U.S. ENVIRONMENTAL PROTECTION AGENCY
               NATIONAL EUTROPHICATION  SURVEY
                        WORKING PAPER SERIES
                                              REPORT
                                                ON
                                            LAKE GRIFIN
                                             LAKE COW
                                             FLORIDA
                                           EPA REGION IV
                                        WORKING PAPER No, 254
     CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
                                 and
    ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440

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                                     REPORT
                                       ON
                                   LAKE GRIFIN
                                    LAKE COUNTY
                                    FLORIDA
                                  EPA REGION  IV
                              WORKING PAPER No, 254
          WITH THE COOPERATION  OF THE
FLORIDA DEPARTMENT OF ENVIRONMENTAL REGULATION
                   AND THE
            FLORIDA NATIONAL GUARD
                OCTOBER, 1977

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                                   CONTENTS
                                                         Page
  Foreword                                                i i
  List of Florida Study Lakes                             iv
  Lake and Drainage Area Map                              v

  Sections
  I.   Conclusions                                         1
 II.   Lake and Drainage Basin Characteristics             4
III.   Lake Water Quality Surmary                          5
 IV.   Nutrient Loadings                                   9
  V.   Literature Reviewed                                14
 VI.   Appendices                            .             15

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                                11
                         FOREWORD
    The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs..

OBJECTIVES

    The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.

ANALYTIC APPROACH

    The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:

        a.  A generalized representation or model relating
    sources, concentrations, and impacts can be constructed.

        b.  By applying measurements of relevant parameters
    associated with lake degradation, the generalized model
    can be transformed into an operational representation of
    a lake, its drainage basin, and related nutrients.

        c.  With such a transformation, an assessment of the
    potential for eutrophication control can be made.

LAKE ANALYSIS

    In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented.  The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)]5 water
quality criteria/standards review [§303(c)], clean lakes [§314(a»b)j,
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal  Water Pollution Control Act Amendments of 1972.

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                                    Ill
    Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes.  Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.

ACKNOWLEDGMENT

    The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Florida Department of Environ-
mental Regulation for professional involvement and to the Florida
National Guard for conducting the tributary sampling phase of the
Survey.

    Joseph W. Landers, Jr., Secretary of the Department of Environ-
mental Regulation; John A Redmond, former Director of the Division
of Planning, Technical Assistance, and Grants; and Dr. Tim S.  Stuart,
Chief of the Bureau of Water Quality, provided invaluable lake docu-
mentation and counsel during the survey, reviewed the preliminary
reports, and provided critiques most useful in the preparation of this
Working Paper series.

    Major General Henry W. McMillan (Retired), then the Adjutant
General of Florida, and Project Officer Colonel  Hugo F.  Windham,
who directed the volunteer efforts of the Florida National Guard,
are also gratefully acknowledged for their assistance to the Survey.

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                                    IV
LAKE NAME

Alligator
Apopka
Banana
Crescent
Doctors
Dora
Last Tohopekaliga
Effie
Eloise
George
Gibson
Gl en ad a
Griffin
Raines
Hancock
Horseshoe
Howe!1
1'stokpoga
Jessie
Jessup
Kissinraee
Lav;ne
Lulu
Marion
Minnehaha
Minneola
Monroe
Munson
Okeechobee

Poinsett
Reedy
Serninole

Semi nole
South
Talquin
Tarpon
Thonotosassa
Tohopekaliga
Trout
Weohyakapka
Yale
NATIONAL EUTROPKICATION SURVEY

         STUDY LAKES

       STATE OF FLORIDA

                            COUNTY
                            Columbia
                            Lake,  Orange
                            Polk
                            Flagler,  Putnam
                            Clay
                            Lake
                            Osceola
                            Polk
                            Polk
                            Putnam, Vo'iusia
                            Polk
                            Highlands
                            Lake
                            Pol k
                            Folk
                            Semi no!e
                            Orange, Sentinel e
                            Highlands
                            Polk
                            Seminole
                            Osceola
                            Orange
                            Polk
                            Polk
                            Orange
                            Lake"
                            Seminole, Volusia
                            Leon
                            Glades, llendry, Martin,
                             Okeechobee, Palm  Beach
                            Brevard,  Orange, Osceola
                            Polk
                            Jackson,  FL; Decatur,
                             Seminole,  GA
                            Pinellas
                            Brevard
                            Gadsden,  Leon
                            Pinellas
                            Hillsborough
                            Osceola
                            Lake
                            Pol k
                            Lake

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   Iributary  Sampling Site
X  Lake  'itunp I in
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                               LAKE GRIFFIN
                             STORE! NO. 1214
I.  CONCLUSIONS
    A.  Trophic Condition:
            Survey data and reports by others (Ketelle and Uttormark,  1971;
        Shannon and Brezonik, 1972) indicate that Lake Griffin is highly
        eutrophic.  It ranked 24th in overall trophic quality when the 41
        Florida lakes sampled in 1973 were compared using a combination of
        six parameters*.  Twenty-one of the lakes had less median total
        and dissolved phosphorus, 21 had less and three had the same median
        inorganic nitrogen, 28 had less mean chlorophyll  a_, and 31  had
        greater mean Secchi disc transparency.
            The numbers of blue-green algae in all  phytoplankton samples
        confirm the trophic assessment (see page 7).
    B.  Rate-Limiting Nutrient:
            Due to loss of nitrogen in the sample between the time of  col-
        lection and the beginning of the algal  assay, the results are  not
        representative of conditions in the lake at the time the sample
        was taken (03/14/73).
            The lake data indicate phosphorus limitation  in March but
        nitrogen limitation in September and November.
    C.  Nutrient Controllability:
            1.  Point sources — It is calculated that point sources con-
        tributed 48.0% of the total phosphorus  and  8.2% of the total
        nitrogen inputs to Lake  Griffin during  the  sampling year.  Agri-
* See Appendix A.

