Appendix
A-1
PHOSPHODRUS LIMIT FOR INFLOWS INTO EVERGLADES NATIONAL PARK
Attachment I describes interim and long term total phosphorus
limits for the combined inflow to Shark River Slough. These limits
shall apply to the annual Water Year (October 1 - September 30)
flow-weighted-mean concentration of inflows to Shark River Slough,
composited across all structures, including S-12A, S-12B, S-12C,
S-12D, S-333, and any subsequent inflow points from the WCAs
established in the future. Attachment II describes long term
discharge limits which will apply to the combined inflow to the
Taylor Slough (S-332 and S-175) and Coastal (S-18C) basins. In
each, long term discharge limits are the limits necessary to
meet the OFW water quality criteria as measured at the structures
discharging into the Park. These limits will also apply to areas
immediately downstream in the Park and will be used to determine
compliance. The adequacy of these OFW criteria to meet the State
water quality standard Class III criteria (to prevent an imbalance
of flora and fauna) will be verified by long term monitoring and
research.
If research to determine the numeric value for the Class III
narrative nutrient criteria results in a more stringent Park
phosphorus limit, then the more stringent inflow limit shall apply.
Appendix A-2
Effective dates for the phosphorus inflow limits are as follows:
| Water Body |
Effective Dates |
| Shark River Slough - Interim Limits |
July 1, 1997 |
| Shark River Slough - Long-term Limits |
July 1, 2002 |
Taylor Slough and Coastal Basins
- Long Term Limits |
July 1, 2002 |
Phosphorus limits apply to flow-weighted-mean concentrations
computed on an annual Water Year basis, with data reported and
calculated on a monthly basis. To account for hydrologic
variations in Shark River Slough, the limits vary with the previous
12-month's total flow in each basin. The long term limit for
Taylor Slough and the Coastal Basin is fixed and does not vary with
flow. The limits represent the 10% rejection level of the observed
flow-weighted-mean concentration at a given total annual flow,
adjusted to a baseline time period of March 1, 1978 to March 1,
1979 for Shark River Slough (OFW baseline). The baseline time
period for the Taylor Slough and Coastal Basins is Water Year 1984.
Compliance with these limits is expected to provide a long term
average flow-weighted-mean inflow concentration of approximately 8
ppb for the Shark River Slough Basin and 6ppb for the Taylor
Slough and Coastal Basins. Approximate values are as follows:
|
Dry Year
(117 Kac-ft/yr) |
Wet Year
(1061 Kac-ft/yr) |
| Shark River Slough-Interim Limits |
|
|
| Flow-Weighted Mean |
< 14 ppb |
< 9 ppb |
| Shark River Slough-Long Term Limits |
|
| Flow-Weighted Mean |
< 13 ppb |
< 8 ppb |
| Taylor Slough & Coastel Basins- Long Term Limit is 11 ppb. |
Appendix A-3
Frequency of samples exceeding 10 ppb within a given 12-month
period have also been developed to aid in tracking compliance.
Approximate values are as follows:
|
Dry Year |
Wet Year |
| Shark River Slough - Frequency Exceedance |
|
| Frequency > 10 ppb |
< 70% |
< 40% |
| Taylor Slough & Coastal Basin - Frequency Exceedance must be |
< 53%. |
Precise values for the Shark River Slough flow-weighted-mean
concentration limits and the frequency at which 10ppb can be
exceeded can be calculated for a given annual flow using the
equations given in Attachment I.
A panel of scientists designated by the TOC will track and
evaluate compliance with all aspects of state water quality
standards including the phosphorus limits, concentration levels and
criteria. The represented agencies may request technical
assistance from others.
After each additional sampling round at intervals of every
other week, the flow-weighted mean will be calculated based upon
data from the previous 12 months and compared with the limits
corresponding to the previous 12 month's total flow. If the
flow-weighted-mean limit is exceeded, the panel will be convened to
review recent monitoring data and assess potential causes. Any
agency represented on the TOC may request an official review of the
monthly mean and frequency calculations for potential violations of
the phosphorus limits during the water year.
An exceedance occurs if the flow-weighted-mean concentration
for the water year ending September 30th is greater than the 10%
rejection level of the computed limit (see Attachments). Based
Appendix A-4
upon review of trends for flow-weighted means, trends for the
frequencies of samples exceeding 10 ppb, and other information
found relevant by the panel, the TOC members will forward their
opinions and recommendations to their respective agencies for
appropriate action. An exceedance will constitute a violation
unless the TOC determines there is substantial evidence that it is
due to error or extraordinary natural phenomena. A violation of a
long term limit shall constitute a violation of this Agreement and
of the OFW water quality standard for Park areas immediately
downstream of the inflow structures.
Appendix A-5
Attachment I - Discharge limits and ORW Standards for Shark River
Slough
Interim Discharge Limit:
C = 11.16 - .00465*Q + 1.397*sqrt;[6.377 - .00591*Q + .00000436*Q2]
Long-Term Discharge Limit & OFW Standard:
C = 11.38 - .00538*Q + 1.397*sqrt[2.493 - .00231 + .00000170*Q2]
Frequency Exceedance:
F = 48.411 - 0.02896*Q + 1.397*sqrt[330.1 - 0.3071*Q + 0.0002254*Q2]
Terms:
Water Year = October through September
Q = total inflow to Shark River Slough for water year, S-12s +
S-333 + any additional inflow from the WCAs established in the
future, thousand acre-ft/yr (Kac-ft/yr).
