7/22/2010 CONSERVATION COMMISSION Minutes

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i Jim Holmes would like to remove five trees that are very close to the house. Agent McManus has inspected the trees and confirms they are very close, approximately within 5 ft of the house. Motion made, seconded and unanimously carried for a Negative Determination 7:30 .Jonathon Craft (16 Popponessett Island Road) Construct/Install ' privacy fence RDA Resource,area: Popponnesset Bay Stan Hyde is seeking permission to install a 6' fence along one side of the lot line. Agent McManus mentions a thin strip of pines and shrubs that separate the property but the fence will give more privacy. Chairman Fitzsimmons states that there is to be at least a 6}' space under the fence for wildlife. Motion made, seconded and -unanimously carried for a Negative Determination 7:33 Jon Davis 1 Air Force Ctr. For Engineering & Environment Ashum t Pond) Nol Treatment of pond; phosphorus inactivation utilizing buffered mix f alum sodium alum Resource Area- Jon Davis from AFCEE and states this project is a supplemental aluminum treatment to the 2001 treatment. This one is larger with 561/2 acre coverage in the 3 ' or deeper parts of the pond to stay away from shellfish habitant. It will use the same protocol as the first project especially in terms of pre/post and during monitoring. Agent McManus asks about how long the treatment process is and Dominic Mirarngalo from Environmental Engineer with Aquatic Control Technology answers that it will be about five— sic days including the pilot treatment. They will conduct the pilot treatment and then monitor it for a couple of days followed by five days of consecutive application but also allowing for any weather interruptions. It will proceed unless winds speeds are 20 mph or more or if waters are unsafe for the barge. It is also mentioned that they will apply one dose in one direction and the other dose in the other direction. Alan Wet rnan lives on Ashument Pond and is concerned with the aluminum treatment and asks if thea were any other alternative treatments considered. He asks if there were any studies done on Methyl Mercury during the period of the last treatment. He mentions heavily documented sulfate reducing microbes that lead to increases of Methyl Mercury measurements and has a significant mercury problem with the fish. Mr. wet man mentions an alternative of a non-chemical treatment such as Long Range Circulation which has been proven successful in hundreds of ponds. Mr. Davis is aware of the issues during the fiat treatment and took measurements but it did not shover any significant difference as the pond already had sulfate load which was causing elevation of mercury and the addition of aluminum will not exacerbate the problem that already exists. Mr. Mirangarlo states there were several studies conducted which included costs, effectiveness and energy consumption; the results were not based only on effectiveness but longevity as well. Jean Crocker who is active on-the cleanup committee speaks of problems Cape gide and mentions that Sandwich has treated their ponds with something different but maybe all of this should lead to a cape wide discussion of all the different treatments being used. Ed Ei ner from the School of Marine Science and Technology in UMass Dartmouth has been involved with the Ashu met Pond. He stated that Alum has been used successfully n three ponds on the Carpe. Mr. Eikner also mentions that solar recycling willde- stratify the lake and will end up with a coldwater fishery which will result in no trout.