The different methods of sampling using a Laboratory.
In New Zealand there are several types of testing methods depending on the clients requirements. These are also referred to by different names throughout the industry which can make the whole thing very confusing. Below is a list of different methods and a breakdown of each one.
Actual Name: Field Composite
Industry Names: Level One, Stage One, Base Test, On Site Test, Screen Test
Not to be confused with: Indicative test kits (kits that show an indication on site)
Breakdown: A Field Composite test is where 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 is 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 and 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
Actual Name: NIOSH: 9111
Industry Names: Comprehensive test, Level Two, Stage Two, In Depth Test, Detailed Test
Not to be confused with: This type of testing is blurred with full reports and other types of sampling such as soil sampling, lead, ph, decontamination notes. This type of reporting is normally done by Laboratories or Occupational hygienists and normally cost in excess of $2000+
Breakdown: NISOH 9111 (link here) is the method in which samples are required to be taken to adhere with best practice. It sets out the way a sample is to be taken, the material of the surface sample, type of substance the gauze is to be soaked in and the size of the sampling area.