U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT ON
NORTHBORO, HUDSON, HAYNARD,
AND BILLERICA ttPOUfOTNTS
WORCESTER AND MIEDLfSEX COUNTIES
MASSACHUSETTS
EPA REGION I
WORKING PAPER No, 219
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
ttGPO 697-032
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/» REPORT ON
V NORTHBORO, HUDSON, MAYNARD,
r& AND BILLERICA IMPOUNDMENTS
WORCESTER AND MIDDLESEX COUNTIES
^ MASSACHUSETTS
EPA REGION I
WORKING PAPER No, 219
WITH THE COOPERATION OF THE
MASSACHUSETTS DIVISION OF WATER POLLUTION CONTROL
AND THE
MASSACHUSETTS NATIONAL GUARD
APRIL, 1975
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CONTENTS
Page
Foreword ii
List of Massachusetts Study Lakes iv
Lake and Drainage Area Maps v, vi, vii, viii
Sections
I. Conclusions 1
II. Introduction 5
III. Lake and Drainage Basin Characteristics 6
IV. Lake Water Quality Summary . 10
V. Nutrient Loadings 20
VI. Literature Reviewed 34
VII. Appendices 35
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n
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophi.cation 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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m
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 Massachusetts Division of
Water Pollution Control for professional involvement and to the
Massachusetts National Guard for conducting the tributary sampling
phase of the Survey.
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 invaluable lake documentation
and counsel during the course of the Survey.
Major General Vahan Vartanian, the Adjutant General of Massa-
chusetts, and Project Officer Major William Flaherty, who directed
the volunteer efforts of the Massachusetts National Guardsmen, are
also gratefully acknowledged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF MASSACHUSETTS
LAKE NAME
COUNTY
Assabet-Concord River Impoundments
Northboro
Hudson
• Maynard
Bill erica
Hager Pond
Matfield Impoundment
Rochdale Pond
Woods Pond
Worcester
Middlesex
Middlesex
Middlesex
Middlesex
Plymouth
Worcester
Berkshire
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Northboro
Impoundment
NORTHBORO
IMPOUNDMENT
X Lake Sampling Site
Tributary Sampling Site
• Seuage Treatment
Facility
Map Location
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r\
/ H-/
Browrn- CornerVy
'
HUDSON IMPOUNDMENT
X Lake SampHnq Site
® Tributary Sampling Site
Direct Drainage Area Limits
Sewage Treatment Facility
1/21 2
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MAYNARD IMPOUNDMENT
®Tributary.Sampling Site X Lake Sampling Site
Sewage Treatment facility
D v£ 1 ?'Mi
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viii
BILLERICA IMPOUNDMENT
X Lake Sampling Site
Tributary Sampling Site
• Seuage Treatment Facility
Map Location
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NORTHBORO, HUDSON, MAYNARD, and BILLERICA IMPOUNDMENTS
STORE! NOS. 2512, 2513, 2504, and 2511
I. CONCLUSIONS
A. Trophic Condition:
The impoundments of the Assabet-Concord River system
were quite eutrophic having excessive nutrient levels, high
chlorophyll a_ values, and heavy growths of aquatic macro-
phytes. Phytoplankton genera identified generally were
pollution-tolerant forms. Dissolved oxygen concentrations
were depressed in the three Assabet River impoundments. The
algal assay control yields in samples from the Maynard and
Hudson impoundments were extremely high; respectively, three
and five times the high yield obtained with the Billerica
sample (nutrient levels measured indicate that Northboro
Impoundment also had a high primary productivity).
B. Rate-Limiting Nutrient:
Nitrogen was the limiting nutrient in the three impound-
ments of the Assabet River and also in Billerica Impoundment
(Concord River) during the autumn sampling, 1972. The impound-
ment data indicate nitrogen limitation in all of the impound-
ments at the other sampling times as well.
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C. Nutrient Controllability:
1. Point sources—During the sampling year, the total
phosphorus loading rates of all of the impoundments were
far higher than the rates proposed by Vollenweider (in
press) as "dangerous"; i.e., eutrophic rates (see page 33).
However, Vollenweider's model probably is not applica-
ble to water bodies with short hydraulic retention times.
The mean hydraulic retention times of the impoundments are
very short, ranging from four hours (Billerica) to 23 hours
(Maynard), and it is unlikely that the model applies.
Nonetheless, the existing trophic condition of the impound-
ments is evidence of excessive nutrient loads.
In the following table are shown the existing phosphorus
loading rates, the portion of the phosphorus loads attributed
to point sources, the loading rates that would result with
100% phosphorus control at the point sources, and how the new
loading rates would compare to the eutrophic rate:
Existing % point- Rate w/
rate source 100% control Exceeds eutrophic
Impoundment (g/nr/yr) load (g/m^/yr) rate by factor of
Northboro
Hudson
Maynard
Billerica
402
249
99
716
82.5
83.3
91.9
60.5
70
42
8
283
14 X
8 X
2 X
23 X
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While point-source phosphorus control at Shrewsbury and
Westboro would not be expected to result in a significant
improvement in the trophic condition of Northboro Impoundment,
it is likely that a high degree of control at these sources
and all of the downstream point sources would result in
appreciable improvement in the trophic condition of Hudson
and Maynard impoundments and probably Bill erica Impoundment
as well, providing the Sudbury River phosphorus load to the
latter can be similarly reduced (note that if the estimated
Sudbury River phosphorus load is subtracted, point-source
loads constitute 87.8% of the total.phosphorus load to
Billerica Impoundment).
It is noted that apparent loss of nitrogen occurred in
every one of the impoundments during the sampling year. Such
apparent loss is not uncommon in water bodies with very short
hydraulic retention times; but, in these waters, the loss
may have resulted from resolubilization of nitrogen from bottom
sediments as suggested by Blanc and O'Shaughnessy (1974).
2. Non-point sources (see page 32)--The phosphorus export
rate of the Assabet River above Northboro Impoundment was
unaccountably high during the sampling year. While the export
rate shown is based on the phosphorus load measured at inlet
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station A-2 (see map, page v) minus the upstream point-
source loads, almost exactly the same export rate results
when the mean phosphorus concentrations at station A-5
(13 samples = 0.134 mg/1) and the mean flow at station A-2
are used to calculate the non-point load.
The export rates of the Concord River at station A-2
(see map, page viii) and Taylor Brook, a tributary of
Maynard Impoundment (see map, page-vii) also markedly
exceeded the export rates of Cold Harbor and Assabet brooks
p
(mean = 92 Ibs/mi /yr). While an unknown portion of the
Concord River phosphorus export can be attributed to the
phosphorus contribution of the Sudbury River, the high
Taylor Brook export rate may be due to urban drainage in
the Maynard vicinity.
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II. INTRODUCTION
Several small impoundments of the Assabet-Concord River system
were sampled during 1972. The impoundments are located at Northboro,
Hudson, and Maynard, on the Assabet River, and at Bill erica on the
Concord River. The effluents of nine municipal or institutional
wastewater treatment plants impact the river system from the head-
waters of the Assabet River near Grafton to Billerica, below Concord,
a reach of approximately 40 miles. Maynard Impoundment is located
9.0 to 11.0 miles; the Hudson Impoundment, 18.2 to 19.6 miles; and
the Northboro Impoundment, 25.4 to 25.7 miles upstream from the
confluence of the Assabet River with the Sudbury River forming the
Concord River.
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III. LAKE AND DRAINAGE BASIN CHARACTERISTICS
(See Appendix A for flow data)
A. Northboro Impoundment -
1. Lake Morphometry:
a. Surface area: 15 acres.
b. Mean depth: 4 feet.
c. Maximum depth: 5 feet.
d. Volume: 60 acre-feet.
e. Mean hydraulic retention times: 13 hours.
2. Tributary and Outlet
a. Tributaries -
Name Drainage area* Mean flow*
Assabet River 20.3 mi2, 30.9 cfs
Cold Harbor Brook 9.7 mi 14.8 cfs
Minor tributaries & 2
immediate drainage - 5.4 mi 8.2 cfs
Totals 35.4 mi2 53.9 cfs
b. Outlet -
Assabet River 35.4 mi2 53.9 cfs
3. Precipitation**:
a. Year of sampling: 71.7 inches.
b. Mean annual: 45.4 inches.
* Drainage areas are accurate within ±1%; gaged mean daily, monthly, and
normalized monthly flows are accurate within ±15%; and ungaged mean
daily, monthly, and normalized flows are accurate within ±20%.
** See Working Paper No. 1, "Survey Methods, 1972".
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B. Hudson Impoundment -
1. Lake Morphometry:
a. Surface area: 30 acres.
b. Mean depth: 4 feet.
c. Maximum depth: 6 feet.
d. Volume: 120 acre-feet.
e. Mean hydraulic retention time: 13 hours.
2. Tributary and Outlet:
a. Tributaries -
Name Drainage area Mean flow
Assabet River - - . 50.6 mi2 92.3 cfs
Minor tributaries & 2
immediate drainage - 12.1 mi 18.4 cfs
Totals 72.7 mi2 110.7 cfs
b. Outlet -
Assabet River 72.7 mi2 110.7 cfs
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8
C. Maynard Impoundment -
1. Lake Morphometry:
a. Surface area: 80 acres.
b. Mean depth: 4 feet
c. Maximum depth: 5 feet.
d. Volume: 320 acre-feet.
e. Mean hydraulic retention time: 23 hours.
2. Tributary and Outlet:
a. Tributaries -
Name Drainage area Mean flow
Assabet River 77.1 mi~ 117.3 cfs
Assabet Brook 19.9 mi~ 30.3 cfs
Taylor Brook 4.6 mi 7.0 cfs
Minor tributaries & 2
immediate drainage - 11.4 mi 17.3 cfs
Totals . 113.0 mi2 171.9 cfs
b. Outlet -
Assabet River 113.0 mi2 171.9 cfs
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D. Billerica Impoundment -
1. Lake Morphometry:
a. Surface area: 25 acres.
b. Mean depth: 7 feet.
c. Maximum depth: 10 feet.
d. Volume: 175 acre-feet.
e. Mean hydraulic retention time: 4 hours.
2. Tributary and Outlet:
a. Tributaries -
Name Drainage area Mean flow
Concord River 250.0 mi2 504.3 cfs
Minor tributaries & 2
immediate drainage - 26.0 mi 37.4 cfs
Totals 276.0 mi2 541.7 cfs
b. Outlet -
2
Concord River 276.0 mi 541.7 cfs
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10
IV. LAKE WATER QUALITY SUMMARY
The Assabet-Concord River Impoundments were sampled three times
during the open-water season of 1972 by means of a pontoon-equipped
Huey helicopter, except for Northboro which was only sampled once.
Near-surface samples were collected for physical, chemical, and
biological parameters in the Assabet impoundments, and additional
depths were sampled in Bill erica Impoundment where greater depth
permitted (see maps, pages v, vi, vii, and viii). During the last
visit, a single five-gallon sample was collected for algal assays
(except Northboro).
