U.S. ENVIRONMENTAL PROTECTION AGENCY NATIONAL EUTROPHICATION SURVEY WORKING PAPER SERIES REPORT ON WOODS POND BERKSHIRE COUNTY MASSACHUSETTS EPA REGION I WORKING PAPER No, 223 PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY An Associate Laboratory of the NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON and NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA «GPO 697.032 ------- REPORT ON WOODS POND BERKSHIRE COUNTY MASSACHUSETTS EPA REGION I WORKING PAPER No, 223 316 WITH THE COOPERATION OF THE MASSACHUSETTS DIVISION OF WATER POLLUTION CONTROL AND THE MASSACHUSETTS NATIONAL GUARD APRIL, 1975 ------- CONTENTS Page Foreword i i List of Massachusetts Study Lakes iv Lake and Drainage Area Map v Sections I. Conclusions 1 II. Lake and Drainage Basin Characteristics 3 III. Lake Water Quality Summary 4 IV. Nutrient Loadings 8 V. Literature Reviewed 13 VI. Appendices 14 ------- 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 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)L clean lakes [§314(a,bj], and water quality monitoring [§106 and §305(b)] activities mandated by the Federal Water Pollution Control Act Amendments of 1972. ------- 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. ------- IV NATIONAL EUTROPHICATION SURVEY STUDY LAKES STATE OF MASSACHUSETTS LAKE NAME Assabet-Concord River Impoundments Northboro Hudson Maynard Bill erica Hager Pond Matfield Impoundment Rochdale Pond Woods Pond COUNTY Worcester Middlesex Middlesex Middlesex Middlesex Plymouth Worcester Berkshire ------- WOODS POND ® Tributary Sampling Site x Lake Sampling Site Sewage Treatment Plant Industrial Discharge Direct Drainage Area Limits Indirect Drainage Area ! 2 ?Mi ------- WOODS POND STORE! NO. 2507 I. CONCLUSIONS A. Trophic Condition: Survey data indicate that Woods Pond is a hypereutrophic impoundment which receives heavy loads of phosphorus from muni- cipal and industrial sources. Heavy algal blooms and broad surface coverage by duckweed are recurrent phenomena. High algal assay control yields substantiate the high primary productivity reported. Turbidity was high and dissolved oxygen was depressed when sampled. B. Rate-Limiting Nutrient: Algal assay results indicate that Woods Pond was nitrogen limited at the time the sample was collected. The ratio of inor- ganic nitrogen to dissolved phosphorus (approximately 3 to 1 on each sampling date) indicates that nitrogen limitation is a sustained rather than a transient condition in the pond. C. Nutrient Controllability: 1. Point sources—During the sampling year, Woods Pond received a total phosphorus load at a rate more than 60 times that proposed by Vollenweider (in press) as "dangerous"; i.e., a eutrophic rate (see page 12). Now, Vollenweider's model probably does not apply to water bodies with short detention ------- times, and the mean hydraulic retention time of Woods Pond is a very short 19 hours. Nonetheless, the existing trophic condi- tion of the pond is evidence of excessive nutrient loads. It is estimated that the point sources considered in this study collectively contributed over 93% of the total phosphorus load. While even complete removal of phosphorus at these sources would still leave a loading rate nearly four times the eutrophic rate, considering the very short hydraulic retention time of Woods Pond and the probability that Vollenweider's model is not applicable, it is likely that a high degree of phosphorus removal at the point sources would result in a decrease in the incidence and severity of nuisance algal blooms as well as reduce the phosphorus loading to downstream Housatonic River impoundments. 