"Latest finding is 504 ug/l in rain gauges as of 11/03/10, with moderate chemtrails." (Francis Mangels)
http://uncensored.co.nz/2011/03/07/chemtrail-lab-reports/#comments

Further Source: Francis Mangels, Scientist, Bachelor’s in Forestry, Masters in Zoology
http://globalskywatch.com/chemtrails/ubbthreads.php?ubb=showflat&Number=8622#Post8622

And: http://globalskywatch.com/reference/chemtrails-geoengineering/Francis-Mangels-Observations.html