The "Burden" of Contaminated Food

The New York Times article about the FDA block on Chinese dairy products explains that the manufacturer and their customers will have to test their products and share the results with the FDA in order to clear the product. The article quotes Dr. Steven Solomon, FDA deputy associate commissioner.

“We’re taking this action because it’s the right thing to do for the public health,” said Dr. Steven Solomon, an F.D.A. deputy associate commissioner.
As a result, Chinese products that contain milk or milk powder will be detained until the manufacturer or its customer has the product tested and found to be free of contamination, or they show documentation indicating that the product does not contain milk or milk-derived ingredients.
“The burden shifts to the importer,” Dr. Solomon said.

I don't understand how this is supposed to be reassuring to consumers. Lotte Koala cookies and White Rabbit candies were found on store shelves at a discount weeks after they were found to contain melamine, and we are supposed to feel comfortable knowing that manufacturers and possibly distributors are providing the testing our health depends upon? Manufacturers may already be responsible for adulterating their product - and we are supposed to rely on them for testing? Doesn't the NYT article talk about shrimp producers breading refused shrimp to take advantage of loopholes? I understand that there will be enough food blocked up at the ports to wrap around the earth a few times over. But I don't understand why the FDA isn't doing any testing themselves. Or are they? Although he meant burden of proof, Dr. Solomon's choice of words hit the nail on the head: It's a burden. The FDA sees contaminated food as a burden. Yet it is part of the job that they are supposed to be doing. What about the Import Safety Action Plan? The issue is reliability. Who tests, and who examines the results. Will results be publicized? And is testing done accurately and can consumers rely on it?