U.S. ENVIRONMENTAL PROTECTION AGENCY
           NATIONAL EUTROPHICATION  SURVEY
                    WORKING PAPER SERIES
                                          REPORT
                                           ON
                                        LMNELAKE
                                       ORANGE OXJNIY
                                         FLORIDA
                                       EPA REGION IV
                                    WORKING PAPER No, 262
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
                             and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA

 699-440

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                                                                                       C-
                                                           REPORT
t                                                            ON
v                                                       LAWNELAKE
i                                                     ORANGE COUNTY
5?                                                        FLORIDA
s                                                     EPA REGION IV
                                                   WORKING PAPER No, 262
                              WITH THE COOPERATION OF THE
                    FLJDRIDA DEPARTMENT OF ENVIRONMENTAL REGULATION
                                        AND THE
                                FLORIDA NATIONAL GUARD
                                     DECEMBER,  1977

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

  Sections
  I.   Conclusions                                                1
 II.   Lake and Drainage Basin Characteristics                     4
III.   Lake Water Quality Summary                                 5
 IV.   Nutrient Loadings                                         10
  V.   Literature Reviev/ed                                       15
 VI.   Appendices                                                16

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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 freshwater 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)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)]5
and v/ater quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.

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                                    iii
    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
                      NATIONAL EUTROPHICATION SURVEY

                               STUDY LAKES

                             STATE OF FLORIDA
LAKE NAME

Alligator
Apopka
Banana
Crescent
Doctors
Dora
East Tohopekaliga
Effie
Eloise
George
Gibson
Glenada
Griffin
Raines
Hancock
Horseshoe
Howe!1
Istokpoga
Jessie
Jessup
Kissimmee
Lawne
Lulu
Marion
Minnehaha
Minneola
Monroe
Munson
Okeechobee

Poinsett
Reedy
Semi no!e

Semi no!e
South
Talquin
Tarpon
Thonotosassa
Tohopekaliga
Trout
Weohyakapka
Yale
COUNTY

Columbia
Lake, Orange
Polk
Flagler, Putnam
Clay
Lake
Osceola
Polk
Pol k
Putnam, Volusia
Polk
Highlands
Lake
Polk
Polk
Semi no!e
Orange, Semi no!e
Highlands
Polk
Seminole
Osceola
Orange
Polk
Polk
Orange
Lake
Seminole, Volusia
Leon
Glades, Hendry, Martin,
 Okeechobee, Palm Beach
Brevard, Orange, Osceola
Polk
Jackson, FL; Decatur,
 Seminole, GA
Pinellas
Brevard
Gadsden, Leon
Pinellas
Hillsborough
Osceola
Lake
Polk
Lake

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 LAWNE    LAKE
Tributary Sampling Site
Lake Sampling Site
Sewage Treatment Facility
            1     11/2 Km.
                    Mi.
        Fla.

       Map Location

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                                LAWNE LAKE
                             STORE! NO.  1249

I.   CONCLUSIONS
    A.   Trophic Condition:
            Survey data indicate that Lawne Lake is highly eutrophic.   It
        ranked thirty-eighth when the 41  Florida lakes sampled in 1973
        were compared using a combination of six parameters*.   All  of the
        other lakes had less median total phosphorus,  26 had less median
        dissolved phosphorus, all the rest had less median inorganic nitro-
        gen and greater mean Secchi disc transparency, and 32 had less  mean
        chlorophyll a_.
            Dredging operations were in  progress during the year of sampling
        resulting in changes in the water quality as shown by the decrease
        in Secchi disc  transparency, chlorophyll a^ levels, and phytoplankton
        counts (see data summary, page 6).  High concentrations of sediments
        were noted in the September and  November phytoplankton samples  indi-
        cating very high turbidity that  most likely suppressed primary  pro-
        ductivity.
            An alum treatment after dredging reduced the turbidity from
        about 600 Jackson turbidity units (JTU)  to less than 70 JTU, and
        the Secchi disc transparency increased significantly (Gabor, 1975).
    B.   Rate-Limiting Nutrient:
            Algal assay results indicate that primary  productivity in Lawne
  See  Appendix  A.

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                                 2
    Lake was limited by nitrogen at the time the sample  was  collected
    (03/14/73).   The lake data indicate phosphorus  was the limiting
    nutrient at the other two sampling times;  however, as  noted  above,
    primary productivity probably was light-limited at those times.
C.  Nutrient Controllability:
        1.   Point sources—At this time,  no known wastewater treatment
    plants  impact Lawne Lake.  As of November,  1973,  sewage  formerly
    treated at the Lawne Lake Shores wastewater treatment  plant  was
    diverted to the City of Orlando treatment facilities.  An estimated
    4.3% of the total  phosphorus and 5.1% of the total nitrogen  inputs
    were contributed by the Lawne Lake Shores plant during six months of
    discharge in the Survey sampling year.
        The sampling year phosphorus loading of 15.02 g/m2/year  is over 23
    times that proposed by Vollenweider (Vollenweider and  Dillon, 1974)
    as a eutrophic loading.  On the basis of Survey data,  it is  calculated
    that diversion of the Lawne Lake Shores effluent reduced the loading  to
    14.37 g/m2/yr; and even though the eutrophic level for Florida lakes
    may be  higher than that suggested by Vollenweider (see page  14),  it
    does not seem likely that the effluent diversion will  result in a
    significant improvement in the condition of the lake.
        2.   Non-point sources—It is estimated that the  gaged tributaries
    contributed over 68% of the phosphorus and nearly 59%  of the nitrogen
    reaching the lake during the sampling year.
        The phosphorus export rate of Canal B-l  was an exceptionally

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                             3



high 1,052 kg/km2 during the sampling year (page 13)  and may have



been the result of urban runoff.   The 1970 U.S.G.S.  Orlando West



quadrangle map indicates the canal  drains predominantly urban areas.