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                             2
cultural sources (muck farm and livestock) collectively contributed
40.1% of the total phosphorus load, the Leesburg wastewater treat-
ment plant contributed 7.8%, and lakeshore septic tanks were esti-
mated to have contributed less than 1%.
    Since the Survey sampling year, nearly 34% of the muck farm
pumping capacity (261.2 m3/min) and the Cattlemaster Farms discharge
have been diverted to retention ponds (Wicks, 1977).  It is calculated
that these improvements have reduced the Lake Griffin total phosphorus
loading by 7,190 kg/yr and the areal loading from the sampling year
1.41 g/m2 to 1.21 g/m2/yr.  When the remaining muck farm pumpage is
retained, the total phosphorus load will be reduced by an additional
13,000 kg/yr, and the areal loading will be reduced to 0.85 g/m2/yr.
Removal of 85% of the effluent phosphorus load at the Leesburg waste-
water treatment plant would further reduce the areal loading to 0.75
g/m2/yr.
    While a 0.75 g/m2/yr total phosphorus loading would still  exceed
the 0.56 g/m2/yr proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading, the reductions noted above should
result in an improvement in the trophic condition of Lake Griffin
since the critical phosphorus level for the lake may be somewhat
higher than that suggested by Vollenweider (see page 13), and the
Haines Creek contribution probably has been reduced to some degree
from that measured during the sampling year (see discussion below).
    2.  Non-point sources--It is estimated that 52.0% of the total
phosphorus and 91.8% of the total nitrogen inputs to Lake Griffin

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                                     3
        were contributed by non-point sources.
            Haines Creek contributed 39.8% of the total  phosphorus load
        and 76.2% of the total nitrogen load, although the nutrient
        export rates of this stream were relatively low (12 kg P and 413
        kg N per square kilometer of drainage area during the sampling year;
        see page 12).  However, it is likely that the nutrient exports of
        the creek are somewhat less now because of controls instituted
        upstream in the Oklawaha Chain of Lakes drainage (e.g., muck farm
        pumpage at Lake Apopka*) since the Survey sampling was completed.
* Working Paper No.  244.

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II.   LAKE AND DRAINAGE BASIN CHARACTERISTICS1"

     A.   Morphometry  :

         1.   Surface area:   35.60 kilometers2.

         2.   Mean depth:   2.9 meters.

         3.   Maximum depth:   4.6 meters.

         4.   Volume:  103.240 X 106  m3.

         5.   Mean hydraulic  retention  time:  124  days.

     B.   Tributary and Outlet:
         (See Appendix C for flow data)

         1.   Tributaries  -

                                               Drainage       Mean flow
             Name                              area  (km2)*    (m3/sec)*

             Dead River                             11.3         0.06
             Haines Creek                        1,678.3         8.36
             Minor tributaries  &
              immediate drainage -                282.0         1.21

                            Totals               1,971.6         9.63

         2.   Outlet -

             Oklawaha River                       2,007.2**       9.62

     C.   Precipitation***:

         1.   Year of sampling:   121.6  centimeters.

         2.   Mean annual:   132.1 centimeters.
 t Table of metric conversions—Appendix A.
 tt Morphometry from contour map of Lake Griffin  prepared  by the Florida Game
    and Fresh Water Fish Commission.
 * For limits of accuracy,  see Working  Paper  No.  175,  "...Survey Methods,
   1973-1976".
 ** Includes area of lake.
 *** See Working Paper No.  175.

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                                       5
III.   WATER QUALITY SUMMARY
      Lake Griffin was sampled three times  during  1973  by  means  of  a
  pontoon-equipped Huey helicopter.   Each time,  samples  for  physical and
  chemical parameters were collected from three  stations on  the  lake and
  from one or more depths  at each station (see map,  page v).   During each
  visit, a single depth-integrated (near  bottom  to surface)  sample  was
  composited from the stations for phytoplankton identification  and enumer-
  ation; and during the first visit,  a  single 18.9-liter depth-integrated
  sample was composited for algal  assays.  Also  each time, a depth-inte-
           /
  grated sample was collected from each of  the stations  for  chlorophyll a_
  analysis.  The maximum depth sampled  at each station was 1.2 meters.
      The sampling results are presented  in full  in  Appendix D and  are
  summarized in the following table.

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                              A. SUMMnKY UK HtiYSICAL  AND CHEMICAL CHARACTERISTICS  FOR  LAKE GRIFFIN
                                                           SfGRET CODE 1214
PARAMETER

Tf^P (C)

DISS CKY  (Mi,/L)

CNDCTVY  (HOMOMO)

PH (STA'JL) UNITS)

TuT ALK  (M

TOT P  (MG/L)

UrtfHO P  (MG/
AMMONIA  (MG/L)

rfJEL N  (MG/L)

INO^G N  C-1G/L)

TOTAL N  (MG/L)

CHL*PYL  A   c6.? 25. b
9.1 - ,.3 *.> 9.1
2eb. - ^u. i,d. ^u.
v . 2 - ••» . - v . j 9.3
(-*9. - Io2. luu . loo.
0.09b - C.l')- u.u9-» u.u9?
0.012 - \> . 0 ! j J . 0 1 2 0 . 0 1 £
0 . 1 6 U - o . \ 7 1; j . 1 6 3 0 • 1 b 0
0 . 1 1- 1- ~ 0 . 1 ci j vi . 1 '/ u 0 . i I o
2.?00 - 3.31.J i.fcof i.v-u
u.32u - u.3*i--j 'o.3J5 j.J4u
-.36o - J.u/u- ^.b3, 2.000
12.^ - 5=.J 2i.i 2B.O
U . <* - 0 . r- U . 3 u . b
2iNL) SAMPLING ( 9/
3
KAi\lG£
2^.H - 29.7
a.* - *.i
29^. - 298.
3.9 - 9.0
80. - 98.
U.063 - U.122
O.Oib - 0.030
U. 100 - U.110
0.090 - 0.090
J.bt/0 - 4.000
0. 190 - U.20 J
3. no - 4.110
7n.o - 117.8
C .4 - O.o
SITES
MEAN ,
29. b
6.7
294.
9.0
91.
o.ioo
o.o2y
0.107
u.o90
3.oOO
0.1W
3.907
9... 2
0.5
t>/73)

MEDIAN
29.4
M.b
292.
9.0
88.
0.09o
0.02 /
0.110
0.090
3. BOO
0.200
3.900
10b.9
0.4
3kL)

RANGE
22.1 -
8.8
260. -
8.7 -
98. -
0.116 - 0
0.04/ - 0
0.130 - 0
0.110 - 0
3.000 - 3
0.240 - 0
3.130 - 3
58.2 -
0.3 -
SAMPLING (ll/
3

23.0
9.0
267.
9.0
103.
.157
.060
.170
. 140
.600
.310
.770
94.8
0.5
SITES
MEAN
22.6
9.0
2t>3.
8.8
101.
0.134
0.053
0.143
0.123
3.267
0.267
3.410
78.5
0.4
5/73)

