Edited Sentences: method 2

Of the 72 PPCPs tested for using EPA Method 1694, 15 were initially detected in the soil/biosolids mixtures at concentrations ranging from low parts-per-billion to parts-per-million levels.

of the 72 PPCPs tested for using EPA Method 1694

EPA メソッド1694を用いて試験を行った 72 の PPCPs のうち