The contamination testing industry in Australia is unregulated. There is no licensing requirement, no mandatory qualification, and no government body overseeing who can — or cannot — call themselves a contamination tester. This means the responsibility for verifying competence falls entirely on you, the consumer. This 12-point checklist gives you the tools to make that verification.

I’ve spent over 24 years in forensic contamination assessment. In that time, I’ve reviewed thousands of reports from other testing companies — some excellent, many adequate, and a disturbing number that were scientifically indefensible. I’ve seen reports that led to $100,000 in unnecessary remediation because the tester couldn’t distinguish between manufacturing and use contamination. I’ve seen reports thrown out of court because the tester had no verifiable qualifications. I’ve seen “free testing” programmes operated by remediation companies that — predictably — found contamination requiring their own remediation services.

This checklist exists because consumers deserve better. Use it before you engage any contamination testing company — including ours.

The 12-Point Checklist

1. Tertiary Science Qualifications

The assessor should hold a tertiary qualification in a relevant science discipline — chemistry, forensic science, environmental science, or a related field — from an accredited Australian university. This is non-negotiable. Interpreting contamination results requires understanding of analytical chemistry, toxicology, exposure pathways, and building science. These subjects are not covered in weekend training courses.

Ask: “What are your tertiary qualifications?” A qualified professional will answer specifically — degree name, institution, discipline. Evasive answers (“I’ve done extensive training”) or references to certificates rather than degrees are red flags.

2. Professional Memberships (RACI/AIOH)

Membership of the Royal Australian Chemical Institute (RACI) indicates that the assessor’s chemistry qualifications have been verified by the peak professional body. MRACI (Member) status requires a recognised chemistry degree. CChem (Chartered Chemist) status requires demonstrated competence through experience and assessment. These credentials can be verified directly through RACI.

Membership of the Australian Institute of Occupational Hygienists (AIOH) is relevant for indoor air quality and occupational exposure assessments. Other relevant bodies include ANZFSS (Australia and New Zealand Forensic Science Society), NSWAFI (NSW Association of Forensic Investigators), and IAQAA (Indoor Air Quality Association of Australia).

3. Uses NATA-Accredited Laboratories

The laboratory analysing your samples must hold current NATA accreditation for the specific tests being performed. NATA (National Association of Testing Authorities) accreditation means the laboratory meets ISO/IEC 17025 international standards and has been independently audited.

Importantly, the testing company itself does not need to be NATA-accredited. Many reputable testing companies — including Test Australia — use independent, third-party NATA-accredited laboratories. This model actually enhances independence by maintaining separation between field assessment and laboratory analysis.

Ask: “What laboratory analyses your samples, and what is their NATA accreditation number?” Verify the accreditation on the NATA website.

4. Does NOT Also Remediate

This is the most critical independence criterion. A company that provides both testing and remediation has a direct financial conflict of interest. They profit from finding contamination, recommending remediation, and then conducting that remediation. The incentive structure makes objective assessment impossible.

Some companies disguise this conflict by operating remediation services under different trading names, or by receiving referral commissions from “preferred” remediation contractors. Ask directly: “Does your company, or any related entity, have any ownership interest in, or receive referral fees from, any cleaning, remediation, or restoration business?”

5. Chain of Custody Procedures

Chain of custody documentation tracks every sample from collection through laboratory analysis. It records who collected the sample, when, where, how it was transported, when it was received by the laboratory, and who analysed it. This documentation is essential for legal defensibility and ensures samples cannot be tampered with or misidentified.

Ask: “Do you maintain chain of custody documentation for all samples?” The answer should be an immediate and confident “yes.”

6. Follows NIOSH 9111 (for Methamphetamine)

NIOSH Method 9111 is the internationally recognised standard method for methamphetamine surface sampling. It specifies the sampling media, wetting agent, sampling area, extraction procedure, and analytical technique. For mould, the assessor should follow recognised air sampling methodologies using calibrated sampling equipment.

A qualified assessor should be able to name and explain their sampling methodology without hesitation. If they can’t, they likely don’t fully understand the science behind what they’re doing.

7. Professional Insurance (PI + PL)

A legitimate testing company carries both Professional Indemnity (PI) insurance and Public Liability (PL) insurance. Professional Indemnity insurance protects you if the assessor’s advice or report contains errors that cause you financial loss. Public Liability insurance covers damage to your property during the assessment.

Ask: “Can you provide a certificate of currency for your Professional Indemnity and Public Liability insurance?” A professional will provide this without hesitation.

8. Written Comprehensive Reports

A professional assessment report should be a comprehensive document, not a one-page summary. It should include the assessor’s qualifications and credentials, detailed methodology description, sample locations documented with photographs, NATA-accredited laboratory certificates, results interpretation with guideline comparison, source determination (where applicable), and clear recommendations.

Ask for a redacted sample report before engaging. The quality of the report tells you everything about the quality of the assessment.

9. Can Explain Methodology

A qualified assessor should be able to explain their entire methodology in plain language — why they sample where they do, how they select sample locations, what quality control measures they use, how they interpret results, and what the limitations of their assessment are. Science that can’t be explained simply isn’t understood well enough.