C = limit on maximum flow-weighted-mean inflow concentration for
any Water Year, composite of all inflows to Shark Slough (ppb).
F = exceedance for maximum frequency (percent) of inflow
concentrations exceeding 10 ppb, computed from the time series of
concentrations composited across all inflow structures on each
sampling date with positive flow in a given Water Year.
The range of flow (Q) used in deriving the limits is 117 to
1061 Kac-ft /yr. If the total flow for any water year exceeds 1061
Kac-ft/yr a flow of 1061 Kac-ft/yr should be used in calculating
the discharge limits.
Appendix A-6
Attachment II - Discharge limits and OFW Standards for Taylor
Slough and Coastal Basin
Long-Term Flow-weighted Discharge Limit & OFW Standard = 11.0 ppb
Frequency Exceedance:
Frequency of values > 10 ppb must be less than 53.1%.
Terms:
Limits are defined on a Water Year basis, October through
September.
Basin flow is the total flow through structures S-332, S-175,
S-18C, plus any new release points from this basin established in
the future, thousand acre-ft/yr (Kac-ft/yr).
Limits apply to the flow-weighted-mean concentration for any Water
Year, composite of all inflows to Taylor Slough (S-332) and Coastal
Basin (S-18C).
Frequency exceedance is the exceedance for maximum frequency
(percent) of inflow concentrations exceeding 10 ppb, computed from
the time series of concentrations composited across all inflow
structures on each sampling date with positive flow in a given
Water Year.
Appendix
B-1
APPENDIX B
PHOSPHORUS LEVELS AND DISCHARGE LIMITS FOR LOXAHATCHEE
NATIONALWILDLIFE REFUGE
Attachments I and II describe interim and long term total
phosphorus concentration levels for the 14 Loxahatchee National
Wildlife Refuge interior marsh stations. These concentration
levels shall apply to monthly samples collected at 14 interior
stations (CA1-3 to CA1-16) (map attached) when the average stage at
the CA1-7, CA1-9, and CA1-8C gauges is greater than 15.4 feet msl
(mean sea level). Phosphorus concentration levels apply to
individual sampling date means. Sample date means represent
geometric means, calculated from measurements at all of the 14
stations with sufficient water for accurate sampling. To account
for the observed correlation between marsh total phosphorus
concentration and stage, the concentration levels vary with the
average interior stage on the date of sample collection. Effective
dates for the phosphorus concentration levels are as follows:
|
Effective Date |
Interim Marsh Concentration Level
(14 station geometric mean) |
July 1, 1997
|
Marsh = Class III Standard
(Applies to entire marsh)
or
|
July 1, 2002
|
Lon-Term Concentration Level
(14 station geometric mean) |
|
Appendix B-2
Interim Concentration Levels
The interim levels represent the 10% rejection level of the
observed 14 station interior marsh mean concentration at a given
mean daily stage, adjusted to a baseline time period of June 1978 -
to June 1979. Compliance with these concentration levels is
expected to provide a long term mean 14 station interior marsh
concentration of approximately 10 ppb. Interim values for the 14
station mean concentration levels can be calculated for a given
mean daily stage using the equations given in Attachment I.
Approximate values are as follows:
|
Low Stage
(15.42 ft msl) |
High Stage
(17.14 ft msl) |
| Interior Marsh |
|
|
| Interior Concentration Levels |
22 ppb |
8 ppb |
| (14 station geometric mean) |
|
|
The current control program, consisting of on-line STAs and
BMPs, as described in Appendices C and E, is designed to achieve a
long-term average annual flow-weighted concentration of 50 ppb for
each discharge to the Refuge and WCAs from the EAA. If the
interim, or the lower of the long-term Refuge interior marsh
station concentration levels or Class III criteria, are not met
with the current control program, DER will require additional
components to be added to the control program to meet a maximum
annual discharge limitation of 50 ppb for all discharges into the
Refuge from the EAA. The range of additional components will
include increased STA acreage, more intensive management of STAs,
a stronger regulatory program, or a combination of the above, based
on actual performance achieve with the initial STA design and
Appendix B-3
operation and the actual performance of BMPs as discussed in
Appendices C and E. The State Parties shall not implement more
intensive management of the STAs as the sole additional component.
DER will modify the permit for the operation of the Refuge inflow
structures to include the additional components of the control
program and to establish 50 ppb as a maximum annual discharge
limitation which would be enforceable after the additional
components are operational.
