10/29/1987 CONSERVATION COMMISSION Minutes

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Conservation Commission Page 11 . October 29, 1987 She i n i'red which of the three best options the- comm i ss-i ori would prefer. The commission agreed they would like to look at the site . before making a decision as this was not discussed at the on-site. s -Langha s . advised Mr. Vir,81111,o has not giVen a formal approv,al and is waiting for the commission ' s action. S e stated during the on-site it had been discussed how the -'sewer project could be handled under the wetland protection act and all public utilities axe considered a limited pro, ect ,under the fresh water wetland regulations, Seraion 1053, .3D, where there are four per- for.mance standards to be met, 1 . No reasonable alternatives: -Ire this case we recosnize recognizethat the town is considering makinS a subregional sewer plant and it would be to the ben -fit o f .all that the mains of the sewer be on public property, Quihaquisset. Inds It then became, do you put it in the pavement or o-n the side of the road? As- it is too difficult to go through this -r« lvert with the sewer main it was kept on the side of - the goad. For cost, maintenance and to beep it on public property, this is the only reasonable alternative. . Best av it 'le measures to minimize the disturbance or adverse effect on the -wetland. In this case- that dewatering tabes place, i the ommissien. . .s . - n ern d about siltation, that bales of hay or a siltation barrie-r -' e used- to hold the water and in order to deep the d waterin at :a -.vi-niv m, as you cross the stream a trench box o sheeting be used that holds the sides in place and minimize the mount of water that ev es in. - n addition to that, it be excavated and back- filled ac - illed i mmedi.at- ly in small sections' . 3 . Sewer pipes be water tight andneve-nt any leakage . In this case, as it crosses the stream, the concrete casing will prevent leakage and in addition, a water tight ria-in will be used the entire distance. . Surface vegetation and contours shall be substantially restored: The cranberry bog will be rehab i l i tared. -Where they dig up the northerly ditch and the 5 foot- side area of the bog will be sub- stantially restored. Ms Behrman questioned the volume of water- and Ms Langhaus er stated no one can ell as it is ground water. She stated an engineer should be present on-sive to make decisions immediately that come up . Comments from the public: John Brophy questioned to piping to be used . ids Lan haus r advised it is 1 inch PVC gravity flow. Under the pipes will be gravel beds. It was noted the MEPA process will not be over until the end of January, or1t I " ued perid I -n g art JL IL 2 IL to D ecemb r• JL 7 1 987 ZZ 3 0 Pern . � � 34 X