U.S. ENVIRONMENTAL PROTECTION AGENCY
               NATIONAL EUTROPHICATION SURVEY
                         WORKING PAPER SERIES
                                              REPORT
                                                ON
                                             HARRIS POND
                                    DORCHESTER COUMY, MASSACHUSETTS,
                                                AND
                                     PROVIDENCE COUNTY, RHODE ISLAND
                                            EPA REGION 1
                                         WORKING PAPER No, 27
          PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
                         An Associate Laboratory of the
             NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVAUIS, OREGON
                                  and
       NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA

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                                    REPORT
                                      ON
                                  HARRIS POND
                       WORCESTER COUNTY, MASSACHUSETTS,
                                      AND
                        PROVIDENCE COUNTY, RHODE ISLAND
                                 EPA REGION 1
                             WORKING PAPER No,  27
      WITH THE COOPERATION OF THE
RHODE ISLAND STATE DEPARTMENT OF HEALTH,
    THE RHODE ISLAND NATIONAL GUARD,
                 AND THE
FlASSACHUSETTS WATER RESOURCES COMMISSION
             SEPTEMBER, 1974

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1
CONTENTS
Page
Foreword ii
List of Rhode Island Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Introduction 3
III. Lake and Drainage Basin Characteristics 4
IV. Lake Water Quality Summary 5
V. Nutrient Loadings 10
VI. Literature Reviewed 15
VII. Appendices 16

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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to 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
Surveys eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impicts can be construct d.
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 [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)], clean lakes [ 3l4(a,b)],
and water quality monitoring [ lO6 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.

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111
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 Rhode Island Division of
Water Supply and Pollution Control and the Massachusetts Division
of Water Pollution Control for professional involvement and to
the Rhode Island National Guard for conduct of the tributary
sampling phase of the Survey.
Carleton A. Maine, Chief, and James W. Fester, Principal
Sanitary Engineer of the Rhode Island Division of Water Supply
and Pollution Control ; and Thomas C. McMahon, Director, John R.
Elwood, Supervisory Sanitary Engineer, Eben Chesebrough, Senior
Chemist, and Peter A. Tennant, Senior Sanitary Engineer of the
Massachusetts Division of Water Pollution Control provided inval-
uable lake documentation and counsel during the course of the
Survey.
Major General Leonard Holland, the Adjutant General of Rhode
Island, and Project Officer Colonel Clarence Bozar, who directed
the volunteer efforts of the Rhode Island National Guardsmen, are
also gratefully acknowledged for their assistance to the Survey.

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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF RHODE ISLAND
LAKE NAME COUNTY
Harris Pond Providence, RI;
Worchester, MA
Slatersville Reservoir Providence, RI
Turner Reservoir Providence, RI;
Bristol, MA

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V
Mass.
HARRIS POND
® Tributary Sampling Site
x Lake Sampling Site
Sewage Treatment Facility

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HARRIS POND
STORET NO. 2503
I. CONCLUSIONS
A. Trophic Condition:
Survey data show that Harris Pond is eutrophic. During the
sampling year, the Pond exhibited marked depression or depletion
of dissolved oxygen in the hypolimnion, rather high levels of
nutrients, low Secchi disc transparencies, and relatively high
chlorophyll a concentrations.
B. Rate-Limiting Nutrient:
The results of the algal assay indicate that Harris Pond
was phosphorus limited at the time the assay sample was col-
lected. However, the Pond data indicate that the Pond may
be narrowly phosphorus limited or even nitrogen limited at
times.
C. Nutrient Controllability:
1. Point sources—-During the sampling year, Harris Pond
received a total phosphorus load at a rate nearly three times
that proposed by Vollenweider (in press) as “dangerous (i.e.,
a eutrophic rate; see page 14). It is estimated that about
76% of this load was contributed by the Hopedale wastewater
treatment plant and the plating rinse discharge of the Draper
Corporation textile machinery plant just upstream from Hope-
dale.

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2
At this time, the Massachusetts Division of Water Pollution
Control is negotiating with the community of Hopedale regarding
provision of phosphorus removal with a mean effluent limit of
1 mg/i.
It is calculated that this degree of phosphorus removal at
Hopedale and elimination of the Draper Corporation discharge
would reduce the phosphorus loading rate of Harris Pond from the
existing 58 lbs/acre/yr to 31 ibs/acre/yr, or about 3.5 g/m 2 /yr.
While the reduced loading rate would still be somewhat greater
than a eutrophic rate, it is believed that the reduction would
result in improvement of the trophic condition of Harris Pond once
a new phosphorus equilibrium is attained.
2. Non-point sources--The mean annual non-point phosphorus
export of Quick Stream was relatively low (see page 14); and al-
though the Mill River phosphorus export was somewhat higher, it
appears that the methods used to calculate point-source phosphorus
contributions to Harris Pond provided reasonable estimates.