Class III Criteria
The numerical interpretation of the Class III criteria for
total phosphorus for the Refuge shall be determined by a research
program designed by a panel of scientists designated by the
Technical Oversight Committee. The research program must be
recommended by the TOC. Such research shall begin no later than
July 1, 1992 and a final report shall be completed no later than
July 1, 1997. The purpose of the research will be to determine
water column total phosphorus concentrations above which imbalances
in populations of the natural flora and fauna within the Refuge
will occur and to determine the numerical interpretation of the
Class III nutrient criterion for total phosphorus. Effective July
1, 2002, the long-term total phosphorus concentration levels for
the Refuge will be the 10% refection level of stations CA1-5, CA1-6
and CA1-16 at a given mean daily stage. These three stations had
the lowest geometric mean total phosphorus concentrations during
the 1978-1983 baseline period. The long term concentration levels
will apply to all 14 stations. Compliance with these concentration
Appendix B-4
levels is expected to provide a long term average 14 station
interior marsh concentration of approximately 7 ppb. Precise
values for the levels can be calculated for a given mean daily
stage using the equations given in Attachment II. Approximate
values are as follows:
|
Low Stage
(15.42 ft msl) |
High Stage
(17.14 ft msl) |
Interior Marsh - Long Term
Concentration Levels |
17 |
7 |
| (14 station geometric mean) |
|
|
If the TOC determines Class III total phosphorus concentration
levels are lower than the long term total phosphorus concentration
levels then the lower levels shall apply.
With respect to STA-1, the original design, in operation by
1997, will include an effective treatment area of 7400 acres. The
remaining acreage (4400 effective treatment area acres plus
approximately 290 acres for berms, etc.) will be placed in service
if the Refuge's long term concentration levels have not been met by
the July 1, 2000. If the lower of t he Class III or long-term
levels is not met by the July 1, 2002 and the 50 ppb maximum annual
discharge limit is being met at all inflow structures into the
Refuge from the EAA, the TOC will recommend a lower maximum annual
discharge limit for the structures to be enforced by DER.
Additional actions, such as regulatory measures and increased STA
acreage, as appropriate from the empirical data on performance of
each program, will be required by either DER or the District to
meet the lower discharge limit.
Appendix B-5
COMPLIANCE REVIEW
A panel of scientists designated by the TOC will track and
evaluate compliance with all aspects of state water quality
standards including the phosphorus limits, concentration levels and
criteria. The represented agencies may request technical
assistance from others.
An exceedance occurs if the 14 station mean concentration is
greater than the computed concentration level two or more times in
any 12 consecutive sample collections. Based upon review of
monthly trends for the 14 station mean and other relevant
information, the TOC members will forward their opinions and
recommendations to their respective agencies for relevant action.
An exceedance will constitute a violation of this Agreement and
relevant water quality criteria unless the TOC determines there is
substantial evidence that it is due to error or extraordinary
natural phenomena.
If fewer than three sampling date geometric means collected
within the past 12 consecutive sampling periods are below the mean
baseline period, then the panel will be convened to review
monitoring data and assess the potential causes and recommend
changes in the total phosphorus levels as necessary to meet the
objectives of this Agreement.
Appendix B-6
Attachment I - Interim Marsh Concentration Levels for Loxahatchee
National Wildlife Refuge
Interim Marsh Concentration Levels:
C=11.9187 - .603261*S + 1.372*sqrt[7.5311 - .9247*S + .02882758*S2]
Terms:
C = The natural log of the geometric mean total phosphorus
concentration across 14 marsh stations (CA1-3 to CA1-16).
S = Average stage measured at gauges CA1-9, CA1-7, and CA1-8C on
sampling date (feet)
This equation is applicable over a stage range of 15.42 to
17.14 feet. If the stage on any sampling date exceeds 17.14 feet,
concentration levels. The concentration levels should not apply to
dates when the average stage is less than 15.42 feet.
Appendix B-7
Attachment II - Long Term Marsh Concentration Levels for
Loxahatchee National Wildlife Refuge
Long Term Marsh Concentration Levels:
C = 10.7172 - .541156*S + 1.372*sqrt[7.5819 - .9310*S .02902216*S2]
Terms:
C = The natural log of the geometric mean total phosphorus
concentration across 14 marsh stations.
S = average stage measured at gauges CA1-9, CA1-7, and CA1-8C on
sampling date (feet)
This equation is applicable over a stage range of 15.42 to
17.14 feet. If the stage on any sampling date exceeds 17.14 feet,
a stage of 17.14 feet should be used in calculating the long term
concentration levels. The equation shall not apply to dates when
the average stage is less than 15.42 feet.
Appendix
C-1
APPENDIX C
STORMWATER TREATMENT AREAS (STAs)
The control program described below and in Appendix E is
anticipated to meet interim and long term concentration levels and
limits for Everglades National Park (Park) and Loxahatchee National
Wildlife Refuge (Refuge). The control program is designed to
achieve approximately and 80% reduction in phosphorus loads from the
Everglades Agricultural Area (EAA) to the Everglades Protection
Area (EPA) by July 1, 1997 and greater than an 85% reduction in
phosphorus loads to the Refuge by July 1, 2002, relative to average
annual loads measured in Water Years 1979 through 1988. This
objective can be achieved through the combined use of agricultural
best management practices (BMPs) and stormwater treatment areas
(STA's) designed and operated to maximize phosphorus removal.
Key assumptions for sizing STAs:
The sizes and locations of the STAs have been determined based
upon the following assumptions:
1) It is assumed that the BMP Regulatory program will
achieve a 25% load reduction from each EAA watershed. The 25%
load reduction will be assured through performance limitations
associated with the BMP Regulatory Program. This represents
a realistic estimate of the efficiency of a BMP program in
removing phosphorus based upon BMP research conducted by the
Institute of Food and Agricultural Science.
2) It is assumed that water retention (i.e. water lost to
surface water flow downstream from the EAA) due to
Appendix C-2
implementation of BMPs will equal 20% of the total base flow
that was discharged from the EAA from 1979 through 1988.
