United States
Environmental Protection
Agency
Municipal Environmental Research
Laboratory
Cincinnati OH 45268
EPA-600-2 79-011
June 1979
Research and Development
&EPA
Removal of Lagoon
Effluent Suspended
Solids by a
Slow-Rock Filter
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RESEARCH REPORTING SERIES
Research reports of the Office of Research and Development, U.S. Environmental
Protection Agency, have been grouped into nine series. These nine broad cate-
gories were established to facilitate further deveJopment and application of en-
vironmental technology. Elimination of traditional grouping was consciously
planned to foster technology transfer and a maximum interface in related fields.
The nine series are:
1. Environmental Health Effects Research
2. Environmental Protection Technology
3. Ecological Research
4. Environmental Monitoring
5. Socioeconomic Environmental Studies
6. Scientific and Technical Assessment Reports (STAR)
7. Interagency Energy-Environment Research and Development
8. "Special" Reports
9. Miscellaneous Reports
This report has been assigned to the ENVIRONMENTAL PROTECTION TECH-
NOLOGY series. This series describes research performed to develop and dem-
onstrate instrumentation, equipment, and methodology to repair or prevent en-
vironmental degradation from point and non-point sources of pollution. This work
provides the new or improved technology required for the control and treatment
of pollution-sources to meet environmental quality standards.
This document is available to the public through the National Technical Informa-
tion Service, Springfield, Virginia 22161.
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EPA-600/2-79-011
June 1979
REMOVAL OF LAGOON EFFLUENT SUSPENDED
SOLIDS BY A SLOW-ROCK FILTER
by
Walter J. O'Brien
and
Ross E. McKinney
Department of Civil Engineering
University of Kansas
Lawrence, Kansas 66045
Contract No. 68-03-0280
Project Officer
Ronald F. Lewis
Wastewater Research Division
Municipal Environmental Research Laboratory
Cincinnati, Ohio 45268
MUNICIPAL ENVIRONMENTAL RESEARCH LABORATORY
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
CINCINNATI, OHIO 45268
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DISCLAIMER
This report has been reviewed by the Municipal Environmental Research
Laboratory, U.S. Environmental Protection Agency, and approved for publica-
tion. Approval does not signify that the contents necessarily reflect the
views and policies of the U.S. Environmental Protection Agency, nor does
mention of trade names or commercial products constitute endorsement or
recommendation for use.
ii
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FOREWORD
The Environmental Protection Agency was created because of increasing
public and government concern about the dangers of pollution to the health and
welfare of the American people. The complexity of the environment and the
interplay between its components require a concentrated and integrated attack
on the problem.
Research and development is that necessary first step in problem solution
and it involves defining the problem, measuring its impact, and searching for
solutions. The Municipal Environmental Research Laboratory develops new and
improved technology and systems for the prevention, treatment, and management
of wastewater and solid and hazardous waste pollutant discharges from munici-
pal and community, sources, for the preservation and treatment of public
drinking water supplies, and to minimize the adverse economic, social, health,
and aesthetic effects of pollution. This publication is one of the products
of that research; a most vital communications link between the researcher and
the user community-
As part of these activities, this research report was prepared to make
available to the sanitary engineering community data on the design and opera-
ting characteristics of rock filters for removing suspended solids from the
effluent of a municipal wastewater lagoon.
Francis T. Mayo, Director
Municipal Environmental Research
Laboratory
iii
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ABSTRACT
Data on the effectiveness of a field scale pilot plant employing rock
filters for the removal of suspended solids from the effluent of the faculta-
tive wastewater lagoon system at Eudora, Kansas, were examined for a 16 month
period. Two rock filters were evaluated, one using Corp of Engineer ballast
rock, 4.7 to 25.4 mm, and the other using standard filter rock, 9.5 to
50.8 mm.
The three cell, facutlative lagoon treating Eudora municipal wastewaters
was operated at 55 per cent of its hydraulic design capacity and had an aver-
age fluid retention time of 246 days. The effluent from Cell 3 showed an
average of 60 mg/1 suspended solids, 21 mg/1 suspended BOD,., 3.8 mg/1 soluble
BOD, 3.0 mg/1 NH4+-N, 3.3 mg/1 total P, 10.7 mg/1 dissolved oxygen and a pH
of 8.5. These data indicated good stabilization of the municipal wastewater
contaminants with algal recycling of nutrients. The high effluent suspended
solids were created primarily by algae recycling treated nutrients. While
the effluent contained considerable suspended solids, the reduction of N and
P was significant.
Both rock filters dropped the suspended solids to an average of 32 to
35 mg/1. Variations in hydraulic loading rates up to 2978 1/m /day did not
have any effect on the effluent suspended solids concentrations, but the small
rock filter clogged after 11 months operation, indicating the need for larger
rock media.
The removal of suspended solids within the rock filters resulted in a
definite dissolved oxygen drop through the filters from biological metabolsim.
In the warm summer period there was not enough dissolved oxygen in the rock
filter influent to meet the oxygen demand and anaerobic conditions were pro-
duced in the rock filters. In the cold winter period the increased dissolved
oxygen was adequate to keep the system aerobic. Biological activity remained
high during the winter months.
The results of this study indicated that rock filters could not produce
an effluent quality that would meet the EPA effluent criteria of 30 mg/1
suspended solids even though there was a definite reduction in suspended
solids.
This report was submitted in fulfillment of Contract No. 68-03-0280 by
the University of Kansas under the sponsorship of the U.S. Environmental
Protection Agency. This report covers a period from June 19, 1973 to
October 31, 1975, and work was completed as of October 1978.
iv
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CONTENTS
Foreword • •
Abstract iv
Figures vi
Tables vii
Acknowledgment viii
1. Introduction 1
2. Conclusions 6
3. Recommendations 7
4. Experimental Facilities 8
5. Experimental Program 15
Eudora Lagoon Effluent 16
Rock Filter Influent 19
Large Rock Filter 20
Small Rock Filter , .. 29
Chlorophyll and Algae 33
6. Discussion of Results 39
References 42
Appendices 43
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FIGURES
Number Page
1 Schematic diagram of facultative lagoon operation ... 2
2 Schematic diagram of wind mixing in facultative lagoons 2
3 Schematic diagram of the Eudora lagoon system and the
experimental filter 9
4 Schematic diagram of the pilot rock filter lagoon 9
5 Media used in the large rock filter 11
6 Media used in the small rock filter 11
7 Centerwall and rock filters during construction 13
8 Rock filters looking from effluent end towards the influent
end during construction 13
9 A cross section of the rock filters 14
10 Influent and effluent suspended solids from the large rock
filter system 23
11 Total BOD5 data for the large rock filter system 25
12 Soluble COD data for the large rock filter system 26
13 Dissolved oxygen data for the large rock filter system 27
14 Ammonium nitrogen data for the large rock filter system 28
15 Suspended solids small rock filter 30
16 Total BOD- small rock filter 31
17 Ammonium nitrogen data for the small rock filter system 32
18 Suspended solids removed in rock filters ... * 40
19 BOD removed in rock filters 40
vi
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TABLES
Number Page
1 Size Gradation of the Rock Used in the Two Field Scale Filters . . 10
2 Monthly Averages of Cell 3 Effluent 17
3 Monthly Averages From Cell 3 18
4 Monthly Average Chemical Characteristics 20
5 Hydraulic Loadings and Detention Times in Each Filter System ... 21
6 Dissolved Oxygen Concentrations Across Large Rock Filter 24
7 Dissolved Oxygen Concentrations Across Small Rock Filter 33
8 Chlorophyll A Through Rock Filter System 34
9 Predominant Algae in Cell 3 Effluent 35
10 Predominant Algae in Rock Filter Influent . . 35
11 Predominant Algae in Large Rock Filter Effluent 36
12 Predominant Algae in Small Rock Filter Effluent 36
13 Total Alkalinity Through Rock Filter Lagoon System 37
vii
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ACKNOWLEDGMENTS
The cooperation of the City of Eudora, and most especially Mr. John W.
Pinnick, Superintendent of Utilities, is gratefully acknowledged.
The number of graduate and undergraduate students who worked on the pro-
ject is too large to make individual recognition feasible. Despite this,
they have out heartfelt thanks for their tireless performance.
The assistance of Mrs. Kathleen Boyd throughout the entire project is
also gratefully acknowledged. The assistance of Ms. Molly Van Vleck in the
final preparation of this report is gratefully acknowledged.
viii
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SECTION 1
INTRODUCTION
Facultative lagoons have been widely used for the treatment of waste-
waters from small communities, subdivisions, shopping centers and isolated
industrial plants as well as for individual residences. The popularity of
lagoons has been based upon relatively low first costs, low operational and
maintenance costs and high standards of reliability in stabilizing the bio-
degradable organics in raw wastewaters. For the most part, lagoons have
been used where large land areas were readily available and where skilled
operating personnel were not readily available. In addition to facultative
lagoons, aerated lagoons and anaerobic lagoons have also been used for waste-
water treatment. Needless to say, all three types of wastewater lagoons have
their own specific characteristics.
Facultative lagoons are the most widespread of the three types of lagoons
and can be characterized as being large, shallow, holding ponds that retain
the wastewaters for 90 to 120 or more days. Facultative lagoons work best on
relatively dilute organic wastewaters and produce a high degree of treatment
as far as stabilization of the biodegradable organics are concerned. Aerated
lagoons utilize some form of mechanical surface aeration or diffused aeration
to increase the rate of oxygen transfer and reduce the aeration time down to
between 1 and 20 days. Aerated lagoons do an excellent job of stabilizing the
biodegradable organics but tend to produce considerable quantities of sus-
pended solids that must settle in the aerated lagoon or in a separate treat-
ment system. Anaerobic lagoons tend to be deep lagoons, 3 to 6 meters
(10 to 20 ft), with a relatively short retention period, 3 to 6 days. Anaero-
bic lagoons work best on strong industrial wastes that contain high proteins
and produce up to 80 per cent BOD5 reduction. It is normal to follow anaero-
bic lagoons with either aerated lagoons or facultative lagoons or a combina-
tion of both to produce a high quality effluent.
THEORY OF FACULTATIVE LAGOONS
Removal of contaminants from wastewaters depends upon both physical
and biological phenomena. Figure 1 is a schematec diagram of a typical
facultative lagoon. As shown in Figure 1, the heavy suspended solids in the
incoming wastewaters tend to settle out near the wastewater inlet since the
velocity of flow in the lagoon is not sufficient to keep them in suspension.
The suspended solids in normal municipal wastewaters consist of inorganics
and organics with the organic fraction having both a biodegradable fraction
and a non-biodegradable fraction. The inorganic and the non-biodegradable
volatile suspended solids that settle out in the lagoon simply accumulate on
the bottom. The large surface area of facultative lagoons permits the inert
suspended solids to accumulate for many years before filling the lagoon.
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•CH/T
6 « «
INFLUENT
ALGAE
BACTERIA
SOLIDS
FIGURE 1. SCHEMATIC DIAGRAM OF FACULTATIVE LAGOON OPERATION,
Wi
FIGURE 2, SCHEMATIC DIAGRAM OF WIND MIXING IN FACULTATIVE LAGOONS,
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The biodegradable fraction of the settled suspended solids undergoes
anaerobic degradation by various groups of bacteria. Facultative, acidform-
ing bacteria metabolise the readily degradable suspended solids with the
formation of soluble organics, primarily short change volatile acids, which
slowly diffuse into the liquid surrounding the solids. If acid formation is
rapid, the pH of the liquid immediately around the suspended solids can drop
to a point where further metabolism ceases. In effect, the organic suspended
solids which settled out are pickled by the organic acids. Wind action
across the surface of the facultative lagoon causes the water to circulate
around the lagoon, as shown in Figure 2. As the water moves across the sur-
face of the settled suspended solids, some of the soluble organics diffuse
into the moving layer. With time the methane bacteria slowly start to grow
in the anaerobic environment within the settled sludge layer. They convert
the organic acids to methane and carbon dioxide which tend to form gas
bubbles which are released from the lagoon into the atmosphere. Part of the
carbon dioxide produced by metabolism reacts with ammonia released during
the metabolism of proteins to form ammonium becarbonate which acts as a
buffer to maintain proper pH levels, around pH 7, for good bacterial meta-
bolism. The loss of gas from the lagoon and the formation of ammonium
bicarbonate are important reactions affecting the operation of the faculta-
tive lagoon.
The soluble, biodegradable organics in the incoming wastewaters, as well
as the soluble organics released from the settled suspended solids, are
metabolised by facultative bacteria to form new bacterial cells. The overall
reaction is one of conversion of soluble organic matter to suspended organics
in the form of cellular protoplasm. If dissolved oxygen is available to the
bacteria, the metabolic reactions will be aerobic with approximately 2/3 of
the biodegradable organics being converted to bacterial mass in the form of
volatile suspended solids and 1/3 of the organics being oxidized for energy
to produce the new cells. Aside from new protoplasm, the major end products
of the metabolic reactions are carbon dioxide and water with some ammonium
ions being released from protein degradation. The ammonium ions react with
water and carbon dioxide to form ammonium bicarbonate.
The bacterial protoplasm formed is not a stable material but rather
undergoes endogenous respiration, using oxygen and producing carbon dioxide,
water, ammonia and an inert, cell residue as end products. Thus, the
bacteria grow up and die with the contaminants in the wastewaters being re-
moved rather quickly to form new cells and the stable end products being
slowly released as the cells age. In addition td the facultative bacteria
which metabolise the organics in the wastewater, tfrere is also a group of
bacteria which can oxidize the ammonium ions to nitrate ions. The nitrifying
bacteria are strict aerobics and use carbon dioxide rather than organic mat-
ter as their source of carbon for their protoplasm.
When adequate oxygen is not available for aerobic metabolism, the facul-
tative bacteria simply shift to anaerobic metabolism. Unfortunately, the
end products of anaerobic metabolism are primarily organic acids, aldehydes,
ketones and alcohols. These organic end products still contain much of the
energy from the original organics being metabolised. The net result is less
bacterial cell mass being produced and less overall stabilization.
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Sulfate reducing bacteria find the anaerobic conditions suitable for
growth and obtain the energy they need by oxidizing the organic matter with
sulfates as their electron acceptor. Sulfates are reduced to sulfides which
can build up to produce nusiance odors. If the wastewaters contain iron, the
iron will react with the sulfides to produce a black, insoluble precipitate.
The precipitation of the sulfides helps reduce the odor potential but also
reduces the light penetration into the lagoon until the precipitate settles
out. Overall, anaerobic metabolism does not produce a high quality effluent
and only the reaction of methane bacteria in the settled sludge layer pro-
duces reasonable removal of organic matter under anaerobic conditions.
Although bacteria stabilize the organics contained in wastewaters, other
microorganisms also grow in facultative lagoons. The most important group of
microorganisms outside of bacteria are algae which utilize inorganic nutrients
and sunlight to provide the necessary reactants for creating new algae cells.
Sunlight provides the energy needed to convert the inorganic elements into
organic matter as algae protoplasm. Thus, soluble inorganics compounds are
converted to insoluble organic suspended solids. Algae produce cellular
protoplasm similar to bacterial protoplasm as far as overall chemical compo-
sition is concerned. Like bacteria algae also undergo endogenous respira-
tion with the use of oxygen to produce carbon dioxide, watert ammonium ions
and inert cell mass. In the presence of light the endogenous end products
are quickly converted back to new cell mass with little loss. Synthesis of
new protoplasm makes it appear that the algae are not undergoing endogenous
respiration when they actually are. The turnover of nutrients results in
the slow accumulation of inert, dead algae mass which has no definite form
except for the algae which have hard shells. At night the algae do not have
light energy for synthesis, making endogenous respiration the primary reac-
tion with continuous release of end products to the water around the algae.
Some of the carbon dioxide may be lost from the lagoon surface at night but
much of it is retained as bicarbonates. When daylight returns, the algae
begin to metabolise the inorganic nutrients released by endogenous respira-
tion at night. The net effect is reuse of most of the nutrients on a contin-
uous basis.
Algae would create a serious problem if it were not for the fact that
oxygen is a major end product of metabolism. As carbon dioxide and water are
converted to cellular protoplasm. Most of the oxygen is released as molecu-
lar oxygen which diffuses out into the lagoon where it can be used by the
bacteria for aerobic metabolism of the organics. Unfortunately, some of the
oxygen released can be lost from the lagoon surface as a result of wind
action. Supersaturation of the surface layer of the lagoon with oxygen is
quite common with heavy algae growths. Removal of carbon dioxide and water
by algae results in an increase in hydroxyl ions which react with the remain-
ing bicarbonate ions to produce carbonates and raise the pH. The pH in
lagoons with active algae metabolism can easily rise to 9.5 or higher. The
high pH levels produced by algae metabolism tends to slow overall microbial
reactions but does not stop metabolism.
Higher microorganisms such as protozoa, rotifers and crustaceans find
the aerobic environment in the lagoons suitable for growth. These animals
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are able to use the bacteria and the algae as food and grow in direct pro-
portion to their ability to obtain nutrients. Bacteria utilization tends to
keep the bacteria population to a minimum but algae utilization is much more
selective. The small, non-motile algae form an excellent source of nutrients
for the microscopic animals; but the larger algae, the motile algae and the
spinelike algae are not readily metabolised by the microscopic animals. Un-
metabolised algae, dead algae, living and dead bacteria, protozoa, crusta-
ceans and wastewater colloidal solids form the mass of suspended solids that
persists beyond the immediate vicinity of the inlet to the lagoon. Since
these tiny suspended solids settle slowly and are easily kept in suspension
by wind action across the surface of the lagoon, it is not surprising that
the lagoon effluent contains a high concentration of suspended solids.
The EPA criteria for secondary effluents from municipal wastewater
treatment plants specifies that suspended solids and BOD5 shall not exceed
30 mg/1 on a 30 day average with 45 mg/1 on a 7 day average. Unfortunately,
the growth of algae results in high suspended solids during the warm summer
months which exceeds the EPA effluent criteria. As a net result, considerable
research has been carried out over the past 15 years to determine the best
method for removing suspended solids from lagoon effluents. One of the most
comprehensive reviews of various methods that have been studied was prepared
by Middlebrooks et al.l They listed 14 different methods for removing lagoon
suspended solids but indicated that none of them had proven economically
feasible by 1974 when their review was published.
Another method which had not been previously examined but which had
potential was the large rock media filter. A labolatory pilot plant employ-
ing a rock media filter was studied initially by D.M. Martin^ at the Univer-
sity of Kansas in 1970. Results were sufficiently promising to stimulate a
field scale pilot study on a small scale by J.L. Martin and R. Weller3.
Results from these two studies were combined into a large scale pilot plant
sutdy that was proposed and accepted by EPA. This report deals with the
construction and operation of the field scale rock filter pilot plant at
Eudora, Kansas, by the Environmental Health Research Laboratory of the
University of Kansas and represents the most detailed study to date on the
use of a large rock filter system to remove the suspended solids from the
effluent of an operational facultative lagoon system treating municipal
wastewaters from a typical, small, midwestern community.
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SECTION II
CONCLUSIONS
The following conclusions were drawn from the data obtained in this
study.
1. The 3 cell facultative lagoon treating Eudora municipal wastewaters
operated at 55 percent hydraulic capacity and produced an effluent con-
taining an average of 60 mg/1 suspended solids and 21 mg/1 8005.
2. The rock filter pilot plant gave limited suspended solids reductions,
dropping the influent from an average of 53 mg/1 to between 32 and 35
mg/1.
3. The suspended solids concentrations in the effluent from the rock filters
were unaffected by hydraulic flow through the rock filters up to the
maximum loading rate of 2978 l/m^/day in the large rock filter and 2188
in the small rock filter.
4. The removal of suspended solids by the rock filters was directly propor-
tional to the suspended solids applied with both the small rock filter
and the large rock filter removing the same quantities of suspended
solids.
5. The biological degradation within the rock filter resulted in decreased
dissolved oxygen concentrations.
6. The results of the rock filter pilot plant were not sufficient to justify
recommending the use of rock filters as a method for reducing the
effluent suspended solids from a facultative, lagoon to meet the 30 mg/1
EPA effluent criteria.
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SECTION III
RECOMMENDATIONS
This pilot plant study showed that the rock filter could help reduce the
suspended solids in wastewater lagoon effluents but the reduction was not
sufficient to produce a consistent effluent quality under 30 mg/1 suspended
solids. The reduction in suspended solids was related to the nature of the
suspended solids. Algae made up the major fraction of suspended solids
applied to and removed by the rock filter. For the most part the predominant
algae in this study were Oscillatoria, Chlorella, Scenedesmus and Nitzchia.
These algae were relatively small and difficult to remove.
During the course of this research project a number of engineers
requested information on the potential of the rock filter. Several rock
filters have been designed based on the preliminary data which showed reason-
able results. Because of the limited size of this pilot plant, it will be
necessary to examine several full scale systems to determine the real charac-
teristics of the rock filter under daily operating conditions for several
years.
Since the EPA Construction Grant Program is responsible for funding most
improvements and additions to municipal wastewater treatment systems, EPA
should maintain a list of all plants where rock filters have been approved as
part of the treatment system. As data on plant operations becomes available
on a regular basis, efforts should be made to correlate the data with antici-
pated results and to publish the information so that consulting engineers can
be made aware of the value or the lack of value of rock filters.
As problems are reported in the field, EPA should note the problems and
determine the seriousness of these problems. Where possible, solutions
should be developed to improve operations either by the EPA or other re-
searchers interested in this area.
If possible, EPA should select one or two typical rock filter installa-
tions and examine them in detail over a period of at least one year to deter-
mine in greater depth what results might be expected in contrast to the
limited data than would be.available through the normal data reporting
mechanisms.
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SECTION IV
EXPERIMENTAL FACILITIES
The municipal wastewater lagoon system at Eudora, Kansas was selected for
testing the rock filter concept. The lagoon system consisted of three cells
in series and was designed to treat the wastewaters from a population of
4,000 people. The design flow was based on a projected flow of 379 I/capita/
day (100 gcpd) dry weather flow. The average depth of water in each cell
was 1.5m (5 ft). Black and Veatch, the design engineers, followed the design
criteria recommended by the Division of the Environment, Kansas State Depart-
ment of Health.^ Efforts were made to provide maximum operational felxibili-
ty by providing piping to permit different operating patterns.
The primary operational pattern is shown in Figure 3. Raw wastewaters
are pumped from Eudora to the lagoon which is located just outside of the
residential area on the west side of Eudora next to the Wakarusa River. A
diversion box located between the three cells permitted splitting the flow
to the first two cells or directing the flow to either cells 1 or 2. During
the time over which this study was made, the wastewater flow was diverted
into Cell 1 which had an area of 3.16 ha (7.8 acres). The effluent from Cell
1 was discharged to Cell 2 which had an area of 1.50 ha (3.7 acres). From
Cell 2 the flow went to Cell 3 which had an area of 3.17 ha (7.8 acres).
The total area of the lagoon system was 7.83 ha (19.3 acres). The estimated
water volume in each cell was as follows: Cell 1, 45.7 x 10^ 1, Cell 2, 21.3 x
106 1 and Cell 3, 45.9 x 106 1.
The Eudora lagoon system was placed into operation in 1972 and had a
sewered population of approximately 2,200 people when data collection was
started in 1974. The average daily dry weather flow in 1973 was approximate-
ly 208 I/capita/day (55 gcpd). This flow yielded theroetical retention times
of 100 days each in Cells 1 and 3 and 46 days in Cell 2 for a total retention
time of 246 days. This facultative lagoon system was typical for municipal
wastewater treatment in the midwestern part of the United States in that it
operated well below design capacity. In spite of the low organic load and
the long retention time, the effluent quality from Cell 3 generally exceeded
EPA effluent suspended solids criteria, making it an excellent system for
testing the rock filter concept.
•=i
The experimental rock filter was designed to examine two different rock
sizes as well as the overall concept of rock filtration. The pilot plant
used to evaluate the rock filter was constructed adjacent to the existing la-
goon system as shown in Figure 3. The test lagoon was constructed as a small
section of a normal lagoon. The size of the test lagoon was limited to a
reasonable size for proper evaluation and to a size which could be easily
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PUMP O
STATION
EFFLUENT
FLOW
ADJUSTMENT
VALVE
XPERIMENTAL
!OCK FILTER
LAGOON
SMALL ROCK
FILTER
CELL 2
1.50 HA
•RAWWASTEWATER-
2,200 PE
PUMP
STATION
if SAMPLE LOCATIONS
PLAN VIEW
FIGURE 3. SCHEMATIC DIAGRAM OF THE EUDORA LAGOON SYSTEM AND THE EXPERIMENTAL FILTER.
FLOW ;;
ADJUSTMENT!!
VALVE -».ji
WALKWAY
NFLUENT
POND
FFLUENT
POND !
SMALL ROCK FILTER
SsiS^ksel
OUTLET
STRUCTURE
*g
1369
—i—i—i
METERS
EFFLUENT
:OPUMP
"Ar SAMPLE LOCATIONS PLAN VIEW
FIGURE 4. SCHEMATIC DIAGRAM OF THE PILOT ROCK FILTER LAGOON.
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filled in when the study was completed. The lagoon was designed so that the
volume of earth removed during its construciton equaled the volume of earth
for dikes above the natural ground surface. The length of the test lagoon
was approximately 41m (135 ft) between the top edges of the dikes around the
test lagoon and the width was approximately 28m (92 ft). The water level
within the test lagoon was maintained at 1.22m (4.0 ft) with the dikes having
a height of 1.5m above the bottom.
A center wall of asphalt coated sheet piling was constructed along the
middle axis of the test lagoon as shown in Figure 4. The center wall divided
the test lagoon into two separate cells of equal size. A walkway was placed
along the top of the divider wall to permit easy access across the center of
the test lagoon. The rock media was placed across the test lagoon approxi-
mately 2/3 of the distance between the influent end and the effluent end.
Both rock filters were constructed 1.4m (4.5 ft) high so that influent would
flow over the top of the rock filter if the filter should become clogged
rather than flowing over the dikes around the test lagoon. The rock slopes
were approximately 3:1 on a horizontal to vertical basis.