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II.   INTRODUCTION
     Harris  Pond is  a  small  impoundment  on  the  Mill  River  in  Worchester
 County,  Massachusetts,  with the  dam located  just  across the  state  line
 in  Rhode Island*.   The  Pond is controlled  by the  City  of  Woonsocket,
 Rhode Island.
     The  Pond serves as  a water supply for  Woonsocket and  also  provides
 some recreational  use.   Harris Pond is  not considered  a good fishery;
 but pickerel,  largemouth bass, and panfish are present.
     In the  past, algae  accumulations along the shorelines have been
 noted, but  the State of Massachusetts has  not  received any complaints
 concerning  algal blooms or  excessive water weed production.
 * Although the Pond is almost entirely within the State of Massachusetts,
   the State of Rhode Island requested the Survey study.

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4
III. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry:
1 . Surface area: 88 acres.
2. Mean depth: 8* feet.
3. Maximum depth: 25 feet.
4. Volume: 704 acre/feet.
5. Mean hydraulic retention time: 6 days.
B. Tributary and Outlet:
(See Appendix A for flow data)
1 . Tributaries -
Name Drainage area** Mean flow**
Mill River 28.7 mi 2 50.0 cfs
Quick Stream 2.2 mi 2 3.8 cfs
Minor tributaries & 2
immediate drainage - 2.1 mi 3.8 cfs
Totals 33.0 mi 2 57.6 cfs
2. Outlet -
Mill River 33.1 mi 2 57.6 cfs
C. Precipitation :
1. Year of sampling: 58.6 inches.
2. Mean annual: 40.3 inches.
* Estimated (Tennant, 1974a).
** Drainage areas are accurate within ±1%; gaged flows are accurate
within ±15%; and ungaged flows are accurate within ±20%.
± Includes area of Pond.
ft See Worki ng Paper No. 1, 1 Survey Methods”.

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5
IV. LAKE WATER QUALITY SUMMARY
Harris Pond was sampled three times during the open-water season
of 1972 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from two
stations on the lake and usually from a number of depths at each
station (see map, page v). During each visit, a single depth-
integrated (15 feet or near bottom to surface) sample was composited
from the stations for phytoplankton identification and enumeration;
and during the last visit, a single five-gallon depth-integrated
sample was composited for algal assays. Also each time, a depth-
integrated sample was collected from each of the stations for chloro-
phyll a analysis. The maximum depths sampled were 5 feet at station
1 and 23 feet at station 2.
The results obtained are presented in full in Appendix B, and
the data for the fall sampling period, when the lake was essentially
well-mixed, are summarized below. Note, however, the Secchi disc
summary is based on all values.
For differences in the various parameters at the other sampling
times, refer to Appendix B.

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6
A. Physical and chemical characteristics:
FALL VALUES
(10/06/72)
Parameter Minimum Mean Median Maximum
Temperature (Cent.) 11.2 14.7 15.1 17.1
Dissolved oxygen (mg/i) 0.0 5.6 3.4 12.0
Conductivity (pmhos) 128 137 135 155
pH (units) 6.3 7.2 6.6 8.6
Alkalinity (mg/l) 12 16 17 18
Total P (mg/i) 0.033 0.066 0.070 0.123
Dissolved P (mg/i) 0.013 0.030 0.023 0.076
NO + NO (mg/l) 0.070 0.261 0.180 0.530
Am1 onia mg/l) 0.100 0.620 0.170 2.820
ALL VALUES
Secchi disc (inches)
18 30
36 40

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7
B. Biological characteristics:
1 . Phytoplankton* -
Sampling Dominant Number
Date Genera per ml
08/01/72 1. Gloeocapsa 1,138
2. Dinobryon 264
3. Schroederia 188
4. Anabaena 106
5. Scenedesmus 98
Other genera 429
Total 2,223
10/06/72 1. Fragilaria 2,415
2. Melosira 1,509
3. Dictyosphaerium 1,472
4. Flagellates 1,207
5. Cyclotella 1,019
Other genera 3,586
Total 11,208
2. Chlorophyll a -
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a
Date Number ( pg/l )
06/04/72 01 2.5
02 1.0
08/01/72 01 47.2
02 2.5
10/06/72 01 10.8
02 13.7
* The June phytoplankton sample was lost in shipment.