3) Based upon worldwide experience with whole-system wetland
treatment areas, the STAs should be capable of removing
approximately 70% of their influent phosphorus loads. A
further load reduction of approximately 6% is expected to
result from conversion of existing agricultural lands into
STAs. The combined load reductions attributed to land-use
changes (6%), BMP's (25%) and STAS (70%) applied in series can
therefore be reasonably expected to achieve a total reduction
of approximately 80% relative to the amount of phosphorus that
was historically discharged from the EAA in the EPA.
4) It is assumed that an effective settling rate for total
phosphorus of 8 meters/yr will characterize phosphorus uptake
within the STAs. This settling rate is based upon historical
uptake rates estimated for the WCA-2A system (which is not
managed to maximize nutrient uptake) and is supported by long-
term performance data from wetland treatment systems
worldwide.
5) The initial size calculations are based on the assumption
that the volume of flows experienced during the 1979 to 1988
base period from each tributary basin would be treated with no
hydraulic bypass during storm events (i.e. all water gets
treated).
6) For modeling purposes, the historic nutrient load and
flow from each basin was reduced to account for (a) low-flow
Appendix C-3
water-supply deliveries (canal flows released from Lake
Okeechobee which do not impact WCA marshes) and (b) land taken
out of agricultural use for construction of the treatment
systems.
7) The long term average performance of the STAs is
predicted using water and phosphorus balances which consider
watershed inflows, direct rainfall on STA surfaces, evapo-
transpiration, atmospheric phosphorus loads, phosphorus
uptake, and outflows.
Estimated STA performance:
Based on overall phosphorus loads and flows estimated to
result from implementation of the STAs and BMP program, the
combined flow-weighted mean concentration in discharges from S5A,
S6, S7, S150, and S8 will be reduced from 168 ppb to 50 ppb.
Accordingly, the STAs are located and sized to deliver a uniform
long term annual flow-weighted mean concentration of 50 ppb or less
at each inflow point to the EPA. Accomplishment of this objective
will provide an overall load reduction of approximately 80% from
the EAA into the EPA and a load reduction of at least 85% from the
EAA into the Refuge. The District shall take mitigation measures
such as declaring water shortage, implementing supply side
management, releasing water from Lake Okeechobee, reducing water
retention in the EAA or adding flow from east of the EPA to offset
flow reduction to the EPA.
Appendix C-4
STA Size Estimates:
Table 1 provides an estimate of the effective treatment areas
of STAs. The sizes and configurations of STAs are designed to
achieve an outflow concentration of approximately 50 ppb at each
STA outflow point. These STA acreages and the BMP Regulatory
Program provide the control programs which are anticipated to meet
both the interim and long term Refuge and Park phosphorus limits
and concentration levels. However, notwithstanding implementation
of these control programs, if the Park or Refuge phosphorus limits
or concentration levels are violated, then additional remedies will
be taken, such as expansion of STAs, more intensive management of
STAs, a more stringent EAA Regulatory Program, or a combination of
the above. The State Parties shall not implement more intensive
management of the STAs as the sole additional remedy.
Table 1. STA Effective Area
Basin |
STA |
Approximate Total
Acres to be Purchased |
Effective Treatment
Acres |
| S-5A |
STA-1 |
12,500 |
11,800 |
| S-6 |
STA-2 |
4,000 |
3,700 |
| S-7 |
STA-3 |
5,270 |
4,950 |
| S-8 |
STA-4 |
12,930 |
12,150 |
| TOTAL: |
|
34,700 |
32,600 |
Operational Considerations:
Operational flexibility may be required, in order to divert
flows from one basin to another (e.g. S8 & S6 to STA-3) in order to
make optimal use of the total effective treatment area of wetlands
within the STAs and distribute water of uniform phosphorus
concentrations across EPA inflow points. The sizes and
configurations of STAs 2, 3, and 4 may be adjusted, after a more
Appendix C-5
detailed engineering analysis of the system has been completed.
The total acreage of these three STAs will not be reduced. This
analysis will determine optimal methods for routing water within
and between the S-6, S-7 and S-8 basins to make most effective
use of the STAs and to ensure that all of the runoff is treated. STAs
2, 3, and 4 will be operational by July 1, 1997. With respect to
STA-1, 7,400 acres of effective treatment area will be operational
by July 1, 1997. The District will construct an additional 4,400
acres of effective treatment area by July 1, 2002 if the year 2002
Refuge long term concentration levels or Class III criteria,
whichever is lower, are not met by July 1, 2000.
The District will also design and implement control programs
for other watersheds outside of the EAA discharging into the EPA,
including L3, S140, L28I.
Sensitivity of Treatment Area (Acreage) to BMP Performance
The above treatment areas assume that the BMP regulatory
program will achieve a 25% reduction in phosphorus loads from each
basin. Table 2 lists the treatment areas which would be required
to achieve a 50 ppb concentration at EPA inflow points for other
assumed BMP performance levels:
Table 2. Effective Treatment Areas (1000 Acres) Required to
Achieve 50 ppb at EPA Inflow Points
BMP Performance
| Load Reduction |
0% |
15% |
25% |
| Volume Reduction |
0% |
12% |
20% |
| S-5A |
15.0 |
13.1 |
11.8 |
| S-6 |
4.9 |
4.2 |
3.7 |
| S-7 |
6.7 |
5.6 |
5.0 |
| S-8 |
15.4 |
13.5 |
12.2 |
| Total |
41.9 |
36.4 |
32.6 |
Appendix C-6
If the BMP program achieves a 15% reduction in phosphorus load
(instead of the assumed 25%), an additional 3,800 treatment acres
would be required to meet 50 ppb. If the BMP program does not
achieve the predicted load reduction, up to 9,300 additional acres
would be required.
