U.S. ENVIRONMENTAL PROTECTION AGENCY
               NATIONAL EUTROPHICATION  SURVEY
                        WORKING PAPER SERIES
          PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
                        An Associate Laboratory of the
             NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
                                 and
       NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
•&GPO	697-O32

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                               REPORT
                                 ON
                          OCCOQUAN  RESERVOIR
                            FAIRFAX COUNTY
                              VIRGINIA
                            EPA REGION4V- JET
                        WORKING PAPER No,
    WITH THE COOPERATION OF THE
VIRGINIA STATE WATER CONTROL BOARD
              AND THE
     VIRGINIA NATIONAL GUARD
             JUNE, 1975

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                               CONTENTS
                                               Page
  Foreword                                       1i
  List of Virginia  Study  Lakes                    iv
  Lake and Drainage Area  Map                       v

  Sections
  I.   Conclusions                                 1
 II.   Lake and Drainage Basin Characteristics      4
III.   Lake Water Quality  Summary              '    5
 IV.   Nutrient Loadings                           9
  V.   Literature Reviewed                        15
 VI.   Appendices                                 16

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

OBJECTIVES

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

ANALYTIC APPROACH

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

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

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

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

LAKE ANALYSIS

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

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

ACKNOWLEDGMENT

    The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Virginia State Water Con-
trol Board for professional involvement and to the Virginia
National Guard for conducting the tributary sampling phase of
the Survey.

    Eugene T. Jensen, Executive Secretary of the State Water
Control Board; Michael A. Bellanca, Director; Jean W. Gregory,
Pollution Control Specialist; and Robert W. Pitchford, Pollution
Control Technician; Bureau of Surveillance and Field Studies;
provided invaluable lake documentation and counsel during the
Survey, reviewed the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.

    Major General William J. McCaddin, the Adjutant General of
Virginia, and Project Officer Lt. Colonel James D. Manley, who
directed the volunteer efforts of the Virginia National Guardsmen,
also are gratefully acknowledged for their assistance to the
Survey.

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                                iv
                  NATIONAL EUTROPHICATION SURVEY
                           STUDY LAKES
                        STATE OF VIRGINIA
LAKE NAME
Bluestone

Chesdin

Chickahominy
Claytor
0. H. Kerr


0. W. Flannagan
Occoquan
Rivanna
Smith Mountain
COUNTY
Giles, VA; Mercer,
  Monroe, Summers, WV
Amelia, Chesterfield,
  Dinwiddie
Charles City, New Kent
Pulaski
Charlotte, Hallifax,
  Micklenburg, VA;
  Granville, Vance,
  Warren, NC
Dickenson
Fairfax, Prince William
Albemarle
Bedford, Franklin,
  Pittsylvania

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OCCOQUAN RESERVOI
    Tributary Sampling Site
 X  Lake Sampling Site
    Sewage Treatment Facility
 il  Drainage Area  Boundary

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                            OCCOQUAN RESERVOIR
                             STORE! NO. 5108

I.  CONCLUSIONS
    A.  Trophic Condition:
            Survey data indicate that Occoquan Reservoir is eutrophic.   Of
        the eight lakes sampled in Virginia in 1973, it ranked last in  over-
        all trophic condition when compared using a combination of six
        parameters*.  Seven lakes had less median total phosphorus, median
        dissolved phosphorus, and median inorganic nitrogen; five lakes had
        less mean chlorophyll a_; and five had greater mean Secchi disc
        transparency.  Marked depression or depletion of dissolved oxygen
        with depth occurred at all sampling stations during the summer  and
        fall sampling.
            Extensive nuisance algae conditions have been noted in the  past
        in this reservoir (Ketelle and Uttormark, 1971); however, Survey
        limnologists did not observe nuisance algae during the sampling
        year.
    B.  Rate-Limiting Nutrient:
            The algal assay results are not considered indicative of con-
        ditions in the.reservoir due to nutrient losses in the sample during
        shipment from the field to the laboratory.  The reservoir data  indi-
        cate phosphorus limitation at all sampling stations in April  and
        nitrogen limitation at two of the three stations in July and Sep-
        tember (see page 8).
* See Appendix A.

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                                 2
C.   Nutrient Controllability:
        1.  Point sources—During the sampling year,  phosphorus  con-
    tributions from known point sources accounted for 25.3% of the
    total load to Occoquan Reservoir.  Most of, this load (22.3%) was
    contributed by the eleven wastewater treatment plants  impacting
    Bull  Run or streams tributary to it.  The remaining 3.0% came
    from the six wastewater treatment plants discharging to tribu-
    taries of the Occoquan River.
        The present loading of 13.62 g/m2/yr is nine  times that  pro-
    posed by Vollenweider (Vollenweider and Dillon, 1974)  as eutrophic
    loading (see page 14).  However, Vollenweider's model  probably
    does  not apply to water bodies with short hydraulic retention times,
    and the mean hydraulic retention time of Occoquan Reservoir  is only
    27 days.  Nonetheless, the existing trophic condition  of the reser-
    voir is evidence of excessive nutrient loads.
        Although primary production apparently is limited  by nitrogen
    during part of the year, if phosphorus loads were sufficiently
    reduced, a persistent phosphorus limitation probably could be
    attained (see page 8), and the present rate of eutrophication
    of the reservoir could be slowed.  If phosphorus  discharges  from
    the 17 major contributors were completely removed or diverted,
    the loading would be lowered to 10.18 g/m2/year,  and the total
    phosphorus input to Occoquan Reservoir would be reduced to about
    75% of the present loading.

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                             3
    Phosphorus removal or diversion has been recommended in a
report on previous studies of the reservoir (Sawyer, 1970).
Survey findings support this recommendation.
    A recent publication indicates that the Upper Occoquan Sewage
Authority is building a regional facility that will eliminate
eleven of the secondary treatment plants (Suhr and Kepple, 1975).
The plant will include advanced treatment for nutrient removal.
As attainment of the phosphorus effluent standard of 0.1 mg/1
established by the Virginia State Water Control Board is achieved,
gradual water quality improvement should result.
    2.  Non-point sources—The phosphorus contribution of non-
point sources accounted for 74.7% of the total load to the reser-
voir during the sampling year.  Bull Run contributed 63.5%, the
Occoquan River contributed 9.7%, and the two remaining gaged
tributaries contributed 0.2% of the total input.  Ungaged tribu-
taries were estimated to have contributed 1.2% of the total.
    Bull Run had a very high phosphorus export rate (124 kg/km2/yr)
as compared to the other gaged tributaries; e.g., the Occoquan
River (10 kg/km2/yr), Hooes Run (11 kg/km2/yr), and Wolf Creek
(6 kg/km2/yr).  This may have been due to unknown point sources
impacting Bull Run and its tributaries, underestimation of loads
from known point sources, or "natural drainage from forested, agri-
cultural and urban lands" (Sawyer, op. cit.).

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II.   LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
     A.   Lake Morphometry  :
         1.   Surface area:   6.88 kilometers2.
         2.   Mean depth:  4.9 meters.
         3.   Maximum depth:   Unknown.
         4.   Volume:  33.712 x 106  m3.
         5.   Mean hydraulic  retention  time:  27  days.
     B.   Tributary and Outlet:
         (See Appendix C for flow data)
         1.   Tributaries -
                                               Drainage       Mean flow
             Name                              area  (km2)*    (m3/sec)*
             Occoquan River                        888.4          8.4
             Hooes Run                              11.0          0.1
             Bull Run                             479.1          4.6
             Wolf Run                               15.6          0.1
             Minor tributaries &
              immediate drainage -                 132.3          1.3
                            Totals                1,526.4         14.5
         2.   Outlet -
             Occoquan River                       1,533.3**       14.5
     C.   Precipitation***:
         1.   Year of sampling:  85.6 centimeters.
         2.   Mean annual:  101.5 centimeters.
 t Table of metric conversions—Appendix B.
 ft Bellanca, 1975.
 * For limits of accuracy, see Working Paper No.  175,  "...Survey Methods,
   1973-1976".
 ** Includes area of lake.
 *** See Working Paper No. 175.

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                                       5
III.   LAKE WATER QUALITY SUMMARY
      Occoquan Reservoir was sampled three times  during the open-water
  season of 1973 by means of a pontoon-equipped Huey helicopter.   Each
  time,  samples for physical and chemical  parameters were collected from
  three  stations on the reservoir and from a number of depths  at  each
  station (see map, page v).  During each  visit,  a  single depth-integrated
  (4.6 m to surface) sample was composited from the stations for  phytoplank-
  ton identification and enumeration; and  during  the first visit, a single
  18.9-liter depth-integrated sample was composited for algal  assays.
  In  July and September, a depth-integrated sample  was collected  from
  each of the stations for chlorophyll  a^ analysis.   The maximum depths
  sampled were 17.1 meters at station 1, 7.6 meters at station 2, and
  7.9 meters at station 3.
      The sampling results are presented in full  in Appendix D and are
  summarized in the following table.

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                             A. SUMMARY OF PHYSICAL  AND
CHEMICAL CHARACTERISTICS FOR OCCOOUAN RESERVOIR
 STORET CODE 5108
PARAMETER

TEMP (C)

OISS OXY (MG/L)

CNDCTVY (MCROMO)

PH (STAND UNITS)

TOT ALK (MG/L)

TOT P (MG/L)

ORTHO P (MG/L)

N02»N03 (MG/L)

AMMONIA (MG/L)

KJEL N  (MG/L)

INORG N (MG/L)

TOTAL N (MG/L)

CHLRPYL A (UG/L)

SECCHI  (METERS)
1ST SAMPLING ( 4/10/73)
3 SITES
RANGE
11.3
6.3
92.
7.2
19.
0.080
0.019
0.360
0.100
0.500
0.460
0.970
0.3
- 12.4
- 10.6
- 110.
8.7
25.
- 0.105
- 0.045
- 0.470
- 0.160
- 1.000
- 0.600
- 1.400
0.3
MEAN
11.9
9.2
100.
8.5
21.
0.096
0.035
0.412
0.131
0.707
0.543
1.119
0.3
MEDIAN
12.0
9.2
100.
8.6
20.
0.100
0.040
0.410
0.130
0.700
0.550
1.100
0.3
2ND SAMPLING ( 7/19/73)
3 SITES
RANGE
16.0
0.0
96.
7.1
31.
0.040
0.016
0.060
0.100
0.700
0.160
0.770
3.4
0.8
- 28.7
9.4
- 172.
7.6
- 61.
- 0.678
- 0.306
- 0.320
- 1.640
- 2.800
- 1.820
- 2.980
- 15.7
1.8
MEAN
23.3
2.4
124.
7.4
38.
0.169
0.067
0.159
0.494
1.200
0.653
1.359
11.5
1.4
MEDIAN
22.6
0.4
122.
7.3
34.
0.099
0.038
0.130
0.310
1.000
0.580
1.310
15.5
1.5
3RD SAMPLING ( 9/29/73)
3 SITES
RANGE
21.3
1.0
40.
6,. 6
31.
0.069
0.019
0.060
0.060
0.500
0.130
0.670
9.9
0.8
- 24.2
5.8
- 190.
8.2
41.
- 0.192
- 0.066
- 0.760
- 0.400
- 1.200
- 1.160
- 1.860
~ 17.9
1.8
MEAN
22.7
3.2
99.
7.2
35.
0.096
0.033
0.201
0.239
0.883
0.440
1.084
13.3
1.2
MEDIAN
22.7
3.3
118.
7.1
36.
0.077
0.035
0.160
0.270
0.900
0.435
1.075
12.1
0.9