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II.   LAKE AND DRAINAGE BASIN CHARACTERISTICS1"

     A.   Morphometry  .

         1.   Surface area:   0.63 kilometers2.

         2.   Mean depth:   1.1  meters.

         3.   Maximum depth:   1.8 meters.

         4.   Volume:   0.693  x 106 m3.

         5.   Mean hydraulic  retention  time:   36 days.

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

         1.   Tributaries -


             Name

             Canal  B-l
             Canal  C-l
             Canal  D-l
             Minor tributaries &
              immediate drainage -                 3.6           0.07

                         Totals                   10.1            0.22**

         2.   Outlet -

             Canal  A-l                            10.7***        0.22

     C.   Precipitation****:

         1.   Year of sampling:  123.5  centimeters.

         2.   Mean annual:   130.5 centimeters.
Drainage
area (km2)*
5.8
0.3
0.4
Mean flow
(m3/sec)*
0.12
0.01
0.02
 t Table of metric equivalents—Appendix B.
 tt Anonymous,  1972.
 * For limits of accuracy,  see Working Paper No.  175,  "...Survey Methods,
   1973-1975".
 ** Sum of inflows adjusted to equal  outflow.
 *** Includes area of lake.
 **** See Working Paper No. 175.

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                                       5
III.   WATER QUALITY SUMMARY
      Lawne Lake was sampled three times during 1973 by means  of a
  pontoon-equipped Huey helicopter.   Each time, a near-surface sample
  for physical  and chemical parameters was collected from one  station
  on  the lake (see map, page v).   During each visit, a single  depth-
  integrated (near bottom to surface) sample was collected for phyto-
  plankton identification and enumeration; and a similar sample was
  collected for chlorophyll a^ analysis.   During the first visit, a  single
  18.9-liter depth-integrated sample was taken for algal assays. Only
  near-surface  samples were taken.
      The sampling results are presented in full in Appendix D and  are
  summarized in the following table.

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PARAMETER




TEMP (C)




DISS OXY (MG/L)




CNDCTVY (MCP-OMO)




PH (STAND UNITS)




TOT ALK (MG/L)




TOT P  (MG/L)




ORTHO P (MG/L)




N02»N03 (MG/L)




AMMONIA (MG/D




KJEL N  (MG/L)




INORG N (MG/L)




TOTAL N (MG/L)




CHLRPYL A (UG/L)




SECCHI  (MtFERS)
A. SUMMARY OF PHYSICAL AND CHEMICAL CHARACTERISTICS FOK
STOHET CODE 1249
1ST SAMPLING <


26.8
,**»*»
265.
9.7
72.
1.140
0.600
0.130
0. 120
4.400
0.250
4.530
2t0.6
0.4
1
KANGE
- 26.8
-.«....«
- 265.
9.7
72.
- 1.140
- 0.600
- 0.130
- 0.120
- 4.400
- 0.250
- 4.530
- 240.6
0.4
SITES
MEAN
26.8
>»„*«.
265.
9.7
72.
1.140
0.600
0.130
0.120
4.400
0.250
4.530
240.6
0.4
3/14/73)

MEDIAN
26.8
..*..**.
263.
9.7
72.
1.140
0.600
0.130
0.120
4.400
0.2SO
4.530
240.6
0.4
2ND

KANGE
29.3 -
4.6 -
203.
6.8 -
32. -
2.560 - 2
0.044 - 0
1.070 - 1
0.260 - 0
3.700 - 3
1.350 - 1
4.7/0 - 4
10.9 -
0.0 -
SAMPLING ( 9/
1

29.3
4.6
203.
6.8
32.
.560
.044
.070
.280
.700
.350
.770
10.9
0.0
SITES
MEAN
- 29.3
4.6
203.
6.8
32.
2.560
0.044
1.070
0.280
3.700
1.350
4.770
10.9
0.0
LAKE LAWNE
5/73)

MEDIAN
29.3
4.6
203.
6.8
.32.
2.560
0.044
1.070
0.280
3.700
1.350
4.770
10.9
0.0
3RD SAMPLING (ll/

R
22.2
6.4
225.
7.3
24.
4.550
0.117
1.990
0.200
5.100
2.190
7.090
3.2
0.0
1
ANGE
- 22.2
6.4
- 225.
7.3
24.
- 4.550
- 0.117
- 1.990
- 0.200
- 5.100
- 2.190
- 7.090
3.2
0.0
SITES
MEAN
22.2
6.4
225.
7.3
24.
4.550
0.117
1.990
0.200
5.100
2.190
7.090
3.2
0.0
7/73)

MEDIAN
22.2
6.4
225.
7.3
24.
4.550 en
0.117
1.990
0.200
5.100
2.190
7.090
3.2
0.0

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Sampl i ng
Date
03/14/73
Dominant
Genera
1.
2.
3.
4.
5.
Kircheriella sp.
Scenedesmus sp.
Flagellates
Raphidiopsis sp.
Microcystis sp.
Other genera
    B.  Biological characteristics:

        1.  Phytoplankton -

                                                                Algae units
                                                                per ml _

                                                                     20,000
                                                                     17,143
                                                                     12,857
                                                                     10,714
                                                                      7,500
                                                                     29,643

                                              Total                   97,857

            09/05/73* - No cells found in sample.

