. . . "n shows that 67 chemicals, including Agent Orange derivatives, dioxins and PCBs which could have been made only by Monsanto, are leaking from one unlined porous quarry that was not authorised to take chemical wastes.The Brofiscin quarry on the edge of the village of Groesfaen, near Cardiff, erupted in 2003, spilling fumes over the surrounding area, but the community has been told little about the" . .