Yeah, I feel the same way. I saw an article somewhere today that said the EPA had done tests on Corexit, and that there shouldn’t be any health concerns...but then the article revealed that the EPA hadn’t actually done tests on Corexit when it’s mixed with oil. Nice to know that on day 72 after it’s already been dumped in the water...
Plenty of tests have already been done by other entities than the EPA (mostly university labs doing environmental studies of various sorts). At least some of this data can be located on-line. I ran across at least one such study some while back (and no, unfortunately I didn't keep the URL).
All the EPA work will do is cross-check the above studies.