Phase 1 of this research project established a national network of  23 land application plots across the US, where soil PFAS concentrations were determined. This allowed for the potential of  indirect exposure to PFAS via contamination of groundwater to be evaluated. Phase 2 will evaluate the indirect route of exposure to PFAS from the ingestion of foodstuffs from crops grown on land application plots. To do this we will establish a national network of plant uptake data across the US by growing crops on the 23 land application plots already studied. This will allow for the creation of paired data sets of soil and crop PFAS concentrations. Multiple crop types will be grown including for example corn, oats and alfalfa. This will evaluate differential plant uptake of different PFAS analytes by different crops. In addition, planting the same crop at different national locations will allow for the influence of different soil types and climate regimes on plant uptake to be evaluated. These data will provide information to farmers as to which crops show the least amount of crop uptake, thereby minimizing exposure to PFAS via ingestion of foodstuffs. This study will be the largest crop uptake study  of its kind in the US.