Control Program to Achieve Compliance with Class III Criteria
The research program will provide additional data to support
the interpretation of Class III water quality criteria for the
Refuge, Park, and the WCA's. Modification of the control program
to achieve Class III criteria will reflect new information obtained
in the research program and observed performance of the BMP's and
STAs in the interim phase of the control program. Table 3 provides
hypothetical estimates of the additional treatment acreage (beyond
the 32,600 acres prescribed in the above plan) which may be
required to achieve discharge concentrations of 40, 30, and 20 ppb
total phosphorus for various levels of observed BMP and STA
performance.
Appendix C-7
Table 3. Additional Effective Treatment Areas (1000 Acres)
Beyond
the Above Control Program (32,600 Acres) Required to
Achieve Total Phosphorus Discharge Concentrations
Observed
BMP Performance
Load Reduction |
|
Observed STA Performance
Phosphorus Settling Rate (m/yr) |
| Low |
Expected |
High |
| Load Reduction |
|
6 m/yr |
8 m/yr |
10 m/yr |
| Total Phosphorus Discharge Concentration = 40 ppb
|
| None |
0% |
32.5 |
17.0 |
7.6 |
| Low |
15% |
24.7 |
10.8 |
2.6 |
| Expected |
25% |
19.2 |
6.5 |
-1.2 |
| High |
40% |
10.6 |
-0.3 |
-6.7 |
| Total Phosphorus Discharge Concentration = 30 ppb
|
| None |
0% |
45.4 |
27.1 |
15.7 |
| Low |
15% |
36.5 |
19.9 |
10.1 |
| Expected |
25% |
30.4 |
15.0 |
5.7 |
| High |
40% |
20.5 |
7.2 |
-0.7 |
| Total Phosphorus Discharge Concentration = 20 ppb
|
| None |
0% |
64.2 |
41.5 |
27.5 |
| Low |
15% |
54.1 |
33.2 |
20.9 |
| Expected |
25% |
46.9 |
27.4 |
15.7 |
| High |
40% |
35.4 |
18.3 |
8.1 |
For example, if the BMP's and STAs perform according to design
assumptions, (25% BMP reduction, Settling Rate = 8 m/yr), an
additional effective treatment area of 15,00 acres would be
required to achieve a total phosphorus discharge concentration of
30b ppb at EPA inflow points. If low performance is demonstrated
for both controls (15% BMP reduction, Settling Rate = 6 m/yr), an
additional treatment area of 36,500 acres would be required to
achieve 30 ppb. Similar dependencies exist for other total
phosphorus discharge concentrations.
Appendix
D-1
APPENDIX D
RESEARCH AND MONITORIING PROGRAM
The State Parties shall initiate a comprehensive, long-term,
multi-agency cooperative research and monitoring program. Planning
for this research and monitoring program will be completed within
six (6) months after settlement and implemented according to a
schedule established by the TOC. The State Parties shall primarily
be responsible for the research and monitoring program with support
from the United States. The National Park Service, the U.S. Fish
and Wildlife Service, the USEPA and the Corps will assist in the
research and monitoring. For example, funds available under
section 319 of the Clean Water Act can be granted to the State
Parties by USEPA in support of approved monitoring programs to
assess effectiveness of BMPs and STAs.
RESEARCH PLAN
The research objectives will be to assess the current and
continuing responses of the Everglades wetlands to nutrient inputs
from cultural eutrophication, and to determine maximum levels of
nutrients that will not cause imbalances in natural populations of
aquatic flora and fauna (Florida Class III Water Quality
Standards). Research to determine the Class III criteria for the
Park, Refuge, and Water Conservation Areas shall begin no later
than July 1, 1992, and final reports shall be completed no later
than July 1, 1997.
This program shall include the following minimum components to
achieve the above objectives:
Appendix D-2
1) Initiate, develop, collect appropriate additional data
for and complete detailed modeling efforts to measure quality
and quantity impacts of system operation and alternatives for
the purpose of improving water quality in the Everglades
system. Detailed nutrient modeling for the Refuge, Water
Conservation Areas (WCA's), Park, C-111 Basin and Northeast
Shark River Slough shall incorporate the best available
scientific information on nutrient dynamics (including peat
accretion rates; soil uptake kinetics; macrophyte and
periphyton uptake kinetics; and total phosphorus transport
mechanisms, including storage and transport in shallow
seepage) to determine the fate of introduced nutrients and
trends. Similar budget models must be prepared for Stormwater
Treatment Areas (STAs), with emphasis given to the
interrelationships between water management and water quality
in determining the effectiveness of these systems. Each model
shall be designed to predict changes in outflow water quality
likely to result from changes in inflow water quality and
quantity in the WCAs and to predict and assess the long-term
success of nutrient management strategies in achieving water
quality criteria.
