EPA-9QS/4-87-002
         1985 OPEN LAKE WATER QUALITY CONDITIONS  FOR  LAKE ERIE'S
                        CENTRAL AHO EASTERN BASINS
                               PREPARED BY


                               LAURA A. FAY

                                    AMD

                              DAVID E. RATHKE
                               PREPARED FOR
               UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
                    GREAT LAKES NATIONAL PROGRAM OFFICE
                              230 S, DEARBORN
                             CHICAGO, ILLINOIS
                          GRANT NO.;  R005859-01
                              DAVID ROCKWELL
                              PROJECT OFFICER
                               JANUARY 198?

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                                  TECHNICAL REPORT DATA
                           (HttK rttd liutntcrioiit on ttil rtvtru btfoncotnp'
 PlEPWRT NO.
 EPA-9C5/4-S7-QQ?
 TITLE ANO SUITITLE                                          8. REPORT DATE
  1985  Open Lake Water Quality Conditions  for Lake Erie's
  Central and Eastern Basins
                                                                       January 1987
                                                          S. PERFORMING ORGANIZATION CODE
 AUTHORS)
                                                            PERFORMING ORGANIZATION REPORT NO.
  Laura A. Fay and David E.  Rathke
                                                                ri'.'PO Peoort N'o. ."7-C7
                                                           10. PROCBAM ELEMENT NO.
. PERFORMING ORGANIZATION NAME ANO AOORESS
 Center for  Lake  Erie  Area  Research
 The Ohio  State University
 484 West  12th Ave.
 Columbus, OH 43210
                                                           11. CONTRACT/GRANT NO.

                                                             R-005859-01
 2. SPONSORING AGENCY NAME ANO AOORESS
  Great Lakes National Program  Office
  United States Environmental Protection Agency
  230 South Dearborn Street
  Chicago, Illinois 60604
                                                          13. TYPE OF REPORT ANO PERIOD COVERED
                                                             Final	
                                                          14. SPONSORING AGENCY CODE
                                                            fireat Lakes National  Program
                                                            Office-IJSEPA,  Region  V
 z. SUPPLEMENTARY NOTES
  David  Rockwell, Project Officer
  ABSTRACTTne ^955 |_a|. OlSTRItUTION STATEMENT
Docunent  is  available to public through the
'Jational  Information Service (MTIS),
Springfield, YA  22161
                                              10 SECURITY CLASS (ThttKlporl/
                                                                         21. N(T OF PAGES
                                             2O SECURITY
                                                                        33. PRICE
    f*rm 2229-1 (. 4-77)   iHCVieu* COITION n OMOLCTC
                                               REPRODUCED BY
                                                    US  DEPARTMENT OF COMMERCE

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                                   DISCLAIMER
     The Information in this doument has  been  funded wholly or in part by the
United States Environmental  Protection Agency  under assistance agreement
number R-005859-01 to The Ohio State University;  it has been subject to the
Agency's peer and administrative  review;  and it has been approved for
publication.  The mention of trade  names  or conmerical products does not
constitute endorsement or recommendation  for use.

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                                                                         PAGE 2
                               TABLE OF CONTENTS

                                                                 PAGE NO.

LIST OF TABLES                                                      4

LIST OF FIGURES                                                     5

ACKNOWLEDGMENTS                                                     8

EXECUTIVE SUMMARY                                                   9

INTRODUCTION AND METHODS                                           10
     PROGRAM OBJECTIVES                                            10
     SAMPLING PROGRAM DESCRIPTION                                  11
     METHODS                                                       11
     DATA ANALYSIS                                                 11
     QUALITY CONTROL                                               12

PHYSICAL DATA                                                      13
     THERMAL STRUCTURE                                             14
     TEMPERATURE PATTERNS                                          14
     DISSOLVED OXYGEN                                              17

WATER QUALITY PARAMETERS                                           21
     NUTRIENTS                                                     21
        PHOSPHORUS                                                 21
        NITROGEN                                                   23
        DISSOLVED SILICA                                           25
        ANOXIC REGENERATION OF NUTRIENTS                           26

     PARTICULATES                                                  28
        CORRECTED CHLOROPHYLL A                                    28
        SUSPENDED SOLIDS                                           28

     PRINCIPLE IONS                                                30
        CONDUCTIVITY                                               30
        CHLORIDE                                                   31
        TOTAL ALKALINITY                                           32
        pH                                                         33

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                                                                         PAGE 3
                                                                 PAGE NO.

BASIN COMPARISON                                                   35

OPEN LAKE SAMPLING REGIONS                                         36

TROPHIC CLASSIFICATION                                             38

QUALITY CONTROL SUMMARY                                            40
        STANNOUS CHLORIDE PHOSPHORUS METHOD VERSUS                 43
        ASCORBIC ACID PHOSPHORUS METHOD

REFERENCES CITED                                                   46

TABLES                                                             48

FIGURES                                                           102

APPENDIX A - CENTRAL BASIN DATA SUMMARY BY PARAMETER              145

APPENDIX B - EASTERN BASIN DATA SUMMARY BY PARAMETER              162

APPENDIX C - SURVEY 8 CONTOURS                                    179

APPENDIX 0 - QUALITY CONTROL SUMMARY BY PARAMETER
             (DIFFERENCES BETWEEN DUPLICATE ANALYSIS)             190

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                                                                        PAGE 4
                                LIST  OF  TABLES
                                                                PAGE NO.
1.  1985 Lake Erie Open Lake Water  Quality Survey  Schedule          49
2.  Geographic Coordinates for the  1985  Lake  Erie  Stations          SO
3.  Synopsis of Methods                                            51
4.  1985 Central Basin Mean/Median  Mater Quality Measurements       53
5.  1985 Eastern Basin Mean/Median  Mater Quality Measurements       77
6.  Lake Erie Central  Basin Representative Area Limnion,
    Oxygen and Temperature Data,  1985                              95
7,  Lake Erie Eastern  Basin Representative Area Limnion,
    Oxygen and Temperature Data,  1985                              96
8.  Lake Erie Central  Basin Volume  Weighted Total  Phosphorus
    and Corrected Chlorophyll A Data, 1985                         97
9.  Lake Erie Eastern  Basin Volume  Weighted Total  Phosphorus
    and Corrected Chlorophyll A Data, 1985                         98
10. Central Basin Representative  Area Means and Standard
    Deviations Compared With the Means of the Individual
    Stations Comprising the Area.                                  99
11. Eastern Basin Representative Area Means and Standard
    Deviations Compared With the Means of the Individual
    Stations Comprising the Area.                                  100
12. Quality Control Summary by Parameter
    (Differences Between Duplicate  Analysis)                        101

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                                                                        PAGE 5
                                LIST OF FIGURES

                                                                PAGE NO.

 1.  1985 Lake Erie  Open  Lake  Sampling  Locations                    103

 2  Explanation  of  Median  Plots  (after Reckhow, 1980)              104

 3.  Central  Basin Hypolimnion Thickness (M),  1985                  105

 4.  Eastern  Basin Hypolimnion Thickness (M),  1985                  106

 5.  Median Central  Basin Epilimnion Temperature (C),  1985         107

 6.  Median Central  Basin Hypolimnion Temperature  (C),  1985        108

 7.  Median Eastern  Basin Epilimnion Temperature CO,  1985         109

 8.  Median Eastern  Basin Hypolimnion Temperature  CO,  1985        110

 9.  Median Central  Basin Hypolimnion Dissolved Oxygen
    Concentration  (mg/1),  1985                                    111

10.  Median Central  Basin Hypolimnion Dissolved Oxygen
    Percent  Saturation,  1985                                       112

11.  Central  Basin  Hypolimnion Oxygen Depletion Rates for  1985      113

12.  Central  Basin Mean Hypolimnion Oxygen  Depletion Rates
    from 1929 to 1985                                             114

13.  Median Eastern  Basin Hypolimnion Dissolved Oxygen
    Concentration  (mg/1),  1985                                    115

14.  Median Eastern  Basin Hypolimnion Dissolved Oxygen
    Percent  Saturation,  1985                                       116

15.  Eastern  Basin  Hypolimnion Oxygen Depletion Rates for
    July from 1970  to 1985                                        117

16.  Median Central  Basin Total Phosphorus  Concentrations  for  1985  118

17.  Percent  Composition  of Particulate and Total  Dissolved
    Phosphorus in  Central  Basin, 1985                              119

18.  The Median Central  Basin  Epilimnion and Hypolimnion
    Total Phosphorus, Total Filtered Phosphorus and
    Soluble  Reactive Phosphorus Concentrations for  1985           120

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                                                                        PAGE 6
                                                                PAGE NO.
19,  Central  Basin Limnion Distribution  of  Total  Phosphorus
    In Metric Tons and Percent for  1985                           121

20.  Median Eastern Basin Total  Phosphorus  Concentrations
    for 1985                                                      122

21.  The Median Eastern Basin  Epilimnion and  Hypolimnion
    Total  Phosphorus,  Total Filtered  Phosphorus, and
    Soluble Reactive Phosphorus Concentrations  for  1985            123

22.  Percent Composition of Particulate  and Total Dissolved
    Phosphorus in Eastern Basin,  1985                             124

23.  The Median Central Basin  Epilimnion and  Hypolimnion
    Nitrite and Nitrite, Ammonia  and  Kjeldahl Nitrogen
    Concentrations for 1985                                       125

24.  The Median Eastern Basin  Epilimnion and  Hypolimnion
    Nitrate and Nitrite, Ammonia  and  Kjeldahl Nitrogen
    Concentrations for 1985                                       126

25.  The Median Central Basin  Epilimnion and  Hypolimnion
    Soluble Reactive Silica Concentrations for  1985               127

26.  The Median Eastern Basin  Epilimnion and  Hypolimnion
    Soluble Reactive Silica Concentrations for  1985               128

27.  The Median Central Basin  Hypolimnion Nitrate and  Nitrite
    (ug/1), Ammonia (ug/1) and Dissolved Oxygen (ng/1)
    Concentrations for 1985                                       129

28,  The Median Central Basin  Hypolimnion Total  Filtered
    Phosphorus (ug/1), Soluble Reactive Silica  (ug/1),
    and Dissolved Oxygen Concentrations for  1985                  130

29,  The Median Central Basin  Epilimnion and  Hypolimnion
    Total  Suspended Solids (mg/15,  Volatile  Solids  (mg/1)
    and Chlorophyll A (ug/1), Concentrations for 1985             131

30.  The Median Eastern Basin  Epilimnion and  Hypolimnion
    Total  Suspended Solids (mg/1).  Volatile  Solids  (mg/1)
    and Chlorophyll A (ug/1), Concentrations for 1985             132

31.  Percent Composition of Volatile and Residual Solids
    Central Basin. 1985                                           133

32.  Percent Composition of Volatile and Residual Solids
    Eastern Basin, 1985                                           134

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                                                                        PAGE 7
                                                                PAGE NO.
33. The Median Central  Basin  Epilimnion and  Hypoliinnion
    Conductivity  and Chloride Concentrations for  1985              135

34. The Median Eastern  Basin  Epilimnion and  Hypolimnion
    Conductivity  and Chloride Concentrations for  1985              136

35. Statistical Summary of the Stannous Chloride  (SO
    Total  Phosphorus Data Used For  the Method Comparison           137

36. Statistical Summary of the Ascorbic Acid (AA)
    Total  Phosphorus Data Used For  the Method Comparison           138

37. Comparison of Stannous Chloride {SO  and Ascorbic
    Acid (AA)  Total  Phosphorus Analysis,  1985                     139

38. Statistical Summary of the Computed Difference  Between
    Paired Stannous  Chloride  CSC) and Ascorbic Acid (AA)
    Total  Phosphorus                                              140

39, Statistical Summary of the Stannous Chloride  (SO
    Total  Filtered Phosphorus Data  Used For  the Method
    Comparison                                                    141

40. Statistical Summary of the Ascorbic Acid (AA)
    Total  Filtered Phosphorus Data  Used For  the Method
    Comparison                                                    142

41. Comparison of Stannous Chloride (SO  and Ascorbic
    Acid (AA)  Total  Filtered  Phosphorus Analysis,  1985             143

42, Statistical Summary of the Computed Difference  Between
    Paired Stannous Chloride  (SO and Ascorbic Acid (AA)
    Total  Filtered Phosphorus                                     144

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                                                                         PAGE 8
                                ACKNOWLEDGMENTS

     The authors of this report would like to express their appreciation to the
CLEAR  stiff  who  helped in completing this project, especially to the crew of
the Research Vessel Hydra.  In particular, we would like to thank Mr.   Cheng-Mu
Shaio, Ms.  Helen Kundtz and Mr.  Todd Parfitt for their technical support.  In
addition, we would like to thank Mr.  Fernando Rosa of the  Canada  Centre  for
Inland  Waters  (CCIW/NWRI)  for  providing  the  1929  - 1984 corrected oxygen
depletion rates for the representative area and for  reviewing  the  1985  rate
calculations.

     We would alsc like to acknowledge the financial support  provided  by  the
U.S.   Environmental  Protection  Agency - Great Lakes National Program Office,
especially our Project Officer, Mr.  David C.  Rockwell.

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                                                                         PAGE  9
                               EXECUTIVE SUMMARY

     The 1985 Lake Erie open lake surveillance/monitoring program followed  the
recommended   study   plan  sanctioned  by  the  Water  Quality  Board  of  the
International Joint Commission, Great Lakes  Regional   Office.    Eight  surveys
were   conducted   on  the  central  basin  and  five   on  the   eastern  basin.
Concentrations of oxygen, phosphorus, nitrogen, silica, chloride,  chlorophyll,
suspended  solids  and several additional parameters were determined.   Detailed
results and data interpretation are presented in this  report.

     The 1985 central basin data indicated a  significantly  longer  stratified
period  than  is  generally  recorded  for  the  basin.  The mean annual  oxygen
depletion rate calculated was 3.7 mg/1/month, which was slightly  greater  than
rates  recorded  1n  recent  years.   By  early  f'jgust  the nypolimnion waters
contained less than 2 mg/1 of dissolved oxygen.  At.nxic conditions were present
through  much  of  late  August  and  into  September     The anoxia resulted in
significant sediment regeneration of phosphorus into the overlying waters.   In
contrast,  the epilimnion concentrations of phosphorus and chlorophyll were low
through much of the stratified period.

     The eastern basin data indicated an oxygen rich  hypolimnion  through  the
entire  stratified  period.  Epilimnion and hypolinnion nutrient concentrations
were similar and did not fluctuate significantly during the field season.   The
eastern  basin  epilimnion  water  quality is better than that recorded for the
central  basin  however,  the  difference   in   phosphorus   and   chlorophyll
concentrations is becoming less as a result of central basin improvements.

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                                                                       PAGE 10
                           INTRODUCTION AND METHODS


PROGRAM OBJECTIVES

     The open lake surveillance/monitoring  program implemented  during  1985  was
designed specifically to comply with the Great Lakes Water  Quality  Agreement of
1978.  The plan was developed in 1984 by the Lake EMe  Task  Force  under  the
direction of the Surveillance Work Group and subsequently endorsed  by  the Water
Quality Board of the International Joint Commission,

     Under Annex 3 of the Agreement, 1wo goals specific to  Lake Erie concerning
the phosphorus control  program are put forward:

     1. The restoration of year-round aerobic conditions  in the bottom
        waters of the central basin of Lake Erie

     2. The reduction in algal bionwss.

Under Annex 11, the Agreement specifies the purpose of  surveillance/monitoring
activities,  calling  for a program designed to identify  non-achievement of the
Agreement objectives, evaluation of trends, and a program to  provide   baseline
open lake data collection, sample analysis  and evaluation.  The current program
provides the data necessary to comply with  the open lake  considerations of  the
Agreement.

     Since 1973, the open lake surveillance/monitoring prog*am  has  been focused
on  obtaining  seasonal  data  for  total phosphorus, corrected chlorophyll and
dissolved oxygen.  Total phosphorus and chlorophyll  concentrations  have  been
tracked  as eutrophication Indices for long term trend analysis and to evaluate
the effectiveness of remedial actions designed to curb  the  eutrophication  of
the  Great  Lakes.   Since one of the most  serious results  of eutrophication is
the depletion of oxygen in the  bottom  waters,  oxygen   data  is  utilized  to
calculate  hypolimnetic  oxygen depletion rates.  Ultimately, as the phosphorus
and chlorophyll concentrations are reduced, the seasonal  rate at which oxygen
is  depleted  from  the  hypolimnion  is expected to be  reduced.  In  addition,
several other limnological parameters have  also been evaluated  to help explain
variations  in  parameter  concentrations  due  to  lake  processes and for the
development and refinement of lake models.

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                                                                        PAGE  11
SAMPLING PROGRAM DESCRIPTION

     Scheduling, sampling strategies,  and parameters  used   for   the   1985   open
lake study conformed to the revised Great Lakes International Surveillance Plan
(SUSP) developed by the Lake Erie Task  Force  U986)   under the  Surveillance
Work Group of the International  Joint Commission.

     Eight open lake surveys were conducted in the central   basin   during  the
1985  field  season  beginning on May 15th and ending on November  15th,   Survey
dates and survey durations are presented in Table  1.   Due  to the stability  and
less eutrophic nature of the eastern basin, relative  to the central  basin, only
five surveys were conducted in this basin.  A total of 14  stations were  located
throughout  the  central (n=10)  and eastern (n=4)  basins (Figure 1).  A  listing
of the  geographic  coordinates,  bottom  depths  and  basin designations  are
presented in Table 2.


METHODS

     A summary of the methods employed for the 1985  season can  be  seen in  Table
3.  A detailed description of the methods are presented in Letterhos (1982).  A
copy of this methods manual is on  file  with  the  1JC  Great   Lakes  Regional
Office, Windsor, Ontario and with US-EPA Region V, Chicago, Illinois as  well as
with the Center for Lake Erie Area Research, Columbus, Ohio.

     During the 1985 field season, three forms of  phosphorus,   three  forms  of
nitrogen  and  dissolved silica  were measured at all  stations and  depths within
the central and eastern basin representative areas.   The soluble nutrients were
examined  within 12 hours of filtration while the  remaining forms  were analyzed
after returning to the land based laboratory.


DATA ANALYSIS

     Raw data analysis was accomplished utilizing  Biomedical Computer  Programs
(BMDP)  that  calculate limnion Means and medians  with the appropriate variance
statistics.  Analyisis of data over the  last  few  years  has   indicated  that
medians  are the most relevant indicator of the actual conditions  in Lake Erie.
Generally, mean and median values are very  similar,   however,   when  extremely
high or low values are encountered (i.e., during anoxic conditions)  and account
for only a small percent of the  data  set  (<  IDS),  the  median  value  best
illustrates the overall data being presented.

     A modified version of the notched block plot  (Reckhow, 1980J  as  explained
in  Figure  2   is used to present seasonal concentrations.  The median point is
not usually in  the center of the box indicating that several  high  values  are
skewing  the  means  upward.   Tables  for  the  central and eastern basins are
presented with  the limnlon means and medians for those who find it difficult to
adjust to the use of medians (Tables 4 and 53.

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                                                                        PAGE  12
     Volume weighted data for nutrients, chlorophyll  and dissolved oxygen  that
are  presented  1n  Tables 6-9 are derived from the Survey  8 volume  weighting
program (Hanson et al,1978).  Dissolved oxygen depletion rate calculations were
made  following the procedure that adjusts for vertical  mixing (Rosa and  Burns,
1986],  Additional rate calculations, adjusting  for   temperature,  hypolimnion
thickness, an initial dissolved oxygen were provided  by  F.   Rosa  (CCIW-NWRI).

     BMDP programs were also used to examine  the  relative  significance  when
comparisons were made between data sets.  This type of analysis was carried out
for inter and intra basin comparisons.


QUALITY CONTROL

     A  quality  control  program  is  routinely  followed   for  all   pertinent
parameters,  constituting  approximately  ten  percent  of   the  total sampling
effort.  This program utilizes a series  of  known standards, duplicates  and
spikes, as suggested by the International Joint Commission, to monitor accuracy
and precision and to provide estimates of standard deviations.

     A detailed description of the quality control program   (Quality   Assurance
Project  Plan - Open Lake Surveillance Monitoring Program;   May 1 1985 to June
30, 1986) is on file with the U.S.  Environmental  Protection  Agency   -   Great
Lakes Ntional Program Office and Quality Assurance Office.

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                                                                        PAGE  13
                                 PHYSICAL DATA


     Lake Erie is comprised of three basins  {western,   central,   and  eastern)
which  are  unique  both  physically  and chemically, with much of their unique
nature attributed to their distinct  individual   morphologies.    Lake  Erie   in
itself  is  unique among the Great Lakes.  The Sreat Lakes all  have mean depths
greater than 60 meters, while Lake Erie has  a  mean depth  of  less  than   20
meters.   In particular, the central basin has a mean depth of  only 18.5 meters
making it extremely susceptible to the effects of eutrophication, which in  this
case has resulted in extensive anoxic hypolimnion conditions.

     The central basin is just deep  enough  to  form  and  maintain  a  stable
hypoHmnion  through the summer months but not of sufficient depth to establish
a hypolimnion which has an adequate oxygen reserve.  Due  to  the  increase   in
oxygen  demand  rates  over time (from 1929 through the mid 1970's), periods of
hypolimnion anoxia have betn routinely reported since the early 196Q's  (Rathke
1984).   The degree/duration of the anoxic period is largely dependent upon  the
annual hypolimnion oxygen reserve which is governed by  the  annual  variability
in hypolimnion thickness and temperature.

     The thickness of the hypolimnion is a major consideration  when  developing
a hypolimnion oxygen budget.  The establishment and subsequent seasonal changes
in the thermocline thickness are attributed to  meteorological   conditions   and
events  which  take  place during the spring and through the stratified period.
Since the initial quantity of oxygen found in the hypolimnion during  formation
serves  as a reservoir for the remaining stratified season, seasonal changes in
hypolimnion volume (both increases and decreases) are of critical importance to
the seasonal changes in hypolimnion oxygen concentrations.

     The water temperature also has a significant  effect  on  the  hypolimnion
oxygen  budget.   The  temperature during initial hypolimnion formation largely
determines the initial oxygen concentration.  Prior to  the  on-set  of  thermal
stratification,  spring  dissolved  oxygen  concentrations throughout the water
column are generally greater than 1001  saturation.  Hypolimnion  temperatures
continue  to  exert  a physical influence on the concentration  as they increase
through the stratified period.  In addition, the bottom water temperatures  also
effects  the  rate  of  biological metabolic activity (Q10) which is associated
with hypolinmion oxygen  consumption.   Since  the  central  basin  hypolimnion
temperature  is  known  to  increase  as  much  as 10 *C through the stratified
period, temperature is an important factor effecting the depletion of oxygen.

     The concerns about the central basin hypolimnion oxygen do  not  apply   to
the  eastern  basin.   Since  the hypolimnion is generally 4 to 5 times thicker
than the central basin, the eastern basin  oxygen  reservoir  is  significantly
greater.   This,  in  addition to the fact that the eastern basin oxygen demand
rate is one-fifth that of the central basin, explains why oxygen concentrations
do  not  reach  critical levels (< 5.0 mg/1) in the eastern basin.  The eastern
basin hypolimnion thickness and temperature information is being presented  only
for comparison purposes.

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                                                                        PAGE 14
THERMAL STRUCTURE

     CENTRAL BASIN.  The on set of thermal stratification fn the central   basin
was  first  observed  on  May  1st (David Rockwell, personal communication) and
remained stratified through September 21st.   The  observed  stratified  period
spanned  144  days,  approximately  33  days  longer  than  the  average annual
stratified period.  Stable stratification generally is not  established  before
late  May and frequently the central basin destratifies by mid-September.  Thus
the 1985 stratified period was protracted both during the spring and fall.

     A mean hypolimnfon thickness of 8.4 meters was observed during  the  first
survey  (May  15th)  after which the hypolimnion thickness decreased throughout
the remaining season.  One exception was noted between Surveys 3 (July 2) and 4
(July  24)  when  an  increase  of  1.6  meters  occurred.   The basin remained
partially stratified through Survey 7 (September 19 - 21)  but  the  stratified
area  was limited in geographical expanse.  Central basin hypolimnion thickness
data is presented in Table 6  and  Figure  3  and  contours  are  presented  in
Appendix C,

     EASTERN BASIN.  The observed eastern basin stratified period extended from
July  2  through  September 19, an observed period of only 80 days.  The actual
stratified period generally ranges from 145 to 170 days, however,  due  to  the
limited eastern basin survey schedule the observed period was much shorter than
the probable period.

     The mean hypolimnion thickness was observed to be greatest during Survey 3
(July  2)  at  17.8  meters.  The hypolimnion thickness decreased by 3.9 meters
between the early July and early August survey and then increased in  thickness
by  2.8  meters between the early August and mid September survey.  Hypolimnion
thickness data is presented in Table 7 and Figure 4 and contours are  presented
in Appendix C.

TEMPERATURE PATTERNS

     The seasonal temperature pattern characteristic of the central and eastern
basin  is  very similar.  The most striking difference is in the initial spring
warming and the fall cooling cycle.  The shallower central basin  warms  sooner
and  cools  faster  than  the  deeper  eastern basin.  A comparison of the mean
annual epilimnion temperature indicated no significant difference  between  the
two basins.

                        EPILIMNION TEMPERATURE CO

                 CENTRAL BASIN                EASTERN BASIN

N                  225                            57
MEAN                17.82(ST.ERR 1.62)            15.46(ST.ERR 3.32)
MIt                 10.87                          4.42
MAX                 22.27                         21.54
ST.DEV               4.59                          7.42

     No significant difference between these basins at   a = 0.1.

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                                                                        PAGE 15
     In contrast, the  central  and  eastern  basin  hypolitnnions  did  show  a
significant  difference  in  the  mean annual  temperatures as would be expected
from the difference 1n the basin morphologies.