Two sizes of rock were used in the rock filters to determine the rela-
tive merits of large rock media with large void spaces and small rock media
with small void spaces. Approximately 400 tons of each type of rock was used
in the construction of the rock filters. The rock types were chosen for
their availability and lower cost. Special rock sizes take special orders
and require both more time to obtain and more expense. The rock filters were
composed of crushed limestone having the size gradations shown in Table 1.
TABLE 1. SIZE GRADATION OF THE RDCK USED IN THE TWO FIELD SCALE FILTERS
Sieve Opening % Weight Retained
mm Large Rock Small Rock
50.8
38.1
25.4
19.1
12.7
9.5
6.7
4.7
7.4
28.8
52.0
10.4
1.3
0.1
13.4
33.1
39.0
10.4
3.2
0.9
Porosity 0,44 0.44
The large rock media was standard filter rock while the small rock media was
Corp of Engineer ballast rock. Photographs of the two rock media are shown
in Figures 5 and 6. Both photographs were taken from the same distance to
show the relative sizes of the two rock media. The large rock filter had a
10
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Figure 5. Media used in the large rock filter.
Figure 6. Media used in the small rock filter.
11
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base width of 13.7m (45 ft) and a top width of 5.5m (18 ft). The small rock
media compacted more than the large rock media and had a base width of 14.3m
(47 ft) and a top width of 6.1m (20 ft). Figures 7 and 8 show how each rock
filter looked before the start of the study. Figure 7 shows the center wall
and the rock filters before the walkway was constructed. Figure 8 shows the
outlet structure and the two rock filters across the test lagoon.
In an effort to obtain data inside of the rock filter, three sampling
tubes were placed vertically across each filter at 2.7m (9 ft) on center as
shown in Figure 3. The sampling tubes were 102mm (4 inches) diameter plastic
pipe with a series of holes, 12.7mm (0.5 inch) diameter, spaced at 76.2mm_
(3 inches) intervals. Each series of holes consisted of four holes at 90°
spacing. The cross-section of the rock filter and sampling tubes is shown in
Figure 9.
Part of the effluent from Cell 3 of the Eudora lagoon system was collect-
ed by gravity in a well and was pumped by a 2 HP submersible pump through a
102mm (4 inches) diameter plastic pipe to the inlet of the test lagoon. A
152mm (6 inches) cast iron pipe was placed through the lagoon dikes to pre-
vent crushing the influent pipe. The inlet structure split the influent flow
between the two rock filters. TWO 15° V-rated weirs were used to measure the
flow to each side of the test lagoon. The outlet structure was designed to
collect the effluent from the rock filters. Wooden stop planks were used to
control the water level in the test lagoon and a second set of 15° V-notch
weirs were used to measure the flows out of the test lagoon. Baffles were
placed around the out structure to a depth of 0.76m (2.5 ft) below the water
surface to prevent scum from the surface being discnarged in the effluent.
The effluent was collected in a second wet well and was pumped back to the
inlet structure of the Eudora lagoon system.
The design of the rock filters in the test lagoon resulted in two
influent ponds ahead of the rock filters and two effluent ponds. The influ-
ent ponds contained approximately 120m3 at the normal operating depth of
1.22m. The effluent pond volume was 85m3.
12
-------
Figure 7. Centerwall and rock filters during construction,
ir?ii.'3£' •"••
mifi£$
Figure 8.
Rock filters looking from effluent end towards
the influent end during construction.
13
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Sampling Tubes
' Outlet Structure
Flow Direction
0
Scale
2
3
Meters
FIGURE 9, A CROSS SECTION OF THE ROCK FILTERS,
-------
SECTION V
EXPERIMENTAL PROGRAM
The test facility was completed and placed into operation on January 4,
1974. Filling the test lagoon facility required approximately one week to
January 10, 1974. Three sets of grab samples were collected each week from
January 25, 1974 through May 16, 1975. Each set of grab samples were taken
at the following locations:
1. effluent from Cell 3,
2. influent to rock filter lagoon,
3. effluents from each rock filter lagoon
Periodic samples were collected from the sample tubes within the two
filters. The sample locations are shown by the stars in Figures 1 and 2.
Field data included measurement of flows into and out of the rock filter
cells, temperature and dissolved oxygen. The initial temperature measure-
ments were made with a mercury thermometer. After April 1, 1974, temperature
measurements were made with a thermister in conjunction with the direct read-
ing dissolved oxygen probe. No dissolved oxygen measurements were made in
the field prior to April 1, 1974.
Chemical analyses were made for the following parameters:
1. pH
2. total suspended solids (TSS)
3. volatile suspended solids (VSS)
4. total chemical oxygen demand (COD)
5. soluble chemical oxygen demand
6. total biochemical oxygen demand (8005)
7. soluble biochemical oxygen demand
8. alkalinity, as CaC03
9. ammonia nitrogen (NH^-N)
All of the chemical analyses were made according to the methods speci-
fied in the 13th edition of Standard Methods^ with the exception of ammonia
nitrogen which was determined by means of a direct reading specific ion
electrode". Total phosphorus measurements, chlorophyll measurements and
algal species identification counts were made from time to time.
Since the study was started in the middle of the winter, January, 1974,
it was carried through the second winter and into the spring to determine the
impact of cold weather both on startup and on normal operations. The data
15
-------
collected during this study permitted not only direct evaluation of the rock
filters in removing suspended solids but also permitted some evaluation of
the characteristics of those suspended solids.
EUDORA LAGOON EFFLUENT
Samples of the effluent from Cell 3 were collected and analyzed from
June 1, 1973 to give a better understanding of the effluent quality to be
expected from this three cell lagoon system. The data collected from June 1,
1973, through December 12, 1973, indicated a range in suspended solids in the
effluent from a low of 25 mg/1 to a high of 183 mg/1. The median value
during this period was 63 mg/1 suspended solids. Only 5 percent of the 65
samples were under 30 mg/1. The high value of suspended solids, 183 mg/1,
occurred in June with a sharp bloom of algae followed by rapid removal by
predation of Daphnia and Cyclops. Six days after the 183 mg/1 suspended
solids concentration, the suspended solids were reduced to 25 mg/1. By and
large the suspended solids fluctuated with changes in the microbial popula-
tions. A rise in suspended solids generally was observed to be related to an
increase in algae as seen by routine microscopic examination. Detailed
quantitative evaluation of the specific microorganisms was not made during
1973, only qualitative changes were observed. The routine microscopic exam-
ination of Cell 3 effluent indicated that a reduction in suspended solids was
accompanied by an increase in predators and a decrease in algae populations.
Detailed data on the suspended solids in Cell 3 effluent are given in
Appendix A.
The BOD5 data on Cell 3 effluent samples indicated a range from 12 mg/1
to 46 mg/1 with a median value of 23 mg/1. Approximately 79 percent of the
56 samples tested for BODij showed less than 30 mg/1 with only one sample
above 45 mg/1. Soluble 8005 data ranged from 1 mg/1 to 28 mg/1 with a median
value 6 mg/1. The data indicated that biodegradable organics were being
removed from the Eudora wastewaters. The suspended BOD^ data indicated a
median active mass of approximately 21 mg/1 volatile suspended solids. With
10 per cent inorganic suspended solids together with the 21 mg/1 VSS, there
were approximately 23 mg/1 living mass of microbes in the 63 mg/1 suspended
solids.
The COD of the effluent from Cell 3 measured between 52 mg/1 and 324
mg/1 with a median of 124 mg/1. The soluble COD data showed a median value
of 64 mg/1. Both the soluble BOD5 and the suspended BOD5 indicated that most
of the soluble COD was non-biodegradable. Approximately 50 per cent of the
suspended COD was non-biodegradable although 92 per cent of the effluent
suspended solids were volatile solids.
Regular sampling of the experimental filters started on January 25,
1974. The data on the effluent from Cell 3 are presented in detail in
Appendix A. Table 2 shows the monthly averages of the suspended solids, COD
and BOD5 data for the 16 months the project was operational. The suspended
solids varied from a minimum of 36 mg/1 in December, 1974, to a maximum of
73 mg/1 in February, 1974. The average suspended solids concentration from
Cell 3 was 60 mg/1 with a median of 62 mg/1. The average volatile suspended
solids was 48 mg/1, 80 per cent, with a median of 50 mg/1. The total COD
16
-------
ranged from 92 mg/1 to 144 mg/1 with an average of 122 mg/1 and a median of
130 mg/1. The soluble COD varied from a low of 44 mg/1 to a high of 65 mg/1
with an average of 53 mg/1. The suspended COD averaged 69 mg/1, giving a
COD/VSS ratio of 1.44. The total BOD5 averaged 21 mg/1 with a low of 13 mg/1
and a high of 34 mg/1. The median value of the 6005 was 16 mg/1. The solu-
ble BOD5 averaged 3.8 mg/1, indicating little biodegradable organics in the
effluent. The normal BODs/COD ratio for the soluble organics indicated 46
mg/1 non-biodegradable COD with 39 mg/1 non-biodegradabel suspended COD.
Approximately 43 per cent of the suspended solids were active microbial
solids based on biodegradability of the suspended solids. These data defi-
nitely indicated that the 3 cell lagoon was unable to meet the EPA effluent
criteria for suspended solids and fell short of the BODs criteria two months
out of 16 months.
TABLE 2. MONTHLY AVERAGES OF CELL 3 EFFLUENT
Month
1974
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1975
Jan.
Feb.
Mar.
Apr.
May
Average
Total
SS
(mg/1)
73
66
47
54
52
57
67
63
69
60
36
50
66
71
53
69
60
Volatile
SS
(mg/1)
59
47
33
41
40
44
60
53
60
52
30
41
54
60
36
64
48
Total
COD
(mg/1)
143
144
99
102
96
92
133
124
139
130
99
112
133
136
130
142
122
Soluble
COD
(mg/D
44
56
65
52
45
49
50
52
52
53
54
54
60
54
66
48
53
fotal
BOD,.
(fflg/I)
30
16
20
16
13
14
17
16
15
15
14
22
34
33
28
27
21
Soluble
BOD
(mg/J)
7.3
4.8
4.5
3.5
3.0
3.6
3.9
3.9
3.5
1.7
1.2
3.6
6.5
3.5
4.2
2.5
3.8
Table 3 presents the monthly averages of the temperature, dissolved
oxygen, pH, ammonium-nitrogen, and total phosphorus. The water temperature
17
-------
averaged 14<>C with a monthly average ranging from 3°C to 29°C. From May
through September, the water temperature was above 20°C while it was below
5°C from December through February. Temperature is very important in control-
ling the growth of microorganisms in the lagoon system.
TABLE 3. MONTHLY AVERAGES FROM CELL 3
Month
1974
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1975
Jan.
Feb.
Mar.
Apr.
May
Average
Water
Temp.
oc
50
10
15
21
23
29
25
20
15
9
4
3
3
7
14
22
14
Dissolved
Oxygen
(mg/1)
^
-
11.8
6.6
5.0
5.4
6.1
7.4
8.7
8.4
15.7
19.6
15.4
17.1
9.8
13.0
10.7
pH
7.6
7.8
8.0
8.6
8,6
8.8
8.8
8.8
8.7
8.0
8.5
8.6
8.7
8.8
9.0
9.2
8.5
NHj-N
(mg/1)
14
12
8.1
0.90
0.17
0.11
0.48
0.95
0.81
0.24
0.44
2.5
2.8
2.5
1.0
0.41
3.0
Total P
(mg/1)
8.0
6.5
6.1
2.7
2.3
1.6
1.8
2.3
3.4
2.7
3.1
3.8
3.0
2.6
1.6
0.9
3.3
B "
The dissolved oxygen in the effluent from Cell 3 was a minimum in June,
5.0 mg/1, and a maximum of 19.6 mg/1 in January. The low temperature in
January reduced biological activity while permitting greater oxygen solu-
bility. The average monthly pH was 8.5 with a range from 7.6 to 9.2. The
higher pH values were obtained when high algal metabolism removed the carbon
from the bicarbonates to form hydroxide which forced some of the bicarbonates
to carbonates.
~ OH
+ 02 + "C in algal cells"
The nutrients, nitrogen and phosphorus, follow the normal trend of
metabolism. Ammonium nitrogen averaged 3.0 mg/1 during this study, dropping
18
-------
from 14 mg/1 to 0.11 mg/1. The phosphorus averaged 3.3 mg/1 and varied from
8.0 mg/1 to 0.9 mg/1. Just prior to the start of data collection Cell 3 was
the second cell in series since Cell 1 was used for fish culture. The flow
pattern had been from Cell 2 to Cell 3. A heavy algae bloom during the sum-
mer of 1973 in Cell 2 resulted in the application of copper sulfate to con-
trol excess algal growths. The algae Were killed off by the copper sulfate
but not the bacteria. The net result was anaerobic metabolism and excessive
odors. In an effort to control the odor nusiances Cell 1 was placed back
into operation as part of the lagoon system during the fall of 1973. The
high ammonium and phosphorus concentrations in February, 1974, reflected the
nutrients which had accumulated in Cell 3 from the previous mode of operation.
The ammonium nitrogen dropped to a minimum with metabolism in July 1974 and
rose to a maximum at the end of the cold weather period in February. The
phosphorus followed similar trends as the ammonium nitrogen but did not reach
as low a level. Nitrogen was more of a limiting nutrient than phosphorus.
The lagoon difinitely showed that it could reduce both nitrogen and phos-
phorus to low levels during the warm summer months when maximum impact would
be exerted on receiving streams.
ROCK FILTER INFLUENT
The effluent from Cell 3 was partially diverted into a wet well and
pumped by a 2 HP submersible pump to the head end of the rock filter lagoon.
A sample of influent was collected at the same time that the samples were
collected of the effluent from Cell 3. The purpose of the second sample was
to determine if a significant change occurred in the wet well and in the pipe
between the wet well at the discharge from Cell 3 and the influent to the
rock filter.
Detailed data for the chemical characteristics of the rock filter influ-
ent are given in Appendix B. A summary of the 16 month averages for both the
effluent from Cell 3 and for the influent to the rock filters is given in
Table 4. The data tend to indicate that little change occurred during the
travel from the effluent of Cell 3 to the influent of the rock filter lagoon.
The dissolved oxygen concentration dropped approximately 4.5 mg/1 as might
be expected since the microbes are retained in the dark without an opportuni-
ty for reaeration. The other chemical characteristics were essentially the
same, being within normal variations for the analytical tests used.
Examination of the influent characteristics indicated a COD/VSS ratio of
1.53, close to normal for a biological wastewater treatment system. The 16
mg/1 suspended BOD5 indicated that approximately 47 per cent of the volatile
suspended solids were living microbial solids. As one would expect 87 of the
soluble COD was non-biodegradable. No special analyses were made to deter-
mine the chemical nature of the non-biodegradable COD. The ammonium nitro-
gen and phosphorus were in excess so that further microbial growth was
possible.
The influent to the rock filters was discharged over two 15° V-notched
weirs to provide sufficient depth of flow so that regular measurement of the
influent flow rate was possible. The discharge from the two weirs was
collected in the influent ponds in front of each rock filter. In effect,
19
-------
the two systems were controlled at the same flow rate by adjustment of flow
over the V-notched weirs. The purpose of the influent ponds in front of each
rock filter was to provide a retention period for flow distribution across
the face of the rock filters.
TABLE 4. MONTHLY AVERAGE CHEMICAL CHARACTERISTICS
Parameter
(mg/D
Effluent
Cell 3
Influent
Rock
Filters
Effluent
Large Rock
Filter
Effluent
Small Rock
Filter
Suspended Solids
Volatile Suspended
60
53
35
32
Solids
Total COD
Soluble COD
Total BOD_
Soluble BOD5
Ammonium Nitrogen
Total Phosphorus
Dissolved Oxygen
o
Temperature, C
PH
48
122
53
21
3.8
3.0
3.3
10.7
14
8.5
43
119
53
20
4.3
3.7
3.6
6.2
14
8.4
28
96
53
17
5.9
3.1
3.7
2.4
14
8.1
25
89
51
15
5.8
4.6
3.8
2.4
17
8.1
The detention periods for the influent flows into the influent ponds are given
in Table 5. It can be seen that the detention time in the influent pond for
the large rock filter ranged form 0.3 to 1.9 days; while the detention time
in the influent pond for the small rock filter ranged from 0.4 to 13.6 days.
The effluent from the rock filters was collected in a small effluent pond
prior to being discharged over a second set of 15° V-notched weirs into the
outlet structure. The theoretical liquid detention times in the effluent
ponds for both the large rock and the small rock filters are also given in
Table 5.
LARGE ROCK FILTER
The influent to the large rock filter passed through the influent pond
onto the surface of the rock filter and then through the void spaces around
the rocks out into the effluent pond following the rock filter. For purposes
of evaluating the rock filters, it was decided to base the hydraulic loading
on a volumetric basis, 1/nr/day (gal/ft3/day) rather than on a surface area
basis. The volumetric loading basis was believed to give a better estimation
of the total potential load on the rock filter since the suspended solids
would fill up the total void spaces in the rock filter and not just the
surface area. The volumetric loadings for the large rock filter are given
in Table 5.
20
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TABLE 5. HYDRAULIC LOADINGS AND DETENTION TIMES IN EACH FILTER SYSTEM
Large Rock Filter
Influent Pond Filter
Detention Time Hydraulic Loading
Month Days l/m3/day gal/ft3/day
Feb 1974
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec 1-17
Dec 18-31
Jan 1975
Feb
Mar
Apr
May
Feb 1974
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec 1-17
1.2
1.8
1.2
0.8
0.7
1.5
1.2
0.3
0.5
1.0
1.3
0.5
0.5
1.8
1.9
0.8
1.0
1.0
1.3
0.9
0.8
0.6
1.2
1.9
0.4
0.8
1.6
13.6
850.8
551.1
870.1
1216.8
1546.9
676.8
812.1
2977.8
1856.3
986.2
781.2
2088.3
1838.9
572.4
535.6
1278.4
1030.7
Small Rock
878.6
637.4
930.3
1050.9
1378.2
706.3
447.9
2187.9
1085.3
516.8
62.0
6.4
4.1
6.5
9.1
11.6
5.1
6.1
22.3
13.9
7.4
5.6
15.7
13.8
4.3
4.0
9.6
7.7
Filter
6.6
4.7
7.0
7.9
10.3
5.3
3.6
16.4
8.1
3.9
0.5
Effluent Pond
Detention Time
Days
0.8
1.2
0.8
0.6
0.4
1.0
0.8
0.2
0.4
0.7
0.9
0.3
0.4
1.2
1.2
0.5
0.7
0.7
1.0
0.7
0.6
0.4
0.9
1.4
0.3
0.6
1.2
9.8
21
-------
The hydraulic flow rate to the rock filter was increased steadily until
June, 1974, when a power outage resulted in a short shutdown for several days.
Efforts were made to keep the pilot plant in continuous operation but period-
ic thunderstorms during the summer and fall of 1974 resulted in five periods
of power outages. These power outages are typical for small wastewater treat-
ment systems in Kansas where severe thunderstorms result in periodic power
failures. Fortunately, most wastewater treatment plants have automatic
power reset circuits. The pilot plant was not designed for automatic power
reset; but rather had manual reset switches which were activated by the
sampling crews when they collected samples for analysis.
The analytical data collected from the samples of effluent from the rock
filter are given in Appendix C. Plots of the total suspended solids data for
the influent and for the effluent samples from the large rock filter are
shown in Figure 10. The data have been plotted as a 3 point running average
to smooth out the sharp variations that occurred from time to time as a
result of a single sample. Use of the running averages permits easier eval-
uation of the large number of data points as far as trends are concerned.
The influent suspended solids to the rock filters showed a very rapid
increase at the end of February, 1974, when the water temperature began to
increase. A very heavy growth of Chlorella resulted initially and was
followed by a heavy growth of both Moina and Daphnia. The large rock filter
did not have an effect on Chlorella, which passed right through the voids.
The suspended solids dropped to their lowest level in March as the Daphnia
stripped out all the Chlorella. Once the Chlorella were removed, the
Daphnia decreased rapidly. This was the only time there was a large bloom
of either Chlorella or Daphnia during the course of this study.
The removal of the Chlorella by the middle of March left considerable
ammonium nitrogen and phosphorus in Cell 3. The low suspended solids in Cell
3 permitted good light penetration which stimulated the growth of other
species of algae. The suspended solids quickly rose as the new species of
algae grew up. There was a slow but steady removal of algae in the large
rock filter. By the end of May the large rock filter was showing a signifi-
cant removal of algae.
As indicated earlier, a series of five power outages occurred during the
summer and fall of 1974. Each time a power outage occurred, the efficiency
of the rock filter for removing suspended solids declined for a short period.
The best removal of suspended solids occurred during the warm, summer months.
Examination of the submerged rock indicated the rock surfaces were coated
with microbial growth, much like a trickling filter. It appeared that part
of the removal of algae was by adsorption onto the microbial slime layer on
the large rock media.
The onset of cooler weather in November and December resulted in a de-
crease in algae in the influent and in the removal of algae. The filter
operation during spring, 1975, was similar to that during spring, 1974,
except there was no major bloom of Chlorella in 1975 as there was in 1974.
The winter of 1974-75 had less snow that the winter of 1973-74, permitting
better light penetration and more uniform algal growth rather than a sudden
22
-------
NS
EPA EFFLUENT CRITERIA
L 1 —I I 1 I
FEB MAR APR MAY JUN JUL AUG SEP OCT Nov DEC JAN FEE MAR APR MAY
MONTHS (1974-1975)
FIGURE 10. INFLUENT AND EFFLUENT SUSPENDED SOLIDS FROM THE LARGE ROCK FILTER SYSTEM.
-------
bloom when conditions became favorable.
The total BODs data are presented in Figure 11. As with the suspended
solids data, the BOD5 data are plotted as a 3 point running average. The
data show little BOD5 reduction and periods of increased BOD5 in the effluent.
The low BODs of the influent reflected the high degree of treatment provided
by the Eudora lagoon system. The data in appendices A and B indicated that
most of the BOD5 in the effluent from Cell 3 and in the influent to the rock
filters was suspended BOD5, probably in the form of living microbial cells.
During warm weather BOD5 data decreased, rising during cold weather, as would
be expected.
The soluble COD data, Figure 12, showed little change once the system
settled down. During the summer the soluble COD in the effluent exceeded the
soluble COD in the influent. For the most part the variations in soluble COD
data were within normal variations in sampling and analysis. The major change
in the data across the rock filter can be seen in Figure 13, a plot of the
dissolved oxygen concentrations in both the influent to the large rock filter
and in its effluent. The drop in dissolved oxygen across the rock filter is
a good indication of biological activity within the filter. It appeared that
the lack of dissolved oxygen in the influent during the summer months limited
aerobic metabolism within the filter. It was not until December, 1974 that
the effluent from the large rock filter showed sufficient dissolved oxygen
for the reactions to be aerobic. There was 9.8 mg/1 dissolved oxygen change
across the rock filter in December and iO.4 mg/1 change in January, 1975.
Needless to say, the lack of sufficient dissolved oxygen in the rock filter
influent resulted in anaerobic conditions within the rock filter. The
ammonium nitrogen change across the rock filter, as plotted in Figure 14,
showed a slight increase during the summer months. These data tended to
indicate some biological degradation within the filter. During the cooler
periods there was an uptake in nitrogen, indicating growth of microorganisms
within the rock filter.
Fata collected from the samples taken from the sampling tubes within the
large rock filter are presented in Appendices F and XJ. The changes in chemi-
cal characteristics were small with only the dissolved oxygen showing a sig-
nificant Ohange. Table 6 shows the change in dissolved oxygen through the
large rock filter for a typical warm month and a typical cold month.
TABLE 6. DISSOLVED OXYGEN CONCENTRATIONS ACROSS LARGE ROCK FILTER
Sampling Tube in Rock Filter
D.O. (mg/1) Influent Upstream Center Downstream Effluent
June, 1974
Jan., 1975
3.5
15.4
1.3
12.6
0.0
8.4
0.0
2.2
0.1
5.0
The dissolved oxgyen change through the rock filter reflected the biological
activity that occurred within the filter. In June, 1974, the dissolved
oxygen was quickly removed in the front section of the rock filter. As the
temperature decreased, the influent dissolved oxygen increased as indicated
24
-------
ro
POWER OUTAGES
EPA EFFLUENT CRITERIA X" if
10-
FEB MAR APR MAY JUN JUL AUG SEP OCT Nov DEC JAN FEB MAR APR MAY
MONTHS (1971-1975)
FIGURE 11, TOTAL BODg DATA FOR THE LARGE ROCK FILTER SYSTEM,
-------
10
POWER OUTAGES
NX
:? !
INFLUENT —
EFFLUENT —
FEE MAR APR FIAY JUN Jut AUG SEP OCT Nov DEC JAN FEB
MONTHS (1974-1975)
FIGURE 12. SOLUBLE COD DATA FOR THE LARGE ROCK FILTER SYSTEM.
MAR APR
-------
FEB MAR APR MAY JUN JUL
DEC JAN FEB MAR APR HAY
AUG SEP OCT Nov
MONTHS (1974-1975)
FIGURE 13. DISSOLVED OXYGEN DATA FOR THE LARGE ROCK FILTER SYSTEM,
-------
00
FEE MAR APR MAY JUN™ JUL
SEP~~ OCT ftov "DEC JAN FEB MAR APR MAY
MONTHS (1974-1975)
FIGURE 11. AMMONIUM NITROGEN DATA FOR THE LARGE ROCK FILTER SYSTEM.
-------
by the data for January, 1975. The dissolved oxygen dropped rapidly through
the center of the rock filter, decreasing an average of 10.4 mg/1 over a
distance of 5.4 m. The drop in dissolved oxygen indicated good biological
activity even during the cold periods. The rise in dissolved oxygen was a
result of algal growth in the effluent pond section of the experimental rock
filter lagoon. These data pointed to the importance of dissolved oxygen in
stabilizing the organic matter removed by the rock filter.
SMALL ROCK FILTER
The data on the chemical analyses of the samples collected from the
small rock filter are given in Appendices D, E and G. Monthly averages for
samples collected during the 16 months of this study are given in Table 4.
