 The car-sized pieces of fiberglass have already been hauled off Nobadir Beach, but islanders are still finding tiny bits of green foam washing up all along the shoreline. Gavin Norton, owner of Nantucket Surf School, says a swimming closure and continuing fears about what's still in the water have cost him thousands of dollars. It's probably canceled 90% of our lessons for the next few days. Not ideal for a short season in the middle of July, where this is usually our busiest time of the year.