The results obtained are presented in full in Appendix B, and
the data for the fall sampling period are summarized below (the
Northboro data are for the late spring sampling period). Note,
however, the Secchi disc summaries are based on all values.
For differences in the various parameters at the other sampling
times, refer to Appendix B.
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11
A. Physical and chemical characteristics:
1. Northboro Impoundment -
Spring Values
(06/03/72)
Parameter Single Sub-Surface Sample
Temperature (Cent.) 16.4
Dissolved oxygen (mg/1) 6.3
Conductivity (ymhos) 20
pH (units) 6.5
Alkalinity (mg/1) <10
Total P (mg/1) 0.275
Dissolved P (mg/1) 0.212
N02 + NOs (mg/1) 0.350
Ammonia (mg/1) . 0.250
All Values
Secchi disc (inches) 42
2. Hudson Impoundment -
Fall Values
(10/06/72)
Parameter Minimum Mean Median Maximum
Temperature 14.9 14.9 14.9 14.9
Dissolved oxygen 7.6 7.6 7.6 7.6
Conductivity 250 253 253 255
pH 6.4 6.5 6.5 6.5
Alkalinity 18 19 19 20
Total P 1.170 1.200 1.200 1.230
Dissolved P 1.160 1.195 1.195 1.230
N02 + N03 1.760 1.810 1.810 1.860
Ammonia 0.080 0.085 0.085 0.090
All Values
Secchi disc 42 53 58 60
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12
3. Maynard Impoundment -
Parameter
Temperature
Dissolved oxygen
Conductivity
PH
Alkalinity
Total P
Dissolved P
N02 + N03
Ammonia
Secchi disc
Fall Values
(10/06/72)
Minimum Mean
AH Values
36
Median
Maximum
14.6
6.2
200
6.4
12
0.417
0.356
0.420
0.100
14.7
6.2
221
6.4
21
0.585
0.481
0.980
0.125
14.7
6.2
223
6.4
23
0.552
0.488
1.100
0.125
14.8
6.2
240
6.4
25
0.820
0.590
1.300
0.150
52
58
72
4. Bill erica Impoundment -
Fall Values
Parameter
Temperature
Dissolved oxygen
Conductivity
PH
Alkalinity
Total P
Dissolved P
N02 + N03
Ammonia
(10/06/72)
Minimum Mean
Medi an
Maximum
16.5
9.0
210
7.0
23
0.151
0.063
0.290
0.070
16.7
9.8
213
7.5
25
0.155
0.071
0.313
0.080
16.7
9.8
215
7.3
23
0.155
0.071
0.320
0..070
16.9
10.6
215 .
8.2
28
0.158
0.078
0.330
0.100
All Values
Secchi disc
32
40
40
48
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13
B. Biological characteristics:
1
Northboro Impoundment -
Phytoplankton -
a.
Sampling
Date
06/03/72
Dominant
Genera
1. Cyclotella '
2. Fragilaria
3. Melosira
4. Navicula
5. Cocconeis
Other genera
Total
Number
per ml
9,699
4,436
3,684
1,654
1,654
3,911
25,038
b. Chlorophyll a_ -
(Because of instrumentation problems during the 1972
sampling, chlorophyll <^ values may be in error by plus
or minus 20 percent.)
Not done at Northboro Impoundment
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14
2. Hudson Impoundment
a. Phytoplankton*
Sampl i ng
Date
08/04/72
Dominant
Genera
1.
2.
3.
4.
5.
Cyclotella
Synedra
Navicula
Scenedesmus
Cocconeis
Other genera
Number
per ml
38
33
20
18
16
81
10/06/72
Total
1. Flagellates
2. Microcystis
3. Cryptomonas
4. Anabaena
5. Fragilaria
Other genera
Total
b. Chlorophyll a_ -
206
294
279
136
136
83
617
1,545
Sampling
Date
06/02/72
08/04/72
10/06/72
Station
Number
01
01
01
Chlorophyll a
(yg/1 )
2.5
1.3
2.9
* The June sample was lost in shipment.
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15
3. Maynard Impoundment
a. Phytoplankton* -
Sampling
Date
08/04/72
10/06/72
b. Chlorophyll
Sampling
Date
06/02/72
08/04/72
10/06/72
Dominant
Genera
1. Fragilaria
2. Cyclotella
3. Cocconeis
4. Navicula
5. Melosira
Other genera
Total
1. Flagellates
2. Cryptomonas
3. Synedra
4. Cyclotella
5. Navicula
Other genera
Total
Station
Number
01
01
01
02
Number
per ml
7,477
2,252
1,441
1,441
1,171
5,317
19,099
844
136
106
90
90
445
1,711
Chlorophyll
(yg/1)
2.2
41.5
7.1
5.8
* The June sample was lost in shipment.
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16
4.
Bill erica Impoundment -
Phytoplankton -
a.
Sampling
Date
06/08/72
Dominant
Genera
1.
2.
3.
4.
5.
Cryptomonas
Microcystis
Synedra
Melosira
Dinobryon
Other genera
Number
per ml
162
141
112
76
50
218
08/04/72
10/06/72
b. Chlorophyll a^ -
Sampling
Date
06/08/72
08/04/72
10/06/72
Total
1. Chroococcus
2. Dinobryon
3. Melosira
4. Schroederia
5. Scenedesmus
Other genera
Total
1. Stichococcus
2. Flagellates
3. Scenedesmus
4. Fragilaria
5. Melosira
Other genera
Total
Station
Number
01
01
01
759
1,285
321
281
281
251
774
3,193
32,406
451
451
301
301
1,654
35,564
Chlorophyll
(yg/1)
0.9
17.5
18.3
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17
C. Limiting Nutrient Study:
1. Northboro Impoundment -
Northboro Impoundment was sampled once in June, 1972,
and no assay sample was collected. However, the sampling
data indicate nitrogen limitation in June (the N/P ratio
was 2/1, and nitrogen limitation would be expected). Also,
the levels of phosphorus and nitrogen measured indicate a
high level of potential primary productivity.
2. Hudson Impoundment -
a. Autoclaved, filtered, and nutrient-spiked -
Ortho P . Inorganic N Maximum yield
Spike (rng/1) Cone, (mg/1) Cone, (mg/1) (mg/l-dry wt.)
Control
0.006 P
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
b. Discussion -
The control yield of the assay alga, Selenastrum
capricornutum, indicates that the potential primary
productivity of Hudson Impoundment was very high at
the time the sample was taken (10/06/72). Also, the
lack of yield response to increased levels of ortho-
phosphorus, and the marked response when only nitrogen
was added, indicate nitrogen limitation at that time.
0.960
0.966
0.972
0.984
1.020
1.020
0.960
1.940
1.940
1.940
1.940
1.940
11.940
11.940
69.4
69.7
70.8
68.1
67.4
267.6
254.4
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18
The sampling data indicate nitrogen limitation at
the other sampling times as well; the N/P ratio was
3/1 in June and in August.
3. Maynard Impoundment -
a. Autoclaved, filtered, and nutrient-spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/l-dry wt.)
Control
0.006 P
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
b. Discussion -
The control yield indicates that the potential pri-
mary productivity of Maynard Impoundment was very high
at the time the sample was collected (10/06/72). Also,
the lack of yield response to increased levels of ortho-
phosphorus, and the marked response when only nitrogen
was added, indicate nitrogen limitation at that time.
The sampling data indicate nitrogen limitation at
the other sampling times as well; the N/P ratios were
2/1 and 8/1 in June and August, respectively.
0.470
0.476
0.482
0.494
0.530
0.530
0.470
1.147
1.147
1.147
1.147
1.147
11.147
11.147
41.6
43.2
43.2
41.6
42.4
317.0
275.5
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0.120
0.126
0.132
0.144
0.180
0.180
0.120
0.520
0.520
0.520
0.520
0.520
10.520
10.520
13.1
14.3
14.1
14.0
15.1
79.1
50.3
19
4. Bill erica Impoundment -
a. Autoclaved, filtered, and nutrient-spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/l-dry wt.)
Control
0.006 P
0.012 P
0.024 P
0.060 P
0.060 P + 10.0 N
10.0 N
b. Discussion -
The control yield indicates the potential primary
productivity of Bill erica Impoundment was quite high at
the time the sample was taken (10/06/72). Also, the
lack of yield response to increased levels of ortho-
phosphorus, and the marked response when only nitrogen
was added, indicate nitrogen limitation at that time.
The sampling data indicate nitrogen limitation at
the other sampling times as well; the N/P ratios were
3/1 and 2/1 in June and August, respectively.
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20
V. NUTRIENT LOADINGS
(See Appendix C for data)
For the determination of nutrient loadings, the Massachusetts
National Guard collected monthly near-surface grab samples from each
of the tributary sites indicated on the maps (pages v, vi, vii, and
viii), except for the high runoff months of March and April when two
samples were collected at many of the stations. Sampling was begun
in September, 1972, and was completed in August, 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 deter-
mined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings*.
Nutrient loadings for unsampled "minor tributaries and immediate
drainage" of Northboro and Hudson impoundments ("ZZ" of U.S.G.S.) were
2
estimated using the nutrient loads, in Ibs/mi /year, in Cold Harbor
2
Brook at station 12B-1 and multiplying the means by the ZZ area in mi .
The ZZ loads of Maynard and Billerica impoundments were similarly esti-
mated using the nutrient loads in Assabet Brook at station 04C-1.
* See Working Paper No. 1.
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21
The non-point nutrient loads in the Assabet River at Northboro
were determined by using the inlet loads at station 12A-2 minus the
upstream point-source loads; the Assabet River non-point loads at
Hudson were determined by using the inlet loads at station 13A-1
minus all upstream point-source loads; the Assabet non-point loads
at Maynard were determined by using the outlet loads of Hudson
Impoundment at station 13A-2 minus all upstream point-source loads
(the Maynard inlet station, 04A-3, was sampled only four times, and
loads derived from the limited data were obviously too low).
The non-point nutrient loads in the Concord River at Bill erica
Impoundment were calculated using the inlet loads at station 11A-1
minus all upstream point-source loads. Note that the Concord River
non-point loads include the nutrient loads contributed by the Sudbury
River for which flow data were not provided, though the stream was
sampled at station 11B-1. However, estimates of the Sudbury River
loads were made by subtracting the sum of the Assabet River loads at
the outlet of Maynard Impoundment (station 04A-T) and the intervening
point-source loads of the City of Maynard and the Concord Reformatory
from the Concord River inlet loads measured at station 11A-1. The
estimated loads derived in this way are shown in parentheses in the
Billerica Impoundment nutrient loadings tables (pages 27 and 31).
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22
The operators of the Westboro, Maynard, Marlboro Westerly, and
Bill erica House of Correction wastewater treatment plants provided
monthly effluent samples and corresponding flow data. The operator
of the Concord Reformatory plant provided effluent samples but no
flow data. Nutrient loads from this source were determined using
mean daily flow estimates provided by the Massachusetts Division of
Water Pollution Control (Hogan, 1975).