2. Non-point sources—The estimated non-point phosphorus 2 export rate of the Housatonic River of 107 Ibs/mi /yr is comparable to the export rates of Massachusetts streams studied elsewhere; e.g., Hager Pond and Rochdale Pond tributaries. In all, it is estimated that non-point sources, including pre- cipitation, contributed a little over 7% of the total phosphorus load to Woods Pond during the sampling year. ------- II. LAKE AND DRAINAGE BASIN CHARACTERISTICS A. Lake Morphometry : 1. Surface area: 122 acres. 2. Mean depth: 4 feet. 3. Maximum depth: 15 feet. 4. Volume: 488 acre-feet. 5. Mean hydraulic retention time: 19 hours. B. Tributary and Outlet: (See Appendix A for flow data) 1. Tributaries - Name Drainage area* Mean flow* Housatonic River 147.0 mi2 266.9 cfs Minor tributaries & 2 immediate drainage - 24.8 mi 45.5 cfs Totals 171.8 mi2 312.4 cfs 2. Outlet - Housatonic River 172.0 mi2** 312.4 cfs C. Precipitation***: 1. Year of sampling: 53.7 inches. 2. Mean annual: 42.0 inches. t Chesebrough, 1975. * 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%. ** Includes area of lake. *** See Working Paper No. 1, "Survey Methods, 1972". ------- III. LAKE WATER QUALITY SUMMARY Woods 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 a number of depths at the single station on the pond (see map, page v). During each visit, a depth-integrated (near bottom to surface) sample was collected for phyto- plankton identification and enumeration, and a similar sample was collected for chlorophyll ^analysis. During the last visit, a single five-gallon depth-integrated sample was collected for algal assays. The maximum depth sampled was four feet. The results obtained are presented in full in Appendix B, and the data for the fall sampling period, when the pond essentially was 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. ------- A. Physical and chemical characteristics: Parameter Minimum Temperature (Cent.)* Dissolved oxygen (mg/1)* Conductivity (ymhos) 250 pH (units) 7.3 Alkalinity (mg/1) 79 Total P (mg/1) 0.309 Dissolved P (mg/1) 0.238 N0? + NO, (mg/1) 0.440 Ammonia fmg/1) 0.700 Seechi disc (inches) 24 FALL VALUES (10/08/72) Mean Median 250 7.3 79 0.309 0.238 0.440 0.700 250 7.3 79 0.309 0.238 0.440 0.700 ALL VALUES 43 36 Maximum 250 7.3 79 0.309 0.238 0.440 0.700 68 * These parameters were not measured in October. ------- B. Biological characteristics: 1. Phytoplankton * _ Sampling Date 06/05/72 08/01/72 Chlorophyll (Because of the followi Sampling Date 06/05/72 08/01/72 10/08/72 Dominant Genera 1 . Asterionella 2. Navicula 3. Fragilaria 4. Dinobryon 5. Synedra Other genera Total 1 . Flagellates 2. Anabaena 3. Dinobryon 4. Cyclotella 5. Synedra Other genera Total a_ - instrumentation problems during ng values may be in error by plus Station Number 01 01 01 Number per ml 470 265 90 72 72 429 1,398 3,002 778 651 380 325 1,121 6,257 the 1972 sampling, or minus 20 percent.) Chlorophyll a (yg/1) 3.2 12.1 19.0 * The October sample was lost in shipment. ------- 0.230 0.236 0.242 0.254 0.290 0.290 0.230 0.950 0.950 0.950 0.950 0.950 10.950 10.950 41.8 45.2 45.6 43.7 37.0 64.4 61.6 C. Limiting Nutrient Study: 1. 