MEDIAN
22.7
8.9
263.
8.9
101.
0.126
0.053
0. 140
0.120
3.250
0.260
3.380
82. b
0.4

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B.   Biological  characteristics:

    1.   Phytoplankton -
        Sampli ng
        Date

        03/14/73
        09/06/73
        11/05/73
    2.   Chlorophyll  a_ -

        Sampli ng
        Date

        03/14/73
        09/06/73
        11/05/73
Dominant
Genera

1.  Lyngbya s£.
2.  Microcystis sp.
3.  Dactylococcopsis sp.
4.  Synedra sp.
5.  Oscillatoria sp.
    Other genera

            Total
1.
2.
3.
4.
5.
Lyngbya sp.
Oscillatoria sp.
Achnanthes sp.
Blue-green filaments
Aphanocapsa sp.
Other genera

        Total
1.  Lyngbya s£.
2.  Dactylococcopsis sp.
3.  Aphanothece sp.
4.  Microcystis sp.
5.  Blue-green filaments
    Other genera

            Total
Station
Number

   1
   2
   3

   1
   2
   3

   1
   2
   3
                       Algal Units
                       per ml	

                       65,151
                       37,360
                        8,755
                        2,850
                        2,647
                        7,432
124,195

140,350
108,500
 13,300
  8,400
  4,550
 25,550

300,650

174,650
 20,961
 20,300
 20,300
 18,900
 88,430

343,541
                       Chlorophyll a.
                       (yg/D

                           12.4
                           28.0
                           28.0

                           74.0
                          105.9
                          117.8

                           58.2
                           82.6
                           94.8

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                                 8
C.   Limiting Nutrient Study:
        There was a loss of about 53% of the inorganic nitrogen in
    the algal assay sample during shipment to the laboratory.   There-
    fore, the assay results are not representative of conditions in
    the lake at the time of sample collection (03/14/73).
        The lake data indicate phosphorus limitation at all  stations
    in March but nitrogen limitation at all  stations in September
    and November.  Following is a tabulation of the mean inorganic
    nitrogen/orthophosphorus ratios for each of the stations and
    sampling times with the indicated limiting nutrient in parentheses.
    Station         03/14/73          09/06/73           11/05/73
        1           26/1 (P)           7/1 (N)            6/1  (N)
        2           27/1 (P)           7/1 (N)            5/1  (N)
        3           28/1 (P)           7/1 (N)            5/1  (N)

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IV.   NUTRIENT LOADINGS
     (See Appendix E for data)
     For the determination of nutrient loadings,  the  Florida  National
 Guard collected monthly near-surface grab samples  from each  of  the
 tributary sites indicated on the map (page v).   Sampling was begun  in
 March, 1973, and was completed in February,  1974.
     Through an interagency agreement,  stream flow  estimates  for the
 year of sampling and a "normalized"  or average year  were provided by
 the Florida District Office of the U.S.  Geological Survey  for the
 tributary sites nearest the lake.
     In this report, nutrient loads for sampled tributaries were deter-
 mined by using a modification of a U.S.  Geological Survey  computer
 program for calculating stream loadings*.   Nutrient  loads  for unsampled
 "minor tributaries and immediate drainage" ("ZZ" of  U.S.G.S.) were
 estimated using the means of the nutrient loads, in  kg/km2/yr,  at sta-
 tions A-l and B-l  and multiplying the means  by the ZZ  area in km2.
     Since the soils, farming methods,  and precipitation are  very similar
 in  the two areas (Wicks,  1977),  nutrient loads for the Lake  Griffin muck
 farms were based on estimates  of loads in the Lake Apopka**  drainage
 (.125.7 kg P/day and 340.1  kg N/day;  Anonymous, 1971) and the difference
 in  pump capacities in the two  areas;  i.e., the combined capacity of the
 pumps at Lake Griffin was 44% of the combined capacity of  the pumps dis-
 charging to Lake Apopka during the sampling  year.  The nutrient loads
 attributed to the Cattlemaster Farms were calculated using nutrient and
 pumpage data provided by the Lake County Department  of Pollution Control
 (Hennessey,  1977).
 *  See  Working  Paper  No.  175.
 ** Working  Paper  No.  244.

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                                     10
    The operator of the Leesburg wastewater treatment plant provided

monthly effluent samples and corresponding flow data.

    A.  Waste Sources:

        1.  Known municipal* -
        Name
Pop.
Served
                                              Mean Flow
Treatment
        Leesburg        11,000    stab, pond    7,444.6

        2.  Known industrial - None

        3.  Known agricultural** -


        Name

        Cattlemaster
         Farms
        Eustis Muck
         Farms
        Knight & Sons
         Farms
        Lake Land
         Farms &      } muck farm     1           83.3
         Baker Farms
Receiving
Water

Lake Griffin
Type
Waste No.
livestock
pasturing
muck farm
muck farm
Pumps
2
2
7
Capacity
(m3/min)
49.8
94.6
598.0
Receiving
Water (no. pumps)
Lake Griffin (1),,
Haynes Creek (1 )
Yale-Griffin Canal
Lake Griffin (4),,
                                      Haynes Creek (1)
                                      Yale-Griffin
                                      Canal  (2)

                                     Yale-Griffin Canal
* Treatment plant questionnaire.
** Hennessey, 1977; Wicks, 1977.
t Discharge downstream from Survey sampling station B-l.

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                                     11
    B.  Annual Total Phosphorus Loading - Average Year:
        1.  Inputs -
                                              kg P/          % of
            Source                            yr	          total
            a.  Tributaries [non-point load) -
                Dead River                        215          0.4
                Haines Creek                   20,030         39.8
            b.  Minor tributaries & immediate
                 drainage (non-point load) -    4,370          8.7
            c.  Known municipal STP's -
                Leesburg                        3,900          7.8
            d.  Septic tanks* -                    35         <0.1
            e.  Known industrial - None
            f.  Known agricultural** -
                Muck farms                     20,185         40.1
                Cattlemaster Farm                  10         <0.1
            g.  Direct precipitation*** -       1,570          3.1
                           Total               50,315        100.0
        2.  Outputs -
            Lake outlet - Oklawaha River       29,225
        3.  Net annual P accumulation - 21,090 kg.
* Estimate based on 130 lakeshore dwellings; see Working Paper No. 175.
** See page 9.
*** Brezonik and Shannon, 1971.

