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Dissolved Oxygen (mg/1) or Temperature (C) <br /> Santuit Pond 0 5 10 15 20 25 <br /> 0 <br /> Mashpee <br /> MA-718 0.5 <br /> 1 —r—Temperature <br /> 1.5 <br /> Acreage: 170.5 2 <br /> Maximum Depth: 9 ft <br /> 2001 Secchi Dip: 7.5 ft 2'5 <br /> Lake Association: None <br /> Dissolved Oxygen and Temperature <br /> OVERVIEW Santuit Pond;2001 <br /> Santuit Pond is relatively shallow and is located about a mile north of Route 28 and east of <br /> Route 130 in northeastern Mashpee. Public access is a town right-of-way, dirt ramp at the end of <br /> Hornbeam Street, which is off Sandwich/Cotuit Road. .The last fisheries survey in 1979 recorded <br /> nine species, including: largemouth bass, chain pickerel, golden shiner, yellow perch, pumpkinseed, <br /> alewife, brown bullhead, white sucker and white perch. <br /> WATER QUALITY <br /> The lake was sampled in 1948, 1980, 2001, and 2002. All the profiles show consistent temperatures <br /> from top to bottom, as would be expected in a shallow pond. The 1948 and 2001 profiles show dissolved <br /> oxygen(DO)concentrations near saturation,while the 1980 profile has anoxic conditions at a depth of 2 in. <br /> Surface chlorophyll a and TP concentrations from the 2001 PALS snapshot (see below) are above current <br /> Cape Cod "impacted" thresholds,while the TN concentration is twice its current threshold. A Carlson TSI <br /> based on a surface chlorophyll a concentration places at the upper end of the oligotrophic with deep anoxia <br /> category. <br /> Santuit Pond presents as a shallow, slightly nutrient enriched pond with some water quality concerns <br /> that could be resolved with additional monitoring. Additional regular monitoring throughout a summer <br /> either by volunteers or through the use of continuous monitoring instrument would be necessary to deter- <br /> mine what conditions are necessary to achieve the anoxic conditions observed in 1980. Given the clarity <br /> nearly to the bottom and the high TN concentrations,the ecosystem in Santuit Pond would rapidly respond <br /> to any additions of phosphorus. It is recommended that the town consider regular monitoring, as well as a <br /> land use assessment to determine whether additional phosphorus loads are likely in the future. <br /> 2001 PALS Snapshot Results <br /> Depth pH Chlorophyll a Alkalinity. Total Phosphorus Total Nitrogen <br /> meters L as in CaCO3/L m L <br /> 0.5 6.48 2.23 10.8 17.3 0.65 <br /> 1.5 6.54 2.71 11.1 18.9 0.46 <br />