Baseline Lake Survey 2001 Technical Memo

Division of Watershed Management Department of Environmental Protection 627 Main Street, Second Floor Worcester, MA

1 Baseline Lake Survey 2001 Technical Memo

Prepared by Mark D. Mattson, PhD Survey Coordinator and Albelee Haque

TM-S-16 DWM Control Number CN 167.0 September 23, 2004

Massachusetts Department of Environmental Protection Division of Watershed Management Worcester, MA

2 Table of Contents

Introduction...... 5 Methods...... 8 Table 1 Analytical Services ...... 10 Results ...... 13 Table 3. Hydrolab data Baseline Lake Monitoring, 2001 (QC Status: 4) ...... 88 Table 4. Water Quality Data. Baseline Lake Monitoring, 2001 (QC Status: 4) ...... 97 Table 5. TMDL Baseline Lake Monitoring, Equipment Blanks 2001 (QC Status: 4) ...... 117 Table 6. TMDL Baseline Lake Monitoring, Field Duplicates 2001 (QC Status: 4) ...... 119 References...... 124 Appendix I. Macrophyte Species Codes...... 125

List of Figures

Figure 1. Congamond Lakes Depth Map...... 18 Figure 2. Congamond Lakes Species Distribution Map...... 19 Figure 3. Congamond Lakes Percent Biovolume Map...... 20 Figure 4. Congamond Lakes Macrophyte Density Map...... 21 Figure 5. Monponsett Pond East and West Depth Maps...... 23 Figure 6. Monponsett Pond West Macrophyte Percent Cover Map...... 24 Figure 7. Monponsett Pond West Macrophyte Percent Biovolume Map...... 25 Figure 8. Monponsett Pond West Species Distribution Map...... 26 Figure 9. Monponsett Pond East Macrophyte Percent Biovolume Map...... 27 Figure 10. Monponsett Pond East Macrophyte Percent Cover Map...... 28 Figure 11. Monponsett Pond East Species Distribution Map...... 29 Figure 12. Lake Sabbatia Depth Map...... 31 Figure 13. Lake Sabbatia Macrophyte Percent Biovolume Map...... 32 Figure 14. Lake Sabbatia Macrophyte Density Map...... 33 Figure 15. Lake Sabbatia Species Distribution Map...... 34 Figure 16. Watson Pond depth Map...... 35 Figure 17. Watson Pond Macrophyte Percent Biovolume Map...... 36 Figure 18. Watson Pond Macrophyte density Map...... 37 Figure 19. Watson Pond Species Distribution Map...... 38 Figure 20. Assabet River Reservoir Depth Map...... 40 Figure 21. Assabet River Reservoir Percent Biovolume Map...... 41 Figure 22. Assabet River Reservoir Percent Cover Map...... 42 Figure 23. Assabet River Reservoir Species Distribution Map...... 43 Figure 24. White Hall Reservoir Depth Map...... 44 Figure 25. Whitehall Reservoir Percent Biovolume Map...... 45 Figure 26. Whitehall Reservoir Percent Cover Map...... 46 Figure 27. Whitehall Reservoir Species Distribution Map...... 47 Figure 28. Forge Pond Depth Map...... 48 Figure 29. Forge Pond Percent Biovolume Map...... 49 Figure 30. Forge Pond Percent Cover Map...... 50 Figure 31. Forge Pond Species Distribution Map...... 51

3 Figure 32. Lower Chandler Pond Depth Map...... 52 Figure 33. Lower Chandler Pond Percent Biovolume Map...... 53 Figure 34. Lower Chandler Pond Percent Cover Map...... 54 Figure 35. Lower Chandler Pond Species Distribution Map...... 55 Figure 36. Musquashcut Pond Percent Biovolume Map...... 57 Figure 37. Musquashcut Pond Percent Cover Map...... 58 Figure 38. Musquashcut Pond Species Distribution Map...... 59 Figure 39. Old Oaken Bucket Pond Depth Map...... 60 Figure 40. Old Oaken Bucket Pond Percent Biovolume Map...... 61 Figure 41. Old Oaken Bucket Pond Percent Cover Map...... 62 Figure 42. Old Oaken Bucket Pond Species Distribution Map...... 63 Figure 43. Wampatuck Pond Percent Biovolume Map...... 65 Figure 44. Wampatuck Pond Percent Cover Map...... 66 Figure 45. Wampatuck Pond Species Distribution Map...... 67 Figure 46. Ames Long Pond Depth Map...... 68 Figure 47. Ames Long Pond Species Map...... 69 Figure 48. Ames Long Pond Macrophyte Density Map...... 70 Figure 49. Farm Pond Depth Map...... 72 Figure 50. Farm Pond Macrophyte Species Map...... 73 Figure 51. Farm Pond Macrophyte Density Map...... 74 Figure 52. Farm Pond Macrophyte Biovolume Map...... 75 Figure 53. Heard Pond Depth Map...... 76 Figure 54. Heard Pond Macrophyte Species Map...... 77 Figure 55. Heard Pond Macrophyte Density Map...... 78 Figure 56. Heard Pond Macrophyte Biovolume Map...... 79 Figure 57. Willis Pond Depth Map...... 80 Figure 58. Willis Pond Macrophyte Species Map...... 81 Figure 59. Willis Pond Macrophyte Density Map...... 82 Figure 60. Willis Pond Macrophyte Biovolume Map...... 83 Figure 61. Jacobs Pond Depth Map...... 84 Figure 62. Jacobs Pond Macrophyte Species Map...... 85 Figure 63. Jacobs Pond Macrophyte Density Map...... 86 Figure 64. Jacobs Pond Macrophyte Biovolume Map...... 87

4 Introduction Comment: This section of the QAPP identifies the organizations, team members and other key personnel participating in the project and describes their specific roles, responsibilities and Baseline lake surveys are performed to provide information on the current chemical, biological qualifications. This section also provides and physical conditions or a lake system (i.e., in-lake and watershed) in order to evaluate the an explanation of the lines of authority, reporting relationships and trophic state of the lake and in some cases, identifying major NPS pollution sources. These data communication paths. Change are used to support TMDL reports, particularly, the verification of total phosphorus organization as author deems appropriate. concentrations in the lakes. Additional sites and analyses may be added in response to a special request or a preliminary review of available site information. Data generated from these baseline surveys are evaluated for the degree of support of the designated uses of the lake in the Summary of Water Quality (305b Report).

In addition to the above overall objectives, the Baseline lake sampling for the year 2001 will be coordinating a cooperative sampling program with the Massachusetts Division of Fisheries and Wildlife (DFW) under a grant from DEP entitled "Lake Surveys for TMDL Development Project #99-06/104", hereafter referred to as the DFW survey (DFW, 2001). The goals of the DFW survey are to conduct a fisheries and macrophyte survey of lakes in Massachusetts and to establish a relationship, if possible, between fish and plant populations, and to assist DWM in collecting water quality samples for TMDL purposes. The fish collection and analysis portions of the project will be written under a separate QAPP by DFW (DFW, 2001). DFW will use the aquatic plant and water quality field collections SOPs described here to collect field data and field samples. The water samples will be turned over to DEP for laboratory analysis. A final report is available from DFW (Hartley, 2002). Data collected may be used to help support other programs including the 305b assessment program. Waters are assessed for support of specific designated uses that include: Aquatic life; Swimming; Fish Consumption; Secondary Contact Recreation; and Aesthetics.

Sampling was essentially unchanged from the 2000 survey (DWM, 2000). Sampling included water quality, sediment samples and aquatic plant mapping for each lake. The sediment data will be related to internal sources of phosphorus determined from the difference between measured and modeled lake TP and changes in lake TP over time. The iron to phosphorus ratio in sediments may be related to sediment release of phosphorus in lakes.

A subset of lakes from the Taunton and South Coastal watersheds will be examined for impacts related to commercial cranberry operations. Some additional samples will be taken from the major inlets to these lakes, with notes on presence or absence of cranberry operations upstream of those tributaries.

Statistical sampling was not conducted. Instead, lake sampling was targeted on the 1998 Massachusetts 303d list, with the following restrictions and exceptions. The lakes selected for sampling were targeted based on the Five-year Rotating Basin Cycle. For the 2001 sample season the “green” basins were targeted, which include the Farmington, Westfield, Concord,

5 Taunton and South Coastal basins, are scheduled for sampling. Additional sampling includes Fish Contaminant Monitoring Program, water quality monitoring on selected lakes and rivers and macroinvertebrate sampling in various streams and possibly DEP compliance monitoring for NPDES permits.

Due to staff limitations and laboratory limitations, only 18 lakes on the 303d list were targeted for sampling (one of these Monponsett Pond East 62218) was not specifically listed on the 1998 303d list but was sampled because it is hydraulically connected to Monponsett Pond West 62119 which was listed). Of these 12 were sampled by DWM and 6 were sampled by DFW. Lakes listed solely for non-nutrient related issues were not sampled in the Baseline Survey (ex. lakes listed for fish consumption advisories). Secondary selection criteria included the lack of a previous diagnostic/feasibility study (D/F lakes were not resampled), the severity of the problem, the size and public ownership of the lake and access (in some cases ponds within state forest lands with poor access were omitted from consideration). Finally, the types of impairments were used to target lakes for sampling. DWM lakes are primarily targeted to nutrient issues or algal blooms. Lakes targeted for the DFW survey were chosen to represent a range of percent cover of macrophytes between 10 and 100 percent cover, which had a boat ramp and which were of medium size between 30 and 130 acres and which are open to fishing.

6 Figure 5.1 Proj ect Area Maps and Approximate Locations of Lakes Comment: Provide a good site map showing watershed, river reach, etc as approp. for orientation, then use Figure 2 Westfield Basin: Concord Basin: for more specific station locations….

Congamond Lakes Assabet R. Res, Whitehall Res., Farm Pond, Heard Pd. Willis Pd.

South Coastal Basin (northern half): Taunton Basin:

COHA SSE T

HINGHAM SC IT UATE Y MOUTH

NORWEL L

ROC KLAND HANOVER MARSHFI ELD TON

PEMBROKE HANSON DUXBURY

Forge, Jacobs, Old Oaken Bucket Ames Long Pond, West Meadow Pd Wampatuck L. Chandler, Musquashcut, Watson and Sabbatia Lakes, Monponsett Ponds,

7 Methods

A Quality Assurance Project Plan (QAPP) was written and approved by DEP (MA DEP CN 65.0). There were some lake substitutions made after the QAPP was approved to address DFW concerns as noted below. All methods and complete Standard Operating Procedures are included in the QAPP and are available from DEP. Brief overviews of the methods are included below.

Sampling was conducted in 2 suites (Water quality and Macrophyte Mapping):

Water quality suite (once per month during June/July, July/August and August/September): Water quality sampling was conducted at one site in the deepest section of the lake. For large multibasin lakes such as Congamond, additional samples were taken from the surface at the center of the other basins to characterize spatial variability. At each station Secchi disk transparency and field notes were taken along with profiles of Hydrolab measurements of DO, percent saturation, temperature, pH, conductivity, total dissolved solids (roughly estimated from conductivity). Water samples for nutrients (Total Phosphorus) and chemistry (alkalinity and apparent color) were collected at the surface at approximately 0.5 m depth and near the bottom at 0.5 m off the sediments. In one case, a coastal saltwater pond, Musquashcut Pond, was judged to be nitrogen sensitive and nitrate and organic N samples were taken with field filtering (0.45u membrane filters provided by SMAST) as needed and samples delivered the same day to Umass Dartmouth SMAST lab for analysis. Photic zone (3x Secchi disk depth) chlorophyll a samples will be taken with the aid of a weighted hose (see SOP). Six types of water samples were taken: 1)Integrated Chlorophyll a 2)TP 3)Alkalinity 4) Apparent color 5)A grab sample for algae identification will be taken when blooms are observed. 6) Surface samples for nitrogen were taken at Musquashcut Pond and the inlet to Musquashcut. In addition, the Survey Coordinator collected a single round of sediment samples. One composite sample from three representative sites in shallow water sediments between 3 and the deepest point (but no deeper than 15 feet) were taken at equally spaced depth intervals (ex. 5, 10 and 15 feet).

Macrophyte suite (once in late summer between June 15-Sept. 15): A map of the lake and the immediate shoreline was printed on 81/2 by 11 inch paper from the MassGIS USGS images for macrophyte percent cover mapping. Two or more sheets were used for large, multi-basin lakes. A second copy of the map was printed for percent biovolume of macrophytes. A third copy was used for species distribution mapping. A fourth copy was used to indicate sampling locations and locations of housing development, NPS pollution or other environmental information as needed. A scale bar is included in the printed maps. Non-destructive estimates of percent cover and species distribution were mapped and information on species occurrence and overall dominant species noted along with notes on presence of non-native species (see CN 65).

8 Lake assessment of designated uses were recorded along with shoreline habitat notes on the new field sheets.

Samples were analyzed for the parameters identified in Table 8C. Every parameter is designated by a specific bottle group designation. Table 8C lists the project’s water quality analytes by location and provides information on bottle type, preservative and holding times. The complete listing of sampling analyte bottle groups is contained in CN 1.1 Surface Collection Techniques for DWM Water Quality Sampling.

Water quality samples were stored in a cooler at 4C. Samples for Total Phosphorus were preserved with sulfuric acid to pH<2 and kept at 4C. Samples were transported back to both WES and DWM laboratories for final analysis. A chain of custody was maintained for the samples. The analysis methods for each analyte are listed in Table 1 below:

9 TABLE 1 Analytical Services. The following laboratories/organizations provided analytical services. Table 1 Analytical Services

Concentration Approx. Data Medium/ Analytical Analytical Method/ Laboratory/Organization (Name and Level (Low / Package Turnaround Matrix Parameter SOP reference Contact Person and Telephone No.) High) Time

DWM Field Lab DO, pH, Cond, Next day for draft 627 Main St. Worc., Ma. Surface temperature, NA; in-situ Low data; approx. 21 days (508) 767-2859 water turbidity, % Hydrolab (CN 4.1) for final data Contacts: Jeff Smith, Richard Chase, T saturation, Dallaire Division of Environmental Analysis TP, Low Total Phosphorus Next day-30 days for Senator William X. Wall Experiment Sta Surface SM4500P-E draft data; approx. 7 37 Shattuck Street , Lawrence, MA 0184 water Alkalinity (titrimetric) ALK Low SM2320B 45 days for final data (978) 682-5237 Contact: Kenneth Hulme High TP, Persulfate digestion USGS I-6600-85 in TFe, (USGS, 1989). Sediments High 4 months WES, see above EPA 3050B %Solids, EPA 200.7 % Organic SM 2540D Variable

Surface Fluorometric EPA 24 hours /frozen 21 Chlorophyll a Low Joan Beskenis, DWM, see above water 445, SOP CN 3.2 days

Surface Hach color wheel, Apparent color Low 48 hours Mark Mattson, DWM, see above water Color SOP CN 2.0

TN SM4500 SMAST Lab Surface - NO3 filtered Low SM4500P-E 6 months Umass, Dartmouth, MA water + NH4 filtered SM4500NH3-F Contact Brian Howes

10 The 2001 Baseline lake survey was changed somewhat from the original QAPP. At the request of DFW, several lakes were dropped and others substituted for the lakes to be sampled by DFW. A total of 18 lakes were sampled. Twelve were sampled 3x by DWM, six were sampled 3x by DFW. A list of the lakes sampled with the OWMID sampling code numbers is shown in Table 2 below.