            11/07/73*             1.  Flagellates                       713
                                  2.  Phacus sp.                         267
                                  3.  Euglena sp.                        89
                                  4.  Synedra sp.                        89
                                      Other genera                    _ -__

                                              Total                    1,158

            Chlorophyll ia -

                                                             Chlorophyll  a_
                                                             (yg/D
Sampl ing
Date
03/14/73
09/05/73
11/07/73
Station
Number
1
1
1
                                                                 240.6

                                                                  10.9

                                                                   3.2
* The September and November phytoplankton samples had very heavy concen-
  trations of sediments which apparently resulted in reduced numbers of
  phytoplankton.

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                                 8
C.   Limiting Nutrient Study:

    1.  Autoclaved, filtered,  and nutrient spiked -
        Spike (mg/1)

        Control
        0.050 P
        0.050 P + 1.0 N
        1.0 N
                           Ortho P
               Inorganic N    Maximum yield
Cone,  (mg/1)    Cone,  (mg/1)    (mg/1-dry wt.)
   0.430
   0.480
   0.480
   0.430
0.318
0.318
1.318
1.318
18.9
18.6
35.1
29.6
    2.  Filtered and nutrient spiked -
        Spike (mg/1)

        Control
        0.050 P
        0.050 P + 1.0 N
        1.0 N
                           Ortho P
               Inorganic N     Maximum yield
Cone,  (mg/1)    Cone,  (mg/1)    (mg/1-dry wt.)
   0.384
   0.434
   0.434
   0.384
0.276
0.276
1.276
1.276
26.7
25.2
45.9
37.9
    3.  Discussion -

            The control  yields of the assay alga,  Selenastrum capri-

        cornutum, indicate that the potential  primary productivity

        of Lawne Lake was very high at the time the sample was col-

        lected (03/14/73).  The lack of significant change in yields

        with increased levels of orthophosphorus until  nitrogen was

        also added indicates that the lake was nitrogen limited

        when sampled.  Note that the addition  of nitrogen alone

        produced a yield significantly greater than that of the con-

        trol.

            The lake data indicate phosphorus  was  the limiting nutrient

        in September and November; i.e., the mean  inorganic nitrogen  to

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                         9



orthophosphorus ratios were 19 to 1  or greater,  and phosphorus



limitation would be expected.   However, because  of dredging and



the resulting turbidity, primary productivity probably was light



limited at those times.

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                                      10
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),  except for December
 when two samples were collected.  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
 determined by using a modification of a U.S.  Geological Survey computer
 program for calculating stream  loadings.*  Nutrient  loads shown are
 those measured minus point-source loads,  if any.
     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/year,  at stations B-l, C-l, and D-l and multi-
 plying the means by the ZZ area  in km2.
     The operator of the Lawne Lake Shores wastewater treatment plant
 provided monthly samples and corresponding flow data for part of the
 sampling year.   Nutrient loads  shown are based  on  six months of discharge
 after which time sewage was diverted to the Orlando  treatment facility.
   See Working Paper No.  175.

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                                 11
    A.  Waste Sources:
        1.  Known municipal* -
                        Pop.                  Mean Flow      Receiving
            Name        Served    Treatment   (m3/d)         Water
            Lawne Lake   1,360    act. sludge    29.0        Canal C-l
              Shores**
        2.  Known industrial - None
* Treatment plant questionnaire.
** Effective November, 1973, sewage was diverted to the Orlando treatment
   facility.

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                                 12
    B.  Annual Total Phosphorus Loading - Average Year:
        1.  Inputs -
                                              kg P/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -
                Canal B-l                     6,100           64.5
                Canal C-l                       150            1.6
                Canal D-l                       225            2.4
            b.  Minor tributaries & immediate
                 drainage (non-point load) -  2,540           26.8
            c.  Known municipal STP's -
                Lawne Lake Shores               410            4.3
            d.  Septic tanks* -                   5            0.1
            e.  Known industrial - None
            f.  Direct precipitation** -      	30_            Q.3
                           Total              9,460          100.0
        2.  Outputs -
            Lake outlet - Canal A-l           2,830
        3.  Net annual P accumulation - 6,630 kg.
* Estimate based on 10 lakeshore dwellings; see Working Paper No. 175.
** Brezonik and Shannon, 1971.

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                                     13
    C.  Annual Total Nitrogen Loading - Average Year:
        1.  Inputs -
                                              kg N/          % of
            Source                            yr	          total
            a.  Tributaries (non-point load) -
                Canal B-l                     18,225          51.8
              .  Canal C-l                      1,195           3.4
                Canal D-l                      1,245           3.5
            b.  Minor tributaries & immediate
                 drainage (non-point load) -  12,285          34.9
            c.  Known municipal STP's -
                Lawne Lake Shores              1,805           5.1
            d.  Septic tanks* -                   85           0.2
            e.  Known industrial - None
            f.  Direct precipitation** -         370           1.1
                           Total              35,210         100.0
        2.  Outputs -
            Lake outlet - Canal A-l           16,220
        3.  Net annual N accumulation - 18,990 kg.
    D.  Non-point Nutrient Export by Subdrainage Area:
        Tributary                         kg P/km2/yr        kg N/km2/yr
        Canal  B-l                              1,052***          3,142
        Canal  C-l                                500             3,983
        Canal  D-l                                562             3,112
* Estimate based on 10 lakeshore dwellings; see Working Paper No. 175.
** Brezonik and Shannon, 1971.
*** Unusually high export rate is indicative of urban runoff.

