(January 5, 2022, 12:12 PM EST) -- HARRISBURG, Pa. — In a 90-page ruling issued Dec. 30, preliminary objections (POs) by Monsanto Co. to allegations of trespass and unjust enrichment were sustained by the Pennsylvania Commonwealth Court while six other objections, including allegations of public nuisance and failure to warn and instruct, were overruled in a dispute over elevated polychlorinated biphenyls (PCBs) in Pennsylvania waterways....