                       HYPOLIHNION TEMPERATURES ("O

                  CENTRAL BASIN               EASTERN BASIN

N                    84                           33
MEAN                 12.68
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                                                                        PAGE  16
     The stability of the thermal  structure varied seasonally.   The  difference
between  mean  epllimnlon (Te)  and mean hypolimnion temperatures (Th)  Indicates
the durability of stratification.    This  simplification   of  stratified   layer
stability  Is  based  on  the  fact  that density  Is temperature dependent.   To
determine precise stability values It Is necessary to calculate the  difference
In  density  resulting  from  the   different temperatures  1n the eplllmnion  and
hypollmnion.  The calculation of stability must also Include sounding depth  and
thermocllne   depth  according   to  Schmidt's  formula  for  the  stability   of
stratification (Ruttner, 1963). The simplified determination of stratification
stability 1s as follows:
         SURVEY
            1
            2
            3
            4
            5
            5
            7
SURVEY MID POINT
   May 16
   June 12
   July 3
   July 24
   August 7
   August 28
   September 20
(Te - Th)
  CO

   3.2
   5.6
   6.7
   8.1
   7.9
   6.8
   3.6
The most stable thermal stratification occurred during Survey 4
5 (early August).
                                        [late July}  and
     EASTERN BASIN.  The epllimnlon wanned between Surveys 3  (July  35   and  5
(August  7!  and  exhibited  slight  cooling between Surveys 5 (August 7) and 7
(September 20):
           SURVEY INTERVAL

           July 3 - August 7
           August 7-September 20
            TEMPERATURE

               3.4
             - 1.1
     DAYS

      36
      45
TEMP/DAY

 + 0.09
 - 0.02
The warming of the epIUmnlon occurred at a much slower rate (+ 0.09 C/day)  1n
the  eastern  basin than In the central basin (+ 0.15 to + 0.20 C/day)  (Figure
7).

     The mesolimnlon and the hypolimnion both  warmed  consistently  throughout
the  season.   The  mesollmnlon  warmed  from  10.1  *C  to  13.8  C while the
hypollmnion increased from 4.7 "C (July 3) to 6.0  *C  (September  20th).    The
measured hypolimnion temperature increase (Figure 8) was 1.3 'C or 13,1% of the
observed central basin increase (9.9 *C).  The warming of 1.3 C  over  the  80
day  observed  stratified  period  represents  a  daily  hypolimnion warming of
0.01625 "C.

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                                                                        PAGE 17
     The stability of eastern basin  stratification  also  varied  through  the
season  as  was  noted  for the central  basin.   The difference between the mean
epilimnlon (Te) and the mean hypolimnion temperature (Th) is as follows:


          SURVEY      SURVEY MID POINT        (Te - Th)
                                                CO

             3           July 3                 13.5
             5           August 7               16.4
             "*           September 20           14.5


Using this criteria to demonstrate stability, the eastern basin thermal   regime
is  2  times  more  stable  than the central basin.  The combination of a thick
hypolimnion water miss and the stability of the temperature  differential  help
explain the longer duration of eastern basin stratification.


DISSOLVED OXYGEN

     The surface waters of Lake Erie remain well oxygenated throughout the year
with  very  little difference evident between basins.  A comparison of the mean
annual epilimnion dissolved oxygen concentrations indicated that there  was  no
significant difference between the basins.  When differences do appear they can
generally be attributed to temperature or photosynthetic production.


             EPILINNION DISSOLVED OXYGEN CONCENTRATIONS (MG/1)

                CENTRAL BASIN                EASTERN BASIN

N                225                             57
MEAN               9.39(ST.ERR 0.56)              9.96(ST.ERR 0.84)
M1N                7.49                           8.23
MAX               12.57                          13.08
ST.DEV             1.57                           1.88

      No significant difference between these basins at   a * 0,1.

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                                                                        PAGE 18
     As would be expected, a significant difference did exist between the  mean
annual  hypollmnion  dissolved oxygen  concentrations for the two basins.   Since
the central basin hypolimnion storage  capacity  and  depletion  rate  are  very
different  from  the  eastern  basin,   the  resulting concentrations would also
greatly differ.

             HYPOLIMNION DISSOLVED OXYGEN CONCENTRATIONS (MG/1)

                CENTRAL BASIN                 EASTERN BASIN

N                  84                             33
MEAN                4,64(ST.ERR 1,60)               9.24(ST.ERR 0.92)
MIN                 0.2                            7.47
MAX                12.11                          10.55
ST.DEV              4.45                           1.59

     There is a significant difference between these basins at   a  = 0.1.
     CENTRAL  BASIN.   The  epllimnion  dissolved  oxygen  (DO)    concentration
decreased  from  12.3  mg/1 (May 16)  to a minimum of 8.3 rag/1  (August 28).  The
decrease in concentration is attributed to decreased solubility   of  oxygen  in
water   as   the  temperature  increases  through  the  summer.    Although  the
concentration decreased 4 rag/1  throughout the season, the 00 did not drop below
93? saturation (Tables 4 and 7).

     The hypolimnion 00 decreased from 11.9 mg/1  on May  16  to   0,33  mg/1  on
August  28  (Figure  9).   Between  August  28th  and  September 20th a partial
destratification of the hypolimnion occurred leaving the remaining  hypolimnion
region  anoxic  (0.1  mg/1).   Unlike  the  epllimnlon,  the  hypolimnion  00 I
saturation decreased continually throughout the stratified  season  reaching  a
median low of 0.5S during the late September survey (Figure 10).

     Dissolved oxygen depletion  rates  (adjusted  for  vertical  mixing)  were
calculated  for each stratified survey interval.   The Adjusced Oxygen Depletion
Rates for the stratified period are as follows:

          SURVEY INTERVAL             DAYS       DAILY RATE      MONTHLY RATE
                                                MG 02/L/DAY      MG 02/L/MO

          MAY 16 - June 12             28          0.150            4.51

          June 12 - July 3             22          0.173            5.19

          July 3 - July 24             22          0,110            3.30

          July 24 - August 7           15          0.184            5.52

          August 7 - August 28         22          0,134            4.02

          August 28 - September 20     24          0.015            0.45

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                                                                        PAGE  19
The 1985 rates presented in Figure 11  Indicated two  major  deviations   from   a
seasonally  uniform  rate.   First, the rate  decreased during the  July interval.
This  is  consistent  with  the  documented   increase  in  hypolimnion   volume,
hypolimnion  area  and  quantity of oxygen over the previous interval.   Second,
the rate for the last stratified interval  decreased dramatically.   Due   to   the
lack of oxygen present in the hypoliranion  during the last interval,  the  rate  at
which oxygen can be lost naturally decreases.

     An additional set of calculations was  prepared  (Corrected   02 Depletion
Rates) that adjusts the depletion rates for  temperature,  hypolironion thickness,
and seasonal variation.  This calculation  procedure was employed   by Rosa  and
Burns  (1986)  when  they  calculated  the  central  basin representative region's
depletion rates for 1929 through 1984  (Figure  12).   Using the 1985  CLEAR   data
base,  Rosa  calculated the annual mean depletion rate applying the corrections
previously mentioned.  The late August to  September rate  was  not  included  in
this  wean  since  it does not represent normal conditions.   The  1985 mean  rate
was 0.124 mg/l/day or 3.73 mg/1/mo. This  rate was  included  in Figure  12   with
rates  calculated over the historcal record.  Clearly, the 1985 rate was one  of
the highest depletion rates calculated in  recent years.   The  reason  for   the
high  1985  rate  is  not  apparent.   It   is   thought that the extremely windy
conditions encountered throughout the  field  season, resulted  in   the  repeated
resuspension  of  oxygen  demanding  sedimented  material  into the hypolimnion
waters, thereby accelerating the 1985  rate.
     The 1985 Corrected 02 Depletion Rates are as follows:
           SURVEY INTERVAL         DAYS


           May 16 - June 12         28

           June 12 - July 3         22

           July 3 - July 24         22

           July 24 - August 7       15

           August 7 - August 28     22
DAILY RATE
MG 02/L/DAY

  0.150

  0.120

  0.093

  0.153

  0.110
MONTHLY RATE
MG 02/L/MQ

   4.50

   3.60

   2,79

   4.59

   3.30
     During the 1983  and  1984  field  season,   oxygen  depletion  rates  were
calculated only for the month of July due to a modified survey plan (Rathke and
Fay 1984).  The adjusted depletion rate calculated for the mid sunnier (July) of
1985  was 0.110 mg/l/day or 3.3 mg/l/mo.  The 1985 rate is slightly higher than
those found in the preceeding two years. 2.92 and 3.16 mg/1/mo (1983  and  1984
respectively),  however it was the lowest 1985 interval rate and well below the
mean rate.  As is evident from Figure 11, the  depletion  rate  changes  during
each  interval  throughout  the  season,  thus using a rate based upon a single
interval, I.e.  July, is not a reliable means  for  tracking  oxygen  depletion
rate trends.

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                                                                        PAGE 20
     EASTERN BASIN.   Typically,  the  eastern  basin  exhibits  an  orthograde
vertical   profile  through  most  of the summer.   As the stratification process
extends into September the hypolimnion  oxygen  concentrations  decrease  to  a
level  below  those  in  the epilimnion however,  never reaching critical levels
{Table 7 and Figure 13).

     SURVEY MID POINT         DISSOLVED OXYGEN CONCENTRATIONS *

                          EPILIMNION   MESOLIMNION     HYPQLIMNION

       July 2                 9.5         10.2            10.4
       August 7               8.8          8.9            10.0
       September 20           8.3          5.6             7.8

                * - Survey 8 Volume Weighted Concentrations

     The epilimnion oxygen concentrator decreased 1.2 mg/1 between July 2  and
September  20th, while the hypolimnion concentration decreased by 2.6 mg/1 over
the same period.  This hypolimnion decrease represents a decline  of  only  25S
compared  with  the  dissolved  oxygen  loss  recorded  for  the  c*ntr
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                                                                        PAGE 21
                           WATER QUALITY PARAMETERS

     Since 1970 the open lake  surveillance/monitoring  program  has  routinely
measured  forms  of  phosphorus  and  nitrogen,  chlorophyll,   pH,   alkalinity,
conductivity, and chloride.  In addition,  dissolved silica and suspended solids
have  also  been  measured but not as routinely,  The information base has been
used to track trends  over  the  period  of  record  as  well   as  aid  in  the
development of ecosystem models.  The following presentation provides a summary
and limited interpretation of the 1985 data base.

NUTRIENTS

     PHOSPHORUS.  Phosphorus concentrations (total, total filtered  and  soluble
reactive)  were  routinely measured on all surveys.  Trends in total phosphorus
concentrations are used to evaluate the success of the  remedial   action  plans
designed  to  reduce  phosphorus  loading to Lake Erie.  Figure 16  presents the
central basin median total phosphorus concentrations through the  field  season.
Seasonal changes are evident for both the epilimnion and the hypolimnion with a
definite upward concentration shift occurring during the end of the  stratified
sea son.

     The fractions comprising total  phosphorus  also  demonstrate   substantial
shifts  during  the  field  year.   Together,  the  total  filtered (dissolved)
fraction and the particulate phosphorus  fraction  comprise  total   phosphorus,
with  each  fraction  contributing  a  variable  percentage.   The relationship
between these two fractions is dependent  upon  the  quantity   of  organic  and
inorganic material suspended in the water column.  Figure 17 shows the seasonal
changes  in  the  central   basin   epilimnion   and   hypolimnion   phosphorus
concentrations  and  percent  contribution  of  the two fractions.   The percent
contribution by the dissolved and particulate fractions shifted back and  forth
through the field season with each form contributing SOS +-10%.

     Total filtered and soluble reactive phosphorous provide information on the
amount   of  phosphorus  most  readily  available  for  biological   processing.
Epilimnion and hypolimnion concentrations remain fairly stable  until  late  in
the  summer  at  which time the* increase and continue to increase through fall
turnover {Survey 7, September 20), (Figure 18).

     The greatest seasonal changes in phosphorus concentration  took  place  in
the  hypolimnion.   Central  basin  hypolimnion  phosphorus concentrations also
remained fairly stable through Survey 5 but due to the  development  of  anoxic
conditions,  the concentrations increased four fold during the interval between
Surveys 5 and 6 (Figures 16 and 18).   This  anoxic  regeneration  of  sediment
bound  phosphorus increased the hyoolimnion total phosphorus concentrations from
23 ug/1 to nearly 100 ug/1 in a twenty  day  period.   As  is  evident  by  the
percent  contribution  of  the dissolved and particulate fractions (Figure 17),
regeneration of the soluble phosphorus dominated the increase in concentration.

     Not  only  did  the  anoxic  regeneration  of  phosphorus  result   in   a
concentration  increase,  but  more  importantly   it  resulted  in doubling the
quantity of total phosphorus found in the entire central basin sampling region.
Between  Surveys i and 6 the metric tons  (MT) of phosphorus increased from 1205
to 2503 (Figure 19, Table 9)  which  weans  an  internal  loading  of  1300  MT

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                                                                        PAGE 22
occurred   during   the   interval.    Considering   that  the  volume  of  the
representative region accounts for approximately 33X of the  central   basin,  a
conservative  estimate  of  the total internal loading to the basin would be at
least 2600 MT.

     By mid-November  {Survey  8),  phosphorus  concentrations  had  reached  a
seasonal  peak.   Since  fall  turnover  was  nearly  complete by Survey 7, the
further increase between Surveys 7 and 8 was due to storm Induced  resuspension
of  unconsolidated  sediments.   Figure  17  shows  the  shift to a particulate
phosphorus  dominated  fraction  during  Survey  7,   The  total  quantity   of
phosphorus  increased to over 2800 MT which was 2,5 times the quantity recorded
during the mid-May Survey (1).

     The eastern  basin  phosphorus  concentrations  followed  a  pattern  more
typical for the Great Lakes (Figure 20).  Concentration differences between the
epilimnion and the hypolimnion for  all  the  phosphorus  forms  measured  were
minimal  (Figures  20  and  21).   During  the  three  stratified  surveys  the
concentrations were fairly uniform (7 to 10 ug/13.  Both  the  first  and  last
surveys (unstratified) also had very similar concentrations (11.7 ug/1 and 11.3
ug/1 respectively) but were  somewhat  higher  than  the  summer  values.   The
percent contribution of the soluble and particulate fractions were close to 501
+_ 10S for both limnions.  Only during Survey 5  (August  7)  did  this  pattern
deviate  when particulate phosphorus increased to 80* of the total.  This trend
is supported by the volatile solids fraction comprising 70% of the total solids
(Figure 22).

     Annual  mean  epilimnion  total  phosphorus  concentrations   indicate   a
significant difference between the central and eastern basins.  Due to the near
proximity ci the central basin to the major external phosphorus loading sources
and  the  pronounced sediment interactions characteristic of the basin, central
basin concentrations would be expected to be greater than the eastern basin.

            EPILIMNION TOTAL PHOSPHOROUS CONCENTRATIONS (UG/L)

              CENTRAL BASIN                 EASTERN BASIN

N                217                            54
MEAN              12.63{ST.ERR 0.39)            10.15(ST.ERR 0.41)
MIN                3.8                          6.4
MAX               34.5                         22.4
ST.DEV             5.85                         3.03

      There is a significant difference between these basins at o   0,1.

     Hypolimnion concentration were also found to be significantly  greater  in
the  central  basin  than  the  eastern.  This was primarily lue to the central
basin anoxic phosphorus regeneration which occurred during the  latter  portion
of the stratified period.

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                                                                        PAGE 23
           HYPQLIMNION TOTAL PHOSPHORUS CONCENTRATIONS (UG/L)

            CENTRAL BASIN                   EASTERN BASIN

N               81                              22
MEAN            34.4(ST,ERR 6.55)                9,62(ST.ERR 0.37)
MIH              4.9                             6.2
MAX            316.0                            12.6
ST.DEY          58,97                            1.74

     There is a significant difference between these basins at a  = 0.1.

     NITROGEN.  Three forms of nitrogen were measured  during  the  1985  field
season;   nitrate plus nitrite, ammonia and total kjeldahl  nitrogen.  The total
kjeldahl nitrogen data reported represents  total  dissolved  organic  nitrogen
plus  dissolved  ammonia.   Both  nitrate  plus  nitrite  and ammonia have been
measured routinely since 1970.  Kjeldahl nitrogen has  been  less  consistently
measured over this period.

     As with phosphorus, the rationale for the measurement of nitrogen forms is
to  enable  the  development of trend data and for the calibration of ecosystem
models.  Unlike phosphorus, sources of nitrogen in the  lake  include  a  large
atmospheric  contribution  as well as agricultural and municipal.  This coupled
with the numerous biological and chemical transformations associated  with  the
forms make nitrogen a very difficult nutrient to quantify.

     Central basin nitrate plus nitrite, ammonia and  total  kjeldahl  nitrogen
all  indicated significant concentration differences between the epilimnion and
hypolimnion.  Seasonal fluctuations were also evident for each of the  nitrogen
forms.   In  general,  the  epilimnion concentrations were most stable, showing
only modest changes through the field season.  This was  most  clearly  evident
with  the  ammonia nitrogen data, having a mean concentration of 7.4 ug/1 + 3,9
ug/1 for the season.  Since ammonia is considered to be the preferred  nitrogen
form for phytoplankton,  these low concentrations would be expected.  Epilimnion
nitrate plus nitrite concentration were also uniform until  mid-September  when
the  concentration  decreased.   This  decline coincided with a doubling of the
chlorophyll concentrations, indicating possible biological uptake.   Epilimnion
kjeldahl nitrogen concentrations were more erratic than ammonia or nitrate plus
nitrite, possibly reflecting changes in the plankton populations  (Figure 23).

     Hypolimnion concentrations of ammonia and nitrate plus nitrite  indicated a
gradual  increase through Survey 5.  Between Surveys 5 {August 7) and 6 (August
28) oxygen concentrations decreased sufficiently to create reducing  conditions
in  the  hypoliBmion  which  persisted  through  the remaining stratified period
(Survey 7, September 20).  As a result,  nitrate  plus  nitrite  concentrations
were  reduced  to  detection  limits  while ammonia concentrations were greatly
increased due to regeneration from the sediments.  During this same  period  the
kjeldahl  nitrogen concentrations increased to peak levels.  An actual increase
in organic nitrogen was  Indicated between Surveys 5 and 6, but a  decrease  was
evident from Surveys 6  to 7 (Figure 23).

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                                                                        PAGE 24
     The forms of nitrogen measured in the eastern basin epillmnlon were  found
to  have  similar  seasonal  patterns  as  were described for the central  basin
(Figure 24).   Ammonia  concentrations  remained  close  to  detection  limits,
nitrate  plus  nitrite  were  steady  following  a  spring maximum and kjeldahl
nitrogen peaked with chlorophyll.  Since the eastern basin hypolimnion  remains
well  oxygenated  throughout the summer and reducing conditions do not develop,
the forms of nitrogen measured in the hypolimnion do not fluctuate as  was  the
case for the central basin hypolimnion.

     The annual mean epilimnion concentrations  of  nitrate  plus  nitrite  and
ammonia were not significantly different for the two basins.

           EPILIMNION NITRATE PLUS NITRITE CONCENTRATIONS (UG/L)

            CENTRAL BASIN                      EASTERN 8ASIN

N                222                              57
MEAN             185.95(ST.ERR 18.5)             210.22(ST.ERR 20.94)
MIN              121.5                           174.3
MAX              283.4                           288.0
ST.DEV            52.31                           46.83

     No significant difference between these basins at  o * 0.1.


           EPILIMNION AMMONIA CONCENTRATIONS (UG/1)

            CENTRAL BASIN                     EASTERN BASIN

N                200                             57
MEAN              10.2(ST,ERR 2.29)               6.72?ST.ERR 2.13)
MIN                2.10                           2.00
MAX               21.33                          14,7
ST.OEV             6.48                           4.78

     No significant difference between these basins at   a* 0.1.


In contrast, the annual  hypolimnion  mean  concentrations  wer<  significantly
different  for  the  two basins.  The concentration differences between the two
basins were due to the anoxic conditions which developed in the central  basin.
As  was  previously  discussed,  central  basin nitrate plus nitrite levels are
reduced nearly  to the detection limit  while  ammonia  concentrations  increase
dramatically.

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                                                                        PAGE  25
           HYPOLINNION NITRATE PLUS NITRITE CONCENTRATIONS (UG/l)

               CENTRAL BASIN                  EASTERN BASIN

N                  81                             33
MEAN              178.4KST.ERR 38.76S            346.8(ST.ERR 15.4)
MIN                 2.5                          319.5
MAX               262,6                          372.8
ST.DEV            102.55                          26.6?

      There 1s a significant difference between these basins at o   0.1.


                 HYPOLIMNION AMMONIA CONCENTRATIONS (UG/L)

               CENTRAL BASIN                  EASTERN BASIN

N                   82                            33
MEAN                62.3KST.ERR 29.62)            8.50CST.ERR 0.21)
MIN                  6.7                           8.1
MAX                228.3                           8.80
ST.DEV              78.37                          0.36

       There is a significant difference between these basins at a  = 0.1,
     DISSOLVED SILICA.  Dissolved silica serves as an  important  nutrient  for
diatom  populations  in  Lake  Erie.   Diatoms  contribute  up  to  SOS  of the
phytoplankton biomass during much of the year {Munawar and Munawar, 1970), with
the  major  population  base  present  during the spring and fall.  In both the
central and eastern basins the concentrations measured in the  epilimnion  were
consistently  below  500  ug/1,   indicating  a  depletion  and continual demand
through the field season  (Figures  25  and  26).   Hypolimnion  concentrations
showed a marked increase through the stratified period.  The increase noted for
the first four central basin surveys and the entire eastern  basin  season  was
due  primarily  to  dissolution  of  diatom frustults.  The rapid concentration
increase  evident  through  August  and  September  was  a  result  of   anoxic
regeneration  from  the  sediments.   An Increase in the water column dissolved
silica concentration was expected following turnover  (Survey  8),  however  no
increase  was  evident.  During Survey 7 (September 20) there was approximately
55,000 metric tons (MT) of dissolved silica in  the  entire  water  column  and
approximately  44,000  MT  during  Survey  8  (November  19).   Over the survey
interval (7 to 8) 10,000 MT were lost from the system, which is  attributed  to
biological uptake.

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                                                                        PAGE  26
     As was evident with both phosphorus and nitrogen,  mean  annual   epilimnion
concentrations  of  dissolved  silica  show  no  significant difference  between
basins.

             EPILIMNION SOLUBLE SILICA CONCENTRATIONS (UG/L)

              CENTRAL BASIN                   EASTERN BASIN
N
MEAN
M1N
MAX
ST.DEV
   219
   376.29(ST.ERR 70.93)
   120.30
   819.00
   200.62
    57
  326.86(ST.ERR 62.56)
   219.80
   555.8
   139.89
      No significant difference between these basins at   o = 0.1.

Mean annual hypolimnion concentrations were significantly different.    As  with
the  other  nutrients  discussed,  the  central  basin concentrations increased
substantially during the anoxic period.
              HYPOLIMNION SOLUBLE SILICA CONCENTRATIONS SUG/L)
N
MEAN
MIN
MAX
ST.OEV
CENTRAL BASIN

     81
   2246.49(ST.ERR 670.78!
    320.7
   4740.8
   1774.71
EASTERN BASIN

   33
  733.40(ST.ERR 133.11)
  553.2
  993.2
  230.55
     There is a significant difference between these basins at  a = 0.1.
     ANOXIC REGENERATION  OF  NUTRIENTS.   The  first  documented  accounts  of
extensive  oxygen  depletion  of  the central basin hypolimnion were during the
late 1950's and early 1960's however, anoxic conditions  likely  existed  many
years  before  (Rathke 1984).  Due to the shallow nature of the basin, the mean
annual hypolimnion thickness is rarely  over  five  meters  and  is  frequently
closer  to  three.   As  a  result,  the  reservoir  of oxygen contained in the
hypolimnion is not  sufficient  to  supply  the  demand  encountered  over  the
stratified  period.   Consequently,  by  the  latter  portion of the stratified
period (mid to late August) the oxygen reservoir has been depleted.

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                                                                        PAGE 27
     Two Important consequences result from the central  basin becoming  anoxic.
First,  an  extensive  benthic  region  Is  made  uninhabitable  for  organisms
requiring oxygen levels greater than 2 mg/1.  This  is  particularly  important
for  oxygen  dependent  benthic  organisms  having  a  life cycle that would be
interrupted and/or eliminated by anoxic conditions.    This  in  turn  adversely
effects  other  organisms such as bottom feeding fish.  Second, the development
of  reducing  conditions  (0.0  mg/1  dissolved  oxygen)  results  in  a   very
significant   pulse   of  nutrients  being  released  from  the  sediments  and
interstitial waters.  Figures 27 and 28 illustrate  the   dramatic  Increase  in
concentrations  of  phosphorus,  silica and ammonia  once the oxygen levels have
been depleted.  The critical issue involves the increased internal   loading  of
these  primary nutrients.  The exception to this should  be pointed  out, nitrate
+ nitrite concentrations reach levels below detection limits during  this  time
due to the reducing conditions.

     Thus, once fall turnover  has  taken  place  these   nutrients   freely  mix
throughout  the  water  column  and become available to  the plankton community.
For example, between the first survey in May and  the  fifth  survey  in  early
August  concentrations  and  quantities  of  total  phosphorus  and chlorophyll
changed only slightly but following turnover {survey 7)  a dramatic  increase was
evident.
DATE
MAY
SURVEY
  1
         WHOLE WATER COLUMN
AUGUST     5
(EARLY)

AUGUST     6
(LATE)

SEPTEMBER  7
TOTAL PHOSPHORUS
 (UG/L) (MT)

  10.0 (1128)

  10.2 (1205)


  22.4 (2503)


  19.5 (2169)
CHLOROPHYLL
(UG/L) (MT)

 2.3 (254)

 2.8 (316)


 2.4 (269)


 5.9 (655)
  HYPQLIMNION

DISSOLVED OXYGEN
    (MG/L)

     11.9

      1.8


      0.2


      3.6
     As is indicated by this  table,  a  substantial  increase  in  chlorophyll
results  from  the  mixing  of  previously  sediment  bound  nutrients  (anoxic
regeneration) into the overlying water column during the  fall.   This  process
aids  in  replenishing the supply of oxygen demanding organic material, further
contributing to the central basin oxygen depletion problem.  The anoxia induced
internal  loading  cycle  will  be  interrupted only if the measures to further
reduce external nutrient sources are successful.