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 2. Discussion - The control yield of the assay alga, Selenastrum capri- cornutum, indicates that the primary productivity in Woods Pond was very high at the time the assay sample was col- lected. The lack of significant increases in yield with increasing levels of phosphorus spikes, until nitrogen was also added, indicates that nitrogen was the limiting nutrient. Note that there was a significant increase in yield (compared to the control yield) when only nitrogen was added. The pond data indicate nitrogen limitation at the other sampling times as well (N/P ratios were less than 3/1, and nitrogen limitation would be expected). ------- IV. 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 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 September, 1972, and was completed in October, 1973. Through an interagency agreement, stream flow estimates for the year of sampling and a "normalized" or averaged year were provided by the New England District Office of the U.S. Geological Survey for the tribu- tary sites nearest the lake. In this report, the nutrient loads of the outlet at station A-3 were calculated using the mean concentrations and the mean annual flow. However, the phosphorus loads calculated in this way for the Housatonic River inlet at station A-2 were less than the sum of the upstream point-source loads, so the background phosphorus load of the river was estimated using the mean annual flow at station A-2 and the mean of the phosphorus concentrations measured in 1974 in the East and West1 branches of the Housatonic River (0.030 mg/1) by the Massachusetts Division of Water Pollution Control (Anonymous, 1974). The nitrogen load for unsampled "minor tributaries and immediate drain- age" ("ZZ" of U.S.G.S.) was estimated by using the adjusted (minus point ------- 2 source) Housatonic River load, at station A-2, in Ibs/mi /year, and 2 multiplying by the ZZ area in mi . The ZZ phosphorus load was calcu- lated using the mean phosphorus concentrations as at station A-2 and the mean annual ZZ flow. The operator of the Pittsfield wastewater treatment plant provided monthly effluent samples and corresponding flow data. However, the North Lennox wastewater treatment plant and the General Electric Company discharges were not sampled, and the nutrient loads attributed to these sources were provided by the Massachusetts Division of Water Pollution Control (Chesebrough, 1975; Cooperman, et al., 1971). It is assumed that the entire point-source nutrient loads reached Woods Pond during the sampling year. A. Waste Sources: 1. Known municipal - Name Pittsfield North Lennox 2. Industrial** - Pop. Served 55,000 2,350* Mean Receiving Treatment Flow (mgd) Water trickling filter, sand filter prim. clarifier prim. clarifier 7.000 1.500 2.452 0.152 Housatonic River Housatonic Mean Name General Electric Co. Receiving Product Treatment Flow (mgd) Water none 4.100 E. Branch, Housatonic River t Chesebrough, 1975. * Includes seasonal residents. ** Cooperman, et al., 1971. ------- 10 B. Annual Total Phosphorus Loading - Average