11 TABLE 2 List of Lakes and OWMID Sample Codes for Bottles.

OWMID=LBxxxx from Table below Palis WBNAME TOWN SIZE TP Round 1 Round 2 Round 3 Acres Samples June/July July/Aug Aug/Sept.

32021 Congamond Lakes, Southwick 267 3 1201 1294 1387 begin Middle 32022 Congamond Lakes, Southwick 48 2 1214 1307 1400 end North

94105 Musquashcut Pond Scituate 71 3 1215 1308 1401 begin 94113 Old Oaken Bucket Scituate 12 2 1228 1321 1414 end Pond

62166 Lake Sabbatia Taunton 237 3 1229 1322 1415 begin 62205 Watson Pond Taunton 94 2 1242 1335 1428 end

62119 Monponsett Pond, Halifax 276 6 1243 1336 1429 begin West 62218 Monponsett Pond, Halifax 246 4 1261 1354 1447 end East

82004 Assabet River Westborough 333 3 1262 1355 1448 begin Reservoir A-1 82120 Whitehall Res. Hopkinton 575 3 1276 1369 1462 end

94091 Lower Chandler Duxbury 30 3 1277 1370 1463 begin Pond 94168 Wampatuck Pond Hanson 64 5 1293 1386 1479 end

94037 Forge Pond Hanover 20 5 1801-1812 1821-1832 1841-1852

DFW Lakes 1479 1521 1563

82058 Heard Pond Wayland 71 2 1480 1522 1564 begin 82122 Willis Pond Sudbury 68 2 1492 1534 1576 end

62001 Ames Long Pond Easton 65 2 1493 1535 1577 begin 94077 Jacobs Pond Norwell 59 2 1505 1547 1589 end

82035 Farm Pond Framingham 149 2 1506 1548 1590 begin 62208 West Meadow Pd W. Bridgewater 125 2 1521 1563 1605 end

12 The six DFW lakes were specially selected to provide a wide range of macrophyte cover to assist in testing the DFW project to determine the relationship between plant and fish densities

Results

QA/QC Results:

The Data Validation Report for the 2001 data (CN 149.0) gives details of the overall QA/QC and steps taken to validate the data. As in 2000, this year there were some problems with coordination and quality control with the DFW staff in sampling the six DFW lakes. Because DFW grant monies came from EPA, they were required to produce a QAPP prior to any sampling. Since they were acting as our agents and following our water sampling protocols, we decided to include DFW in our QAPP, with the exception that they would use their own Hydrolab and manually write down 3 replicate readings at each depth, but follow our calibration procedures. However, most of the daily Hydrolab calibration documentation was missing for the DFW data (with six days documented) and thus the undocumented data was censored (see CN 149.0).

Lab Audits : No lab audits for the lake analyses were conducted in 2001.

Field Blanks: Beginning in 2001 field equipment blanks for total phosphorus (TP) were collected by transfer of deionized water from a blank bottle to the Van Dorn (or integrated hose) and then dispensed into a new sample bottle in the field. During September of the 2001 field survey one of six Van Dorns was found to be contaminated and it was removed from service at that time. However, individual Van Dorn identification numbers were not recorded during use and it was impossible to censor data from that particular Van Dorn. Furthermore, an analysis of Van Dorn equipment blanks for the season showed a high rate of detectible total phosphorus contamination in blanks (45% of blank samples, see Table 5). It is unlikely that this contamination was due to bottle contamination or handling as concurrent river sampling with the same type bottles did not show a similar high contamination rate. After further analysis of the data it was decided that actual contamination of lake samples was probably much less because the Van Dorn is rinsed with lake water before use and during the passage to the sampling depth. So the lake TP data were kept and reported here for both surface 0.5m and the deep samples (both of which were collected with Van Dorns) but to qualify all samples with a b (blank contamination) unless a blank taken from the Van Dorn on the day of sampling did not show contamination. If contamination were significant, it is reasonable to assume that the contaminant would be rinsed out during successive use and that the successive duplicate sample, taken a minute later from the same site would show significantly different (lower) concentrations (see duplicate discussion below).

Further precautions are warranted when using TP lake data. High total phosphorus results should be compared to duplicates samples and these can be compared to phosphorus readings in other months in the same lake. Furthermore high total phosphorus concentrations can be related to Secchi disk readings and chlorophyll a results using the Carlson Trophic Index. For example, typically a total phosphorus concentrations of about 0.04 mg/l is associated with a Secchi disk reading of about 1.2 meters and a chlorophyll a concentration of about 15 ug/l.

13 There were no problems with any of the blanks for alkalinity or apparent color taken from the Van Dorns (Table 5). Nor were any contamination problems noted with the integrated hoses for chlorophyll a.

Duplicates and Splits: In 2001 the baseline lakes survey used duplicate samples to measure variability of the water quality sampling. Duplicates were collected from separate pulls of the Van Dorn. Duplicate samples must agree within either a concentration limit or a percent relative difference to be acceptable. The data quality objectives for field duplicates were: alkalinity within 2 mg/l or 20 percent; total phosphorus within 0.005 mg/l or 10%; apparent color within 10 ppb or 20%. Note that these data quality objectives were set to be much more stringent for alkalinity and total phosphorus than during the 2000 season. The relative percent difference results of the duplicate data are summarized in Table 6.

The duplicates from the 2001 lakes failed the total phosphorus data quality objectives 20% of the time (not all of these are necessarily qualified by a “d” by our QAQC procedures). Considering the blank contamination problem noted above the high failure of the duplicate samples is probably related to contamination of the Van Dorns rather than poor field technique. Note that the duplicate fail rate of the 2001 data using the less stringent 2000 DQOs was still higher in 2001 (6% compared to 0%) possibly suggesting something changed between the two surveys and this may be due to the cleaning procedures used in 2001 that may have inadvertently slightly contaminated some of the Van Dorns in 2001. Because later testing seemed to indicate that one or two Van Dorns were consistently contaminated it appears the problem is in the construction or composition of the Van Dorn itself (possibly associated with old or worn rubber constriction tubing used to close the end-caps). Overall, there were equal numbers of cases of increases as there were decreases in comparing total phosphorus concentration results from the second Van Dorn as compared to the first Van Dorn duplicate sample, indicating that rinsing of the Van Dorns with lake water was probably sufficient to eliminate contamination of the samples.

Of the 30 field duplicates analyzed for apparent color 4 (13%) failed to meet data quality objectives but this was judged to be slightly higher than expected and further work is needed on precision. Part of the problem is that high color samples are diluted and any minor analytical error I multiplied by the dilution factor. DQOs in future QAPPs may be adjusted to account for this. Three (10%) of the 30 pairs of alkalinity field duplicates failed to meet criteria and this was judged to be acceptable. Three (10%) of the 29 pairs of chlorophyll a duplicates failed a test of being within 2 ppb or within 20% and this was judged to be acceptable.

Data results:

The final Hydrolab data are presented in Tables 3 below. The final water quality data are presented in Table 4, below. Electronic versions of the final data files are available from the DWM. During the mid-June to mid-September sampling window the deeper lakes (>5m) were generally stratified as expected discovered. Although sediment samples were analyzed for the lakes the data have not been reviewed and are not presented here. The DFW compiled a final

14 report on the relationship between macrophyte coverage and fish density that is reported separately (Hartley, 2002). Briefly, no significant (α<0.05) relationships were reported between macrophyte coverage and gamefish density and the report recommended further studies.

Hydrologic summary: According to the USGS water report for the water year 2001 (USGS 2001) conditions were generally normal (between the lowest 25% and highest 25%) for runoff across the state. A peak flood was recorded in March-April in the Northeastern part of the state but this is not expected to impact the lakes in this baseline survey.

One of the lakes sampled, Musquashcut Pond, is a shallow eutrophic saltwater pond located just inside the coastal sand dunes of Scituate. Apparently the pond has a tidegate at the outlet and periodically the pond is flushed with tidal seawater. During our sampling the pond was brackish with salinity about half of that of seawater’s normal 35 ppt. There have been complaints of non- biting midges creating a nuisance to homeowners around the lake and there is an ongoing controversy regarding the proposed use of insecticides on the Pond. Because it is saltwater there was a concern that productivity may be naturally limited by nitrogen rather than phosphorus and thus samples were taken for nitrogen species in the pond and these samples were sent to SMAST (Dartmouth) for analysis. Because of a complete lack of documentation of quality control for the analyses from the SMAST laboratory the nitrogen data are not reported here.

Total phosphorus concentrations were generally high in the lakes and higher yet in the tributaries from the cranberry bogs. Commercial cranberry bog discharge or are tributary to the following lakes: East Monponsett Pond; West Monponsett Pond, Wampatuck Pond and Old Oaken Bucket Pond. Some samples were taken at tributary inlets to these ponds. There is a wastewater treatment plant (NPDES MA0101923) in Rockland discharging to French Stream that is tributary to Forge Pond in Hanover. The current NPDES permit allows up to 1 mg/l phosphorus in the Rockland discharge during summer months. Samples were taken downstream of the treatment plant discharge to monitor phosphorus loss in the stream enroute to the pond.

The results of Secchi disk transparency measurements showed a tendency for declining transparency as summer progressed. Some ponds (Ames Long Pond, Jacobs Pond, Musquashcut Pond, West Meadow Pond) were so shallow the disk was sometimes visible on the bottom (as indicated by a greater than “>“ symbol in Table 4 below. With the exception of the Congamond Lakes and Whitehall Reservoir that were clear, the lakes had relatively poor transparency and nearly all Secchi disk readings were less than 3 meters. Nine lakes failed to meet the 4-foot (1.2 m) swimming standard at least on one occasion (West Monponsett Pond, Watson Pond, Heard Pond, Willis Lake, Jacobs Pond, Lower Chandler Pond, Old Oaken Bucket Pond, Wampatuck Pond, Forge Pond and Musquashcut Pond). High apparent color (>80 PCU) may reduce transparency in many of these (Wampatuck Pond, Lake Sabbatia, West Monponsett Pond, Willis Lake, Lower Chandler Pond, Old Oaken Bucket Pond, and Forge Pond ).

There were several lakes with chlorophyll a commonly exceeding 20 ug/l indicating eutrophic conditions. These include West Monponsett Pond, Watson Pond, Heard Pond, Wampatuck Pond and Forge Pond. All except Watson Pond are associated with significant cranberry bogs or in the case of Forge Pond, inputs from a wastewater treatment plant upstream. Bordering wetlands and Canada geese may be nutrient sources for Watson Pond and other ponds in the survey.

15 Aquatic plant mapping proceeded with no major problems noted except for West Meadow Pond that was too shallow to access and no map was created although a percent biovolume of nearly 100% was estimated (Hartley, 2002). Maps of the plant surveys and depth maps (if completed) are presented in Figures 1-62 below. Hardcopies of the original maps are kept at DWM. A key to the macrophyte species is available in Appendix I.

Note that the following lakes were known to be treated with herbicides, which are expected to reduce plant cover in the summer of treatment and possibly for following years. Copper treatment for algal control is expected to reduce chlorophyll a and increase Secchi disk transparencies but the effect is usually temporary. Congamond Lakes were treated with Sonar (for rooted plants) and copper (for algal control) in 2001. Musquashcut Pond has been treated annually with herbicides and was treated with both copper and diquat (Reward) in 2001. Watson Pond was treated with Sonar in 1998 but is likely to have recovered by 2001. Lower Chandler was treated in 2000 with copper and various other herbicides that may have reduced plant cover in 2001. Heard Pond was treated with Sonar in 2001. Jacobs Pond was treated with Sonar in 2001. Farm Pond was treated with copper and a variety of other herbicides in 2001.

16 site B 40' deep hole #

access poi nt

site A # 35' deep hole

# site C

Congamond Lakes North Pond 32022, Middle Pond 32021, South Pond 32023 N Southwick 2000 0 2000 4000 Feet

date: 800 0 800 1600 Meters observers:

Figure 1. Congamond Locus Map.

17 Figure 2. Congamond Lakes Depth Map.

18 Figure 3. Congamond Lakes Species Distribution Map.

19 Figure 4. Congamond Lakes Percent Biovolume Map.

20 Figure 5. Congamond Lakes Macrophyte Density Map.

21 site D site F Stetson Brook White Oak Brook SARIS# 6236725 SARIS# 6236700

site E site G cranberry bog inl et swampi nlet # site C ## swampi nlet

# #

site H cranberry bog inlet #

site B 13' deep hole site A # 13' deep hole

#

pram under road

access poi nt

Monponsett Pond west 62119 Monponsett Pond east 62218 Halifax/Hanson N date: 1000 0 10002000 Feet observers: 500 0 500 1000 Meters

Figure 6. Monponsett Pond Locus Maps.

22 Figure 7. Monponsett Pond East and West Depth Maps.

23 Figure 8. Monponsett Pond West Macrophyte Percent Cover Map.

24 Figure 9. Monponsett Pond West Macrophyte Percent Biovolume Map.

25 Figure 10. Monponsett Pond West Species Distribution Map.

26 Figure 11. Monponsett Pond East Macrophyte Percent Biovolume Map.

27 Figure 12. Monponsett Pond East Macrophyte Percent Cover Map.

28 Figure 13. Monponsett Pond East Species Distribution Map.

29 site B ( Lake Sabbatia inl et) Snake Ri ver at Field Street SARIS# 6235750

#

site A 11' deep hole

# access poi nt

site A 25' deep hole

access poi nt #

Lake Sabbatia 62166 Watson Pond 62205

N Taunton 400 0 400 800 Meters date: 1000 0 1000 2000 Feet observers:

Figure 14. Lake Sabbatia and Watson Pond Locus Map.

30 Figure 15. Lake Sabbatia Depth Map.

31 Figure 16. Lake Sabbatia Macrophyte Percent Biovolume Map.

32 Figure 17. Lake Sabbatia Macrophyte Density Map.

33 Figure 18. Lake Sabbatia Species Distribution Map.

34 Figure 19. Watson Pond depth Map.

35 Figure 20. Watson Pond Macrophyte Percent Biovolume Map.

36 Figure 21. Watson Pond Macrophyte density Map.

37 Figure 22. Watson Pond Species Distribution Map.

38 site A access poi nt 15' deep hole

#

#

site B

Assabet River Reservoir 82004 300 0 300 600 Meters Westborough N date: 900 0 900 1800 Feet observers:

Figure 23. Assabet River Reservoir Locus Map.