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                                     12
    C.  Annual Total Nitrogen Loading - Average Year:
        1.  Inputs -
                                              kg N/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -
                Dead River                      4,640          0.5
                Haines Creek                  692,620         76.2
            b.  Minor tributaries & immediate
                 drainage (non-point load) -  116,185         12.8
            c.  Known municipal STP's -
                Leesburg                       18,210          2.0
            d.  Septic tanks* -                 1,385          0.2
            e.  Known industrial - None
            f.  Known agricultural** -
                Muck farms                     54,620          6.0
                Cattlemaster Farm                  70         <0.1
            g.  Direct precipitation*** -      20,650          2.3
                           Total              908,380        100.0
        2.  Outputs -
            Lake outlet - Oklawaha River      913,825
        3.  Net annual N loss - 5,445 kg.
    D.  Non-point Nutrient Export by Subdrainage Area:
        Tributary                             kg P/km2/yr    kg N/km2/yr
        Dead River                                19            411
        Haines Creek                              12            413
* Estimate based on 130 lakeshore dwellings; see Working Paper No.  175.
** See page 9.
*** Brezonik and Shannon, 1971.

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                                     13

    E.  Yearly Loads:

            In the following table, the existing phosphorus loadings

        are compared to those proposed by Vollenweider (Vollenweider

        and Dillon, 1974).  Note, however, that Florida lakes may be

        able to assimilate phosphorus at a somewhat higher level  than

        that suggested by Vollenweider (Shannon and Brezom'k, 1972).

            Essentially, Vollenweider's "dangerous" loading is one at

        which the receiving water would become eutrophic or remain

        eutrophic; his "permissible" loading is that which would  result

        in the receiving water remaining oligotrophic or becoming

        oligotrophic if morphometry permitted.  A mesotrophic loading

        would be considered one between "dangerous" and "permissible"

            Vollenweider's model may not be applicable to water bodies

        with shore hydraulic retention times.

                                     Total Phosphorus        Total Nitrogen
To ta 1 Ace umu 1 a ted To ta 1
grams/m2/yr 1.41 0.59 25.5
Accumulated
loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Griffin:
"Dangerous" (eutrophic loading) 0.56
"Permissible" (oligotrophic loading) 0.28

* There was an apparent loss of nitrogen during the sampling year.   This may
  have been due to nitrogen fixation in the lake, solubilization of previously
  sedimented nitrogen, recharge with nitrogen-rich ground water, or underesti-
  mation of the muck farm and/or minor tributary and immediate drainage loads.
  Whatever the cause,  a similar nitrogen loss has occurred at Shagawa Lake,
  Minnesota, which has been intensively studied by EPA's former National Eutro-
  phication and Lake Restoration Branch (Malueg et al.,  1975).

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                                     14

V.   LITERATURE REVIEWED

    Anonymous, 1971.  Oklawaha comprehensive river basin study, first
        annual report.  East Central FL Reg. Plann. Council, Orlando.

    Brezonik, Patrick L., and Earl E. Shannon; 1971.  Trophic state of
        lakes in north central Florida.  Publ. No. 13., FL Water Resources
        Res. Ctr., U. of FL, Gainesville.

    Hennessey, Wm. K., 1977.  Personal communication (muck farming at
        Lake Griffin; pumpage and nutrient data).  Lake Co. Dept. of
        Poll. Contr., Tavares.

    Ketelle, Martha J., and Paul D. Uttormark, 1971.  Problem lakes in
        the United States.  EPA Water Poll. Contr. Res. Ser., Proj. #16010
        EHR, Wash., DC.

    Malueg, Kenneth W., D. Phillips Larsen, Donald W. Schults, and
        Howard T. Mercier; 1975.  A six-year water, phosphorus, and
        nitrogen budget for Shagawa Lake, Minnesota.  Jour. Eny. Qual.,
        4 (2): 236-242.

    Shannon, Earl E., and Patrick L. Brezonik, 1972.  Relationships between
        lake trophic state and nitrogen and phosphorus loading rates.  Env.
        Sci. & Techn. 6_ (8): 719-725.

    Vollenweider, R. A., and P. J. Dillon, 1974.  The application of the
        phosphorus loading concept to eutrophication research.  Natl.
        Res. Council of Canada Publ. No. 13690, Canada Centre for Inland
        Waters, Burlington, Ontario.

    Wicks, Ted, 1977.  Personal communication (muck farming practices at
        Lake Griffin; current pumpage).  Lake Co. Dept. of Poll. Contr.,
        Tavares.

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                            15
VI.   APPENDICES
                                APPENDIX  A
                               LAKE  RANKINGS

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LAKE DATA TO BE USED IN HANK INGS
CODE
1201
1202
1203
1206
1207
1204
1209
1210
1211
1212
121"*
1215
1217
1219
1220
1221
122J
122<*
1227
1228
1229
1230
1231
1232
123**
123e
1238
1239
      LAKE NAME
      ALLIGATOR LAKE
      LAKE APOPKA
      LAKE BANANA
      LAKE CRESCENT
      DOCTORS LAKE
      LAKE DORA
      LAKE EFFIE
      LAKE GEORGE
      LAKE GIdSON
      GLENADA LAKE
      LAKE GRIFFIN
      LAKE HAINES
      LAKE HANCOCK
      LAKL HORSESHOE
      LAKE HOWELL
      LAKE ISTOKPOGA
      LAKE JESSUP
      LAKE KISSIHMtt
      LAKE LULU
      LAKE MARION
      LAKE MINNErlAHA
      LAKE MINNEOLA
      LAKE MONROE
      LAKE OKEECHOdEE
      LAKC POINSETT
      LAKE PFEOY
      LAKE SOUTH
      LAKE TALOUIN
MED UN
TOTAL P
0.b2C
o.ioe
0.660
0.065
0.08<»
0.102
1.483
0.129
0.167
0.134
0.119
0.063
0.772
0.034
1.26C
0.039
0.49?
0.034
l.«90
0.044
0.0 3M
0.018
0.13R
0.063
C.085
0.031
0.074
0.085
MEDIAN
1NOPG N
0.260
0.230
0.260
0.130
0.120
0.240
0.410
0.165
0.115
0.165
U.260
0.115
0.195
0.130
0.285
0.120
0.290
0.145
1.065
0.260
0.080
0.070
0.300
0.185
0.150
0.330
0. 130
0.290
500-
MEAN StC
47<*.000
484. 1 76
482.667
473.889
465.555
482.889
489.000
469.308
470.000
454.167
481.333
462.667
483.500
459.000
46<*.000
464.222
487.000
463.667
483.000
468.833
43b.OOO
40b.333
474.555
<»72.366
"469.000
468.500
464.000
462.167
MEAN
CiLO^A
87.733
4b.6H
208.600
10.211
27.100
59.978
261.433
35.000
19.675
27.667
66.855
26.567
97.900
12.067
54.117
6.59*
7fc.550
2^.142
276.566
29.967
8.733
3.333
14.225
U.524
6.500
3<4.837
23.167
4.483
15- MEDIAN
WIN DO DIbS On'THO
13.100
8.200
3.600
10.200
10.600
7.400
15.000
11.000
10.200
14.700
6.600
10.600
5.600
11.500
9.000
8.600
7.600
8.800
14.300
7.600
7.700
7.400
10.800
9.800
10.600
10.600
9.000
14.^00
0.386
0.019
0.293
0.033
0.028
0.022
0.950
0.063
0.069
0.072
0.038
0.014
0. 158
0.023
1.175
0.010
0.2B8
0.007
1.030
0.016
0.012
0.009
0. 12r:
0.010
0.0>1
0.008
0.028
0.031