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8
Maximum yield
( mg/l y wt. )
7.5
14.0
11.5
13.0
12.5
60.4
6.4
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N
Spike (nig/l) Conc. (mg/l) Conc. (mg/l ) ____ _____
Control 0.020 0.545
0.006 p 0.026 0.545
0.012 P 0.032 0.545
0.024 P 0.044 0.545
0.060 P o.oeo 0.545
0.060 P + 10.0 N 0.080 10.545
10.0 N 0.020 10.545
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential primary productivity
of Harris Pond was relatively high at the time the sample
was collected.
The addition of the first increment of phosphorus stimu-
lated an increase in yield which indicates Harris Pond was
phosphorus limited (note that the addition of only nitrogen
resulted in a yield not significantly different than the
control yield). However, further increments of orthophos-
phorus did not result in additional increases in yield,
indicating the Pond was narrowly phosphorus limited at the
time the sample was collected.
Pond data also indicate Harris Pond was phosphorus limited,
especially during the June and October sampling periods (nitro-
gen/phosphorus ratios were 29/1). However, Pond data from the

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9
August sampling period indicate the limiting nutrient probably
was nitrogen (the nitrogen/phosphorus ratio at station 1 was
9/1 and at station 2 averaged 13/1).
0. Trophic Condition:
During the sampling year, Harris Pond was characterized by
marked depression or depletion of dissolved oxygen in the hypolim-
nion, rather high nutrient levels, poor Secchi disc transparencies,
and relatively high chlorophyll a values.
Historically, the Pond has experienced some accumulations of
algae along the shorelines, and some rooted aquatic weeds grow in
the near-shore areas. However, the State of Massachusetts has not
received any complaints concerning algal blooms or excessive aquatic
weed growth. In part, this may be due to the use of copper sulfate
by the City of Woonsocket in this water-supply reservoir (Fester,
1974).
Personnel of the Massachusetts Division of Water Pollution
Control consider Harris Pond to be eutrophic (Tennant, 1974a).

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10
V. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Rhode Island National
Guard collected monthly near-surface grab samples from each of the tribu-
tary sites indicated on the map (page v), except for the high runoff
months of March and April when two samples were collected. Sampling was
begun in August, 1972, and was completed in July, 1973.
Through an interagency agreement, stream flow estimates for the year
of sampling and a “normalized” or average year were provided by the New
England District Office of the U.S. Geological Survey for the tributary
sites nearest the lake.
In this report, nutrient loads for sampled tributaries were calculated
using mean annual concentrations and mean annual flows. Nutrient loadings
for unsampled “minor tributaries and imediate drainage” ( “ZZ” of U.S.G.S.)
were estimated using the mean annual concentrations in Hop Brook at station
C-l and the mean annual ZZ flow.
The discharges of the Hopedale wastewater treatment plant and the Draper
Corporation plant were not sampled during the Survey, and the phosphorus
loads attributed to these sources were estimated as outlined in Appendix D.
The nitrogen load from the Hopedale plant was determined by the difference
in load in the Mill River from station A-3 (above the plant) to station A-4
(below the plant); the nitrogen load from the Draper Corporation is based
on information provided by the Massachusetts Division of Water Pollution

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11
Control (Tennant, 1974b). In the nitrogen loading table, the load given
for the Mill River is that measured at station A-i minus the point-source
loads.
As noted before, Harris Pond serves as a water supply for the City of
Woonsocket. The nutrient losses from the system through this use were not
determined. Only the estimates of net annual phosphorus and nitrogen ac-
cumulations would be affected in any case.
A. Waste Sources:
1. Known municipai* -
Pop. Mean Receiving
Name Served Treatment Flow (mgd) Water
Hopedale 2,500 trickling 0.300 Miii River
filter
2. Known industriai** -
Mean Receiving
Name Product Treatment Flow (mgd) Water
Draper Corp. textile none (plating ? Mill River
machin- rinse waters)
e ry
* Tennant, 1973.
** Tennant, 1974b.

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12
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
lbs P1 % of
Source yr total
a. Tributaries (non-point load) -
Mill River 1,770* 20.8
Quick Stream 110 1.3
b. Minor tributaries & imediate
drainage (non-point load) - 120 1.4
c. Known municipal SIP’s -
Hopedale 5,390* 63.3
d. Septic tanks - Unknown
e. Known industrial** -
Draper Corporation 1 ,110* 13.1
f. Direct precipitation’ - 10 0.1
Total 8- -5l-0- 100.0
2. Outputs - (7c; 7
Lake outlet - Mill River 5,560
3. Net annual P accumulation - 2,950 pounds
* Estimated; see Appendix D.
** Tennant 1974b.
t Estimated; see Working Paper No. 1

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13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs —
lbsN/ %of
Source yr total
a. Tributaries (non-point load)
Mill River 59,360 61.5
Quick Stream 3,600 3.7
b. Minor tributaries & immediate
drainage (non-point load) - 3,760 3.9
c. Known municipal STP’s -
Hopedale 26,380 27.3
d. Septic tanks - Unknown
e. Known industrial* -
Draper Corporation 2,650 2.7
f. Direct precipitation - 850 0.9
Total 96,600 100.0
2. Outputs -
Lake outlet - Mill River 93,440
3. Net annual N accumulation - 3,160 pounds
* Tennant, l974b.
See Working Paper No. 1.