39 Figure 24. Assabet River Reservoir Depth Map.

40 Figure 25. Assabet River Reservoir Percent Biovolume Map.

41 Figure 26. Assabet River Reservoir Percent Cover Map.

42 Figure 27. Assabet River Reservoir Species Distribution Map.

43 Figure 28. White Hall Reservoir Depth Map.

44 Figure 29. Whitehall Reservoir Percent Biovolume Map.

45 Figure 30. Whitehall Reservoir Percent Cover Map.

46 Figure 30. Whitehall Reservoir Species Distribution Map.

47 Figure 31. Forge Pond Depth Map.

48 Figure 32. Forge Pond Percent Biovolume Map.

49 Figure 33. Forge Pond Percent Cover Map.

50 Figure 34. Forge Pond Species Distribution Map.

51 Figure 35. Lower Chandler Pond Depth Map.

52 Figure 36. Lower Chandler Pond Percent Biovolume Map.

53 Figure 37. Lower Chandler Pond Percent Cover Map.

54 Figure 38. Lower Chandler Pond Species Distribution Map.

55 site A 3' deep hole

access poi nt #

site B unnamed inl et at Mann Hill Road

Musquashcut Pond 94105 200 0 200 400 Meters N Scituate date: 500 0 500 1000 Feet observers:

56 Figure 39. Musquashcut Pond Percent Biovolume Map.

57 Figure 40. Musquashcut Pond Percent Cover Map.

58 Figure 41. Musquashcut Pond Species Distribution Map.

59 Figure 42. Old Oaken Bucket Pond Depth Map.

60 Figure 43. Old Oaken Bucket Pond Percent Biovolume Map.

61 Figure 44. Old Oaken Bucket Pond Percent Cover Map.

62 Figure 45. Old Oaken Bucket Pond Species Distribution Map.

63 Figure 46. Wampatuck Pond Depth Map.

64 Figure 47. Wampatuck Pond Percent Biovolume Map.

65 Figure 50. Wampatuck Pond Percent Cover Map.

66 Figure 48. Wampatuck Pond Species Distribution Map.

67 Figure 49. Ames Long Pond Depth Map.

68 Figure 50. Ames Long Pond Species Map.

69 Figure 51. Ames Long Pond Macrophyte Density Map.

70 Figure 52. Ames Long Pond Macrophyte Biovolume Map.

71 Figure 53. Farm Pond Depth Map.

72 Figure 54. Farm Pond Macrophyte Species Map.

73 Figure 55. Farm Pond Macrophyte Density Map.

74 Figure 56. Farm Pond Macrophyte Biovolume Map.

75 Figure 60. Heard Pond Depth Map.

76 Figure 57. Heard Pond Macrophyte Species Map.

77 Figure 58. Heard Pond Macrophyte Density Map.

78 Figure 59. Heard Pond Macrophyte Biovolume Map.

79 Figure 60. Willis Pond Depth Map.

80 Figure 61. Willis Pond Macrophyte Species Map.

81 Figure 62. Willis Pond Macrophyte Density Map.

82 Figure 63. Willis Pond Macrophyte Biovolume Map.

83 Figure 64. Jacobs Pond Depth Map.

84 Figure 65. Jacobs Pond Macrophyte Species Map.

85 Figure 70. Jacobs Pond Macrophyte Density Map.

86 Figure 66. Jacobs Pond Macrophyte Biovolume Map.

87 Table 3. Hydrolab data Baseline Lake Monitoring, 2001 (QC Status: 4)

TMDL Baseline Lakes Survey (2001) (QC Status: 4) Exported: 6/8/2004 3:54:42 PM Congamond Lakes (Palis: 32021) Unique_ID: W0923 Station: A Description: Deep hole, center of Middle Basin, Southwick

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/19/2001 LB-1208 10:40 0.5 25.8u 7.6cu 163 105 -- 9.1u 109u 10:55 1.5 25.2u 7.6cu 163 104 -- 8.9 106 11:02 2.5 24.7u 7.5c 163 104 -- 8.1u 95u 11:07 3.5 21.1u 7.6c 165 106 -- 9.4u 103u 11:14 4.5 17.7u 7.5cu 167 107 -- 9.5u 97u 11:21 5.4 14.5u 7.4cu 167 107 -- 9.2u 88u 11:29 6.4 12.7u 7.1cu 168 108 -- 6.5u 60u 11:37 7.4 10.6 6.8u 169 108 -- 0.9u 8u 11:43 8.5 9.1 6.6u 170 109 -- <0.2 <2 11:48 9.2 8.7 6.6 177 113 -- <0.2 <2 7/18/2001 LB-1301 11:05 0.5 24.3 8.1c 167 107 -- 9.6 112 11:20 1.5 24.0 8.1c 168 107 -- 9.7 113 11:25 3.4 23.9 8.0c 167 107 -- 9.5 110 11:32 4.5 22.9u 7.5c 168 108 -- 7.9u 90u 11:40 5.5 19.2u 7.0cu 170 109 -- 6.3u 66u 11:47 6.5 14.8u 6.7 169 108 -- 3.6 35 11:53 7.5 12.0 6.6 167 107 -- 2.8u 25u 11:59 8.5 10.2 6.5 172 110 -- <0.2 <2 12:04 10.0 8.8 6.5 187 120 -- <0.2 <2 12:09 11.5 8.0u 6.4 224u 144u -- <0.2 <2 8/22/2001 LB-1394 11:26 0.5 26.4 8.6c 168 108 -- 9.9 120 11:37 2.5 26.0 8.6c 168 107 -- 9.9 119 11:44 4.0 25.8 8.4c 168 108 -- 9.1u 109u 11:53 5.0 23.1 6.7 172 110 -- ##u ##u 11:59 6.0 19.8u 6.5 173 110 -- 0.6u 6u 12:05 7.0 15.9u 6.4 171 109 -- <0.2 <2 12:13 8.0 11.7u 6.4 174u 111u -- <0.2 <2 12:19 9.5 9.5u 6.4 195 125 -- <0.2 <2 12:29 11.4 8.3 6.2 232u 148u -- <0.2 <2

88 Congamond Lakes (Palis: 32022) Unique_ID: W0924 Station: B Description: Deep hole, center of North Pond, Southwick

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/19/2001 LB-1213 13:49 0.5 26.5 7.3cu 119 76.2 -- 8.6u 105u 13:54 1.5 25.5u 7.4cu 119 76.0 -- 8.6 102 13:59 2.5 24.7u 7.7cu 119 76.0u -- 9.2u 107u 14:05 3.5 21.5u 7.9c 118 75.6 -- 10.0u 111u 14:09 4.4 17.1u 7.9cu 118 75.8u -- 11.5u 116u 14:15 5.4 13.0u 7.7cu 121 77.6u -- 11.6u 107u 14:21 6.4 10.0u 7.4cu 124 79.5 -- 11.1u 96u 14:27 7.4 8.1 7.4c 126 80.7 -- 12.0u 99u 14:32 8.4 6.6u 6.9cu 129 82.3 -- 1.4u 11u 14:37 10.4 5.6u 6.7u 136 86.8 -- <0.2u <2u 7/18/2001 LB-1305 14:12 0.5 25.1 8.1c 122u 78.1u -- 8.9u 106u 14:22 2.5 24.3u 8.2c 121 77.7 -- 9.1 107 14:27 4.5 23.2u 8.3c 121u 77.3u -- 10.3u 118u 14:33 5.5 17.4u 7.6cu 121 77.4 -- 11.9 122 14:38 6.5 13.6u 7.1cu 123 78.9 -- 11.0u 103u 14:43 7.5 10.6 7.0cu 125u 79.9u -- 10.5u 92u 14:48 8.5 8.8 6.7u 126 80.8 -- ##u ##u 14:55 10.0 6.8u 6.3u 129u 82.7u -- <0.2 <2 14:59 11.5 5.8 6.2 141u 90.2u -- <0.2 <2 15:06 12.2 5.7u 6.2 144u 91.8u -- <0.2 <2 8/22/2001 LB-1398 14:44 0.5 27.4u 8.3cu 126 80.4 -- 9.2u 113u 14:56 2.5 26.8u 8.3c 126 80.3 -- 9.2u 113u 15:01 4.0 26.5 8.2c 125 80.3 -- 9.2u 112u 15:06 5.0 23.6 8.9c 123 79.0 -- 13.8 159 15:13 6.0 17.9u 7.2cu 124 79.3 -- ##u ##u 15:18 7.0 14.3u 6.7u 126 80.3 -- 8.3u 79u 15:24 8.0 ##u 6.4 127 81.2 -- ##u ##u 15:30 9.0 9.4u 6.2u 127 81.3 -- 1.9u 16u 15:35 10.5 7.2 6.0 137u 87.8u -- <0.2 <2 15:42 12.0 6.2 6.0 148 94.9 -- <0.2 <2

Ames Long Pond (Palis: 62001) Unique_ID: W0940 Station: A Description: Deep hole, southern end of southern basin of pond, Easton

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/26/2001 LB-1500 10:57s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:01s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:05s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:09s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 7/31/2001 LB-1542 13:14s 0.5s 25.2s 6.6s 142s -- -- 7.5s 90s 13:17s 1.5s 23.6s 6.7s 142s -- -- 7.5s 88s 9/6/2001 LB-1584 11:24s 0.5s 22.2s 6.7s 138s -- -- 7.7s 88s 11:29s 1.5s 21.6s 6.7s 138s -- -- 7.8s 88s

89 Lake Sabbatia (Palis: 62166) Unique_ID: W0948 Station: A Description: Deep hole, approximately 900 feet southeast of boat ramp, Taunton

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/27/2001 LB-1236 10:29 0.5 27.4 6.4 145 92.6 -- 6.9 85 10:37 1.5 25.7 6.1 142u 90.6u -- 5.0u 59u 10:47 2.4 23.8 6.0 145 92.6 -- 3.8u 44u 10:54 3.5 19.5 6.0 159 102 -- 3.7u 39u 11:04 4.5 15.8u 5.9 158 101 -- 3.4u 33u 11:13 5.4 13.7 5.8 149u 95.0u -- 2.4 22 11:19 6.5 11.9 5.7 142 90.7 -- 0.9 8 11:26 7.5 10.8 5.7 137 87.7 -- 0.5 4 11:31 8.0 10.3u 5.8 138 88.2 -- <0.2u <2u 7/26/2001 LB-1329 14:05 0.5 26.6 6.7u 146 93.5 -- 7.3u 89u 14:11 1.0 26.6 6.7 146 93.5 -- 7.2 89 14:16 2.0 26.6 6.7 146u 93.5u -- 7.2 88 14:22 3.0 24.3u 6.3 145u 92.8u -- 4.7 55 14:29 4.0 19.9 5.9 150 96.0 -- 0.2u 2u 14:34 4.9 16.7u 5.8 154 98.0 -- <0.2 <2 14:40 6.0 13.2u 5.8 146u 94.0u -- <0.2 <2 14:46 7.0 11.7u 6.0u 151 97.0 -- <0.2 <2 8/28/2001 LB-1422 09:44 0.5 25.2 6.6i 157 101 -- 7.6u 91u 09:52 1.5 25.1 6.6 157 100 -- 7.5 89 10:02 2.5 24.9 6.5 158 101 -- 7.1u 85u 10:09 3.5 23.7 6.1 158 101 -- 3.7 43 10:15 4.5 19.2 6.1 162 104 -- <0.2 <2 10:20 5.6 15.2u 6.2 163 104 -- <0.2 <2 10:27 6.5 13.4 6.3 168 107 -- <0.2 <2 10:33 7.5 11.5 6.6u 176 112 -- <0.2 <2

Monponsett Pond (Palis: 62119) Unique_ID: W0926 Station: A Description: Deep hole, center of southern portion of west basin of pond, Halifax

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/20/2001 LB-1250 12:07 0.5 26.0 6.9c 161 103 -- 8.3 100 12:16 1.5 25.1 6.8u 161 103 -- 7.5u 89u 12:24 2.5 23.9 6.4u 165 105 -- 3.4u 39u 12:31 3.6 22.3 6.3 174 111 -- <0.2 <2 7/19/2001 LB-1343 10:08 0.5 23.5 6.5u 165 106 -- 6.0 69 10:15 1.5 23.5u 6.5 165 106 -- 6.0u 69u 10:20 2.5 23.5 6.5 165 106 -- 6.1 70 10:26 3.5 23.4 6.5 165 106 -- 5.9 68 8/21/2001 LB-1436 13:00 0.5 26.4 9.4c 171 110 -- 12.1u 147u 13:05 1.5 25.6 8.3cu 164 105 -- 9.5u 114u 13:13 2.5 25.2 6.8u 166 106 -- 7.5u 89u 13:19 3.3 24.1 6.1u 171 110 -- 0.8 9

90 Monponsett Pond (Palis: 62218) Unique_ID: W0930 Station: B Description: Deep hole, center of southern portion of east basin, Halifax

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/20/2001 LB-1254 16:03 0.5 27.7u 6.6u 139 88.7 -- 8.3u 103u 16:14 1.6 26.2u 6.7 139u 88.8u -- 8.0u 97u 16:25 2.5 23.1u 6.2u 139 89.0 -- 3.9u 45u 16:32 3.3 20.1 6.1u 145 93.0 -- 0.4 5 7/19/2001 LB-1351 12:13 0.6 24.0 6.6 143 91.5 -- 8.0 92 12:20 1.5 23.9 6.6 143 91.5 -- 7.9 91 12:26 2.6 23.9 6.6 143 91.2 -- 7.7 89 12:32 3.0 23.4u 6.1u 144 92.1 -- 2.6u 29u 8/21/2001 LB-1440 15:11 0.5 27.1 6.9c 144 92.2 -- 8.4 104 15:20 1.5 26.2u 6.6 144 92.2 -- 7.7u 94u 15:25 2.5 25.0u 6.2u 145 92.7u -- 5.4u 65u 15:32 2.9 24.3 6.0 147 94.1 -- 2.6 30

Watson Pond (Palis: 62205) Unique_ID: W0947 Station: A Description: Deep hole, center of pond, approximately 275 feet south from north central shore, Taunton