-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE  LAKE NAME

1240  LAKE THONOTOSASSA

I24i  LAKE TOHOPEKALIOA

12i»2  TROUT LAKE

1243  LAKE WEOHYAKAPKA

1246  LAKE YALE

1247  LAKE MUNSON

12*8  LAKE SEMINOLE

1249  LAKE LAWNE

1250  LAKE TARPON

1252  LAKE ELOISE

1258  LAKt JESSIE

1261  EAST LAKE TOHOPEKALIGA

1264  PAYNE'S PHAIRIE LAKE (NO
MEDIAN
TOTAL P
0.695
0.246
1.110
0.047
0.027
1.475
0.234
P.56C
0.041
0.486
0.051
0.042
1.260
MEDIAN
INORG N
0.095
0.200
0.650
0.080
0.160
0.925
0.175
1.350
o.oro
0.170
0.030
0.070
0. 140
500-
MEAN SEC
466. 167
472.917
472.000
456.667
441.000
4S6.667
473.833
494.667
400.889
465.333
452.667
440.833
47t>.000
MEAN
CHLOHA
37.700
30.633
76.967
7.767
25.367
140.317
102.000
84.900
6.867
70.233
26.300
5.167
88.200
15-
MIN DO
10.200
10.500
12.900
8.200
7.600
12.200
8.600
10.400
9.000
12.200
10.800
9.400
7.400
MEDIAN
DISS OtUrlO P
0.565
0.152
0.970
0.011
0.014
0.852
0.026
0.117
O.U27
0.339
0.011
0.007
1.210

-------
PERCENT OF LAKES *ITH HIGHER VALUES (NUMBER OF LAivtS WITH HIGHER VALUES)
LAKE
CODE  LAKE NAME
1201  ALLIGATOR LAKE
1202  LAKE APOPKA
1203  LAKE BANANA
1206  LAKE CRESCENT
1207  DOCTORS LAKE
1203  LAKE DORA
1209  LAKE EFFIE
1213  LAKE GEORGE
1211  LAKE GIBSON
1212  GLENADA LAKE
1214  LAKE GRIFFIN
1215  LAKE HAINES
1217  LAKE HANCOCK
1219  LAKL HORSESHOE
1220  LAKE HOWELL
1221  LAKE I5TOKPOGA
1223  LAKE JF.SSUP
1224  LAKfc. KISSIMMEE
1227  LAKE LULU
1228  LAKE MARION
1229  LAKL MINNEHAHA
1230  LAKE MINNEOLA
1231  LAKE MONKOE
1232  LAKE OKEECHOdEE
123-*  L^KE POINSETT
1236  LAKE KEEDr
1236  LAKE SOUTH
1239  LAKE TALOUIN
MEDIAN
TOTAL P
25
50
23
65
60
53
5
45
40
43
4P
70
18
93
11
85
28
90
3
78
88
100
38
68
58
95
63
55
( 10)
( 23)
( 9)
( 26)
( 24)
( 21)
< 2)
( 18)
( 16)
< 17)
( 19)
( 28)
( 7)
( 37)
! 4)
( 34)
( 11)
( 36)
( 1)
( 31)
( 35)
( 40)
( 15)
( 27)
( 23)
( 35)
( 25)
( 22)
MEDIAN
INORG N
29 (
3P (
29 (
70 (
76 1
35 (
10 (
54 1
81 1
54 1
29 I
81 (
43 <
(Q (
23 i
76
IP
63
3
29
91
^P
15
45
60
13
70
20
10)
15)
10)
; 27)
: 3d
: 14)
: 4)
: 21)
[ 32)
I 21)
1 10)
! 32)
1 17)
I 27)
( 9)
( 30)
( 7)
( 25)
< 1)
( 10)
( 36)
( 38)
( 6)
( IK)
( 24)
( 5)
< 27)
( 8)
500-
MEAN SEC
30 (
10 (
20 (
33 (
60 <
18 I
3 (
48 1
45 1
85 1
23 1
75 I
13 I
dO l
69 1
65 i
5
73
15
53 >
95 '
v8
2«
40
50
55
69
/8
12)
4)
8)
13)
24)
: 7»
1)
: 19)
: id)
; 34)
[ 9)
; 30)
I 5)
: 32)
[ 27)
1 26)
( 2)
t 29,
( 6,
( 21)
( 38)
( 39)
( 11)
( 16)
( 20)
( 22)
( 27)
( 31)
MEAN
C-ILORA
18 (
38 (
5 (
80 (
55 (
33 1
3 1
43 1
70 1
53 l
30 1
58 1
13 l
78 1
35 i
93 i
2b
o5 '
0
bO
85
100
/•i
73
95
^
68
83
7)
15)
2)
32)
22)
! 13)
: l)
; 17)
1 28)
; 21)
I 12)
[ 23)
1 5)
I 3D
I 1*>
1 37)
( 10)
( 26)
1 0)
( 20)
( 34)
( 40)
( 30)
( 291
( 38)
< 10)
( 2»
( 33)
15-
MIN 00
10 (
74 (
100 1
48 1
34 1
90 <
0 1
23 l
48 1
3 i
95 i
34 i
98
20 i
60
69
83
65
8
83
78
90
26
53
34
34
60
5
: 4)
29)
; 40)
: 18)
: 12)
[ 35)
[ 0)
1 9)
I IB)
1 1)
I 38)
1 12)
( 39)
( 8)
I 23)
( 27)
( 32)
( 26)
( 3)
( 32)
( 31)
< 3S>
( 10)
( 21)
( 12)
( 12)
( 23)
( 2)
MEDIAN
OISS ORTHO P
18
70
23
50
56
68
10
43
40
38
48
78
28
65
3
89
25
99
5
73
80
93
33
89
45
95
56
S3
t 7)
( 28)
( 9)
( 20)
( 22)
( 27)
( 4)
( 17)
( 16)
( 15)
( 19)
( 31)
( 11)
( 26)
( 1)
( 35)
( 10)
( J9>
( 2)
( 29)
( 32)
( 37)
( 13)
( 35)
( 18)
( 38)
( 22)
>' 21)
I NUfc. A
NO
1 JU
2«0
200
346
341
297
31
256
324
276
273
396
213
«06
201
477
184
H35
34
366
517
D79
21b
36*
3-42
3J/
3dft
294