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                                 14
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 Brezonik, 1972).
        Essentially, Vollenweider's "dangerous1 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 "per-
    missible".
        Vollenweider's model may not be applicable to water bodies
    with short hydraulic retention times.
                              Total Phosphorus         Total  Nitrogen
    	Total   Accumulated	Total   Accumulated
    grams/m2/year           15.02      10.52         55.9       25.7

    Vollenweider phosphorus loadings
     (g/m2/yr) based on mean depth and mean
     hydraulic retention time of Lawne Lake:
        "Dangerous"  (eutrophic loading)          0.64
        "Permissible"  (oligotrophic loading)     0.32

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                                     15
V.  LITERATURE REVIEWED
    Anonymous, 1972.   Lawne Lake proposed restoration plan.  Orange Co.
        Poll. Contr.  Dept.  and Orange Co. Eng. Dept., Orlando.

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

    Gabor, Andy.  1975.   Personal conmunication (Lawne Lake restoration
        activities).   Orange Co. Poll. Contr. Dept., Orlando.

    Shannon, Earl E., and Patrick L. Brezonik, 1972.  Relationships between
        lake trophic  state and nitrogen and phosphorus loading rates.  Env.
        Sci. & Techn. ^ (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.

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VI.  APPENDICES
                                   16
                                   APPENDIX A
                                  LAKE RANKINGS

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LAKE DATA TO BE USED IN RANKINGS
LAME
COOE
1301
1302
1303
1206
1207
1208
1209
1210
1211
1212
121*
1215
1217
1219
1220
1331
1323
1234
1227
1238
1339
1230
1231
1232
123-.
1236
1238
1239
LAKE
NAME
ALLIGATOR LAKE
LAKE
LAKE
LAKE
APOPKA
BANANA
CRESCENT
DOCTORS LAKE
LAKE
LAKE
LAKE
LA"KE
DORA
EFFIE
GEORGE
GItJSON
GLENAOA LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
GRIFFIN
HAINES
HANCOCK
HORSESHOE
HOKELL
ISTOKPOGA
JESSUP
KISSIMME.E
LULU
MARION
MINNEHAHA
"INNEOLA
MONROE
OKEECHOdEE
POINSETT
PEEDY
SOUTH
TALOUIN
MEDUN
TOTAL P
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
c
0
0
0
.62C
.103
.660
.065
.084
.103
.480
.129
.167
.134 •
.119
.063
.773
.034
.260
.039
.4*3
.034
.490
.044
.038
.018
.138
.063
.085
.033
.074
.085
MEDIAN
1NOHG N
0.260
O.?30
0.260
0.130
0.120
0.240
0.410
0.165
0.115
0.165
0.260
0.115
0.195
0.130
0.385
0.120
0.390
0.145
1.065
0.360
0.060
0.070
0.300
0.185
0.150
0.330
0.130
0.290
500-
MEAN StC
474.000
484.1 76
483.667
473.889
465.555
482.889
489.000
469.308
470.000
454.167
481.333
462.667
483.300
459.000
464.000
464.323
487.000
463.667
483.000
468.833
43S.OOO
406.333
474.555
472.366
'•69.000
468.500
464.000
462.167
C
87
46
308
10
27
59
361
35
19
27
66
26
97
12
54
6
76
34
376
29
8
3
14
14
6
34
23
9
MEAN
.733
.611
.600
.311
.100
.978
.433
.000
.675
.667
.855
.567
.900
.067
.117
.594
.550
.142
.566
.967
.733
.333
.225
.534
.500
.837
.167
.483
15-
M1N DO
13
8
3
10
10
7
15
11
10
14
6
10
5
11
9
8
7
8
14
7
7
7
10
9
10
10
9
14
.100
.200
.600
.200
.600
.400
.000
.000
.200
.700
.600
.600
.600
.500
.000
.600
.600
.800
.300
.600
.700
.400
.800
.600
.600
.600
.000
.400
MEDIAN
OISS O^ITrtO f>
0.386
0.019
0.293
0.033
0.02B
0.022
0.950
0.063
0.069
0.072
0.038
0.014
0.1S8
0.023
1.175
0.010
0.288
0.007
1.030
0.016
0.012
0.009
0.138
0.010
0.051
0.008
0.038
0.031