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/27/2001 LB-1241 13:49 0.5 28.5 7.2cu 116 73.9 -- 9.5u 119u 13:59 1.5 26.3 6.7 115 73.3 -- 8.3u 100u 14:05 2.4 24.3u 6.1 118 75.7 -- <0.2 <2 LB-1242 14:13 0.5 28.3 7.6cu 115 73.9 -- 9.7 121 14:18 1.5 26.2u 6.7u 115 73.4 -- 8.1u 97u 14:25 2.5 23.9u 6.1 120 76.7 -- <0.2 <2 7/26/2001 LB-1334 11:09 0.5 27.4 6.9cu 119 76.0 -- 8.2 102 11:22 1.0 27.4 7.0c 119 76.0 -- 8.1 100 11:27 1.5 27.4 7.0cu 119 76.0 -- 8.1 101 11:32 2.0 26.2u 6.4u 119 76.2 -- 5.4 66 11:38 2.5 23.7u 6.3u 133 84.8 -- <0.2 <2 8/28/2001 LB-1427 12:50 0.5 25.9u 6.8 117 74.8 -- 8.3u 100u 12:54 1.5 25.0 6.5 117 74.8 -- 6.4u 76u 13:03 2.5 24.1 6.2 130 82.9 -- <0.2 <2

91 Assabet River Reservoir (Palis: 82004) Unique_ID: W0938 Station: A Description: Deep hole, center of eastern lobe, Westborough

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/26/2001 LB-1269 13:57 0.5 27.4u 8.4c 172 110 -- 9.4u 115u 14:02 1.5 26.1 8.4c 172 110 -- 9.3u 111u 14:14 2.0 25.1 7.8cu 173 111 -- 8.9u 105u 14:06 2.5 21.9 6.8u 188 120 -- 5.3u 59u 14:10 2.7 20.3 6.4u 195 125 -- 3.5u 38u 7/24/2001 LB-1362 13:40 0.5 27.1 8.1c 181 116 -- 8.6 107 13:45 1.5 27.1 8.1c 181 116 -- 8.7u 107u 13:59 2.4 27.0 8.0c 181 116 -- 8.0u 98u 8/29/2001 LB-1455 10:12 0.5 25.3 8.1cu 189 121 -- 8.8 105 10:19 1.5 25.2 8.1cu 189 121 -- 8.8u 105u 10:35 2.3 24.3 6.2 193 124 -- ##u ##u 10:24 2.5 23.9u 6.0 201 128 -- 0.3u 4u 10:29 2.7 23.0 5.8 239u 153u -- <0.2 <2

Farm Pond (Palis: 82035) Unique_ID: W0946 Station: A Description: Deep hole, southeast quadrant of pond, Framingham

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/28/2001 LB-1513 12:07s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:11s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:21s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:30s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:31s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:32s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 8/9/2001 LB-1555 09:03 0.5 29.2 8.5c 876c 561c -- 8.6u 111u 09:09 1.5 29.2 8.6c 878c 562c -- 8.6u 110u 09:18 2.5 27.1 8.1c 876c 561c -- 8.3u 103u 09:26 3.5 25.0u 7.1cu 939c 601c -- 1.7u 20u 09:33 4.5 21.6u 7.1c ##cu ##cu -- <0.2 <2 09:38 5.4 17.9u 7.6cu 2,326cu 1,490cu -- <0.2 <2 9/7/2001 LB-1597 11:52s 0.5s 23.2s 8.1cs 939cs -- -- 9.3s 100s 11:57s 1.5s 22.6s 8.0cs 945cs -- -- 9.1s 97s 12:01s 2.5s 22.3s 7.9cs 944cs -- -- 8.4su 89su 12:06s 3.5s 22.2s 7.7cs 944cs -- -- 8.1s 87s

92 Heard Pond (Palis: 82058) Unique_ID: W0944 Station: A Description: Deep hole, northeast quadrant of pond, Wayland

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/27/2001 LB-1487 10:00s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 10:03s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 10:07s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 10:10s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 10:15s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 8/1/2001 LB-1529 10:04s 0.5s 25.3su 7.2csu 378s -- -- 8.6su 104su 10:08s 1.5s 24.3s 6.8su 378s -- -- 6.5su 75su 9/4/2001 LB-1571 10:37s 0.5s 22.7s 7.4cs 394s -- -- 8.9s 103s 10:41s 1.5s 22.5s 7.3cs 394s -- -- 8.5su 98su

Whitehall Reservoir (Palis: 82120) Unique_ID: W0942 Station: A Description: Deep hole, center of southern lobe, Hopkinton

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/26/2001 LB-1274 10:01 0.5 26.6u 6.4u 101 64.4 -- 8.2 99 10:05 1.5 25.3 6.4 101 64.3 -- 8.3 98 10:10 2.5 24.3 6.2u 101 64.9 -- 7.3 84 10:15 3.5 20.2 5.8 104 66.6 -- 5.5 59 10:20 4.0 17.4u 5.7 105 66.9 -- 4.3 43 10:25 5.0 14.8u 5.6 104 66.2 -- 3.3 31 10:30 5.5 13.0 5.5 103 66.1 -- 3.0 28 10:35 6.5 10.9 5.4 103u 66.1u -- 1.5u 13u 10:40 7.0 10.3 5.4 104 66.6 -- 1.0 8 10:45 7.5 9.6 5.6u 107u 68.2u -- <0.2 <2 7/24/2001 LB-1367 09:54 0.5 25.2 6.5 102 65.4 -- 8.3 100 10:01 1.6 25.2 6.5 102 65.4 -- 8.3 99 10:08 2.4 25.1 6.5 102 65.4 -- 8.3 99 10:17 3.6 22.8u 5.8u 103 66.2 -- 4.0u 46u 10:22 4.5 18.3u 5.5 105 67.0 -- ##i ##i 10:32 5.4 14.4u 5.4 103u 66.1u -- 1.1 11 10:37 6.5 12.1u 5.5 105u 66.9u -- <0.2 <2 8/29/2001 LB-1460 13:12 0.5 25.5u 6.3u 102u 65.4u -- 8.0 96 13:15 2.0 24.8 6.3 102 65.3 -- 8.0 95 13:21 3.0 24.5 6.3 102 65.3 -- 7.9 92 13:54 3.5 24.0 6.2u 102 65.5 -- ##u ##u 13:25 4.0 22.4u 5.6u 105 67.3 -- 0.4iu 5iu 13:29 4.5 18.7u 5.5 106u 67.5u -- 0.5i 5i 13:34 5.0 16.6 5.4 105u 67.2u -- 0.4iu 4iu 13:39 5.5 14.5 5.5 103 65.8 -- 5.1iu 49iu 13:43 6.1 12.9 5.4 102 65.4 -- ##u ##u 13:47 7.0 10.9u 6.3u 144u 92.2u -- <0.2 <2

93 Willis Lake (Palis: 82122) Unique_ID: W0945 Station: A Description: Deep hole, southeast quadrant of pond, Sudbury

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/27/2001 LB-1491 11:48s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:51s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:55s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 11:58s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 12:01s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 8/1/2001 LB-1533 11:09s 0.5s 26.3s 5.7s 47.4s -- -- 6.5su 80su 11:14s 1.5s 23.4s 5.4s 47.4s -- -- 4.0s 47s 11:18s 2.5s 22.1s 5.5s 55.9s -- -- <0.2s <2s 9/4/2001 LB-1575 11:36s 0.5s 22.9s 5.9s 48.3s -- -- 6.7s 78s 11:40s 1.5s 22.5s 5.8s 48.3s -- -- 6.3s 73s

Jacobs Pond (Palis: 94077) Unique_ID: W0941 Station: A Description: Deep hole, southern end of pond, Norwell

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/26/2001 LB-1520 13:44s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 13:47s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 13:51s ##ms ##ms ##ms ##ms -- -- ##ms ##ms 7/31/2001 LB-1546 11:04s 0.5s 24.0s 6.6s 314s -- -- 7.5s 88s 11:08s 1.0s 23.0s 6.7s 313s -- -- 7.4s 85s 9/6/2001 LB-1588 13:37s 0.5s 23.9s 6.6s 293s -- -- 7.8s 91s 13:41s 1.0s 21.3s 6.5s 290s -- -- 7.7su 85su

Lower Chandler Pond (Palis: 94091) Unique_ID: W0933 Station: A Description: Deep hole in southwest corner of pond, approximately 100 feet from outfall and road, Duxbury/Pembroke.

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/21/2001 LB-1284 11:37 0.5 25.5 6.2 157 100 -- 6.3u 75u 11:51 1.5 25.4 6.2 157 100 -- 6.0u 72u 7/17/2001 LB-1377 14:27 0.5 24.4 6.4 157 100 -- 7.2u 84u 14:35 1.5 23.1 6.0 156 100 -- 2.9u 33u 14:40 1.9 22.0 6.0 159 102 -- <0.2u <2u LB-1385 14:49 0.5 24.4 6.4 158 101 -- 7.1 84 14:56 1.5 23.0 6.0 158 101 -- 2.3u 26u 15:00 1.9 22.0 6.0 160 102 -- <0.2 <2 8/30/2001 LB-1470 11:40 0.5 25.5 6.6 155 99.0 -- 8.7 103 11:47 1.5 23.8u 6.1 155 99.0 -- 4.1u 47u

94 Musquashcut Pond (Palis: 94105) Unique_ID: W0951 Station: A Description: Deep hole, approximately 250 feet southeast of Seagate Circle peninsula, Scituate

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/28/2001 LB-1222 12:48 0.8 28.1 8.3c 27,778 -- 17.0 7.9 109 7/25/2001 LB-1315 10:43 0.5 27.2 7.4c 21,257s -- 12.7s 6.4u 85u 8/23/2001 LB-1408 13:07 0.5 26.2 8.3c 39,434 -- 25.2 9.3u 130u

Old Oaken Bucket Pond (Palis: 94113) Unique_ID: W0953 Station: A Description: Deep hole, southern end of pond, triangulate 160 feet off of two outlet structures, Scituate

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/28/2001 LB-1227 14:54 0.7 ##u 6.4u 278u 178u -- <0.2i <2i 7/25/2001 LB-1320 14:50 0.5 26.1 6.3 241 154 -- ##u ##u 14:56 1.0 18.8 5.9 243 156 -- ##u ##u LB-1321 15:17 0.5 ##u 6.3 241u 154u -- 4.5u 55u 15:20 1.0 ##u 5.9 242 155 -- 2.2u 24u 8/23/2001 LB-1413 11:13 0.5 23.4 6.2 252 161 -- ##u ##u 11:20 1.0 20.9u 6.0u 261u 167u -- <0.2 <2

WEST MEADOW BROOK/West Meadow Pond (Saris: 6237425) (Palis: 62208) Unique_ID: W0950 Station: A, Mile Point: 3.7 Description: Deep hole, middle of pond, West Bridgewater

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/28/2001 LB-1505 10:12s 0.5s 27.1s 6.8s 213s -- -- 6.9su 87su 10:15s 1.0s 26.8s 6.6s 211s -- -- 5.7su 70su 9/7/2001 LB-1600 09:53s 0.5s 18.9su 6.4su 198s -- -- 4.0su 42su

INDIAN HEAD BROOK/Wampatuck Pond (Saris: 9456875) (Palis: 94168) Unique_ID: W0935 Station: A, Mile Point: 2.3 Description: Deep hole northern end of Wampatuck Pond (impoundment of Indian Head Brook), midway between island and eastern shore,

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 6/21/2001 LB-1288 14:56 0.5 26.2 6.3u 145 93.0 -- 6.3u 76u 15:03 1.2 26.0 6.4 144 92.1 -- 6.1 74 7/17/2001 LB-1381 10:52 0.5 24.2 8.0cu 143 91.4 -- 10.8u 126u 11:11 1.0 24.0 7.4cu 143 91.8 -- 9.8u 114u 8/30/2001 LB-1474 14:00 0.5 26.7u 9.0cu 156 100 -- 10.5u 128u 14:09 1.0 24.2 6.5u 154 99.0 -- 4.9u 57u

95 DRINKWATER RIVER/Forge Pond (Saris: 9456900) (Palis: 94037) Unique_ID: W0954 Station: A, Mile Point: 0.6 Description: Deep hole, southeast quadrant of pond, Hanover

Date OWMID Time Depth Temp pH Cond@ 25C TDS SAL DO SAT (24hr) (m) (C) (SU) (uS/cm) (mg/l) (ppt) (mg/l) (%) 7/3/2001 LB-1808 09:40 1.0 18.3u 6.2 289 185 -- 5.8 60 09:47 2.0 17.0 6.2 291 186 -- 6.5 66 8/2/2001 LB-1828 12:32 0.4 25.2u 9.1cu 540 346 -- 13.6 161 13:02 1.3 21.2 7.6cu 546 350 -- 9.7u 106u 9/5/2001 LB-1848 10:31 0.5 20.3u 7.0c 449 287 -- 9.6 105 10:37 1.3 20.3u 7.0c 450 288 -- 9.5 104 LB-1852 10:45 0.5 20.4 7.1c 448 287 -- 9.9 107 10:51 1.3 20.3 7.1cu 450 288 -- 9.9u 107u

96 Table 4. Water Quality Data. Baseline Lake Monitoring, 2001 (QC Status: 4) TMDL Baseline Lakes Survey (2001) (QC Status: 4) Exported: 6/8/2004 10:56:10 AM Congamond Lakes (Palis: 32021) Unique_ID: W0923 Station: A Description: Deep hole, center of Middle Basin, Southwick

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/19/2001 3.0 10:37 9.8 LB LB ** 0.5 Surface 20d 0.021 22 1204 1203 LB LB 11:55 0.5 Surface 11d 0.021 16 1203 1204 LB -- ** 9.3 Bottom 48 0.046 24 1205 LB LB ** 0 - ** Depth 8.6 1206 1207 Integrated LB LB ** 0 - ** Depth 10.4 1207 1206 Integrated 7/18/2001 2.7 11:00 12.0 LB LB 11:30 0.5 Surface 43 0.017 <15h 1296 1297 LB LB 11:35 0.5 Surface 43 0.016 <15h 1297 1296 LB -- 12:30 11.5 Bottom 73 0.19 65h 1298 LB LB- 12:24 0 - 8.1 Depth 12.9 1299 1300 Integrated LB LB- 12:26 0 - 8.1 Depth 12.1 1300 1299 Integrated 8/22/2001 2.4 11:50 12.0 LB LB 12:15 0.5 Surface 44 0.019b 22 1390 1389 LB LB 12:15 0.5 Surface 43 0.020b 18 1389 1390 LB -- 12:30 11.4 Bottom 85 0.34b 75 1391 LB LB- 12:45 0 - 7.2 Depth 16.7 1392 1393 Integrated LB LB- 12:50 0 - 7.2 Depth 15.6 1393 1392 Integrated

