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IMD' 4d14% <br /> Subdivision. He addressed the issue of nitrogen levels in Ockway <br /> Bay. He indicated to the Board that all of the points of the <br /> ii Town By-Laws relating to Water Quality have been addressed. <br /> .! Mr. Frank made reference to the buildout analysis for the <br /> entire ground water recharge area to Ockway Bay including modeled <br /> nitrogen, nutrient load and nitrogen load to the Bay as indicated <br /> G''M►'N r'�,,i on page -2- of said report, a copy of which is attached and filed <br /> herewith. <br /> A�+,V <br /> Mr. Nelson explained that this portion of Popponesset Bay <br /> system flushes very fast, less than a day. <br /> Val <br /> (Consulting Engineer, Charles Rowley arrived at the Meeting <br /> at 70 <br /> i�;Wo. To clarify, the Chairman asked if water quality impacts are <br />�4� RYL4, „ far below any thresholds the Board should be concerned with. <br /> i��, r,, <br /> ��° � „� Thomas Fudala inquired of Mr. Nelson if the Commission had <br /> *„ i � q,. set a flushing rate for Ockway Bay itself, being a little more <br /> enclosed than the main Bay. <br /> � i <br /> ,•d� i� :�,,,,, Mr. Nelson responded that the depth in Ockway Bay is very <br /> similar to the rest of the system. it is slightly more enclosed, <br /> but not enough to restrict tidal flow. There is no specific rate <br /> as to how water flushes in and out of Ockway Bay. <br />�;* } The Chairman introduced a Memo prepared by Eric Smith <br /> regarding the Water Quality. "As part of the Definitive Plan <br /> application process" (By-Laws, etc. under which the report is <br />" done, by Horsley & Witten, Inc. , and this is his Preliminary <br /> Review) . "My initial review shows that all the issues addressed <br /> in the By-Laws were addressed but one. The report lacks any <br /> calcs for the levels of phosphorus this development will <br /> generate. This omission was because of a conversation I had with <br /> Mark Nelson of Horsley & Witten, Inc. He asked me, since their <br /> l rll� :r k' applicant property is on Ockway, which is salt water etc. , <br /> v �� , specifies that for salt water bodies the nutrient loading <br /> analysis only needs to be done for nitrogen, would they not have <br /> to do such an analysis for phosphorus. This statement is <br /> correct. Their report did only need to run the loading study for <br /> the nitrogen portion. They still need however to provide calcs <br /> as to the amount of phosphorus the development will generate, as <br /> Ilk" specified in (states the By-Law Section) . " <br /> y��` T�1n •' rI <br /> ti;��{'�'4:•' The Chairman asked if any phosphorus calcs have been done. <br /> '-N Mr. Nelson said he would provide the Board with that <br />` � information. <br /> The Chairman pointed out the numbers listed for impervious <br />`q "k surface area in the appendices D, E and F which are the nitrogen <br /> s�h�y4 <br /> v 4 <br />