A. Waste Sources :
1. Northboro Impoundment -
a. Known municipal -
Name
Westboro
Shrewsbury
Pop.
Served
5,000
9,000
Treatment
ext. aer. +
sand fltrs.
trickling
filter
Mean Flow
(mgd)
0.779
1.711
b. Industrial - Unknown
2. Hudson Impoundment -
a. Known municipal -
Name
Pop.
Served
Treatment
15,000 act. sludge
Marlboro
Westerly
Indirect Sources:
Westboro
Shrewsbury
b. Industrial - Unknown
Mean Flow
(mgd)
1.238
Receiving
Water
Assabet River
Assabet River
Receiving
Water
Assabet River
t Cady, 1973; Hogan, 1975.
-------
23
3.. Maynard Impoundment -
a. Known municipal -
Name
Hudson
Pop.
Served
10,000
Indirect Sources:
Westboro
Shrewsbury
Marlboro Westerly
b. Industrial - Unknown
Treatment
trickling
filter
Mean Flow
(mgd)
1.301
Receiving
Water
Assabet River
4. Bill erica Impoundment -
a. Known municipal -
Pop.
Name Served
Maynard 8,500
Concord 1 ,000
Reformatory
Concord 5,000
Municipal
Bill erica 500
House of Corr.
Indirect Sources :
Westboro
Shrewsbury
Marlboro Westerly
Hudson
Treatment
trickling
filter
int. sand
filters
int. sand
f i 1 ters
trickling
filter
Mean Flow
(mgd)
0.800
0.120
0.873
0.069
Receiving
Water
Assabet River
Assabet River
Concord River
Unnamed trib. to
Bill erica Imp.
b. Industrial - Unknown
-------
24
B. Annual Total Phosphorus Loading - Average Year:
1. Northboro Impoundment -
a. Inputs -
Ibs P/ % of
Source yr total
1) Tributaries (non-point load) -
Assabet River 8,100 15.1
Cold Harbor Brook 840 1.6
2) Minor tributaries & immediate
drainage (non-point load) - 470 0.9
3) Known municipal STP's -
Westboro 11,580 21.5
Shrewsbury 32,780 60.9
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation* - 1_0 <0.1
Total 53,780 100.0
b. Outputs -
Lake outlet - Assabet River 53,610
c. Net annual P accumulation - 170 pounds
* See Working Paper No. 1.
-------
25
2. Hudson Impoundment -
a. Inputs -
IDS P/ % of
Source yj; total
1) Tributaries (non-point load) -
Assabet River 10,050 15.1
2) Minor tributaries & immediate
drainage (non-point load) - 1,050 ' 1.6
3) Known municipal STP's -
Marlboro Westerly 11,240 16.9
Westboro* 11,530 17.3
Shrewsbury* 32,650 49.1
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation** - 1_0_ <0.1
Total 66,530 100.0
b. Outputs -
Lake outlet - Assabet River 52,000
c. Net annual P accumulation - 14,530 pounds
* Indirect source; adjusted for retention in Northboro Impoundment.
** See Working Paper No. 1.
-------
26
3. Maynard Impoundment -
a. Inputs -
Ibs P/ % of
Source yj; total
1) Tributaries (non-point load) -
Assabet River 1,760 2.5
Assabet Brook 1,920 2.7
Taylor Brook 920 1.3
2) Minor tributaries & immediate
drainage (non-point load) - 1,090 1.5
3) Known municipal STP's -
Hudson 24,830 35.1
Marlboro Westerly* 8,790 12.4
Westboro* 9,020 12.8
Shrewsbury* 22,270 31.5 >
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation** - 10. <0.1
Total 70,650 100.0
b. Outputs -
Lake outlet - Assabet River 75,750
c. Net annual P loss - 5,100 pounds
* Indirect source; adjusted for retention in upstream impoundments.
** See Working Paper No. 1.
-------
27
4. Bill erica Impoundment -
a. Inputs -
Ibs P/ % of
Source yr total
1) Tributaries (non-point load) -
Concord River 60,600 38.0
(Sudbury River 49,760*)
2) Minor tributaries & immediate
drainage (non-point load) - 2,510 1.6
3) Known municipal STP's -
Maynard 16,340 10.2
Concord Reformatory 1,600 1.0
Concord Municipal 12,550 7.9
Billerica House Corr. 1,150 0.7
Westboro** 9,020 5.6
Shrewsbury** 22,270 13.9
Marlboro Westerly** 8,790 5.5
Hudson** 24,830 15-. 6
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation*** - lp_ <0.1
Total 159,670 100.0
b. Outputs -
Lake outlet - Concord River 156,790
c. Net annual P accumulation - 2,880 pounds
*~ Estimated (see page 21)'.
** Indirect source; adjusted for retention in upstream impoundments.
*** See Working Paper No. 1.
-------
28
C. Annual Total Nitrogen Loading - Average Year:
1. Northboro Impoundment -
a. Inputs -
Ibs N/ % of
Source yr total
1) Tributaries (non-point load) -
Assabet River 93,420 41.1
Cold Harbor Brook 41,950 15.6
2) Minor tributaries & immediate
drainage (non-point load) - 23,360 8.7
3) Known municipal STP's -
Westboro 19,450 7.2
Shrewsbury . 73,720 27.4
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation* - 140 <0.1
Total 252,040 100.0
b. Outputs -
Lake outlet - Assabet River 271,430
c. Net annual N loss - 19,390 pounds
* See Working Paper No. 1.
-------
29
2. Hudson Impoundment -
a. Inputs -
Ibs N/ % of
Source yr total
1) Tributaries (non-point load) -
Assabet River 284,150 66.3
2) Minor tributaries & immediate
drainage (non-point load) - 23,360 5.4
3) Known municipal STP's -
Marlboro Westerly 27,840 6.5
Westboro* 19,450 4.5
Shrewsbury* 73,720 17.2
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation** - 280 0.1
Total 428,800 100.0
b. Outputs -
Lake outlet - Assabet River 482,840
c. Net annual N loss - 54,040 pounds
* Indirect source; no retention in Northboro Impoundment.
** See Working Paper No. 1.
-------
30
3. Maynard Impoundment -
a. Inputs -
Ibs N/ % of
Source yr total
1) Tributaries (non-point load) -
Assabet River 292,760 43.8
Assabet Brook 104,750 15.7
Taylor Brook 18,670 2.8
2) Minor tributaries & immediate
drainage (non-point load) -. 60,010 9.0
3) Known municipal STP's -
Hudson 69,070 10.4
Marlboro Westerly* 27,840 4.2
Westboro* 19,450 2.9
Shrewsbury* 73,720 11.1
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation** - 770 0.1
Total 667,040 100.0
b. Outputs -
Lake outlet - Assabet River 728,670
c. Net annual N loss - 61,630 pounds
* Indirect source; no retention in upstream impoundments.
** See Working Paper No. 1.
-------
31
4. Bill erica Impoundment -
a. Inputs -
Ibs N/ % of
Source yjr total
1) Tributaries (non-point load) -
Concord River 1,686,620 79.4
(Sudbury River 1,148,030*)
.2) Minor tributaries & immediate
drainage (non-point load) - 136,860 6.4
3) Known municipal STP's -
Maynard 74,520 3.5
Concord Reformatory 8,310 0.4
Concord Municipal 26,120 1.2
Billerica House of Corr. 2,710 0.1
Westboro** 19,450 0.9
Shrewsbury** 73,720 3.5
Marlboro Westerly** 27,840 1.3
Hudson** 69,070 3.2
4) Septic tanks - Unknown ?
5) Industrial - Unknown ?
6) Direct precipitation*** - 240 <0.1
Total 2,125,460 100.0
b. Outputs -
Lake outlet - Concord River 2,335,060
c. Net annual N loss - 209,600 pounds
* Estimated '(see page 21).
** Indirect source; no retention in upstream impoundments.
*** See Working Paper No. 1.
-------
32
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
2 2
Tributary Ibs P/nri /yr Ibs N/mi /yr
Assabet River (above Northboro Imp.) 399 4,602
Cold Harbor Brook 87 4,325
Taylor Brook . 200 4,059
Assabet Brook 96 5,264
Concord River 242 6,746
-------
33
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 morphometry permitted. A mesotrophic rate would be consid-
ered one between "dangerous" and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with very short hydraulic retention times.
Total Phosphorus Total Nitrogen
Northboro
Hudson
Maynard
Bill erica
1 bs/acre/y r
3,585
2,118
1,883
6,387
2
g/m /yr
402
249
99
716
Ibs/acre/yr
16,803
14,293
8,338
85,018
2
g/m /yr
1,883
1,502
935
9,529
2
Vollenweider loading rates for phosphorus (g/m /yr) based on mean
depth and mean hydraulic retention times of the four impoundments:
"Dangerous" "Permissible"
(Eutrophic Rate) (Oligotrophic rate)
Northboro 5.20 2.60
Hudson 5.30 2.65 .
Maynard 4.00 2.00
Billerica 12.40 6.20
-------
34
VI. LITERATURE REVIEWED
Anonymous, 1974. The Assabet River, 1974. Part a. Water quality
survey data. MA Divn. Water Poll. Contr., Westboro.
Blanc, F. C., and J. C. O'Shaughnessy, 1974. The biokinetics of
the Assabet River. Rept. to MA Divn. Water Poll. Contr., Res.
Proj. 73-05, Northeastern Univ., Boston.
Cady, Robert M., 1973. Treatment plant questionnaires. MA Divn.
Water Poll. Contr., Boston.
Cooperman, Alan N., and William R. Jobin, 1971. Report on pollution
of the Assabet River. MA Divn. of Water Poll. Contr., Boston.
Hogan, Paul, 1975. Personal communication (locations and character-
istics of STP's). MA Divn. Water Poll. Contr., Westboro.
Vollenweider, Richard A. (in press). Input-output models. Schweiz.
Z. Hydrol.
-------
35
VII. APPENDICES
APPENDIX A
TRIBUTARY FLOW DATA
-------
LAKE CODE 2512
TRIBUTARY FLOW INFORMATION.FOR MASSACHUSETTS
NORTHBORO IMPOUNDMENT
11/26/74
TOTAL DRAINAGE AREA OF LAKE
35.40
SUB-DRAINAGE
TRIBUTARY AREA
JAN
FE8
MAR
APR
MAY
NORMALIZED FLOWS
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
2512A1
2512A2
2512B1
2512ZZ
35.40
20.30
9.70
5.40
60.90
34.90
16.70
9.30
67.30
38.60
18.40
10.30
121.00
69. ?0
33.10
18.40
114.00
65.60
31.30
17.40
72.20
41.40
19.80
11.00
38.90
22.30
10.70
5.90
17.80
10.20
4.90
2.70
18.70
10.70
5.10
2.90
19.90
11.40
5.50
3.00
23.20
13.30
6.40
3.50
43.90
25.20
12.00
6.70
49.90
28.60
13.70
7.60
53.86
30.89
14.77
8.21
SUMMARY
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-DRAINAGE AREAS =
35.40
35.40
TOTAL FLOW IN
TOTAL FLOrf OUT
647.70
647.70
MEAN MONTHLY FLOWS AND OAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY
2512A1
FLO* DAY
FLOW DAY
FLOW
2512A2
9
10
11
1?
