Private organizations which, for a fee, will conduct an objective analysis of a product or process. Using scientific methods and accepted engineering practices, these organizations subject products or processes to laboratory tests.
There are some testing laboratories that, to some degree, engage in the analysis of petroleum marketing equipment. Others test leak detection devices. And there are other testing organizations, many of which operate in local markets, that test soil and water samples for contamination. These local organizations are widely used by tank-removal contractors and environmental firms.
See also Third party certification.