The Florida Senate
BILL ANALYSIS AND FISCAL IMPACT STATEMENT
(This document is based on the provisions contained in the legislation as of the latest date listed below.)
Prepared By: The Professional Staff of the Committee on Fiscal Policy
BILL: CS/CS/SB 1258
INTRODUCER: Fiscal Policy Committee; Transportation Committee; and Senator Trumbull, and others
SUBJECT: Use of Phosphogypsum
DATE: April 14, 2023 REVISED:
ANALYST STAFF DIRECTOR REFERENCE ACTION
1. Price Vickers TR Fav/CS
2. Carroll Rogers EN Favorable
3. Price Yeatman FP Fav/CS
Please see Section IX. for Additional Information:
COMMITTEE SUBSTITUTE - Substantial Changes
I. Summary:
CS/CS/SB 1258 authorizes the Florida Department of Transportation (FDOT) to undertake
demonstration projects using phosphogypsum from phosphate production in road construction
aggregate material.
The bill authorizes the FDOT to conduct a study to evaluate the suitability of using
phosphogypsum as a construction aggregate material. The FDOT may consider any prior or
ongoing studies of phosphogypsum’s road suitability. The study and a determination of
suitability must be completed by April 1, 2024.
Upon the FDOT’s determination of suitability, the bill authorizes the use of phosphogypsum
from phosphate production as a construction aggregate material in accordance with the
conditions of the United States Environmental Protection Agency’s approval for such use.
Lastly, the bill provides that phosphogypsum placed in a phosphogypsum stack system permitted
by the FDEP or used in accordance with an allowed use expressly specified in EPA regulations
or pursuant to an express EPA approval for the specific use is not solid waste and is an allowable
use in this state.
The FDOT is expected to incur costs associated with conducting the study required by the bill,
which costs are expected to be absorbed within existing resources. See the “Fiscal Impact
Statement” heading.
BILL: CS/CS/SB 1258 Page 2
The bill takes effect July 1, 2023.
II. Present Situation:
Phosphogypsum Stacks
The production of fertilizer from phosphoric rock is a major industry in Florida. Unfortunately,
the process results in wastewater and byproducts that are difficult to manage. The process
produces phosphoric acid, wastewater, and gypsum to produce a slurry that is pumped to the top
of a stack of gypsum. There, it is held until it seeps below and is redistributed to cooling ponds.
It is critical that this acidic water not overflow the reservoir on the top of the stack or the cooling
ponds. A phosphate plant relies heavily on its system of pipes and pumps to distribute the acidic
water so as to prevent overflows, particularly during heavy rains.1
According to the United States Environmental Protection Agency (EPA):
Phosphogypsum is a solid waste2 byproduct that results from processing
phosphate ore to make phosphoric acid that is later used in fertilizer.
Because the phosphate ore contains uranium and radium, phosphogypsum
also contains these radionuclides. The radium is of particular concern
because it decays to form radon, a cancer-causing, radioactive gas.3
Florida Polytechnic University’s Florida Industrial and Phosphate Research Institute (FIPRI)
notes that there are about one billion tons of phosphogypsum stacked in 24 stacks4 in Florida
and, each year, about 30 million new tons are generated.5 Stacking became necessary, according
to the FIPRI, as a matter of legal necessity when the EPA banned the use of phosphogypsum in
1989. The EPA subsequently allowed the lawful removal and distribution of phosphogypsum
from a stack for outdoor agricultural purposes,6 for indoor research and development,7 and for
other purposes under certain conditions.8
Phosphogypsum may not be lawfully removed from a stack and distributed or used for any
purposes not expressly specified in the provisions for outdoor agricultural use and for indoor
research and development.9 A request that EPA approve distribution and/or use of
phosphogypsum for any other purpose must be submitted in writing containing specified
1
Failure of phosphogypsum stacks can occur for other reasons; e.g., see wfla.com, Stacks, water and waste: What the Piney
Point leak means for Tampa Bay | WFLA (last visited March 8, 2023).
2
Under the EPA’s rules, “phosphogypsum” is defined as the solid waste byproduct which results from the process of wet
acid phosphorus production. 14 C.F.R. §61.20(1)(b).
3
See epa.gov, Subpart R: National Emission Standards for Radon Emissions From Phosphogypsum Stacks | US EPA (last
visited March 7, 2023).
4
Section 403.4154(1)(d), F.S., defines “phosphogypsum stack” as any defined geographic area associated with a phosphoric
acid production facility in which phosphogypsum is disposed of or stored, other than within a fully enclosed building,
container, or tank.
5
See fipr.floridapoly.edu, Phosphogypsum Stacks (floridapoly.edu) (last visited March 7, 2023).