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14
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary lbs P/mi 2 /yr lbs N/mi 2 /yr
Mill River 62* 2,068
Quick Stream 50 1 ,636
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his “dangerous” rate is the rate at which the
receiving water would become eutrophic or remain eutrophic; his
‘permissible” rate is that which would result in the receiving
water remaining oligotrophic or becoming oligotrophic if mor-
phometry permitted. A mesotrophic rate would be considered one
between “dangerous” and “permissible”.
Total Phosphorus Total Nitrogen
Units Total Accumulated Total Accumulated
lbs/acr /yr 58.0 33.5 1,097.7 35.9
grams/rn /yr 6.50 3.76 123.0 4.0
Volle weider loading rates for phosphorus
(g/m /yr) based on mean depth and mean
hydraulic retention time of Harris Pond:
“Dangerous” (eutrophic rate) 2.30
“Permissible” (oligotrophic rate) 1.15
* Estimated; see Appendix D.

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15
VI. LITERATURE REVIEWED
Anonymous, 1974. Blackstone River, 1973 water quality survey data.
Pubi. No. 6995-175-57-11-73—CR, MA Water Resources Comm.,
Westborough.
Fester, James W., 1974. Personal communication (water supply use
of Harris Pond). RI Divn. Water Supply & Pollution Control,
Providence.
Tennant, Peter A., 1973. Wastewater treatment plant questionnaire
(contributing population and description of Hopedale STP). MA
Divn. Water Pollution Control, Westborough.
___________ 1974a. Personal communication (characteristics, uses,
and trophic condition of Harris Pond). MA Divn. Water Pollution
Control, Westborough.
____________ 1974b. Personal communication (description of Draper
Corp. discharge and nutrient loads). MA Divn. Water Pollution
Control, Westborough.
Vollenweider, Richard A., (in press). Input-output models. Schweiz
A. Hydrol.

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VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA

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TRIBUTARY FLOW INFORMATION FOR MASSACHUSETTS
8/8/74
MONTHLY
MONTH
B
9
10
11
12
1
2
3
4
5
6
6
7
B
9
10
11
2
3
4
S
6
6
7
TOTAL DRAINAGE AREA Of LAKE •
SUM OF SUB—DRAINAGE AREAS .
FLOWS AND DAILY FLOWS
YEAR MEAN FLOW DAY FLOW
72 21.80 30 15.80
72 26.90 24 37.90
72 54.80 14 58.50
72 150.00 S 50.50
72 189.00 2 197.00
73 110.00 7 110.00
73 121.00 3 551.00
73 68.20 11 75,80
73 122.00 7 126.00
73 73.40 9 64.00
73 36.00 -
73 36.00 10 26.10
73 42.30 7 74.00
72 25.20 30 18.20
72 31.00 24 43.70
72 63.30 14 67.50
72 173.00 5 58.30
72 218.00 2 227.00
73 126,00 7 127.00
73 139.00 3 636.00
73 78.10 11 87.40
73 141.00 7 145.00
73 84.50 9 74.50
73 41.40
73 41.40 10 30.10
73 48.90 7 85.50
25 53.10
21 60.00
25 61.20
21 69.20
LAKE CODE 2503 HARRIS POND
TOTAL DRAINAGE AREA OF LAKE
SUB—DRAINAGE
TRIBUTARY AREA JAN
2503A1 28.70 62.60
2503A2 33.10 72.20
250381 2.21 4.80
2503 1Z 2.20 4.80
33.10
FEB
MAR
APR
71.50
103.00
90.70
82.40
118.00
105.00
5.50
7.90
7.00
5.50
7.90
7.00
MAY
JUN JUL
AUG
60.60
69.80
4.70
4.70
33.60 16.50
38.70 19.10
2.60 1.30
2.60 1.30
17.00
19.70
1.30
1.30
SUMMARY
33.10
33.11
TOTAL FLOW
TOTAL FLOW
IN
0U
—
—
694.80
693.70
SEP
OCT
NOV
DEC
MEAN
21.50
24.70
43.60
56.50
50.01
24.80
28.50
50.30
65.20
57.64
1.70
1.90
3.40
4.40
3.86
1.70
1.90
3.40
4.40
3.86
MEAN
TRIBUTARY
2503A1
2503A2
DAY
FLOW DAY
FLOW