It can be seen that the small rock filter gave slightly better removals of
suspended solids, COD and 6005 than the large rock filter, but the differences
were within experimental variations of sampling and analysis. Table 5 gives
the hydraulic loading data on the small rock filter. The decreased flow rate
in August, 1974, was the result of increased head loss through the small rock
filter. A leak occurred in the baffle wall between the two rock filters in
May and resulted in increased flow to the large rock filter. The data in
Table 5 reflects the effect of the leak on the flows through both rock fil-
ters. Heavy growths of algae occurred on the backside of the small rock
filter the first of December, essentially stopping flow through the filter.
The backside of the small rock filter was thoroughly raked to dislodge the
algae. The algal growths were too dense to unclog the filter. On December
17, 1974, the small rock filter was taken out of service after 11 months of
operations.
The suspended solids data for the influent and the effluent samples from
the small rock filter are plotted in Figure 15. Unlike the data plots for
the large rock filter, all of the individual data points are given in Figure
15. These data show the sharp variations of the individual data points rath-
er than the smoother data points using 3 day running averages. The power
outages affected the small rock filter operations the same as the large rock
filters. Good suspended solids reductions occurred in October, 1974, just
before the final power outage and clogging of the filter.
The BOD5 changes across the small rock filter are shown in Figure 16.
The overall BOD5 reduction averaged 5 mg/1. It can be seen that more 6005
appeared in the effluent in October than was in the influent. The surface
raking of the backside of the small rock filter in December resulted in a
sharp increase in effluent BOD5. The ammonium nitrogen data plotted in
Figure 17 showed a release of ammonium nitrogen from May, 1974, on until the
filter clogged in December. The data in Table 4 indicated an overall in-
crease of ammonium nitrogen of 0.9 mg/1.
The changes in dissolved oxygen across the small rock filter was a good
measure of biological activity within the filter. Table 7 shows the changes
in dissolved oxygen through the small rock filter.
29
-------
U)
o
EPA EFFLUENT
IRITERIA
30-
10-
JAN
FEE MAR APR
AUG
MAY JUN Jut
MONTHS -(1971-1975)
FIGURE 15. . SUSPENDED SOLIDS SMALL ROCK FILTER.
OCT
Nov DEC
-------
EPA EFFLUENT CRITERIA .
MAY JUN JUL Aus SEP
MONTHS (1974-1975)
FIGURE 16. TOTAL 8005 SMALL ROCK FILTER,
OCT
Nov DEC
-------
10
JAN FEB
MAR APR MAY JUN Jut Aue
MONTHS (1974-1975)
FIGURE 17. AMMONIUM NITROGEN DATA FOR THE SMALL ROCK FILTER SYSTEM.
-------
TABLE 7. DISSOLVED OXYGEN CONCENTRATIONS ACROSS SMALL ROCK FILTER
Sampling Tube in Rock Filter
D.O. (mg/1) Influent Upstream Center Downstream Effluent
June, 1974
Nov., 1975
3.5
8.7
3.4
9.1
0.0
2.7
0.0
0.3
0.1
3.4
The dissolved oxygen concentrations did not change significantly from the
influent to the upstream sampling tube; but did show a sharp change in the
2.7m distance between the upstream sampling tube and the center sampling tube,
The June, 1974, samples showed the need for additional oxygen. Even the
November, 1974, samples showed a need for more oxygen as the 0.3 mg/.l in the
downstream tube was quite low. Again, the algae on the small rock filter
surface and in the effluent pond after the rock filter helped increase the
dissolved oxygen in the effluent. The sampling tubes within the rock filter
helped show that the change in dissolved oxygen through the rock filter was
greater than indicated by the differences between the influent and the efflu-
ent values.
CHLOROPHYLL AND ALGAE
In an effort to obtain a better understanding of the nature of the sus-
pended solids in the different samples, chlorophyll extractions and algal
counts were made over part of the study period. The chlorophyll extractions
were designed to give a relative measure of the active fraction of algae.
The measurements were made for chlorophyll a, chlorophyll b and chlorophyll
c. Chlorophyll a is found in all algae while chlorophyll b occurs in green
algae and chlorophyll c occurs in diatoms. The data on the chlorophyll con-
centrations are given in Appendix H. Table 8 shows the concentrations of
chlorophyll a through the various units when the effluent from Cell 3 was at
maximum, minimum and median values. Since the maximum chlorophyll a value
was measured after the small rock filter clogged, a second maximum value was
taken when both rock filters were in operation. The maximum value of 913
yg/1 chlorophyll a occurred on March 19, 1975, when the algae began to grow
in the spring. There was a definite drop in the chlorophyll a concentration
in the rock filter influent; but the samples collected over the next few days
reflected the retention of chlorophyll a in the pipe from the end of Cell 3
to the influent pond of the rock filter lagoon. The high concentration of
chlorophyll a in the effluent from the large rock filter was indicative of
regrowth of algae in the effluent pond of the rock lagoon as the downstream
tube within the large rock filter showed much less chlorophyll a.
The data for October 12 showed chlorophyll a concentrations were quite
similar for Cell 3 and the rock filter influent. The large rock filter gave
a definite reduction in chlorophyll a, 62 per cent, with the same concentra-
tion in the downstream tube as in the final effluent. The small rock filter
removed more chlorophyll a than the large rock filter.
The minimum value of chlorophyll a occurred on July 5, 1974. Cell 3
33
-------
effluent had 45 Ug/1 while the rock filter influent showed only 16 Pg/1 con-
centration. It appeared that some of the chlorophyll was retained temporarily
in the pipe between Cell 3 and the rock filter lagoon the same as it did in
February. The median value of chlorophyll a was obtained on November 12,
1974. Half of the time the chlorophyll a concentration was below 177 yg/1.
The drop in chlorophyll a between Cell 3 and the rock filter lagoon was
rather small. The large rock filter gave 47 per cent reduction in chloro-
phyll a, while the small rock filter had 57 per cent reduction with obvious
regrowth. The small rock filter was removing even more chlorophyll as
evidenced by the concentration in the downstream sampling tube.
TABLE 8. CHLOROPHYLL A THROUGH ROCK FILTER SYSTEM
Chlorophyll a in yg/1
Cell 3 Rock Filter Large Rock Small Rock
Date Effluent Influent Filter Effluent Filter Effluent
Minimum
Maximum
Median
July
Oct.
Mar.
Nov.
5,
12,
19,
12,
1974
1974
1975
1974
45
429
913
177
16
388
308
157
31
(135)147
(238)643
(103) 84
(78)
(24)
20
46
68
( ) denotes concentration in downstream sampling tube within the rock
filters.
It has been estimated that chlorophyll a concentrations range from 0.1
to Q.3%dry weight of the algae. This would mean that Cell 3 effluent should
have had between 15 and 45 mg/1 algae on July 5, 1974. The measured suspend-
ed solids were 45 iag/1. The October 12, 1974 data would have indicated from
140-430 mg/1 algae but the suspended solids were only 60 mg/1. The November
12, 1974 data indicated from 60 to 180 mg/1 algae with 71 mg/1 suspended
solids. The March 19, 1975 data showed even greater error. The chlorophyll
a data indicated between 300 and 910 mg/1 algae while the suspended solids
data were only 113 mg/1. These results show the danger in using gross fact-
ors between a small concentration of chlorophyll and suspended solids.
If suffices that chlorophyll concentrations give a general measure of the
algae potential but should be used with caution as to specific quantitative
relationships to algae mass.
For convenience, the algae were placed into four general groups:
1. Blue-green
2. Green
3. Diatoms
4. Flagellates
The specific number of algae in one ml of sample were estimated from routine
microscopic counts using a calibrated counting cell. Appendices J to 0
shows the algae counts for the samples taken during this study. The major
algae identified were Oscillatoria, Chlorella, Scenedesmus, and Nitzchia.
Table 9 sumarizes the algae counts for these predominant algae in the
34
-------
TABLE 9. PREDOMINANT ALGAE IN CELL 3 EFFLUENT
Date
1974
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1975
Jan.
Feb.
Mar.
••^•••A^^— ^»—^— 4»*-^MHtam»B«11l-««*11111111PV»IM11111^^M11l
Oscillatoria
19,800
13,700
23,800
23,000
28,100
32,200
10,700
0
0
0
— 1 •••- HI • 1 •• •! f • . • •^^^^^-M
1000 cells/ml
Chlorella
178,000
107,000
103,000
50,200
30,600
42,500
32,000
41,900
35i800
61,900
^^^•••i^M^^^MMHq^^^^^M^^^^— ^M*^^^
Scenedesmus
5,300
970
2,700
2,100
2,700
6,900
15,000
41,500
33,600
42,200
^^— »*^^— fc^fcl^fc^fc— fc^^— ^p— ^fc^™™^-^^-^^^^^^^^^™™*^— —
Nitzchia
6,700
3,000
9,600
2,100
4,600
10,800
5,250
25
0
500
TABLE 10.
PREDOMINANT AGLAE
IN ROCK FILTER
INFLUENT
Date
1974
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1975
Jan.
Feb.
Mar.
Oscillatoria
28,200
11,400
28,000
'
37,800
29,400
9,900
450
0
1,280
1000 cells/ml
Chlorella
176,000
76,600
60,000
15,300
30,600
47,300
52,100
42,800
43,600
42,300
Scenedesmus
5,000
4,100
920 .
720
3,000
9,600
16,300
40,100
46,000
27,000
Nitzchia
7,800
940
2,700
780
5,200
9,100
5,200
590
0
910
35
-------
TABLE 11. PREDOMINANT ALGAE IN LARGE ROCK FILTER EFFLUENT
Date
1974
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1975
Jan.
Feb.
Mar.
Oscillatoria
29,400
310
2,400
9,200
17,100
16,000
4,200
2,700
0
740
1000 cells/ml
Chlorella
198,000
22,000
19,600
12,600
13,600
19,800
28,300
37,000
29,600
41,800
Scenedesmus
690
2,800
2,200
1,000
2,400
1,400
12,600
28,200
27,500
14,500
Nitzchia
1,100
2,300
220
1,000
3,200
1,900
4,100
0
2,000
1,800
TABLE 12. PREDOMINANT ALGAE IN
SMALL ROCK FILTER
EFFLUENT
Date
1974
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
Oscillatoria
6,200
320
230
8,200
8,400
6,400
0
1000 cells/ml
Chlorella
208,000
24,700
13,000
11,600
4,800
14,700
8,400
Scenedesmus
300
3,100
88,200
980
520
860
3,300
Nitzchia
1,300
520
380
560
990
1,400
1,200
36
-------
samples from Cell 3. The Oscillatoria counts were low as they represented
fragments of several cells. It was not possible to count individual cells of
this filamentous blue green algae. Oscillatoria counts dropped to a minimum
in June and then rose to a maximum in November before cold weather dropped
the Oscillatoria out of the effluent. Chlorella. a tiny, non-motile, green
algae was a maximum in June and dropped to a minimum in October before start-
ing a steady climb to the end of the study. Scenedesmus counts were low in
the summer and rose during the cold weather. The diatom, Nitzchia showed a
series of oscillations during the warm weather and then dropped off with cold
weather. The number of specific flagellated algae were not high enough to be
a major factor in the total algal population.
The influent samples to the rock filter were similar to the samples from
Cell 3 as far as algae counts were concerned. There was some variation as
would be expected for differences in sampling techniques and normal counting
variations. The data for the algae counts in the rock filter influent are
given in Appendix K. The algae counts are summarized on a monthly average
in Table 10. Large rock filter effluent data on algae counts are given in
Appendices L and M with monthly averages presented in Table 11. The data
indicated good removal of Oscillatoria. Chlorella reductions were greatest
in the summer and fall. There were moderate reductions in Scenedesmus and
Nitzchia.
The small rock filter data are presented in Appendices N and 0. Monthly
averages for predominant algae are given in Table 12. It can be seen that
the reduction in algae was greater in the small rock filter than in the large
rock filter. The only unusual occurrence was a sudden bloom of Scenedesmus
in the effluent pond of the small rock filter system in August.
Both the algae counts and the chlorophyll a data showed that the rock
filters were removing a large fraction of the algae applied to the rock
filters. The algae and chlorophyll a reduction data agreed with the suspend-
ed solids reduction data given in Table 4. Even though specific reduction
factors were not readily apparent, the reductions were similar.
Because of the importance of alkalinity for the growth of algae,
data were collected on alkalinity through the filters from July 19, .1974 to
the end of the study. The detailed data for alkalinity are presented in
Appendix I. There were very little changes in the alkalinity over the
period of analysis. Table 13 gives a summary of the total alkalinity data.
TABLE 13. TOTAL ALKALINITY THROUGH ROCK FILTER LAGOON SYSTEM
Alkalinity, mg/1 as Ca 003 Sampling Tubes
Influent Upstream Center Downstream Effluent
Large Rock Filter 264 261 260 (275) 268
Small Rock Filter 255 255 260 (269) 275
The apparent rise in alkalinity appears to be within experimental variation
37
-------
for this set of data. The small number of data points, only 5, for the down-
stream sampling tubes makes it impossible to compare these data with the
other data. The small rock filter had less data than for the large rock
filter which resulted in greater variations in the data. Although the pH
changed from 8.4 to 8.1 the change was not sufficient to affect the alkalinity
forms. Essentially, the alkalinity was bicarbonate alkalinity with little
free carbon dioxide. There did not appear to be sufficient metabolism in the
filter to change the alkalinity.
38
-------
SECTION VI
DISCUSSION OF RESULTS
The Eudora wastewater lagoon was loaded to approximately 55 per cent of
design capacity during this study. The three cell lagoon had a 246 day re-
tention period, more than adequate for a high degree of treatment for munici-
pal wastewaters. As shown in Table 2 Cell 3 produced an effluent relatively
high in suspended solids, averaging 60 mg/1 total suspended solids with 48
mg/1 volatile suspended solids. The effluent had little soluble 6005,
averaging only 3.8 mg/1. The total BOD5 averaged 21 mg/1, giving 17 mg/1
suspended BODs- The COD in the effluent from Cell 3 averaged 122 mg/1 with
53 mg/1 soluble COD. The suspended COD to volatile suspended solids ratio
was 1.44 mg COD/mg VSS, typical for mixed microbial solids. The microscopic
examinations of the effluent indicated that the suspended solids were a mix-
ture of living microbial cells and dead cells. The suspended 8005 indicated
that approximately 43 per cent of the volatile suspended solids were living
cells. In effect, the long retention time in the lagoon resulted in a con-
tinuous recycling of nutrients through the algae. The fine suspended solids
were easily maintained in suspension by periodic wind action across the
surface of the lagoon. The data collected on the effluent from Cell 3 showed
the importance of the suspended solids in determining the overall effluent
quality from a facultative, lagoon treating municipal wastewaters. If the
suspended solids could be reduced to a point where they met EPA effluent
criteria, the effluent BODe; would also be below EPA criteria.
The rock filters were constructed to demonstrate the ability of the rock
filters to remove suspended solids. Figure 18 is a plot of the quantity of
suspended solids removed through both filters. The data for both filters is
quite similar with the removal showing a steady rise through the summer of
1974. The small rock filter clogged in December and was stopped before the
study was completed. The large rock filter showed a drop in suspended solids
removal during the winter with a leveling off during the spring of 1975.
The removal of suspended solids ranged, between 10 and 15 mg/1.
The removal of BOD5 through the rock filters is shown in Figure 19.
The change in BOD,, was low, almost within the experimental error of the
analytical techniques. The 8005 reduction increased through March and then
decreased to October when removal increased again. The data for suspended
solids removal and BOD,- removal did not correlate very well indicating some
changes through the rock filters. The suspended BOD,- data indicated the
volatile suspended solids from the large rock filter effluent were 68 per
cent living microbial mass. The small rock filter data indicated its efflu-
ent contained 63 per cent living micrd.bial mass. The influent to both rock
filters averaged 63 per cent living microbial mass. It appeared the rock
39
-------
60
50
40
*= LARGE ROCK FILTER
0= SMALL ROCK FILTER
20
10
FMAHJJASONDJFMAM
FIGURE 18, SUSPENDED SOLIDS REMOVED IN ROCK FILTERS,
0
-2
-6
BOD DECREASE
x
BOD INCREASE
x= LARGE ROCK FILTER
o= SMALL ROCK FILTER
FMAMJJASONDJFMAM
FIGURE 19, BOD REMOVED IN ROCK FILTERS,
40
-------
filters removed both living microbial solids and inert suspended solids to
about the same extent. The small quantities of change made precise interpre-
tation all but impossible.
The change in dissolved oxygen during the study indicated 3.8 mg/1
dissolved oxygen were utilized through the rock filters. The 3.8 mg/1 dis-
solved oxygen use would have accounted for stabilization of 3.5 mg/1 micro-
bial mass by endogenous respiration. The remaining microbial mas® removed by
the rock filters resulted in the increased BOD,, in the effluent, especially
at the end of the summer as shown in Figure 19. The data indicated the
importance of dissolved oxygen entering the rock filter since degradation of
the microbial solids resulted in a definite oxygen demand within the rock
filter. Without adequate oxygen anaerobic degradation will occur slowly.
Examination of effluent suspended solids and hydraulic loading rates,
plotted in Figure 20, indicated that there was no significant variation in
effluent suspended solids over the range of hydraulic flow in this study
once the system was placed into operation. The variation in effluent quality
appeared to be a random variation with the effluent from the small rock fil-
ter showing slightly better results than the large rock filter. The most
significant fact was the large rock filter did not consistently produce an
effluent under 30 mg/1 suspended solids as originally desired to meet EPA
Effluent Criteria.
Based on the results obtained from the Eudora rock filter pilot plant,
the degree of effluent quality inprovement was not adequate to meet the
desired criteria. Suspended solids reductions increased as the suspended
solids concentration applied increased but the effluent suspended solids
still exceeded the desired limits. The microbial solids removed within the
filter underwent degradation with a slight increase in effluent WV$. It
would appear from this study that rock filters are not an economical method
for adequately reducing suspended solids and BODj in facultative lagoon
effluents.
41
-------
140
120
100
80
S 60
40
20
* =LARGE ROCK FILTER
o =SMALL ROCK FILTER
* *0
xo
X
£S*o
LARGE ROCK FILTER
, SMALL ROCK FILTER
gftK/-j£.Xtrr= X
n v, 0
*
* 0 °*
EPA EFFLUENT
CRITERIA
1000 2000 3000
VOLUMETRIC FLOW RATE
FIGURE 20, EFFLUENT SUSPENDED SOLIDS FROM ROCK FILTERS WITH
VARYING VOLUMETRIC FLOW RATE,
REFERENCES
1. Middlebrooks, E. K., D. B. Porcella, R. A. Gearheart, G. R. Marshall,
J. H. Reynolds and W. J. Grenney, "Techniques for Algae Removal from
Wastewater Stabilization Ponds", Journal Water Pollution Control
Federation, 46, 2676 (1974).
2. Martin, D. M., "Several Methods of Algae Removal in Municipal Oxidation
Ponds", M.S. Thesis, University of Kansas, Lawrence, Kansas (1970).
3. Martin, J. L., and R. Weller, "Removal of Algae from Oxidation Pond
Effluent by Upflow Rock Filtration", M.S. Thesis, University of Kansas,
Lawrence, Kansas (1973).
4. Division of Environmental Health, "Policies Governing the Design of Sew-
erage Systems in Kansas", Kansas Department of Health, Topeka, Kansas
(1970).
42
-------
APPENDICES
APPENDIX A. WATER QUALITY, EFFLUENT FROM EUDORA LAGOON CELL 3
Date
06/01/73
06/02/73
06/03/73
06/04/73
06/05/73
06/06/73
06/07/73
06/08/73
06/09/73
06/10/73
06/11/73
06/12/73
06/13/73
06/14/73
06/15/73
06/16/73
06/17/73
06/18/73
06/20/73
06/21/73
06/22/73
06/23/73
06/24/73
06/25/73
06/26/73
06/27/73
06/28/73
06/29/73
06/30/73
07/01/73
07/02/73
07/03/73
07/04/73
07/05/73
Of/06/73
07/06/73
07/08/73
07/09/73
07/10/73
07/11/73
07/12/73
07/13/73
07/30/73
Total
SS
mg/1
53
90
73
70
68
68
60
65
88
108
183
105
90
78
75
53
25
35
65
45
55
35
42
49
42
76
58
59
38
-
-
68
60
60
50
43
-
-
-
36
-
26
-
Volatile
SS
mg/1
_
78
60
60
60
60
58
60
72
-
152
95
68
70
70
40
-
35
58
38
38
35
40
38
39
67
56
58
-
-
-
63
60
-
50
-
-
-
-
28
-
23
-
Total
COD
mg/1
108
128
112
138
103
119
127
110
-
-
130
176
217
123
155
132
108
126
-
90
132
124
123
95
124
-
98
113
86
-
-
98
135
132
114
133
-
104
92
-
-
90
-
Soluble
COD
mg/1
60
39
40
73
25
35
-
35
-
-
40
72
98
54
49
72
72
54
-
40
24
72
49
64
79
-
53
53
49
-
-
60
49
56
68
30
-
72
84
-
46
-
Total
BOD,
mg/I
-
-
23
32
23
38
-
33
-
-
25
29
29
21
19
40
33
46
40
36
-
18
18
16
17
-
14
17
20
-
-
22
27
28
28
25
-
43
18
15
-
13
—
Soluble
BOD.
mg/i
-
-
-
26
26
5
-
-
-
-
4
5
4
5
9
28
20
25
8
19
-
6
6
11
8
-
2
3
10
—
-
8
6
8
7
7
-
-
9
1
8
7
~
43
-------
APPENDIX A (continued)
Date
08/01/73
08/03/73
08/06/73
08/10/73
08/15/73
08/16/73
08/20/73
08/24/73
08/27/73
09/01/73
09/19/73
09/20/73
09/24/73
09/28/73
10/01/73
10/04/73
10/08/73
10/16/73
10/18/73
10/30/73
11/01/73
11/06/73
11/08/73
11/13/73
11/15/73
11/19/73
11/29/73
12/01/73
12/05/73
12/11/73
12/12/73
01/04/74
01/08/74
01/11/74
01/15/74
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
Total
SS
mg/1
_
-
53
56
49
50
81
81
68
63
96
70
96
86
68
55
62
80
55
57
67
63
56
69
61
65
66
71
69
26
30
53
58
47
59
62
67
84
50
62
58
77
66
63
52
46
114
85
80
123
107
119
156
144
99
45
44
45
17
14
9
19
41
Volatile
SS
mg/1
_
-
45
52
49
45
76
77
65
59
79
62
84
80
66
52
56
56
52
55
58
58
48
65
59
55
54
61
63
20
25
50
45
40
46
60
60
71
50
57
51
67
63
55
47
45
51
66
69
77
82
89
106
98
71
35
39
24
15
14
8
12
24
Total
COD
mg/1
_
-
172
172
120
88
168
204
188
140
132
98
150
118
180
107
120
140
324
176
158
120
124
180
116
52
192
124
126
86
112
166
124
80
172
180
160
200
-
140
160
108
76
108
160
148
188
112
116
140
140
160
208
200
168
204
100
88
152
96
120
-
92
Soluble
COD
mg/1
_
-
120
64
52
88
20
92
80
84
58
78
106
54
43
71
81
118
168
88
72
80
48
80
72
8
72
24
46
68
88
96
108
20
100
72
44
40
40
60
40
52
48
40
32
_
36
20
68
20
80
92
36
48
20
-
52
28
-
-
84
60
62
Total
BOD,
mg/5
_
-
24
19
23
20
21
-
22
20
23
15
13
27
24
21
30
19
24
20
18
18
15
-
30
18
-
-
25
12
14
10
17
20
27
48
31
36
39
29
33
35
31
32
31
31
27
19
17
15
14
19
18
30
22
20
12
21
14
7
13
7
12
Soluble
BOD.