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                                                                        PAGE  28
PARTICULATES

     In order to determine the quantity of participate  material   suspended   in
the  water  column,  measurements  of  total  suspended solids,  residual  solids,
volatile solids and chlorophyll  were  measured  at  all   stations   and  depths.
Information  from  total  suspended  solids  can  be  divided  into the  organic
fraction (volatile solids)  and  inorganic  fraction  (residual   solids).    The
chlorophyll  values  reported are corrected chlorophyll  or chlorophyll which is
reported to be photosynthetically active.

     CORRECTED CHLOROPHYLL A.  Central and eastern basin epilimnion chlorophyll
concentrations   indicated   a   somewhat   different   seasonal    pattern   and
concentration range (Figures 29 and 30).   Central  basin  concentrations declined
following  the  spring peak, reaching minimum levels by  mid summer.  During  the
late summer and fall the highest concentrations attained were  associated  with
fall  turnover.   In  contrast,  eastern  basin  concentrations showed a steady
increase through the summer with peak values  developing  during  the fall.

     The  mean  annual  epilimnion  central  basin  chlorophyll    levels  were
significantly  higher  than  those  measured   for  the  eastern   basin.   Higher
concentrations were evident throughout the year but most dramatically different
during the last two fall surveys.

                EPILIMNION CHLOROPHYLL CONCENTRATIONS (UG/L)

              CENTRAL BASIN                 EASTERN BASIN

N                 223                           56
MEAN                3.62(ST.ERR 1.07)            1.29(ST.ERR 0.16)
MIN                 1.18                         0.89
MAX                 7.24                         1.81
ST.DEV              2.39                         0.35

      There is a significant difference between these basins at a= 0.1.

In both basins the hypolimnion is either below the photic zone  or   very   close,
so that minimal primary production is associated with this region.


     SUSPENDED SOLIDS.  Total suspended solids show similar  seasonal  patterns
in   the   epilimnion   waters  of  the  two  basins,  however,   eastern  basin
concentrations were somewhat lower.  In  general,  concentrations   are  highest
during  unstratified  periods  (spring and fall) while summer values are lowest
(Figures 29 and 30).  The composition of  organic  versus  inorganic  fractions
also  changes  with  the  season  (Figures  31 and 32).   Due to resuspension of
unconsolidated sediments during the spring and fall, residual solids  comprised
the  major  portion  {>  70t)  of  the  total solids.  In contrast, the  organic
fraction contributes a higher percentage  (>   70S)  during  the  summer   months
(stratified period).

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                                                                        PAGE 29
     The concentration of paniculate material  suspended in the hypolimnion  is
primarily  affected  by  two processes,  settling and resuspension.   The flux of
material settling through the overlying   water   column  provides  a  continuous
supply  of  participate  material   to the hypolimnion and during the stratified
summer months detritus comprises a significant  portion.  In addition, an upward
flux  of  unconsolidated  material  from the sediment water interface can occur
during severe storm periods.  This process is more common in the central  basin
due  to  the  shallow depth of the basin and the resulting shallow thickness of
the hypolimnion.  The result is a higher percentage of inorganic material found
suspended  in the hypolimnion than is generally found in the epilimnion (Figure
31).

         EPIL1MHIOH TOTAL SUSPENDED SOLIDS CONCENTRATIONS (MG/L)

             CENTRAL BASIN                   EASTERN BASIN

N                215                             56
MEAN               1.1Q(ST.ERR 0.23)              1.44(ST.ERR 0.49)
M!N                0.70                           0.56
MAX                1.64                           3.23
ST.OEV             0.46                           1.11

      No significant difference between  these basins at  o  = 0.1.

           HYPOLIMNION TOTAL SUSPENDED SOLIDS CONCENTRATIONS (MG/L)

                CENTRAL BASIN                  EASTERN BASIN

H                   81                             34
MEAN                 2.55(ST.ERR 0.17)              2.09(ST.ERR 0.19)
MIN                  2.22                           1.72
MAX                  3.14                           2.37
ST.DEV               0.39                           0.33

      No significant difference between these basins at a  = 0.1.

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                                                                        PAGE 30
PRINCIPAL IONS


Both conductivity (umhos) and chloride (mg/1)  concentrations were  measured  at
all  stations and sampling depths throughout the field season.  Conductivity is
a measure of the total ionic strength with each of the major ions  contributing
proportionately.   In  Lake  Erie  the system Is dominated by the carbonate ion
contributing over 50$, while chloride accounts for approximately  12%  (Rathke,
1984).
     CONDUCTIVITY.  Conductivity values for the central  basin ranged  from  251
to  288,  having a median of 269.  Values between 264 and 271 accounted for 58%
of the data recorded.  Epilimnion values Indicated an increase following Survey
1 (Hay 16) and remained fairly stable through *:he remainder of the field season
(Figure 33).  The hypolimnion values  showed  a  steady   increase  through  the
entire  stratified  period.   Maximum  values  were  reached  during  the  last
stratified survey (7) when the hypolimnion  was  anoxic   and  a  free  exchange
between the sediments and overlying waters existed.

     Eastern basin conductivity ranged from 257 to 289 with a median  value  of
274.5  umhos.   The  values  between  270 and 280 accounted for 63Z of the data
base.  A similar seasonal trend was apparent for the epHimnion and hypolimnion
in  the eastern basin as was observed for the central basin {Figure 34).  Since
the eastern basin remaind oxic throughout the stratified period increases  were
attributed to normal processes.

     The following table provides a detailed summary of  the data  for  the  two
basins and Tables 4 and 5 show the individual survey results.


                  CENTRAL BASIN                  EASTERN BASIN

N                      313                           106
MEAN                   269.3 (ST.ERR. 0.34)          274.4 (ST.ERR. 0.61)
MEDIAN                 269.0 (ST.ERR 0.29)           274.5 (ST.ERR. 0.87)
MAXIMUM                288.0                         289.0
MINIMUM                251.0                         257.0
RANGE                   37.0                          32.0
ST. OEV.                 6.4                           6.3
25S                    266.0                         271.0
75X                    273.0                         279.0

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                                                                        PAGE 31
Nhen the annual means for the epilimnion  and  hypolimnion  were  examined  for
differences  between  the  basins,  no statistically significant difference was
determined.

                    EPILIMNION CONDUCTIVITY (umhos)

            CENTRAL BASIN                   EASTERN BASIN

N               225                              57
MEAN            266.96{ST.ERR 1.11)             270.9KST.ERR 1.91)
MIN             263.25                          263.25
MAX             269.40                          274.83
ST.OEV            2.48                            4.28

     No significant difference between these methods at  o  " O.I.

                    HYPOLIMNION CONDUCTIVITY (umhos)

           CENTRAL BASIN                   EASTERN BASIN

N                84                            33
MEAN            274.99(ST.ERR 3.60)           279.76(ST.ERR 1.70)
MIN             265.40                        277.09
MAX             282.83                        282.91
ST.DEV            7.20                          2.94

      No significant difference between these basins at  a  =0.1.


     CHLORIDE.  Chloride concentrations were  very  stable  through  the  field
season  showing  a  slight  increase  (0.5  mg/1)  in both basins from Survey 1
through 7  {Figures 33 and 34 and Tables 4 and 5).  Considering that the eastern
basin  has  a  slightly higher conductivity than the central basin, a difference
in chloride concentration may have been expected.  The following table provides
a comparison between the two basins and no concentration difference is evident.

                   CENTRAL BASIN              EASTERN BASIN

N                     312                       106
MEAN                   15,0 (ST.ERR 0.04)        15.3 (ST.ERR. 0.11)
MEDIAN                 15.0 (ST.ERR. 0.02)       15.0 (ST.ERR. 0.00)
MAXIMUM                20.0                      20.0
MINIMUM                13.5                      14.4
RANGE                   6.5                        5.6
ST. OEV                 0.7                        1.1
25*                    14.7                      14.8
75X                    15.3                      15.3

No significant difference in the annual mean concentration was apparent between
the basins for either the epillmnion or the hypoliwnion.

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                                                                        PAGE 32
                  EPILIMNION CHLORIDE CONCENTRATION (MG/L)
N
MEAN
WIN
MAX
ST.OEV
CENTRAL BASIN

   225
    15.02(ST.ERR 0.18)
    14.6
    15.6
     0.39
EASTERN BASIN

     5?
     15.22(ST.ERR 0.30)
     15.6
     16.4
      0.67
     No significant difference between these basins at a  = 0.1.

                  HYPOLIMNION CHLORIDE CONCENTRATION (MG/L)
N
MEAN
MIN
MAX
ST.OEV
CENTRAL BASIN

     84
EASTERN BASIN

     33
     14.83(ST.ERR 0.19)
     14.3
     15.2
      0.39
     15.30CST.E8R 0.30)
     15.0
     15.9
      0.52
     No significant difference between these basins at  a  =0.1.
     TOTAL  ALKALINITY.   Central  and  eastern  basin  values  were   examined
separately,  with  no  significant  difference  apparent.   The following table
presents the data summary and Tables 4 and  5  provide  the  individual  survey
results.
N
MEAN
MEDIAN
MAXIMUM
MINIMUM
RANGE
ST. DEV
25S
75%
               CENTRAL BASIN
313
95.7 (ST. ERR.
96.5 (ST. ERR.
111.6
90.4
21.2
8.4
94.7
0.47)
0.17S
                             EASTERN BASIN
106
97.6 (ST. ERR.
97.4 (ST. ERR.
103.6
93.1
10.5
2.5
95.7
0.24)
0.26)
      97.5
     98.6

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                                                                        PAGE  33
In addition, no significant difference was found between the annual  mean  values
for either the epilimnion or hypollmnfon.


                       EPILIMNION ALKALINITY (MG/L)

                CENTRAL BASIN                EASTERN BASIN

N                 225                           56
MEAN               95.49(ST.ERR 1.30)           97.25(ST.ERR 1.27}
MIN                90.91                        95.17
MAX                98.48                       102.13
ST.DEV              2.90                         2.83

      No significant difference between these basins at a * 0.1.

                      HYPOLIMNION ALKALINITY (MG/L)

                CENTRAL BASIN                EASTERN BASIN

N                   84                           33
MEAN                95.68(ST.ERR 5.08)           98.25(ST.ERR 0.66)
MIN                 83.22                        97.07
MAX                108.10                        99.34
ST.DEV              10.16                         1.14

      No significant difference between these basins at  a  0.1.


     pH,  pH values are determined on a routine basi  during all  surveys.    pH
data  was  examined  for  the  central  and  eastern basins separately, with no
significant differences.  The following table presents  the  data  summary   and
Tables 4 and 5 provide the individual survey results.

                CENTRAL 8ASIN               EASTERN  BASIN

N                  313                         106
MEAN                 8.1 (ST.ERR. 0.02)          7.9 (ST.ERR. 0.03)
MEDIAN               8.2 (ST.ERR. 0.02)          7.9 (ST.ERR. 0.02)
MAXIMUM              8.9                         8.5
MINIMUM              7.0                         7.3
RANGE                1.8                         1.2
ST.OEV               0.4                         0.3
25t                  7.9                         7.7
75X                  8.4                         8.3

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                                                                        PAGE 34
In addition, no significant difference was found between the annual mean values
for either the epilimnion or hypolimn ion.

                               EPILIMNIQN pH

                 CENTRAL BASIN               EASTERN BASIN

N                  225                         56
MEAN                 8.25(ST.ERR 0.06)          8.20(ST,ERR 0.13)
MIN                  8,02                       7.89
MAX                  8,35                       8.48
ST.OEV               0.14                       0,29

       Mo significant difference between these methods at a = 0.1.

                             HYPOLIMNIQN pH

                  CENTRAL BASIN              EASTERN BASIN

N                   84                         33
MEAN                 7.S2(ST.ERR 0.17)          7.67(ST.ERR 0.07)
MIN                  7.21                       7.56
MAX                  8.00                       7.79
ST.DEV               0.35                       0.12

       No significant difference between these basins at  a = 0.1.

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                                                                        PAGE 35
                               BASIN COMPARISON

     Throughout the  physical   data  and  water  quality  parameters  sections.
comparisons  between the central  and eastern annual mean values were presented.
Epilimnlon comparisons only indicated a significant difference  between  basins
for  total phosphorus and chlorophyll.  In both cases, the central  basin values
were found to be greater than  the eastern.

     In order to better understand the similarities and dissimilarities of  the
basins, a comparison was made  on a survey by survey basis using variables known
to show strong seasonality.


                   LAKE ERIE EPI LIMN I ON - BASIN COMPARISON
Parameter   SURVEY 1      SURVEY 3      SURVEY 5      SURVEY 7      SURVEY 8
            CB    EB      CB    EB      CB    EB      CB    EB      CB    EB

TEMPERATURE
     X     11.0   4.7    19.2  20.7    22.1  21.6    21.4   20.6   12.3  11.5
     t       -15.99         2.59         -7.24          -5.86        -5.40
Result          >            *              >              >            >

TOTAL SUSPENDED SOLIDS
     X      1.4   2.4     0.6   0.6     0.8    0.6    1.6    1.0    3.7   1.3
     t        4.47          0.10          -1.53         -2.71        -4.22
Result          <             *             >               >           >

CORRECTED CHLOROPHYLL
     X      1.9   1.3     1.2   0.6     2.9     1.4   5.8     1.9   4.5   1.2
     t        -1.44        -1.33          -3.73         -8.53        -10.11
Result                                      >               >           >

TOTAL PHOSPHORUS
     X     10.2   12.9    7.2  10.2    10.3     8.9   16.3   8.5   21.5   10.9
     t        2.39          2.27          -1.47          -5.66        -7.09
Result          =             =             =               >           >
COMPARISON BASED ON TWO-TAILED T-TEST WITH   a  0.05
    X = MEAN          t = t STATISTIC
    > - SIGNIFICANTLY GREATER.
    < - SIGNIFICANTLY LESS.
    = - NOT SIGNIFICANTLY DIFFERENT.

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                                                                        PAGE 36
     Temperature Indicated a strong basin difference during  the  first  survey
and  showed a statistically significant difference during the last two surveys.
Even though temperature was reported to be statistically different for the last
surveys,  from  a  limnological  perspective  these  basin differences could be
considered not to be significantly different.   The  remaining  parameters  all
indicated  significant basin differences during the late summer and early fall.
This result  would  be  expected  considering  the  effect  turnover  and  fall
resuspension have on the central basin.


                          OPEN LAKE SAMPLING REGIONS

     The station pattern for both the central and eastern basins was based upon
studies carried out by F.  Rosa and A.  El-Sharrawi (CCIW-NWRI),  These studies
were reviewed by the Lake Erie  Task  Force  (IJC)  and  the  current  sampling
program  resulted.   The  central  and  eastern  basin  sampling  regions  were
recommended because these regions were shown to represent the open  lake  water
quality of the respective basin.

     Since  1985  was  the  first  year  for  the  Implementation  of  the  new
surveillance  plan,  it  was  deemed  necessary  to test the variability of the
stations within each basin.  The null hypothesis was that  individual  stations
within  the  oasin would have equal means for each of the variables tested.  An
analysis of variance was used to examine  each  basin  data  set.   Temperature
(TEMP),  total  suspended solids (TSS), corrected chlorophyll (CHLACORR), total
phosphorus  (CORRTP),  and  nitrate  +  nitrite  (NITNIT)  were  the  variables
examined.

     Results from the central basin and  eastern  basin  analysis  showed  that
there were no significant differences between individual station means within a
basin as compared with the overall mean  for  the  representative  region  {a 
0.05).   The following table shows the means and standard deviations calculated
for the representative regions  {all stations and epiliiirion depths included):
  THE EPILIMNION MEANS AND STANDARD DEVIATIONS FOR THE CENTRAL (N
                     AND EASTERN BASIN REGIONS (N = 57)
             TEMP

CENTRAL BASIN
MEAN         18.3
ST. 0V.       4.2

EASTERN BASIN
MEAN         14.9
ST.DV.        6.9
TSS
1.3
1.4
1.2
0.9
CHLACORR
  2.9
  1.9
  1.3
  0.5
CORRTP
 12.4
  6.1
  9.5
  3.9
                                           221)
NITNIT
 182,6
  80.5
 213.2
  45.5

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                                                                        PAGE 37
The following table shows the maximum range of the mean and standard  deviation
calculated  for each of the ten stations comprising the central basin data base
and the four stations comprising the eastern basin data base:
               RANGE OF STATION MEANS AND STANDARD DEVIATIONS FOR
                        THE CENTRAL BASIN (N * 20 TO 23)
                    AMD EASTERN BASIN STATIONS (N  14 TO 15)
            TEMP

CENTRAL BASIN

MEAN    17.9 - 18.6
ST.DV.   4,1 -  4.5

EASTERN BASIN

MEAN    14.2 - 15.3
ST.DV    6.7 -  7.3
   TSS
0.8 - 1.8
0.4 - 2.4
1.1 - 1.4
0.5 - 1.4
CHLACORR
2.2 - 3.4
1.4 - 2.9
1.1 - 1.4
0.4 - 0.7
   CORRTP
10.3 - 14.2
 3.2 -  8.1
  8.7 - 10.9
  2.2 -  5.9
    NITNIT
148.5 - 230.5
 30.2 - 109.4
 207.3 - 223.5
  42.6 -  52.1
Tables 10 and 11 present the individual station means plotted cgainst the means
and  standard  deviations  for the representative area.  The individual station
means did not exceed + 1 standard deviation of the area mean in  either  basin.
In  fact,  in  only  one  case  (NITNIT)  at  central  basin station 43 did the
individual mean exceed *; 0.5 standard deviation of the  area  mean.   The  fact
that  the  individual  station means {for all variables) were not significantly
different from the area means, indicated the central and eastern basin sampling
program provides a uniform picture of the open lake epilimnion waters.

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                                                                        PAGE 38
                            TROPHIC CLASSIFICATION
     Reviews of the numerous trophic classifications and trophic indlcies  have
been  prepared  by  Rawson  (1956), Zafar (1959), Dobson (1976) Carlson (1977),
Rast and Lee (19785, Gregor and Rast (1979}, Naloney (1979), and  Steinhart  et
al, (1981).

     Dobson1s index was selected for presentation because it  was  designed  to
evaluate Great Lakes offshore summer trophic conditions.  Summer condition were
defined based on the disappearance of the thermal bar.   The summer  period  for
central  Lake  Erie  is  considered  to  extend  from June 15 to September 5th.
Oobson did not determine specific dates for the eastern basin however since the
basin  resembles the deeper Great Lakes, a similar summer period was used.  The
eastern basin summer period would include  July,  August  and  September.   The
Oobson  index  uses  summer  mean  secchi  reciprocals,  total  chlorophyll  a,
participate organic carbon and total phosphorus, from the offshore near-surface
waters.   To  calculate the summer mean values, the individual survey means are
plotted.  The summer mean is then calculated by using values interpolated  from
the graph on a 10 day interval.  These interpolated values are then averaged to
determine the summer mean.  Dobson's 1976 trophic index is as follows:
OLIGOTROPHIC

MESOTROPHIC

EUTROPHIC

HYPEREUTROPHIC
                   SECCHI
                 RECIPROCALS
30/SD (m)

 0-5

 5-10

10 - 30

  > 30
                 TOTAL
              CHLOROPHYLL
      ug/1

     0 - 2.5

   2.5 - 5.0

   5.0 - 15.0

      > 15

SO = SECCHI DEPTH
PARTICIPATE
  ORGANIC
  CARBON

   ug/1

  0 - 250

250 - 500

500 - 1500

  > 1500
                                     TOTAL
                                   PHOSPHORUS
  ug/1

 0-9

 9-18

18 - 50

  > 50

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                                                                        PAGE  39
     The 1985 summer results  for  the  offshore  near-surface  waters  of  tl
-------
                                                                        PAGE  40
                            QUALITY CONTROL SUNMARV
     During each day of a survey,  wate  *as collected  to be  used   for   quality
control  samples.   Two terms are  used to describe the types of quality  control
sample being examined.   First, replicate water samples  are  collected   as   two
separate  samples  (XI   and  X2)   taken  from  the  same  selected   depth.   The
submersible pump is lowered to the designated depth for  XI  and then   lowered
again for X2.  Second,  splits or  two sub-samples of each replicate  are prepared
for analysis.
                       XI <	Replicates	>  X2

                           \             ^
              Xll <--$p1its> X12       X21  X22
     The quality control program determines the PRECISION and ACCURACY   of   the
analytical methods employed.  Precision is a measurement of the agreement among
duplicate  analysis.   The  standard  deviation  of  the   difference    between
replicates   or   the   difference  between  splits  represents  the   precision
(uncertainty) of the  method.    Standard  deviations  are  estimated   for  each
analytical  method  by  summing  the  differences  between  duplicate  analysis,
calculating the mean and dividing by 1.128.  An acceptable limit for  the range
of  differences  is  determined  by multiplying the standard deviation  by 3.686
(Clark, 1981).

     The 1985 results are presented in Table 10.  The range limit of 40.46  ug/1
for  soluble  silica  seems high when compared to the range limits of  the other
parameters.  However, the silica range limit is acceptable because the  smallest
increment  on  che  Auto  Analyzer chart paper is SO ug/1.  All parameters  have
greater than 881 of the  quality  control  samples  within  the  range   limits.
Almost  half  of the parameters have greater than 95S of the samples within the
range limits.  Appendix D contains the BMDP statistical   computer  outputs   for
each parameter.

     Auto Analyzer quality control checks are performed   repeatedly  throughout
the  sampling  period.   Fresh  standards are used in a  daily linearity series.
Standards near the sample concentrations are run before  and after  a   group  of
samples  (nlC) as a concentration check.  In addition,  at each quality control
station a distilled water sample is run as a blank for ill  Auto  Analyzer   and
suspended solid parameters.

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                                                                        PAGE 41
                              1985 BLANK VALUES
          PARAMETER
     Total  Phosphorus
     Total  Filtered Phosphorus
     Soluble Reactive Phosphorus
     Nitrate + Nitrite
     Ammonia
     Soluble Reactive Silica
     Chloride
     Total  Suspended Solids
     Residual Solids
     Volatile Solids
                      UNITS

                       ug/1
                       ug/1
                       ug/1
                       ug/1
                       ug/1
                       ug/1
                       ig/1
                       mg/1
                       mg/1
                       mg/1
12
10
 9
 9
10
10
 3
12
12
12
 MEAN

 1.30
 1.70
 0.31
 0.12
 2.70
22.90
 0.00
 0.10
-0.09
 0.19
     The mean blank value of 22.9 ug/1 for silica  is  acceptable  because  the
smallest  increment on the Auto Analyzer chart paper is 50 ug/1.  The values of
the 1985 blanks indicate the distilled waters used  for  making  standards  and
rinsing  filter units contains minimal organic and inorganic material.   The low
blank values also indicate very little sample bottle contamination.

     The quality control program also includes the spiking  of  splits   with  a
known  concentration  in  a  1:1 ratio to determine the accuracy of the method.
Accuracy is a measure of the difference between a true  value  and  a  measured
value,  and  it  is  expressed  through  the  spike  difference and the percent
recovery.

        Spike Difference:  The difference between the actual spike value and
                           the theoretical spike value:

                    SPIKE DIFFERENCE  ACTUAL - THEORETICAL
     Percent Recovery:

                   PERCENT RECOVERY =
                            ACTUAL  X  IOCS

                              THEORETICAL
Where:
ACTUAL = Actual Spike Value of the Sample
         THEORETICAL = Spike Standard + Original Sample Value

                                           2 *

*  Division by 2 because of a 1:1 spike to sample ratio

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                      1985 CALCULATED SPIKE DIFFERENCES
                                                                        PAGE 42
PARAMETER

   TP
   TFP
   SRP
   N+N
   NH3
   SRS
   CL
UNITS
MEAN
ST OEV
 RANGE LIMIT
LOWER    UPPER
ug/1
ug/1
ug/1
ug/1
ug/1
ug/i
mg/1
-.64
-.92
1.33
.17
-.75
-3.97
-.16
.72
.77
1.47
11.04
6.39
118.51
.23
59
46
49
46
43
56
29
-2.80
-3.21
-3.06
-32.93
-19.93
-359.50
-.84
1.52
1.38
5.73
33.28
18.43
351.56
.52
 % SAMPLES
WITHIN RANGE

    100%
    100%
    100%
    97.81
    100%
    100%
    100*
                         1985 PERCENT RECOVERY RESULTS
    PARAMETER    N      MEAN PERCENT RECOVERY

      TP        59             98.05*
      TFP       46             96.91*
      SRP       49            105.33%
      N+N       46            100.151
      NH3       43             95.SOS
      SRS       56            100.06$
      CL        29             99.30%
                                     PERCENT RECOVERY RANGE
91.78* -
89.98% -
97.861 -
95.95* -
73.97% -
92.09% -
102.97%
100.90%
128.71%
112.36*
148.57%
109.43%
                                        97.99% - 102.57%
     Overall, the 1985 results indicate very good quality control.  Once again,
the  high  silica spike difference values are acceptable because of the 50 ug/1
chart paper increment.  However, the large percent recovery range of 73.97%  to
148.57%  indicates a slight problem with ammonia.  More effort will be taken to
decrease airborne ammonia contamination  and  therefore  increase  the  quality
control of ammonia.

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                                                                        PAGE  43
STANMOUS CHLORIDE VERSUS ASCORBIC ACID PHOSPHORUS METHOD
     From 1970 through 1977 all open lake phosphorus measurements made  by  the
Canada  Centre  for  Inland  Waters  and  Ohio  State University - CLEAR (Under
contract to the US-EPA), utilized only the stannous chloride procedure.   During
the  1978  and 1979 Lake Erie Intensive Study both stannous chloride  (CCIW)  and
ascorbic acid (US-EPA GLNPO) methods were employed on the open lake  phosphorus
analysis.   Upon  comparing  the  data  bases,  it was found that a significant
difference was apparent between the two data sets (Rathke 1984).

