STANDARD INDUSTRY METH TESTS
1. Presumptive Testing
Calibrated and validated at 0.5 micrograms, Swabs are taken using a 100cm2 template and mixed with a buffer solution that is dropped into a results cassette.
Pros: This test will provide a Yes/No result within minutes
Cons: Because all samples are yes/no result there is no way of knowing contamination levels, so there is a need to gather individual samples if the contamination levels are to be known
2. Field Composite
In a Field Composite test, the sampler takes multiple samples from throughout the property and inserts the swabs into a single test tube.
The purpose of the test is to advise the client whether there is any trace of methamphetamine present and if there is a need for further investigation.
Pros: As the sampling company is only being charged for sending minimal test tubes to the laboratory the cost to the client is relatively low.
Cons: Because all samples are inserted into the same sample test tube there is no way of knowing which area holds contamination so there is a need to re-visit the property to gather individual samples if the original test shows contamination.
3. Laboratory Composite
4. Discrete Testing
This type of testing is where a sampler takes individual samples in adherence with NIOSH 9111. The individual samples are sent to the laboratory. The individual samples are then run individually to give you a break-down of contamination in each area.
Pros: Individual analysis of each sample means you know which areas are effected.
Cons: As each sample is analysed there is a laboratory cost for each sample so it is the most expensive type of test.
3. Laboratory Composite
This type of testing is similar to In Discrete testing where a sampler takes individual samples in adherence with NIOSH 9111. The individual samples are sent to the laboratory but instead of being analysed individually they are run in batches of up to ten samples per batch. The laboratory then reports the analysis of each batch and an average result.
Pros: Because the samples are already individually at the laboratory, should the batch show contamination the laboratory can quickly re-run the samples individually to give you a break-down of contamination on each sample without the need for a sampler to re-visit the property.
Cons: Composite sampling does not give you individual sample results, if the result shows higher reading than the Australian guideline even if only one area was contaminated all the individual samples would need to be run to determine the contaminated areas and levels.