Black dirt- Lead oxide mix with copper. Need help in finding a buyer for this materia

Hi Guys,

I have Lead oxide and copper "black dirt" as i call it.
I get few thousands # a month of it.
The source is back-trap of shooting ranges.

I send this material to a friend who analyzed it as 75% lead and 21% copper.
The material is dark gray (almost black).



Would you know who can buy this material? i tried locally but no luck.

I have also copper/brass (red and yellow bullet jacket) that is left after melting the lead from the bullets.
Locals do not like to buy this brass as it still show some signs of lead contamination on them.
Is there anyone out there that is willing to take it for a reasonable price?

Any idea will be much appreciated.
Thanks,