     In order to resolve this discrepancy between the data bases, a program was
implemented  during  the 1985 field season designed to compare the two methods.
The protocol was as follows:'

1,  All phosphorus samples {total, total filtered, and soluble  reactive 1   ware
analyzed  using  the  conventional  stannous chloride procedure as was employed
during the 1970 through 1977 open lake studies,  1978  and  1979  western  basin
nearshore, and the 1980 through 1982 open lake program.

2.  All total phosphorus samples would be re-analyzed using the  ascorbic   acid
procedure  employed  by  US-EPA GLNPO.  The initial digestion of the  raw sample
was that used for  the  stannous  chloride  procedure,   A  comparison  of  the
digestion procedure was not part of the plan.

3.  During two surveys (Surveys 5 and  8)  total  filtered  phosphorus  samples
would be re-analyzed using the protocol as described for total phosphorus.
     The central and eastern basin data sets were combined and treated  as  one
file.   Only  the  paired  phosphorus  data  was  used i.e., samples which were
analyzed by both  stannous  chloride  and  ascorbic  acid  methods.    The  BMDP
statistical  summaries  are presented in Figures 35 and 36 with a summary table
provided below:

           COMPARISON OF THE STANNOUS CHLORIDE AND ASCORBIC ACID
                          TOTAL PHOSPHORUS DATA

                STANNOUS CHLORIDE            ASCORBIC ACID

N                  372                           372
MEAN                12.0 (ST. ERR. 0.27)          11.9 (ST. ERR. 0.29)
MEDIAN              10.6 (ST. ERR. 0.23)          10.4 (ST. ERR. 0.26)
MAXIMUM             34.5                          39.0
MINIMUM              3.8                           3.3
RANGE               30.7                          35.8
ST. DEV.             5.3                           5.6
25                  8.6                           8.2
75t                 13.8                          13.7

-------
                                                                        PAGE 44
     It is evident from this Initial evaluation of the two data bases that  the
two  methods  produced nearly Identical results,  A survey by survey summary of
the total phosphorus data was made and is presented as a modified  notch  block
graph {Figure 37) which also shows the similarity of the two methods.

     Next, a data file was created by using the difference between the  notched
pairs:


           STANNOUS CHLORIDE - ASCORBIC ACID = DIFFERENCE (+)


COMPARISON OF THE COMPUTED DIFFERENCES BETWEEN PAIRED STANNOUS CHLORIDE
               AND ASCORBIC ACID TOTAL PHOSPHORUS VALUES
                       N               363
                    MEAN                 0.18 (ST.ER. 0.095
                  MEDIAN                 0.20 (ST.ER. 0.06)
                 MAXIMUM                 7.6
                 MINIMUM                -6.0
                   RANGE                13.6
                ST. DEV.                 1.8
                     25%                -0.8
                     75S                 1.1
A 0.0 difference between the two methods (distinct value  =  0.0)  was  reached
when  the  cumulative  percent  of  observations equaled 44.9% (Figure 38).  In
other words the negative values (ascorbic acid  values  greater  than  stannous
chloride)  represented  44.9%  of  the  data,  while  for 55.1% of the data the
reverse was true.  The positive mean and  median  results  indicated  that  the
stannous  chloride  values  were slightly greater than the ascorbic acid values
(0.18 ug/1).

     A t-test was used to determine if the two  data  sets  were  statistically
significantly different (a= 0.05).
The null hypothesis was:       H  -  X - Y
The test showed that these two methods were not statistically  different.   The
results  of the t-test indicated that total phosphorus data employing these two
procedures could be used interchangeably.  However, this would be true only  if
the digestion procedure employed in this test was utilized.

-------
                                                                        PAGE 45
     Analyses from two surveys were used  to  test  the  compatibility  of  the
methods  for determining total filtered phosphorus.  In general, total filtered
phosphorus concentrations are approximately half the  concentrations  of  total
phosphorus.   The  procedure used to analyze the total phosphorus data was also
employed to examine the total filtered phosphorus.  Figures 39 and  40  present
the  BMDP  statistical summaries for total filtered phosphorus data bases while
the following table presents a summary of the statistical information.

          COMPARISON OF THE STANNQUS CHLORIDE AND ASCORBIC ACID
                     TOTAL FILTERED PHOSPHORUS DATA
                STANNQUS CHLORIDE
N
MEAN
MEDIAN
MAXIMUM
MINIMUM
RANGE
ST. DEV.
25%
75*
103
6.4 (ST.
6.1 (ST.
14.7
0.3
14.4
3.6
3.5
8.9
ERR. 0.36)
ERR. 0.43)
    ASCORBIC  ACID

        103
          5.6 (ST.  ERR.
          4.5 (ST.  ERR.
         15.5
          0.3
         14.8
          3.4
          3.1
          8.1
         0.34)
         0.31)
A survey by survey comparison is presented in Figure 41.  It  is  evident  that
the difference noted in the two mean/median concentrations can be accounted for
in the last survey.  The stannous chloride results  are  1  ug/1  greater  than
those determined using the ascorbic acid procedure.

     The computed difference between paired samples is shown in  the  following
table.   Figure 42 presents the complete BMDP file output, further illustrating
the difference between the two data sets.   Two  thirds  of  the  data   (66.7S5
showed  that the stannous chloride procedure yielded higher concentrations than
the ascorbic acid method.

  COMPARISON OF THE COMPUTED DIFFERENCES BETWEEN PAIRED STANNOUS CHLORIDE
             AND ASCORBIC ACID TOTAL FILTERED PHOSPHORUS VALUES
                           N
                        MEAN
                      MEDIAN
                     MAXIMUM
                     MINIMUM
                       RANGE
                     ST. DEV.
                          25:
                          75*
102
  0.74 (ST.ER.
  0.80 (ST.ER.
  3.6
 -3.3
  6.9
  1.3
 -0.2
  1.8
0.13}
0.115
 A  t-test  indicated  that a  statistically  significant difference existed  between
 the   two  methods  for  the total  filtered  phosphorus analysis.  The  positive  mean
 (0.74 ug/1}  indicatd  that  the  stannous chloride method  produced  total   filtered
 phosphorus concentrations  higher  than  the ascorbic acid method.  The difference
 between the  methods was only apparent during  the  last survey  (Figure 41).

-------
                                                                       PAGE 46
                               REFERENCES  CITED

Burns, N.M.,  1976.  Oxygen Depletion  In  the Central  and  Eastern Basins of
    Lake Erie,1970. J.  Fish.  Res.  Bd Can.  33:512-519.

Burns, M.M.  and C.  Ross,  1972.  Project  Hypo:  An  intensive  study of Lake
    Erie central basin  hypolimnion and  related surface  water  phenomena.
    Canada Centre for Inland  Waters  Paper  No.  6,  U.S.-  EPA Technical
    Report TS-05-71-208-24. Ottawa,  Ont.   182p.

Carlson, R.E., 1977. A  Trophic  State Index for Lakes. Limnol. Oceanog.
    Vol. 22 (2) 361-368.

Clark, J.L.,  1981.  Guidelines for  Control  of  Analytical  Procedures in
    an Intralaboratory  Quality  Control  Program.  International Joint
    Commission In-House Mimeo.  11  p.

Oobson, H.F.H., 1976, Eutrophication Status of the  Great Lakes.
    Canada Centre for Inland  Maters  (Environment Canada)
    Unpublished Manuscript.  124 p.

Gregor, D.J., and Rast, W..  1979.  Trophic  Characterization of the
    U.S. and Canadian Nearshore Zones of  the  Great  Lakes.  International
    Joint Commission, PLUARG. 38p.

Hanson,B,, Rosa.F., and Burns,N.,  1978. Survey 8: A Budget Calculation
    Program for Lake Erie. Canada  Centre  for  Inland Waters. In-House
    Document, Unpublished Mimeo.  54  p.

Lake Erie Task Force, 1986.  Lake  Erie Surveillance  Plan.  Part 5.  IN:
    Great Lakes International Surveillance Plan  (GLISP),  International
    Joint Commission, Great Lake  Program Office,  Windsor,  Ontario.

Letterhos,J.A.,1982, CLEAR Analytical Methods Manual.   The Ohio State
    University. CLEAR Technical Report  No. 205.  142 p.

Maloney, T.E. (ed). 1979, Lake and Reservoir  Classification Systems.
    EPA 600/3-79-074. 241 p.

Rast.W. and Lee, G.R.,  1978.  Summary Analysis of the North America OFCO
    Eutrophication Project:  Nutrient Loading-Lake Response Relationships
     and Trophic State Indicies.  EPA 600/3-78-008.  454  p.

Rathke, O.E.   (ed), 1984.  Lake Erie Intensive  Study  1978-1979, Final Report,
    EPA 905/4-84-001.  484 p.

Rawson, D.S., 1956. Algal Indicators of Trophic  Lake Types. Limnol. and
    Oceanogr. Vol  1(1)  18-25.

-------
                                                                       PAGE 17
Reckhow, K.H., 1980.  Techniques for Exploring  and  Presenting  Data Applied
    to Lake Phosphorus Concentrations.  Can.  J.  Fish.  Aquat, Sci.
    37:290-294.

Rosa, F. 1987. Appendix B.  International  Joint Commission  (In Preparation*])

Rosa, F. and Burns, N.H.,1986.  Lake Erie  Central Basin  Oxygen Depletion
    Changes from 1929-1980.  J.  Great Lakes Research  (In Press).

Ruttner, F.,1963. Fundamentals  of Limnology. University of Toronto Press.
    Toronto. 307 pages.

Steinhart, C.E., Schelrow,  L.J.,  and Chesters,  G.,1981. An Environmental
    Quality Index for the Nearshore Waters of  the  Great Lakes. Great
    Lakes Environmental Planning  Study  Contribution  No. 42.   Hater
    Resources Center University of Wisconsin.  83 p.

Zafar, A.R., 1959. Taxonomy  of  Lakes.   Hydrobiologia.  13:287-299.

-------
                                         PAGE 48
TABLES

-------
                                                                PAGE 49
                       TABLE 1



1985 LAKE ERIE OPEN LAKE WATER QUALITY SURVEY  SCHEDULE
8ASIN
EB.CB
CB
EB.CB
CB
EB.CB
CB
CB
EB.CB
E8.CB
SURVEY
1
2
3
4
5
INTER
COMPARISON
6
7
8
DATE JULIAN DATE JULIAN MID POINT
MAY 15-MAY 17
JUNE 12-JUNE 13
JULY 2-JULY 4
JULY 24-JULY 25
AUGUST 6- AUGUST 8
AUGUST 27
AUGUST 28-AUGUST 29
SEPTEMBER 19-SEPTEMBER 21
NOVEMBER 12-NOVEMBER 15
135-137
163-164
183-185
205-206
218-220
239
240-241
262-264
316-319
136
163
184
205
219
239
240
263
318
                  EB  EASTERN BASIN



                  CB - CENTRAL BASIN

-------
                                                       PAGE 50
              TABLE 2
GEOGRAPHIC COORDINATES FOR THE 1985
         LAKE ERIE STATIONS
STATION
9
10
15
63
30
31
32
36
37
38
42
43
73
78
BASIN
EB
EB
EB
EB
CB
CB
CB
CB
CB
CB
CB
CB
CB
CB
LATITUDE
(N)
423218
424048
423100
422500
422548
421512
420454
415606
420636
421654
415754
414718
415840
420700
LONGITUDE
(H)
793700
794130
795336
794800
801218
810624
810042
312842
813430
814018
820230
815642
814525
811500
WATER DEPTH
Cm)
46.6
31.8
60.2
45.3
20.5
21.3
21.5
22.9
23.9
21.6
22.2
22.6
24.1
22.5
         EB = EASTERN BASIN

         CB = CENTRAL BASIN

-------
      TABLE 3
SYNOPSIS OF METHODS
                                               PAGE 51
PARAMETER
Specific
Conductance
Suspended
Solids
Temperature
Transparency
Turbidity
Alkalinity
Chloride
Ammonia
Nitrate +
Nitrite
pH
Dissolved
Oxygen
Soluble
Reactive
Phosphorus
Total
Phosphorus
Total
Filtered
Phosphorus
METHOD
In situ probe (Interocean)
Electrode (Beckman, YSI)
Gravimetric, using Whatman
GF/C glass fiber filters
Thermistor {InterOcean)
Mechanical Bathythermograph
MBS Calibrated Thermometer
Secchi Disk
Hach Turbidimeters
(Model 2100A and Ratio)
Titrimetn'c (.02N HC1)
Ferricyanide, AAII
Phenate Method, AAII
Cadmium Reduction, AAII
Electrode (InterOcean,
Martek, Orion)
Electrode (InterOcean,
Titrimetric (Hinkler azide
modification)
Stannous Chloride, AAII
Persulfate Digestion,
Stannous Chloride
Persulfate Digestion,
Stannous Chloride, AAII
RANGE
0-1000umhos/cm
1-10,000 mg/1
0-35 degrees'C
NA
0-1000 MTV
0-250 mg/1 CaC03
.5-50 mg Cl/1
0.5-100 ug N/l
1.0-200 ug N/l
2.0-400 uf N/l
.005-1 mg N/l
0-14
0-20 mg 02/1
.5-50 ug P/l
.5-50 ug/1
1.0-100 ug
DETECTION
LIMIT
2 umhos
If
.01 mg
0.2 degrees'C
.Olm
.02 NTV
.5 mg/1
.5 mg/1
.5 ug/1
1.0 ug/1
2.0 ug'l
.005 mg/1
0.1
0.05 nig 02/1
.5 ug/1
.5 ug/1
1.0 ug/1
Expanded further by Machine
or Manual Dilutions

-------
                                  TABLE 3 (CONTINUED)
                                  SYNOPSIS OF METHODS
                                                                                 PAGE 52
PARAMETER
        METHOD
RANGE
DETECTION
  LIMIT
Dissolved
Reactive
Silicate

Chlorophyll
Pheopigment
Kjeldahl
Nitrogen

Participate
Organic
Nitrogen

Participate
Organic
Carbon

Phyto-
pi a nk ton
Zooplankton
Molibdosilicate-Ascorbic      .03-5.00 mg        .03 mg/1
Acid-Oxalic Acid, AAII        S102/1
Acetone extinction            0-50 ug/1          .02 ug/1
Varian Spectrophotometer

Acetone extinction
Varian Spectrophotometer      0-50 ug/1          .04 ug/1

Analysis performed by
USEPA

Perkin-Elmer Model 240        0-5000 mg N        .002 mg
Elemental Analyzer
Perkin-Elmer Model 240        0-5000 mg C        .005 mg
Elemental Analyzer
Optical examination           macro *            species
(Collected / Niskin bottle,  nanoplankton
Preserved w/ Lugols)

Optical examination           .075 mm            species
(64 u net, CaC03 formalin +
sucrose)

-------
                                                                                 PAGE 53
                                        TABLE 4
               1985 CENTRAL BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                           PH
                                          (SU)
                                    ALK
                                    PHEN
                                   (MG/L)
                                       ALK
                                       TOT,
                                      (MG/L)
SURVEY 1
MAY 15 - MAY 17
                EPI
                HYPO
         MEAN
         STO. ERR.
         MEDIAN
         Ql
         Q3
         N

         MEAN
         STD. ERR.
         MEDIAN
         Ql
         Q3
         N
                  8.22
                  0.02
                  8.25
                  8.19
                  8.27
                 20
                  8.00
                  0.02
                  7.99
                  7.91
                  8.09
                 20
           0.00
           0.00
           0.00
           0.00
           0.00
           0

           0.00
           0.00
           0.00
           0.00
           0.00
           0
          95.54
           0.34
          95.70
          94.80
          98.60
          20

          95.69
           0.39
          96.15
          94.40
          96.60
          20
SURVEY 2
JUNE 12 - JUNE
13
 EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STO. ERR.
MEDIAN
01
Q3
N
 8.19
 0.02
 8.18
 8.14
 8.27
21

 7.68
 0.06
 7.61
 7.57
 7.74
 9
0.00
0.00
0.00
0.00
0,00
0

0.00
0.00
0.00
0.00
0.00
0
93.13
 0.43
93.10
91.40
94.00
21

94.56
 0.41
94.00
94.00
95.70
 9

-------
                                  TABLE 4 (CONTINUED}
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY /DATE DEPTH
SURVEY 3
JULY 2 - JULY 4
EPI





HYPO





STATISTICS


MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
PH
(SU)


8.33
0.01
8.35
8.32
8.37
30
7.52
0.03
7.55
7.42
7.59
12
ALK
PHEN
IMG/L)


4.94
0.35
5.20
4.40
6.10
9
0,00
0.00
0.00
0.00
0.00
0
ALK
TOT.
CMG/L)


95.14
0.25
95.70
94.00
95.90
30
95.92
0.49
95.70
94.85
97.00
12
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 8.43
 0.02
 8.48
 8.32
 8.52
30

 7.41
 0.02
 7.41
                                          7,
                                          7,
                                         19
   34
   49
 5.
 0.
 5.
 4.
 6.
30
  20
  22
  30
  40
  20
 0.
 0.
 .00
 .00
0.00
0.00
0.00
0
95.65
 0.30
95.90
95.00
96.80
30

97.69
 0.22
97.70
96.80
98.60
19

-------
                                                                                 PAGE 55
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                           PH
                                          CSU)
                           ALK
                           PHFN
                          (MG/L)
                      ALK
                      TOT.
                     (MG/L)
SURVEY 5
AUG. 6 - AUG. 8
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 8.33
 0.01
 8.34
 8.28
 8.39
30

 7.21
 0.06
 7.14
 7.09
 7.23
 8
                                                    0.33
                                                    4.10
                                                    3.00
                                                    5.10
                                                   28
   00
   00
   00
   00
 0.00
 0
         90.91
          3.19
         94.40
         92.40
         95.40
         30

         83.22
         12.05
         95.40
         92.40
         96,90
          8
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
01
03
N
 8.58
 0.02
 8.57
 8.53
 8.61
30

 7.44
 0.03
 7.43
 7.38
 7.50
10
 4.
 0.
 4.
 4.
 5.
30
50
16
00
00
00
 0.00
 0.00
 0.00
 0.00
 0.00
 0
 96.87
  0.22
 96.50
 96.50
 97.50
 30

104.00
  0.64
104.00
102.50
105.50
 10

-------
                                                                                 PAGE 56
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                           PH
                                          (SU)
                                    ALK
                                    PHEN
                                   (MG/L)
                      ALK
                      TOT.
                     (MG/L)
SURVEY 7
SEPT. 19 - SEPT. 21
                EPI
                HYPO
         MEAN
         STD. ERR.
         MEDIAN
         Ql
         Q3
         N

         MEAN
         STD. ERR.
         MEDIAN
         Ql
         Q3
         N
 8.35
 0.07
 8.47
 8.37
 8.56
34

 7.33
 0.02
                                            33
                                            30
                                            38
 3.
 0.
 3.
 2.
 4.
29
  07
  31
  00
  00
  00
 0.
 0.
 0.
 .00
 .00
 .00
0.00
0.00
0
 98.48
  0.71
 97.00
 96.50
 99.50
 34

108.10
  0.85
107.10
106.60
109.60
  6
SURVEY 8
NOV. 12 - NOV.
15
 EPI
                        MEAN
                        STD. ERR.
                        MEDIAN
                        Ql
                        Q3
                        N
 8.02
 0.01
 8.01
 7.98
 8.05
30
 1.71
 0.20
                                     1.
                                     1
                                     2
                                    27
   50
   00
   00
           97.37
            0.26
           97.50
           97.00
           98.50
           30

-------
                                                                                PAGE 57
                                  TABLE  4  (CONTINUED)
               1985 CENTRAL  BASIN  MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY /DATE DEPTH
SURVEY 1
MAY 15 - MAY 17
EPI





HYPO





STATISTICS


MEAN
STD. ERR.
MEDIAN
01
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
TEMP
CO


10.87
0.14
10.95
10.40
10.24
2U
7.45
0.15
7.35
6.95
7.85
20
00
(M6/L)


^2.57
0.20
12.50
11.85
12.95
20
12.11
0.15
12.20
11.60
12.60
20
00 SAT.
()


112.01
1.62
111.65
105.80
114.39
20
101.42
1.30
101.33
98.04
104.92
20
COND.CR
(UMHOS)


263.25
0.86
264.00
261.50
265.50
20
265.40
0.70
264.50
263.50
267.00
20
SURVEY 2
JUNE 12 - JUNE 13
                i-PI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
f.N
STD. ERR.
MEDIAN
Ql
Q3
N
14.79
0.12
14.60
14.40
15.40
21
9.77
0.47
9.50
8.70
10.10
9
10.04
0.13
10.00
9.60
10.20
21
8.38
0.27
8.60
7.80
9.00
9
96.54
1.10
95.84
93.51
98.18
21
73.27
2.61
73.82
67.80
77.70
9
269.52
1.37
270.00
269.00
272.00
21
273.22
2.39
273.00
270.00
277.00
9

-------
                                                                                 PAGE 58
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY  MEASUREMENTS
SURVEY /DATE DEPTH
SURVEY 3
JULY 2 - JULY 4
EPI





HYPO





STATISTICS


MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STO, ERR.
MEDIAN
01
Q3
N
TEMP
CO


18.31
0.18
18,60
17.60
19.00
30
12.10
0.34
11.95
11.00
13.20
12
00
(MG/L)


9.18
0.06
9.30
9.10
9.40
30
5.66
0.21
5,65
5.35
6.10
12
DO SAT.
U)


95.22
0.74
96.42
92.82
98.84
30
il.74
2.13
50.54
47.99
56.97
12
COND.CR
(UMHOS)


269.40
0.52
270.00
268.00
271.00
30
275.25
0.74
275.50
273.50
277.50
12
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
21.70
0.10
21.50
21.40
21.90
30
13.61
0.16
13.30
13.00
14,40
19
8.99
0.05
8.95
8.80
9.20
30
4.13
0.28
4.20
3.00
5.40
19
100.52
0.57
100.38
100,31
103.31
30
38.85
2.68
38.92
28,69
50.63
19
268.43
1.04
268.00
265.00
271.00
30
276.95
0.84
277.00
276.00
279.00
19

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
                                                                                 PAGE 59
SURVEY  /DATE   DEPTH   STATISTICS
TEMP
CO
  DO
(MG/L)
DO SAT.
 m
COND.CR
(UMHOS)
SURVEY 5
AUG. 6 - AUG. 8
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
22.03
0.03
22.00
22.00
22.20
30
14.15
0.25
14.30
13.50
14.50
8
8.40
0.29
8.70
8.50
8.80
30
1.75
0.33
1.45
1.10
2.30
8
i4.68
3.29
98.09
95.72
99.10
JO
16.68
3.24
13.68
10.37
21.82
8
267.10
0.79
267.00
264.00
269.00
30
276.50
1.02
277.00
275.00
278.50
8
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
01
Q3
N
22.27
0.03
22.30
22.20
22.40
30
15.66
0.51
15.65
14.70
17.00
10
8.23
0.04
8.20
8.00
8.50
30
0.33
0.11
0.20
0.10
0.60
10
93.32
0.49
93.11
90.73
96.18
30
3.29
1.07
1.93
0.97
5.88
10
267.20
O.SO
267.00
266.00
269.00
30
279.80
1.03
280.50
276.00
282.00
10

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
                                                                                 PAGE 60
SURVEY  /DATE   DEPTH   STATISTICS
                 TEMP
                 TO
  00
(MG/L)
DO SAT,
 (*)
COND.CR
(UMHOS)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
01
03
N
MEAN
STD. ERR.
MEDIAN
01
03
N
20.36
0.32
20.90
20.70
21.10
34
15.57
0.18
15.56
15.30
16.00
6
7.49
0.48
8.40
8.00
8.60
34
0.10
0.05
0.05
0.00
0.20
6
82.49
5.29
92.41
87.40
95.94
34
0.98
0.51
0.49
0.00
1.97
6
268.97
1.18
268.00
267,00
269.00
34
282.83
1.25
282.50
281.00
284,00
6
SURVEY 8
NOV. 12 - NOV. 15
                EPI
MEAN
STO. ERR.
MEDIAN
01
Q3
N
12.26
0.05
12.25
12.20
12.50
30
10.19
0.44
10.20
10.00
10.40
30
93.26
0.36
93.61
91.80
95.08
30
266.10
0.88
267.00
264.00
269.00
30

-------
                                                                                 PAGE 61
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
 TSS
(MG/L)
 RS
(MG/L)
 VS
(MG/L)
PERVS
 (*)
SURVEY 1
MAY 15 - MAY 17
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
01
Q3
N
MEAN
STD. ERR.
MEDIAN
01
03
N
1.33
0.07
1.25
1.17
1.47
18
2.43
0.66
1.63
1.21
1.80
18
0.63
0.05
0,55
0.51
0.73
18
1.63
0.53
0.95
0.64
1.19
18
0.70
0.03
0.68
0.58
0.80
18
0.80
0.14
0.63
0.52
0.75
18
53.00
1.72
52.67
56.91
45.70
18
40.87
2.76
41.28
30.06
47.22
18
SURVEY 2
JUNE 12 - JUNE 13
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
03
N
1.06
0.09
1.00
0.69
1.35
20
3.08
0.38
2.96
2.23
4.00
9
0.47
0.08
0.31
0.14
0.79
20
2.18
0.37
2.52
1.24
3.11
9
0.60
0.03
0.50
0.51
0.67
20
0.94
0.06
0.89
0.79
1.06
9
62.15
4.61
59.84
40.19
79.12
20
33.86
4.04
27.36
23.65
47.53
9

-------
                                  TABLE 4 (CONTINUED)
               1988 CENTRAL IAS1M MEAN/MEDIAN HATER QUALITY MEASUREMENTS
                                                                                 PAGE 62
SURVEY  /DATE   DEPTH   STATISTICS
                 TSS
                {MG/L)
 RS
(MG/L)
 VS
(MG/L)
PERVS
 (I)
SURVEY 3
JULY 2 - JULY 4
                EP!
                HYPO
MEAN
STO, ERR.
MEDIAN