10. Transparent Pricing

Professional testing companies provide clear, written quotes before work begins. The quote should specify the number and type of samples, the laboratory analysis to be performed, the report deliverable, and the total cost. Be wary of vague pricing (“we’ll see when we get there”) or pricing that seems dramatically below market rates (corners are being cut somewhere).

11. No Pressure Tactics

A professional assessor presents findings objectively and lets you make informed decisions. If a testing company uses urgency tactics (“you need to act now or your family is at risk”), emotional manipulation, or pressure to commit to remediation immediately, walk away. Legitimate contamination issues don’t require same-day decisions — they require proper assessment and informed decision-making.

12. Court-Ready Documentation

Even if you don’t anticipate legal proceedings, your assessment documentation should be prepared to a standard that would withstand scrutiny in court or tribunal. This means verifiable assessor credentials, documented methodology, chain of custody, NATA-accredited laboratory certificates, and professional opinion supported by evidence. If the documentation isn’t court-ready, it may not be accepted by insurance companies either.

Red Flags to Watch For

Beyond the checklist, these specific warning signs should give you immediate pause:

• “We can do the testing and the remediation”: Conflict of interest. Always.
• “Our laboratory is NATA-accredited” (but they can’t provide the number): Verify independently or assume it’s false.
• “We don’t need a formal report — I’ll tell you the results verbally”: No documentation means no accountability and no legal standing.
• Quoting without asking about the property: They can’t provide an accurate quote without understanding the scope.
• “We can have a remediation crew there tomorrow”: They’re selling remediation, not assessment.
• No ABN or business registration details: Basic business legitimacy check.
• Unwillingness to provide sample reports, insurance certificates, or qualification documents: If they won’t share credentials, they likely don’t have them.

The Difference Between a Tester and an Assessor

This distinction is critical and frequently misunderstood. A tester collects samples and reports numbers. An assessor collects samples, interprets results in context, determines contamination sources, understands the science behind the numbers, and provides professional opinion and actionable recommendations.

Anyone can learn to collect a sample in a weekend course. Interpreting what those results mean — distinguishing manufacturing from use, understanding species significance in mould results, determining whether results are representative of actual occupant exposure — requires tertiary science qualifications, professional experience, and ongoing professional development.

When you’re making decisions worth tens or hundreds of thousands of dollars, you want an assessor, not just a tester.

Questions to Ask Before Hiring

Before engaging any contamination testing company, ask these questions and evaluate the answers against the 12-point checklist:

1. “What are your tertiary qualifications in science?”
2. “Are you a member of RACI, AIOH, or any other professional body? What is your membership number?”
3. “What laboratory do you use, and what is their NATA accreditation number?”
4. “Does your company, or any related entity, provide remediation, cleaning, or restoration services?”
5. “Do you maintain chain of custody documentation for all samples?”
6. “What sampling methodology do you use?”
7. “Can you provide a certificate of currency for your Professional Indemnity and Public Liability insurance?”
8. “Can I see a redacted sample report?”
9. “Can you provide a written fixed-price quote?”
10. “Have your reports been used in court or tribunal proceedings?”

A qualified, independent professional will answer all of these questions confidently, specifically, and without hesitation. Evasive, vague, or defensive answers tell you everything you need to know.

How Test Australia Meets All 12 Criteria

I’ll be transparent about how Test Australia meets each criterion, because we believe every testing company should be willing to demonstrate compliance with these standards:

1. Tertiary qualifications: DAppSc (Applied Chemistry) — Diploma of Applied Science in Applied Chemistry.
2. Professional memberships: MRACI CChem (Royal Australian Chemical Institute — Member, Chartered Chemist), AIOH, ANZFSS, NSWAFI, IAQAA.
3. NATA-accredited laboratories: All samples are analysed by independent NATA-accredited laboratories. We provide the laboratory’s NATA accreditation number on every report.
4. Independence: Test Australia has no ownership interest in any laboratory, cleaning company, remediation firm, or restoration business. We test. We don’t remediate.
5. Chain of custody: Full chain of custody documentation on every job, from sample collection through laboratory receipt.
6. Methodology: NIOSH 9111 for methamphetamine surface sampling. Published and documented methodology for all contamination types.
7. Insurance: Current Professional Indemnity and Public Liability insurance. Certificates of currency available on request.
8. Reports: Comprehensive written reports including assessor credentials, methodology, photographs, laboratory certificates, interpretation, and recommendations.
9. Methodology explanation: We publish our methodology on our website and explain it in plain language. We welcome questions.
10. Transparent pricing: Written fixed-price quotes before any work begins. No hidden costs.
11. No pressure tactics: We present findings objectively. You make the decisions.
12. Court-ready documentation: Over 24 years of experience preparing documentation that withstands legal scrutiny. Reports prepared to court-admissible standard as a matter of course.

We hold ourselves to these standards not because we’re required to — remember, the industry is unregulated — but because forensic science demands it. If you find another testing company that meets all 12 criteria, engage them with confidence. If they don’t, keep looking.

Getting Started

If you need contamination assessment and want to discuss your specific situation, contact Test Australia for an obligation-free quote. We’ll explain exactly what assessment scope is appropriate for your circumstances, provide a written fixed-price quote, and answer every question on this checklist — and any others you have.