I'm not sure if this will help, but it might, so here goes. Not all metals found in soil are toxic. Here in Wisconsin, our native soil is high in iron and aluminum. We also have high levels of calcium and magnesium. There is a lot of limestone around here. Potassium and phosphorous are both metals, found in fertilizer. There are certain metals that are toxic, even in small amounts, and this list includes lead, mercury, and cadmium. There are several metals that are essential nutrients to certain plants, but toxic if present in high concentration, and this list includes copper, nickel, chromium, molybdenum, cobalt and vanadium. It helps to know the pH of the soil. Soils that are high in pH, 7.5 and up, tend to hold onto metals. Soils with a pH of 6.5 or below tend to release metals into solution, where they can be taken up by plant roots. This is a huge subject, and I'm sure that others will add more information.

Thanks, ericwi. I am mostly worried about cadmium and lead (mercury too but the test I ordered doesn't measure mercury).

I know the pH of the NEW soil is 7.6, but haven't tested the old soil (a foot below the new).

Contact the lab that did the test to ask for the answers you need.