A 266-unit affordable apartment project on the drawing board for 10.65 acres on Old Hickory Boulevard in Hermitage would target households earning below 60 percent of that area’s median income. On Tuesday, the Metro Council passed a resolution approving a payment-in-lieu-of-tax (PILOT) agreement related to the estimated $31.48 million Hemitage Flats project, which Elmington Capital Group plans at 5646 Old Hickory Blvd.