1
2
3
4
5
6
7
8
9
10
11
12
I
2
3
4
5
6
7
8
72
7^
72
72
73
73
73
73
73
73
73
73
72
72
72
72
73
73
73
73
73
73
73
73
17.50
27.10
108.00
125.00
110.00
110.00
94.60
148.00
80.10
51.30
59.10
32. ?0
10.00
15.60
62. ?P
71.50
62.80
62.90
54.10
85.30
46.00
29.40
33.90
18.40
9
14
9
13
10
10
14
12
9
14
26
9
14
9
13
10
10
14
12
9
14
26
21.30
24.50
193.00
58.40
116.00
198.00 23
124.00 28
95.20
37.50
54.20
15.30
12.20
14.10
110.00
33.50
66.60
113.00 23
71.00 28
54.60
21.50
31.10
8.70
97.70
121.00
56.00
69.60
-------
LAKF CODE 2512
TRIBUTARY FLOW INFORMATION FOR MASSACHUSETTS
NORTHPORO IMPOUNDMENT
11/26/74
MONTHLY FLOWS ANO DAILY FLOWS
MEAN FL04 DAY
TRIBUTARY
2512Q1
2512-??
MONTH
9
10
11
1?
1
2
3
4
5
*
7
8
9
10
11
12
1
•>
3
4
5
6
7
p
YF.AI
7,?
12
7?
72
73
73
73
73
73
73
73
73
7?
72
72
72
73
73
73
' 73
73
73
73
73
FLOW DAY
FLOW DAY
FLOW
4.P.O
7.50
29.60
34.20
3C.IO
30.00
25.90
40.70
'2.00
14.10
16.30
8.80
2.60
4.10
16.50
19.00
16.70
16.80
14.40
22.60
7.80
9.00
5.00
9
14
9
13
10
10
14
12
9
14
26
5,80
6.70
52.80
16.00
31.80
54.20 23 26.80
34.00 28 33.30
26.10
10.30
14.80
4.20
-------
LAKE CODE 2513
TRIBUTARY FLO* INFORMATION FOR MASSACHUSETTS
HUDSON IMPOUNDMENT
11/36/74
TOTAL DRAINAGE AREA OF LAKE
72.70
SUP-DRAINAGE
TRIBUTARY AREA
JAN
FEB
MAR
APR
. MAY
NORMALIZED FLOrfS
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
2513A1
2513A2
2513Z?
60.60
72.70
12.10
10*. 00 115.00 ?07.00 196.00
125.00 138.00 24fl.OO 235.00
20.80 ?3.00 41.30 39.10
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUR-ORAINAGt AREAS
124.00
14R.OO
24.70
72.70
72.70
66.
80.
13.
70 30.50
00 36.60
30 6.10
SUMMARY
32.
38.
6.
TOTAL
TOTAL
00
40
40
FLOd
FLOW
34.10
40.90
6.80
IN =
OUT =
39.70
47.60
7.90
1331
1330
75.10
90.10
15.00
.00
.60
85.40
103.00
17.10
92.27
110.65
18.42
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW 04Y
2513A1
P513A2
2513ZZ
9
10
11
12
1
2
3
4
5
6
7
8
q
10
11
1?
1
?
3
4
5
f>
7
ft
9
in
11
1?
1
?
3
14
q
*
7
P.
72
72
7?
72
73
73
73
73
73
73
73
73
72
72
72
72
73
73
73
73
73
73
73
73
7?
72
72
72
73
73
73
71
73
73
7'j
73
FLOW DAY
FLOW DAY
FLO*
30.00
46.40
IBS. 00
214.00
187.00
187.00
16?. 00
255.00
138.00
flB.OO
101.00
55.00*
36.00
55.70
223.00
25P.OO
225.10
225.00
194. OC
306.00
164.00
106.00
122.00
66.00
6.00
9.2P
37.00
42. PC
37.40
37.50
32.30
SO.RO
?7.40
17.60
?0.00
11.00
9
14
9
13
10
1C
\'t
12
9
-7
14
9
13
10
!•+
12
9
36.50
42.00
330.00
400.00
199.00
.339.00 24
212.00 28
163.00
64.20
43.RO
50.40
395.00
120.00
40C..OO ?4
25';. 00 28
1^6.00
77.00
164.50
2C8.00
196.00
T49.00
-------
LAKE CODE 2504
TRIBUTARY FLOW INFORMATION FOR MASSACHUSETTS
MAYNARD IMPOUNDMENT
11/36/74
TOTAL DRAINAGE AREA OF LAKE 113.00
JAN FEB MAR
SUB-DRAINAGE
TRIBUTARY AREA
APR
MAY
NORMALIZED FLOWS
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
2504A1
2504A3
250481
2504C1
2504ZZ
113.00
77.10
4.60
19.90
11.40
194.00
133.00
7.90
34. ?0
19.60
215.00
146.00
8.70
37. BO
21.70
385.00
263.00
15.70
67.90
38.90
365.00
249.00
14.90
64.30
36.80
231.00
157.00
9.40
40.60
23.30
124.00
84.80
5.10
21.90
12.50
56.80
38.80
2.30
10.00
5.70
59.70
40.70
2.40
10.50
6.00
63.50
43.30
2.60
11.20
6.40
74.00
50.50
3.00
13.00
7.50
140.00
95.60
5.70
24.70
14.10
159.00
109.00
6.50
28.10
16.10
171.89
117.32
7.00
30.29
17.35
SUMMARY
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-DRAINAGE AREAS =
113.00
113.00
TOTAL FLOW IN
TOTAL FLOW OUT
2067.70
2067.00
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY MONTH YEAR MEAN FLOW DAY
2504A1
FLOW DAY
FLOW DAY
FLOW
2504A3
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
1?
1
2
3
4
5
6
7
8
72
72
72
72
73
73
73
73
73
73
73
73
72
72
72
72
73
73
73
73
73
73
73
73
55.80
86.60
346.00
398.00
349.00
350.00
301.00
474.00
256.00
164.00
189.00
103.00
38.10
59.10
236.00
?72.00
239.00
238.00
206.00
324.00
174.00
112.00
129.00
70.00
9
14
9
13
10
10
14
12
9
9
14
9
13
10
10
14
1?
9
68.10
78.30
615.00
186.00
371.00
632.00 24
396.00 28
304.00
120.00
46.50
53.40
419.00
127.00
253.00
431.00 24
270.00 28
207.00
81.70
305.00
388.00
208.00
264.00
-------
TRIBUTARY FLOW INFORMATION FOR MASSACHUSETTS
11/26/74
LA«E CODE 2504
MAVNARD IMPOUNDMENT
MEAN MONTHLY FLOWS AND DAILY FLOWS
TRIBUTARY
2504B1
250&C1
2504ZZ
MONTH
YEAR
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
1?
1
2
3
4
5
*
7
8
9
10
11
12
1
2
3
4
5
6
7
8
7?
72
72
72
73
73
73
73
73
73
73
73
7?
72
72
72
73
73
73
73
73
73
73
73
72
72
72
72
73
73
73
73
73
73
73
73
MEAN FLOW DAY
2.30
3.50
14.10
16.20
14.20
14.20
12.30
19.^0
10.40
6.70
7.60
4.10
9,80
15.20
61,90
70.20
6KCO
61.60
53.10
83. nO
45.10
28.90
33.20
18.10
5.60'
8,80
34.80
40.20
35.30
35.40
30.40
^7.80
25.90
16.50
18.90
10.30
9
14
13
10
'0
14
12
9
9
14
13
10
0
14
12
9
*
FLOW DAY
2.80
3,20
7.60
15.10
n.->
. «u
16.10
12.40
4.90
12.00
1.3,80
.32.80
60.30
•0.0
b9.6G
53.50
21.10
FLOW DAY
FLOW
28
15.80
28
68.30
-------
FLO« INFORMS! ION FOR MASSACHUSETTS
11/26/74
LA
-------
APPENDIX B
PHYSICAL and CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 74/0^/10
351301
42 19 30.0 071 38 00.0
NORTHBORO IMPOUNDMENT
25 MASSACHUSETTS
DflTE TIME OEpTrt
FROM 0^
TO DAY FEET
OH 45 0000
TEMP
CENT
llEPALES
A
00300
DO
MG/L
00077
TRANSP
SECCMI
INCHES
00094
CNDUCTVY
FIELD
MICROMHO
00400
PH
SU
00410
T ALK
CAC03
MG/L
2111202
0005 FEET D
00630
N02J.N03
N-TOTAL
MG/L
00610
NH3-N
TOTAL
MG/L
DEPTH
16.4
6.3
42
20
6.50
10K
0.350
0.250
00665 00666
PHOS-TOT PHOS-DIS
MG/L P
0.275
MG/L P
0.212
VALUE KNOWN TO 8E LESS
THAN INDICATED
-------
STORE! RETRIEVAL DATE 74/11/26
351301
42 24 30.0 071 32 00.0
HUDSON IMPOUNDMENT
25 MASSACHUSETTS
DATE TIME DEPTH
FROM OF
TO DAY FEET
72/0*1/02 09 20 0000
7?/OH/04 14 30 0000
14 30 0004
72/10/06 13 55 0000
13 55 0003
00010
WATER
TEMP
CENT
17.2
24.1
14.9
00300
DO
M6/L
11.7
6.2
7.6
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
42
60
58
130
220
215
255
250
11EPALES
4
00400
PH
SU
6.40
6.50
6.60
6.45
6.55
00410
T ALK
CAC03
MG/L
10K
31
29
18
20
2111202
0006
00630
N02&N03
N-TOTAL
MG/L
0.260
0.530
0.500
1.760
1.860
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.170
0.780
0.720
0.090
0.080
00665
PHOS-TOT
MG/L P
0.153
0.476
0.466
1.230
1.170
00666
PHOS-DIS
MG/L P
0.136
0.416
0.385
1.230
1.160
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
7?/06/02 09 20 0000 2.5J
72/OP/04 14 30 0000 1.3J
72/10/06 13 55 0000 2.9J
K VALUE r\NOWN TO BF. LESS
THAN INDICATED
J VALUF KNOWN TO 3E IN ERROK
-------
STORET RETRIEVAL DATE 74/11/26
250401
42 25 34.0 071 28 11.0
MAYNARD IMPOUNDMENT
25 MASSACHUSETTS
DATE TIME DEPTH
FROM or
TO DAY FEET
72/06/02 09 00 0000
72/08/04 14 00 0000
14 00 0004
72/10/06 14 15 0000
14 15 0004
00010
WATER
TEMP
CENT
17.7
22.8
14.6
00300
DO
MG/L
4.7
4.2
6.2
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
36
60
72
120
178
160
205
200
11EPALES
3
00400
PH
SU
6.30
6.55
6.40
6.40
6.40
00410
T AUK
CAC03
MG/L
10K
24
27
25
12
2111202
0005
00630
N02&N03
N-TOTAL
MG/L
0.220
0.280
0.630
0.950
0.420
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.190
0.180
7.400
0.100
0.120
00665