mg/J
-
^
5
9
10
8
4
-
10
14
7
4
5
2
7
4
10
5
5
5
3
2
6
-
6
5
-
-
5
5
5
2
3
6
7
12
10
7
7
10
7
8
5
7
6
5
6
6
6
8
5
4
4
7
-
4
3
4
4
5
8
6
4
44
-------
APPENDIX A (continued)
Date
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12//4
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
Total Volatile
SS SS
mg/1 mg/1
26
45
46
25
42
41
64
64
64
43
53
50
53
38
54
-
70
57
89
61
51
34
62
47
46
44
48
54
46
46
42
46
67
-
53
52
56
59
50
52
59
45
42
49
-
56
59
60
60
61
64
68
69
64
84
43
80
85
77
56
71
61
61
65
13
22
27
18
20
19
54
46
43
36
42
38
49
35
46
-
58
47
41
51
40
29
50
37
33
33
39
42
32
37
31
37
50
-
41
41
45
52
27
38
47
32
37
34
-
40
47
40
49
45
51
57
56
46
65
66
72
69
65
53
67
54
58
56
Total
COD
mg/1
68
64
80
68
100
-
116
104
140
104
100
100
140
-
120
-
125
119
109
107
-
71
139
102
68
81
80
89
82
100
82
92
114
108
92
94
109
94
90
83
83
92
77
91
91
84
106
93
119
111
111
111
136
119
131
129
131
179
128
130
137
129
139
136
Soluble
COD
mg/1
64
_
52
60
-
-
60
60
88
-
-
72
-
-
68
-
52
50
50
44 ,
56
62
48
53
56
57
32
53
35
43
56
44
56
52
46
35
53
37
31
48
46
52
36
51
51
49
58
40
45
59
38
46
65
44
52
56
52
53
53
51
52
48
40
64
Total
BOD5
mg/1
9
12
13
13
18
-
30
22
28
23
16
26
27
14
L7
-
23
25
21
24
11
8
16
15
9
10
11
14
10
9
13
9
15
12
11
13
18
15
18
16
13
10
12
14
16
15
15
9
14
17
14
14
14
15
21
18
17
18
22
21
15
11
15
18
Soluble
BOD,
mg/1
6
6
2
8
5
-
7
5
5
4
2
2
2
2
2
-
4
3
4
6
3
3
4
4
4
3
3
4
2
5
3
3
2
2
5
3
2
2
3
2
2
2
3
4
3
3
4
2
6
6
5
4
4
4
6
5
3
3
4
5
4
6
3
2
45
-------
APPENDIX A rcontinuedy
Date
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
Total Volatile
SS SS
mg/1 mg/1
59
60
48
66
60
89
58
55
78
63
60
59
61
55
62
67
63
65
75
60
59
65
110
70
69
74
62
-
-
-
-
64
71
58
62
56
56
65
60
49
59
56 "
53
40
45
38
35
33
23
23
21
30
32
33
31
47
38
37
39
37
46
54
73
73
52
54
40
58
49
62
52
33
73
53
54
57
54
46
56
57
57
61
64
5.7
54
61
77
56
60
73
52
-
-
-
-
55
57
57
56
43
53
53
50
46
53
45
45
35
35
31
32
29
21
22
15
25
23
31
24
40
29
37
32
23
41
43
62
59
Total
COD
mg/1
126
119
121
113
102
137
140
114
120
124
142
122
132
127
135
135
120
133
133
124
120
140
148
144
146
158
165
-
134
136
134
129
120
122
133
129
145
124
128
126
124
111
127
104
104
-
112
83
88
80
82
103
92
100
-
98
98
102
105
103
104
96
124
138
Soluble
COD
mg/1
48
38
43
43
40
60
58
50
58
55
57
56
58
50
58
59
46
52
62
36
46
60
37
43
64
54
60
-
54
58
-
46
50
40
50
56
60
52
56
54
56
63
71
56
58
-
56
52
49
39
39
41
61
62
56
58
47
59
48
55
50
52
44
56
Total Soluble
BOD. BOD
mg/I mg/1
16
17
10
14
15
17
15
15
22
19
17
16
15
13
14
14
11
12
15
14
12
17
19
17
19
20
14
-
14
13
16
12
15
14
17
18
16
14
17
17
13
15
13
13
17
12
8
16
13
11
12
13
8
16
17
19
15
19
14
18
21
24
32
30
3
3
3
3
3
1
3
3
2
5
6
9
2
7
3
4
3
3
3
4
3
3
4
5
4
4
3
-
3
1
2
4
1
1
1
1
1
1
1
3
2
1
1
1
2
0
2
2
1
2
0
1
2
-
3
5
2
3
3
2
3
4
3
4
46
-------
APPENDIX A (continued)
Date
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
Total
SS
mg/1
57
55
56
57
57
56
58
62
66
41
56
83
73
74
86
81
61
62
66
75
66
70
79
113
58
69
-
-
62
94
113
15
12
68
51
38
44
63
43
47
49
54
60
72
70
65
79
Volatile
SS
mg/1
46
41
44
48
46
47
53
48
58
36
54
61
55
62
65
64
50
56
49
62
61
55
49
94
-
66
-
-
53
53
46
5
12
39
33
34
36
41
35
45
48
43
56
62
69
62
73
Total
COD
mg/1
130
119
119
117
119
118
127
124
157
114
119
141
129
153
153
143
124
124
133
120
134
133
153
143
163
153
-
-
118
122
120
147
163
136
128
-
137
123
116
126
129
117
132
141
139
143
156
Soluble
COD
mg/1
55
53
56
60
54
58
60
63
66
57
60
56
52
67
58
66
50
48
56
46
52
54
58
52
62
63
-
-
56
51
65
96
S3
54
72
71
76
64
62
62
48
56
51
46
46
54
44
Total Soluble
BOD. BOD
mg/j mg/i
22
32
27
25
26
30
24
20
16
27
32
48
39
41
60
44
27
35
30
28
29
31
40
33
41
44
-
-
30
32
26
25
38
31
31
28
26
28
29
30
22
25
30
26
30
23
-
2
5
6
6
7
7
5
5
8
11
5
4
6
6
7
7
4
2
3
3
3
3
6
1
6
5
-
-•
2
6
3
4
5
5
4
4
5
2
6
9
<1
2
6
2
<1
2
-
47
-------
APPENDIX A (continued)
Date
06/01/73
06/02/73
06/03/73
06/04/73
06/05/73
06/06/73
06/07/73
06/08/73
06/09/73
06/10/73
06/11/73
06/12/73
06/13/73
06/14/73
06/15/73
06/16/73
06/17/73
06/18/73
06/20/73
06/21/73
06/22/73
06/23/73
06/24/73
06/25/73
06/26/73
06/27/73
06/28/73
06/29/73
06/30/73
07/01/73
07/02/73
07/03/73
07/04/73
07/05/73
07/06/73
07/07/73
07/08/73
07/09/73
07/10/73
07/11/73
07/12/73
07/13/73
07/30/73
08/01/73
08/03/73
08/06/73
08/10/73
08/15/73
08/16/73
08/20/73
08/24/73
08/27/73
09/01/73
09/19/73
09/20/73
09/24/73
09/28/73
10/01/73
10/04/73
10/08/73
10/16/73
10/18/73
10/30/73
Ammonia
mg/1 as N
_
-
-
4.00
1.22
1.27
.696
.664
.544
.546
.620
.664
.508
.308
1.10
.96
1.96
5.6
3.04
2.64
1.38
.46
.98
1.69
3.56
1.35
4.90
1.33
2,16
1.10
1.18
.72
3.68
1.44
2.74
1.96
3.24
2.84
1.62
.74
-
.40
1.0
3.0
4,6
.4
2.0
4.5
3.0
.4
2.2
1.6
1.0
-
-
-
-
-
-
-
.92
.76
1.64
Total
Phosphorus
mg/1 as F
_
-
-
3.04
3.64
5.10
4.90
2.00
1,65
1.85
-
2.04
1.88
1.45
.98
2.10
3.05
4.90
3.60
4.20
3.15
1.80
1.10
.90
3.4
1.7
1.2
.6
1.7
.8
1.0
1.5
2,5
1.7
3.7
2.5
-
2.0
1.7
.5
-
.5
3.5
3.2
3.6
4.4
3.2
3.4
3,6
2.8
4.1
3.6
4.2
-
3.9
-
-
-
-
5.0
5.0
5,2
5.2
Nitrate
mg/1 as N
_
-
-
.17
.18
.18
.14
.12
.135
.300
-
.410
.300
.580
.220
.220
.320
.320
•4?
-
.19
.16
.13
.18
.16
.29
.22
-
-
Nitrite
mg/1 as N
_
-
-
.008
.006
.0075
.010
.011
.008
.010
.010
.012
.011
.010
.011
.015
,020
.002
.0065
-
.003
.0024
,0024
.0018
.0012
.0015
.0015
.0026
_
48
-------
APPENDIX A (continued)
Date
Ammonia
rag/1 as N
Total
Phosphorus
mg/1 as P
Nitrate
mg/1 as N
Nitrite
mg/1 as N
11/01/73
11/06/73
11/08/73
11/13/73
11/15/73
11/19/73
11/29/73
1.68
1.3
,76
52
.64
1.64
4.8
3.4
3.4
6.0
5.0
5.2
Date
12/05/73
12/11/73
12/12/73
01/04/74
01/08/74
01/11/74
01/15/74
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
Water
Temp
°C
5.0
7.0
6.0
3.0
2.0
2.0
2.0
4.5
4.5
-
4.0
3.5
3.5
1.0
4.5
7.0
-
7.0
7.0
6.5
5-0
7.5
7.5
11.5
12.5
15.0
11.0
10.0
11.0
10.5
8.0
7.0
6.0
10.0
13.0
15.0
15.5
11.0
11.5
12.5
Dissolved
Oxygen
mg/1
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5.7
9.3
8.7
9.8
12.5
PH
_
7.5
7.5
7.8
-
7.6
7.8
-
6.8
8.0
7.3
7,5
7.4
7.7
7.4
7.5
7.4
7.9
7.8
7.4
7.4
8.2
8.4
7.4
8.5
8.1
7.4
8.0
8.2
7.7
7.7
7.6
7.6
7.6
7.7
7.4
7.9
7.2
7.6
8.1
Ammonia
mg/1 as N
-
-
-
-
-
-
-
10.1
10.0
10.0
11.5
13.0
15.0
16.0
12.5
11.5
12.0
18.5
21.0
17.0
18.5
16.0
16.0
12.0
10.5
9.5
12.0
12.0
10.5
10.5
10.0
14.5
12.0
14.5
12.0
10.0
11.5
11.0
12.0
10.0
Total
Phosphorus
mg/1 as P
_
-
-
-
-
-
-
7.3
8.3
8.3
7.0
7.5
7.6
8.6
8.2
8.3
9.4
8.0
8.2
8.0
8.0
8.0
8.0
8.4
7.8
9.5
5.7
4.8
4.7
5.4
5.7
5.7
6,0
6.3
6.8
7.0
7.4
10.3
7.2
6.7
49
-------
APPENDIX A
(continued)
Dace
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/75
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
Water
Temp
°C
14.0
11.9
14.5
17.5
19.0
19.0
19.0
20.0
20.0
19.0
-
20.0
18.9
21.1
20.3
23.0
25.0
25.5
24.0
22.5
25.0
24.0
23.9
22.0
21.5
20.2
22.0
25.0
17.8
25.6
27.0
24.0
25.1
2 A. 3
26.2
26.9
29.0
29.9
30.0
32.0
30.9
28.2
30.5
31.4
29.2
28.4
28.9
27.9
26.2
25.4
22.3
25.2
27.0
26,2
-
-
26.1
25.5
27.1
23,4
22.7
22.5
19.2
18.5
Dissolved
Oxygen
mg/1
14.0
16.4
14.2
16.0
-
12,4
10,0
13.0
10.5
13.9
-
12.4
7.4
4.5
7.5
4.1
4.6
1.0
6.3
4.5
5.5
3.5
6.2
2.9
4.3
6.3
7.8
6.5
4.0
2.2
3.3
7.5
3.6
-
3.5
4.8
4.7
5.5
4.2
7.0
6.1
7.9
7.2
5.6
4.0
2.6
6.5
5.3
5.3
7.0
5.4
6,1
8.1
7.5
-
-
6.9
6.6
2,2
6.2
5.5
5,6
11.3
11.0
PH
7.7
_
8,5
8.4
-
8.6
-
8.2
8.6
8.6
-
9.3
8.8
8.3
8.6
-
8.6
8.5
8.3
8.6
8.9
8.6
8.4
8.6
8.5
8.5
8.8
8.5
8.4
8.7
8.3
8.8
8.7
8.8
8.6
8.7
8.9
8.8
9.0
8.9
8.8
8.5
9.1
9.1
8.7
8.7
8.6
8.8
8.8
8.8
8.8
8.8
9.1
8.9
8.7
8.9
8.9
8.9
8.8
8.6
8.6
8.5
9.4
8.9
Ammonia
mg/1 as N
9.5
9.0
8.0
8.0
6.9
6.9
5.0
8.0
4.4
2.3
-
1.1
0.4
0.7
0.7
0.7
0.2
0.6
0.23
0.16
<0.10
<0.15
<0.26
<0.26
<0.10
<0.10
0.21
0.12
0.20
0.18
0.16
0.13
<0.10
0.20
<0.10
<0.10
<0.10
<0.10
<0.10
<0.10
0.12
0.17
<0.10
<0.10
<0.10
0.14
0.10
<0.10
<0.10
0.18
0.16
0.27
0.30
<0.1
-
0.27
0.15
1.56
2.20
0.23
0.25
3.90
1.75
2.50
Total
Phosphorus
mg/1 as P
6.5
6.5
5.9
4.7
4.7
4.7
3.8
3,4
3.1
3.5
-
2.9
2.6
2.6
2,5
2.4
2,1
2,8
2.0
2,8
2.6
3.0
2.1
2.5
2.5
2.5
2.3
2.2
2.4
2.4
2.4
2.4
1.9
2.1
1.9
1.8
1.6
1-3
1.6'
1.6
1.3
1.7
1.5
1.4
1.7
1.8
1.9
1.8
1.8
1.8
1.95
1.9
1.7
1,8
-
1.9
1.1
-
2.25 -
2.23
1.9
1.6
1.8
1.9
50
-------
APPENDIX A (continued)
Date
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
Water
Temp
°C
22,9
22.4
18.4
20.3
20.3
19.7
18.1
18.1
18.0
16.8
15.0
16.4
14.9
16.0
17.0
13.8
15.1
15.0
13.2
15.1
16.0
16.2
-
15.8
10.7
9.7
9.4
8.1
7.3
7.0
8.9
9.2
11.3
6.1
5.8
3,2
3.0
5.1
6.0
3.8
3.8
4.2
-
2.8
4.0
3.2
2.8
3.9
3,9
3.3
4.0
4.0
4.0
1.8
1.9
2.6
4.0
5.0
3.1
2.4
3.0
2.5
1.5
1.5
0.5
Dissolved
Oxygen
mg/1
9.8
6.6
3.0
6.5
_
4.0
8.0
8.3
7.0
9.3
9.3
6.7
11.0
11.5
6.7
6.6
8.5
10.0
8.4
7.6
11.0
6.0
-
5.8
6.7
6.0
9.2
8.1
10.5
13.5
8.2
12.0
11.5
9.3
_
10.5
11.8
17.2
15.4
13.4
12.6
13.4
_
17,5
16.3
16.4
19.9
16.2
18.5
19.0
19.5
17.0
17.0
19.8
20.0
21.6
20.0
19.2
25.0
25.0
18.5
17.5
-15.0
13.5
10.5
PH
9.2
8.5
8.5
8.4
9.1
8.9
8.9
9.2
8.4
8.9
8.9
8.8
8.9
8.9
8.7
8.7
8.6
8.8
8.8
7.7
8.7
8.5
-
8.3
8.4
7.5
8.2
8.0
8.0
7.9
8.0
7.5
7.9
8.3
7.9
8.2
8.6
8.5
8.2
8.5
8.4
8.3
7.9
8.6
8.6
8.5
8.5
8.6
8.7
8.5
8.5
8.4
8.5
8.3
8.8
8.8
8.7
8.7
8.7
8.9
8.3
8.4
8.6
7.9
8.4
Ammonia
mg/1 as N
0.13
<0.10
1.15
0.52
0.57
0.34
0.20
<0.10
0.15
0.16
0.19
0.25
0.60
1.10
0.90
0.92
-
1.14
0.85
1.14
1.24
1.30
-
-
-
-
.58
-
-
-
.14
.06
0.18
0.15
0.12
0.45
0.24
0.21
0.35
0.37
0.51
0,45
0.45
0.40
0.35
—
0.62
0.46
0.86
1.00
1.20
2.50
3.30
2.40
2.35
2.15
1.95
2.25
2.10
2.80
3.85
3,85
3.02
2.85
3.05
Total
Phosphorus
mg/1 as P
1.8
2.1
2.1
3.6
2.3
2.3
2.3
2.6
3.7
2.2
2.2
3.1
3.3
3.5
3.6
3.8
3.9
3.9
4.2
-
-
4.2
-
-
-
-
2.2
2.2
2.4
2.1
.6
2.6
4.2
4.9
2.8
2.8
3.2
2.5
3.3
3.0
3.0
4.0
3.0
3.1
3.0
3.2
3.6
3.2
2.8
3.2
3.4
3.8
3.0
3.3
5.3
5.8
4.2
3.2
3.7
4.4
3.3
3.4
3.3
3.7
4.2
51
-------
APPENDIX A (continued)
Date
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
Water
temp
°C
1.0
3.0
2,0
2.0
-
4.0
4.0
3.0
-
7.0
4,0
6.0
6.5
3,8
4.2
6.2
7.0
10.0
13.0
12.0
-
-
7.0
7.0
7.0
11.0
10.0
10.0
11.0
13.0
18.0
16.0
18.0
20.0
21.0
21.0
-
21.0
23.0
24.0
22.0
Dissolved
Oxygen
mg/1
16.5
24.5
17.0
17.0
16.0
20.0
9.4
6.4
20.0
0.4.0
17.4
20.0
14.5
13.5
16,8
19.7
20.5
19.0
21.5
12.5
-
-
12.5
13.5
14.5
11.0
8.5
8.5
7.0
11.0
10.0
10.5
6.0
11.5
3.5
12.5
-
15.0
11.0
13.0
-
pH
8.6
8.9
8.7
8.4
8.4
9.3
9.3
8.6
8.9
9-0
8.4
8.5
8,0
8,9
9.0
9.0
8.8
9.2
9.1
9.0
-
-
9.1
8,6
9.0
9.1
8.9
8.9
9.1
9.0
9.0
9.1
8.8
8.9
9.0
8.9
-
-
9.3
9.2
9.0
Ammrm-fa
mg/1 as N
2.75
3.00
2.85
3.64
3.64
2.63
1.84
2.16
2.55
2.45
5,20
4.05
3.70
3.08
2.80
2.06
1.87
1,64
1.25
0.61
-
-
0.82
0.80
0.73
0.73
0.91
0.80
1.08
1.27
1.05
1.00
1.15
0.95
1.34
1.05
1.15
0.41
0.48
0.02
0.01
Total
Phosphorus
mg/1 as ?
3,8
3.7
3.5
4.0
3.8
2.8
1.9
1.4
2.0
1.6
4.2
3.6
3.0
3.0
2.2
1.8
1.8
1.7
1.7
-
-
3.1
2.0
1.0
1.6
2.0
1.8
1.9
1.9
1.8
1.3
1.3
1.3
1.3
1.0
1.2
1.1
0.7
0.7
1.0
52
-------
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
Total
SS
Bg/1
54
70
66
62
67
50
63
62
67
45
48
59
92
76
117
91
118
157
128
129
41
39
33
17
11
12
31
13
20
28
36
24
31
37
44
75
61
46
41
47
56
30
44
56
72
62
56
58
52
33
40
44
51
42
34
44
39
41
40
38
58
-
50
46
Volatile
SS
ng/1
52
59
52
55
63
47
59
57
57
38
46
51
55
62
87
79
87
109
84
79
33
33
19
13
9
11
21
7
13
17
22
15
24
32
33
46
43
42
31
36
51
30
38
49
55
48
42
48
42
30
29
37
37
33
23
31
29
35
33
33
44
-
40
32
Total
COD
mg/1
200
112
_
160
140
172
152
112
-
132
208
148
160
-
148
188
204
208
212
220
102
88
76
80
86
100
-
108
-
76
80
-
108
-
112
-
148
-
108
108
160
132
120
-
141
119
121
93
93
81
93
82
80
73
72
77
69
84
72
82
96
-
90
90
Soluble
COD
mg/1
88
40
_
56
72
56
72
32
40
40
76
72
60
28
56
76
32
52
64
52
40
40
32
76
80
-
84
56
64
52
56
-
-
68
60
84
-
64
72
-
76
64
-
48
56
44
42
48
44
-
53
44
36
36
48
51
43
50
40
48
—
42
39
Total
BOD5
mg/1
42
34
33
37
33
33
33
28
28
29
29
24
19
15
21
24
21
21
34
29
13
15
14
9
7
7
9
12
11
14
8
13
17
-
17
26
31
19
16
28
29
19
21
32
27
22
25
21
20
11
13
19
13
9
9
9
10
9
17
9
14
"•
9
10
Soluble
BOD
mg/1
11
10
7
7
8
7
6
5
6
6
5
6
5
5
5
8
4
3
6
4
5
4
6
6
4
7
6
7
6
5
&
7
4
-
4
5
7
4
1
5
3
2
2
5
3
4
3
5
5
4
3
3
2
4
2
3
1
6
2
2
—
2
4
53
-------
APPENDIX B (continued)
Date
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
Total
SS
mg/1
48
45
37
44
40
34
33
46
53
-
50
47
48
49
54
57
64
58
70
72
60
69
73
59
55
54
60
61
47
42
-
61
58
68
56
53
-
63
55
56
53
54
53
54
51
60
71
58
58
60
124
63
65
64
65
-
56
63
56
67
50
54
Volatile
SS
mg/1
38
41
23
31
31
24
29
34
34
_
33
28
38
39
43
49
53
43
58
58
54
53
59
52
49
48
42
48
45
40
_
54
53
58
45
33
-
55
51
52
51
42
52
47
48
57
56
51
52
58
108
52
53
64
51
_
51
46
54
53
44
48
total
COD
mg/1
95
92
75
95
107
100
89
101
91
_
96
85
98
141
108
100
144
115
127
117
128
120
118
154
120
124
123
140
114
99
_
111
102
137
128
114
-
115
132
114
126
127
121
128
103
131
123
124
120
117
156
132
130
147
159
-
NOT IN
121
114
110
122
122
131
Soluble
COD
mg/1
47
39
27
44
48
52
44
47
47
_
54
48
45
63
38
54
69
64
60
56
52
53
49
59
66
52
44
60
52
41
_
40
32
33
50
46
-
55
55
56
60
46
58
59
42
44
52
40
46
55
41
51
54
46
58
_
OPERATION
42
42
54
46
46
48
Total
BOD.
mg/1
13
13
15
11
10
8
7
7
12
12
10
12
15
13
12
15
14
17
17
11
19
20
18
13
10
12
15
17
19
_
14
10
17
17
15
_
18
16
14
15
13
12
14
8
11
14
13
11
17
24
16
18
22
22
_
13
12
13
17
16
15
Soluble
BOD.
mg/1
2
3
2
3
2
2
4
3
3
5
3
5
6
6
4
4
3
6
6
3
4
5
4
4
6
3
3
4
7
_
4
4
3
4
4
-
4
5
3
3
3
3
4
3
3
4
4
2
4
4
4
5
3
7
_
1
1
1
1
1
1
54
-------
APPENDIX B (continued)
Date
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/7 4
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
Total
SS
mg/1
58
50
43
55
57
50
41
38
33
31
28
23
24
22
28
31
39
34
35
39
41
35
35
46
47
54
62
50
51
54
53
51
53
60
50
37
43
42
48
44
47
81
53
48
51
57
62
56
57
60
75
46
55
60
43
55
71
112
27
22
78
45
37
54
Volatile
SS
mg/1
47
45
41
50
44
46
36
32
27
28
24
21
24
19
27
19
29
27
30
29
36
29
27
39
40
43
49
40
47
45
46
42
44
54
43
34
40
40
37
39
43
70
47
43
48
46
54
54
47
36
63
-
55
40
32
51
42
63
24
22
56
28
36
48
Total
COD
mg/1
120
118
116
116
113
115
98
96
_
106
76
76
72
80
101
88
98
-
94
106
122
95
101
98
108
118
124
104
117
116
109
117
116
123
120
120
114
105
105
109
113
193
126
116
128
129
137
126
129
143
121
155
143
121
107
116
112
138
163
161
174
128
-
149
Soluble
COD
mg/1
56
52
50
48
56
60
50
50
_
52
48
43
41
39
43
59
48
54
60
49
49
48
47
50
52
54
54
49
53
54
56
56
54
56
57
50
57
54
52
56
55
62
52
48
50
52
46
52
44
56
56
40
52
40
50
58
55
61
99
66
60
68
66
66
Total
BOD
mg/1
15
15
16
14
15
13
16
14
13
13
12
11
12
13
8
15
13
19
18
20
15
17
19
26
24
28
26
35
26
24
27
28
24
24
18
22
18
25
22
26
62
37
28
36
28
26
29
34
36
35
40
33
30
21
33
31
32
29
39
32
30
30
38
Soluble
BOD
mg/1
1
1
2
3
i
_
4
2
1
2
1
1
1
2
2
2
0
3
3
3
3
2
2
3
4
2
4
5
4
5
6
5
7
6
6
5
6
3
6
6
5
7
8.
4-.
3
3
5
5
5
8
8
5
6
7
11
6
4
5
5
7
5
7
7
5
55
-------
APPENDIX B (continued')
Date
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
05/16/75
Total
SS
mg/1
48
39
39
31
44
45
52
42
43
73
-
Volatile
SS
mg/1
37
32
37
31
40
45
45
42
43
65
-
Total
COO
mg/1
119
128
114
104
113
119
127
113
121
156
_
Soluble
COD
mg/1
58
62
56
48
56
45
44
50
56
64
_
Total
BOD,
mg/i
27
28
27
19
25
26
25
24
23
_
Soluble
BOD.
mg/5
6
8
7
3
4
9
3
<1
5
-.
