No doubt pesticide is a big concern on tea as well as many other food.
But generally speaking, tea is safer than a lot of other food. This is not to say pesticide shouldn't be further minimized on tea, but more so on other food, globally.
The Green Peace report didn't give any information about regulation limit of these pesticides. I suppose some of the residue amounts are above EU standards. But according to Chinese Tea Association, most of the products (except one) have pesticide residue well below the Chinese regulation standards. I didn't spend time to look up all the data, but I guess many of them are well below US regulation standards for most foods as well, as EU standards for tea are generally much higher than other countries, and much higher than EU standards for many other foods - but I only looked up a few of the pesticides in the report. Those who are interested may look up some pesticides in the report about their standards on USDA database: http://www.mrldatabase.com/default.cfm?selectedcommoditygroup=438
Most of the products claimed to have banned pesticide has methomyl, which was banned in China in 2011, and is still allowed in many other countries for fruits. (Currently the companies involved claim that residue is not from usage after the ban.)
For example, methoyl maximum allowed amount for peach:
(I picked peach because it has no pod or shell, and therefore I suppose it should reflect a relatively "safer"/strict standard. But oh well, I do agree pesticides are not safe...)
New Zealand: 0.1ppm
(Notice that producing countries tend to have looser regulation limits than importing countries.)
Those found in the products in the report: 0.02-1.1ppm - also consider tea is not completely eaten up as peach. This is not to say we should be happy that tea contains pesticides, but I guess we should be even more unhappy about peaches, and many, many other foods from various countries.
Another example is imidacloprid (the second pesticide in the data table. I didn't find the first one in the database). Again for peach, maximum amount of residue allowed:
New Zealand: 0.1ppm
China: no standard yet
Products in the report contain 0.02-1.4ppm. 1.4ppm sounds really bad to me, but still, not as bad as peaches.
I only took a quick look (because this data mining is exhausting, should have been done by author of the report, not a reader like me... unless Green Peace pay me to do it
), so please correct me if there are errors.
The above numbers are not personal opinion, but straight data.
I know many people tend to judge words not by contents but by who said it. But besides everything else that I am, I'm also a biologist. On science, I hold equal status with Green Peace.