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TRIBUTARY FLOW INFORMATION FO MASSACHUSETTS 8/8/74
LAKE CODE 2503 HARRIS PO’ D
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
?503B1 8 7? 1.70 30 1.20
9 72 2.10 24 2.90
10 72 4.20 14 4.50
ii 72 11.70 5 3.90
7? 14.70 2 15.20
1 73 8.40 7 8.50
2 73 9.30 3 42.40
3 73 5.20 11 5.90 25 4.10
4 73 9.40 7 Y.70 21 4.60
5 73 5.70 9 5.00
6 73 2.80
6 73 2.80 10 2.00
7 73 3.30 7 5.70
2503ZZ 8 72 1.70
9 72 2.10
10 7. 4.20
11 7 11.70
1? 7? 14.70
1 73 8.40
2 73 9.30
3 73 5.20
4 73 9.40
5 73 5.70
73 ?.80
7 73 3.30

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APPENDIX B
PHYSICAL and CHEMICAL DATA

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STOPET RETRIEVAL DATE 74/08/09
250301
42 02 00.0 071 30 18.0
HARRIS POND
25 MASSACHUSETTS
1 1EPALES
3
2111202
0005 FEET DEPTH
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
32217
CHLPPHYL
A
‘JG/L
2.5J
47.2J
10.SJ
00010
00300
00077
00094
00400
00410
00630
00610
00665
00666
DATE
TIME
DEPTH
WATER
DO
TRANSP
CNDUCTVY
P 1- I
T
ALK
N02&N03
NH3—N
P1-lOS—TOT
PHOS—OIS
FROM
OF
TEMP
SECCHI
FIELD
CACO3
N—TOTAL
TOTAL
TO
DAY
FEET
CENT
MG /L
INCHES
MICROMMO
SU
MG/L
MG/L
MG/L
MG/I P
MG/I P
72/06/04
13 20 0000
21.4
8.0
40
100
6.30
11
0.120
0.130
0.060
0.002K
72/08/01
18 45 0000
11.6
16
110
8.60
10
0.180
0.120
0.084
0.032
7?/lO/06
16 05 0000
19
143
7.15
17
0.380
0.120
0.073
0.028
16 05 0005
15.1
9.2
135
6.60
17
0.530
0.170
0.085
72/06/04 13 20 0000
72/08/01 18 45 0000
72/10/06 16 05 0000
1< - VALUE RNOWN TO BE LESS
THAN INDICATED
J VALUE KNOWN TO BE IN ERROR

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STORET RETRIEVAL DATE 74/08/09
250302
4? 01 04.0 07) 30 28.0
HARRIS POND
25 MASSACHUSETTS
IIEPALES 2111202
3 0025 FEET DEPTH
00010 00300 00077 00094 00400 00410 00630 00610 00665 00666
DATE TIME DEOTH WATER DO TRANSP CNDUCTVY PH T ALK P I02&NO3 NH3—N PHOS—TOT PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 N—TOTAL TOTAL
TO DAY FEET CENT MG/L INCHES MICROMNO SU MG/L MG/L MG/L MG/L P PIG/L P
72/06/04 13 35 0000 20.2 8.0 90 6.30 12 0.150 0.120 0.034 0.020
13 35 0015 14.7 5.4 100 6.30 13 0.220 0.190 0.026 0.015
13 35 0020 10.4 6.2 100 6.10 13 0.210 0.280 0.015 0.012
72/08/01 18 15 0000 36 105 8.70 10 0.120 0.090 0.052 0.020
18 15 0004 25.7 7.2 110 6.40 10K 0.210 0.170 0.028 0.026
18 15 0008 21.7 2.4 105 6.10 10K 0.120 0.100 0.051 0.024
18 15 0015 16.0 0.4 105 5.90 10K 0.040 1.000 0.103 0.067
18 15 0021 11.3 0.4 105 5.90 10K 0.040 0.980 0.096 0.064
72/10/06 IS 30 0000 18 128 8.65 16 0.150 0.100 0.041 0.015
15 30 0004 17.1 12.0 130 8.60 17 0.160 0.120 0.034 0.013
15 30 0015 15.4 3.4 130 6.25 18 0.180 0.590 0.033 0.020
15 30 0019 14.7 3.3 140 6.30 16 0.360 0.420 0.070 0.023
15 10 0023 11.2 0.0 155 6.35 12 0.070 2.820 0.123 0.076
3??I 7
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/06/04 13 35 0000 1.OJ
72/08/01 18 15 0000 2. SJ
72/10/06 15 30 0000 13.7J
K* VAL(JF rcNOW”I TO P LESS
THAN Ir DICATED
J* V LU P(NOWN TO B IN FR O