-------
PERCENT OF LAKES rflTH hIGHEK VALUES (NUMBLY OK LAKES *ITH HlGHE* VALUES)
LAKE
CODE  LAKE NAME
1240  LAKE THONOTOSASSA
12<»1  LAKE TOHOPEKALIGA
1242  TKOUT LAKE
1243  LAKE WEOHYAKAPKA
1246  LAKE YALE
1247  LAKE MUNSON
134H  LAKt SEMINOLE
1249  LAKE LAWNE
1250  LAKE TAMPON
1252  LAKE ELOISE
1258  LAKE JESSIE
1261  EAST LAKE TOHOPEKALIGA
1264  PAYNE'S PRAIRIE LAKE (^0
MEDIAN
TOTAL P
20
33
15
75
98
8
35
0
83
30
73
80
11
( 8)
< 13)
( 6)
( 30)
( 39)
( 3)
( 14)
< 0)
( 33)
( 12)
( 29)
( 32)
( 4)
MEDIAN
lNGr?b N
85
40
e
91
58
5
48
0
98
50
88
9fi
65
( 34)
( 16)
( 3)
( 36)
( 23)
( 2)
( 19)
( 0)
( 38)
( 20)
( 35)
( 38)
( 26)
500-
MEAN
58
38
43
83
90
8
35
0
100
fe3
88
93
25
SEC
( 23)
( 15)
( 17)
( 33)
( 36)
( 3)
( 14)
( 0)
( 40)
( 25)
( 35)
( 37)
( 10)
MEAN
CHLO-'A
40
48
23
88
63
8
10
20
90
2rt
6P
98
15
( 16)
( 19)
( 9)
( 35)
( 25)
( 3)
( 4)
( 8)
( 36)
( 11)
( 24)
( 39)
( b)
Ib-
MIN DO
48
40
13
74
83
16
69
43
60
16
26
55
40
( 18)
( 16)
( 5)
( 29)
( 32)
( 6)
( 27)
( 17)
( 23)
( 6)
( 10)
< 22)
( 35)
MEDIAN
DISS 0*Tr!0 f
15
30
a
84
75
13
63
35
bO
20
84
99
0
( 6)
( 12)
t 3)
I 33)
( 30)
( 5)
( 25)
( 14)
< 24)
( 8)
( 33)
( 39)
( 0)
INUEX
NO
2t>6
229
110
495
467
58
2bO
*8
491
207
419
523
c?06

-------
LA
-------
    i RANKED ar INDEX NOS.




•
-------
    APPENDIX B
CONVERSION FACTORS

-------
                CONVERSION FACTORS




Hectares x 2.471 = acres


Kilometers x 0.6214 = miles



Meters x 3.281 = feet

                         -4
Cubic meters x 8.107 x 10   = acre/feet


Square kilometers x 0.3861 = square miles


Cubic meters/sec x 35.315 = cubic feet/sec


Centimeters x 0.3937 = inches


Kilograms x 2.205 = pounds



Kilograms/square kilometer x 5.711 = Ibs/square mile

-------
    APPENDIX C
TRIBUTARY FLOW DATA

-------
                                   TRIBUTARY FLOW INFORMATION FOR FLORIDA
                                                                              8/25/75
LAKE CODE 1214
       LAKE GRIFFIN
TOTAL DRAINAGE AREA OF LAKE(SQ KM)
TRIBUTARY
1214A1
121481
1214D1
1214ZZ
SUB-DRAINAGE
AREA(SO KM) JAN
11.3
1678.3
2007.2
282.3
0.05
7.99
9.40
1.19
FES
0.07
9.49
11.04
1.39
2007,
MAR
0.07
10.39
11.84
1.50
,2
APR
0.06
9.51
10.82
1.36

MAY
0.05
7.50
8.07
1.02



"NORMALIZED FLOwS(CMS)
JUN JUL AUG
0.04
6.65
7.25
0.91
0.05
6.99
8.07
1.02
0.06
8.27
9.60
1.22

SEP
0.06
9.74
10.62
1.33

OCT
0.07
8.86
11.02
1.39

NOtf
0.05
7.70
9.20
1.16

DEC
0.05
7.31
8.58
1.08

MEAN
0.06
8.36
9.62
1.21
     MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
1214A1
MONTH   YEA»
MEAN FLOW  DAY
121461
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
73
73
73
73
73
73
73
73
73
73
74
74
73
73
73
73
73
73
73
73
73
73
.T*
74
0.03
0.05
0.01
0.03
0.01
0.02
0.03
0.03
0.01
0.02
0.02
0.01
6.07
6.74
2.01
1.03
3.00
13.63
7.45
1.27
2.63
0.99
0.88
0.96
18
8
13
14
8
5
a
14
4
9
6
2
18
8
13
14
8
5
8
14
4
9
6
2
                                                                   SUMMARY
                        TOTAL DRAINAGE AREA OF LAKE =    2007.2
                        SUM OF SUB-DRAINAGE AREAS   =    1971.9
                                                                  TOTAL FLOW IN  =    115.65
                                                                  TOTAL FLOW OUT  -    115.50
                                       FLOW  DAY