-------
LAKE DATA TO  BE  USED  IN  RANKINGS
LA^E
CODE
1240
1241
1242
1243
1246
1247
1248
1249
1250
1252
1258
1261
1264
LAKE
LAKE
LAKE
TROUT
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
LAKE
EAST
MEDIAN
N4V
-------
PERCENT OF LAKES HITH HIGHER VALUES (NUMBER OF LAKES KITH HIGHER VALUES)
LAKE
CODE
1201
130 a
1203
1206
1207
1208
1209
1210
1211
1212
121*
1215
1217
1219
1220
1221
1223
122*
1227
1228
1229
1230
1231
1232
123*
1236
1238
1239
LAKE NAME
ALLIGATOR LAKE
LAKE APOPKA
LAKE BANANA
LAKE CRESCENT
DOCTORS LAKE
LAKE DORA
LAKE EFFIE
LAKE GEORGE
LAKE GIBSON
GLENADA LAKE
LAKE GRIFFIN
LAKE HAINES
LAKE HANCOCK
LAKE HORSESHOE
LAKE HOHELL
LAKE ISTOKPOGA
LAKE JESSUP
LAKE KISSIMMEE
LAKE LULU
LAKE MARION
LAKE MINNEHAHA
LAKE MINNEOLA
LAKE MONROE
LAKE OKEECHOdEE
LAKE POINSETT
LAKE KEEOY
LAKE SOUTH
LAKE TALOUIN
MEDIAN
TOTAL P
25
SO
23
65
60
53
5
45
40
43
4P
70
18
93
11
as
28
90
3
78
88
100
38
68
58
95
63
55
< 10)
( 20)
( 9)
I 26)
( 24)
( 21)
( 2)
( 16)
( 16)
( 17)
( 19)
( 281
( 7)
1 37)
( 4)
( 34)
1 11)
( 36)
( D
( 31)
< 351
I 40)
( 15)
( 27)
( 23)
( 38)
( 25)
( 22)
MEDIAN
INORG N
29
38
29
70
76
35
10
54
81
54
29
SI
43
70
23
76
1«
63
3
29
91
98
15
45
60
13
70
20
( 10)
( 15)
( 10)
( 27)
< 30)
( 14)
( 4)
( 21)
( 32)
( 21)
< 10)
< 32)
( 17)
( 27)
( 9)
( 30)
( 7)
( 25)
I 1)
( 10)
( 36)
( 38)
( 6)
( 18)
( 24)
( 5)
< 27)
( 8)
500-
MEAN SEC
30
10
20
33
60
IB
3
4B
45
85
23
75
13
aO
69
65
5-
73
15
53
95
98
28
40
50
55
69
78
( 12)
I 4)
I 8)
( 13)
( 24)
( 7)
( 1)
( 19)
( 18)
( 34)
I 9)
( 30)
( 5)
( 32)
( 27)
( 26)
( 2)
( 29)
( 6)
( 21)
( 38)
( J9)
( 11)
< 16)
( 20)
( 22)
( 27)
( 31)
MEAN
CHLORA
18
38
5
80
55
33
3
43
70
S3
.30
58
13
78
35
93
25
05
0
bO
85
100
/5
73
95
4S
68
83
( 7)
( 15)
( 2)
( 32)
( 22)
( 13)
( 1>
I 17)
( 28)
( 21)
I 12)
( 23)
( 5)
I 31)
( 14)
< 37)
( 10)
( 26)
( 0)
I 20)
( 34)
( 40)
I 30)
( 29)
( 38)
I IB)
( 27)
( 331
15-
MIN 00
10
74
100
48
34
90
0
23
48
3
95
34
98
20
60
69
83
6S
8
83
78
90
26
53
34
34
60
5
< 4)
( 29)
( 40)
( 18)
( 12)
( 35)
1 0)
( 9)
( 18)
I D
( 38)
( 12)
( 39)
( 8)
( 23)
( 27)
( 32)
( 26)
( 3)
( 32)
1 31)
( 35)
( 10)
( 21)
( 12)
( 12)
< 23)
( 2)
MEDIAN
OISS OtiTHO P
18
70
23
50
56
68
10
43
40
38
48
78
2
-------
PERCENT OF LAKES «ITH HIGHER VALUES (NUMBED OF LUKES *iTn HIGHEH VALUES)
LAKE
CODE
1240
12*1
12*2
1243
1246
12*7
12*8
1249
1250
1252
1258
1261
1264
LAKE NAME
LAKE THONOTOSASSA
LAKE TOHOPEKALIGA
TROUT LAKE
LAKE HEOHYAKAPKA
LAKE rALE
LAKE MUNSON
LAKE SEMINOLE
LAKE LAWNE
LAKE TARPON
LAKE ELOISE
LAKE JESSIE
EAST LAKE TOHOPEKALIGA
PAYNE'S PRAIRIE LAKE I NO
MEDIAN
TOTAL P
20
33
15
75
98
a
35
0
83
30
73
80
11
1 8)
( 131
( 6)
< 30)
( 39)
( 3)
( 14)
( 01
( 33)
1 12)
( 29)
( 32)
( 41
MEDIAN
INOriG N
85
40
8
91
58
5
48
0
98
50
d8
98
65
( 34)
( 16)
( 3)
( 36)
( 33)
( 2)
( 19)
I 0)
1 381
( 20)
1 351
( 38)
( 26)
500-
MEAN SEC
53
38
43
83
90
8
35
0
100
63
88
93
25
( 23>
< 151
( 171
( 3J)
( 361
( 31
< 14)
( 0)
( 40)
( 25)
( 351
( 37)
( 10)
MEAN
CHLO-IA
40
48
23
88
63
ti
10
20
90
23
60
98
15
( 16)
I 19)
( 9)
( 3S)
( 2S>
I 3)
( 4)
( 8)
( 36)
I 11)
( 24)
( 39)
1 6)
15-
MIN 00
48
40
13
74
83
16
69
43
60
16
26
55
90
( 18)
( 16)
( 5)
( 29)
( 321
( 6)
( 27)
( 17)
I 23)
( 6)
( 10)
( 22)
< 3b>
MEDIAN
OISS OHTriO P
is
30
a
84
75
13
63
35
60
20
84
99
0
I 61
( 12)
( 3)
( 33)
( 30)
( 5)
( 25)
( 14)
( 24)
( 8)
( 33)
( 39)
( 0)
INDEX
NO
266
229
110
495
467
58
260
vu
4*1
207
4H
S23
206

-------
LAKES RANKED BY INDEX NOS.