Q3
N

MEAN
STD. ERR.
MEDIAN
01
03
N
0.70
0.06
0.57
0.48
0.83
29
2.22
0.20
2.38
1.70
2.78
12
0.28
0.05
0.19
0.12
0.38
29
1.49
0.16
1.49
0.97
1.98
12
0.42
0.03
0.42
0.34
0.47
29
0.73
0.09
0.72
0.53
0.84
12
64.61
3.28
65.06
55.42
73.53
29
33.53
2.94
31.13
27.62
35.58
12
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
03
N
MEAN
STD. ERR.
MEDIAN
Ql
03
N
0.63
0.04
0.57
0.48
0.67
27
3.22
1.20
2.06
1.63
2.45
19
0.17
0.02
0.12
0.10
0.19
27
2.40
1.03
1.41
1.04
1.75
19
0.46
0,03
0.46
0.34
0.55
27
0.82
0.19
0.62
0.49
0.64
19
74.41
2.38
75.61
69.78
83.61
"7
30.85
2.64
26.54
24.02
36.47
19

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
                                                                                 PAGE 63
SURVEY  /DATE   DEPTH   STATISTICS
 TSS
(MG/L)
 RS
(MG/L)
 VS
(MG/L)
PERVS
SURVEY 5
AUG. 6 - AUG.  8
                EPI
                HYPO
(CAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
0.73
0.05
0.68
0.58
0.80
29
2.76
0.48
2.46
2.18
3.32
7
0.16
0.02
0.12
0.08
0.20
29
1.96
0.46
1.76
1.49
2.51
7
0.17
0.05
0.55
0.47
0.64
29
0.81
0.05
0.81
0.69
0.93
7
78.11
2.83
83.33
72.97
87.50
29
36.75
8.93
30.58
24.40
37.80
7
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
0.95
0.04
0.95
0.87
1.08
30
2.15
0.41
1.89
1.12
2.68
10
0.20
0.02
0.19
0.12
0.27
30
1.46
0.37
1.20
0.58
1.91
10
0.75
0.03
0.72
0.63
0.86
30
0.70
0.08
0.59
0.53
0.77
10
79.02
1.77
80.71
72.59
86.73
30
36.88
3.23
34.80
28.73
48.21
10

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
                                                                                 PAGE 64
SURVEY
/DATE
DEPTH
STATISTICS
TSS
(MG/L)
RS
(MG/L)
VS
(MG/L)
PERVS
(*)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                HYPO
MEAN
STO. ERR.
MEDIAN
QI
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
1.64
0.11
1.56
1.12
2.03
34
2.24
0.40
1.93
1.63
2.39
6
0.80
0.10
0.67
0.41
1.00
34
1.45
0.38
1.29
1.10
1.44
6
0.84
0.10
0.86
0.60
1,04
34
0.79
0.14
0.88
0.62
1.03
6
55.08
2.96
54.28
44.00
65.87
34
38.21
8.65
37.28
22.76
47.23
6
SURVEY 8
NOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
03
N
4.15
0.37
4.01
2.10
5.40
30
3.14
0.32
2.76
1.55
3.84
30
1.01
0.08
0.84
0.66
1.41
30
26.92
1.61
24.67
20.47
34.44
30

-------
                                                                                PAGE 65
                                 TABLE  4  (CONTINUED)
               1985 CENTRAL  BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY /DATE DEPTH
SURVEY 1
HAY 15 - MAY 17
EPI





HYPO





STATISTICS


MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
01
03
N
CHLA
CORR,
(UG/L)


2.18
0.15
2.25
1.96
2.55
20
2.16
0.13
2.20
1.73
2.42
20
PHEO.
(UG/L)


0.56
0.13
0.38
0.21
0.68
20
0.59
0.11
0.41
0.34
0.73
20
TURBID
(NTU)


1.22
0.07
1.10
1.00
1.45
20
2.63
1.05
1.35
1.10
1.70
20
SECCHI
(METER)


3.66
0.28
3.55
3.10
3.80
8
tJA
NA
NA
NA
NA
NA
SURVEY 2
JUNE 12 - JUNE 13
                EP!
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MIAN
STD. ERR.
MEDIAN
01
03
N
1.00
0.09
1.09
0.69
1.35
21
1.14
0.19
0.90
0.80
1.67
9
0.85
0.14
0.61
0.35
1.26
21
2.25
0.50
1.97
1.66
2.27
9
0.96
0.13
0.60
0.50
1.50
21
3.03
0.40
3.50
2.30
3.80
9
  90
  21
  80
  60
  30
NA
NA
NA
NA
NA
NA

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY /DATE DEPTH
SURVEY 3
JULY 2 - JULY 4
EPI





HYPO





STATISTICS


MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
CHLA
CORR.
(UG/L)


1.18
0.19
0.95
0.64
1.29
28
0.91
0.14
0.79
0.58
1.22
12
PHEO.
(UG/L)


0.60
0.16
0.39
0.16
0.82
30
1.12
0.22
0.96
0.56
1.55
12
TURBID
(NTU)


0.64
0.10
0.45
0.30
0.60
30
2.28
0.23
2.35
1.85
2.75
12
SECCHI
(METER)


7.53
0.87
7.30
7.00
9.30
7
NA
NA
NA
NA
NA
NA
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
2.14
0.16
1.93
1.48
2.58
30
1.64
0.89
1.80
1.50
2.10
19
0.50
0.10
0.34
0.20
0.65
30
2.44
1.03
1.21
0.75
1.92
19
0.46
0.04
0.40
0.20
0.60
30
2.68
0.89
1.80
1.50
2.10
19
7.88
0.41
7.55
6.90
8.70
8
NA
NA
NA
NA
NA
NA

-------
                                                                                 PAGE 67
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN  MATER QUALITY  MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
             CHLA
             CORR.
             (UG/U
                                                PHEO.
                                               (UG/L5
SURVEY 5
AUG. 6 - AUG. 8
                       TURIIO
                       (NTU)
                       SECCHI
                       (METER)
                EPI
                HYPO
1C AN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 2.81
 0.14
                                      2.
                                      2.
                                      3.
                                     30
   61
   24
   18
 2.49
 0.88
 1,17
 0.81
                                        01
 0.80
 0.10
 0.63
 0.44
 0.94
30
 4.55
 0.79
 4.37
 2.77
              55
 0.40
 0.01
 0.40
 0.40
 0.40
30
 0.51
 2,45
 1.60
 3.65
 8
 6.73
 0.23
 6.65
 6.30
 7.20
 6

 NA
 NA
 NA
 NA
 NA
 NA
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 2.70
 0.14
 2,68
 2.31
 3.14
30

 0.58
 0.11
 0.53
 0.31
 0.69
10
 1.46
 0.18
 1.05
 0.79
 1.67
30

 1.66
 0.44
 1.33
 0.51
 2.31
 0.49
 0.02
 0.50
 0.40
 0.60
30

 2.43
 0.57
                                                            2.
                                                            0.
                                                            3.
                                                           10
   10
   80
   30
 4.33
 0.27
 4.
 3.
 4.
 7

NA
NA
NA
NA
NA
NA
                                                                          20
                                                                          90
                                                                          50

-------
                                                                                 PAGE 68
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
             CHLA
             CORK.
             (UG/U
                                                PHEO.
                                               (UG/L)
                      TURBID
                      (NTU)
                       SECCHI
                       (METER)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 7.24
 2.03
 5.16
 3.94
 6.03
34

 2.07
 0.51
 1.76
 1.29
 a.31
 6
 1.76
 0.39
 i.32
 1.13
 1.55
34
 1.34
 0.49
 0.88
 0.81
 1.30
 6
 1.01
 0.92
 0.85
 0.70
 1.20
34

 1.38
 0.27
 1.05
 l.OC
 1.50
 6
4
0
4
4
4
5

NA
NA
NA
NA
NA
NA
.40
.20
.40
,20
.60
SURVEY 8
MOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
   70
   36
   90
                                       1.80
                                       4.40
                                      30
 4.39
 0.45
 4.20
 2,45
 5.04
30
 3.50
 0.36
 2.90
 1.80
 4.40
30
 2.72
 0.61
 3.15
 1.85
 3.60
 4

-------
                                                                                 PAGE 69
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
NITRATE   AMMOMIA   KJELDAHL   SOLUBLE
NITRITE   NITROGEN  NITROGEN   SILICA
(UG/L)    (UG/L1     (UG/L)    (UG/L)
SURVEY 1
MAY 15 - MAY 17
                EPI
                HYPO
SURVEY 2
JUNE 12 - JUNE 13
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
177.1
6.5
170.0
158.0
197.0
20
183.0
5.9
180.0
166.5
187.0
20
2.1
0.6
1.5
1.0
2,5
19
6.7
1.2
7.3
0.5
10.5
19
255.0
75.0
255.0
180.0
330.0
2
NA
NA
NA
NA
NA
NA
120.3
13.8
104.5
75.0
138.5
20
150.4
20.6
150.0
75.0
224.0
19
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
283.4
31.3
177.0
164.0
465.0
21
253.8
25.6
202.0
199.0
281.0
9
11.2
1.5
9.6
7.9
14.7
21
25.3
4.0
22.4
20.2
28.1
9
248.6
17.0
220.0
200.0
270.0
21
308.9
32.9
280.0
260.0
310.0
9
320.7
22.9
300.0
288.0
349.0
21
627.3
108.7
744.0
450.0
855.0
9

-------
                                                                                 PAGE 70
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
NITRATE   AMMOMIA   KJELDAHL   SOLUBLE
NITRITE   NITROGEN  NITROGEN   SILICA
(UG/L)    (UG/L)     (UG/L)    (UG/L)
SURVEY 3
JULY 2 - JULY 4
                EPI
                HYPO
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
01
03
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
215.3
18.8
162.5
145.0
252.0
30
228.0
11.8
216.5
194.0
273.5
12
8.4
1.7
6.7
4.4
8.2
30
53.1
28.4
25.9
18.1
32.0
12
126.9
10.9
130.0
80.0
170.0
29
179.2
24.4
160.0
120.0
240.0
12
268.4
17.6
254.0
205.0
284.0
30
1216.9
60.3
1224.0
1084.5
1366.0
12
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
198.0
10.8
180.0
157.0
200.0
30
244.2
9.8
242.0
215.0
250.0
19
5.2
0.7
4.3
2.5
5.8
30
25.7
2.4
28.0
20.7
29.5
19
212.3
11.5
215.0
170.0
240.0
30
237.8
31.2
220.0
170.0
240.0
18
410.1
16.9
423.5
350.0
475.0
30
1664.5
91.0
1767.0
1435.0
1910.0
19

-------
                                                                                 PAGE 71
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
NITRATE   AMMOMIA   KJELOAHL   SOLUBLE
NITRITE   NITROGEN  NITROGEN   SILICA
(UG/L)    (UG/L5     (UG/L)    (UG/L)
SURVEY 5
AUG. 6 - AUG. 8
                EPI
                HYPO
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
197.2
5.3
200.5
186.0
218.0
30
26?. 6
10.6
267.5
239.0
283.0
8
7.3
0.5
6.8
5.4
8.0
29
9.6
0.8
10.6
8.2
11.4
8
154.3
12.0
160.0
110.0
180.0
30
167.5
16.2
160.0
150.0
170.0
8
312.0
12.2
310.0
265.0
375.0
27
2740.0
93.0
2765.0
2557.0
2974.0
7
MEAN
STO. ERR.
MEDIAN
Ql
03
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
173.5
6.9
175.5
163.0
199.0
32
69.8
24.6
21.0
15.0
153.0
9
18.1
8.4
7.8
5.7
10.7
32
87.5
16.2
76.4
45.5
118.9
9
219.6
20.3
200.0
170.0
260.0
25
348.8
48.2
345.0
260.0
440.0
8
819.0
169.4
590.0
502.5
651.5
32
4415.2
223.4
4466.0
4229.0
4822.0
9

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
                                                                                 PAGE 72
SURVEY  /DATE   DEPTH   STATISTICS
NITRATE   AMMOMIA   KJELDAHL   SOLUBLE
NITRITE   NITROGEN  NITROGEN   SILICA
(UG/L)    (UG/L)     (UG/L)    (UG/L)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                HYPO
SURVEY 8
NOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
121.6
5.1
125.0
114.0
135. 0
29
2.5
0.9
2.0
1.5
3.5
4
8.0
0.7
7.7
5.4
10.4
29
228.3
23.0
211.4
181.1
291.1
6
312.4
27.0
320.0
240.0
410.0
25
266.7
12.0
260.0
250.0
290.0
3
370.0
22.1
360.0
280.0
460.0
29
4740.8
266.1
4919.0
4167.0
4980.0
6
MEAN
STD. ERR.
MEDIAN
Ql
0.3
N
121.5
4.4
128.0
115.0
133.0
30
21.3
4.9
15.1
13.1
18.0
30
199.3
17.3
195.0
150.0
240.0
30
389.8
23.3
393.0
312.0
491.0
30

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
                                                                                 PAGE 73
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL
                  PHOSPHORUS  FILTERED
                             PHOSPHORUS
                    (UG/L)     (UG/L)
                    SOLUBLE      TOTAL
                    REACTIVE    CHLORIDE
                    PHOSPHORUS
                     (UG/L)      (MG/L)
SURVEY 1
MAY 15 - MAY 17
                EPI
                HYPO
SURVEY 2
JUNE 12 - JUNE 13
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
03
N
9.9
0.4
9.7
8,7
11.2
20
10.4
0.6
9.8
9.0
11.1
^0
4.6
0.2
4.6
3.9
5.3
20
5.3
0.2
5.0
4.6
6,0
20
4.5
1.0
4.0
1.4
5.9
14
5.7
1.5
4.0
0.9
6.8
17
        MEAN
        STD. ERR.
        MEDIAN
        Ql
        Q3
        N

        MEAN
        STD. ERR.
        MEDIAN
        Ql
        Q3
        N
10.7
 0.6
 9.8
 8.9
13.0
21

17.7
 1.2
17.2
15.3
21.0
 8
 5.6
 0.6
 4.1
 3.4
 7.9
21

 7.2
 0.9
 6.0
 5.6
 9.9
 9
 2,5
 0.2
 2.9
 1.8
 3.2
21

 4.3
 0.9
 2.5
 2.2
 7.2
 9
                                                       14.6
                                                        0.2
                                                       14.4
                                                       14.0
                                                       15.0
                                                       20
                                                       14.3
                                                        0.2
                                                       14.1
                                                       13.8
                                                       14.9
                                                       20
15.1
 0.2
15.0
14.0
16,0
21

15.0
                                                                        0,
                                                                       15,
                                                                       14
                                                                       15
                                                                        9

-------
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
                                                                                 PAGE 74
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL     SOLUBLE      TOTAL
                  PHOSPHORUS  FILTERED   REACTIVE    CHLORIDE
                             PHOSPHORUS  PHOSPHORUS
                    (UG/L)     (UG/L)     (UG/L)      (MG/L)
SURVEY 3
JULY 2 - JULY 4
                EPI
                HYPO
SURVEY 4
JULY 24 - JULY 25
                EPI
                HYPO
MEAN
STD. ERR.
MEDIAN
01
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
7.8
0.5
7.8
6.4
8.4
30
13.5
0.8
13.9
12.7
15.0
10
4.9
0.3
4.7
3.7
5.6
27
6.5
0,5
5.6
5.2
8.0
11
1.0
O.I
0.8
0.5
1.0
30
1.7
0.1
1.5
1.4
2.0
12
15.1
0.1
14.9
14.6
15.7
30
15.0
0.2
14.8
14.5
15.3
11
MEAN
STD. ERR.
MEDIAN
01
03
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
9.9
0.9
9.1
7.9
10.8
30
13.6
1.4
13.2
10.1
14.6
19
4.4
0.2
4.2
3.7
4.8
29
6.0
0.3
5.8
5.0
7.1
19
1.2
O.I
l.l
0.9
1.4
30
2.0
0.2
2.0
1.4
2.4
19
14.8
0.1
14.9
14.7
15.0
30
14.8
0.1
14.7
14.6
15.0
19

-------
                                                                                 PAGE 75
                                  TABLE 4 (CONTINUED)
               198S CENTRAL BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL
                  PHOSPHORUS  FILTERED
                             PHOSPHORUS
                    (UG/L)     (UG/L)
                     SOLUBLE       TOTAL
                     REACTIVE     CHLORIDE
                     PHOSPHORUS
                      (UG/L)       (HG/L)
SURVEY 5
AUG. 6 - AUG. 8
                EPI
                HYPO
SURVEY 6
AUG. 28 - AUG. 29
                EPI
                HYPO
        MEAN
        STD. ERR.
        MEDIAN
        Ql
        Q3
        N

        MEAN
        STD. ERR.
        MEDIAN
        Ql
        Q3
        N
        MEAN
        STD. ERR.
        MEDIAN
        Ql
        Q3
        N

        MEAN
        STD. ERR,
        MEDIAN
        Ql
        Q3
        N
  9,9
  0.3
  9.4
  8.6
 11.2
 30
 21.6
  3.0
 23.3
 14.3
 27.1
  8
 22.6
  8.9
 12.2
 11.1
 14.2
 32

120.5
 29.0
101.4
 52.4
158.0
  9
  4.2
  0.3
  4.0
  3.2
  4.7
 30

  9.8
  1.5
 10.4
  5.6
 13.4
  8
 14.9
  6.7
  7.6
  6.0
  8.4
 32

 86.1
 19.8
 66.6
 45.8
127.2
  9
 1.2
 0.2
 1.3
 0.3
 1.5
26

 3.3
 0.7
 3.1
 1.6
 5.3
 8
 6.4
 3.6
 2.2
 2.0
 2.6
32

50.2
11.5
40.2
28.0
72.8
 9
15.1
 0.1
15.0
14.9
15.5
30

14.8
 0,1
14.8
14.7
15.0
 8
15,
 0,
                                                                       15.3
                                                                       15.0
                                                                       15.5
                                                                       32
15.
 0,
15,
                                                                        15.0
                                                                        15.2

-------
                                                                                 PAGE 76
                                  TABLE 4 (CONTINUED)
               1985 CENTRAL BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL
                  PHOSPHORUS  FILTERED
                             PHOSPHORUS
                    (UG/L)     (UG/L)
                     SOLUBLE      TOTAL
                     REACTIVE    CHLORIDE
                     PHOSPHORUS
                      (UG/L)      (MG/L)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                HYPO
        MEAN
        STD. ERR.
        MEDIAN
        Qi
        Q3
        N

        MEAN
        STD. ERR,
        MEDIAN
        Ql
        Q3
        N
 16.0
  0.6
 15.9
 14.8
 17.3
 26

141.6
 41.7
118.5
                                     68
                                    196
  6.7
  0.6
  7.2
  5.6
  8,4
 26
118.6
 32.0
107.5
 62.6
182.7
  6
 1.9
 0.2
 1.8
 1.1
 2.4
29

59.0
17
59
16
                       99.4
15.6
 0.2
15.3
15.1
15.5
30
15.2
 0.2
15.3
14.7
15.7
 6
SURVEY 8
NOV. 12 - NOV. 15
                EPI
        MEAN
        STD. ERR,
        MEDIAN
        Ql
        03
        N
 23.0
  1.0
 23.5
 18.9
 26.6
 30
 10.3
  0.4
  9.8
  8.9
 11.9
 30
 4.2
 0.2
 4.3
 3.8
 4.8
30
14,
 0,
                                                                       14.8
                                                                       14.4
                                                                       15.0
                                                                       30

-------
                                                                                 PAGE 77
                                        TABLE 5
               198i EASTERN BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                           PH
                                          (SU)
                           ALK
                           PHEN
                          (MG/LJ
 ALK
 TOT,
(MG/L)
SURVEY 1
MAY 15 - MAY 17
                EPI
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
7.90
0.04
7.90
7.88
7.96
13
0.00
0.00
o.no
0.00
0.00
0
95.17
0.38
95.70
94.80
96.60
13
SURVEY  3
JULY 2 - JULY 4
                EPI
                ME SO
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
8.48
0.02
8.48
8.44
8.53
8
8.10
0.07
8.13
7.90
8.26
8
7.79
0.01
7.78
7.76
7.82
11
5.50
0.49
5.75
4.40
6.60
8
1.78
0.35
1.80
1.35
2.20
4
0.0
0.0
0.0
0.0
0.0
0
97,14
0.34
9?, 70
96.80
97.70
8
96.80
0.24
96.80
96.35
97.25
8
98.33
0.51
98.60
97.70
99.40
11

-------
                                                                                 PAGE 78
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY   /DATE   DEPTH   STATISTICS
                                           PH
                                          (SU)
                            ALK
                           PHEN
                          (MG/L)
  ALK
 TOT.
EMG/L)
SURVEY 5
AUG. 6 - AUG.8
                EPI
                ISO
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
03
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
8.31
0.02
8.31
8.25
8.36
12
7.55
0,10
7.51
7.38
7.72
4
7.56
0.05
7,60
7.40
7.75
11
3.88
0.37
4.10
3.00
5.10
11
0.00
0.00
0.00
0.00
0.00
0
0.00
0.00
0.00
0.00
0.00
0
96.34
0.62
96.40
94.40
97.50
12
97.70
0.78
97.45
96.40
99.00
4
97.07
0.48
97.40
95.40
98.50
11

-------
                                                                                 PAGE 79
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                           PH
                                          (SU)
                           ALK
                           PHEN
                          (MG/L)
                      ALK
                      TOT,
                     (MG/LS
SURVEY  7
SEPT. 19 - SEPT. 21

                EPI
                ME SO
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
03
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR,
MEDIAN
Ql
Q3
N
8.43
0.03
8.45
8.40
8.49
12
7.73
0.03
7.70
7.69
7.76
4
7.65
0.02
7.65
7.64
7.70
11
2.75
0.43
2.50
1.50
4.00
12
0,00
0.00
0.00
0.00
0.00
0
0.00
0.00
0.00
0.00
0.00
0
95.50
0.35
95.50
94.50
96.00
12
98.25
0.63
98.50
97.50
99.00
4
99.34
0.67
98.50
97.50
100.50
11
SURVEY  8
NOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 7.89
 0.01
 7.89
 7.87
 7.92
12
1.00
0.13
1.00
0.75
1.25
8
102.13
  0.25
102.25
101.50
102.50
 12

-------
                                  TABLE 5  (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN MATER QUALITY
SURVEY  /DATE   DEPTH   STATISTICS
                 TEHP
                 CO
  DO
(MG/L)
00 SAT.
 (I)
CONO.CR
(UMHOS)
SURVEY 1
MAY 15 - MAY 17
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
4.42
0.18
4.30
4.00
4.50
13
13.08
0.08
13.10
12.80
13.20
13
104.11
0.93
103.13
101.78
105.14
13
263.85
1.20
264.00
261.00
265.00
13
SURVEY 3
JULY 2 -JULY 4
                EPI
                ME SO
                HYPO
MEAN
STO. ERR.
MEDIAN
01
Q3
N

MEAN
STD.ERR.
MEDIAN
Ql
03
N

MEAN
STD. ERR,
MEDIAN
Ql
Q3
N
19.70
0.48
19.30
18.65
20.80
8
12.28
1.19
13.15
9.65
15.25
8
5.15
0.28
5.00
4.50
5.30
11
9.46
0.24
9.40
9.15
9.70
8
9.95
0.25
9.70
9.45
10.55
8
10.55
0.37
11.10
10.10
11.30
11
101.14
2.73
100.40
97.94
105.97
8
91.31
2.54
92.26
84.53
94.69
8
84.93
2.81
88.26
80.45
90.31
11
270.63
1.03
271.00
268.50
273.00
8
274.00
0.60
274.00
273.00
275.50
8
277.09
0.58
277.00
275.00
278.00
11

-------
                   TABLE 5 (CONTINUED)
1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY /DATE
SURVEY 5
AUG. 6 - AUf,. I


















DEPTH STATISTICS

5
EPI MEAN
STD. ERR,
MEDIAN
Ql
Q3
N
ME SO MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
HYPO MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
TEMP
CO


21.54
0.06
21.60
21.45
21.70
12
14.52
1.32
14.80
12.35
16.70
4
5.82
0.44
5.10
4.90
7,70
11
00
(MG/L)


8.89
0.05
8.85
8.80
9.05
12
8.35
0.62
8.50
7.55
9.15
4
9.70
0.40
10.30
9.40
10.50
11
00 SAT.
(X)


99.06
0.65
98.96
97.37
101.08
12
79.96
6.03
77.97
71.63
88.29
4
78.89
2.83
82.21
79.10
84.48
11
CONO.CR
(UMHOS)


273.67
2.35
272,00
269.00
274.50
12
279.00
2.52
280.00
276.00
282.00
4
279.27
0.75
280.00
278.00
281.00
11

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                                         TEMP
                            DO
                          (MG/L)
DO SAT,
 (I)
CONO.CR
(UMHOS)
SURVEY 7
SEPT. 19 - SEPT. 21

                EPI
                ME SO
MEAN
STO. ERR.
MEDIAN
Cl
03
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
20.47
0.08
20.60
20.40
20.60
12
11.65
1.37
11.80
9.70
13.60
4
8.23
0.11
8.35
8.15
8.50
12
6.15
0.55
6.10
5.30
7.00
4
89.41
1.32
91.01
88.54
92.11
12
55.55
4.67
56.81
48.04
63.06
4
271.58
0.80
271.50
270.00
272.50
12
281.50
1.19
281.50
279.50
283.50
4
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
6.19
0.29
6.00
5.40
6.70
11
7.47
0.27
7.0
7.30
8.00
11
01.16
2.01
63,35
f.0.37
05.36
11
           282.91
             1.02
           283.00
           281.00
           285.00
            11
SURVEY 8
NOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
11.18
0.16
11.40
It. IS
11.55
12
10.14
0.01
10.10
10.10
10.20
12
90.94
0.31
91.03
90.69
91.50
12
274.83
1.10
275.00
271.50
278.00
12