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APPENDIX C
TRIBUTARY and WASTEWATER
TREAThENT PLANT DATA

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STORET RETRIEVAL DATE 74/08/OR
2503A1 LS2SO3A1
42 02 30.0 071 31 00.0
MILL RIVER
25 7.5 BLACP(STONE
I/HARRIS POND MA
SUMMER ST BROG W OF E BLACKSTONE MA
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3-N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P MG/L P
72/08/26 10 50 0.590 0.775 0.048 0.138
72/09/24 11 15 0.530 0.750 0.336 0.052 0.140
72/10/14 13 15 0.528 0.700 0.354 0.050 0.120
72/11/05 11 30 0.370 0.550 0.200 0.056 0.126
72/12/02 13 30 0.200 0.440 0.044 0.012 0.034
73/01/07 14 30 0.260 0.350 0.084 0.013 0.030
73/02/03 13 30 0.200 0.500 0.075 0.025 0.095
73/03/11 12 45 0.240 0.500 0.130 0.028 0.060
73/03/25 09 00 0.300 0.340 0.094 0.034 0.055
73/04/07 13 30 0.180 0.660 0.075 0.022 0.045
73/04/21 09 15 0.198 0.630 0.097 0.025 0.070
73/05/09 13 30 0.231 0.630 0.210 0.039 0.080
73/06/10 10 30 0.480 0.480 0.100 0.069 0.135
73/07/07 09 05 0.176 0.780 0.089 0.038 0.080

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STORET RETRIEVAL DATE 74/08/08
2503A2 LS2503A2
42 01 00.0 071 30 30.0
MILL RIVER
25 7.5 BLACKSTONE
0/HARRIS POND MA
ST HWY 114 BRDG IN WOONSOCKET
11EPALES 21112•4
4 0000 FEET DEPTH
00630 Ô0625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/I P MG/L P
72/08/26 10 06 0.072 0.785 0.005K 0.017 0.048
72/09/24 11 05 0.263 0.925 0.093 0.013 0.066
72/10/14 13 00 0.370 1.100 0.370 0.015 0.066
72/11/05 11 17 0.410 0.850 0.240 0.025 0.073
72/12/02 12 30 0.200 0.340 0.048 0.010 0.037
73/01/07 13 20 0.336 0.340 0.054 0.018 0.025
73/02/03 13 20 0.330 0.380 0.120 0.022 0.060
73/03/11 11 40 0.290 0.310 0.078 0.018 0.045
73/03/25 09 15 0.300 0.390 0.060 0.014 0.035
73/04/07 13 15 0.252 0.290 0.044 0.012 0.030
73/04/21 09 15 0.200 0.460 0.013 0.021 0.045
73/05/09 13 00 0.240 0.580 0.052 0.016 0.045
73/06/10 12 12 0.310 0.320 0.066 0.024 0.055
73/07/07 09 15 0.180 0.720 0.066 0.025 0.055
K V LU E KNOWN TO BE LESS
TrIAN IND1CATE t)

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STORET RETRIEVAL DATE 74/08/08
2503A3 LS2503A3
42 07 30.0 071 32 00.0
MILL RIVER
25 7.5 BLACKSTONE
I/HARRIS POND HA
BRDG JUST ABOV HOPEDALE SIP
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3—N PHOS—DIS PHOS-TOT
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/I MG/I P MG/L P
72/08/26 13 28 0.280 0.950 0.069 0.078 0.260
72/09/24 10 35 0.140 0.450 0.198 0.010 0.058
72/11/05 12 09 0.210 0.650 0.252 0.026 0.075
72/12/02 14 00 0.170 0.680 0.140 0.031 0.067
73/01/07 13 30 1.940 0.100K 0.014 0.007 0.010
73/02/03 14 05 0.170 0.250 0.045 0.007 0.030
73/03/11 12 00 0.115 0.290 0.048 0.022 0.025
73/03/25 09 15 0.150 0.350 0.072 0.018 0.045
73/04/07 13 30 0.550 1.150 0.590 0.273 0.375
73/04/22 09 05 0.092 0.370 0.048 0.011 0.035
73/05/09 14 00 0.530 1.210 0.100 0.042 0.183
73/06/10 13 00 0.110 0.140 0.033 0.042 0.210
73/07/07 09 20 0.042 0.520 0.040 0.007 0.025
K V LtJ rENOWN TO r E L Sc
T 4t N I DICATF1)