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B.  Biological characteristics:

    1.   Phytoplankton -
        Sampling
        Date

        04/10/73
        07/19/73
        09/29/73
    2.   Chlorophyll  a^ -

        Sampling
        Date

        07/19/73
        09/29/73
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Asterionella sp.
Flagellates
Melosira SJD.
Synedra sp.
(tyros igma sp.
Other genera
Total
Coelastrum sp_.
Scenedesmus sj>.
Flagellates
Fragellaria sp.
Kirchneriella sp.
Other genera
Total
Melosira sp_.
Flagellates
Phacus sp.
Coelastrum sp.
Stephanodiscus sj>
Other genera
                           Algal Units
                           per ml	

                             1,529
                               257
                               122
                                41
                                14
                             	21

                             1,984
                                          Total
Station
Number

  01
  02
  03

  01
  02
  03
                             3,706

                             3,504
                               782
                               116
                                87
                                58
                               202

                             4,749
Chlorophyll a
(ug/1)

    15.7
    15.5
     3.4

     9.9
    17.9
    12.1

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                                 8
C.  Limiting Nutrient Study:
        The algal assay results are not considered  indicative of
    conditions in the reservoir because of significant  nutrient
    losses in the sample during shipment from the field to  the
    laboratory.
        The reservoir data indicate a combination of limiting
    nutrients.  Following is  a tabulation of the mean inorganic
    nitrogen/orthophosphorus  ratios for each of the sampling stations
    and times with the indicated limiting nutrient  in parentheses.
    Station            04/10/73           07/19/73           09/29/73
       01
       02
       03
14/1 P)
14/1 P)
24/1 P)
14/1 (P
11/1 (N
8/1 (N
13/1 (N?)
12/1 (N)
15/1 (P)

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IV.   NUTRIENT LOADINGS
     (See Appendix E for data)
     For the determination of nutrient loadings,  the  Virginia  National
 Guard collected monthly near-surface grab samples  from each of the
 tributary sites indicated on the map (page v), except for the high
 runoff months of March, May, and June when two samples were collected.
 Sampling was begun in July,  1973, and was completed  in June,  1974.
     Through an interagency agreement, stream flow  estimates for the
 year of sampling and a "normalized" or average year  were provided by
 the Virginia District Office of the U.S.  Geological  Survey for the
 tributary sites nearest the  lake.
     In this report, nutrient loads for sampled tributaries were
 determined by using a modification of a U.S.  Geological  Survey computer
 program for calculating stream loadings*.  Nutrient  loads shown are
 those measured minus point-source loads,  if any.
     Nutrient loads for unsampled "minor tributaries  and immediate
 drainage" ("II" of U.S.G.S.) were estimated using  the means of the
 nutrient loads, in kg/km2/year, at stations B-l  and  D-l  and multiplying
 the means by the II area in  km2.
     The operators of the Linton Hall School;  Camp  Upshur, Marine Corps;
 Fairfax County Flatlick, Rocky Run, Greenbriar,  Middle Cub Run, and
 Upper Cub Run; U.S. Army Vint Hill #1 and # 2; Town  of Manassas North-
 side and Liberia; Town of Manassas Park North and  South; Greater Manassas
 * See Working Paper No.  175.

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                                    10
Old Centerville and Loch Lomond wastewater treatment plants provided
monthly effluent samples and corresponding flow data.
    The operator of the wastewater treatment plant at Gainesville did
not participate in the Survey, and nutrient loads were estimated at
                              /
1.134 kg P and 3.401 kg N/capita/year.  The operator of the Nokesville
High School wastewater treatment plant also did not participate.  How-
ever, no information was available on the population served, and the
nutrient loads could not be estimated but probably were of minor sig-
nificance.
    It is noted that the Camp Upshur plant was closed from 12/73 through
5/74 for installation of phosphorus removal equipment, and phosphorus
removal is to be provided at the U.S. Army plants and the two Manassas
Park plants in the near future.

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                                    11
    A.  Waste Sources:

        1.  Known municipal
t

Name
Linton Hall
School
Nokesville
High School
Camp Upshur,
Marine Corps.
Fairfax County -
Flatlick

Big Rocky Run
Greenbriar

Middle Cub
Run
Upper Cub Run
U.S. Army -
Vint Hill #1
Vint Hill #2
Town of Manassas
Northside

Liberia

Town of Manassas
Park #1 ,
#2 >
Greater Manassas
SD
Centerville
}
Loch Lomond

Gainesville/
Pop.
Served
165

?

213


2,900

2,200
7,500

4,900

1,500
++
656TT
704tf
-
6,600

-


1 9 nnn
1 £ , \J\J\J



25,340*


150
Mean Flow
Treatment
prim.
clarifier
prim.
clarifier
act. sludge


act. sludge
+ P removal
act. sludge
act. sludge
+ P removal
act. sludge
+ P removal
act. sludge

tr. filter
tr. filter

tr. filter &
P removal
act. sludge
+ P removal

act. sludge
act. sludge


act. sludge
+ P removal
act. sludge
+ P removal
ext. aer.
(m3/d)
14.6

?

485.2


1,253.6

725.1
2,544.1

2,134.7

663.6

248.6
266.3

2,342.0

768.7


893.0
584.8


6,255.4

3,335.9

56.8**
Receiving
Water
Trib. to
Broad Run
Trib. to
Kettle Run
Cedar Run


Flatlick Run

Big Rocky Run
Big Rocky Run

Cub Run

Cub Run

South Run
South Run

Flat Branch

Flat Branch


Bull Run
Bull Run


Bull Run

Bull Run

North Fork of
         Util./Lakeview
         Estates***

        2.  Known industrial - None
                                   Broad Run
t Gregory, 1973; Bingham, 1973; Gozikowski, 1973.
tt Actual population served is classified information; pop. shown is esti-
   mate based on flow of 0.3785 m3/capita/day.
* Population estimate based on flow of 0.3785 m3/capita/day.
** Flow estimated at 0.3785 m3/capita/day.
*** Anonymous, 1971.

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                                    12

    B.  Annual Total Phosphorus Loading - Average Year:

        1.  Inputs -

                                              kg P/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -

                Occoquan River                 9,065           9.7
                Hooes Run                        125           0.1
                Bull Run                      59,515          63.5
                Wolf Run                          90           0.1

            b.  Minor tributaries & immediate
                 drainage (non-point load) -   1,125           1.2

            c.  Known municipal STP's -

                Linton Hall School                95           0.1
                Nokesville High School            ?
                Camp Upshur, Marine Corps        695           0.7
                Fairfax County -
                 Flatlick                        925           1.0
                 Big Rocky Run                 1,050           1.1
                 Greenbriar                    3,885           4.1
                 Middle Cub Run                2,120           2.3
                 Upper Cub Run                   725           0.8
                U.S. Army -
                 Vint Hill  #1                     810           0.9
                 Vint Hill  #2                  1,020           1.1
                Town of Manassas -
                 Northside                     1,130           1.2
                 Liberia                         600           0.6
                Town of Manassas Park
                 #1                            3,280           3.5
                 #2                            1,780           1.9
                Greater Manassas SD -
                 Centerville                   2,590           2.8
                 Loch Lomond                   2,790           3.0
                Gai nesvi11e/Uti1./Lakevi ew
                 Estates                         170           0.2

            d.  Septic tanks* -                    5          <0.1

            e.  Known industrial - None

            f.  Direct precipitation** -          120           0.1

                        Total                  93,710         100.0

        2.  Outputs -

            Lake outlet - Occoquan River      36,005

        3.  Net annual P accumulation - 57,705 kg.
* Estimate based on 18 lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.

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                                    13

        Annual Total Nitrogen Loading - Average Year:

        1.  Inputs -

                                              kg N/          % of
            Source                            yr             total
            a.  Tributaries (non-point load) -

                Occoquan River                342,180         45.4
                Hooes Run                       2,960          0.4
                Bull Run                      255,480         33.9
                Wolf Run                        3,995          0.5

            b.  Minor tributaries & immediate
                 drainage (non-point load) -   34,730          4.6

            c.  Known municipal STP's -

                Linton Hall School                230         <0.1
                Nokesville High School            ?
                Camp Upshur, Marine Corps       2,235          0.3
                Fairfax County -
                 Flatlick                       4,830          0.6
                 Big Rocky Run                  3,860          0.5
                 Greenbriar                    14,700          1.9
                 Middle Cub Run                 9,380          1.2
                 Upper Cub Run                  2,595          0.4
                U.S. Army -
                 Vint Hill #1                    1,970          0.3
                 Vint Hill #2                   1,265          0.2
                Town of Manassas -
                 Northside                     13,315          1.8
                 Liberia                        4,420          0.6
                Town of Manassas Park
                 #1                             6,465          0.9
                 #2                             3,260          0.4
                Greater Manassas SD -
                 Centerville                   24,355          3.2
                 Loch Lomond                   13,600          1.8
                Gainesville/Util./Lakeview
                 Estates                          510          0.1

            d.  Septic tanks* -                   190         <0.1

            e.  Known industrial - None

            f.  Direct precipitation** -        7,430          1.0

                        Total                  753,955        100.0

        2.  Outputs -

            Lake outlet - Occoquan River      696,985

        3.  Net annual N accumulation - 56,970 kg.
* Estimate based on 18 lakeshore dwellings; see Working Paper No. 175.
** See Working Paper No. 175.

