Comprehensive desktop study, site inspection, and reporting.
Preliminary Site Investigation (PSI)
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Hunter Geotechnical Services offers Preliminary Site Investigations (PSI) to assess potential site contamination.
A Preliminary Site Investigation (PSI), also known as a Phase 1 Investigation, is the first step in evaluating the contamination potential of a site. This initial investigation combines desktop research with on-site inspections to identify historical land uses, potential contamination sources, and environmental risks. By understanding the site’s history and current conditions, a PSI helps to assess whether further investigation or remediation might be required.
At Hunter Geotechnical Services, we offer comprehensive PSI services across Newcastle, Lake Macquarie, the Hunter Valley, the Mid-North Coast, and NSW. Our team conducts thorough evaluations to provide you with clear, actionable insights, ensuring your project meets regulatory requirements and minimises environmental risks. Whether you’re preparing for development, buying land, or ensuring compliance, a PSI is an essential step towards informed decision-making.
Overview of Preliminary Site Investigations
A Preliminary Site Investigation (PSI), also known as a Phase 1 Investigation, is the first essential step in assessing the contamination status of a site. This investigation provides a thorough understanding of the site’s history and current conditions to identify any potential or existing contamination issues.
Key Components of a PSI
- Desktop Study
The PSI begins with a comprehensive desktop study, where existing information about the site is collected and analysed. This includes historical land use, zoning records, aerial photographs, and any prior environmental reports. The goal is to identify possible sources of contamination, potential contaminants of concern, and areas that may be affected. - Site Inspection
Following the desktop study, a physical inspection of the site is conducted. This on-ground assessment helps to verify information gathered during the desktop study and to observe any visible signs of contamination, such as distressed vegetation, staining, or unusual odours. - Report Preparation
After the site inspection, a detailed report is prepared. This report summarises the findings from the desktop study and site inspection. It identifies historical sources of contamination, potential contaminants, affected areas, and any human or ecological receptors at risk. The report also outlines the affected media, including soil, groundwater, and surface water. - Limited Sampling (Optional)
In some cases, limited sampling may be included in the PSI if there is enough information to safely conduct the sampling. This can help gather preliminary data about potential contaminants. However, a full Detailed Site Investigation (DSI) may still be required depending on the findings.
Substituting a PSI with an Environmental Site Assessment (ESA)
In certain instances, an Environmental Site Assessment (ESA) can replace a PSI, offering a more cost-effective solution for the client. Hunter Environmental Services can liaise with relevant authorities to determine whether an ESA is sufficient for your site, ensuring compliance with local regulations and standards.
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Frequently Asked Questions
1. What is the difference between a PSI and a DSI?
A PSI is a preliminary assessment that identifies potential contamination through a desktop study and site inspection, with limited sampling if necessary. A DSI, on the other hand, involves more extensive sampling and testing to determine the exact extent and nature of the contamination, providing the data needed for remediation.
2. Do I need both a PSI and a DSI?
In many cases, a PSI is the first step. If the PSI identifies potential or actual contamination, a DSI is usually required to fully assess the situation and develop a remediation plan.
3. Can an ESA replace a PSI?
Yes, in some cases, an Environmental Site Assessment (ESA) can replace a PSI, depending on the site’s specifics and the regulatory requirements. Hunter Geotechnical Services can advise on whether an ESA is suitable for your site.
4. What regulations and standards govern PSIs and DSIs?
PSIs and DSIs are governed by various Australian standards and regulations, including the National Environment Protection (Assessment of Site Contamination) Measure (NEPM) and the State Environmental Planning Policy (Resilience and Hazards) 2021. Compliance with these standards is essential for any site investigation.
Contact Us Today About Your Preliminary Site Investigation
Hunter Geotechnical Services offer contaminated land site investigation services throughout Newcastle, Lake Macquarie, the Hunter Valley, Mid-North Coast and across NSW. Speak to an expert about your PSI needs. Call us today or complete this form with your details and we’ll contact you shortly.
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