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                 TSS
                (MG/L)
 RS
(MG/L)
 VS
(MG/L)
PERVS
 U)
SURVEY 1
MAY 15 - MAY 17
                EPI
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
3.23
0.85
2.47
1.87
2.87
12
1.86
0.33
1.41
1.34
1.89
12
1.37
0.54
0.77
0.61
1.09
12
36.41
3.53
31.32
27.99
43.22
12
SURVEY 3
JULY 2 - JULY 4
                EPI
                ME SO
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
03
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR,
MEDIAN
Ql
Q3
N
0.66
0.06
0.63
0.53
0.77
8
0.93
0.10
0,93
0.73
1.01
8
2.17
0.31
1.76
1.61
2.81
11
0.30
0.06
0.23
0.17
0.42
8
0.43
0.10
0.38
0.22
0.56
8
1.50
0.33
1.28
0.53
2.31
11
0.37
0.04
0.39
0.27
0.45
8
0.50
0.02
0.51
0.47
0.55
8
0.67
0.15
0.47
0.40
0.73
11
56.62
6.21
60.10
42.07
71.79
3
57.42
5.76
59.17
44.96
69.43
8
34.54
7.57
23.81
17.79
47.00
11

-------
                                  TABLE 5  (CONTINUED)
               1985 EASTERN BASIN  MEAN/MEDIAN  WATER  QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                 TSS
                (m/i)
 RS
(M6/L)
 VS
(MG/L)
PERVS
 (*)
SURVEY 5
AUG. 6 - AUG.  8
                 EPI
                ME SO
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
0.56
0.01
0.58
0.54
0.60
12
1.14
0.26
1.07
0.80
1.48
4
2.37
0.22
2.41
1.84
3.05
11
0.16
0.01
0.16
0.13
0.19
12
0.74
0.24
0.66
0.41
1.07
4
1.54
0.25
1.48
0.63
2.12
11
0.40
0.01
0.39
0.38
0.45
12
0.40
0.04
0.41
0.34
0.47
4
0.83
0.23
0.52
0.40
0.74
11
71.58
1.81
70.37
67.43
76.92
12
39.60
6.65
38.84
28.84
50.35
4
34.13
7.59
21.76
18.93
38.83
11

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY
/DATE
DEPTH
STATISTICS
TSS
(MG/L)
RS
(MG/L)
VS
(MG/L)
PERVS
(*)
SURVEY 7
MOV, 12 - HOY. 15
                EPI
                MESO
                HYPO
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N

MEAN
STO. ERR.
MEDIAN
Ql
Q3
N

MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
0.94
0.05
0.91
0.78
1.11
12
0.91
0.10
0.87
0.76
1.06
4
1.72
0.29
1.45
1.26
1.95
10
0.41
0.05
0.42
0.26
0.51
12
0.43
0.07
0.44
0.32
0 65
4
1,29
0.27
1.16
0.87
1.50
10
0.53
0.05
0.53
0.42
0.67
12
0.48
0.09
0.52
0.34
0.62
4
0.42
0.05
0.37
0.33
0.45
10
57.41
4.46
60.57
45.01
70.41
12
51.97
7.55
55.75
41.68
62.26
4
28.16
4.75
21.70
19.57
30.95
10
SURVEY 8
MAR. 3 - APR. 5
                EPI
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
 1.81
 0.30
 1.42
 1.29
 1.52
12
1.34
0.29
0.97
  83
  08
                                                    0
                                                    1
                                                   12
 0.47
 0.03
 0.47
 0.38
 0.56
12
29.59
 2.43
30.29
26.01
37.60
12

-------
                                                                                 PAGE 86
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
SURVEY 1
MAY 15 - MAY 17
                                CHLA
                                CORR.
                                (UG/L)
                                                   PHEO.
                                                  (UG/L)
                    TURBID
                    (NTU)
                    SECCHI
                   (METER)
                EPI
               MEAN
               STD. ERR.
               MEDIAN
               Ql
               Q3
               N
 1.17
 0.17
 0.99
 0.75
 1.44
12
                                                    0
                                                    0
                                                   12
0.50
0.12
0.40
  26
  80
  2.
  0,
  2.
  2.
  3.
 13
57
18
10
10
00
3.28
0.23
3.20
3.00
3.55
4
SURVEY 3
JULY 2 -
JULY 4
                EPI
                ME SO
                HYPO
               MEAN
               STD. ERR.
               MEDIAN
               Ql
               Q3
               N

               MEAN
               STD. ERR.
               MEDIAN
               Ql
               Q3
               N

               MEAN
               STD. ERR.
               MEDIAN
               Ql
               Q3
               N
 0.89
 0.12
 0.84
 0.63
 1.10
 8
1.57
0.38
1.30
0.73
2.38
0.41
0.07
0.40
0.25
0.55
8
1.73
0.20
1.76
1.25
2.20
8
0.62
0.22
0.38
0.27
0.85
10
2.44
0.47
2.58
1.36
3.04
3
2.11
0.34
1.81
1.32
3.18
10
0.61
0.11
0.55
0.40
0.75
8
2.35
0.42
1.90
1.60
3.00
11
      7.86
      0.78
      7.90
                                                                          50
                                                                          20
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA
                                 NA

-------
                                                                  PAGE 87
                   TABLE 5 (CONTINUED)
1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY  MEASUREMENTS
SURVEY /DATE DEPTH STATISTICS
SURVEY 5
AUG. 6 - AUG. 8
EPI MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
ME SO MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
HYPO MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
CHLA
CORR.
(UG/L)


1.47
0.05
1.45
1.40
1.53
12
0.65
0.17
0.69
0.40
0.92
4
-0.01
0.14
-0.11
-0.38
0.21
11
PHEO.
(UG/L)


0.81
0.14
0.60
0.43
1.78
12
1.65
0.30
1.90
1.31
2.00
4
2.68
0.54
2.76
0.93
3.46
11
TURBID
(NTU)


0.53
0.02
0.50
0.50
0.60
12
1.13
0.17
1.05
0.90
1.35
4
2.93
0,39
2.80
2.40
2.30
11
SECCHI
(METER)


8.40
0,00
8.40
8.40
8.40
1
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA

-------
                                  TABLE 5 (CONTINUED}
               1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY  MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                 CHLA
                 CORR.
                 (UG/L)
                                                   PHEO.
                                                  (UG/L)
TURBID
(NTU)
 SECCHI
(METER)
SURVEY 7
SEPT. 19 - SEPT.  21

                EP1
                ME SO
                HYPO
MEAN
STD. ERR.
MEDIAN
Qi
03
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N

MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
1.81
0.11
1.91
1.66
2.11
12
1.09
0.13
1.15
0.89
1.29
4
0.46
0.08
0.38
0.28
0.73
11
0.51
0.08
0.43
0.31
0.66
12
0,65
0.27
0.44
0.33
0.98
4
0.82
0.24
0.48
0.37
0.91
11
0.60
0.03
0.60
0.50
0.70
12
0.50
0.07
0.45
0.40
0.60
4
1.65
0.20
1.50
1.10
2.00
11
4.90
0.44
5.00
4.10
5.60
3
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
SURVEY 8
NOV. 12 - NOV. 15
                EPI
MEAN
STD. ERR.
fCDIAN
Ql
Q3
N
1.10
0.06
1.10
1.04
1.25
12
1.78
0.28
1.55
1.16
1.96
12
1.82
0.35
1.30
1.20
1.60
12
3.67
0.28
3.90
3.10
4.00
3

-------
                                                                                 PAGE 89
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN HATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                             NITRATE   AMMOMIA   KJELOAHL   SOLUBLE
                             NITRITE   NITROGEN  NITROGEN   SILICA
                             CUG/L)    (UG/L)      (UG/L)    (UG/L)
SURVEY I
MAY 15 - MAY 17
EPI







MEAN
STD. ERR.
MEDIAN
Ql
Q3
N


288.0
3.0
283.0
280.0
300.0
13


2.0
0.4
1.8
0.8
3.5
11


NA
NA
NA
NA
NA
NA


250.1
10.1
256.0
231.0
280.0
13
SURVEY 3
JULY 2 -
JULY 4
                EPI
                ME SO
                HYPO
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
185.8
4.3
182.5
178.0
194.0
8
237.8
11.0
233.0
210.0
270.5
8
315.9
3.9
319.0
305.0
321.0
11
5.7
0.9
4.8
3.6
7.6
8
16.8
3.6
13.3
8.9
27.2
8
8.8
1.5
7.4
4.6
11.5
11
227.5
45.4
215.0
135.0
275.0
8
195.0
17.1
185.0
170.0
205.0
8
319.1
145.7
180.0
60.0
230.0
11
243.1
15.6
242.5
222.5
280.0
8
210.6
19.9
202.5
170.0
247.5
8
553.2
39.4
550.0
475.0
670.0
11

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
                                                                                 PAGE 90
SURVEY  /DATE   DEPTH   STATISTICS
NITRATE   AMMOMIA   KJELDAHL   SOLUBLE
NITRITE   NITROGEH  NITROGEN   SILICA
(UG/L)    (UG/L)     (UG/L)    (UG/L)
SURVEY 5
AUG. 6 - AUG.8
                EPI
                ME SO
                HYPO
MEAN
STD. ERR.
MEDIAN
01
Q3
N
MEAN
STO. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
01
Q3
N
183.0
3.9
179.0
173.5
192.5
12
327.0
10.7
325.0
313.0
341.0
4
348.1
3.7
345.0
335.0
360.0
11
4.7
0.4
4.7
3.8
5.7
12
3.7
1.2
3.2
1.8
5.6
4
8.1
1.6
8.'
2.3
12.7
11
155.0
11.8
155.0
120.0
180.0
12
145.0
21.0
140.0
115.0
175.0
4
130.0
8.9
120.0
110.0
140.0
11
219.8
8.2
216.0
197.0
242.0
12
451.0
113.8
468.0
265.5
636.5
4
653,8
56.6
658.0
605.0
747.0
11

-------
                                                                                 PAGE 91
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY MEASUREMENTS
SURVEY  /DATE   DEPTH   STATISTICS
                            NITRATE   AMMOMIA   KJEtDAHl
                            NITRITE   NITROGEN  NITROGEN
                            (UG/U    (UG/L)     (UG/L)
                                                      SOLUBLE
                                                      SILICA
                                                      (UG/L)
SURVEY 7
SEPT. 19 - SEPT.  21
                EPI
                HYPO
              MEAN
              STD. ERR.
              MEDIAN
              Ql
              Q3
              N

              MEAN
              STD. ERR.
              MEDIAN
              Ql
              Q3
              N

              MEAN
              STD. ERR.
              MEDIAN
              01
              Q3
              N
                       174.3
                         3.5
                       172.0
                       168.0
                       174.0
                        12
                                      327.3
                                       34.6
                                      357.0
                                      289.0
                                      365.5
                       372.8
                         1.9
                       372.0
                       370.0
                       380.0
                        11
 6.5
 1.9
 4.6
 2.8
 7.2
12

 7.2
 5.0
 2.5
 1.8
12,6
 8.6
 2.9
 6.8
 3.2
 9.0
11
286.7
 35.0
320.0
180.0
370.0
  9
457.5
239.7
290.0
165.0
750.0
  4

184.1
 19.4
200.0
170.0
220.0
  9
365.8
 11.2
367.5
337.5
380.0
 12

 575.0
  44.2
 545.0
 512.5
 637.5
   4

 993.2
  48.0
 980.0
 900.0
1040.0
  11
SURVEY 8
NOV. 12 -
NOV.
15
 EPI
                        MEAN
                        STD. ERR,
                        MEDIAN
                        Ql
                        Q3
                        N
                            219
                              3
                            219.0
                            208,
                            221,
                             12
 14.7
  0.5
 14.9
 14.1
 16.1
 12
169.2
 27.6
150.0
115.0
190.0
 12
 555.8
  39.1
 543.0
 519.0
 628.5
  12

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN MATER QUALITY MEASUREMENTS
                                                                                 PAGE 92
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL     SOLUBLE      TOTAL
                  PHOSPHORUS  FILTERED   REACTIVE    CHLORIDE
                             PHOSPHORUS  PHOSPHORUS
                    (UG/L)     (UG/L)     (UG/L)      (MG/L)
SURVEY 1
MAY 15 - MAY 17
EPI MEAN
STD. ERR.
MEDIAN
Ql
03
N
SURVEY 3
JULY 2 - JULY 4
EPI MEAN
STO, ERR.
MEDIAN
Ql
Q3
N
ME SO MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
HYPO MEAN
STD. ERR.
MEDIAN
01
Q3
N


11.5
0.6
11.8
10.1
12.9
13


8.9
1.4
7.5
7.4
7.9
3
10.1
0.5
9.8
9.6
10.0
8
9.5
0.6
8.9
7.5
11.2
11


6.4
0.4
6.2
5.6
7.2
10


3.8
0.1
3.7
3.7
4.2
6
15.2
0.7
4.7
3.6
6.1
8
4.3
0.3
3.7
3.4
5.2
11


7.6
1.5
4.8
4.0
13.1
13


0.7
0.1
0.5
0.4
1.0
8
1.2
0.2
1.4
0.8
1.5
8
1.5
0.2
1.5
1.3
1.8
il


14.9
0.1
14.6
14.5
15.1
13


14.8
0.0
14.8
14.7
14.9
8
14.7
0.1
14.6
14.6
14.8
8
15.0
0.2
14.9
14.6
15.0
11

-------
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN WATER QUALITY  MEASUREMENTS
                                                                                 PAGE 93
SURVEY  /DATE
DEPTH  STATISTICS    TOTAL     TOTAL     SOLUBLE      TOTAL
                  PHOSPHORUS  FILTERED   REACTIVE    CHLORIDE
                             PHOSPHORUS  PHOSPHORUS
                    (UG/L)     (UG/L)     (UG/L)      (MG/L)
SURVEY 5
AUG. 6 - AUG.  8
                EPI
                ME SO
                HYPO
MEAN
STD, k'RR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
Ql
Q3
N
MEAN
STD. ERR.
MEDIAN
qi
Q3
N
9.9
1.2
9.0
8.1
9.8
12
8.8
0.5
9.0
8.3
9.4
4
9.4
0.3
8,9
8.6
10.5
11
2.9
0.4
2.6
1.7
3.5
12
2.6
1.3
2.1
0.6
4.7
4
3.2
0.5
3.1
1.9
4.2
11
0.6
0.1
0.5
0.4
0.8
12
0.8
0.1
0.8
0.6
0.9
4
1.3
0.1
1.1
1.0
1.8
11
                                                       15.1
                                                        0.1
                                                       15.0
                                                       15.0
                                                       15.1
                                                       12

                                                       16.2
                                                        1.3
                                                       14.9
                                                       14.9
                                                       17.5
                                                        4
                                                       15.
                                                        0.
                                                       15.
                                                       14.9
                                                       15.0
                                                       11
.0
.0
.0

-------
                                                                                 PAGE 94
SURVEY  /DATE
                                  TABLE 5 (CONTINUED)
               1985 EASTERN BASIN MEAN/MEDIAN WAT^S QUALITY MEASUREMENTS
DEPTH  STATISTICS    TOTAL     TOTAL     SOLUBLE      TOTAL
                  PHOSPHORUS  FILTERED   REACTIVE    CHLORIDE
                             PHOSPHORUS  PHOSPHORUS
                    (UG/L)     (UG/L)     (UG/L)      (MG/L)
SURVEY 7
SEPT. 19 - SEPT. 21
                EPI
                ME SO
                HYPO
        MEAN
        STD. ERR,
        MEDIAN
        Ql
        Q3
        N

        MEAN
        STD. ERR,
        MEDIAN
        01
        Q3
        N

        MEAN
        STD. ERR.
        MEDIAN
        Ql
        03
        N
 6.7
 0.2
 6.9
 6.3
                                        0
 9.4
 0.8
                                      9.
                                      8.
                                     11.
                                      8
 3.5
 0.2
 3.7
 3.0
 3.9
12

 4.5
 0.6
 4.5
 3.5
 5.5
 4

 5.0
 0.4
 5.0
 3.5
 6.5
11
 1.9
 1.0
 1.4
 0.3
 3.5
 4

 0.5
 0.0
 0,
 0.
 0,
 1

 I,
 0,
 0,
 0,
 2
10
                                  16.4
                                   0.5
                                  15.5
                                  15.4
                                  17,0
                                  12
17.3
 1.2
17.0
15.3
19.3
15.9
 0.3
15.4
15.1
16.8
11
SURVEY 8
NOV. 12 - NOV. 15
                EPI
        MEAN
        STO. ERR.
        MEDIAN
        Ql
        Q3
11.6
                                      0,
                                     11,
                                     10
                                     12,
                                     12
 6.3
 0.2
 6.3
 6.0
 6.6
12
 2.2
 0.1
 2.1
 1.9
 2.4
12
14.9
 0.1
14.9
14.7
15.0
12

-------
                                        TABLE 6

                      LAKE ERIE CENTRAL BASIN REPRESENTATIVE AREA
                      LIMNION, OXYGEN AND TEHPERATURE DATA, 1985*
                                                                                 PAGE 95
DATE
SUR   STRAT
L1HNION VOLUME HYPO AREA THICKNESS OXYGEN TEMP
        (km35    (kmZ)      (m)    (mg/1) CO
5/15-5/17 1 STRAT



6/12-6/13 2 STRAT



7/2-7/4 3 STRAT



7/24-7/25 4 STRAT



8/6-8/8 5 STRAT



8/28-8/29 6 STRAT



9/19-9/21 7 STRAT



EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
EPI
MESO
HYPO
TOTAL
64.8
8.8
39.3 4,680
112.9
99.0
5.2
8.8 3,670
113.0
92.9
9.1
10.5 4,200
112.5
87.0
6.0
19.5 4,760
112.5
98.6
6.9
6.4 3,560
111.9
100.1
4.3
7.6 4,000
112.0
107.0
2.0
2.4 2,000
111.4
13.5
1.9
8.4

20.6
1.2
2.4

19.3
1.9
2.5

18.1
1.3
4.1

20.5
1.5
1.8

20.8
1.0
1.9

22.3
0.8
1.2

12.3
12.2
11.9

10.0
8.8
8.3

9.2
7.3
5.6

9.0
6.3
4.1

8.7
5.8
1.8

8.3
3.3
0.2

8.5
3.4
3.6

10.7
9.0
7.5

14.8
10.8
9.2

18.4
14.0
11.7

21.7
17.5
13.6

22.0
18.6
14.1

22.4
18.8
15.6

21.0
17.0
17.4

11/12-11/15 8
      UNSTR.
 TOTAL  112.0
23.3
10.2  12.3
* THIS DATA HAS DERIVED FROM THE SURVEY 8 VOLUME WEIGHTING PROGRAM

-------
                                                                                 PAGE 96
                                        TABLE 7
                      LAKE ERIE EASTERN BASIN REPRESENTATIVE AREA
                      LIMMION,  OXYGEN AND TEMPERATURE DATA.  1985*
DATE
5/15-5/17
7/2-7/4



8/6-8/8



9/19-9/21



SUR STRAT LIMMION
1 UNSTR TOTAL
3 STRAT EPI
ME SO
HYPO
TOTAL
5 STRAT EPI
ME SO
HYPO
TOTAL
7 STRAT EPI
ME SO
HYPO
TOTAL
VOLUME HYPO AREA 1
(km3) Um2)
72.1
26,0
18,1
27.8 1,560
71.9
31.3
19.4
21.0 1,510
71.7
38.4
7.4
28.5 1,540
71.6
miCKNESS
M
45.9
16.6
11.5
17.8

19.9
12.4
13.9

24.4
4.7
16.7

OXYGEN
(mg/l )
13.1
9.5
10.2
10.4

8.8
8.9
10.0

8.3
6.6
7.8

TEMP
CO
4.3
18.2
10.1
4.7

21.6
12.6
5.2

20.5
13.8
6.0

11/12-11/15        8   UNSTR TOTAL    71.8      -       45.7     10.1   11.2
  THIS DATA MAS DERIVED FROM THE SURVEY 8 VOLUME WEIGHTING PROGRAM

-------
                                TABLE 8
                                                                         PAGE 97
              LAKE ERIE CENTRAL 8ASIM REPRESENTATIVE AREA
VOLUME WEIGHTED TOTAL PHOSPHORUS AND CORRECTED CHLOROPHYLL A DATA,
1985
DATE
5/15-5-17



6/12-6/13



7/2-7/4



7/24-7/25



8/6-8/8



8/28-^/29



9/19-9/21



11/12-11/15
SUR STRAT LIMN ION
1 STRAT EPI
MESO
HYPO
TOTAL
2 STRAT EPI
MESO
HYPO
TOTAL
3 STRAT EPI
MESQ
HYPO
TOTAL
4 STRAT EPI
MESO
HYPO
TOTAL
5 STRAT EPI
NESO
HYPO
TOTAL
6 STRAT EPI
MESO
HYPO
TOTAL
7 STRAT EPI
MESO
HYPO
TOTAL
8 UNSTR TOTAL
VOLUME TOTAL PHOSPHORUS
(km3) metric cone.
tons (ug/1)
64.8
8.8
39.3
112.9
99.0
5.2
8.8
113.0
92.9
9.1
10.5
112.5
87.0
6.0
19.5
112.5
98.6
6.9
6.4
111.9
100.1
4.3
7.6
112.0
107.0
2.0
2.4
111.4
112.0
645.6
82.9
399.3
1127.8
1098.5
79.4
163.2
1341 . 1
782.4
90.5
135.6
1008.5
827.7
57.6
250.6
1135.9
959.9
97.4
148.0
1205.3
1264.6
506.3
732.1
2503.0
1711.3
166.6
290.6
2168.5
2824.2
10.0
9.4
10.2
10.0
11.1
15.2
18.7
11.9
8.4
9.9
13.0
9.0
9.5
9.6
12.9
10.1
9.7
14.1
23.0
10.2
12.6
116.8
96.6
22.4
16.0
81.3
120.8
19.5
25.2
CORR CHL A
metric cone.
tons (ug/1)
152.6
20.6
80.9
254.1
102.3
5.0
12.6
119.9
121.6
7.8
8.5
137.9
192.9
12.6
29.9
235.4
281.5
14.3
20.0
315.8
261.1
4.0
3.5
268.6
639.5
6.2
9.0
654.7
550.1
2.4
2.3
2.0
2.3
1.0
1.0
1.4
1.1
1.3
0.9
0.8
1.2
2.2
2.1
1.5
2.1
2.8
2.1
3.1
2.8
2.6
0.9
0.5
2.4
6.0
3.0
3.7
5.9
5.0

-------
                                                                         PAGE 98
                                TABLE 9

              LAKE ERIE EASTERN BASIN REPRESENTATIVE AREA
VOLUME WEIGHTED TOTAL PHOSPHORUS AND CORRECTED CHLOROPHYLL A DATA,
1985
DATE
5/15-5/17
7/2-7/4



8/6-8/8



9/19-9/21



il/12-11/15
SUR STRAT LIMN ION
1 UNSTR TOTAL
3 STRAT EPI
MESO
HYPO
TOTAL
5 STRAT EPI
MESO
HYPO
TOTAL
7 STRAT EPI
MESO
HYPO
TOTAL
8 STRAT TOTAL
VOLUME
(km3)
72.1
26.0
18.1
27.8
71.9
31.3
19.4
21.0
71.7
38.4
7.4
25.8
71.6
71.8
TOTAL PHOSPHORUS
metric cone.
tons (ug/1)
837.0
212.2
1,'3.6
253.6
639.4
323.7
178.5
211.4
713.6
284.4
50.0
234.2
568.6
810.7
11.7
8.2
9.5
9.1
8.9
10.3
9.2
10.1
10.0
7.4
6.7
9.1
7.9
11.3
CORR. CHL.A
metric cone.
tons (ug/1 )
68.6
26.2
37.6
18.7
82.5
48.2
11.9
14.6
74.7
74.9
9.7
13.1
97.7
83.8
0.9
1.0
2.1
0.7
1.2
1.5
0.6
0.7
1.0
2.0
1.3
0.5
1.4
1.2

-------
                          TABLE 10
                                                                      PAGE 99
VARIABLE TEMP
MEAN
ST.DV.
STATION
32.0
78.0
31.0
30.0
38.0
37.0
36.0
73.0
42.0
43.0


*- S
* 3
* )
* 3
* )
* 3
* 3
* 3
* 3
* 3
* 3
18.3502
4.251
SMS
B
B
B
B
B
B
B
B
B
B
                                              VARIABLE
                                      TSS
                                   1.3332
                                   1.452
+*
( *
( *
( *
( *
( *
( *
( *
( *
{ *
( *
*_
*
*
*
*
*
*
*
*
*
*
S
3
)
3
3
3
3
3
3
3
3
S M
B
B
B
B
8
B
B
B
B
B
                                                              S
                                                  +*
                                                 [  *
                                                 (  *
                                                 [  *
                                                 [  *
                                                 [  *
                                                 [  *
                                                 [  *
                                                 [  *
                                                 I  *
                                                 f  *
           VARIABLE
ST.DV.
STATION *_
32
78
31
30
38
37
36
73
42
43
.0
.0
.0
.0
.0
.0
.0
.0
.0
.0
*
*
*
*
*
*
*
*
*
*
3
3
)
3
)
3
)
)
)
3
   CHLACORR
2.8772
                       B
                       B
                       B
                      B
                      B
VARIABLE     CORRTP
         12.3792
          6.090

(
(
(
(
(
(
(
(
(
(
$*
*
*
*
*
*
*
*
*
*

*
*
*
*
*
*
*
*
*
*
*
- S
3
3
3
)
)
)
)
)
3
3
S M
B
B
B
B
B
8
B
B
B
B
                                                                       +*
(
(
(
(
(
(
(
{
(
f
*
*
*
*
*
*
*
*
*
*
           VARIABLE
   NITNIT
STATION ,
32.0
78.0
31.0
30.0
38.0
37.0
36.0
73.0
42.0
43.0
"- S S M S S +*
3 B ( *
3 8 { *
3 B ( *
3 8 ( *
3 B { *
3 B { *
3 B ( *
) B ( *
3 B ( *
3 8 ( *

-------
                              TABLE 11
                                                                         PAGE 100
   MEAN
 ST.OV.

STATION
  63.0
  9.00
  10.0
  15.0
           VARIABLE
  MEAN
ST.OV.