6
40 C.F.R. §61.204.
7
40 C.F.R. §61.205.
8
40 C.F.R. §61.206.
9
40 C.F.R. §61.206(a).
BILL: CS/CS/SB 1258 Page 3
information. A request may be approved by the Assistant Administrator for Air and Radiation if
he or she determines that the proposed distribution and/or use is at least as protective of public
health, in both the short term and the long term, as disposal of phosphogypsum in a stack or a
mine.10 If a request is granted, each of the following requirements must be satisfied:
 The owner or operator of the stack from which the phosphogypsum will be removed must
annually determine the average radium-226 concentration at the location in the stack from
which the phosphogypsum will be removed, as specified;
 All phosphogypsum distributed in commerce by the owner or operator of a phosphogypsum
stack, or by a distributor, retailer, or reseller, or purchased by the end-user, shall be
accompanied at all times by specified certification documents;11 and
 The end-user of the phosphogypsum must maintain specified records.12
EPA Approval for Use in Road Construction and Subsequent Withdrawal
On October 14, 2020, the EPA approved a request from The Fertilizer Institute (TFI) to allow
phosphogypsum to be used in government road construction projects, subject to certain terms
and conditions.13 Effective July 7, 2021, the EPA withdrew its approval: “Upon further review,
EPA has determined that the approval was premature and should be withdrawn because the
request did not contain all of the required information. With this action, phosphogypsum remains
prohibited from use in road construction projects.”14
TFI responded:
Importantly, the EPA withdrew the PG [phosphogypsum] road base
approval based solely on procedural grounds, and its withdrawal did not
contradict TFI’s robust risk assessment in support of the use of PG in road
construction. In fact, the decision to withdraw the categorical approval to
use PG in road construction definitively left the window open for site
specific projects to be considered for EPA approval based on the same
scientific merits which focus on safe, sustainable use. We concur with
EPA’s scientific evaluation and conclusion that the risk associated with
the use of PG in road construction is no greater than stacking the material
or placing it in mines.
TFI will continue to work with the EPA and other stakeholders so that the
United States can join with the numerous countries throughout South
10
40 C.F.R. §61.206(c).
11
Those that conform to 40 C.F.R. § 209(c).
12
40 C.F.R. §61.206(d).
13
See the EPA New Release, EPA Approves Use of Phosphogypsum in Road Construction | US EPA (last visited March 13,
2023). To review the terms and conditions, see the EPA letter to The Fertilizer Institute, October 14, 2020, available at
document (epa.gov) (lasts visited March 13, 2023). To review The Fertilizer Institute’s supporting documents, see EPA,
Request to Use Phosphogypsum in Government Road Projects: Supporting Documents | US EPA (last visited March 13,
2023).
14
See 86 F.R. 35795, available at Federal Register :: Withdrawal of Approval for Use of Phosphogypsum in Road
Construction (last visited March 13, 2023).
BILL: CS/CS/SB 1258 Page 4
America, Asia, Europe, Africa, and Canada that permit the safe and
environmentally conscious beneficial use of PG.15
Other stakeholders are awaiting the outcome of TFI’s ongoing efforts to achieve EPA approval
of the use of phosphogypsum in road construction.
Florida Department of Environment Protection Phosphogypsum and Solid Waste
Management Programs
The Florida Department of Environmental Protection’s (FDEP’s) Phosphogypsum Management
Program administers and implements industrial wastewater permitting, compliance, and
enforcement activities for the phosphate industry and regulates the design, construction,
operation, and maintenance of phosphogypsum stack systems. Ensuring the proper closure and
long-term monitoring and maintenance of those systems which have shut down, or which are
otherwise required by rule to be closed, is the goal of the program.16
The FDEP issues permits for construction, operation, and closure of stack systems17 and permits
for discharge to surface waters under the National Pollutant Discharge Elimination System, as
authorized by the EPA.18 The FDEP also administers financial responsibility requirements
intended to guarantee that owners and operators have the financial ability to properly close and
manage phosphogypsum stack systems.19
The FDEP’s Solid Waste Section of the Permitting and Compliance Assistance Program is
charged with responsibility for rule development, solid waste policy, financial assurance
compliance, and implementing the state’s solid waste management program.20 FDEP district
offices receive technical assistance regarding the permitting, compliance, and enforcement
activities associated with solid waste facilities. Such facilities can include landfills, material
recovery facilities, transfer stations, composting and processing facilities, and waste tire
management sites. The district offices manage permitting, compliance, and enforcement issues
associated with such sites.21
The term “solid waste” is defined in Florida law to mean sludge22 unregulated under the federal
Clean Water Act or Clean Air Act, sludge from a waste treatment works, water supply treatment
plant, or air pollution control facility, or garbage, rubbish, refuse, special waste, or other
15
See tfi.org, TFI Statement on EPA Phosphogypsum Decision | TFI | The Fertilizer Institute (last visited March 13, 2023).
