Can a site be released (No Further Action) based on field measurements alone?
In some cases, yes. There are field measurement systems that, with the proper in-field QA/QC protocols in place, can be expected to produce data that are of the same or better analytical quality than one would obtain from a fixed laboratory using standard techniques. However, close communication and negotiation with the regulator during systematic planning will generally be required to determine relevant regulatory requirements and what level of reassurance the regulator will wish to see in the site closure data set.