Year: 1. Inputs - Ibs P/ % of Source y_r total a. Tributaries (non-point load) - Housatonic River 15,765 5.4 b. Minor tributaries & immediate drainage (non-point load) - 2,690 0.9 c. Known muncipal STP's - Pittsfield 134,560 46.3 North Lennox 2,560 0.9 d. Septic tanks - Unknown e. Known industrial - General Electric Company* 135,000 46.5 f. Direct precipitation** - 20^ <0.1 Total 290,595 100.0 2. Outputs - Pond outlet - Housatonic River 221,760 3. Net annual P accumulation - 68,835 pounds * Cooperman, et al., 1971. ** See Working Paper No. 1. ------- 11 C. Annual Total Nitrogen Loading - Average Year: 1. Inputs - Ibs N/ % of Source y_r total a. Tributaries (non-point load) - Housatonic River 741,390 49.4 b. Minor tributaries & immediate drainage (non-point load) - 125,080 8.3 c. Known municipal STP's - Pittsfield 620,350 41.4 North Lennox 11,680T 0.8 d. Septic tanks - Unknown e. Known industrial - General Electric Company* insignificant f. Direct precipitation** - 1.180 0.1 Total 1,499,680 100.0 2. Outputs - Pond outlet - Housatonic River 2,072,450 3. Net annual N loss - 572,770 pounds D. Mean Annual Non-point Nutrient Export by Subdrainage Area: 2 2 Tributary Ibs P/mi /yr Ibs N/mi /yr Housatonic River (estimated) 107 5,043 t Total Kjeldahl nitrogen only. * Cooperman, et al., 1971. ** See Working Paper No. 1. ------- 12 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 waters 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 Units Ibs/acre/yr grams/m2/yr Total 2,381. 266. 9 98 Accumulated 564.2 63.24 12 1 Total ,292. ,377. 5 8 Accumulated loss* o Vollenweider loading rates for phosphorus (g/m /yr) based on mean depth and mean hydraulic retention time of Woods Pond: "Dangerous" (eutrophic rate) 4.40 "Permissible" (oligotrophic rate) 2.20 * There was an apparent loss of nitrogen during the sampling year. This may have been due to nitrogen fixation in the pond, solubilization of previously sedimented nitrogen, recharge with nitrogen-rich ground water, unknown and unsampled point sources discharging directly to the pond, or underestimation of the nitrogen loads from Pittsfield, North Lennox, and/or the General Electric Co. discharges. Whatever the cause, a similar nitrogen loss has occurred at Shagawa Lake, Minnesota, which has been intensively studied by EPA's National Eutrophication and Lake Restoration Branch. ------- 13 V. LITERATURE REVIEWED Chesebrough, Eben W., 1975. Personal communication (review of preliminary report on Woods Pond). MA Div. Water Poll. Contr., Westborough. Cooperman, A. N., R. A. Isaac, and W. R. Jobin, 1971. The Housatonic River, 1969 - Part C. MA Div. Water Poll. Contr., Boston. Vollenweider, Richard A., (in press). Input-output models. Schweiz. Z. Hydrol. ------- VII. APPENDICES APPENDIX A TRIBUTARY FLOW DATA ------- TRIBUTARY FLOW INFORMATION FOR MASSACHUSETTS 11/26/74 LAKE CODE 2507 WOODS POND TOTAL DRAINAGE AREA OF LAKE 172.00 SUB-DRAINAGE TRIBUTARY AREA JAN FEB 2507A? 2507A3 2507ZZ 147.00 172.00 25.00 257.00 238.00 301.00 279.00 43.SO 40.50 MAR 475.00 556.00 80.RO APR 673.00 788.00 115.00 MAY 344.00 402.00 58.50 NORMALIZED FLOWS JUN JUL AUG 201.00 236.00 34.30 140.00 164.00 23.90 117.00 137.00 20.00 SEP 140.00 164.00 23.80 OCT 135.00 158.00 22.90 NOV 235.00 275.00 40.00 DEC MEAN 251.00 266.91 294.00 312.53 42.80 45.48 SUMMARY TOTAL DRAINAGE AREA OF LAKE = SUM OF SUB-DRAINAGE AREAS = 172.00 172.00 TOTAL FLOW IN TOTAL FLOW OUT 37S2.30 3754.00 MEAN MONTHLY FLOWS AND DAILY FLOWS TRIBUTARY MONTH YEAR MEAN FLOW DAY 2507A2 2507A3 2S07ZZ 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 A 9 10 11 12 1 ? 