FORT LAUDERDALE, FL — (Marketwire) — 03/19/12 — SEACOR Holdings Inc. (NYSE: CKH) today announced that it closed its previously announced agreement to sell a portion of its environmental business to J.F. Lehman & Company, a leading middle-market private equity firm focused on the defense, aerospace and maritime sectors. The businesses sold included National Response Corporation (NRC), one of the largest providers of oil spill response services in the United States; NRC Environmental Serv