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                                14
D.  Mean Annual Non-point Nutrient Export by Subdrainage Area:
    Tributary                             kg P/km2/yr    kg N/km2/yr
    Occoquan River                             10            385
    Hooes Run                                  11            269
    Bull Run                                  124            533
    Wolf Run                                    6            256
E.  Yearly Loads:
        In the following table, the existing phosphorus  loadings
    are compared to those proposed by Vollenweider (Vollenweider
    and Dillon, 1974).  Essentially, his "dangerous"  loading is
    one at which the receiving water would become eutrophic or
    remain eutrophic; his "permissible" loading is that  which
    would result in the receiving water remaining oligotrophic
    or becoming oligotrophic if morphometry permitted.   A meso-
    trophic loading would be considered one between "dangerous"
    and "permissible".
        Note that Vollenweider's model  may not be applicable to
    water bodies with short hydraulic retention times.
                              Total  Phosphorus       Total  Nitrogen
    	Total    Accumulated    Total    Accumulated
    grams/m2/yr             13.62      8.39        109.6     8.3

    Vollenweider phosphorus loadings
     (g/m2/yr) based on mean depth and mean
     hydraulic retention time of Occoquan Reservoir:
        "Dangerous"  (eutrophic loading)                1.52
        "Permissible"  (oligotrophic loading)            0.76

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                                15

LITERATURE REVIEWED

Anonymous, 1971.  Inventory of municipal  waste facilities, EPA Publ.
    OWP-1, vol. 3, Wash., DC.

Bellanca, M. A., 1975.  Personal communication (lake morphometry).
    VA Water Contr. Bd.,  Richmond.    i

Bingham, Roy L., 1973.  Treatment plant questionnaire (Camp Upshur
    STP).  Quantico.

Gozikowski, R. J., 1973.   Treatment plant questionnaires (Fairfax
    County STP's).  Fairfax.

Gregory, Jean, 1973.  Treatment plant questionnaires.  VA Water
    Contr. Bd., Richmond.

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

Sawyer, Clair N., 1971.  Occoquan Reservoir study.   Metcalf & Eddy
    Engineers, Boston.

Suhr, L. Gene, and Larry Kepple, 1975.  AWT plant gets tough with
    ammonia.  Water &, Wastes Engr.  12:   26-30.

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

-------
VI.  APPENDICES
                                   APPENDIX  A
                                  LAKE  RANKINGS

-------
LAKt DATA TO 3E USED IN KANt\INGS
LAKE
CODE  LAKE NAME
5103  CLAVTOP LAKE
5105  JOHN w. FLANNAGAN DAM
5106  JOHN H. KESK RESERVOIR
5106  OCCOOUAN PESEKVOIW
5110  SMITH MOUNTAIN LAKE
5111  LAKE CHESOIN
5112  CHICKAHOMINY LAKE
5113  RIVANNA (SOUTH FOPK) RES
MEDIAN
TOTAL P
0.031
0.011
0.04*
0.099
0.016
0.0*4
0.066
0.079
MELlIAN
0.45C
0.320
0.290
0.525
0.410
0.240
0.125
0.475
500-
MEAN SEC
43^.500
415.700
458.937
459.750
419.667
465.778
455.333
460.222
ME AIM
5. 6*2
5.955
3. 633
12.417
11.593
12.556
13.600
b.667
15-
M I N UU
14.900
14. BOO
15.000
15.000
15.000
14. BOO
9.400
13.000
Mt'OIAN
0 1 SS OK! oO
0.008
0.004
0.009
0.037
0.005
0.008
0.017
0.022

-------
PERCENT OK LAKES WITH HIGHER VALUES  (NUMtJE^  OF  LAr«,ES  WITH HIGHER VALUES)
LA«£
COOi  LAKE NAME
5103  CLAYTOR LAKE
5105  JOHN w. FLANNAGAN OA-I
5106  JOHN H. KE^R WESEHVOIR
5108  OCCOQUAN RESEHVOIW
511C  SMITH MOUNTAIN LArE
5111  LAKE CHESDIN
5112  CHICKAHOMINY LAKE
                   a
5113  RIVANNA (SOUTH FORK) RES
MEDIAN
TOTAL P
71 (
100 (
43 <
0 (
86 (
57 (
29 (
14 (
5)
7)
3)
C)
6)
4)
2>
1)
MEDIAN
INOSG
29 (
57 (
71 (
0 (
43 (
86 (
100 (
14 (
N
2)
4)
5)
0)
3)
6)
7)
1)
500-
MEAN SEC
71 (
100 (
43 (
29 (
86 (
0 C
57 (
14 (
5)
7)
3)
2)
6)
0)
4)
1)
MEAN
CHLClKA
100 (
86 (
57 (
29 (
43 (
14 (
0 (
71 (
7)
6)
4>
2)
3)
1)
0)
5)
15- MtOIAN
MIiN 00 D1SS UKTHO P
43 (
64 (
14 <
l
0)
\
0)
4)
7)
6)
t>4 (
100 (
43 (
0 (
H6 (
64 (
29 (
14 (
4)
7)
3)
C)
6)
4)
2)
1)
INOEX
NO
378
507
271
72
358
2
-------
LAKES *ANi\EO riY IMJL'A NOb.




3ANK  LAKE CODE  LAi\E NAME                IN'OEX  NO






   1  51 Ob       JOHN W. FLANNAOAN  DAM       507




   ?  5103       CLAYTOH LAKE                378




   3  5110       SMITrt MOUNTAIN  LAKE         358




   4  5112       CrtlCKAHOMINY LAKE           315




   5  5111       LAKE CHESOIN                ?85




   6  5106       JOHN H. KEfM RESERVOIR      271




   7  5113       RIVANNA (SUUTH  FORK) RES    213




   8  5108       OCCOOUAN RESERVOIR          72

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

-------
                CONVERSION FACTORS

Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10"4 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile

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

-------
                                   TRIBUTARY FLOW INFORMATION FOR VIRGINIA
                                                                                          02/05/76
LAKE CODE 5108
                   OCCOtUAN RESERVOIR
     TOTAL DRAINAGE AREA OF LAKE(SO KM)   1533.3
          SUB-DRAINAGE
TRIBUTARY  AREA(SO KM)    JAN
                                  FEB
MAR
APR
MAY
NORMALIZED FLOWS(CMS)
  JUN     JUL     AUG     SEP
OCT
NOV
DEC
MEAN
5108A1
510BA2
5108B1
5108C1
510801
5108ZZ
1533.3
888.4
11.0
479.1
15.6
139.9
19.54
11.33
0.14
6.23
0.20
1.76
24.35
14.16
0.17
7.65
0.25
2.24
29.45
16.99
0.20
9.34
0.28
2.69
22.65
13.31
0.14
7.08
0.20
1.98
15.86
9.06
0.11
5.10
0.17
1.47
10.19
5.95
0.06
3.11
0.08
0.79
7.08
4.25
0.03
2.21
0.06
0.57
9.63
5.66
0.06
3.11
0.08
0.85
5.66
3.40
0.02
1.70
0.03
0.40
5.66
3.40
0.03
1.73
0.03
0.42
9.91
5.66
0.06
3.11
0.08
0.91
14.72
8.50
O.OB
4.53
0.14
1.30
14.51
0.44
0.09
4.56
0.13
1.28
5108A2
7
8
9
10
11
12
1
3
4
5
6
7
8
9
10
11
12
1
3
4
5
6
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
5.10
12.77
8.10
3.96
2.15
50.40
52.39
19.40
25.49
15.29
18.41
1.76
8.98
2.68
2.21
4.53
5.66
24.24
9.71
12.29
8.01
8.78
15
12
8
14
11
8
20
3
21
19
8
15
12
8
14
11
8
20
3
21
19
8
                                                                   SUMMARY
                                                         1533.3
                                                         1534.0
                        TOTAL DRAINAGE AREA OF LAKE
                        SUM OF SUB-DRAINAGE AREAS

     MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)

TRIBUTARY   MONTH   YEAR    MEAN FLOW  DAY         FLOW  DAY

5108A1
                                    TOTAL FLOW IN
                                    TOTAL FLOW OUT
                                                174.65
                                                174.71
                                                                     FLOW  DAY
                                             FLOW
2.38
3.31
3.34
2.41
2.12
1.98
26.90
1.90
2.38
2.18
2.24
0.31
0.24
1.50
1.10
2.10
2.83
7.67
5.10
4.25
4.05
3.34







10

31
21







10

31
21
                                                                     2.07

                                                                     2.27
                                                                     2.69
                                                                     3.91

                                                                     1.95
                                                                     2.24

-------
LAKE CODE 5108
                       TRIBUTARY FLOW INFORMATION FOR VIRGINIA

       OCCOQUAN RESERVOIR
                                                                                          02/05/76
     MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY

5108B1
5108C1
5108D1
MONTH   YEAR
7
8
9
10
11
12
1
3
4
5
6
7
8
9
10
11
12
1
3
4
5
6
7
8
9
10
11
12
1
3
4
5
6
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
73
73
73
73
73
73
74
74
74
74
74
MEAN FLOW  DAY
0.02
0.10
0.02
0.03
0.06
0.25
0.21
0.17
0.04
0.12
0.11
1.80
2.66
2.69
2.83
11.33
12.74
11.41
5.13
7.48
4.30
5.10
0.03
0.14
0.03
0.04
0.08
0.36
0.31
0.24
0.05
0.18
0.16
15
12
8
14
11
8
20
3
21
19
8
15
12
8
14
11
8
20
3
21
19
8
15
12
8
14
11
8
20
3
21
19
8
FLOW  DAY
0.01
0.01
0.01
0.00
0.02
0.03
0.06
0.07
0.05
0.03
0.03
0.74
0.37
0.76
0.88
1.39
1.47
2.78
2.83
2.55
2.18
2.32
0.04
0.02
0.03
0.03
0.04
0.06
0.10
0.11
0.09
0.07
0.07







10

31
21







10

31
21







10

31
21
FLOW  DAY
                                                                     0.05

                                                                     0.04
                                                                     0.01
                                                                     2.15

                                                                     1.64
                                                                     1.59
                                                                     0.09

                                                                     0.07
                                                                     0.04
FLOW

-------
        APPENDIX D
PHYSICAL and CHEMICAL DATA

-------
STORET RETRIEVAL DATE 76/02/05
                                                                  510801
                                                                 38 41 46.0 077 16 49.0
                                                                 OCCOQUAN RESERVOIR
                                                                 51059   VIRGINIA



DATE TIME DEPTH
FROM OF
TO DA* FEET
73/04/10 10 15 0000
10 15 0006
10 15 0015
10 15 0025
10 15 0035
10 15 0046
10 15 0056
73/07/19 14 40 0000
14 40 0004
14 40 0015
14 40 0025
14 40 0055
73/09/29 12 15 0000
12 15 0005
12 15 0015
12 15 0025
12 IS 0040
DATE TIME DEPTH
FROM OF
TO DAY FEET
73/04/10 10 IS 0000
10 15 0006
10 IS 0015
10 IS 0025
10 15 0035
10 15 0046
10 IS 0056
73/07/19 14 40 0000
14 40 0004
14 40 0015
14 40 0025
14 40 OOSS
73/09/29 12 15 0000
12 IS 0005
12 15 0015
12 15 0025
12 IS 0040


