The laboratory composite meth testing technique offers the best value for clients and is the most used type of test for pre-purchase inspections and baseline tests for rental properties.
Every room within a property is required to be sampled. The price will vary depending on the size of the property. For more info on prices see here.
Up to ten individual samples can be combined as a laboratory composite. In practice, all ten samples are tested in one mixed sample, giving a single result. This is what you see in your report.
The original individual samples are retained by the lab for up to thirty days and can be tested individually if your result indicates that this is necessary.