2) Develop a research program to determine the existing
conditions and if additional damage in the Refuge and Park
marshes has occurred due to interim delivery levels of total
phosphorus or if reversals of damage are evident.
3) Develop a program that will include experimental
Appendix D-3
approaches to interpret the Class III nutrient criterion
regarding imbalances of flora and fauna. Determine if
concentration standards provide sufficient protection against
imbalance or whether limitations on phosphorus loads into the
Park and Refuge are required. An array of indices will be
used to measure sensitivity of the ecosystem to small changes
in nutrients. These will include nutrient cycling processes
and the basic components of the Everglades ecosystem, such as
periphyton, and other sensitive indicators of nutrient
enrichment.
4) Contingent upon availability of leased or private lands,
develop and initiate research to measure performance and
improve field efficiency of BMPs. During implementation,
control areas (with conventional cropping systems) should be
used to determine BMP effectiveness in controlling total
phosphorus losses and water reductions. Water sampling design
must allow for close monitoring of performance of the
individual management practices and represent the range of all
field conditions. Performance results will be used to shape
further development of management options, and further
training of farmers, if needed.
MONITORING PLAN
The monitoring program shall include water quality and
biological monitoring at interior marsh stations and downstream of
all structures discharging into the Refuge, WCAs, and Park,
including the Holeyland, Northeast Shark River Slough, Taylor
Appendix D-4
Slough and C-111 Basin. The objective of the monitoring is to
measure effectiveness of the total phosphorus limits and
concentration levels and document evidence of further disturbances,
or recovery processes, in the Refuge, Water Conservation Areas, and
Park.
This monitoring program shall conform to the following minimum
requirements:
1) Water quality monitoring shall include timely data on
flows, stages, routine water quality parameters,
pesticides/herbicides, and heavy metals. This may necessitate
use of provisional or unofficial data for calculation of
flows, stage data, and flow weighted calculations. Actual
values may change after verification. All water control
structures for the Refuge, the Park, and the WCAs will be
monitored as is done by the present SFWMD CAMB, ENP, and LEC
programs. Monitoring will be extended to any new water control
structures added to the delivery system. The monitoring
program shall include water quality sampling every other week
at all Park and Refuge delivery points and at representative
internal marsh stations including monthly sampling at the 14
permanent Refuge stations. The District's current water
quality monitoring program shall continue with emphasis on
total phosphorus, orthophosphate, ammonia, nitrate/nitrite,
total nitrogen, chlorophyll-a, alkaline phosphatase, physical
parameters, ions, heavy metal (especially mercury), and
pesticides/herbicides. A plan for limiting
Appendix D-5
pesticide/herbicide and heavy metals analysis to a range of
representative compounds and sampling locations can be
considered.
2) In order to adequately assess Refuge and WCA nutrient
inputs and outputs and Park nutrient inputs, the monitoring
program shall include water quality monitoring of discharges
at all relevant structures, monitoring of the nutrient content
of atmospheric deposition in the Everglades system and
monitoring of agricultural discharge quality. Atmospheric
deposition will be monitored at selected sites in the EAA,
WCAs, the Refuge, and the Park. The same field sampling and
laboratory protocol will be employed at all sites.
3) Monitoring shall be implemented to identify variation
(temporal and spatial) in biological and water quality
parameters along transects in the WCAs, Park, and Refuge
originating at major surface water inflow points and
continuing along flow gradients. This must include
representative transects in Shark River Slough, Taylor Slough,
and in background areas of the Park and Refuge. Parameters
monitored will include, at a minimum: routine water quality
parameters in surface water samples; soil nutrient content,
redox potential, and phosphatase activity; including major
indicators of periphyton community composition.
4) All monitoring programs must have ad DER approved QA/QC
plan in place with 9 months of the date of this Agreement.
Appendix D-6
Any proposed changes in field sampling protocol or laboratory
procedure must be justified and brought to the attention of
the TOC for approval before implementation. The sampling
designs, frequency, analytical methodology, and QA/QC
protocols employed in the monitoring program shall be subject
to mutual acceptance by all parties. The overall objective
will be to maximize the accuracy and precision of the
monitoring data, while insuring that any new sampling
techniques or analytical procedures a will not introduce biases
relative to the historical monitoring data upon which the
limits are based. The plan should include measurements of
concentrations due to contamination during field sampling and
processing as well as laboratory analysis, and comparison of
these levels to interim and long-term standards.
REVIEW AND OVERSIGHT
The TOC will designate a panel for review, oversight and
interpretation of the research and monitoring program. The purpose
of this panel is to:
1) Review QA/QC documentation and requirements for
consistency and approve modifications necessary to insure
accuracy and quality of data collection, analysis, and
interpretation,
2) Review and define suitability of measurement parameters
and experimental designs,
3) Establish priorities within each component of research
and monitoring program, and
Appendix D-7
4) Review any proposed monitoring and research for
consistency with objectives as defined in these Appendices or
recommend modifications to objectives, experimental design,
and monitoring based on analysis of results.
Appendix
E-1
APPENDIX E
EVERGLADES AGRICULTURAL AREA
REGULATORY PROGRAM
I. Background
A. The goal of the regulatory strategy is to reduce present
total phosphorus loads from the EAA to each Stormwater Treatment
Area (STA) by at least by 25% by February 1996. An interim target
reduction of 10% in total phosphorus loads from the EAA will be
required by February 1994.