00010
WATER
TEMP
CENT
12.4
12.4
12.4
12.3
12.3
12.2
12.1
28.3
26.8
22.2
19.1
17.0
23.6
22.9
22.8
22*6
22.2
00665
PHOS-TOT

MG/L P
0.101
0.099
0.104
0.097
0.100
0.100
0.105
0.048
0.058
0.079
0.202
0.099
0.146
0.070
0.076
0.075
0.086


00300
DO

MG/L

8.6
8.6
8.6
8.6
6.3
8.2

5.4
3.4
0.6
0.0

4.0
3.0
1.2
1.0
32217
CHLRPHYL
A
UG/L







15.7




9.9






00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
12 110
100
95
95
92
92
92
60 119
114
102
96
99
36 40
53
62
60
56




















11EPALES
3
2111202


0060 FEET DEPTH
00400 00410 00610 00625
PH T ALK
CAC03
SU MG/L
7.20
8.SO
8.70
8.70
8.60
8.60
8.60
7.50
7.30
7.40
7.10
7.30
8.00
7.00
6.70
6.60
6.70




















NH3-N TOT KJEL
TOTAL N
MG/L MG/L
20 .150 .000
20 .160 .700
20 .140 .700
19 .140 .MO
19 .130 .6*0
20 .150 . .700
21 .160 .800
32 .110 .700
31 .100 .900
32 .250 .800
38 .720 .400
32 .370 .900
31 .060 .200
33 .260 .MO
34 .280 .500
33 .300 .MO
36 .3*0 .MO




















00630 00671
N021N03 PHOS-DIS
N-TOTAL ORTHO
MG/L MG/L P
0.400 0.045
0.430 0.040
0.410
0.410
0.400
0.400
0.420
.070
.064
.120
.'110
.210
.130
.200
.170
.210
.180




















.036
.044
.032
.042
.039
.017
.01*
.021
.059
.OM
.024
.035
.035
.039
.03*





















-------
STORE! RETRIEVAL DATE 76/02/05
                                                                  510802
                                                                 38 43 10.0 077 20 1
                                                                 OCCOQUAN RESERVOIR
                                                                 51059   VIRGINIA

DATE
FROM
TO
73/04/10



73/07/19



73/09/29




DATE
FROM
TO
73/04/10



73/07/19



73/09/29




TIME DEPTH
OF
DAY FEET
10 50 0000
10 50 0006
10 50 0015
10 50 0021
14 10 0000
14 10 0005
14 10 0015
14 10 0025
12 30 0000
12 30 0005
12 30 0015
12 30 0025

TIHE DEPTH
OF
DAY FEET
10 50 0000
10 50 0006
10 50 0015
10 50 0021
14 10 0000
14 10 0005
14 10 0015
14 10 0025
12 30 0000
12 30 0005
12 30 0015
12 30 0025
00010
MATER
TEHP
CENT
12.0

11.9
11.9
28.7
27.6
22.6
19.5
23.6
23.1
22.5
22.1
00665
PHOS-TOT

HG/L P
0.105
0.099
0.101
0.100
0.040
0.060
0.167
0.343
0.069
0.075
0.112
0.095
00300
DO

HG/L

9.8
10.0
10.0

9.4
0.2
0.0

5.8
3.6
2.8
32217
CHLRPHYL
A
UG/L




15.5



17.9



                                          00077     00094
                                         TRANSP   CNDUCTVY
                                         SECCHI   FIELD
                                         INCHES   HICROHHO

                                                       110
                                                       110
                                                       107
                                                       105
                                              72       136
                                                       129
                                                       131
                                                       122
                                              70       124
                                                       122
                                                       120
                                                       120
11 EP ALES
3
00400
PH

SU
8.60
8.60
8.60
8.50
7.60
7.40
7.20
7.30
7.20
7.70
7.00
7.20

00410
T ALK
CAC03
HG/L
23
25
23
24
34
33
38
41
35
35
36
36
2111202
0025
00610
NH3-N"
TOTAL
MG/L
0.120
0.100
0.130
0.110
0.120
0.100
0.590
1.000
0.160
0.170
0.300
0.330
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.800
0.600
0.500
0.600
0.8*0
0.700
1.100
1.700
1.000
0.800
1.100
1.100
00630
N021N03
N-TOTAL
HG/L
0.450
0.450
0.470
0.450
0.150
0.110
0.320
0.100
0.090
0.090
0.110
0.150
00671
PHOS-DIS
ORTHO
HG/L P
0.040
0.040
0.042\
0.044
0.021
0.024
0.075
0.109
0.021
0.025
0.038
0.035

-------
STORE! RETRIEVAL DATE 76/02/05
                                                                  510803
                                                                 38 43 23.0 077 22 53.0
                                                                 OCCOQUAN RESERVOIR
                                                                 51153   VIRGINIA

DATE
FROM
TO
73/04/10



73/07/19



73/09/29



DATE
FROM
TO
73/04/10



73/07/19



73/09/29



TIME DEPTH
'OF
DAY FEET
13 10 0000
13 10 0006
13 10 0016
13 10 0026
13 40 0000
13 40 0005
13 40 0015
13 40 0025
12 50 0000
12 50 0005
12 50 0015

TIME DEPTH
OF
DAY FEET
13 10 0000
13 10 0006
13 10 0016
13 10 0026
13 40 0000
13 40 0005
13 40 0015
13 40 0025
12 50 0000
12 50 0005
12 50 0015
00010
HATER
TEMP
CENT
11.3
11.3
11.3
11.3
28.7
26.4
20.5
16.0
24.2
21.8
21.3
00665
PHOS-TOT

MG/L P
0.081
0.082
0.080
0.081
0.074
0.166
0.185
0.678
0.079
0.075
0.192
00300
00

MG/L

10.5
10.4
10.6

5.2
0.0
0.0
4.3
4.2
2.6
32217
CHLRPHYL
A
UG/L




3.4



12.1


                                          00077     00094
                                         TRANSP   CNOUCTVY
                                         SECCHI   FIELD
                                         INCHES   MICROMHO
                                              12
                                              30
                                              30
100
100
100
 98
137
172
119
130
115
123
190
11EPALES
3
00400
PH

SU
8.70
8.60
8.70
8.60
7.50
7.30
7.50
7.20
8.20
7.30
6.90

00410
T ALK
CAC03
MG/L
20
19
20
20
34
42
43
61
36
36
41
2111202
0030
00610
NH3-N
TOTAL
MG/L
0.120
0.100
0.130
0.120
0.110
0.310
1.000
1.640
0.070
0.160
0.400
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.800
0.700
0.700
0.600
1.300
1.000
1.500
2.800
1.100
0.800
1.100
00630
N021N03
N-TOTAL
MG/L
0.360
0.360
0.390
0.380
0.130
0.310
0.200
0.180
0.060
0.260
0.760
00671
PHOS-OIS
ORTHO
MG/L P
0.020
0.020
0.019
0.022
0.016
0.075
0.087
0.306
0.019
0.026
0.066

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

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  510HA1
                                                                 38 41  40.0  077 Ib 35.0
                                                                 OCCOUUAN RIVER
                                                                 51117    7.5 OCCOQUAN
                                                                 0/OCCOQUAN  RES
                                                                 1 MI DOWNSTREAM OF OCCOQUAN DAM
                                                                 11EPALES             2111204
                                                                 4                   0000  FEET  DEPTH
DATE
FROM
TO
73/08/12
73/09/08
73/10/14
73/11/11
73/12/08
74/01/20
74/03/03
74/03/10
74/04/21
74/05/19
74/05/31
74/06/OH
74/06/21
00630 00625
TIME DEPTH >M02(*N03 TOT KJEL
OF iM-TOTAL N
DAY FEET
12
14
13
12
14
12
12
13
13
13
12
13
12
40
00
00
45
00
30
10
15
00
00
30
00
30
MG/L
0
0
0
0
0
0
0
0
0
1
0
0
0
.056
.210
.520
.430
.490
.850
.520
.528
.384
.260
.700
.310
.352
MG/L
0.
1.
0.
0.
0.
0.
0.
1.
2.
1.
0.
1.
0.
560
150
900
450
800
300
500
400
700
300
800
500
600
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
M(j/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
189
220
088
072
060
040
020
085
070
250
125
160
080
MG/L
0.
0.
0.
0.
0.
C.
0.
0.
0.
0.
0.
0.
0.
P
029
028
0^0
015
016
040
010
015
020
025
010
020
020
MG/L P
0.085
0.090
0.060
0.035
0.035
0.065
0.050
0.051
0.180
0.110
0.185
0.035
0.045

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  S108A2
                                                                 38 42 20.0 077 26 47.0
                                                                 OCCOUUAN RIVER
                                                                 51      7.5 INDEPENDENT
                                                                 I/OCCOQUAN RES
                                                                 RT 234 BRDG JUST BELO LK JACKSON DAM
                                                                 11EPALES             2111204
                                                                 4                   0000 FEET  DEPTH
DATE
FROM
TO
73/07/15
73/08/12
73/09/08
73/10/14
73/11/11
73/12/08
74/01/20
74/03/03
74/03/10
74/04/21
74/05/19
74/05/31
74/06/08
74/06/21
00630 00625
TIME OEPTn N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
09
10
12
10
10
10
10
10
10
10
10
10
10
10
45
15
45
00
10
45
15
20
15
15
30
15
30
15
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
1
0
.200
.042
.024
.16U
.190
.028
.756
.108
.OU8
.088
.288
.560
.100
.520
MG/L
0.
2.
0.
0.
0.
0.
0.
0.
1.
0.
3.
0.
1.
0.
710
500
160
650
800
400
100K
800
000
600
700
400
000
700
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
G.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
069
132
067
046
085
016
040
045
050
040
135
042
270
270
MG/L
0.
0.
0.
0.
0.
0.
6.
0.
0.
0.
0.
0.
0.
0.
p
012
014
009
019
015
012
015
005K
005
005
010
005K
010
020
MG/L P
0.055
0.050
0.055
0.065
0.060
0.060
0.035
0.025
0.025
0.040
0.045
0.050
0.045
0.030
              K VALUE KNOWN TO BE
              LESS THAN INDICATED

-------
STORET KETRIEV/AL DATE 75/03/^6
                                                                  510881
                                                                 SB 40 50.0 077 17 14.0
                                                                 HOOES RUN
                                                                 51      7.5 OCCOQUAN
                                                                 T/OCCOQUAN RES
                                                                 RD riRUG .5 MI N OF AGNEWVILLE
                                                                 11EPALES             2111204
                                                                 4                   0000 FEET  DEPTH
DATE
FROM
TO
73/07/15
73/08/12
73/04/08
73/10/14
73/11/11
73/12/OH
74/01/2U
74/03/03
74/03/10
74/04/21
74/05/19
74/05/31
74/06/08
74/06/21
00630 00625
TIME DEPTH ,M02t*N03 TOT KJEL
OF •••J-TOTAL N
UAY FEET
12
12
10
12
12
13
12
12
12
12
13
12
12
12
34
15
40
20
30
30
00
40
45
45
15
00
30
00
MG/L
0
0
0
G
0
0
0
0

0
0
0
u
0
.250
.042
.025
.030
.150
.240
.39u
.080

.060
.160
.Odd
.096
.16B
MG/L
1.
1.
0.
0.
0.
1.
0.
1.
1.
0.
1.
0.
0.
0.
470
100
170
750
450
175
r>00
900
400
400
600
500
500
800
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
U.
0.
0.
0.
0.
0.
0.

