"National Weather Service plastic rain gauge on a 7’ pole in Mt. Shasta shows 500-1010 ug/l aluminum, with highest amounts after a heavy contrail week. With no contrails, it drops to about 30-50 ug/l aluminum in the rain at several stations." (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