Preliminary Site Investigation (PSI) for a Childcare Development Application — Western Sydney

Preliminary Site Investigation (PSI) to support a childcare development — Western Sydney

iEnvi prepared a rapid Preliminary Site Investigation (PSI) for a developer proposing to convert a post‑war residential property in western Sydney into a childcare facility. The client faced tight approval timeframes; iEnvi delivered a comprehensive 193‑page PSI in seven days to support lodgement. The assessment concluded the site was low risk for contamination, subject to a specialist asbestos inspection of the existing building prior to renovation.

What a PSI is (plain English)

A Preliminary Site Investigation (PSI), often called a Phase 1 contamination assessment, is a risk‑based desktop and site inspection that:

• reviews historical land use and council records;
• inspects the site for signs of contamination or hazardous materials (for example, asbestos, lead paint or fuel leaks);
• considers local soil, groundwater and nearby potential sources of contamination; and
• recommends whether further investigation (a Detailed Site Investigation) or management actions are required.

Why a PSI matters for childcare developments

Childcare facilities are classed as a more sensitive land use because children can be more vulnerable to contaminants. NSW planning guidance for child care site selection expects applicants to show the site is “environmentally safe” and councils commonly require a phase 1 contamination assessment where there is any potential risk. A clearly documented PSI helps developers:

• de‑risk the development approval process and reduce the chance of referral delays, conditions or refusal;
• identify hazardous materials (for example asbestos) early so refurbishment planning, costing and licensing can be managed; and
• avoid unexpected remediation costs that can delay construction or settlement.

Key outcomes from iEnvi’s engagement (project summary)

• Scope: desktop review, site inspection and conceptual site model consistent with national/state guidance.
• Deliverable: 193‑page PSI report completed in seven days to meet developer time pressure.
• Finding: site assessed as low contamination risk based on historical and current land use and local conditions.
• Action required: specialist inspection and sampling for asbestos or other hazardous building materials prior to renovation works.

Practical takeaways for developers and certifiers

1. If you are changing a residential property to a childcare use, assume a council or consent authority will require evidence the site is environmentally safe — a PSI is commonly accepted for this purpose.
2. Include asbestos inspection and (if needed) NATA‑accredited laboratory testing as an early line item in budgets for older buildings. Modern Australian guidance requires accredited testing methods and qualified sampling to demonstrate materials are or are not asbestos.
3. Early commissioning of a PSI reduces approval risk, gives lenders and purchasers confidence, and allows realistic programming of refurbishment and licensing activities.

How iEnvi can help

iEnvi provides NSW‑aligned site contamination assessments, rapid desktop PSIs and, where needed, follow‑up detailed investigations and management strategies. Our reports are prepared to support planning lodgements, development approvals and compliance with relevant national and NSW guidance. For a confidential discussion about a potential site or DA: call 13000 43684 or contact us via our contact page.

Call iEnvi: 13000 43684