0.
0.
0.
0.
0.
040
115
160
042
067
052
080
055

035
110
025
055
170
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
012
008
006
014
014
024
035
015
020
022
010
015
010
010
MG/L P
0.050
0.015
0.015
0.015
0.035
0.130
0.065
0.052
0.050
0.030
0.035
0.060
0.040
0.020

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  5108C1
                                                                 38 45 47.0 077 24 46.0
                                                                 BULL RUN
                                                                 51      7.5 MANASSAS
                                                                 I/OCCOOUAN RES
                                                                 BANK AT END OF YATES FORD RD
                                                                 11EPALES             2111204
                                                                 4                   0000 FEET
DEPTH

DATE
FROM
TO
73/07/15
73/08/12
73/09/08
73/10/14
73/11/11
73/12/08
74/01/20
74/03/03
74/03/10
74/04/21
74/05/19
74/05/31
74/06/08
74/06/21

TIME DEPTH
OF
DAY FEET
11 05
10 55
10 30
10 50
11 05
11 40
11 05
11 20
11 15
11 15
11 30
11 05
11 45
11 05
00630
NOf>c»N03
N-TOTAL
MG/L
1.260
l.OBO
1.000
1.640
2.060
0.870
1.060
0.830
0.840
0.680
1.100
1.520
0.176
1.600
00625
TOT KJEL
N
MG/L
0.990
2.600
3.150
1.150
1.850
0.600
0.500
1.700
1.400
0.700
1.900
0.800
0.700
0.600
OG610
NH3-N
TOTAL
MG/L
0.330
0.280
0.338
0.198
0.710
0.136
0.232
0.333
0.250
0.160
0.220
0.240
0.035
0.165
00671 ,
PMOS-DIS
ORTHO
MG/L P
0.560
1.380
0.710
0.920
1.000
0.360
0.120
0.260
0.260
0.185
0.260
0.250
0.005
0.330
00665
PHOS-TOT

MG/L P
0.650
1.450
0.830
1.050
1.250
0.450
0.160
0.350
0.345.
0.200
0.330
0.345
0.020
0.380

-------
STORET RETRIEVAL DATE 75/03/26
                                                                 38 44 10.0 077 21 52.0
                                                                 WOLF HUN
                                                                 51      7.5 OCCOUUAN
                                                                 T/OCCOQUAiM RES
                                                                 HENDERSON RO tiRDG 1.5 MI SW FARRS CORNER
                                                                 11EPALES             2111204
                                                                 4                   0000 FEET  DEPTH
DATE
FROM
TO
73/07/15
73/08/12
73/09/08
73/10/14
73/11/11
73/12/08
74/01/20
74/03/03
74/03/10
74/04/21
74/05/19
74/05/31
74/06/08
74/06/21
00630 00625
TIME DEPTH N02i>N03 TOT KJEL
OF N-TOTAL N
DAY FEET
1
1
1
1
1
12
11
11
12
12
12
11
12
11
34
30
00
30
45
30
30
55
00
00
15
30
10
30
MG/L
0
0
0
0
0
0
0
u
0
0
0
0
1
0
.230
.210
.115
.010*
.028
.052
.176
.100
.ioa
.020
.184
.104
.500
.160
MG/L
0.
1.
0.
0.
0.
0.
0.
0.
1.
0.
1.
0.
2.
0.
300
320
170
250
700
400
100K
500
200
300
500
200
400
600
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
025
075
168
024
032
012
028
040
045
027
085
035
175 •
115
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
021
024
017
006
012
005K
010
010
010
007
015
010
230
020
MG/L P
0.030
0.025
0.017
0.010
0.012
0.040
0.010
0.015
0.010
0.020
0.025
0.045
0.290
0.025
                     K VALUE KNOWN TO BE
                     LESS THAN INDICATED

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  510BFA          PR5108FA     P000150
                                                                 38 45 17.0 077 33 45.0
                                                                 LINTON HALL SCHOOL BRISTON
                                                                 51117   7.5 GAINESVILLE
                                                                 T/OCCOQUAN
                                                                 UNNAMED TRIB/BROAD RUN
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH

                      00630     00625     00610     00671     00665     50051     50053
  DATE   TIME DEPTH N02&N03   TOT KJEL   NH3-N    PHOS-DIS  PHOS-TOT    FLOW    CONDUIT
  FROM    OF        N-TOTAL      N       TOTAL     ORTHO                RATE    FLOW-MGD
   TO    DAY  FEET    MG/L      MG/L      MG/L     MG/L P    MG/L P   INST MOD  MONTHLY

73/10/16 11 00
CPU)-                 0.200    56.500    23.000     8.600    18.900     0.005     0.006
73/10/16 16 00
73/11/20 11 00
CPU)-                 0.310    56.000    13.000     6.200    16.000     0.005     0.005
73/11/20 16 00
74/01/04 11 00
CPU)-                 0.880    28.000     2.900     6.200    12.500     0.005     0.004
74/01/04 16 00
74/01/22 11 00
CPU)-                 0.920    45.000     3.000     6.300    12.000     0.005     0.003
74/01/22 16 00
74/02/12 11 00
CPU)-                 0.680    35.000     5.900     7.600    15.000     0.005     0.005
74/02/12 16 00
74/03/27 11 00
CPU)-                 0.400    39.000     6.000     8.200    22.000     0.005     0.005
74/03/27 16 00
74/04/22 11 00                                                           ,
CPU)-                 0.720    39.000     7.700     8.600    23.000     0.005     0.005
74/04/22 16 00
74/05/27 11 00
CPU)-                 0.280    52.000    22.000     9.000    19.000     0.005     0.003
74/05/27 16 00
74/06/25 11 00
CPU)-                 0.204    37.000    13.000    10.500    16.000     0.003     0.003
74/06/25 16 00
74/07/17 11 00
CPU)-                 0.360    35.000    21.000    12.500    13.500     0.003     0.002
74/07/17 16 00
74/08/12 11 00
CPU)-                 0.120    32.000    13.750    13.500    24.000     0.003     0.003
74/08/12 16 00
74/09/25 11 00
CPU)-                 0.500    46.000               6.600    13.000     0.003     0.003

-------
STORET RETRIEVAL UATE 75/03/2&
                      00630
  DATE   TIME DEPTH N02MM03
  FROH    OF        IM-TOTAL
   TU    DAY  FEET    MG/L
                                                                  5108FA          PW5108FA      P000150
                                                                 38 43  17.0 077  33 45.0
                                                                 LINTON HALL SCHOOL  BklSTON
                                                                 51117   7.5 GAINESVILLE
                                                                 T/OCCOUUAN
                                                                 UiMNAMEO T«Id/BKOAD  ftUN
                                                                 11EPALES              2141204
                                                                 4                    0000 FEET   DEPTH
74/10/07 11 00
0.320
00625
TUT KJEL
N
MG/L
46.000
00610
NH3-N
TOTAL
MG/L
17.000
00671
PHOS-OIS
OKTHO
MG/L P
13.000
00665
PHOS-TOT
MG/L P
22.000
50051
FLOW
RATE
INST MGD
0.003
50053
CONDUIT
FLOW-MGD
MONTHLY
0.003

-------
                 LiAlE 7b/u3/26
                                                                   5108HA           P05108HA     P000750
                                                                  38  37  30.0  077  31 00.0
                                                                  MARINE CORPS  SCHOOL  QUANTICO
                                                                  bl       7.5 NOKESVILLE
                                                                  T/OCCOUUON
                                                                  CtDAK ,RUN/OCCO(JUON RIVER
                                                                  HEPALES              2141204
                                                                  4                   0000 FEET   DEPTH
  DATE
  Ft-
73/10/03
73/11/07
CP(T)-
73/11/07
73/12/10
CP(T)-
73/12/lU
74/06/11
CP(T)-
74/06/11
7^/07/10
CP(T)-
74/07/10
74/08/14
CP(D-
74/08/14
 OF
UAY  FLtT

.06 00

20 00
'08 00

.20 00
08 00

20 00
08 00

20 00
08 00

20 00
08 00

20 00
«U63U
2ivN03
TOTAL
MG/L
3.9bO
0.320
1.20U
21.000
2.70.0
lb.000
00625
TOT KJEL
N
HG/L
0.900
1.700
22.000
14.000
l.OOOK
l.OOOK
00610
NH3-N
TOTAL
MG/L
0.23
0.92
12.80

0.16
0.13
          00671     00665     SOObl     50053
        PHOS-DIS  PHOS-IOT    FLOW    CONDUIT
         OP.THO                RATE    FLO*-MGD
         MG/L P    MG/L P   INST MGD  MONTHLY
 0.230     2.'600     3.600     0.152
 0.920     4.100     7.100     0.120
12.800     6.800     8.400     0.120
           1.800
           .0.480
3.300
0.765
0.106
0.180
 0.130     -1.450     1.900     0.120
                    0.152
                    0.120
                    0.120
0.120
0.100
                    0.157
                      K VALUE KNOWN TO BE
                      LESS THAN INDICATED

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  5108UB          P05108UB     P007500
                                                                 38 52 02.0 077 24 30.0
                                                                 FAIRFAX CO GREENNBRIAR PL CHANTI
                                                                 51      7.5 MANASSAS
                                                                 T/OCCOQUAN RESERVOIR
                                                                 BIG ROCKY RUN/CUB RUN/BULL RUN
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH

                      00630     00625     00610     00671     00665     50051     50053
  DATE   TIME DEPTH N02&N03   TOT KJEL   NH3-N    PHOS-DIS  PHOS-TOT    FLOW    CONDUIT
  FROM    OF
   TO    DAY  FEET