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
Water
Temp
°C
4.5
4.5
-
4.0
3.5
4.0
1.0
4.5
5.0
-
6.5
6.5
7.0
4.5
7.5
5.0
11.5
12.0
17.0
11.5
10.0
10.0
11,0
8.0
7.0
6.5
9,0
12.0
15.0
14.0
11.0
10.4
12.5
14.0
12.5
11.6
16.0
17.0
16.5
Dissolved
Oxygen
mg/1
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4.0
5.5
6.5
7.0
7.7
8.2
6.8
8.9
6.5
1.5
1,2
PH
_
6.8
8.0
7.6
7.7
7,4
7.7
7.4
7.5
7.7
7*9
7.8
7.4
7.3
8.1
7.9
7.5
8.1
8.1
7.4
7.9
8.0
7.5
7.7
7.4
7.5
7.5
7.7
7.6
7.6
7-3
7.5
7.9
7,6
-
8.5
8.4
-
8.4
Ammonia
mg/1 as N
10.0
10.0
ioa
12.5
13.0
16.5
16.5
13.0
12.5
12.5
20.0
18.5
17,0
17,0
17.0
18.0
10.5
10,5
9.0
10.5
12.0
10.0
10. 0
10,0
14.0
11.0
10.0
11.0
9.5
13.0
10.5
11.0
8.5
8.5
8.0
6.9
6.9
6.5
6.4
Total
Phosphorus
mg/1 as F
7.5
7.8
8.0
7.3
7.3
7.4
7.9
8.2
8.1
8.4
8.1
8.0
7.8
7.7
8.0
8.6
8.0
8.2
8.2
3.1
5.0
4.9
5,4
5.7
6.0
6.5
6.7
6.6
7.2
7.2
7.6
7.4
6.8
6.7
6.1
5.8
4.8
4.7
4.3
56
-------
APPENDIX B
Date
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/75
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
(continued)
Water
Temp
°C
18.0
19.0
19.0
19.0
18.1
19.0
19.0
20.1
20.0
-
24.8
25.0
25.0
22.0
25.0
24.0
24.1
22.5
22.0
19.8
22.0
24.2
-
25.7
26.5
25.0
25.0
25.1
26.1
26.0
28.0
28.3
29.0
28.1
-
28.0
29.3
30.6
28.9
27.8
28.2
27.8
26.0
25.4
22.9
24.9
26.4
25.9
26.0
_
26.1
25.3
26.8
23.4
22.2
_
18.0
18.8
22.9
22.8
18.4
-
20.7
19.9
18.0
Dissolved
Oxygen
mg/1
1.0
3.6
4.2
3.8
6.3
4.1
3.0
0.6
0.7
0.5
0.7
3.6
5.1
5.0
5.1
3.5
3.6
2.4
4.1
5.1
4.9
4.0
-
3.8
2.8
3.9
2.0
1.8
0.5
0.3
0.2
0.3
0.5
1.6
_
0.6
0.5
0.6
0.5
0.8
0.5
0.8
0.5
0.8
0.8
0..6
0.6
0.5
1.0
-
0.2
0.2
0.2
0.7
0.5
-
9.2
17.8
5.1
3.6
3.7
-
4.1
3.9
6.3
PH
_
8.1
8.5
8.5
8,1
9.2
8.7
8.4
8.5
_
8.1
8.5
8.4
8.5
8.8
8.5
8.3
8.5
8.4
8.3
8.7
8.4
-
8.7
8.3
8.8
-
8.8
8.4
8.5
8.7
8.8
8.6
8.8
-
8.5
8.6
8.8
8.5
8.4
8.5
8.6
8.6
5.5
8.5
8.7
8.8
8.6
8.5
8,7
8.7
8.6
8.6
8.2
8.3
-
9.5
8.7
9.5
8.3
8.4
-
8.8
8.9
8.6
Ammonia
mg/1 as N
4.7
6.0
3.5
1.9
1.2
1,1
0.5
1.1
0.8
1.1
0,9
0.6
' 0.33
0.15
<0.10
<0.15
<0.26
<0.26
<0.10
0.80
0.15
0.15
-
0.12
0.13
<0.10
<0.10
0.11
<0.10
0.30
0.24
0.16
0.24
<0.10
-
0.36
<0.10
0.26
0.15
0.26
0.16
0.30
<0.10
0.22
0.27
0.21
0.22
<0.10
-
0.26
0.23
0.39
1.90
0.95
2.10
-
1.85
1.85
0.38
0.14
1.05
-
0.57
0.44
0.20
Total
Phosphorus
mg/1 as P
3.8
3.4
3.3
3.4
3,1
2.8
2.6
2.9
2.8
3.2
2.2
2.5
2.4
2.6
2.8
2.6
2,1
2.5
2.4
2.6
2.5
2.3
-
2.2
2.5
2.1
2.0
2.2
1.9
1.9
1.7
1.4
1.7
1.7
-
1.6
1.4
1.3
1.8
1.8
1.8
1.8
1.8
1.9
2.0
1.9
1.8
1.9
—
2.0
1.5'
-
2.0
2.1
1.9
-
1.6
1.9
1.9
1.8
2.1
-
2.1
2.3
2.6
57
-------
APPENDIX B (continued)
Date
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/7 4
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
Water
Temp
°C
17.3
19.0
17.2
14.9
17.0
14.8
16.0
17.8
14.2
14.8
15.2
13.5
14.8
17.1
16.5
-
9.2
9.2
7.8
8.0
9.4
8.8
10.9
7.8
7.2
2.5
4.7
5.1
6.0
4.8
3.9
4.2
3.2
3.9
4.2
3.0
2.8
3.7
3.9
3.3
4.0
4.0
3.9
2.0
2.0
2.6
4.0
3.3
2.9
2.5
3.0
3.0
2.0
2.0
1.0
2.0
3.0
2.0
2.0
-
4.0
Dissolved
Oxygen
mg/1
6.3
5.8
6.2
6.7
1.5
6.6
6.3
4.1
6.0
5.7
6.3
' 7.0
5.6
5.4
1.1
-
9.0
6.8
9.4
7.9
7.3
8.4
7.9
8.7
10.7
11.1
10.6
12.2
14.7
11.4
11.2
10.6
11.6
11.2
11.8
12.0
15.0
13.1
12.4
14.2
16.5
15.5
16.8
17.0
14.7
16.5
14.8
17.0
18.8
16.2
13.5
12.5
11.5
9.0
8.0
9.5
11.5
10.5
9.5
11.0
11.9
PH
8.7
8.4
8.7
9.2
8.6
8.7
8.8
8.7
8.6
8.7
8.7
8.7
8.1
8.4
8.3
-
NOT IN
8.2
7.8
7.9
7.8
8.0
7.9
7,8
8.2
7.8
8.3
8.5
8.6
7.4
8,4
8.3
8.3
8.0
8.5
8.5
8.4
8.5
8.5
8.5
7.9
8.7
8.6
8.7
8.2
8.8
8.8
8.7
8.6
8.8
8.8
8.5
8.3
8.2
8.4
8.2
8.5
8.8
8.5
8.3
8.1
8.6
Ammonia
mg/1 as N
<0.10
0.10
0.19
0.19
1.00
0.75
0.93
0.91
1.27
1.70
1.05
1.66
1.76
_
2.70
-
OPERATION
0.45
_
0.22
0.19
0.18
0.19
0.36
0.10
0.13
0.22
0.28
0.09
0.30
0.28
0.34
'0.38
0.44
0.46
0.30
-
0.62
0.50
0.58
1.20
0.84
1.15
1.10
2.40
2.33
2.15
2.15
2.05
1.87
2.30
2.70
2.48
2.36
2.63
2.95
2.75
2.75
3.05
3.23
3.95
3.90
Total
Phosphorus
mg/1 as P
2.6
2.8
2.3
2.2
3.5
3.2
3.5
3.6
3.5
3.5
4.2
4.2
_
_
_
-
'
2.1
2.4
2.4
2,6
1.0
2,4
5.2
3.7
2.8
2.8
2.6
2.4
3.1
2.8
3.0
3.3
3,0
3.5
3.1
3,6
3.2
3.7
3.7
3.6
3.6
3.2
3.7
5.0
3.3
5.9
4.5
4.2
5.2
4.7
3.4
4.4
3.4
3.6
3.4
3.8
3.9i
3.8
3.8
3.9
2.8
58
-------
APPENDIX B (continued)
Dace
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/11/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
05/16/75
Water
Temp
°C
4.0
3.5
-
6.0
4.5
6.0
6.5
4.1
4.3
4.9
7.0
8.0
11.0
11,0
7.9
7,0
7.0
7.0
7.0
10.0
9.0
10.0
11.0
13.0
16.0
15.0
18.0
18.0
19.0
20.0
-
20.0
21.0
22.0
19.2
22.0
Dissolved
Oxygen
mg/1
12.0
11.0
14.0
12.8
4.0
5.0
2.5
_
6.8
6.4
7.0
7.0
3.0
1.0
3.0
3.0
9.5
13.5
7.5
4,5
2.5
5.0
2.5
2.0
1.5
3.5
-
-
2.5
-
-
0
0
1
-
1.5
pH
8.6
8.4
8.2
8.3
8.0
8.2
7.9
8.6
8.7
8.8
8.6
8.7
8.9
8,7
8.8
8.8
8.7
8.6
9.0
9.0
8.7
8.4
8.9
8.8
8.8
9.0
8.7
8.6
8.9
8.7
-
-
9.1
8.9
8.35
9.4
Ammonia
mg/1 as N
3.71
4.25
4.20
3.50
3.40
2.80
2.95
2.24
1.96
1.56
1.49
1.60
0.71
0.95
0,65
1.04
0.50
0.65
0.76
0.42
0.85
0.68
C.73
0.65
0.91
0.91
1.05
1.22
1.54
1.28
1.20
0.98
0.80
0.72
1.50
-
Total
Phosphorus
mg/1 as P
7.0
6.5
2.9
4.4
4.0
4.3
3.6
3.2
2.6
2.8
2.3
2.5
2.2
1.4
1.1
2.1
3.1
0.9
1.3
2.0
2.0
1.8
1.8
1.8
1.8
1.4
1.4
1.4
1.6
1.0
1.0
1.1
1.1
1.0
1.8
-
59
-------
APPENDIX C.
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/7 it
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
Total
SS
mg/1
44
53
53
45
50
46
41
47
47
44
50
71
72
69
84
124
119
93
111
69
70
32
46
27
10
13
18
30
30
31
14
25
25
23
35
61
42
51
41
42
22
17
30
33
48
79
28
36
-
35
33
32
30
20
24
28
22
22
25
17
26
-
31
20
WATER QUALITY, EFFLUENT FROM LARGE ROCK FILTER
Volatile
SS
mg/1
43
40
39
41
47
38
29
44
39
41
43
62
61
60
70
94
83
74
67
47
42
24
29
20
8
12
15
19
22
16
12
14
16
11
28
45
33
51
39
31
20
15
26
28
35
33
20
30
-
33
26
27
24
12
14
16
9
17
20
13
12
-
24
12
Total
COO
mg/1
136
156
160
-
180
140
80
120
38
128
168
132
108
148
156
176
172
140
136
128
100
64
60
72
108
80
-
80
88
80
60
60
-
80
80
100
124
-
100
100
92
-
80
-
95
97
73
77
89
79
75
65
64
67
51
65
59
88
60
62
76
-
74
55
Soluble
COD
mg/1
88
20
20
-
60
24
36
40
72
28
48
56
56
64
36
44
60
40
40
52
32
32
40
56
60
_
-
56
68
-
-
-
52
-
60
64
_
52
52
-
40
-
56
-
60
48
52
42
60
46
50
33
44
57
32
48
47
47
38
40
56
-
42
31
Total
mg/1
26
25
25
29
29
24
24
20
21
22
22
19
13
14
14
20
17
10
29
14
11
12
10
8
7
7
10
16
14
9
-
12
15
-
16
31
19
31
20
32
15
10
13
18
18
16
15
17
12
14
11
15
6
7
7
9
9
8
8
9
9
-
8
14
Soluble
BOD5
mg/1
10
9
6
8
6
6
5
6
6
5
5
6
5
5
11
6
5
4
5
-
5
4
3
4
1
7
6
3
5
4
-
-
5
_
3
8
_
6
2
6
3
3
3
5
4
3
3
7
3
4
4
3
3
4
3
4
4
4
2
4
3
-
4
8
60
-------
APPENDIX C (continued)
Date
06/24/74
06/26/74
06/28/7 *
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
.1/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
total
SS
mg/1
27
22
20
26
26
23
30
23
20
_
34
25
21
20
21
23
19
26
32
30
23
26
31
18
17
17
15
21
21
10
-
42
39
36
28
29
—
38
43
24
24
25
20
25
26
42
28
22
24
32
41
A2
42
30
34
-
49
37
29
40
29
30
Volatile
SS
mg/1
15
20
6
13
19
13
25
13
8
_
18
14
11
13
14
18
11
17
22
20
20
16
21
12
15
14
13
13
10
9
-
38
35
31
21
11
_
25
42
23
21
16
19
21
23
42
22
20
24
32
36
32
38
30
26
-
44
29
28
40
26
30
Total
COD
mg/1
70
53
47
53
55
80
65
65
59
_
64
72
82
61
65
63
90
80
81
85
83
89
89
83
88
90
92
102
82
67
-
83
80
118
112
82
-
103
109
93
83
92
92
88
80
93
91
112
84
76
109
88
101
100
107
-
NOT IN
131
89
70
93
91
95
Soluble
COD
mg/1
51
43
35
44
50
54
44
57
51
60
52
37
59
38
50
67
60
62
58
60
55
69
67
74
56
44
68
60
53
-
38
40
56
56
50
-
67
67
58
56
58
67
63
48
60
58
54
56
*7
53
51
62
46
52
-
OPERATION
75
48
46
58
52
56
Total
BOD,
tog/!
9
8
7
9
6
10
13
9
9
12
9
11
13
5
9
7
8
14
21
9
16
15
12
14
8
10
25
25
28
-
12
11
21
21
18
-
21
20
13
18
15
17
22
12
10
23
22
14
20
12
14
20
24
22
-
11
15
14
15
22
19
Soluble
BOD.
mg/f
4
4
3
5
3
3
7
7
4
_
9
5
7
7
6
6
6
7
8
11
5
7
7
4
5
6
4
18
17
22
-
4
2
10
10
11
—
10
10
5
10
6
9
12
7
5
17
9
4
11
7
5
10
18
7
*•
3
6
4
5
8
7
61
-------
APPENDIX C (continued)
Date
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/74
04/07/75
04/09/75
04/11/75
04/14/75
Total
SS
mg/1
37
28
23
30
35
26
21
26
18
18
15
12
15
19
20
27
20
29
24
27
27
31
35
26
37
41
39
39
42
41
42
39
33
41
48
26
31
29
43
29
26
31
35
68
62
52
49
42
28
45
_
17
48
59
54
38
40
69
2
5
43
37
Volatile
SS
mg/1
29
24
23
28
26
22
17
21
12
18
12
12
15
15
14
19
20
23
16
22
25
28
30
20
30
36
36
31
40
32
37
34
29
37
42
24
28
29
35
24
26
25
34
61
58
44
46
40
22
24
-
'
48
48
38
38
25
26
2
5
24
20
Total
COD
mg/1
94
90
92
88
87
87
78
80
-
74
48
107
62
78
86
90
75
78
84
96
100
93
93
88
90
104
108
98
121
97
111
99
92
111
109
84
94
91
106
82
99
98
104
138
128
143
116
114
86
108
181
127
132
111
84
84
85
85
145
111
92
114
Soluble
COD
mg/1
48
52
48
50
52
67
48
56
-
52
48
56
61
39
47
49
44
56
58
55
55
51
57
50
56
44
60
53
47
68
48
56
52
54
69
54
61
52
52
54
54
58
60
52
56
54
46
48
39
48
56
68
54
54
54
58
49
51
90
54
72
62
Total
BOD,
mg/i
13
14
16
9
13
7
9
12
11
8
8
9
7
11
11
12
11
14
11
15
16
12
13
13
20
28
20
24
27
24
25
26
25
25
26
27
17
16
25
14
20
21
29
35
42
31
31
25
16
42
31
25
30
24
21
17
16
15
19
15
23
29
Soluble
BOD,
mg/1
2
4
2
4
3
1
2
3
2
2
2
2
1
2
3
2
3
4
3
3
3
2
2
3
4
4
4
4
5
4
5
6
8
6
5
3
4
3
7
4
5
5
7
3
6
4
5
4
7
7
7
5
7
8
8
6
6
6
5
6
6
9
62
-------
APPENDIX C (continued)
Date
04/16/75
04/18/75
04/21/75
04/23/75..
04/25/7,5;
04/28/75
04/30/75,
05/02/75-
05/05/75
05/08/75
OS;/10/'7.5
05J/14/75
05/16775
Total
SS
mg/1
36
35
46
33
28
25
39
42
38
47
32
40
-
Volatile
SS
mg/1
34
34,
38'
27
28
25
38
41
35
47
30
38
_
Total
COD
mg/1
_
111
119
110'
106
104
129
121.
M!7;
109
165
128
_
Soluble
COD
mg/1
71
62
64
62
6*
60
61
63
4*
60
70'
72
_
Total
BOD,
mg/!
36
25
24
30,
23;
29
31
32
22
34
3.77
_
Soluble
BOD
mg/i
16
10,
a,
12
8
12
6
14
9
13
18
_
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/J8/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/24/74
03/27/74
03/29/74
Water
Temp
oc
4.5
4.5
-
4.0
3.5
4.0
2.0
5.0
6.0
-
6.0
7.0
6.5
4.5
7.5
7.0
12.0
12.0
17.0 "
11.0
8.5
9.0
10.5
8.0
7.0
6.8
10.0
14.0
Dissolved
Oxygen
mg/1
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
pH
_
6.8
8.1
7.6
7.7
7.7
7.6
7.0
7.4
7.7
7.6
7.8
7.6
7.5
8.1
8.6
7.5
7.9
8.4
7.5
8.0
8.0
7.5
7.7
7.5
7.6
7.7
8.3
Ammonia
mg/1 as N
9.0
9.5
10.0
13.0
13.5
14.0
15.0
12.5
12.0
12.0
19.5
17.0
15.5
16.5
16.0
18.0
9.5
10.0
6.5
7.5
8.5
8.0
4.0
5.2
10.0
6.8
6.6
2.3
Total
Phosphorus
mg/1 as P
6.7
6.0
7.5
7.1
6.5
6.3
7.5
7.7
7.9
8.0
7.3
8.0
7.6
7.4
7.1
6.9
5.8
7.1
6.9
6.4
5.0
5.6
5.7
5.7
7.6
6.0
5.8
5.4
63
-------
APPENDIX C (continued^.
Date
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
Hater
Temp
14.5
18.0
10.5
11.3
12.5
15.0
10.5
14.0
15.0
18.0
16.0
18.0
18.9
19.0
19.0
18.1
19.0
19.0
20.8
19.0
-
25.0
24.5
25.0
22.9
25.0
25.0
25.0
23.0
23.5
18.8
22.5
24.0
-
26.3
26.8
25.5
25.9
25.8
26.2
26.1
27.6
29.0
29-5
28.3
-
28.5
29.6
31.1
29.1
28.0
28.9
27.8
26.4
24.5
23.0
24.6
26.0
25.9
25-8
25.7
26.4
Dissolved
Oxygen
mg/1
11.5
8.8
7.5
6.3
10.0
12.5
7.0
8.3
1.5
4.5
3.5
8.0
1.5
1.0
2.5
0.5
0.3
0.1
0.1
0.1
0.5
1.2
0.2
0.1
0.1
0.1
0.0
0.3
0.1
0.1
0.1
0.1
0.1
-
0.1
0.1
0.0
0.2
0.1
0.3
0.1
1.2
0.1
0.5
0.0
-
0.0
0.5
1.2
0.2
1.0
0.3
0.3
0.2
0.7
0.5
0.5
0.5
0.3
0.3
0.1
0.0
pH
7.5
7.7
7.4
7.4
8.1
7.5
-
8.6
8.5
-
8.5
-
8.3
8.3
8.5
7.9
8.8
8.4
8.4
8.4
-
8.2
8.4
8.4
8.5
8.5
8.4
8.4
8.4
8.3
8.3
8.3
8.4
-
8.2
8.0
8.5
_
8.7
8.1
8.3
8.4
8.4
8.3
8.2
-
8.4
8.4
8.4
8.1
8.0
8.1
8.3
8.2
8.3
8.1
8.2
8.2
8.2
8.1
8.2
8.3
Ammonia
mg/1 as N
5.0
8.5
8.0
6.0
5.5
4.7
5.9
3.0
4.0
2.9
3.3
2.0
6.0
2.3
1.4
1.1
1.4
0.7
1.6
1.9
1.5
1.0
1.0
0.95
0.90
0.90
1.00
0.74
0.95
0.58
1.85
0.85
2.60
-
0.60
1.50
0.80
0.85
1.10
1.20
1.75
1.20
0.90
0.92
1.30
-
1.60
0.69
1.50
2.60
3.00
1.25
1.50
2.30
1.80
3.00
3.50
2.60
1.80
-
3.70
2.10
Total
Phosphorus
mg/1 as P
6.5
6.5
6.8
6.7
6.4
6.3
6.1
5.4
5.2
5.0
4.7
4.3
3.5
3.1
2.9
2.8
2.7
2.6
2.6
2.8
2.9
2.6
2.4
2.4
2.6
2.6
2.4
2.1
2.2
2.2
2.6
2.4
2.3
-
2.1
2.1
1.9
1.8
1.6
1.7
1.7
1.7
1.5
1.6
1.5
-
1.6
1.6
1.7
1.7
1.7
1.5
1.7
1.7
1.6
1.8
1.7
1.7
1.6
-
1.8
1.5
64
-------
APPENDIX C
Date
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
(continued
Water
IF
25.4
25.8
22.5
21.8
_
18.7
18.3
23.2
23.3
18.0
-
21.1
19.2
18.0
17.5
18.2
16.2
15.1
16.0
14.7
15.9
17.2
13.8
14.4
14.1
13.2
15.2
16.1
15.8
-
9.0
7.8
6.8
7.0
8.6
8.5
12.1
6.3
7.8
3.5
4.0
5.8
5.3
3.8
4.7
3.8
2.8
4.0
3.2
3.2
3.5
3.0
4.5
2.8
3.0
3,2
3.2
0.5
1.4
2.0
3.0
)
Dissolved
Oxygen
mg/1
0.1
0.1
0.6
0.2
-
1.7
1.0
0.8
0.2
0.0
-
0.1
0.1
0.2
0.0
0.1
0.2
0.1
0.1
0.2
0.2
0.1
0.0
0.0
0.1
0.5
0.0
0.0
0.0
-
3.0
0.0
0.8
0.5
0.1
0.0
-
0.2
0.7
3.7
2.6
3.0
4.9
2.3
1.6
3.8
2.8
1.7
1.5
4.6
5.1
5.9
2.7
6.2
5.8
8.2
4.3
7.2
4.3
4.1
3.6
pH
8.4
8.3
8.0
8.1
_
9.1
8.4
9.2
8.4
8.2
_
8,4
8.4
8.6
8.6
8.0
8.5
9.0
8.3
8.4
8.4
8.4
8.2
8.3
8.2
8.4
8.0
8.2
8.0
—
NOT IN
7.0
7.6
7.8
7.6
7.5
7.8
7.6
7.7
7.6
8.1
8.0
8.3
7.8
8.0
7.9
8.1
7.6
7.9
8.0
8.1
8.1
8.1
8.1
8.0
8.2
8.2
8.3
8.0
8.2
8.2
8.3
Ammonia
mg/1 as N
1.12
2.00
5.15
2.70
-
3.65
0.90
0.95
0.60
2.60
-
1.15
1.50
1.00
0.54
0.85
2.05
2.52
2.50
-
2.57
1.88
3.30
2.06
1.88
2.16
-
1.80
1.80
-
OPERATION
0.54
1.50
-
1.32
0.93
1.10
0.84
2.00
1.40
1.65
0.90
0.68
0.78
0.58
0.90
0.82
0.82
0.68
0.54
•*
0.58
0.44
0.40
0.54
0.58
0.44
0.58
1.30
1.35
1.25
Total
Phosphorus
mg/1 as F
-
2.0
2.7
1.5
-
1.5
1.6
1.9
1.8
2.3
-
2.1
2.3
2.4
2.3
2.7
2.4
2.2
3.1
2.9
3.5
3.6
3.9
3.1
4.2
4.2
—
-
4.1
-
2.0
3.0
3.0
2.6
2.2
3.2
5.5
6.7
3.0
3.0
2.5
2f
.6
2 "I
.7
3.2
2 A
.8
3 A
.2
34
.1
2f\
.9
3t
.4
34*
.3
2n
.9
3y%
.0
31
.1
3M
.3
3«%
.3
31
.4
3*\
.0
5^
.7
/ A*
4.0
5«
.1
4.7
65
-------
APPENDIX C
Date
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
05/16/75
(continued)
Water
Temp
0C
3.4
2.1
3.2
3.0
2.5
3.0
3.Q
2.0
2.0
3.0
2.0
1.0
-
3.0
4.0
3.0
-
5.0
4.0
6.0
6.5
4.1
4.2
5.6
12.0
7.0
12.0
8.0
6.8
6.5
7.0
7.0
7.0
10.0
9.5
9.0
11.0
13.0
17.0
16.0
18.0
18.0
19.0
20.0
-
19.0
20.0
21.0
19.2
21.0
Dissolved
Oxygen
mg/1
4.9
4.1
5.6
4.5
5.0
2.5
3.0
3.0
6.0
10.0
1.5
2.0
0.5
8.6
2.2
1.6
3.9
4.0
10.4
11.0
5.0
5.7
8.7
10.6
6.0
2.0
2.0
3.0
3.7
4.2
5.5
2.5
8.7
2.0
1.0
1.5
1.0
1.0
1.5
4.0
0
0
0
0
-
0
0
2.5
-
2.5
pH
8.0
8.3
8.3
8.0
7.9
8.2
8.3
8.0
8.2
8.5
8.0
8.1
7.8
8.4
8.1
7,9
7.7
7.9
8.3
8.2
7.4
8.4
8.5
8.5
8.2
8.9
8.5
8.4
8.4
8.6
8.5
8.4
8.7
8.6
8.5
8.7
8.6
8.5
8.5
-
8.0
8.4
8.5
8.4
-
-
8.5
8.0
7.85
8.8
Ammonia
mg/1 as N
0.97
0.93
0.83
0.98
1.10
1.13
1.44
1.56
1.38
1.36
1.50
1.56
1.87
1.44
1.76
2.15
2.09
1.85
0.96
0.91
1.31
1.12
1.29
1.12
0.51
0.39
2.00
0.95
1.02
1.48
2.52
1.25
1.25
1.60
1.71
2.11
2.05
1.54
1.78
1.22
1.47
1.34
1.62
2.50
1.90
1.60
1.80
3.60
2.80
-
Total
Phosphorus
mg/1 as F
5,9
5.2
3.6
4.2
3.9
3.8
4.1
4.2
4.5
4.4
4.7
4.5
5.3
4.4
8.9
8.2
5.8
6.8
3.7
4.8
4.8
5.3
4.3
3.6
3.1
2.4
2.3
2.9
2.4
-
4.2
2.8
2.4
1.8
2.6
3.0
2.3
2.2
2.2
1.8
2.0
1.6
1.9
1.8
2.0
2.1
2.3
1.8
2.1
-
66
-------
APPENDIX D.
