I have about a cubic yard of Dyno Dirt( reclaimed and aged sewage , now dirt) from Denton, Texas. My veggie garden is 25' by20' and a greenhouse floor area. Had to tear it down here in tornado country. I'd like to mix in that Dyno Dirt for planting rows of veggies. How can I tell if the Dirt is too hot for my veggies, When I plant. Is there a test?