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STORET RETRIEVAL DATE 74/08/08
2503A4 LS2503A4
42 07 00.0 071 32 00.0
MILL RIVER
25 7.5 BLACKSTONE
T/HARRIS POND
MILL ST BROG BELO HOPEDALE STP
1 1EPALES 21112G4
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT XJEL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P MG/L P
12/08/26 13 12 0.551 2.060 I.000L 0.310 0.660
72/09/24 10 22 0.235 0.800 0.450 0.115 0.200
72/10/14 15 00 0.470 1.850 0.280 0.280 0.490
72/11/05 11 00 0.410 1.180 0.730 0.200 0.353
72/12/02 15 00 0.126 0.290 0.050 0.0051 < 0.025
73/01/07 14 00 1.940 0.1001 < 0.0051< 0.006 0.006
73/02/03 14 15 0.190 0.500 0.105 0.018 0.060
13/03/11 12 30 0.180 0.440 0.160 0.052 0.090
73/Q3/25 09 20 0.231 0.660 0.290 0.100 0.150
13/04/07 14 45 0.490 1.100 0.510 0.240 0.340
73/04/22 09 10 0.105 0.750 0.340 0.060 0.115
73/05/09 14 45 0.540 0.720 0.086 0.036 0.105
73/06/10 13 30 0.102 0.100 1 < 0.020 0.037 0.190
73/07/07 09 15 0.068 0.690 0.170 0.042 0.090
K VMLUE KNOWN TO BE LESS
Tr- AN INDIcATED

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STORET RETRIEVAL DATE 74/08/08
250381 LS2503B1
42 02 30.0 071 30 30.0
QUICK STREAM
25 7.5 BLACKSTONE
1/HARRIS POND MA
ELM ST BRDG SE OF E BLACKSTONE MA
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO2 NO3 TOT KJEL NH3-N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L M6/L MG/I MG/L P MG/L P
72/08/26 11 00 0.169 0.300 0.082 0.006 0.013
72/09/24 11 30 0.156 0.100K 0.044 0.005K 0.012
72/10/14 13 45 0.123 0.200 0.057 0.005K 0.005
72/11/05 11 50 0.156 0.200 0.066 0.00 5K 0.007
72/12/02 12 00 0.189 0.180 0.013 0.005K 0.015
73/01/07 13 45 0.260 0.630 0.024 0.010 0.010
73/02/03 14 00 0.220 0.190 0.060 0.006 0.020
73/03/11 12 15 0.170 0.420 0.028 0.010 0.015
73/03/25 09 30 0.170 0.160 0.027 0.007 0.010
73/04/07 14 00 0.126 0.350 0.021 0.011 0.020
73/04/21 09 30 0.120 0.210 0.019 0.005K 0.020
73/05/09 14 00 0.140 0.360 0.052 0.006 0.020
73/06/10 10 45 0.170 0.840 0.072 0.010 0.020
73/07/07 09 15 0.126 0.260 0.048 0.007 0.015
K Vi LUF t NOWN TO BE LrSS
T’-I N P D1C TFL)

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STORET RETRIEVAL DATE 74/08/08
2503C1 LS2503C1
42 02 30.0 071 31 30.0
HOP BROOK
25 7.5 BLACKSTONE
1/HARRIS POND MA
FARM ST BRDG WNW OF E BLACKSTONE
11EPALES 2111204
0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3-N PHOS—DIS PHOS—TOT
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/I P MG/L P
72/08/26 10 35 0.455 1.050 0.180 0.009 0.036
72/09/24 11 20 0.169 0.350 0.154 0.012 0.022
72/10/14 13 15 0.093 0.500 0.138 0.005K 0.012
72/11/05 11 45 0.042 0.300 0.061 0.006 0.011
72/12/02 12 50 0.016 0.440 0.015 0.005K 0.012
73/01/07 13 35 0.032 0.200 0.022 0.006 0.006
73/02/03 13 35 0.025 0.250 0.017 0.005K 0.010
73/03/11 12 05 0.025 0.350 0.023 0.008 0.015
73/03/25 09 25 0.028 0.170 0.013 0.005 0.005
73/04/07 13 30 0.010K 0.170 0.007 0.005K 0.010
73/04/21 09 30 0.025 0.290 0.019 0.009 0.010
73/05/09 13 15 0.036 0.600 0.063 0.005K 0.015
73/96/10 12 25 0.050 0.560 0.073 0.009 0.030
73/07/07 09 30 0.038 0.655 0.032 0.007 0.015
K VALUE KNOWN TO BE LESS
THAN INDICATED