PHOS-TOT
MG/L P
0.214
0.262
0.337
0.474
0.417
00666
PHOS-DIS
MG/L P
0.135
0.195
0.596
0.427
0.356
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UR/L
7?/06/02 09 00 0000 2.2J
72/08/04 14 00 0000 41.5J
72/10/06 14 15 0000 7.1J
K VALUE KNOWN TO BE LESS
THAN INDICATED
J VALUE KNOrtM TO BE 1M ERROR
-------
STORE! RETRIEVAL DATE 74/11/36
250402
42 25 07.0 071 29 30.0
MAYNARD IMPOUNDMENT
25 MASSACHUSETTS
11EPALES
3
2111202
0005 FEET
DEPTH
00010
DATE ' TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
72/08/04 14 15 0000
14 15 0004 23.9
72/10/06 14 ?5 0000
14 25 0004 14.8
00300 00077
DO TRANSP Ci>
SECCHI FIELD
MG/L INCHES M]
4.6
6.2
36
58
194
:TVY
i
IMHO
190
187
240
240
00400
PH
SU
6.50
6.45
6.35
6.30
00410
T ALK
CAC03
MG/L
25
24
22
23
00630
N02&N03
N-TOTAL
MG/L
0.390
0.380
1.300
1.250
00610
NH3-N
TOTAL
MG/L
0.240
0.280
0.130
0.150
00665
PHOS-TOT
MG/L P
0.321
0.942
0.630
0.820
00666
PHOS-DIS
MG/L P
0.251
0.222
0.590
0.550
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/10/06 14 ?5 0000
5.9J
J VALUE KNOWN TO BE IN ERROR
-------
STORE! RETRIEVAL DATE 74/11/36
251101
42 35 30.0 071 17 00.0
BILLERICA IMPOUNDMENT
25 MASSACHUSETTS
11EPALES
4
2111202
0010 FEET
DEPTH
DATE
FROM
TO
72/06/08
72/08/04
72/10/06
TIME DEPTH
OF
DAY FEET
17 50 0000
17 50 0010
15 00 0000
15 00 0004
15 00 0008
15 25 0000
15 25 0004
15 25 0007
00010
WATER
TEMP
CENT
19.5
19.7
24.5
24.4
16.9
16.5
00300
DO
MG/L
5.6
4.6
4.8
9.0
9.0
10.6
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
48
32
160
160
240
200
185
210
215
215
00400
PH
SU
6.40
6.50
6.90
6.50
6.50
8.15
7.05
7.30
00410
T ALK
CAC03
MG/L
10
10K
23
21
24
23
28
23
00630
N02&N03
N-TOTAL
MG/L
0.200
0.190
0.290
0.240
0.300
0.320
0.290
0.330
00610
NH3-N
TOTAL
MG/L
0.170
0.160
0.190
0.210
0.200
0.070
0.100
0.070
00665
PHOS-TOT
MG/L P
0.172
0.190
0.220
0.232
0.250
0.151
0.155
0.158
00666
PHOS-DIS
MG/L P
0.131
0.125
0.142
0.176
0.160
0.078
0.063
0.071
32217
DATE TIME DEPTH CHLPPHYL
FROM OF A
TO DAY FEET UG/L
72/06/08 17 50 0000 0.9J
72/08/04 15 00 0000 17.5J
72/10/06 15 25 0000 18.3J
VALUE KNOWN TO BE LESS
THAN INDICATED
J VALUE KNOWN TO
IN ERROR
-------
APPENDIX C
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 74/11/26
2512A1 LS2512A1
42 20 30.0 071 37 00.0
ASSABET RIVER
25 7.5 MARLBOROUGH
0/NORTHBORO IMP.
BOUNORY ST 8ROG NE OF CHAPINVILLE
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/02/10
73/03/10
73/03/23
73/05/12
73/06/09
73/07/14
73/OH/26
TIME DE°TH
OF
DAY FEET
10 45
15 09
10 15
09 00
07 45
07 55
08 15
08 30
11 30
00630
NO ?& NO 3
N-TOTAL
MG/L
2.100
0.880
0.660
0.710
0.600
0.750
0.610
1.380
0.820
1.540
00625
TOT KJEL
N
MG/L
0.835
1.1PO
0.690
2.310
1.600
1.500
3.100
2.SOO
0.900
0.750
00610
NH3-N
TOTAL
MG/L
0.115
0.357
0.150
0.270
0.280
0.450
0.270
0.240
0.100
0.054
00671
PHOS-DIS
ORTHO
MG/L P
1.260
0.320
0.072
0.126
0.168
0.230
0.220
0.580
0.315
0.700
00665
PHOS-TOT
MG/L P
1.370
0.600
0.138
0.190
0.230
0.315
0.315
0.700
0.425
0.800
-------
STORET RETRIEVAL DATE 74/11/26
2512A2 LS2512A2
42 19 30.0 071 38 00.0
ASSA8ET RIVER
?5 7.5 SHREWSBURY
I/NORTH80RO IMP.
US 20 BRDG AflOV MARLBOROUCHSTP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
7?/l?/09
73/03/10
73/03/23
73/04/28
73/05/1?
73/06/09
73/07/14
73/03/26
TIME DEPTH
OF
DAY FEET
11 05
15 21
09 10
09 ?0
OB 05
07 50
08 40
0* 25
08 40
11 45
00630
N02&.N03
N-TOTAL
MG/L
1.370
0.977
0.760
0.650
0.870
0.630
0.560
1.600
0.450
1.020
00625
TOT KJEL
M
MG/L
2.100
2.?00
1.680
1.200
1.540
1.600
?.800
3.890
1.380
3.400
00610
NH3-N
TOTAL
MG/L
1.020
0.680
0.280
' 0.410
0.650
0.380
0.580
1.600
0.610
2.500
00671
PriOS-DIS
OPTHO
MG/L P
0.640
0.092
0.280
0.450
0.294
0.320
1.580
•0.550
1.470
00665
PHOS-TOT
MG/L P
1.400
0.950
0.176
0.390
0.590
0.430
- 0.480
1.720
0.790
1.7?0
-------
STORET RETRIEVAL. DATE 74/11/26
2512A3 LS2512A3
42 17 30.0 071 38 30.0
ASSABET RIVER
25 7.5 SHREWSBURY
I/MORTH80RO IMP
ST HWY 135 8ROG 8ELO SHREWSBURY STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/23
73/04/28
73/05/12
73/06/09
73/07/14
73/08/26
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL M
UAY FEET MG/L MG/L
15
09
09
10
09
08
08
08
08
09
12
25
?0
40
45
30
15
00
50
30
00
00
1
0
0
0
0
0
c
0
0
1
0
0
.827
.960
.680
.580
.670
.490
.600
.280
.330
.100
.430
.880
3.
2.
1.
1.
1.
2.
1.
2.
2.
2.
1.
3.
400
700
680
400
700
200
800
200
100
800
800
100
00610 00671 00665
NHS-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L MG/L P MG/L P
1
1
0
0
0
0
0
0
0
c
0
1
.330
.200
.240
.590
.440
.440
.570
.570
.490
.990
.350
.600
0.
0.
0.
0.
0.
0.
0.
0.
1.
0.
1.
810
066
260
220
240
370
198
240
040
370
300
2.100
1.575
0.130
0.345
0.330
0.340
0.470
0.310
0.375
1.250
0.700
1.700
-------
STORE! RETRIEVAL DATE 74/11/26
2512A4 LS2512A4
42 17 00.0 071 38 30.0
ASSABET RIVER
25 7.5 SHREWSBURY
I/MORTHflORO IMP
ST HrfY 9 8ROG BELO WESTBOROSTP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/23
73/04/28
73/05/12
73/06/09
73/07/14
73/08/26
00630 00625
TIME DEPTH N02&N03 TOT KJEL
Of N-TOTAL N
DAY FEET
11
15
09
09
10
10
08
08
09
08
09
12
20
45
25
53
30
00
40
50
10
55
30
15
MG/L
1
0
0
ft
0
0
0
c
0
1
0
0
.300
.830
.490
.530
.600
.450
.590
.168
.120
.380
.03?
.700
MG/L
2.
»
•
•
•
•
0.
2.
2.
I.
1.
2.
600
600
000
150
470
400
990
500
520
150
600
900
00610 00671 00665
MH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
1.
0.
C.
0.
0.
0.
0.
0.
0.
0.
c.
1.
000
380
147
340
330
140
067
115
310
200
260
100
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
415
056
180
180
180
240
170
200
785
054
860
MG/L P
1.260
0.835
0.138
0.260
0.260
0.2<»0
0.315
0.280
0.270
0.860
0.490
1.100
-------
STORET RETRIEVAL DATE 74/11/26
2512A5 LS2512A5
42 17 00.0 071 38 00.0
ASSA8ET RIVER
25 7.5 SHREWSBURY
I/NORTHBORO IMP.
MAYNARD ST 8RDG ABOVE WESTBORO-STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/23
73/04/14
73/04/28
73/05/12
73/06/09
73/07/14
73/08/26
00630 00625
TIME DEPTH N026.N03 TOT KJEL
OF N-TOTAl. N
DAY FEET
11
15
09
09
11
09
08
08
08
08
08
09
12
30
35
10
50
00
42
25
50
20
55
35
10
10
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.105
.162
.300
.300
.410
.340
.189
.028
.023
.048
.069
.176
.088
MG/L
1.
1.
1.
1.
1.
0.
2.
1.
1.
1.
1.
3.
450
200
980
050
200
800
100
-------
STORET RETRIEVAL DATE 74/11/26
2512R1 LS2512B1
42 19 30.0 071 38 30.0
COLO HARBOR RROOK
25 7.5 SHREWSBURY
T/NOPTHBORO IMP.
HUDSON ST 8ROG
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/23
73/04/U
73/04/2H
73/05/12
73/06/09
73/07/14
73/08/26
00630 00625
TIME DEPTH N02S.N03 TOT KJEL
OF N-TOTAL N
DAY FFET
11
15
08
09
10
09
07
08
07
08
OB
08
11
00
15
35
30
40
10
55
05
40
30
20
35
35
MG/L
0
0
0
0
0
0
0
0
0
0
0
n
0
.299
.260
.330
.610
.390
.270
.336
.231
.180
.140
.200
.370
.230
MG/L
0.
0.
1.
0.
1.
1.
1.
1.
3.
1.
1.
0.
0.
600
600
260
320
540
?00
050
600
100
380
000
610
400
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL OPTHO
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.120
.138
.095
.04°
.080
.065
.060
.100
.126
.066
.088
.520
.025
MG/L
0.