STATION *-
  63.0  * )
  9.00  * )
  10.0  * )
  15.0  * )
TEMP
14.9702
6.945
M S
A
A
A
A



S
{
(
{
(



+*
*
*
*
*



*_
* }
* )
* )
* )
           VARIABLE
                         CHLACORR
                       1.2760
                       0.563

                        M    S    S
                        A
                       A
                        A
                        A
                        +*
                       ( *
                       ( *
                       ( *
                       ( *
VARIABLE


*- S S
* }
* )
* )
* )
VARIABLE


*- S S
* )
* )
* )
* )
TSS
1.2193
0.981
M S
A
A
A
A
CORRTP
9.5614
3.872
M S
A
A
A
A
                                                                        *
                                                                       ( *
                                                                       ( *
                                                                       ( *
                                                                       ( *
 +*
( *
( *
( *
( *
   MEAN
STD.DEV.

 STATION
   63.0
   9.00
   10.0
   15.0
VARIABLE     NITNIT
        213.2632
         45.543

 S    S    M    S
          A
           A
           A
                                    (  *
                                    (  *
                                    (  *

-------
                                                          PAGE 101
             TABLE 12

 QUALITY CONTROL SUMMARY FOR 1985
Difference Between Duplicate Samples
PARAMETER
TEMPERATURE
DISSOLVED OXYGEN
CONDUCTIVITY 25 "C
pH
ALKALINITY TOTAL
ALKALINITY
PHENOLPHTHALEIN
SECCHI
TURBIDITY
TOTAL SUSPENDED
SOLIDS
RESIDUAL SOLIDS
VOLITILE SOLIDS
CORR CHLOROPHYLL A
PHEOPHYTIN
PHOSPHORUS:
TOTAL PHOSPHORUS
TOTAL FILTERED
SOLUBLE REACTIVE
NITRATE + NITRITE
AMMONIA
SOLUBLE SILICA
CHLORIDE
UNITS
c
mg/1
umhos
SU
mg/1
mg/1
M
MTU
mg/1
mg/1
mg/1
ug/1
ug/1
ug/1
ug/1
ug/1
ug/i
ug/1
ug/1
mg/1
N
8
15
19
27
18
18
4
24
15
15
15
17
17
35
34
35
33
33
36
36
MEAN
.03
.12
1.84
.02
1.11
.56
.13
.18
.16
.21
.15
.40
.68
.32
.41
.28
1.24
.84
12.39
.08
STANDARD RANGE PERCENT OF SAMPLES
DEVIATION LIMIT WITHIN RANGE LIMIT
.02
.11
1.63
.02
.98
.50
.11
.16
.15
.18
.14
.35
.60
.29
.36
.25
1.10
.75
10.98
.69
.10
,39
6.02
.07
3.63
1.33
.41
.60
.53
.67
.50
1.30
2.22
1.06
1.33
.92
4.06
2.76
40.46
.26
100*
100*
100*
92.6*
94.4*
88.9*
100*
95.81
93.3*
93.3*
100*
94.1*
94.1*
97.1*
91.2*
97.1*
97.0*
93.9*
97.2*
91.7*

-------
                                        PAGE 102
FIGURES

-------
OCTROI!
                                                                                NEW YORK
                                                                  PENNSYLVANIA
                                    ClfVflAMO
                                                                        LAKE ERIE MAIN LAKE

                                                                        SAMPLING LOCATIONS
                                 OHIO
     Figure 1   1985 Lake  Erie Open Lake  Sampling  Locations
                                                                                                       75
                                                                                                       O
                                                                                                       Ul

-------





 
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            (After Reokhow, 1980)
                  Figure 2

-------
                                          PAGE 105
                                           a
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         FIGURE 5  MEDIAN CENTRAL BASIN EPILIMNION TEMPERATURE,  1965
a
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-------
                                              PAGE 108
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                                                         PAGE 110
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                                                      PAGE 111
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-------
                                            PAGE 112

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-------
                                           PAGE 113
                                   s
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-------
p

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45
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as
3.0
2.5
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1.5
1.0
0.5
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             lES TO li DATA FWM NBA. 1MB
             10W TO 1885 DATA BW RDM. #WOK  IN HC9S
                                                   kjj
       1825 1930 1935  1940  1945 1950  1955  I960 1965 1970  1975 1980 1985
   FIGURE 12  MEAN CENTRAL  BASIN HYPOLIMNION CORRECTED OXYGEN DEPLETION
               RATES FROM  1029 THROUGH 1965

-------
12. 5r
12. 0[
11.5
11.8
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-------
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                                              PAGE 116
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-------
                                                    PAGE 117
                                            
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-------
                                                                    PAGE 118
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 75
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    FIGURE 18  MEDIAN CENTRAL BASIN TOTAL PHOSPHORUS CONCENTRATIONS
               FOR 1985

-------
                                                                  PAGE 119
HI
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     OTUTM.
 71
 a
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        JWKAY,nHJULAUC9B>OCTYOE
    FIGURE 17  PERCENT COMPOSITION OF PARTIOJLATE AND TOTAL DISSOLVED
               PHOSPHORUS IN CENTRAL BASIN,  1085

-------
                                                                       PAGE 120
2
24
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     121
     111
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          OTOTM.F1LTBB3P
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         FIGURE 18  THE MEDIAN CENTRAL BASIN EPILINNION AND HYPOUMN10N TOTAL
                    PHOSPHORUC,  TOTAL FILTERED PHOSPHORUS AND SOLUBLE REACTIVE
                    PHOSPHORUS CONCENTRATIONS FOR 1865

-------
                                                                       PAGE 121
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         FIGURE 18  CENTRAL BASIN LIMNION DISTRIBUTION OF TOTAL PHOSPHORUS IN
                    METRIC TONS AND PERCENT FOR 1985

-------
                                                                        PAGE  122
S
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         FIGURE n  MEDIAN EASTERN BASIN TOTAL PHOSPHORUS CONCENTRATIONS
                    FOR 1065

-------
                                                                    PAGE 123
It
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 3
 2
 1
 I
                      B-
-H-
                            *
OTDPTM. FH.1B0P
       APtmYJJU.AIJCSB>QCTHOVDEC
    FIGURE 21  THE MEDIAN EASTERN BASIN EPILIMNIQN AND HYPOLIHNION TOTAL
               PHOSPHORUS, TOTAL FILTERED PHOSPHORUS AND SOLUBLE REACTIVE
               PHOSPHORUS CONCENTRATIONS  FOR 1985

-------
                                                               PAGE 124
m
a
11
      OMLMB itwww
71
21
11
OTOTM. (H3BCLVHJ MWHWt
       Ml    MY   XM   JL   MS
                                     OCT   MOV
   FIGURE 22  PERCENT COMPOSITION OF PARTICULAR AND TOTAL DISSOLVED
              PHOSPHORUS IN EASTERN BASIN, 1885

-------
                                                                  PAGE 125
     VOJMOON
19
              Uliult
     OMNKA
                >**=*
ur
     OHTTIWTt
        APRNAYJIKJULAUC3B'QCTWVDB:
    FIGURE 23  THE MEDIAN CENTRAL BASIN EPIUMNION AND HYPOLINNION
               NITRATE AND NITRITE, AMMONIA AND KJELQAM. NITROGEN
               CONCENTRATIONS FOR 1985

-------
                                                                        PAGE  126
     131

     !
  0 KTTWUE + KTIRITE
( mmam
             M    NAYJMJI.    AUC    9B>    OCT    HOY    DEC
5    m

     19
             APRYJUHJULAUC3BOCTMtWDEC
         FIGURE 24  THE MEOIAM EASTERN BASIN EPILIHNION AND HYPQUHNHM
                    NITRATE AND NITRITE  AMNONIA AND KJELDAHL NITROGEN
                    CONCENTRATIONS FOR 1965

-------
                                                             PAGE 127
   MtNAYJHJULME^QCTNOVOB
FIGURE 25  THE MEDIAN CENTRAL BASIN EPIUHNIQN AND HYPOLINNION
           SOURf REACTIVE SILICA CONCENTRATIONS FOR 1085

-------
                                                               PASE 128
    AffiKAYJUJULAUGSffOCTNOVOEC
    AffiWYJUHJULAU63B>OCTNDVDB:
FIGURE 26  HE MEDIAN EASTERN BASIN EPIUNNION AND HYPOLIHNION
           SOLUBLE REACTIVE SILICA CONCENTRATIONS FOR 1965

-------
                                                      DISSOLVED OXYGEN
      APR    MAY    JUN     JUL    AUG    SEP    QCT     NOV    DEC
13
12
11
10
9
8
7
9
5
4
3
2
1
0
FIGURE 27  MEDIAN CENTRAL BASIN HYPOLIMNION NITRATE AND NITRITE
           OJG/U, AMMONIA CUG/U  AND DISSOLVED OXYGEN 
-------
           CONCENTRATION  OC/U
                                                 PAGE 130
m  
-------
                                                                PAGE 131
7.!
7.1
fl.!
fl.1
1!
11
1!
41
I!
II
2,!
2.1
1.!
LI
L!
LI
Bier*.
         MAY
                   JUN   JU.    MJC    9B>   OCT   HOY   DE
7.5
7.1
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11
4!
41
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2.1
L!
Li
i.:
LI
wmuwoi
onm.
ovcunif
AOUBOWU.A
            
        APRMYJIKJU.AUC9B'OCTNDVDEC
    FIGURE 29 THE MEDIAN CENTRAL BASIN EPILINNIQN AND HYPOLINNION TOTAL
              SUSPENDED SOLIDS QC/U.  VOLATILE SOLIDS OCA),  AND
              CHLOROPHYLL A CUGA).  CONCENTRATIONS FOR 1965

-------
'
LI
i;
I!
L;
     GJ TTJTM. 3UBPBOBJ 3DLDB
      WUTH 30LHB
        tfRIMYJIMJILMBSB>OCTNaVflB:
      D TOTAL SUDIE) 90UD8
      O WUTILE SDLUB
     FIGURE 31  THE MEDIAN EASTERN BASIN EPILIMNION AND HYPOLIMNION TOTAL
                SUSPENDED SOLIDS  OCA). VOLATILE SOLIDS OC/U.  AND
                CHLOROPHYLL A  0/y, CONCENTRATIONS FOR 1085

-------
                                                            PAGE  133
                                              0
 oxiesnm. scum
   tfKNAYJUNJULMJCaffOCTNOYQEC
                                  '">
9
II
 I
 BXWUTH90UD5
 e j
FIGURE 31  PERCENT COMTOSITION OF VQUTIUE AN) RESIDUAL SOLIDS
          CENTRAL BASIN,  1885

-------
                                                              PAGE 134
    mumm
    BS VOLATILE OJOi

     S WOUM. 80UOB
If
 I
    mfOJKIM
71
                        o
21

II

 I
    of voumi
    OS
   FIGURE 32  PERCENT COMPOSITION OF VOLATILE AND RESIDUAL SOLIDS
             EASTERN BASIN.  1085

-------
                                                                  PAGE 135
271
271
274
272
271
264
<-*'
       noMJUcnvm
       OOUMQE
       Ml   mi    JW   JUL   MB
ncr    NW    nc
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271
271
274
272
271
       BomcnvnY
       eotaan
             MY    XM   XL   MB
QCT    NOV    DEC
   FIGURE 33  THE MEDIAN CENTRAL BASIN EPIUNNION AND HYPOLIMNION
              CONDUCTIVITY AND CHLORIDE CONCENTRATIONS FOR 1085

-------
                                                                    PAGE 136
                                                              mi
284
        m   my " jw   ju.   MB
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274
272
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                    111
                    141
                    HI
                    12.1
                    1LI
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    FIGURE 34  THE MEDIAN EASTERN BASIN EPILIMNION AND HYPOLIMNION
              CMUCTIVnY AND CHLORIDE CONCENTRATIONS FOR 1985

-------
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VARIAtlt  HtlHKE* ......
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-------
                                         PAGE 139
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 HYHRA85 TPPIF  ST Cl. VS AS ftfID
  t TPDIF    t
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NUMBER DF DISTIMCT VLUFS  .
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157
372
47
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N
t
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PERCENTS
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      FIGURE 38   STATISTICAL SUMMARY  OF THE COMPUTED  DIFFERENCE BETWEEN
                   PAIRED STANNOUS CHLORIDE  (SC)  AND ASCORBIC ACID (AA)
                   TOTAL PHOSPHORUS

-------
S NEU (FAIRED CASF5)  TF AND 1FP t?V Ml tlftTA
                                                                                    PAGE 141
 MCTFP *
*mt*tt*ssi
NAXIHUN 14.699999R
YAR1A8LF. MIIHDF.K 	 4 MIN1HU* 0.3000000
HUWFR OF DISTINCT MfttUFS , 49 RRH6E 14,39*9994
N1II1BER OT VrtllOS ClillilTtn. . 103 VARIANCE 13. 053K70
NUMBER OF VALUES NOT milNTF.D 316 ST. HEM. 1.6179791
LOCATION FSFIHAfES ST.ERRBR
HiAN 6,3S?J3i 033599?S
HFDlftN 4,0f*99 4.4J)10t?f

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  FIGURE 39  STATISTICAL SUHMARY OF THE STANNOUS CHLORIDE  (SC)
             TOTAL FILTERED  PHOSPHORUS DATA USED FOR THE METHOD COWARISON

-------
                                                                                         PAGE  142
MYDMBS NEli  i
MSSIliStHt
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LOCATION FSTIHATES ST. ERROR
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-------
                                                         PAGE 143
*  h
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GO    (D    ^T     CM
                                                            01
                                                          15

                      NOI1VHXN33N03

-------
MYDRAB3 TPOIF AMB TFPDIF P2B ALL DAT*
                                                                                         PAGE  144
* TFFBtF *
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HMIKUH
1 NIJIlHUft
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NUHIER DF DISTINCT VALUES . 41 RAN8E 6.9000001
NUHKR OF VALUES COUNTED, . 102 VftRIAHCI 1,7097346
NUHKR OF VALUES NOT COUNTED 317 ST.IEM. 1. 307373*
(Q1-UD/2 1.0000000
LOCATION ESTIMATES ST .ERROR
HEM) 0.7401960 0.12*44*3
MEDIAN 0.8000000 0.1134701
ItQDC
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      FIGURE 42  STATISTICAL SUMMARY OF THE COMPUTED  DIFFERENCE BETWEEN
                 PAIRED STANNOUS CHLORIDE (SC) AND ASCORBIC ACID (AA)
                 TOTAL  FILTERED PHOSPHORUS

-------
                                       PASE 145
APPENDIX A

-------
 NTMMS M.L 0*1* CDITtM MSI*
                                                                                                                          PAGE  146
  mtntitm

UMIMLC MIMIC!	
NIMH!  or oifiNCT v*iur  .
NUMM  OF VM.UC* OUNTIil,  .
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PERCENT! KtCfNTS
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0.4
1.9
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9.3
8.4
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t. toooo
10. 00000
10.10000
10.20000
10,30000
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11.00000
COUNT CELL CUM
7 2
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10 3
 2
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10 3
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3
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3
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4
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7
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30.4
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42.1
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70.2
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73.7
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11.10000
11.20000
11.30*00
11.40000
11.70000
11.80000
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12.00000
12.10008
12,28080
12. 30000
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13,00090
13,30000
13.16000
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2 0.
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NtMMS 4U. CmilSt CINTtM. MilN






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PAGE  147
iMtir
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ItltHKT VALUC!


mmifi or VALUES r.antnrt. .
12

lot
MUM* Or V*UitS NOT COUNTED 7


LKATtM


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4,200 1 .3
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0.7
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10.200
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11.700
12.00C
13.200
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12.300
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12,706
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11.100
11.290
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14.000
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1
t
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-------
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                   CMTMi MS IN
                                                                                  PAGE  149
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 HTMMJ ALL CKUISC CEKIItM. HAS1N
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                                                                                                                           PAGE   159
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-------
                                        PAGE 162
APPENDIX B

-------
NYMMS M.L Rmiisn KMTCKN
                                                                                              PAGE  163
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                                                                                                                 PAGE  164
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                                                                                                                   PAGE  165
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-------
                                                                                                                         PAGE  166
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-------
                                                                                            PAGE 169
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-------
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CUH
17.7
*.:
7.J
f .1
100.0

-------
                                                                                                                            PAGE  178
 HTMM3 *U DAT* EASTERN BdSIh
  mtifttnit
  I PH       I
VMtTAW.e Minuet ......
mMICF OF DISTINCT VAlL'E3 .
Ui1iU> (IF VM.UES CflllHTED, ,
mmteR or WM.KS MOT COUHTEJ
                                              MX I HUH
                                              It IN MIDI
 43
tos
                            t,3*ooeo4
                            5. .M*'
                            1.110900S
             VM'MICC
             ST.lfV,
             (BJ-UtI/2
                                     7.?!S?83
                                     7.nc:>wo3
                                    MOT UH1BUC
 *i'H  -,
 'S'SE'ilS
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                                                                                                      i^HHHM
                                                                                                   H  HHHNH
                                                                                                   '-' .1HO"E
                                                                                           VfiUJs
                                                                                            o,:t
                                                                                           : ,oi>
                                                                                                      BtLOU
yftl.U*
7.JSO
7. no
7,400
7,440
7.470
7,;*o
7.570
7 . AOO
7.41C
7.435
7,i40
7.450
76?9
7,708
7,730
7.730
COUNT
2
1
t
\
1
*
1
3
1
3
t
5
4
2
1
1.
CELL
1.9
O.f
 ,t
0.?
o.
0.?
o.
Q,^
0.?
l.S
9.9
4.;
1,1
1.1
o,
i.t
CUM
t.
3.8
,?
1.7
4,4
7,5
I.S
,4
10.4
U,3
i.*2
7.?
1.7
1.4
4,5
4.
7.740
7.7
7.7*0
7.770
7,780
7,7f9
7,SJO
7.H59
7,840
7 aw
;, wo
7,1*0
7 0
7,flO
7,3
1 .
1 9.V
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: i,
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3 .
4 3.
! il, 
'i 4.7
2 ),
3 4.7
: i.t
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51. 
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>a.r
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?
7
?












,94
,;o
,n
.J30
.0*0
,100
.170
> 1 10
.300
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.300
,J10
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,330
! 0,
1 0
l a.
l 0
I ft.
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1 0
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I 1
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2 1
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                                                                                                                    0  01C 3
S 
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H S ft
I H
SO
J


i.jr,(> i (i.<
3.180 1 0,
,3i J :.i
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, ? t.
.130 " 1.
,440 1 0,
,450 i g.
.4d s ;.
.410 1 ,
.500 t .
, ?2I> I ! ,
fl."!0 ' l.
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79
?<)
13
14
SS
7
BS
!-
93
n
94

9<
' 100
4 ^
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.9
,?
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_ ^
. }
 1
.

-------
APPENDIX C

-------
                                                                     iOU
                                               EFI
THE SEASONAL PATTERN OF EPILIMNION CORRECTED CHLORQPHVLL a (ug/l)
IN THE CENTRAL AND .EASTERN BASINS OF LAKE ERIE DURING 198f.

-------
                                                                rmac.  J.O1
                                                 CRUISE 8

                                                 Novwnbw 12-18

                                                 EP1
THE SEASONAL PATTERN OF EPILIMNION CORRECTED CHLOROPHYLL  a  (ug/1)
IN THE CENTRAL AND EASTERN BASINS OF LAKE ERIE DURING  198f.

-------
THE SEASONAL PATTERN OF HYPQLIfWiQN THICKNESS (m) IN THE
CENTRAL AND EASTERN BASINS OF LAKE ERIE DURING 1986,

-------
                                                CRUISE 1
                                                My 13-17
                                                HYPO
                                                CRUISE S
                                                August 8-3
                                                HYPO
                                                CRUISE 7
                                                Scptwn&w 19-21
                                                HYPO
THE SEASONAL PATTERN OF HYPOLIMNION DISSOLVED OXYGEN  (mg/1)  IN
THE CENTRAL AND EASTERN BASINS OF LAKE  ERIE  DURING 1986.

-------
                                              CRUISE 1

                                              May 18-17

                                              HYPO
                                              CHUISE 3

                                              July 2-4

                                              HYPO
THE SEASONAL EPILIHNION AND HYPOLIMNION TOTAL PHOSPHORUS (ug/1)
DISTRIBUTION PATTERNS FOR THE CENTRAL AND EASTERN BASINS OF
LAKE ERIE DURING 1986.

-------
                                            cauise r
                                            Sptmbr 19-21
                                            EPI
                                           CHUISE 7
                                           3ptwnbr 18-21
                                           HYPO
THE SEASONAL EPILIHNION AND HYPOLIMNION TOTAL PHOSPHORUS (ug/1)
DISTRIBUTION PATTERNS FOR THE  CENTRAL AND EASTERN BASINS OF"
LAKE ERIE DURING  1986.

-------
                                                      12-15
                                               EP1
THE SEASONAL EPILIMNION AND HYPOLIMNION TOTAL PHOSPHORUS (ug/1)
DISTRIBUTION PATTERNS FOR THE CENTRAL AND EASTERN BASINS OF
LAKE ERIE DURING 1986.

-------
                                                     CRUISE 1
                                                     My 18-17
                                                     HYPO
                                                     eauisi a
                                                     July 2-4
                                                     HYPO
THE SEASONAL EPILIMNION AND HYPOL1MNION TEMPERATURE (C)  PATTERNS
FOR THE CENTRAL AND EASTERN BASINS OF LAKE  ERIE DURING 1986.

-------
                                                CRUISE S
                                                August 8-8
                                                HYPO
                                                 CRUISS 7
                                                 Sptni6*r 19-21
                                                 EPI
                                                 CSUtag 7
                                                 3ptmbr 19-21
                                                 HYPO
THE SEASONAL  EPILIMNION AND HYPOLIMNION TEMPERATURE (C) PATTERNS
FOR THE CENTRAL  AND EASTERN BASINS OF  LAKE  ERIE  DURING 1986.

-------
                                               CRUISE 8
                                               Novwnbw 12-18
                                               EPI
THE SEASONAL EPILIMNION AND HYPOLIWION TEMPERATURE  (C) PATTERNS
FOR THE CENTRAL AND EASTERN BASINS OF LAKE ERIE DURING 1986.

-------
                                          PAGE 190
APPENDIX D

-------
                                                                    PAGE  191
     Appendix D contains the  BMDP  statistical   computer  outputs  for  the
quality control data.   The data 1n the BMDP outputs were  generated through a
CLEAR computer program (CALDIF) containing the following  options.
OPTION 1

     Option 1 calculates the absolute difference (ABS)  between splits  (Xll.
X12, X21. X22) using the following formula:

          A8S(X11 - X12) AND ABS(X21 - X22)


Option I was used on all parameters having split measurements.
OPTION 2

     Option 2 calculates the absolute difference  (ABS)   between  replicates
(XI, X2) using the following formula.

                ABSCX1 - X2)


Option 2 was used on all parameters which had replicates but no splits.


See the quality control section for the explanation for the terms split  and
replicate.

-------
                                                                                                       PAGE 192
       2 WTRICNTS
  ita*tti
  * Tin?     
  it*itt*tt**
MIMIC*  OF 1ISTWCT UMJIF! ,
NUm  (IF MUKS CPWTKO. .
MMICR  or WM.UCI urn  COUNTED
         ESTfMTCS
                                                          0.9WWO
                                           sr.irv.
                                                                                                                 COUNT IS
HIM 9.0:30000 O.OHJS4J
HIM** a.OOO'WW 0 ,0-,'SS73
HS&E 0.0000000
EACH



viiur
SKIIWCSS l,0
KUHTOilS -.*
EACH
SO * 5
* ft 3 *

H
M

L*
U

VM.Uf/l>f .
1.2S
-9.5S
 .  ma 



H
H
o.oioo
O.JOOC
0.1300
ni fi.oooo;-;
03 O.OSOCOC
s- -o.o'i;".
st <>.iS7i:*-.
0.0010

n

                     rencEKTS                       meant
             KBIIKT  rai.l.   nW(      KW (If    CIKWT  CEI I.   RUB
      0.00000     t  77.0  70,0       0.10000     2  73.0 100.0

-------
                                                                                                              PAGE  193
 HPT tOM I
  M**IUtM*
  t SECCHI   1
  tltftmmtt
NUHUI! Of DISTINCT VM.UCS .
WIMKt flf VAUIM r,8UNfF0. .
*UMl Of MUSS HOT C91WTFB
                   HEAD
                   KF.t
                   mtf
                                              MX1WH
                                              NfMINUH
                                                              0.1000000
                                                              O.lOOfOOO
                                       VARIANCE

                                       /3

                                            ST.fRROS
                                                              J. Of ODOOO
                                                                                                                        countcsi
                              fr.lJSOOOO
                              .iiM>e
                              0.1000000
                                                                                                                   U

                                                                                                                    o.otoo
                                                                                                                    0.0*00
                                                                                                                    O.Z200




5
-





1
K
N

SXEIWISS
KUHTOSIS

B
II 3

i- o.iooooc:
VM.M *tUF/S.f. 03- 0.150090''
I.M o,82 s- a.o?:co''"
-J.2S -.5! S+ 8.17500f
EH -.' iruon  o.ooto
s
t N

        r.o(ir
0.10060     I
                     tn.t
                     7J.O
                            nun
VM.UR    MIUT  CIl.L   CUH
 0.10000     1  73.0 1M.O

-------
                                                                                                            PAGE  194
 OPTION :
                                             MXIMIM
VMIMI.C miHttt .,
wmm or minuet
Ut!t W VW.IIfS CDIIHTfft.  .
MMKK Of VALUES MOT  C3UHTE3
                   WMI
                   WO I OK
                   HIDE
 4
 5
13
 5
MHOi
VARIANCE
ST.WU,
(l.noonnoo
0.4000000
0.9174-^86
0,132(1173
O.I 000000
   0.1:00000
   4,1000000
   0,0000000
     ST.tKftOR
      0.^3403*7
      O.OS77J81
H
H
HH
HM
HH H H
HH H H
                                                                                                                   -II
                                                                                            EACH '-'
                                                                                          'MLUF
                                                                                           8.73
                                                                                                                   0.0500
                                                                                                                   5.0000
                                                                                                                   4.*500
                                                                                                                 in-
                                                                                                                 02-
      0.00000
      0.100CO









5 0
 n
w

HKCEHTS



H
ft
I




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*
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IT r.fu. KUB VM.nt I'.fttiKf
*
4
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2
J


t
S


PEKCEMTS
KEl.t CUH
13.3 RO.O
11.1 M.3
KUKTOSIS

S
*



"111 lit CtMIHT
0.40000 1

-,75 -4.
EACH .' ici.au

n
t

RKNTI
nfi.i. nun VALUE
A. 7 100.0

!
B





1


                                                                                      4.^00000
                                                                                     -O.OirOl--
                                                                                      .25201?
                                                                                                                   0.0050
                                                                                                            cmrnr  u.