                                       0.02
                                       O.OU
                                       0.01
                                       0.01
                                       0.01
                                       0.03
                                       0.01
                                       0.02
                                       0.01
                                       0.01
                                       0.03
                                       0.01
                                      15.29
                                       b.23
                                       0.17
                                       0.8b
                                       0.91
                                      15.46
                                      11.69
                                       0.85
                                       2.75
                                       O.OB
                                       0.91
                                       0.85
                                                                     FLOW  DAY
                                                                                       FLOW

-------
                                   TRIdUTARY FLOW INFORMATION FOR FLORIDA
                                                                       8/25/75
LAKE CODE
LAKE GRIFFIN
     MEAN MONTHLY FLOwS AND DAILY FLOWS(CMS)
TRIBUTARY   MONTH   YEAH
1214D1
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
73
73
73
73
73
73
73
73
73
73
74
74
73
73
73
73
73
73
73
73
73
73
74
7<*
         MEAN FLOW  DAY
2.92
3.60
2.46
0.65
0.37
18.04
7.90
-0.25
-0.14
3.85
0.65
1.02
0.65
1.13
0.23
0.76
0.23
0.51
0.65
0.68
0.17
0.45
0.48
0.11
18
8
13
14
8
5
8
14
4
9
6
2
18
8
13
14
8
5
8
14
i»
9
6
2
FLOW  DAY
                                                   4.81
                                                   1.30
                                                   3.00
                                                   0.37
                                                  22.80
                                                  16.06
                                                   0.03
                                                  -0.17
                                                  16.17
                                                   0.37
                                                   0.96
                                                   0.42
                                                   1.98
                                                   0.20
                                                   0.11
                                                   0.17
                                                   0.71
                                                   0.37
                                                   0.51
                                                   0.20
                                                   0.25
                                                   0.76
                                                   0.17
FLOW  DAY
FLOW

-------
        APPENDIX D





PHYSICAL and CHEMICAL DATA

-------
STORET RETRIEVAL DATE 75/03/35
                                                                  121401
                                                                 28 50 03.0 081 52 08.0
                                                                 LAKE GRIFFIN
                                                                 12069   FLORIDA

DATE
FROM
TO
73/03/14
73/09/06
73/11/05



DATE
FROM
TO
73/03/14
73/09/06
73/11/05


TIME DEPTH
OF
DAY FEET
09 45 0000
11 35 0000
15 25 0000
15 25 0001
15 25 0004

TIME DEPTH
OF.
DAY FEET
09 45 0000
11 35 0000
IS 25 0000
15 25 0004
00010
WATER
TEMP
CENT
25.5
29.7
23.0
23.0
23.0
00665
PHOS-TOT

MG/L P
0.102
0.122
0.128
0.156
00300
DO

MG/L
9.3
8.4

9.6
9.0
32217
CHLRPHYL
A
UG/L
12.4
74.0
58.2

                                          00077     00094
                                         TRANSP   CNDUCTVY
                                         SECCHI   FIELD
                                         INCHES   MICROMHO
                                              30
                                              16
                                              17
290
292
263
263
260
11EPALES
3
00400
PH
SU
9. 40
9.00
9.00
00410
T ALK
CAC03
MG/L
99
86
98
2111202
0005 FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.170
0.090
0.120
00625
TOT KJEL
N
MG/L
3.300
4.000
3.200
00630
N02&N03
N-TOTAL
MG/L
0.170
0.110
0.130
00671
PHOS-DIS
ORTHO
MG/L P
0.013
0.027
0.047
                                                                8.90
                     99
0.140
3.600
                                                                                                       0.170
                                                          0.052

-------
STORE! RETRIEVAL DATE 75/Od/25
                                                                  121402
                                                                 28 50 17.0 081 50 52.0
                                                                 LAKE GRIFFIN
                                                                 13069   FLORIDA

DATE
FROM
ro
73/03/14
73/09/06
73/11/05



TIME DEPTH
OF
DAY FEET
10 05 0000
11 20 0000
IS 40 0000
15 40 0001
15 40.0004
00010
WATER
TEMP
CENT
25.5
29.4
22.1
22.1
22.1
11EPALES

00300
00

MG/L
9.1
9.2

9.8
9.2

00077
TRANSP
SECCHI
INCHES
15
16
19



00094
CNDUCTVY
FIELD
MICROMHO
290
298
261
261
260
3
00400
PH

SU
9.30
9.00
8.90

8.90

00410
T ALK
CAC03
MG/L
100
88
100

101
2111202
0005
00610
NH3-N
TOTAL
MG/L
0.160
0.090
0.120

0.120
FEET DEPTH
00625
TOT KJEL
N
MG/L
2.200
3.800
3.300

3.400
00630
N02^N03
N-TOTAL
MG/L
0.160
0.100
0.130

0.150
00671
PHOS-DIS
ORTHO
MG/L P
0.012
0.026
0.055

0.060
                      0066b     32217
  DATE   TIME DEPTH PHOS-TOT  CHLRPHYL
  FROM    UF                     A
   TO    DAY  F£ET   MG/L P     JG/L

73/03/14 10 05 0000    0.095      28.0
73/09/06 11 20 0000    0.095     105.9
73/11/05 15 40 0000    0.125      82.6
         15 40 OOOt    0.123

-------
STORET RETRIEVAL DATE 75/08/25
                                                                  121403
                                                                 28 51 29.0 081 50 58.0
                                                                 LAKE GRIFFIN
                                                                 12069   FLORIDA
                                                                 11EPALES
                                                                 3
 2111202
0005 FEET
                                                                                                DEPTH

DATE
FROM
TO
73/03/14
73/09/06
73/11/05



TIME DEPTH
OF
DAY FEET
10 15 0000
11 05 0000
15 15 0000
15 15 0001
15 15 0004
00010
WATER
TEMP
CENT
?6.2
29.4
22.7
22.7
22.6
00300
DO