0.
0.
0.
0.
0.
0.
• o.
0.
0.
0.
0.
p
015
027
005K
005
005K
007
007
006
008
Oil
Oil
010
MG/L P
0.062
0.094
0.008
0.005
0.010
0.015
0.015
0.010
0.015
0.025
0.030
0.045
0.035
-------
STORET RETRIEVAL DATE 74/11/26
2512C1 LS2512C1
42 16 30.0 071 39 00.0
HOCOMONCO POND OUTLET
25 7.5 SHREWS80RO
T/NORTHBORO IMP.
OTIS ST BRDG ABOV WESTBORO STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/OQ
7P/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/23
73/04/14
73/04/28
73/05/12
73/06/09
73/07/14
73/09/26
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FFET
11
15
09
10
09
09
08
08
08
09
08
09
12
35
40
35
00
00
50
30
50
30
00
45
20
10
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0?6
093
430
850
660
610
370
154
058
033
085
740
048
MG/L
0.
0.
1.
0.
1.
1.
0.
1.
1.
1.
0.
0.
0.
325
500
900
900
100
800
650
500
150
150
880
660
170
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
054
075
075
060
068
063
028
260
054
060
066
018
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
015
005K
005K
005K
005K
005K
010
005K
006
008
006
029
006
MG/L P
0.028
0.010
0.010
0.015
0.015
0.015
0.015
0.015
0.010
0.030
0.020
0.030
0.015
K y//\Lllf
r T. i c .• T r
-------
STORE! RETRIEVAL DATE. 74/U/27
251250 TF251250
42 17 30.0 071 38 30.0
P005500
?50?7 7.5
T/NORTH60RO IMPOUNDMENT
ASSABETT RIVE*
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
73/08/0?
73/09/07
7V1C/01
73/10/31
73/1 l/?7
73/12/27
74/02/01
74/03/01
74/04/01
74/05/01
74/06/04
CO 6 30
TIME DF.pTH NO?S.N03
OF N-TOTAL
UAY FFET
08
1.3
1?
1?
10
14
11
DP
09
08
09
30
IS
45
so
40
00
30
30
00
45
?0
00625
TOT KJEL
MG/L MG/L
2
u
3
3
?
~>
1
1
y
?
.310
.700
.7-0
. 1 0 0
.310
.000
.200
.120
.440
.030
8
16
15
16
16
6
1?
8
7
12
16
.601
.800
.800
.000
.500
.950
.000
,?00
.450
.000
."00
OP610 00671
NH3-N PnOS-DIS
TOTAL ORTHO
MG/L
•3
7
6
7
1
4
2
•y
t
i~<
.310
.300
.000
.000
.700
.200
.600
.000
. 701)
.100
MG/L
6.
9.
5.
7.
1.
2.
?.
2.
3.
6.
p
100
400
300
700
380
160
700
200
700
300
00665
PHOS-TOT
MG/L P
6. HOC
10.500
7.100
8.900
2.100
5.180
h.600
3.130
5.100
7.400
50051
FLOW
RATE
1ST MGO
J.100
1.250
1.100
i.aoo
1.600
3.000
2.700
2.2CO
. I. BOO
1.550
50053
CONDUIT
FLOW-MGO
MONTHLY
1.200
1.280
1.150
1.070
1.150
2.520
2.700
2.000
2.000
2.000
1.610
-------
STORE! RETRIEVAL DATE 74/11/27
251251 AS251251 P007500
4? 17 00.0 071 38 30.0
WESTBORO
25 7.5 SHREWSBURY
T/NOPTHBORO IMPOUNDMENT
ASSABETT RIVER
11EPALES 2141204
-
73/01/30 17 00
73/02/38 00 00
CP(T)-
73/02/28 08 00
73/03/30 07 00
CP(T)-
73/03/30 15 00
73/04/30 07 00
CP < T >-
73/04/30 15 00
73/05/30 07 00
CP(T>-
73/05/30 15 00
73/06/39 08 00
CP(T)-
73/06/39 15 00
73/07/31 07 00
CP(T>-
73/07/31 16 00
73/08/31 07 00
CP(T)-
73/08/31 15 00
73/09/38 07 00
CP(T>-
73/09/28 14 00
73/10/31 07 00
CP(T)-
73/10/31 14 00
73/11/29 07 30
CP-
73/11/29 14 30
3.700
6.000
6.000
1.400
1.840
4.600
1.500
1.540
15.000
5.900
0.230
N
Mfi/L
3.000
1.890
1.540
9.100
5.500
1.530
0.300
1.380
2.400
3.000
13.000
00610 00671 00665 50051 50053
NH3-N PHOS-fllS PHOS-TOT FLOW CONDUIT
TOTAL OPTHO RATE FLOW-MOD
MG/L MG/L P MG/L P INST MGD MONTHLY
0.645 4.200 4.200 0.890 0.900
1.075 3.600 3.800 0.792 0.759
0.450 5.900 6.100 0.550 0.676
4.800 5.100 5.100 0.615 0.624
2.400 5.100 5.250 0.655
0.094 3.300 5.920 0.822
0.090 9.600 9.800 0.802
0.794
3.400 6.000 0.645 0.705
0.340 5.100 5.600 0.745 0.584
0.904
0.110 6.300 7.000 0.770 0.804
0.805
0.300 1.540 1.800 0.745 0.730
3.900 3.200 3.700 0.754
0.742
-------
STORE! RETRIEVAL DATE 74/11/27
251251 AS251251 P007500
4? 17 00.0 071 38 30.0
w'FSTHORO
25 7.5 SHREWSBURY
T/NORTHHOWO IMPOUNDMENT
ASSABE'TT RIVER
11EPALES 2141204
4 0000 FEET DEPTH
HATE
FROM
TO
00630
T[ME DFPTH NO?^N03
0^ M-TOTAL
DAY FFF.T MG/L
906?5
TOT KJEL
M
MG/L
00610
NH3-N
TOTAL
MG/L
G0671
PHOS-OIS
ORTHO
MG/L P
00665
PHOS-TOT
MG/L o
50051
FLOW
RATE
INST MOD
50053
CONDUIT
FLOrt-MGD
MONTHLY
73/12/2H 07 00
CP(T)-
73/12/2« 14 00
330
6.900
1.760
0.560
1.600
1.260
1.100
-------
STORE! RETRIEVAL DATE 74/11/26
2513A1 LS2513A1
42 23 00.0 071 35 00.0
ASSABET RIVER
25027 7.5 HUDSON
I/HUDSON IMP.
CHAPIN RD BRDG BELO MARLBOROUGH STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/12/09
73/01/13
73/03/10
73/03/24
73/04/14
73/04/28
73/05/12
73/06/09
TIME DEPTH
OF
DAY FEET
10 05
09 30
1? 14
08 30
09 00
C9 50
11 55
10 00
00630
N02S.N03
N-TOTAL
MG/L
1.430
0.620
0.840
0.470
0.520
0.480
0.378
0.440
0.410
00625
TOT KJEL
N
MG/L
1.980
0.630
1.050
0.420
3.000
1.320
0.660
3.360
00610
NH3-N
TOTAL
MG/L
0.160
0.094
0.330
0.168
0.190
0.170
0.066
0.086
0.252
00671
PHOS-DIS
ORTHO
MG/L P
1.050
0.063
0.092
0.110
0.140
0.120
0.160
0.231
00665
PHOS-TOT
MG/L P
1.160
0.100
0.170
0.150
0.195
0.233
0.160
0.215
0.340
-------
STORET RETRIEVAL DATE 74/11/26
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
7V03/10
73/03/24
73/04/14
73/04/28
73/05/12
73/06/09
TIME 1
OF
DAY 1
10 30
09 56
09 40
1? 26
08 50
10 00
09 00
09 40
11 50
10 10
FEET
2513A2 LS2513A2
42 23 00,0 071 33 00.0
ASSABET RIVER
25 7.5 HUDSON
0/HUDSON IMP.
ST HWY 62 BRDG ABOVE HUDSON STP
11EPALES 2111204
4 0000 FEET DEPTH
0630
OTAL
G/L
0.880
0.770
0.600
0.810
0.430
0.500
0.480
0.380
0.370
0.430
00625
TOT KJEL
N
MG/L
1.050
1.950
1.000
1.050
0.915
l.?60
2.970
0.780
1.900
3.330
00610
NH3-N
TOTAL
MG/L
0.096
0.230
0.090
0.230
0.120
0.110
0.220
0.063
0.092
0.280
00671
PHOS-DIS
ORTHO
MG/L P
0.^90
0.273
0.055
0.079
0.078
0.126
0.170
0.120
0.132
0.250
00665
PHOS-TOT
MG/L P
0.570
0.357
0.088
0.155
0.110
0.160
0.220
0.165
0.130
0.330
-------
STORE! RETRIEVAL DATE 74/11/26
2513A3 LS2513A3
42 24 30.0 071 32 00.0
ASSABET RIVER
25 7.5 HUDSON
0/HUDSON IMP.
ST HWY 62 HRDG 8ELO HUDSON STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
7P/09/09
72/10/14
73/03/10
71/04/14
73/04/28
73/05/12
73/06/09
TIME DEPTH
OF
DAY FEET
10 02
09 00
09 00
09 50
11 ?5
10 20
00630
N028.N03
N-TOTAL
MG/L
1.255
0.920
0.440
0.470
0.410
0.410
0.430
00625
TOT KJEL
N
MG/L
1.300
1.000
1.760
1.800
0.840
2.700
00610
NH3-N
TOTAL
MG/L
0.475
0.500
0.231
0.154
0.19P
0.126
0.260
00671
PHOS-DIS
OPTHO
MG/L P
0.800
0.176
0.199
0.154
0.176
0.252
00665
PHOS-TOT
MG/L P
0.945
0.220
0.220
0.210
0.240
0.330
-------
STOPET RETRIEVAL DATE 74/11/37
251350 TF251350 P010000
42 24 00.0 071 32 30.0
HUDSON
25 7.5 HUDSON
T/HUDSON IMPOUNDMENT
ASSABETT «lVER
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
72/11/24
CP(T>-
72/11/24
72/12/29
73/02/02
CP-
73/02/02
73/03/01
CPITt-
73/03/01
73/04/02
CPUJ-
73/04/0?
73/04/30
CP(T)-
73/04/30
73/05/31
C° (T) -
73/05/31
73/06/29
CP(T>-
73/06/20
73/07/31
CP(T>-
73/07/31
73/08/31
CP(T)-
73/03/31
73/10/01
73/10/31
Cp-
73/10/31
73/1 1/30
00630
TIME DEPTH N02^N03
OF N-TOTAL
DAY FEET MG/L
07
16
07
15
07
16
07
16
07
15
07
16
07
15
07
16
08
15
08
07
15
07
00
00.