RANK  LAKE CODE  LAKE NAME               INDEX NO






   i  ia30       LAKE MINNEGLA              579




   a  1261       EAST LAKE TOHOPEKALIGA     533




   3  1229       LAKE M1NNEHAHA             517




   4  1243       LAKE WEOHYAKAPKA           495




   5  1250       LAKE TARPON                491




   6  1221       LAKE ISTOKPOGA             477




   7  1246       LAKE YALE                  467




   8  1224       LAKE KISSIMMEE             455




   9  135B       LAKE JESSIE                419




  10  1219       LAKE HORSESHOE             406




  11  1215       LAKE HAINES                396




  12  1238       LAKE SOUTH                 386




  13  1232       LAKE OKEECHUBEE            368




  14  1228       LAKE MARION                366




  15  1206       LAKE CRESCENT              346




  16  1334       LAKE POINSETT              343




  17 . 1207       DOCTORS LAKE               341




  18  1336       LAKE »tED»                 337




  19  1211       LAKE GIBSON                3?*




  20  1208       LAKE DORA                  397




  21  1239       LAKE TALOUIN               394




  22  1202       LAKE APOPKA                280




  23  1212       GLENAOA LAKE               276




  24  1214       LAKE GRIFFIN               373




  25  1240       LAKE THONOTOSASSA          266




  36  1348       LAKE SEMINOLE              360




  27  1310       LAKE GEORGE                356




  38  1241       LAKE TOHOPEKALIGA          229

-------
LAKES RANKED 8r INOEA NOS.
R4NK  LAKE CODE  LAKE NAME               INDEX NO

  39  1331       LAKE MONROE                215
  30  1317       LAKE HANCOCK               313
  31  1353       LAKE ELOISE                307
  33  1364       PAYNE'S PRAIRIE LAKE (NO   306
  33  1330       LAKE HOKELL                301
  34  1303       LAKE BANANA                300
  35  1333       LAKE JESSUP                18*
  36  1201       ALLIGATOR LAKE             130
  37  1343       TROUT LAKE                 110
  38  1349       LAKE LAHNE                  98
  39  1347       LAKE MUNSON                 58
  40  1327       LAKE LULU                   34
  41  1309       LAKE EFFIE                  31

-------
    APPENDIX B





CONVERSION FACTORS

-------
                CONVERSION FACTORS







Hectares x 2.471 = acres



Kilometers x 0.6214 = miles



Meters x 3.281 = feet



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 1249     LAWNE LAKE

     TOTAL DRAINAGE AREA OF LAKE(SQ KM)
                  10.7
          SUB-DRAINAGE
TRIBUTARY  AREA(SQ KM>
1249A1
1249B1
1249C1
1249D1
1249ZZ
JAN
        FE8
                MAR
                        APR
                                MAY
                                      NORMALIZED FLOWS(CMS)
                                        JUN     JUL     AUG
SEP
        OCT
NOV
                        DEC
                               MEAN
10.7
5.8
0.3
0.4
3.5
0.17
0.09
0.01
0.02
0.05
0.20
0.11
0.01
0.02
0.06
0.31
0.17
0.01
0.03
0.09
0.23
0.12
0.01
0.03
0.07
0.10
0.05
0.01
0.02
0.02
0.09
0.05
0.01
0.02
0.02
0.18
0.10
0.01
0.02
0.05
0.28
0.16
0.01
0.03
0.08
0.40
0.22
0.02
0.03
0.12
0.31
0.17
0.01
0.03
0.09
0.20
0.11
0.01
0.02
0.06
0.15
0.08
0.01
0.02
0.04
0.22
0.12
0.01
0.02
0.06
                        TOTAL DRAINAGE AREA OF LAKE =      10.7
                        SUM OF SUB-DRAINAGE AREAS   =      10.0
     MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY   MONTH   YEAR
 1249A1
                            MEAN FLOW  DAY
 1249B1
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
74
0.14
0.18
0.05
0.08
0.07
0.13
0.19
0.16
0.06
0.09
0.09
0.06
0.08
0.10
0.03
0.04
0.04
0.07
0.10
0.09
0.03
0.05
0.05
0.03
18
7
13
17
7
5
8

3
8
12
2
18
7
13
17
7
5
8

3
8
12
2
                         FLOW  DAY

                         0.11
                         0.26
                         0.05
                         0.05
                         0.07
                         0.17
                         0.12
                          0.07
                          0.06
                          0.11
                          0.05
                          0.06
                          0.14
                          0.03
                          0.02
                          0.03
                          0.09
                          0.07

                          0.03
                          0.03
                          0.06
                          0.03
                                                           15
                                                           15
                                                                   SUMMARY
                                                    TOTAL FLOW IN
                                                    TOTAL FLOW OUT
                                                                     FLOW  DAY
                                                                                       FLOW
                                                                      0.07
                                                                      0.03
          2.61
          2.63

-------
                                   TRIBUTARY FLOW INFORMATION FOR FLORIDA
                                                                       a/25/75
LAKE CODE 1249
LAWNE LAKE
     MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)