73/12/04 00 00
CP(T)-
73/12/04 24 00
74/01/03 «0 00
CP-
74/01/03 02 00
74/02/04 00 00
CPU)-
74/02/04 24 00
74/03/04 00 00
CP(T)-
74/03/04 24 00
74/04/04 00 00
CP(T)-
74/04/04 24 00
74/05/02 00 00
CP(T)-
74/05/02 24 00
74/06/04 00 00
CP(T)-
74/06/04 24 00
74/07/08 00 00
CP(T)-
74/07/08 24 00
74/08/06 00 00
CP-
74/08/06 24 00
74/09/05
74/10/02 00 00
CPU)-
74/10/02 24 00
74/11/06 00 00
CP(T)-
74/11/06 24 00
74/12/10 00 00
CP(T>-
74/12/10 24 00
OTAL
IG/L
2.000
1.080
0.400
0.680
0.200
0.280
0.200
0.160
0.400
0.240
1.160
1.200
0.800
N
MG/L
19.000
12.500
13.000
15.000
18.000
17.000
21.000
15.000
19.000
8.700
13.000
13.000
12.250
TOTAL
MG/L
10.600
6.800
4.300
7.100
8.800
10.500
11.500
11.000
9.000
12.600
9.700
6.100
7.900
ORTHO
MG/L P
6.800
4.400
4.400
4.900
4.700
4.700
5.300
2.800
1.950
1.720
2.100
2.600
1.280
RATE FLOW-MOD
MG/L P INST MGD MONTHLY
6.800
4.700
4.500
6.100
6.000
5.200
6.100
3.600
2.800
0.820
2.800
3.000
1.925
0.666
0.714
0.640
0.650
0.670
0.623
0.841
0.6B3
0.615
0.646
0.660
0.604
0.880
0.650
0.699
0.668
0.650
0.676
0.665
0.692
0.722
0.676
0.643
0.681
0.653
0.642

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  5108UA          AS5108UA     P002200
                                                                 38 50 00.0 077 27 02.0
                                                                 FAIRFAX CO ROCKY HUN PLANT FAIRE
                                                                 51      7.5 MANASASAS
                                                                 T/OCCOOUON RESERVOIR
                                                                 BIG ROCKY RUN/CUB RUN/BULL RUN
                                                                 11EPALES             2141204
                                                                 4                   oooo reer  DEPTH

                      00630     00625     00610     00671     00665     50051 '    50053
  DATE   TIME DEPTH N02&N03   TOT KJEL   NH3-N    PHOS-OIS  PHOS-TOT    FLO*    CONDUIT
  FROM    OF
   TO    DAY  FEET

73/12/04 00 00
CP(T)-
73/12/04 24 00
74/01/03 00 00
CP(T)-
74/01/03 02 00.
74/02/04 00 00
CP(T>-
74/02/04 24 00
74/03/04 00 00
CP-
74/03/04 24 00
74/04/04 00 00
CP(T)-
74/04/04 24 00
74/05/02 00 00
CP(T)-
74/05/02 24 00
74/06/04 00 00
CP(T)-
74/06/04 24 00
74/07/08 00 00
CP-
74/07/08 24 00
74/08/06 00 00
CP(T)-
74/08/06 24 00
74/09/05
74/10/02 00 00
CP(T)-
74/10/02 24 00
74/11/06 00 00
CP(T)-
74/11/06 24 00
74/12/10 00 00
CP < T) -
74/12/10 24 00
OTAL
IG/L
0.960
0.800
0.040
1.120
0.600
0.280
0.120
0.120
0.160
0.160
4.600
0.160
0.158
N
MG/L
8.000
7.250
11.000
5.500
7.400
21.000
26.000
24.000
20.000
18.500
2.000
13.000
15.500
TOTAL
MG/L
1.050
0.620
0.120
2.700
4.600
15.000
14.500
17.300
9.450
11.500
0.450
5.600
7.400
ORTHO
MG/L P
11.000
8.200
3.900
3.300
1.350
3.300
2.600
4.100
3.800
2.300
0.250
0.340
0.066
RATE FLOM-MGD
MG/L P INST MGD MONTHLY
12.500
9.800
4.365
3.780
1.680
4.100
3.400
4.100
4.600
2.400
0.640
0.770
0.275
0.188
0.186
0.183
0.164
0.186
0.180
0.203
0.19S
0.150
0.195
0.195
0.193
0.206
0.193
0.204
0.192
0.186
0.193
0.173
0.184
0.198
0.190
0.133
0.199
0.197
0.198

-------
STORET RETRIEVAL DATE 75/03/26
                                                                  5108TA          P05108TA     P002900
                                                                 38 52 15.0 077 27 05.0
                                                                 FAIRFAX CO FLATLICK PLANT FAIRFA
                                                                 51      FAIRFAX CO
                                                                 T/OCCOQUAN RESERVOIR
                                                                 FLATLICK BRANCH/CUB RUN
                                                                 HEPALES             2141204
                                                                 4        ,           0000 FEET  DEPTH

                      00630     00625     00610     00671     00665     50051     50053
  DATE   TIME DEPTH N02&N03   TOT KJEL   NH3-N    PHOS-DIS  PHOS-TOT    FLOW    CONDUIT
  FROM    OF
   TO    DAY  FEET

73/12/04 00 00
CP(T)-
73/12/04 24 00
74/01/03 00 00
CP(T)-
74/01/03 02 00
74/02/04 00 00
CP(T>-
74/02/04 24 00
74/03/04 00 00
CP(T)-
74/03/04 24 00
74/04/04 00 00
CP(T)-
74/04/04 24 00
74/05/02 00 00
CP(T)-
74/05/02 24 00
74/06/04 00 00
CP(T)-
74/06/04 24 00
7^/07/OB 00 00
CP(T>-
74/07/08 24 00
74/08/06 00 00
CP(T)-
74/08/06 24 00
74/09/05
74/10/02 00 00
CP-
74/11/06 24 00
74/12/10 00 00
CP(T>-
74/12/10 24 00
OTAL
IG/L
6.300
0.6<*0
3.000
7.400
4.200
8.300
1.440
0.040
0.820
5.000
7.300
«. 500
9.600
N
MG/L
2.300
10.500
6.800
3.000
1.700
14.000
5.000
15.000
7.300
1.500
4.200
2.900
2.130
TOTAL
MG/L
0.600
5.300
3.120
0.430
1.200
1.150
1.050
12.000
5.250
0.360
2.900
2.100
0.460
ORTHO
MG/L P
2.600
0.700
1.520
4.800
2.600
0.240
2.900
1.150
0.175
1.700

1.275
1.800
RATE FLOW-MOD
MG/L P INST MOD MONTHLY
2.600
1.000
1.900
5.500
3.000
0.410
3.300
1.500
0.660
1.800
1.200
1.300
2.130
0.281
0.339
0.301
0.316
0.333
0.304
0.371
0.325
0.372
0.363
0.323
0.309
0.389
0.308
0.326
0.353
0.324
0.328
0.339
0.322
0.335
0.324
0.335
0.353
0.329
0.329

-------
STORE! RETRIEVAL DATE 75/03/26
                                                                  5108VA          P05108VA     P004900
                                                                 3B SO 30.0 077 27 S2.0
                                                                 FAIRFAX CO MIDDLE CUB RUN PLANT
                                                                 SI      7.5 MANASSAS
                                                                 T/OCCOQUAN RESERVOIR
                                                                 CUB RUN/BULL RUN
                                                                 HEP ALES             2141204
                                                                 4                   0000 FEET  DEPTH
                      00630     00625
  DATE   TIME DEPTH N02(kN03   TOT KJEL
  FROM    OF
   TO    DAY  FEET

73/12/04 00 00
CP(T)-
73/12/04 24 00
74/01/03 00 00
CP-
74/01/03 02 00
74/02/04 00 00
CPU)-
74/02/04 24 00
74/03/04 00 00
CPU)-
74/03/04 24 00
74/04/04 00 00
CP(T)-
74/04/04 24 00
74/05/02 00 00
CPU>-
74/05/02 24 00
74/06/04 00 00
CP(T)-
74/06/04 24 00
74/07/08 00 00
CPU)- .
74/07/08 24 00
74/08/06 00 00
CPU1-
74/08/06 24 00
74/09/05
74/10/02 00 00
CP(T)-
74/10/02 24 00
74/11/06 00 00
CPU)-
74/11/06 24 00
74/12/10 00 00
CPU)-
74/12/10 24 00
OTAL
IG/L
0.260
0.960
0.680
2.880
0.760
0.400
0.440
0.240
0.240
1.320
1.440
2.320
3.520
N
MG/L
13.000
7.600
7.500
7.400
6.000
15.000
13.000
20.000
19.000
11.500
4.500
8.200
8.400
TOTAL
MG/L
5.250
3.500
4.400
2.900
3.300
7.700
4.600
12.500
11.500
5.150
1.950
6.200
6.400
                                          00610     00671     00665     50051 *    50053
                                         NH3-N    PHOS-DIS  PHOS-TOT    FLOW    CONDUIT
                                                   ORTHO                RATE    FLOW-MGD
                                                   MG/L P    MG/L P   INST MGD  MONTHLY
                                                     6.500
                                                     0.670
                                                     2.320
                                                     4.200
                                                     1.350
                                                     3.300
                                                     2.400
                                                     3.45*
                                                     0.890
                                                     0.260
6.500
                                                               1.600
2.800
                                                               4.900
1.650
3.900
2.70*
3.45*
                                                     2.400     2.550

                                                     1.600     1.950

                                                     2.200     2.200
1.100
0.425
0.590
                                                                         0.516
0.530
          0.525
0.588
                                                                         0.507
                                                                         1.607
                                                                         0.544
                                                                         I.SIS
                                                                         1.653
0.551
                                                                                   0.585
0.597
          0.560
0.558
          0.582
                    0.567
                    0.554
          1.521     0.553