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0.990
2.080
1.050
1.400
1.000
1.600
1 . 750
?.OCO
2.800
0.020
4.600
00625
TOT KJEL
N
MG/L
4.600
12.130
14.700
17.800
9.500
18.000
14.700
12.200
12.600
16.000
33.600
19.500
00610
NH3-N
TOTAL
MG/L
0.
5.
9.
10.
60
9.
9.
8.
6.
23.
13.
180
300
600
400
200
050
990
500
700
000
700
00671
PHOS-DIS
ORTHO
MG/L P
1.300
2.300
3o 700
6.000
2o300
5.600
5.470
5.200
5.300
10.200
4.400
00665 50051 50053
PHOS-TOT FLOW CONDUIT
RATE FLOW-MGD
MG/L P INST MGO MONTHLY
2.500
3.350
4.900
7.700
3,600
7o050
60 700
63600
6.900
9.000
11.000
8.700
1
2
1
1
1
1
1
1
1
0
1
1
.250
.000
.300
.210
.500
o500
.500
,,-':5Q
.000
.830
.000
.010
1.000
2.000
1.500
1.300
1.500
1.500
1.500
1.500
1.200
0.910
1.000
1.000
11.600
6.300
1.000
1.000
73/1 1/30 15 00
-------
STORE! RETRIEVAL DATE 74/11/27
251351 AS251351 P005000
42 21 00.0 071 33 00.0
MARLBORO WESTERLY
25 7.5 MARLBORO
T/HUDSON IMPOUNDMENT
ASSABETT RIVER
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
72/11/30 08 00
CP(T)-
72/11/30 17 00
72/12/07 08 00
CP(T)-
72/12/07 17 00
73/01/03 08 00
CP(T)-
73/01/03 16 00
73/03/16 08 00
CP(T)-
73/03/16 17 00
73/07/02 08 00
CP(T)-
73/07/03 08 00
73/08/30 08 30
CPU)-
73/08/31 08 30
73/09/25 08 00
CP(T)-
73/09/26 08 00
73/10/11 08 00
CP(T)-
73/10/12 08 00
74/01/04 08 00
CP(T)-
74/01/05 08 00
74/02/19 08 00
CP(T>-
74/02/20 08 00
74/04/16 08 00
CP(T)-
74/04/17 08 00
0.880
8.500
0.048 19.000
0.900
0.095
0.180
1.920
3.300
3.000
0.120
0.160
0.320
5.600
6.300
2.200
2.500
1.700
9.450
6.600
?.200
00610 00671 00665 50051 50053
NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLOW-MGD
MG/L MG/L P MG/L P INST MGD MONTHLY
0.840
12.000
1.680
3.550
0.670
3.260
0.045
0.120
0.120
1.700
1.250
4.275
0.755
2.200
3.500
5.400
4.200
5.000
1.380
2.200
3.000
2.800
3.600
0.680
4.200
5.250
1.900
2.400
3.300
1.510
1.600
1.800
1.350
1.610
1.300
1.270
1.170
1.150
1.090
1.530
0.740
1.630
1.500
1.370
1.260
1.300
1.300
1.050
1.250
1.120
1.160
-------
STORE! RETRIEVAL DATE 74/11/26
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/24
73/04/14
73/04/28
73/05/1?
73/06/09
00630
TIME DEPTH N02&N03
OF N-TOTAL
JAY FEET MG/L
12 45
10 50
10 10
13 12
10 10
09 30
10 30
10 15
10 15
10 45
10 35
0.697
0.480
0.470
0.730
0.4RO
0.360
0.470
0.399
0.168
0.340
0.420
00625
TOT KJEL
N
MG/L
1.470
1.000
1.260
1.150
0.480
2.300
2.200
0.590
1.500
5.000
00610
NH3-N
TOTAL
MG/L
0.180
0.210
0.176
0.350
0.140
0.1 3fi
0.200
0.132
0.111
0.140
0.300
00671
PHOS-DIS
ORTHO
MG/L P
0.022
0.220
0.056
0.115
0.047
0.175
0.110
0.150
0.115
0.160
0.240
11EPALES
4
00665
PHOS-TOT
MG/L P
0.550
0.290
0.088
0.160
0.070
0.220
0.155
0.200
0.155
0.210
0.320
2504A1 LS2504A1
42 25 30.0 071 28 00.0
ASSAtiET RIVtR
25 7.5 MAYNARO
O/MAYNARO IMPOUNDMEND
ST HWY 62 AND 17 BRDG ABOV MAYNARU STP
2111204
0000 FEET DEPTH
-------
STORET RETRIEVAL DATE 74/11/26
2504A2 LS2504A2
42 27 00.0 071 24 00.0
ASSABET RIVER
25 7.5 MAYNARO
I/MAYNARO IMP.
ST HWY BROG BELO MAYNARO STP
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
7P/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/24
73/04/14
73/04/28
73/05/1?
73/06/09
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
10
10
13
09
10
10
10
10
10
10
25
35
25
00
55
15
40
00
30
28
45
MG/L
0
0
0
0
0
0
0
0
0
0
0
.540
.650
.470
.760
.510
.410
.470
.390
.300
.399
.430
MG/L
2.
0.
0.
1.
1.
0.
2.
1.
1.
2.
1?5
900
9BO
050
540
540
310
500
540
500
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
260
290
189
336
176
154
252
100
140
140
230
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
510
273
054
120
058
138
115
147
115
160
252
MG/L P
0.620
0.360
0.084
0.170
0.085
0.200
0.175
0.195
0.160
0.240
0.330
-------
STORET RETRIFVAL DATF. 74/11/26
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
72/12/09 09 50
73/01/13 1? 55
73/0?/10 09 40
73/03/24 09 50
"504A3 LS2504A3
4? 24 30.0 071 31 30.0
ASSABET RIVER
25 7.5 HUDSON
I/MAYNARD IMP.
ST HWY 62 8RDG RELO HUDSON STP
11EPALES 2111204
4 0000 FEET DEPTH
0630
OTAL
iG/L
0.590
0.7*0
0.570
0.510
00625
TOT KJEL
N
MG/L
1.300
0.940
0.540
1.680
00610
NH3-N
TOTAL
MG/L
0.189
0.360
0.16P
O.P70
00671
PhOS-OIS
ORTriO
MG/L P
0.07ft
0.087
0.084
0.168
00665
PHOS-TOT
MG/L P
0.132
0.170
0.125
0.220
-------
STORET RETRIEVAL DATE 74/11/26
2504B1 LS250481
42 25 30.0 071 28 00.0
TAYLOR BWOOK
25 7.5 MAYNARD
T/MAYNARD IMP.
BRDG OFS ST HWY 117 SW EDGEOF MAYNARO
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
73/03/24
73/04/28
73/05/12
73/06/09
TIME DEPTH
OF
DAY FEET
11 10
10 20
10 15
10 00
11 05
11 01
00630
N02&N03
N-TOTAL
MG/L
0.162
0.070
0.054
0.290
0.044
0.060
00625
TOT KJEL
N
MG/L
0.700
0.600
1.680
0.710
1.600
2.200
00610
NH3-N
TOTAL
MG/L
0.173
0.072
0.090
0.092
0.110
0.204
00671
PHOS-DIS
ORTHO
MG/L P
0.025
0.008
0.011
0.110
0.069
0.031
00665
PHOS-TOT
MG/L P
0.060
0.027
0.020
0.150
0.082
-------
STORET RETRIEVAL DATE 74/11/26
2504C1 LS2504C1
42 25 00.0 071 28 30.0
ASSABET BROOK
25 7.5 MAYNARD
T/MAYNARO IMP.
8RDG NEAR GOLF COURSE W SIDE OF RIVER
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
7?/10/14
73/04/23
73/05/12
73/06/09
TIME DEPTH
OF
DAY FEET
11 05
10 45
10 05
10 30
10 55
00630
N02&N03
N-TOTAL
MG/L
0.4QO
0.250
0.150
0.160
0.132
00625
TOT KJEL
N
MG/L
1.150
0.700
0.700
1.890
3.360
00610
NH3-N
TOTAL
MG/L
0.105
0.053
0.069
O.OB1
0.170
00671
PHOS-OIS
ORTHO
MG/L P
0.012
0.007
0.012
0.012
0.017
00665
PHOS-TOT
MG/L P
0.028
0.017
0.030
0.035
0.055
-------
STORET RETRIEVAL DATE 74/11/27
251153 TF251153 P009700
42 26 30.0 071 26 30.0
MAYNARO
25 7.5 MAYNARD
T/MAYNARO IMPOUNDMENT
ASSABETT RIVER
IIE^ALES 2141204
4 0000 FEET DEPTH
OATE
FROM
TO
72/11/29
CP(T)-
72/11/29
72/12/29
CD (T>-
72/12/29
73/01/30
CP(T)-
73/01/30
73/02/28
CP(T)-
73/02/28
73/03/29
CP-
73/03/29
73/04/30
CP(T)-
73/04/30
73/05/30
CP(T)-
73/05/30
73/06/29
CP(T>-
73/06/29
73/07/30
CPITJ-
73/07/30
73/08/29
CP(T>-
73/0^/29
73/09/28
CP(T>-
73/09/28
73/10/31
73/11/29
CP(T)-
73/1 1/29
00630
TIMF DEPTH N02S.N03
OF N-TOTAL
DAY FEET MG/L
11
16
11
16
11
16
10
16
09
14
11
14
11
15
11
15
11
16
11
15
09
13
09
11
13
00
00
00
00
00
00
00
00
00
00
00
00
00
30
00
00
00
00
00
00
00
00
00
30
30
0
1
0
0
1
0
1
1
0
0
1
1
.480
.500
.560
.630
.600
.740
.110
.680
.560
.630
.890
.600
00625
TOT KJEL
N
MG/L
33.800
25.000
31.000
34.000
38.700
18.000
29.000
25.500
25.200
31 .000
30.600
26.000
37.000
00610 00671
NH3-N PHOS-OIS
TOTAL ORTHO
MG/L MG/L P
11.200
7.200
11.200
17.000
11.200
6.000
16.700
13.200
9.800
16.600
21.000
13.000
18.000
4.775
3.500
4.450
4.900
5.150
1.895
3.970
2.730
3.700
3.160
5.300
2.940
3.300
00665 50051 50053
PHOS-TOT FLOW CONDUIT
PATE FLOW-MGO
MG/L o INST MGD MONTHLY
9.100
8.900
8.400
10.500
2.800
6.500
4.300
6.200
4.800
7.900
4.300
6.700
0
0
0
0
0
0
0
0
0
0
0
0
0
.800
.800
.800
.eoo
.800
.800
.800
.800
.800
.800
.800
.800
.800
0.800
0.800
O.flOO
0.800
o.eoo
0.800
o.eoo
0.800
0.300
0.800
0.800
o.eoo
0.800
-------
STORE! RETRIEVAL DATE 74/11/26
2511A2 LS2511A2
42 30 30.0 071 19 00.0
CONCORD RIVER
25 7.5 BILLERICA
0/HILLERICA IMP.
