or is more likely than not to have, occurred”, and covers a number of activities onsite including:

  • change of land use, for example from production (farm) land to residential use
  • subdivisions
  • soil disturbance and soil removal.

Undertaking the above activities on sites where a HAIL activity has been identified, or is suspected, requires investigation of the site and potentially an application for contaminated land related consents and / or contamination management works.

As required by the NESCS legislation our contaminated land investigation and management works are led / undertaken by our Suitably Qualified and Experienced Practitioners (SQEP). Our lead consultant is a Certified Environmental Practitioner – Site Contamination Specialist (CEnvP – SC).

It helps us to know the changes that you’re proposing to make to your site and if possible, the required scope of works. If you have any information on HAIL or potential HAIL activities this would be useful.

This means your site has been identified as having (verified) or ‘more likely than not having’ (unverified) an activity on the HAIL list that may have resulted in ground contamination. This means the requirements of the NESCS legislation may apply to activities on the site.

A ‘Suitably Qualified and Experienced Practitioner’, is required under the NESCS legislation to certify contaminated land reports (PSI, DSI, Remediation Action Plans etc). Our lead consultant is a SQEP and a Certified Environmental Practitioner (CEnvP) with with over 16 years’ experience across a wide range of industries, contaminant types and contaminant mediums (soil, groundwater, sediment and vapour).

Our contaminated land team has significant experience in the investigation, remediation and management of asbestos contamination of soils and are qualified to do so. We are also qualified and experienced asbestos surveyors and so can identify where asbestos is present in your above ground assets. We can assist you with the identification and management of asbestos in buildings where required. 

Preliminary site inspections typically involve a desk study plus a site visit and review of site procedures and operations.  Ideally interview of site owners and on-site personnel would also occur during the desk study or site inspection phases.  A conceptual model (CSM) identifying where potential contaminants may be present, the pathways they may take and the receptors that are present on or off-site which may be exposed to the contaminants is created and an investigation designed to evaluate the CSM. There are numerous methods to investigate a site and the required method is dependent upon the CSM and the contaminants to be evaluated, the environmental medium to be assessed, site geology and site constraints.

 

Common investigation methods for shallow contaminants can include manual sampling techniques with trowels or hand augers.  Machine excavation of test pits and/or machine boreholes may be required depending on the ground conditions and investigation goals. 

This is entirely dependent on the type of HAIL activity. However, experience across many hundred sites indicates the most common contaminants encountered are heavy metals (for example arsenic and lead), petroleum hydrocarbons, polycyclic aromatic hydrocarbons, organochlorine pesticides and asbestos.

There are several types of risk related to land contamination. They can present a risk of litigation due to illegal discharges to the environment and they can present a risk to human health and environmental receptors. The level of risk depends on the type of contamination that’s present, concentrations present, site use and potential exposure routes. 

 

Where contamination is identified and a complete exposure route is present then potential risks to human health and the environment may exist. We are happy to talk through the potential risks and possible mitigation and management options with you, with no obligation or initial consultation charges. 

FREQUENTLY ASKED QUESTIONS
Why do you need a Contaminated Land Specialist?

The introduction of the Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Human Health) Regulations 2011 (NESCS) changed the way contaminated land in New Zealand is managed. The NESCS applies to any site where an activity on the Hazardous Activities or Industries List (HAIL) “has or is more likely than not to have, occurred”, and covers a number of activities onsite including:

  • change of land use, for example from production (farm) land to residential use
  • subdivisions
  • soil disturbance and soil removal.

Undertaking the above activities on sites where a HAIL activity has been identified, or is suspected, requires investigation of the site and potentially an application for contaminated land related consents and / or contamination management works.

As required by the NESCS legislation our contaminated land investigation and management works are led / undertaken by our Suitably Qualified and Experienced Practitioners (SQEP). Our lead consultant is a Certified Environmental Practitioner – Site Contamination Specialist (CEnvP – SC).

What do I need to provide for the contaminated land investigation?

It helps us to know the changes that you’re proposing to make to your site and if possible, the required scope of works. If you have any information on HAIL or potential HAIL activities this would be useful.

My site is on the regional council listed land use register (LLUR), what does this mean?

This means your site has been identified as having (verified) or ‘more likely than not having’ (unverified) an activity on the HAIL list that may have resulted in ground contamination. This means the requirements of the NESCS legislation may apply to activities on the site.

What is a “SQEP”?

A ‘Suitably Qualified and Experienced Practitioner’, is required under the NESCS legislation to certify contaminated land reports (PSI, DSI, Remediation Action Plans etc). Our lead consultant is a SQEP and a Certified Environmental Practitioner (CEnvP) with with over 16 years’ experience across a wide range of industries, contaminant types and contaminant mediums (soil, groundwater, sediment and vapour).

Is DO experienced in managing asbestos?

Our contaminated land team has significant experience in the investigation, remediation and management of asbestos contamination of soils and are qualified to do so. We are also qualified and experienced asbestos surveyors and so can identify where asbestos is present in your above ground assets. We can assist you with the identification and management of asbestos in buildings where required. 

What does the investigation involve?

Preliminary site inspections typically involve a desk study plus a site visit and review of site procedures and operations.  Ideally interview of site owners and on-site personnel would also occur during the desk study or site inspection phases.  A conceptual model (CSM) identifying where potential contaminants may be present, the pathways they may take and the receptors that are present on or off-site which may be exposed to the contaminants is created and an investigation designed to evaluate the CSM. There are numerous methods to investigate a site and the required method is dependent upon the CSM and the contaminants to be evaluated, the environmental medium to be assessed, site geology and site constraints.

 

Common investigation methods for shallow contaminants can include manual sampling techniques with trowels or hand augers.  Machine excavation of test pits and/or machine boreholes may be required depending on the ground conditions and investigation goals. 

What contaminants are likely to be present?

This is entirely dependent on the type of HAIL activity. However, experience across many hundred sites indicates the most common contaminants encountered are heavy metals (for example arsenic and lead), petroleum hydrocarbons, polycyclic aromatic hydrocarbons, organochlorine pesticides and asbestos.

Am I, my family or workers at risk? 

There are several types of risk related to land contamination. They can present a risk of litigation due to illegal discharges to the environment and they can present a risk to human health and environmental receptors. The level of risk depends on the type of contamination that’s present, concentrations present, site use and potential exposure routes. 

 

Where contamination is identified and a complete exposure route is present then potential risks to human health and the environment may exist. We are happy to talk through the potential risks and possible mitigation and management options with you, with no obligation or initial consultation charges.