97 Congamond Lakes (Palis: 32022) Unique_ID: W0924 Station: B Description: Deep hole, center of North Pond, Southwick

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/19/2001 4.6 13:45 13.4 LB -- ** 0.5 Surface 11 0.017b <15 1210 LB -- ** 10.8 Bottom 34 0.068b 24 1211 LB -- ** 0 - ** Depth 2.6 1212 Integrated 7/18/2001 3.3 14:00 13.5 LB -- 14:45 0.5 Surface 30 0.013b <15h 1302 LB -- 15:05 12.2 Bottom 41 0.083b 40h 1303 LB -- 14:55 0 - 8.1 Depth 3.3 1304 Integrated 8/22/2001 3.7 15:10 12.5 LB -- 15:00 0.5 Surface 30 0.012 <15 1395 LB -- 16:00 12.0 Bottom 44 0.083 43 1396 LB -- 15:50 0 - 11.1 Depth 11.3 1397 Integrated

Congamond Lakes (Palis: 32023) Unique_ID: W0925 Station: C Description: Deep hole, center of South Pond, Southwick

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/19/2001 ** 13:00 7.3 LB -- ** 0.5 Surface 0.025b 1209 7/18/2001 1.5 13:15 ** LB -- 13:15 0.5 Surface 0.028b 1306 8/22/2001 2.0 13:40 6.1 LB -- 13:40 0.5 Surface 0.027b 1399

98 Ames Long Pond (Palis: 62001) Unique_ID: W0940 Station: A Description: Deep hole, southern end of southern basin of pond, Easton

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/26/2001 >2.5 11:15 2.5 LB LB ** 0.5 Surface 7 0.034bd 27d 1496 1495 LB LB ** 0.5 Surface 7 0.015bd <15d 1495 1496 LB -- ** 2.0 Bottom 7 0.014bd 18 1497 LB LB ** 0 - 2.0 Depth 1.2 1499 1498 Integrated LB LB ** 0 - 2.0 Depth 1.9 1498 1499 Integrated 7/31/2001 >2.2 13:11 2.2 LB LB 13:20 0.5 Surface 9 0.014 43 1537 1538 LB LB 13:21 0.5 Surface 8 0.014 43 1538 1537 LB -- 13:23 1.7 Bottom 8 0.015 37 1539 LB LB- 13:25 0 - 1.7 Depth 5.3 1540 1541 Integrated LB LB- 13:27 0 - 1.7 Depth 5.2 1541 1540 Integrated 9/6/2001 >2.1 11:17 2.1 LB LB 11:35 0.5 Surface 8 0.009 24 1579 1580 LB LB 11:35 0.5 Surface 9 0.009 24 1580 1579 LB -- 11:39 1.6 Bottom 8 0.010 22 1581 LB LB- 11:30 0 - 1.6 Depth 4.3 1582 1583 Integrated LB LB- 11:30 0 - 1.6 Depth 2.6 1583 1582 Integrated

99 Lake Sabbatia (Palis: 62166) Unique_ID: W0948 Station: A Description: Deep hole, approximately 900 feet southeast of boat ramp, Taunton

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/27/2001 2.0 10:25 8.6 LB LB ** 0.5 Surface 12 0.037b 75 1231 1232 LB LB ** 0.5 Surface 10 0.033b 80 1232 1231 LB -- ** 8.0 Bottom 10 0.051b 60 1233 LB LB ** 0 - 6.0 Depth <1.0 1235 1234 Integrated LB LB ** 0 - 6.0 Depth <1.0 1234 1235 Integrated 7/26/2001 2.1 14:50 8.2 LB LB 14:14 0.5 Surface 12 0.028 100h 1324 1325 LB LB 14:14 0.5 Surface 12 0.031 110h 1325 1324 LB -- 14:40 7.5 Bottom 12 0.061 200h 1326 LB LB- 15:10 0 - 6.0 Depth <1.0 1328 1327 Integrated LB LB- 15:10 0 - 6.0 Depth 1.1 1327 1328 Integrated 8/28/2001 2.5 09:40 8.1 LB LB ** 0.5 Surface 11 0.022b 50 1417 1418 LB LB ** 0.5 Surface 11 0.026b 60 1418 1417 LB -- ** ** Bottom 16 0.085b 140 1419 LB LB ** 0 - ** Depth 2.6 1421 1420 Integrated LB LB ** 0 - ** Depth 2.3 1420 1421 Integrated 10/4/2001 1.5 09:30 5.8 LB -- 09:40 0.5 Surface 0.020b 1864

100 Monponsett Pond (Palis: 62119) Unique_ID: W0926 Station: A Description: Deep hole, center of southern portion of west basin of pond, Halifax

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 1.1 11:30 4.1 LB LB ** 0.5 Surface 8 0.057b 65 1245 1246 LB LB ** 0.5 Surface 8 0.048b 65 1246 1245 LB -- ** 3.6 Bottom 14 0.072b 120 1247 LB LB ** 0 - 3.3 Depth 14.6 1248 1249 Integrated LB LB ** 0 - 3.3 Depth 16.8 1249 1248 Integrated 7/19/2001 1.2 10:30 4.0 LB LB ** 0.5 Surface 10 0.066 75h 1339 1338 LB LB ** 0.5 Surface 10 0.066 85h 1338 1339 LB -- ** ** Bottom 10 0.068 80h 1340 LB LB ** 0 - ** Depth 22.0 1342 1341 Integrated LB LB ** 0 - ** Depth 22.6 1341 1342 Integrated 8/21/2001 0.7 12:13 3.8 LB LB 12:04 0.5 Surface 10 0.055b 100 1431 1432 LB LB 12:08 0.5 Surface 12 0.056b 95 1432 1431 LB -- 12:13 3.3 Bottom 12 0.051b 110 1433 LB LB- 12:16 0 - 2.1 Depth 200d 1434 1435 Integrated LB LB- 12:19 0 - 2.1 Depth 70d 1435 1434 Integrated

101 Monponsett Pond (Palis: 62218) Unique_ID: W0930 Station: B Description: Deep hole, center of southern portion of east basin, Halifax

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 2.4 15:50 3.8 LB -- ** 0.5 Surface <2 0.024b 50 1251 LB -- ** 3.3 Bottom 10 0.041b 65 1252 LB -- ** 0 - 3.3 Depth 3.9 1253 Integrated 7/19/2001 2.0 12:30 3.5 LB -- ** 0.5 Surface 6 0.028b 65h 1348 LB -- ** ** Bottom 7 0.033b 60h 1349 LB -- ** 0 - ** Depth 6.8 1350 Integrated 8/21/2001 2.2 15:01 3.4 LB -- 15:11 0.5 Surface 6 0.023b 49 1438 LB -- 15:15 2.9 Bottom 8 0.028b 80 1437 LB -- 15:20 0 - 2.9 Depth 7.4 1439 Integrated

Watson Pond (Palis: 62205) Unique_ID: W0947 Station: A Description: Deep hole, center of pond, approximately 275 feet south from north central shore, Taunton

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/27/2001 1.6 13:50 3.0 LB -- ** 0.5 Surface 11 0.042b 50 1238 LB -- ** 2.5 Bottom 15 0.065b 85 1239 LB -- ** 0 - 2.5 Depth 14.3 1240 Integrated 7/26/2001 1.6 11:38 10.0 LB -- 11:00 0.5 Surface 14 0.048b 49h 1331 LB -- 11:20 2.5 Bottom 17 0.098b 100h 1332 LB -- 11:50 0 - 2.5 Depth 27.1 1333 Integrated 8/28/2001 0.8 13:10 3.0 LB -- ** 0.5 Surface 21 0.058 55 1424 LB -- ** ** Bottom 16 0.067 75 1425 LB -- ** 0 - ** Depth 45.0 1426 Integrated 10/4/2001 0.5 09:00 3.0 LB LB 09:12 0.5 Surface 0.064 1862 1863 LB LB 09:14 0.5 Surface 0.069 1863 1862

Assabet River Reservoir (Palis: 82004) Unique_ID: W0938 Station: A

102 Description: Deep hole, center of eastern lobe, Westborough

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/26/2001 3.0 13:50 3.3 LB LB 14:20 0.5 Surface 11d 0.019b 37h 1264 1265 LB LB 14:25 0.5 Surface 22d 0.018b 37h 1265 1264 LB -- 14:35 ** Bottom 21 0.048b 65h 1266 LB LB- 14:46 0 - ** Depth ##h 1267 1268 Integrated LB LB- 14:46 0 - ** Depth ##h 1268 1267 Integrated 7/24/2001 2.6 13:56 3.2 LB LB ** 0.5 Surface 15 0.022 38 1358 1357 LB LB ** 0.5 Surface 15 0.022 34 1357 1358 LB -- ** ** Bottom 28 0.085 280 1359 LB LB ** 0 - ** Depth 6.8d 1361 1360 Integrated LB LB ** 0 - ** Depth 4.3d 1360 1361 Integrated 8/29/2001 2.6 11:04 3.3 LB LB 10:50 0.5 Surface 16 ##d 39 1451 1450 LB LB 10:50 0.5 Surface 17 ##d 43 1450 1451 LB -- 11:00 2.7 Bottom 28 0.024d 320 1452 LB LB- 11:11 0 - 2.7 Depth 28.8 1453 1454 Integrated LB LB- 11:13 0 - 2.7 Depth 34.2 1454 1453 Integrated

Assabet River Reservoir (Palis: 82004) Unique_ID: W0939 Station: B Description: Center of lake, approximately 600 feet north of point on southern shore, Westborough

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/24/2001 ** ** ** LB- -- 15:05 -- 0.020b 1270 7/24/2001 ** ** ** LB -- ** -- 0.025b 1363 8/29/2001 ** ** ** LB -- 11:33 0.5 Surface 0.019b 1456

103 Farm Pond (Palis: 82035) Unique_ID: W0946 Station: A Description: Deep hole, southeast quadrant of pond, Framingham

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/28/2001 2.5 11:58 5.9 LB LB ** 0.5 Surface 33 0.019b 24 1508 1509 LB LB ** 0.5 Surface 34 0.013b 27 1509 1508 LB -- ** 5.4 Bottom 55 0.040b 24 1510 LB LB ** 0 - 5.4 Depth 10.2 1511 1512 Integrated LB LB ** 0 - 5.4 Depth 13.0 1512 1511 Integrated 8/9/2001 3.4 10:05 6.0 LB LB 09:30 0.5 Surface 36 0.015 18 1550 1551 LB LB 09:35 0.5 Surface 35 0.015 <15 1551 1550 LB -- 09:50 5.5 Bottom 110 0.070 540 1552 LB LB- 10:10 0 - 5.5 Depth 22.0 1553 1554 Integrated LB LB- 10:10 0 - 5.5 Depth 22.3 1554 1553 Integrated 9/7/2001 1.8 11:42 4.0 LB LB 12:15 0.5 Surface 41 0.022b 28 1592 1593 LB LB 12:15 0.5 Surface 41 0.021b 27 1593 1592 LB -- 12:20 3.5 Bottom 41 0.024b 23 1594 LB LB- 12:25 0 - 3.5 Depth 6.6 1595 1596 Integrated LB LB- 12:25 0 - 3.5 Depth 4.6 1596 1595 Integrated

104 Heard Pond (Palis: 82058) Unique_ID: W0944 Station: A Description: Deep hole, northeast quadrant of pond, Wayland

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/27/2001 1.2 09:54 2.6 LB LB ** 0.5 Surface 19 0.022b 37 1483 1482 LB LB ** 0.5 Surface 19 0.026b 37 1482 1483 LB -- ** 2.1 Bottom 21 0.058b 55 1484 LB LB ** 0 - 2.1 Depth 24.6 1486 1485 Integrated LB LB ** 0 - 2.1 Depth 22.4 1485 1486 Integrated 8/1/2001 0.9 10:01 2.0 LB LB 10:10 0.5 Surface 34d 0.043 43 1524 1525 LB LB 10:10 0.5 Surface 25d 0.038 43 1525 1524 LB -- 10:15 1.5 Bottom 25 0.067 49 1526 LB LB- 10:15 0 - 1.5 Depth 17.4 1527 1528 Integrated LB LB- 10:15 0 - 1.5 Depth 16.8 1528 1527 Integrated 9/4/2001 0.3 10:34 2.0 LB LB 10:45 0.5 Surface 24 0.075 70 1566 1567 LB LB 10:46 0.5 Surface 24 0.074 70 1567 1566 LB LB- 10:49 0 - 1.5 Depth 29.8 1569 1570 Integrated LB LB- 10:50 0 - 1.5 Depth 26.7 1570 1569 Integrated

105 Whitehall Reservoir (Palis: 82120) Unique_ID: W0942 Station: A Description: Deep hole, center of southern lobe, Hopkinton

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/26/2001 3.2 11:15 8.2 LB -- 11:00 0.5 Surface <2f 0.023bf 41f 1271 LB -- 11:15 7.5 Bottom 5f 0.018bf 34f 1272 LB -- 11:25 0 - 7.0 Depth 2.0f 1273 Integrated 7/24/2001 3.0 10:00 7.3 LB -- ** 0.5 Surface 5 0.016b 39 1364 LB -- ** ** Bottom 7 0.022b 34 1365 LB -- ** 0 - ** Depth 5.9 1366 Integrated 8/29/2001 4.2 14:20 8.4 LB -- 14:08 0.5 Surface 6 0.009b 31 1457 LB -- 14:15 7.0 Bottom 21 0.047b 280 1458 LB -- ** 0 - 7.0 Depth 9.5 1459 Integrated

Whitehall Reservoir (Palis: 82120) Unique_ID: W0943 Station: B Description: Center of lake, approximately 1000 feet east of large island, Hopkinton

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/26/2001 ** ** ** LB- -- 11:40 -- 0.016bf 1275 7/24/2001 ** ** ** LB -- ** -- 0.015b 1368 8/29/2001 ** ** ** LB- -- 14:45 -- 0.009b 1461

106 Willis Lake (Palis: 82122) Unique_ID: W0945 Station: A Description: Deep hole, southeast quadrant of pond, Sudbury

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/27/2001 0.8 11:43 2.9 LB -- ** 0.5 Surface <2 0.033b 110 1488 LB -- ** 2.4 Bottom 4 0.13b 180 1489 LB -- ** 0 - 2.4 Depth 13.2 1490 Integrated 8/1/2001 1.0 11:05 2.6 LB -- 11:25 0.5 Surface 2 0.054b 160 1530 LB -- 11:30 2.1 Bottom 2 0.036b 180 1531 LB -- 11:22 0 - 2.1 Depth 13.0 1532 Integrated 9/4/2001 1.1 11:33 2.3 LB -- 11:45 0.5 Surface 2.0 0.050b 170 1572 LB -- 11:47 1.8 Bottom 2.0 0.047b 170 1573 LB -- ** 0 - 1.8 Depth 10.7 1574 Integrated 10/4/2001 0.7 12:25 2.4 LB -- 12:30 0.5 Surface 0.058b 1868

Jacobs Pond (Palis: 94077) Unique_ID: W0941 Station: A Description: Deep hole, southern end of pond, Norwell

