Forest Lake Association, Methuen

<u>Aquatic Control Technology report:</u>( see Weed Mitigation below) Note the following 3 items<br>1. "Total Kjeldal Nitrogen (TKN) values reported for Forest Lake were below the aforementioned threshold, however, elevated TKN levels were reported in the 7m sample. Elevated levels of TKN are anticipated in the hypoliminion and are the result of decomposition of organic material on the lake bottom."

<br>2. "Phosphorus can enter an aquatic system in different ways; for example, phosphorus can be introduced into the waterbody from the watershed (the land area surrounding the lake that funnels rainwater to the lake) either from a specific source or from non-point origins. <b>More comprehensive testing would need to be performed to better understand current phosphorus loading.</b>"

<br>3. "High e. coli counts reported in the 7m sample indicate a fair amount of bacteria "trapped" in the bottom waters of the lake. Similar to the high TKN and phosphorous values reported for this sample, these results are fairly typical and <b>are not cause for any immediate concern.</b>"