outside the square

I've been sitting on the outside looking in and there appears to me to be two issues, how and why.
Water samples where taken before the burn, you would have been nuts not to have done this, contaminents where considered to be normal.
After the burn started benzene and toulene appears, even if in hardly detectable quantities.
This process uses hydraulic fracturing of the coal so the gas can move to the production bore.
The fluid that is used can contain benzene, has len and his crew made a bad blue in useing a contaminating fluid, as the only bad reading is from a bore near the burn site.
If this is the case we may get a out of jail card.