Well, that is listed on the analysis to tell you if there is some heavy metal content. In the case of 1fast400's
Green Tea Powder, the heavy metal concentrations are below certain values. E.g. equal to or below 10 parts per million, meaning the Grean Tea extract powder contains is 0.001% or less heavy metal. If it contained more than 10 ppm, it would list how much. Having 10 ppm or less means that it is far on the good side of safety, not that it contains.
All of these analysis sheets will have a section like this. Heavy metals and solvent residues are *bad* things, not good things, not the goal of extracts. This is specifically covered because heavy metals are especially toxic, even in low concentrations, and knowing that the HM content is this low is to assure you that it's safe. This is very good to know, because supplements have a pretty bad record of being safe or pure, especially the stuff you buy off of a grocery store shelf.
An abstract that might be of interest:
http://64.233.167.104/search?q=cache:1-4hP...us&client=opera 
what's with the heavy metal ingredients?, green tea extract, heavy metals