B. The District will have all sources in the EAA under
either individual or master permits by July 1993. All sources must
comply with all permit conditions by February 1996. If permits are
not issued by July 1, 1993 or compliance is not achieved a by
February 1996, the District will institute appropriate compliance
and enforcement action.
C. Achieving a 25% reduction through the application of BMP's
will require a regulatory program that includes at least the
following elements:
1. Development and implementation of BMPs
2. Permitting
3. Monitoring
4. Enforcement
The basic concepts of the regulatory program are to maintain
water levels elevated in the organic soils to reduce oxidation and
release of phosphorus, and to apply only sufficient phosphorus to
maintain crop productivity and thereby eliminate excess phosphorus
Appendix E-2
as much as possible.
D. Owners of contiguous land may submit a single application
for Master Permit; however phosphorus load allocations will be
based on the basin and corresponding STA to which the land is
tributary.
II. Implementation
A. The effective date of the rule should be no later than
May 31, 1992, (based on rule adoption in April 1992) if the rule
making process remains on schedule. Any challenges received will
delay the effective date only by the amount of time necessary to
complete the challenge process.
B. Permit applications must be submitted and completed in
time for final agency action on them to take place by July 1993.
III. Conditions For Issuance for Individual or Master Permits.
A. An applicant entity must demonstrate enforcement
authority and the ability to carry out all acts necessary to
implement the terms and conditions of the permit.
B. The applicant will be required to not exceed the
phosphorus load allocation as specified in section VI B. to be
applied as a moving annual average. This requirement is in
addition to successful implementation of the applicant's approved
BMP program. Notwithstanding the BMP program, the applicant is
still responsible for achieving the required phosphorus load
allocation.
C. An applicant will be required to institute a BMP Program
that will meet the required interim and long term phosphorus load
Appendix E-3
allocations. Compliance with these load allocations should result
in the interim and long term (1996) target reductions o f 10% and 25%
respectively in total phosphorus load from the EAA being achieved.
The BMP Program must include the following elements:
1. An acceptable fertility and water management plan for
each crop, combination of crops or farming units.
2. An acceptable design for water management including field
water management strategies, description of infrastructure,
inter-and intra-operation water routing, probable volume and
timing of discharge, and expected nutrient recovery. The application
must include procedures for monitoring system
performance.
3. An acceptable monitoring plan to verify BMP
performance and implementation.
4. An acceptable schedule to begin implementing the BMP
program and measuring compliance within one year of permit
issuance. Fertility management planning and other operational
management BMPs shall be in place by the fall of 1993.
Structural changes shall be presented to the SFWMD in 1994 and
installed by 1995. In order to achieve the load allocations
all BMPs shall be operational by 1996.
5. An acceptable education and training program for
management and operational staff to implement and monitor the
approved BMP program.
6. The applicant can submit alternative BMP designs if they
can be shown to be equally effective.
Appendix E-4
D. The applicant will be required to submit an acceptable
water quality monitoring plan that documents:
1. Compliance with annual load allocation;
2. BMP implementation and operation;
3. BMP effectiveness (BMP research can be used to supplement
data where appropriate);
4. Identification of high episodic phosphorus events.
The plan must monitor flow and total phosphorus concentration
discharged from the permitted area on a continuous basis, as
required by the District. Sampling must be conducted by qualified
individuals, and samples must be analyzed by a certified laboratory
with a DER approved QA/QC plan.
IV. Content of Application for Individual or Master Permits.
A. An application for a Master Permit must include
information that demonstrates the applicant entity possesses the
authority and the ability to carry out all acts necessary to
implement the terms and conditions of the permit, including
enforcement authority. At a minimum, the application must include:
1. Clear delineation of the are contained in the permit;
2. Interlocal agreements with municipalities and other
entities of local government, as necessary;
3. Written contracts with landowners, as necessary.
B. Each application must include a BMP program with the
following elements:
1. A fertility and water management plan for each crop,
combination of crops or farming units.
Appendix E-5
2. A design for water management, including field water
management strategies, description of infrastruture, inter-
and intra-operation water routing, probable volume and timing
of discharge, and expected nutrient recovery.
3. A monitoring plan to verify BMP performance and
implementation.
4. An education and training program for management and
operational staff to implement and monitor the approved BMP
program.
5 A schedule for implementing the BMP program and
monitoring plan within one year of permit issuance. The
schedule must require fertility management planning and
the operational management BMPs to be in place by the
fall of 1993; structural changes to be presented to the
SFWMD in 1994 and installed by 1995; and all BMPs to be
operational by 1996.
6. Alternative BMP designs, if they can be shown to be
equally effective.
C. A monitoring plan to provide for monitoring flow and
total phosphorus concentration discharged from the permitted area
on a continuous basis, as required by the District. The plan must
provide for sampling to be conducted by qualified individuals, and
for samples to be analyzed by a certified laboratory with a DER
approved QA/QC plan.
V. Limiting Conditions
A. The permittee must successfully implement all elements
Appendix E-6
and requirements of the approved BMP program.