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/74
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/i2/74
06/14/74
06/17/74
06/19/74
06/21/74
Total
SS
mg/1
38
. 44
51
52
47
47
54
50
51
42
41
54
61
60
59
114
82
94
85
52
32
42
24
15
12
16
14
21
17
16
15
23
28
19
24
31
35
40
26
24
22
8
27
29
53
81
28
31
40
29
41
38
30
; 20
17
26
18
22
20
19
24
—
34
24
WATER QUALITY
Volatile
SS
mg/1
34
41
47
45
46
44
51
48
45
41
39
52
52
58
55
83
68
76
47
36
25
33
17
14
10
13
13
11
9
13
12
14
19
19
23
26
29
31
33
16
22
8
23
17
38
38
22
15
22
28
32
33
21
12
8
10
11
19
13
13
14
—
27
16
, EFFLUENT
Total
COD
mg/1
_
-
180
196
120
120
104
132
104
136
188
120
144
140
144
160
-
144
152
120
84
100
60
76
80
92
-
104
80
-
-
-
-
80
84
96
120
100
76
84
56
76
88
-
79
87
85
73
69
75
60
65
56
61
48
69
59
61
62
62
66
-
72
63
FROM SMALL ROCK
Soluble
COD
mg/1
24
40
60
20,
52
52
76
56
20
52
28
92
60
56
20
40
-
44
40
80
24
52
44
56
40
80
80
68
64
-
56
-
48
-
44
-
44
-
52
68
40
64
60
-
54
52
44
44
52
50
30
53
48
48
32
48
39
47
40
44
52
—
44
27
Total
BOD5
mg/1
27
23
24
26
32
25
26
21
25
22
20
18
13
13
13
14
18
23
25
17
9
14
7
6
7
15
7
10
9
10
17
13
18
-
14
18
27
16
14
22
15
10
10
17
19
17
19
14
8
16
15
9
7
5
a
7
9
9
6
7
8
••
12
12
FILTER
Soluble
BOD5
mg/1
10
9
6
9
4
6
7
6
6
6
6
6
6
7
5
6
6
4
7
-
6
3
5
5
2
9
6
6
5
5
8
8
4
-
3
4
12
5
3
6
3
3
2
6
4
4
4
5
4
4
3
2
4
3
3
3
6
5
3
4
4
™
5
8
67
-------
APPENDIX D (continued)
Date
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/7 4
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
Total
SS
mg/1
22
17
19
22
23
19
17
25
22
_
26
21
23
23
25
29
27
27
37
37
28
28
31
14
25
23
24
30
19
23
-
44
36
34
28
27
-
41
23
19
16
14
13
16
23
12
19
10
19
16
19
24
28
19
22
-
39
37
26
28
Volatile
SS
mg/1
11
14
9
11
16
9
13
13
11
-
12
12
14
16
21
14
19
18
28
24
26
22
21
11
21
18
21
20
11
23
-
39
34
28
20
3
-
31
15
17
12
12
13
11
19
6
16
8
19
16
17
17
23
19
15
-
34
29
26
28
Total
COD
»g/l
64
53
55
51
55
62
52
73
55
-
68
60
62
86
61
63
100
84
79
81
79
89
79
83
82
86
92
102
74
85
-
85
74
106
104
80
-
101
91
76
68
81
81
82
80
89
77
92
76
74
78
84
86
93
95
'-
NOT IN
106
81
83
73
Soluble
COD
mg/1
43
43
55
48
53
46
48
49
51
_
62
52
41
63
50
50
54
56
62
58
48
55
61
51
62
44
60
60
48
47
-
41
52
68
60
46
-
51
55
66
64
62
71
59
46
60
52
56
64
66
55
53
60
62
60
-
OPERATION
58
46
50
66
Total
BODS
mg/1
8
6
6
7
5
5
7
10
9
_
14
6
13
14
8
7
8
10
10
18
10
11
17
10
11
7
8
15
19
20
-
15
8
18
23
19
-
16
17
10
19
18
14
25
16
10
24
20
11
23
23
13
26
18
23
-
13
11
11
15
Soluble
BOD5
mg/1
4
4
3
3
2
2
5
6
6
_
7
4
5
5
7
4
5
7
7
8
8
7
9
5
4
7
4
5
13
13
-
5
2
8
12
13
-
7
6
4
16
9
6
19
7
6
22
7
3
14
14
5
16
8
12
-
1
3
3
5
68
-------
APPENDIX D (continued)
Date
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
Total
SS
mg/1
17
19
27
24
30
46
42
17
55
60
45
46
46
Volatile
SS
mg/1
16
19
21
21
28
34
35
17
49
52
38
41
41
Total
COD
mg/1
85
79
80
84
82
84
99
105
122
128
_
126
107
Soluble
COD
mg/1
39
48
48
54
50
52
60
44
54
58
_
56
40
Total
BOD.
mg/1
13
15
14
16
19
11
20
6
21
28
27
25
25
Soluble
BOD.
mg/1
3
3
3
3
4
3
2
1
1
4
1
3
2
Date
01/25/74
01/28/74
01/30/74
02/01/74
02/04/74
02/06/74
02/08/74
02/11/74
02/13/74
02/15/74
02/18/7 It
02/20/74
02/22/74
02/25/74
02/27/74
03/01/74
03/04/74
03/06/74
03/08/74
03/11/74
03/13/74
03/15/74
03/18/74
03/20/74
03/22/74
03/25/74
03/27/74
03/29/74
Water
Temp
°C
4.5
4.5
-
4.5
3.5
3.5
2.0
5.0
6.0
-
6.0
7.5
6.5
4.5
7.5
7.0
12.0
12.0
14.0
11.0
9.0
9.0
10.5
8.0
7.0
6.8
9.5
13.0
Dissolved
Oxygen
mg/1
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PH
_
6.6
8.1
7.5
7.7
7.7
7.6
7.0
7.4
7.6
7.6
7.8
7.5
7.5
8.2
8.7
7.5
7.8
7.9
7.5
8.1
8.2
7.5
7.9
7.6
7.6
7.5
8.2
Ammonia
mg/1 as K
10.0
9.5
9.0
12.5
13,5
15.0
16.0
13.0
12.5
12.0
20.0
17.5
17.0
16.0
15.5
14.5
10.0
9.5
7.5
9.0
10.5
5.9
8.0
9.0
14.0
9.5
9.5
5.0
Total
Phosphorus
mg/1 as F
6.5
7.8
7.2
6.7
6.8
5.9
7.5
7.7
7.6
8.0
7.5
7.5
7.4
7.5
7.3
6.9
6.3
7.3
6,2
5.8
5.4
5.2
5.7
5.9
6.2
6.3
6.3
5.4
69
-------
APPENDIX D (continued)
Date
04/01/74
04/03/74
04/05/74
04/08/74
04/10/74
04/12/74
04/15/74
04/17/74
04/19/74
04/22/74
04/24/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/17/74
06/19/74
06/21/74
06/24/74
06/26/7 4
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
Water
Temp
°C
14.5
18.0
11.0
11.3
13.0
14.0
10.5
13.5
15.1
18.0
16.0
18.0
19.0
19.0
19.0
18.5
19.0
19.5
20.8
19.5
-
24.5
24.7
25.1
22.9
25.0
25.0
25.0
23.0
23.8
18.9
22.5
24.9
-
26.7
26.5
25.9
26.1
26.0
26.2
26.2
27.8
29.4
29.6
28.8
-
28.2
30.0
31.2
29.0
28.4
28.9
28.0
26.6
24.6
23.1
24.9
25.5
25.3
25.9
26.0
26.8
25.4
25.9
Dissolved
Oxygen
mg/1
10.0
9.6
4.9
5.5
9.8
13.0
5.8
13.2
1.8
3.5
6.2
5.0
1.8
2.0
1.2
1.3
0.3
0.1
0.1
0.2
0.5
1.0
0.2
0.5
0.1
0.2
0.0
0.3
0.1
0.1
0.1
0.1
0.1
-
0.3
0.0
0.0
0.0
0.1
0.2
0.1
0.5
0.0
0.1
0.0
-
0.0
0.2
0.2
0.5
0.4
0.5
0.3
0.3
0.7
0.5
0.5
0.7
0.2
0.8
0.2
0.1
0.2
0.2
pH
7.6
7.9
7.3
7.5
8.0
7.4
_
8.3
8.3
_
8.4
_
8.4
8.3
8.4
8.0
8.7
8.4
8.4
8.3
-
8.1
8.4
8.3
8.5
8.3
8.4
8.4
8.3
8.3
8.2
8.2
8.2
-
8.3
8.0
8.5
-
8.7
8.1
8.2
8.3
8.5
8.4
8.3
-
8.3
8.4
8.4
8.3
8.3
8.2
8.4
8.3
8.3
8.1
8.4
8.2
8.2
8.2
8.3
8.5
8.4
8.4
Ammonia
mg/1 as N
4.5
10.0
9.0
9.7
5.5
7.2
7.0
5.3
4.9
6.4
4.6
4.7
5.3
2.8
1.8
1.1
1.5
0.8
1.6
2.4
1.8
1.3
1,2
1,2
0.90
1.00
1.20
1.00
1,20
0.83
2,00
2.00
2.70
-
0.65
1,40
1,10
1.95
1.60
1.50
1.85
1.40
0.96
1.70
1.70
-
2,60
1.30
1.65
3.40
3.20
1.70
1.80
3.60
1.70
3.30
2.40
3.10
2.10
-
2.30
1.40
1.60
1.00
Total
Phosphorus
mg/1 as P
6,1
6.4
7.0
6.7
6.5
9.0
6.1
5.9
4.6
5.0
4.3
4.0
3.1
3.0
2.9
2. -9
2.6
2.5
2.5
2.8
2.6
2.6
2.6
2.4
2.6
2.8
2.2
1.9
2.3
2.2
2.5
2.4
2,3
-
1.9
2.0
2.0
1.7
1.7
1.7
1.7
1.5
1.4
1.6
1.5
-
1.6
1.5
1.6
1.5
1.7
1.8
1.7
1.8
1.7
1.8
1.5
1.8
1.7
-
1.9
1.5
-
2.2
70
-------
APPENDIX D (continued)
Date
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19774
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
Water
Temp
°C
22.4
22.0
-
19.1
18.1
23.4
23.7
18.4
-
20.5
19.8
18.0
18.7
18.5
16.4
15.4
16.0
14.7
15.7
17.0
13.8
14.7
14.0
13.0
15.4
16.2
15.8
-
9.1
7.3
6.0
6.8
9.1
8.5
12.0
5.5
7.5
3.0
4,0
6.0
5*0
4.0
5,2
3*8
2.2
Dissolved
Oxygen Ammonia
me/I pH mg/1 as N
0.2
0.1
_
0.4
0.5
0.8
0.2
0.0
-
0.2
0.2
0.2
0.0
0.1
0.2
0.2
0.1
0.2
0.1
0.1
0.0
0.1
0.3
0.0
0.1
0.0
0,0
-
2.1
2.7
6.3
2.7
1.7
0.7
-
4.2
8.3
1.6
9.2
14.4
19.4
19.9
11.8
14.4
12.2
8,1
8.3
_
9.0
8.1
9.1
8.2
8.4
_
8.4
8.4
8.6
8.6
7.9
8.5
8.8
8.4
8.3
8.3
8.4
8.2
8,2
8.4
8.3
8.0
8.0
8.0
-
NOT IN OPERATION
8.0
7.7
7.9
7.6
7.6
7.8
7.6
7.9
7.7
8.2
8.3
8.3
8.3
8.7
8.8
8.7
8.1
5.15
2.4
_
_
_
0.90
0.75
2.60
_
1.05
1.11
1.35
0.75
1.25
2.55
1.50
3,10
-
2.57
3,63
3.30
3.30
2.79
2.57
2.79
2.06
2.67
-
0.85
1.16
1.27
1.65
1.97
2.34
2.16
3.50
3.40
3.20
3.9
3-2
2.95
2.73
2.9
3.2
2.5
Total
Phosphorus
mg/1 as P
2.1
1.6
_
1.4
1.6
2.1
1.8
2.1
-
2.3
3.6
2.0
2,4
3.0
2,2
2.3
3.1
2.9
3.1
3.4
3.8
3.1
3.6
4.1
-
-
4.2
-
2.0
2.2
2.6
3-0
3.2
3.4
5.6
11.2
3.8
4.0
4.0
4.6
3.3
2.8
2.8
3.0
3.0
71
-------
APPENDIX E. WATER QUALITY. DOWNSTREAM TUBE. SMALL ROCK FILTER
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/23/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/7 4
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
Total
SS
mg/1
3
6
19
28
16
22
21
35
40
30
22
26
15
19
23
23
17
21
19
13
12
12
7
10
-
51
29
43
27
34
-
40
37
25
15
15
19
22
16
27
22
15
21
19
22
18
27
30
32
-
48
15
12
18
7
10
17
12
7
13
Volatile
SS
me/1
2
4
17
27
14
16
19
26
30
17
16
17
11
12
12
14
10
18
15
7
12
5
6
1
-
43
26
37
21
14
-
24
23
25
12
12
18
18
13
21
17
14
19
-
20
15
25
30
24
-
43
11
11
17
7
10
10
11
6
13
Total
COD
mg/1
_
-
_
-
_
_
_
63
138
72
82
89
57
74
69
63
70
71
80
_
_
_
_
-
_
119
94
108
104
92
_
97
113
87
80
85
92
94
99
93
79
104
86
84
90
93
89
104
107
_
SOT IN
121
91
95
110
112
112
108
102
96
92
Soluble
COD
me/1
_
_
_
-
_
-
_
61
36
54
66
46
51
55
47
43
68
56
50
_
_
_
_
_
_
38
42
60
58
40
_
51
67
54
56
58
67
55
76
60
69
56
66
70
55
51
64
54
60
_
OPERATION
48
58
50
46
46
54
52
50
48
40
Total
BOD5
mg/1
_
-
_
_
_
-
_
_
_
_
_
_
_
_
_
_
_
_
_
_
w
_
_
_
_
14
9
19
20
12
—
20
15
17
20
14
18
20
39
11
30
25
24
23
26
22
28
23
20
_
8
20
44
31
36
37
31
55
40
39
Soluble
BOD5
mg/1
_
-
-
-
_
-
-
_
-
_
-
_
-
_
_
_
-
_
_
_
_
_
_
_
_
14
3
9
12
6
_
13
4
8
16
4
10
12
>25
6
>23
13
14
16
12
10
15
18
13
2
12
>24
>23 '
30
31
18
54
30
29
72
-------
APPENDIX E (continued)
Date
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
Total
S3
mg/1
12
10
8
13
6
5
6
Volatile
SS
mg/1
8
8
7
9
4
5
6
Total
COD
mg/1
95
95
98
100
100
Soluble
COD
rng/1
75
87
90
86
84
Total
BOD5
mg/1
42
29
42
46
19
8
16
Soluble
BOD,
mg/1
34
16
33
31
13
3
7
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/23/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
Water
Temp
0°
10.8
14.0
11.0
14.9
17.7
18.7
19.4
18.8
20.0
-
25.4
25.2
25.6
25.0
23.8
19.9
24.2
26.4
25.8
29.0
30.3
29.1
25.7
22.3
-
17.3
17.7
23.4
23.2
18.0
Dissolved
Oxygen
mg/1
.0.1
0.3
0.2
0.1
0.0
0.0
0.0
0.0
0.0
-
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
-
0.6
0.5
0.2
0.2
0.1
Total
Ammonia Phosphorus
ph mg/1 as N mg/1 as P
-
_
_
_
_
_
_
- -
- -
_
_
-
_
- -
_
_
_
- -
_
_
8.2 2.30
8.0 3.90
7.9
8.0
_
8.9 0.98 1.6
8.5 0.90 1.8
9.6 0.74 1.9
7.8 0.70 2.2
7.9 2.00 2.1
73
-------
APPENDIX E (continued)
Date
09/17/74'
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/7 4
12/12/74
12/14/74
12/17/74
Water
Temp
0°
-
20.1
20.0
17.5
17.5
18.2
16.3
15.6
16.0
15.0
16.0
17.0
15.0
14.5
15.1
14.0
14.8
15.3
15.9
-
8.9
9.3
9.0
8.0
8.0
8.0
9.2
8.6
8.2
3.4
6.2
4.0
6.0
5.0
4.1
3.9
3.0
Dissolved
Oxygen
mg/1
-
0.1
0.0
0.1
0.2
0.1
0.2
0.1
0.0
0.1
0.2
0.1
0.1
0.0
0.3
0.1
0.0
0.1
0.0
_
1.0
0.0
0.2
0.1
0.0
0.0
0.1
0.1
0.2
0.9
0.3
0.3
0.3
0.3
0.2
0.1
0.0
Ph
-
8.2
8.3
8.5
9.2
8.0
8.4
-
8.2
8.2
8.2
8.1
8.0
8.1
8.2
8.1
7.8
8.2
8.0
_
NOT IN
8.0
7.5
7.6
7.3
7.4
7.6
7.3
7.5
7.3
7.5
7.6
8.1
7.9
7.6
7.6
7.8
7.5
Ammonia
mg/1 as N
X
-
3.00
1.25
1.00
0.71
1.75
1.75
1.40
-
1.75
2.70
3.22
3.42
2.70
2.86
2.21
2.86
2.53
2.42
_
OPERATION
0.65
3.40
5.80
4.50
5.10
3.80
4.90
8.20
9.00
8.60
10.04
10.15
10.30
10.00
7.2
2.8
3.5
Total
Phosphorus
mg/1 as P
-
2.1
2.3
2.7
2.4
2.7
2.3
2.2
-
3.0
3.5
3.6
3.5
2.8
4.2
4.5
_
-
4.1
_
2.0
6.5
4.2
4.4
4.2
3.9
2.4
10.0
8.7
6.1
4.6
4.6
4.4
4.4
3.8
3.7
3.4
74
-------
APPENDIX F. WATER QUALITY, DOWNSTREAM TUBE, LARGE ROCK FILTER
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/23/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
Total
SS
mg/1
7
12
28
39
35
24
19
34
49
30
20
31
21
35
23
27
27
28
34
14
11
9
14
23
-
45
32
33
23
29
-
35
30
22
51
19
20
22
26
20
27
21
26
27
35
37
36
34
44
-
52
39
39
46
39
42
49
38
32
41
40
' Volatile
SS
me/1
4
8
25
35
31
19
18
28
35
18
13
22
13
20
10
14
19
15
24
2
9
8
10
17
-
39
30
27
17
14
-
25
25
22
30
14
20
18
19
18
24
20
25
27
29
28
30
34
36
-
46
50
38
43
37
39
41
34
32
39
32
Total
COD
mg/1
_
_
_
_
_
-
50
98
82
82
78
50
56
55
62
70
84
75
-
-
-
-
-
-
91
72
118
108
96
-
Ill
107
85
93
100
92
97
92
99
91
100
80
82
98
103
99
112
122
-
NOT IN
100
112
87
95
87
97
112
108
100
96
103
Soluble
COD
mg/1
_
_
_
_
_
-
46
46
68
58
53
44
54
46
51
63
49
54
-
-
-
-
-
-
36
36
64
64
48
-
63
65
54
60
54
67
61
69
54
62
54
52
62
47
54
54
54
60
-
OPERATION
46
52
75
54
62
58
84
78
74
84
54
Total
BOD5
mg/1
_
_
-
-
-
-
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
13
7
24
25
17
-
20
16
17
20
19
20
24
25
9
28
29
17
23
20
16
23
27
18
-
12
12
13
15
16
16
17
13
14
10
13
Soluble
BOD,
mg/1
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4
2
15
17
9
-
11
5
18
13
9
13
15
19
4
22
18
5
16
7
7
12
20
10
-
1
4
4
4
4
3
3
2
3
3
2
75
-------
APPENDIX F (continued)
Date
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
Total
SS
TO/1
31
30
26
26
21
26
18
18
16
19
29
22
-
-
24
28
29
29
30
36
41
67
43
55
53
56
53
-
67
118
43
43
41
43
46
37
55
51
51
52
63
53
52
.50
53
85
58
54
65
35
48
65
111
48
35
54
82
49
86
63
55
52
32
36
Volatile
SS
TO/1
28
26
22
22
19
20
15
18
16
14
11
22
-
-
21
28
26
22
28
30
34
64
37
48
44
48
46
-
59
109
35
42
41
34
43
35
49
50
47
51
54
51
50
44
32
73
-
54
43
26
48
40
65
48
35
32
54
48
83
59
51
51
32
35
Total
COD
mg/1
107
92
88
-
90
64
82
72
68
86
74
67
60
76
91
100
97
91
88
118
112
133
118
147
141
123
113
_
119
211
173
96
107
120
122
111
103
115
120
134
135
125
118
121
153
143
189
151
103
109
128
156
148
203
201
126
179
_
216
147
145
124
108
107
Soluble
COD
mB/1
56
46
50
-
54
48
76
45
37
49
51
47
56
64
47
45
51
51
48
54
42
54
45
69
62
50
52
_
60
69
48
53
57
55
54
52
52
52
52
76
54
58
50
39
36
58
46
56.
