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total nitrogen level. They accounted for mounding on the leach field to get 5' separation to <br /> groundwater. The leaching is outside of all wetland buffers, so no variances are requested. <br /> Mr. Harrington asked if a generator is being provided for back-up power, and Mr. Henderson <br /> answered that they are proposing a generator receptacle on the panel, in the event a portable <br /> generator is needed. He stated that,on affordable housing,they typically try to go with the less <br /> expensive option,but indicated that a permanent standby generator could be added. It is possible <br /> that one maybe required for the overall site,but they won't know until they have a more detailed <br /> design on the project. <br /> Chair Baumgaertel asked whatthe estimated reserve capacitywas,and Mr. Henderson answered <br /> that they have 7800 gallons of emergency storage in the effluent pumping chamber, and there <br /> would be a little storage in other components, but not a significant amount. Chair Baumgaertel <br /> asked Ms. Warden and the Health Agent if they were comfortable with that amount of reserve <br /> without a permanently attached back-up power source,and Mr.Harrington and Ms.Warden both <br /> agreed they would be more comfortable if there was permanent back-up power, even though it <br /> meets Title V. <br /> Mr. Henderson asked if the reserve area would need to be constructed at the same time as the <br /> primary,and Mr. Harrington answered in the negative, because this is not a commercial site. Mr. <br /> Henderson stated that they are proposing a multi-zone valve that alternates distribution to the <br /> three fields, and Mr. Harrington advised that the multl-zone valve would be a maintenance item. <br /> Chair Baumgaertel suggested a larger equalization tank to hedge bets against the power outage. <br /> Mr. Harrington noted that the plan reflects a 3000 gallon equalization tank on the profile but, in <br /> site plan portion, it is labelled as 4000 gallons with an optional 6000. Mr. Henderson clarified that <br /> the plan should show a straight 3000 gallon equalization tank,with no aeration chamber. <br /> It was agreed that Mr.Henderson would submit a full set of construction plans to the Board when <br /> they are available. Mr. Harrington stated he was specifically looking for more information <br /> regarding the profile on the components. He noted that, with a pump system, no venting is <br /> required,but stressed that these system operate better and longer with venting. <br /> Mr. Harrington asked what the carbon source would be, and Mr. Henderson answered it may be <br /> 50%methanol or a Micro-C. Mr. Harrington warned that any of the methanol is flammable, and <br /> the Fire Department would have a lot of conditions for approval of its use. Mr. Henderson stated <br /> that the system would be set-up with one main panel that would control everything, but he was <br /> not sure if it would have the ability to be operated remotely. He indicated that it might be an <br /> option to have Aquapoint operate their system. <br /> Chair Baumgaertel indicated that, conceptually, with the addition of the generator, the plan <br /> looked good, but there are a few details that need to be cleaned up, and they need to see some <br /> of the notes that are typically on a Title 5 plan. Mr.Henderson reminded the Board that they still <br /> need to go through the 40B permitting process. Mr.Harrington agreed to review everything again <br /> before it goes to ZBA. <br /> There being no further comments or discussion,Veronica Warden moved to approve the septic <br /> system design for 950 Falmouth Road/0 Cooper Road with the conditions that the installation be <br /> in accordance with the DEP Provisional Approval Letter, installed by a certified installer,approval <br /> of the system by the design engineer and the manufacturer, revised plans be submitted to the <br /> 3 <br />