B. The applicant must achieve the required phosphorus load
allocation. Total phosphorus allocations (lbs/acre/yr) for permits
within the S-5A, S-6, S-7, and S-8 basins will be calculated
individually for each basin. Basin historical areal export rate
for each basin will be calculated by dividing the basin (i.e. pump
station) average annual total phosphorus load for Water Years 1979-
88 (less the load associated with water supply deliveries to the
Lower East Coast and less the load associated with the lands to be
used for STAs) by the contributory area for each pump station. The
contributing area will not include lands to be used for STAs and
public preservation lands which are not actively drained. The 1994
interim load allocation will be calculated by multiplying the
historical areal export rate by 0.90. The 1996 load allocation
will be calculated by multiplying the historical areal export rate
by 0.75.
C. The permittee must annually submit an implementation
status report on their approved plan for achieving water quality
objectives, and report result of water quality sampling and flow
measurements.
D. The permittee must implement the monitoring program
adequately to ensure that the following are documented:
1. Compliance with annual load operation;
2. BMP implementation and operation;
3. BMP effectiveness (BMP research can be used to supplement
data where appropriate);
Appendix E-7
4. Identification of high episodic phosphorus events.
Flow and total phosphorus concentration discharged from the
permitted area must be monitored on a continuous basis, as required
by the District. Quarterly and annual report of results must be
submitted to the District. Sampling must be conducted by qualified
individuals, and samples must be analyzed by a certified laboratory
with a DER approved QA/QC plan.
E. Each permittee will be required to submit an annual
report to the District summarizing BMP implementation and
associated monitoring to evaluate BMP effectiveness. Each
permittee will be required to submit a summary of required
activities including BMP installation, BMP operation activities
(pertinent to water management and nutrient management), water
quality assurance audits, and intra-operation water quality checks.
This summary will be produced for the appropriate operational
scale.
F. Each permittee will be required to maintain appropriate
records as part of the permit.
VI. Compliance and Enforcement
A. The intent is to identify critical problems before non-
acceptable loads occur.
B. Compliance with total phosphorus load allocation will be
determined by measuring flow and concentration at the applicant's
property boundary, with adjustment for hydrologic variability with
respect to the 10-year base period such as an adjustment for
rainfall made considering that year's rainfall versus average.
Appendix E-8
annual rainfall over the 10-year base period.
C. The District will audit BMP implementation by permittees.
The District will establish reporting and monitoring protocols and
will describe the audit procedure. Each permittee is required to
maintain appropriate records as part of the permit.
D. The District will monitor:
1. Quantity and quality of water discharged by each
permittee sufficient to verify with reasonable certainty that
the permittee monitoring program is adequate.
2. BMP performance at selected sites.
E. If a permittee exceeds its permitted areal phosphorus load
allocation for February 1994 of 1996, the permittee shall:
1. Present a plan for monitoring all pumping and
discharge facilities within the permitted area for flow
and concentration on a continuous basis;
2. Submit a proposed compliance plan and schedule (including
additional BMP designs) which will bring the permittee into
compliance within 6 months.
3. The District shall review the plan and schedule, and:
a. If acceptable, will amend the permit
accordingly;
b. If unacceptable will impose penalties or
take whatever enforcement actions are
appropriate, including but limited to
those set forth in Sections 373.044, 373.083.
373.119, 373.129, 373.136, 373.603, F.S., and
Appendix E-9
Chapter 40E-1, F.A.C.
Section 373.044, F.S., authorizes the governing board to make
and adopt reasonable rules, regulations, and orders which may be
enforced by mandatory injunction or other appropriate action in the
courts of the state.
Seletion 373.083, F.S., authorizes the governing board to issue
orders to implement or enforce any of the provisions of or
regulations adopted pursuant to Chapter 373, F.S.
Section 373.119, F.S., authorizes the executive director of
the District to serve administrative complaint and orders
prescribing corrective action whenever there is reason to believe
that a violation of the provisions of or regulations adopted
pursuant to Chapter 373. F.S., has occurred, or is about to occur.
The order becomes final unless the person served requests a hearing
within 14 days. The executive director, with concurrence of the
governing board, may issue emergency orders requiring immediate
compliance if they find that immediate action is needed to protect
the public health, safety, or welfare.
Section 373.129, F.S., authorizes the department, the
governing board, and any local board to commence actions in courts
for the following purposes:
(1) To enforce rules, regulations, and orders;
(2) To enforce violations of the provisions of or regulations
adopted pursuant to Chapter 373. Florida Statues;
(3) To protect and preserve the water resources of the state;
(4) To defend actions pertaining to the water resources of
Appendix E-10
the state;
(5) To recover civil penalties up to $10,000 per offense;
Each date during which a violation occurs is a separate
offense;
(6) To recover investigative costs, court costs, and
reasonable attorney's fees.
Section 373.136, F.S., authorizes the governing board to
enforce its regulations and orders by suit for injunction or other
action in the courts of the state.
Section 373.603, F.S., authorizes the department or the
governing board to enforce the provisions of and regulations
adopted pursuant to Chapter 373. F.S., to the same extent as any
peace officer is authorized to enforce the law.
Chapter 40E-1, F.A.C., contains general and procedural
provisions adopted as rules by the governing board.
Part V of F.A.C. Chapter 40E-1 addresses decisions determining
substantial interests (formal and informal administrative
hearings). Part VI addresses permits. Section 40E1.611, F.A.C.,
covers emergency action. Section 40E-1.612 covers
administrative enforcement action.
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