TRIBUTARY   MONTH   YEAR    MEAN FLOW  DAY

1249C1
124901
1249ZZ
3
4
5
6
7
8
9
10
11
12
1
2
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
74
73
73
73
73
73
73
73
73
73
73
74
74
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.04
0.05
0.00
0.01
0.01
0.03
0.05
0.04
0.01
0.01
0.02
0.01
18
7
13
17
7
5
8

3
8
12
2
18
7
13
17
7
5
8

3
8
12
2
18
7
13
17
7
5
8

3
8
12
2
                                FLOW  DAY

                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.01
                                0.02
                                0.03
                                0.02
                                0.02
                                0.02
                                0.02
                                0.02

                                0.02
                                0.02
                                0.02
                                0.02
                                0.02
                                0.08
                                0.00
                                0.0
                                0.01
                                0.05
                                0.03

                                0.01
                                0.01
                                0.02
                                0.00
FLOW  DAY
FLOW
                                                          15
0.01
                                                          15
0.02
                                                          15
0.01

-------
        APPENDIX D





PHYSICAL and CHEMICAL DATA

-------
STORE! RETRIEVAL DATE 75/08/25
                                                                  124901
                                                                 28 33 47.0 081 26 13.0
                                                                 LAKE LAWNE
                                                                 12095   FLORIDA
                      00010
 . DATE   TIME DEPTH  WATER
  FROM    OF          TEMP
   TO    DAY  FEET    CENT

73/03/14 15 30 0000     26.8
73/09/05 15 20 0000     29.3
73/11/07 15 05 0000     22.2
00300     00077     00094
 DO      TRANSP   CNOUCTVY
         SECCHI   FIELD
MG/L     INCHES   MICROMHO
   4.6
   6.4
15
 1
 0
265
203
225
                                                                 11EPALES
                                                                 3
00400
 PH

 SU

  9.70
  6.80
  7.30
                          00410
                         T ALK
                         CAC03
                          MG/L
72
32
24
                                                      2111202
                                                     0004 FEET
                                                  DEPTH
00610
NH3-N
TOTAL
MG/L
00625
TOT KJEL
N
MG/L
00630
IM02&N03
N-TOTAL
MG/L
00671
PHOS-DIS
ORTHO
MG/L P
0.120
0.280
0.200
4.400
3.700
5.100
0.130
1.070
1.990
0.600
0.044
0.117

-------
STORET RETRIEVAL DATE 75/08/25
                      00665     32217
  DATE   TIME DEPTH PHOS-TOT  CHLRPHYL
  FROM    OF                     A
   TO    DAY  FEET   MG/L P     UG/L

73/03/14 15 30 0000    1.140     240.to
73/09/05 15 20 0000    2.560      10.9
73/11/07 15 05 0000    4.550       3.2
                                                                  124901
                                                                 28 33 47.0 081 26 13.0
                                                                 LAKE LAWNE  .
                                                                 12095   FLORIDA
                                                                 11EPALES
                                                                 3
 2111202
0004 FEET
DEPTH

-------
       APPENDIX E

TRIBUTARY AND WASTEWATER
  TREATMENT PLANT DATA

-------
STORET RETRIEVAL DATE 75/08/25
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/07
73/05/13
73/06/17
73/07/07
73/08/05
73/09/08
73/11/03
73/12/08
73/12/15
74/01/12
74/02/02
09 05
10 10
09 20
09 30
09 45
09 45
15 05
14 20
11 30
12 00
10
                                                                  1249A1
                                                                 28 34 30.0 081 26 00.0
                                                                 UNNAMED CREEK
                                                                 12103   7.5 ORLANDO WEST
                                                                 0/LAWNE LAKE
                                                                 ST HWY 438 BROG
                                                                 11EPALES             2111204
                                                                 4                   0000 FEET  DEPTH
11
45
14
10630
I&N03
OTAL
IG/L
0.034
0.058
0.066
0.023
0.315
0.120
0.010K
0.230
0.028
0.024
0.088
0.240
00625
TOT KJEL
N
MG/L
4.050
1.470
1.760
1.400
4.100
1.900
2.940
1.450
1.000
2.500
2.000
1.800
00610
NH3-N
TOTAL
MG/L
0.086
0.140
0.160
0.096
0.210
0.240
0.040
0.220
0.042
0.072
0.116
0.113
00671
PHOS-DIS
ORTHO
MG/L P
0.500
0.120
0.154
0.132
0.130
0.056
0.019
0.048
0.020
0.028
0.075
0.020
00665
PHOS-TOT

MG/L P
1.200
0.375
0.377
0.290
1.000
0.090
0.045
0.290
0.050
0.083
0.532
0.490

-------
STORE! RETRIEVAL DATE 75/08/35
                                                                  124981
                                                                 28  34  00.0  081 26 00.0
                                                                 UNNAMED  STREAM
                                                                 12       7.5 ORLANDO  WEST
                                                                 I/LAWNE  LAKE
                                                                 BRQG  .25 MI E OF LAWN LAKE
                                                                 11EHALES            2111204
                                                                 4                   0000 FEET
                                                                                       DEPTH
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/07
73/05/13
73/06/17
73/07/07
73/08/05
73/09/08
73/11/03
73/12/08
73/12/15
74/01/12
74/02/02
08 55
09 55
09 15
09 23
09 35
09 25
15 15
14 15
10 30
11 30
10 35
11 08
0630
'&N03
OTAL
G/L
0.016
0.016
0.015
0.010K
0.034
0.026
0.012
0.021
0.048
0.076
0.704
0.560
00625
TOT KJEL
N
MG/L
7.100
5.000
2.720
3.200
5.500
1.890
2.100
8.050
6.000
5.500
4.600
3.100
00610
NH3-N
TOTAL
MG/L
4.800
2.600
1.000
1.470
2.400
0.310
0.150
1.700
3.800
4.100
0.241
0.740
00671
PHOS-DIS
ORTHO
MG/L P
1.600
0.730
1.050
1.260
0.830
0.063
0.147
0.330
1.580
1.700
0.379
0.800
00665
PHOS-TOT

