, the Piney Point stack encloses wastewater
Borden Chemical opened an industrial plant on the site in September 1966 to process
phosphate, a key ingredient in fertilizer. AMAX sold the plant in 1986 to FCS Energy, which was absorbed into Consolidated Minerals, Inc. By 1988, the plant had changed hands again to Royster Phosphates. In 1989, a leaking storage tank released of
sulfate that prompted evacuations of the area. Two incidents in 1991 released
sulfur dioxide and
sulfur trioxide into the air, killing three workers and creating an acid cloud that caused 30 people to become ill. The
FBI seized company records in 1992. Mulberry Corporation purchased the plant in 1993 when Royster Phosphates declared bankruptcy.
Phil L. Rinaldi was the CEO and the entrepreneur behind the company. Mulberry ceased operations at the plant in 1999 due to a lack of funds. In January 2001, Mulberry abandoned the property just 48 hours after notifying the government that it could no longer afford to assure environmental security, and days before declaring bankruptcy. The Federal
Environmental Protection Agency (EPA) briefly stepped in to oversee the plant, with the property later passing to the
Florida Department of Environmental Protection (FDEP) through a court-appointed receivership. The site was purchased from the government by HRK Holdings, LLC in 2006 for $4.3 million with the requirement that they maintain the phosphogypsum stacks and contaminated wastewater left from the former operations of the plant. In 2011, another spill dumped of contaminated water into Bishop Harbor and Tampa Bay. HRK Holdings filed for
Chapter 11 bankruptcy in 2012 citing expenses from the leak the previous year, when HRK had allowed the Manatee County Port Authority to store materials from the dredging of
Port Manatee's Berth 12 expansion in reservoirs on the property. Portions of the property were sold to Port Manatee, Thatcher Chemical of Florida, Manatee Bulk Storage, and an affiliate of Mayo Fertilizer and Farm Supply as part of bankruptcy restructuring for HRK. The remaining property is leased by HRK as an
industrial park under the name Eastport, with access to Port Manatee, multiple highways, and a
rail yard connected directly to the
CSX mainline. In October, Florida environmental advocacy group ManaSota-88 called on the EPA to investigate the site, calling out "increased the risks of a catastrophic failure of their earthen impoundments". In February 2021, national and regional environmental groups petitioned the EPA, now under the
Biden administration, to raise environmental protections from phosphogypsum stacks in at least 12 states under the
Resource Conservation and Recovery Act and the
Toxic Substances Control Act; well-known groups included
Center for Biological Diversity,
Waterkeeper Alliance, and
Sierra Club. ==2021 incident==