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STORET RETRIEVAL DATE 74/08/08
250301 LS2 SO3D I
42 05 30.0 071 32 00.0
SPRING BROOK
25 7.5 BLACKSTONE
T/HARRIS POND MA
PROVIDENCE ST BROG SSE OF MENDON MA
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH NO2F.N03 TOT KJEL NH3-N PHOS—DIS PHOS-TOT
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/I MG/L P MG/L P
7?/Q8/26 12 45 0.156 0.400 0.012 0.005K 0.012
72/09/24 10 10 0.100 2.650 0.430 0.032 0.063
72/10/14 12 40 0.022 0.400 0.084 0.005K 0.010
72/11/05 12 45 0.036 0.350 0.076 0.006 0.009
72/12/02 13 35 0.083 0.380 0.020 0.010 0.011
73/01/07 13 30 0.115 0.560 0.018 0.005K 0.005K
73/02/03 13 05 0.110 0.280 0.007 0.005K 0.015
73/03/11 13 15 0.046 0.920 0.072 0.008 0.015
73/03/25 09 22 0.018 0.150 0.015 0.005K 0.005K
73/04/07 13 40 0.010K 0.140 0.007 0.005K 0.005K
73/04/21 09 45 0.010K 0.300 0.019 0.005K 0.005K
73/05/09 13 30 0.040 0.280 0.017 0.005K 0.015
73/06/10 10 00 0.054 0.700 0.084 0.008 0.025
73/07/07 09 15 0.046 0.840 0.072 0.006 0.010
K V LU r’NOW’I 10 .lt. LESS
Tr-U N T iI)TCATF)

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STORET RETRIEVAL DATE 74/08/08
2503E1 LS2503E1
42 05 30.0 071 32 00.0
MUDDY BROOK
25 7.5 BLACKSTONE
1/HARRIS POND
HARTFORD AVE BRDG SE OF MENDON
11EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3-N PHOS—DIS PHOS-TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/I P MG/I P
72/08/26 12 55 0.471 0.400 0.022 0.010 0.029
72/09/24 10 00 0.098 0.200 0.052 0.006 0.023
72/10/14 12 50 0.234 0.375 0.084 0.005K 0.022
72/11/05 12 50 0.290 0.250 0.063 0.007 0.018
72/12/02 13 40 0.360 0.340 0.008 0.013 0.022
73/01/07 13 35 0.410 0.540 0.027 0.007 0.010
73/02/03 13 10 0.300 0.440 0.028 0.010 0.035
73/93/11 13 25 0.450 1.400 0.115 0.014 0.030
73/03/25 09 26 0.390 0.270 0.028 0.007 0.010
73/94/07 14 05 0.290 0.320 0.029 0.007 0.010
73/94/21 09 50 0.250 0.315 0.031 0.009 0.020
73/05/09 13 35 0.420 0.560 0.060 0.015 0.060
73/06/10 10 05 0.310 0.400 0.075 0.009 0.040
73/07/07 09 20 0.260 0.700 0.063 0.011 0.020
K VALUE KNOWN TO 3E LESS
THAN INDICATED

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APPENDIX D
HOPEDALE and DRAPER CORP.
PHOSPHORUS LOADS

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During the sampling year, the phosphorus load measured in the Mill
River at station A-4 (flow adjusted) was 12,990 ibs, or over 4,000 lbs
more than the 8,270 lb load measured at the Harris Pond inlet station
(A—l; see map, page ‘v). This loss is attributed to sedimentation and/or
biological assimilation in the intervening seven or so miles of the Mill
River.
Because of this loss, it was necessary to calculate point and non-
point phosphorus contributions indirectly, and the following rationale
was used to estimate the phosphorus loads reaching Harris Pond:
1. The mean of the total phosphorus concentrations in Quick
Stream (B-l), Hop Brook (C-i), Spring Brook (0-1), and Muddy
Brook (E-l) = 0.018 mg/l during the sampling year (as far as
is known, none of these streams receives point-source nutrients
and thus are believed to be representative of Mill River
drainage non-point nutrient contributions).
2. Using the mean Mill River flow at A-i (50.0 cfs) and the
mean total phosphorus concentration in the above streams, the
calculated non-point load in the Mill River at A-l = 1 ,770 lbs
P/yr.
3. The phosphorus load measured at A-l = 8,270 lbs minus the
1,770 lbs non-point load = 6,500 lbs P/yr due to the two point
sources.
4. The total point—source load at the point of discharge =
6,230 lbs (Hopedale) plus 1,280 1bs( raper Corp.*) = 7,510
lbs P/yr.
5. Then the portion of the Hopedale load reaching the Pond
= 6,230/7,510 X 6,500 = 5,390 lbs P/yr (rounded).
6. And the portion of the Draper Corp. load reaching the
Pond = 1,280/7,510 X 6,500 = 1,110 lbs P/yr (rounded).
* Tennant, l974b.

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