44
50
56
51
53
101
56
54
72
71
62
64
66
56
60
54
Total
BOD5
mg/1
8
11
15
13
8
10
-
8
10
14
11
15
13
17
15
15
16
15
16
19
25
29
33
32
37
27
32
_
90
41
36
24
22
25
22
29
36
34
26
29
32
26
29
28
35
35
42
33
22
29
26
34
32
36
42
24
45
37
38
26
27
34
23
27
Soluble
BOD5
w/1
<1
2
2
3
2
2
-
1
2
5
2
5
4
4
3
4
3
2
4
4
4
5
4
5
8
6
5
_
11
7
4
6
4
7
4
5
6
7
3
4
4
4
4
6
8
6
5
4
6
6
6
6
8
5
6
6
13
10
6
7
8
9
9
4
76
-------
APPENDIX F (continued)
Date
Total
SS
Volatile
SS
mg/1
Total
COD
Soluble
COD
mg/1
Total
BOD
Soluble
mg/1
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
41
70
29
46
20
41
62
29
40
20
125
147
115
121
190
49
50
56
54
162
25
30
31
28
9
3
15
12
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/23/74
08/31/74
09/03/74
09/05/74
09/07/74
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
Water
Temp
0°
10.7
14.0
10.9
16.2
17.6
18.2
18.2
18.2
18.7
-
24.0
24.1
24.2
24.4
23.3
19.0
24.1
25.7
25.5
28.5
30.1
29.1
25.6
22.0
-
17.8
18.3
23.2
23.5
18.9
-
20.1
20.0
17.8
17.2
19.9
16.5
15.1
16.9
15.0
16.0
17.8
Dissolved
Oxygen
mg/1
0.3
8.8
0.2
0.2
0.0
0.0
0.0
0.0
0.0
-
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
-
0.2
0.0
0.1
0.2
0.1
-
0.0
0.0
0.0
0.1
0.1
0.2
0.2
0.0
0.1
0.2
0.1
PH
_
-
_
_
-
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
8.1
7.9
8.1
8.0
-
9.0
8.3
9.0
7.8
8.0
-
8.4
8.2
8.5
9.2
7.8
8.4
8.7
8.1
8.2
8.2
8.2
Ammonia
mg/1 as N
_
-
_
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3.75
3.10
-
-
-
3.90
1.10
1.95
0.90
2.70
-
1.20
1.51
1.00
0.44
0.90
2.00
2.49
-
3.00
2.39
3.12
Total
Phosphorus
mg/1 as P
'
_
_
_
_
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.6
1.4
2.1
1.9
2.1
-
2.1
2.2
2.0
2.6
2.7
2.3
2.4
3.5
3.4
3.1
3.8
77
-------
APPENDIX F (continued)
Date
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
10/31/74
11/02/74
11/05/74
11/07/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
Water
Temp
0°
14.8
14.3
14.8
13.8
14.9
16.0
15.9
-
9.0
9.3
7.2
6.9
8.9
7.8
10.9
6.5
6.0
1.9
3.6
5.7
5.2
3.5
3.5
3.2
3.0
3.1
3.2
3.2
2.8
3.0
3.7
3.1
3.1
3.6
3.2
1.0
1.5
1.1
3.5
3.6
2.3
3.3
3.0
2.0
1.5
2.0
-
0.1
1.5
1.0
0.2
-
3.0
4.0
2.0
-
5.0
3.5
6.0
6.0
4.2
3.9
Dissolved
Oxygen
mg/1
0.1
0.1
0.2
0.1
0.0
0.0
0.0
-
2.0
0.0
0.4
0.0
0.1
0.1
0.0
0.5
1.3
2.5
2.2
3.2
1.5
3.6
2.0
2.2
2.4
0.9
1.1
1.6
1.3
0.9
0.4
1.4
1.5
-
1.8
1.8
1.1
3.0
2.0
2.6
4.2
3.9
2.5
1.5
1.5
1.0
-
2.0
3.0
1.0
0.5
1.0
1.0
0.9
1.0
1.0
0.5
0.5
1.0
0.5
0.6
1.4
PH
8.1
8.1
8.1
8.2
8.1
8.1
8.1
-
NOT IN
7.9
7.6
8.0
7.6
7.5
7.8
7.7
7.8
7.6
7.8
7.9
7.7
8.0
8.0
7.8
8.1
7.9
7.9
8.1
7.9
7.9
7.8
7.9
8.2
7.9
8.0
8.1
7.8
8.1
8.2
8.2
7.8
8.2
8.2
8.2
7.9
8.2
8.1
-
7.9
8.3
8.1
8.0
7.7
8.1
8.0
8.0
7.7
7.8
7.7
7.9
7.4
8.2
8.2
Ammonia
mg/1 as N
2->0
2.85
2.39
2.50
2.39
2.08
2.27
-
OPERATION
0.27
1.65
0.84
0.60
-
-
0.65
0.52
0.34
0.30
0.40
0.46
0.29
0.26
0.26
0.65
0.40
0.46
0.40
-
0.58
0.66
0.50
0.61
0.52
0.86
0.76
1.90
1.80
1.20
1.15
1.05
.83
.94
2.58
1.02
.83
1.17
-
1.31
1.23
0.90
1.17
1.67
0.67
1.12
1.44
1.33
1.27
1.61
1.00
1.30
-
-
Total
Phosphorus
ma/1 as P
3.9
3.6
4.2
4.1
-
-
4.1
-
2.1
3.0
7.7
2.1
2.5
2.6
3.4
4.0
2.9
2.2
3.5
3.0
2.7
3.5
2.9
3.0
3.2
3.2
3.1
3.2
3.1
3.3
3.2
3.0
3.2
3.2
3.1
3.7
3.6
4.8
5.2
5.2
5.6
3.6
3.2
3.9
3.7
3.8
-
4.4
4.9
4.3
4.1
4.0
4.2
7.4
6.1
5.2
6.6
4.3
4.4
4.0
3.8
2.2
78
-------
APPENDIX F
Date
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/39/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
(continued)
Water
Temp
0°
4.5
9.0
10.0
12.0
8.0
7.0
4.7
6.0
7.0
7.0
10.0
10.0
10.0
10.0
13.0
17.0
15.0
19.0
19.0
18.0
20.0
~
21.0
20.0
23.0
22.2
Dissolved
Oxygen
mg/1
2.6
1.5
0.5
0.5
0.5
2.0
1.9
3.5
1.5
2.0
1.0
1.0
1.0
1.0
.5
.5
0
0
0
0
0
-
0
0
0.5
-
PH
8.3
8.9
8.2
8.7
8.5
8.6
7.7
8.4
8.1
8.8
8.7
8.5
8.8
8.8
8.7
8.6
8.8
8.5
8.5
8.5
8.3
-
-
8.6
8.5
7.2
Ammonia
mg/1 as N
_
0.35
1.33
0.52
1.04
0.69
0.48
0.44
0.45
0.48
0.76
0.73
0.87
1.22
0.83
1.22
0.87
1.10
1.54
1.87
1.35
1.00
0.23
1.60
1.50
7.60
Total
Phosphorus
mg/1 as P
3.3
3.4
4.8
3.9
2.0
0.9
4.2
2.5
2.2
2.5
2.3
2.2
1.8
2.1
2.1
2.2
2.0
2.0
2.1
2.0
2.0
2.0
1.6
1.8
2.0
3.7
79
-------
APPENDIX 6. MATER QUALITY, CENTER TUBE. SMALL ROCK FILTER,
Date
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/31/74
09/07/74
09/14/74
09/21/74
09/28/74
10/05/74
10/12/74
10/19/74
10/26/74
11/09/74
11/16/74
11/23/74
11/30/74
12/07/74
12/14/74
Water
Temp
0°
25.5
25.2
25.7
24.8
23.6
19.0
24.6
26.3
25.4
29.0
30.3
30.0
_
19.0
17.9
20.0
18.9
16.8
18.0
14.9
16.3
9.0
5.8
10.3
1.7
3.8
3.2
Dissolved
Oxygen
mg/1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.3
0.2
0.1
_
8.2
1.9
0.0
0.2
0.1
0.2
0.3
0.8
7.7
0.3
0.3
2.6
0.5
2.2
PH
_
-
-
-
-
-
-
._
_
8.4
8.3
8.0
8.0
8.7
8.3
8.4
7.9
8.1
8.2
8.3
8.6
8.2
7.5
7.7
7.8
7.7
8.1
Total
SS
mg/1
27
32
19
22
26
28
20
24
26
14
14
8
13
58
47
27
14
12
27
35
59
64
58
52
23
15
18
Volatile
SS Ammonia
mg/1 mg/1 as N
15
21
16
16
16
24
15
18
20
10
12
6
7
50
44
25
11
11
24
30
53
52
50
28
21
12
15
-
-
-
-
-
-
-
-
-
1.87
-
3.70
-
-
-
1.25
2.22
2.60
2,43
1.80
1.70
0.24
0.90
1.35
0.70
1.38
-
APPENDIX G
(continued)
UPSTREAM TUBE, SMALL ROCK FILTER
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
Water
Temp
10.6
13.8
11.0
16.2
18.8
19.0
19.5
18.1
18.2
-
25.8
24.2
24.0
24.0
23.0
18.9
Dissolved
Oxygen
mg/1 PH
0.8
1.6
1.8
3.2
0.4
3.0
0.7
1.8
0.2
-
0.8
0.1
1.4
2.2
1.8
5.2
Total
SS
mg/1
35
38
47
90
82
65
130
87
237
242
65
62
31
37
46
48
Volatile
SS Ammonia
mg/1 mg/1 as N
26
30
39
78
67
53
119
73
181
208
58
48
25
29
31
38
80
-------
APPENDIX G (continued) UPSTREAM TUBE, SMALL ROCK FILTER
Date
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/31/74
09/07/74
09/14/74
09/21/74
09/28/74
10/05/74
10/12/74
10/19/74
10/26/74
11/09774
11/16/74
11/23/74
11/30/74
12/07/74
12/14/74
Water
temp
24.8
26.0
25.0
27.9
30.9
29.9
-
21.0
18.7
20.9
17.9
17.0
17.9
15.9
18.8
9.0
6.7
11.9
1.2
5.0
3.3
Dissolved
Oxygen
mg/1
3.5
3.6
3.8
1.9
4.1
0.1
_
13.0
4.7
3.2
0.3
0.5
0.5
10.6
13.0
9.5
3.0
10.4
8.8
15.5
8*4
pH
„
-
-
8.7
8.6
8.1
8.5
8.7
8.2
8.7
8.0
8.2
8.3
8.8
8.8
8.2
7.8
7.9
8.3
8.6
8,2
Total
SS
mg/1
49
49
43
32
40
31
98
60
92
118
198
177
211
197
90
64
79
162
45
90
36
Volatile
SS Ammonia
mg/1 mg/1 as N
42
43
39
24
36
24
70
53
82
92
143
109
142
120
78
51
54
87
34
81
31
_
-
-
<0.1
-
2.90
-
-
0.38
1.15
5.00
-
1.37
1.33
0.34
0.66
0.29
0.33
0.45
0.82
-
81
-------
APPENDIX G (continued) CENTER TUBE. LARGE ROCK FILTER
Date
05/20/7 It
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/31/74
09/07/74
09/14/74
09/21/74
09/28/74
10/05/74
10/12/74
10/19/74
10/26/74
11/09/74
11/16/74
11/23/74
11/30/74
12/07/74
12/14/74
12/21/74
12/28/74
01/04/75
01/11/75
01/18/74
01/24/75
02/03/75
02/07/75
02/14/75
02/21/75
02/28/75
03/07/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/29/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/10/75
05/14/75
Water
Temp
0°
24.1
25.0
25.0
24.3
23.4
18.4
23.8
26.1
25.2
28.9
30.1
29.2
-
18.2
18.6
19.8
18.0
17.0
18.0
14.3
16.0
9.0
6.9
11.0
1.9
5.0
3.7
4.0
3.4
3.3
0.5
3.2
3.3
2.0
1.0
1.0
4.0
5.0
6.0
4.5
9.0
9.0
12.0
8.0
7.1
6.2
7.0
6.8
7.0
10.0
10.0
11.0
11.0
14.0
17.0
15.0
19.0
18.0
18.0
18.0
-
21.0
20.0
23.0
18.4
Dissolved
Oxygen
mg/1 pH
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.2
0.2
0.1
-
0.5
0.1
0.1
0.6
0.3
0.2
0.0
0.1
5.5
3.8
4.5
6.3
6.2
6.4
3.8
4.6
1.5
12.1
9.8
10.0
2.5
4.5
2.5
3.2
3.0
1.0
2.6
4.5
5.0
1.5
2.0
2.5
4.0
6.5
5.5
5.0
1.5
2.0
3.5
1.0
2.0
1.0
0
0
0
0
0
-
0
0
3.0
-
_
-
-
-
-
-
-
-
_
8.4
8.2
8.0
8.1
8.4
8.2
8.2
7.9
8.1
8.2
8.3
8.3
7.9
7.7
7.6
8.2
7.8
8.2
7.9
8.0
8.0
8.2
8.6
8.5
8.3
8.1
8.1
8.2
7.9
7.4
8.3
8.1
8.4
8.8
8.6
8.7
8.5
8.4
8.4
8.9
8.7
8.5
8.8
a. 7
8.7
8.7
8.9
8.6
8.6
8.7
8.6
_
-
9.0
8.9
8.25
Total
SS
mg/1
23
31
28
26
24
26
32
31
29
19
15
13
19
40
32
29
19
13
32
46
55
66
80
52
42
40
26
31
37
41
61
52
67
66
64
74
65
74
102
72
65
98
37
52
87
83
62
63
111
78
38
64
75
46
88
64
57
60
42
55
56
75
60
69
79
Volatile
SS Ammonia
mg/1 mg/1 as N
10
21
17
18
14
16
26
22
23
8
15
9
15
37
31
24
15
12
27
39
49
53
65
44
37
35
24
16
22
29
44
47
56
59
60
71
57
72
89
62
40
88
_
52
65
67
57
40
65
49
36
43
54
46
77
56
53
57
42
50
55
67
59
64
75
_
_
_
-
-
_
-
_
_
1.67
_
2.90
_
_
_
1.01
3.35
9.00
3.13
2.55
1.45
0.18
0.18
0.66
0.41
0.63
0.58
0.94
0.46
0.44
1.75
1.05
1.20
1.27
1.23
1.57
1.08
1.63
1.80
0.21
0.46
1.05
0.32
0.27
0.53
0.51
0.45
0.42
0.66
0.69
0.82
0.95
0.57
1.05
0.75
1.05
1.24
1.62
0.72
0.90
0.57
0.04
0.02
0.03
82
-------
APPENDIX G (continued) UPSTREAM TUBE,,LARGE ROCK FILTER
Date
04/08/74
04/12/74
04/15/74
04/19/74
04/26/74
04/29/74
05/03/74
05/06/74
05/10/74
05/17/74
05/20/74
05/23/74
05/31/74
06/03/74
06/07/74
06/10/74
06/14/74
06/21/74
06/24/74
07/12/74
07/19/74
07/29/74
08/31/74
09/07/74
09/14/74
09/21/74
09/28/74
10/05/74
10/12/74
10/19/74
10/26/74
11/09/74
11/16/74
11/23/74
11/30/74
12/07/74
12/14/74
12/21/74
12/28/74
01/04/75
01/11/75
01/18/75
Water
TeiQp
0°
10.7
14.3
10.6
15.0
17.6
18.5
18.9
I*. 1
18.5
-
24.2
24.7
24.6
24.0
23.2
18.6
24.2
25.9
24.9
27.9
29.9
29.O
-
19.9
18.0
19.9
19.0
16.4
17.3
15.9
16.9
9.2
7.4
11.7
1.8
5,8
3.9
4.9
4.0
3.1
1.0
3.5
Dissolved
Oxygen
mg/1
1.7
4.8
1.1
2.2
0.5
1.9
0.8
0.9
1.0
-
0.3
0.3
0.2
0.9
1.2
1.4
0.2
1.6
2.4
2.3
1.5
0.2
-
8.4
2.3
1,2
0.1
0.5
0.8
6.2
6.4
8.5
7.0
8.0
9.2
13.0
8.5
1.2
1.7
6.2
15.8
14.0
PH
_
_
_
-
-
-
-
-
-
-
_
_
.
-
_
_
-
_
-
8.6
8.7
8.2
8.1
8.7
8.3
8.6
8.1
8.4
8.5
8.6
8.6
8.1
7.8
7.8
8.2
7.9
8.2
8,0
7.9
8.2
8.2
8.5
Total
SS
mg/1
34
33
58
79
52
59
77
64
122
70
23
66
68
40
49
50
48
49
50
27
35
23
32
56
83
63
93
133
81
252
90
71
66
66
46
45
39
16
28
33
48
55
Volatile
SS Ammonia
mg/1 mg/1 as N
25
25
52
66
45
52
59
57
78
51
14
57
60
36
34
40
40
40
42
12
30
19
28
50
73
56
78
112
66
154
79
59
54
51
41
39
34
5
14
27
38
47
_
_
_
_
_
_
.
_
_
_
„
_
_
_
_
_
-
_
-
<0.1
_
2.55
_
-
-
0.80
4.20
8.50
2.20
2.30
0,90
0.27
0.3S
0.61
0.51
0.58
0.66
1.65
0.90
0.64
2.05
1.70
83
-------
APPENDIX H. CHLOROPHYLL CONCENTRATION IN
Cell 3
Effluent
Pate
04/12/74
04/15/74
04/17/74
04/19/74
04/26/74
04/29/74
05/01/74
05/03/74
05/06/74
05/08/74
05/10/74
05/11/74
05/13/74
05/15/74
05/17/74
05/20/74
05/22/74
05/23/74
05/28/74
05/29/74
05/31/74
06/03/74
06/05/74
06/07/74
06/10/74
06/12/74
06/14/74
06/21/74
06/24/74
06/26/74
06/28/74
07/01/74
07/03/74
07/05/74
07/08/74
07/10/74
07/12/74
07/15/74
07/17/74
07/19/74
07/22/74
07/24/74
07/26/74
07/29/74
07/31/74
08/02/74
08/05/74
08/07/74
08/09/74
08/12/74
08/14/74
08/16/74
08/19/74
08/21/74
08/23/74
08/26/74
08/29/74
08/31/74
09/03/74
09/05/74
09/07/74
a
101
210
166
232
204
296
138
253
-
409
250
-
275
247
-
108
127
113
112
192
140
111
141
109
163
93
145
125
110
87
66
73
79
45
48
48
-
52
73
81
79
90
89
97
96
78
91
133
131
109
92
83
106
70
74
68
59
76
60
150
85
b
75
158
132
175
163
218
46
110
-
139
81
-
103
94
-
34
22
52
-
37
91
49
46
43
65
72
45
80
68
78
65
61
76
41
51
51
-
54
83
78
74
78
85
89
98
69
84
122
127
59
79
73
92
57
61
54
54
63
48
139
75
c
98
204
169
226
189
263
68
220
-
247
163
-
97
31
-
48
53
-
24
96
52
85
50
71
76
8
43
112
92
126
96
114
88
64
69
69
-
115
138
116
120
120
136
136
150
109
134
198
195
182
86
107
169
79
52
83
68
69
42
192
125
Rock
Filter
Influent
a
102
128
183
215
221
219
169
-
265
285
310
-
232
232
181
106
112
114
201
158
117
92
122
108
122
116
135
121
88
89
79
78
71
16
37
55
90
-
60
69
41
79
79
79
61
87
108
109
117
77
20
66
79
81
100
60
67
61
-
133
144
b
73
91
144
174
173
163
68
_
87
158
109
-
89
61
37
8
15
5
_
5
26
38
31
37
49
44
53
79
60
84
71
80
67
15
31
48
78
-
62
63
36
71
71
74
56
81
102
103
112
71
26
48
76
78
106
47
57
54
-
131
129
c
74
112
164
230
231
194
109
_
95
252
97
-
88
99
53
39
8
-
112
59
47
67
9
56
57
44
64
106
78
115
113
158
96
38
52
66
120
-
113
105
45
113
113
120
86
140
149
158
170
114
27
181
88
106
162
53
91
56
-
169
204
Large Rock
Effluent
a
82
106
173
122
108
100
61
111
136
124
160
-
115
125
45
245
180
77
45
55
49
75
64
_
58
48
50
35
50
38
29
-
26
31
31
42
25
-
34
30
20
18
28
29
30
40
30
30
32
20
32
33
32
28
22
23
17
16
-
Ill
70
b
64
89
132
93
85
82
18
36
32
45
49
-
33
38
11
68
53
-
81
6
2
30
24
-
24
27
30
23
37
39
29
-
25
32
31
41
27
-
36
33
21
15
32
33
33
45
31
33
35
21
32
6
35
27
21
36
26
54
-
102
32
e
85
88
159
120
111
114
34
29
28
43
49
-
18
52
34
95
103
-
_
6
_
55
26
_
42
20
22
33
27
65
38
-
54
34
30
70
38
-
75
60
41
16
57
72
66
79
56
55
52
41
158
23
104
71
29
78
39
131
-
157
57
Small Rock
Effluent
a
64
84
94
93
66
72
49
56
111
140
-
68
142
102
96
219
259
164
28
38
40
58
56
59
34
32
64
30
37
22
20
18
23
20
28
15
46
_
27
20
28
38
57
72
53
58
75
38
64
31
77
38
50
57
55
57
49
75
-
-
60
b
50
69
74
68
45
63
18
19
26
45
-
70
49
41
22
58
78
33
230
129
16
25
35
32
17
15
28
11
16
24
19
19
17
17
25
13
47
-
35
24
25
43
53
61
52
57
79
43
69
38
69
38
51
85
47
52
58
69
-
-
60
c
47
79
88
73
49
67
32
36
26
35
-
121
31
77
67
101
97
27
_
_
50
31
80
55
13
6
23
10
11
37
22
13
21
33
36
4
73
-
71
44
42
67
97
75
1JQO
93
119
73
115
60
84
86
57
127
76
62
124
96
-
-
94
Note: - .indicates no data
84
-------
APPENDIX H
(continued)
Cell 3
Effluent
Date
09/10/74
09/12/74
09/14/74
09/17/74
09/19/74
09/21/74
09/24/74
09/26/74
09/28/74
10/01/74
10/03/74
10/05/74
10/08/74
10/10/74
10/12/74
10/15/74
10/17/74
10/19/74
10/22/74
10/24/74
10/26/74
10/29/74
11/09/74
11/12/74
11/14/74
11/16/74
11/19/74
11/21/74
11/23/74
11/26/74
11/28/74
11/30/74
12/03/74
12/05/74
12/07/74
12/10/74
12/12/74
12/14/74
12/17/74
12/19/74
12/21/74
12/24/74
12/26/74
12/28/74
12/31/74
01/02/75
01/04/75
01/07/75
01/09/75
01/11/75
01/14/75
01/16/75
01/18/75
01/21/75
01/23/75
01/24/75
01/27/75
01/29/75
01/31/75
02/03/75
02/05/75
02/07/75
02/10/75
02/12/75
a
75
101
134
164
77
299
294
258
335
381
217
372
314
238
429
391
364
384
333
297
254
233
100
177
79
69
105
90
231
193
114
179
167
173
95
127
-
144
132
141
117
124
145
141
186
129
226
98
232
226
245
252
309
394
381
289
325
327
187
259
285
306
287
291
b
72
92
118
145
67
0
0
0
0
0
0
0
0
0
1
4
7
40
2
23
130
127
79
138
76
67
82
117
112
116
83
98
78
92
66
109
-
32
37
39
31
34
42
43
59
44
0
44
106
102
127
125
153
178
156
116
134
137
107
141
153
183
154
154
c
115
131
138
197
117
44
60
29
20
77
50
52'
14
118
72
68
65
199
133
133
204
191
152
224
99
51
95
99
142
127
77
131
206
129
94
78
-
43
38
71
33
67
55
68
105
55
282
68
178
155
193
179
248
258
214
169
221
217
147
181
215
217
244
220
Rock Filter
Influent
a
54
112
141
-
87
286
313
226
194
328
48
295
292
173
388
395
403
361
342
288
217
212
105
157
113
119
105
141
172
170
135
192
160
143
66
108
90
128
115
133
132
133
169
152
208
130
157
132
303
180
0
203
273
292
281
268
313
344
265
212
265
-
290
127
b
54
98
121
-
84
0
3
0
0
0
47
0
0
0
0
0
0
12
0
6
116
120
81
134
86
93
81
121
101
88
75
120
85
71
52
74
54
30
31
27
39
48
67
38
58
35
71
61
145
89
194
106
139
129
109
103
140
143
144
122
150
-
160
67
c
92
160
172
_
107
41
54
18
20
81
123
41
144
19
74
86
62
125
153
102
159
181
95
170
158
127
157
172
112
94
89
186
134
271
65
130
77
82
45
66
57
90
131
64
99
82
126
81
228
137
260
169
204
187
139
184
245
199
277
159
191
-
246
70
Large Rock
Effluent
a
55
57
31
_
63
117
132
89
134
54
88
85
110
62
147
115
122
180
77
114
120
115
144
84
69
48
62
33
79
85
96
81
58
-
37
60
49
61
54
60
76
96
108
160
96
140
133
111
212
173
144
173
226
231
233
237
270
276
208
189
179
213
231
127
b
47
62
25
_
56
0
2
0
1
0
0
2
0
6
1
0
8
13
0
0
67
55
185
71
61
08
46
28
55
57
42
53
00
-
09
47
39
14
19
26
22
37
34
52
38
46
72
45
106
92
75
92
115
112
98
99
122
109
120
113
97
119
132
64
c
87
77
30
_
74
0
45
32
44
0
1
18
0
32
34
25
6
73
0
52
116
88
397
89
99
20
62
26
63
46
102
73
73
-
07
64
67
26
48
28
50
54
48
57
105
200
82
88
172
129
92
129
185
142
122
138
178
163
154
132
141
140
189
124
Small Rock
Effluent
a
41
57
32
-
66
98
91
57
64
51
51
55
33
40
46
159
43
102
66
39
83
63
62
68
50
16
16
21
60
73
99
122
127
34
317
276
198
283
380
b
33
54
31
-
52
0
0
11
0
1
1
6
6
1
4
0
0
10
15
12
55
33
65
55
47
18
02
14
47
46
56
86
80
00
241
187
147
93
121
c
74
91
44
. _
65
0
46
0
28
0
0
6
12
0
24
18
11
41
0
3
91
71
57
72
111
46
00
15
64
54
48
110
100
18
317
267
150
151
159
85
-------
APPENDIX H (continued)
Cell 3
Effluent
Date
02/14/75
02/17/75
02/19/75
02/21/75
02/24/75
02/26/75
02/28/75
03/03/75
03/05/75
03/07/75
03/11/75
03/13/75
03/15/75
03/17/75
03/19/75
03/21/75
03/24/75
03/27/75
03/31/75
04/02/75
04/04/75
04/07/75
04/09/75
04/11/75
04/14/75
04/16/75
04/18/75
04/21/75
04/23/75
04/25/75
04/28/75
04/30/75
05/02/75
05/05/75
05/08/75
05/14/75
a
116
264
314
249
346
394
304
249
275
333
592
662
547
692
913
773
670
-
155
176
159
116
177
192
210
168
164
183
199
186
197
201
250
352
452
357
b
62
135
167
133
187
215
224
148
159
202
99
117
89
109
111
125
100
-
92
100
US
60
116
96
119
116
91
107
118
136
155
142
IBS
251
331
264
c
103
193
233
196
277
343
186
245
238
306
225
262
236
277
282
339
300
-
122
161
121
7*
148
256
152
145
147
141
110
209
206
214
2*7
376
517
394
Rock Filter
Influent
a
165
221
235
201
240
332
268
224
443
345
559
568
466
483
308
669
687
510
138
179
238
288
205
314
213
221
221
212
238
209
128
142
191
249
326
294
b
89
121
122
122
128
184
157
136
93
209
97
247
88
76
54
118
113
77
82
100
150
178
126
172 '
135
142
123
118
137
146
94
104
132
175
238
208
c
118
173
153
157
195
278
245
222
165
301
220
158
234
200
180
277
298
221
132
149
232
275
192
281
252
147
203
276
214
214
130
160
188
255
375
309
Large Rock Small Rock
Effluent Effluent
a
95
125
264
104
101
162
182
397
295
290
443
383
201
370
643
373
475
188
158
112
48
154
129
111
155
211
185
202
219
178
106
151
174
167
266
155
b
49
63
138
52
57
89
114
246
176
164
93
73
37
48
1O4
61
70
35
90
59
51
129
82
1O9
135
136
1O8
109
135
125
72
110
127
122
200
112
c a b c
56
95
201
78
76
119
157
351
261
243
165
174
110
162
276
180
170
101
132
108
69
83
128
48
109
191
171
177
205
182
123
163
184
171
306
168
86
-------
APPENDIX H (continued)
Downstream Tube Downstream Tube
Large Rock Filter Small Rock Filter
Date a b c a b c
04/12/74 71 73 96 40 45 85
04/15/74 88 79 135 48 46 83
04/19/74 96 79 124 84 68 121
04/26/74 58 60 106 30 34 75
04/29/74 40 38 74 34 37 70
05/03/74 43 42 74 59 53 90
05/06/74 61 58 90 89 81 128
05/10/74 72 74 94 104 99 123
05/17/74 35 30 43 38 27 38
05/20/74 34 20 37 30 15 7
05/23/74 45 28 48
05/31/74 38 18 40 48 10 39
06/03/74 46 13 18 34 12 27
06/07/74 58 23 32 47 19 33
06/10/74 63 22 19 26 5 7
06/14/74 50 26 51 22 11 26
06/21/74 54 34 46 30 11 10
06/24/74 54 35 35 37 17 0
09/03/74 ______
09/05/74 - - - 132 117 161
09/07/74 61 57 75 91 133 97
09/10/74 59 54 79 61 56 86
09/12/74 58 56 98 42 45 67
09/14/74 41 36 45 55 52 74
09/17/74 ______
09/19/74 51 43 52 47 44 65
09/21/74 120 8 18 145 1 36
09/24/74 140 7 46 135 14 23
09/26/74 137 0 38 73 0 15
09/28/74 103 3 25 73 0 40
10/01/74 116 1 37 104 5 94
10/03/74 89 0 38 99 0 11
10/05/74 71 0 8 47 0 0
10/07/74 81 4 9 50 0 7
10/10/74 114 0 0 80 5 0
10/12/74 135 11 67 78 0 0
10/15/74 63 13 87 96 0 13
10/17/74 168 0 0 91 8 9
10/19/74 176 8 59 91 3 23
10/22/74 122 9 0 56 1 20
10/24/74 145 17 85 69 0 21
10/26/74 139 80 102 124 69 122
10/28/74 147 83 125 90 54 77
11/09/74 111 83 151 85 81 100
11/11/74 103 81 107 24 26 55
11/14/74 98 87 117 65 76 233
11/16/74 63 61 60 12 09 25
11/19/74 92 76 78 06 08 20
11/21/74 73 62 103 10 11 04
11/23/74 140 88 84 26 08 26
11/26/74 114 64 82 14 00 00
11/28/74 130 60 115 00 15 21
11/30/74 107 55 186 14 11 43
12/03/74 68 34 37 00 00 00
12/05/74 104 64 130 12 15 52
12/07/74 72 36 42 01 00 00
12/10/74 90 56 95 08 00 65
12/12/74 79 50 77 08 07 19
12/14/74 84 31 48 09 18 31
12/17/74 85 22 64 09 00 25
12/19/74 107 19 39
12/21/74 79 30 31
12/24/74 93 31 51
12/26/74 116 44 86
87
-------
APPENDIX H (continued)
Downstream Tube Downstream Tube
Large Bock Filter Small Rock Filter
Date a b c a b c
12/28/74 125 41 71
12/31/74 118 43 85
01/02/75 127 44 78
01/04/75 117 51 79
01/07/75 123 41 78
01/09/75 210 102 125
01/11/75 182 92 143
01/14/75 157 79 80
01/16/75 197 102 145
01/19/75 239 121 191
01/21/75 295 137 220
01/23/75 393 161 231
01/24/75 206 76 127