3 4 5 6 7 8 7? 72 72 72 73 73 73 73 73 73 73 73 72 72 72 72 73 73 73 73 73 73 73 73 72 72 72 72 73 73 73 73 73 73 73 73 FLOW DAY FLOW DAY FLOW 82.00 134.00 385.00 575.00 532.00 493.00 598.00 513.00 468.00 203.00 148.00 214.00 96.10 157.00 451.00 673.00 623.00 578.00 701.00 600.00 547.00 238.00 174.00 251.00 13.90 22.70 65.60 98.00 90.70 83.80 102.00 87.60 79.60 34.70 25.30 36.60 9 21 18 16 21 3 4 7 20 10 19 9 21 18 16 21 3 4 7 20 10 19 69.80 108.00 318.00 551.00 641.00 1564.00 363.00 17 437.00 30 704.00 176.00 207.00 81.70 126.00 372.00 645.00 750.00 1830.00 425.00 17 511.00 30 824.00 206.00 242.00 829.00 420.00 970.00 492.00 ------- APPENDIX B PHYSICAL and CHEMICAL DATA ------- STORET RETRIEVAL DATE 74/11/36 250701 42 21 00.0 073 14 30.0 WOODS POND 25 MASSACHUSETTS 11EPALES 4 2111202 0006 FEET DEPTH DATE TIME DEPTH FROM OF TO DAY FEET 72/06/05 10 40 0000 72/08/01 09 50 0000 09 50 0004 72/10/08 15 35 0000 00010 WATER TEMP CENT 18.4 19.4 00300 00077 DO TRANSP CN SECCHI FIELD MG/L INCHES M] 6.6 5.0 36 68 24 94 TVY MHO 220 340 340 250 00400 PH su 7.50 7.10 7.10 7.35 00410 T ALK CAC03 MG/L 96 128 124 79 00630 N02&N03 N-TOTAL MG/L 0.370 0.870 0.830 0.440 00610 NH3-N TOTAL MG/L 0.380 0.870 0.850 0.700 00665 PHOS-TOT MG/L P 0.165 0.439 0.417 0.309 00666 PHOS-DIS MG/L P 0.133 0.353 0.327 0.238 DATE TIME DEPTH CHLRPHYL FROM OF A TO DAY FEET 72/06/05 10 40 0000 72/08/01 09 50 0000 72/10/08 15 35 0000 UG/L 3.?J 12 . 1J 19.OJ J VALUE KNOWN TO BE IN ERROR ------- APPENDIX C TRIBUTARY and WASTEWATER TREATMENT PLANT DATA ------- STORE! RETRIEVAL DATE 74/11/26 2507A1 LS2507A1 42 26 00.0 073 14 00.0 25 705 E PITTSFIELO I /WOODS PONO HOLMES RD BROG ABOV PITTSFISLD STP 11EPALES 2111204 4 0000 FEET DEPTH OATE FROM TO 72/09/09 72/10/21 72/12/16 73/01/21 73/02/03 73/03/04 73/03/17 73/04/07 73/04/30 73/05/20 73/06/10 73/08/19 00630 00625 TIME DEPTH N02&N03 TOT KJEL OF N-TOTAL. N DAY FF£T 10 12 09 09 09 10 13 09 10 09 09 09 10 45 45 00 30 45 30 30 10 20 00 00 MG/L 0 0 0 0 0 0 0 0 0 0 0 0 .310 .380 .336 .440 .290 .340 .260 .280 .273 .130 .200 .270 MG/l. 1. 1. 2. 1. 1. 0. ?.. 3. 2. 1. 2. 3. 800 000 100 600 100 840 520 900 100 890 100 500 C0610 00671 00665 NH3-N PHOS-DIS PHOS-TOT TOTAL ORTHO MG/L 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 430 138 130 126 077 126 115 680 170 071 650 189 MG/L 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. P 280 490 008 010 014 008 00ft 012 013 009 015 033 MG/L P 0.490 1.200 0.025 0.035 0.115 0.090 0.065 0.040 0.055 0.040 0.055 0.085 ------- STORET RETRIEVAL DATE 74/11/26 2507A2 LS2507A2 42 23 30.0 073 14 30.0 HOUSATONIC RIVER 25 7.5 E PITTSFIELO I/WOODS POND NEW LENOX HD 0RDG BELO PITTSFIELO STP 11EPALES 2111204 4 0000 FEET DEPTH DATE FROM TO 72/09/09 72/10/21 72/11/1H 72/12/16 73/01/21 73/02/03 73/03/04 73/03/17 73/04/07 73/04/30 73/05/20 73/06/10 73/08/19 00630 00625 TIME DEPTH N02S.N03 TOT KJEL OF N-TOTAL N DAY FEET MG/L MG/L 10 13 13 10 09 09 10 14 09 10 09 09 09 25 ' 00 55 00 20 50 55 00 50 30 35 20 15 U 0 0 0 0 0 0 0 0 0 0 0 0 .019K .710 .375 .520 .550 .320 .440 .336 .430 .590 .200 .640 .620 3. 