16
For additional information, see floridadep.gov, Phosphate Management Program | Florida Department of Environmental
Protection (last visited March 13, 2023).
17
See ss. 403.4154 and 403.4155, F.S.
18
The NPDES is a permit program that addresses water pollution by regulating point sources that discharge pollutants to
waters of the U.S., created in 1972 by the Clean Water Act. The EPA authorizes state governments to perform many
permitting, administrative, and enforcement aspects of the program. For more information, see epa.gov, National Pollutant
Discharge Elimination System (NPDES) | US EPA (last visited March 16. 2023).
19
Id.
20
Section 403.705, F.S.
21
See floridadep.gov, Solid Waste Section | Florida Department of Environmental Protection (last visited March 16, 2023).
22
“Sludge” includes the accumulated solids, residues, and precipitates generated as a result of waste treatment or processing,
including wastewater treatment, water supply treatment, or operation of an air pollution control facility, and mixed liquids
and solids pumped from septic tanks, grease traps, privies, or similar waste disposal appurtenances. Section 403.703(34), F.S.
BILL: CS/CS/SB 1258 Page 5
discarded material, including solid, liquid, semisolid, or contained gaseous material resulting
from domestic, industrial, commercial, mining, agricultural, or government operations, excluding
certain recovered materials and post-use polymers.23
The FDEP currently may not regulate the following wastes or activities:
 Byproduct material, source material, and special nuclear material, the generation,
transportation, disposal, storage, or treatment of which is regulated under chapter 404 or the
federal Atomic Energy Act of 1954, ch. 1073, 68 Stat. 923, as amended.
 Suspended solids and dissolved materials in domestic sewage effluent or irrigation return
flows or other discharges which are point sources subject to permits pursuant to chapter 403,
F.S., concerning environmental control, or s. 402 of the Clean Water Act, Pub. L. No. 95-
217.
 Emissions to the air from a stationary installation or source regulated under chapter 403, F.S.,
concerning environmental control, or the Clean Air Act, Pub. L. No. 95-95.
 Drilling fluids, produced waters, and other wastes associated with the exploration for, or
development and production of, crude oil or natural gas which are regulated under Chapter
377, F.S.
 Recovered materials, post-use polymers, recovered materials processing facilities, or
pyrolysis facilities, except as provided and under specified conditions.
 Industrial byproducts, under specified conditions.24
Additionally, sludge from an industrial waste treatment works that meets certain exemption
requirements is not solid waste as defined in s. 403.703, F.S.
Phosphogypsum is a solid waste as defined in current law and is regulated in Florida pursuant to
waste and industry-specific requirements25 and the FDEP’s rules and permitting requirements.26
The FDEP advises that while phosphogypsum is currently defined as a solid waste,
“phosphogypsum stack systems are not regulated as solid waste management facilities, as they
are separately regulated under the FDEP’s rules for siting, construction, operation, closure and
long-term care of phosphogypsum stack systems in Florida.”27
Florida Department of Transportation Road Construction Material
Generally speaking construction aggregate materials are mined resources that provide the basic
material for concrete, asphalt, and road base. The Florida Department of Transportation’s
(FDOT’s) rule defines the term “aggregate” to mean a granular construction material such as
sand, limerock, limestone, gravel, shell, slag, and crushed stone; manufactured materials such as
shales, slates, and clays; and recycled material such as crushed concrete used as specified, or for
23
Section 403.703(35), F.S.
24
Section 403.7045(1), F.S.
25
See ss. 403.4154 and 403.4155, F.S.
26
Chapters 62-672 and 62-673, F.A.C.
27
See FDEP email to committee staff, March 16, 2023 (on file in the Senate Transportation Committee).
BILL: CS/CS/SB 1258 Page 6
other construction materials and uses not yet developed, but which may have potential usage by
the FDOT.28
The FDOT has implemented a standardized method for producers of construction aggregates to
apply for, receive, and maintain FDOT approval of construction aggregate sources for use on
FDOT projects. The FDOT’s primary methods of determining acceptability of aggregate are
source and product approval, and maintenance of an on-going quality control program as
monitored by the FDOT.29
Current law reflects legislative intent that the FDOT continue to expand its current use of
recovered materials in its construction programs.30 The Legislature declares it to be in the public
interest to find alternative ways to use certain recyclable materials that currently are part of the
solid waste stream and that contribute to problems of declining space in landfills.
To determine the feasibility of using certain recyclable materials for paving materials, the FDOT
may undertake demonstration projects using the following materials in road construction:
 Ground rubber from automobile tires in road resurfacing or subbase materials for roads;
 Ash residue from coal combustion byproducts for concrete and ash residue from waste
incineration facilities and oil combustion byprod