          1.589     0.559

          1.531     0.575
          0.540
          0.550

-------
STORET RETRIEVAL DATE 75/03/36
                                                                  5108VB          P05108VB     P001500
                                                                 38 53 55.0 077 27 47.0
                                                                 FAIRFAX CO UPPER CUB RUN PLANT
                                                                 51      FAIRFAX CO
                                                                 T/OCCOQUON RESERVOIR
                                                                 UPPER CUB RUN/BULL RUN
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH
                      00630     00625
  DATE   TIME DEPTH N02&N03   TOT KJEL
  FROM    OF        N-TOTAL      N
   TO    DAY  FEET    MG/L      MG/L
73/12/04 00 00
CP(T)-
73/12/04 24 00
74/01/03 00 00
CP-
74/07/08 24 00
74/08/06 00 00
CP(T)-
74/08/06 24 00
74/09/05
74/10/02 00 00
CP(T>-
74/10/02 24 00
74/11/06 00 00
CP(T)-
74/11/06 24 00
74/12/10 00 00
CP(T)-
74/12/10 24 00
 00610     00671     00665     50051     50053
NH3-N    PHOS-DIS  PHOS-TOT    FLOW    CONDUIT
TOTAL     ORTHO                RATE    FLOM-MGD
 MG/L     MG/L P    MG/L P   INST MGD  MONTHLY
6.400
4.000
0.040
0.480
0.720
1.040
U.160
0.120
0.200
0.880
1.080
0.080
2.400
3.100
2.800
8.250
9.400
7.300
16.000
17.000
15.000
16.000
4.800
2.700
16.000
3.400
0.610
0.114
0.080
5.750
5.200
9.600
14.000
13.000
13.000
2.800
1.950
12.000
2.300
12.600
6.450
5.900
3.500
0.400
0.720
0.960
0.830
0.295
0.290
0.260
0.900
0.094
13.500
7.000
5.900
4.100
0.850
1.550
1.350
1.250
0.580
0.430
0.390
1.300
0.250
0.165
0.177
0.183
0.160
0.168
0.140
0.169
0.213
0.128
0.151
0.146
0.188
0.195
0.172
0.194
0.180
0.177
0.171
0.174
0.181
0.174
0.181
0.164
0.170
0.160
0.181

-------
STORE! RtThiltVAL OAlc. 75/03/26
                                                                   5108WA           TF5108WA
                                                                  38 46  13.0  077  27 <*5.0
                                                                  US ARMY VINT  HILL PLANT  *  1
                                                                  51      7.5 MANASSAS
                                                                  0/OCCOUUON  RESERVOIR
                                                                  OCCOUUON  RESERVOIR
                                                                  11EPALES              2141204
                                                                  4                   0000 FEET
DEPTH
DATE
FKUM •
TO
74/01/24
74/02/26
74/03/15
74/04/15
74/05/16
74/06/17
7^/07/16
74/08/15
74/09/lb
7W10/15
74/11/15
74/12/23
75/01/15
00630 00625
TIME UtPTH H02«>N03 TOT KJEL
OF ,\l- TOTAL N '
DAY FEEF
10
08
08
08
08
U8
10
08
Od
08
08
14
03
00
00
00
00
00
00
00
00
00
00
00
30
15
MG/L
8.700
21.0oO
5.880
17.000
lea. 8oO •
6.300
B.670
1 J.600
y.70o
1 1.600
lo. 100
^.200
8.200
MG/L
16.000
12.000
27.000
6.400
6.900
6.700
7.500
8.300
4.850
4.700
10.000
13.cOO
6.200
00610 00671
NH3-N PMOS-DIS
TOTAL OKTHO
MG/L
5.800
4.600
12.500
1.125
0.810
0.890
0.430
0 . 390
0.430
0.260
0.057
0.310
O.OdOK
MG/L P
6.300
10.000
7.000
7.950
7.100
5.600
7.600
7.600
6.400
11.500
6.200
5.000
4.600
00665
PHOS-TOT
50051 50053
FLOW CONDUIT
RATE FLOW-MGO
MG/L P INST MGD MONTHLY
10.500
11.000
11.000
10.000
8.000
7.100
9.150
,3.600
7.900
13.500
8.300
6.400
5.500
0.105
0.070
0.072
0.056
0.071
0.072
0.064
0.059
0.050
0.034 -
. 0.055
0.051 .
0..073
0.080
0.067
0.070
0.065
0.063
0.067
0 . 065
0.0.57
0.079
, 0.039
0.058
0.089
0.054
                  K VALUE KNOWN TO BE
                  LESS THAN INDICATED

-------
STOKET RETRIEVAL OAft 75/03/2&
                                                                   5108wd          TF5108WB
                                                                  38  44 30.0 u77 40 30.0
                                                                  US  ARMY ViiMT (HILL PLANT * 2
                                                                  bl       7.5 CATLETT
                                                                  0/OCCOQUAN HESEKVOIR
                                                                  OCCOUUAN HtESErtVOIK
                                                                  11EPALES             2141204
                                                                  *                   0000 FEET
DEPTH
  DATE
          OF'
   ro    UAY  FEET
74/01/15
74/02/26
74/03/ Is
74/04/15
74/05/16
74/06/17
74/07/16
74/Od/ 15
74/09/16
74/ 10/ 15
74/11/15
74/12/23
75/01/15
08
08
08
OH
08
08
10
Ob
08
08
v/8
13
08
00
00
00
00
00
15
30
00
15
15
15
30
30
00630
2&.N03
TOTAL
MC--/L
8 .60 0
14.400
12.000
i.OuO
7.000
5.52u
6.240
9.200
8.350
3.400
11 .000
^.800
10.00 J
006?5
TOT KJ£L
N
•4G/L
3. 700
4. 7 JO
3.650
3.300
5.450
4.900
2.000
5.600
1 . 700
2.400
1.600
6.500
6.400
00610
NH3-N
TOTAL
MG/L
1.360
1.650
u.200
U.360
0.370
0.325
0.120
0.320
0.225
0.35o
O.OH2
4.200
0.080K
00671
PHOS-DIS
OHfTHO
MG/L P
7.200
10.500
11.500
8.900
10.500
6.700
12.550
11.500
9.800
13.500
111. 300
9.000
0.140
00665
PHOb-TOT

MG/L P
7.900
lo.50o
12.500
9.900
12.500
7.600
13.800
12.000
9.ttOO
14.000
10.500
9.300
8.400
50051
FLOW
RATE
INST MGO
0.095
0.073
0.069
0.079
0.080
0.080
0.063
0.067
0.065
0.056
0.055
0.056
0.092
50053
CONDUIT
FLOW-MOD
MONTHLY
0.080
0.067
0.070
0.090
0.075
0.070
0.061
0.062
0.082
0.050
0.054
0.096
0.058
                  K  VALUE  KNOWN TO BE
                  LESS  THAN INDICATED

-------
STOP.ET
                    i 7S/OJ/26
                                                                   5108XA          TF5108XA     P008000
                                                                  38 46 15.0 077 27 45.0
                                                                  TOwN OF MANASSA NORTHSIDt STP
                                                                  bl      7.5 MANASSA
                                                                  T/OCCOUUAN kESLRVOIK
                                                                  FLAT BWOOK
                                                                  11EPALES             2141204
                                                                  4                   0000 FEET   DEPTH
  DATE-
  •pHOM
   •TO
         TIME
          OF
         UAY  FE£T
  i;t-6Jv*     00625     OJ610      00671      u0665     50051     50053
uU-?M\i03   TOT KJEL   NHj-N •   PnOS-OIS   PHOS-TOT     FLO*    CONDUIT
<>1-TOTAL      N       TOTAL      OKTHO                 RATE    FLOw-MGO
  MG/L      MG/L      M'j/L      MG/L P     MG/L  P   INST MoD  MONTHLY
73/12/06
CP( T) -
7j/12/07
74/01/23
CP(T)'-
74/ol/2^*
74/02/25
CP(T>-
74/vj2/26
74/03/20
CPU>-
74/u3/21
74/0^/30
CP(T)-
74/04/30
7^/06/Oj
74/0//31
CH(T)-
74/Od/O1
74/0^/03
7t/10/01
7^/11/01
74/12/02
75/01/01
08 00

08 00
08 GO

08 00
08 00

08 00
08 00-

OH 00
00 00

24 00
IS 00
05 00
08 00

08 00
12 45
10 30
10 30
11 00
16 35
                        v.bc-j     23.000
                                           13.000      0.535     2.350     0.452     0.617
   1..
   Li.200
j.176
                        o*32'J

                        j . 7bo
                        •».600

                        ;? • b (Ji (J
                                 11.000
                                 18.000
                                 19.000
            19.000

            1 3 . • j 0 0
            17.000

            22.000
 4.fcOO     C.350
                                            ri.900
                                           13.500
13.000

 7.70o
10.500

i-,.920
G.728
                              0.280

                              0.350
                              0.750

                              0.180
                                                                1.9DO
                                            2.000
          0.770

          1.000
          0.910

          0.550
                                                   1.330      0.990
           1.950     3.500     0.486      0.974
                               0.446
0.465

1.500
0.545

0.364
                                                                                    0.489
0.780

0.875
0.696

0.393
2.160
2.52;>
2.240
2.<*oy
0.40 J
18.000
1 7 . (j o u
19.000
H.'+OO
11.000
If .000
12.500
Ib.oOO
6.800
i 0 . 0 0 0
0.160
0. 170
0.140
0. 180
0.078
0.250
0.700 "
0.480
1.400
0.400
0.520
0.375
0.365
1.910
0.523
0.367
0.515
0.364
0.460


-------
STOKET kETrtlEVAL tJAFt 7b/03/26
                                                                  5108YA          P05108YA     P004400
                                                                 38 45 58.0 077 28 28.0
                                                                 TOWN OF MANASSAS LIbEkIA PLANT
                                                                 51      7.b MANASSAS
                                                                 T/OCCOO.UON KESERVOIH
                                                                 UNNAMED STKEAM/FLAT LICK UkANCH
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH
GATE
FKOM
TO
73/12/06
CP(T>-
73/12/06
74/01/23
CP(T)-
74/U1/24
74/02/25
CP-
74/03/21
74/04/30
CP-
74/04/30
74/06/0.3
74/07/02
74/07/31
CP(T)-
74/08/01
74/09/03
74/10/01
7<*/ll/01
74/12/02
75/01/01
U0630
TIME DEPTH iJ02oN03
OF N- TOTAL
DAY FEET rto/L
03

08
08

08
03

03
08

08
00

24
15
07
OH

08
11
11
10
10
17
00

00
00

00
00

00
00

00
00

00
00
00
00

00
55
30
00
30
10

j.230


j.480


u.240


0.1 2'J


^.700

5.600
1.660

b.600

7. bOO
6.900
7.3uo
b.400
2.880
0062b
TOT KJEL
N
MG/L

30.


7.


16.


26.


9.

7.
7.

6.

b.
7.
9.
10.
11.

