Commercial, Residential, Infrastructure, Local Government

Our engineers, surveyors, planners and project managers thoroughly examine all options to identify the most robust and effective solutions for our clients.

With Envivo you can be sure your development plans are a success on every level.

We are excited by the new Google satellite imagery for the Auckland area. This new view of our largest city is only weeks old, we’ve created a short Google Earth Tour of some of the apartment sites we at Envivo are working on click here.  We have plenty more in progress…

Contaminated Land Management


A subdivision, resource consent or land use consent application will often require an Assessment of Environmental Effects (AEE) report. Our environmental engineers are specialists that work closely with our planners and other in-house consultants to provide assessment and management of soils contaminants in accordance with the National Environmental Standards (NES) for the protection human health and provide best practical solutions. Typically the following will be prepared/provided:

1. Preliminary Site Investigations
Preliminary Site Investigations (PSI) (mainly a desktop study) where we look at property files held at the Council and review site history. We check to see if the property is identified as a potential HAIL site – Hazardous Activities and Industries List as outlined by the Ministry of the Environment. After reviewing the property file, including any aerial images we carry out site walkovers, to check for visual indicators of potential contamination. Our environmental engineers generally look for:

  • Buried fill sites, stockpiles, underground storage tanks, used chemical containers, open incineration areas, former service stations/mechanical workshops
  • Evidence of past animal husbandry or horticultural use, common in the outer perimeters of Auckland, which could indicate past usage use of pesticides, insecticides and fungicides
  • Materials that are known to contain Asbestos, very common in east Auckland.  Click here for a full list of potential hazards.

2. Detailed Site Investigations
If from preliminary evidence suggests that is likely that contamination has occurred at the site then it will be necessary for a full site investigation to see what the extent of the contamination is. At that point we collect soil samples and send them to a laboratory for analysis. Several contaminants of interest such as heavy metals, pesticides, hydrocarbons, etc will be tested for. If results indicate contamination above acceptable human health levels or permitted activity levels we evaluate the risks are make recommendations of the most effective way forward in managing the risks in accordance with the NES

3. Remediation plan
The remediation report includes goals for mitigating the problem and a site management plan. We specify and work with contractors to remediate and/or manage the contamination onsite.

4. Site validation report
Generally as a final step, we carry out a site validation report for review by the local authority. Depending on the size of the project, this entails going back to the site collecting more samples and reviewing past reports to ensure that remediation goals have been achieved. Where the local authority is satisfied with the works, acceptance is issued which allows for developments to proceed.

To find out more about our planning and environmental engineering services click here.

Are you about to subdivide or change the land use? if yes this fact sheet may assist – click here


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