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13 May 1399 <br /> Page 5. <br /> Mr. Hanks stated there should be a letter in the file from sabatia who <br /> postulated a pond environment would be an'improvement. Paul Lelito posed <br /> the same thing but also intimated you could make a combination of upland <br /> vegetation and pond environment. In both cases, you would have to have <br /> water supply to keep the ponds full. More recently, when going over this <br /> with Diane Boretos, she made them aware of snag habitat. <br /> Mr. Hanks spoke to the improvements would be after upland disposal. <br /> Mr. Rosenberg stated that is the only thing that would affect Conservation. <br /> Mr. Wollenhaupt asked how long it would take to get to the final product, to <br /> their restoration and habitat improvement? Mr. Hanks stated they would <br /> leave it to drain and settle for one year. within three years they would have <br /> a pretty good environment. <br /> Mr. Rosenberg asked if they would have to remove the dredge material? Mr. <br /> Hanks stated the proposal is to leave it there. There is no contaminant. <br /> Mr. Wirsen asked if when spearing of contamination Mr. Hanks was tallying <br /> about heavy metals and VOC's or a High nutrient content also? Mr. Hanks <br /> advised they know there is high nutrient content, that is not considered <br /> contamination. <br /> Mr.. wirsen stated under Massachusetts Drinking water standards, if you <br /> look at nitrates and nitrogen those are secondary MCO's. <br /> Mr. Hanks stated the operational requirements for doing hydraulic dredging <br /> because it is 0% water they are dealing 15,000 c.y. of material. It will take <br /> three acres, five feet deep, for upland. disposal. If thence is a pond and you <br /> pump and let it settle overnight, drain the clear liquid off the next day, drain <br /> it back into the river and do this during the period of November to February, <br /> then you don't put the nutrients in the ground water. The basin is <br /> engineered to prevent the currents from stirring up the silt. <br /> Mr. Rosenberg asked if they would leave all the nutrients and salt in the <br /> ground? 1r. Hanks advised as the material is dug out, there wiU be some <br /> Fresh water percolating in so it won't be the same salinity. Mr. Rosenberg <br /> asked if removing the silt, is that silt not substantially nutrients? Mr. Hanks <br /> did not have a number. <br />