000


000


000


000


000

000
600

loo

600
800
9oO
000
000
00610 00671
NHJ-N PnOS-OlS
TOTAL U^THO
MG/L MG/L P

29.000


jj.500


8.100


10.000


6.100

4.400
S.200

3.4bu

4.000
4.800
8.100
3.800
8.300

0.120


0.370


3.700


8.600


l.ObO

0.560
0.390

a. 460

0.350
0.200
0.790
0.140
0.120
00665 50051 50053
PHOS-TOT FLOW CONDUIT
RATE FLOw-MGD
MG/L P INST MGD MONTHLY

0.710


t.880


7.700


10.000


1.450

0.670
O.bOO

0.460

0.393
0.400
0.730
0.700
0.230

0


0


0


0


0

0
0

0

0
0
0
0
0

.201


.151


.424


.267


.132

.150
.261

.183

.259
.156
.164
.950
.325

0.273


0 . 203


0.250


0.164


0.145

0.130
0.218

0.200

0.191
0.158
0.196
0.187


-------
STORET RETRIEVAL OftTS. 75/03/26
                                                                  510BYB          AS5108YB
                                                                 38 47 45.0 077 27 26.0
                                                                 TOWN OF MANASSAS NORTH
                                                                 51      7.5 MANASSAS
                                                                 T/OCCOQUON RESERVOIR
                                                                 bULL RUN
                                                                 11EPALES             2141204
                                                                 4                   0000 FEET  DEPTH
DATE
FROM
TO
73/11/30
CP-
73/11/30
73/12/30
CPITl-
73/12/30
74/01/31
cpm-
74/01/31
74/02/28
CP-
74/02/2^
74/03/28
CP(T>-
74/03/2H
74/04/30
CP-
74/05/31
74/U6/30
CP-
74/06/30
74/07/31
CP-
74/U7/31
74/0(4/31
CP(T)-
74/ud/31
74/09/30
CP(T)-
74/04/30
74/10/31
CP(T>-
74/10/31
00630
TIME DtPTH N02«iN03
OF N-TOTAL
OAr FEET MO/L
11

16
11

16
11

16
11

16
11

16
10

16
11

16
11

16
11

16
11

16
11

16
11

16
00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00

5.2uO


2.320





u.160


1.440


2.900


2.60u


- 3.680


2.520


1.200


l.Suu


1.200

00625
TOT KJEL
N
MG/L

17.


7.





16.


20.


20.


13.


14.


19.


17.


19.


19.


000


SOU





000


ooc


000


000


000


000


250


soo


000

00610 00671 00665 50051 50053
NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLOW-MOD
MG/L MG/L P MG/L P 1NST MGD MONTHLY

7.100 11.600


O.U40K 2.400





5.950 6.600


7.200 7.800


B. 900 9.000


3.400 6.800


4.200 9.100


6.600 6 .-050


6.000


10.000 5.400


9.150 7.300


13.500


3.400





7.500


tt. 400


10.000


8.U50


10.000


10.000


7.050


U.200


9.100


0


0


0


0


0


0


0


0


0


0


0


0


.970


.170


.243


.158


.133


.185


.129


.160


.111


.187


.175


.139


0.


0.


0.


0.


0.


0.


0.


0..


0.


0.


0.


0.


830


258


337


176


163


248


186


206


124


153


204


143

                    K  VALUE  KNOWN  TO  BE
                    LESS  THAN  INDICATED

-------
STORET KETKIEVAL DATE
                       w u ^> 3 \j
  DATE   TIMff DtPTrt N0^6,N03
  FKUM    OF        iM-TOT AL-
   TO    DAY  FEET     MG/L
7^/11/28 11 00
CP
-------
bTOKC.1
                                                                                   AS510«rC      P003500
                                                                 36 47 45.0 077  27 26.0
                                                                 TO*N OK MANAbSAS  SOUTH
                                                                 51      7.5 MANASSAS
                                                                 T/OCCOUON KESEKVOIK
                                                                 OULL KON
                                                                 HtPALtS              2141204
                                                                 4                   0000 FEET   DEPTH
OATH
FhiOM
Tu
74/02/2*
74/u 3/2'-1
CP(T)-
74/03/2*
74/04/30
CP( n-
7<+/04/3u
74/.j5/3l
O-
74/05/31
74/^6/30
CP ( T) -
74/ub/3u
74/ij7/31
CP(T)-
74/j7/31
74/OH/3 1
CP(T)-
74/03/31
74/u9/ 3u
CP ( T) -
74/o9/3j
74/K/31
om-
74/lo/3l
74/11/2^
Cf( D-
r u-i
OF
'JAY
1?
11

16
10

Ib
11

16
11

16
11

16
11

16
11

lh
11

16
11

t DtHTn

FLLT
00
d'j

00
o.o

•iO
00

00
00

ao
bo

00
00

OU
ou

00
00

00
00

uo63u o06?b U','610 00671 OObbb
•jO?M'xi03 TOT KJEL i\iH3-N PnOS-OIS PHOb-TOT
•J-luTAL !M FuTAL OK I HO
M-3/L lvlb/L Mb/L MG/L P MG/L
l.2uu 22.^uJ 11. SOU 10.500 13.

o.Voj 11.000 2.100 ^.150 10.


•^.li.-G1 b.«00 ;y.24'j 10.500 12.


.-f.b^j 7.30J u.lbO 3.3oO 4.


7.40'J . V.r-.'JCJ 0.400 9.00'J 9.


12.UJJ 1.3-Su . u.23o . lo.OOO 10.


v . 3 d u 4.000 0.0/0 1 .


ll.bi/G l.^OU 1.3 'JO 1.


lo.OuJ 2.oOO 1.65'J u.l IS 2.


I--1. .4>jj l.Vuo ;/ .IttJ 9.7bv) v.
50051
FLO*
P.ATE
. p
000

000


bOO


B50


600


750


350


«50


900


750
INST
0

0


0


0


0


.0


0


0


0


0
MGO
.139

.144


.136


.115


.171


.148


.140


.Ifa4


.106


.115
50053
CONDUIT
FLO*-MGL>
MONTHLY
0

0


0


0


0


0


0


U


0


0
.173

.145


.206


.148


.175


.157


.124


.168


.129


.120
74/11/28  16 00

-------
STORE! RETRIEVAL DATE 75/03/26
                                                                  5108ZA           P05108ZA     P006800
                                                                 38  47  45.0  077  28 20.0
                                                                 GREATER  MANASSAS  OLD  CENTERVILLE
                                                                 51       7.5 MANASSAS
                                                                 T/OCCOOUON  RESERVOIR
                                                                 BULL RUN
                                                                 11EPALES             2141204
                                                                 4                  0000  FEET   DEPTH
DATE
FROM
TO
73/11/30
CP < T ) -
73/11/30
73/12/28
CP(T)-
73/12/23
74/01/28
CP(T>-
74/01/28
74/02/25
CP-
74/02/25
74/03/28
CP(T>-
74/03/28
74/04/30
74/05/28
CP(T)-
74/05/28
74/06/30
CP(T>-
74/06/30
74/07/30
CP < T ) -
74/07/30
74/08/27
74/09/24
CP(T)-
74/09/24
74/10/28
CP(T)-
74/10/28
00630 00625 00610 00671 00665 50051 50053
TIME DEPTH H02&N03 TOT KJEL NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
OF N-TOTAL N TOTAL ORTriO RATE FLOW-MGO
DAY FEET MG/L MG/L M(j/L MG/L P MG/L P INST MGO MONTHLY
00 00
14.700 1.900 0.040 1.900 1.280 1.190
24 00
00

24
00

24
00

24
00

24

00

24
00

24
00

24

00

24
00

24
00

00
00

00
00

00
00

00

00

00
00

00
00

00

00

00
00

00

2


s


10


11

7

10


12


tt

8

10


11


.900


.700


.100


.200

.920

.800


.600


.300

.900

.000


.200


2


1


1


2

2

2


0


3

1

0


2


.000
*

.OOOK


.900


.325

.500

.700


.700


.000

.OOOK

.975


.600


0.050


0.110

-
0.130


0.130

0.130

0.380


0.069


0.050

0.078

0.058


0.072


0.320


0.080


0.220


0.230

0.700

1.400


0.770


0.720

0.830

0.860


0.320


0.410


0.240


0.410


0.420

0.990

2.200


0.915


1.150

1.450

1.000


3.600


2.520


2.340
*

1.410


1.180

1.530

1.240


1.200


1.150

1.450

1.190


1.470


2.920


2.420


1.370


1.390

1.640

1.570


1.730


1.220

1.320

1.840


1.220

                    K VALUE KNOWN TO BE
                    LESS THAN INDICATED

-------
KETKIEVAL
                                                                           Po5108Zd     POOdOOO
                                                          36 47 45.0 077 28 20.0
                                                          GrttATEK MANASSAS LOCH LOMANJ
                                                          Si      7.5 MANASSAS
                                                          r/OCCOUUUN HESERVOlk
                                                          BULL KUN
                                                          HtPALES             2141204
                                                          <*                   0000 FEET  DEPTH
                                   a <, 6 1 u
DATt!
FP.UM
TO
73/1 1/2H
73/12/2*
74/01/2H
74/02/25
74/u3/28
CP(T)-
74/03/2*
74/04/30
CH(T)-
74/U4/3U
74/05/28
CP(T>-
74/u5/2rt
74/06/30
CPCD-
74/06/30
74/07/30
CP ( T ) -
74/07/3U
74/08/27
O-
74/08/27
74/09/24
CH(T)-
74/09/24
74/lo/2ri
om-
74/1^/28
TI'--
OK
'E Ot°Ti-
OAY FEET
14
13
10

09

15
09

15
00

24
•J9

15
09

15
09

15
09

15
U9

15
00
30
30

00

00
00

00
00

00
00

00
00

00
00

00
00

00
00

00
^ N02&N03 TUT
•N-luTAL N
M'i/L MG
1.32j 17
2.900 8
(j.56u 12
.; . 6 o 0 15

U.b20 16


1 . u u 0 8


0.53-J 5


u.Hlo 5


2.760 3


b.2o^ 3


2.3UO 15


4.320 2

KJtL
/L
.30u
.900
.0 JO
.000

.oOO


.600


.500


.500


.000


.500


.000


.700

NH3-h PhOb-L)IS PHOb-TOT
TOTAL UKTHO
M'j/L MG/L P
i'.OOO 6
•J.230 1
1.160 1
b.300 2

5.300 1


u.2dO U


0


0.120 0


J . 1 4 0 0


u.l 20 1


o.790 1


j.130 1

.4u J
.BOO
.760
.300

.950


.850


.780


.920


.640


.750


.700


.80C

MG/L
6.
1.
3.
4.

3.


1.


1.


1.


0.


1.


2.


3.

FLOW CONDUIT
RAIL FLOW-MGO
P iusr
600
900
175
200

000


350


000


050


860


750


300


400

0
1
1
0

0


u


0


1


0


0


0


0

MtjO MONTHLY
.380
.900
.340
.720

.850


.420


.890


.250


.810


.600


.890


.470

0.545
1.040
1.200
0.990

0.880


0.860


0.770


0.970


0.740


0.650


1.060


0.870


-------