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/26/2001 >1.3 13:39 1.3 LB -- ** 0.5 Surface 10 0.034b 100 1517 LB -- ** 0.8 Bottom 18 0.031b 85 1518 LB -- ** 0 - 0.8 Depth 4.7 1519 Integrated 7/31/2001 1.1 11:00 1.2 LB -- 11:10 0.5 Surface 8 0.041b 120 1543 LB -- 11:12 0 - 0.6 Depth 7.8 1545 Integrated 9/6/2001 >1.5 13:30 1.5 LB -- 13:45 0.5 Surface 8 0.038b 160 1585 LB -- 13:45 0 - ** Depth 3.1 1587 Integrated 10/2/2001 0.7 09:35 1.5 LB LB 09:33 0.5 Surface 0.034h 1854 1855 LB LB 09:35 0.5 Surface 0.034h 1855 1854

Lower Chandler Pond (Palis: 94091) Unique_ID: W0933 Station: A

107 Description: Deep hole in southwest corner of pond, approximately 100 feet from outfall and road, Duxbury/Pembroke.

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/21/2001 1.1 11:38 2.1 LB LB ** 0.5 Surface 7 0.042b 120m 1280 1279 LB LB ** 0.5 Surface 8 0.042b 110m 1279 1280 LB -- ** ** Bottom 8 0.039b 100m 1281 LB LB ** 0 - ** Depth 5.8 1282 1283 Integrated LB LB ** 0 - ** Depth 5.5 1283 1282 Integrated LB -- ** 0 - ** Depth <1.0 1278 Integrated 7/17/2001 1.1 14:22 2.4 LB LB 14:35 0.5 Surface 7 0.054b 130dh 1372 1373 LB LB 14:40 0.5 Surface 8 0.054b 100dh 1373 1372 LB -- 15:00 ** Bottom 9 0.047b 150h 1374 LB LB ** 0 - 1.9 Depth 12.7 1376 1375 Integrated LB LB- 15:13 0 - 1.9 Depth 12.5 1375 1376 Integrated 8/30/2001 1.0 11:54 2.1 LB LB 12:00 0.5 Surface 9 0.045d 120d 1466 1465 LB LB 12:00 0.5 Surface 9 0.036d 150d 1465 1466 LB -- 12:10 1.5 Bottom 9 0.037d 120 1467 LB LB- 12:15 0 - 1.5 Depth 19.2 1468 1469 Integrated LB LB- 12:20 0 - 1.5 Depth 18.2 1469 1468 Integrated 10/2/2001 1.5 11:30 2.1 LB -- 11:35 0.5 Surface 0.032b 1857

108 Musquashcut Pond (Palis: 94105) Unique_ID: W0951 Station: A Description: Deep hole, approximately 250 feet southeast of Seagate Circle peninsula, Scituate

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/28/2001 0.6 12:38 1.0 LB LB ** 0.5 Surface 69 0.10 39d 1217 1218 LB -- ** 0.5 Surface 69 0.076 65 1219 LB LB ** 0.5 Surface 69 0.11 60d 1218 1217 LB LB ** 0 - 0.5 Depth 23.2 1220 1221 Integrated LB LB ** 0 - 0.5 Depth 25.0 1221 1220 Integrated 7/25/2001 >1.0 10:55 1.0 LB LB ** 0.5 Surface 84 0.045b 37 1311 1310 LB LB ** 0.5 Surface 83 0.041b 31 1310 1311 LB LB ** 0 - 0.5 Depth 4.1 1314 1313 Integrated LB LB ** 0 - 0.5 Depth 4.5 1313 1314 Integrated 8/23/2001 >1.0 12:52 1.0 LB LB 13:02 0.5 Surface 87 0.065b 43 1404 1403 LB LB 13:02 0.5 Surface 88 0.045b 40 1403 1404 LB LB- 12:55 ** - ** Grab 13.4 1406 1407 Composite LB LB- 12:55 ** - ** Grab 13.5 1407 1406 Composite

109 Old Oaken Bucket Pond (Palis: 94113) Unique_ID: W0953 Station: A Description: Deep hole, southern end of pond, triangulate 160 feet off of two outlet structures, Scituate

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/28/2001 1.1 14:35 1.5 LB -- ** 0.5 Surface 11 0.065b 190 1224 LB -- ** ** Bottom 18 0.1b 280 1225 LB -- ** 0 - ** Depth 6.9 1226 Integrated 7/25/2001 0.8 14:45 1.5 LB -- 14:45 0.5 Surface 12 0.071b 240 1317 LB -- 14:45 1.0 Bottom 14 0.048b 220 1318 LB -- ** 0 - 1.0 Depth 9.5 1319 Integrated 8/23/2001 0.8 10:48 1.8 LB -- 11:35 0.5 Surface 14 0.053b 160 1410 LB -- 11:35 0 - ** Depth 12.6 1412 Integrated 10/2/2001 1.0 10:30 1.5 LB -- 10:30 0.5 Surface 0.055b 1856

Unnamed Tributary Unique_ID: W0927 Station: E, Mile Point: 0.1 Description: unnamed cranberry bog inlet, northern edge of west basin of Monponsett Pond, approximately 325 feet upstream of confluence with pond, Hanson

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 ------LB -- ** -- 0.076 1257 7/19/2001 ------LB- -- 11:45 -- 0.11 1344 8/21/2001 ------LB- -- 14:26 -- 0.40 1443

110 Unnamed Tributary Unique_ID: W0929 Station: H, Mile Point: 0.04 Description: unnamed cranberry bog inlet, upstream of earthberm, middle of western edge of the west basin of Monponsett Pond, Halifax

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 ------LB -- ** -- 0.76 1260 7/19/2001 ------LB- -- 11:03 -- 0.21 1347 8/21/2001 ------LB- -- 13:34 -- 0.32 1445

Unnamed Tributary Unique_ID: W0932 Station: C, Mile Point: 0.03 Description: unnamed swamp inlet at northeast corner of eastern basin of Monponsett Pond, approximately 150 feet upstream/northeast of confluence with pond, Halifax

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 ------LB -- ** -- ##r 1256 7/19/2001 ------LB- -- 13:05 -- ##r 1352 8/21/2001 ------LB- -- 16:02 -- ##r 1441

SNAKE RIVER (Saris: 6235750) Unique_ID: W0949 Station: B, Mile Point: 0.4 Description: at Field Street bridge, Taunton (tributary to Lake Sabbatia, Taunton)

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/27/2001 ------LB- -- 15:25 -- 0.059 1237 7/26/2001 ------LB- -- 15:45 -- 0.048 1330 8/28/2001 ------LB- -- 14:10 -- 0.057 1423

111 WHITE OAK BROOK (Saris: 6236700) Unique_ID: W0928 Station: F, Mile Point: 0.04 Description: approximately225 feet upstream of west basin of Monponsett Pond, Hanson

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 ------LB -- ** -- 0.20 1258 7/19/2001 ------LB- -- 11:20 -- 0.18 1345 8/21/2001 ------LB- -- 13:56 -- 0.085 1444

STETSON BROOK (Saris: 6236725) Unique_ID: W0931 Station: D, Mile Point: 0.02 Description: approximately 150 feet upstream of eastern basin of Monponsett Pond, Halifax

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/20/2001 ------LB -- ** -- 0.079 1255 7/19/2001 ------LB- -- 13:20 -- 0.039 1353 8/21/2001 ------LB- -- 16:29 -- 0.14 1442

WEST MEADOW BROOK/West Meadow Pond (Saris: 6237425) (Palis: 62208) Unique_ID: W0950 Station: A, Mile Point: 3.7 Description: Deep hole, middle of pond, West Bridgewater

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/28/2001 >1.2 10:10 1.2 LB -- ** 0.5 Surface 19 0.026 95 1502 LB -- ** 0 - 0.7 Depth 4.0 1504 Integrated 9/7/2001 >1.0 09:41 1.0 LB -- 10:05 0.5 Surface 17 0.019 65 1598 LB -- 10:05 0 - 0.5 Depth 2.9 1599 Integrated 10/4/2001 ** 10:47 1.5 LB -- 10:45 0.5 Surface 0.036 1867

112 Unnamed Tributary Unique_ID: W0907 Station: FS105, Mile Point: 0.1 Description: unnamed tributary to French Stream approximately 100 feet downstream of outfall pipe (Rockland WWTP discharge about 90% of flow), Rockland. (canal not depicted on 1977 Whitman quad - see April 2001ortho photo)

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 7/3/2001 ------LB- -- 11:29 -- 0.15 1811 8/2/2001 ------LB- -- 10:40 -- 0.15 1831 9/5/2001 ------LB- -- 12:55 -- 0.16 1851

Unnamed Tributary Unique_ID: W0936 Station: D, Mile Point: 0.05 Description: approximately 250 feet upstream on an unnamed tributary at southern end of Wampatuck Pond, Hanson

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/21/2001 ------LB- -- 17:02 -- 0.12 1291 7/17/2001 ------LB- -- 12:15 -- 0.15 1384 8/30/2001 ------LB- -- 15:03 -- 0.12 1477

Unnamed Tributary Unique_ID: W0937 Station: C, Mile Point: 0.05 Description: approximately 250 feet upstream on an unnamed tributary at southeastern end of Wampatuck Pond, Hanson (tributary not shown on 1978 Hanover quad, point is accurate overlayed on 2001 ortho photo)

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/21/2001 ------LB- -- 16:07 -- 0.18 1290 7/17/2001 ------LB- -- 11:57 -- 0.14 1383 8/30/2001 ------LB- -- 14:50 -- 0.16 1476

113 Unnamed Tributary Unique_ID: W0952 Station: B, Mile Point: 0.03 Description: Unnamed inlet to Musquashcut Pond at Mann Hill Road, Scituate

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/28/2001 ------LB- -- 11:40 -- 0.13 1223 7/25/2001 ------LB- -- 13:50 -- 0.26 1316 8/23/2001 ------LB- -- 14:15 -- 0.14 1409

INDIAN HEAD BROOK (Saris: 9456875) Unique_ID: W0934 Station: B, Mile Point: 2.7 Description: at southeastern end of Wampatuck Pond where brook enters pond (impoundment) through culvert, Hanson

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/21/2001 ------LB- -- 15:53 -- 0.18 1289 7/17/2001 ------LB- -- 11:47 -- 0.090 1382 8/30/2001 ------LB- -- 14:42 -- 0.12 1475

114 INDIAN HEAD BROOK/Wampatuck Pond (Saris: 9456875) (Palis: 94168) Unique_ID: W0935 Station: A, Mile Point: 2.3 Description: Deep hole northern end of Wampatuck Pond (impoundment of Indian Head Brook), midway between island and eastern shore, Hanson

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 6/21/2001 0.7 15:21 1.7 LB -- ** 0.5 Surface 12 0.12b 210m 1285 LB -- ** ** Bottom 11 0.12b 180m 1286 LB -- ** 0 - ** Depth 22.4 1287 Integrated 7/17/2001 0.4 10:59 1.5 LB -- 11:00 0.5 Surface 11.0 0.14b 240h 1378 LB -- 11:05 1.0 Bottom 11 0.14b 260h 1379 LB -- 11:10 0 - 1.0 Depth 39.7 1380 Integrated 8/30/2001 0.4 14:15 1.5 LB -- 14:15 0.5 Surface 19 0.11b 180 1471 LB -- 14:29 1.0 Bottom 13 0.10b 210 1472 LB -- 14:30 0 - 1.0 Depth 128 1473 Integrated 10/2/2001 0.5 12:40 1.5 LB -- 12:38 0.5 Surface 0.10b 1858

DRINKWATER RIVER (Saris: 9456900) Unique_ID: W0956 Station: C, Mile Point: 1.1 Description: inlet to Forge Pond, Drinkwater River just upstream of confluence with French Stream, Hanover

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 7/3/2001 ------LB -- 11:03 -- 0.078 1810 8/2/2001 ------LB -- 15:24 -- 0.048 1830 9/5/2001 ------LB -- 12:22 -- 0.053 1850

115 DRINKWATER RIVER/Forge Pond (Saris: 9456900) (Palis: 94037) Unique_ID: W0954 Station: A, Mile Point: 0.6 Description: Deep hole, southeast quadrant of pond, Hanover

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 7/3/2001 1.1 10:01 2.2 LB LB 10:05 0.5 Surface 13 0.080 230m 1803 1804 LB LB 10:08 0.5 Surface 13 0.089 280m 1804 1803 LB -- 10:10 2.0 Bottom 13 0.089 260m 1805 LB LB- 10:13 0 - 1.5 Depth 2.0f 1807 1806 Integrated LB LB- 10:13 0 - 1.5 Depth 1.4f 1806 1807 Integrated 8/2/2001 1.4 12:23 1.5 LB LB 12:48 0.5 Surface 34 0.047 75h 1823 1824 LB LB 12:49 0.5 Surface 34 0.049 70h 1824 1823 LB -- 13:15 1.0 Bottom 34 0.072 65h 1825 LB LB- 13:00 0 - 0.9 Depth 18.5 1826 1827 Integrated LB LB- 13:01 0 - 0.9 Depth 21.4 1827 1826 Integrated 9/5/2001 0.8 10:30 1.8 LB LB 11:05 0.5 Surface 26 0.085 110 1844 1843 LB LB 11:05 0.5 Surface 26 0.083 120 1843 1844 LB -- 11:10 1.3 Bottom 26 0.086 120 1845 LB LB- 11:15 0 - 1.3 Depth 35.7 1846 1847 Integrated LB LB- 11:20 0 - 1.3 Depth 36.3 1847 1846 Integrated

FRENCH STREAM (Saris: 9456950) Unique_ID: W0906 Station: FS104, Mile Point: 0.001 Description: approximately 30 feet upstream of confluence with Drinkwater River, Hanover

Date Secchi Secchi Station OWMID QAQC Time Sample Relative Alkalinity TP Apparent Chl a Time Depth Depth Depth Color m 24hr m 24hr m mg/l mg/l PCU mg/m3 7/3/2001 ------LB -- 11:01 -- 0.084 1809 8/2/2001 ------LB -- 15:36 -- 0.080 1829 9/5/2001 ------LB -- 12:15 -- 0.081 1849