ST HWY 225 8RDG 8ELOW CONCORD STP
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/11/11
72/12/09
73/01/13
73/02/10
73/03/10
73/03/24
73/04/28
73/05/12
73/06/09
73/07/14
73/08/11
TIME DEPTH
OF
DAY FEFT
10 45
11 45
10 00
11 30
11 15
10 00
11 00
10 00
10 30
11 15
09 40
10 40
11 45
00630
N02&N03
N-TOTAL
MG/L
0.041
0.430
0.560
0.450
0.650
0.470
0.420
0.420
0.300
0.315
0.252
0.220
0.230
00625
TOT KJEL
N
MG/L
0.800
1.000
1.380
0.670
0.870
0.800
2.800
4.300
1.690
1.700
2.500
2.200
1.100
00610
NH3-N
TOTAL
MG/L
0.063
0.176
0.012
0.120
0.210
0.105
0.225
0.189
0.200
0.150
0.189
O.*80
0.210
00671
PHOS-DIS
OPTHO
MG/L P
0.005K
0.105
0.147
0.038
0.054
0.025
0.060
9.040
0.098
0.098
0.120
0.189
0.147
00665
PHOS-TOT
MG/L P
0.021
0.189
0.240
0.082
0.095
0.045
0.115
0.065
0.155
0.150
0.195
0.260
0.270
OF K,\.O.-'\I rr. -;
TH?M I'-,DI "'.T^.
-------
STORE! RETRIEVAL DATE 74/11/26
2511A1 LS2511A1
42 28 30.0 071 21 00.0
CONCORD RIVER
25 705 CONCOPD
I/RILLERICA IMP.
MONUMENT ST BROG ABOVE CONCORD STP
11EPALES 2111204
4 oooo FEET DEPTH
DATE
FROM
TO
72/09/09
72/10/14
72/12/09
73/01/13
73/02/10
73/03/10
73/03/24
73/04/2H
73/05/1?
73/06/09
73/07/14
73/08/11
00630 00625
TIME DEPTH N02S.N03 TOT KJEL
OF N-TOTAL N
DAY FEET
1?
12
13
13
11
11
11
11
10
10
10
11
30
50
15
00
15
30
30
30
40
10
10
?5
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
.243
.420
.450
.640
.440
.410
.420
.320
.290
.280
.220
.360
MG/L
1.
1.
0.
0.
0.
1.
5.
1.
0.
1.
1.
?.
500
400
540
870
4?0
«00
400
500
950
260
200
300
00610 00671 00665
NH3-N PHOS-DIS OHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
240
170
1?6
168
071
160
252
350
138
100
660
230
MG/L
0.
0.
0.
C.
0.
0.
0.
0.
0.
0.
D.
0.
p
060
107
032
042
032
052
044
092
092
110
180
170
MG/L P
0.168
0.180
0.061
O.ORO
0.032
0.105
O.ORO
0.160
0.157
0.170
0.270
0.270
-------
STORE! RETRIEVAL DATE 74/11/26
DATE
FROM
TO
72/09/09
72/10/14
73/01/13
73/02/10
73/01/10
73/03/24
73/04/28
73/05/12
73/06/09
73/07/14
73/08/11
TIME DEPTH
OF
DAY FEFT
10 45
13 15
12 00
11 00
11 05
11 00
11 00
10 30
10 30
10 00
10 10
00630
N02&N03
N-TOTAL
MG/L
0.420
0.320
0.540
0.4RO
0.410
0.370
0.100
0.069
0.04«
0.880
0.063
00625
TOT KJEL
M
MG/L
0.675
0.900
0.600
0.420
1.680
3.360
1.500
2.400
5.200
1.470
4.200
00610
NH3-N
TOTAL
MG/L
0.086
3.140
0.044
0.105
0.294
0.096
0.087
0.075
0.215
0.100
0.280
00671
PHOS-DIS
ORTHO
MG/L P
0.138
0.033
0.014
0.026
0.010
0.012
0.036
0.035
0.077
0.118
0.078
11EPALES
4
00665
PHOS-TOT
MG/L P
0.260
0.080
0.035
0.045
0.040
0.035
0.0 7S
0.070
0.135
0.270
0.200
2511B1 LS2511R1
42 27 30.0 071 22 00.0
SUD*URY RIVER
25 7.5 CONCORD
T/8ILLERICA IMP.
ELM ST 8RDG W EDGE OF CONCORD
2111204
0000 FEET DEPTH
-------
STORET RETRIEVAL DATE 74/11/26
2511A3 LS2511A3
42 35 30.0 071 17 00.0
CONCORD RIVER
25 7.5 BILLERICA
0/BILLERICA IMP.
LOWELL ST-MT PLEASANT ST BROG AT DAM
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
7P/09/09
7?/10/l<»
72/12/09
73/01/13
73/0?/10
73/03/10
73/03/24
73/04/28
73/05/12
73/07/14
73/08/11
00630 00625
TIME DEPTH N02J.N03 TOT KJEL
OF N-TOTAL M
DAY FEET
11
10
11
10
09
10
09
10
09
10
11
?3
45
15
30
00
15
00
00
^5
55
15
MG/L
0
0
0
0
0
0
0
0
0
0
0
.540
.410
.450
.6?0
.450
,4?0
.380
.260
.294
.0?0
.138
MG/L
1.
0.
0.
1.
0.
2.
3.
1.
1.
3.
3.
200
Q50
540
050
510
500
000
500
700
500
380
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
154
168
120
19P
095
210
154
37«
126
37R
590
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
160
094
034
048
024
052
039
084
087
140
120
MG/L P
0.280
0.176
0.084
0.0«5
0.045
0.095
0.075
0.145
0.145
0.260
0.200
-------
STORE! RETRIEVAL DATE 74/11/27
251150 TF251150 P000500
42 33 30.0 071 17 30.0
BILLERICA CORR INST
25 7.5 BILLERICA
T/BILLERIC4 IMPOUNDMENT
CONCORD RIVER
11EPALES 2141204
4 0000 FEET (DEPTH
C0630 00625
DATE TIME DEPTH N02f-N03 TOT KJEL
FROM OF
TO DAY FF.ET
72/12/19 08 15
CP(T>-
72/12/19 15 15
73/01/18 08 15
CP(T)-
73/01/18 15 15
73/02/21 08 15
CP(T)-
73/02/21 15 15
73/03/22 08 15
CP(T>-
73/03/22 15 15
73/04/24 08 15
CP(T>-
73/04/24 15 15
73/05/30 08 15
CP(T>-
73/05/30 15 15
73/06/26 08 15
CP(T)-
73/06/26 15 15
73/C7/?4 08 15
CP(T>-
73/07/24 15 15
73/08/28 08 15
CP(T>-
73/08/2H 15 15
73/0-V28 08 15
CP-
73/09/28 15 15
73/10/29 08 15
f.P < T > -
73/10/29 15 15
73/11/14 08 15
CP(T>-
73/11/14 15 15
TOTAL
MG/L
5.700
6.800
2.500
3.700
7.100
6.400
6.900
5.600
5.000
6.?00
3.200
N
MG/L
7.400
11.500
10.000
9.500
7.800
4.800
3.300
5.4no
3.900
5.500
8.600
7.400
00610 00671 00665 50051 50053
NH3-N PHOS-DIS PHOS-TOT FLOW CONDUIT
TOTAL ORTHO RATE FLO*-MGO
MG/L MG/L P MG/L P INST MOD MONTHLY
1.790 3.910
1.100 3.POO
1.470 5.000
7.500
0.078 0.074
4.000 3.600 5.100 0.026 0.068
5.700 4.200 4.800 0.029 0.083
S.100 3.100 3.450 0.022 0.072
2.900 2.800 4.300 0.043 0.091
l.*9n 3.900 5.900 0.029 0.071
0.025 0.069
1.600 4.400 5.700 0.027
.0.470 4.000 5.500 0.032
0.470 5.700 8.500 0.024
0.067
3.960 S.700 0.028 0.063
0.057
0.024 0.057
0.051
-------
STORET RETRIEVAL DATE 74/11/27
251151 SK251151 P006000
42 28 30.0 071 20 30.0
CONCOKU
25 7.5 CONCORD
T/8ILLERICA IMPOUNDMENT
CONCORD RIVER
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
73/07/23
CP(T>-
73/07/23
73/OS/29
CP(T>-
73/OR/29
73/10/02
CP(T>-
73/10/02
73/1 1/30
CP(T)-
73/11/30
74/01/29
CP-
74/01/29
74/03/13
CP(T)-
74/03/13
C0630 00625
TIME DEPTH NO?*yN03 TOT KJEL
OF N-TOTAL N
OH/ FEET MG/L MG/I.
10
15
10
15
09
16
09
14
09
15
09
15
00
00
00
~<0
30
00
00
00
00
00
00
00
4.700 1.600
?.100
O.ObO ?«.000
2.300 4.50C
0.040 1.200
0.040 4.400
00610 00671 00665 50051 50053
NH3-N PHOS-OIS PHOS-TOT FLOW CONDUIT
TOTAL OWTHO KATE FLOrt-MGD
MG/L MG/L P MG/L ? INST MGO MONTHLY
1.600 ?.700
3.060
15.KOO 3.900
P.200 2.400
0.040K 2.600
G.050K 0.050K
2
3
6
3
ft
3
.700
.300
.000
.200
.600
.900
0
0
1
0
0
0
.937
.597
.000
.705
.800
.732
0
1
1
0
0
0
.980
.030
.000
.6^0
.700
.841
K V •!.!!:'; .-...•
I "•:, C T •-! - 1 -.. , I r ' ;
-------
STDRET RETRIEVAL DATE
OATE '
FROM
TO
72/1 1/24
72/12/2*
73/01/29
7/*/04/ 12
74/05/14
74/06/05
74/08/15
74/10/10
TIME
OF
DAY
10 30
13 30
10 30
09 30
11 00
11 30
10 30
FFFT
251152 SF2bllS2 P000925
42 27 30.0 071 23 30.0
CONCORD REFORMATOMr
25 7.5 MAYNAPD
T/^ILLERICA IMPOUNDMENT
ASSABF.TT RIVER
11EPALES 2141204
4 oooo FEET DEPTH
0*30
t.N)03
OTAL
0/1.
0.0*6
0.033
0.015
0.640
?.*00
0.1*0
3.543
u . 1 ?0
006'5
TOT KJEL
N
MG/L
K.R50
13.000
24.000
22.000
27.000
28.000
5. 500
5 . 0 0 C
00*10
NH3-N
TOTAL
Mfj/L
5.200
7.400
J7.0CO
IS. 000
] 1.500
14.500
0.220
2.400
00671
PHOS-DIS
ORTHO.
MG/L P
3.300
0.572
0 . 760
3.200
3.100
.3.400
0.0*5
0.510
00665
PHOS-TOT
MG/L R
3.500
2.200
3.900
7.100
*.aoo
7.900
6.0.00
1 .900
50051
FLOd
RATE
INST MGO
50053
CONDUIT
FLOw-MGD
MONTHLY
------- |