MG/L P
1.800
0.840
1.350
1.300
0.980
0.150
0.200
3.670
2.000
1.880
2.200
2.500

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STORET RETRIEVAL DATE 75/08/85
                                                                  1249C1
                                                                 28 33 30.0  081  26  30.0
                                                                 UNNAMED  CREEK
                                                                 12      7.5 ORLANDO  WEST
                                                                 T/LAwNE  LAKE
                                                                 DIRT RD  BRDG DOWNSTREAM OF  PINE  HILL STP
                                                                 11EPALES             2111204
                                                                 4                   0000  FEET  DEPTH
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/07
73/05/13
73/06/17
73/07/07
73/08/05
73/09/08
73/11/03
73/12/08
73/12/15
74/01/12
74/02/02
35
15
08
09
09 04
09 10
09 30
09 40
14 50
14 05
09 30
13 00
10 25
11 00
0630
I&N03
OTAL
IG/L
1.160
0.990
0.074
0.060
0.014
7.400
0.058
0.340
0.760
0.756
0.368
0.036
00625
TOT KJEL
N
MG/L
1.980
2.400
1.800
1.540
7.350
3.150
3.800
0.750
1.200
1.100
0.500
0.500
00610
NH3-N
TOTAL
MG/L
0.720
0.730
0.210
0.250
0.730
0.930
0.058
0.056
0.088
0.176
0.016
0.045
00671
PHOS-OIS
ORTHO
MG/L P
0.078
0.240
0.099
0.300
0.063
0.850
0.033
0.044
0.208
0.232
0.024
0.025
00665
PHOS-TOT

MG/L P
0.168
0.460
0.440
1.200
0.330
0.920
0.180
0.050
0.490
0.440
0.090
0.065

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STORET RETRIEVAL DATE 75/08/25
                                                                  124901
                                                                 28 34 00.0  081  26 30.0
                                                                 UNNAMED  CREEK
                                                                 12      7.5 ORLANDO WEST
                                                                 T/LAWN LAKE
                                                                 BANK FROM ONE OF THE ROS  W  OF  THE  LAKE
                                                                 11EPALES             2111204
                                                                 it                   0000  FEET   DEPTH
  DATE   TIME DEPTH N02&N03
  FROM    OF
   TO    DAY  FEET
73/03/18
73/04/07
73/05/13
73/06/17
73/07/07
73/08/05
73/09/08
73/11/03
73/12/08
73/12/15
74/01/12
74/02/02
09 20
10 25
09 30
09 40
09 50
09 35
15 00
14 35
10 00
11 30
10 50
11 25
0630
&N03
OTAL
G/L
0.090
0.066
0.024
0.011
0.075
0.069
0.210
0.100
0.216
0.208
0.016
0.016
00625
TOT KJEL
N
MG/L
0.660
0.540
0.540
0.940
3.500
3.200
1.300
0.800
1.100
0.400
2.500
3.000
00610
NH3-N
TOTAL
MG/L
0.054
0.010
0.040
0.040
0.204
0.354
0.770
0.094
0.080
0.069
0.012
0.150
00671
PHOS-OIS
ORTHO
MG/L P
0.021
0.028
0.022
0.032
0.069
0.240
0.126
0.053
0.320
0.312
0.052
0.060
00665
PHOS-TOT

MG/L P
0.045
0.035
0.030
0.120
0.130
0.430
0.200
0.090
0.660
0.455
0.680
0.650

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STORET RETRIEVAL GATE 75/08/25
                                                                  1249BA          AS 12498A     P001360
                                                                 28 37 20.0 081 26 20.0
                                                                 LAKE LAWNE SHORES
                                                                 12103   7.5 ORLANDO
                                                                 T/LAWNE LAKE
                                                                 UNNAMED CREEK
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH

DATE
FROM
TO
1/05/0'
i/oe/i;
>(T>-

TIME DEPTH
OF
DAY FEET
+ 11 00
1 08 30
00630
N02^N03
N-TOTAL
MG/L
0.660
3.300
00625
TOT KJEL
N
MG/L
28.400
15.500
00610
NH3-N
TOTAL
MG/L
5.500
3.900
00671
PHOS-DIS
ORTHO
MG/L P
7.840
2.100
00665
PHOS-TOT
MG/L P
9.000
2.500
50051
FLOW
RATE
INST MGO
0.120
0.120
50053
CONDUIT
FLOW-MOD
MONTHLY
0.120
0.100
73/06/12 Ib 30
73/07/09 10 00
CP < T >-
73/07/09 14 00
0.190
21.000
                   10.400
                              3.570
                               4.100
                                                  0.120
                                                            0.120

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