Metals in Mt. Shasta Rainwater

I did some work thinking about an analytical report about high concentrations of Aluminum, Barium and Strontium in rainwater collected from Mt. Shasta. These elements are not found in an analysis of the groundwater from Mt. Shasta. Possibilities include combustion products from Chinese metal smelting/coal burning or spraying from Chemtrails. Open discussion for anyone having other potential sources.