doggone, I can totally understand your scenario. When it comes to PCB's my thought is why take the risk? The concentration of PCB's in Crabtree is pretty high. So high in fact the advisory is no fish be kept from that lake. Crabtree Creek runs downstream into the Neuse and there are PCB's found in the whole stretch.
Wake PCB warnings spread | Wake County | Indy Week
Toxic cleanup shifts from dirt near RDU to region’s streams, lakes | News & Observer