Why GWE for Environmental Services
De‑risk early
we identify contamination and constraints before purchase, design or construction.
Regulatory clarity
we provide defensible reporting and liaison that withstand council and stakeholder scrutiny.
Sustainable outcomes
we balance development with ecological health and long-term viability.
Data‑led compliance
What we do
Our team of engineers and scientists help commercial and industrial clients, local government agencies and community groups manage environmental liabilities, regulatory obligations, risk management and environmental stewardship.
Environmental Liabilities & Due Diligence
GWE assists with pre–purchase or divestment Environmental Due Diligence (EDD) including assessment, auditing and investigation to fully understand the extent of hidden environmental liability and risk. Our team is highly skilled and responsive. We understand the importance of confidentiality, regular client communication and expedited delivery of reporting in support of land transfer.
Review of historical site information
Site audits, inspections and interviews with site operators
Targeted investigation of soil, stormwater, groundwater and vapour
Identification of environmental conditions and/or material risk
Recommendations with respect to the management of latent liability
Development, design and implementation of remedial options
Feasibility Assessment
We undertake site investigations, providing design information to develop a range of solutions for complex geotechnical conditions that affect land development projects including slope stability, liquefaction, foundations, ground support systems and groundwater control. We provide our clients with the following services:
Due diligence reporting and pre-purchase inspections
Site investigations
Geological/geotechnical analysis
Geotechnical design
Construction monitoring and inspection
Environmental & Safety Auditing
GWE undertakes the independent and systematic review of client activities and services, assessing compliance of the site against regulatory requirements, whilst also working with our clients to achieve compliance. Our scientist and engineers work collaboratively to resolve improvement areas through the provision of innovative design solutions.
Review of client and/or site-specific information
Site audits, inspections and interviews with site operators
Environmental and safety regulatory review
Identification of compliance gaps including prioritisation of risk
Development of client specific policies, procedures and management plans
Engineering design of improvement works
Contaminated Land & Closed Landfill Investigation & Remediation
GWE employs a highly skilled team of environmental practitioners experienced in the completion of contaminated land and closed landfill investigation across New Zealand. GWE offers a full range of site investigation services to inform our data analysis, risk assessment, technical reporting and client specific recommendations.
Review of historical site information
Site audits, inspections and interviews with site operators
Targeted investigation of soil, stormwater, groundwater, sediment and vapour/landfill gas
Contaminant fate transport modelling
Development and design of remedial options
Supervision of works, including validation sampling and post works regulatory reporting
Learn more: Contaminated Land Remediation
Ground Gas Investigation & Mitigation
GWE support our clients in the full cycle management of ground gas challenges to both commercial and residential development. Our experienced practitioners provide technical advice that is at the forefront of legislation and industry best practice.
Site inspections
Ground gas and indoor air investigation
Risk assessment and modelling
Technical reporting to support resource consent applications
Remedial works design and implementation (structural barriers, ventilation, membranes)
Expert witness support
Asbestos Services
GWE provides asbestos in soil investigations to meet regulatory requirements and avoid health & safety and environmental risk associated with asbestos. We work closely with our clients to provide pragmatic advice that will address risk in an achievable way.
Asbestos in soil investigations
Technical reporting to support resource consent applications
Asbestos in soil assessment and remediation
Remedial works design and implementation including verification sampling services
Acid Sulphate Soils
GWE provide Acid Sulphate Soil (ASS) and Potential Acid Sulphate Soil (PASS) investigations to de-risk projects with in-ground acidity risks and to avoid environmental discharge risks associated with acid water discharges and dewatering. We work closely with our clients to provide pragmatic advice that will address risk in an achievable way.
ASS/PASS desktop probability assessments
Soil sampling with analysis through NATA accredited laboratories
Provision of ASS/PASS management plans and frameworks to mitigate risks
In-situ field screening
Technical reporting
Compliance Monitoring
GWE provides short and long-term groundwater, stormwater, trade waste, sediment and gas compliance monitoring services in accordance with regulatory requirements. We have a strong understanding of regulatory process, along with intelligent data analysis that enables us to support our clients in developing strategies to minimise monitoring requirements and reduce long-term compliance costs.
Site inspections
Environmental investigation and reporting
Identification of compliance breaches and corrective procedures
Regulatory liaison
Management plans
S127 applications (change of consent conditions)
Why Choose GWE
SQEP‑led assurance
suitably qualified practitioners deliver investigations, risk assessments and defensible evidence.
De‑risk early
EDD and targeted investigations surface liabilities and constraints before you commit.
Compliance, made clear
consent‑ready documentation and regulatory liaison that withstand scrutiny.
From risk to resolution
How we work (LIFT)
L
Listen
we start by understanding your site, potential risks and stakeholder expectations.
I
Innovate
we apply targeted investigations, risk-based remediation and efficient reporting approaches.
F
Follow Through
we deliver consent documents, remedial implementation, validation and compliance monitoring.
T
Team Up
we coordinate with engineers, planners, regulators and communities to integrate environmental outcomes.
Frequently Asked Questions.
What is the difference between PSI and DSI?
PSI is a preliminary screen assessment to identify potential contamination issues. DSI is a more detailed investigation that quantifies contaminants, risks and supports remedial planning.
Do I need remediation for any contaminated land?
Not always, it depends on location, contaminant levels and land use. We assess risk, work with regulators and recommend tailored solutions.
Can you submit environmental consents for development?
Yes, we prepare the technical reports, assessments and documentation needed for resource consents tied to environmental conditions.
Do you do validation / close-out certification?
Yes, after remediation or works, we provide validation, certification and reporting to meet regulatory closure criteria.