116 Table 5. TMDL Baseline Lake Monitoring, Equipment Blanks 2001 (QC Status: 4)

TMDL Baseline Lakes Survey (2001) (QC Status: 4) Exported: 6/8/2004 11:29:05 AM Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/19/2001 LB-1201 Blank 09:50 -- <2 <0.005 <15 6/19/2001 LB-1202 Blank 09:50 -- <1.0 6/20/2001 LB-1243 Blank ** -- <2 0.017b <15 6/20/2001 LB-1244 Blank ** -- <1.0 6/21/2001 LB-1277 Blank ** -- <2 0.030b <15m 6/26/2001 LB-1493 Blank ** -- <2 0.038b <15 6/26/2001 LB-1494 Blank ** -- <1.0 6/26/2001 LB-1262 Blank 12:10 -- <2 0.021b <15h 6/26/2001 LB-1263 Blank 13:10 -- ##h 6/27/2001 LB-1229 Blank ** -- <2 0.025b <15 6/27/2001 LB-1230 Blank ** -- <1.0 6/27/2001 LB-1480 Blank ** -- <2 0.027b <15 6/27/2001 LB-1481 Blank ** -- <1.0 6/28/2001 LB-1215 Blank ** -- <2 <0.005 <15 6/28/2001 LB-1216 Blank ** -- <1.0 6/28/2001 LB-1506 Blank ** -- <2 0.038b <15 6/28/2001 LB-1507 Blank ** -- <1.0 7/3/2001 LB-1801 Blank ** -- <2 <0.005 <15m 7/17/2001 LB-1371 Blank 14:00 -- <1.0 7/17/2001 LB-1370 Blank 14:30 -- <2 0.048b <15h 7/18/2001 LB-1294 Blank 11:05 -- <2 <0.005 <15h 7/18/2001 LB-1295 Blank 11:05 -- <1.0 7/19/2001 LB-1336 Blank ** -- <2 <0.005 <15h 7/19/2001 LB-1337 Blank ** -- <1.0 7/24/2001 LB-1355 Blank ** -- <2 <0.005 <15 7/24/2001 LB-1356 Blank ** -- <1.0 7/25/2001 LB-1309 Blank ** -- <1.0 7/25/2001 LB-1308 Blank 10:55 -- <2 0.042b <15 7/26/2001 LB-1322 Blank 13:45 -- <2 <0.005 <15h 7/26/2001 LB-1323 Blank 13:45 -- <1.0 7/31/2001 LB-1535 Blank 12:46 -- <2 <0.005 <15 7/31/2001 LB-1536 Blank 12:46 -- <1.0 8/1/2001 LB-1522 Blank 09:50 -- <2 <0.005 <15 8/1/2001 LB-1523 Blank 09:53 -- <1.0 8/2/2001 LB-1821 Blank 11:44 -- <2 <0.005 <15h 8/2/2001 LB-1822 Blank 11:45 -- <1.0 8/9/2001 LB-1548 Blank 09:30 -- <2 <0.005 <15 8/9/2001 LB-1549 Blank 09:40 -- <1.0 8/21/2001 LB-1430 Blank 09:50 -- <1.0 8/21/2001 LB-1429 Blank 09:53 -- <2 0.018b <15 8/22/2001 LB-1387 Blank 11:50 -- <2 0.033b <15 8/22/2001 LB-1388 Blank 11:50 -- <1.0 8/22/2001 LB-1400 Blank 14:45 -- <0.005 8/23/2001 LB-1401 Blank 13:02 -- <2 0.015b <15 8/23/2001 LB-1402 Blank 13:02 -- <1.0 8/28/2001 LB-1415 Blank ** -- <2 0.018b <15 8/28/2001 LB-1416 Blank ** -- <1.0 8/28/2001 LB-1611 Blank ** -- <0.005 8/29/2001 LB-1448 Blank 10:00 -- <2 <0.005 <15 8/29/2001 LB-1449 Blank 10:00 -- <1.0

117 Date OWMID QAQC Time Depth ALK TP COLOR CHL-A 8/29/2001 LB-1612 Blank 14:00 -- 0.022b 8/30/2001 LB-1463 Blank 11:20 -- <2 <0.005 <15 8/30/2001 LB-1464 Blank 11:25 -- <1.0 8/30/2001 LB-1610 Blank 14:00 -- 0.021b 9/4/2001 LB-1564 Blank 10:15 -- <2 <0.005 <15 9/4/2001 LB-1565 Blank 10:17 -- <1.0 9/4/2001 LB-1614 Blank 11:42 -- 0.029b 9/5/2001 LB-1841 Blank 11:00 -- <2 <0.005 <15 9/5/2001 LB-1842 Blank 11:00 -- <1.0 9/6/2001 LB-1577 Blank 10:58 -- <2 0.005 <15 9/6/2001 LB-1578 Blank 10:59 -- <1.0 9/7/2001 LB-1613 Blank 10:00 -- <0.005 9/7/2001 LB-1590 Blank 11:40 -- <2 0.027b <15 9/7/2001 LB-1591 Blank 11:40 -- <1.0 10/2/2001 LB-1853 Blank 09:30 -- <0.005h 10/4/2001 LB-1861 Blank 09:10 -- <0.005

118 Table 6. TMDL Baseline Lake Monitoring, Field Duplicates 2001 (QC Status: 4) TMDL Baseline Lakes Survey (2001) (QC Status: 4) Exported: 6/8/2004 3:39:50 PM Congamond Lakes (Palis: 32021) Unique_ID: W0923 Station: A Description: Deep hole, center of Middle Basin, Southwick Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/19/2001 LB-1203 LB-1204 11:55 0.5 11d 0.021 16 6/19/2001 LB-1204 LB-1203 ** 0.5 20d 0.021 22 6/19/2001 LB-1206 LB-1207 ** 0 - ** 8.6 6/19/2001 LB-1207 LB-1206 ** 0 - ** 10.4 Relative Percent Difference 58.1% 0.0% 31.6% 18.9%

7/18/2001 LB-1296 LB-1297 11:30 0.5 43 0.017 <15h 7/18/2001 LB-1297 LB-1296 11:35 0.5 43 0.016 <15h 7/18/2001 LB-1299 LB-1300 12:24 0 - 8.1 12.9 7/18/2001 LB-1300 LB-1299 12:26 0 - 8.1 12.1 Relative Percent Difference 0.0% 6.1% 0.0% 6.4%

8/22/2001 LB-1389 LB-1390 12:15 0.5 43 0.020b 18 8/22/2001 LB-1390 LB-1389 12:15 0.5 44 0.019b 22 8/22/2001 LB-1392 LB-1393 12:45 0 - 7.2 16.7 8/22/2001 LB-1393 LB-1392 12:50 0 - 7.2 15.6 Relative Percent Difference 2.3% 5.1% 20.0% 6.8%

Ames Long Pond (Palis: 62001) Unique_ID: W0940 Station: A Description: Deep hole, southern end of southern basin of pond, Easton Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/26/2001 LB-1495 LB-1496 ** 0.5 7 0.015bd <15d 6/26/2001 LB-1496 LB-1495 ** 0.5 7 0.034bd 27d 6/26/2001 LB-1498 LB-1499 ** 0 - 2.0 1.9 6/26/2001 LB-1499 LB-1498 ** 0 - 2.0 1.2 Relative Percent Difference 0.0% 77.6% 57.1% 45.2%

7/31/2001 LB-1537 LB-1538 13:20 0.5 9 0.014 43 7/31/2001 LB-1538 LB-1537 13:21 0.5 8 0.014 43 7/31/2001 LB-1540 LB-1541 13:25 0 - 1.7 5.3 7/31/2001 LB-1541 LB-1540 13:27 0 - 1.7 5.2 Relative Percent Difference 11.8% 0.0% 0.0% 1.9%

9/6/2001 LB-1579 LB-1580 11:35 0.5 8 0.009 24 9/6/2001 LB-1580 LB-1579 11:35 0.5 9 0.009 24 9/6/2001 LB-1582 LB-1583 11:30 0 - 1.6 4.3 9/6/2001 LB-1583 LB-1582 11:30 0 - 1.6 2.6 Relative Percent Difference 11.8% 0.0% 0.0% 49.3%

119 Lake Sabbatia (Palis: 62166) Unique_ID: W0948 Station: A Description: Deep hole, approximately 900 feet southeast of boat ramp, Taunton Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/27/2001 LB-1231 LB-1232 ** 0.5 12 0.037b 75 6/27/2001 LB-1232 LB-1231 ** 0.5 10 0.033b 80 6/27/2001 LB-1234 LB-1235 ** 0 - 6.0 <1.0 6/27/2001 LB-1235 LB-1234 ** 0 - 6.0 <1.0 Relative Percent Difference 18.2% 11.4% 6.5% 0.0%

7/26/2001 LB-1324 LB-1325 14:14 0.5 12 0.028 100h 7/26/2001 LB-1325 LB-1324 14:14 0.5 12 0.031 110h 7/26/2001 LB-1327 LB-1328 15:10 0 - 6.0 1.1 7/26/2001 LB-1328 LB-1327 15:10 0 - 6.0 <1.0 Relative Percent Difference 0.0% 10.2% 9.5% 9.5%

8/28/2001 LB-1417 LB-1418 ** 0.5 11 0.022b 50 8/28/2001 LB-1418 LB-1417 ** 0.5 11 0.026b 60 8/28/2001 LB-1420 LB-1421 ** 0 - ** 2.3 8/28/2001 LB-1421 LB-1420 ** 0 - ** 2.6 Relative Percent Difference 0.0% 16.7% 18.2% 12.2%

Monponsett Pond (Palis: 62119) Unique_ID: W0926 Station: A Description: Deep hole, center of southern portion of west basin of pond, Halifax Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/20/2001 LB-1245 LB-1246 ** 0.5 8 0.057b 65 6/20/2001 LB-1246 LB-1245 ** 0.5 8 0.048b 65 6/20/2001 LB-1248 LB-1249 ** 0 - 3.3 14.6 6/20/2001 LB-1249 LB-1248 ** 0 - 3.3 16.8 Relative Percent Difference 0.0% 17.1% 0.0% 14.0%

7/19/2001 LB-1338 LB-1339 ** 0.5 10 0.066 85h 7/19/2001 LB-1339 LB-1338 ** 0.5 10 0.066 75h 7/19/2001 LB-1341 LB-1342 ** 0 - ** 22.6 7/19/2001 LB-1342 LB-1341 ** 0 - ** 22.0 Relative Percent Difference 0.0% 0.0% 12.5% 2.7%

8/21/2001 LB-1431 LB-1432 12:04 0.5 10 0.055b 100 8/21/2001 LB-1432 LB-1431 12:08 0.5 12 0.056b 95 8/21/2001 LB-1434 LB-1435 12:16 0 - 2.1 200d 8/21/2001 LB-1435 LB-1434 12:19 0 - 2.1 70d Relative Percent Difference 18.2% 1.8% 5.1% 96.3%

Watson Pond (Palis: 62205) Unique_ID: W0947 Station: A Description: Deep hole, center of pond, approximately 275 feet south from north central shore, Taunton Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 10/4/2001 LB-1862 LB-1863 09:12 0.5 0.064 10/4/2001 LB-1863 LB-1862 09:14 0.5 0.069 Relative Percent Difference 7.5%

120 Assabet River Reservoir (Palis: 82004) Unique_ID: W0938 Station: A Description: Deep hole, center of eastern lobe, Westborough Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/26/2001 LB-1264 LB-1265 14:20 0.5 11d 0.019b 37h 6/26/2001 LB-1265 LB-1264 14:25 0.5 22d 0.018b 37h 6/26/2001 LB-1267 LB-1268 14:46 0 - ** ##h 6/26/2001 LB-1268 LB-1267 14:46 0 - ** ##h Relative Percent Difference 66.7% 5.4% 0.0%

7/24/2001 LB-1357 LB-1358 ** 0.5 15 0.022 34 7/24/2001 LB-1358 LB-1357 ** 0.5 15 0.022 38 7/24/2001 LB-1360 LB-1361 ** 0 - ** 4.3d 7/24/2001 LB-1361 LB-1360 ** 0 - ** 6.8d Relative Percent Difference 0.0% 0.0% 11.1% 45.0%

8/29/2001 LB-1450 LB-1451 10:50 0.5 17 ##d 43 8/29/2001 LB-1451 LB-1450 10:50 0.5 16 ##d 39 8/29/2001 LB-1453 LB-1454 11:11 0 - 2.7 28.8 8/29/2001 LB-1454 LB-1453 11:13 0 - 2.7 34.2 Relative Percent Difference 6.1% 9.8% 17.1%

Farm Pond (Palis: 82035) Unique_ID: W0946 Station: A Description: Deep hole, southeast quadrant of pond, Framingham Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/28/2001 LB-1508 LB-1509 ** 0.5 33 0.019b 24 6/28/2001 LB-1509 LB-1508 ** 0.5 34 0.013b 27 6/28/2001 LB-1511 LB-1512 ** 0 - 5.4 10.2 6/28/2001 LB-1512 LB-1511 ** 0 - 5.4 13.0 Relative Percent Difference 3.0% 37.5% 11.8% 24.1%

8/9/2001 LB-1550 LB-1551 09:30 0.5 36 0.015 18 8/9/2001 LB-1551 LB-1550 09:35 0.5 35 0.015 <15 8/9/2001 LB-1553 LB-1554 10:10 0 - 5.5 22.0 8/9/2001 LB-1554 LB-1553 10:10 0 - 5.5 22.3 Relative Percent Difference 2.8% 0.0% 18.2% 1.4%

9/7/2001 LB-1592 LB-1593 12:15 0.5 41 0.022b 28 9/7/2001 LB-1593 LB-1592 12:15 0.5 41 0.021b 27 9/7/2001 LB-1595 LB-1596 12:25 0 - 3.5 6.6 9/7/2001 LB-1596 LB-1595 12:25 0 - 3.5 4.6 Relative Percent Difference 0.0% 4.7% 3.6% 35.7%

121 Heard Pond (Palis: 82058) Unique_ID: W0944 Station: A Description: Deep hole, northeast quadrant of pond, Wayland Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/27/2001 LB-1482 LB-1483 ** 0.5 19 0.026b 37 6/27/2001 LB-1483 LB-1482 ** 0.5 19 0.022b 37 6/27/2001 LB-1485 LB-1486 ** 0 - 2.1 22.4 6/27/2001 LB-1486 LB-1485 ** 0 - 2.1 24.6 Relative Percent Difference 0.0% 16.7% 0.0% 9.4%

8/1/2001 LB-1524 LB-1525 10:10 0.5 34d 0.043 43 8/1/2001 LB-1525 LB-1524 10:10 0.5 25d 0.038 43 8/1/2001 LB-1527 LB-1528 10:15 0 - 1.5 17.4 8/1/2001 LB-1528 LB-1527 10:15 0 - 1.5 16.8 Relative Percent Difference 30.5% 12.3% 0.0% 3.5%

9/4/2001 LB-1566 LB-1567 10:45 0.5 24 0.075 70 9/4/2001 LB-1567 LB-1566 10:46 0.5 24 0.074 70 9/4/2001 LB-1569 LB-1570 10:49 0 - 1.5 29.8 9/4/2001 LB-1570 LB-1569 10:50 0 - 1.5 26.7 Relative Percent Difference 0.0% 1.3% 0.0% 11.0%