1. 3. 1. 0. 1. 0. 0. 2. 2. 3. 3. 1. 100 650 400 600 810 700 800 650 520 600 650 360 700 00610 00671 00665 NH3-N PHOS-DIS PHOS-TOT TOTAL ORTHO MG/L MG/L P MG/L P 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 1. 0. 590 275 310 260 180 252 110 530 670 210 160 399 1 C 0 0 0 0 0 0 0 0 0 0 0 .100 .135 .147 .105 .075 .050 .078 .030 .290 .210 .088 .340 .240 1.370 0.930 0.294 0.180 0.165 0.220 0.150 0.090 0.470 0.315 0.170 0.480 0.375 ------- STORE! RETRIEVAL DATE 74/11/26 2507A3 LS2507A3 4? 20 00.0 073 15 00.0 HOUSATONIC RIVER 25 7.5 E LEE O/WOOOS POND EAST ST BROG NEAR LENOX UALE 11EPALES 2111204 4 0000 FEET DEPTH DATE FROM TO 7?/09/00 72/10/21 72/12/16 73/01/21 73/02/03 73/03/04 73/03/17 73/04/07 73/04/30 73/05/20 73/06/10 73/08/19 00630 00625 TIME DEPTH N02&N03 TOT KJEL OF N-TOTAL N DAY FEET 10 13 10 09 10 11 14 10 09 09 09 09 45 30 15 35 10 10 30 15 50 50 45 30 MG/L 1 0 0 0 0 0 0 0 0 0 0 0 .240 .620 .500 .500 .320 .480 .330 .370 .600 .198 .640 .610 MG/L 1. 1. 2. 2. 2. 1. 1. 3. 4. 3. 4. 4. 450 400 500 650 400 050 890 550 000 500 950 200 00610 00671 00665 NH3-N PHOS-DIS PHOS-TOT TOTAL ORTHO MG/L 0. 0. 0. C. 0. 0. 0. 0. 0. 0. 0. 0. 430 520 315 390 270 360 190 420 550 231 640 370 MG/L 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. p 640 336 180 084 052 130 060 105 189 105 378 300 MG/L P 0.910 0.450 0.27Q 0.210 0.210 0.210 0.230 0.1«5 0.375 0.210 0.525 0.460 ------- STORET RETRIEVAL DATE 74/11/27 250750 TF250750 P055000 42 24 30.0 073 14 30.0 PITTSFIELD , 25 7.5 PITTSFIELD E T/WOODS POND HOUSATONIC KIVER 11EPALES 2141204 4 0000 FEET DEPTH 00630 00625 DATE TIME DEPTH NO?fiN03 TOT KJEL FttOM TO OF N-TOTAL DAY FEET MG/L 72/11/24 08 00 CP(T)- 72/11/24 19 00 72/12/29 Ofl 00 CPIT1- 72/12/29 19 00 73/01/24 09 00 CP(T>- 73/01/24 ?0 00 73/02/21 08 00 CPU1- v 73/02/21 19 00 73/03/2? 09 00 CP(T>- 73/03/2? 20 00 73/04/26 09 00 CP(T)- 73/04/26 20 00 73/05/24 09 00 CP(T)- 73/05/24 20 00 73/06/21 '09 00 CP(T)- 73/06/21 20 00 73/07/26 08 30 CPITI- 73/07/26 19 30 73/08/29 09 00 CP(T)- 73/08/29 20 00 73/09/27 09 00 CPITI- 73/09/27 20 00 73/10/30 09 00 CPITl- 73/10/30 20 00 4.100 6.100 5.300 N MG/L 8.500 11.000 00610 00671 00665 50051 50053 NH3-N PHOS-OIS PHOS-TOT FLOW CONDUIT TOTAL OP.THO RATE FLOW-MGD MG/L MG/L P MG/L P INST MOD MONTHLY 5.100 11.000 4.800 10.000 7.800 2.^00 0.380 0.460 10.700 2.000 3.700 4.400 9.840 0.069 2.600 3.500 11.600 13.100 0.560 2.600 3.450 14.200 13.200 9.790 12.600 0.510 2.200 2.900 13.100 12.300 6.500 4.600 7.200 7.500 7.?00 5.300 12.000 13.000 13.000 23.000 14. COO 19.JOO 17.000 2.ROO 1.700 1.940 ?.?00 3.100 4.000 3.300 3.400 3.625 3.700 3.600 4.200 4.200 4.200 4.100 4.600 4.600 4.600 5.700 6.100 10.500 12.100 9.790 8.770 10.500 fl.310 *.720 12.600 11.100 10.600 10.900 11.100 8.930 7.960 ------- STORE! RETRIEVAL DATE 74/l]/?7 250750 TF250750 P055000 4? 24 30.0 073 14 30.0 PITTSFIELO 25 7.5 PITTSFIELD E T/WOODS POND HOUSATONIC RIVER 11EPALES 21<»1204 * 0000 FEET DEPTH DATE FROM TO TIME OF DAY DEPTH FEET 00*30 00625 NO.?fA'03 TOT KJFL N-TOTAL N MG/L ^G/L 00610 MH3-N TOTAL MG/L 00671 PriOS-OIS 00665 PHOS-TOT OPTHO MG/L P MG/L P 50051 FLOW RATE INST MGO 50053 CONDUIT FLOW-MOD MONTHLY 73/11/2P OQ 00 CP(T>- 73/11/28 20 00 3.800 17.500 5.400 3.570 S.200 9.160 H.150 ------- |