01/27/75 297 140 216
01/29/75 376 151 252
01/31/75 274 152 224
02/03/75 303 165 325
02/05/75 -
02/07/75 267 176 200
02/10/75 290 161 235
02/12/75 213 115 206
02/14/75 166 95 121
02/17/75 223 121 172
02/19/75 238 129 196
02/21/75 244 137 217
02/24/75 174 100 122
02/26/75 334 194 301
02/28/75 297 180 257
03/03/75 302 195 344
03/05/75 335 202 294
03/07/75 446 269 396
03/11/75 491 92 151
03/13/75 568 118 248
X>3/15/75 410 88 193
03/17/75 376 54 153
03/19/75 499 74 200
03/21/75 995 180 409
03/24/75 377 64 164
03/27/75 305 46 150
03/31/75 189 112 154
04/02/75 248 142 230
04/04/75 294 179 404
04/07/75 434 271 434
04/09/75 379 243 404
04/11/75 186 110 187
04/14/75 451 284 432
04/16/75 352 227 333
04/18/75 415 243 377
04/21/75 338 192 310
04/23/75 379 226 376
04/25/75 332 249 352
04/28/75 132 96 125
04/30/75 -
05/02/75 160 108 136
05/05/75 268 201 272
05/08/75 205 191 203
05/10/75 198 146 223
05/14/75 41 48 86
88
-------
Date
07/19/74
07/29/74
09/21/74
09/28/74
10/05/74
10/12/74
10/19/74
10/26/74
11/09/74
11/16/74
11/23/74
11/30/74
12/07/74
12/14/74
12/21/74
12/28/74
01/04/75
01/14/75
01/18/75
01/25/75
01/31/75
02/07/75
02/14/75
02/21/75
02/28/75
03/07/75
03/15/75
03/17/75
03/21/75
03/29/75
04/04/75
04/11/75
04/18/75
04/25/75
05/02/75
Rock
Filter
Influent
267
266
249
266
252
263
261
268
240
-
248
250
249
244
256
264
270
272
282
278
278
285
290
290
282
291
252
252
254
234
236
254
255
278
290
Upstream
Tube
261
284
251
-
-
-
270
262
252
246
246
252
252
-
264
260
264
264
280
267
266
270
281
279
272
282
236
241
-
236
232
248
268
274
282
LARGE ROCK
Center
Tube
272
280
257
_
-
-
272
268
242
240
246
248
252
-
262
259
264
264
275
264
272
276
275
270
268
278
224
232
-
235
234
247
268
276
283
FILTER
Down-
stream
Tube
278
287
262
272
276
-
_
_
_
_
-
_
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Effluent
263
272
256
286
_
265
264
274
241
_
256
256
250
241
258
262
264
268
273
258
260
287
286
273
276
298
270
248
263
233
238
258
282
274
286
Upstream
Tube
264
280
257
_
_
-
264
258
242
241
252
250
238
-
SMALL ROCK FILTER
Down-
Center stream
Tube Tube
282 276
286 284
252 258
260
266
_
274
264
242
252
260
251
241
-
Effluent
264
273
256
266
_
288
272
276
246
-
276
312
282
292
89
-------
APPENDIX J. ALGAE GENERA. EUDORA CELL 3 EFFLUENT organisms/ml
DATE: June 1974
Blue-Green
Osoillatoria
Green
Chlorella
Scenedesmus
Coelastrum
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Debris
*Present
DATE: July, 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Tetrahedron
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlamydomoras
Chlorogonium
Mallomonas
Debris
*Present
DATE: Aug., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Tetrahderon
Tetradesmus
21
20,100
61,400
4,290
285
3,140
11
*
1
7,100
243,000
2,860
3,700
3,700
5,710
9,300
3,700
9,300
3,700
*
5
11,000
76,600
571
285
3,700
24
19,500
295,000
6,290
571
10,300
0
8 IS' 22
15,000 15,100 11,200
99,400 82,000 62,000
255 0 1,710
285 285
1,140 1,140 1,140
285
2,570 2,570 2,000
3,700 3,700 3,000
3,700 3., 700 3,700
3,700 3,700
12 19 26
24,000 26,600 33,400
102,000 166,000 66,300
4,290 4,570 1,430
857
857 3,710
285 571
5,430 857
29
20,100
50,000
0
1,430
571
571
2,000
9,300
3,700
90
-------
APPENDIX J (continued)
DATE: Aug., 1974(cont'd) 5
Diatoms
Nitzchia
Pigmented
Flagallates
Euglena
Chlamydomonas
DATE: Sept. 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Tetradesmus
Diatoms
Nitzchia
Asterionella
Pigmented
Flagellates
Euglena
Phacus
Chlamydomonas
Debris
*Present
DATE: Oct. , 1974
Blue-Green
Oscillatoria
Ana cyst is
Green
Chlorella
Scenedesmus
Actinastrum
Tetrahedron
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydemonus
Panderina
D*»hrls
857
8,000
9,300
3
33,900
105,000
3,140
857
285
9,300
3,700
3, 700
*
1
34,200
1,800
26,600
2,860
571
571
285
1,430
1,800
3,700
*
12
5,430
8,000
3,700
10
19,800
31,700
1,430
1,430
3,700
3,700
3,700
*
8
29,600
38,000
1,430
3,700
5,710
0
3,700
*
19
17,700
3,700
3,700
17
23,400
33,700
1,700
285
4,860
285
3,000
3,700
15
37,900
1,800
32,000
3,430
857
1,140
4,000
3,700
3,700
*
26
14,300
9,300
9,000
24
15,000
30,300
2,290
857
571
2,000
3,700
*
22
32,400
38,300
3,140
857
7,710
0
3,700
3,700
*
29
34,600
18,000
2,860
571
4,290
3,700
3,700
*
91
-------
APPENDIX J (continued)
DATE: Nov., 1974
Blue-Green
Oscillatoria
Anacystis
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlamydemonus
Debris
*Present
DATE: Dec., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Coelastrum
Ooeystis
Tetrahedron
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydemonus
Polytoma
Pander ina
Higher Forms
Paramecium
DATE: Jan., 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Coelastrum
Ankis tro desmus
12
31,500
46,900
5,140
1,400
1,400
8,290
3,700
3
25,900
25,100
20,000
857
1,400
285
11,000
9,300
1,900
3,700
1,800
7
0
36,300
48,600
4,290
19
38,000
1,800
35,100
8,000
2,300
571
9,710
9,300
3,700
*
10
15,500
43,400
11,400
285
3,700
1,400
10,000
9,300
3,700
9,300
3,700
16
0
51,700
37,100
1,400
26
27,200
3,700
45,400
7,710
1,400
1,400
14,300
9,300
24
951
36,300
13, 700
857
3,700
3,700
3,700
21
0
38,600
29,700
571
31
378
23,100
14,900
9,300
3,700
9,300
3,700
27
0
41,000
50,600
92
-------
APPENDIX J (continued)
DATE: Jan., 1975 (cont'd) 7 ig
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena 3,700 3,700
Phacus 3, 700
Chlamydemonus 3,700 3,700
Polytoma 9,300
Higher Forms
Paramecium
DATE: Feb., 1975 3 10
Blue-Green
Oscillatoria Q 0
Green
Chlorella 50,000 50,000
Scenedesmus 54,000 54,300
Pigmented
Flagellates
Euglena 9,300 9,300
Phacus 9,300 9,300
Chlamydemonus 9 , 300 3 , 700
Polytoma 9,300
Debris *
Higher Forms
Paramecium 3,700 3,700
Rotifers *
*Present
DATE: March, 1975 5 11
Blue-Green
Oscillatoria 0 0
Green
Chlorella 52,600 76,000
Scenedesmus 37,100 60,300
Actinastrum
Diatoms
Nitzchia 1,430
Pigmented
Flagellates
Euglena 8,000 9,300
Phacus 9,300 3,700
Chlamydemonus 3,700 4; 000
— ^— — — _
21 27
100
9,300
9,300 9,300
8,000 1,900
9,300 9,300
1,800
17 24
0 0
20,600 22,600
26,300 0
9,300 9,300
3,700 9,300
3,700 9,300
*
17
0
57,100
29,100
30
100
9,300
3,700
270
Debris
93
-------
DATE: June 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Gomphonetna
Flagellates
Euglena
Debris
DATE: July 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Tetraledron
Diatoms
Nitzchia
Figmented
Flagellates
Euglena
Chlamydomonas
Ghlorogonium
Mallomonas
Higher Forms
Faramecium
Protozoa
*Present
DATE: Aug., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Tetraledron
Tetradesmus
Diatoms
Nitzchia
Asterionella
Figmented
Flagellates
Euglena
Chlamydomonas
Debris
*Present
21
29,900
134,000
2,900
6,900
285
*
1
3,600
136,000
8,300
2,900
13,000
3,700
9,300
3,700
5
22,000
6,300
0
3,700
3,700
3,700
24
26,500
217,000
7,100
8,600
285
8
11,600
66,000
3,700
285
1,800
857
3,700
1,800
12
22,000
63,100
1,100
285
1,800
1,100
1,800
2,400
*
22 29
6,700 23,800
80,300 24,300
2,300 2,000
3,700
1,800
1,800
3,700
3,700 3,700
1,800
1,500
19 26
29,000 38,800
15,500 155,000
2,000 579
9,300
285
2,300 1,700
9,700
3,400
1,800 9,300
1,800 9,300
94
-------
APPENDIX K (continued)
DATE: Sept., 1974 3
Blue-Green
Anacystis
Green
Chlorella
Scenedesmus
Actinaatrum
Tetraledron
Tetradesmus
Diatoms
Nitzcbla
Asterionella
Pigmented
Flagellates
Euglena
Chlamydomonas
Higher Forms
Parameclum
DATE: Oct., 1974 1 8
Blue-Green
Osclllatoria 33,800 23,500
Anacystis 1,100
Green
Chlorella 44,300 23,100
Scenedesmus 3,400 2,000
Actinastrum 571
Tetraledron 285
Tetradesmus 1,700
Diatoms
Nitzchia 3,100
Pigmented
Flagellates
Euglena 1,800 1,800
Phacus 1,800
Chlamydomonas 1,800 3,700
Debris *
Higher Forms
Rotifera 1,800
*Present
DATE: Nov., 1974 12
Blue-Green
Oscillatoria 36,700
Green
Chlorella 40,900
Scenedesmus 6,000
Actinastrum 571
Tetradesmus 3,400
Diatoms
Nitzchia 9,400
Pigmented
10
16,000
26,300
857
3,700
3,700
3,100
1,800
1,800
15
36,500
30,000
3,700
857
1,100
7,700
3,700
1,800
*
19
29,000
62,600
11,400
1,100
1,400
9,142
17 24
17,300
34,900
2,000
3,700
857
3,700
1,800
22 29
35,000 35,000
37,400 18,300
2,300 3,400
2,000 3,100
1,100
6,300 8,900
1,800
*
26
22,400
38.300
11,400
1,800
8,900
95
-------
APPENDIX K (continued)
DATE: Nov., 1974 (con1 t)
Flagellates
Euglena
Chlamydomonas
Debris
Higher Forma
Protozoa
DATE: Dec., 1974
Blue-Green
Osclllatoria
Anacystis
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrura
Coelastrum
Diatoms
Nitzchia
Gomphonema
Pigmented
Flagellates
Euglena
Fhacus
Chlamydomonas
Carteria
Pandorina
Debris
Higher Forms
Paramecium
*Present
DATE: Jan., 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Coelastrum
Ankistrodesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydomonas
Polytoma
Higher Forms
Paramecium
12
1,800
3
22,400
58,600
12,300
857
1,400
9,100
285
9,300
3,700
*
3,700
7
0
25,700
27,100
281
1,800
1,800
19
3,700
3,700
*
9,300
10
16,200
56,000
20,900
6,000
9,300
9,300
3,700
16
0
54,000
39,700
1,800
1,800
1,800
3,700dead
3,700
9,300
26
3,700
9,300
*
24
1,000
1,800
32,900
13,700
571
1,800
3,700
1,800
3,700
3,700
21
1,800
48,000
43,000
2,300
2,300
571
1,800
9,300
1,800
9,300
1,800
31
173
60,900
18,300
3,700
3,700
3,700
9,300
3,700
27
0
43,400
50,600
1,800
9,300
9,300
9,300
96
-------
APPENDIX K (continued)
DATE: Feb., 1975
Blue-Green
Oscillatoria
Green,
Chi£o
-------
APPENDIX L. ALGAE GENERA, LARGE ROCK FILTER EFFLUENT
DATE: June, 19 74
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Coelastrum
Diatoms
Nitzchia
Figmented
Flagellates
Euglena
Debris
*Present
DATE: July, 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Chlorococcum
Actinastrum
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlorogonium
Pandorina
DATE: Aug.. 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlamydomonas
Pandorina
Debris
*Present
21
54,200
120,000
1,100
286
1,100
285
*
1
919
68,600
571
3,700
1,100
3,700
3,700
5
1
14,900
7,700
3,700
0
3,700
1,800
1,800
24
4,700
277,000
285
571
1,100
11
8 22 29
11 11 292
1,700 7,700 10,000
2,700 8,000
3,700
0 0 8,000
0 3,700 9,300
9,300
12 19 26
692 4,500 3,630
8,900 29,400 25,400
1,000
0 0 900
3,700 0 3,700
3,700
* *
98
-------
APPENDIX L (continued)
DATE: Sept. 1974
Blue-Green
Oscillatoria 11,
Green
Chlorella 12,
Scenedesmus
Actinastrum 1,
Oocystis
Diatoms
Nitzchia
Gomphonema 1 ,
Pigmented
Flagellates
Euglena 3,
Debris
DATE: Oct., 1974
Blue-Green
Oscillatoria 9,
Anacystis 1,
Green
10 24
500 6,800
600 12,600
571 1,400
850
3,700
571 1,400
142
700 0
*
1 8 15 22
400 13,000 14,800 22,500
850
Chlorella 8,900 9,700 8,300 20,300
Scenedesmus 1,100 7,000 283 1,700
Actinastrum 1,850 857 1,143
Diatoms
Nitzchia
Pigmented
Flagellates
571 7,000 857 5,100
29
25,900
20,900
1,700
2,600
Chlamy domonas 1 , 850
Debris
*Present
DATE: Nov., 1974
Blue-Green
Oscillatoria 19,
Anacystis
Green
Chlorella 23,
Scenedesmus
Chlorococcum
Tetradesmus
Diatoms
Nitzchia 2,
Pigmented
Flagellates
Euglena 3,
Phacus 1,
Chlamydomonas
* * *
12 19 26
800 16,100 12,200
1,850
400 25,900 10,000
571 1,700 2,000
1,850
571
000 2,900 857
700 0 3,700
850
3,700
99
-------
APPENDIX L (continued)
DATE: Dec., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Oocystis
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydomonas
Higher Forms
Protozoa
*Present
DATE: Jan., 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Ankistrodesmus
Diatoms
Nitzchia
Pigmented
flagellates
Euglena
Phacus
Chlamydomonas
Polytoma
Higher Forms
Protozoa
DATE: Feb., 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
3 10
10,700 5,200
26,900 19,700
8,300 9,100
571
857
5,100 3,400
3,700 9,300
1,850 9,300
3,700 9,300
*
7 16
1 0
32,600 36,300
22,600 29,400
0 0
0 0
1,850
0 3,700
3,700
*
3 10
0 0
40,000 35,700
40,000 35,400
24
700
30,000
15,700
2,000
8,000
3 , 700
3,700
21
8,000
42,000
35,700
2,600
0
0
3,700
9,300
*
17
0
12,600
16,600
31
250
36,600
17,400
0
3,700
0
24
0
30,300
18,000
100
-------
APPENDIX L (continued)
DATE; Feb.. 1975(cont'd) 3 10 17 24
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydomonas
Debris
*Present
DATE: March, 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlamydomonas
Chlorogonium
8,000
9,300
1,850
3,700
5
0
28,000
22,000
7,700
7,000
1,850
7,000
9,300
0
3,700
3,700
1,850
*
11
0
24,300
20,600
0
8,000
1,850
9,300
0
3,700
1,850
1,850
17
0
63,400
18,000
8,000
1,850
3,700
9,300
3,700
1,850
27
1,900
52,900
7,100
857
3,700
1,850
1,850
29
1,800
40,300
4,600
S71
3,700
0
0
Debris
*Present
101
-------
APPENDIX M. ALGAE GENERA. DOWNSTREAM TUBE IN LARGE ROCK FILTER
DATE: Sept., 1974
Blue-Green
Oscillatorla
Green
Chlorella
Scenedesmus
Oocystis
Actinastrum
Diatoms
Nitzchia
Gomphonema
Pigmented
Flagellates
Euglena
Phacus
Debris
Higher forms
Rotifera
*Present
DATE: Oct, 1974
Blue- Green
Oscillatoria
Anacystis
Green
Chlorella
Scendesmus
Actinastrum
Tetradesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Chlamydomonas
Debris
Higher Forma
Nemotoda
*Present
DATE: Nov., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Diatoms
Nitzchia
10 24
11,900 7,200A
12,600 5,400
3,700 3,700
571
3,700
571 3,700
1,400
1,800
1,800
*
3,700
1 8 15
11,100 12,900 17,000
9,400 2,900 11,400
3,700 0 285
285
1,800 - 1,700
1,800 1,800
* *
1,800
12 19 26
24,000 28,500 21,600
18,600 42,600 18,600
857 7,400 2,300
285 2,000 857
3,400 7,700 9,100
22 29
22,300 32,500
Clumps
10,300 18,000
857 2,300
285 2,600
1,100
102
-------
APPENDIX M (continued)
DATE: Dec., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Oocystis
Coelastrum
Tetradesmus
Diatoms
Nitzchia
Pigment ed
Flagellates
Euglena
Phacus
Chlamydomonas
Higher Forms
Paramecium
DATE: Jan. , 1975
Blue-Green
Green
Chlorella
Scendesnms
Chlorococcum
Coelastrum
Ankistrodesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Phacus
Chlaraydomonas
Chlorogonium
Polytoma
Higher Forms
Paramecium
Rotifera
3 10 24
13,800 4,000 200
49,100 34,000 15,700
14,600 7.400 4,000
857 285
857
571
285
9,100 6,900 900
1,800
1,800 1,800
3,700
7 16 21
000
22,000 56,300 15,700
18,200 38,600 13,700
2,600 3,100 285
3,100 285
1,800
3,700
3,700 3,700
9,300 3,700
3,700 9,300
9,300
*
31
184
30,600
11,700
3,700
3,700
27
0
28,900
33,000
1,800
3,700
3,700
3,700
*Present
103
-------
APPENDIX M (continued)
DATE: Feb. 1975
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Figmented
Flagellates
Euglena
Phacus
Chlamydomonas
Carteria
Debris
Higher Forms
Paramecium
3
47,700
42,600
500
9,300
1,800
3,700
1,800
10 17
200
47,100 13,700
76,000 16,000
3,700 3,700
3,700 3,700
1,800 3,700
*
1,800
24
26,300
29,400
9,300
3,700
1,800
*
Cyclops
stirring
*Present
DATE: March 1975 5 11
Blue-Green
Oscillatoria Rare
Green
Chlorella 22,900 29,700
Scenedesmus 38,600 40,000
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena 9,300 3,700
Phacus 9,300 1,800
Chlamydomonas 1 , 800 3 , 700
17
Rare
44,300
32,900
Seen
3,700
900
9,300
27 29
2,400 2,700
36,000 34,900
11,400 54,000
857 2,300
9,300 3,700
104
-------
APPENDIX N. ALGAE GENERA. SMALL ROCK FILTER EFFLUENT
DATE: June 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Debris
DATE: July 1974
Blue-Green
Oscillatoria
Anacystls
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlamydomonas
Chlorogonium
DATE: Aug., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Chlamydomonas
Higher Forms
Nemotoda
*Present
21 24
8,756 3,600
188,000 227,000
300 300
2,600
*
1 8 22 29
541 0 541 184
1,800
24,000 6,900 52,900 15,100
300 300 11,700 0
271 1,800
3,700
4,000 9,300 1,800 3,700
4,000
5 12 19 26
64 11 508 324
4,600 10,600 20,900 15,700
36,600 44,600 143,700 128,000
1,500
3,700 1,800
3,700 3,700
* *
105
-------
APPENDIX N (continued)
DATE: Sept, 1974 10
Blue-Green
Oscillatoria 11,600
Green
Chlorella 14,300
Scenedesmus 1,400
Diatoms
Nitzchia 271
Pigmented
Flagellates
Euglena 1,800
Phacus 1,800
Debris *
Higher Forms
Faramecium
*Present
DATE: Oct., 1974 1
Blue-Green
Oscillatoria 7,000
Anacystis 271
Green
Chlorella 1,100
Scenedesmus 857
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Debris
Higher Forms
Protozoa
*Present
DATE: Nov. 1974 12
Blue-Green
Oscillatoria 15,500
Green
Chlorella 13,400
Scenedesmus 857
Actinastrum 271
Oocystis
Diatoms
Nitzchia 2,000
Pigmented
Flagellates
Euglena
Chlanydomonas
24
4,900
8,900
571
857
1,800
*
1,800
8 15 22 29
5,300 4,300 12,500 13,000
271 * 571 271
6,300 Rare 10,600 6,300
300 857 571
857 * 2,700 1,400
*
*
*
19 26
3,600 76
19,700 10,900
857 857
571
1,700 571
3,700 3,700
3,700 3,700
106
-------
APPENDIX N (continued)
DATE: Dec., 1974
Blue-Green
Oscillatoria 0 0
Anacystis 1,800
Green
Chlorella 16,900 0
Scenedesmus 2,900 3,700
Coelastrum 571 571
Oocystis 857
Diatoms
Nitzchia 2,300 *
Figmented
Flagellates
Ehacus 1,800
Chlaaydomonas 9,300 9,300
Higher Forms
Paramecium 3,900
*Present
107
-------
APPENDIX 0. ALGAE GENERA, DOWNSTREAM TUBE IN SMALL ROCK FILTER
DATE: Sept. 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Diatoms
Nitzchia
Gomphonema
Flgmented
Flagellates
Euglena
Phacus
Chlamydomonas
Debris
DATE: Oct., 1974
Blue-Green
Oscillatoria
Green
Chlorella
Scenedesmus
Actinastrum
Diatoms
Nitzchia
Pigmented
Flagellates
Euglena
Debris
Higher Forms
Paramecium
Protozoa
*Present
DATE: Nov., 1974
Blue-Green
Oscillatoria
Anacystis
DATE: Dec., 1974
10 24
8,800 9,300
'
12,300 11,700
1,400
3,700
1,100
3,700
1,800
1,800
1,800
* *
1 8
12,000 8,000
9,700 2,300
571 1,800
3,700
857
1,800
3,700
1,800
12 19
2,300 500
1,800
3 10
Cloudy.
No identi-
fiable or-
ganisms .
15 22 29
5,900 8,000 19,000
6,000 Rare 10,300
285 Normal 1,700
flora
285 1,700
571 3,700
*
1,800 Seen
26
Rare
All normal
flora pre-
sent but
rare.
108
-------
. REPORT NO.
EPA-600/2-79-011
TECHNICAL REPORT DATA
(Please read Instructions on the reverse before completing)
2.
3. RECIPIENT'S ACCESSION-NO.
4. TITLE AND SUBTITLE
REMOVAL OF LAGOON EFFLUENT SUSPENDED SOLIDS
BY A SLOW-ROCK FILTER
5. REPORT DATE
June 1979 (Issuing Date)
6. PERFORMING ORGANIZATION CODE
7. AUTHOR(S)
Walter J. O'Brien and Ross E. McKinney
8. PERFORMING ORGANIZATION REPORT NO.
. PERFORMING ORGANIZATION NAME AND ADDRESS
Environmental Health Research Laboratory
University of Kansas
Lawrence, Kansas 66045
10. PROGRAM ELEMENT NO.
1BC611, SOS #3, Task D 1/18
11. CONTRACT/GRANT NO.
68-03-0280
12. SPONSORING AGENCY NAME AND ADDRESS
Municipal Environmental Research Laboratory—Gin.,OH
Office of Research and Development
U.S. Environmental Protection Agency
Cincinnati, Ohio 45268
13. TYPE OF REPORT AND PERIOD COVERED
Final, 1973-1975
14. SPONSORING AGENCY CODE
EPA/600/14
15. SUPPLEMENTARY NOTES
Project Officer: Ronald F. Lewis, (513) 684-7644
16. ABSTRACT
The objective of this project was to examine the removal of algae cells and other
suspended solids contained in the effluents from facultative lagoons treating domestic
wastewaters by means of rock filters. Two rock filters were constructed and opera-
tional over a 16 month period to determine the operating characteristics of the rock
filter systems. Both rock filters removed essentially the same amount of suspended
solids but the small rock filter clogged after 11 months operation. Biological
activity within the rock filter was noted by the changes in dissolved oxygen concen-
trations. The data indicated that it was not possible to obtain effluent suspended
solids concentrations below the desired 30 mg/1 for municipal wastewater treatment
systems
tently below the 30 mg/1 effluent criteria.
The BOD^ concentrations in the effluents from the rock filters were consis-
17.
KEY WORDS AND DOCUMENT ANALYSIS
DESCRIPTORS
b.lDENTIFIERS/OPEN ENDED TERMS
c. COS AT I Field/Group
*Filtration
Effluents
*Lagoons (ponds)
*Algae
*Wastewater lagoons
(ponds)
*Algae separation
Rock filter
13B
8. DISTRIBUTION STATEMENT
Release to public.
19. SECURITY CLASS (ThisReport)'
unclassified
21. NO. OF PAGES
117
20. SECURITY CLASS (Thispage)
unclassified
22. PRICE
EPA Form 2220-1 (9-73)
109
*USGPO: 1979 — 657-060/1659
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