MG/L
9.1
8.6

8.8
8.8
00077
TRANSP
SECCHI
INCHES
18
24
13


00094
CNDUCTVY
FIELD
MICROMHO
285
292
267
267
267
00400
PH

SU
9.20
8.90
8.70

8.70
00410
T ALK
CAC03
MG/L
102
98
103

102
00610
NH3-N
TOTAL
MG/L
0.180
0.090
0.110

0.130
00625
TOT KJEL
N
MG/L
2.500
3.600
3.100

3.000
00630
N02&N03
N-TOTAL
MG/L
0.160
0.110
0.130

0.150
00671
PHOS-DIS
ORTHO
MG/L P
0.012
0.030
0.047

0.059
                      00665     32217
  DATE   TIME DEPTH PHOS-TOT  CHLRPHYL
  FROM    OF                     A
   TO    DAY  FEET   MG/L P     UG/L

73/03/14 10 15 0000    0.099      2fl.O
73/09/06 11 05 0000    0.083     117.8
73/11/05 15 15 0000    0.116      94.8
         15 15 0004    0.157

-------
       APPENDIX E
TRIBUTARY and WASTEWATER
  TREATMENT PLANT DATA

-------
STORE! RETRIEVAL DATE 75/08/25
                                                                  1214A1
                                                                 28 51 30.0 081 53 00.0
                                                                 DEAD RIVER
                                                                 12055   7.5 LEESBURG
                                                                 T/LAKE GRIFFEN
                                                                 ST HWY 466A BRDG NEAR LK GRIFFEN ST PARK
                                                                 IIE^ALES             2111204
                                                                 4                   0000 FEET  DEPTH
DATE
FROM
TO
73/03/18
73/04/08
73/05/13
73/06/14
73/07/08
73/08/05
73/09/08
73/10/14
73/11/0^
73/12/09
74/01/06
74/02/02
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
09
09
08
08
09
08
09
13
08
08
10
13
30
15
25
55
35
30
05
30
45
45
15
15
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
017
010K
010K
035
015
042
054
054
092
192
036
088
MG/L
2.730
2.300
3.100
4.100
4.800
1.400
2.700
1.800
2.000
2.000
1.500
1.300
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
oie
016
030
115
090
040
120
072
052
148
170
040
MG/L P
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
034
032
031
028
016
017
020
048
028
028
092
090
MG/L P
0
0
0
0
0
0
0
0
0
0
0
0
.180
.130
.140
.100
.095
.085
.070
.095
.110
.100
.160
.150
          K VALUE KNOWN TO BE
          LESS THAN INDICATED

-------
STORET RETRIEVAL DATE 75/08/25
                                                                   1214B1
                                                                 28 52 30.0 081 47 00.0
                                                                 HAINES CREEK
                                                                 12      7.5 LEESBURG E
                                                                 T/LAKE GRIFFEN
                                                                 ST HMY 44 BRDG
                                                                 11EPALES
                                                                             2111204
                                                                            0000 FEET  DEPTH
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/08
73/05/13
73/06/14
73/07/08
73/08/05
73/09/08
73/10/14
73/11/04
73/12/09
74/01/06
08 30
10 15
09 20
09 40
10 35
09 20
09 02
14 30
10 10
09 35
11 10
10630
I&N03
•OTAL
IG/L
0.010K
0.010K
0.026
0.018
0.010K
0.020
0.013
0.025
0.450
0.108
0.064
00625
TOT KJEL
N
MG/L
2.800
2.200
2.900
2.600
3.100
2.400
2.200
2.100
2.300
1.600
3.050
00610
NH3-N
TOTAL
MG/L
0.010
0.022
0.063
0.072
0.044
0.134
0.132
0.440
0.024
0.300
0.470
00671
PHOS-DIS
ORTHO
MG/L P
0.019
0.016
0.013
0.017
0.008
0.029
0.015
0.027
0.016
0.028
0.024
00665
PHOS-TOT

MG/L P
0.105
0.100
0.075
0.075
0.065
0.110
0.052
0.040
0.060
0.060
0.075
                   K  VALUE KNOWN TO BE
                   LESS THAN INDICATED

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STORE! RETRIEVAL DATE 75/08/25
                                                                   121401
                                                                 28 29 30.0 081 50  00.0
                                                                 OK|_A*AHA RIVER
                                                                 12      7.5 EMERALOA  ISL
                                                                 0/LAKE GRIFFIN
                                                                 ST H«Y 42 8ROG M OF STARKES FERRY
                                                                 11EPALES              2111204
                                                                 4                   0000 FEET  DEPTH
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/08
73/05/13
73/06/14
73/07/08
73/08/05
73/09/08
73/10/14
73/11/04
73/12/09
74/01/06
74/02/02
10 10
09 45
08 50
09 20
10 10
09 00
09 30
14 00
09 30
09 10
10 45
13 40
i0630
I&N03
OTAL
IG/L
0.011
0.010K
0.010K
0.015
0.024
0.021
0.030
0.010K
0.044
0.014
0.028
0.008
00625
TOT KJEL
N
MG/L
3.500
2.900
3.300
3.500
3.200
3.200
3.900
2.200
1.600
2.100
2.000
1.400
00610
NH3-N
TOTAL
MG/L
0.058
0.052
0.044
0.126
0.105
0.273
0.072
0.220
0.024
0.060
0.100
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.025
0.024
0.021
0.018
0.010
0.018
0.012
0.025
0.012
0.024
0.020
0.020
00665
PHOS-TOT

MG/L P
0.135
0.115
0.095
0.080
0.065
0.095
0.075
0.095
0.090
0.110
0.080
0.085
                       K VALUE KNOWN TO BE
                       LESS THAN INDICATED

-------
STORE! RETRIEVAL DATE 75/08/35
                                                                  1214EA          P01214EA     P011000
                                                                 38 49 00.0 031 52 00.0
                                                                 LEES6URG
                                                                 12055   7.5 LEEBURG EAST
                                                                 D/LAKE GRIFFIN
                                                                 LAKE GRIFFIN
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH

DATE TIME DEPTH
FROM OF
TO DAY FEET
73/02/05 23 30
CP < T ) -
73/02/06 23 30
73/03/14 23 00
CP(T)-
73/03/15 23 00
73/04/09 23 00
CP < T ) -
73/04/10 23 00
73/05/06 11 00
CP(T>-
73/05/07 11 00
73/06/18 11 30
CP(T)-
73/06/18 23 30
73/07/10 23 00
CP(T>-
73/07/11 23 00
73/08/07 06 00
CP(T)-
73/08/07 23 00
73/09/10 11 00
cpm-
73/09/10 23 00
73/10/21 23 00
CP(T>-
73/10/22 23 00
73/11/18 23 00
CP
-------