-------
                                                                                                             PAGE  195
 WT1B* I  MTRlCMTt
  mxtttimi
   TP       
  (UMIIHttt

VWtlMie WINUI!  ......
HUMCR or KST met muss .
NUNICK (IF ijAiuts  cnimttn. .
*UKR OF VALUES  NAT CWJKTED
         NMIMHt
                                             !M-ai;/2
         CtTUMTCS
                   ItCDIAM
                   noes
0.3?!S71      0.05WW*
O.JOfWWO      (l,0?a*7!
C.I 000000
 H
 H
 HH
 m
 HH
 HH   KM
 MH HHHH H      H
L	(|
                                                                                  EWH  'H'
                                                                        IKEWIItS
                                                                        KURTOS1S
                                                                                           EACH  '-' StQ"f 
                                                                                                         (.
                                                                                                         U
                                                     VALUE
                                                       l.W         .33
                                                                                           EACH  ',' 1E(.OH
                                                                              O.'.OOO
                                                                              s.oooo
                                                                              I.4000
                                                                                                                       O.JOOOOOC
                                                                                                                03.
                                                                                                                S-"
s
M
M

B
B
E




9
I
H
*
N
a 5
j 





PERCENT* PEHCEHT*

105
W
too
ntidr
t
13
f

Ss
J7,
IS,
i. cyH
.t ?.T
. I 4*S . 9
.7 45.7




MUlf CODHT CTl.t
0,4$&dd 2 3,7
O.TOMO J 1.7
0.40OTO 3 *.i
Run
?!,*
7?, I
0. 7






H
X

PIKCFOTS PI
vw.iw r.(Mwi m i
i>.7orf>C' 3 i.*
.fOOO 1 2,
).*OPO[i | ?,?
e:y
4.3
W.I
:ofi.O
VAi.UC COUNT rn



                                                                                                                  O.CJM
                                                                                                                   PESCENTS

-------
                                                                                                             PAGE  196
 OPT1DH t  miTHIENTS
  mttsntn*
VMUMLF
WMIC* OF DISTINCT UMUFS  .
NtMW* Of VM.IKS CgyjITU.  ,
       or VALUES NOT  COUNTO
                   MEAN
                   IWOIMI
                   HOSE
 I
12
34
ItnttmjN
1M*6E
VMIANCf
ST.Dfw.
2.5000000
O.MOOOOO
2.3900000
                                                             O.ISOWM
   o.?oaao
   0.2040000
                 HT.EItM*
                  O.f*!f.*3
                  0.97TO475
                                                                         9KEHMEIS
                                                                         KUKTHSIS
                                                          2. 58
                                                          ..35
                                                                                             EMM
HHHHH
 ' AAOV

HH
E "
t
u
.13
H
0

1
S-.

.5000
.0000
nioo
0.
0.
-0.


100080',1
4000'>"
1:035;"
S II
 I
M
H
1
1
0 S
H t
A
H

1C
                      WKXMT3
     U*l llf    COUNT  CFl I    CUD
      0.48606     1   2.   3.
      9.100M     t  :*.3  !f.<
      o.:oooo    it  s:.<  ti.t
                    FtRCFHIS
   VMI1E    KMIMT  CFtl   CUR
    0.30000     3   ',.1  *7.
    1.oooo     ]   .fl  T*,;
    0.50000     ?   3,*  ?.*
                                r.niwT  cm i
                         . 60000     I   J.T
                                                                                     J.f  91.?
                                                       PERCENT;
                                       tfAUIB     CMHT   Cfll.   HUH
                                        l.SOOOO      ;   7.9  4.l
                                        '. .70009      t   3.9  *7.l
                                        2.50000      I   7.9  100.'1

-------
                                                                                                              PAGE  197
 OPTION
  t Sf
VMIAKE MIHKft ......
MNIIER Of IISUNCT VM.UM .
NUNICtt OF VM.IItft nOUNTfl. .
       OF VALUES WIT COUNTED
 4
 t
3!
 3
                                              HkXIHUM
                                              H1KIKUK
                                                              0.0000000
MARI.1NCE
ST.WV.
                                                              0.' 0000 00
LMAT10N MT1HMES
                   HI AN
                   NEDtAN
                   KOBE
   9.2121571
   o.jooonoo
   0.0090000
                                                    0.134MU
                                                                                 H
                                                                                 H
                                                                                 H
                                                                                 H
                                                                                 H
                                                                                 H
                                                                                 H
                                                                                 HN
                                                                                 HHH
                                                                                                                             3
                                                                                                                        COUHTif;
                                                                          3KIHKESS
                                                                          KURTOSIS
                                                                                              EARN  '-'
                                              VM.UT

                                              14,

                                                EACH
                                                                       12. or:
                                                                       Jt.74
                                                                                                                    8.0000
                                                                                                                    4. 800'5
                                                                                                                  m>    o.ooooooo
                                                                                                                  83
                                                                                                                  $-   -
              cnuxr
      0.00004    U
      0.10400     N
   i   a
   H It 3N
...I.t..F...
   N t  *
     I  M

  PERCENT!
 eru   cu*
 4S.7  45.7
 21. f  M.4
o.:ooo
0.4.1000
        .*
        2.*
                          nun
                         77.1
                         l,0
        PMCfHIS                        CE*T5
CI1UNT  CELL   CUh      VW.UE    COUNT  CELL   fUM
    4  11,4  fl.4       O.flOft**     I   ?.t  7.i
    1   7.?  f4,3       4.70400     1   2-' 100.0

-------
                                                                                                              PAGE  198
 ems*
  isttiiitnti
  I K1TN11    t
  tMItttttttl
VMIMI.C
MIHICT OF DISTINCT VALUES  .
MHtKX Of VALUES nWHTKB.  ,
NUMM* Of VALUfS HOT  COUHTtB
 5
 5
35
 7
                                             MITMUM
                                             KIHIIHIN
                                                             0.0030100
LBMTIflfl
                   HfXIM
                   DOM
VARIANCE
5T.KV,
(B3-UD/J
   1.2474242
   I ,
-------
                                                                                                              PAGE  199
 OPTION 1  NUTRIENTS
  ttfttittMM
  I KM      
  ItttUtlMtt
                                             MX (HUM
NUH*E* or (tinner  VM.UTS
HUHFR OF VALUES
HUNK* or *LK *T
                             4
                            I?
                            33
LOCATION miMTES
n*i iir
0.000000
     0.190000
                   IV. 'IAN
                      KXCEHT9
     0.300000
f.fu.
24.2
!!.!
 J.O
 euH
34.2
27,J
43,;
57,4
tO.t
                        RMMf
                        VARIANCE
                        JT.JW.
                                                  Sr.EMOk
                                                   .SIlf?20
                                                   O.HS176J
                                                                         M
                                                                         N
                                                                         H
                                                                         H
                                                                         H
                                                                         H
                                                                         HH
                                                                         HHHHH
                                                                                                                  Eflf.H  'H'
                                                                                                                       CCUNTISS
                                    0.3000000








300 S
M N n 4
HP A
I N
CH '-' MOVE * fl.7'09
i 0.0000
U* I2.0000
8l t
VAUlf MM.UF/S.F, 3 0
SKEtWEiS 3.8* . S- -3
MffiTosii is,i 18.40 :* r
EACH '.' IFLOII - 0.1809

H
X




,0100000
,?
-------
                                                                                                           PAGE  200
OPTION
 rtittttistti
 I SIS      t
 tttiittmtii
         MUHHi  ......        7
WINK* or DISTINCT  wiuit  >       17
NUHIt* or VftLlIM tmiHTKB.  .       34
       OF VALUES HflT COUNTfB       4
                                            MM! NUN
                                            NtNINUN
                                            MNBE
                                            VMIANCt
                                            ST.DFM.
                                            (oi-ui>/;
                                                           30.0000000
                                                            S.TSMOOfl
                                                 ST.fRKCIK
                  (WAN             i:.3B8B3
                  MCDIM           10.000WOO
                  IWOE              o.ooooooo
                                                                                               N
                                                                                               H
                                                                                               H
                                                                                               MM
                                                                                               HHM
                                                                                                                     tauntcf
                                                                                       fftCM '-'  0VE  *
                                                                                                    L
                                                                                                    u
                                                                                                                  'I
                                                                                                                 s.eooo
                                                                                                                 fl.8800
                                                                                                                 W. WO 4
                                                                       SKEUHE5S
                                                                       KUKTOJIS
                                                                                      1.23
                                                                                      1.S3
                                                                                                 WW.UF/S.F,
                                                                                                       ],9J
                                                                                                                83
                                                                                                                  s.aocwc
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                                                                                                                  1.1:0?:;-
1
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X
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      4.     I
      f.     I
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                 9  11.f  55.6
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                                         15.
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ttU,
 3.1

 8.3
 1.6
 ;.*
                                                          run
                                                         7-5.0
                                                         77.
                                                                   VW.UB
is.
27.
1ft.
COUNT
    i

    1
    t
    1
cn.t   r.m
 :.i  no.*
 3.4  M.I
 2.8  M.
 !.  H.7
 2.9  *.*
                                           KiCtHTS
                          VMM    COUNT  CCI I.   >UH
                               3*.     I   J.O  f7.?
                               19.     I   J. (90.0

-------
                                                                                                            PAGE  201
 OPTION 2  NUTRIENTS
   CNLMOMI i
  ItOIlllIlK

VMfMtE NWUK	
NUHIEK OF DISTINCT U*l IIIS  .
NUNIKK IW VM.IIE!) CBUHTFt,  .
       OF VM.UU NOT  rOUMTFD
           HMIHUft
 S
IS
I?
HANK
VARIANCE
ST.KU.
(OJ-UD/S
1. 400(1000
0.9000100
1.4000000
0. IBM? 34
                                                            1.Z730008
UlCftTIflH f.5T!fiTEf
                   BF nun
                   HODE
                                                  ST.ERffit
                                                   0.1"30H3
   o.ooe
  NOT IINIOUf
                                                                     H
                                                                     H
                                                                     K
                                                                     HM

                                                                     HMHHHH
                                                                                                                      COUNT!S)
E*M
VALUE
SKEVNCIS i.H
KOTTOSIS 1.3?
EACH
SI (1
-B1W II 3 
N D *
I N
'- MVE 
L
U
WAi.ur'S.E.
2.12
1.14
'. KLOU *

O.l'OO
0.0000
S.?-50
03> o.;oooo
$ 0.8?41J5
O.C150
h
X
                                                     Ktcmti
u*iue
 0.0000
T  CELL   CUN
 :  ti.i  U.B
 t   S.f  17.4
 t   S.f  ?3.3
    0.1:000
    9.20409
    0.2ZOOO
    0.1)000
                                             court
                                                 t
                                                 1
                                                 2
                                                 t
                  f.fl I
                   r,,t
       II. I
        5.?
              CUK
             S3.J
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       MAI.1IC
        0.I2WMI
        A.32000
                                                                     H.750CO
    mcFNis
   CFU    CUN
I   S.f   M.7
1   3.V   74.4
1   S.f   74.5
                HICEilTS
VAIUC    COUNT   CEIL   f.UK
 0.87000     1   S.f  11,2
 O.AMftO     t   ^.?  *1.1
             I   S.f )00.n

-------
                                                                                                            PAGE  202
 ornm : MITRIEHTI
  mumttti
   KO     I
  mtlSHMtt

VMMILE MMKR	
HUME* OF HSriHCT  VMUCS  .
m*ICT Or IMI.tlF 5 nlWHTfn.  ,
MIME* 3f VALUES NOT  CDUKTFD
IS
17
 I
         SST1IWTES
                   HEAN
                   *!**
                   HOTC
IMXIHUIt
MIHIHUH
MH8C
VMI^NCE
sr.oru.
                                                             1.93*1141
                 ST.FRKOS
                  .!
                  I). 2
H
H
H
H
N
H
H
HH
NN M
HHNH
tftCH
                                    8.0100000
                                                                                                                 -u

                                                                                                                   0.1000
                                                                                                                   0,0100
                                                                                                                   4.5400
                                                                         KUkTOSIS
                                                         VM!F
                                                          J.J5
                                                                                                  'MMIt/S.E,
                                                                                                        3.7




s

0
NiH It
*  
t I
 }
N
S
4




PERCENT 5 HKENTS
*I.Ut
o.aooooo
0.311000
0.050000
0.970090
COUNT
I
I
I
\
cm.
S.f
S.
S.t
3.
CUD
s?
U.8
17,^
M.S
VMUC
O.OIOOGO
*.fM
0.220000
O..IHi>00
mum
i
3
1
1
eeii cw
?. 5
13,4 7
5. 32
S,f !>
.4
a
,9

VftUlF filWKT
o.s^owo i
o.atioo i
O.WOOO I
1.3290W) 1

KRCrMTS
r.n i CUM
5,9 *4,7
S.9 ?.
S. 7*. 5
3, '',*


H
X

Vl IIF 1
1
I


. J40000
.'.ittOOO
aj
-------
                                                                                                            PAGE  203
  1 IIS
1MR1MI.C WNIKR ,  .  ,  ,  .
mmnx of DISTINCT WMUCS
NUNKR OF MLICS ROIINrm.
HUNK* Or VM.UEI OT
 7
13
i!
 5
IMXIMVM
NINtmiN
Mfttt
MRIMWE
                                                              .1NSI!?
inr.ftTTTO fsmMis
                   KitId*
                   mttE
                                                  ST,E**e

                                                   1,034*411
                                                                      H
                                                                      H
                                                                      H
                                                                      M  H
                                                                      H  NX
                                                                      MHHNH
                                   HOT






1 B
HI * ft 3
M  
I *


VAUUC
IKCHICSS 1.37
KURT05IS 1.20
etCM
1
*


L
u
VULUr/S.F,
2*4A
,ts
-.' IFLOM *

H
I

                                                                                                                   O.O'iOO

                                                                                                                   t.nsoo
                                                                                                                 ai
                                                                                                                 03>
                                                                                                                 5
                                                                                                                 S+.
                                                                                      O.IMCOO

                                                                                      .35125*-

                                                                                  0,0073
                      KMCNTt
     WI.IH    COMKT  Cll.1    M
     0.010000     2  U.3   13.J
                  1   A,7   ?,$
                  t   .7   ;.?
     4.070090     2  13,1   40.0
            OIUMT  Cftt   CUR
   0.0*0000     t   ...7   4*.7
   .130900     S   4.7   SS.J
   0.140000     1   *,?   M.
   D.IMOM     1   *.7   *,T
                       VM.ut    r.nunT
                       9,7W     i
                       <>,W900     1
                       0.2509*0     1
                       A.S*00     i
 recf*Ts
MU.   BUH
 t.7  7S.3
 4.7
 4.7
*I.UC    ffOUNT  TEI I.   C'JK
0.
-------
                                                                                                             PAGE  204
        2 NUTKICNTS
  MMnllttt*
  I VI       t
  tlf(ttlt

VMIAH.E WMICII ......
MMKK OF BISttNCl 0000
                                                              o.otcftnoo
                                                                                                                        COUNT'S)
kOf.*TttlH (EITIHATES
                                                   ST.FMOK
                   NIBIM
                   NOSE
                                    NOT UNIQUE
                                                                                      H
                                                                                      H H      H

                                                                                     I	II
                                                                                                           t
                                                                                                           U
                                                                                                                    9, MOO
                                                                                                                    9.0300
                                                                          >KtlWSS
                                                                          KUKTOSIS
                                                                                       i.IT
                                                                                      -o.r.
                                                                                              EACH  '.'  IfLOM 
                                                                                                                    0.0030
9
-

a
i

H
I
 $
H J 
ft
H
H
I
     VAUlf
      O.OJOOO
      9.9SW9
   Cfll    f,\
1   *.7    t,7
2  U,S   .0
2  13.3   SS. S
VMUF,    tOUHt  CELL   CUM
 . 07000     t   *.7  49.0
 D.1000C     1   A.?  4*.?
 0.11000     t   k.7  33,J
        COUNT  cert   HUN
            I   6.7  *0,0
O.lflOOO     1   *,?  M,7
0.71000     1   *.7  71.J
UAtUE    COUNT
 t.ZiMO     I
 O..TIOOO     ;
 0.41000     1
 KRCtMTS
ceui.   CUM
 0,7  40.0
11.3  M.3
 .7 100,0

-------
                                                                                                             PAGE  205
 WHO* 2 NUTHItMTS
  miittims
  t us       i
         mmtr.it ......
HUME* Of IISTINCT UM.UGS .
NuniER of UIIIFS eMMTtA. ,
HUNK)! Of VALUES HOT COUNTED
11
i:
 3
HININUN
*H6f
IMRtMICi
ST.BF'J.
O.ifOOOOO
0.0100000
0.410(1000
O.OS40U4
0.232403*
0.1OOOOO
LOCATION CilTtlMTCt
                   HIM
                   HE DIM
                   BODE
   ,20*4000
   9,0700000
  NOT IMIOUE
                                                   ST.tRROd
                                                   0.04000*^
H
H
H
H
H
H
H  H
H NHHH
 EACH -H-
KEPIFSEMT"
     1
 COUHT(5>
                                                                         SKCHNESS
                                                                                             EACH '-' flWWE 
                                                                 VM.Uf/I.F<
                                                                       i.n
                                                                      a. i*
                                                                                                                    0.07SS
                                                                                                                    O.BOOO
                                                                                                                    0,?5C
                                                                                            1.11
                                                                                           -o.ti
                                                                                                                  01-
                                                                                                                  93
                                                                                                                  S-.
                                                                           0.03000C
                                                                           .3200
                                                                          -O.OJS403
                                                                           B.43S:
                                                                                             CKH
                                                                                                                    O.C075


s


H 1
N
N
1
I
ft
*
H
PERCENT!
VMM
0.010000
0.020000
O.OIOMO
0.070000
tOtlHT
1
}
1
2
CEl.l.
.7
13. J
4.7
11.3
r.uh
4.7
74.0
2*.7
40.0
0
0.129000
0.44000
O.M4000
I:OIIHT
t
1
1
1
CFI.L
ft. 7
A. 7
4.7
4.7
CUD
73,3
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tl.J
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0.4fOOO



                                                                                                                    CELL   CUH
                                                                                                                     *.T 100.0

-------
                                                                                                               PAGE  206
 OPTIIM i
  mt*m
  > rumtn   t
  >SItttft
VMIMtC
HUME* Or IISTINCT VALUE! .
NUKRCft (IF VM.UFS r.llUHTfn. .
       Or VALUES MT COUDTEI
 t
 t
34
14
                                              HIM I NUN
                                                              2.00MAOO
                                                              Q.OOf/0000
                                              ST.MV.
k

                                                             EACH   MLQM         O.CCJO
                                                                                                                           0,3000f
                                                                                                                          -0.2217
                                                                                                                           0.58B37
s
-



B
N

N


H

n
I
B S
HJ +

A
N

(1

1

                 PEICENTS
Mt HE    CmwT  CEIL   RUH      Wl lit
 .0000       37,S  37.5       0.20000
 O.l9     *  JJ.J  7.       H.JM)ftO
                                                      I'.FLI.    CUM
                                                      .7   117.5
                                                       4.3   1.7
                                                     re* emit
                                   MM .DC     lO'.IHT   fFI I    r.UH
                                    0.360*0      I    4.2   tS.I
                                                 i    4.5  to,o
                                                                                                                       KRCENTS
                                                                                                                      CSI.L   tun

-------
                                                                                                          PAGE  207
 OPTION 1  NUTRIENTS
  t cowcoMt  i
  ntiitisttit

VM1MU NIHMER  ..,,,
       w KSTIUCT vw.nes
       nr UAI IIKS
       or VALUES NOT
17
21
   MMIIWH
   (KM I MM
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                           S,fl00
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3.006000C
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                                                                                           EACH
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                   21.1
                   10. S
                                  KOHWT
                                     J
                                                  KRCEMTS
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                                                                 VMM    r.otmf  KILL   cun

-------
                                                                                                              PAGE  208
 Of TtCI!< 1 KUTItEMTl
  imtmtsts
  I CL       I
  *tttttl
VMIMLC MimCR ......       10
WINtER Of DISTINCT VMUCS .        S
mjniKi? OF DmtiKS COUNTED. ,       34
WM1EK V VALUES MT COUNfCD       4
lOMflON ESTIMATES
                                        MAXIMIHI
                                        HIMIWItt
                                        MMf
                                        VARIANCE
                                        IT.Bf").
                                         (OI-1D/2

                                             St.
                                                             g.sooooco
                                                             0.050DOOO
                                                             S.1JS43K
                                                             .95(KMSO
                   HEM
                   MLBUN
                   H01E
                                                                                H
                                                                                H
                                                                                M
                                                                                MM
                                                                                HH
                                                                                HH
                                                                                MH
                                                                                                                        COUHTIS)
                                                                                     H H H
                                     0,0000005
                                                                                             EftCH  - fiHOVf 
                                                                                                                    O.MtO
                                                                         SKEUNE3S
                                                                         KWTSSIS
                                                                                      VM.UE
                                                                                       3.13
                                                                                       J.3S

                                                                                        EACH
                                                                                                                  ti*
                                                                                                                  B3
                                                                                                                  S
UMtlt    COUNT
 O.MD60    21
 0.11040    f.
r.tl.l
St.Z
M.4
                            RUM
                           St. 3
                           M.f
        coum
            i
1.4MOO     I
 mcnt<
ntu.   cu
 2.1  1.7
 a.*  t.4
UMW    CfflINT
 4.00000     J
 KKtHTS
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 !.(. \0.0
                                                                                                    .lt000'
                                                                                                   -o.os/sstt
                                                                                                    O.J1J22"
                                                                                                    (tt,ui    cowrr  CFI L   CUH

-------
                                                                                                                PAGE  209
 OPT I OH 2 NUTRICNTl
  uisisttiit*
   M.KTOT   <
  M*tl*t*l

VMIMLC MWKI! .,..,,
NUHKR Of IISTINCT VALUES .
mmiER OF vaults cmmTED. ,
MUHIER Or VALUES NOT COUNTEB
                   HC*M
                   NEOIM
                   HODt
                                                         3.30000(12
                                                         o.ooonooo
                                                         3.3000002
                             IB
                              2
VMIANCE
5T.HFV.
coa-ois/2
                                                              J,M*3U
                                                              0.1000KOO
                                                   St.KdROR
                                1.1111112
                                l.OOOOIMO
                                t.0000000
                                                                     H
                                                                     H
                                                                     H
                                                                     H
                                                                     M
                                                                     M
                                                                    HH
                                                                    HM
                                                                    MH H
                                                                    WHHH
                                                                                                                             1
                                                                                                                         COl)NT(E)
                                                                                                                     -U
                                                                                              CflCM '-' WOWS
                                                                          SKEIMfSS
                                                                          KUDTOSIS
                                                                                            vault
                                                                                             2.43
                                                                                              EMM
                                                                                                            L--
                                                                                                            U
                                                                                                          4.21
                                                                                                                0.3100
                                                                                                                0.0000
                                                                                                                4,9000
                                                                                                                     0,9000000
                                                                                                                     l.OOOOOOC
                                                                                                                    -0.07S3402
                                                                                                                     0.0500
a
i

a t
N H +
0 
I H
H
X
VMIIC    rniiNr
  0.0000     *
  o.oooo     i
                      FERCENTS
                     cti.i.   I:IM
                     22.2  29.2
                      :>.*  27.1
MiM IIS    UDUIIT
  0.9000     2
  t.0400     7
        fERCEHIS
       I'.PU.   CUB
       11.1  .?
       31. f  77.8
VM.1K    UMKt
  1.30OO     1
  1,8000     2
 PERCENT?
KCI.L   CUM
 3.*  13,3
II. t  V4.4
        PERCENTS
count  CCI.L   CUH
    I   3i 100.0

-------
                                                                                                         PASE  210
 of no* :
  I MLKM     I
  miiisim*

VMIOM.E mmmt
MIMKft OF  DIStlHCT
mrnnn or  wmties CMMTH. .
*Hf* tf  VALUES MT COUNTED
                  MEDtM
                  NO DC
 2
 I
II
 2
IMlXIKWt
NfMlMUM
IMMf
VARIANCE
ST.JfV,
J.SWW
   ft,5*11112
   ,0
-------
                                                                                                          PAGE  211
 Of T 7 ON 1  MimCNTS
  ftMIIlSSltt

VMIMIE WIXIF.Ft  ,,,,,,
HOMER OF HSTZNCr VN.UCI ,
       Df WIIIEI cmmri-a. .
       OF VM.UM NOT COURTED
 2
 t
J7
11
        MIIHUM
        HI MI RUN
        MNW
        MMIMICE
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Wf.ftTION *S1IHATtS
                  MCAN
                  MUM
                  NODE
   0,0211111
   .tiN>0
   .0000000
                                                  8.M4J4W
                H
                H
                HH
                HH     H
                HH     H
                HH K H H
                MN M H X
                MM H H N
                                                                                                                     COUNT<)
                                                                                           EiWH  '-' AMHW 
                                                                                                        L
                                                                                                        U
                                                                       WEWCW
                                                                       KlttTMIS
                                                                                         VM.UT
                                                                                          1.2C
                                                                                           CWM
                                                                                                      1.55
          s a
                                                                                0.0050
                                                                                O.dOOO


                                                                              ni    o.oojoov

                                                                              |-   -4.M1477'


                                                                                9.0008
     o.oooooo
     O.Ol'IOOO
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WH.UC    cmwiT
o.omw     3
.AMIM)     J
                   mcnn
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                   tl.l  74.1
VALUC    CMMT
o.oooo     s
S.MO0<)     2
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ecu   rue
IB.S  ;,*
 7.4 1M.4
                                                                                                  MUK    COIMT  CCLI.

-------