PURPOSE: Step 5: Post Decontamination Assessment is required to verify the effectiveness of the decontamination works, and independently assess all works have been completed in compliance with the New Zealand Standard NZS8510:2017. This is necessary in order for clearance documentation to be issued by the decontamination company.
Sample Collection and Sample plan MUST be signed off by IANZ Accredited Sampler for clearance to be issued.
A sample plan/quote must be submitted to the client for acceptance before the commencement of the assessment
Properties will need to meet the requirements of Step 3: Detailed Site Assessment and Step 5: Post Decontamination Assessment criteria in order for property clearance to be issued.
Laboratory Composite Within a Single Area
If all potential maximum concentrations DO NOT exceed (1.5µg/100cm2), Property Clearance Documentation will be issued.
If “Potential Maximum” traces within a single area are above the limits of the Standard (1.5µg/100cm2) the following options apply:
Individual Analysis of some or all of the composite
Return to Step 4 (Further Decontamination)
WARNING: Employing a sampling company that is not IANZ Accredited for Post Decontamination Assessments, means the final clearance documentation DOES NOT MEET THE REQUIREMENTS OF NZS8510:2017.
Failure to meet these requirements may result in a requirement to re-test and re-decontaminate, resulting in additional work and expense. If Property Clearance Documentation is not correctly obtained, the contamination may remain on the LIM.
You are at Step Five of the Methamphetamine Assessment Ladder
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A sampling plan / quote is compiled by an IANZ Accredited Sampler, in order to compile a sampling plan sufficient for property clearance. Areas are assessed as per NZS8510:2017 Section 3.3 and Section 5 criteria. Areas that meet these requirements are deemed as successfully decontaminated.
This assessment gathers relevant information such as room size, and materials. Once the sampling plan has been accepted by the client, samples are collected from necessary areas that have not met the requirements of the New Zealand Standard and then analysed and reported on.
Is there any contamination left after cleaning?
Following the clean up, this test tells us if any meth contamination remains after the Step 4: Decontamination process is complete.
The test adheres to the NZS 8510:2017 Standards and provides a numerical value to indicate hazardous levels contained within your property.
Further Lab Based Samples are taken, ensuring the property is now free of methamphetamine contamination and levels are below the NZS 8510:2017 Standards.
This test is conducted in conjunction with the meth-testing and decontamination standard NZS 8510:2017. We use IANZ accredited labs to test the samples.
With this test you receive a comprehensive Post-Decontamination Assessment Report stating any remaining levels of toxic contamination in each room and recommendations on any further remediation (if any) that may be required for the property.
This report can then be passed on to the previously used or a new clean up/decontamination companies who will provide a quote and scope of work for the process.
Sampling and/or assessment costs vary based on the number of rooms needing to be tested, we are happy to discuss and quote on a case by case basis.
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