Jacobs Pond (Palis: 94077) Unique_ID: W0941 Station: A Description: Deep hole, southern end of pond, Norwell Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 10/2/2001 LB-1854 LB-1855 09:33 0.5 0.034h 10/2/2001 LB-1855 LB-1854 09:35 0.5 0.034h Relative Percent Difference 0.0%

Lower Chandler Pond (Palis: 94091) Unique_ID: W0933 Station: A Description: Deep hole in southwest corner of pond, approximately 100 feet from outfall and road, Duxbury/Pembroke. Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/21/2001 LB-1279 LB-1280 ** 0.5 8 0.042b 110m 6/21/2001 LB-1280 LB-1279 ** 0.5 7 0.042b 120m 6/21/2001 LB-1282 LB-1283 ** 0 - ** 5.8 6/21/2001 LB-1283 LB-1282 ** 0 - ** 5.5 Relative Percent Difference 13.3% 0.0% 8.7% 5.3%

7/17/2001 LB-1372 LB-1373 14:35 0.5 7 0.054b 130dh 7/17/2001 LB-1373 LB-1372 14:40 0.5 8 0.054b 100dh 7/17/2001 LB-1375 LB-1376 15:13 0 - 1.9 12.5 7/17/2001 LB-1376 LB-1375 ** 0 - 1.9 12.7 Relative Percent Difference 13.3% 0.0% 26.1% 1.6%

8/30/2001 LB-1465 LB-1466 12:00 0.5 9 0.036d 150d 8/30/2001 LB-1466 LB-1465 12:00 0.5 9 0.045d 120d 8/30/2001 LB-1468 LB-1469 12:15 0 - 1.5 19.2 8/30/2001 LB-1469 LB-1468 12:20 0 - 1.5 18.2 Relative Percent Difference 0.0% 22.2% 22.2% 5.3%

122 Musquashcut Pond (Palis: 94105) Unique_ID: W0951 Station: A Description: Deep hole, approximately 250 feet southeast of Seagate Circle peninsula, Scituate Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 6/28/2001 LB-1217 LB-1218 ** 0.5 69 0.10 39d 6/28/2001 LB-1218 LB-1217 ** 0.5 69 0.11 60d 6/28/2001 LB-1220 LB-1221 ** 0 - 0.5 23.2 6/28/2001 LB-1221 LB-1220 ** 0 - 0.5 25.0 Relative Percent Difference 0.0% 9.5% 42.4% 7.5%

7/25/2001 LB-1310 LB-1311 ** 0.5 83 0.041b 31 7/25/2001 LB-1311 LB-1310 ** 0.5 84 0.045b 37 7/25/2001 LB-1313 LB-1314 ** 0 - 0.5 4.5 7/25/2001 LB-1314 LB-1313 ** 0 - 0.5 4.1 Relative Percent Difference 1.2% 9.3% 17.6% 9.3%

8/23/2001 LB-1403 LB-1404 13:02 0.5 88 0.045b 40 8/23/2001 LB-1404 LB-1403 13:02 0.5 87 0.065b 43 8/23/2001 LB-1406 LB-1407 12:55 ** - ** 13.4 8/23/2001 LB-1407 LB-1406 12:55 ** - ** 13.5 Relative Percent Difference 1.1% 36.4% 7.2% 0.7%

DRINKWATER RIVER/Forge Pond (Saris: 9456900) (Palis: 94037) Unique_ID: W0954 Station: A, Mile Point: 0.6 Description: Deep hole, southeast quadrant of pond, Hanover Date OWMID QAQC Time Depth ALK TP COLOR CHL-A (24hr) (m) mg/l mg/l PCU mg/m3 7/3/2001 LB-1803 LB-1804 10:05 0.5 13 0.080 230m 7/3/2001 LB-1804 LB-1803 10:08 0.5 13 0.089 280m 7/3/2001 LB-1806 LB-1807 10:13 0 - 1.5 1.4f 7/3/2001 LB-1807 LB-1806 10:13 0 - 1.5 2.0f Relative Percent Difference 0.0% 10.7% 19.6% 35.3%

8/2/2001 LB-1823 LB-1824 12:48 0.5 34 0.047 75h 8/2/2001 LB-1824 LB-1823 12:49 0.5 34 0.049 70h 8/2/2001 LB-1826 LB-1827 13:00 0 - 0.9 18.5 8/2/2001 LB-1827 LB-1826 13:01 0 - 0.9 21.4 Relative Percent Difference 0.0% 4.2% 6.9% 14.5%

9/5/2001 LB-1843 LB-1844 11:05 0.5 26 0.083 120 9/5/2001 LB-1844 LB-1843 11:05 0.5 26 0.085 110 9/5/2001 LB-1846 LB-1847 11:15 0 - 1.3 35.7 9/5/2001 LB-1847 LB-1846 11:20 0 - 1.3 36.3 Relative Percent Difference 0.0% 2.4% 8.7% 1.7%

123 References

MA DEP. CN 42.0 2000 TMDL Baseline Lake Survey Quality Assurance Project Plan. Massachusetts Department of Environmental Protection, Division of Watershed Management, Worcester, MA.

MA DEP. CN 149.0 DATA VALIDATION REPORT for Year 2001 Project Data. Massachusetts Department of Environmental Protection, Division of Watershed Management, Worcester, MA.

Hartley, R. 2002. Lakes Survey for TMDL Development. Mass. Div. Fisheries and Wildlife. Westboro, MA.

USGS, 2001. Scolow, R.S., J.S. Whitney, D. Murino Jr., and L.R. Ramsbey. Water Resources Data Massachusetts and Rhode Island Water Year 2000. Water-Data Report MA-RI-00-1. USGS, Northborough, MA 01532.

124 Appendix I. Macrophyte Species Codes.

Plant species (common name) Code | Plant species (common name) Code

Macroscopic algae (mats, clumps, etc.) ∆ Najas sp. “Bushy Pondweed” or Naiad” J Chara sp. “Muskgrass” ∆1 Ruppia maritima “Widgeon Grass” J1 Nitella sp. “Stonewort” ∆2 Najas flexilis “Slender Naiad” J2 Bryozoan ∆3 Najas minor “European Naiad” J3 Najas guadalupensis “Naiad” J4 Moss Najas gracillima J5 Riccia fluitans “Slender Riccia” Μ1 Ricciocarpus natans “Purple-fringed Riccia” Μ2 Alisma sp. “Water-Plantain” A1 Other aquatic ferns Ν Echinodorus sp. “Burhead” A2 Osmunda regalis “Royal Fern” Ν1 Sagittaria sp. “Arrowhead” or “Duck Potato” A3 Marsilea quadrofolia “Pepperwort” Ν2 Sagittaria sp. (submerged form only) A4 Azolla caroliniana “Water-velvet” Ν3 S. latifolia “Common Arrowhead” A5 Salvinia rotundifolia “Floating Moss” Ν4 S. rigida “Stiff Arrowhead” A6 S. teres “Dwarf Wapato A7 Isoetes sp. “Quillwort” I S. graminea “Grassy Arrowhead” A8 I. tuckermani “Quillwort” I1 Vallisneria americana “Wild Celery” or “Tape Grass” H1 Typha latifolia “Common Cattail” T Elodea sp. “Waterweed” H2 Typha angustifolia “Narrow-leaved Cattail” T1 E. nattallii “Waterweed” H3 Typha glauca “Hybrid Cattail” T2 E. canadensis “Canadian Waterweed” H4 Egeria densa “Brazilian elodea” H5

Sparganium sp. “Bur Reed” S Gramineae (Grass Family) G S. fluctuans “Water Bur Reed” S1 S. eurycarpum “Giant Bur Reed” S2 Cyperus sp. “Flat Sedge” Y1 S. americanum “Bur Reed” S3 Dulichium arundinaceum “Three-way Sedge” Y2 Fimbristylis sp. “Fimbristylis” Y3 Potamogeton sp. “Pondweed” P Rynchospora sp. “Beak Rush” Y4 P. amplifolias “Largeleaf Pondweed” P1 Cladium sp. “Twig Rush” or “Sawgrass” Y5 P. crispus “Curlyleaf Pondweed” P2 P. richardsonii “Richardson Pondweed” P3 Carex sp. X P. robbinsii “Flatleaf Pondweed” P4 P. epihydrus “Ribbonleaf Pondweed” P5 Scirpus sp. “Bulrush” B P. sp. “Thin-leaved Pondweed” P6 S. validus “Softstem Bulrush” B1 P. gramineus “Grassleaf Pondweed” P7 S. cyperinus “Woolgrass Bulrush” B2 P. natans “Floatingleaf Pondweed” P8 S. americanus “American Bulrush” B3 P. vaseyi “Vasey’s Pondweed” P9 S. atrovirens “Dark-green Bulrush” B4 P. capillaceus “Pondweed” P10 S. subterminalis B5 P. folisus “Leafy Pondweed” P11 P. tenuifolius “Pondweed” P12 Eleocharis sp. “Spike Rush” E P. perfoliatus “Redhead Grass” P13 E. acicularis “Needle Spike Rush” E1 P. pusillus “Slender Pondweed” or “Baby P14 E. smallii “Spike Rush” E2 Pondweed”

125 P. spirillus “Snailseed Pondweed” P15 E. palustris “Common Spike Rush” E3 P. pectinatus “Sago Pondweed” P16 P. illinoensis “Illinois Pondweed” P17 Peltandra virginica “Arrow Arum” a1 P. pulcher “Heartleaf Pondweed” P18 Calla palustris “Water Arum” a2 P. bicupulatus “Snailseed Pondweed” P19 Orontium aquaticum “Golden Club” a3 P. zosteriformis “Flatstem Pondweed” P20 Acorus calamus “Sweet Flag” a4 P. nodosus P21 P. oakesianus P22 Spirodela polyrhiza “Big Duckweed” L1 Subularia aquatica “Awlwort” M1 Wolffia sp. “Watermeal” L2 Neobeckia aquatica “Lake Cress” M2 Wolffiella floridana “Florida Wolffiella” L3 Cardamine sp. “Bitter Cress” M3 Lemna sp. “Duckweed” L4 Rorippa sp. “Water Cress” M4 L. minor “Common Duckweed” L5 L. trisulca “Star Duckweed” L6 Podostenum sp. “River Weed” r

Xyris sp. “Yellow-eyed Grass” e Callitriche sp. “Water Starwort” k1 Eriocaulon sp. “Pipewort” e1 Elatine sp. “Waterwort” k2 E. septangulare “Pipewort” e2 Viola sp. “Violet” k3 Heteranthera dubia “Mud Plantain” W1 Hypericum sp. “St. John’s-wort” k4 Pontederia cordata “Pickerelweed” W2 H. boreale f. callitrichoides “St. John’s-wort” k5 P. cordata forma taenia “Pickerelweed” W3 Decodon verticillatus “Swamp Loosestrife” V1 Iris sp. “Iris” j1 Trapa natans “Water Chestnut” V2 Juncus sp. “Rush” j2 Ludwigia sp. “False Loosestrife” V3 Saururus cernuus “Lizard’s tail” j3 Lythrum salicaria “Purple or Spiked Loosestrife” V4 Rhexia virginica “Virginia Meadow-beauty” V5 Rumex sp. “Dock” Q1 Hippuris vulgaris “Mare’s-tail” h1 Polygonum sp. “Smartweed” Q2 Prosperinaca sp. “Mermaid Weed” h2 Myriophyllum sp. “Water Milfoil h3 Salix sp. “Willow” b1 M. heterophyllum “Broadleaf Water Milfoil” h4 Myrica gale “Sweet Gale” b2 M. humile “Water Milfoil” h5 Alnus sp. “Alder” b3 M. tenellum “Leafless Milfoil” h6 Nyssa sp. “Sour Gum” or “Tupelo” b4 M. spicatum h7 Cornus sp. “Dogwood” b5 Chamaedaphne calyculata “Leatherleaf” b6 Sium suave “Water Parsnip” f1 Fraxinus sp. “Ash” b7 Hydrocotyle sp. “Water Pennywort” f2 Cephalanthus occidentalis “Buttonbush” b8 Cicuta sp. “Water Hemlock” f3 Ilex verticillata “Virginia Winterberry” or “Black b9 Alder” Clethra alnifolia “Sweet Pepperbush” b10 Hottonia inflata “Featherfoil” m1 Samolus sp. “Water Pimpernel” m2 Ceratophyllum sp. “Coontail” C Lysimachia sp. “Loosestrife” m3 Ceratophyllum demersum “Coontail” C1 L. ciliata “Loosestrife” m4 C. echinatum C2 Nymphoides cordatum “Floating Heart” g1 Nymphaea sp. “Water Lily” N1 Asclepias sp. “Milkweed” g2 N. odorata “Fragrant Water Lily” N2 Myosotis sp. “Forget-me-not” g3 N. tuberosa “White Water Lily” N3 Nuphar sp. “Yellow Water Lily”, or N5 Stachys sp. “Hedge Nettle” t1 “Spatterdock” N. variegatum “Painted Cow Lily” N6 Scutellaria sp. “Skullcap” t2

126 Physostegia sp. “False Dragonhead” t3 Brasenia schreberi “Water Shield” n1 Lycopus sp. “Water Horehound” t4 Nelumbo lutea “American Lotus” n2 Mentha sp. “Mint” t5 Cabomba caroliniana “Fanwort” n3 Solanum dulcamara “Nightshade” t6

Caltha palustris ”Marsh Marigold” R1 Utricularia sp. “Bladderwort” U Myosurus minimus “Mousetail” R2 U. vulgaris “Common Bladderwort” U1 Ranunculus sp. “Buttercup” or “Crowfoot” R3 U. purpurea “Purple Bladderwort” U2 U. radiata “Floating Bladderwort” U3 U. intermedia “Flat-leaved Bladderwort” U4 Bacopa sp. “Water Hyssop” F1 Megalodonta beckii “Water Marigold” Z1 Limosella sp. “Mudwort” F2 Eupatorium sp. “Joe-pye Weed” Z2 Veronica sp. “Speedwell” F3 Bidens sp. “Bur Marigold”, “Beggar-ticks”, Z3 Chelone sp. “Turtlehead” F4 Helenium sp. “Sneezeweed” Z4 Mimulus sp. “Monkey Flower” F5 Solidago sp. “Goldenrod” Z5 Lindernia sp. “False Pimpernel” F6 Aster sp. “Aster” Z6 Gratiola sp. “Hedge Hyssop” F7 Coreopis rosea “Pink Tickseed” Z7 G. virginiana “Hedge Hyssop” F8 Equisetum sp. “Horsetail” i Lobelia sp. O E. fluviatile “Swamp or Water Horsetail” i1 L. cardinalis “Cardinal Flower” O1 L. dortmanna “Water Lobelia” O2 Drosera rotundifolia “Roundleaf Sundew” D

Vaccinium sp. “Cranberry” d

Phragmites sp. “Reed Grass” q

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