Unless the flax is planted, cultivated, and harvested without the use of internal combustion engines, PCBs will be detectable in it.
“Unless the flax is planted, cultivated, and harvested without the use of internal combustion engines, PCBs will be detectable in it.”
How so? - Where would the PCB be coming from? - It has been illegal in motor fuels and lubricants since 1971.
PCB usually only comes from contaminated vessels in chem plants.